[FFmpeg-devel] [PATCH] lavf: add libopenmpt demuxer
Josh de Kock
josh at itanimul.li
Sun Jun 19 01:40:57 CEST 2016
Fixes ticket #5623
TODO: bump lavf minor
Hi,
This should address all prior concerns. The issue with channel layouts
was resolved because of various issues with surround output it was
decided to just use stereo and let the user override mono/surround if
needed.
Josh
---
Changelog | 1 +
configure | 4 ++
libavformat/Makefile | 1 +
libavformat/allformats.c | 1 +
libavformat/libopenmpt.c | 182 +++++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 189 insertions(+)
create mode 100644 libavformat/libopenmpt.c
diff --git a/Changelog b/Changelog
index 49bb557..5956a62 100644
--- a/Changelog
+++ b/Changelog
@@ -42,6 +42,7 @@ version <next>:
- OpenExr improvements (tile data and B44/B44A support)
- BitJazz SheerVideo decoder
- CUDA CUVID H264/HEVC decoder
+- libopenmpt demuxer
version 3.0:
diff --git a/configure b/configure
index a220fa1..6fea69b 100755
--- a/configure
+++ b/configure
@@ -249,6 +249,7 @@ External library support:
--enable-libopencv enable video filtering via libopencv [no]
--enable-libopenh264 enable H.264 encoding via OpenH264 [no]
--enable-libopenjpeg enable JPEG 2000 de/encoding via OpenJPEG [no]
+ --enable-libopenmpt enable decoding tracked files via libopenmpt [no]
--enable-libopus enable Opus de/encoding via libopus [no]
--enable-libpulse enable Pulseaudio input via libpulse [no]
--enable-librubberband enable rubberband needed for rubberband filter [no]
@@ -1496,6 +1497,7 @@ EXTERNAL_LIBRARY_LIST="
libopencv
libopenh264
libopenjpeg
+ libopenmpt
libopus
libpulse
librtmp
@@ -2760,6 +2762,7 @@ libopencore_amrwb_decoder_deps="libopencore_amrwb"
libopenh264_encoder_deps="libopenh264"
libopenjpeg_decoder_deps="libopenjpeg"
libopenjpeg_encoder_deps="libopenjpeg"
+libopenmpt_demuxer_deps="libopenmpt"
libopus_decoder_deps="libopus"
libopus_encoder_deps="libopus"
libopus_encoder_select="audio_frame_queue"
@@ -5667,6 +5670,7 @@ enabled libopenjpeg && { check_lib openjpeg-2.1/openjpeg.h opj_version -lo
check_lib openjpeg-1.5/openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
check_lib openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
die "ERROR: libopenjpeg not found"; }
+enabled libopenmpt && require_pkg_config libopenmpt libopenmpt/libopenmpt.h openmpt_module_create
enabled libopus && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
enabled libpulse && require_pkg_config libpulse pulse/pulseaudio.h pa_context_new
enabled librtmp && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 813872b..c9b0d14 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -522,6 +522,7 @@ OBJS-$(CONFIG_LIBGME_DEMUXER) += libgme.o
OBJS-$(CONFIG_LIBMODPLUG_DEMUXER) += libmodplug.o
OBJS-$(CONFIG_LIBNUT_DEMUXER) += libnut.o
OBJS-$(CONFIG_LIBNUT_MUXER) += libnut.o
+OBJS-$(CONFIG_LIBOPENMPT_DEMUXER) += libopenmpt.o
OBJS-$(CONFIG_LIBRTMP) += librtmp.o
OBJS-$(CONFIG_LIBSSH_PROTOCOL) += libssh.o
OBJS-$(CONFIG_LIBSMBCLIENT_PROTOCOL) += libsmbclient.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index ddf540c..de445b0 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -370,6 +370,7 @@ void av_register_all(void)
REGISTER_DEMUXER (LIBGME, libgme);
REGISTER_DEMUXER (LIBMODPLUG, libmodplug);
REGISTER_MUXDEMUX(LIBNUT, libnut);
+ REGISTER_DEMUXER (LIBOPENMPT, libopenmpt);
initialized = 1;
}
diff --git a/libavformat/libopenmpt.c b/libavformat/libopenmpt.c
new file mode 100644
index 0000000..b2dcb9b
--- /dev/null
+++ b/libavformat/libopenmpt.c
@@ -0,0 +1,182 @@
+/*
+ * Tracked MOD demuxer (libopenmpt)
+ * Copyright (c) 2016 Josh de Kock
+ *
+ * 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 <libopenmpt/libopenmpt.h>
+#include <libopenmpt/libopenmpt_stream_callbacks_file.h>
+
+#include "libavutil/avstring.h"
+#include "libavutil/opt.h"
+#include "avformat.h"
+#include "internal.h"
+
+typedef struct OpenMPTContext {
+ const AVClass *class;
+ openmpt_module *module;
+
+ int channels;
+ double duration;
+ /* options */
+ int sample_rate;
+ int64_t layout;
+} OpenMPTContext;
+
+#define OFFSET(x) offsetof(OpenMPTContext, x)
+#define A AV_OPT_FLAG_AUDIO_PARAM
+#define D AV_OPT_FLAG_DECODING_PARAM
+static const AVOption options[] = {
