C++ (Cpp) LADSPA_Descriptor示例

示例#1

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;
}

示例#2

文件： gstladspa.c 项目： collects/gst-plugins-bad

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;
}

示例#3

文件： gstladspa.c 项目： collects/gst-plugins-bad

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;
}

示例#4

文件： gstladspa.c 项目： collects/gst-plugins-bad

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;
}

示例#5

文件： gstladspa.c 项目： collects/gst-plugins-bad

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);
}