gstinterpolationcontrolsource.c

gnash 在pc和嵌入式下开发需要的源码

      break;
    }
    case G_TYPE_DOUBLE:{
      GParamSpecDouble *tpspec = G_PARAM_SPEC_DOUBLE (pspec);

      g_value_init (&self->priv->default_value, type);
      g_value_set_double (&self->priv->default_value, tpspec->default_value);
      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);
      break;
    }
    case G_TYPE_BOOLEAN:{
      GParamSpecBoolean *tpspec = G_PARAM_SPEC_BOOLEAN (pspec);

      g_value_init (&self->priv->default_value, type);
      g_value_set_boolean (&self->priv->default_value, tpspec->default_value);
      break;
    }
    case G_TYPE_ENUM:{
      GParamSpecEnum *tpspec = G_PARAM_SPEC_ENUM (pspec);

      g_value_init (&self->priv->default_value, type);
      g_value_set_enum (&self->priv->default_value, tpspec->default_value);
      break;
    }
    case G_TYPE_STRING:{
      GParamSpecString *tpspec = G_PARAM_SPEC_STRING (pspec);

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

  if (ret) {
    self->priv->valid_cache = FALSE;
    self->priv->nvalues = 0;
  } else {
    gst_interpolation_control_source_reset (self);
  }

  return ret;
}

/*
 * gst_control_point_compare:
 * @p1: a pointer to a #GstControlPoint
 * @p2: a pointer to a #GstControlPoint
 *
 * Compare function for g_list operations that operates on two #GstControlPoint
 * parameters.
 */
static gint
gst_control_point_compare (gconstpointer p1, gconstpointer p2)
{
  GstClockTime ct1 = ((GstControlPoint *) p1)->timestamp;
  GstClockTime ct2 = ((GstControlPoint *) p2)->timestamp;

  return ((ct1 < ct2) ? -1 : ((ct1 == ct2) ? 0 : 1));
}

/*
 * gst_control_point_find:
 * @p1: a pointer to a #GstControlPoint
 * @p2: a pointer to a #GstClockTime
 *
 * Compare function for g_list operations that operates on a #GstControlPoint and
 * a #GstClockTime.
 */
static gint
gst_control_point_find (gconstpointer p1, gconstpointer p2)
{
  GstClockTime ct1 = ((GstControlPoint *) p1)->timestamp;
  GstClockTime ct2 = *(GstClockTime *) p2;

  return ((ct1 < ct2) ? -1 : ((ct1 == ct2) ? 0 : 1));
}

static void
gst_interpolation_control_source_set_internal (GstInterpolationControlSource *
    self, GstClockTime timestamp, GValue * value)
{
  GstControlPoint *cp;
  GList *node;

  /* check if a control point for the timestamp already exists */
  if ((node = g_list_find_custom (self->priv->values, &timestamp,
              gst_control_point_find))) {
    cp = node->data;
    g_value_reset (&cp->value);
    g_value_copy (value, &cp->value);
  } else {
    /* create a new GstControlPoint */
    cp = g_new0 (GstControlPoint, 1);
    cp->timestamp = timestamp;
    g_value_init (&cp->value, self->priv->type);
    g_value_copy (value, &cp->value);
    /* and sort it into the prop->values list */
    self->priv->values =
        g_list_insert_sorted (self->priv->values, cp,
        gst_control_point_compare);
    self->priv->nvalues++;
  }
  self->priv->valid_cache = FALSE;
}

/**
 * gst_interpolation_control_source_set:
 * @self: the #GstInterpolationControlSource object
 * @timestamp: the time the control-change is scheduled for
 * @value: the control-value
 *
 * Set the value of given controller-handled property at a certain time.
 *
 * Returns: FALSE if the values couldn't be set, TRUE otherwise.
 */
gboolean
gst_interpolation_control_source_set (GstInterpolationControlSource * self,
    GstClockTime timestamp, GValue * value)
{
  g_return_val_if_fail (GST_IS_INTERPOLATION_CONTROL_SOURCE (self), FALSE);
  g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (timestamp), FALSE);
  g_return_val_if_fail (G_IS_VALUE (value), FALSE);
  g_return_val_if_fail (G_VALUE_TYPE (value) == self->priv->type, FALSE);

  g_mutex_lock (self->lock);
  gst_interpolation_control_source_set_internal (self, timestamp, value);
  g_mutex_unlock (self->lock);

  return TRUE;
}

/**
 * gst_interpolation_control_source_set_from_list:
 * @self: the #GstInterpolationControlSource object
 * @timedvalues: a list with #GstTimedValue items
 *
 * Sets multiple timed values at once.
 *
 * Returns: FALSE if the values couldn't be set, TRUE otherwise.
 */
gboolean
gst_interpolation_control_source_set_from_list (GstInterpolationControlSource *
    self, GSList * timedvalues)
{
  GSList *node;
  GstTimedValue *tv;
  gboolean res = FALSE;

  g_return_val_if_fail (GST_IS_INTERPOLATION_CONTROL_SOURCE (self), FALSE);

  for (node = timedvalues; node; node = g_slist_next (node)) {
    tv = node->data;
    if (!GST_CLOCK_TIME_IS_VALID (tv->timestamp)) {
      GST_WARNING ("GstTimedValued with invalid timestamp passed to %s",
          GST_FUNCTION);
    } else if (!G_IS_VALUE (&tv->value)) {
      GST_WARNING ("GstTimedValued with invalid value passed to %s",
          GST_FUNCTION);
    } else if (G_VALUE_TYPE (&tv->value) != self->priv->type) {
      GST_WARNING ("incompatible value type for property");
    } else {
      g_mutex_lock (self->lock);
      gst_interpolation_control_source_set_internal (self, tv->timestamp,
          &tv->value);
      g_mutex_unlock (self->lock);
      res = TRUE;
    }
  }
  return res;
}

