gstreamer/ext/lv2/gstlv2.c
2009-06-26 00:09:36 +03:00

588 lines
17 KiB
C

/* GStreamer
* Copyright (C) 1999 Erik Walthinsen <omega@cse.ogi.edu>
* 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
* 2003 Andy Wingo <wingo at pobox.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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <math.h>
#include <gst/audio/audio.h>
#include <gst/controller/gstcontroller.h>
#include "gstlv2.h"
#include <slv2/slv2.h>
#define GST_SLV2_PLUGIN_QDATA g_quark_from_static_string("slv2-plugin")
static void gst_lv2_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_lv2_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static gboolean gst_lv2_setup (GstSignalProcessor * sigproc, guint sample_rate);
static gboolean gst_lv2_start (GstSignalProcessor * sigproc);
static void gst_lv2_stop (GstSignalProcessor * sigproc);
static void gst_lv2_cleanup (GstSignalProcessor * sigproc);
static void gst_lv2_process (GstSignalProcessor * sigproc, guint nframes);
static SLV2World world;
SLV2Value audio_class;
SLV2Value control_class;
SLV2Value input_class;
SLV2Value output_class;
SLV2Value integer_prop;
SLV2Value toggled_prop;
static GstSignalProcessorClass *parent_class;
static GstPlugin *gst_lv2_plugin;
GST_DEBUG_CATEGORY_STATIC (lv2_debug);
#define GST_CAT_DEFAULT lv2_debug
static void
gst_lv2_base_init (gpointer g_class)
{
GstLV2Class *klass = (GstLV2Class *) g_class;
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
GstSignalProcessorClass *gsp_class = GST_SIGNAL_PROCESSOR_CLASS (g_class);
GstElementDetails *details;
SLV2Plugin lv2plugin;
SLV2Value val;
guint j, audio_in_count, audio_out_count, control_in_count, control_out_count;
gchar *klass_tags;
GST_DEBUG ("base_init %p", g_class);
lv2plugin = (SLV2Plugin) g_type_get_qdata (G_OBJECT_CLASS_TYPE (klass),
GST_SLV2_PLUGIN_QDATA);
g_assert (lv2plugin);
/* pad templates */
gsp_class->num_audio_in = 0;
gsp_class->num_audio_out = 0;
/* properties */
gsp_class->num_control_in = 0;
gsp_class->num_control_out = 0;
for (j = 0; j < slv2_plugin_get_num_ports (lv2plugin); j++) {
SLV2Port port = slv2_plugin_get_port_by_index (lv2plugin, j);
if (slv2_port_is_a (lv2plugin, port, audio_class)) {
gchar *name =
g_strdup (slv2_value_as_string (slv2_port_get_symbol (lv2plugin,
port)));
GST_DEBUG ("LV2 port name: \"%s\"", name);
if (slv2_port_is_a (lv2plugin, port, input_class))
gst_signal_processor_class_add_pad_template (gsp_class, name,
GST_PAD_SINK, gsp_class->num_audio_in++);
else if (slv2_port_is_a (lv2plugin, port, output_class))
gst_signal_processor_class_add_pad_template (gsp_class, name,
GST_PAD_SRC, gsp_class->num_audio_out++);
/* TODO: else ignore plugin */
g_free (name);
} else if (slv2_port_is_a (lv2plugin, port, control_class)) {
if (slv2_port_is_a (lv2plugin, port, input_class))
gsp_class->num_control_in++;
else if (slv2_port_is_a (lv2plugin, port, output_class))
gsp_class->num_control_out++;
/* TODO: else ignore plugin */
}
/* TODO: else ignore plugin */
}
/* construct the element details struct */
details = g_new0 (GstElementDetails, 1);
val = slv2_plugin_get_name (lv2plugin);
if (val) {
details->longname = g_strdup (slv2_value_as_string (val));
slv2_value_free (val);
} else {
details->longname = g_strdup ("no description available");
}
details->description = details->longname;
val = slv2_plugin_get_author_name (lv2plugin);
if (val) {
details->author = g_strdup (slv2_value_as_string (val));
slv2_value_free (val);
} else {
details->author = g_strdup ("no author available");
}
if (gsp_class->num_audio_in == 0)
klass_tags = "Source/Audio/LV2";
else if (gsp_class->num_audio_out == 0) {
if (gsp_class->num_control_out == 0)
klass_tags = "Sink/Audio/LV2";
else
