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| Rev | Author | Line No. | Line |
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| 5362 | serge | 1 | /* |
| 2 | * Copyright (c) 2007 Intel Corporation. All Rights Reserved. |
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| 3 | * |
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| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 5 | * copy of this software and associated documentation files (the |
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| 6 | * "Software"), to deal in the Software without restriction, including |
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| 7 | * without limitation the rights to use, copy, modify, merge, publish, |
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| 8 | * distribute, sub license, and/or sell copies of the Software, and to |
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| 9 | * permit persons to whom the Software is furnished to do so, subject to |
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| 10 | * the following conditions: |
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| 11 | * |
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| 12 | * The above copyright notice and this permission notice (including the |
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| 13 | * next paragraph) shall be included in all copies or substantial portions |
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| 14 | * of the Software. |
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| 15 | * |
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| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 17 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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| 18 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
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| 19 | * IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR |
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| 20 | * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
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| 21 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
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| 22 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 23 | */ |
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| 24 | |||
| 25 | /* |
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| 26 | * Initial EGL backend, and subject to change |
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| 27 | * |
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| 28 | * Gstreamer gst-gltexture has a framework to support associating a buffer |
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| 29 | * to a texture via EGL_KHR_image_base and GL_OES_EGL_image_external. |
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| 30 | * |
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| 31 | * EGL_KHR_image_base: |
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| 32 | * EGLImageKHR eglCreateImageKHR( |
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| 33 | * EGLDisplay dpy, |
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| 34 | * EGLContext ctx, |
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| 35 | * EGLenum target, |
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| 36 | * EGLClientBuffer buffer, |
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| 37 | * const EGLint *attrib_list) |
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| 38 | * |
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| 39 | * GL_OES_EGL_image_external: |
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| 40 | * This extension provides a mechanism for creating EGLImage texture targets |
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| 41 | * from EGLImages. This extension defines a new texture target TEXTURE_EXTERNAL_OES. |
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| 42 | * This texture target can only be specified using an EGLImage. |
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| 43 | * The first eglCreateImageKHR will create an EGLImage from an EGLClientBufferm, and with |
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| 44 | * an EGLImage, gst-gltexture can use GL_OES_EGL_image_external extension to create textures. |
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| 45 | * |
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| 46 | * eglCreateImageKHR and GL_OES_EGL_image_external are all called directly from gst-gltexture, |
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| 47 | * thus the simplest way to support gst-gltexture is defining a new API to pass EGLClientBuffer |
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| 48 | * to gst-gltexture. |
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| 49 | * |
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| 50 | * EGLClientBuffer is gfx/video driver implementation specific (?). It means we need to pass up |
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| 51 | * the low-level buffer ID (or handle) of the decoded surface to gst-gltexture, and gst-gltexture |
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| 52 | * then pass down it to gfx driver. |
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| 53 | * |
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| 54 | * Bellow API vaGetEGLClientBufferFromSurface is for this purpose |
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| 55 | */ |
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| 56 | |||
| 57 | #include "va.h" |
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| 58 | #include "va_backend_egl.h" |
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| 59 | #include "va_egl.h" |
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| 60 | |||
| 61 | #define CTX(dpy) (((VADisplayContextP)dpy)->pDriverContext) |
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| 62 | #define CHECK_DISPLAY(dpy) if( !vaDisplayIsValid(dpy) ) { return VA_STATUS_ERROR_INVALID_DISPLAY; } |
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| 63 | |||
| 64 | VAStatus vaGetEGLClientBufferFromSurface ( |
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| 65 | VADisplay dpy, |
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| 66 | VASurfaceID surface, |
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| 67 | EGLClientBuffer *buffer /* out*/ |
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| 68 | ) |
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| 69 | { |
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| 70 | VADriverContextP ctx; |
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| 71 | struct VADriverVTableEGL *va_egl; |
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| 72 | CHECK_DISPLAY(dpy); |
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| 73 | ctx = CTX(dpy); |
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| 74 | |||
| 75 | va_egl = (struct VADriverVTableEGL *)ctx->vtable_egl; |
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| 76 | if (va_egl && va_egl->vaGetEGLClientBufferFromSurface) { |
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| 77 | return va_egl->vaGetEGLClientBufferFromSurface(ctx, surface, buffer); |
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| 78 | } else |
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| 79 | return VA_STATUS_ERROR_UNIMPLEMENTED; |
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| 80 | } |
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| 81 |