1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef AAUDIO_SERVICE_ENDPOINT_MMAP_H
18#define AAUDIO_SERVICE_ENDPOINT_MMAP_H
19
20#include <atomic>
21#include <functional>
22#include <mutex>
23#include <vector>
24
25#include "client/AudioStreamInternal.h"
26#include "client/AudioStreamInternalPlay.h"
27#include "binding/AAudioServiceMessage.h"
28#include "AAudioServiceEndpointShared.h"
29#include "AAudioServiceStreamShared.h"
30#include "AAudioServiceStreamMMAP.h"
31#include "AAudioMixer.h"
32#include "AAudioService.h"
33
34namespace aaudio {
35
36/**
37 * This is used by AAudioServiceStreamMMAP to access the MMAP devices
38 * through AudioFlinger.
39 */
40class AAudioServiceEndpointMMAP
41        : public AAudioServiceEndpoint
42        , public android::MmapStreamCallback {
43
44public:
45    explicit AAudioServiceEndpointMMAP(android::AAudioService &audioService);
46
47    virtual ~AAudioServiceEndpointMMAP();
48
49    std::string dump() const override;
50
51    aaudio_result_t open(const aaudio::AAudioStreamRequest &request) override;
52
53    aaudio_result_t close() override;
54
55    aaudio_result_t startStream(android::sp<AAudioServiceStreamBase> stream,
56                                audio_port_handle_t *clientHandle) override;
57
58    aaudio_result_t stopStream(android::sp<AAudioServiceStreamBase> stream,
59                               audio_port_handle_t clientHandle) override;
60
61    aaudio_result_t startClient(const android::AudioClient& client,
62                                        audio_port_handle_t *clientHandle)  override;
63
64    aaudio_result_t stopClient(audio_port_handle_t clientHandle)  override;
65
66    aaudio_result_t getFreeRunningPosition(int64_t *positionFrames, int64_t *timeNanos) override;
67
68    aaudio_result_t getTimestamp(int64_t *positionFrames, int64_t *timeNanos) override;
69
70    // -------------- Callback functions for MmapStreamCallback ---------------------
71    void onTearDown(audio_port_handle_t handle) override;
72
73    void onVolumeChanged(audio_channel_mask_t channels,
74                         android::Vector<float> values) override;
75
76    void onRoutingChanged(audio_port_handle_t deviceId) override;
77    // ------------------------------------------------------------------------------
78
79    aaudio_result_t getDownDataDescription(AudioEndpointParcelable &parcelable);
80
81    int64_t getHardwareTimeOffsetNanos() const {
82        return mHardwareTimeOffsetNanos;
83    }
84
85private:
86    MonotonicCounter                          mFramesTransferred;
87
88    // Interface to the AudioFlinger MMAP support.
89    android::sp<android::MmapStreamInterface> mMmapStream;
90    struct audio_mmap_buffer_info             mMmapBufferinfo;
91
92    // There is only one port associated with an MMAP endpoint.
93    audio_port_handle_t                       mPortHandle = AUDIO_PORT_HANDLE_NONE;
94
95    android::AAudioService                    &mAAudioService;
96
97    android::base::unique_fd                  mAudioDataFileDescriptor;
98
99    int64_t                                   mHardwareTimeOffsetNanos = 0; // TODO get from HAL
100
101};
102
103} /* namespace aaudio */
104
105#endif //AAUDIO_SERVICE_ENDPOINT_MMAP_H
106
107