klass_tags = "Sink/Analyzer/Audio/LV2";
} else
klass_tags = "Filter/Effect/Audio/LV2";
details->klass = klass_tags;
GST_INFO ("tags : %s", details->klass);
gst_element_class_set_details (element_class, details);
g_free (details->longname);
g_free (details->author);
g_free (details);
klass->audio_in_portnums = g_new0 (gint, gsp_class->num_audio_in);
klass->audio_out_portnums = g_new0 (gint, gsp_class->num_audio_out);
klass->control_in_portnums = g_new0 (gint, gsp_class->num_control_in);
klass->control_out_portnums = g_new0 (gint, gsp_class->num_control_out);
audio_in_count = audio_out_count = control_in_count = control_out_count = 0;
for (j = 0; j < slv2_plugin_get_num_ports (lv2plugin); j++) {
SLV2Port port = slv2_plugin_get_port_by_index (lv2plugin, j);
gboolean is_input = slv2_port_is_a (lv2plugin, port, input_class);
if (slv2_port_is_a (lv2plugin, port, audio_class)) {
if (is_input)
klass->audio_in_portnums[audio_in_count++] = j;
else
klass->audio_out_portnums[audio_out_count++] = j;
} else if (slv2_port_is_a (lv2plugin, port, control_class)) {
if (is_input)
klass->control_in_portnums[control_in_count++] = j;
else
klass->control_out_portnums[control_out_count++] = j;
}
}
g_assert (audio_in_count == gsp_class->num_audio_in);
g_assert (audio_out_count == gsp_class->num_audio_out);
g_assert (control_in_count == gsp_class->num_control_in);
g_assert (control_out_count == gsp_class->num_control_out);
/*if (!LV2_IS_INPLACE_BROKEN (desc->Properties))
GST_SIGNAL_PROCESSOR_CLASS_SET_CAN_PROCESS_IN_PLACE (klass); */
klass->plugin = lv2plugin;
}
static gchar *
gst_lv2_class_get_param_name (GstLV2Class * klass, gint portnum)
{
SLV2Plugin lv2plugin = klass->plugin;
SLV2Port port = slv2_plugin_get_port_by_index (lv2plugin, portnum);
return g_strdup (slv2_value_as_string (slv2_port_get_symbol (lv2plugin,
port)));
}
static GParamSpec *
gst_lv2_class_get_param_spec (GstLV2Class * klass, gint portnum)
{
SLV2Plugin lv2plugin = klass->plugin;
SLV2Port port = slv2_plugin_get_port_by_index (lv2plugin, portnum);
SLV2Value lv2def, lv2min, lv2max;
GParamSpec *ret;
gchar *name;
gint perms;
gfloat lower = 0.0f, upper = 1.0f, def = 0.0f;
name = gst_lv2_class_get_param_name (klass, portnum);
perms = G_PARAM_READABLE;
if (slv2_port_is_a (lv2plugin, port, input_class))
perms |= G_PARAM_WRITABLE | G_PARAM_CONSTRUCT;
if (slv2_port_is_a (lv2plugin, port, control_class))
perms |= GST_PARAM_CONTROLLABLE;
if (slv2_port_has_property (lv2plugin, port, toggled_prop)) {
ret = g_param_spec_boolean (name, name, name, FALSE, perms);
g_free (name);
return ret;
}
slv2_port_get_range (lv2plugin, port, &lv2def, &lv2min, &lv2max);
if (lv2def)
def = slv2_value_as_float (lv2def);
if (lv2min)
lower = slv2_value_as_float (lv2min);
if (lv2max)
upper = slv2_value_as_float (lv2max);
if (def < lower) {
GST_WARNING ("%s has lower bound %f > default %f\n",
slv2_value_as_string (slv2_plugin_get_uri (lv2plugin)), lower, def);
lower = def;
}
if (def > upper) {
GST_WARNING ("%s has upper bound %f < default %f\n",
slv2_value_as_string (slv2_plugin_get_uri (lv2plugin)), upper, def);
upper = def;
}
if (slv2_port_has_property (lv2plugin, port, integer_prop))
ret = g_param_spec_int (name, name, name, lower, upper, def, perms);
else
ret = g_param_spec_float (name, name, name, lower, upper, def, perms);
g_free (name);
return ret;
}
static void
gst_lv2_class_init (GstLV2Class * klass, SLV2Plugin lv2plugin)
{
GObjectClass *gobject_class;
GstSignalProcessorClass *gsp_class;
gint i;
GST_DEBUG ("class_init %p", klass);
gobject_class = (GObjectClass *) klass;
gobject_class->set_property = gst_lv2_set_property;
gobject_class->get_property = gst_lv2_get_property;
gsp_class = GST_SIGNAL_PROCESSOR_CLASS (klass);
gsp_class->setup = gst_lv2_setup;
