зеркало из https://github.com/mozilla/gecko-dev.git
95 строки
3.6 KiB
C++
95 строки
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* Copyright (c) 2011, The WebRTC project authors. All rights reserved.
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* Copyright (c) 2014, Mozilla
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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** Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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** Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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** Neither the name of Google nor the names of its contributors may
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* be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef GMP_VIDEO_PLANE_h_
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#define GMP_VIDEO_PLANE_h_
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#include "gmp-errors.h"
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#include <stdint.h>
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// The implementation backing this interface uses shared memory for the
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// buffer(s). This means it can only be used by the "owning" process.
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// At first the process which created the object owns it. When the object
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// is passed to an interface the creator loses ownership and must Destroy()
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// the object. Further attempts to use it may fail due to not being able to
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// access the underlying buffer(s).
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//
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// Methods that create or destroy shared memory must be called on the main
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// thread. They are marked below.
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class GMPPlane {
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public:
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// MAIN THREAD ONLY
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// CreateEmptyPlane - set allocated size, actual plane size and stride:
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// If current size is smaller than current size, then a buffer of sufficient
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// size will be allocated.
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virtual GMPErr CreateEmptyPlane(int32_t aAllocatedSize, int32_t aStride,
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int32_t aPlaneSize) = 0;
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// MAIN THREAD ONLY
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// Copy the entire plane data.
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virtual GMPErr Copy(const GMPPlane& aPlane) = 0;
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// MAIN THREAD ONLY
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// Copy buffer: If current size is smaller
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// than current size, then a buffer of sufficient size will be allocated.
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virtual GMPErr Copy(int32_t aSize, int32_t aStride,
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const uint8_t* aBuffer) = 0;
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// Swap plane data.
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virtual void Swap(GMPPlane& aPlane) = 0;
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// Get allocated size.
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virtual int32_t AllocatedSize() const = 0;
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// Set actual size.
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virtual void ResetSize() = 0;
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// Return true is plane size is zero, false if not.
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virtual bool IsZeroSize() const = 0;
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// Get stride value.
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virtual int32_t Stride() const = 0;
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// Return data pointer.
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virtual const uint8_t* Buffer() const = 0;
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// Overloading with non-const.
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virtual uint8_t* Buffer() = 0;
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// MAIN THREAD ONLY IF OWNING PROCESS
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// Call this when done with the object. This may delete it.
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virtual void Destroy() = 0;
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};
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#endif // GMP_VIDEO_PLANE_h_
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