diff options
Diffstat (limited to 'ffmpeg/libavcodec/aac_adtstoasc_bsf.c')
| -rw-r--r-- | ffmpeg/libavcodec/aac_adtstoasc_bsf.c | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/ffmpeg/libavcodec/aac_adtstoasc_bsf.c b/ffmpeg/libavcodec/aac_adtstoasc_bsf.c deleted file mode 100644 index c8f9e0a..0000000 --- a/ffmpeg/libavcodec/aac_adtstoasc_bsf.c +++ /dev/null @@ -1,118 +0,0 @@ -/* - * 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 -1; - } - - 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; - } - avctx->extradata_size = 2 + pce_size; - avctx->extradata = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); - - 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, -}; |