gsp_class->start = gst_lv2_start;
gsp_class->stop = gst_lv2_stop;
gsp_class->cleanup = gst_lv2_cleanup;
gsp_class->process = gst_lv2_process;
klass->plugin = lv2plugin;
/* register properties */
for (i = 0; i < gsp_class->num_control_in; i++) {
GParamSpec *p;
p = gst_lv2_class_get_param_spec (klass, klass->control_in_portnums[i]);
/* properties have an offset of 1 */
g_object_class_install_property (G_OBJECT_CLASS (klass), i + 1, p);
}
for (i = 0; i < gsp_class->num_control_out; i++) {
GParamSpec *p;
p = gst_lv2_class_get_param_spec (klass, klass->control_out_portnums[i]);
/* properties have an offset of 1, and we already added num_control_in */
g_object_class_install_property (G_OBJECT_CLASS (klass),
gsp_class->num_control_in + i + 1, p);
}
}
static void
gst_lv2_init (GstLV2 * lv2, GstLV2Class * klass)
{
#if 0
lv2->plugin = klass->plugin;
lv2->instance = NULL;
lv2->activated = FALSE;
lv2->inplace_broken = LV2_IS_INPLACE_BROKEN (lv2->descriptor->Properties);
#endif
}
static void
gst_lv2_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
#if 0
GstSignalProcessor *gsp;
GstSignalProcessorClass *gsp_class;
gsp = GST_SIGNAL_PROCESSOR (object);
gsp_class = GST_SIGNAL_PROCESSOR_GET_CLASS (object);
/* remember, properties have an offset of 1 */
prop_id--;
/* only input ports */
g_return_if_fail (prop_id < gsp_class->num_control_in);
/* now see what type it is */
switch (pspec->value_type) {
case G_TYPE_BOOLEAN:
gsp->control_in[prop_id] = g_value_get_boolean (value) ? 1.f : 0.f;
break;
case G_TYPE_INT:
gsp->control_in[prop_id] = g_value_get_int (value);
break;
case G_TYPE_FLOAT:
gsp->control_in[prop_id] = g_value_get_float (value);
break;
default:
g_assert_not_reached ();
}
#endif
}
static void
gst_lv2_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
#if 0
GstSignalProcessor *gsp;
GstSignalProcessorClass *gsp_class;
gfloat *controls;
gsp = GST_SIGNAL_PROCESSOR (object);
gsp_class = GST_SIGNAL_PROCESSOR_GET_CLASS (object);
/* remember, properties have an offset of 1 */
prop_id--;
if (prop_id < gsp_class->num_control_in) {
controls = gsp->control_in;
} else if (prop_id < gsp_class->num_control_in + gsp_class->num_control_out) {
controls = gsp->control_out;
prop_id -= gsp_class->num_control_in;
} else {
g_return_if_reached ();
}
/* now see what type it is */
switch (pspec->value_type) {
case G_TYPE_BOOLEAN:
g_value_set_boolean (value, controls[prop_id] > 0.5);
break;
case G_TYPE_INT:
g_value_set_int (value, CLAMP (controls[prop_id], G_MININT, G_MAXINT));
break;
case G_TYPE_FLOAT:
g_value_set_float (value, controls[prop_id]);
break;
default:
g_return_if_reached ();
}
#endif
}
static gboolean
gst_lv2_setup (GstSignalProcessor * gsp, guint sample_rate)
{
#if 0
GstLV2 *ladspa;
GstLV2Class *oclass;
GstSignalProcessorClass *gsp_class;
LV2_Descriptor *desc;
int i;
gsp_class = GST_SIGNAL_PROCESSOR_GET_CLASS (gsp);
ladspa = (GstLV2 *) gsp;
oclass = (GstLV2Class *) gsp_class;
desc = ladspa->descriptor;
g_return_val_if_fail (ladspa->handle == NULL, FALSE);
g_return_val_if_fail (ladspa->activated == FALSE, FALSE);
GST_DEBUG_OBJECT (ladspa, "instantiating the plugin at %d Hz", sample_rate);
ladspa->handle = desc->instantiate (desc, sample_rate);
g_return_val_if_fail (ladspa->handle != NULL, FALSE);
/* connect the control ports */
for (i = 0; i < gsp_class->num_control_in; i++)
desc->connect_port (ladspa->handle,
oclass->control_in_portnums[i], &(gsp->control_in[i]));
for (i = 0; i < gsp_class->num_control_out; i++)
desc->connect_port (ladspa->handle,
oclass->control_out_portnums[i], &(gsp->control_out[i]));
#endif
return TRUE;
}
static gboolean
gst_lv2_start (GstSignalProcessor * gsp)
{
#if 0
GstLV2 *ladspa;
LV2_Descriptor *desc;
ladspa = (GstLV2 *) gsp;
