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