From: Daniel Stadelmann <code@ffmpeg.org>
To: ffmpeg-devel@ffmpeg.org
Subject: [FFmpeg-devel] [PATCH] avcodec/libmpeghdec: Add MPEG-H 3DA Fraunhofer IIS mpeghdec decoder (PR #20129)
Date: Wed, 6 Aug 2025 09:54:20 +0300 (EEST)
Message-ID: <20250806065420.E68D868BA68@ffbox0-bg.ffmpeg.org> (raw)
PR #20129 opened by Daniel Stadelmann (dstadelmann-iis)
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20129
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20129.patch
Adds a wrapper around the Fraunhofer IIS MPEG-H 3D Audio mpeghdec [1]
decoder shared library.
[1] https://github.com/Fraunhofer-IIS/mpeghdec
Signed-off-by: Stadelmann, Daniel <daniel.stadelmann@iis.fraunhofer.de>
From 137f4ac50efb868f0f7419c0842c5bf6913d27b9 Mon Sep 17 00:00:00 2001
From: "Stadelmann, Daniel" <daniel.stadelmann@iis.fraunhofer.de>
Date: Fri, 1 Aug 2025 07:15:37 +0200
Subject: [PATCH] avcodec/libmpeghdec: Add MPEG-H 3DA Fraunhofer IIS mpeghdec
decoder
Adds a wrapper around the Fraunhofer IIS MPEG-H 3D Audio mpeghdec [1]
decoder shared library.
[1] https://github.com/Fraunhofer-IIS/mpeghdec
Signed-off-by: Stadelmann, Daniel <daniel.stadelmann@iis.fraunhofer.de>
---
Changelog | 1 +
MAINTAINERS | 1 +
configure | 4 +
doc/decoders.texi | 21 +++
doc/general_contents.texi | 10 ++
libavcodec/Makefile | 1 +
libavcodec/allcodecs.c | 1 +
libavcodec/libmpeghdec.c | 306 ++++++++++++++++++++++++++++++++++++++
libavcodec/version.h | 4 +-
9 files changed, 347 insertions(+), 2 deletions(-)
create mode 100644 libavcodec/libmpeghdec.c
diff --git a/Changelog b/Changelog
index 04db8e15b2..42304c4098 100644
--- a/Changelog
+++ b/Changelog
@@ -26,6 +26,7 @@ version <next>:
- OpenHarmony hardware decoder/encoder
- Colordetect filter
- Add vf_scale_d3d11 filter
+- MPEG-H 3D Audio decoding via mpeghdec
version 7.1:
diff --git a/MAINTAINERS b/MAINTAINERS
index 650300dadc..ccf41b6099 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -208,6 +208,7 @@ Codecs:
libjxl*.c, libjxl.h Leo Izen
libgsm.c Michel Bardiaux
libkvazaar.c Arttu Ylä-Outinen
+ libmpeghdec.c Fraunhofer IIS (CC mpeg-h-techsupport@iis.fraunhofer.de) (B https://github.com/Fraunhofer-IIS/mpeghdec/issues)
libopenh264enc.c Martin Storsjo, Linjie Fu
libopenjpegenc.c Michael Bradshaw
libtheoraenc.c David Conrad
diff --git a/configure b/configure
index 00934b00be..1dbadd01b0 100755
--- a/configure
+++ b/configure
@@ -249,6 +249,7 @@ External library support:
--enable-liblensfun enable lensfun lens correction [no]
--enable-libmodplug enable ModPlug via libmodplug [no]
--enable-libmp3lame enable MP3 encoding via libmp3lame [no]
+ --enable-libmpeghdec enable MPEG-H 3DA decoding via libmpeghdec [no]
--enable-liboapv enable APV encoding via liboapv [no]
--enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
--enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
@@ -1952,6 +1953,7 @@ EXTERNAL_LIBRARY_LIST="
liblcevc_dec
libmodplug
libmp3lame
+ libmpeghdec
libmysofa
liboapv
libopencv
@@ -3611,6 +3613,7 @@ liblc3_encoder_select="audio_frame_queue"
libmodplug_demuxer_deps="libmodplug"
libmp3lame_encoder_deps="libmp3lame"
libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
+libmpeghdec_decoder_deps="libmpeghdec"
liboapv_encoder_deps="liboapv"
libopencore_amrnb_decoder_deps="libopencore_amrnb"
libopencore_amrnb_encoder_deps="libopencore_amrnb"
@@ -7085,6 +7088,7 @@ fi
enabled libmodplug && require_pkg_config libmodplug libmodplug libmodplug/modplug.h ModPlug_Load
enabled libmp3lame && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame $libm_extralibs
+enabled libmpeghdec && require_pkg_config libmpeghdec "mpeghdec >= 3.0.0" mpeghdec/mpeghdecoder.h mpeghdecoder_init
enabled libmysofa && { check_pkg_config libmysofa libmysofa mysofa.h mysofa_neighborhood_init_withstepdefine ||
require libmysofa mysofa.h mysofa_neighborhood_init_withstepdefine -lmysofa $zlib_extralibs; }
enabled libnpp && { check_lib libnpp npp.h nppGetLibVersion -lnppig -lnppicc -lnppc -lnppidei -lnppif ||
diff --git a/doc/decoders.texi b/doc/decoders.texi
index 13eb40f4dd..68088246ab 100644
--- a/doc/decoders.texi
+++ b/doc/decoders.texi
@@ -356,6 +356,27 @@ value is 0 (disabled).
