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gstreamer/ext/ladspa/gstladspa.c

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/* 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.
*/
/**
* SECTION:element-ladspa
* @short_description: bridge for ladspa (Linux Audio Developer's Simple Plugin API)
*
* The ladspa (Linux Audio Developer's Simple Plugin API) element is a bridge
* for plugins using the <ulink url="http://www.ladspa.org/">ladspa</ulink> API.
* It scans all installed ladspa plugins and registers them as gstreamer
* elements. If available it can also parse lrdf files and use the metadata for
* element classification.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <math.h>
#include <gst/audio/audio.h>
#include "gstladspa.h"
#include <ladspa.h> /* main ladspa sdk include file */
#ifdef HAVE_LRDF
#include <lrdf.h>
#endif
/* 1.0 and the 1.1 preliminary headers don't define a version, but 1.1 final
does */
#ifndef LADSPA_VERSION
#define LADSPA_VERSION "1.0"
#endif
#define GST_LADSPA_DEFAULT_PATH \
"/usr/lib/ladspa" G_SEARCHPATH_SEPARATOR_S \
"/usr/local/lib/ladspa" G_SEARCHPATH_SEPARATOR_S \
LIBDIR "/ladspa"
static void gst_ladspa_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_ladspa_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_ladspa_setup (GstSignalProcessor * sigproc, GstCaps * caps);
static gboolean gst_ladspa_start (GstSignalProcessor * sigproc);
static void gst_ladspa_stop (GstSignalProcessor * sigproc);
static void gst_ladspa_cleanup (GstSignalProcessor * sigproc);
static void gst_ladspa_process (GstSignalProcessor * sigproc, guint nframes);
static GstSignalProcessorClass *parent_class;
static GstPlugin *ladspa_plugin;
GST_DEBUG_CATEGORY_STATIC (ladspa_debug);
#define GST_CAT_DEFAULT ladspa_debug
static GQuark descriptor_quark = 0;
static void
gst_ladspa_base_init (gpointer g_class)
{
GstLADSPAClass *klass = (GstLADSPAClass *) g_class;
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
GstSignalProcessorClass *gsp_class = GST_SIGNAL_PROCESSOR_CLASS (g_class);
LADSPA_Descriptor *desc;
guint j, audio_in_count, audio_out_count, control_in_count, control_out_count;
const gchar *klass_tags;
gchar *longname, *author;
#ifdef HAVE_LRDF
gchar *uri;
#endif
gchar *extra_klass_tags = NULL;
GST_DEBUG ("base_init %p", g_class);
desc = (LADSPA_Descriptor *) g_type_get_qdata (G_OBJECT_CLASS_TYPE (klass),
descriptor_quark);
g_assert (desc);
klass->descriptor = desc;
/* 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 < desc->PortCount; j++) {
LADSPA_PortDescriptor p = desc->PortDescriptors[j];
if (LADSPA_IS_PORT_AUDIO (p)) {
gchar *name = g_strdup ((gchar *) desc->PortNames[j]);
/* FIXME: group stereo pairs into a stereo pad
* ladspa-fx have "XXX (Left)" and "XXX (Right)"
* where XXX={In,Input,Out,Output}
*/
GST_DEBUG ("LADSPA port name: \"%s\"", name);
/* replaces all spaces with underscores, and then remaining special chars
* with '-'
* FIXME: why, pads can have any name
*/
g_strdelimit (name, " ", '_');
g_strcanon (name, G_CSET_A_2_Z G_CSET_a_2_z G_CSET_DIGITS "_-><=", '-');
GST_DEBUG ("GStreamer pad name: \"%s\"", name);
if (LADSPA_IS_PORT_INPUT (p))
gst_signal_processor_class_add_pad_template (gsp_class, name,
GST_PAD_SINK, gsp_class->num_audio_in++, 1);
else
gst_signal_processor_class_add_pad_template (gsp_class, name,
GST_PAD_SRC, gsp_class->num_audio_out++, 1);
g_free (name);
} else if (LADSPA_IS_PORT_CONTROL (p)) {
if (LADSPA_IS_PORT_INPUT (p))
gsp_class->num_control_in++;
else
gsp_class->num_control_out++;
}
}
longname = g_locale_to_utf8 (desc->Name, -1, NULL, NULL, NULL);
if (!longname)
longname = g_strdup ("no description available");
author = g_locale_to_utf8 (desc->Maker, -1, NULL, NULL, NULL);
if (!author)
author = g_strdup ("no author available");
#ifdef HAVE_LRDF
/* libldrf support, we want to get extra class information here */
uri = g_strdup_printf (LADSPA_BASE "%ld", desc->UniqueID);
if (uri) {
lrdf_statement query = { 0, };
lrdf_uris *uris;
gchar *str, *base_type = NULL;
GST_DEBUG ("uri (id=%d) : %s", desc->UniqueID, uri);
/* we can take this directly from 'desc', keep this example for future
attributes.
