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; }