FFmpeg/libavcodec/aac_adtstoasc_bsf.c
Michael Niedermayer 29d147c94d Merge commit '059a934806d61f7af9ab3fd9f74994b838ea5eba'
* commit '059a934806d61f7af9ab3fd9f74994b838ea5eba':
  lavc: Consistently prefix input buffer defines

Conflicts:
	doc/examples/decoding_encoding.c
	libavcodec/4xm.c
	libavcodec/aac_adtstoasc_bsf.c
	libavcodec/aacdec.c
	libavcodec/aacenc.c
	libavcodec/ac3dec.h
	libavcodec/asvenc.c
	libavcodec/avcodec.h
	libavcodec/avpacket.c
	libavcodec/dvdec.c
	libavcodec/ffv1enc.c
	libavcodec/g2meet.c
	libavcodec/gif.c
	libavcodec/h264.c
	libavcodec/h264_mp4toannexb_bsf.c
	libavcodec/huffyuvdec.c
	libavcodec/huffyuvenc.c
	libavcodec/jpeglsenc.c
	libavcodec/libxvid.c
	libavcodec/mdec.c
	libavcodec/motionpixels.c
	libavcodec/mpeg4videodec.c
	libavcodec/mpegvideo.c
	libavcodec/noise_bsf.c
	libavcodec/nuv.c
	libavcodec/nvenc.c
	libavcodec/options.c
	libavcodec/parser.c
	libavcodec/pngenc.c
	libavcodec/proresenc_kostya.c
	libavcodec/qsvdec.c
	libavcodec/svq1enc.c
	libavcodec/tiffenc.c
	libavcodec/truemotion2.c
	libavcodec/utils.c
	libavcodec/utvideoenc.c
	libavcodec/vc1dec.c
	libavcodec/wmalosslessdec.c
	libavformat/adxdec.c
	libavformat/aiffdec.c
	libavformat/apc.c
	libavformat/apetag.c
	libavformat/avidec.c
	libavformat/bink.c
	libavformat/cafdec.c
	libavformat/flvdec.c
	libavformat/id3v2.c
	libavformat/isom.c
	libavformat/matroskadec.c
	libavformat/mov.c
	libavformat/mpc.c
	libavformat/mpc8.c
	libavformat/mpegts.c
	libavformat/mvi.c
	libavformat/mxfdec.c
	libavformat/mxg.c
	libavformat/nutdec.c
	libavformat/oggdec.c
	libavformat/oggparsecelt.c
	libavformat/oggparseflac.c
	libavformat/oggparseopus.c
	libavformat/oggparsespeex.c
	libavformat/omadec.c
	libavformat/rawdec.c
	libavformat/riffdec.c
	libavformat/rl2.c
	libavformat/rmdec.c
	libavformat/rtpdec_latm.c
	libavformat/rtpdec_mpeg4.c
	libavformat/rtpdec_qdm2.c
	libavformat/rtpdec_svq3.c
	libavformat/sierravmd.c
	libavformat/smacker.c
	libavformat/smush.c
	libavformat/spdifenc.c
	libavformat/takdec.c
	libavformat/tta.c
	libavformat/utils.c
	libavformat/vqf.c
	libavformat/westwood_vqa.c
	libavformat/xmv.c
	libavformat/xwma.c
	libavformat/yop.c

Merged-by: Michael Niedermayer <michael@niedermayer.cc>
2015-07-27 23:15:19 +02:00

124 lines
4.2 KiB
C

/*
* MPEG-2/4 AAC ADTS to MPEG-4 Audio Specific Configuration bitstream filter
* Copyright (c) 2009 Alex Converse <alex.converse@gmail.com>
*
* 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 "avcodec.h"
#include "aacadtsdec.h"
#include "put_bits.h"
#include "get_bits.h"
#include "mpeg4audio.h"
#include "internal.h"
typedef struct AACBSFContext {
int first_frame_done;
} AACBSFContext;
/**
* This filter creates an MPEG-4 AudioSpecificConfig from an MPEG-2/4
* ADTS header and removes the ADTS header.
*/
static int aac_adtstoasc_filter(AVBitStreamFilterContext *bsfc,
AVCodecContext *avctx, const char *args,
uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size,
int keyframe)
{
GetBitContext gb;
PutBitContext pb;
AACADTSHeaderInfo hdr;
AACBSFContext *ctx = bsfc->priv_data;
init_get_bits(&gb, buf, AAC_ADTS_HEADER_SIZE*8);
*poutbuf = (uint8_t*) buf;
*poutbuf_size = buf_size;
if (avctx->extradata)
if (show_bits(&gb, 12) != 0xfff)
return 0;
if (avpriv_aac_parse_header(&gb, &hdr) < 0) {
av_log(avctx, AV_LOG_ERROR, "Error parsing ADTS frame header!\n");
return AVERROR_INVALIDDATA;
}
if (!hdr.crc_absent && hdr.num_aac_frames > 1) {
avpriv_report_missing_feature(avctx,
"Multiple RDBs per frame with CRC");
return AVERROR_PATCHWELCOME;
}
buf += AAC_ADTS_HEADER_SIZE + 2*!hdr.crc_absent;
buf_size -= AAC_ADTS_HEADER_SIZE + 2*!hdr.crc_absent;
if (!ctx->first_frame_done) {
int pce_size = 0;
uint8_t pce_data[MAX_PCE_SIZE];
if (!hdr.chan_config) {
init_get_bits(&gb, buf, buf_size * 8);
if (get_bits(&gb, 3) != 5) {
avpriv_report_missing_feature(avctx,
"PCE-based channel configuration "
"without PCE as first syntax "
"element");
return AVERROR_PATCHWELCOME;
}
init_put_bits(&pb, pce_data, MAX_PCE_SIZE);
pce_size = avpriv_copy_pce_data(&pb, &gb)/8;
flush_put_bits(&pb);
buf_size -= get_bits_count(&gb)/8;
buf += get_bits_count(&gb)/8;
}
av_free(avctx->extradata);
avctx->extradata_size = 2 + pce_size;
avctx->extradata = av_mallocz(avctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!avctx->extradata) {
avctx->extradata_size = 0;
return AVERROR(ENOMEM);
}
init_put_bits(&pb, avctx->extradata, avctx->extradata_size);
put_bits(&pb, 5, hdr.object_type);
put_bits(&pb, 4, hdr.sampling_index);
put_bits(&pb, 4, hdr.chan_config);
put_bits(&pb, 1, 0); //frame length - 1024 samples
put_bits(&pb, 1, 0); //does not depend on core coder
put_bits(&pb, 1, 0); //is not extension
flush_put_bits(&pb);
if (pce_size) {
memcpy(avctx->extradata + 2, pce_data, pce_size);
}
ctx->first_frame_done = 1;
}
*poutbuf = (uint8_t*) buf;
*poutbuf_size = buf_size;
return 0;
}
AVBitStreamFilter ff_aac_adtstoasc_bsf = {
.name = "aac_adtstoasc",
.priv_data_size = sizeof(AACBSFContext),
.filter = aac_adtstoasc_filter,
};