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-rw-r--r--ext/ladspa/gstladspa.c877
1 files changed, 877 insertions, 0 deletions
diff --git a/ext/ladspa/gstladspa.c b/ext/ladspa/gstladspa.c
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+++ b/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>
+ *
+ * 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.
+ */
+
+#include <string.h>
+#include <math.h>
+
+//#define DEBUG_ENABLED
+#include "gstladspa.h"
+#include "ladspa.h"
+#include "search.h"
+#include "utils.h"
+
+
+static GstPadTemplate*
+ladspa_src_factory (void)
+{
+ return
+ gst_padtemplate_new (
+ "src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ gst_caps_new (
+ "ladspa_src",
+ "audio/raw",
+ gst_props_new (
+ "format", GST_PROPS_STRING ("float"),
+ "layout", GST_PROPS_STRING ("gfloat"),
+ "intercept", GST_PROPS_FLOAT(0.0),
+ "slope", GST_PROPS_FLOAT(1.0),
+ "channels", GST_PROPS_INT (1),
+ "rate", GST_PROPS_INT_RANGE (0,G_MAXINT),
+ NULL)),
+ NULL);
+}
+
+static GstPadTemplate*
+ladspa_sink_factory (void)
+{
+ return
+ gst_padtemplate_new (
+ "sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ gst_caps_new (
+ "float2int_sink",
+ "audio/raw",
+ gst_props_new (
+ "format", GST_PROPS_STRING ("float"),
+ "layout", GST_PROPS_STRING ("gfloat"),
+ "intercept", GST_PROPS_FLOAT(0.0),
+ "slope", GST_PROPS_FLOAT(1.0),
+ "channels", GST_PROPS_INT (1),
+ "rate", GST_PROPS_INT_RANGE (0,G_MAXINT),
+ NULL)),
+ NULL);
+}
+
+enum {
+ ARG_0,
+ ARG_LOOP_BASED,
+ ARG_SAMPLERATE,
+ ARG_BUFFERSIZE,
+ ARG_LAST,
+};
+
+static GstPadTemplate *srctempl, *sinktempl;
+
+static void gst_ladspa_class_init (GstLADSPAClass *klass);
+static void gst_ladspa_init (GstLADSPA *ladspa);
+
+static GstPadNegotiateReturn gst_ladspa_negotiate_sink_mono (GstPad *pad, GstCaps **caps, gpointer *data);
+static GstPadNegotiateReturn gst_ladspa_negotiate_src_mono (GstPad *pad, GstCaps **caps, gpointer *data);
+static GstPadNegotiateReturn gst_ladspa_negotiate_src_get_mono (GstPad *pad, GstCaps **caps, gpointer *data);
+static void gst_ladspa_force_caps(GstLADSPA *ladspa, GstPad *pad);
+
+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_instantiate (GstLADSPA *ladspa);
+static void gst_ladspa_activate(GstLADSPA *ladspa);
+static void gst_ladspa_deactivate(GstLADSPA *ladspa);
+
+static GstElementStateReturn gst_ladspa_change_state (GstElement *element);
+static void gst_ladspa_loop (GstElement *element);
+static void gst_ladspa_chain_inplace_mono (GstPad *pad,GstBuffer *buf);
+static GstBuffer * gst_ladspa_get_mono(GstPad *pad);
+static GstBuffer * gst_ladspa_get(GstPad *pad);
+
+static GstElementClass *parent_class = NULL;
+//static guint gst_ladspa_signals[LAST_SIGNAL] = { 0 };
+
+static GstPlugin *ladspa_plugin;
+static GHashTable *ladspa_descriptors;
+
+static void
+gst_ladspa_class_init (GstLADSPAClass *klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+ LADSPA_Descriptor *desc;
+ gint i,current_portnum,sinkcount,srccount,controlcount;
+ gint hintdesc;
+ gint argtype,argperms;
+ GParamSpec *paramspec = NULL;
+ gchar *argname;
+
+ gobject_class = (GObjectClass*)klass;
+ gstelement_class = (GstElementClass*)klass;
+
