split mjpeg.c into an encoder and a decoder file
authorAurelien Jacobs <aurel@gnuage.org>
Thu, 17 May 2007 16:29:11 +0000 (16:29 +0000)
committerAurelien Jacobs <aurel@gnuage.org>
Thu, 17 May 2007 16:29:11 +0000 (16:29 +0000)
Originally committed as revision 9048 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/Makefile
libavcodec/mjpeg.c
libavcodec/mjpeg.h
libavcodec/mjpegdec.c [copied from libavcodec/mjpeg.c with 70% similarity]
libavcodec/mjpegenc.c [new file with mode: 0644]

index d890b8e..6857fa4 100644 (file)
@@ -99,13 +99,13 @@ OBJS-$(CONFIG_INTERPLAY_VIDEO_DECODER) += interplayvideo.o
 OBJS-$(CONFIG_INTERPLAY_DPCM_DECODER)  += dpcm.o
 OBJS-$(CONFIG_JPEGLS_ENCODER)          += jpeglsenc.o jpegls.o
 OBJS-$(CONFIG_KMVC_DECODER)            += kmvc.o
-OBJS-$(CONFIG_LJPEG_ENCODER)           += mjpeg.o jpeglsdec.o jpegls.o
+OBJS-$(CONFIG_LJPEG_ENCODER)           += mjpegenc.o mjpeg.o mpegvideo.o
 OBJS-$(CONFIG_LOCO_DECODER)            += loco.o
 OBJS-$(CONFIG_MACE3_DECODER)           += mace.o
 OBJS-$(CONFIG_MACE6_DECODER)           += mace.o
-OBJS-$(CONFIG_MJPEG_DECODER)           += mjpeg.o jpeglsdec.o jpegls.o
-OBJS-$(CONFIG_MJPEG_ENCODER)           += mjpeg.o jpeglsdec.o mpegvideo.o jpegls.o
-OBJS-$(CONFIG_MJPEGB_DECODER)          += mjpeg.o jpeglsdec.o jpegls.o
+OBJS-$(CONFIG_MJPEG_DECODER)           += mjpegdec.o mjpeg.o jpeglsdec.o jpegls.o
+OBJS-$(CONFIG_MJPEG_ENCODER)           += mjpegenc.o mjpeg.o mpegvideo.o
+OBJS-$(CONFIG_MJPEGB_DECODER)          += mjpegdec.o mjpeg.o jpeglsdec.o jpegls.o
 OBJS-$(CONFIG_MMVIDEO_DECODER)         += mmvideo.o
 OBJS-$(CONFIG_MP2_ENCODER)             += mpegaudio.o
 OBJS-$(CONFIG_MPC7_DECODER)            += mpc.o
@@ -153,14 +153,14 @@ OBJS-$(CONFIG_SOL_DPCM_DECODER)        += dpcm.o
 OBJS-$(CONFIG_SONIC_DECODER)           += sonic.o
 OBJS-$(CONFIG_SONIC_ENCODER)           += sonic.o
 OBJS-$(CONFIG_SONIC_LS_DECODER)        += sonic.o
-OBJS-$(CONFIG_SP5X_DECODER)            += mjpeg.o jpeglsdec.o jpegls.o
+OBJS-$(CONFIG_SP5X_DECODER)            += mjpegdec.o mjpeg.o jpeglsdec.o jpegls.o
 OBJS-$(CONFIG_SVQ1_DECODER)            += svq1.o
 OBJS-$(CONFIG_SVQ1_ENCODER)            += svq1.o
 OBJS-$(CONFIG_SVQ3_DECODER)            += h264.o
 OBJS-$(CONFIG_TARGA_DECODER)           += targa.o
 OBJS-$(CONFIG_TARGA_ENCODER)           += targaenc.o rle.o
 OBJS-$(CONFIG_THEORA_DECODER)          += vp3.o xiph.o vp3dsp.o
-OBJS-$(CONFIG_THP_DECODER)             += mjpeg.o jpeglsdec.o jpegls.o
+OBJS-$(CONFIG_THP_DECODER)             += mjpegdec.o mjpeg.o jpeglsdec.o jpegls.o
 OBJS-$(CONFIG_TIERTEXSEQVIDEO_DECODER) += tiertexseqv.o
 OBJS-$(CONFIG_TIFF_DECODER)            += tiff.o lzw.o
 OBJS-$(CONFIG_TIFF_ENCODER)            += tiffenc.o rle.o lzwenc.o
@@ -310,7 +310,7 @@ OBJS-$(CONFIG_REMOVE_EXTRADATA_BSF)    += bitstream_filter.o
 OBJS-$(CONFIG_NOISE_BSF)               += bitstream_filter.o
 OBJS-$(CONFIG_MP3_HEADER_COMPRESS_BSF) += bitstream_filter.o
 OBJS-$(CONFIG_MP3_HEADER_DECOMPRESS_BSF) += bitstream_filter.o
-OBJS-$(CONFIG_MJPEGA_DUMP_HEADER_BSF)  += mjpeg.o jpeglsdec.o jpegls.o
+OBJS-$(CONFIG_MJPEGA_DUMP_HEADER_BSF)  += mjpegdec.o mjpeg.o jpeglsdec.o jpegls.o
 OBJS-$(CONFIG_IMX_DUMP_HEADER_BSF)     += mpeg12.o
 
 OBJS-$(HAVE_PTHREADS)                  += pthread.o
dissimilarity index 93%
index 1b04d0f..ab855fc 100644 (file)
-/*
- * MJPEG encoder and decoder
- * Copyright (c) 2000, 2001 Fabrice Bellard.
- * Copyright (c) 2003 Alex Beregszaszi
- * Copyright (c) 2003-2004 Michael Niedermayer
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * Support for external huffman table, various fixes (AVID workaround),
- * aspecting, new decode_frame mechanism and apple mjpeg-b support
- *                                  by Alex Beregszaszi
- */
-
-/**
- * @file mjpeg.c
- * MJPEG encoder and decoder.
- */
-
-//#define DEBUG
-#include <assert.h>
-
-#include "avcodec.h"
-#include "dsputil.h"
-#include "mpegvideo.h"
-#include "bytestream.h"
-#include "mjpeg.h"
-#include "jpeglsdec.h"
-
-/* use two quantizer tables (one for luminance and one for chrominance) */
-/* not yet working */
-#undef TWOMATRIXES
-
-typedef struct MJpegContext {
-    uint8_t huff_size_dc_luminance[12]; //FIXME use array [3] instead of lumi / chrom, for easier addressing
-    uint16_t huff_code_dc_luminance[12];
-    uint8_t huff_size_dc_chrominance[12];
-    uint16_t huff_code_dc_chrominance[12];
-
-    uint8_t huff_size_ac_luminance[256];
-    uint16_t huff_code_ac_luminance[256];
-    uint8_t huff_size_ac_chrominance[256];
-    uint16_t huff_code_ac_chrominance[256];
-} MJpegContext;
-
-#if 0
-/* These are the sample quantization tables given in JPEG spec section K.1.
- * The spec says that the values given produce "good" quality, and
- * when divided by 2, "very good" quality.
- */
-static const unsigned char std_luminance_quant_tbl[64] = {
-    16,  11,  10,  16,  24,  40,  51,  61,
-    12,  12,  14,  19,  26,  58,  60,  55,
-    14,  13,  16,  24,  40,  57,  69,  56,
-    14,  17,  22,  29,  51,  87,  80,  62,
-    18,  22,  37,  56,  68, 109, 103,  77,
-    24,  35,  55,  64,  81, 104, 113,  92,
-    49,  64,  78,  87, 103, 121, 120, 101,
-    72,  92,  95,  98, 112, 100, 103,  99
-};
-static const unsigned char std_chrominance_quant_tbl[64] = {
-    17,  18,  24,  47,  99,  99,  99,  99,
-    18,  21,  26,  66,  99,  99,  99,  99,
-    24,  26,  56,  99,  99,  99,  99,  99,
-    47,  66,  99,  99,  99,  99,  99,  99,
-    99,  99,  99,  99,  99,  99,  99,  99,
-    99,  99,  99,  99,  99,  99,  99,  99,
-    99,  99,  99,  99,  99,  99,  99,  99,
-    99,  99,  99,  99,  99,  99,  99,  99
-};
-#endif
-
-/* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
-/* IMPORTANT: these are only valid for 8-bit data precision! */
-static const uint8_t bits_dc_luminance[17] =
-{ /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
-static const uint8_t val_dc_luminance[] =
-{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
-
-static const uint8_t bits_dc_chrominance[17] =
-{ /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
-static const uint8_t val_dc_chrominance[] =
-{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
-
-static const uint8_t bits_ac_luminance[17] =
-{ /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
-static const uint8_t val_ac_luminance[] =
-{ 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
-  0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
-  0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
-  0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
-  0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
-  0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
-  0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
-  0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
-  0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
-  0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
-  0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
-  0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
-  0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
-  0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
-  0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
-  0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
-  0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
-  0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
-  0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
-  0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
-  0xf9, 0xfa
-};
-
-static const uint8_t bits_ac_chrominance[17] =
-{ /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
-
-static const uint8_t val_ac_chrominance[] =
-{ 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
-  0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
-  0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
-  0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
-  0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
-  0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
-  0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
-  0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
-  0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
-  0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
-  0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
-  0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
-  0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
-  0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
-  0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
-  0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
-  0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
-  0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
-  0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
-  0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
-  0xf9, 0xfa
-};
-
-/* isn't this function nicer than the one in the libjpeg ? */
-static void build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
-                                const uint8_t *bits_table, const uint8_t *val_table)
-{
-    int i, j, k,nb, code, sym;
-
-    code = 0;
-    k = 0;
-    for(i=1;i<=16;i++) {
-        nb = bits_table[i];
-        for(j=0;j<nb;j++) {
-            sym = val_table[k++];
-            huff_size[sym] = i;
-            huff_code[sym] = code;
-            code++;
-        }
-        code <<= 1;
-    }
-}
-
-#ifdef CONFIG_ENCODERS
-int mjpeg_init(MpegEncContext *s)
-{
-    MJpegContext *m;
-
-    m = av_malloc(sizeof(MJpegContext));
-    if (!m)
-        return -1;
-
-    s->min_qcoeff=-1023;
-    s->max_qcoeff= 1023;
-
-    /* build all the huffman tables */
-    build_huffman_codes(m->huff_size_dc_luminance,
-                        m->huff_code_dc_luminance,
-                        bits_dc_luminance,
-                        val_dc_luminance);
-    build_huffman_codes(m->huff_size_dc_chrominance,
-                        m->huff_code_dc_chrominance,
-                        bits_dc_chrominance,
-                        val_dc_chrominance);
-    build_huffman_codes(m->huff_size_ac_luminance,
-                        m->huff_code_ac_luminance,
-                        bits_ac_luminance,
-                        val_ac_luminance);
-    build_huffman_codes(m->huff_size_ac_chrominance,
-                        m->huff_code_ac_chrominance,
-                        bits_ac_chrominance,
-                        val_ac_chrominance);
-
-    s->mjpeg_ctx = m;
-    return 0;
-}
-
-void mjpeg_close(MpegEncContext *s)
-{
-    av_free(s->mjpeg_ctx);
-}
-#endif //CONFIG_ENCODERS
-
-#define PREDICT(ret, topleft, top, left, predictor)\
-    switch(predictor){\
-        case 1: ret= left; break;\
-        case 2: ret= top; break;\
-        case 3: ret= topleft; break;\
-        case 4: ret= left   +   top - topleft; break;\
-        case 5: ret= left   + ((top - topleft)>>1); break;\
-        case 6: ret= top + ((left   - topleft)>>1); break;\
-        default:\
-        case 7: ret= (left + top)>>1; break;\
-    }
-
-#ifdef CONFIG_ENCODERS
-/* table_class: 0 = DC coef, 1 = AC coefs */
-static int put_huffman_table(MpegEncContext *s, int table_class, int table_id,
-                             const uint8_t *bits_table, const uint8_t *value_table)
-{
-    PutBitContext *p = &s->pb;
-    int n, i;
-
-    put_bits(p, 4, table_class);
-    put_bits(p, 4, table_id);
-
-    n = 0;
-    for(i=1;i<=16;i++) {
-        n += bits_table[i];
-        put_bits(p, 8, bits_table[i]);
-    }
-
-    for(i=0;i<n;i++)
-        put_bits(p, 8, value_table[i]);
-
-    return n + 17;
-}
-
-static void jpeg_table_header(MpegEncContext *s)
-{
-    PutBitContext *p = &s->pb;
-    int i, j, size;
-    uint8_t *ptr;
-
-    /* quant matrixes */
-    put_marker(p, DQT);
-#ifdef TWOMATRIXES
-    put_bits(p, 16, 2 + 2 * (1 + 64));
-#else
-    put_bits(p, 16, 2 + 1 * (1 + 64));
-#endif
-    put_bits(p, 4, 0); /* 8 bit precision */
-    put_bits(p, 4, 0); /* table 0 */
-    for(i=0;i<64;i++) {
-        j = s->intra_scantable.permutated[i];
-        put_bits(p, 8, s->intra_matrix[j]);
-    }
-#ifdef TWOMATRIXES
-    put_bits(p, 4, 0); /* 8 bit precision */
-    put_bits(p, 4, 1); /* table 1 */
-    for(i=0;i<64;i++) {
-        j = s->intra_scantable.permutated[i];
-        put_bits(p, 8, s->chroma_intra_matrix[j]);
-    }
-#endif
-
-    /* huffman table */
-    put_marker(p, DHT);
-    flush_put_bits(p);
-    ptr = pbBufPtr(p);
-    put_bits(p, 16, 0); /* patched later */
-    size = 2;
-    size += put_huffman_table(s, 0, 0, bits_dc_luminance, val_dc_luminance);
-    size += put_huffman_table(s, 0, 1, bits_dc_chrominance, val_dc_chrominance);
-
-    size += put_huffman_table(s, 1, 0, bits_ac_luminance, val_ac_luminance);
-    size += put_huffman_table(s, 1, 1, bits_ac_chrominance, val_ac_chrominance);
-    ptr[0] = size >> 8;
-    ptr[1] = size;
-}
-
-static void jpeg_put_comments(MpegEncContext *s)
-{
-    PutBitContext *p = &s->pb;
-    int size;
-    uint8_t *ptr;
-
-    if (s->aspect_ratio_info /* && !lossless */)
-    {
-    /* JFIF header */
-    put_marker(p, APP0);
-    put_bits(p, 16, 16);
-    ff_put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */
-    put_bits(p, 16, 0x0201); /* v 1.02 */
-    put_bits(p, 8, 0); /* units type: 0 - aspect ratio */
-    put_bits(p, 16, s->avctx->sample_aspect_ratio.num);
-    put_bits(p, 16, s->avctx->sample_aspect_ratio.den);
-    put_bits(p, 8, 0); /* thumbnail width */
-    put_bits(p, 8, 0); /* thumbnail height */
-    }
-
-    /* comment */
-    if(!(s->flags & CODEC_FLAG_BITEXACT)){
-        put_marker(p, COM);
-        flush_put_bits(p);
-        ptr = pbBufPtr(p);
-        put_bits(p, 16, 0); /* patched later */
-        ff_put_string(p, LIBAVCODEC_IDENT, 1);
-        size = strlen(LIBAVCODEC_IDENT)+3;
-        ptr[0] = size >> 8;
-        ptr[1] = size;
-    }
-
-    if(  s->avctx->pix_fmt == PIX_FMT_YUV420P
-       ||s->avctx->pix_fmt == PIX_FMT_YUV422P
-       ||s->avctx->pix_fmt == PIX_FMT_YUV444P){
-        put_marker(p, COM);
-        flush_put_bits(p);
-        ptr = pbBufPtr(p);
-        put_bits(p, 16, 0); /* patched later */
-        ff_put_string(p, "CS=ITU601", 1);
-        size = strlen("CS=ITU601")+3;
-        ptr[0] = size >> 8;
-        ptr[1] = size;
-    }
-}
-
-void mjpeg_picture_header(MpegEncContext *s)
-{
-    const int lossless= s->avctx->codec_id != CODEC_ID_MJPEG;
-
-    put_marker(&s->pb, SOI);
-
-    jpeg_put_comments(s);
-
-    jpeg_table_header(s);
-
-    switch(s->avctx->codec_id){
-    case CODEC_ID_MJPEG:  put_marker(&s->pb, SOF0 ); break;
-    case CODEC_ID_LJPEG:  put_marker(&s->pb, SOF3 ); break;
-    default: assert(0);
-    }
-
-    put_bits(&s->pb, 16, 17);
-    if(lossless && s->avctx->pix_fmt == PIX_FMT_RGB32)
-        put_bits(&s->pb, 8, 9); /* 9 bits/component RCT */
-    else
-        put_bits(&s->pb, 8, 8); /* 8 bits/component */
-    put_bits(&s->pb, 16, s->height);
-    put_bits(&s->pb, 16, s->width);
-    put_bits(&s->pb, 8, 3); /* 3 components */
-
-    /* Y component */
-    put_bits(&s->pb, 8, 1); /* component number */
-    put_bits(&s->pb, 4, s->mjpeg_hsample[0]); /* H factor */
-    put_bits(&s->pb, 4, s->mjpeg_vsample[0]); /* V factor */
-    put_bits(&s->pb, 8, 0); /* select matrix */
-
-    /* Cb component */
-    put_bits(&s->pb, 8, 2); /* component number */
-    put_bits(&s->pb, 4, s->mjpeg_hsample[1]); /* H factor */
-    put_bits(&s->pb, 4, s->mjpeg_vsample[1]); /* V factor */
-#ifdef TWOMATRIXES
-    put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
-#else
-    put_bits(&s->pb, 8, 0); /* select matrix */
-#endif
-
-    /* Cr component */
-    put_bits(&s->pb, 8, 3); /* component number */
-    put_bits(&s->pb, 4, s->mjpeg_hsample[2]); /* H factor */
-    put_bits(&s->pb, 4, s->mjpeg_vsample[2]); /* V factor */
-#ifdef TWOMATRIXES
-    put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
-#else
-    put_bits(&s->pb, 8, 0); /* select matrix */
-#endif
-
-    /* scan header */
-    put_marker(&s->pb, SOS);
-    put_bits(&s->pb, 16, 12); /* length */
-    put_bits(&s->pb, 8, 3); /* 3 components */
-
-    /* Y component */
-    put_bits(&s->pb, 8, 1); /* index */
-    put_bits(&s->pb, 4, 0); /* DC huffman table index */
-    put_bits(&s->pb, 4, 0); /* AC huffman table index */
-
-    /* Cb component */
-    put_bits(&s->pb, 8, 2); /* index */
-    put_bits(&s->pb, 4, 1); /* DC huffman table index */
-    put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
-
-    /* Cr component */
-    put_bits(&s->pb, 8, 3); /* index */
-    put_bits(&s->pb, 4, 1); /* DC huffman table index */
-    put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
-