if ((str = lrdf_get_setting_metadata (uri, "title"))) {
GST_DEBUG ("title : %s", str);
}
if ((str = lrdf_get_setting_metadata (uri, "creator"))) {
GST_DEBUG ("creator : %s", str);
}
*/
/* get the rdf:type for this plugin */
query.subject = uri;
query.predicate = (char *) RDF_BASE "type";
query.object = (char *) "?";
query.next = NULL;
uris = lrdf_match_multi (&query);
if (uris) {
if (uris->count == 1) {
base_type = g_strdup (uris->items[0]);
GST_DEBUG ("base_type : %s", base_type);
}
lrdf_free_uris (uris);
}
/* query taxonomy */
if (base_type) {
uris = lrdf_get_all_superclasses (base_type);
if (uris) {
guint32 j;
for (j = 0; j < uris->count; j++) {
GST_LOG ("parent_type_uri : %s", uris->items[j]);
if ((str = lrdf_get_label (uris->items[j]))) {
GST_DEBUG ("parent_type_label : %s", str);
if (extra_klass_tags) {
gchar *old_tags = extra_klass_tags;
extra_klass_tags = g_strconcat (extra_klass_tags, "/", str, NULL);
g_free (old_tags);
} else {
extra_klass_tags = g_strconcat ("/", str, NULL);
}
}
}
lrdf_free_uris (uris);
}
g_free (base_type);
}
/* we can use this for the presets
uris = lrdf_get_setting_uris (desc->UniqueID);
if (uris) {
guint32 j;
for (j = 0; j < uris->count; j++) {
GST_INFO ("setting_uri : %s", uris->items[j]);
if ((str = lrdf_get_label (uris->items[j]))) {
GST_INFO ("setting_label : %s", str);
}
}
lrdf_free_uris (uris);
}
*/
}
g_free (uri);
#endif
if (gsp_class->num_audio_in == 0)
klass_tags = "Source/Audio/LADSPA";
else if (gsp_class->num_audio_out == 0) {
if (gsp_class->num_control_out == 0)
klass_tags = "Sink/Audio/LADSPA";
else
klass_tags = "Sink/Analyzer/Audio/LADSPA";
} else
klass_tags = "Filter/Effect/Audio/LADSPA";
#ifdef HAVE_LRDF
if (extra_klass_tags) {
char *s = g_strconcat (klass_tags, extra_klass_tags, NULL);
g_free (extra_klass_tags);
extra_klass_tags = s;
}
#endif
GST_INFO ("tags : %s", klass_tags);
gst_element_class_set_metadata (element_class, longname,
extra_klass_tags ? extra_klass_tags : klass_tags, longname, author);
g_free (longname);
g_free (author);
g_free (extra_klass_tags);
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 < desc->PortCount; j++) {
LADSPA_PortDescriptor p = desc->PortDescriptors[j];
if (LADSPA_IS_PORT_AUDIO (p)) {
if (LADSPA_IS_PORT_INPUT (p))
klass->audio_in_portnums[audio_in_count++] = j;
else
klass->audio_out_portnums[audio_out_count++] = j;
} else if (LADSPA_IS_PORT_CONTROL (p)) {
if (LADSPA_IS_PORT_INPUT (p))
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 (!LADSPA_IS_INPLACE_BROKEN (desc->Properties))
GST_SIGNAL_PROCESSOR_CLASS_SET_CAN_PROCESS_IN_PLACE (klass);
klass->descriptor = desc;
}
static gchar *
gst_ladspa_class_get_param_name (GstLADSPAClass * klass, gint portnum)
