static void gst_imx_blitter_video_sink_close_framebuffer_device(GstImxBlitterVideoSink *blitter_video_sink)
{
/* must be called with lock held */
g_assert(blitter_video_sink != NULL);
if (blitter_video_sink->framebuffer_fd == -1)
return;
GST_INFO_OBJECT(blitter_video_sink, "closing framebuffer %s with FD %d", blitter_video_sink->framebuffer_name, blitter_video_sink->framebuffer_fd);
if (blitter_video_sink->blitter != NULL)
{
/* switch back to the first page if vsync was used */
if (blitter_video_sink->use_vsync)
{
GST_DEBUG_OBJECT(blitter_video_sink, "cleaning up page flipping by flipping to page 0");
gst_imx_blitter_video_sink_select_fb_page(blitter_video_sink, 0);
gst_imx_blitter_video_sink_flip_to_selected_fb_page(blitter_video_sink);
if (blitter_video_sink->original_fb_virt_height != 0)
gst_imx_blitter_video_sink_restore_original_fb_config(blitter_video_sink);
}
gst_imx_blitter_flush(blitter_video_sink->blitter);
}
gst_buffer_unref(blitter_video_sink->framebuffer);
close(blitter_video_sink->framebuffer_fd);
blitter_video_sink->framebuffer = NULL;
blitter_video_sink->framebuffer_fd = -1;
}
static void gst_imx_blitter_dispose(GObject *object)
{
GstImxBlitter *blitter = GST_IMX_BLITTER(object);
gst_imx_blitter_flush(blitter);
if (blitter->dma_bufferpool != NULL)
{
gst_object_unref(GST_OBJECT(blitter->dma_bufferpool));
blitter->dma_bufferpool = NULL;
}
G_OBJECT_CLASS(gst_imx_blitter_parent_class)->dispose(object);
}
static gboolean gst_imx_blitter_video_sink_event(GstBaseSink *sink, GstEvent *event)
{
GstImxBlitterVideoSink *blitter_video_sink = GST_IMX_BLITTER_VIDEO_SINK(sink);
switch (GST_EVENT_TYPE(event))
{
case GST_EVENT_FLUSH_STOP:
{
GST_IMX_BLITTER_VIDEO_SINK_LOCK(blitter_video_sink);
if (blitter_video_sink->blitter != NULL)
gst_imx_blitter_flush(blitter_video_sink->blitter);
GST_IMX_BLITTER_VIDEO_SINK_UNLOCK(blitter_video_sink);
break;
}
default:
break;
}
return GST_BASE_SINK_CLASS(gst_imx_blitter_video_sink_parent_class)->event(sink, event);
}
static gboolean gst_imx_blitter_video_transform_sink_event(GstBaseTransform *transform, GstEvent *event)
{
GstImxBlitterVideoTransform *blitter_video_transform = GST_IMX_BLITTER_VIDEO_TRANSFORM(transform);
switch (GST_EVENT_TYPE(event))
{
case GST_EVENT_FLUSH_STOP:
{
GST_IMX_BLITTER_VIDEO_TRANSFORM_LOCK(blitter_video_transform);
if (blitter_video_transform->blitter != NULL)
gst_imx_blitter_flush(blitter_video_transform->blitter);
GST_IMX_BLITTER_VIDEO_TRANSFORM_UNLOCK(blitter_video_transform);
break;
}
default:
break;
}
return GST_BASE_TRANSFORM_CLASS(gst_imx_blitter_video_transform_parent_class)->sink_event(transform, event);
}
static GstFlowReturn gst_imx_blitter_video_sink_show_frame(GstVideoSink *video_sink, GstBuffer *buf)
{
GstImxBlitterVideoSink *blitter_video_sink = GST_IMX_BLITTER_VIDEO_SINK_CAST(video_sink);
GstVideoCropMeta *video_crop_meta;
GST_IMX_BLITTER_VIDEO_SINK_LOCK(blitter_video_sink);
if (blitter_video_sink->input_crop && ((video_crop_meta = gst_buffer_get_video_crop_meta(buf)) != NULL))
{
/* Crop metadata present. Reconfigure canvas. */
GstImxRegion source_region;
source_region.x1 = video_crop_meta->x;
source_region.y1 = video_crop_meta->y;
source_region.x2 = video_crop_meta->x + video_crop_meta->width;
