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126 lines
3.8 KiB
126 lines
3.8 KiB
/* |
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* RAW aptX demuxer |
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* |
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* Copyright (C) 2017 Aurelien Jacobs <aurel@gnuage.org> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "config_components.h" |
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#include "libavutil/opt.h" |
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#include "avformat.h" |
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#define APTX_BLOCK_SIZE 4 |
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#define APTX_PACKET_SIZE (256*APTX_BLOCK_SIZE) |
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#define APTX_HD_BLOCK_SIZE 6 |
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#define APTX_HD_PACKET_SIZE (256*APTX_HD_BLOCK_SIZE) |
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typedef struct AptXDemuxerContext { |
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AVClass *class; |
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int sample_rate; |
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} AptXDemuxerContext; |
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static AVStream *aptx_read_header_common(AVFormatContext *s) |
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{ |
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AptXDemuxerContext *s1 = s->priv_data; |
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AVStream *st = avformat_new_stream(s, NULL); |
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if (!st) |
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return NULL; |
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
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st->codecpar->format = AV_SAMPLE_FMT_S32P; |
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st->codecpar->ch_layout.nb_channels = 2; |
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st->codecpar->sample_rate = s1->sample_rate; |
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st->start_time = 0; |
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return st; |
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} |
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static int aptx_read_header(AVFormatContext *s) |
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{ |
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AVStream *st = aptx_read_header_common(s); |
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if (!st) |
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return AVERROR(ENOMEM); |
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st->codecpar->codec_id = AV_CODEC_ID_APTX; |
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st->codecpar->bits_per_coded_sample = 4; |
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st->codecpar->block_align = APTX_BLOCK_SIZE; |
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return 0; |
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} |
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static int aptx_hd_read_header(AVFormatContext *s) |
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{ |
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AVStream *st = aptx_read_header_common(s); |
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if (!st) |
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return AVERROR(ENOMEM); |
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st->codecpar->codec_id = AV_CODEC_ID_APTX_HD; |
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st->codecpar->bits_per_coded_sample = 6; |
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st->codecpar->block_align = APTX_HD_BLOCK_SIZE; |
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return 0; |
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} |
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static int aptx_read_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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int ret = av_get_packet(s->pb, pkt, APTX_PACKET_SIZE); |
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if (ret >= 0 && !(ret % APTX_BLOCK_SIZE)) |
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pkt->flags &= ~AV_PKT_FLAG_CORRUPT; |
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return ret >= 0 ? 0 : ret; |
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} |
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static int aptx_hd_read_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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int ret = av_get_packet(s->pb, pkt, APTX_HD_PACKET_SIZE); |
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if (ret >= 0 && !(ret % APTX_HD_BLOCK_SIZE)) |
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pkt->flags &= ~AV_PKT_FLAG_CORRUPT; |
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return ret >= 0 ? 0 : ret; |
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} |
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static const AVOption aptx_options[] = { |
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{ "sample_rate", "", offsetof(AptXDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 48000}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, |
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{ NULL }, |
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}; |
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static const AVClass aptx_demuxer_class = { |
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.class_name = "aptx (hd) demuxer", |
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.option = aptx_options, |
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.version = LIBAVUTIL_VERSION_INT, |
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}; |
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#if CONFIG_APTX_DEMUXER |
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const AVInputFormat ff_aptx_demuxer = { |
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.name = "aptx", |
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.long_name = NULL_IF_CONFIG_SMALL("raw aptX"), |
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.extensions = "aptx", |
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.priv_data_size = sizeof(AptXDemuxerContext), |
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.read_header = aptx_read_header, |
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.read_packet = aptx_read_packet, |
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.flags = AVFMT_GENERIC_INDEX, |
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.priv_class = &aptx_demuxer_class, |
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}; |
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#endif |
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#if CONFIG_APTX_HD_DEMUXER |
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const AVInputFormat ff_aptx_hd_demuxer = { |
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.name = "aptx_hd", |
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.long_name = NULL_IF_CONFIG_SMALL("raw aptX HD"), |
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.extensions = "aptxhd", |
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.priv_data_size = sizeof(AptXDemuxerContext), |
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.read_header = aptx_hd_read_header, |
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.read_packet = aptx_hd_read_packet, |
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.flags = AVFMT_GENERIC_INDEX, |
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.priv_class = &aptx_demuxer_class, |
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}; |
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#endif
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