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filter: allow specification of render target regions.

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Add support for rendering the source surface to a particular region within
the supplied target surface. The default background color is black.
This commit is contained in:
Gwenole Beauchesne 2013-08-27 18:06:10 +02:00
parent 771071a4e5
commit 71e5fd536f
3 changed files with 53 additions and 4 deletions
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1
docs/reference/libs/libs-sections.txt
View file

@ -387,6 +387,7 @@ gst_vaapi_filter_get_formats
gst_vaapi_filter_set_operation
gst_vaapi_filter_set_format
gst_vaapi_filter_set_cropping_rectangle
gst_vaapi_filter_set_target_rectangle
gst_vaapi_filter_set_denoising_level
gst_vaapi_filter_set_sharpening_level
gst_vaapi_filter_set_hue

52
gst-libs/gst/vaapi/gstvaapifilter.c
View file

@ -64,7 +64,9 @@ struct _GstVaapiFilter {
GstVideoFormat format;
GArray *formats;
GstVaapiRectangle crop_rect;
GstVaapiRectangle target_rect;
guint use_crop_rect : 1;
guint use_target_rect : 1;
};
/* ------------------------------------------------------------------------- */
@ -1178,6 +1180,7 @@ gst_vaapi_filter_process_unlocked(GstVaapiFilter *filter,
if (!ensure_operations(filter))
return GST_VAAPI_FILTER_STATUS_ERROR_ALLOCATION_FAILED;
/* Build surface region (source) */
if (filter->use_crop_rect) {
const GstVaapiRectangle * const crop_rect = &filter->crop_rect;
@ -1199,10 +1202,27 @@ gst_vaapi_filter_process_unlocked(GstVaapiFilter *filter,
src_rect.height = GST_VAAPI_SURFACE_HEIGHT(src_surface);
}
dst_rect.x = 0;
dst_rect.y = 0;
dst_rect.width = GST_VAAPI_SURFACE_WIDTH(dst_surface);
dst_rect.height = GST_VAAPI_SURFACE_HEIGHT(dst_surface);
/* Build output region (target) */
if (filter->use_target_rect) {
const GstVaapiRectangle * const target_rect = &filter->target_rect;
if ((target_rect->x + target_rect->width >
GST_VAAPI_SURFACE_WIDTH(dst_surface)) ||
(target_rect->y + target_rect->height >
GST_VAAPI_SURFACE_HEIGHT(dst_surface)))
goto error;
dst_rect.x = target_rect->x;
dst_rect.y = target_rect->y;
dst_rect.width = target_rect->width;
dst_rect.height = target_rect->height;
}
else {
dst_rect.x = 0;
dst_rect.y = 0;
dst_rect.width = GST_VAAPI_SURFACE_WIDTH(dst_surface);
dst_rect.height = GST_VAAPI_SURFACE_HEIGHT(dst_surface);
}
for (i = 0, num_filters = 0; i < filter->operations->len; i++) {
GstVaapiFilterOpData * const op_data =
@ -1351,6 +1371,30 @@ gst_vaapi_filter_set_cropping_rectangle(GstVaapiFilter *filter,
return TRUE;
}
/**
* gst_vaapi_filter_set_target_rectangle:
* @filter: a #GstVaapiFilter
* @rect: the target render region
*
* Sets the region within the target surface where the source surface
* would be rendered. i.e. where the hardware accelerator would emit
* the outcome of video processing. If @rect is %NULL, the whole
* source surface will be used.
*
* Return value: %TRUE if the operation is supported, %FALSE otherwise.
*/
gboolean
gst_vaapi_filter_set_target_rectangle(GstVaapiFilter *filter,
const GstVaapiRectangle *rect)
{
g_return_val_if_fail(filter != NULL, FALSE);
filter->use_target_rect = rect != NULL;
if (filter->use_target_rect)
filter->target_rect = *rect;
return TRUE;
}
/**
* gst_vaapi_filter_set_denoising_level:
* @filter: a #GstVaapiFilter

4
gst-libs/gst/vaapi/gstvaapifilter.h
View file

@ -167,6 +167,10 @@ gboolean
gst_vaapi_filter_set_cropping_rectangle(GstVaapiFilter *filter,
const GstVaapiRectangle *rect);
gboolean
gst_vaapi_filter_set_target_rectangle(GstVaapiFilter *filter,
const GstVaapiRectangle *rect);
gboolean
gst_vaapi_filter_set_denoising_level(GstVaapiFilter *filter, gfloat level);