@end table
+@section libmpeghdec
+
+libmpeghdec decoder wrapper.
+
+libmpeghdec allows libmpeghdec to decode the MPEG-H 3D audio codec.
+Requires the presence of the libmpeghdec headers and library during
+configuration. You need to explicitly configure the build with
+@code{--enable-libmpeghdec}.
+
+@subsection Options
+
+The following option is supported by the libmpeghdec wrapper.
+
+@table @option
+@item cicp @var{number} (1 - 19)
+
+Enables decoding into the given CICP (channel layout). The default
+value is 2 (Stereo).
+
+@end table
+
@section libopencore-amrnb
libopencore-amrnb decoder wrapper.
diff --git a/doc/general_contents.texi b/doc/general_contents.texi
index b9dab580f1..9608ce219a 100644
--- a/doc/general_contents.texi
+++ b/doc/general_contents.texi
@@ -250,6 +250,14 @@ Go to @url{http://sourceforge.net/projects/opencore-amr/} and follow the
instructions for installing the library.
Then pass @code{--enable-libfdk-aac} to configure to enable it.
+@subsection Fraunhofer MPEG-H 3D Audio decoder library
+
+FFmpeg can make use of the Fraunhofer MPEG-H decoder library for MPEG-H 3DA decoding.
+
+Go to @url{https://github.com/Fraunhofer-IIS/mpeghdec} and follow the
+instructions for installing the library.
+Then pass @code{--enable-libmpeghdec} to configure to enable it.
+
@subsection LC3 library
FFmpeg can make use of the Google LC3 library for LC3 decoding & encoding.
@@ -1344,6 +1352,8 @@ following image formats are supported:
@item MP3 (MPEG audio layer 3) @tab E @tab IX
@tab encoding supported through external library LAME, ADU MP3 and MP3onMP4 also supported
@item MPEG-4 Audio Lossless Coding (ALS) @tab @tab X
+@item MPEG-H 3D Audio @tab @tab E
+ @tab decoding supported through external library libmpeghdec
@item MobiClip FastAudio @tab @tab X
@item Musepack SV7 @tab @tab X
@item Musepack SV8 @tab @tab X
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index f935cfbe0d..a1705cdd7b 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -1160,6 +1160,7 @@ OBJS-$(CONFIG_LIBKVAZAAR_ENCODER) += libkvazaar.o
OBJS-$(CONFIG_LIBLC3_ENCODER) += liblc3enc.o
OBJS-$(CONFIG_LIBLC3_DECODER) += liblc3dec.o
OBJS-$(CONFIG_LIBMP3LAME_ENCODER) += libmp3lame.o
+OBJS-$(CONFIG_LIBMPEGHDEC_DECODER) += libmpeghdec.o
OBJS-$(CONFIG_LIBOAPV_ENCODER) += liboapvenc.o
OBJS-$(CONFIG_LIBOPENCORE_AMRNB_DECODER) += libopencore-amr.o
OBJS-$(CONFIG_LIBOPENCORE_AMRNB_ENCODER) += libopencore-amr.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 3aaa351157..22239b3521 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -789,6 +789,7 @@ extern const FFCodec ff_libjxl_encoder;
extern const FFCodec ff_liblc3_encoder;
extern const FFCodec ff_liblc3_decoder;
extern const FFCodec ff_libmp3lame_encoder;
+extern const FFCodec ff_libmpeghdec_decoder;
extern const FFCodec ff_liboapv_encoder;
extern const FFCodec ff_libopencore_amrnb_encoder;
extern const FFCodec ff_libopencore_amrnb_decoder;
diff --git a/libavcodec/libmpeghdec.c b/libavcodec/libmpeghdec.c
new file mode 100644
index 0000000000..b5d9e623ed
--- /dev/null
+++ b/libavcodec/libmpeghdec.c
@@ -0,0 +1,306 @@
+/*
+ * MPEG-H 3D Audio Decoder Wrapper
