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280 lines
11 KiB
280 lines
11 KiB
/*
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* Copyright (C) 2016 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 ANDROID_HARDWARE_STREAM_HAL_HIDL_H
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#define ANDROID_HARDWARE_STREAM_HAL_HIDL_H
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#include <atomic>
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#include PATH(android/hardware/audio/FILE_VERSION/IStream.h)
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#include PATH(android/hardware/audio/FILE_VERSION/IStreamIn.h)
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#include PATH(android/hardware/audio/FILE_VERSION/IStreamOut.h)
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#include <fmq/EventFlag.h>
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#include <fmq/MessageQueue.h>
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#include <media/audiohal/StreamHalInterface.h>
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#include <mediautils/Synchronization.h>
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#include "ConversionHelperHidl.h"
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#include "StreamPowerLog.h"
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using ::android::hardware::audio::CPP_VERSION::IStream;
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using ::android::hardware::audio::CPP_VERSION::IStreamIn;
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using ::android::hardware::audio::CPP_VERSION::IStreamOut;
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using ::android::hardware::EventFlag;
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using ::android::hardware::MessageQueue;
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using ::android::hardware::Return;
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using ReadParameters = ::android::hardware::audio::CPP_VERSION::IStreamIn::ReadParameters;
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using ReadStatus = ::android::hardware::audio::CPP_VERSION::IStreamIn::ReadStatus;
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using WriteCommand = ::android::hardware::audio::CPP_VERSION::IStreamOut::WriteCommand;
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using WriteStatus = ::android::hardware::audio::CPP_VERSION::IStreamOut::WriteStatus;
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namespace android {
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namespace CPP_VERSION {
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class DeviceHalHidl;
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class StreamHalHidl : public virtual StreamHalInterface, public ConversionHelperHidl
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{
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public:
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// Return size of input/output buffer in bytes for this stream - eg. 4800.
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virtual status_t getBufferSize(size_t *size);
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// Return the base configuration of the stream:
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// - channel mask;
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// - format - e.g. AUDIO_FORMAT_PCM_16_BIT;
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// - sampling rate in Hz - eg. 44100.
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virtual status_t getAudioProperties(audio_config_base_t *configBase);
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// Set audio stream parameters.
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virtual status_t setParameters(const String8& kvPairs);
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// Get audio stream parameters.
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virtual status_t getParameters(const String8& keys, String8 *values);
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// Add or remove the effect on the stream.
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virtual status_t addEffect(sp<EffectHalInterface> effect);
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virtual status_t removeEffect(sp<EffectHalInterface> effect);
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// Put the audio hardware input/output into standby mode.
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virtual status_t standby();
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virtual status_t dump(int fd);
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// Start a stream operating in mmap mode.
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virtual status_t start();
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// Stop a stream operating in mmap mode.
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virtual status_t stop();
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// Retrieve information on the data buffer in mmap mode.
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virtual status_t createMmapBuffer(int32_t minSizeFrames,
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struct audio_mmap_buffer_info *info);
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// Get current read/write position in the mmap buffer
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virtual status_t getMmapPosition(struct audio_mmap_position *position);
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// Set the priority of the thread that interacts with the HAL
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// (must match the priority of the audioflinger's thread that calls 'read' / 'write')
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virtual status_t setHalThreadPriority(int priority);
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protected:
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// Subclasses can not be constructed directly by clients.
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explicit StreamHalHidl(IStream *stream);
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~StreamHalHidl() override;
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status_t getCachedBufferSize(size_t *size);
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status_t getHalPid(pid_t *pid);
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bool requestHalThreadPriority(pid_t threadPid, pid_t threadId);
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// mStreamPowerLog is used for audio signal power logging.
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StreamPowerLog mStreamPowerLog;
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private:
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const int HAL_THREAD_PRIORITY_DEFAULT = -1;
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IStream * const mStream;
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int mHalThreadPriority;
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size_t mCachedBufferSize;
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};
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class StreamOutHalHidl : public StreamOutHalInterface, public StreamHalHidl {
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public:
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// Return the frame size (number of bytes per sample) of a stream.
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virtual status_t getFrameSize(size_t *size);
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// Return the audio hardware driver estimated latency in milliseconds.
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virtual status_t getLatency(uint32_t *latency);
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// Use this method in situations where audio mixing is done in the hardware.
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virtual status_t setVolume(float left, float right);
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// Selects the audio presentation (if available).
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virtual status_t selectPresentation(int presentationId, int programId);
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// Write audio buffer to driver.
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virtual status_t write(const void *buffer, size_t bytes, size_t *written);
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// Return the number of audio frames written by the audio dsp to DAC since
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// the output has exited standby.
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virtual status_t getRenderPosition(uint32_t *dspFrames);
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// Get the local time at which the next write to the audio driver will be presented.
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virtual status_t getNextWriteTimestamp(int64_t *timestamp);
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// Set the callback for notifying completion of non-blocking write and drain.
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virtual status_t setCallback(wp<StreamOutHalInterfaceCallback> callback);
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// Returns whether pause and resume operations are supported.
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virtual status_t supportsPauseAndResume(bool *supportsPause, bool *supportsResume);
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// Notifies to the audio driver to resume playback following a pause.
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virtual status_t pause();
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// Notifies to the audio driver to resume playback following a pause.
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virtual status_t resume();
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// Returns whether drain operation is supported.
