libavcodec/iff.c

   1 /*
   2  * IFF PBM/ILBM bitmap decoder
   3  * Copyright (c) 2010 Peter Ross <pross@xvid.org>
   4  * Copyright (c) 2010 Sebastian Vater <cdgs.basty@googlemail.com>
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 /**
  24  * @file
  25  * IFF PBM/ILBM bitmap decoder
  26  */
  27
  28 #include "bytestream.h"
  29 #include "avcodec.h"
  30 #include "get_bits.h"
  31 #include "iff.h"
  32
  33 typedef struct {
  34     AVFrame frame;
  35     int planesize;
  36     uint8_t * planebuf;
  37 } IffContext;
  38
  39 #define LUT8_PART(plane, v)                             \
  40     AV_LE2ME64C(UINT64_C(0x0000000)<<32 | v) << plane,  \
  41     AV_LE2ME64C(UINT64_C(0x1000000)<<32 | v) << plane,  \
  42     AV_LE2ME64C(UINT64_C(0x0010000)<<32 | v) << plane,  \
  43     AV_LE2ME64C(UINT64_C(0x1010000)<<32 | v) << plane,  \
  44     AV_LE2ME64C(UINT64_C(0x0000100)<<32 | v) << plane,  \
  45     AV_LE2ME64C(UINT64_C(0x1000100)<<32 | v) << plane,  \
  46     AV_LE2ME64C(UINT64_C(0x0010100)<<32 | v) << plane,  \
  47     AV_LE2ME64C(UINT64_C(0x1010100)<<32 | v) << plane,  \
  48     AV_LE2ME64C(UINT64_C(0x0000001)<<32 | v) << plane,  \
  49     AV_LE2ME64C(UINT64_C(0x1000001)<<32 | v) << plane,  \
  50     AV_LE2ME64C(UINT64_C(0x0010001)<<32 | v) << plane,  \
  51     AV_LE2ME64C(UINT64_C(0x1010001)<<32 | v) << plane,  \
  52     AV_LE2ME64C(UINT64_C(0x0000101)<<32 | v) << plane,  \
  53     AV_LE2ME64C(UINT64_C(0x1000101)<<32 | v) << plane,  \
  54     AV_LE2ME64C(UINT64_C(0x0010101)<<32 | v) << plane,  \
  55     AV_LE2ME64C(UINT64_C(0x1010101)<<32 | v) << plane
  56
  57 #define LUT8(plane) {                           \
  58     LUT8_PART(plane, 0x0000000),                \
  59     LUT8_PART(plane, 0x1000000),                \
  60     LUT8_PART(plane, 0x0010000),                \
  61     LUT8_PART(plane, 0x1010000),                \
  62     LUT8_PART(plane, 0x0000100),                \
  63     LUT8_PART(plane, 0x1000100),                \
  64     LUT8_PART(plane, 0x0010100),                \
  65     LUT8_PART(plane, 0x1010100),                \
  66     LUT8_PART(plane, 0x0000001),                \
  67     LUT8_PART(plane, 0x1000001),                \
  68     LUT8_PART(plane, 0x0010001),                \
  69     LUT8_PART(plane, 0x1010001),                \
  70     LUT8_PART(plane, 0x0000101),                \
  71     LUT8_PART(plane, 0x1000101),                \
  72     LUT8_PART(plane, 0x0010101),                \
  73     LUT8_PART(plane, 0x1010101),                \
  74 }
  75
  76 // 8 planes * 8-bit mask
  77 static const uint64_t plane8_lut[8][256] = {
  78     LUT8(0), LUT8(1), LUT8(2), LUT8(3),
  79     LUT8(4), LUT8(5), LUT8(6), LUT8(7),
  80 };
  81
  82 /**
  83  * Convert CMAP buffer (stored in extradata) to lavc palette format
  84  */
  85 int ff_cmap_read_palette(AVCodecContext *avctx, uint32_t *pal)
  86 {
  87     int count, i;
  88
  89     if (avctx->bits_per_coded_sample > 8) {
  90         av_log(avctx, AV_LOG_ERROR, "bit_per_coded_sample > 8 not supported\n");
  91         return AVERROR_INVALIDDATA;
  92     }
  93
  94     count = 1 << avctx->bits_per_coded_sample;
  95     if (avctx->extradata_size < count * 3) {
  96         av_log(avctx, AV_LOG_ERROR, "palette data underflow\n");
  97         return AVERROR_INVALIDDATA;
  98     }
  99     for (i=0; i < count; i++) {
 100         pal[i] = 0xFF000000 | AV_RB24( avctx->extradata + i*3 );
 101     }
 102     return 0;
 103 }
 104
 105 static av_cold int decode_init(AVCodecContext *avctx)
 106 {
 107     IffContext *s = avctx->priv_data;
 108     int err;
 109
 110     if (avctx->bits_per_coded_sample <= 8) {
 111         avctx->pix_fmt = PIX_FMT_PAL8;
 112     } else if (avctx->bits_per_coded_sample <= 32) {
 113         avctx->pix_fmt = PIX_FMT_BGR32;
 114     } else {
 115         return AVERROR_INVALIDDATA;
 116     }
 117
 118     s->planesize = FFALIGN(avctx->width, 16) >> 3; // Align plane size in bits to word-boundary
 119     s->planebuf = av_malloc(s->planesize + FF_INPUT_BUFFER_PADDING_SIZE);
 120     if (!s->planebuf)
 121         return AVERROR(ENOMEM);
 122
 123     s->frame.reference = 1;
 124     if ((err = avctx->get_buffer(avctx, &s->frame) < 0)) {
 125         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
 126         return err;
 127     }
 128
 129     return avctx->bits_per_coded_sample <= 8 ?
