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fluidsynth: add fluidsynth midi renderer

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Add a fluidsynth element that converts midi events into raw
float samples.
This commit is contained in:
Wim Taymans 2013-03-21 07:05:54 +01:00
parent 235f2a962e
commit 73824e0ea7
5 changed files with 575 additions and 0 deletions
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10
configure.ac
View file

@ -1341,6 +1341,14 @@ AG_GST_CHECK_FEATURE(GSM, [GSM library], gsmenc gsmdec, [
AC_SUBST(GSM_LIBS)
])
dnl *** fluidSynth ***
translit(dnm, m, l) AM_CONDITIONAL(USE_FLUIDSYNTH, true)
AG_GST_CHECK_FEATURE(FLUIDSYNTH, [fluidsynth], fluidsynth, [
PKG_CHECK_MODULES(FLUIDSYNTH, fluidsynth >= 1.0, HAVE_FLUIDSYNTH="yes", [
HAVE_FLUIDSYNTH="no"
])
])
dnl *** kate ***
translit(dnm, m, l) AM_CONDITIONAL(USE_KATE, true)
AG_GST_CHECK_FEATURE(KATE, [Kate], kate, [
@ -2158,6 +2166,7 @@ AM_CONDITIONAL(USE_FAAC, false)
AM_CONDITIONAL(USE_FAAD, false)
AM_CONDITIONAL(USE_FBDEV, false)
AM_CONDITIONAL(USE_FLITE, false)
AM_CONDITIONAL(USE_FLUIDSYNTH, false)
AM_CONDITIONAL(USE_GSM, false)
AM_CONDITIONAL(USE_HLS, false)
AM_CONDITIONAL(USE_KATE, false)
@ -2421,6 +2430,7 @@ ext/eglgles/Makefile
ext/faac/Makefile
ext/faad/Makefile
ext/flite/Makefile
ext/fluidsynth/Makefile
ext/gsm/Makefile
ext/hls/Makefile
ext/kate/Makefile

6
ext/Makefile.am
View file

@ -270,6 +270,10 @@ TIMIDITY_DIR=
endif
endif
if USE_FLUIDSYNTH
FLUIDSYNTH_DIR=fluidsynth
endif
if USE_SCHRO
SCHRO_DIR=schroedinger
else
@ -388,6 +392,7 @@ SUBDIRS=\
$(FAAC_DIR) \
$(FAAD_DIR) \
$(FLITE_DIR) \
$(FLUIDSYNTH_DIR) \
$(GSETTINGS_DIR) \
$(GSM_DIR) \
$(G729_DIR) \
@ -444,6 +449,7 @@ DIST_SUBDIRS = \
faac \
faad \
flite \
fluidsynth \
gsettings \
gsm \
hls \

20
ext/fluidsynth/Makefile.am Normal file
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@ -0,0 +1,20 @@
# plugindir is set in configure
plugin_LTLIBRARIES =
if USE_FLUIDSYNTH
plugin_LTLIBRARIES += libgstfluidsynth.la
# sources used to compile this plug-in
libgstfluidsynth_la_SOURCES = gstfluidsynth.c
# flags used to compile this plugin
# add other _CFLAGS and _LIBS as needed
libgstfluidsynth_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_CFLAGS) \
$(GST_BASE_CFLAGS) $(FLUIDSYNTH_CFLAGS)
libgstfluidsynth_la_LIBADD = $(GST_LIBS) $(GST_BASE_LIBS) $(FLUIDSYNTH_LIBS)
libgstfluidsynth_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
libgstfluidsynth_la_LIBTOOLFLAGS = --tag=disable-static
endif
noinst_HEADERS = gstfluidsynth.h

