gstlfocontrolsource.c

gnash 在pc和嵌入式下开发需要的源码

      if (!G_IS_VALUE (&self->priv->amplitude)) {
        g_value_init (&self->priv->amplitude, type);
        g_value_set_ulong (&self->priv->amplitude, 0);
      }

      if (!G_IS_VALUE (&self->priv->offset)) {
        g_value_init (&self->priv->offset, type);
        g_value_set_ulong (&self->priv->offset, tpspec->default_value);
      }
      break;
    }
    case G_TYPE_INT64:{
      GParamSpecInt64 *tpspec = G_PARAM_SPEC_INT64 (pspec);

      g_value_init (&self->priv->minimum_value, type);
      g_value_set_int64 (&self->priv->minimum_value, tpspec->minimum);
      g_value_init (&self->priv->maximum_value, type);
      g_value_set_int64 (&self->priv->maximum_value, tpspec->maximum);
      if (!G_IS_VALUE (&self->priv->amplitude)) {
        g_value_init (&self->priv->amplitude, type);
        g_value_set_int64 (&self->priv->amplitude, 0);
      }

      if (!G_IS_VALUE (&self->priv->offset)) {
        g_value_init (&self->priv->offset, type);
        g_value_set_int64 (&self->priv->offset, tpspec->default_value);
      }
      break;
    }
    case G_TYPE_UINT64:{
      GParamSpecUInt64 *tpspec = G_PARAM_SPEC_UINT64 (pspec);

      g_value_init (&self->priv->minimum_value, type);
      g_value_set_uint64 (&self->priv->minimum_value, tpspec->minimum);
      g_value_init (&self->priv->maximum_value, type);
      g_value_set_uint64 (&self->priv->maximum_value, tpspec->maximum);
      if (!G_IS_VALUE (&self->priv->amplitude)) {
        g_value_init (&self->priv->amplitude, type);
        g_value_set_uint64 (&self->priv->amplitude, 0);
      }

      if (!G_IS_VALUE (&self->priv->offset)) {
        g_value_init (&self->priv->offset, type);
        g_value_set_uint64 (&self->priv->offset, tpspec->default_value);
      }
      break;
    }
    case G_TYPE_FLOAT:{
      GParamSpecFloat *tpspec = G_PARAM_SPEC_FLOAT (pspec);

      g_value_init (&self->priv->minimum_value, type);
      g_value_set_float (&self->priv->minimum_value, tpspec->minimum);
      g_value_init (&self->priv->maximum_value, type);
      g_value_set_float (&self->priv->maximum_value, tpspec->maximum);
      if (!G_IS_VALUE (&self->priv->amplitude)) {
        g_value_init (&self->priv->amplitude, type);
        g_value_set_float (&self->priv->amplitude, 0.0);
      }

      if (!G_IS_VALUE (&self->priv->offset)) {
        g_value_init (&self->priv->offset, type);
        g_value_set_float (&self->priv->offset, tpspec->default_value);
      }
      break;
    }
    case G_TYPE_DOUBLE:{
      GParamSpecDouble *tpspec = G_PARAM_SPEC_DOUBLE (pspec);

      g_value_init (&self->priv->minimum_value, type);
      g_value_set_double (&self->priv->minimum_value, tpspec->minimum);
      g_value_init (&self->priv->maximum_value, type);
      g_value_set_double (&self->priv->maximum_value, tpspec->maximum);
      if (!G_IS_VALUE (&self->priv->amplitude)) {
        g_value_init (&self->priv->amplitude, type);
        g_value_set_float (&self->priv->amplitude, 0.0);
      }

      if (!G_IS_VALUE (&self->priv->offset)) {
        g_value_init (&self->priv->offset, type);
        g_value_set_float (&self->priv->offset, tpspec->default_value);
      }
      break;
    }
    default:
      GST_WARNING ("incomplete implementation for paramspec type '%s'",
          G_PARAM_SPEC_TYPE_NAME (pspec));
      ret = FALSE;
      break;
  }

  if (ret) {
    GValue amp = { 0, }
    , off = {
    0,};

    /* This should never fail unless the user already set amplitude or offset
     * with an incompatible type before _bind () */
    if (!g_value_type_transformable (G_VALUE_TYPE (&self->priv->amplitude),
            base)
        || !g_value_type_transformable (G_VALUE_TYPE (&self->priv->offset),
            base)) {
      GST_WARNING ("incompatible types for amplitude or offset");
      gst_lfo_control_source_reset (self);
      return FALSE;
    }

