forked from KolibriOS/kolibrios
83 lines
3.3 KiB
C
83 lines
3.3 KiB
C
/*
|
|
* 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;
|
|
}
|
|
|
|
|