3 * Copyright (C) 2005 the ffmpeg project
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Autodesk RLE Video Decoder by Konstantin Shishkov
35 typedef struct AascContext {
36 AVCodecContext *avctx;
41 static av_cold int aasc_decode_init(AVCodecContext *avctx)
43 AascContext *s = avctx->priv_data;
46 switch (avctx->bits_per_coded_sample) {
48 avctx->pix_fmt = PIX_FMT_RGB555;
51 avctx->pix_fmt = PIX_FMT_BGR24;
54 av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n", avctx->bits_per_coded_sample);
57 avcodec_get_frame_defaults(&s->frame);
62 static int aasc_decode_frame(AVCodecContext *avctx,
63 void *data, int *data_size,
66 const uint8_t *buf = avpkt->data;
67 int buf_size = avpkt->size;
68 AascContext *s = avctx->priv_data;
71 s->frame.reference = 3;
72 s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
73 if (avctx->reget_buffer(avctx, &s->frame)) {
74 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
81 switch (avctx->codec_tag) {
82 case MKTAG('A', 'A', 'S', '4'):
83 bytestream2_init(&s->gb, buf - 4, buf_size + 4);
84 ff_msrle_decode(avctx, (AVPicture*)&s->frame, 8, &s->gb);
86 case MKTAG('A', 'A', 'S', 'C'):
89 stride = (avctx->width * 3 + 3) & ~3;
90 for(i = avctx->height - 1; i >= 0; i--){
91 if(avctx->width*3 > buf_size){
92 av_log(avctx, AV_LOG_ERROR, "Next line is beyond buffer bounds\n");
95 memcpy(s->frame.data[0] + i*s->frame.linesize[0], buf, avctx->width*3);
101 bytestream2_init(&s->gb, buf, buf_size);
102 ff_msrle_decode(avctx, (AVPicture*)&s->frame, 8, &s->gb);
105 av_log(avctx, AV_LOG_ERROR, "Unknown compression type %d\n", compr);
110 av_log(avctx, AV_LOG_ERROR, "Unknown FourCC: %X\n", avctx->codec_tag);
114 *data_size = sizeof(AVFrame);
115 *(AVFrame*)data = s->frame;
117 /* report that the buffer was completely consumed */
121 static av_cold int aasc_decode_end(AVCodecContext *avctx)
123 AascContext *s = avctx->priv_data;
125 /* release the last frame */
126 if (s->frame.data[0])
127 avctx->release_buffer(avctx, &s->frame);
132 AVCodec ff_aasc_decoder = {
134 .type = AVMEDIA_TYPE_VIDEO,
136 .priv_data_size = sizeof(AascContext),
137 .init = aasc_decode_init,
138 .close = aasc_decode_end,
139 .decode = aasc_decode_frame,
140 .capabilities = CODEC_CAP_DR1,
141 .long_name = NULL_IF_CONFIG_SMALL("Autodesk RLE"),