mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-09-14 02:53:37 +02:00
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>
53 lines
2.0 KiB
C
53 lines
2.0 KiB
C
/*
|
|
* RAW MPEG-4 video demuxer
|
|
* Copyright (c) 2006 Thijs Vermeir <thijs.vermeir@barco.com>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "avformat.h"
|
|
#include "rawdec.h"
|
|
|
|
#define VISUAL_OBJECT_START_CODE 0x000001b5
|
|
#define VOP_START_CODE 0x000001b6
|
|
|
|
static int mpeg4video_probe(AVProbeData *probe_packet)
|
|
{
|
|
uint32_t temp_buffer= -1;
|
|
int VO=0, VOL=0, VOP = 0, VISO = 0, res=0;
|
|
int i;
|
|
|
|
for(i=0; i<probe_packet->buf_size; i++){
|
|
temp_buffer = (temp_buffer<<8) + probe_packet->buf[i];
|
|
if ((temp_buffer & 0xffffff00) != 0x100)
|
|
continue;
|
|
|
|
if (temp_buffer == VOP_START_CODE) VOP++;
|
|
else if (temp_buffer == VISUAL_OBJECT_START_CODE) VISO++;
|
|
else if (temp_buffer < 0x120) VO++;
|
|
else if (temp_buffer < 0x130) VOL++;
|
|
else if ( !(0x1AF < temp_buffer && temp_buffer < 0x1B7)
|
|
&& !(0x1B9 < temp_buffer && temp_buffer < 0x1C4)) res++;
|
|
}
|
|
|
|
if (VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res==0)
|
|
return VOP+VO > 3 ? AVPROBE_SCORE_MAX/2 : AVPROBE_SCORE_MAX/4;
|
|
return 0;
|
|
}
|
|
|
|
FF_DEF_RAWVIDEO_DEMUXER(m4v, "raw MPEG-4 video", mpeg4video_probe, "m4v", AV_CODEC_ID_MPEG4)
|