gstreamer/subprojects/gstreamer-vaapi/gst-libs/gst/vaapi/gstvaapisubpicture.c

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/*
* gstvaapisubpicture.c - VA subpicture abstraction
*
* Copyright (C) 2010-2011 Splitted-Desktop Systems
* Author: Gwenole Beauchesne <gwenole.beauchesne@splitted-desktop.com>
* Copyright (C) 2011-2013 Intel Corporation
* Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
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*
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* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
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*/
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/**
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* SECTION:gstvaapisubpicture
* @short_description: VA subpicture abstraction
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*/
#include "sysdeps.h"
#include "gstvaapicompat.h"
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#include "gstvaapiutils.h"
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#include "gstvaapisubpicture.h"
#include "gstvaapiimage_priv.h"
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#define DEBUG 1
#include "gstvaapidebug.h"
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/**
* GstVaapiSubpicture:
*
* A VA subpicture wrapper
*/
struct _GstVaapiSubpicture
{
/*< private > */
GstMiniObject mini_object;
GstVaapiDisplay *display;
GstVaapiID object_id;
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GstVaapiImage *image;
guint flags;
gfloat global_alpha;
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};
static void
gst_vaapi_subpicture_free_image (GstVaapiSubpicture * subpicture)
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{
GstVaapiDisplay *const display = subpicture->display;
VASubpictureID subpicture_id;
VAStatus status;
subpicture_id = subpicture->object_id;
GST_DEBUG ("subpicture %" GST_VAAPI_ID_FORMAT,
GST_VAAPI_ID_ARGS (subpicture_id));
if (subpicture_id != VA_INVALID_ID) {
GST_VAAPI_DISPLAY_LOCK (display);
status = vaDestroySubpicture (GST_VAAPI_DISPLAY_VADISPLAY (display),
subpicture_id);
GST_VAAPI_DISPLAY_UNLOCK (display);
if (!vaapi_check_status (status, "vaDestroySubpicture()"))
GST_WARNING ("failed to destroy subpicture %" GST_VAAPI_ID_FORMAT,
GST_VAAPI_ID_ARGS (subpicture_id));
subpicture->object_id = VA_INVALID_ID;
}
if (subpicture->image)
gst_mini_object_replace ((GstMiniObject **) & subpicture->image, NULL);
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}
static void
gst_vaapi_subpicture_free (GstVaapiSubpicture * subpicture)
{
gst_vaapi_subpicture_free_image (subpicture);
gst_vaapi_display_replace (&subpicture->display, NULL);
g_free (subpicture);
}
GST_DEFINE_MINI_OBJECT_TYPE (GstVaapiSubpicture, gst_vaapi_subpicture);
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static gboolean
gst_vaapi_subpicture_bind_image (GstVaapiSubpicture * subpicture,
GstVaapiImage * image)
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{
GstVaapiDisplay *const display = subpicture->display;
VASubpictureID subpicture_id;
VAStatus status;
GST_VAAPI_DISPLAY_LOCK (display);
status = vaCreateSubpicture (GST_VAAPI_DISPLAY_VADISPLAY (display),
GST_VAAPI_IMAGE_ID (image), &subpicture_id);
GST_VAAPI_DISPLAY_UNLOCK (display);
if (!vaapi_check_status (status, "vaCreateSubpicture()"))
return FALSE;
GST_DEBUG ("subpicture %" GST_VAAPI_ID_FORMAT,
GST_VAAPI_ID_ARGS (subpicture_id));
subpicture->object_id = subpicture_id;
subpicture->image =
(GstVaapiImage *) gst_mini_object_ref (GST_MINI_OBJECT_CAST (image));
return TRUE;
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}
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/**
* gst_vaapi_subpicture_new:
* @image: a #GstVaapiImage
* @flags: #GstVaapiSubpictureFlags, or zero
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*
* Creates a new #GstVaapiSubpicture with @image as source pixels. The
* newly created object holds a reference on @image.