{
LADSPA_Descriptor *desc;
gchar *ret, *paren;
desc = klass->descriptor;
ret = g_strdup (desc->PortNames[portnum]);
paren = g_strrstr (ret, " (");
if (paren != NULL)
*paren = '\0';
/* this is the same thing that param_spec_* will do */
g_strcanon (ret, G_CSET_A_2_Z G_CSET_a_2_z G_CSET_DIGITS "-", '-');
/* satisfy glib2 (argname[0] must be [A-Za-z]) */
if (!((ret[0] >= 'a' && ret[0] <= 'z') || (ret[0] >= 'A' && ret[0] <= 'Z'))) {
gchar *tempstr = ret;
ret = g_strconcat ("param-", ret, NULL);
g_free (tempstr);
}
/* check for duplicate property names */
if (g_object_class_find_property (G_OBJECT_CLASS (klass), ret)) {
gint n = 1;
gchar *nret = g_strdup_printf ("%s-%d", ret, n++);
while (g_object_class_find_property (G_OBJECT_CLASS (klass), nret)) {
g_free (nret);
nret = g_strdup_printf ("%s-%d", ret, n++);
}
g_free (ret);
ret = nret;
}
GST_DEBUG ("built property name '%s' from port name '%s'", ret,
desc->PortNames[portnum]);
return ret;
}
static GParamSpec *
gst_ladspa_class_get_param_spec (GstLADSPAClass * klass, gint portnum)
{
LADSPA_Descriptor *desc;
GParamSpec *ret;
gchar *name;
gint hintdesc, perms;
gfloat lower, upper, def;
desc = klass->descriptor;
name = gst_ladspa_class_get_param_name (klass, portnum);
perms = G_PARAM_READABLE;
if (LADSPA_IS_PORT_INPUT (desc->PortDescriptors[portnum]))
perms |= G_PARAM_WRITABLE | G_PARAM_CONSTRUCT;
if (LADSPA_IS_PORT_CONTROL (desc->PortDescriptors[portnum]))
perms |= GST_PARAM_CONTROLLABLE;
/* short name for hint descriptor */
hintdesc = desc->PortRangeHints[portnum].HintDescriptor;
if (LADSPA_IS_HINT_TOGGLED (hintdesc)) {
ret = g_param_spec_boolean (name, name, name, FALSE, perms);
g_free (name);
return ret;
}
if (LADSPA_IS_HINT_BOUNDED_BELOW (hintdesc))
lower = desc->PortRangeHints[portnum].LowerBound;
else
lower = -G_MAXFLOAT;
if (LADSPA_IS_HINT_BOUNDED_ABOVE (hintdesc))
upper = desc->PortRangeHints[portnum].UpperBound;
else
upper = G_MAXFLOAT;
if (LADSPA_IS_HINT_SAMPLE_RATE (hintdesc)) {
/* FIXME! */
lower *= 44100;
upper *= 44100;
}
if (LADSPA_IS_HINT_INTEGER (hintdesc)) {
lower = CLAMP (lower, G_MININT, G_MAXINT);
upper = CLAMP (upper, G_MININT, G_MAXINT);
}
/* default to lower bound */
def = lower;
#ifdef LADSPA_IS_HINT_HAS_DEFAULT
if (LADSPA_IS_HINT_HAS_DEFAULT (hintdesc)) {
if (LADSPA_IS_HINT_DEFAULT_0 (hintdesc))
def = 0.0;
else if (LADSPA_IS_HINT_DEFAULT_1 (hintdesc))
def = 1.0;
else if (LADSPA_IS_HINT_DEFAULT_100 (hintdesc))
def = 100.0;
else if (LADSPA_IS_HINT_DEFAULT_440 (hintdesc))
def = 440.0;
if (LADSPA_IS_HINT_DEFAULT_MINIMUM (hintdesc))
def = lower;
else if (LADSPA_IS_HINT_DEFAULT_MAXIMUM (hintdesc))
def = upper;
else if (LADSPA_IS_HINT_LOGARITHMIC (hintdesc)) {