    /* Generate copies and transform to the correct type */
    g_value_init (&amp, base);
    g_value_transform (&self->priv->amplitude, &amp);
    g_value_init (&off, base);
    g_value_transform (&self->priv->offset, &off);

    ret = gst_lfo_control_source_set_waveform (self, self->priv->waveform);

    g_value_unset (&self->priv->amplitude);
    g_value_init (&self->priv->amplitude, self->priv->base);
    g_value_transform (&amp, &self->priv->amplitude);

    g_value_unset (&self->priv->offset);
    g_value_init (&self->priv->offset, self->priv->base);
    g_value_transform (&off, &self->priv->offset);

    g_value_unset (&amp);
    g_value_unset (&off);
  }

  if (!ret)
    gst_lfo_control_source_reset (self);

  return ret;
}

static void
gst_lfo_control_source_init (GstLFOControlSource * self)
{
  self->priv =
      G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_LFO_CONTROL_SOURCE,
      GstLFOControlSourcePrivate);
  self->priv->waveform = GST_LFO_WAVEFORM_SINE;
  self->priv->frequency = 1.0;
  self->priv->period = GST_SECOND / self->priv->frequency;
  self->priv->timeshift = 0;

  self->lock = g_mutex_new ();
}

static void
gst_lfo_control_source_finalize (GObject * obj)
{
  GstLFOControlSource *self = GST_LFO_CONTROL_SOURCE (obj);

  gst_lfo_control_source_reset (self);

  if (self->lock) {
    g_mutex_free (self->lock);
    self->lock = NULL;
  }

  G_OBJECT_CLASS (parent_class)->finalize (obj);
}

static void
gst_lfo_control_source_dispose (GObject * obj)
{
  G_OBJECT_CLASS (parent_class)->dispose (obj);
}

static void
gst_lfo_control_source_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec)
{
  GstLFOControlSource *self = GST_LFO_CONTROL_SOURCE (object);

  switch (prop_id) {
    case PROP_WAVEFORM:
      g_mutex_lock (self->lock);
      gst_lfo_control_source_set_waveform (self, g_value_get_enum (value));
      g_mutex_unlock (self->lock);
      break;
    case PROP_FREQUENCY:{
      gdouble frequency = g_value_get_double (value);

      g_return_if_fail (frequency > 0
          || ((GstClockTime) (GST_SECOND / frequency)) != 0);

      g_mutex_lock (self->lock);
      self->priv->frequency = frequency;
      self->priv->period = GST_SECOND / frequency;
      g_mutex_unlock (self->lock);
      break;
    }
    case PROP_TIMESHIFT:
      g_mutex_lock (self->lock);
      self->priv->timeshift = g_value_get_uint64 (value);
      g_mutex_unlock (self->lock);
      break;
    case PROP_AMPLITUDE:{
      GValue *val = g_value_get_boxed (value);

      if (self->priv->type != G_TYPE_INVALID) {
        g_return_if_fail (g_value_type_transformable (self->priv->type,
                G_VALUE_TYPE (val)));

        g_mutex_lock (self->lock);
        if (G_IS_VALUE (&self->priv->amplitude))
          g_value_unset (&self->priv->amplitude);

        g_value_init (&self->priv->amplitude, self->priv->type);
        g_value_transform (val, &self->priv->amplitude);
        g_mutex_unlock (self->lock);
      } else {
        g_mutex_lock (self->lock);
        if (G_IS_VALUE (&self->priv->amplitude))
          g_value_unset (&self->priv->amplitude);

        g_value_init (&self->priv->amplitude, G_VALUE_TYPE (val));
        g_value_copy (val, &self->priv->amplitude);
        g_mutex_unlock (self->lock);
      }

      break;
    }
    case PROP_OFFSET:{
      GValue *val = g_value_get_boxed (value);

      if (self->priv->type != G_TYPE_INVALID) {
        g_return_if_fail (g_value_type_transformable (self->priv->type,
                G_VALUE_TYPE (val)));

        g_mutex_lock (self->lock);
        if (G_IS_VALUE (&self->priv->offset))
          g_value_unset (&self->priv->offset);

