static void gst_imx_compositor_pad_update_canvas(GstImxCompositorPad *compositor_pad, GstImxRegion const *source_region)
{
GstImxCompositor *compositor;
GstVideoInfo *info = &(GST_IMXBP_VIDEO_AGGREGATOR_PAD(compositor_pad)->info);
/* Catch redundant calls */
if (!(compositor_pad->canvas_needs_update))
return;
compositor = GST_IMX_COMPOSITOR(gst_pad_get_parent_element(GST_PAD(compositor_pad)));
/* (Re)compute the outer region */
gst_imx_compositor_pad_compute_outer_region(compositor_pad);
/* (Re)computer the inner region */
gst_imx_canvas_calculate_inner_region(&(compositor_pad->canvas), info);
/* Next, clip the canvas against the overall region,
* which describes the output frame's size
* This way, it is ensured that only the parts that are "within"
* the output frame are blit */
gst_imx_canvas_clip(
&(compositor_pad->canvas),
&(compositor->overall_region),
info,
source_region,
&(compositor_pad->source_subset)
);
/* Canvas updated, mark it as such */
compositor_pad->canvas_needs_update = FALSE;
gst_object_unref(GST_OBJECT(compositor));
}
static gboolean gst_imx_blitter_video_transform_set_caps(GstBaseTransform *transform, GstCaps *in, GstCaps *out)
{
gboolean inout_info_equal;
GstVideoInfo in_info, out_info;
GstImxBlitterVideoTransform *blitter_video_transform = GST_IMX_BLITTER_VIDEO_TRANSFORM(transform);
GstImxBlitterVideoTransformClass *klass = GST_IMX_BLITTER_VIDEO_TRANSFORM_CLASS(G_OBJECT_GET_CLASS(transform));
GstImxCanvas *canvas = &(blitter_video_transform->canvas);
GstImxRegion source_subset;
g_assert(klass->are_video_infos_equal != NULL);
g_assert(blitter_video_transform->blitter != NULL);
if (!gst_video_info_from_caps(&in_info, in) || !gst_video_info_from_caps(&out_info, out))
{
GST_ERROR_OBJECT(transform, "caps are invalid");
blitter_video_transform->inout_info_set = FALSE;
return FALSE;
}
inout_info_equal = klass->are_video_infos_equal(blitter_video_transform, &in_info, &out_info);
if (inout_info_equal)
GST_DEBUG_OBJECT(transform, "input and output caps are equal");
else
GST_DEBUG_OBJECT(transform, "input and output caps are not equal: input: %" GST_PTR_FORMAT " output: %" GST_PTR_FORMAT, (gpointer)in, (gpointer)out);
gst_imx_blitter_set_input_video_info(blitter_video_transform->blitter, &in_info);
gst_imx_blitter_set_output_video_info(blitter_video_transform->blitter, &out_info);
/* setting new caps changes the canvas, so recalculate it
* the recalculation here is done without any input cropping, so set
* last_frame_with_cropdata to FALSE, in case subsequent frames do
* contain crop metadata */
blitter_video_transform->last_frame_with_cropdata = FALSE;
/* the canvas always encompasses the entire output frame */
canvas->outer_region.x1 = 0;
canvas->outer_region.y1 = 0;
canvas->outer_region.x2 = GST_VIDEO_INFO_WIDTH(&out_info);
canvas->outer_region.y2 = GST_VIDEO_INFO_HEIGHT(&out_info);
gst_imx_canvas_calculate_inner_region(canvas, &in_info);
gst_imx_canvas_clip(canvas, &(canvas->outer_region), &in_info, NULL, &source_subset);
gst_imx_blitter_set_input_region(blitter_video_transform->blitter, &source_subset);
gst_imx_blitter_set_output_canvas(blitter_video_transform->blitter, canvas);
blitter_video_transform->input_video_info = in_info;
blitter_video_transform->output_video_info = out_info;
blitter_video_transform->inout_info_equal = inout_info_equal;
blitter_video_transform->inout_info_set = TRUE;
return TRUE;
}
static void gst_imx_blitter_video_sink_update_canvas(GstImxBlitterVideoSink *blitter_video_sink, GstImxRegion const *source_region)
{
/* must be called with lock held */
GstImxRegion *outer_region = &(blitter_video_sink->canvas.outer_region);
GstImxRegion source_subset;
/* Define the outer region */
if ((blitter_video_sink->window_width == 0) || (blitter_video_sink->window_height == 0))
{
/* If either window_width or window_height is 0, then just use the
* entire framebuffer as the outer region */
*outer_region = blitter_video_sink->framebuffer_region;
}
else
{
/* Use the defined window as the outer region */
outer_region->x1 = blitter_video_sink->window_x_coord;
outer_region->y1 = blitter_video_sink->window_y_coord;
outer_region->x2 = blitter_video_sink->window_x_coord + blitter_video_sink->window_width;
outer_region->y2 = blitter_video_sink->window_y_coord + blitter_video_sink->window_height;
}
gst_imx_canvas_calculate_inner_region(&(blitter_video_sink->canvas), &(blitter_video_sink->input_video_info));
gst_imx_canvas_clip(
&(blitter_video_sink->canvas),
&(blitter_video_sink->framebuffer_region),
&(blitter_video_sink->input_video_info),
source_region,
&source_subset
);
gst_imx_blitter_set_input_region(blitter_video_sink->blitter, &source_subset);
gst_imx_blitter_set_output_canvas(blitter_video_sink->blitter, &(blitter_video_sink->canvas));
blitter_video_sink->canvas_needs_update = FALSE;
}
