gstreamer/gst-libs/gst/vaapi/gstvaapisubpicture.c
2013-07-09 17:16:35 +02:00

390 lines
11 KiB
C

/*
* gstvaapisubpicture.c - VA subpicture abstraction
*
* Copyright (C) 2010-2011 Splitted-Desktop Systems
* Copyright (C) 2011-2013 Intel Corporation
*
* 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.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* 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
*/
/**
* SECTION:gstvaapisubpicture
* @short_description: VA subpicture abstraction
*/
#include "sysdeps.h"
#include <string.h>
#include "gstvaapicompat.h"
#include "gstvaapiutils.h"
#include "gstvaapisubpicture.h"
#include "gstvaapiobject_priv.h"
#define DEBUG 1
#include "gstvaapidebug.h"
typedef struct _GstVaapiSubpictureClass GstVaapiSubpictureClass;
/**
* GstVaapiSubpicture:
*
* A VA subpicture wrapper
*/
struct _GstVaapiSubpicture {
/*< private >*/
GstVaapiObject parent_instance;
GstVaapiImage *image;
guint flags;
gfloat global_alpha;
};
/**
* GstVaapiSubpictureClass:
*
* A VA subpicture wrapper class
*/
struct _GstVaapiSubpictureClass {
/*< private >*/
GstVaapiObjectClass parent_class;
};
static void
gst_vaapi_subpicture_destroy(GstVaapiSubpicture *subpicture)
{
GstVaapiDisplay * const display = GST_VAAPI_OBJECT_DISPLAY(subpicture);
VASubpictureID subpicture_id;
VAStatus status;
subpicture_id = GST_VAAPI_OBJECT_ID(subpicture);
GST_DEBUG("subpicture %" GST_VAAPI_ID_FORMAT,
GST_VAAPI_ID_ARGS(subpicture_id));
if (subpicture_id != VA_INVALID_ID) {
if (display) {
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()"))
g_warning("failed to destroy subpicture %" GST_VAAPI_ID_FORMAT,
GST_VAAPI_ID_ARGS(subpicture_id));
}
GST_VAAPI_OBJECT_ID(subpicture) = VA_INVALID_ID;
}
gst_vaapi_object_replace(&subpicture->image, NULL);
}
static gboolean
gst_vaapi_subpicture_create(GstVaapiSubpicture *subpicture,
GstVaapiImage *image)
{
GstVaapiDisplay * const display = GST_VAAPI_OBJECT_DISPLAY(subpicture);
VASubpictureID subpicture_id;
VAStatus status;
GST_VAAPI_DISPLAY_LOCK(display);
status = vaCreateSubpicture(
GST_VAAPI_DISPLAY_VADISPLAY(display),
GST_VAAPI_OBJECT_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));
GST_VAAPI_OBJECT_ID(subpicture) = subpicture_id;
subpicture->image = gst_vaapi_object_ref(image);
return TRUE;
}
#define gst_vaapi_subpicture_finalize gst_vaapi_subpicture_destroy
GST_VAAPI_OBJECT_DEFINE_CLASS(GstVaapiSubpicture, gst_vaapi_subpicture)
/**
* gst_vaapi_subpicture_new:
* @image: a #GstVaapiImage
* @flags: #GstVaapiSubpictureFlags, or zero
*
* 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)
{
GstVaapiSubpicture *subpicture;
GstVaapiDisplay *display;
GstVideoFormat format;
guint va_flags;
g_return_val_if_fail(image != NULL, NULL);
GST_DEBUG("create from image %" GST_VAAPI_ID_FORMAT,
GST_VAAPI_ID_ARGS(GST_VAAPI_OBJECT_ID(image)));
display = GST_VAAPI_OBJECT_DISPLAY(image);
format = gst_vaapi_image_get_format(image);
if (!gst_vaapi_display_has_subpicture_format(display, format, &va_flags))
return NULL;
if (flags & ~va_flags)
return NULL;
subpicture = gst_vaapi_object_new(gst_vaapi_subpicture_class(), display);
if (!subpicture)
return NULL;
subpicture->global_alpha = 1.0f;
if (!gst_vaapi_subpicture_set_image(subpicture, image))
goto error;
return subpicture;
error:
gst_vaapi_object_unref(subpicture);
return NULL;
}
/**
* 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;
#if GST_CHECK_VERSION(1,0,0)
GstVideoMeta *vmeta;
GstMapInfo map_info;
#endif
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));
#if GST_CHECK_VERSION(1,0,0)
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;
#else
buffer = (gst_video_overlay_rectangle_get_pixels_unscaled_argb)(rect,
&width, &height, &stride, to_GstVideoOverlayFormatFlags(flags));
if (!buffer)
return NULL;
data = GST_BUFFER_DATA(buffer);
#endif
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);
#if GST_CHECK_VERSION(1,0,0)
gst_video_meta_unmap(vmeta, 0, &map_info);
#endif
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 GST_VAAPI_OBJECT_ID(subpicture);
}
/**
* 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;
}
/**
* 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
*/
GstVaapiImage *
gst_vaapi_subpicture_get_image(GstVaapiSubpicture *subpicture)
{
g_return_val_if_fail(subpicture != NULL, NULL);
return subpicture->image;
}
/**
* 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
*/
gboolean
gst_vaapi_subpicture_set_image(GstVaapiSubpicture *subpicture,
GstVaapiImage *image)
{
g_return_val_if_fail(subpicture != NULL, FALSE);
g_return_val_if_fail(image != NULL, FALSE);
gst_vaapi_subpicture_destroy(subpicture);
return gst_vaapi_subpicture_create(subpicture, image);
}
/**
* 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 = GST_VAAPI_OBJECT_DISPLAY(subpicture);
GST_VAAPI_DISPLAY_LOCK(display);
status = vaSetSubpictureGlobalAlpha(
GST_VAAPI_DISPLAY_VADISPLAY(display),
GST_VAAPI_OBJECT_ID(subpicture),
global_alpha
);
GST_VAAPI_DISPLAY_UNLOCK(display);
if (!vaapi_check_status(status, "vaSetSubpictureGlobalAlpha()"))
return FALSE;
subpicture->global_alpha = global_alpha;
return TRUE;
}