зеркало из https://github.com/mozilla/gecko-dev.git
133 строки
5.1 KiB
C++
133 строки
5.1 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_FRAME_I420_h_
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#define GMP_VIDEO_FRAME_I420_h_
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#include "gmp-errors.h"
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#include "gmp-video-frame.h"
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#include "gmp-video-plane.h"
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#include <stdint.h>
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enum GMPPlaneType {
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kGMPYPlane = 0,
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kGMPUPlane = 1,
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kGMPVPlane = 2,
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kGMPNumOfPlanes = 3
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};
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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 GMPVideoi420Frame : public GMPVideoFrame {
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public:
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// MAIN THREAD ONLY
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// CreateEmptyFrame: Sets frame dimensions and allocates buffers based
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// on set dimensions - height and plane stride.
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// If required size is bigger than the allocated one, new buffers of adequate
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// size will be allocated.
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virtual GMPErr CreateEmptyFrame(int32_t aWidth, int32_t aHeight,
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int32_t aStride_y, int32_t aStride_u, int32_t aStride_v) = 0;
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// MAIN THREAD ONLY
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// CreateFrame: Sets the frame's members and buffers. If required size is
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// bigger than allocated one, new buffers of adequate size will be allocated.
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virtual GMPErr CreateFrame(int32_t aSize_y, const uint8_t* aBuffer_y,
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int32_t aSize_u, const uint8_t* aBuffer_u,
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int32_t aSize_v, const uint8_t* aBuffer_v,
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int32_t aWidth, int32_t aHeight,
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int32_t aStride_y, int32_t aStride_u, int32_t aStride_v) = 0;
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// MAIN THREAD ONLY
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// Copy frame: If required size is bigger than allocated one, new buffers of
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// adequate size will be allocated.
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virtual GMPErr CopyFrame(const GMPVideoi420Frame& aVideoFrame) = 0;
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// Swap Frame.
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virtual void SwapFrame(GMPVideoi420Frame* aVideoFrame) = 0;
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// Get pointer to buffer per plane.
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virtual uint8_t* Buffer(GMPPlaneType aType) = 0;
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// Overloading with const.
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virtual const uint8_t* Buffer(GMPPlaneType aType) const = 0;
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// Get allocated size per plane.
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virtual int32_t AllocatedSize(GMPPlaneType aType) const = 0;
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// Get allocated stride per plane.
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virtual int32_t Stride(GMPPlaneType aType) const = 0;
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// Set frame width.
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virtual GMPErr SetWidth(int32_t aWidth) = 0;
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// Set frame height.
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virtual GMPErr SetHeight(int32_t aHeight) = 0;
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// Get frame width.
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virtual int32_t Width() const = 0;
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// Get frame height.
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virtual int32_t Height() const = 0;
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// Set frame timestamp (microseconds)
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virtual void SetTimestamp(uint64_t aTimestamp) = 0;
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// Get frame timestamp (microseconds)
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virtual uint64_t Timestamp() const = 0;
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// Set frame duration (microseconds)
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// NOTE: next-frame's Timestamp() != this-frame's TimeStamp()+Duration()
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// depending on rounding to avoid having to track roundoff errors
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// and dropped/missing frames(!) (which may leave a large gap)
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virtual void SetDuration(uint64_t aDuration) = 0;
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// Get frame duration (microseconds)
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virtual uint64_t Duration() const = 0;
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// Return true if underlying plane buffers are of zero size, false if not.
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virtual bool IsZeroSize() const = 0;
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// Reset underlying plane buffers sizes to 0. This function doesn't clear memory.
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virtual void ResetSize() = 0;
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};
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#endif // GMP_VIDEO_FRAME_I420_h_
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