/* * 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