[FFmpeg-devel] [PATCH 3/3] sbc: add raw muxer and demuxer for SBC
Aurelien Jacobs
aurel at gnuage.org
Mon Nov 6 01:35:20 EET 2017
---
doc/general.texi | 1 +
libavformat/Makefile | 4 +++
libavformat/allformats.c | 2 ++
libavformat/rawenc.c | 28 ++++++++++++++++++
libavformat/sbcdec.c | 76 ++++++++++++++++++++++++++++++++++++++++++++++++
libavformat/utils.c | 1 +
6 files changed, 112 insertions(+)
create mode 100644 libavformat/sbcdec.c
diff --git a/doc/general.texi b/doc/general.texi
index baaa308dcf..74f72be69a 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -462,6 +462,7 @@ library:
@item raw NULL @tab X @tab
@item raw video @tab X @tab X
@item raw id RoQ @tab X @tab
+ at item raw SBC @tab X @tab X
@item raw Shorten @tab @tab X
@item raw TAK @tab @tab X
@item raw TrueHD @tab X @tab X
diff --git a/libavformat/Makefile b/libavformat/Makefile
index caebe5b146..0dff981c01 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -442,6 +442,10 @@ OBJS-$(CONFIG_S337M_DEMUXER) += s337m.o spdif.o
OBJS-$(CONFIG_SAMI_DEMUXER) += samidec.o subtitles.o
OBJS-$(CONFIG_SAP_DEMUXER) += sapdec.o
OBJS-$(CONFIG_SAP_MUXER) += sapenc.o
+OBJS-$(CONFIG_SBC_DEMUXER) += sbcdec.o rawdec.o
+OBJS-$(CONFIG_SBC_MUXER) += rawenc.o
+OBJS-$(CONFIG_MSBC_DEMUXER) += sbcdec.o rawdec.o
+OBJS-$(CONFIG_MSBC_MUXER) += rawenc.o
OBJS-$(CONFIG_SBG_DEMUXER) += sbgdec.o
OBJS-$(CONFIG_SCC_DEMUXER) += sccdec.o subtitles.o
OBJS-$(CONFIG_SCC_MUXER) += sccenc.o subtitles.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 405ddb5ad9..a7109d5abb 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -208,6 +208,7 @@ static void register_all(void)
REGISTER_MUXDEMUX(MPJPEG, mpjpeg);
REGISTER_DEMUXER (MPL2, mpl2);
REGISTER_DEMUXER (MPSUB, mpsub);
+ REGISTER_MUXDEMUX(MSBC, msbc);
REGISTER_DEMUXER (MSF, msf);
REGISTER_DEMUXER (MSNWC_TCP, msnwc_tcp);
REGISTER_DEMUXER (MTAF, mtaf);
@@ -273,6 +274,7 @@ static void register_all(void)
REGISTER_DEMUXER (S337M, s337m);
REGISTER_DEMUXER (SAMI, sami);
REGISTER_MUXDEMUX(SAP, sap);
+ REGISTER_MUXDEMUX(SBC, sbc);
REGISTER_DEMUXER (SBG, sbg);
REGISTER_MUXDEMUX(SCC, scc);
REGISTER_DEMUXER (SDP, sdp);
diff --git a/libavformat/rawenc.c b/libavformat/rawenc.c
index f640121cb4..ac0119489c 100644
--- a/libavformat/rawenc.c
+++ b/libavformat/rawenc.c
@@ -413,6 +413,34 @@ AVOutputFormat ff_rawvideo_muxer = {
};
#endif
+#if CONFIG_SBC_MUXER
+AVOutputFormat ff_sbc_muxer = {
+ .name = "sbc",
+ .long_name = NULL_IF_CONFIG_SMALL("raw SBC"),
+ .mime_type = "audio/x-sbc",
+ .extensions = "sbc",
+ .audio_codec = AV_CODEC_ID_SBC,
+ .video_codec = AV_CODEC_ID_NONE,
+ .write_header = force_one_stream,
+ .write_packet = ff_raw_write_packet,