471
ext/fluidsynth/gstfluidsynth.c Normal file
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@ -0,0 +1,471 @@
/*
* gstfluidsynth - fluidsynth plugin for gstreamer
*
* Copyright 2013 Wim Taymans <wim.taymans@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-fluidsynth
* @see_also: timidity, wildmidi
*
* This element renders midi-events as audio streams using
* <ulink url="http://fluidsynth.sourceforge.net//">Fluidsynth</ulink>.
* It offers better sound quality compared to the timidity or wildmidi element.
*
* <refsect2>
* <title>Example pipeline</title>
* |[
* gst-launch-1.0 filesrc location=song.mid ! midiparse ! fluidsynth ! pulsesink
* ]| This example pipeline will parse the midi and render to raw audio which is
* played via pulseaudio.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#define FLUIDSYNTH_RATE 44100
#define FLUIDSYNTH_BPS (4 * 2)
#include <gst/gst.h>
#include <string.h>
#include <glib.h>
#include <glib/gstdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <gst/audio/audio.h>
#include "gstfluidsynth.h"
GST_DEBUG_CATEGORY_STATIC (gst_fluidsynth_debug);
#define GST_CAT_DEFAULT gst_fluidsynth_debug
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
PROP_0,
/* FILL ME */
};
static void gst_fluidsynth_finalize (GObject * object);
static gboolean gst_fluidsynth_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static GstStateChangeReturn gst_fluidsynth_change_state (GstElement * element,
GstStateChange transition);
static GstFlowReturn gst_fluidsynth_chain (GstPad * sinkpad, GstObject * parent,
GstBuffer * buffer);
static void gst_fluidsynth_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_fluidsynth_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-midi-event")
);
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw, "
"format = (string) " GST_AUDIO_NE (F32) ", "
"rate = (int) " G_STRINGIFY (FLUIDSYNTH_RATE) ", "
"channels = (int) 2, " "layout = (string) interleaved"));
#define parent_class gst_fluidsynth_parent_class
G_DEFINE_TYPE (GstFluidsynth, gst_fluidsynth, GST_TYPE_ELEMENT);
/* initialize the plugin's class */
static void
gst_fluidsynth_class_init (GstFluidsynthClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->finalize = gst_fluidsynth_finalize;
gobject_class->set_property = gst_fluidsynth_set_property;
gobject_class->get_property = gst_fluidsynth_get_property;
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&sink_factory));
gst_element_class_set_static_metadata (gstelement_class, "Fluidsynth",
"Codec/Decoder/Audio",
"Midi Synthesizer Element", "Wim Taymans <wim.taymans@gmail.com>");
gstelement_class->change_state = gst_fluidsynth_change_state;
}
/* initialize the new element
* instantiate pads and add them to element
* set functions
* initialize structure
*/
static void
gst_fluidsynth_init (GstFluidsynth * filter)
{
filter->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
gst_pad_set_event_function (filter->sinkpad, gst_fluidsynth_sink_event);
gst_pad_set_chain_function (filter->sinkpad, gst_fluidsynth_chain);
gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
filter->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
gst_pad_use_fixed_caps (filter->srcpad);
gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
}
static void
gst_fluidsynth_finalize (GObject * object)
{
G_OBJECT_CLASS (parent_class)->finalize (object);
}
#if 0
static GstBuffer *
gst_fluidsynth_clip_buffer (GstFluidsynth * fluidsynth, GstBuffer * buffer)
{
guint64 start, stop;
guint64 new_start, new_stop;
gint64 offset, length;
/* clipping disabled for now */
return buffer;
start = GST_BUFFER_OFFSET (buffer);
stop = GST_BUFFER_OFFSET_END (buffer);
if (!gst_segment_clip (&fluidsynth->segment, GST_FORMAT_DEFAULT,
start, stop, &new_start, &new_stop)) {
gst_buffer_unref (buffer);
return NULL;
}
if (start == new_start && stop == new_stop)
return buffer;
offset = new_start - start;
length = new_stop - new_start;
buffer = gst_buffer_make_writable (buffer);
gst_buffer_resize (buffer, offset, length);
GST_BUFFER_OFFSET (buffer) = new_start;
GST_BUFFER_OFFSET_END (buffer) = new_stop;
GST_BUFFER_TIMESTAMP (buffer) =
gst_util_uint64_scale_int (new_start, GST_SECOND, FLUIDSYNTH_RATE);
GST_BUFFER_DURATION (buffer) =
gst_util_uint64_scale_int (new_stop, GST_SECOND, FLUIDSYNTH_RATE) -
GST_BUFFER_TIMESTAMP (buffer);
return buffer;
}
#endif
static gboolean
gst_fluidsynth_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
gboolean res;
GstFluidsynth *fluidsynth = GST_FLUIDSYNTH (parent);
GST_DEBUG_OBJECT (pad, "%s event received", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
caps = gst_caps_new_simple ("audio/x-raw",
"format", G_TYPE_STRING, GST_AUDIO_NE (F32),
"rate", G_TYPE_INT, FLUIDSYNTH_RATE,
"channels", G_TYPE_INT, 2,
"layout", G_TYPE_STRING, "interleaved", NULL);
res = gst_pad_push_event (fluidsynth->srcpad, gst_event_new_caps (caps));
gst_caps_unref (caps);
break;
}
case GST_EVENT_SEGMENT:
gst_event_copy_segment (event, &fluidsynth->segment);
GST_DEBUG_OBJECT (fluidsynth, "configured segment %" GST_SEGMENT_FORMAT,
fluidsynth->segment);
res = gst_pad_event_default (pad, parent, event);
break;
case GST_EVENT_EOS:
/* FIXME, push last samples */
res = gst_pad_event_default (pad, parent, event);
break;
default:
res = gst_pad_event_default (pad, parent, event);
break;
}
return res;
}
static GstFlowReturn
produce_samples (GstFluidsynth * fluidsynth, GstClockTime pts)
{
GstClockTime out_duration;
guint samples;
GstMapInfo info;
GstBuffer *outbuf;
out_duration = pts - fluidsynth->last_pts;
samples =
gst_util_uint64_scale_int (out_duration, FLUIDSYNTH_RATE, GST_SECOND);
GST_DEBUG_OBJECT (fluidsynth,
"duration %" GST_TIME_FORMAT ", samples %u",
GST_TIME_ARGS (out_duration), samples);
outbuf = gst_buffer_new_allocate (NULL, samples * FLUIDSYNTH_BPS, NULL);
gst_buffer_map (outbuf, &info, GST_MAP_WRITE);
fluid_synth_write_float (fluidsynth->synth, samples, info.data, 0, 2,
info.data, 1, 2);
gst_buffer_unmap (outbuf, &info);
GST_BUFFER_DTS (outbuf) = fluidsynth->last_pts;
GST_BUFFER_PTS (outbuf) = fluidsynth->last_pts;
GST_BUFFER_DURATION (outbuf) = out_duration;
return gst_pad_push (fluidsynth->srcpad, outbuf);
}
static void
handle_buffer (GstFluidsynth * fluidsynth, GstBuffer * buffer)
{
GstMapInfo info;
guint8 event, channel;
gst_buffer_map (buffer, &info, GST_MAP_READ);
event = info.data[0];
channel = event & 0x0f;
switch (event & 0xf0) {
case 0xf0:
switch (event) {
case 0xff:
fluid_synth_system_reset (fluidsynth->synth);
break;
case 0xf0:
case 0xf7:
fluid_synth_sysex (fluidsynth->synth, (char *) info.data + 1,
info.size - 1, NULL, NULL, NULL, 0);
break;
default:
GST_WARNING_OBJECT (fluidsynth, "unhandled event 0x%02x", event);
break;
}
break;
default:
{
guint8 p1, p2;
p1 = info.size > 1 ? info.data[1] & 0x7f : 0;
p2 = info.size > 2 ? info.data[2] & 0x7f : 0;
switch (event & 0xf0) {
case 0x80:
fluid_synth_noteoff (fluidsynth->synth, channel, p1);
break;
case 0x90:
fluid_synth_noteon (fluidsynth->synth, channel, p1, p2);
break;
case 0xA0:
/* aftertouch */
break;
case 0xB0:
fluid_synth_cc (fluidsynth->synth, channel, p1, p2);
break;
case 0xC0:
fluid_synth_program_change (fluidsynth->synth, channel, p1);
break;
case 0xD0:
fluid_synth_channel_pressure (fluidsynth->synth, channel, p1);
break;
case 0xE0:
fluid_synth_pitch_bend (fluidsynth->synth, channel, (p2 << 7) | p1);
break;
default:
break;
}
break;
}
}
gst_buffer_unmap (buffer, &info);
}
static GstFlowReturn
gst_fluidsynth_chain (GstPad * sinkpad, GstObject * parent, GstBuffer * buffer)
{
GstFlowReturn res = GST_FLOW_OK;
GstFluidsynth *fluidsynth;
GstClockTime pts;
fluidsynth = GST_FLUIDSYNTH (parent);
pts = GST_BUFFER_PTS (buffer);
if (fluidsynth->last_pts == GST_CLOCK_TIME_NONE) {
fluidsynth->last_pts = pts;
} else if (pts != GST_CLOCK_TIME_NONE && fluidsynth->last_pts < pts) {
/* generate samples for the elapsed time */
res = produce_samples (fluidsynth, pts);
}
if (res == GST_FLOW_OK) {
handle_buffer (fluidsynth, buffer);
fluidsynth->last_pts = pts;
}
gst_buffer_unref (buffer);
return res;
}
static gboolean
gst_fluidsynth_open (GstFluidsynth * fluidsynth)
{
if (fluidsynth->settings == NULL) {
fluidsynth->settings = new_fluid_settings ();
fluidsynth->synth = new_fluid_synth (fluidsynth->settings);
/* FIXME configure path */
fluidsynth->soundfont = fluid_synth_sfload (fluidsynth->synth,
"/usr/share/sounds/sf2/FluidR3_GM.sf2", 1);
fluid_synth_set_chorus_on (fluidsynth->synth, TRUE);
fluid_synth_set_gain (fluidsynth->synth, 0.2);
fluid_synth_set_polyphony (fluidsynth->synth, 256);
fluid_synth_set_reverb_on (fluidsynth->synth, TRUE);
fluid_synth_set_sample_rate (fluidsynth->synth, FLUIDSYNTH_RATE);
}
return TRUE;
}
static gboolean
gst_fluidsynth_close (GstFluidsynth * fluidsynth)
{
if (fluidsynth->settings) {
fluid_synth_sfunload (fluidsynth->synth, fluidsynth->soundfont, 1);
delete_fluid_synth (fluidsynth->synth);
delete_fluid_settings (fluidsynth->settings);
fluidsynth->settings = NULL;
}
return TRUE;
}
static GstStateChangeReturn
gst_fluidsynth_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstFluidsynth *fluidsynth = GST_FLUIDSYNTH (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!gst_fluidsynth_open (fluidsynth))
goto open_failed;
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_NULL:
gst_fluidsynth_close (fluidsynth);
break;
default:
break;
}
return ret;
/* ERRORS */
open_failed:
{
GST_ERROR_OBJECT (fluidsynth, "could not open");
return GST_STATE_CHANGE_FAILURE;
}
}
static void
gst_fluidsynth_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_fluidsynth_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_fluidsynth_debug, "fluidsynth",
0, "Fluidsynth plugin");
return gst_element_register (plugin, "fluidsynth",
GST_RANK_SECONDARY, GST_TYPE_FLUIDSYNTH);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
fluidsynth,
"Fluidsynth Plugin",
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)