 130        ff_cmap_read_palette(avctx, (uint32_t*)s->frame.data[1]) : 0;
 131 }
 132
 133 /**
 134  * Decode interleaved plane buffer up to 8bpp
 135  * @param dst Destination buffer
 136  * @param buf Source buffer
 137  * @param buf_size
 138  * @param bps bits_per_coded_sample (must be <= 8)
 139  * @param plane plane number to decode as
 140  */
 141 static void decodeplane8(uint8_t *dst, const uint8_t *buf, int buf_size, int bps, int plane)
 142 {
 143     const uint64_t *lut = plane8_lut[plane];
 144     for(; --buf_size != 0; dst += 8) {
 145         uint64_t v = AV_RN64A(dst) | lut[*buf++];
 146         AV_WN64A(dst, v);
 147     }
 148 }
 149
 150 /**
 151  * Decode interleaved plane buffer up to 24bpp
 152  * @param dst Destination buffer
 153  * @param buf Source buffer
 154  * @param buf_size
 155  * @param bps bits_per_coded_sample
 156  * @param plane plane number to decode as
 157  */
 158 static void decodeplane32(uint32_t *dst, const uint8_t *const buf, int buf_size, int bps, int plane)
 159 {
 160     GetBitContext gb;
 161     int i;
 162     const int b = buf_size * 8;
 163     init_get_bits(&gb, buf, buf_size * 8);
 164     for(i = 0; i < b; i++) {
 165         dst[i] |= get_bits1(&gb) << plane;
 166     }
 167 }
 168
 169 static int decode_frame_ilbm(AVCodecContext *avctx,
 170                             void *data, int *data_size,
 171                             AVPacket *avpkt)
 172 {
 173     IffContext *s = avctx->priv_data;
 174     const uint8_t *buf = avpkt->data;
 175     int buf_size = avpkt->size;
 176     const uint8_t *buf_end = buf+buf_size;
 177     int y, plane;
 178
 179     if (avctx->reget_buffer(avctx, &s->frame) < 0){
 180         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
 181         return -1;
 182     }
 183
 184     if (avctx->pix_fmt == PIX_FMT_PAL8) {
 185         for(y = 0; y < avctx->height; y++ ) {
 186             uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
 187             memset(row, 0, avctx->width);
 188             for (plane = 0; plane < avctx->bits_per_coded_sample && buf < buf_end; plane++) {
 189                 decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), avctx->bits_per_coded_sample, plane);
 190                 buf += s->planesize;
 191             }
 192         }
 193     } else { // PIX_FMT_BGR32
 194         for(y = 0; y < avctx->height; y++ ) {
 195             uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
 196             memset(row, 0, avctx->width << 2);
 197             for (plane = 0; plane < avctx->bits_per_coded_sample && buf < buf_end; plane++) {
 198                 decodeplane32((uint32_t *) row, buf, FFMIN(s->planesize, buf_end - buf), avctx->bits_per_coded_sample, plane);
 199                 buf += s->planesize;
 200             }
 201         }
 202     }
 203
 204     *data_size = sizeof(AVFrame);
 205     *(AVFrame*)data = s->frame;
 206     return buf_size;
 207 }
 208
 209 static int decode_frame_byterun1(AVCodecContext *avctx,
 210                             void *data, int *data_size,
 211                             AVPacket *avpkt)
 212 {
 213     IffContext *s = avctx->priv_data;
 214     const uint8_t *buf = avpkt->data;
 215     int buf_size = avpkt->size;
 216     const uint8_t *buf_end = buf+buf_size;
 217     int y, plane, x;
 218
 219     if (avctx->reget_buffer(avctx, &s->frame) < 0){
 220         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
 221         return -1;
 222     }
 223
 224     if (avctx->codec_tag == MKTAG('I','L','B','M')) { //interleaved
 225         if (avctx->pix_fmt == PIX_FMT_PAL8) {
 226             for(y = 0; y < avctx->height ; y++ ) {
 227                 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
 228                 memset(row, 0, avctx->width);
 229                 for (plane = 0; plane < avctx->bits_per_coded_sample; plane++) {
 230                     for(x = 0; x < s->planesize && buf < buf_end; ) {
 231                         int8_t value = *buf++;
 232                         unsigned length;
