mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
8381ab1437
* qatar/master: (29 commits) ARM: disable ff_vector_fmul_vfp on VFPv3 systems ARM: check for VFPv3 swscale: Remove unused variables in x86 code. doc: Drop DJGPP section, Libav now compiles out-of-the-box on FreeDOS. x86: Add appropriate ifdefs around certain AVX functions. cmdutils: use sws_freeContext() instead of av_freep(). swscale: delay allocation of formatConvBuffer(). swscale: fix build with --disable-swscale-alpha. movenc: Deprecate the global RTP hinting flag, use a private AVOption instead movenc: Add an AVClass for setting muxer specific options swscale: fix non-bitexact yuv2yuv[X2]() MMX/MMX2 functions. configure: report yasm/nasm presence properly tcp: make connect() timeout properly rawdec: factor video demuxer definitions into a macro. rtspdec: add initial_pause private option. lavf: deprecate AVFormatParameters.width/height. tty: add video_size private option. rawdec: add video_size private option. x11grab: add video_size private option. x11grab: factorize returning error codes. ... Merged-by: Michael Niedermayer <michaelni@gmx.at>
59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
/*
|
|
* RAW MPEG video demuxer
|
|
* Copyright (c) 2002-2003 Fabrice Bellard
|
|
* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
|
|
*
|
|
* 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 SEQ_START_CODE 0x000001b3
|
|
#define GOP_START_CODE 0x000001b8
|
|
#define PICTURE_START_CODE 0x00000100
|
|
#define SLICE_START_CODE 0x00000101
|
|
#define PACK_START_CODE 0x000001ba
|
|
#define VIDEO_ID 0x000001e0
|
|
#define AUDIO_ID 0x000001c0
|
|
|
|
static int mpegvideo_probe(AVProbeData *p)
|
|
{
|
|
uint32_t code= -1;
|
|
int pic=0, seq=0, slice=0, pspack=0, pes=0;
|
|
int i;
|
|
|
|
for(i=0; i<p->buf_size; i++){
|
|
code = (code<<8) + p->buf[i];
|
|
if ((code & 0xffffff00) == 0x100) {
|
|
switch(code){
|
|
case SEQ_START_CODE: seq++; break;
|
|
case PICTURE_START_CODE: pic++; break;
|
|
case SLICE_START_CODE: slice++; break;
|
|
case PACK_START_CODE: pspack++; break;
|
|
}
|
|
if ((code & 0x1f0) == VIDEO_ID) pes++;
|
|
else if((code & 0x1e0) == AUDIO_ID) pes++;
|
|
}
|
|
}
|
|
if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes)
|
|
return pic>1 ? AVPROBE_SCORE_MAX/2+1 : AVPROBE_SCORE_MAX/4; // +1 for .mpg
|
|
return 0;
|
|
}
|
|
|
|
FF_DEF_RAWVIDEO_DEMUXER(mpegvideo, "raw MPEG video", mpegvideo_probe, NULL, CODEC_ID_MPEG1VIDEO)
|