+ gobject_class->set_property = gst_ladspa_set_property;
+ gobject_class->get_property = gst_ladspa_get_property;
+
+ gstelement_class->change_state = gst_ladspa_change_state;
+
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_LOOP_BASED,
+ g_param_spec_boolean("loop-based","loop-based","loop-based",
+ FALSE,G_PARAM_READWRITE));
+
+ // look up and store the ladspa descriptor
+ klass->descriptor = g_hash_table_lookup(ladspa_descriptors,GINT_TO_POINTER(G_TYPE_FROM_CLASS(klass)));
+ desc = klass->descriptor;
+
+ klass->numports = desc->PortCount;
+
+ klass->numsinkpads = 0;
+ klass->numsrcpads = 0;
+ klass->numcontrols = 0;
+
+ // walk through the ports, count the input, output and control ports
+ for (i=0;i<desc->PortCount;i++) {
+ if (LADSPA_IS_PORT_AUDIO(desc->PortDescriptors[i]) &&
+ LADSPA_IS_PORT_INPUT(desc->PortDescriptors[i])){
+ klass->numsinkpads++;
+ }
+
+ if (LADSPA_IS_PORT_AUDIO(desc->PortDescriptors[i]) &&
+ LADSPA_IS_PORT_OUTPUT(desc->PortDescriptors[i])){
+ klass->numsrcpads++;
+ }
+
+ if (LADSPA_IS_PORT_CONTROL(desc->PortDescriptors[i]) &&
+ LADSPA_IS_PORT_INPUT(desc->PortDescriptors[i])){
+ klass->numcontrols++;
+ }
+ }
+
+ klass->srcpad_portnums = g_new0(gint,klass->numsrcpads);
+ klass->sinkpad_portnums = g_new0(gint,klass->numsinkpads);
+ klass->control_portnums = g_new0(gint,klass->numcontrols);
+ sinkcount = 0;
+ srccount = 0;
+ controlcount = 0;
+
+ // walk through the ports, note the portnums for srcpads, sinkpads and control params
+ for (i=0;i<desc->PortCount;i++) {
+ if (LADSPA_IS_PORT_AUDIO(desc->PortDescriptors[i]) &&
+ LADSPA_IS_PORT_INPUT(desc->PortDescriptors[i])){
+ //g_print("input port %d\n", i);
+ klass->sinkpad_portnums[sinkcount++] = i;
+ }
+
+ if (LADSPA_IS_PORT_AUDIO(desc->PortDescriptors[i]) &&
+ LADSPA_IS_PORT_OUTPUT(desc->PortDescriptors[i])){
+ //g_print("output port %d\n", i);
+ klass->srcpad_portnums[srccount++] = i;
+ }
+
+ if (LADSPA_IS_PORT_CONTROL(desc->PortDescriptors[i]) &&
+ LADSPA_IS_PORT_INPUT(desc->PortDescriptors[i])){
+ //g_print("control port %d\n", i);
+ klass->control_portnums[controlcount++] = i;
+ }
+ }
+
+ // no sink pads - we'll use get mode and add params for samplerate and buffersize
+ if (klass->numsinkpads == 0 && klass->numsrcpads > 0){
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_SAMPLERATE,
+ g_param_spec_int("samplerate","samplerate","samplerate",
+ 0,G_MAXINT,44100,G_PARAM_READWRITE));
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_BUFFERSIZE,
+ g_param_spec_int("buffersize","buffersize","buffersize",
+ 0,G_MAXINT,64,G_PARAM_READWRITE));
+
+ }
+
+ // now build the contorl info from the control ports
+ klass->control_info = g_new0(ladspa_control_info,klass->numcontrols);
+
+ for (i=0;i<klass->numcontrols;i++) {
+
+ current_portnum = klass->control_portnums[i];
+
+ // short name for hint descriptor
+ hintdesc = desc->PortRangeHints[current_portnum].HintDescriptor;
+
+ // get the various bits
+ if (LADSPA_IS_HINT_TOGGLED(hintdesc))
+ klass->control_info[i].toggled = TRUE;
+ if (LADSPA_IS_HINT_LOGARITHMIC(hintdesc))
+ klass->control_info[i].logarithmic = TRUE;
+ if (LADSPA_IS_HINT_INTEGER(hintdesc))
+ klass->control_info[i].integer = TRUE;
+
+ // figure out the argument details
