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85 lines
2.8 KiB
C++
85 lines
2.8 KiB
C++
/*
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* Copyright 2013, Mozilla Foundation and contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef GMP_AUDIO_DECODE_h_
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#define GMP_AUDIO_DECODE_h_
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#include "gmp-errors.h"
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#include "gmp-audio-samples.h"
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#include "gmp-audio-codec.h"
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#include <stdint.h>
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// ALL METHODS MUST BE CALLED ON THE MAIN THREAD
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class GMPAudioDecoderCallback
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{
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public:
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virtual ~GMPAudioDecoderCallback() {}
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virtual void Decoded(GMPAudioSamples* aDecodedSamples) = 0;
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virtual void InputDataExhausted() = 0;
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virtual void DrainComplete() = 0;
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virtual void ResetComplete() = 0;
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// Called when the decoder encounters a catestrophic error and cannot
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// continue. Gecko will not send any more input for decoding.
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virtual void Error(GMPErr aError) = 0;
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};
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#define GMP_API_AUDIO_DECODER "decode-audio"
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// Audio decoding for a single stream. A GMP may be asked to create multiple
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// decoders concurrently.
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//
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// API name macro: GMP_API_AUDIO_DECODER
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// Host API: GMPAudioHost
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//
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// ALL METHODS MUST BE CALLED ON THE MAIN THREAD
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class GMPAudioDecoder
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{
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public:
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virtual ~GMPAudioDecoder() {}
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// aCallback: Subclass should retain reference to it until DecodingComplete
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// is called. Do not attempt to delete it, host retains ownership.
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// TODO: Pass AudioHost so decoder can create GMPAudioEncodedFrame objects?
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virtual void InitDecode(const GMPAudioCodec& aCodecSettings,
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GMPAudioDecoderCallback* aCallback) = 0;
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// Decode encoded audio frames (as a part of an audio stream). The decoded
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// frames must be returned to the user through the decode complete callback.
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virtual void Decode(GMPAudioSamples* aEncodedSamples) = 0;
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// Reset decoder state and prepare for a new call to Decode(...).
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// Flushes the decoder pipeline.
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// The decoder should enqueue a task to run ResetComplete() on the main
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// thread once the reset has finished.
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virtual void Reset() = 0;
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// Output decoded frames for any data in the pipeline, regardless of ordering.
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// All remaining decoded frames should be immediately returned via callback.
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// The decoder should enqueue a task to run DrainComplete() on the main
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// thread once the reset has finished.
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virtual void Drain() = 0;
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// May free decoder memory.
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virtual void DecodingComplete() = 0;
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};
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#endif // GMP_VIDEO_DECODE_h_
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