109 lines
3.9 KiB
C++
109 lines
3.9 KiB
C++
/* -LICENSE-START-
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** Copyright (c) 2012 Blackmagic Design
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**
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** Permission is hereby granted, free of charge, to any person or organization
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** obtaining a copy of the software and accompanying documentation (the
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** "Software") to use, reproduce, display, distribute, sub-license, execute,
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** and transmit the Software, and to prepare derivative works of the Software,
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** and to permit third-parties to whom the Software is furnished to do so, in
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** accordance with:
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**
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** (1) if the Software is obtained from Blackmagic Design, the End User License
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** Agreement for the Software Development Kit ("EULA") available at
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** https://www.blackmagicdesign.com/EULA/DeckLinkSDK; or
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**
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** (2) if the Software is obtained from any third party, such licensing terms
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** as notified by that third party,
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**
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** and all subject to the following:
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**
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** (3) the copyright notices in the Software and this entire statement,
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** including the above license grant, this restriction and the following
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** disclaimer, must be included in all copies of the Software, in whole or in
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** part, and all derivative works of the Software, unless such copies or
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** derivative works are solely in the form of machine-executable object code
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** generated by a source language processor.
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**
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** (4) 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 MERCHANTABILITY,
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** FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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** SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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** FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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** ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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** DEALINGS IN THE SOFTWARE.
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**
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** A copy of the Software is available free of charge at
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** https://www.blackmagicdesign.com/desktopvideo_sdk under the EULA.
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**
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** -LICENSE-END-
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*/
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#ifndef __VIDEO_FRAME_TRANSFER_H__
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#define __VIDEO_FRAME_TRANSFER_H__
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#include "GLExtensions.h"
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#include <stdexcept>
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#include <map>
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// NVIDIA GPU Direct For Video with OpenGL requires the following two headers.
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// See the NVIDIA website to check if your graphics card is supported.
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#include <DVPAPI.h>
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#include <dvpapi_gl.h>
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struct SyncInfo;
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// Class for performing efficient frame memory transfers between the CPU and GPU,
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// using NVIDIA and AMD extensions.
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class VideoFrameTransfer
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{
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public:
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enum Direction
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{
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CPUtoGPU,
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GPUtoCPU
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};
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VideoFrameTransfer(unsigned long memSize, void* address, Direction direction);
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~VideoFrameTransfer();
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static bool checkFastMemoryTransferAvailable();
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static bool initialize(unsigned width, unsigned height, GLuint captureTexture, GLuint playbackTexture);
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static void beginTextureInUse(Direction direction);
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static void endTextureInUse(Direction direction);
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bool performFrameTransfer();
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void waitForTransferComplete();
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private:
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static bool isNvidiaDvpAvailable();
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static bool isAMDPinnedMemoryAvailable();
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static bool initializeMemoryLocking(unsigned memSize);
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void* mBuffer;
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unsigned long mMemSize;
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Direction mDirection;
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static bool mInitialized;
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static bool mUseDvp;
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static unsigned mWidth;
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static unsigned mHeight;
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static GLuint mCaptureTexture;
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// NVIDIA GPU Direct for Video support
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SyncInfo* mExtSync;
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SyncInfo* mGpuSync;
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DVPBufferHandle mDvpSysMemHandle;
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static DVPBufferHandle mDvpCaptureTextureHandle;
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static DVPBufferHandle mDvpPlaybackTextureHandle;
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static uint32_t mBufferAddrAlignment;
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static uint32_t mBufferGpuStrideAlignment;
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static uint32_t mSemaphoreAddrAlignment;
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static uint32_t mSemaphoreAllocSize;
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static uint32_t mSemaphorePayloadOffset;
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static uint32_t mSemaphorePayloadSize;
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// GPU buffer bound to the target GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD for pinned memory
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GLuint mBufferHandle;
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};
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#endif |