+ if (klass->control_info[i].toggled) argtype = G_TYPE_BOOLEAN;
+ else if (klass->control_info[i].integer) argtype = G_TYPE_INT;
+ else argtype = G_TYPE_FLOAT;
+
+ // grab the bounds
+ if (LADSPA_IS_HINT_BOUNDED_BELOW(hintdesc)) {
+ klass->control_info[i].lower = TRUE;
+ klass->control_info[i].lowerbound =
+ desc->PortRangeHints[current_portnum].LowerBound;
+ } else {
+ if (argtype==G_TYPE_INT) klass->control_info[i].lowerbound = (gfloat)G_MININT;
+ if (argtype==G_TYPE_FLOAT) klass->control_info[i].lowerbound = G_MINFLOAT;
+ }
+
+ if (LADSPA_IS_HINT_BOUNDED_ABOVE(hintdesc)) {
+ klass->control_info[i].upper = TRUE;
+ klass->control_info[i].upperbound =
+ desc->PortRangeHints[current_portnum].UpperBound;
+ if (LADSPA_IS_HINT_SAMPLE_RATE(hintdesc))
+ klass->control_info[i].samplerate = TRUE;
+ } else {
+ if (argtype==G_TYPE_INT) klass->control_info[i].upperbound = (gfloat)G_MAXINT;
+ if (argtype==G_TYPE_FLOAT) klass->control_info[i].upperbound = G_MAXFLOAT;
+ }
+
+ if (LADSPA_IS_PORT_INPUT(desc->PortDescriptors[current_portnum])) {
+ argperms = G_PARAM_READWRITE;
+ klass->control_info[i].writable = TRUE;
+ } else {
+ argperms = G_PARAM_READABLE;
+ klass->control_info[i].writable = FALSE;
+ }
+
+ klass->control_info[i].name = g_strdup(desc->PortNames[current_portnum]);
+ argname = g_strdup(klass->control_info[i].name);
+ // this is the same thing that param_spec_* will do
+ g_strcanon (argname, G_CSET_A_2_Z G_CSET_a_2_z G_CSET_DIGITS "-", '-');
+
+ // check for duplicate property names
+ if (g_object_class_find_property(G_OBJECT_CLASS(klass), argname) != NULL){
+ gint numarg=1;
+ gchar *numargname = g_strdup_printf("%s_%d",argname,numarg++);
+ while (g_object_class_find_property(G_OBJECT_CLASS(klass), numargname) != NULL){
+ g_free(numargname);
+ numargname = g_strdup_printf("%s_%d",argname,numarg++);
+ }
+ argname = numargname;
+ }
+
+ if (argtype==G_TYPE_BOOLEAN){
+ paramspec = g_param_spec_boolean(argname,argname,argname, FALSE, argperms);
+ } else if (argtype==G_TYPE_INT){
+ paramspec = g_param_spec_int(argname,argname,argname,
+ (gint)klass->control_info[i].lowerbound, (gint)klass->control_info[i].upperbound, 0, argperms);
+ } else {
+ paramspec = g_param_spec_float(argname,argname,argname,
+ klass->control_info[i].lowerbound, klass->control_info[i].upperbound,
+ (klass->control_info[i].lowerbound + klass->control_info[i].upperbound) / 2.0f, argperms);
+ }
+ g_object_class_install_property(G_OBJECT_CLASS(klass), i+ARG_LAST, paramspec);
+
+ g_print("added arg %s from %s\n",argname, klass->control_info[i].name);
+ }
+}
+
+static void
+gst_ladspa_init (GstLADSPA *ladspa)
+{
+ GstLADSPAClass *oclass = (GstLADSPAClass*)(G_OBJECT_GET_CLASS(ladspa));
+
+ LADSPA_Descriptor *desc;
+ gint i,sinkcount,srccount,controlcount;
+
+ desc = oclass->descriptor;
+ ladspa->descriptor = oclass->descriptor;
+
+ // allocate the various arrays
+ ladspa->srcpads = g_new0(GstPad*,oclass->numsrcpads);
+ ladspa->sinkpads = g_new0(GstPad*,oclass->numsinkpads);
+ ladspa->controls = g_new(gfloat,oclass->numcontrols);
+
+ // walk through the ports and add all the pads
+ sinkcount = 0;
+ srccount = 0;
+ controlcount = 0;
+ for (i=0;i<desc->PortCount;i++) {
