void
gtk_gst_base_widget_set_buffer (GtkGstBaseWidget * widget, GstBuffer * buffer)
{
/* As we have no type, this is better then no check */
g_return_if_fail (GTK_IS_WIDGET (widget));
GTK_GST_BASE_WIDGET_LOCK (widget);
gst_buffer_replace (&widget->pending_buffer, buffer);
if (!widget->draw_id) {
widget->draw_id = g_idle_add_full (G_PRIORITY_DEFAULT,
(GSourceFunc) _queue_draw, widget, NULL);
}
GTK_GST_BASE_WIDGET_UNLOCK (widget);
}
gboolean
gtk_gst_base_widget_set_format (GtkGstBaseWidget * widget,
GstVideoInfo * v_info)
{
GTK_GST_BASE_WIDGET_LOCK (widget);
if (gst_video_info_is_equal (&widget->v_info, v_info)) {
GTK_GST_BASE_WIDGET_UNLOCK (widget);
return TRUE;
}
if (!_calculate_par (widget, v_info)) {
GTK_GST_BASE_WIDGET_UNLOCK (widget);
return FALSE;
}
widget->pending_resize = TRUE;
widget->pending_v_info = *v_info;
GTK_GST_BASE_WIDGET_UNLOCK (widget);
return TRUE;
}
static gboolean
_queue_draw (GtkGstBaseWidget * widget)
{
GTK_GST_BASE_WIDGET_LOCK (widget);
widget->draw_id = 0;
if (widget->pending_resize) {
widget->pending_resize = FALSE;
widget->v_info = widget->pending_v_info;
widget->negotiated = TRUE;
_apply_par (widget);
gtk_widget_queue_resize (GTK_WIDGET (widget));
} else {
gtk_widget_queue_draw (GTK_WIDGET (widget));
}
GTK_GST_BASE_WIDGET_UNLOCK (widget);
return G_SOURCE_REMOVE;
}
static gboolean
gtk_gst_widget_draw (GtkWidget * widget, cairo_t * cr)
{
GtkGstBaseWidget *gst_widget = (GtkGstBaseWidget *) widget;
guint widget_width, widget_height;
cairo_surface_t *surface;
GstVideoFrame frame;
widget_width = gtk_widget_get_allocated_width (widget);
widget_height = gtk_widget_get_allocated_height (widget);
GTK_GST_BASE_WIDGET_LOCK (gst_widget);
/* There is not much to optimize in term of redisplay, so simply swap the
* pending_buffer with the active buffer */
if (gst_widget->pending_buffer) {
if (gst_widget->buffer)
gst_buffer_unref (gst_widget->buffer);
gst_widget->buffer = gst_widget->pending_buffer;
gst_widget->pending_buffer = NULL;
}
/* failed to map the video frame */
if (gst_widget->negotiated && gst_widget->buffer
&& gst_video_frame_map (&frame, &gst_widget->v_info,
gst_widget->buffer, GST_MAP_READ)) {
gdouble scale_x = (gdouble) widget_width / gst_widget->display_width;
gdouble scale_y = (gdouble) widget_height / gst_widget->display_height;
GstVideoRectangle result;
cairo_format_t format;
gst_widget->v_info = frame.info;
if (frame.info.finfo->format == GST_VIDEO_FORMAT_ARGB ||
frame.info.finfo->format == GST_VIDEO_FORMAT_BGRA) {
format = CAIRO_FORMAT_ARGB32;
} else {
format = CAIRO_FORMAT_RGB24;
}
surface = cairo_image_surface_create_for_data (frame.data[0],
format, frame.info.width, frame.info.height, frame.info.stride[0]);
if (gst_widget->force_aspect_ratio) {
GstVideoRectangle src, dst;
src.x = 0;
src.y = 0;
src.w = gst_widget->display_width;
src.h = gst_widget->display_height;
dst.x = 0;
dst.y = 0;
dst.w = widget_width;
dst.h = widget_height;
gst_video_sink_center_rect (src, dst, &result, TRUE);
scale_x = scale_y = MIN (scale_x, scale_y);
} else {
result.x = 0;
result.y = 0;
result.w = widget_width;
result.h = widget_height;
}
if (gst_widget->ignore_alpha) {
GdkRGBA color = { 0.0, 0.0, 0.0, 1.0 };
gdk_cairo_set_source_rgba (cr, &color);
if (result.x > 0) {
cairo_rectangle (cr, 0, 0, result.x, widget_height);
cairo_fill (cr);
}
if (result.y > 0) {
cairo_rectangle (cr, 0, 0, widget_width, result.y);
cairo_fill (cr);
}
if (result.w < widget_width) {
cairo_rectangle (cr, result.x + result.w, 0, widget_width - result.w,
widget_height);
cairo_fill (cr);
}
if (result.h < widget_height) {
cairo_rectangle (cr, 0, result.y + result.h, widget_width,
widget_height - result.h);
cairo_fill (cr);
}
}
scale_x *= (gdouble) gst_widget->display_width / (gdouble) frame.info.width;
scale_y *=
(gdouble) gst_widget->display_height / (gdouble) frame.info.height;
cairo_translate (cr, result.x, result.y);
cairo_scale (cr, scale_x, scale_y);
cairo_rectangle (cr, 0, 0, result.w, result.h);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_paint (cr);
cairo_surface_destroy (surface);
gst_video_frame_unmap (&frame);
} else {
GdkRGBA color;
if (gst_widget->ignore_alpha) {
color.red = color.blue = color.green = 0.0;
color.alpha = 1.0;
} else {
gtk_style_context_get_color (gtk_widget_get_style_context (widget),
GTK_STATE_FLAG_NORMAL, &color);
}
gdk_cairo_set_source_rgba (cr, &color);
cairo_rectangle (cr, 0, 0, widget_width, widget_height);
cairo_fill (cr);
}
GTK_GST_BASE_WIDGET_UNLOCK (gst_widget);
return FALSE;
}