mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-19 15:55:06 +02:00
988f585fcb
* qatar/master: (44 commits) replacement Indeo 3 decoder gsm demuxer: do not allocate packet twice. flvenc: use first packet delay as global delay. ac3enc: doxygen update. imc: return error codes instead of 0 for error conditions. imc: return meaningful error codes instead of -1 imc: do not set channel layout for stereo imc: validate channel count imc: check for ff_fft_init() failure imc: check output buffer size before decoding imc: use DSPContext.bswap16_buf() to byte-swap packet data rtsp: add allowed_media_types option libgsm: add flush function to reset the decoder state when seeking libgsm: simplify decoding by using a loop gsm: log error message when packet is too small libgsmdec: do not needlessly set *data_size to 0 gsmdec: do not needlessly set *data_size to 0 gsmdec: add flush function to reset the decoder state when seeking libgsmdec: check output buffer size before decoding gsmdec: log error message when output buffer is too small. ... Conflicts: Changelog ffplay.c libavcodec/indeo3.c libavcodec/mjpeg_parser.c libavcodec/vp3.c libavformat/cutils.c libavformat/id3v2.c libavutil/parseutils.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/*
|
|
* Audio and Video frame extraction
|
|
* Copyright (c) 2003 Fabrice Bellard
|
|
* Copyright (c) 2003 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 "parser.h"
|
|
#include "aac_ac3_parser.h"
|
|
#include "aacadtsdec.h"
|
|
#include "get_bits.h"
|
|
#include "mpeg4audio.h"
|
|
|
|
static int aac_sync(uint64_t state, AACAC3ParseContext *hdr_info,
|
|
int *need_next_header, int *new_frame_start)
|
|
{
|
|
GetBitContext bits;
|
|
AACADTSHeaderInfo hdr;
|
|
int size;
|
|
union {
|
|
uint64_t u64;
|
|
uint8_t u8[8];
|
|
} tmp;
|
|
|
|
tmp.u64 = av_be2ne64(state);
|
|
init_get_bits(&bits, tmp.u8+8-AAC_ADTS_HEADER_SIZE, AAC_ADTS_HEADER_SIZE * 8);
|
|
|
|
if ((size = avpriv_aac_parse_header(&bits, &hdr)) < 0)
|
|
return 0;
|
|
*need_next_header = 0;
|
|
*new_frame_start = 1;
|
|
hdr_info->sample_rate = hdr.sample_rate;
|
|
hdr_info->channels = ff_mpeg4audio_channels[hdr.chan_config];
|
|
hdr_info->samples = hdr.samples;
|
|
hdr_info->bit_rate = hdr.bit_rate;
|
|
return size;
|
|
}
|
|
|
|
static av_cold int aac_parse_init(AVCodecParserContext *s1)
|
|
{
|
|
AACAC3ParseContext *s = s1->priv_data;
|
|
s->header_size = AAC_ADTS_HEADER_SIZE;
|
|
s->sync = aac_sync;
|
|
return 0;
|
|
}
|
|
|
|
|
|
AVCodecParser ff_aac_parser = {
|
|
.codec_ids = { CODEC_ID_AAC },
|
|
.priv_data_size = sizeof(AACAC3ParseContext),
|
|
.parser_init = aac_parse_init,
|
|
.parser_parse = ff_aac_ac3_parse,
|
|
.parser_close = ff_parse_close,
|
|
};
|