if (LADSPA_IS_HINT_DEFAULT_LOW (hintdesc))
def = exp (0.75 * log (lower) + 0.25 * log (upper));
else if (LADSPA_IS_HINT_DEFAULT_MIDDLE (hintdesc))
def = exp (0.5 * log (lower) + 0.5 * log (upper));
else if (LADSPA_IS_HINT_DEFAULT_HIGH (hintdesc))
def = exp (0.25 * log (lower) + 0.75 * log (upper));
} else {
if (LADSPA_IS_HINT_DEFAULT_LOW (hintdesc))
def = 0.75 * lower + 0.25 * upper;
else if (LADSPA_IS_HINT_DEFAULT_MIDDLE (hintdesc))
def = 0.5 * lower + 0.5 * upper;
else if (LADSPA_IS_HINT_DEFAULT_HIGH (hintdesc))
def = 0.25 * lower + 0.75 * upper;
}
}
#endif /* LADSPA_IS_HINT_HAS_DEFAULT */
if (lower > upper) {
gfloat tmp;
/* silently swap */
tmp = lower;
lower = upper;
upper = tmp;
}
def = CLAMP (def, lower, upper);
if (LADSPA_IS_HINT_INTEGER (hintdesc)) {
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_ladspa_class_init (GstLADSPAClass * klass, LADSPA_Descriptor * desc)
{
GObjectClass *gobject_class;
GstSignalProcessorClass *gsp_class;
GParamSpec *p;
gint i, ix;
GST_DEBUG ("class_init %p", klass);
gobject_class = (GObjectClass *) klass;
gobject_class->set_property = gst_ladspa_set_property;
gobject_class->get_property = gst_ladspa_get_property;
gsp_class = GST_SIGNAL_PROCESSOR_CLASS (klass);
gsp_class->setup = gst_ladspa_setup;
gsp_class->start = gst_ladspa_start;
gsp_class->stop = gst_ladspa_stop;
gsp_class->cleanup = gst_ladspa_cleanup;
gsp_class->process = gst_ladspa_process;
/* properties have an offset of 1 */
ix = 1;
/* register properties */
for (i = 0; i < gsp_class->num_control_in; i++, ix++) {
p = gst_ladspa_class_get_param_spec (klass, klass->control_in_portnums[i]);
g_object_class_install_property (gobject_class, ix, p);
}
for (i = 0; i < gsp_class->num_control_out; i++, ix++) {
p = gst_ladspa_class_get_param_spec (klass, klass->control_out_portnums[i]);
g_object_class_install_property (gobject_class, ix, p);
}
}
static void
gst_ladspa_init (GstLADSPA * ladspa, GstLADSPAClass * klass)
{
ladspa->descriptor = klass->descriptor;
ladspa->activated = FALSE;
ladspa->inplace_broken =
LADSPA_IS_INPLACE_BROKEN (ladspa->descriptor->Properties);
}
static void
gst_ladspa_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
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 ();
}
}
static void
gst_ladspa_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
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 ();
}
}
static gboolean
gst_ladspa_setup (GstSignalProcessor * gsp, GstCaps * caps)
{
GstLADSPA *ladspa;
GstLADSPAClass *oclass;
GstSignalProcessorClass *gsp_class;
LADSPA_Descriptor *desc;
gint i;
gsp_class = GST_SIGNAL_PROCESSOR_GET_CLASS (gsp);
ladspa = (GstLADSPA *) gsp;
