/* -*- 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 decoder encounters a catestrophic error and cannot // continue. Gecko will not send any more input for decoding. virtualvoid Error(GMPErr aError) = 0;
};
#define GMP_API_VIDEO_DECODER "decode-video"
// Video decoding for a single stream. A GMP may be asked to create multiple // decoders concurrently. // // API name macro: GMP_API_VIDEO_DECODER // Host API: GMPVideoHost // // ALL METHODS MUST BE CALLED ON THE MAIN THREAD class GMPVideoDecoder { public: virtual ~GMPVideoDecoder() {}
// - aCodecSettings: Details of decoder to create. // - aCodecSpecific: codec specific data, cast to a GMPVideoCodecXXX struct // to get codec specific config data. // - aCodecSpecificLength: number of bytes in aCodecSpecific. // - aCallback: Subclass should retain reference to it until DecodingComplete // is called. Do not attempt to delete it, host retains // ownership. // aCoreCount: number of CPU cores. virtualvoid InitDecode(const GMPVideoCodec& aCodecSettings, const uint8_t* aCodecSpecific,
uint32_t aCodecSpecificLength,
GMPVideoDecoderCallback* aCallback,
int32_t aCoreCount) = 0;
// Decode encoded frame (as a part of a video stream). The decoded frame // will be returned to the user through the decode complete callback. // // - aInputFrame: Frame to decode. Call Destroy() on frame when it's decoded. // - aMissingFrames: True if one or more frames have been lost since the // previous decode call. // - aCodecSpecificInfo : codec specific data, pointer to a // GMPCodecSpecificInfo structure appropriate for // this codec type. // - aCodecSpecificInfoLength : number of bytes in aCodecSpecificInfo // - renderTimeMs : System time to render in milliseconds. Only used by // decoders with internal rendering. virtualvoid Decode(GMPVideoEncodedFrame* aInputFrame, bool aMissingFrames, const uint8_t* aCodecSpecificInfo,
uint32_t aCodecSpecificInfoLength,
int64_t aRenderTimeMs = -1) = 0;
// Reset decoder state and prepare for a new call to Decode(...). // Flushes the decoder pipeline. // The decoder should enqueue a task to run ResetComplete() on the main // thread once the reset has finished. virtualvoid Reset() = 0;
// Output decoded frames for any data in the pipeline, regardless of ordering. // All remaining decoded frames should be immediately returned via callback. // The decoder should enqueue a task to run DrainComplete() on the main // thread once the reset has finished. virtualvoid Drain() = 0;
// May free decoder memory. virtualvoid DecodingComplete() = 0;
};
#endif// GMP_VIDEO_DECODE_h_
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