CoglPipeline *
cogl_gst_video_sink_get_pipeline (CoglGstVideoSink *vt)
{
CoglGstVideoSinkPrivate *priv;
g_return_val_if_fail (COGL_GST_IS_VIDEO_SINK (vt), NULL);
priv = vt->priv;
if (priv->pipeline == NULL)
{
priv->pipeline = cogl_pipeline_new (priv->ctx);
cogl_gst_video_sink_setup_pipeline (vt, priv->pipeline);
cogl_gst_video_sink_attach_frame (vt, priv->pipeline);
priv->frame_dirty = FALSE;
}
else if (priv->frame_dirty)
{
CoglPipeline *pipeline = cogl_pipeline_copy (priv->pipeline);
cogl_object_unref (priv->pipeline);
priv->pipeline = pipeline;
cogl_gst_video_sink_attach_frame (vt, pipeline);
priv->frame_dirty = FALSE;
}
return priv->pipeline;
}
static CoglGstVideoSink *
find_cogl_gst_video_sink (GstElement *element)
{
GstElement *sink_element = NULL;
GstIterator *iterator;
GstElement *iterator_value;
GValue value;
if (!GST_IS_BIN (element))
return NULL;
iterator = gst_bin_iterate_recurse (GST_BIN (element));
g_value_init (&value, GST_TYPE_ELEMENT);
while (gst_iterator_next (iterator, &value) == GST_ITERATOR_OK)
{
iterator_value = g_value_get_object (&value);
g_value_reset (&value);
if (COGL_GST_IS_VIDEO_SINK (iterator_value))
{
sink_element = iterator_value;
break;
}
}
g_value_unset (&value);
gst_iterator_free (iterator);
return COGL_GST_VIDEO_SINK (sink_element);
}
void
cogl_gst_video_sink_setup_pipeline (CoglGstVideoSink *sink,
CoglPipeline *pipeline)
{
g_return_if_fail (COGL_GST_IS_VIDEO_SINK (sink));
if (sink->priv->renderer)
sink->priv->renderer->setup_pipeline (sink, pipeline);
}
float
cogl_gst_video_sink_get_height_for_width (CoglGstVideoSink *vt,
float width)
{
float aspect;
g_return_val_if_fail (COGL_GST_IS_VIDEO_SINK (vt), 0.);
aspect = cogl_gst_video_sink_get_aspect (vt);
return width / aspect;
}
float
cogl_gst_video_sink_get_aspect (CoglGstVideoSink *vt)
{
GstVideoInfo *info;
g_return_val_if_fail (COGL_GST_IS_VIDEO_SINK (vt), 0.);
info = &vt->priv->info;
return ((float)info->width * (float)info->par_n) /
((float)info->height * (float)info->par_d);
}
void
cogl_gst_video_sink_set_default_sample (CoglGstVideoSink *sink,
CoglBool default_sample)
{
g_return_if_fail (COGL_GST_IS_VIDEO_SINK (sink));
if (default_sample != sink->priv->default_sample)
{
sink->priv->default_sample = default_sample;
dirty_default_pipeline (sink);
}
}
void
cogl_gst_video_sink_set_first_layer (CoglGstVideoSink *sink,
int first_layer)
{
g_return_if_fail (COGL_GST_IS_VIDEO_SINK (sink));
if (first_layer != sink->priv->custom_start)
{
sink->priv->custom_start = first_layer;
dirty_default_pipeline (sink);
if (sink->priv->renderer)
sink->priv->free_layer = (sink->priv->custom_start +
sink->priv->renderer->n_layers);
}
}
void
cogl_gst_video_sink_fit_size (CoglGstVideoSink *vt,
const CoglGstRectangle *available,
CoglGstRectangle *output)
{
g_return_if_fail (COGL_GST_IS_VIDEO_SINK (vt));
g_return_if_fail (available != NULL);
g_return_if_fail (output != NULL);
if (available->height == 0.0f)
{
output->x = available->x;
output->y = available->y;
output->width = output->height = 0;
}
else
{
float available_aspect = available->width / available->height;
float video_aspect = cogl_gst_video_sink_get_aspect (vt);
if (video_aspect > available_aspect)
{
output->width = available->width;
output->height = available->width / video_aspect;
output->x = available->x;
output->y = available->y + (available->height - output->height) / 2;
}
else
{
output->width = available->height * video_aspect;
output->height = available->height;
output->x = available->x + (available->width - output->width) / 2;
output->y = available->y;
}
}
}