+ if (LADSPA_IS_PORT_AUDIO(desc->PortDescriptors[i]) &&
+ LADSPA_IS_PORT_INPUT(desc->PortDescriptors[i])) {
+ ladspa->sinkpads[sinkcount] = gst_pad_new_from_template
+ (sinktempl, (gchar *)desc->PortNames[i]);
+ gst_element_add_pad(GST_ELEMENT(ladspa),ladspa->sinkpads[sinkcount]);
+ sinkcount++;
+ }
+ if (LADSPA_IS_PORT_AUDIO(desc->PortDescriptors[i]) &&
+ LADSPA_IS_PORT_OUTPUT(desc->PortDescriptors[i])) {
+ ladspa->srcpads[srccount] = gst_pad_new_from_template
+ (srctempl, (gchar *)desc->PortNames[i]);
+ gst_element_add_pad(GST_ELEMENT(ladspa),ladspa->srcpads[srccount]);
+ srccount++;
+ }
+ if (LADSPA_IS_PORT_CONTROL(desc->PortDescriptors[i]) &&
+ LADSPA_IS_PORT_INPUT(desc->PortDescriptors[i])) {
+
+ // use the lowerbound as the default value if it exists
+ if (oclass->control_info[controlcount].lower){
+ ladspa->controls[controlcount]=oclass->control_info[controlcount].lowerbound;
+ } else {
+ ladspa->controls[controlcount] = 0.0;
+ }
+ controlcount++;
+ }
+ }
+
+ ladspa->samplerate = 0;
+ ladspa->buffersize = 0;
+ ladspa->newcaps = FALSE;
+ ladspa->activated = FALSE;
+
+ // mono chain
+ if (sinkcount==1 && srccount==1){
+ //g_print("inplace mono chain mode\n");
+ gst_pad_set_negotiate_function (ladspa->sinkpads[0], gst_ladspa_negotiate_sink_mono);
+ gst_pad_set_chain_function(ladspa->sinkpads[0],gst_ladspa_chain_inplace_mono);
+ gst_pad_set_negotiate_function (ladspa->srcpads[0], gst_ladspa_negotiate_src_mono);
+ }
+
+ // mono get (no sink pads)
+ if (sinkcount==0 && srccount == 1){
+ //g_print("get mode\n");
+ ladspa->newcaps = TRUE;
+ ladspa->samplerate = 44100;
+ ladspa->buffersize = 64;
+ gst_pad_set_get_function(ladspa->srcpads[0],gst_ladspa_get_mono);
+ gst_pad_set_negotiate_function (ladspa->srcpads[0], gst_ladspa_negotiate_src_get_mono);
+ gst_ladspa_instantiate(ladspa);
+ }
+
+ // multi srcpad get
+ if (sinkcount==0 && srccount > 1){
+ //g_print("multi get mode\n");
+ ladspa->newcaps = TRUE;
+ ladspa->samplerate = 44100;
+ ladspa->buffersize = 64;
+ gst_pad_set_get_function(ladspa->srcpads[0],gst_ladspa_get);
+ gst_pad_set_negotiate_function (ladspa->srcpads[0], gst_ladspa_negotiate_src_get_mono);
+ gst_ladspa_instantiate(ladspa);
+ ladspa->buffers = g_new0(GstBuffer*,oclass->numsrcpads);
+ }
+}
+
+static GstPadNegotiateReturn
+gst_ladspa_negotiate_src_mono (GstPad *pad, GstCaps **caps, gpointer *data)
+{
+ GstLADSPA *ladspa = (GstLADSPA*)GST_OBJECT_PARENT (pad);
+
+ // have to instantiate ladspa plugin when samplerate changes (groan)
+ if (ladspa->samplerate != gst_caps_get_int (*caps, "rate")){
+ ladspa->samplerate = gst_caps_get_int (*caps, "rate");
+ if (!gst_ladspa_instantiate(ladspa)) return GST_PAD_NEGOTIATE_FAIL;
+ }
+ return gst_pad_negotiate_proxy (pad, ladspa->sinkpads[0], caps);
+}
+
+static GstPadNegotiateReturn
+gst_ladspa_negotiate_sink_mono (GstPad *pad, GstCaps **caps, gpointer *data)
+{
+ GstLADSPA *ladspa = (GstLADSPA*)GST_OBJECT_PARENT (pad);
+
+ // have to instantiate ladspa plugin when samplerate changes (groan)
+ if (ladspa->samplerate != gst_caps_get_int (*caps, "rate")){
+ ladspa->samplerate = gst_caps_get_int (*caps, "rate");
+ if (!gst_ladspa_instantiate(ladspa)) return GST_PAD_NEGOTIATE_FAIL;
+ }