-    put_bits(&s->pb, 8, lossless ? s->avctx->prediction_method+1 : 0); /* Ss (not used) */
-
-    switch(s->avctx->codec_id){
-    case CODEC_ID_MJPEG:  put_bits(&s->pb, 8, 63); break; /* Se (not used) */
-    case CODEC_ID_LJPEG:  put_bits(&s->pb, 8,  0); break; /* not used */
-    default: assert(0);
-    }
-
-    put_bits(&s->pb, 8, 0); /* Ah/Al (not used) */
-}
-
-static void escape_FF(MpegEncContext *s, int start)
-{
-    int size= put_bits_count(&s->pb) - start*8;
-    int i, ff_count;
-    uint8_t *buf= s->pb.buf + start;
-    int align= (-(size_t)(buf))&3;
-
-    assert((size&7) == 0);
-    size >>= 3;
-
-    ff_count=0;
-    for(i=0; i<size && i<align; i++){
-        if(buf[i]==0xFF) ff_count++;
-    }
-    for(; i<size-15; i+=16){
-        int acc, v;
-
-        v= *(uint32_t*)(&buf[i]);
-        acc= (((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
-        v= *(uint32_t*)(&buf[i+4]);
-        acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
-        v= *(uint32_t*)(&buf[i+8]);
-        acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
-        v= *(uint32_t*)(&buf[i+12]);
-        acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
-
-        acc>>=4;
-        acc+= (acc>>16);
-        acc+= (acc>>8);
-        ff_count+= acc&0xFF;
-    }
-    for(; i<size; i++){
-        if(buf[i]==0xFF) ff_count++;
-    }
-
-    if(ff_count==0) return;
-
-    /* skip put bits */
-    for(i=0; i<ff_count-3; i+=4)
-        put_bits(&s->pb, 32, 0);
-    put_bits(&s->pb, (ff_count-i)*8, 0);
-    flush_put_bits(&s->pb);
-
-    for(i=size-1; ff_count; i--){
-        int v= buf[i];
-
-        if(v==0xFF){
-//printf("%d %d\n", i, ff_count);
-            buf[i+ff_count]= 0;
-            ff_count--;
-        }
-
-        buf[i+ff_count]= v;
-    }
-}
-
-void ff_mjpeg_stuffing(PutBitContext * pbc)
-{
-    int length;
-    length= (-put_bits_count(pbc))&7;
-    if(length) put_bits(pbc, length, (1<<length)-1);
-}
-
-void mjpeg_picture_trailer(MpegEncContext *s)
-{
-    ff_mjpeg_stuffing(&s->pb);
-    flush_put_bits(&s->pb);
-
-    assert((s->header_bits&7)==0);
-
-    escape_FF(s, s->header_bits>>3);
-
-    put_marker(&s->pb, EOI);
-}
-
-static inline void mjpeg_encode_dc(MpegEncContext *s, int val,
-                                   uint8_t *huff_size, uint16_t *huff_code)
-{
-    int mant, nbits;
-
-    if (val == 0) {
-        put_bits(&s->pb, huff_size[0], huff_code[0]);
-    } else {
-        mant = val;
-        if (val < 0) {
-            val = -val;
-            mant--;
-        }
-
-        nbits= av_log2_16bit(val) + 1;
-
-        put_bits(&s->pb, huff_size[nbits], huff_code[nbits]);
-
-        put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
-    }
-}
-
-static void encode_block(MpegEncContext *s, DCTELEM *block, int n)
-{
-    int mant, nbits, code, i, j;
-    int component, dc, run, last_index, val;
-    MJpegContext *m = s->mjpeg_ctx;
-    uint8_t *huff_size_ac;
-    uint16_t *huff_code_ac;
-
-    /* DC coef */
-    component = (n <= 3 ? 0 : (n&1) + 1);
-    dc = block[0]; /* overflow is impossible */
-    val = dc - s->last_dc[component];
-    if (n < 4) {
-        mjpeg_encode_dc(s, val, m->huff_size_dc_luminance, m->huff_code_dc_luminance);
-        huff_size_ac = m->huff_size_ac_luminance;
-        huff_code_ac = m->huff_code_ac_luminance;
-    } else {
-        mjpeg_encode_dc(s, val, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
-        huff_size_ac = m->huff_size_ac_chrominance;
-        huff_code_ac = m->huff_code_ac_chrominance;
-    }
-    s->last_dc[component] = dc;
-
-    /* AC coefs */
-
-    run = 0;
-    last_index = s->block_last_index[n];
-    for(i=1;i<=last_index;i++) {
-        j = s->intra_scantable.permutated[i];
-        val = block[j];
-        if (val == 0) {
-            run++;
-        } else {
-            while (run >= 16) {
-                put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
-                run -= 16;
-            }
-            mant = val;
-            if (val < 0) {
-                val = -val;
-                mant--;
-            }
-
-            nbits= av_log2(val) + 1;
-            code = (run << 4) | nbits;
-
-            put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]);
-
-            put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
-            run = 0;
-        }
-    }
-
-    /* output EOB only if not already 64 values */
-    if (last_index < 63 || run != 0)
-        put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
-}
-
-void mjpeg_encode_mb(MpegEncContext *s,
-                     DCTELEM block[6][64])
-{
-    int i;
-    for(i=0;i<5;i++) {
-        encode_block(s, block[i], i);
-    }
-    if (s->chroma_format == CHROMA_420) {
-        encode_block(s, block[5], 5);
-    } else {
-        encode_block(s, block[6], 6);
-        encode_block(s, block[5], 5);
-        encode_block(s, block[7], 7);
-    }
-}
-
-static int encode_picture_lossless(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
-    MpegEncContext * const s = avctx->priv_data;
-    MJpegContext * const m = s->mjpeg_ctx;
-    AVFrame *pict = data;
-    const int width= s->width;
-    const int height= s->height;
-    AVFrame * const p= (AVFrame*)&s->current_picture;
-    const int predictor= avctx->prediction_method+1;
-
-    init_put_bits(&s->pb, buf, buf_size);
-
-    *p = *pict;
-    p->pict_type= FF_I_TYPE;
-    p->key_frame= 1;
-
-    mjpeg_picture_header(s);
-
-    s->header_bits= put_bits_count(&s->pb);
-
-    if(avctx->pix_fmt == PIX_FMT_RGB32){
-        int x, y, i;
-        const int linesize= p->linesize[0];
-        uint16_t (*buffer)[4]= (void *) s->rd_scratchpad;
-        int left[3], top[3], topleft[3];
-
-        for(i=0; i<3; i++){
-            buffer[0][i]= 1 << (9 - 1);
-        }
-
-        for(y = 0; y < height; y++) {
-            const int modified_predictor= y ? predictor : 1;
-            uint8_t *ptr = p->data[0] + (linesize * y);
-
-            if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < width*3*4){
-                av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
-                return -1;
-            }
-
-            for(i=0; i<3; i++){
-                top[i]= left[i]= topleft[i]= buffer[0][i];
-            }
-            for(x = 0; x < width; x++) {
-                buffer[x][1] = ptr[4*x+0] - ptr[4*x+1] + 0x100;
-                buffer[x][2] = ptr[4*x+2] - ptr[4*x+1] + 0x100;
-                buffer[x][0] = (ptr[4*x+0] + 2*ptr[4*x+1] + ptr[4*x+2])>>2;
-
-                for(i=0;i<3;i++) {
-                    int pred, diff;
-
-                    PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
-
-                    topleft[i]= top[i];
-                    top[i]= buffer[x+1][i];
-
-                    left[i]= buffer[x][i];
-
-                    diff= ((left[i] - pred + 0x100)&0x1FF) - 0x100;
-
-                    if(i==0)
-                        mjpeg_encode_dc(s, diff, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
-                    else
-                        mjpeg_encode_dc(s, diff, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
-                }
-            }
-        }
-    }else{
-        int mb_x, mb_y, i;
-        const int mb_width  = (width  + s->mjpeg_hsample[0] - 1) / s->mjpeg_hsample[0];
-        const int mb_height = (height + s->mjpeg_vsample[0] - 1) / s->mjpeg_vsample[0];
-
-        for(mb_y = 0; mb_y < mb_height; mb_y++) {
-            if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < mb_width * 4 * 3 * s->mjpeg_hsample[0] * s->mjpeg_vsample[0]){
-                av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
-                return -1;
-            }
-            for(mb_x = 0; mb_x < mb_width; mb_x++) {
-                if(mb_x==0 || mb_y==0){
-                    for(i=0;i<3;i++) {
-                        uint8_t *ptr;
-                        int x, y, h, v, linesize;
-                        h = s->mjpeg_hsample[i];
-                        v = s->mjpeg_vsample[i];
-                        linesize= p->linesize[i];
-
-                        for(y=0; y<v; y++){
-                            for(x=0; x<h; x++){
-                                int pred;
-
-                                ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
-                                if(y==0 && mb_y==0){
-                                    if(x==0 && mb_x==0){
-                                        pred= 128;
-                                    }else{
-                                        pred= ptr[-1];
-                                    }
-                                }else{
-                                    if(x==0 && mb_x==0){
-                                        pred= ptr[-linesize];
-                                    }else{
-                                        PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
-                                    }
-                                }
-
-                                if(i==0)
-                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
-                                else
-                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
-                            }
-                        }
-                    }
-                }else{
-                    for(i=0;i<3;i++) {
-                        uint8_t *ptr;
-                        int x, y, h, v, linesize;
-                        h = s->mjpeg_hsample[i];
-                        v = s->mjpeg_vsample[i];
-                        linesize= p->linesize[i];
-
-                        for(y=0; y<v; y++){
-                            for(x=0; x<h; x++){
-                                int pred;
-
-                                ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
-//printf("%d %d %d %d %8X\n", mb_x, mb_y, x, y, ptr);
-                                PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
-
-                                if(i==0)
-                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
-                                else
-                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
-                            }
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-    emms_c();
-
-    mjpeg_picture_trailer(s);
-    s->picture_number++;
-
-    flush_put_bits(&s->pb);
-    return pbBufPtr(&s->pb) - s->pb.buf;
-//    return (put_bits_count(&f->pb)+7)/8;
-}
-
-#endif //CONFIG_ENCODERS
-
-/******************************************/
-/* decoding */
-
-static int mjpeg_decode_dht(MJpegDecodeContext *s);
-
-static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table,
-                      int nb_codes, int use_static, int is_ac)
-{
-    uint8_t huff_size[256+16];
-    uint16_t huff_code[256+16];
-
-    assert(nb_codes <= 256);
-
-    memset(huff_size, 0, sizeof(huff_size));
-    build_huffman_codes(huff_size, huff_code, bits_table, val_table);
-
-    if(is_ac){
-        memmove(huff_size+16, huff_size, sizeof(uint8_t)*nb_codes);
-        memmove(huff_code+16, huff_code, sizeof(uint16_t)*nb_codes);
-        memset(huff_size, 0, sizeof(uint8_t)*16);
-        memset(huff_code, 0, sizeof(uint16_t)*16);
-        nb_codes += 16;
-    }
-
-    return init_vlc(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2, use_static);
-}
-
-static int mjpeg_decode_init(AVCodecContext *avctx)
-{
-    MJpegDecodeContext *s = avctx->priv_data;
-
-    s->avctx = avctx;
-    dsputil_init(&s->dsp, avctx);
-    ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
-    s->buffer_size = 0;
-    s->buffer = NULL;
-    s->start_code = -1;
-    s->first_picture = 1;
-    s->org_height = avctx->coded_height;
-
-    build_vlc(&s->vlcs[0][0], bits_dc_luminance, val_dc_luminance, 12, 0, 0);
-    build_vlc(&s->vlcs[0][1], bits_dc_chrominance, val_dc_chrominance, 12, 0, 0);
-    build_vlc(&s->vlcs[1][0], bits_ac_luminance, val_ac_luminance, 251, 0, 1);
-    build_vlc(&s->vlcs[1][1], bits_ac_chrominance, val_ac_chrominance, 251, 0, 1);
-
-    if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
-    {
-        av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
-        init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);
-        mjpeg_decode_dht(s);
-        /* should check for error - but dunno */
-    }
-    if (avctx->extradata_size > 9 &&
-        AV_RL32(avctx->extradata + 4) == MKTAG('f','i','e','l')) {
-        if (avctx->extradata[9] == 6) { /* quicktime icefloe 019 */
-            s->interlace_polarity = 1; /* bottom field first */
-            av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
-        }
-    }
-
-    return 0;
-}
-
-
-/* quantize tables */
-static int mjpeg_decode_dqt(MJpegDecodeContext *s)
-{
-    int len, index, i, j;
-
-    len = get_bits(&s->gb, 16) - 2;
-
-    while (len >= 65) {
-        /* only 8 bit precision handled */
-        if (get_bits(&s->gb, 4) != 0)
-        {
-            av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
-            return -1;
-        }
-        index = get_bits(&s->gb, 4);
-        if (index >= 4)
-            return -1;
-        av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
-        /* read quant table */
-        for(i=0;i<64;i++) {
-            j = s->scantable.permutated[i];
-            s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
-        }
-
-        //XXX FIXME finetune, and perhaps add dc too
-        s->qscale[index]= FFMAX(
-            s->quant_matrixes[index][s->scantable.permutated[1]],
-            s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
-        av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n", index, s->qscale[index]);
-        len -= 65;
-    }
-
-    return 0;
-}
-
-/* decode huffman tables and build VLC decoders */
-static int mjpeg_decode_dht(MJpegDecodeContext *s)
-{
-    int len, index, i, class, n, v, code_max;
-    uint8_t bits_table[17];
-    uint8_t val_table[256];
-
-    len = get_bits(&s->gb, 16) - 2;
-
-    while (len > 0) {
-        if (len < 17)
-            return -1;
-        class = get_bits(&s->gb, 4);
-        if (class >= 2)
-            return -1;
-        index = get_bits(&s->gb, 4);
-        if (index >= 4)
-            return -1;
-        n = 0;
-        for(i=1;i<=16;i++) {
-            bits_table[i] = get_bits(&s->gb, 8);
-            n += bits_table[i];
-        }
-        len -= 17;
-        if (len < n || n > 256)
-            return -1;
-
-        code_max = 0;
-        for(i=0;i<n;i++) {
-            v = get_bits(&s->gb, 8);
-            if (v > code_max)
-                code_max = v;
-            val_table[i] = v;
-        }
-        len -= n;
-
-        /* build VLC and flush previous vlc if present */
-        free_vlc(&s->vlcs[class][index]);
-        av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
-               class, index, code_max + 1);
-        if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1, 0, class > 0) < 0){
-            return -1;
-        }
-    }
-    return 0;
-}
-
-static int mjpeg_decode_sof(MJpegDecodeContext *s)
-{
-    int len, nb_components, i, width, height, pix_fmt_id;
-
-    /* XXX: verify len field validity */
-    len = get_bits(&s->gb, 16);
-    s->bits= get_bits(&s->gb, 8);
-
-    if(s->pegasus_rct) s->bits=9;
-    if(s->bits==9 && !s->pegasus_rct) s->rct=1;    //FIXME ugly
-
-    if (s->bits != 8 && !s->lossless){
-        av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
-        return -1;
-    }
-
-    height = get_bits(&s->gb, 16);
-    width = get_bits(&s->gb, 16);
-
-    //HACK for odd_height.mov
-    if(s->interlaced && s->width == width && s->height == height + 1)
-        height= s->height;
-
-    av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
-    if(avcodec_check_dimensions(s->avctx, width, height))
-        return -1;
-
-    nb_components = get_bits(&s->gb, 8);
-    if (nb_components <= 0 ||
-        nb_components > MAX_COMPONENTS)
-        return -1;
-    if (s->ls && !(s->bits <= 8 || nb_components == 1)){
-        av_log(s->avctx, AV_LOG_ERROR, "only <= 8 bits/component or 16-bit gray accepted for JPEG-LS\n");
-        return -1;
-    }
-    s->nb_components = nb_components;
-    s->h_max = 1;
-    s->v_max = 1;
-    for(i=0;i<nb_components;i++) {
-        /* component id */
-        s->component_id[i] = get_bits(&s->gb, 8) - 1;
-        s->h_count[i] = get_bits(&s->gb, 4);
-        s->v_count[i] = get_bits(&s->gb, 4);
-        /* compute hmax and vmax (only used in interleaved case) */
-        if (s->h_count[i] > s->h_max)
-            s->h_max = s->h_count[i];
