d0492578c8
* qatar/master: presets: rename presets directory lavc: make avcodec_get_context_defaults3 "officially" public lavf: replace av_new_stream->avformat_new_stream part II. lavf,lavd: replace av_new_stream->avformat_new_stream part I. lavf: add avformat_new_stream as a replacement for av_new_stream. Use correct scaling table for bwd-pred MVs in second B-field Ut Video decoder Makefile: change presets extension to .avpreset lavfi: add rgbtestsrc source, ported from MPlayer libmpcodecs lavfi: add testsrc source AVOptions: add documentation. presets: update libx264 ffpresets Conflicts: Changelog doc/APIchanges doc/ffmpeg.texi ffpresets/libx264-ipod320.ffpreset ffpresets/libx264-ipod640.ffpreset ffserver.c libavcodec/avcodec.h libavcodec/options.c libavcodec/version.h libavdevice/libdc1394.c libavfilter/avfilter.h libavfilter/vsrc_testsrc.c libavformat/flvdec.c libavformat/riff.c libavformat/version.h libavformat/wtv.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
/*
|
|
* raw ADTS AAC demuxer
|
|
* Copyright (c) 2008 Michael Niedermayer <michaelni@gmx.at>
|
|
* Copyright (c) 2009 Robert Swain ( rob opendot cl )
|
|
*
|
|
* 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 "libavutil/intreadwrite.h"
|
|
#include "avformat.h"
|
|
#include "rawdec.h"
|
|
#include "id3v1.h"
|
|
|
|
|
|
static int adts_aac_probe(AVProbeData *p)
|
|
{
|
|
int max_frames = 0, first_frames = 0;
|
|
int fsize, frames;
|
|
uint8_t *buf0 = p->buf;
|
|
uint8_t *buf2;
|
|
uint8_t *buf;
|
|
uint8_t *end = buf0 + p->buf_size - 7;
|
|
|
|
buf = buf0;
|
|
|
|
for(; buf < end; buf= buf2+1) {
|
|
buf2 = buf;
|
|
|
|
for(frames = 0; buf2 < end; frames++) {
|
|
uint32_t header = AV_RB16(buf2);
|
|
if((header&0xFFF6) != 0xFFF0)
|
|
break;
|
|
fsize = (AV_RB32(buf2 + 3) >> 13) & 0x1FFF;
|
|
if(fsize < 7)
|
|
break;
|
|
fsize = FFMIN(fsize, end - buf2);
|
|
buf2 += fsize;
|
|
}
|
|
max_frames = FFMAX(max_frames, frames);
|
|
if(buf == buf0)
|
|
first_frames= frames;
|
|
}
|
|
if (first_frames>=3) return AVPROBE_SCORE_MAX/2+1;
|
|
else if(max_frames>500)return AVPROBE_SCORE_MAX/2;
|
|
else if(max_frames>=3) return AVPROBE_SCORE_MAX/4;
|
|
else if(max_frames>=1) return 1;
|
|
else return 0;
|
|
}
|
|
|
|
static int adts_aac_read_header(AVFormatContext *s,
|
|
AVFormatParameters *ap)
|
|
{
|
|
AVStream *st;
|
|
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->codec->codec_id = s->iformat->value;
|
|
st->need_parsing = AVSTREAM_PARSE_FULL;
|
|
|
|
ff_id3v1_read(s);
|
|
|
|
//LCM of all possible ADTS sample rates
|
|
av_set_pts_info(st, 64, 1, 28224000);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat ff_aac_demuxer = {
|
|
.name = "aac",
|
|
.long_name = NULL_IF_CONFIG_SMALL("raw ADTS AAC"),
|
|
.read_probe = adts_aac_probe,
|
|
.read_header = adts_aac_read_header,
|
|
.read_packet = ff_raw_read_partial_packet,
|
|
.flags= AVFMT_GENERIC_INDEX,
|
|
.extensions = "aac",
|
|
.value = CODEC_ID_AAC,
|
|
};
|