/*
* Copyright (c) 2007 Intel Corporation. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* Initial EGL backend, and subject to change
*
* Gstreamer gst-gltexture has a framework to support associating a buffer
* to a texture via EGL_KHR_image_base and GL_OES_EGL_image_external.
*
* EGL_KHR_image_base:
* EGLImageKHR eglCreateImageKHR(
* EGLDisplay dpy,
* EGLContext ctx,
* EGLenum target,
* EGLClientBuffer buffer,
* const EGLint *attrib_list)
*
* GL_OES_EGL_image_external:
* This extension provides a mechanism for creating EGLImage texture targets
* from EGLImages. This extension defines a new texture target TEXTURE_EXTERNAL_OES.
* This texture target can only be specified using an EGLImage.
* The first eglCreateImageKHR will create an EGLImage from an EGLClientBufferm, and with
* an EGLImage, gst-gltexture can use GL_OES_EGL_image_external extension to create textures.
*
* eglCreateImageKHR and GL_OES_EGL_image_external are all called directly from gst-gltexture,
* thus the simplest way to support gst-gltexture is defining a new API to pass EGLClientBuffer
* to gst-gltexture.
*
* EGLClientBuffer is gfx/video driver implementation specific (?). It means we need to pass up
* the low-level buffer ID (or handle) of the decoded surface to gst-gltexture, and gst-gltexture
* then pass down it to gfx driver.
*
* Bellow API vaGetEGLClientBufferFromSurface is for this purpose
*/
#include "va.h"
#include "va_backend_egl.h"
#include "va_egl.h"
#define CTX(dpy) (((VADisplayContextP)dpy)->pDriverContext)
#define CHECK_DISPLAY(dpy) if( !vaDisplayIsValid(dpy) ) { return VA_STATUS_ERROR_INVALID_DISPLAY; }
VAStatus vaGetEGLClientBufferFromSurface (
VADisplay dpy,
VASurfaceID surface,
EGLClientBuffer *buffer /* out*/
)
{
VADriverContextP ctx;
struct VADriverVTableEGL *va_egl;
CHECK_DISPLAY(dpy);
ctx = CTX(dpy);
va_egl = (struct VADriverVTableEGL *)ctx->vtable_egl;
if (va_egl && va_egl->vaGetEGLClientBufferFromSurface) {
return va_egl->vaGetEGLClientBufferFromSurface(ctx, surface, buffer);
} else
return VA_STATUS_ERROR_UNIMPLEMENTED;
}