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virtual status_t supportsDrain(bool *supportsDrain);
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// Requests notification when data buffered by the driver/hardware has been played.
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virtual status_t drain(bool earlyNotify);
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// Notifies to the audio driver to flush the queued data.
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virtual status_t flush();
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// Return a recent count of the number of audio frames presented to an external observer.
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virtual status_t getPresentationPosition(uint64_t *frames, struct timespec *timestamp);
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// Called when the metadata of the stream's source has been changed.
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status_t updateSourceMetadata(const SourceMetadata& sourceMetadata) override;
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// Methods used by StreamOutCallback (HIDL).
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void onWriteReady();
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void onDrainReady();
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void onError();
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// Returns the Dual Mono mode presentation setting.
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status_t getDualMonoMode(audio_dual_mono_mode_t* mode) override;
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// Sets the Dual Mono mode presentation on the output device.
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status_t setDualMonoMode(audio_dual_mono_mode_t mode) override;
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// Returns the Audio Description Mix level in dB.
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status_t getAudioDescriptionMixLevel(float* leveldB) override;
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// Sets the Audio Description Mix level in dB.
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status_t setAudioDescriptionMixLevel(float leveldB) override;
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// Retrieves current playback rate parameters.
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status_t getPlaybackRateParameters(audio_playback_rate_t* playbackRate) override;
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// Sets the playback rate parameters that control playback behavior.
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status_t setPlaybackRateParameters(const audio_playback_rate_t& playbackRate) override;
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status_t setEventCallback(const sp<StreamOutHalInterfaceEventCallback>& callback) override;
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// Methods used by StreamCodecFormatCallback (HIDL).
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void onCodecFormatChanged(const std::basic_string<uint8_t>& metadataBs);
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private:
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friend class DeviceHalHidl;
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typedef MessageQueue<WriteCommand, hardware::kSynchronizedReadWrite> CommandMQ;
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typedef MessageQueue<uint8_t, hardware::kSynchronizedReadWrite> DataMQ;
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typedef MessageQueue<WriteStatus, hardware::kSynchronizedReadWrite> StatusMQ;
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mediautils::atomic_wp<StreamOutHalInterfaceCallback> mCallback;
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mediautils::atomic_wp<StreamOutHalInterfaceEventCallback> mEventCallback;
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const sp<IStreamOut> mStream;
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std::unique_ptr<CommandMQ> mCommandMQ;
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std::unique_ptr<DataMQ> mDataMQ;
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std::unique_ptr<StatusMQ> mStatusMQ;
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std::atomic<pid_t> mWriterClient;
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EventFlag* mEfGroup;
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// Can not be constructed directly by clients.
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StreamOutHalHidl(const sp<IStreamOut>& stream);
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virtual ~StreamOutHalHidl();
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using WriterCallback = std::function<void(const WriteStatus& writeStatus)>;
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status_t callWriterThread(
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WriteCommand cmd, const char* cmdName,
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const uint8_t* data, size_t dataSize, WriterCallback callback);
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status_t prepareForWriting(size_t bufferSize);
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};
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class StreamInHalHidl : public StreamInHalInterface, public StreamHalHidl {
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public:
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// Return the frame size (number of bytes per sample) of a stream.
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virtual status_t getFrameSize(size_t *size);
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// Set the input gain for the audio driver.
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virtual status_t setGain(float gain);
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// Read audio buffer in from driver.
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virtual status_t read(void *buffer, size_t bytes, size_t *read);
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// Return the amount of input frames lost in the audio driver.
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virtual status_t getInputFramesLost(uint32_t *framesLost);
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// Return a recent count of the number of audio frames received and
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// the clock time associated with that frame count.
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virtual status_t getCapturePosition(int64_t *frames, int64_t *time);
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// Get active microphones
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virtual status_t getActiveMicrophones(std::vector<media::MicrophoneInfo> *microphones);
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// Set microphone direction (for processing)
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virtual status_t setPreferredMicrophoneDirection(
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audio_microphone_direction_t direction) override;
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// Set microphone zoom (for processing)
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virtual status_t setPreferredMicrophoneFieldDimension(float zoom) override;
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// Called when the metadata of the stream's sink has been changed.
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status_t updateSinkMetadata(const SinkMetadata& sinkMetadata) override;
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private:
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friend class DeviceHalHidl;
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typedef MessageQueue<ReadParameters, hardware::kSynchronizedReadWrite> CommandMQ;
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typedef MessageQueue<uint8_t, hardware::kSynchronizedReadWrite> DataMQ;
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typedef MessageQueue<ReadStatus, hardware::kSynchronizedReadWrite> StatusMQ;
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const sp<IStreamIn> mStream;
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std::unique_ptr<CommandMQ> mCommandMQ;
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std::unique_ptr<DataMQ> mDataMQ;
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std::unique_ptr<StatusMQ> mStatusMQ;
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std::atomic<pid_t> mReaderClient;
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EventFlag* mEfGroup;
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// Can not be constructed directly by clients.
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StreamInHalHidl(const sp<IStreamIn>& stream);
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virtual ~StreamInHalHidl();
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using ReaderCallback = std::function<void(const ReadStatus& readStatus)>;
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status_t callReaderThread(
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const ReadParameters& params, const char* cmdName, ReaderCallback callback);
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status_t prepareForReading(size_t bufferSize);
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};
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} // namespace CPP_VERSION
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} // namespace android
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#endif // ANDROID_HARDWARE_STREAM_HAL_HIDL_H
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