+ {"sample_rate", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 44100}, 1000, INT_MAX, A|D},
+ {"layout", "set channel layout (default: stereo)", OFFSET(layout), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64 = AV_CH_LAYOUT_STEREO}, 0, INT64_MAX, A|D},
+ {NULL}
+};
+
+static void openmpt_logfunc(const char *message, void *userdata)
+{
+ int level = AV_LOG_INFO;
+ if (strstr(message, "ERROR") != NULL) {
+ level = AV_LOG_ERROR;
+ }
+ av_log(userdata, level, "%s\n", message);
+}
+
+static int probe_openmpt(AVProbeData *p)
+{
+ FILE *file = fopen(p->filename, "rb");
+ double ret = openmpt_could_open_propability(openmpt_stream_get_file_callbacks(), file, 1.0, openmpt_logfunc, NULL);
+ fclose(file);
+ return ret ? ret * AVPROBE_SCORE_MAX : 0;
+}
+
+#define add_meta(s, name, meta) \
+do { \
+ const char *value = meta; \
+ if (value && value[0]) \
+ av_dict_set(&s->metadata, name, value, 0); \
+} while(0)
+
+static int read_header_openmpt(AVFormatContext *s)
+{
+ AVStream *st;
+ OpenMPTContext *openmpt = s->priv_data;
+ int64_t size = avio_size(s->pb);
+ char *buf = av_malloc(size);
+
+ if (!buf)
+ return AVERROR(ENOMEM);
+ size = avio_read(s->pb, buf, size);
+
+ openmpt->module = openmpt_module_create_from_memory(buf, size, openmpt_logfunc, s, NULL);
+ av_freep(&buf);
+ if (!openmpt->module)
+ return AVERROR(ENOMEM);
+
+ openmpt->channels = av_get_channel_layout_nb_channels(openmpt->layout);
+ openmpt->duration = openmpt_module_get_duration_seconds(openmpt->module);
+
+ add_meta(s, "artist", openmpt_module_get_metadata(openmpt->module, "artist"));
+ add_meta(s, "title", openmpt_module_get_metadata(openmpt->module, "title"));
+ add_meta(s, "encoder", openmpt_module_get_metadata(openmpt->module, "tracker"));
+ add_meta(s, "comment", openmpt_module_get_metadata(openmpt->module, "message"));
+
+ st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+ avpriv_set_pts_info(st, 64, 1, 1000);
+ if (st->duration > 0)
+ st->duration = (int64_t)(openmpt->duration*AV_TIME_BASE+0.5);
+
+ st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codecpar->codec_id = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE);
+ st->codecpar->channels = openmpt->channels;
+ st->codecpar->sample_rate = openmpt->sample_rate;
+
+ return 0;
+}
+
+#define AUDIO_PKT_SIZE 2048
+
+static int read_packet_openmpt(AVFormatContext *s, AVPacket *pkt)
+{
+ OpenMPTContext *openmpt = s->priv_data;
+ int n_samples = AUDIO_PKT_SIZE / (openmpt->channels ? openmpt->channels*2 : 2);
+ int ret;
+
+ if ((ret = av_new_packet(pkt, AUDIO_PKT_SIZE)) < 0)
+ return ret;
+
+ switch (openmpt->channels) {
+ case 1:
+ ret = openmpt_module_read_mono(openmpt->module, openmpt->sample_rate,
+ n_samples, (short *)pkt->data);
+ break;
+ case 2:
+ ret = openmpt_module_read_interleaved_stereo(openmpt->module, openmpt->sample_rate,
+ n_samples, (short *)pkt->data);
+ break;
+ case 4:
+ ret = openmpt_module_read_interleaved_quad(openmpt->module, openmpt->sample_rate,
+ n_samples, (short *)pkt->data);
+ break;
+ default:
+ av_log(s, AV_LOG_ERROR, "Unsupported number of channels: %d", openmpt->channels);
+ return AVERROR(EINVAL);
+ }
+
+ if (ret < 1 || (openmpt->duration < openmpt_module_get_position_seconds(openmpt->module)))
+ return AVERROR_EOF;
+
+ pkt->size = AUDIO_PKT_SIZE;
+
+ return 0;
+}
+
+static int read_close_openmpt(AVFormatContext *s)
+{
+ OpenMPTContext *openmpt = s->priv_data;
+ openmpt_module_destroy(openmpt->module);
+ return 0;
+}
+
+static int read_seek_openmpt(AVFormatContext *s, int stream_idx, int64_t ts, int flags)
+{
+ OpenMPTContext *openmpt = s->priv_data;
+ openmpt_module_set_position_seconds(openmpt->module, (double)ts/AV_TIME_BASE);
+ return 0;
+}
+
+static const AVClass class_openmpt = {
+ .class_name = "libopenmpt",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+AVInputFormat ff_libopenmpt_demuxer = {
+ .name = "libopenmpt",
+ .long_name = NULL_IF_CONFIG_SMALL("Tracker formats (libopenmpt)"),
+ .priv_data_size = sizeof(OpenMPTContext),
+ .read_probe = probe_openmpt,
+ .read_header = read_header_openmpt,
+ .read_packet = read_packet_openmpt,
+ .read_close = read_close_openmpt,
+ .read_seek = read_seek_openmpt,
+ .priv_class = &class_openmpt,
+ .extensions = "mod",
+};
--
2.6.4 (Apple Git-63)
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