+ return gst_pad_negotiate_proxy (pad, ladspa->srcpads[0], caps);
+}
+
+static GstPadNegotiateReturn
+gst_ladspa_negotiate_src_get_mono (GstPad *pad, GstCaps **caps, gpointer *data)
+{
+ GstLADSPA *ladspa;
+ //g_print("gst_ladspa_negotiate_src_get_mono\n");
+ if (*caps) {
+ g_return_val_if_fail (pad != NULL, GST_PAD_NEGOTIATE_FAIL);
+ ladspa = (GstLADSPA*)GST_OBJECT_PARENT (pad);
+ ladspa->samplerate = gst_caps_get_int (*caps, "rate");
+ if (!gst_ladspa_instantiate(ladspa)) return GST_PAD_NEGOTIATE_FAIL;
+ return GST_PAD_NEGOTIATE_AGREE;
+ }
+ return GST_PAD_NEGOTIATE_FAIL;
+}
+
+static void
+gst_ladspa_force_caps(GstLADSPA *ladspa, GstPad *pad) {
+
+ // g_print("forcing caps\n");
+ gst_pad_set_caps (pad, gst_caps_new (
+ "ladspa_src_caps",
+ "audio/raw",
+ gst_props_new (
+ "format", GST_PROPS_STRING ("float"),
+ "layout", GST_PROPS_STRING ("gfloat"),
+ "intercept", GST_PROPS_FLOAT(0.0),
+ "slope", GST_PROPS_FLOAT(1.0),
+ "rate", GST_PROPS_INT (ladspa->samplerate),
+ "channels", GST_PROPS_INT (1),
+ NULL
+ )
+ ));
+ ladspa->newcaps=FALSE;
+}
+
+static void
+gst_ladspa_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
+{
+ GstLADSPA *ladspa = (GstLADSPA*)object;
+ gint cid = prop_id - ARG_LAST;
+ GstLADSPAClass *oclass;
+ ladspa_control_info *control_info;
+ gfloat val=0.0;
+
+ // these are only registered in get mode
+ switch (prop_id) {
+ case ARG_SAMPLERATE:
+ ladspa->samplerate = g_value_get_int (value);
+ ladspa->newcaps=TRUE;
+ break;
+ case ARG_BUFFERSIZE:
+ ladspa->buffersize = g_value_get_int (value);
+ break;
+ }
+
+ // is it a ladspa plugin arg?
+ if (cid<0) return;
+
+/*
+ if (id == ARG_LOOP_BASED) {
+ // we can only do this in NULL state
+ g_return_if_fail (GST_STATE(object) != GST_STATE_NULL);
+ ladspa->loopbased = g_value_get_boolean (value);
+ if (ladspa->loopbased) {
+ gst_element_set_loop_function (GST_ELEMENT (ladspa), gst_ladspa_loop);
+ } else {
+ gst_element_set_loop_function (GST_ELEMENT (ladspa), NULL);
+ }
+ }
+*/
+
+ oclass = (GstLADSPAClass*)(G_OBJECT_GET_CLASS (object));
+
+ // verify it exists and is a control (not a port)
+ g_return_if_fail(cid < oclass->numcontrols);
+
+ control_info = &(oclass->control_info[cid]);
+ g_return_if_fail (control_info->name != NULL);
+
+ // check to see if it's writable
+ g_return_if_fail (control_info->writable);
+
+ // g_print("set arg %s to %f\n",control_info->name,ladspa->controls[cid]);
+
+ // now see what type it is
+ if (control_info->toggled) {
+ if (g_value_get_boolean (value))
+ ladspa->controls[cid] = 1.0;
+ else
+ ladspa->controls[cid] = 0.0;
+ } else if (control_info->integer) {
+ val = (gfloat)g_value_get_int (value);
+ ladspa->controls[cid] = val;
+ } else {
+ val = g_value_get_float (value);
+ ladspa->controls[cid] = val;
+ }
+}
+
+static void
+gst_ladspa_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
+{
+ GstLADSPA *ladspa = (GstLADSPA*)object;
+ gint cid = prop_id - ARG_LAST;
+ GstLADSPAClass *oclass = (GstLADSPAClass*)(G_OBJECT_GET_CLASS (object));
+ ladspa_control_info *control_info;
+
+ // these are only registered in get mode
+ switch (prop_id){
+ case ARG_SAMPLERATE:
+ g_value_set_int (value, ladspa->samplerate);
+ break;
+ case ARG_BUFFERSIZE:
+ g_value_set_int (value, ladspa->buffersize);
+ break;
+ }
+
+ if (cid<0) return;
+ // verify it exists and is a control (not a port)
+ if (cid >= oclass->numcontrols) return;
+ control_info = &(oclass->control_info[cid]);
+ if (control_info->name == NULL) return;
+
+ //g_print("got arg %s as %f\n",control_info->name,ladspa->controls[cid]);
+
+ // now see what type it is
+ if (control_info->toggled) {
+ if (ladspa->controls[cid] == 1.0)
+ g_value_set_boolean (value, TRUE);
+ else
+ g_value_set_boolean (value, FALSE);
+ } else if (control_info->integer) {
+ g_value_set_int (value, (gint)ladspa->controls[cid]);
+ } else {
+ g_value_set_float (value, ladspa->controls[cid]);
+ }
+}
+
+static gboolean
+gst_ladspa_instantiate (GstLADSPA *ladspa)
+{
+ LADSPA_Descriptor *desc;
+ int i;
+ GstLADSPAClass *oclass = (GstLADSPAClass*)(G_OBJECT_GET_CLASS (ladspa));
+ gboolean was_activated;
+
+ desc = ladspa->descriptor;
+
+ // check for old handle
+ was_activated = ladspa->activated;
+ if (ladspa->handle != NULL){
+ gst_ladspa_deactivate(ladspa);
+ desc->cleanup(ladspa->handle);
+ }
+
+ // instantiate the plugin
+ ladspa->handle = desc->instantiate(desc,ladspa->samplerate);
+ g_return_val_if_fail (ladspa->handle != NULL, FALSE);
+
+ // walk through the ports and add all the arguments
+ for (i=0;i<oclass->numcontrols;i++) {
+ // connect the argument to the plugin
+ //g_print("added control port %d\n", oclass->control_portnums[i]);
+ desc->connect_port(ladspa->handle,
+ oclass->control_portnums[i],
+ &(ladspa->controls[i]));
+ }
+
+ // reactivate if it was activated before the reinstantiation
+ if (was_activated){
+ gst_ladspa_activate(ladspa);
+ }
+ return TRUE;
+}
+
+static GstElementStateReturn
+gst_ladspa_change_state (GstElement *element)
+{
+ LADSPA_Descriptor *desc;
+ GstLADSPA *ladspa = (GstLADSPA*)element;
+// GstLADSPAClass *oclass = (GstLADSPAClass*)(G_OBJECT(ladspa)->klass);
+ desc = ladspa->descriptor;
+
+ //g_print("changing state\n");
+ switch (GST_STATE_TRANSITION (element)) {
+ case GST_STATE_NULL_TO_READY:
+ gst_ladspa_activate(ladspa);
+ break;
+ case GST_STATE_READY_TO_NULL:
+ gst_ladspa_deactivate(ladspa);
+ break;
+ default:
+ break;
+ }
+
+ if (GST_ELEMENT_CLASS (parent_class)->change_state)
+ return GST_ELEMENT_CLASS (parent_class)->change_state (element);
+
+ return GST_STATE_SUCCESS;
+}
+
+static void
+gst_ladspa_activate(GstLADSPA *ladspa)
+{
+ LADSPA_Descriptor *desc;
+ desc = ladspa->descriptor;
+
+ if (ladspa->activated){
+ gst_ladspa_deactivate(ladspa);
+ }
+
+ //g_print("activating\n");
+
+ // activate the plugin (function might be null)
+ if (desc->activate != NULL){
+ desc->activate(ladspa->handle);
+ }
+
+ ladspa->activated = TRUE;
+}
+
+static void
+gst_ladspa_deactivate(GstLADSPA *ladspa)
+{
+ LADSPA_Descriptor *desc;
+ desc = ladspa->descriptor;
+
+ //g_print("deactivating\n");
+
+ // deactivate the plugin (function might be null)
+ if (ladspa->activated && desc->deactivate != NULL){
+ desc->deactivate(ladspa->handle);
+ }
+ ladspa->activated = FALSE;
+}
+
+static void
+gst_ladspa_loop (GstElement *element)
+{
+ int i;
+ GstLADSPA *ladspa = (GstLADSPA *)element;
+ GstLADSPAClass *oclass = (GstLADSPAClass*)(G_OBJECT_GET_CLASS (ladspa));
