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116 lines
3.7 KiB
116 lines
3.7 KiB
/*
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* Copyright (C) 2017 The Android Open Source Project
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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 AAUDIO_AAUDIO_SERVICE_STREAM_SHARED_H
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#define AAUDIO_AAUDIO_SERVICE_STREAM_SHARED_H
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#include "fifo/FifoBuffer.h"
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#include "binding/AAudioServiceMessage.h"
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#include "binding/AAudioStreamRequest.h"
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#include "binding/AAudioStreamConfiguration.h"
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#include "AAudioService.h"
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#include "AAudioServiceStreamBase.h"
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namespace aaudio {
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// We expect the queue to only have a few commands.
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// This should be way more than we need.
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#define QUEUE_UP_CAPACITY_COMMANDS (128)
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class AAudioEndpointManager;
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class AAudioServiceEndpoint;
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class SharedRingBuffer;
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/**
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* One of these is created for every MODE_SHARED stream in the AAudioService.
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*
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* Each Shared stream will register itself with an AAudioServiceEndpoint when it is opened.
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*/
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class AAudioServiceStreamShared : public AAudioServiceStreamBase {
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public:
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AAudioServiceStreamShared(android::AAudioService &aAudioService);
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virtual ~AAudioServiceStreamShared() = default;
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aaudio_result_t open(const aaudio::AAudioStreamRequest &request,
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aaudio::AAudioStreamConfiguration &configurationOutput) override;
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/**
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* Start the flow of audio data.
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*
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* This is not guaranteed to be synchronous but it currently is.
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* An AAUDIO_SERVICE_EVENT_STARTED will be sent to the client when complete.
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*/
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aaudio_result_t start() override;
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/**
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* Stop the flow of data so that start() can resume without loss of data.
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*
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* This is not guaranteed to be synchronous but it currently is.
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* An AAUDIO_SERVICE_EVENT_PAUSED will be sent to the client when complete.
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*/
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aaudio_result_t pause() override;
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/**
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* Stop the flow of data after data in buffer has played.
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*/
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aaudio_result_t stop() override;
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/**
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* Discard any data held by the underlying HAL or Service.
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*
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* This is not guaranteed to be synchronous but it currently is.
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* An AAUDIO_SERVICE_EVENT_FLUSHED will be sent to the client when complete.
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*/
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aaudio_result_t flush() override;
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aaudio_result_t close() override;
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android::FifoBuffer *getDataFifoBuffer() { return mAudioDataQueue->getFifoBuffer(); }
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/* Keep a record of when a buffer transfer completed.
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* This allows for a more accurate timing model.
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*/
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void markTransferTime(int64_t nanoseconds);
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protected:
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aaudio_result_t getDownDataDescription(AudioEndpointParcelable &parcelable) override;
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aaudio_result_t getFreeRunningPosition(int64_t *positionFrames, int64_t *timeNanos) override;
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/**
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* @param requestedCapacityFrames
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* @param framesPerBurst
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* @return capacity or negative error
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*/
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static int32_t calculateBufferCapacity(int32_t requestedCapacityFrames,
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int32_t framesPerBurst);
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private:
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android::AAudioService &mAudioService;
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AAudioServiceEndpoint *mServiceEndpoint = nullptr;
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SharedRingBuffer *mAudioDataQueue = nullptr;
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int64_t mMarkedPosition = 0;
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int64_t mMarkedTime = 0;
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};
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} /* namespace aaudio */
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#endif //AAUDIO_AAUDIO_SERVICE_STREAM_SHARED_H
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