Exemplos de GST_STEREO em C++ (Cpp)

Exemplo n.º 1

Arquivo: gststereo.c Projeto: Lachann/gst-plugins-bad

static GstFlowReturn
gst_stereo_transform_ip (GstBaseTransform * base, GstBuffer * outbuf)
{
  GstStereo *stereo = GST_STEREO (base);
  gint samples;
  gint i;
  gdouble avg, ldiff, rdiff, tmp;
  gdouble mul = stereo->stereo;
  gint16 *data;
  GstMapInfo info;

  if (!gst_buffer_map (outbuf, &info, GST_MAP_READWRITE))
    return GST_FLOW_ERROR;

  data = (gint16 *) info.data;
  samples = info.size / 2;

  if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (outbuf)))
    gst_object_sync_values (GST_OBJECT (stereo), GST_BUFFER_TIMESTAMP (outbuf));

  if (stereo->active) {
    for (i = 0; i < samples / 2; i += 2) {
      avg = (data[i] + data[i + 1]) / 2;
      ldiff = data[i] - avg;
      rdiff = data[i + 1] - avg;

      tmp = avg + ldiff * mul;
      if (tmp < -32768)
        tmp = -32768;
      if (tmp > 32767)
        tmp = 32767;
      data[i] = tmp;

      tmp = avg + rdiff * mul;
      if (tmp < -32768)
        tmp = -32768;
      if (tmp > 32767)
        tmp = 32767;
      data[i + 1] = tmp;
    }
  }

  gst_buffer_unmap (outbuf, &info);

  return GST_FLOW_OK;
}

Exemplo n.º 2

Arquivo: gststereo.c Projeto: Lachann/gst-plugins-bad

static void
gst_stereo_get_property (GObject * object, guint prop_id, GValue * value,
    GParamSpec * pspec)
{
  GstStereo *stereo = GST_STEREO (object);

  switch (prop_id) {
    case ARG_ACTIVE:
      g_value_set_boolean (value, stereo->active);
      break;
    case ARG_STEREO:
      g_value_set_float (value, stereo->stereo / 10.0);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

Exemplo n.º 3

Arquivo: gststereo.c Projeto: drothlis/gst-plugins-bad

static void
gst_stereo_set_property (GObject * object, guint prop_id, const GValue * value,
    GParamSpec * pspec)
{
  GstStereo *stereo;

  g_return_if_fail (GST_IS_STEREO (object));
  stereo = GST_STEREO (object);

  switch (prop_id) {
    case ARG_ACTIVE:
      stereo->active = g_value_get_boolean (value);
      break;
    case ARG_STEREO:
      stereo->stereo = g_value_get_float (value) * 10.0;
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

Exemplo n.º 4

Arquivo: gststereo.c Projeto: drothlis/gst-plugins-bad

static GstFlowReturn
gst_stereo_transform_ip (GstBaseTransform * base, GstBuffer * outbuf)
{
  GstStereo *stereo = GST_STEREO (base);
  gint16 *data = (gint16 *) GST_BUFFER_DATA (outbuf);
  gint samples = GST_BUFFER_SIZE (outbuf) / 2;
  gint i;
  gdouble avg, ldiff, rdiff, tmp;
  gdouble mul = stereo->stereo;

  if (!gst_buffer_is_writable (outbuf))
    return GST_FLOW_OK;

  if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (outbuf)))
    gst_object_sync_values (GST_OBJECT (stereo), GST_BUFFER_TIMESTAMP (outbuf));

  if (stereo->active) {
    for (i = 0; i < samples / 2; i += 2) {
      avg = (data[i] + data[i + 1]) / 2;
      ldiff = data[i] - avg;
      rdiff = data[i + 1] - avg;

      tmp = avg + ldiff * mul;
      if (tmp < -32768)
        tmp = -32768;
      if (tmp > 32767)
        tmp = 32767;
      data[i] = tmp;

      tmp = avg + rdiff * mul;
      if (tmp < -32768)
        tmp = -32768;
      if (tmp > 32767)
        tmp = 32767;
      data[i + 1] = tmp;
    }
  }

  return GST_FLOW_OK;
}