*
* Return value: the newly allocated #GstVaapiSubpicture object
*/
GstVaapiSubpicture *
gst_vaapi_subpicture_new (GstVaapiImage * image, guint flags)
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{
GstVaapiSubpicture *subpicture;
GstVaapiDisplay *display;
GstVideoFormat format;
guint va_flags;
g_return_val_if_fail (image != NULL, NULL);
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GST_DEBUG ("create from image %" GST_VAAPI_ID_FORMAT,
GST_VAAPI_ID_ARGS (GST_VAAPI_IMAGE_ID (image)));
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display = GST_VAAPI_IMAGE_DISPLAY (image);
format = GST_VAAPI_IMAGE_FORMAT (image);
if (!gst_vaapi_display_has_subpicture_format (display, format, &va_flags))
return NULL;
if (flags & ~va_flags)
return NULL;
subpicture = g_new (GstVaapiSubpicture, 1);
if (!subpicture)
return NULL;
gst_mini_object_init (GST_MINI_OBJECT_CAST (subpicture), 0,
GST_TYPE_VAAPI_SUBPICTURE, NULL, NULL,
(GstMiniObjectFreeFunction) gst_vaapi_subpicture_free);
subpicture->display = gst_object_ref (display);
subpicture->object_id = VA_INVALID_ID;
subpicture->flags = flags;
subpicture->global_alpha = 1.0f;
if (!gst_vaapi_subpicture_bind_image (subpicture, image))
goto error;
return subpicture;
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/* ERRORS */
error:
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{
gst_vaapi_subpicture_unref (subpicture);
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return NULL;
}
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}
/**
* 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);
format = GST_VIDEO_OVERLAY_COMPOSITION_FORMAT_RGB;
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_image_unref (image);
return NULL;
}
subpicture = gst_vaapi_subpicture_new (image, flags);
gst_vaapi_image_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_vaapi_subpicture_get_id:
* @subpicture: a #GstVaapiSubpicture
*
* Returns the underlying VASubpictureID of the @subpicture.
*
* Return value: the underlying VA subpicture id
*/
GstVaapiID
gst_vaapi_subpicture_get_id (GstVaapiSubpicture * subpicture)
{
g_return_val_if_fail (subpicture != NULL, VA_INVALID_ID);
return subpicture->object_id;
}
/**
* gst_vaapi_subpicture_get_flags:
* @subpicture: a #GstVaapiSubpicture
*
* Returns the @subpicture flags.
*
* Return value: the @subpicture flags
*/
guint
gst_vaapi_subpicture_get_flags (GstVaapiSubpicture * subpicture)
{
g_return_val_if_fail (subpicture != NULL, 0);
return subpicture->flags;
}
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/**
* gst_vaapi_subpicture_get_image:
* @subpicture: a #GstVaapiSubpicture
*
* Returns the #GstVaapiImage this @subpicture is bound to.
*
* Return value: the #GstVaapiImage this @subpicture is bound to
*/
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GstVaapiImage *
gst_vaapi_subpicture_get_image (GstVaapiSubpicture * subpicture)
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{
g_return_val_if_fail (subpicture != NULL, NULL);
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return subpicture->image;
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}
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/**
* gst_vaapi_subpicture_set_image:
* @subpicture: a #GstVaapiSubpicture
* @image: a #GstVaapiImage
*
* Binds a new #GstVaapiImage to the @subpicture. The reference to the
* previous image is released and a new one is acquired on @image.
*
* Return value: %TRUE on success
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*/
gboolean
gst_vaapi_subpicture_set_image (GstVaapiSubpicture * subpicture,
GstVaapiImage * image)
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{
g_return_val_if_fail (subpicture != NULL, FALSE);
g_return_val_if_fail (image != NULL, FALSE);
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gst_vaapi_subpicture_free_image (subpicture);
return gst_vaapi_subpicture_bind_image (subpicture, image);
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}
/**
* gst_vaapi_subpicture_get_global_alpha:
* @subpicture: a #GstVaapiSubpicture
*
* Returns the value of global_alpha, set for this @subpicture.
*
* Return value: the global_alpha value of this @subpicture
*/
gfloat
gst_vaapi_subpicture_get_global_alpha (GstVaapiSubpicture * subpicture)
{
g_return_val_if_fail (subpicture != NULL, 1.0);
return subpicture->global_alpha;
}
/**
* gst_vaapi_subpicture_set_global_alpha:
* @subpicture: a #GstVaapiSubpicture
* @global_alpha: value for global-alpha (range: 0.0 to 1.0, inclusive)
*
* Sets the global_alpha value of @subpicture. This function calls
* vaSetSubpictureGlobalAlpha() if the format of @subpicture, i.e.
* the current VA driver supports it.
*
* Return value: %TRUE if global_alpha could be set, %FALSE otherwise
*/
gboolean
gst_vaapi_subpicture_set_global_alpha (GstVaapiSubpicture * subpicture,
gfloat global_alpha)
{
GstVaapiDisplay *display;
VAStatus status;
g_return_val_if_fail (subpicture != NULL, FALSE);
if (!(subpicture->flags & GST_VAAPI_SUBPICTURE_FLAG_GLOBAL_ALPHA))
return FALSE;
if (subpicture->global_alpha == global_alpha)
return TRUE;
display = subpicture->display;
GST_VAAPI_DISPLAY_LOCK (display);
status = vaSetSubpictureGlobalAlpha (GST_VAAPI_DISPLAY_VADISPLAY (display),
subpicture->object_id, global_alpha);
GST_VAAPI_DISPLAY_UNLOCK (display);
if (!vaapi_check_status (status, "vaSetSubpictureGlobalAlpha()"))
return FALSE;
subpicture->global_alpha = global_alpha;
return TRUE;
}