-        if (s->v_count[i] > s->v_max)
-            s->v_max = s->v_count[i];
-        s->quant_index[i] = get_bits(&s->gb, 8);
-        if (s->quant_index[i] >= 4)
-            return -1;
-        av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n", i, s->h_count[i],
-               s->v_count[i], s->component_id[i], s->quant_index[i]);
-    }
-
-    if(s->ls && (s->h_max > 1 || s->v_max > 1)) {
-        av_log(s->avctx, AV_LOG_ERROR, "Subsampling in JPEG-LS is not supported.\n");
-        return -1;
-    }
-
-    if(s->v_max==1 && s->h_max==1 && s->lossless==1) s->rgb=1;
-
-    /* if different size, realloc/alloc picture */
-    /* XXX: also check h_count and v_count */
-    if (width != s->width || height != s->height) {
-        av_freep(&s->qscale_table);
-
-        s->width = width;
-        s->height = height;
-        s->interlaced = 0;
-
-        /* test interlaced mode */
-        if (s->first_picture &&
-            s->org_height != 0 &&
-            s->height < ((s->org_height * 3) / 4)) {
-            s->interlaced = 1;
-            s->bottom_field = s->interlace_polarity;
-            s->picture.interlaced_frame = 1;
-            s->picture.top_field_first = !s->interlace_polarity;
-            height *= 2;
-        }
-
-        avcodec_set_dimensions(s->avctx, width, height);
-
-        s->qscale_table= av_mallocz((s->width+15)/16);
-
-        s->first_picture = 0;
-    }
-
-    if(s->interlaced && (s->bottom_field == !s->interlace_polarity))
-        return 0;
-
-    /* XXX: not complete test ! */
-    pix_fmt_id = (s->h_count[0] << 20) | (s->v_count[0] << 16) |
-                 (s->h_count[1] << 12) | (s->v_count[1] <<  8) |
-                 (s->h_count[2] <<  4) |  s->v_count[2];
-    av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
-    switch(pix_fmt_id){
-    case 0x222222:
-    case 0x111111:
-        if(s->rgb){
-            s->avctx->pix_fmt = PIX_FMT_RGB32;
-        }else if(s->nb_components==3)
-            s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
-        else
-            s->avctx->pix_fmt = PIX_FMT_GRAY8;
-        break;
-    case 0x211111:
-    case 0x221212:
-        s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
-        break;
-    default:
-    case 0x221111:
-        s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
-        break;
-    }
-    if(s->ls){
-        if(s->nb_components > 1)
-            s->avctx->pix_fmt = PIX_FMT_RGB24;
-        else if(s->bits <= 8)
-            s->avctx->pix_fmt = PIX_FMT_GRAY8;
-        else
-            s->avctx->pix_fmt = PIX_FMT_GRAY16;
-    }
-
-    if(s->picture.data[0])
-        s->avctx->release_buffer(s->avctx, &s->picture);
-
-    s->picture.reference= 0;
-    if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
-        av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
-        return -1;
-    }
-    s->picture.pict_type= I_TYPE;
-    s->picture.key_frame= 1;
-
-    for(i=0; i<3; i++){
-        s->linesize[i]= s->picture.linesize[i] << s->interlaced;
-    }
-
-//    printf("%d %d %d %d %d %d\n", s->width, s->height, s->linesize[0], s->linesize[1], s->interlaced, s->avctx->height);
-
-    if (len != (8+(3*nb_components)))
-    {
-        av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
-    }
-
-    /* totally blank picture as progressive JPEG will only add details to it */
-    if(s->progressive){
-        memset(s->picture.data[0], 0, s->picture.linesize[0] * s->height);
-        memset(s->picture.data[1], 0, s->picture.linesize[1] * s->height >> (s->v_max - s->v_count[1]));
-        memset(s->picture.data[2], 0, s->picture.linesize[2] * s->height >> (s->v_max - s->v_count[2]));
-    }
-    return 0;
-}
-
-static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
-{
-    int code;
-    code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
-    if (code < 0)
-    {
-        av_log(s->avctx, AV_LOG_WARNING, "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index,
-               &s->vlcs[0][dc_index]);
-        return 0xffff;
-    }
-
-    if(code)
-        return get_xbits(&s->gb, code);
-    else
-        return 0;
-}
-
-/* decode block and dequantize */
-static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
-                        int component, int dc_index, int ac_index, int16_t *quant_matrix)
-{
-    int code, i, j, level, val;
-
-    /* DC coef */
-    val = mjpeg_decode_dc(s, dc_index);
-    if (val == 0xffff) {
-        av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
-        return -1;
-    }
-    val = val * quant_matrix[0] + s->last_dc[component];
-    s->last_dc[component] = val;
-    block[0] = val;
-    /* AC coefs */
-    i = 0;
-    {OPEN_READER(re, &s->gb)
-    for(;;) {
-        UPDATE_CACHE(re, &s->gb);
-        GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
-
-        /* EOB */
-        if (code == 0x10)
-            break;
-        i += ((unsigned)code) >> 4;
-        if(code != 0x100){
-            code &= 0xf;
-            if(code > MIN_CACHE_BITS - 16){
-                UPDATE_CACHE(re, &s->gb)
-            }
-            {
-                int cache=GET_CACHE(re,&s->gb);
-                int sign=(~cache)>>31;
-                level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
-            }
-
-            LAST_SKIP_BITS(re, &s->gb, code)
-
-            if (i >= 63) {
-                if(i == 63){
-                    j = s->scantable.permutated[63];
-                    block[j] = level * quant_matrix[j];
-                    break;
-                }
-                av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
-                return -1;
-            }
-            j = s->scantable.permutated[i];
-            block[j] = level * quant_matrix[j];
-        }
-    }
-    CLOSE_READER(re, &s->gb)}
-
-    return 0;
-}
-
-/* decode block and dequantize - progressive JPEG version */
-static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block,
-                        int component, int dc_index, int ac_index, int16_t *quant_matrix,
-                        int ss, int se, int Ah, int Al, int *EOBRUN)
-{
-    int code, i, j, level, val, run;
-
-    /* DC coef */
-    if(!ss){
-        val = mjpeg_decode_dc(s, dc_index);
-        if (val == 0xffff) {
-            av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
-            return -1;
-        }
-        val = (val * quant_matrix[0] << Al) + s->last_dc[component];
-    }else
-        val = 0;
-    s->last_dc[component] = val;
-    block[0] = val;
-    if(!se) return 0;
-    /* AC coefs */
-    if(*EOBRUN){
-        (*EOBRUN)--;
-        return 0;
-    }
-    {OPEN_READER(re, &s->gb)
-    for(i=ss;;i++) {
-        UPDATE_CACHE(re, &s->gb);
-        GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
-        /* Progressive JPEG use AC coeffs from zero and this decoder sets offset 16 by default */
-        code -= 16;
-        if(code & 0xF) {
-            i += ((unsigned) code) >> 4;
-            code &= 0xf;
-            if(code > MIN_CACHE_BITS - 16){
-                UPDATE_CACHE(re, &s->gb)
-            }
-            {
-                int cache=GET_CACHE(re,&s->gb);
-                int sign=(~cache)>>31;
-                level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
-            }
-
-            LAST_SKIP_BITS(re, &s->gb, code)
-
-            if (i >= se) {
-                if(i == se){
-                    j = s->scantable.permutated[se];
-                    block[j] = level * quant_matrix[j] << Al;
-                    break;
-                }
-                av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
-                return -1;
-            }
-            j = s->scantable.permutated[i];
-            block[j] = level * quant_matrix[j] << Al;
-        }else{
-            run = ((unsigned) code) >> 4;
-            if(run == 0xF){// ZRL - skip 15 coefficients
-                i += 15;
-            }else{
-                val = run;
-                run = (1 << run);
-                UPDATE_CACHE(re, &s->gb);
-                run += (GET_CACHE(re, &s->gb) >> (32 - val)) & (run - 1);
-                if(val)
-                    LAST_SKIP_BITS(re, &s->gb, val);
-                *EOBRUN = run - 1;
-                break;
-            }
-        }
-    }
-    CLOSE_READER(re, &s->gb)}
-
-    return 0;
-}
-
-static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){
-    int i, mb_x, mb_y;
-    uint16_t buffer[32768][4];
-    int left[3], top[3], topleft[3];
-    const int linesize= s->linesize[0];
-    const int mask= (1<<s->bits)-1;
-
-    if((unsigned)s->mb_width > 32768) //dynamic alloc
-        return -1;
-
-    for(i=0; i<3; i++){
-        buffer[0][i]= 1 << (s->bits + point_transform - 1);
-    }
-    for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
-        const int modified_predictor= mb_y ? predictor : 1;
-        uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
-
-        if (s->interlaced && s->bottom_field)
-            ptr += linesize >> 1;
-
-        for(i=0; i<3; i++){
-            top[i]= left[i]= topleft[i]= buffer[0][i];
-        }
-        for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
-            if (s->restart_interval && !s->restart_count)
-                s->restart_count = s->restart_interval;
-
-            for(i=0;i<3;i++) {
-                int pred;
-
-                topleft[i]= top[i];
-                top[i]= buffer[mb_x][i];
-
-                PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
-
-                left[i]=
-                buffer[mb_x][i]= mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
-            }
-
-            if (s->restart_interval && !--s->restart_count) {
-                align_get_bits(&s->gb);
-                skip_bits(&s->gb, 16); /* skip RSTn */
-            }
-        }
-
-        if(s->rct){
-            for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
-                ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200)>>2);
-                ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
-                ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
-            }
-        }else if(s->pegasus_rct){
-            for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
-                ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2])>>2);
-                ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
-                ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
-            }
-        }else{
-            for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
-                ptr[4*mb_x+0] = buffer[mb_x][0];
-                ptr[4*mb_x+1] = buffer[mb_x][1];
-                ptr[4*mb_x+2] = buffer[mb_x][2];
-            }
-        }
-    }
-    return 0;
-}
-
-static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){
-    int i, mb_x, mb_y;
-    const int nb_components=3;
-
-    for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
-        for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
-            if (s->restart_interval && !s->restart_count)
-                s->restart_count = s->restart_interval;
-
-            if(mb_x==0 || mb_y==0 || s->interlaced){
-                for(i=0;i<nb_components;i++) {
-                    uint8_t *ptr;
-                    int n, h, v, x, y, c, j, linesize;
-                    n = s->nb_blocks[i];
-                    c = s->comp_index[i];
-                    h = s->h_scount[i];
-                    v = s->v_scount[i];
-                    x = 0;
-                    y = 0;
-                    linesize= s->linesize[c];
-
-                    for(j=0; j<n; j++) {
-                        int pred;
-
-                        ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
-                        if(y==0 && mb_y==0){
-                            if(x==0 && mb_x==0){
-                                pred= 128 << point_transform;
-                            }else{
-                                pred= ptr[-1];
-                            }
-                        }else{
-                            if(x==0 && mb_x==0){
-                                pred= ptr[-linesize];
-                            }else{
-                                PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
-                            }
-                        }
-
-                        if (s->interlaced && s->bottom_field)
-                            ptr += linesize >> 1;
-                        *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
-
-                        if (++x == h) {
-                            x = 0;
-                            y++;
-                        }
-                    }
-                }
-            }else{
-                for(i=0;i<nb_components;i++) {
-                    uint8_t *ptr;
-                    int n, h, v, x, y, c, j, linesize;
-                    n = s->nb_blocks[i];
-                    c = s->comp_index[i];
-                    h = s->h_scount[i];
-                    v = s->v_scount[i];
-                    x = 0;
-                    y = 0;
-                    linesize= s->linesize[c];
-
-                    for(j=0; j<n; j++) {
-                        int pred;
-
-                        ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
-                        PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
-                        *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
-                        if (++x == h) {
-                            x = 0;
-                            y++;
-                        }
-                    }
-                }
-            }
-            if (s->restart_interval && !--s->restart_count) {
-                align_get_bits(&s->gb);
-                skip_bits(&s->gb, 16); /* skip RSTn */
-            }
-        }
-    }
-    return 0;
-}
-
-static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int ss, int se, int Ah, int Al){
-    int i, mb_x, mb_y;
-    int EOBRUN = 0;
-
-    if(Ah) return 0; /* TODO decode refinement planes too */
-    for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
-        for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
-            if (s->restart_interval && !s->restart_count)
-                s->restart_count = s->restart_interval;
-
-            for(i=0;i<nb_components;i++) {
-                uint8_t *ptr;
-                int n, h, v, x, y, c, j;
-                n = s->nb_blocks[i];
-                c = s->comp_index[i];
-                h = s->h_scount[i];
-                v = s->v_scount[i];
-                x = 0;
-                y = 0;
-                for(j=0;j<n;j++) {
-                    memset(s->block, 0, sizeof(s->block));
-                    if (!s->progressive && decode_block(s, s->block, i,
-                                     s->dc_index[i], s->ac_index[i],
-                                     s->quant_matrixes[ s->quant_index[c] ]) < 0) {
-                        av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
-                        return -1;
-                    }
-                    if (s->progressive && decode_block_progressive(s, s->block, i,
-                                     s->dc_index[i], s->ac_index[i],
-                                     s->quant_matrixes[ s->quant_index[c] ], ss, se, Ah, Al, &EOBRUN) < 0) {
-                        av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
-                        return -1;
-                    }
-//                    av_log(s->avctx, AV_LOG_DEBUG, "mb: %d %d processed\n", mb_y, mb_x);
-                    ptr = s->picture.data[c] +
-                        (((s->linesize[c] * (v * mb_y + y) * 8) +
-                        (h * mb_x + x) * 8) >> s->avctx->lowres);
-                    if (s->interlaced && s->bottom_field)
-                        ptr += s->linesize[c] >> 1;
-//av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d %d %d %d %d \n", mb_x, mb_y, x, y, c, s->bottom_field, (v * mb_y + y) * 8, (h * mb_x + x) * 8);
-                    if(!s->progressive)
-                        s->dsp.idct_put(ptr, s->linesize[c], s->block);
-                    else
-                        s->dsp.idct_add(ptr, s->linesize[c], s->block);
-                    if (++x == h) {
-                        x = 0;
-                        y++;
-                    }
-                }
-            }
-            /* (< 1350) buggy workaround for Spectralfan.mov, should be fixed */
-            if (s->restart_interval && (s->restart_interval < 1350) &&