source_region.y2 = video_crop_meta->y + video_crop_meta->height;
/* Make sure the source region does not exceed valid bounds */
source_region.x1 = MAX(0, source_region.x1);
source_region.y1 = MAX(0, source_region.y1);
source_region.x2 = MIN(GST_VIDEO_INFO_WIDTH(&(blitter_video_sink->input_video_info)), source_region.x2);
source_region.y2 = MIN(GST_VIDEO_INFO_HEIGHT(&(blitter_video_sink->input_video_info)), source_region.y2);
GST_LOG_OBJECT(blitter_video_sink, "retrieved crop rectangle %" GST_IMX_REGION_FORMAT, GST_IMX_REGION_ARGS(&source_region));
/* Canvas needs to be updated if either one of these applies:
* - the current frame has crop metadata, the last one didn't
* - the new crop rectangle and the last are different */
if (!(blitter_video_sink->last_frame_with_cropdata) || !gst_imx_region_equal(&source_region, &(blitter_video_sink->last_source_region)))
{
GST_LOG_OBJECT(blitter_video_sink, "using new crop rectangle %" GST_IMX_REGION_FORMAT, GST_IMX_REGION_ARGS(&source_region));
blitter_video_sink->last_source_region = source_region;
blitter_video_sink->canvas_needs_update = TRUE;
}
blitter_video_sink->last_frame_with_cropdata = TRUE;
/* Update canvas and input region if necessary */
if (blitter_video_sink->canvas_needs_update)
gst_imx_blitter_video_sink_update_canvas(blitter_video_sink, &(blitter_video_sink->last_source_region));
}
else
{
/* Force an update if this frame has no crop metadata but the last one did */
if (blitter_video_sink->last_frame_with_cropdata)
blitter_video_sink->canvas_needs_update = TRUE;
blitter_video_sink->last_frame_with_cropdata = FALSE;
/* Update canvas and input region if necessary */
if (blitter_video_sink->canvas_needs_update)
gst_imx_blitter_video_sink_update_canvas(blitter_video_sink, NULL);
}
if (blitter_video_sink->canvas.visibility_mask == 0)
{
/* Visibility mask 0 -> nothing to blit */
GST_IMX_BLITTER_VIDEO_SINK_UNLOCK(blitter_video_sink);
return GST_FLOW_OK;
}
gst_imx_blitter_set_input_frame(blitter_video_sink->blitter, buf);
/* If using vsync, blit to the backbuffer, and flip
* The flipping is done by scrolling in Y direction
* by the same number of rows as there are on screen
* The scrolling is implicitely vsync'ed */
if (blitter_video_sink->use_vsync)
{
/* Select which page to write/blit to */
++blitter_video_sink->old_fb_page;
blitter_video_sink->old_fb_page %= 3;
gst_imx_blitter_video_sink_select_fb_page(blitter_video_sink, blitter_video_sink->old_fb_page);
/* The actual blitting */
gst_imx_blitter_blit(blitter_video_sink->blitter, 255);
/* Flush the blitter to make sure it does not use any cached output
* information (for example, the physical address of the previously
* selected fb page) */
gst_imx_blitter_flush(blitter_video_sink->blitter);
/* Move the current_fb_page index to the next page. See the explanation
* at the set_property PROP_USE_VSYNC block for the reason why three
* pages are expected instead of 2. */
blitter_video_sink->current_fb_page++;
blitter_video_sink->current_fb_page %= 3;
/* Flip pages now */
gst_imx_blitter_video_sink_flip_to_selected_fb_page(blitter_video_sink);
}
else
{
gst_imx_blitter_blit(blitter_video_sink->blitter, 255);
}
GST_IMX_BLITTER_VIDEO_SINK_UNLOCK(blitter_video_sink);
return GST_FLOW_OK;
}
