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7a72695c05
* commit '36ef5369ee9b336febc2c270f8718cec4476cb85': Replace all CODEC_ID_* with AV_CODEC_ID_* lavc: add AV prefix to codec ids. Conflicts: doc/APIchanges doc/examples/decoding_encoding.c doc/examples/muxing.c ffmpeg.c ffprobe.c ffserver.c libavcodec/8svx.c libavcodec/avcodec.h libavcodec/dnxhd_parser.c libavcodec/dvdsubdec.c libavcodec/error_resilience.c libavcodec/h263dec.c libavcodec/libvorbisenc.c libavcodec/mjpeg_parser.c libavcodec/mjpegenc.c libavcodec/mpeg12.c libavcodec/mpeg4videodec.c libavcodec/mpegvideo.c libavcodec/mpegvideo_enc.c libavcodec/pcm.c libavcodec/r210dec.c libavcodec/utils.c libavcodec/v210dec.c libavcodec/version.h libavdevice/alsa-audio-dec.c libavdevice/bktr.c libavdevice/v4l2.c libavformat/asfdec.c libavformat/asfenc.c libavformat/avformat.h libavformat/avidec.c libavformat/caf.c libavformat/electronicarts.c libavformat/flacdec.c libavformat/flvdec.c libavformat/flvenc.c libavformat/framecrcenc.c libavformat/img2.c libavformat/img2dec.c libavformat/img2enc.c libavformat/ipmovie.c libavformat/isom.c libavformat/matroska.c libavformat/matroskadec.c libavformat/matroskaenc.c libavformat/mov.c libavformat/movenc.c libavformat/mp3dec.c libavformat/mpeg.c libavformat/mpegts.c libavformat/mxf.c libavformat/mxfdec.c libavformat/mxfenc.c libavformat/nsvdec.c libavformat/nut.c libavformat/oggenc.c libavformat/pmpdec.c libavformat/rawdec.c libavformat/rawenc.c libavformat/riff.c libavformat/sdp.c libavformat/utils.c libavformat/vocenc.c libavformat/wtv.c libavformat/xmv.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
/*
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* RAW Chinese AVS video demuxer
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* Copyright (c) 2009 Stefan Gehrer <stefan.gehrer@gmx.de>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avformat.h"
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#include "rawdec.h"
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#define CAVS_SEQ_START_CODE 0x000001b0
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#define CAVS_PIC_I_START_CODE 0x000001b3
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#define CAVS_UNDEF_START_CODE 0x000001b4
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#define CAVS_PIC_PB_START_CODE 0x000001b6
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#define CAVS_VIDEO_EDIT_CODE 0x000001b7
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#define CAVS_PROFILE_JIZHUN 0x20
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static int cavsvideo_probe(AVProbeData *p)
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{
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uint32_t code= -1;
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int pic=0, seq=0, slice_pos = 0;
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int i;
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for(i=0; i<p->buf_size; i++){
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code = (code<<8) + p->buf[i];
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if ((code & 0xffffff00) == 0x100) {
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if(code < CAVS_SEQ_START_CODE) {
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/* slices have to be consecutive */
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if(code < slice_pos)
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return 0;
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slice_pos = code;
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} else {
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slice_pos = 0;
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}
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if (code == CAVS_SEQ_START_CODE) {
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seq++;
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/* check for the only currently supported profile */
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if(p->buf[i+1] != CAVS_PROFILE_JIZHUN)
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return 0;
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} else if ((code == CAVS_PIC_I_START_CODE) ||
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(code == CAVS_PIC_PB_START_CODE)) {
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pic++;
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} else if ((code == CAVS_UNDEF_START_CODE) ||
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(code > CAVS_VIDEO_EDIT_CODE)) {
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return 0;
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}
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}
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}
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if(seq && seq*9<=pic*10)
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return AVPROBE_SCORE_MAX/2;
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return 0;
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}
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FF_DEF_RAWVIDEO_DEMUXER(cavsvideo, "raw Chinese AVS (Audio Video Standard)", cavsvideo_probe, NULL, AV_CODEC_ID_CAVS)
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