x86: cabac: add operand size suffixes missing from 6c32576
[libav.git] / libavcodec / msrle.c
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1/*
2 * Micrsoft RLE Video Decoder
3 * Copyright (C) 2003 the ffmpeg project
4 *
2912e87a 5 * This file is part of Libav.
b78e7197 6 *
2912e87a 7 * Libav is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
2fdf638b 11 *
2912e87a 12 * Libav is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
2912e87a 18 * License along with Libav; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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20 */
21
22/**
ba87f080 23 * @file
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24 * MS RLE Video Decoder by Mike Melanson (melanson@pcisys.net)
25 * For more information about the MS RLE format, visit:
26 * http://www.pcisys.net/~melanson/codecs/
27 *
28 * The MS RLE decoder outputs PAL8 colorspace data.
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29 */
30
31#include <stdio.h>
32#include <stdlib.h>
33#include <string.h>
2fdf638b 34
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35#include "avcodec.h"
36#include "dsputil.h"
44aa9771 37#include "msrledec.h"
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38
39typedef struct MsrleContext {
40 AVCodecContext *avctx;
41 AVFrame frame;
2fdf638b 42
7993df65 43 const unsigned char *buf;
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44 int size;
45
2d8591c2 46 uint32_t pal[256];
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47} MsrleContext;
48
98a6fff9 49static av_cold int msrle_decode_init(AVCodecContext *avctx)
2fdf638b 50{
e4141433 51 MsrleContext *s = avctx->priv_data;
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52
53 s->avctx = avctx;
54
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55 switch (avctx->bits_per_coded_sample) {
56 case 4:
57 case 8:
58 avctx->pix_fmt = PIX_FMT_PAL8;
59 break;
60 case 24:
61 avctx->pix_fmt = PIX_FMT_BGR24;
62 break;
63 default:
64 av_log(avctx, AV_LOG_ERROR, "unsupported bits per sample\n");
65 return -1;
66 }
67
e1c2a5a0 68 s->frame.data[0] = NULL;
2fdf638b 69
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70 return 0;
71}
72
73static int msrle_decode_frame(AVCodecContext *avctx,
74 void *data, int *data_size,
7a00bbad 75 AVPacket *avpkt)
2fdf638b 76{
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77 const uint8_t *buf = avpkt->data;
78 int buf_size = avpkt->size;
e4141433 79 MsrleContext *s = avctx->priv_data;
2ed16f30 80 int istride = FFALIGN(avctx->width*avctx->bits_per_coded_sample, 32) / 8;
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81
82 s->buf = buf;
83 s->size = buf_size;
84
04939fb7 85 s->frame.reference = 1;
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86 s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
87 if (avctx->reget_buffer(avctx, &s->frame)) {
88 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
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89 return -1;
90 }
91
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92 if (avctx->bits_per_coded_sample <= 8) {
93 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
94
95 if (pal) {
30853173 96 s->frame.palette_has_changed = 1;
2d8591c2 97 memcpy(s->pal, pal, AVPALETTE_SIZE);
30853173 98 }
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99
100 /* make the palette available */
101 memcpy(s->frame.data[1], s->pal, AVPALETTE_SIZE);
a7e56229 102 }
2fdf638b 103
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104 /* FIXME how to correctly detect RLE ??? */
105 if (avctx->height * istride == avpkt->size) { /* assume uncompressed */
106 int linesize = avctx->width * avctx->bits_per_coded_sample / 8;
107 uint8_t *ptr = s->frame.data[0];
108 uint8_t *buf = avpkt->data + (avctx->height-1)*istride;
109 int i, j;
110
111 for (i = 0; i < avctx->height; i++) {
112 if (avctx->bits_per_coded_sample == 4) {
113 for (j = 0; j < avctx->width - 1; j += 2) {
114 ptr[j+0] = buf[j>>1] >> 4;
115 ptr[j+1] = buf[j>>1] & 0xF;
116 }
117 if (avctx->width & 1)
118 ptr[j+0] = buf[j>>1] >> 4;
119 } else {
120 memcpy(ptr, buf, linesize);
121 }
122 buf -= istride;
123 ptr += s->frame.linesize[0];
124 }
125 } else {
126 ff_msrle_decode(avctx, (AVPicture*)&s->frame, avctx->bits_per_coded_sample, buf, buf_size);
127 }
44aa9771 128
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129 *data_size = sizeof(AVFrame);
130 *(AVFrame*)data = s->frame;
131
132 /* report that the buffer was completely consumed */
133 return buf_size;
134}
135
98a6fff9 136static av_cold int msrle_decode_end(AVCodecContext *avctx)
2fdf638b 137{
e4141433 138 MsrleContext *s = avctx->priv_data;
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139
140 /* release the last frame */
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141 if (s->frame.data[0])
142 avctx->release_buffer(avctx, &s->frame);
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143
144 return 0;
145}
146
d36beb3f 147AVCodec ff_msrle_decoder = {
2fdf638b 148 "msrle",
72415b2a 149 AVMEDIA_TYPE_VIDEO,
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150 CODEC_ID_MSRLE,
151 sizeof(MsrleContext),
152 msrle_decode_init,
153 NULL,
154 msrle_decode_end,
155 msrle_decode_frame,
e1c2a5a0 156 CODEC_CAP_DR1,
fe4bf374 157 .long_name= NULL_IF_CONFIG_SMALL("Microsoft RLE"),
2fdf638b 158};