[FFmpeg-cvslog] aptx: add raw muxer and demuxer for aptX
Aurelien Jacobs
git at videolan.org
Fri Nov 10 23:32:17 EET 2017
ffmpeg | branch: master | Aurelien Jacobs <aurel at gnuage.org> | Fri Nov 10 22:09:24 2017 +0100| [018eef1a1bb6f791201e9b9f38a317a2059c3af1] | committer: Rostislav Pehlivanov
aptx: add raw muxer and demuxer for aptX
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=018eef1a1bb6f791201e9b9f38a317a2059c3af1
---
doc/general.texi | 1 +
libavformat/Makefile | 2 ++
libavformat/allformats.c | 1 +
libavformat/aptxdec.c | 78 ++++++++++++++++++++++++++++++++++++++++++++++++
libavformat/rawenc.c | 13 ++++++++
libavformat/utils.c | 1 +
6 files changed, 96 insertions(+)
diff --git a/doc/general.texi b/doc/general.texi
index de4efee913..efd4a92495 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -441,6 +441,7 @@ library:
@item raw AC-3 @tab X @tab X
@item raw AMR-NB @tab @tab X
@item raw AMR-WB @tab @tab X
+ at item raw aptX @tab X @tab X
@item raw Chinese AVS video @tab X @tab X
@item raw CRI ADX @tab X @tab X
@item raw Dirac @tab X @tab X
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 146a4656f2..b1e7b193f4 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -94,6 +94,8 @@ OBJS-$(CONFIG_APC_DEMUXER) += apc.o
OBJS-$(CONFIG_APE_DEMUXER) += ape.o apetag.o img2.o
OBJS-$(CONFIG_APNG_DEMUXER) += apngdec.o
OBJS-$(CONFIG_APNG_MUXER) += apngenc.o
+OBJS-$(CONFIG_APTX_DEMUXER) += aptxdec.o rawdec.o
+OBJS-$(CONFIG_APTX_MUXER) += rawenc.o
OBJS-$(CONFIG_AQTITLE_DEMUXER) += aqtitledec.o subtitles.o
OBJS-$(CONFIG_ASF_DEMUXER) += asfdec_f.o asf.o asfcrypt.o \
avlanguage.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 1896d50e9e..9213af9301 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -69,6 +69,7 @@ static void register_all(void)
REGISTER_DEMUXER (APC, apc);
REGISTER_DEMUXER (APE, ape);
REGISTER_MUXDEMUX(APNG, apng);
+ REGISTER_MUXDEMUX(APTX, aptx);
REGISTER_DEMUXER (AQTITLE, aqtitle);
REGISTER_MUXDEMUX(ASF, asf);
REGISTER_DEMUXER (ASF_O, asf_o);
diff --git a/libavformat/aptxdec.c b/libavformat/aptxdec.c
new file mode 100644
index 0000000000..3b8fae1b55
--- /dev/null
+++ b/libavformat/aptxdec.c
@@ -0,0 +1,78 @@
+/*
+ * RAW aptX demuxer
+ *
+ * Copyright (C) 2017 Aurelien Jacobs <aurel at 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)
+
+typedef struct AptXDemuxerContext {
+ AVClass *class;
+ int sample_rate;
+} AptXDemuxerContext;
+
+static int aptx_read_header(AVFormatContext *s)
+{
+ AptXDemuxerContext *s1 = s->priv_data;
+ AVStream *st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+ st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codecpar->codec_id = AV_CODEC_ID_APTX;
+ st->codecpar->format = AV_SAMPLE_FMT_S32P;
+ st->codecpar->channels = 2;
+ st->codecpar->sample_rate = s1->sample_rate;
+ st->codecpar->bits_per_coded_sample = 4;
+ st->codecpar->block_align = APTX_BLOCK_SIZE;
+ st->codecpar->frame_size = APTX_PACKET_SIZE;
+ st->start_time = 0;
+ return 0;
+}
+
+static int aptx_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ return av_get_packet(s->pb, pkt, APTX_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 },
+};
+
+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,
+};
diff --git a/libavformat/rawenc.c b/libavformat/rawenc.c
index f640121cb4..aa3ef76fbf 100644
--- a/libavformat/rawenc.c
+++ b/libavformat/rawenc.c
@@ -91,6 +91,19 @@ AVOutputFormat ff_adx_muxer = {
};
#endif
+#if CONFIG_APTX_MUXER
+AVOutputFormat ff_aptx_muxer = {
+ .name = "aptx",
+ .long_name = NULL_IF_CONFIG_SMALL("raw aptX (Audio Processing Technology for Bluetooth)"),
+ .extensions = "aptx",
+ .audio_codec = AV_CODEC_ID_APTX,
+ .video_codec = AV_CODEC_ID_NONE,
+ .write_header = force_one_stream,
+ .write_packet = ff_raw_write_packet,
+ .flags = AVFMT_NOTIMESTAMPS,
+};
+#endif
+
#if CONFIG_CAVSVIDEO_MUXER
AVOutputFormat ff_cavsvideo_muxer = {
.name = "cavsvideo",
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 2b2411ffe7..d45a6b55a7 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -324,6 +324,7 @@ static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st,
} fmt_id_type[] = {
{ "aac", AV_CODEC_ID_AAC, AVMEDIA_TYPE_AUDIO },
{ "ac3", AV_CODEC_ID_AC3, AVMEDIA_TYPE_AUDIO },
+ { "aptx", AV_CODEC_ID_APTX, AVMEDIA_TYPE_AUDIO },
{ "dts", AV_CODEC_ID_DTS, AVMEDIA_TYPE_AUDIO },
{ "dvbsub", AV_CODEC_ID_DVB_SUBTITLE,AVMEDIA_TYPE_SUBTITLE },
{ "dvbtxt", AV_CODEC_ID_DVB_TELETEXT,AVMEDIA_TYPE_SUBTITLE },
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