-                !--s->restart_count) {
-                align_get_bits(&s->gb);
-                skip_bits(&s->gb, 16); /* skip RSTn */
-                for (i=0; i<nb_components; i++) /* reset dc */
-                    s->last_dc[i] = 1024;
-            }
-        }
-    }
-    return 0;
-}
-
-static int mjpeg_decode_sos(MJpegDecodeContext *s)
-{
-    int len, nb_components, i, h, v, predictor, point_transform;
-    int vmax, hmax, index, id;
-    const int block_size= s->lossless ? 1 : 8;
-    int ilv, prev_shift;
-
-    /* XXX: verify len field validity */
-    len = get_bits(&s->gb, 16);
-    nb_components = get_bits(&s->gb, 8);
-    if (len != 6+2*nb_components)
-    {
-        av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
-        return -1;
-    }
-    vmax = 0;
-    hmax = 0;
-    for(i=0;i<nb_components;i++) {
-        id = get_bits(&s->gb, 8) - 1;
-        av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
-        /* find component index */
-        for(index=0;index<s->nb_components;index++)
-            if (id == s->component_id[index])
-                break;
-        if (index == s->nb_components)
-        {
-            av_log(s->avctx, AV_LOG_ERROR, "decode_sos: index(%d) out of components\n", index);
-            return -1;
-        }
-
-        s->comp_index[i] = index;
-
-        s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
-        s->h_scount[i] = s->h_count[index];
-        s->v_scount[i] = s->v_count[index];
-
-        s->dc_index[i] = get_bits(&s->gb, 4);
-        s->ac_index[i] = get_bits(&s->gb, 4);
-
-        if (s->dc_index[i] <  0 || s->ac_index[i] < 0 ||
-            s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
-            goto out_of_range;
-#if 0 //buggy
-        switch(s->start_code)
-        {
-            case SOF0:
-                if (dc_index[i] > 1 || ac_index[i] > 1)
-                    goto out_of_range;
-                break;
-            case SOF1:
-            case SOF2:
-                if (dc_index[i] > 3 || ac_index[i] > 3)
-                    goto out_of_range;
-                break;
-            case SOF3:
-                if (dc_index[i] > 3 || ac_index[i] != 0)
-                    goto out_of_range;
-                break;
-        }
-#endif
-    }
-
-    predictor= get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
-    ilv= get_bits(&s->gb, 8);    /* JPEG Se / JPEG-LS ILV */
-    prev_shift = get_bits(&s->gb, 4); /* Ah */
-    point_transform= get_bits(&s->gb, 4); /* Al */
-
-    for(i=0;i<nb_components;i++)
-        s->last_dc[i] = 1024;
-
-    if (nb_components > 1) {
-        /* interleaved stream */
-        s->mb_width  = (s->width  + s->h_max * block_size - 1) / (s->h_max * block_size);
-        s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
-    } else if(!s->ls) { /* skip this for JPEG-LS */
-        h = s->h_max / s->h_scount[0];
-        v = s->v_max / s->v_scount[0];
-        s->mb_width  = (s->width  + h * block_size - 1) / (h * block_size);
-        s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
-        s->nb_blocks[0] = 1;
-        s->h_scount[0] = 1;
-        s->v_scount[0] = 1;
-    }
-
-    if(s->avctx->debug & FF_DEBUG_PICT_INFO)
-        av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n", s->lossless ? "lossless" : "sequencial DCT", s->rgb ? "RGB" : "",
-               predictor, point_transform, ilv, s->bits,
-               s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
-
-
-    /* mjpeg-b can have padding bytes between sos and image data, skip them */
-    for (i = s->mjpb_skiptosod; i > 0; i--)
-        skip_bits(&s->gb, 8);
-
-    if(s->lossless){
-        if(s->ls){
-//            for(){
-//            reset_ls_coding_parameters(s, 0);
-
-            ff_jpegls_decode_picture(s, predictor, point_transform, ilv);
-        }else{
-            if(s->rgb){
-                if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
-                    return -1;
-            }else{
-                if(ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
-                    return -1;
-            }
-        }
-    }else{
-        if(mjpeg_decode_scan(s, nb_components, predictor, ilv, prev_shift, point_transform) < 0)
-            return -1;
-    }
-    emms_c();
-    return 0;
- out_of_range:
-    av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
-    return -1;
-}
-
-static int mjpeg_decode_dri(MJpegDecodeContext *s)
-{
-    if (get_bits(&s->gb, 16) != 4)
-        return -1;
-    s->restart_interval = get_bits(&s->gb, 16);
-    s->restart_count = 0;
-    av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n", s->restart_interval);
-
-    return 0;
-}
-
-static int mjpeg_decode_app(MJpegDecodeContext *s)
-{
-    int len, id, i;
-
-    len = get_bits(&s->gb, 16);
-    if (len < 5)
-        return -1;
-    if(8*len + get_bits_count(&s->gb) > s->gb.size_in_bits)
-        return -1;
-
-    id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
-    id = be2me_32(id);
-    len -= 6;
-
-    if(s->avctx->debug & FF_DEBUG_STARTCODE){
-        av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
-    }
-
-    /* buggy AVID, it puts EOI only at every 10th frame */
-    /* also this fourcc is used by non-avid files too, it holds some
-       informations, but it's always present in AVID creates files */
-    if (id == ff_get_fourcc("AVI1"))
-    {
-        /* structure:
-            4bytes      AVI1
-            1bytes      polarity
-            1bytes      always zero
-            4bytes      field_size
-            4bytes      field_size_less_padding
-        */
-            s->buggy_avid = 1;
-//        if (s->first_picture)
-//            printf("mjpeg: workarounding buggy AVID\n");
-        i = get_bits(&s->gb, 8);
-        if     (i==2) s->bottom_field= 1;
-        else if(i==1) s->bottom_field= 0;
-#if 0
-        skip_bits(&s->gb, 8);
-        skip_bits(&s->gb, 32);
-        skip_bits(&s->gb, 32);
-        len -= 10;
-#endif
-//        if (s->interlace_polarity)
-//            printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
-        goto out;
-    }
-
-//    len -= 2;
-
-    if (id == ff_get_fourcc("JFIF"))
-    {
-        int t_w, t_h, v1, v2;
-        skip_bits(&s->gb, 8); /* the trailing zero-byte */
-        v1= get_bits(&s->gb, 8);
-        v2= get_bits(&s->gb, 8);
-        skip_bits(&s->gb, 8);
-
-        s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 16);
-        s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 16);
-
-        if (s->avctx->debug & FF_DEBUG_PICT_INFO)
-            av_log(s->avctx, AV_LOG_INFO, "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
-                v1, v2,
-                s->avctx->sample_aspect_ratio.num,
-                s->avctx->sample_aspect_ratio.den
-            );
-
-        t_w = get_bits(&s->gb, 8);
-        t_h = get_bits(&s->gb, 8);
-        if (t_w && t_h)
-        {
-            /* skip thumbnail */
-            if (len-10-(t_w*t_h*3) > 0)
-                len -= t_w*t_h*3;
-        }
-        len -= 10;
-        goto out;
-    }
-
-    if (id == ff_get_fourcc("Adob") && (get_bits(&s->gb, 8) == 'e'))
-    {
-        if (s->avctx->debug & FF_DEBUG_PICT_INFO)
-            av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
-        skip_bits(&s->gb, 16); /* version */
-        skip_bits(&s->gb, 16); /* flags0 */
-        skip_bits(&s->gb, 16); /* flags1 */
-        skip_bits(&s->gb, 8);  /* transform */
-        len -= 7;
-        goto out;
-    }
-
-    if (id == ff_get_fourcc("LJIF")){
-        if (s->avctx->debug & FF_DEBUG_PICT_INFO)
-            av_log(s->avctx, AV_LOG_INFO, "Pegasus lossless jpeg header found\n");
-        skip_bits(&s->gb, 16); /* version ? */
-        skip_bits(&s->gb, 16); /* unknwon always 0? */
-        skip_bits(&s->gb, 16); /* unknwon always 0? */
-        skip_bits(&s->gb, 16); /* unknwon always 0? */
-        switch( get_bits(&s->gb, 8)){
-        case 1:
-            s->rgb= 1;
-            s->pegasus_rct=0;
-            break;
-        case 2:
-            s->rgb= 1;
-            s->pegasus_rct=1;
-            break;
-        default:
-            av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
-        }
-        len -= 9;
-        goto out;
-    }
-
-    /* Apple MJPEG-A */
-    if ((s->start_code == APP1) && (len > (0x28 - 8)))
-    {
-        id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
-        id = be2me_32(id);
-        len -= 4;
-        if (id == ff_get_fourcc("mjpg")) /* Apple MJPEG-A */
-        {
-#if 0
-            skip_bits(&s->gb, 32); /* field size */
-            skip_bits(&s->gb, 32); /* pad field size */
-            skip_bits(&s->gb, 32); /* next off */
-            skip_bits(&s->gb, 32); /* quant off */
-            skip_bits(&s->gb, 32); /* huff off */
-            skip_bits(&s->gb, 32); /* image off */
-            skip_bits(&s->gb, 32); /* scan off */
-            skip_bits(&s->gb, 32); /* data off */
-#endif
-            if (s->avctx->debug & FF_DEBUG_PICT_INFO)
-                av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
-        }
-    }
-
-out:
-    /* slow but needed for extreme adobe jpegs */
-    if (len < 0)
-        av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error, decode_app parser read over the end\n");
-    while(--len > 0)
-        skip_bits(&s->gb, 8);
-
-    return 0;
-}
-
-static int mjpeg_decode_com(MJpegDecodeContext *s)
-{
-    int len = get_bits(&s->gb, 16);
-    if (len >= 2 && 8*len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) {
-        char *cbuf = av_malloc(len - 1);
-        if (cbuf) {
-            int i;
-            for (i = 0; i < len - 2; i++)
-                cbuf[i] = get_bits(&s->gb, 8);
-            if (i > 0 && cbuf[i-1] == '\n')
-                cbuf[i-1] = 0;
-            else
-                cbuf[i] = 0;
-
-            if(s->avctx->debug & FF_DEBUG_PICT_INFO)
-                av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
-
-            /* buggy avid, it puts EOI only at every 10th frame */
-            if (!strcmp(cbuf, "AVID"))
-            {
-                s->buggy_avid = 1;
-                //        if (s->first_picture)
-                //            printf("mjpeg: workarounding buggy AVID\n");
-            }
-            else if(!strcmp(cbuf, "CS=ITU601")){
-                s->cs_itu601= 1;
-            }
-
-            av_free(cbuf);
-        }
-    }
-
-    return 0;
-}
-
-#if 0
-static int valid_marker_list[] =
-{
-        /* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f */
-/* 0 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* 1 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* 2 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* 3 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* 4 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* 5 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* 6 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* 7 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* 8 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* 9 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* a */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* b */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* c */    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-/* d */    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-/* e */    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-/* f */    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
-}
-#endif
-
-/* return the 8 bit start code value and update the search
-   state. Return -1 if no start code found */
-static int find_marker(uint8_t **pbuf_ptr, uint8_t *buf_end)
-{
-    uint8_t *buf_ptr;
-    unsigned int v, v2;
-    int val;
-#ifdef DEBUG
-    int skipped=0;
-#endif
-
-    buf_ptr = *pbuf_ptr;
-    while (buf_ptr < buf_end) {
-        v = *buf_ptr++;
-        v2 = *buf_ptr;
-        if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
-            val = *buf_ptr++;
-            goto found;
-        }
-#ifdef DEBUG
-        skipped++;
-#endif
-    }
-    val = -1;
-found:
-#ifdef DEBUG
-    av_log(NULL, AV_LOG_VERBOSE, "find_marker skipped %d bytes\n", skipped);
-#endif
-    *pbuf_ptr = buf_ptr;
-    return val;
-}
-
-static int mjpeg_decode_frame(AVCodecContext *avctx,
-                              void *data, int *data_size,
-                              uint8_t *buf, int buf_size)
-{
-    MJpegDecodeContext *s = avctx->priv_data;
-    uint8_t *buf_end, *buf_ptr;
-    int start_code;
-    AVFrame *picture = data;
-
-    buf_ptr = buf;
-    buf_end = buf + buf_size;
-    while (buf_ptr < buf_end) {
-        /* find start next marker */
-        start_code = find_marker(&buf_ptr, buf_end);
-        {
-            /* EOF */
-            if (start_code < 0) {
-                goto the_end;
-            } else {
-                av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%d\n", start_code, buf_end - buf_ptr);
-
-                if ((buf_end - buf_ptr) > s->buffer_size)
-                {
-                    av_free(s->buffer);
-                    s->buffer_size = buf_end-buf_ptr;
-                    s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE);
-                    av_log(avctx, AV_LOG_DEBUG, "buffer too small, expanding to %d bytes\n",
-                        s->buffer_size);
-                }
-
-                /* unescape buffer of SOS, use special treatment for JPEG-LS */
-                if (start_code == SOS && !s->ls)
-                {
-                    uint8_t *src = buf_ptr;
-                    uint8_t *dst = s->buffer;
-
-                    while (src<buf_end)
-                    {
-                        uint8_t x = *(src++);
-
-                        *(dst++) = x;
-                        if (avctx->codec_id != CODEC_ID_THP)
-                        {
-                            if (x == 0xff) {
-                                while (src < buf_end && x == 0xff)
-                                    x = *(src++);
-
-                                if (x >= 0xd0 && x <= 0xd7)
-                                    *(dst++) = x;
-                                else if (x)
-                                    break;
-                            }
-                        }
-                    }
-                    init_get_bits(&s->gb, s->buffer, (dst - s->buffer)*8);
-
-                    av_log(avctx, AV_LOG_DEBUG, "escaping removed %d bytes\n",
-                           (buf_end - buf_ptr) - (dst - s->buffer));
-                }
-                else if(start_code == SOS && s->ls){
-                    uint8_t *src = buf_ptr;
-                    uint8_t *dst = s->buffer;
-                    int bit_count = 0;
-                    int t = 0, b = 0;
-                    PutBitContext pb;
-
-                    s->cur_scan++;
-
-                    /* find marker */
-                    while (src + t < buf_end){
-                        uint8_t x = src[t++];
-                        if (x == 0xff){
-                            while((src + t < buf_end) && x == 0xff)
-                                x = src[t++];
-                            if (x & 0x80) {
-                                t -= 2;
-                                break;
-                            }
-                        }
-                    }
-                    bit_count = t * 8;
-
-                    init_put_bits(&pb, dst, t);
-
-                    /* unescape bitstream */
-                    while(b < t){
-                        uint8_t x = src[b++];
-                        put_bits(&pb, 8, x);
-                        if(x == 0xFF){
-                            x = src[b++];
-                            put_bits(&pb, 7, x);
-                            bit_count--;
-                        }
-                    }
-                    flush_put_bits(&pb);
-
-                    init_get_bits(&s->gb, dst, bit_count);
-                }
-                else
-                    init_get_bits(&s->gb, buf_ptr, (buf_end - buf_ptr)*8);
-
-                s->start_code = start_code;
-                if(s->avctx->debug & FF_DEBUG_STARTCODE){
-                    av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
-                }
-
-                /* process markers */
-                if (start_code >= 0xd0 && start_code <= 0xd7) {
-                    av_log(avctx, AV_LOG_DEBUG, "restart marker: %d\n", start_code&0x0f);
-                    /* APP fields */