oclass = (GstLADSPAClass *) 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",
gsp->sample_rate);
if (!(ladspa->handle = desc->instantiate (desc, gsp->sample_rate)))
goto no_instance;
/* 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]));
return TRUE;
no_instance:
{
GST_WARNING_OBJECT (gsp, "could not create instance");
return FALSE;
}
}
static gboolean
gst_ladspa_start (GstSignalProcessor * gsp)
{
GstLADSPA *ladspa;
LADSPA_Descriptor *desc;
ladspa = (GstLADSPA *) 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;
return TRUE;
}
static void
gst_ladspa_stop (GstSignalProcessor * gsp)
{
GstLADSPA *ladspa;
LADSPA_Descriptor *desc;
ladspa = (GstLADSPA *) 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;
}
static void
gst_ladspa_cleanup (GstSignalProcessor * gsp)
{
GstLADSPA *ladspa;
LADSPA_Descriptor *desc;
ladspa = (GstLADSPA *) 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;
}
static void
gst_ladspa_process (GstSignalProcessor * gsp, guint nframes)
{
GstSignalProcessorClass *gsp_class;
GstLADSPA *ladspa;
GstLADSPAClass *oclass;
LADSPA_Descriptor *desc;
guint i;
gsp_class = GST_SIGNAL_PROCESSOR_GET_CLASS (gsp);
ladspa = (GstLADSPA *) gsp;
oclass = (GstLADSPAClass *) 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);
}
static void
ladspa_describe_plugin (LADSPA_Descriptor_Function descriptor_function)
{
const LADSPA_Descriptor *desc;
gint i;
/* walk through all the plugins in this pluginlibrary */
i = 0;
while ((desc = descriptor_function (i++))) {
gchar *type_name;
GTypeInfo typeinfo = {
sizeof (GstLADSPAClass),
(GBaseInitFunc) gst_ladspa_base_init,
NULL,
(GClassInitFunc) gst_ladspa_class_init,
NULL,
desc,
sizeof (GstLADSPA),
0,
(GInstanceInitFunc) gst_ladspa_init,
};
GType type;
/* construct the type */
type_name = g_strdup_printf ("ladspa-%s", desc->Label);
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 now */
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, descriptor_quark, (gpointer) desc);
if (!gst_element_register (ladspa_plugin, type_name, GST_RANK_NONE, type))
goto next;
next:
g_free (type_name);
}
}
#ifdef HAVE_LRDF
static gboolean
ladspa_rdf_directory_search (const char *dir_name)
{
GDir *dir;
gchar *file_name, *file_uri;
const gchar *entry_name;
gint ok;
GST_INFO ("scanning directory for rdfs \"%s\"", dir_name);
dir = g_dir_open (dir_name, 0, NULL);
if (!dir)
return FALSE;
while ((entry_name = g_dir_read_name (dir))) {
file_name = g_build_filename (dir_name, entry_name, NULL);
file_uri = g_strconcat ("file://", file_name, NULL);
ok = lrdf_read_file (file_uri);
GST_INFO ("read %s : %d", file_uri, ok);
g_free (file_uri);
g_free (file_name);
}
g_dir_close (dir);
return TRUE;
}
#endif
/* search just the one directory.