        g_value_init (&self->priv->offset, self->priv->type);
        g_value_transform (val, &self->priv->offset);
        g_mutex_unlock (self->lock);
      } else {
        g_mutex_lock (self->lock);
        if (G_IS_VALUE (&self->priv->offset))
          g_value_unset (&self->priv->offset);

        g_value_init (&self->priv->offset, G_VALUE_TYPE (val));
        g_value_copy (val, &self->priv->offset);
        g_mutex_unlock (self->lock);
      }

      break;
    }
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

static void
gst_lfo_control_source_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * pspec)
{
  GstLFOControlSource *self = GST_LFO_CONTROL_SOURCE (object);

  switch (prop_id) {
    case PROP_WAVEFORM:
      g_value_set_enum (value, self->priv->waveform);
      break;
    case PROP_FREQUENCY:
      g_value_set_double (value, self->priv->frequency);
      break;
    case PROP_TIMESHIFT:
      g_value_set_uint64 (value, self->priv->timeshift);
      break;
    case PROP_AMPLITUDE:
      g_value_set_boxed (value, &self->priv->amplitude);
      break;
    case PROP_OFFSET:
      g_value_set_boxed (value, &self->priv->offset);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

static void
gst_lfo_control_source_class_init (GstLFOControlSourceClass * klass)
{
  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
  GstControlSourceClass *csource_class = GST_CONTROL_SOURCE_CLASS (klass);

  parent_class = g_type_class_peek_parent (klass);
  g_type_class_add_private (klass, sizeof (GstLFOControlSourcePrivate));

  gobject_class->finalize = gst_lfo_control_source_finalize;
  gobject_class->dispose = gst_lfo_control_source_dispose;
  gobject_class->set_property = gst_lfo_control_source_set_property;
  gobject_class->get_property = gst_lfo_control_source_get_property;

  csource_class->bind = gst_lfo_control_source_bind;

  /**
   * GstLFOControlSource:waveform
   *
   * Specifies the waveform that should be used for this #GstLFOControlSource.
   * 
   **/
  g_object_class_install_property (gobject_class, PROP_WAVEFORM,
      g_param_spec_enum ("waveform", "Waveform", "Waveform",
          GST_TYPE_LFO_WAVEFORM, GST_LFO_WAVEFORM_SINE, G_PARAM_READWRITE));

  /**
   * GstLFOControlSource:frequency
   *
   * Specifies the frequency that should be used for the waveform
   * of this #GstLFOControlSource. It should be large enough
   * so that the period is longer than one nanosecond.
   * 
   **/
  g_object_class_install_property (gobject_class, PROP_FREQUENCY,
      g_param_spec_double ("frequency", "Frequency",
          "Frequency of the waveform", 0.0, G_MAXDOUBLE, 1.0,
          G_PARAM_READWRITE));

  /**
   * GstLFOControlSource:timeshift
   *
   * Specifies the timeshift to the right that should be used for the waveform
   * of this #GstLFOControlSource in nanoseconds.
   *
   * To get a n nanosecond shift to the left use
   * "(GST_SECOND / frequency) - n".
   *
   **/
  g_object_class_install_property (gobject_class, PROP_TIMESHIFT,
      g_param_spec_uint64 ("timeshift", "Timeshift",
          "Timeshift of the waveform to the right", 0, G_MAXUINT64, 0,
          G_PARAM_READWRITE));

  /**
   * GstLFOControlSource:amplitude
   *
   * Specifies the amplitude for the waveform of this #GstLFOControlSource.
   *
   * It should be given as a #GValue with a type that can be transformed
   * to the type of the bound property.
   **/
  g_object_class_install_property (gobject_class, PROP_AMPLITUDE,
      g_param_spec_boxed ("amplitude", "Amplitude", "Amplitude of the waveform",
          G_TYPE_VALUE, G_PARAM_READWRITE));

  /**
   * GstLFOControlSource:offset
   *
   * Specifies the offset for the waveform of this #GstLFOControlSource.
   *
   * It should be given as a #GValue with a type that can be transformed
   * to the type of the bound property.
   **/
  g_object_class_install_property (gobject_class, PROP_OFFSET,
      g_param_spec_boxed ("offset", "Offset", "Offset of the waveform",
          G_TYPE_VALUE, G_PARAM_READWRITE));
}