+ * Copyright (C) 2025 Fraunhofer Institute for Integrated Circuits IIS
+ *
+ * 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
+ */
+
+/*
+ * Please note that this FFmpeg Software is licensed under the LGPL-2.1
+ * but is combined with software that is licensed under different terms, namely
+ * the "Software License for The Fraunhofer FDK MPEG-H Software". Fraunhofer
+ * as the initial licensor does not interpret the LGPL-2.1 as requiring
+ * distribution of the MPEG-H Software under the LGPL-2.1 if being distributed
+ * together with this FFmpeg Software. Therefore, downstream distribution of
+ * FFmpegg Software does not imply any right to redistribute the MPEG-H Software
+ * under the LGPL-2.1.
+ */
+#include <string.h>
+#include <mpeghdec/mpeghdecoder.h>
+
+#include "libavutil/channel_layout.h"
+#include "libavutil/frame.h"
+#include "libavutil/mem.h"
+#include "libavutil/opt.h"
+
+#include "codec_internal.h"
+#include "decode.h"
+
+#define MAX_LOST_FRAMES 2
+// 32-bit int * 22.2 * max framesize * (max delay frames + 1)
+#define MAX_OUTBUF_SIZE (sizeof(int32_t) * 24 * 3072 * (MAX_LOST_FRAMES + 1))
+
+typedef struct MPEGH3DADecContext {
+ AVClass *av_class;
+ // pointer to the decoder
+ HANDLE_MPEGH_DECODER_CONTEXT decoder;
+
+ // Command-line options
+ int cicp;
+
+ // Internal values
+ int32_t *decoder_buffer;
+ int decoder_buffer_size;
+} MPEGH3DADecContext;
+
+static const AVOption mpegh3da_options[] = {
+ { "cicp",
+ "Target channel layout (CICP index)",
+ offsetof(MPEGH3DADecContext, cicp),
+ AV_OPT_TYPE_INT,
+ { .i64 = 2 },
+ 1,
+ 19,
+ AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM,
+ "cicp" },
+ { NULL }
+};
+
+// private class definition for ffmpeg
+static const AVClass mpegh3da_class = {
+ .class_name = "MPEG-H 3D Audio Decoder",
+ .item_name = av_default_item_name,
+ .option = mpegh3da_options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+static av_cold int mpegh3dadec_close(AVCodecContext *avctx)
+{
+ MPEGH3DADecContext *s = avctx->priv_data;
+
+ if (s->decoder)
+ mpeghdecoder_destroy(s->decoder);
+ s->decoder = NULL;
+ av_freep(&s->decoder_buffer);
+
+ return 0;
+}
+
+// lookup for ffmpeg channel layout for given cicp, see:
+// https://github.com/Fraunhofer-IIS/mpeghdec/wiki/MPEG-H-decoder-target-layouts
+static av_cold int set_channel_layout(AVChannelLayout *outLayout, int cicp)
+{
+ switch (cicp) {
+ case 0:
+ // default channel layout
+ return av_channel_layout_copy(
+ outLayout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_STEREO);
+ case 1:
+ return av_channel_layout_copy(
+ outLayout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_MONO);
+ case 2:
+ return av_channel_layout_copy(
+ outLayout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_STEREO);
+ case 3:
+ return av_channel_layout_copy(
+ outLayout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_SURROUND);
+ case 4:
+ return av_channel_layout_copy(
+ outLayout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_4POINT0);
+ case 5:
+ return av_channel_layout_copy(
+ outLayout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_5POINT0);
+ case 6:
