| /* |
| * RAW aptX demuxer |
| * |
| * Copyright (C) 2017 Aurelien Jacobs <aurel@gnuage.org> |
| * |
| * 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 "avformat.h" |
| #include "rawdec.h" |
| |
| #define APTX_BLOCK_SIZE 4 |
| #define APTX_PACKET_SIZE (256*APTX_BLOCK_SIZE) |
| |
| #define APTX_HD_BLOCK_SIZE 6 |
| #define APTX_HD_PACKET_SIZE (256*APTX_HD_BLOCK_SIZE) |
| |
| typedef struct AptXDemuxerContext { |
| AVClass *class; |
| int sample_rate; |
| } AptXDemuxerContext; |
| |
| static AVStream *aptx_read_header_common(AVFormatContext *s) |
| { |
| AptXDemuxerContext *s1 = s->priv_data; |
| AVStream *st = avformat_new_stream(s, NULL); |
| if (!st) |
| return NULL; |
| st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
| st->codecpar->format = AV_SAMPLE_FMT_S32P; |
| st->codecpar->channels = 2; |
| st->codecpar->sample_rate = s1->sample_rate; |
| st->start_time = 0; |
| return st; |
| } |
| |
| static int aptx_read_header(AVFormatContext *s) |
| { |
| AVStream *st = aptx_read_header_common(s); |
| if (!st) |
| return AVERROR(ENOMEM); |
| st->codecpar->codec_id = AV_CODEC_ID_APTX; |
| st->codecpar->bits_per_coded_sample = 4; |
| st->codecpar->block_align = APTX_BLOCK_SIZE; |
| st->codecpar->frame_size = APTX_PACKET_SIZE; |
| return 0; |
| } |
| |
| static int aptx_hd_read_header(AVFormatContext *s) |
| { |
| AVStream *st = aptx_read_header_common(s); |
| if (!st) |
| return AVERROR(ENOMEM); |
| st->codecpar->codec_id = AV_CODEC_ID_APTX_HD; |
| st->codecpar->bits_per_coded_sample = 6; |
| st->codecpar->block_align = APTX_HD_BLOCK_SIZE; |
| st->codecpar->frame_size = APTX_HD_PACKET_SIZE; |
| return 0; |
| } |
| |
| static int aptx_read_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| return av_get_packet(s->pb, pkt, APTX_PACKET_SIZE); |
| } |
| |
| static int aptx_hd_read_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| return av_get_packet(s->pb, pkt, APTX_HD_PACKET_SIZE); |
| } |
| |
| static const AVOption aptx_options[] = { |
| { "sample_rate", "", offsetof(AptXDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 48000}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, |
| { NULL }, |
| }; |
| |
| #if CONFIG_APTX_DEMUXER |
| static const AVClass aptx_demuxer_class = { |
| .class_name = "aptx demuxer", |
| .item_name = av_default_item_name, |
| .option = aptx_options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| AVInputFormat ff_aptx_demuxer = { |
| .name = "aptx", |
| .long_name = NULL_IF_CONFIG_SMALL("raw aptX"), |
| .extensions = "aptx", |
| .priv_data_size = sizeof(AptXDemuxerContext), |
| .read_header = aptx_read_header, |
| .read_packet = aptx_read_packet, |
| .flags = AVFMT_GENERIC_INDEX, |
| .priv_class = &aptx_demuxer_class, |
| }; |
| #endif |
| |
| #if CONFIG_APTX_HD_DEMUXER |
| static const AVClass aptx_hd_demuxer_class = { |
| .class_name = "aptx hd demuxer", |
| .item_name = av_default_item_name, |
| .option = aptx_options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| AVInputFormat ff_aptx_hd_demuxer = { |
| .name = "aptx_hd", |
| .long_name = NULL_IF_CONFIG_SMALL("raw aptX HD"), |
| .extensions = "aptxhd", |
| .priv_data_size = sizeof(AptXDemuxerContext), |
| .read_header = aptx_hd_read_header, |
| .read_packet = aptx_hd_read_packet, |
| .flags = AVFMT_GENERIC_INDEX, |
| .priv_class = &aptx_hd_demuxer_class, |
| }; |
| #endif |