+ LADSPA_Descriptor *desc;
+
+ desc = ladspa->descriptor;
+ do {
+ printf("looping something\n");
+
+ // first get all the necessary data from the input ports
+ for (i=0;i<oclass->numsinkpads;i++){
+ ladspa->buffers[i] = gst_pad_pull(ladspa->sinkpads[i]);
+ printf("pulling buffer %d\n", i);
+ }
+
+ for (i=0;i<oclass->numsinkpads;i++) {
+// desc->connect_port(ladspa->handle,i,&(ladspa->controls[i]));
+ }
+
+ for (i=0;i<oclass->numsrcpads && i<oclass->numsinkpads;i++){
+ printf("pushing buffer %d\n", i);
+ gst_pad_push (ladspa->srcpads[i], ladspa->buffers[i]);
+ ladspa->buffers[i] = NULL;
+ }
+
+ } while (!GST_ELEMENT_IS_COTHREAD_STOPPING (element));
+}
+
+static void
+gst_ladspa_chain_inplace_mono (GstPad *pad,GstBuffer *buf)
+{
+ LADSPA_Descriptor *desc;
+ LADSPA_Data *data;
+ unsigned long num_samples;
+
+ GstLADSPA *ladspa;
+ GstLADSPAClass *oclass;
+
+ g_return_if_fail(pad != NULL);
+ g_return_if_fail(GST_IS_PAD(pad));
+ g_return_if_fail(buf != NULL);
+
+ ladspa = (GstLADSPA *)gst_pad_get_parent (pad);
+ g_return_if_fail(ladspa != NULL);
+
+ // this might happen if caps nego hasn't happened
+ g_return_if_fail(ladspa->handle != NULL);
+
+ oclass = (GstLADSPAClass*)(G_OBJECT_GET_CLASS (ladspa));
+ data=(LADSPA_Data*)GST_BUFFER_DATA(buf);
+ num_samples = GST_BUFFER_SIZE(buf) / sizeof(gfloat);
+
+ desc = ladspa->descriptor;
+
+ desc->connect_port(ladspa->handle,oclass->sinkpad_portnums[0],data);
+ desc->connect_port(ladspa->handle,oclass->srcpad_portnums[0],data);
+
+ desc->run(ladspa->handle,num_samples);
+
+ desc->connect_port(ladspa->handle,oclass->sinkpad_portnums[0],NULL);
+ desc->connect_port(ladspa->handle,oclass->srcpad_portnums[0],NULL);
+
+ gst_pad_push (ladspa->srcpads[0], buf);
+}
+
+static GstBuffer *
+gst_ladspa_get_mono(GstPad *pad)
+{
+ LADSPA_Descriptor *desc;
+ LADSPA_Data *data;
+
+ GstLADSPA *ladspa;
+ GstLADSPAClass *oclass;
+ GstBuffer *buf;
+
+ g_return_val_if_fail(pad != NULL, NULL);
+ g_return_val_if_fail(GST_IS_PAD(pad), NULL);
+
+ ladspa = (GstLADSPA *)gst_pad_get_parent (pad);
+ g_return_val_if_fail(ladspa != NULL, NULL);
+
+ // this might happen if caps nego hasn't happened
+ g_return_val_if_fail(ladspa->handle != NULL, NULL);
+
+ oclass = (GstLADSPAClass*)(G_OBJECT_GET_CLASS(ladspa));
+
+ if (ladspa->newcaps) {
+ gst_ladspa_force_caps(ladspa, ladspa->srcpads[0]);
+ }
+
+ buf = gst_buffer_new();
+ g_return_val_if_fail (buf, NULL);
+ data = g_new(LADSPA_Data, ladspa->buffersize);
+ GST_BUFFER_DATA(buf) = (gpointer) data;
+ GST_BUFFER_SIZE(buf) = sizeof(LADSPA_Data) * ladspa->buffersize;
+ GST_BUFFER_TIMESTAMP(buf) = ladspa->timestamp;
+
+ desc = ladspa->descriptor;
+ desc->connect_port(ladspa->handle,oclass->srcpad_portnums[0],data);
+ desc->run(ladspa->handle,(unsigned long)ladspa->buffersize);
+ desc->connect_port(ladspa->handle,oclass->srcpad_portnums[0],NULL);
+
+ return buf;
+}
+
+static GstBuffer *
+gst_ladspa_get(GstPad *pad)
+{
+ LADSPA_Descriptor *desc;
+ LADSPA_Data *data;
+
+ GstLADSPA *ladspa;
+ GstLADSPAClass *oclass;
+ GstBuffer *buf;
+
+ g_return_val_if_fail(pad != NULL, NULL);
+ g_return_val_if_fail(GST_IS_PAD(pad), NULL);
+
+ ladspa = (GstLADSPA *)gst_pad_get_parent (pad);
