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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef AAUDIO_SERVICE_ENDPOINT_MMAP_H
#define AAUDIO_SERVICE_ENDPOINT_MMAP_H
#include <atomic>
#include <functional>
#include <mutex>
#include <vector>
#include "client/AudioStreamInternal.h"
#include "client/AudioStreamInternalPlay.h"
#include "binding/AAudioServiceMessage.h"
#include "AAudioServiceEndpointShared.h"
#include "AAudioServiceStreamShared.h"
#include "AAudioServiceStreamMMAP.h"
#include "AAudioMixer.h"
#include "AAudioService.h"
namespace aaudio {
/**
* This is used by AAudioServiceStreamMMAP to access the MMAP devices
* through AudioFlinger.
*/
class AAudioServiceEndpointMMAP
: public AAudioServiceEndpoint
, public android::MmapStreamCallback {
public:
explicit AAudioServiceEndpointMMAP(android::AAudioService &audioService);
virtual ~AAudioServiceEndpointMMAP() = default;
std::string dump() const override;
aaudio_result_t open(const aaudio::AAudioStreamRequest &request) override;
void close() override;
aaudio_result_t startStream(android::sp<AAudioServiceStreamBase> stream,
audio_port_handle_t *clientHandle) override;
aaudio_result_t stopStream(android::sp<AAudioServiceStreamBase> stream,
audio_port_handle_t clientHandle) override;
aaudio_result_t startClient(const android::AudioClient& client,
const audio_attributes_t *attr,
audio_port_handle_t *clientHandle) override;
aaudio_result_t stopClient(audio_port_handle_t clientHandle) override;
aaudio_result_t getFreeRunningPosition(int64_t *positionFrames, int64_t *timeNanos) override;
aaudio_result_t getTimestamp(int64_t *positionFrames, int64_t *timeNanos) override;
void handleTearDownAsync(audio_port_handle_t portHandle);
// -------------- Callback functions for MmapStreamCallback ---------------------
void onTearDown(audio_port_handle_t portHandle) override;
void onVolumeChanged(audio_channel_mask_t channels,
android::Vector<float> values) override;
void onRoutingChanged(audio_port_handle_t portHandle) override;
// ------------------------------------------------------------------------------
aaudio_result_t getDownDataDescription(AudioEndpointParcelable* parcelable);
int64_t getHardwareTimeOffsetNanos() const {
return mHardwareTimeOffsetNanos;
}
aaudio_result_t getExternalPosition(uint64_t *positionFrames, int64_t *timeNanos);
private:
aaudio_result_t openWithFormat(audio_format_t audioFormat);
MonotonicCounter mFramesTransferred;
// Interface to the AudioFlinger MMAP support.
android::sp<android::MmapStreamInterface> mMmapStream;
struct audio_mmap_buffer_info mMmapBufferinfo;
// There is only one port associated with an MMAP endpoint.
audio_port_handle_t mPortHandle = AUDIO_PORT_HANDLE_NONE;
android::AAudioService &mAAudioService;
android::base::unique_fd mAudioDataFileDescriptor;
int64_t mHardwareTimeOffsetNanos = 0; // TODO get from HAL
bool mExternalPositionSupported = true;
};
} /* namespace aaudio */
#endif //AAUDIO_SERVICE_ENDPOINT_MMAP_H