-                } else if (start_code >= APP0 && start_code <= APP15) {
-                    mjpeg_decode_app(s);
-                    /* Comment */
-                } else if (start_code == COM){
-                    mjpeg_decode_com(s);
-                }
-
-                switch(start_code) {
-                case SOI:
-                    s->restart_interval = 0;
-
-                    s->restart_count = 0;
-                    /* nothing to do on SOI */
-                    break;
-                case DQT:
-                    mjpeg_decode_dqt(s);
-                    break;
-                case DHT:
-                    if(mjpeg_decode_dht(s) < 0){
-                        av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
-                        return -1;
-                    }
-                    break;
-                case SOF0:
-                    s->lossless=0;
-                    s->ls=0;
-                    s->progressive=0;
-                    if (mjpeg_decode_sof(s) < 0)
-                        return -1;
-                    break;
-                case SOF2:
-                    s->lossless=0;
-                    s->ls=0;
-                    s->progressive=1;
-                    if (mjpeg_decode_sof(s) < 0)
-                        return -1;
-                    break;
-                case SOF3:
-                    s->lossless=1;
-                    s->ls=0;
-                    s->progressive=0;
-                    if (mjpeg_decode_sof(s) < 0)
-                        return -1;
-                    break;
-                case SOF48:
-                    s->lossless=1;
-                    s->ls=1;
-                    s->progressive=0;
-                    if (mjpeg_decode_sof(s) < 0)
-                        return -1;
-                    break;
-                case LSE:
-                    if (ff_jpegls_decode_lse(s) < 0)
-                        return -1;
-                    break;
-                case EOI:
-                    s->cur_scan = 0;
-                    if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
-                        break;
-eoi_parser:
-                    {
-                        if (s->interlaced) {
-                            s->bottom_field ^= 1;
-                            /* if not bottom field, do not output image yet */
-                            if (s->bottom_field == !s->interlace_polarity)
-                                goto not_the_end;
-                        }
-                        *picture = s->picture;
-                        *data_size = sizeof(AVFrame);
-
-                        if(!s->lossless){
-                            picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]);
-                            picture->qstride= 0;
-                            picture->qscale_table= s->qscale_table;
-                            memset(picture->qscale_table, picture->quality, (s->width+15)/16);
-                            if(avctx->debug & FF_DEBUG_QP)
-                                av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
-                            picture->quality*= FF_QP2LAMBDA;
-                        }
-
-                        goto the_end;
-                    }
-                    break;
-                case SOS:
-                    mjpeg_decode_sos(s);
-                    /* buggy avid puts EOI every 10-20th frame */
-                    /* if restart period is over process EOI */
-                    if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
-                        goto eoi_parser;
-                    break;
-                case DRI:
-                    mjpeg_decode_dri(s);
-                    break;
-                case SOF1:
-                case SOF5:
-                case SOF6:
-                case SOF7:
-                case SOF9:
-                case SOF10:
-                case SOF11:
-                case SOF13:
-                case SOF14:
-                case SOF15:
-                case JPG:
-                    av_log(avctx, AV_LOG_ERROR, "mjpeg: unsupported coding type (%x)\n", start_code);
-                    break;
-//                default:
-//                    printf("mjpeg: unsupported marker (%x)\n", start_code);
-//                    break;
-                }
-
-not_the_end:
-                /* eof process start code */
-                buf_ptr += (get_bits_count(&s->gb)+7)/8;
-                av_log(avctx, AV_LOG_DEBUG, "marker parser used %d bytes (%d bits)\n",
-                       (get_bits_count(&s->gb)+7)/8, get_bits_count(&s->gb));
-            }
-        }
-    }
-the_end:
-    av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %d bytes\n", buf_end - buf_ptr);
-//    return buf_end - buf_ptr;
-    return buf_ptr - buf;
-}
-
-static int mjpegb_decode_frame(AVCodecContext *avctx,
-                              void *data, int *data_size,
-                              uint8_t *buf, int buf_size)
-{
-    MJpegDecodeContext *s = avctx->priv_data;
-    uint8_t *buf_end, *buf_ptr;
-    AVFrame *picture = data;
-    GetBitContext hgb; /* for the header */
-    uint32_t dqt_offs, dht_offs, sof_offs, sos_offs, second_field_offs;
-    uint32_t field_size, sod_offs;
-
-    buf_ptr = buf;
-    buf_end = buf + buf_size;
-
-read_header:
-    /* reset on every SOI */
-    s->restart_interval = 0;
-    s->restart_count = 0;
-    s->mjpb_skiptosod = 0;
-
-    init_get_bits(&hgb, buf_ptr, /*buf_size*/(buf_end - buf_ptr)*8);
-
-    skip_bits(&hgb, 32); /* reserved zeros */
-
-    if (get_bits_long(&hgb, 32) != MKBETAG('m','j','p','g'))
-    {
-        av_log(avctx, AV_LOG_WARNING, "not mjpeg-b (bad fourcc)\n");
-        return 0;
-    }
-
-    field_size = get_bits_long(&hgb, 32); /* field size */
-    av_log(avctx, AV_LOG_DEBUG, "field size: 0x%x\n", field_size);
-    skip_bits(&hgb, 32); /* padded field size */
-    second_field_offs = get_bits_long(&hgb, 32);
-    av_log(avctx, AV_LOG_DEBUG, "second field offs: 0x%x\n", second_field_offs);
-
-    dqt_offs = get_bits_long(&hgb, 32);
-    av_log(avctx, AV_LOG_DEBUG, "dqt offs: 0x%x\n", dqt_offs);
-    if (dqt_offs)
-    {
-        init_get_bits(&s->gb, buf+dqt_offs, (buf_end - (buf+dqt_offs))*8);
-        s->start_code = DQT;
-        mjpeg_decode_dqt(s);
-    }
-
-    dht_offs = get_bits_long(&hgb, 32);
-    av_log(avctx, AV_LOG_DEBUG, "dht offs: 0x%x\n", dht_offs);
-    if (dht_offs)
-    {
-        init_get_bits(&s->gb, buf+dht_offs, (buf_end - (buf+dht_offs))*8);
-        s->start_code = DHT;
-        mjpeg_decode_dht(s);
-    }
-
-    sof_offs = get_bits_long(&hgb, 32);
-    av_log(avctx, AV_LOG_DEBUG, "sof offs: 0x%x\n", sof_offs);
-    if (sof_offs)
-    {
-        init_get_bits(&s->gb, buf+sof_offs, (buf_end - (buf+sof_offs))*8);
-        s->start_code = SOF0;
-        if (mjpeg_decode_sof(s) < 0)
-            return -1;
-    }
-
-    sos_offs = get_bits_long(&hgb, 32);
-    av_log(avctx, AV_LOG_DEBUG, "sos offs: 0x%x\n", sos_offs);
-    sod_offs = get_bits_long(&hgb, 32);
-    av_log(avctx, AV_LOG_DEBUG, "sod offs: 0x%x\n", sod_offs);
-    if (sos_offs)
-    {
-//        init_get_bits(&s->gb, buf+sos_offs, (buf_end - (buf+sos_offs))*8);
-        init_get_bits(&s->gb, buf+sos_offs, field_size*8);
-        s->mjpb_skiptosod = (sod_offs - sos_offs - show_bits(&s->gb, 16));
-        s->start_code = SOS;
-        mjpeg_decode_sos(s);
-    }
-
-    if (s->interlaced) {
-        s->bottom_field ^= 1;
-        /* if not bottom field, do not output image yet */
-        if (s->bottom_field && second_field_offs)
-        {
-            buf_ptr = buf + second_field_offs;
-            second_field_offs = 0;
-            goto read_header;
-            }
-    }
-
-    //XXX FIXME factorize, this looks very similar to the EOI code
-
-    *picture= s->picture;
-    *data_size = sizeof(AVFrame);
-
-    if(!s->lossless){
-        picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]);
-        picture->qstride= 0;
-        picture->qscale_table= s->qscale_table;
-        memset(picture->qscale_table, picture->quality, (s->width+15)/16);
-        if(avctx->debug & FF_DEBUG_QP)
-            av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
-        picture->quality*= FF_QP2LAMBDA;
-    }
-
-    return buf_ptr - buf;
-}
-
-#include "sp5x.h"
-
-static int sp5x_decode_frame(AVCodecContext *avctx,
-                              void *data, int *data_size,
-                              uint8_t *buf, int buf_size)
-{
-#if 0
-    MJpegDecodeContext *s = avctx->priv_data;
-#endif
-    const int qscale = 5;
-    uint8_t *buf_ptr, *buf_end, *recoded;
-    int i = 0, j = 0;
-
-    if (!avctx->width || !avctx->height)
-        return -1;
-
-    buf_ptr = buf;
-    buf_end = buf + buf_size;
-
-#if 1
-    recoded = av_mallocz(buf_size + 1024);
-    if (!recoded)
-        return -1;
-
-    /* SOI */
-    recoded[j++] = 0xFF;
-    recoded[j++] = 0xD8;
-
-    memcpy(recoded+j, &sp5x_data_dqt[0], sizeof(sp5x_data_dqt));
-    memcpy(recoded+j+5, &sp5x_quant_table[qscale * 2], 64);
-    memcpy(recoded+j+70, &sp5x_quant_table[(qscale * 2) + 1], 64);
-    j += sizeof(sp5x_data_dqt);
-
-    memcpy(recoded+j, &sp5x_data_dht[0], sizeof(sp5x_data_dht));
-    j += sizeof(sp5x_data_dht);
-
-    memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof));
-    recoded[j+5] = (avctx->coded_height >> 8) & 0xFF;
-    recoded[j+6] = avctx->coded_height & 0xFF;
-    recoded[j+7] = (avctx->coded_width >> 8) & 0xFF;
-    recoded[j+8] = avctx->coded_width & 0xFF;
-    j += sizeof(sp5x_data_sof);
-
-    memcpy(recoded+j, &sp5x_data_sos[0], sizeof(sp5x_data_sos));
-    j += sizeof(sp5x_data_sos);
-
-    for (i = 14; i < buf_size && j < buf_size+1024-2; i++)
-    {
-        recoded[j++] = buf[i];
-        if (buf[i] == 0xff)
-            recoded[j++] = 0;
-    }
-
-    /* EOI */
-    recoded[j++] = 0xFF;
-    recoded[j++] = 0xD9;
-
-    i = mjpeg_decode_frame(avctx, data, data_size, recoded, j);
-
-    av_free(recoded);
-
-#else
-    /* SOF */
-    s->bits = 8;
-    s->width  = avctx->coded_width;
-    s->height = avctx->coded_height;
-    s->nb_components = 3;
-    s->component_id[0] = 0;
-    s->h_count[0] = 2;
-    s->v_count[0] = 2;
-    s->quant_index[0] = 0;
-    s->component_id[1] = 1;
-    s->h_count[1] = 1;
-    s->v_count[1] = 1;
-    s->quant_index[1] = 1;
-    s->component_id[2] = 2;
-    s->h_count[2] = 1;
-    s->v_count[2] = 1;
-    s->quant_index[2] = 1;
-    s->h_max = 2;
-    s->v_max = 2;
-
-    s->qscale_table = av_mallocz((s->width+15)/16);
-    avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420;
-    s->interlaced = 0;
-
-    s->picture.reference = 0;
-    if (avctx->get_buffer(avctx, &s->picture) < 0)
-    {
-        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
-        return -1;
-    }
-
-    s->picture.pict_type = I_TYPE;
-    s->picture.key_frame = 1;
-
-    for (i = 0; i < 3; i++)
-        s->linesize[i] = s->picture.linesize[i] << s->interlaced;
-
-    /* DQT */
-    for (i = 0; i < 64; i++)
-    {
-        j = s->scantable.permutated[i];
-        s->quant_matrixes[0][j] = sp5x_quant_table[(qscale * 2) + i];
-    }
-    s->qscale[0] = FFMAX(
-        s->quant_matrixes[0][s->scantable.permutated[1]],
-        s->quant_matrixes[0][s->scantable.permutated[8]]) >> 1;
-
-    for (i = 0; i < 64; i++)
-    {
-        j = s->scantable.permutated[i];
-        s->quant_matrixes[1][j] = sp5x_quant_table[(qscale * 2) + 1 + i];
-    }
-    s->qscale[1] = FFMAX(
-        s->quant_matrixes[1][s->scantable.permutated[1]],
-        s->quant_matrixes[1][s->scantable.permutated[8]]) >> 1;
-
-    /* DHT */
-
-    /* SOS */
-    s->comp_index[0] = 0;
-    s->nb_blocks[0] = s->h_count[0] * s->v_count[0];
-    s->h_scount[0] = s->h_count[0];
-    s->v_scount[0] = s->v_count[0];
-    s->dc_index[0] = 0;
-    s->ac_index[0] = 0;
-
-    s->comp_index[1] = 1;
-    s->nb_blocks[1] = s->h_count[1] * s->v_count[1];
-    s->h_scount[1] = s->h_count[1];
-    s->v_scount[1] = s->v_count[1];
-    s->dc_index[1] = 1;
-    s->ac_index[1] = 1;
-
-    s->comp_index[2] = 2;
-    s->nb_blocks[2] = s->h_count[2] * s->v_count[2];
-    s->h_scount[2] = s->h_count[2];
-    s->v_scount[2] = s->v_count[2];
-    s->dc_index[2] = 1;
-    s->ac_index[2] = 1;
-
-    for (i = 0; i < 3; i++)
-        s->last_dc[i] = 1024;
-
-    s->mb_width = (s->width * s->h_max * 8 -1) / (s->h_max * 8);
-    s->mb_height = (s->height * s->v_max * 8 -1) / (s->v_max * 8);
-
-    init_get_bits(&s->gb, buf+14, (buf_size-14)*8);
-
-    return mjpeg_decode_scan(s);
-#endif
-
-    return i;
-}
-
-static int mjpeg_decode_end(AVCodecContext *avctx)
-{
-    MJpegDecodeContext *s = avctx->priv_data;
-    int i, j;
-
-    av_free(s->buffer);
-    av_free(s->qscale_table);
-
-    for(i=0;i<2;i++) {
-        for(j=0;j<4;j++)
-            free_vlc(&s->vlcs[i][j]);
-    }
-    return 0;
-}
-
-static int mjpega_dump_header(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
-                              uint8_t **poutbuf, int *poutbuf_size,
-                              const uint8_t *buf, int buf_size, int keyframe)
-{
-    uint8_t *poutbufp;
-    int i;
-
-    if (avctx->codec_id != CODEC_ID_MJPEG) {
-        av_log(avctx, AV_LOG_ERROR, "mjpega bitstream filter only applies to mjpeg codec\n");
-        return 0;
-    }
-
-    *poutbuf_size = 0;
-    *poutbuf = av_malloc(buf_size + 44 + FF_INPUT_BUFFER_PADDING_SIZE);
-    poutbufp = *poutbuf;
-    bytestream_put_byte(&poutbufp, 0xff);
-    bytestream_put_byte(&poutbufp, SOI);
-    bytestream_put_byte(&poutbufp, 0xff);
-    bytestream_put_byte(&poutbufp, APP1);
-    bytestream_put_be16(&poutbufp, 42); /* size */
-    bytestream_put_be32(&poutbufp, 0);
-    bytestream_put_buffer(&poutbufp, "mjpg", 4);
-    bytestream_put_be32(&poutbufp, buf_size + 44); /* field size */
-    bytestream_put_be32(&poutbufp, buf_size + 44); /* pad field size */
-    bytestream_put_be32(&poutbufp, 0);             /* next ptr */
-
-    for (i = 0; i < buf_size - 1; i++) {
-        if (buf[i] == 0xff) {
-            switch (buf[i + 1]) {
-            case DQT:  /* quant off */
-            case DHT:  /* huff  off */
-            case SOF0: /* image off */
-                bytestream_put_be32(&poutbufp, i + 46);
-                break;
-            case SOS:
-                bytestream_put_be32(&poutbufp, i + 46); /* scan off */
-                bytestream_put_be32(&poutbufp, i + 46 + AV_RB16(buf + i + 2)); /* data off */
-                bytestream_put_buffer(&poutbufp, buf + 2, buf_size - 2); /* skip already written SOI */
-                *poutbuf_size = poutbufp - *poutbuf;
-                return 1;
-            case APP1:
-                if (i + 8 < buf_size && AV_RL32(buf + i + 8) == ff_get_fourcc("mjpg")) {
-                    av_log(avctx, AV_LOG_ERROR, "bitstream already formatted\n");
-                    memcpy(*poutbuf, buf, buf_size);
-                    *poutbuf_size = buf_size;
-                    return 1;
-                }
-            }
-        }
-    }
-    av_freep(poutbuf);
-    av_log(avctx, AV_LOG_ERROR, "could not find SOS marker in bitstream\n");
-    return 0;
-}
-
-AVCodec mjpeg_decoder = {
-    "mjpeg",
-    CODEC_TYPE_VIDEO,
-    CODEC_ID_MJPEG,
-    sizeof(MJpegDecodeContext),
-    mjpeg_decode_init,
-    NULL,
-    mjpeg_decode_end,
-    mjpeg_decode_frame,
-    CODEC_CAP_DR1,
-    NULL
-};
-
-AVCodec thp_decoder = {
-    "thp",
-    CODEC_TYPE_VIDEO,
-    CODEC_ID_THP,
-    sizeof(MJpegDecodeContext),
-    mjpeg_decode_init,
-    NULL,
-    mjpeg_decode_end,
-    mjpeg_decode_frame,
-    CODEC_CAP_DR1,
-    NULL
-};
-
-AVCodec mjpegb_decoder = {
-    "mjpegb",
-    CODEC_TYPE_VIDEO,
-    CODEC_ID_MJPEGB,
-    sizeof(MJpegDecodeContext),
-    mjpeg_decode_init,
-    NULL,
-    mjpeg_decode_end,
-    mjpegb_decode_frame,
-    CODEC_CAP_DR1,
-    NULL
-};
-
-AVCodec sp5x_decoder = {
-    "sp5x",
-    CODEC_TYPE_VIDEO,
-    CODEC_ID_SP5X,
-    sizeof(MJpegDecodeContext),
-    mjpeg_decode_init,
-    NULL,
-    mjpeg_decode_end,
-    sp5x_decode_frame,
-    CODEC_CAP_DR1,
-    NULL
-};
-
-#ifdef CONFIG_ENCODERS
-AVCodec ljpeg_encoder = { //FIXME avoid MPV_* lossless jpeg shouldnt need them
-    "ljpeg",
-    CODEC_TYPE_VIDEO,
-    CODEC_ID_LJPEG,
-    sizeof(MpegEncContext),
-    MPV_encode_init,
-    encode_picture_lossless,
-    MPV_encode_end,
-};
-#endif
-
-#ifdef CONFIG_MJPEGA_DUMP_HEADER_BSF
-AVBitStreamFilter mjpega_dump_header_bsf = {
-    "mjpegadump",
-    0,
-    mjpega_dump_header,
-};
-#endif
+/*
+ * MJPEG encoder and decoder
+ * Copyright (c) 2000, 2001 Fabrice Bellard.