+ g_return_val_if_fail(ladspa != NULL, NULL);
+
+ // this might happen if caps nego hasn't happened
+ g_return_val_if_fail(ladspa->handle != NULL, NULL);
+
+ oclass = (GstLADSPAClass*)(G_OBJECT_GET_CLASS(ladspa));
+
+ if (ladspa->newcaps) {
+ gst_ladspa_force_caps(ladspa, ladspa->srcpads[0]);
+ }
+
+ buf = gst_buffer_new();
+ g_return_val_if_fail (buf, NULL);
+ data = g_new(LADSPA_Data, ladspa->buffersize);
+ GST_BUFFER_DATA(buf) = (gpointer) data;
+ GST_BUFFER_SIZE(buf) = sizeof(LADSPA_Data) * ladspa->buffersize;
+ GST_BUFFER_TIMESTAMP(buf) = ladspa->timestamp;
+ ladspa->timestamp+= ladspa->buffersize * ladspa->samplerate * 10^9;
+
+ desc = ladspa->descriptor;
+ desc->connect_port(ladspa->handle,oclass->srcpad_portnums[0],data);
+ desc->run(ladspa->handle,(unsigned long)ladspa->buffersize);
+ desc->connect_port(ladspa->handle,oclass->srcpad_portnums[0],NULL);
+
+ return buf;
+}
+
+static void
+ladspa_describe_plugin(const char *pcFullFilename,
+ void *pvPluginHandle,
+ LADSPA_Descriptor_Function pfDescriptorFunction)
+{
+ const LADSPA_Descriptor *desc;
+ int i,j;
+
+ GstElementDetails *details;
+ GTypeInfo typeinfo = {
+ sizeof(GstLADSPAClass), NULL,
+ NULL,
+ (GClassInitFunc)gst_ladspa_class_init,
+ NULL,
+ NULL,
+ sizeof(GstLADSPA),
+ 0,
+ (GInstanceInitFunc)gst_ladspa_init,
+ };
+ GType type;
+ GstElementFactory *factory;
+
+ // walk through all the plugins in this pluginlibrary
+ i = 0;
+ while ((desc = pfDescriptorFunction(i++))) {
+ gchar *type_name;
+
+ // 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)) {
+ g_free(type_name);
+ continue;
+ }
+ // create the type now
+ type = g_type_register_static(GST_TYPE_ELEMENT, type_name , &typeinfo, 0);
+
+ // construct the element details struct
+ details = g_new0(GstElementDetails,1);
+ details->longname = g_strdup(desc->Name);
+ details->klass = "Filter/LADSPA";
+ details->description = details->longname;
+ details->version = g_strdup_printf("%ld",desc->UniqueID);
+ details->author = g_strdup(desc->Maker);
+ details->copyright = g_strdup(desc->Copyright);
+
+ // register the plugin with gstreamer
+ factory = gst_elementfactory_new(type_name,type,details);
+ g_return_if_fail(factory != NULL);
+ gst_plugin_add_feature (ladspa_plugin, GST_PLUGIN_FEATURE (factory));
+
+ // add this plugin to the hash
+ g_hash_table_insert(ladspa_descriptors,
+ GINT_TO_POINTER(type),
+ (gpointer)desc);
+
+
+ // only add sink padtemplate if there are sinkpads
+ for (j=0;j<desc->PortCount;j++) {
+ if (LADSPA_IS_PORT_AUDIO(desc->PortDescriptors[j]) &&
+ LADSPA_IS_PORT_INPUT(desc->PortDescriptors[j])) {
+ sinktempl = ladspa_sink_factory();
+ gst_elementfactory_add_padtemplate (factory, sinktempl);
+ break;
+ }
+ }
+
+ srctempl = ladspa_src_factory();
+ gst_elementfactory_add_padtemplate (factory, srctempl);
+
+ }
+}
+
+static gboolean
+plugin_init (GModule *module, GstPlugin *plugin)
+{
+
+ ladspa_descriptors = g_hash_table_new(NULL,NULL);
+ parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
+
+ ladspa_plugin = plugin;
+
+ LADSPAPluginSearch(ladspa_describe_plugin);
+
+ return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+ GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "ladspa",
+ plugin_init
+};
+