+ return av_channel_layout_copy(
+ outLayout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_5POINT1);
+ case 7:
+ return av_channel_layout_copy(
+ outLayout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_7POINT1_WIDE);
+ case 9:
+ return av_channel_layout_copy(outLayout,
+ &(AVChannelLayout) AV_CHANNEL_LAYOUT_2_1);
+ case 10:
+ return av_channel_layout_copy(outLayout,
+ &(AVChannelLayout) AV_CHANNEL_LAYOUT_2_2);
+ case 11:
+ return av_channel_layout_copy(
+ outLayout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_6POINT1);
+ case 12:
+ return av_channel_layout_copy(
+ outLayout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_7POINT1);
+ case 13:
+ return av_channel_layout_copy(
+ outLayout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_22POINT2);
+ case 14:
+ return av_channel_layout_copy(
+ outLayout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_5POINT1POINT2);
+ case 15:
+ return av_channel_layout_copy(
+ outLayout,
+ &(AVChannelLayout) AV_CHANNEL_LAYOUT_MASK(
+ 12, (AV_CH_LAYOUT_5POINT1POINT2 | AV_CH_SIDE_SURROUND_LEFT |
+ AV_CH_SIDE_SURROUND_RIGHT | AV_CH_TOP_BACK_CENTER |
+ AV_CH_LOW_FREQUENCY_2)));
+ case 16:
+ return av_channel_layout_copy(
+ outLayout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_5POINT1POINT4_BACK);
+ case 17:
+ return av_channel_layout_copy(
+ outLayout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_MASK(
+ 12, (AV_CH_LAYOUT_5POINT1POINT4_BACK |
+ AV_CH_TOP_FRONT_CENTER | AV_CH_TOP_CENTER)));
+ case 18:
+ return av_channel_layout_copy(
+ outLayout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_MASK(
+ 14, (AV_CH_LAYOUT_7POINT1POINT4_BACK |
+ AV_CH_TOP_FRONT_CENTER | AV_CH_TOP_CENTER)));
+ case 19:
+ return av_channel_layout_copy(
+ outLayout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_7POINT1POINT4_BACK);
+ }
+ return AVERROR(EINVAL);
+}
+
+static av_cold int mpegh3dadec_init(AVCodecContext *avctx)
+{
+ MPEGH3DADecContext *s = avctx->priv_data;
+
+ if (!s->cicp) {
+ av_log(avctx, AV_LOG_ERROR,
+ "Target layout CICP needs to be specified\n");
+ return AVERROR(EINVAL);
+ }
+
+ s->decoder = NULL;
+
+ avctx->delay = 0;
+ avctx->sample_fmt = AV_SAMPLE_FMT_S32;
+ avctx->sample_rate = 48000;
+ if (set_channel_layout(&avctx->ch_layout, s->cicp) ||
+ avctx->ch_layout.nb_channels == 0) {
+ av_log(avctx, AV_LOG_ERROR, "Unsupported CICP index: %u.\n", s->cicp);
+ mpegh3dadec_close(avctx);
+ return AVERROR(EINVAL);
+ }
+
+ s->decoder_buffer_size = MAX_OUTBUF_SIZE;
+ s->decoder_buffer = av_malloc(s->decoder_buffer_size);
+ if (!s->decoder_buffer) {
+ mpegh3dadec_close(avctx);
+ return AVERROR(ENOMEM);
+ }
+
+ // initialize the decoder
+ s->decoder = mpeghdecoder_init(s->cicp);
+ if (s->decoder == NULL) {
+ av_log(avctx, AV_LOG_ERROR, "MPEG-H decoder library init failed.\n");
+ mpegh3dadec_close(avctx);
+ return AVERROR_EXTERNAL;
+ }
+
+ if (avctx->extradata_size) {
+ if (mpeghdecoder_setMhaConfig(s->decoder, avctx->extradata,
+ avctx->extradata_size)) {
+ av_log(avctx, AV_LOG_ERROR, "Unable to set MHA configuration\n");
+ mpegh3dadec_close(avctx);
+ return AVERROR_INVALIDDATA;
+ }
+ }
+
+ return 0;
