2 * Copyright (c) 2007 Intel Corporation. All Rights Reserved.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sub license, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
12 * The above copyright notice and this permission notice (including the
13 * next paragraph) shall be included in all copies or substantial portions
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
19 * IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
20 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
21 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
22 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 * Initial EGL backend, and subject to change
28 * Gstreamer gst-gltexture has a framework to support associating a buffer
29 * to a texture via EGL_KHR_image_base and GL_OES_EGL_image_external.
32 * EGLImageKHR eglCreateImageKHR(
36 * EGLClientBuffer buffer,
37 * const EGLint *attrib_list)
39 * GL_OES_EGL_image_external:
40 * This extension provides a mechanism for creating EGLImage texture targets
41 * from EGLImages. This extension defines a new texture target TEXTURE_EXTERNAL_OES.
42 * This texture target can only be specified using an EGLImage.
43 * The first eglCreateImageKHR will create an EGLImage from an EGLClientBufferm, and with
44 * an EGLImage, gst-gltexture can use GL_OES_EGL_image_external extension to create textures.
46 * eglCreateImageKHR and GL_OES_EGL_image_external are all called directly from gst-gltexture,
47 * thus the simplest way to support gst-gltexture is defining a new API to pass EGLClientBuffer
50 * EGLClientBuffer is gfx/video driver implementation specific (?). It means we need to pass up
51 * the low-level buffer ID (or handle) of the decoded surface to gst-gltexture, and gst-gltexture
52 * then pass down it to gfx driver.
54 * Bellow API vaGetEGLClientBufferFromSurface is for this purpose
58 #include "va_backend_egl.h"
60 #include "va_internal.h"
63 VAStatus vaGetEGLClientBufferFromSurface (
66 EGLClientBuffer *buffer /* out*/
70 struct VADriverVTableEGL *va_egl;
74 va_egl = (struct VADriverVTableEGL *)ctx->vtable_egl;
75 if (va_egl && va_egl->vaGetEGLClientBufferFromSurface) {
76 return va_egl->vaGetEGLClientBufferFromSurface(ctx, surface, buffer);
78 return VA_STATUS_ERROR_UNIMPLEMENTED;