/**
* gst_vaapi_subpicture_new_from_overlay_rectangle:
* @display: a #GstVaapiDisplay
* @rect: a #GstVideoOverlayRectangle
*
* Helper function that creates a new #GstVaapiSubpicture from a
* #GstVideoOverlayRectangle. A new #GstVaapiImage is also created
* along the way and attached to the resulting subpicture. The
* subpicture holds a unique reference to the underlying image.
*
* Return value: the newly allocated #GstVaapiSubpicture object
*/
GstVaapiSubpicture *
gst_vaapi_subpicture_new_from_overlay_rectangle (GstVaapiDisplay * display,
GstVideoOverlayRectangle * rect)
{
GstVaapiSubpicture *subpicture;
GstVideoFormat format;
GstVaapiImage *image;
GstVaapiImageRaw raw_image;
GstBuffer *buffer;
guint8 *data;
gfloat global_alpha;
guint width, height, stride;
guint hw_flags, flags;
GstVideoMeta *vmeta;
GstMapInfo map_info;
g_return_val_if_fail (GST_IS_VIDEO_OVERLAY_RECTANGLE (rect), NULL);
/* XXX: use gst_vaapi_image_format_from_video() */
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
format = GST_VIDEO_FORMAT_BGRA;
#else
format = GST_VIDEO_FORMAT_ARGB;
#endif
if (!gst_vaapi_display_has_subpicture_format (display, format, &hw_flags))
return NULL;
flags =
hw_flags &
from_GstVideoOverlayFormatFlags (gst_video_overlay_rectangle_get_flags
(rect));
buffer = gst_video_overlay_rectangle_get_pixels_unscaled_argb (rect,
to_GstVideoOverlayFormatFlags (flags));
if (!buffer)
return NULL;
vmeta = gst_buffer_get_video_meta (buffer);
if (!vmeta)
return NULL;
width = vmeta->width;
height = vmeta->height;
if (!gst_video_meta_map (vmeta, 0, &map_info, (gpointer *) & data,
(gint *) & stride, GST_MAP_READ))
return NULL;
image = gst_vaapi_image_new (display, format, width, height);
if (!image)
return NULL;
raw_image.format = format;
raw_image.width = width;
raw_image.height = height;
raw_image.num_planes = 1;
raw_image.pixels[0] = data;
raw_image.stride[0] = stride;
if (!gst_vaapi_image_update_from_raw (image, &raw_image, NULL)) {
GST_WARNING ("could not update VA image with subtitle data");
gst_vaapi_object_unref (image);
return NULL;
}
subpicture = gst_vaapi_subpicture_new (image, flags);
gst_vaapi_object_unref (image);
gst_video_meta_unmap (vmeta, 0, &map_info);
if (!subpicture)
return NULL;
if (flags & GST_VAAPI_SUBPICTURE_FLAG_GLOBAL_ALPHA) {
global_alpha = gst_video_overlay_rectangle_get_global_alpha (rect);
if (!gst_vaapi_subpicture_set_global_alpha (subpicture, global_alpha))
return NULL;
}
return subpicture;
}
/**
* gst_video_frame_map_id:
* @frame: pointer to #GstVideoFrame
* @info: a #GstVideoInfo
* @buffer: the buffer to map
* @id: the frame id to map
* @flags: #GstMapFlags
*
* Use @info and @buffer to fill in the values of @frame with the video frame
* information of frame @id.
*
* When @id is -1, the default frame is mapped. When @id != -1, this function
* will return %FALSE when there is no GstVideoMeta with that id.
*
* All video planes of @buffer will be mapped and the pointers will be set in
* @frame->data.
*
* Returns: %TRUE on success.
*/
gboolean
gst_video_frame_map_id (GstVideoFrame * frame, GstVideoInfo * info,
GstBuffer * buffer, gint id, GstMapFlags flags)
{
GstVideoMeta *meta;
gint i;
g_return_val_if_fail (frame != NULL, FALSE);
g_return_val_if_fail (info != NULL, FALSE);
g_return_val_if_fail (GST_IS_BUFFER (buffer), FALSE);
if (id == -1)
meta = gst_buffer_get_video_meta (buffer);
else
meta = gst_buffer_get_video_meta_id (buffer, id);
/* copy the info */
frame->info = *info;
if (meta) {
frame->info.finfo = gst_video_format_get_info (meta->format);
frame->info.width = meta->width;
frame->info.height = meta->height;
frame->id = meta->id;
frame->flags = meta->flags;
for (i = 0; i < info->finfo->n_planes; i++)
if (!gst_video_meta_map (meta, i, &frame->map[i], &frame->data[i],
&frame->info.stride[i], flags))
goto frame_map_failed;
} else {
/* no metadata, we really need to have the metadata when the id is
* specified. */
if (id != -1)
goto no_metadata;
frame->id = id;
frame->flags = 0;
if (!gst_buffer_map (buffer, &frame->map[0], flags))
goto map_failed;
/* do some sanity checks */
if (frame->map[0].size < info->size)
goto invalid_size;
/* set up pointers */
for (i = 0; i < info->finfo->n_planes; i++) {
frame->data[i] = frame->map[0].data + info->offset[i];
}
}
frame->buffer = gst_buffer_ref (buffer);
frame->meta = meta;
/* buffer flags enhance the frame flags */
if (GST_VIDEO_INFO_IS_INTERLACED (info)) {
if (GST_BUFFER_FLAG_IS_SET (buffer, GST_VIDEO_BUFFER_FLAG_INTERLACED))
frame->flags |= GST_VIDEO_FRAME_FLAG_INTERLACED;
if (GST_BUFFER_FLAG_IS_SET (buffer, GST_VIDEO_BUFFER_FLAG_TFF))
frame->flags |= GST_VIDEO_FRAME_FLAG_TFF;
if (GST_BUFFER_FLAG_IS_SET (buffer, GST_VIDEO_BUFFER_FLAG_RFF))
frame->flags |= GST_VIDEO_FRAME_FLAG_RFF;
if (GST_BUFFER_FLAG_IS_SET (buffer, GST_VIDEO_BUFFER_FLAG_ONEFIELD))
frame->flags |= GST_VIDEO_FRAME_FLAG_ONEFIELD;
}
return TRUE;
/* ERRORS */
no_metadata:
{
GST_ERROR ("no GstVideoMeta for id %d", id);
return FALSE;
}
frame_map_failed:
{
GST_ERROR ("failed to map video frame plane %d", i);
while (--i >= 0)
gst_video_meta_unmap (meta, i, &frame->map[i]);
return FALSE;
}
map_failed:
{
GST_ERROR ("failed to map buffer");
return FALSE;
}
invalid_size:
{
GST_ERROR ("invalid buffer size %" G_GSIZE_FORMAT " < %" G_GSIZE_FORMAT,
frame->map[0].size, info->size);
gst_buffer_unmap (buffer, &frame->map[0]);
return FALSE;
}
}