From 8c51530fa1b71d11faf59f9ce7bb1cc4731becfe Mon Sep 17 00:00:00 2001 From: Aurelien Jacobs Date: Sun, 29 Aug 2010 20:36:23 +0000 Subject: move mpegvideo demuxer to its own file Originally committed as revision 24974 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavformat/mpegvideodec.c | 67 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 libavformat/mpegvideodec.c (limited to 'libavformat/mpegvideodec.c') diff --git a/libavformat/mpegvideodec.c b/libavformat/mpegvideodec.c new file mode 100644 index 0000000000..4700727680 --- /dev/null +++ b/libavformat/mpegvideodec.c @@ -0,0 +1,67 @@ +/* + * RAW MPEG video demuxer + * Copyright (c) 2002-2003 Fabrice Bellard + * Copyright (c) 2006 Michael Niedermayer + * + * 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 "raw.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; ibuf_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; +} + +AVInputFormat mpegvideo_demuxer = { + "mpegvideo", + NULL_IF_CONFIG_SMALL("raw MPEG video"), + 0, + mpegvideo_probe, + ff_raw_video_read_header, + ff_raw_read_partial_packet, + .flags= AVFMT_GENERIC_INDEX, + .value = CODEC_ID_MPEG1VIDEO, +}; -- cgit v1.2.1