 233                         if (value >= 0) {
 234                             length = value + 1;
 235                             memcpy(s->planebuf + x, buf, FFMIN3(length, s->planesize - x, buf_end - buf));
 236                             buf += length;
 237                         } else if (value > -128) {
 238                             length = -value + 1;
 239                             memset(s->planebuf + x, *buf++, FFMIN(length, s->planesize - x));
 240                         } else { //noop
 241                             continue;
 242                         }
 243                         x += length;
 244                     }
 245                     decodeplane8(row, s->planebuf, s->planesize, avctx->bits_per_coded_sample, plane);
 246                 }
 247             }
 248         } else { //PIX_FMT_BGR32
 249             for(y = 0; y < avctx->height ; y++ ) {
 250                 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
 251                 memset(row, 0, avctx->width << 2);
 252                 for (plane = 0; plane < avctx->bits_per_coded_sample; plane++) {
 253                     for(x = 0; x < s->planesize && buf < buf_end; ) {
 254                         int8_t value = *buf++;
 255                         unsigned length;
 256                         if (value >= 0) {
 257                             length = value + 1;
 258                             memcpy(s->planebuf + x, buf, FFMIN3(length, s->planesize - x, buf_end - buf));
 259                             buf += length;
 260                         } else if (value > -128) {
 261                             length = -value + 1;
 262                             memset(s->planebuf + x, *buf++, FFMIN(length, s->planesize - x));
 263                         } else { // noop
 264                             continue;
 265                         }
 266                         x += length;
 267                     }
 268                     decodeplane32((uint32_t *) row, s->planebuf, s->planesize, avctx->bits_per_coded_sample, plane);
 269                 }
 270             }
 271         }
 272     } else {
 273         for(y = 0; y < avctx->height ; y++ ) {
 274             uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
 275             for(x = 0; x < avctx->width && buf < buf_end; ) {
 276                 int8_t value = *buf++;
 277                 unsigned length;
 278                 if (value >= 0) {
 279                     length = value + 1;
 280                     memcpy(row + x, buf, FFMIN3(length, buf_end - buf, avctx->width - x));
 281                     buf += length;
 282                 } else if (value > -128) {
 283                     length = -value + 1;
 284                     memset(row + x, *buf++, FFMIN(length, avctx->width - x));
 285                 } else { //noop
 286                     continue;
 287                 }
 288                 x += length;
 289             }
 290         }
 291     }
 292
 293     *data_size = sizeof(AVFrame);
 294     *(AVFrame*)data = s->frame;
 295     return buf_size;
 296 }
 297
 298 static av_cold int decode_end(AVCodecContext *avctx)
 299 {
 300     IffContext *s = avctx->priv_data;
 301     if (s->frame.data[0])
 302         avctx->release_buffer(avctx, &s->frame);
 303     av_freep(&s->planebuf);
 304     return 0;
 305 }
 306
 307 AVCodec iff_ilbm_decoder = {
 308     "iff_ilbm",
 309     AVMEDIA_TYPE_VIDEO,
 310     CODEC_ID_IFF_ILBM,
 311     sizeof(IffContext),
 312     decode_init,
 313     NULL,
 314     decode_end,
 315     decode_frame_ilbm,
 316     CODEC_CAP_DR1,
 317     .long_name = NULL_IF_CONFIG_SMALL("IFF ILBM"),
 318 };
 319
 320 AVCodec iff_byterun1_decoder = {
 321     "iff_byterun1",
 322     AVMEDIA_TYPE_VIDEO,
 323     CODEC_ID_IFF_BYTERUN1,
 324     sizeof(IffContext),
 325     decode_init,
 326     NULL,
 327     decode_end,
 328     decode_frame_byterun1,
 329     CODEC_CAP_DR1,
 330     .long_name = NULL_IF_CONFIG_SMALL("IFF ByteRun1"),
 331 };