4 * Copyright (C) 2017 Aurelien Jacobs <aurel@gnuage.org>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 #define APTX_BLOCK_SIZE 4
27 #define APTX_PACKET_SIZE (256*APTX_BLOCK_SIZE)
29 typedef struct AptXDemuxerContext {
34 static int aptx_read_header(AVFormatContext *s)
36 AptXDemuxerContext *s1 = s->priv_data;
37 AVStream *st = avformat_new_stream(s, NULL);
39 return AVERROR(ENOMEM);
40 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
41 st->codecpar->codec_id = AV_CODEC_ID_APTX;
42 st->codecpar->format = AV_SAMPLE_FMT_S32P;
43 st->codecpar->channels = 2;
44 st->codecpar->sample_rate = s1->sample_rate;
45 st->codecpar->bits_per_coded_sample = 4;
46 st->codecpar->block_align = APTX_BLOCK_SIZE;
47 st->codecpar->frame_size = APTX_PACKET_SIZE;
52 static int aptx_read_packet(AVFormatContext *s, AVPacket *pkt)
54 return av_get_packet(s->pb, pkt, APTX_PACKET_SIZE);
57 static const AVOption aptx_options[] = {
58 { "sample_rate", "", offsetof(AptXDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 48000}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
62 static const AVClass aptx_demuxer_class = {
63 .class_name = "aptx demuxer",
64 .item_name = av_default_item_name,
65 .option = aptx_options,
66 .version = LIBAVUTIL_VERSION_INT,
69 AVInputFormat ff_aptx_demuxer = {
71 .long_name = NULL_IF_CONFIG_SMALL("raw aptX"),
73 .priv_data_size = sizeof(AptXDemuxerContext),
74 .read_header = aptx_read_header,
75 .read_packet = aptx_read_packet,
76 .flags = AVFMT_GENERIC_INDEX,
77 .priv_class = &aptx_demuxer_class,