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
23 * @file libavcodec/aasc.c
24 * Autodesk RLE Video Decoder by Konstantin Shishkov
35 typedef struct AascContext {
36 AVCodecContext *avctx;
40 #define FETCH_NEXT_STREAM_BYTE() \
41 if (stream_ptr >= buf_size) \
43 av_log(s->avctx, AV_LOG_ERROR, " AASC: stream ptr just went out of bounds (fetch)\n"); \
46 stream_byte = buf[stream_ptr++];
48 static av_cold int aasc_decode_init(AVCodecContext *avctx)
50 AascContext *s = avctx->priv_data;
54 avctx->pix_fmt = PIX_FMT_BGR24;
55 s->frame.data[0] = NULL;
60 static int aasc_decode_frame(AVCodecContext *avctx,
61 void *data, int *data_size,
62 const uint8_t *buf, int buf_size)
64 AascContext *s = avctx->priv_data;
67 s->frame.reference = 1;
68 s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
69 if (avctx->reget_buffer(avctx, &s->frame)) {
70 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
79 stride = (avctx->width * 3 + 3) & ~3;
80 for(i = avctx->height - 1; i >= 0; i--){
81 memcpy(s->frame.data[0] + i*s->frame.linesize[0], buf, avctx->width*3);
86 ff_msrle_decode(avctx, (AVPicture*)&s->frame, 8, buf - 4, buf_size + 4);
89 av_log(avctx, AV_LOG_ERROR, "Unknown compression type %d\n", compr);
93 *data_size = sizeof(AVFrame);
94 *(AVFrame*)data = s->frame;
96 /* report that the buffer was completely consumed */
100 static av_cold int aasc_decode_end(AVCodecContext *avctx)
102 AascContext *s = avctx->priv_data;
104 /* release the last frame */
105 if (s->frame.data[0])
106 avctx->release_buffer(avctx, &s->frame);
111 AVCodec aasc_decoder = {
121 .long_name = NULL_IF_CONFIG_SMALL("Autodesk RLE"),