/**
 * gst_interpolation_control_source_unset:
 * @self: the #GstInterpolationControlSource object
 * @timestamp: the time the control-change should be removed from
 *
 * Used to remove the value of given controller-handled property at a certain
 * time.
 *
 * Returns: FALSE if the value couldn't be unset (i.e. not found, TRUE otherwise.
 */
gboolean
gst_interpolation_control_source_unset (GstInterpolationControlSource * self,
    GstClockTime timestamp)
{
  GList *node;
  gboolean res = FALSE;

  g_return_val_if_fail (GST_IS_INTERPOLATION_CONTROL_SOURCE (self), FALSE);
  g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (timestamp), FALSE);

  g_mutex_lock (self->lock);
  /* check if a control point for the timestamp exists */
  if ((node = g_list_find_custom (self->priv->values, &timestamp,
              gst_control_point_find))) {
    GstControlPoint *cp = node->data;

    if (cp->timestamp == 0) {
      /* Restore the default node */
      g_value_reset (&cp->value);
      g_value_copy (&self->priv->default_value, &cp->value);
    } else {
      if (node == self->priv->last_requested_value)
        self->priv->last_requested_value = NULL;
      gst_control_point_free (node->data);      /* free GstControlPoint */
      self->priv->values = g_list_delete_link (self->priv->values, node);
      self->priv->nvalues--;
    }
    self->priv->valid_cache = FALSE;
    res = TRUE;
  }
  g_mutex_unlock (self->lock);

  return res;
}

/**
 * gst_interpolation_control_source_unset_all:
 * @self: the #GstInterpolationControlSource object
 *
 * Used to remove all time-stamped values of given controller-handled property
 *
 */
void
gst_interpolation_control_source_unset_all (GstInterpolationControlSource *
    self)
{
  g_return_if_fail (GST_IS_INTERPOLATION_CONTROL_SOURCE (self));

  g_mutex_lock (self->lock);
  /* free GstControlPoint structures */
  g_list_foreach (self->priv->values, (GFunc) gst_control_point_free, NULL);
  g_list_free (self->priv->values);
  self->priv->last_requested_value = NULL;
  self->priv->values = NULL;
  self->priv->nvalues = 0;
  self->priv->valid_cache = FALSE;

  g_mutex_unlock (self->lock);
}

/**
 * gst_interpolation_control_source_get_all:
 * @self: the #GstInterpolationControlSource to get the list from
 *
 * Returns a read-only copy of the list of #GstTimedValue for the given property.
 * Free the list after done with it.
 *
 * Returns: a copy of the list, or %NULL if the property isn't handled by the controller
 */
GList *
gst_interpolation_control_source_get_all (GstInterpolationControlSource * self)
{
  GList *res = NULL;

  g_return_val_if_fail (GST_IS_INTERPOLATION_CONTROL_SOURCE (self), NULL);

  g_mutex_lock (self->lock);
  if (self->priv->values)
    res = g_list_copy (self->priv->values);
  g_mutex_unlock (self->lock);

  return res;
}

/**
 * gst_interpolation_control_source_get_count:
 * @self: the #GstInterpolationControlSource to get the number of values from
 *
 * Returns the number of control points that are set.
 *
 * Returns: the number of control points that are set.
 *
 */
gint
gst_interpolation_control_source_get_count (GstInterpolationControlSource *
    self)
{
  g_return_val_if_fail (GST_IS_INTERPOLATION_CONTROL_SOURCE (self), 0);
  return self->priv->nvalues;
}

static void
gst_interpolation_control_source_init (GstInterpolationControlSource * self)
{
  self->lock = g_mutex_new ();
  self->priv =
      G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_INTERPOLATION_CONTROL_SOURCE,
      GstInterpolationControlSourcePrivate);
  self->priv->interpolation_mode = GST_INTERPOLATE_NONE;
}

static void
gst_interpolation_control_source_finalize (GObject * obj)
{
  GstInterpolationControlSource *self = GST_INTERPOLATION_CONTROL_SOURCE (obj);

  g_mutex_lock (self->lock);
  gst_interpolation_control_source_reset (self);
  g_mutex_unlock (self->lock);
  g_mutex_free (self->lock);
  G_OBJECT_CLASS (parent_class)->finalize (obj);
}

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

static void
gst_interpolation_control_source_class_init (GstInterpolationControlSourceClass
    * 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 (GstInterpolationControlSourcePrivate));

  gobject_class->finalize = gst_interpolation_control_source_finalize;
  gobject_class->dispose = gst_interpolation_control_source_dispose;
  csource_class->bind = gst_interpolation_control_source_bind;
}