+ * Copyright (c) 2003 Alex Beregszaszi
+ * Copyright (c) 2003-2004 Michael Niedermayer
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Support for external huffman table, various fixes (AVID workaround),
+ * aspecting, new decode_frame mechanism and apple mjpeg-b support
+ *                                  by Alex Beregszaszi
+ */
+
+/**
+ * @file mjpeg.c
+ * MJPEG encoder and decoder.
+ */
+
+#include "mjpeg.h"
+
+
+#if 0
+/* These are the sample quantization tables given in JPEG spec section K.1.
+ * The spec says that the values given produce "good" quality, and
+ * when divided by 2, "very good" quality.
+ */
+const unsigned char std_luminance_quant_tbl[64] = {
+    16,  11,  10,  16,  24,  40,  51,  61,
+    12,  12,  14,  19,  26,  58,  60,  55,
+    14,  13,  16,  24,  40,  57,  69,  56,
+    14,  17,  22,  29,  51,  87,  80,  62,
+    18,  22,  37,  56,  68, 109, 103,  77,
+    24,  35,  55,  64,  81, 104, 113,  92,
+    49,  64,  78,  87, 103, 121, 120, 101,
+    72,  92,  95,  98, 112, 100, 103,  99
+};
+const unsigned char std_chrominance_quant_tbl[64] = {
+    17,  18,  24,  47,  99,  99,  99,  99,
+    18,  21,  26,  66,  99,  99,  99,  99,
+    24,  26,  56,  99,  99,  99,  99,  99,
+    47,  66,  99,  99,  99,  99,  99,  99,
+    99,  99,  99,  99,  99,  99,  99,  99,
+    99,  99,  99,  99,  99,  99,  99,  99,
+    99,  99,  99,  99,  99,  99,  99,  99,
+    99,  99,  99,  99,  99,  99,  99,  99
+};
+#endif
+
+/* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
+/* IMPORTANT: these are only valid for 8-bit data precision! */
+const uint8_t bits_dc_luminance[17] =
+{ /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
+const uint8_t val_dc_luminance[] =
+{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
+
+const uint8_t bits_dc_chrominance[17] =
+{ /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
+const uint8_t val_dc_chrominance[] =
+{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
+
+const uint8_t bits_ac_luminance[17] =
+{ /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
+const uint8_t val_ac_luminance[] =
+{ 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
+  0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
+  0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
+  0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
+  0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
+  0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
+  0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
+  0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
+  0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
+  0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
+  0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
+  0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
+  0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
+  0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
+  0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
+  0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
+  0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
+  0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
+  0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
+  0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
+  0xf9, 0xfa
+};
+
+const uint8_t bits_ac_chrominance[17] =
+{ /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
+
+const uint8_t val_ac_chrominance[] =
+{ 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
+  0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
+  0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
+  0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
+  0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
+  0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
+  0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
+  0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
+  0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
+  0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
+  0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
+  0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
+  0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
+  0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
+  0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
+  0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
+  0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
+  0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
+  0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
+  0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
+  0xf9, 0xfa
+};
+
+/* isn't this function nicer than the one in the libjpeg ? */
+void build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
+                                const uint8_t *bits_table, const uint8_t *val_table)
+{
+    int i, j, k,nb, code, sym;
+
+    code = 0;
+    k = 0;
+    for(i=1;i<=16;i++) {
+        nb = bits_table[i];
+        for(j=0;j<nb;j++) {
+            sym = val_table[k++];
+            huff_size[sym] = i;
+            huff_code[sym] = code;
+            code++;
+        }
+        code <<= 1;
+    }
+}
index ab546ed..7030b17 100644 (file)
@@ -192,4 +192,31 @@ typedef struct MJpegDecodeContext {
     int cur_scan; /* current scan, used by JPEG-LS */
 } MJpegDecodeContext;
 
+#define PREDICT(ret, topleft, top, left, predictor)\
+    switch(predictor){\
+        case 1: ret= left; break;\
+        case 2: ret= top; break;\
+        case 3: ret= topleft; break;\
+        case 4: ret= left   +   top - topleft; break;\
+        case 5: ret= left   + ((top - topleft)>>1); break;\
+        case 6: ret= top + ((left   - topleft)>>1); break;\
+        default:\
+        case 7: ret= (left + top)>>1; break;\
+    }
+
+extern const uint8_t bits_dc_luminance[];
+extern const uint8_t val_dc_luminance[];
+
+extern const uint8_t bits_dc_chrominance[];
+extern const uint8_t val_dc_chrominance[];
+
+extern const uint8_t bits_ac_luminance[];
+extern const uint8_t val_ac_luminance[];
+
+extern const uint8_t bits_ac_chrominance[];
+extern const uint8_t val_ac_chrominance[];
+
+void build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
+                         const uint8_t *bits_table, const uint8_t *val_table);
+
 #endif /* MJPEG_H */
similarity index 70%
copy from libavcodec/mjpeg.c
copy to libavcodec/mjpegdec.c
index 1b04d0f..b3ced4d 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * MJPEG encoder and decoder
+ * MJPEG decoder
  * Copyright (c) 2000, 2001 Fabrice Bellard.
  * Copyright (c) 2003 Alex Beregszaszi
  * Copyright (c) 2003-2004 Michael Niedermayer
@@ -26,8 +26,8 @@
  */
 
 /**
- * @file mjpeg.c
- * MJPEG encoder and decoder.
+ * @file mjpegdec.c
+ * MJPEG decoder.
  */
 
 //#define DEBUG
 
 #include "avcodec.h"
 #include "dsputil.h"
-#include "mpegvideo.h"
 #include "bytestream.h"
 #include "mjpeg.h"
 #include "jpeglsdec.h"
 
-/* use two quantizer tables (one for luminance and one for chrominance) */
-/* not yet working */
-#undef TWOMATRIXES
-
-typedef struct MJpegContext {
-    uint8_t huff_size_dc_luminance[12]; //FIXME use array [3] instead of lumi / chrom, for easier addressing
-    uint16_t huff_code_dc_luminance[12];
-    uint8_t huff_size_dc_chrominance[12];
-    uint16_t huff_code_dc_chrominance[12];
-
-    uint8_t huff_size_ac_luminance[256];
-    uint16_t huff_code_ac_luminance[256];
-    uint8_t huff_size_ac_chrominance[256];
-    uint16_t huff_code_ac_chrominance[256];
-} MJpegContext;
-
-#if 0
-/* These are the sample quantization tables given in JPEG spec section K.1.
- * The spec says that the values given produce "good" quality, and
- * when divided by 2, "very good" quality.
- */
-static const unsigned char std_luminance_quant_tbl[64] = {
-    16,  11,  10,  16,  24,  40,  51,  61,
-    12,  12,  14,  19,  26,  58,  60,  55,
-    14,  13,  16,  24,  40,  57,  69,  56,
-    14,  17,  22,  29,  51,  87,  80,  62,
-    18,  22,  37,  56,  68, 109, 103,  77,
-    24,  35,  55,  64,  81, 104, 113,  92,
-    49,  64,  78,  87, 103, 121, 120, 101,
-    72,  92,  95,  98, 112, 100, 103,  99
-};
-static const unsigned char std_chrominance_quant_tbl[64] = {
-    17,  18,  24,  47,  99,  99,  99,  99,
-    18,  21,  26,  66,  99,  99,  99,  99,
-    24,  26,  56,  99,  99,  99,  99,  99,
-    47,  66,  99,  99,  99,  99,  99,  99,
-    99,  99,  99,  99,  99,  99,  99,  99,
-    99,  99,  99,  99,  99,  99,  99,  99,
-    99,  99,  99,  99,  99,  99,  99,  99,
-    99,  99,  99,  99,  99,  99,  99,  99
-};
-#endif
-
-/* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
-/* IMPORTANT: these are only valid for 8-bit data precision! */
-static const uint8_t bits_dc_luminance[17] =
-{ /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
-static const uint8_t val_dc_luminance[] =
-{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
-
-static const uint8_t bits_dc_chrominance[17] =
-{ /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
-static const uint8_t val_dc_chrominance[] =
-{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
-
-static const uint8_t bits_ac_luminance[17] =
-{ /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
-static const uint8_t val_ac_luminance[] =
-{ 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
-  0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
-  0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
-  0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
-  0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
-  0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
-  0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
-  0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
-  0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
-  0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
-  0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
-  0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
-  0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
-  0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
-  0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
-  0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
-  0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
-  0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
-  0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
-  0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
-  0xf9, 0xfa
-};
-
-static const uint8_t bits_ac_chrominance[17] =
-{ /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
-
-static const uint8_t val_ac_chrominance[] =
-{ 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
-  0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
-  0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
-  0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
-  0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
-  0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
-  0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
-  0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
-  0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
-  0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
-  0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
-  0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
-  0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
-  0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
-  0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
-  0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
-  0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
-  0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
-  0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
-  0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
-  0xf9, 0xfa
-};
-
-/* isn't this function nicer than the one in the libjpeg ? */
-static void build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
-                                const uint8_t *bits_table, const uint8_t *val_table)
-{
-    int i, j, k,nb, code, sym;
-
-    code = 0;
-    k = 0;
-    for(i=1;i<=16;i++) {
-        nb = bits_table[i];
-        for(j=0;j<nb;j++) {
-            sym = val_table[k++];
-            huff_size[sym] = i;
-            huff_code[sym] = code;
-            code++;
-        }
-        code <<= 1;
-    }
-}
-
-#ifdef CONFIG_ENCODERS
-int mjpeg_init(MpegEncContext *s)
-{
-    MJpegContext *m;
-
-    m = av_malloc(sizeof(MJpegContext));
-    if (!m)
-        return -1;
-
-    s->min_qcoeff=-1023;
-    s->max_qcoeff= 1023;
-
-    /* build all the huffman tables */
-    build_huffman_codes(m->huff_size_dc_luminance,
-                        m->huff_code_dc_luminance,
-                        bits_dc_luminance,
-                        val_dc_luminance);
-    build_huffman_codes(m->huff_size_dc_chrominance,
-                        m->huff_code_dc_chrominance,
-                        bits_dc_chrominance,
-                        val_dc_chrominance);
-    build_huffman_codes(m->huff_size_ac_luminance,
-                        m->huff_code_ac_luminance,
-                        bits_ac_luminance,
-                        val_ac_luminance);
-    build_huffman_codes(m->huff_size_ac_chrominance,
-                        m->huff_code_ac_chrominance,
-                        bits_ac_chrominance,
-                        val_ac_chrominance);
-
-    s->mjpeg_ctx = m;
-    return 0;
-}
-
-void mjpeg_close(MpegEncContext *s)
-{
-    av_free(s->mjpeg_ctx);
-}
-#endif //CONFIG_ENCODERS
-
-#define PREDICT(ret, topleft, top, left, predictor)\
-    switch(predictor){\
-        case 1: ret= left; break;\
-        case 2: ret= top; break;\
-        case 3: ret= topleft; break;\
-        case 4: ret= left   +   top - topleft; break;\
-        case 5: ret= left   + ((top - topleft)>>1); break;\
-        case 6: ret= top + ((left   - topleft)>>1); break;\
-        default:\
-        case 7: ret= (left + top)>>1; break;\
-    }
-
-#ifdef CONFIG_ENCODERS
-/* table_class: 0 = DC coef, 1 = AC coefs */
-static int put_huffman_table(MpegEncContext *s, int table_class, int table_id,
-                             const uint8_t *bits_table, const uint8_t *value_table)
-{
-    PutBitContext *p = &s->pb;
-    int n, i;
-
-    put_bits(p, 4, table_class);
-    put_bits(p, 4, table_id);
-
-    n = 0;
-    for(i=1;i<=16;i++) {
-        n += bits_table[i];
-        put_bits(p, 8, bits_table[i]);
-    }
-
-    for(i=0;i<n;i++)
-        put_bits(p, 8, value_table[i]);
-
-    return n + 17;
-}
-
-static void jpeg_table_header(MpegEncContext *s)
-{
-    PutBitContext *p = &s->pb;
-    int i, j, size;
-    uint8_t *ptr;
-
-    /* quant matrixes */
-    put_marker(p, DQT);
-#ifdef TWOMATRIXES
-    put_bits(p, 16, 2 + 2 * (1 + 64));
-#else
-    put_bits(p, 16, 2 + 1 * (1 + 64));
-#endif
-    put_bits(p, 4, 0); /* 8 bit precision */
-    put_bits(p, 4, 0); /* table 0 */
-    for(i=0;i<64;i++) {
-        j = s->intra_scantable.permutated[i];
-        put_bits(p, 8, s->intra_matrix[j]);
-    }
-#ifdef TWOMATRIXES
-    put_bits(p, 4, 0); /* 8 bit precision */
-    put_bits(p, 4, 1); /* table 1 */
-    for(i=0;i<64;i++) {
-        j = s->intra_scantable.permutated[i];
-        put_bits(p, 8, s->chroma_intra_matrix[j]);
-    }
-#endif
-
-    /* huffman table */
-    put_marker(p, DHT);
-    flush_put_bits(p);
-    ptr = pbBufPtr(p);
-    put_bits(p, 16, 0); /* patched later */
-    size = 2;
-    size += put_huffman_table(s, 0, 0, bits_dc_luminance, val_dc_luminance);
-    size += put_huffman_table(s, 0, 1, bits_dc_chrominance, val_dc_chrominance);
-
-    size += put_huffman_table(s, 1, 0, bits_ac_luminance, val_ac_luminance);