*/
static gboolean
ladspa_plugin_directory_search (const char *dir_name)
{
GDir *dir;
gchar *file_name;
const gchar *entry_name;
LADSPA_Descriptor_Function descriptor_function;
GModule *plugin;
gboolean ok = FALSE;
GST_INFO ("scanning directory for plugins \"%s\"", dir_name);
dir = g_dir_open (dir_name, 0, NULL);
if (!dir)
return FALSE;
while ((entry_name = g_dir_read_name (dir))) {
file_name = g_build_filename (dir_name, entry_name, NULL);
plugin =
g_module_open (file_name, G_MODULE_BIND_LAZY | G_MODULE_BIND_LOCAL);
if (plugin) {
/* the file is a shared library */
if (g_module_symbol (plugin, "ladspa_descriptor",
(gpointer *) & descriptor_function)) {
/* we've found a ladspa_descriptor function, now introspect it. */
GST_INFO ("describe %s", file_name);
ladspa_describe_plugin (descriptor_function);
ok = TRUE;
} else {
/* it was a library, but not a LADSPA one. Unload it. */
g_module_close (plugin);
}
}
g_free (file_name);
}
g_dir_close (dir);
return ok;
}
/* search the plugin path
*/
static gboolean
ladspa_plugin_path_search (void)
{
const gchar *search_path;
gchar *ladspa_path;
gchar **paths;
gint i, j, path_entries;
gboolean res = FALSE, skip;
#ifdef HAVE_LRDF
gchar *pos, *prefix, *rdf_path;
#endif
search_path = g_getenv ("LADSPA_PATH");
if (search_path) {
ladspa_path =
g_strdup_printf ("%s" G_SEARCHPATH_SEPARATOR_S GST_LADSPA_DEFAULT_PATH,
search_path);
} else {
ladspa_path = g_strdup (GST_LADSPA_DEFAULT_PATH);
}
paths = g_strsplit (ladspa_path, G_SEARCHPATH_SEPARATOR_S, 0);
path_entries = g_strv_length (paths);
GST_INFO ("%d dirs in search paths \"%s\"", path_entries, ladspa_path);
#ifdef HAVE_LRDF
for (i = 0; i < path_entries; i++) {
skip = FALSE;
for (j = 0; j < i; j++) {
if (!strcmp (paths[i], paths[j])) {
skip = TRUE;
break;
}
}
if (skip)
break;
/* transform path: /usr/lib/ladspa -> /usr/share/ladspa/rdf/
* yes, this is ugly, but lrdf has not searchpath
*/
if ((pos = strstr (paths[i], "/lib/ladspa"))) {
prefix = g_strndup (paths[i], (pos - paths[i]));
rdf_path = g_build_filename (prefix, "share", "ladspa", "rdf", NULL);
ladspa_rdf_directory_search (rdf_path);
g_free (rdf_path);
g_free (prefix);
}
}
#endif
for (i = 0; i < path_entries; i++) {
skip = FALSE;
for (j = 0; j < i; j++) {
if (!strcmp (paths[i], paths[j])) {
skip = TRUE;
break;
}
}
if (skip)
break;
res |= ladspa_plugin_directory_search (paths[i]);
}
g_strfreev (paths);
g_free (ladspa_path);
return res;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (ladspa_debug, "ladspa",
GST_DEBUG_FG_GREEN | GST_DEBUG_BG_BLACK | GST_DEBUG_BOLD, "LADSPA");
gst_plugin_add_dependency_simple (plugin,
"LADSPA_PATH",
GST_LADSPA_DEFAULT_PATH, NULL, GST_PLUGIN_DEPENDENCY_FLAG_NONE);
#ifdef HAVE_LRDF
lrdf_init ();
#endif
parent_class = g_type_class_ref (GST_TYPE_SIGNAL_PROCESSOR);
ladspa_plugin = plugin;
descriptor_quark = g_quark_from_static_string ("ladspa-descriptor");
if (!ladspa_plugin_path_search ()) {
GST_WARNING ("no ladspa plugins found, check LADSPA_PATH");
}
/* we don't want to fail, even if there are no elements registered */
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
ladspa,
"All LADSPA plugins",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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