mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-07-16 01:11:38 +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>
71 lines
2.2 KiB
C
71 lines
2.2 KiB
C
/*
|
|
* RAW H.264 video demuxer
|
|
* Copyright (c) 2008 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"
|
|
|
|
static int h264_probe(AVProbeData *p)
|
|
{
|
|
uint32_t code= -1;
|
|
int sps=0, pps=0, idr=0, res=0, sli=0;
|
|
int i;
|
|
|
|
for(i=0; i<p->buf_size; i++){
|
|
code = (code<<8) + p->buf[i];
|
|
if ((code & 0xffffff00) == 0x100) {
|
|
int ref_idc= (code>>5)&3;
|
|
int type = code & 0x1F;
|
|
static const int8_t ref_zero[32]={
|
|
2, 0, 0, 0, 0,-1, 1,-1,
|
|
-1, 1, 1, 1, 1,-1, 2, 2,
|
|
2, 2, 2, 0, 2, 2, 2, 2,
|
|
2, 2, 2, 2, 2, 2, 2, 2
|
|
};
|
|
|
|
if(code & 0x80) //forbidden bit
|
|
return 0;
|
|
|
|
if(ref_zero[type] == 1 && ref_idc)
|
|
return 0;
|
|
if(ref_zero[type] ==-1 && !ref_idc)
|
|
return 0;
|
|
if(ref_zero[type] == 2)
|
|
res++;
|
|
|
|
switch(type){
|
|
case 1: sli++; break;
|
|
case 5: idr++; break;
|
|
case 7:
|
|
if(p->buf[i+2]&0x03)
|
|
return 0;
|
|
sps++;
|
|
break;
|
|
case 8: pps++; break;
|
|
}
|
|
}
|
|
}
|
|
if(sps && pps && (idr||sli>3) && res<(sps+pps+idr))
|
|
return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
|
|
return 0;
|
|
}
|
|
|
|
FF_DEF_RAWVIDEO_DEMUXER(h264 , "raw H.264 video format", h264_probe, "h26l,h264,264", CODEC_ID_H264)
|