-    size += put_huffman_table(s, 1, 1, bits_ac_chrominance, val_ac_chrominance);
-    ptr[0] = size >> 8;
-    ptr[1] = size;
-}
-
-static void jpeg_put_comments(MpegEncContext *s)
-{
-    PutBitContext *p = &s->pb;
-    int size;
-    uint8_t *ptr;
-
-    if (s->aspect_ratio_info /* && !lossless */)
-    {
-    /* JFIF header */
-    put_marker(p, APP0);
-    put_bits(p, 16, 16);
-    ff_put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */
-    put_bits(p, 16, 0x0201); /* v 1.02 */
-    put_bits(p, 8, 0); /* units type: 0 - aspect ratio */
-    put_bits(p, 16, s->avctx->sample_aspect_ratio.num);
-    put_bits(p, 16, s->avctx->sample_aspect_ratio.den);
-    put_bits(p, 8, 0); /* thumbnail width */
-    put_bits(p, 8, 0); /* thumbnail height */
-    }
-
-    /* comment */
-    if(!(s->flags & CODEC_FLAG_BITEXACT)){
-        put_marker(p, COM);
-        flush_put_bits(p);
-        ptr = pbBufPtr(p);
-        put_bits(p, 16, 0); /* patched later */
-        ff_put_string(p, LIBAVCODEC_IDENT, 1);
-        size = strlen(LIBAVCODEC_IDENT)+3;
-        ptr[0] = size >> 8;
-        ptr[1] = size;
-    }
-
-    if(  s->avctx->pix_fmt == PIX_FMT_YUV420P
-       ||s->avctx->pix_fmt == PIX_FMT_YUV422P
-       ||s->avctx->pix_fmt == PIX_FMT_YUV444P){
-        put_marker(p, COM);
-        flush_put_bits(p);
-        ptr = pbBufPtr(p);
-        put_bits(p, 16, 0); /* patched later */
-        ff_put_string(p, "CS=ITU601", 1);
-        size = strlen("CS=ITU601")+3;
-        ptr[0] = size >> 8;
-        ptr[1] = size;
-    }
-}
-
-void mjpeg_picture_header(MpegEncContext *s)
-{
-    const int lossless= s->avctx->codec_id != CODEC_ID_MJPEG;
-
-    put_marker(&s->pb, SOI);
-
-    jpeg_put_comments(s);
-
-    jpeg_table_header(s);
-
-    switch(s->avctx->codec_id){
-    case CODEC_ID_MJPEG:  put_marker(&s->pb, SOF0 ); break;
-    case CODEC_ID_LJPEG:  put_marker(&s->pb, SOF3 ); break;
-    default: assert(0);
-    }
-
-    put_bits(&s->pb, 16, 17);
-    if(lossless && s->avctx->pix_fmt == PIX_FMT_RGB32)
-        put_bits(&s->pb, 8, 9); /* 9 bits/component RCT */
-    else
-        put_bits(&s->pb, 8, 8); /* 8 bits/component */
-    put_bits(&s->pb, 16, s->height);
-    put_bits(&s->pb, 16, s->width);
-    put_bits(&s->pb, 8, 3); /* 3 components */
-
-    /* Y component */
-    put_bits(&s->pb, 8, 1); /* component number */
-    put_bits(&s->pb, 4, s->mjpeg_hsample[0]); /* H factor */
-    put_bits(&s->pb, 4, s->mjpeg_vsample[0]); /* V factor */
-    put_bits(&s->pb, 8, 0); /* select matrix */
-
-    /* Cb component */
-    put_bits(&s->pb, 8, 2); /* component number */
-    put_bits(&s->pb, 4, s->mjpeg_hsample[1]); /* H factor */
-    put_bits(&s->pb, 4, s->mjpeg_vsample[1]); /* V factor */
-#ifdef TWOMATRIXES
-    put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
-#else
-    put_bits(&s->pb, 8, 0); /* select matrix */
-#endif
-
-    /* Cr component */
-    put_bits(&s->pb, 8, 3); /* component number */
-    put_bits(&s->pb, 4, s->mjpeg_hsample[2]); /* H factor */
-    put_bits(&s->pb, 4, s->mjpeg_vsample[2]); /* V factor */
-#ifdef TWOMATRIXES
-    put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
-#else
-    put_bits(&s->pb, 8, 0); /* select matrix */
-#endif
-
-    /* scan header */
-    put_marker(&s->pb, SOS);
-    put_bits(&s->pb, 16, 12); /* length */
-    put_bits(&s->pb, 8, 3); /* 3 components */
-
-    /* Y component */
-    put_bits(&s->pb, 8, 1); /* index */
-    put_bits(&s->pb, 4, 0); /* DC huffman table index */
-    put_bits(&s->pb, 4, 0); /* AC huffman table index */
-
-    /* Cb component */
-    put_bits(&s->pb, 8, 2); /* index */
-    put_bits(&s->pb, 4, 1); /* DC huffman table index */
-    put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
-
-    /* Cr component */
-    put_bits(&s->pb, 8, 3); /* index */
-    put_bits(&s->pb, 4, 1); /* DC huffman table index */
-    put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
-
-    put_bits(&s->pb, 8, lossless ? s->avctx->prediction_method+1 : 0); /* Ss (not used) */
-
-    switch(s->avctx->codec_id){
-    case CODEC_ID_MJPEG:  put_bits(&s->pb, 8, 63); break; /* Se (not used) */
-    case CODEC_ID_LJPEG:  put_bits(&s->pb, 8,  0); break; /* not used */
-    default: assert(0);
-    }
-
-    put_bits(&s->pb, 8, 0); /* Ah/Al (not used) */
-}
-
-static void escape_FF(MpegEncContext *s, int start)
-{
-    int size= put_bits_count(&s->pb) - start*8;
-    int i, ff_count;
-    uint8_t *buf= s->pb.buf + start;
-    int align= (-(size_t)(buf))&3;
-
-    assert((size&7) == 0);
-    size >>= 3;
-
-    ff_count=0;
-    for(i=0; i<size && i<align; i++){
-        if(buf[i]==0xFF) ff_count++;
-    }
-    for(; i<size-15; i+=16){
-        int acc, v;
-
-        v= *(uint32_t*)(&buf[i]);
-        acc= (((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
-        v= *(uint32_t*)(&buf[i+4]);
-        acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
-        v= *(uint32_t*)(&buf[i+8]);
-        acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
-        v= *(uint32_t*)(&buf[i+12]);
-        acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
-
-        acc>>=4;
-        acc+= (acc>>16);
-        acc+= (acc>>8);
-        ff_count+= acc&0xFF;
-    }
-    for(; i<size; i++){
-        if(buf[i]==0xFF) ff_count++;
-    }
-
-    if(ff_count==0) return;
-
-    /* skip put bits */
-    for(i=0; i<ff_count-3; i+=4)
-        put_bits(&s->pb, 32, 0);
-    put_bits(&s->pb, (ff_count-i)*8, 0);
-    flush_put_bits(&s->pb);
-
-    for(i=size-1; ff_count; i--){
-        int v= buf[i];
-
-        if(v==0xFF){
-//printf("%d %d\n", i, ff_count);
-            buf[i+ff_count]= 0;
-            ff_count--;
-        }
-
-        buf[i+ff_count]= v;
-    }
-}
-
-void ff_mjpeg_stuffing(PutBitContext * pbc)
-{
-    int length;
-    length= (-put_bits_count(pbc))&7;
-    if(length) put_bits(pbc, length, (1<<length)-1);
-}
-
-void mjpeg_picture_trailer(MpegEncContext *s)
-{
-    ff_mjpeg_stuffing(&s->pb);
-    flush_put_bits(&s->pb);
-
-    assert((s->header_bits&7)==0);
-
-    escape_FF(s, s->header_bits>>3);
-
-    put_marker(&s->pb, EOI);
-}
-
-static inline void mjpeg_encode_dc(MpegEncContext *s, int val,
-                                   uint8_t *huff_size, uint16_t *huff_code)
-{
-    int mant, nbits;
-
-    if (val == 0) {
-        put_bits(&s->pb, huff_size[0], huff_code[0]);
-    } else {
-        mant = val;
-        if (val < 0) {
-            val = -val;
-            mant--;
-        }
-
-        nbits= av_log2_16bit(val) + 1;
-
-        put_bits(&s->pb, huff_size[nbits], huff_code[nbits]);
-
-        put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
-    }
-}
-
-static void encode_block(MpegEncContext *s, DCTELEM *block, int n)
-{
-    int mant, nbits, code, i, j;
-    int component, dc, run, last_index, val;
-    MJpegContext *m = s->mjpeg_ctx;
-    uint8_t *huff_size_ac;
-    uint16_t *huff_code_ac;
-
-    /* DC coef */
-    component = (n <= 3 ? 0 : (n&1) + 1);
-    dc = block[0]; /* overflow is impossible */
-    val = dc - s->last_dc[component];
-    if (n < 4) {
-        mjpeg_encode_dc(s, val, m->huff_size_dc_luminance, m->huff_code_dc_luminance);
-        huff_size_ac = m->huff_size_ac_luminance;
-        huff_code_ac = m->huff_code_ac_luminance;
-    } else {
-        mjpeg_encode_dc(s, val, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
-        huff_size_ac = m->huff_size_ac_chrominance;
-        huff_code_ac = m->huff_code_ac_chrominance;
-    }
-    s->last_dc[component] = dc;
-
-    /* AC coefs */
-
-    run = 0;
-    last_index = s->block_last_index[n];
-    for(i=1;i<=last_index;i++) {
-        j = s->intra_scantable.permutated[i];
-        val = block[j];
-        if (val == 0) {
-            run++;
-        } else {
-            while (run >= 16) {
-                put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
-                run -= 16;
-            }
-            mant = val;
-            if (val < 0) {
-                val = -val;
-                mant--;
-            }
-
-            nbits= av_log2(val) + 1;
-            code = (run << 4) | nbits;
-
-            put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]);
-
-            put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
-            run = 0;
-        }
-    }
-
-    /* output EOB only if not already 64 values */
-    if (last_index < 63 || run != 0)
-        put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
-}
-
-void mjpeg_encode_mb(MpegEncContext *s,
-                     DCTELEM block[6][64])
-{
-    int i;
-    for(i=0;i<5;i++) {
-        encode_block(s, block[i], i);
-    }
-    if (s->chroma_format == CHROMA_420) {
-        encode_block(s, block[5], 5);
-    } else {
-        encode_block(s, block[6], 6);
-        encode_block(s, block[5], 5);
-        encode_block(s, block[7], 7);
-    }
-}
-
-static int encode_picture_lossless(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
-    MpegEncContext * const s = avctx->priv_data;
-    MJpegContext * const m = s->mjpeg_ctx;
-    AVFrame *pict = data;
-    const int width= s->width;
-    const int height= s->height;
-    AVFrame * const p= (AVFrame*)&s->current_picture;
-    const int predictor= avctx->prediction_method+1;
-
-    init_put_bits(&s->pb, buf, buf_size);
-
-    *p = *pict;
-    p->pict_type= FF_I_TYPE;
-    p->key_frame= 1;
-
-    mjpeg_picture_header(s);
-
-    s->header_bits= put_bits_count(&s->pb);
-
-    if(avctx->pix_fmt == PIX_FMT_RGB32){
-        int x, y, i;
-        const int linesize= p->linesize[0];
-        uint16_t (*buffer)[4]= (void *) s->rd_scratchpad;
-        int left[3], top[3], topleft[3];
-
-        for(i=0; i<3; i++){
-            buffer[0][i]= 1 << (9 - 1);
-        }
-
-        for(y = 0; y < height; y++) {
-            const int modified_predictor= y ? predictor : 1;
-            uint8_t *ptr = p->data[0] + (linesize * y);
-
-            if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < width*3*4){
-                av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
-                return -1;
-            }
-
-            for(i=0; i<3; i++){
-                top[i]= left[i]= topleft[i]= buffer[0][i];
-            }
-            for(x = 0; x < width; x++) {
-                buffer[x][1] = ptr[4*x+0] - ptr[4*x+1] + 0x100;
-                buffer[x][2] = ptr[4*x+2] - ptr[4*x+1] + 0x100;
-                buffer[x][0] = (ptr[4*x+0] + 2*ptr[4*x+1] + ptr[4*x+2])>>2;
-
-                for(i=0;i<3;i++) {
-                    int pred, diff;
-
-                    PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
-
-                    topleft[i]= top[i];
-                    top[i]= buffer[x+1][i];
-
-                    left[i]= buffer[x][i];
-
-                    diff= ((left[i] - pred + 0x100)&0x1FF) - 0x100;
-
-                    if(i==0)
-                        mjpeg_encode_dc(s, diff, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
-                    else
-                        mjpeg_encode_dc(s, diff, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
-                }
-            }
-        }
-    }else{
-        int mb_x, mb_y, i;
-        const int mb_width  = (width  + s->mjpeg_hsample[0] - 1) / s->mjpeg_hsample[0];
-        const int mb_height = (height + s->mjpeg_vsample[0] - 1) / s->mjpeg_vsample[0];
-
-        for(mb_y = 0; mb_y < mb_height; mb_y++) {
-            if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < mb_width * 4 * 3 * s->mjpeg_hsample[0] * s->mjpeg_vsample[0]){
-                av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
-                return -1;
-            }
-            for(mb_x = 0; mb_x < mb_width; mb_x++) {
-                if(mb_x==0 || mb_y==0){
-                    for(i=0;i<3;i++) {
-                        uint8_t *ptr;
-                        int x, y, h, v, linesize;
-                        h = s->mjpeg_hsample[i];
-                        v = s->mjpeg_vsample[i];
-                        linesize= p->linesize[i];
-
-                        for(y=0; y<v; y++){
-                            for(x=0; x<h; x++){
-                                int pred;
-
-                                ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
-                                if(y==0 && mb_y==0){
-                                    if(x==0 && mb_x==0){
-                                        pred= 128;
-                                    }else{
-                                        pred= ptr[-1];
-                                    }
-                                }else{
-                                    if(x==0 && mb_x==0){
-                                        pred= ptr[-linesize];
-                                    }else{
-                                        PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
-                                    }
-                                }
-
-                                if(i==0)
-                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
-                                else
-                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
-                            }
-                        }
-                    }
-                }else{
-                    for(i=0;i<3;i++) {
-                        uint8_t *ptr;
-                        int x, y, h, v, linesize;
-                        h = s->mjpeg_hsample[i];
-                        v = s->mjpeg_vsample[i];
-                        linesize= p->linesize[i];
-
-                        for(y=0; y<v; y++){
-                            for(x=0; x<h; x++){
-                                int pred;
-
-                                ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
-//printf("%d %d %d %d %8X\n", mb_x, mb_y, x, y, ptr);
-                                PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
-
-                                if(i==0)
-                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
-                                else
-                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
-                            }
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-    emms_c();
-
-    mjpeg_picture_trailer(s);
-    s->picture_number++;
-
-    flush_put_bits(&s->pb);
-    return pbBufPtr(&s->pb) - s->pb.buf;
-//    return (put_bits_count(&f->pb)+7)/8;
-}
-
-#endif //CONFIG_ENCODERS
-
-/******************************************/
-/* decoding */
 
 static int mjpeg_decode_dht(MJpegDecodeContext *s);
 
@@ -2389,18 +1691,6 @@ AVCodec sp5x_decoder = {
     NULL
 };
 
-#ifdef CONFIG_ENCODERS
-AVCodec ljpeg_encoder = { //FIXME avoid MPV_* lossless jpeg shouldnt need them
-    "ljpeg",
-    CODEC_TYPE_VIDEO,
-    CODEC_ID_LJPEG,
-    sizeof(MpegEncContext),
-    MPV_encode_init,
-    encode_picture_lossless,
-    MPV_encode_end,
-};
-#endif
-
 #ifdef CONFIG_MJPEGA_DUMP_HEADER_BSF
 AVBitStreamFilter mjpega_dump_header_bsf = {
     "mjpegadump",
diff --git a/libavcodec/mjpegenc.c b/libavcodec/mjpegenc.c
new file mode 100644 (file)
index 0000000..11967fe
--- /dev/null
@@ -0,0 +1,617 @@
+/*
+ * MJPEG encoder
+ * Copyright (c) 2000, 2001 Fabrice Bellard.
+ * Copyright (c) 2003 Alex Beregszaszi
+ * Copyright (c) 2003-2004 Michael Niedermayer
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Support for external huffman table, various fixes (AVID workaround),
+ * aspecting, new decode_frame mechanism and apple mjpeg-b support
+ *                                  by Alex Beregszaszi
+ */
+
+/**
+ * @file mjpegenc.c
+ * MJPEG encoder.
