static gboolean
gst_ladspa_setup (GstSignalProcessor * gsp, guint sample_rate)
{
GstLADSPA *ladspa;
GstLADSPAClass *oclass;
GstSignalProcessorClass *gsp_class;
LADSPA_Descriptor *desc;
int 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", 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]));
return TRUE;
}
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_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 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_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);
}