68
ext/fluidsynth/gstfluidsynth.h Normal file
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@ -0,0 +1,68 @@
/*
* gstfluidsynth - fluidsynth plugin for gstreamer
*
* Copyright 2007 Wouter Paesen <wouter@blue-gate.be>
* Copyright 2013 Wim Taymans <wim.taymans@gmail.be>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_FLUIDSYNTH_H__
#define __GST_FLUIDSYNTH_H__
#include <gst/gst.h>
#include <gst/base/gstadapter.h>
#include <fluidsynth.h>
G_BEGIN_DECLS
#define GST_TYPE_FLUIDSYNTH \
(gst_fluidsynth_get_type())
#define GST_FLUIDSYNTH(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_FLUIDSYNTH,GstFluidsynth))
#define GST_FLUIDSYNTH_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_FLUIDSYNTH,GstFluidsynthClass))
#define GST_IS_FLUIDSYNTH(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_FLUIDSYNTH))
#define GST_IS_FLUIDSYNTH_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_FLUIDSYNTH))
typedef struct _GstFluidsynth GstFluidsynth;
typedef struct _GstFluidsynthClass GstFluidsynthClass;
struct _GstFluidsynth
{
GstElement element;
GstPad *sinkpad, *srcpad;
GstSegment segment;
GstClockTime last_pts;
fluid_settings_t* settings;
fluid_synth_t* synth;
int soundfont;
};
struct _GstFluidsynthClass
{
GstElementClass parent_class;
};
GType gst_fluidsynth_get_type (void);
G_END_DECLS
#endif /* __GST_FLUIDSYNTH_H__ */