зеркало из https://github.com/mozilla/gecko-dev.git
136 строки
5.4 KiB
C++
136 строки
5.4 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_ENCODE_h_
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#define GMP_VIDEO_ENCODE_h_
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#include <vector>
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#include <stdint.h>
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#include "gmp-errors.h"
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#include "gmp-video-frame-i420.h"
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#include "gmp-video-frame-encoded.h"
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#include "gmp-video-codec.h"
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// ALL METHODS MUST BE CALLED ON THE MAIN THREAD
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class GMPVideoEncoderCallback
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{
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public:
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virtual ~GMPVideoEncoderCallback() {}
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virtual void Encoded(GMPVideoEncodedFrame* aEncodedFrame,
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const uint8_t* aCodecSpecificInfo,
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uint32_t aCodecSpecificInfoLength) = 0;
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// Called when the encoder encounters a catestrophic error and cannot
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// continue. Gecko will not send any more input for encoding.
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virtual void Error(GMPErr aError) = 0;
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};
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#define GMP_API_VIDEO_ENCODER "encode-video"
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// Video encoding for a single stream. A GMP may be asked to create multiple
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// encoders concurrently.
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//
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// API name macro: GMP_API_VIDEO_ENCODER
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// Host API: GMPVideoHost
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//
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// ALL METHODS MUST BE CALLED ON THE MAIN THREAD
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class GMPVideoEncoder
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{
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public:
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virtual ~GMPVideoEncoder() {}
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// Initialize the encoder with the information from the VideoCodec.
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//
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// Input:
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// - codecSettings : Codec settings
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// - aCodecSpecific : codec specific data, pointer to a
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// GMPCodecSpecific structure appropriate for
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// this codec type.
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// - aCodecSpecificLength : number of bytes in aCodecSpecific
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// - aCallback: Subclass should retain reference to it until EncodingComplete
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// is called. Do not attempt to delete it, host retains ownership.
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// - aNnumberOfCores : Number of cores available for the encoder
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// - aMaxPayloadSize : The maximum size each payload is allowed
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// to have. Usually MTU - overhead.
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virtual void InitEncode(const GMPVideoCodec& aCodecSettings,
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const uint8_t* aCodecSpecific,
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uint32_t aCodecSpecificLength,
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GMPVideoEncoderCallback* aCallback,
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int32_t aNumberOfCores,
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uint32_t aMaxPayloadSize) = 0;
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// Encode an I420 frame (as a part of a video stream). The encoded frame
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// will be returned to the user through the encode complete callback.
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//
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// Input:
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// - aInputFrame : Frame to be encoded
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// - aCodecSpecificInfo : codec specific data, pointer to a
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// GMPCodecSpecificInfo structure appropriate for
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// this codec type.
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// - aCodecSpecificInfoLength : number of bytes in aCodecSpecific
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// - aFrameTypes : The frame type to encode
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// - aFrameTypesLength : The number of elements in aFrameTypes array.
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virtual void Encode(GMPVideoi420Frame* aInputFrame,
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const uint8_t* aCodecSpecificInfo,
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uint32_t aCodecSpecificInfoLength,
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const GMPVideoFrameType* aFrameTypes,
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uint32_t aFrameTypesLength) = 0;
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// Inform the encoder about the packet loss and round trip time on the
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// network used to decide the best pattern and signaling.
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//
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// - packetLoss : Fraction lost (loss rate in percent =
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// 100 * packetLoss / 255)
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// - rtt : Round-trip time in milliseconds
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virtual void SetChannelParameters(uint32_t aPacketLoss, uint32_t aRTT) = 0;
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// Inform the encoder about the new target bit rate.
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//
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// - newBitRate : New target bit rate
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// - frameRate : The target frame rate
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virtual void SetRates(uint32_t aNewBitRate, uint32_t aFrameRate) = 0;
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// Use this function to enable or disable periodic key frames. Can be useful for codecs
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// which have other ways of stopping error propagation.
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//
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// - enable : Enable or disable periodic key frames
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virtual void SetPeriodicKeyFrames(bool aEnable) = 0;
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// May free Encoder memory.
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virtual void EncodingComplete() = 0;
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};
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#endif // GMP_VIDEO_ENCODE_h_
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