/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* Copyright (c) 2011, The WebRTC project authors. All rights reserved. * Copyright (c) 2014, Mozilla * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * ** Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * ** Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * ** Neither the name of Google nor the names of its contributors may * be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Called when the encoder encounters a catestrophic error and cannot // continue. Gecko will not send any more input for encoding. virtualvoid Error(GMPErr aError) = 0;
};
#define GMP_API_VIDEO_ENCODER "encode-video"
// Video encoding for a single stream. A GMP may be asked to create multiple // encoders concurrently. // // API name macro: GMP_API_VIDEO_ENCODER // Host API: GMPVideoHost // // ALL METHODS MUST BE CALLED ON THE MAIN THREAD class GMPVideoEncoder { public: virtual ~GMPVideoEncoder() {}
// Initialize the encoder with the information from the VideoCodec. // // Input: // - codecSettings : Codec settings // - aCodecSpecific : codec specific data, pointer to a // GMPCodecSpecific structure appropriate for // this codec type. // - aCodecSpecificLength : number of bytes in aCodecSpecific // - aCallback: Subclass should retain reference to it until EncodingComplete // is called. Do not attempt to delete it, host retains // ownership. // - aNnumberOfCores : Number of cores available for the encoder // - aMaxPayloadSize : The maximum size each payload is allowed // to have. Usually MTU - overhead. virtualvoid InitEncode(const GMPVideoCodec& aCodecSettings, const uint8_t* aCodecSpecific,
uint32_t aCodecSpecificLength,
GMPVideoEncoderCallback* aCallback,
int32_t aNumberOfCores, uint32_t aMaxPayloadSize) = 0;
// Encode an I420 frame (as a part of a video stream). The encoded frame // will be returned to the user through the encode complete callback. // // Input: // - aInputFrame : Frame to be encoded // - aCodecSpecificInfo : codec specific data, pointer to a // GMPCodecSpecificInfo structure appropriate for // this codec type. // - aCodecSpecificInfoLength : number of bytes in aCodecSpecific // - aFrameTypes : The frame type to encode // - aFrameTypesLength : The number of elements in aFrameTypes array. virtualvoid Encode(GMPVideoi420Frame* aInputFrame, const uint8_t* aCodecSpecificInfo,
uint32_t aCodecSpecificInfoLength, const GMPVideoFrameType* aFrameTypes,
uint32_t aFrameTypesLength) = 0;
// Inform the encoder about the packet loss and round trip time on the // network used to decide the best pattern and signaling. // // - packetLoss : Fraction lost (loss rate in percent = // 100 * packetLoss / 255) // - rtt : Round-trip time in milliseconds virtualvoid SetChannelParameters(uint32_t aPacketLoss, uint32_t aRTT) = 0;
// Inform the encoder about the new target bit rate. // // - newBitRate : New target bit rate // - frameRate : The target frame rate virtualvoid SetRates(uint32_t aNewBitRate, uint32_t aFrameRate) = 0;
// Use this function to enable or disable periodic key frames. Can be useful // for codecs which have other ways of stopping error propagation. // // - enable : Enable or disable periodic key frames virtualvoid SetPeriodicKeyFrames(bool aEnable) = 0;
// May free Encoder memory. virtualvoid EncodingComplete() = 0;
};
#endif// GMP_VIDEO_ENCODE_h_
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