+ .flags = AVFMT_NOTIMESTAMPS,
+};
+#endif
+
+#if CONFIG_MSBC_MUXER
+AVOutputFormat ff_msbc_muxer = {
+ .name = "msbc",
+ .long_name = NULL_IF_CONFIG_SMALL("raw mSBC"),
+ .mime_type = "audio/x-msbc",
+ .extensions = "msbc",
+ .audio_codec = AV_CODEC_ID_MSBC,
+ .video_codec = AV_CODEC_ID_NONE,
+ .write_header = force_one_stream,
+ .write_packet = ff_raw_write_packet,
+ .flags = AVFMT_NOTIMESTAMPS,
+};
+#endif
+
#if CONFIG_TRUEHD_MUXER
AVOutputFormat ff_truehd_muxer = {
.name = "truehd",
diff --git a/libavformat/sbcdec.c b/libavformat/sbcdec.c
new file mode 100644
index 0000000000..1eb99bae03
--- /dev/null
+++ b/libavformat/sbcdec.c
@@ -0,0 +1,76 @@
+/*
+ * RAW SBC 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 SBC_SYNCWORD 0x9C
+#define MSBC_SYNCWORD 0xAD
+
+#if CONFIG_SBC_DEMUXER
+static int sbc_probe(AVProbeData *p)
+{
+ int score = 0;
+ int l = strlen(p->filename);
+ if (l > 4 && !strcmp(&p->filename[l-4], ".sbc"))
+ score = AVPROBE_SCORE_EXTENSION;
+ if (p->buf[0] == SBC_SYNCWORD)
+ score++;
+ return score;
+}
+
+AVInputFormat ff_sbc_demuxer = {
+ .name = "sbc",
+ .long_name = NULL_IF_CONFIG_SMALL("raw SBC (low-complexity subband codec)"),
+ .extensions = "sbc",
+ .raw_codec_id = AV_CODEC_ID_SBC,
+ .read_probe = sbc_probe,
+ .read_header = ff_raw_audio_read_header,
+ .read_packet = ff_raw_read_partial_packet,
+ .flags = AVFMT_GENERIC_INDEX,
+};
+#endif
+
+#if CONFIG_MSBC_DEMUXER
+static int msbc_probe(AVProbeData *p)
+{
+ int score = 0;
+ int l = strlen(p->filename);
+ if (l > 5 && !strcmp(&p->filename[l-5], ".msbc"))
+ score = AVPROBE_SCORE_EXTENSION;
+ else if (l > 4 && !strcmp(&p->filename[l-4], ".sbc"))
+ score = AVPROBE_SCORE_EXTENSION;
+ if (p->buf[0] == MSBC_SYNCWORD)
+ score++;
+ return score;
+}
+
+AVInputFormat ff_msbc_demuxer = {
+ .name = "msbc",
+ .long_name = NULL_IF_CONFIG_SMALL("raw mSBC (wideband speech mono SBC)"),
+ .extensions = "msbc",
+ .raw_codec_id = AV_CODEC_ID_MSBC,
+ .read_probe = msbc_probe,
+ .read_header = ff_raw_audio_read_header,
+ .read_packet = ff_raw_read_partial_packet,
+ .flags = AVFMT_GENERIC_INDEX,
+};
+#endif
diff --git a/libavformat/utils.c b/libavformat/utils.c
index cbfb78bf4d..dedabee642 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -335,6 +335,7 @@ static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st,
{ "mjpeg_2000",AV_CODEC_ID_JPEG2000, AVMEDIA_TYPE_VIDEO },
{ "mp3", AV_CODEC_ID_MP3, AVMEDIA_TYPE_AUDIO },
{ "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
+ { "sbc", AV_CODEC_ID_SBC, AVMEDIA_TYPE_AUDIO },
{ "truehd", AV_CODEC_ID_TRUEHD, AVMEDIA_TYPE_AUDIO },
{ 0 }
};
--
2.15.0
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