+ */
+
+//#define DEBUG
+#include <assert.h>
+
+#include "avcodec.h"
+#include "dsputil.h"
+#include "mpegvideo.h"
+#include "mjpeg.h"
+
+/* use two quantizer tables (one for luminance and one for chrominance) */
+/* not yet working */
+#undef TWOMATRIXES
+
+typedef struct MJpegContext {
+    uint8_t huff_size_dc_luminance[12]; //FIXME use array [3] instead of lumi / chrom, for easier addressing
+    uint16_t huff_code_dc_luminance[12];
+    uint8_t huff_size_dc_chrominance[12];
+    uint16_t huff_code_dc_chrominance[12];
+
+    uint8_t huff_size_ac_luminance[256];
+    uint16_t huff_code_ac_luminance[256];
+    uint8_t huff_size_ac_chrominance[256];
+    uint16_t huff_code_ac_chrominance[256];
+} MJpegContext;
+
+
+int mjpeg_init(MpegEncContext *s)
+{
+    MJpegContext *m;
+
+    m = av_malloc(sizeof(MJpegContext));
+    if (!m)
+        return -1;
+
+    s->min_qcoeff=-1023;
+    s->max_qcoeff= 1023;
+
+    /* build all the huffman tables */
+    build_huffman_codes(m->huff_size_dc_luminance,
+                        m->huff_code_dc_luminance,
+                        bits_dc_luminance,
+                        val_dc_luminance);
+    build_huffman_codes(m->huff_size_dc_chrominance,
+                        m->huff_code_dc_chrominance,
+                        bits_dc_chrominance,
+                        val_dc_chrominance);
+    build_huffman_codes(m->huff_size_ac_luminance,
+                        m->huff_code_ac_luminance,
+                        bits_ac_luminance,
+                        val_ac_luminance);
+    build_huffman_codes(m->huff_size_ac_chrominance,
+                        m->huff_code_ac_chrominance,
+                        bits_ac_chrominance,
+                        val_ac_chrominance);
+
+    s->mjpeg_ctx = m;
+    return 0;
+}
+
+void mjpeg_close(MpegEncContext *s)
+{
+    av_free(s->mjpeg_ctx);
+}
+
+/* table_class: 0 = DC coef, 1 = AC coefs */
+static int put_huffman_table(MpegEncContext *s, int table_class, int table_id,
+                             const uint8_t *bits_table, const uint8_t *value_table)
+{
+    PutBitContext *p = &s->pb;
+    int n, i;
+
+    put_bits(p, 4, table_class);
+    put_bits(p, 4, table_id);
+
+    n = 0;
+    for(i=1;i<=16;i++) {
+        n += bits_table[i];
+        put_bits(p, 8, bits_table[i]);
+    }
+
+    for(i=0;i<n;i++)
+        put_bits(p, 8, value_table[i]);
+
+    return n + 17;
+}
+
+static void jpeg_table_header(MpegEncContext *s)
+{
+    PutBitContext *p = &s->pb;
+    int i, j, size;
+    uint8_t *ptr;
+
+    /* quant matrixes */
+    put_marker(p, DQT);
+#ifdef TWOMATRIXES
+    put_bits(p, 16, 2 + 2 * (1 + 64));
+#else
+    put_bits(p, 16, 2 + 1 * (1 + 64));
+#endif
+    put_bits(p, 4, 0); /* 8 bit precision */
+    put_bits(p, 4, 0); /* table 0 */
+    for(i=0;i<64;i++) {
+        j = s->intra_scantable.permutated[i];
+        put_bits(p, 8, s->intra_matrix[j]);
+    }
+#ifdef TWOMATRIXES
+    put_bits(p, 4, 0); /* 8 bit precision */
+    put_bits(p, 4, 1); /* table 1 */
+    for(i=0;i<64;i++) {
+        j = s->intra_scantable.permutated[i];
+        put_bits(p, 8, s->chroma_intra_matrix[j]);
+    }
+#endif
+
+    /* huffman table */
+    put_marker(p, DHT);
+    flush_put_bits(p);
+    ptr = pbBufPtr(p);
+    put_bits(p, 16, 0); /* patched later */
+    size = 2;
+    size += put_huffman_table(s, 0, 0, bits_dc_luminance, val_dc_luminance);
+    size += put_huffman_table(s, 0, 1, bits_dc_chrominance, val_dc_chrominance);
+
+    size += put_huffman_table(s, 1, 0, bits_ac_luminance, val_ac_luminance);
+    size += put_huffman_table(s, 1, 1, bits_ac_chrominance, val_ac_chrominance);
+    ptr[0] = size >> 8;
+    ptr[1] = size;
+}
+
+static void jpeg_put_comments(MpegEncContext *s)
+{
+    PutBitContext *p = &s->pb;
+    int size;
+    uint8_t *ptr;
+
+    if (s->aspect_ratio_info /* && !lossless */)
+    {
+    /* JFIF header */
+    put_marker(p, APP0);
+    put_bits(p, 16, 16);
+    ff_put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */
+    put_bits(p, 16, 0x0201); /* v 1.02 */
+    put_bits(p, 8, 0); /* units type: 0 - aspect ratio */
+    put_bits(p, 16, s->avctx->sample_aspect_ratio.num);
+    put_bits(p, 16, s->avctx->sample_aspect_ratio.den);
+    put_bits(p, 8, 0); /* thumbnail width */
+    put_bits(p, 8, 0); /* thumbnail height */
+    }
+
+    /* comment */
+    if(!(s->flags & CODEC_FLAG_BITEXACT)){
+        put_marker(p, COM);
+        flush_put_bits(p);
+        ptr = pbBufPtr(p);
+        put_bits(p, 16, 0); /* patched later */
+        ff_put_string(p, LIBAVCODEC_IDENT, 1);
+        size = strlen(LIBAVCODEC_IDENT)+3;
+        ptr[0] = size >> 8;
+        ptr[1] = size;
+    }
+
+    if(  s->avctx->pix_fmt == PIX_FMT_YUV420P
+       ||s->avctx->pix_fmt == PIX_FMT_YUV422P
+       ||s->avctx->pix_fmt == PIX_FMT_YUV444P){
+        put_marker(p, COM);
+        flush_put_bits(p);
+        ptr = pbBufPtr(p);
+        put_bits(p, 16, 0); /* patched later */
+        ff_put_string(p, "CS=ITU601", 1);
+        size = strlen("CS=ITU601")+3;
+        ptr[0] = size >> 8;
+        ptr[1] = size;
+    }
+}
+
+void mjpeg_picture_header(MpegEncContext *s)
+{
+    const int lossless= s->avctx->codec_id != CODEC_ID_MJPEG;
+
+    put_marker(&s->pb, SOI);
+
+    jpeg_put_comments(s);
+
+    jpeg_table_header(s);
+
+    switch(s->avctx->codec_id){
+    case CODEC_ID_MJPEG:  put_marker(&s->pb, SOF0 ); break;
+    case CODEC_ID_LJPEG:  put_marker(&s->pb, SOF3 ); break;
+    default: assert(0);
+    }
+
+    put_bits(&s->pb, 16, 17);
+    if(lossless && s->avctx->pix_fmt == PIX_FMT_RGB32)
+        put_bits(&s->pb, 8, 9); /* 9 bits/component RCT */
+    else
+        put_bits(&s->pb, 8, 8); /* 8 bits/component */
+    put_bits(&s->pb, 16, s->height);
+    put_bits(&s->pb, 16, s->width);
+    put_bits(&s->pb, 8, 3); /* 3 components */
+
+    /* Y component */
+    put_bits(&s->pb, 8, 1); /* component number */
+    put_bits(&s->pb, 4, s->mjpeg_hsample[0]); /* H factor */
+    put_bits(&s->pb, 4, s->mjpeg_vsample[0]); /* V factor */
+    put_bits(&s->pb, 8, 0); /* select matrix */
+
+    /* Cb component */
+    put_bits(&s->pb, 8, 2); /* component number */
+    put_bits(&s->pb, 4, s->mjpeg_hsample[1]); /* H factor */
+    put_bits(&s->pb, 4, s->mjpeg_vsample[1]); /* V factor */
+#ifdef TWOMATRIXES
+    put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
+#else
+    put_bits(&s->pb, 8, 0); /* select matrix */
+#endif
+
+    /* Cr component */
+    put_bits(&s->pb, 8, 3); /* component number */
+    put_bits(&s->pb, 4, s->mjpeg_hsample[2]); /* H factor */
+    put_bits(&s->pb, 4, s->mjpeg_vsample[2]); /* V factor */
+#ifdef TWOMATRIXES
+    put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
+#else
+    put_bits(&s->pb, 8, 0); /* select matrix */
+#endif
+
+    /* scan header */
+    put_marker(&s->pb, SOS);
+    put_bits(&s->pb, 16, 12); /* length */
+    put_bits(&s->pb, 8, 3); /* 3 components */
+
+    /* Y component */
+    put_bits(&s->pb, 8, 1); /* index */
+    put_bits(&s->pb, 4, 0); /* DC huffman table index */
+    put_bits(&s->pb, 4, 0); /* AC huffman table index */
+
+    /* Cb component */
+    put_bits(&s->pb, 8, 2); /* index */
+    put_bits(&s->pb, 4, 1); /* DC huffman table index */
+    put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
+
+    /* Cr component */
+    put_bits(&s->pb, 8, 3); /* index */
+    put_bits(&s->pb, 4, 1); /* DC huffman table index */
+    put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
+
+    put_bits(&s->pb, 8, lossless ? s->avctx->prediction_method+1 : 0); /* Ss (not used) */
+
+    switch(s->avctx->codec_id){
+    case CODEC_ID_MJPEG:  put_bits(&s->pb, 8, 63); break; /* Se (not used) */
+    case CODEC_ID_LJPEG:  put_bits(&s->pb, 8,  0); break; /* not used */
+    default: assert(0);
+    }
+
+    put_bits(&s->pb, 8, 0); /* Ah/Al (not used) */
+}
+
+static void escape_FF(MpegEncContext *s, int start)
+{
+    int size= put_bits_count(&s->pb) - start*8;
+    int i, ff_count;
+    uint8_t *buf= s->pb.buf + start;
+    int align= (-(size_t)(buf))&3;
+
+    assert((size&7) == 0);
+    size >>= 3;
+
+    ff_count=0;
+    for(i=0; i<size && i<align; i++){
+        if(buf[i]==0xFF) ff_count++;
+    }
+    for(; i<size-15; i+=16){
+        int acc, v;
+
+        v= *(uint32_t*)(&buf[i]);
+        acc= (((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
+        v= *(uint32_t*)(&buf[i+4]);
+        acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
+        v= *(uint32_t*)(&buf[i+8]);
+        acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
+        v= *(uint32_t*)(&buf[i+12]);
+        acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
+
+        acc>>=4;
+        acc+= (acc>>16);
+        acc+= (acc>>8);
+        ff_count+= acc&0xFF;
+    }
+    for(; i<size; i++){
+        if(buf[i]==0xFF) ff_count++;
+    }
+
+    if(ff_count==0) return;
+
+    /* skip put bits */
+    for(i=0; i<ff_count-3; i+=4)
+        put_bits(&s->pb, 32, 0);
+    put_bits(&s->pb, (ff_count-i)*8, 0);
+    flush_put_bits(&s->pb);
+
+    for(i=size-1; ff_count; i--){
+        int v= buf[i];
+
+        if(v==0xFF){
+//printf("%d %d\n", i, ff_count);
+            buf[i+ff_count]= 0;
+            ff_count--;
+        }
+
+        buf[i+ff_count]= v;
+    }
+}
+
+void ff_mjpeg_stuffing(PutBitContext * pbc)
+{
+    int length;
+    length= (-put_bits_count(pbc))&7;
+    if(length) put_bits(pbc, length, (1<<length)-1);
+}
+
+void mjpeg_picture_trailer(MpegEncContext *s)
+{
+    ff_mjpeg_stuffing(&s->pb);
+    flush_put_bits(&s->pb);
+
+    assert((s->header_bits&7)==0);
+
+    escape_FF(s, s->header_bits>>3);
+
+    put_marker(&s->pb, EOI);
+}
+
+static inline void mjpeg_encode_dc(MpegEncContext *s, int val,
+                                   uint8_t *huff_size, uint16_t *huff_code)
+{
+    int mant, nbits;
+
+    if (val == 0) {
+        put_bits(&s->pb, huff_size[0], huff_code[0]);
+    } else {
+        mant = val;
+        if (val < 0) {
+            val = -val;
+            mant--;
+        }
+
+        nbits= av_log2_16bit(val) + 1;
+
+        put_bits(&s->pb, huff_size[nbits], huff_code[nbits]);
+
+        put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
+    }
+}
+
+static void encode_block(MpegEncContext *s, DCTELEM *block, int n)
+{
+    int mant, nbits, code, i, j;
+    int component, dc, run, last_index, val;
+    MJpegContext *m = s->mjpeg_ctx;
+    uint8_t *huff_size_ac;
+    uint16_t *huff_code_ac;
+
+    /* DC coef */
+    component = (n <= 3 ? 0 : (n&1) + 1);
+    dc = block[0]; /* overflow is impossible */
+    val = dc - s->last_dc[component];
+    if (n < 4) {
+        mjpeg_encode_dc(s, val, m->huff_size_dc_luminance, m->huff_code_dc_luminance);
+        huff_size_ac = m->huff_size_ac_luminance;
+        huff_code_ac = m->huff_code_ac_luminance;
+    } else {
+        mjpeg_encode_dc(s, val, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
+        huff_size_ac = m->huff_size_ac_chrominance;
+        huff_code_ac = m->huff_code_ac_chrominance;
+    }
+    s->last_dc[component] = dc;
+
+    /* AC coefs */
+
+    run = 0;
+    last_index = s->block_last_index[n];
+    for(i=1;i<=last_index;i++) {
+        j = s->intra_scantable.permutated[i];
+        val = block[j];
+        if (val == 0) {
+            run++;
+        } else {
+            while (run >= 16) {
+                put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
+                run -= 16;
+            }
+            mant = val;
+            if (val < 0) {
+                val = -val;
+                mant--;
+            }
+
+            nbits= av_log2(val) + 1;
+            code = (run << 4) | nbits;
+
+            put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]);
+
+            put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
+            run = 0;
+        }
+    }
+
+    /* output EOB only if not already 64 values */
+    if (last_index < 63 || run != 0)
+        put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
+}
+
+void mjpeg_encode_mb(MpegEncContext *s,
+                     DCTELEM block[6][64])
+{
+    int i;
+    for(i=0;i<5;i++) {
+        encode_block(s, block[i], i);
+    }
+    if (s->chroma_format == CHROMA_420) {
+        encode_block(s, block[5], 5);
+    } else {
+        encode_block(s, block[6], 6);
+        encode_block(s, block[5], 5);
+        encode_block(s, block[7], 7);
+    }
+}
+
+static int encode_picture_lossless(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
+    MpegEncContext * const s = avctx->priv_data;
+    MJpegContext * const m = s->mjpeg_ctx;
+    AVFrame *pict = data;
+    const int width= s->width;
+    const int height= s->height;
+    AVFrame * const p= (AVFrame*)&s->current_picture;
+    const int predictor= avctx->prediction_method+1;
+
+    init_put_bits(&s->pb, buf, buf_size);
+
+    *p = *pict;
+    p->pict_type= FF_I_TYPE;
+    p->key_frame= 1;
+
+    mjpeg_picture_header(s);
+
+    s->header_bits= put_bits_count(&s->pb);
+
+    if(avctx->pix_fmt == PIX_FMT_RGB32){
+        int x, y, i;
+        const int linesize= p->linesize[0];
+        uint16_t (*buffer)[4]= (void *) s->rd_scratchpad;
+        int left[3], top[3], topleft[3];
+
+        for(i=0; i<3; i++){
+            buffer[0][i]= 1 << (9 - 1);
+        }
+
+        for(y = 0; y < height; y++) {
+            const int modified_predictor= y ? predictor : 1;
+            uint8_t *ptr = p->data[0] + (linesize * y);
+
+            if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < width*3*4){
+                av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
+                return -1;
+            }
+
+            for(i=0; i<3; i++){
+                top[i]= left[i]= topleft[i]= buffer[0][i];
+            }
+            for(x = 0; x < width; x++) {
+                buffer[x][1] = ptr[4*x+0] - ptr[4*x+1] + 0x100;
+                buffer[x][2] = ptr[4*x+2] - ptr[4*x+1] + 0x100;
+                buffer[x][0] = (ptr[4*x+0] + 2*ptr[4*x+1] + ptr[4*x+2])>>2;
+
+                for(i=0;i<3;i++) {
+                    int pred, diff;
+
+                    PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
+
+                    topleft[i]= top[i];
+                    top[i]= buffer[x+1][i];
+
+                    left[i]= buffer[x][i];
+
+                    diff= ((left[i] - pred + 0x100)&0x1FF) - 0x100;
+
+                    if(i==0)
+                        mjpeg_encode_dc(s, diff, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
+                    else
+                        mjpeg_encode_dc(s, diff, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
+                }
+            }
+        }
+    }else{
+        int mb_x, mb_y, i;
+        const int mb_width  = (width  + s->mjpeg_hsample[0] - 1) / s->mjpeg_hsample[0];
+        const int mb_height = (height + s->mjpeg_vsample[0] - 1) / s->mjpeg_vsample[0];
+
+        for(mb_y = 0; mb_y < mb_height; mb_y++) {
+            if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < mb_width * 4 * 3 * s->mjpeg_hsample[0] * s->mjpeg_vsample[0]){
+                av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
+                return -1;
+            }
+            for(mb_x = 0; mb_x < mb_width; mb_x++) {
+                if(mb_x==0 || mb_y==0){
+                    for(i=0;i<3;i++) {
+                        uint8_t *ptr;
+                        int x, y, h, v, linesize;
+                        h = s->mjpeg_hsample[i];
+                        v = s->mjpeg_vsample[i];
+                        linesize= p->linesize[i];
+
+                        for(y=0; y<v; y++){
+                            for(x=0; x<h; x++){
+                                int pred;
+
+                                ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
+                                if(y==0 && mb_y==0){
+                                    if(x==0 && mb_x==0){
+                                        pred= 128;
+                                    }else{
+                                        pred= ptr[-1];
+                                    }
+                                }else{
+                                    if(x==0 && mb_x==0){
+                                        pred= ptr[-linesize];
+                                    }else{
+                                        PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
+                                    }
+                                }
+
+                                if(i==0)
+                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
+                                else
+                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
+                            }
+                        }
+                    }
+                }else{
+                    for(i=0;i<3;i++) {
+                        uint8_t *ptr;
+                        int x, y, h, v, linesize;
+                        h = s->mjpeg_hsample[i];
+                        v = s->mjpeg_vsample[i];
+                        linesize= p->linesize[i];
+
+                        for(y=0; y<v; y++){
+                            for(x=0; x<h; x++){
+                                int pred;
+
+                                ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
+//printf("%d %d %d %d %8X\n", mb_x, mb_y, x, y, ptr);
+                                PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
+
+                                if(i==0)
+                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
+                                else
+                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    emms_c();
+
+    mjpeg_picture_trailer(s);
+    s->picture_number++;
+
+    flush_put_bits(&s->pb);
+    return pbBufPtr(&s->pb) - s->pb.buf;
+//    return (put_bits_count(&f->pb)+7)/8;
+}
+
+
+AVCodec ljpeg_encoder = { //FIXME avoid MPV_* lossless jpeg shouldnt need them
+    "ljpeg",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_LJPEG,
+    sizeof(MpegEncContext),
+    MPV_encode_init,
+    encode_picture_lossless,
+    MPV_encode_end,
+};