+}
+
+static int mpegh3dadec_decode_frame(AVCodecContext *avctx, AVFrame *frame,
+ int *got_frame_ptr, AVPacket *avpkt)
+{
+ MPEGH3DADecContext *s = avctx->priv_data;
+ int ret;
+ MPEGH_DECODER_ERROR err;
+ MPEGH_DECODER_OUTPUT_INFO out_info;
+
+ if (!avctx->sample_rate) {
+ av_log(avctx, AV_LOG_ERROR, "Audio sample rate is not set");
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (avpkt->data != NULL && avpkt->size > 0) {
+ if ((err = mpeghdecoder_processTimescale(s->decoder, avpkt->data,
+ avpkt->size, avpkt->pts,
+ avctx->sample_rate))) {
+ av_log(avctx, AV_LOG_ERROR, "mpeghdecoder_process() failed: %x\n",
+ err);
+ return AVERROR_INVALIDDATA;
+ }
+ } else {
+ // we are flushing
+ err = mpeghdecoder_flushAndGet(s->decoder);
+
+ if (err != MPEGH_DEC_OK && err != MPEGH_DEC_FEED_DATA)
+ av_log(avctx, AV_LOG_WARNING,
+ "mpeghdecoder_flushAndGet() failed: %d\n", err);
+ }
+
+ err = mpeghdecoder_getSamples(s->decoder, s->decoder_buffer,
+ s->decoder_buffer_size / sizeof(int32_t),
+ &out_info);
+ if (err == MPEGH_DEC_FEED_DATA) {
+ // no frames to produce at the moment
+ return avpkt->size;
+ } else if (err) {
+ av_log(avctx, AV_LOG_ERROR, "mpeghdecoder_getSamples() failed: %x\n",
+ err);
+ return AVERROR_UNKNOWN;
+ }
+
+ frame->nb_samples = avctx->frame_size = out_info.numSamplesPerChannel;
+ frame->sample_rate = avctx->sample_rate = out_info.sampleRate;
+ frame->pts = out_info.ticks;
+ frame->time_base.num = 1;
+ frame->time_base.den = out_info.sampleRate;
+
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
+ return ret;
+
+ memcpy(frame->extended_data[0], s->decoder_buffer,
+ avctx->ch_layout.nb_channels * avctx->frame_size *
+ av_get_bytes_per_sample(avctx->sample_fmt));
+
+ *got_frame_ptr = 1;
+ return ret = avpkt->size;
+}
+
+static av_cold void mpegh3dadec_flush(AVCodecContext *avctx)
+{
+ MPEGH_DECODER_ERROR err;
+ MPEGH3DADecContext *s = avctx->priv_data;
+
+ if (!s->decoder)
+ return;
+
+ err = mpeghdecoder_flush(s->decoder);
+
+ if (err != MPEGH_DEC_OK && err != MPEGH_DEC_FEED_DATA)
+ av_log(avctx, AV_LOG_WARNING, "mpeghdecoder_flush failed: %d\n", err);
+}
+
+const FFCodec ff_libmpeghdec_decoder = {
+ .p.name = "libmpeghdec",
+ CODEC_LONG_NAME("libmpeghdec (MPEG-H 3D Audio)"),
+ .p.priv_class = &mpegh3da_class,
+ .p.type = AVMEDIA_TYPE_AUDIO,
+ .p.id = AV_CODEC_ID_MPEGH_3D_AUDIO,
+ .p.capabilities =
+ AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_CHANNEL_CONF,
+ .priv_data_size = sizeof(MPEGH3DADecContext),
+ .init = mpegh3dadec_init,
+ FF_CODEC_DECODE_CB(mpegh3dadec_decode_frame),
+ .close = mpegh3dadec_close,
+ .flush = mpegh3dadec_flush,
+ CODEC_SAMPLEFMTS(AV_SAMPLE_FMT_S32),
+ .caps_internal = 0,
+ .p.wrapper_name = "libmpeghdec",
+};
diff --git a/libavcodec/version.h b/libavcodec/version.h
index fb4cb6c86b..230d5fa13e 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -29,8 +29,8 @@
#include "version_major.h"
-#define LIBAVCODEC_VERSION_MINOR 8
-#define LIBAVCODEC_VERSION_MICRO 101
+#define LIBAVCODEC_VERSION_MINOR 9
+#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \
--
2.49.1
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