desc = ladspa->descriptor;
g_return_val_if_fail (ladspa->activated == FALSE, FALSE);
g_return_val_if_fail (ladspa->handle != NULL, FALSE);
GST_DEBUG_OBJECT (ladspa, "activating");
if (desc->activate)
desc->activate (ladspa->handle);
ladspa->activated = TRUE;
#endif
return TRUE;
}
static void
gst_lv2_stop (GstSignalProcessor * gsp)
{
#if 0
GstLV2 *ladspa;
LV2_Descriptor *desc;
ladspa = (GstLV2 *) gsp;
desc = ladspa->descriptor;
g_return_if_fail (ladspa->activated == TRUE);
g_return_if_fail (ladspa->handle != NULL);
GST_DEBUG_OBJECT (ladspa, "deactivating");
if (desc->activate)
desc->activate (ladspa->handle);
ladspa->activated = FALSE;
#endif
}
static void
gst_lv2_cleanup (GstSignalProcessor * gsp)
{
#if 0
GstLV2 *ladspa;
LV2_Descriptor *desc;
ladspa = (GstLV2 *) gsp;
desc = ladspa->descriptor;
g_return_if_fail (ladspa->activated == FALSE);
g_return_if_fail (ladspa->handle != NULL);
GST_DEBUG_OBJECT (ladspa, "cleaning up");
if (desc->cleanup)
desc->cleanup (ladspa->handle);
ladspa->handle = NULL;
#endif
}
static void
gst_lv2_process (GstSignalProcessor * gsp, guint nframes)
{
#if 0
GstSignalProcessorClass *gsp_class;
GstLV2 *ladspa;
GstLV2Class *oclass;
LV2_Descriptor *desc;
guint i;
gsp_class = GST_SIGNAL_PROCESSOR_GET_CLASS (gsp);
ladspa = (GstLV2 *) gsp;
oclass = (GstLV2Class *) gsp_class;
desc = ladspa->descriptor;
for (i = 0; i < gsp_class->num_audio_in; i++)
desc->connect_port (ladspa->handle, oclass->audio_in_portnums[i],
gsp->audio_in[i]);
for (i = 0; i < gsp_class->num_audio_out; i++)
desc->connect_port (ladspa->handle, oclass->audio_out_portnums[i],
gsp->audio_out[i]);
desc->run (ladspa->handle, nframes);
#endif
}
/* search the plugin path
*/
static gboolean
lv2_plugin_discover (void)
{
unsigned i;
SLV2Plugins plugins = slv2_world_get_all_plugins (world);
for (i = 0; i < slv2_plugins_size (plugins); ++i) {
SLV2Plugin lv2plugin = slv2_plugins_get_at (plugins, i);
GTypeInfo typeinfo = {
sizeof (GstLV2Class),
(GBaseInitFunc) gst_lv2_base_init,
NULL,
(GClassInitFunc) gst_lv2_class_init,
NULL,
lv2plugin,
sizeof (GstLV2),
0,
(GInstanceInitFunc) gst_lv2_init,
};
GType type;
/* construct the type name from plugin URI */
gchar *type_name = g_strdup_printf ("%s",
slv2_value_as_uri (slv2_plugin_get_uri (lv2plugin)));
g_strcanon (type_name, G_CSET_A_2_Z G_CSET_a_2_z G_CSET_DIGITS "-+", '-');
/* if it's already registered, drop it */
if (g_type_from_name (type_name))
goto next;
/* create the type */
type =
g_type_register_static (GST_TYPE_SIGNAL_PROCESSOR, type_name, &typeinfo,
0);
/* FIXME: not needed anymore when we can add pad templates, etc in class_init
* as class_data contains the LADSPA_Descriptor too */
g_type_set_qdata (type, GST_SLV2_PLUGIN_QDATA, (gpointer) lv2plugin);
if (!gst_element_register (gst_lv2_plugin, type_name, GST_RANK_NONE, type))
goto next;
next:
g_free (type_name);
}
return TRUE;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (lv2_debug, "lv2",
GST_DEBUG_FG_GREEN | GST_DEBUG_BG_BLACK | GST_DEBUG_BOLD, "LV2");
world = slv2_world_new ();
slv2_world_load_all (world);
audio_class = slv2_value_new_uri (world, SLV2_PORT_CLASS_AUDIO);
control_class = slv2_value_new_uri (world, SLV2_PORT_CLASS_CONTROL);
input_class = slv2_value_new_uri (world, SLV2_PORT_CLASS_INPUT);
output_class = slv2_value_new_uri (world, SLV2_PORT_CLASS_OUTPUT);
integer_prop =
slv2_value_new_uri (world, "http://lv2plug.in/ns/lv2core#integer");
toggled_prop =
slv2_value_new_uri (world, "http://lv2plug.in/ns/lv2core#toggled");
parent_class = g_type_class_ref (GST_TYPE_SIGNAL_PROCESSOR);
gst_lv2_plugin = plugin;
return lv2_plugin_discover ();
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"lv2",
"All LV2 plugins",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)