1/*
2 * Copyright (C) 2016 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 ANDROID_AAUDIO_IAAUDIO_SERVICE_H
18#define ANDROID_AAUDIO_IAAUDIO_SERVICE_H
19
20#include <stdint.h>
21#include <utils/RefBase.h>
22#include <binder/TextOutput.h>
23#include <binder/IInterface.h>
24
25#include <aaudio/AAudio.h>
26
27#include "binding/AAudioServiceDefinitions.h"
28#include "binding/AudioEndpointParcelable.h"
29#include "binding/AAudioStreamRequest.h"
30#include "binding/AAudioStreamConfiguration.h"
31#include "utility/HandleTracker.h"
32
33namespace android {
34
35#define AAUDIO_SERVICE_NAME  "media.aaudio"
36
37// Interface (our AIDL) - Shared by server and client
38class IAAudioService : public IInterface {
39public:
40
41    DECLARE_META_INTERFACE(AAudioService);
42
43    /**
44     * @param request info needed to create the stream
45     * @param configuration contains information about the created stream
46     * @return handle to the stream or a negative error
47     */
48    virtual aaudio_handle_t openStream(const aaudio::AAudioStreamRequest &request,
49                                     aaudio::AAudioStreamConfiguration &configurationOutput) = 0;
50
51    virtual aaudio_result_t closeStream(aaudio::aaudio_handle_t streamHandle) = 0;
52
53    /* Get an immutable description of the in-memory queues
54    * used to communicate with the underlying HAL or Service.
55    */
56    virtual aaudio_result_t getStreamDescription(aaudio::aaudio_handle_t streamHandle,
57                                               aaudio::AudioEndpointParcelable &parcelable) = 0;
58
59    /**
60     * Start the flow of data.
61     * This is asynchronous. When complete, the service will send a STARTED event.
62     */
63    virtual aaudio_result_t startStream(aaudio::aaudio_handle_t streamHandle) = 0;
64
65    /**
66     * Stop the flow of data such that start() can resume without loss of data.
67     * This is asynchronous. When complete, the service will send a PAUSED event.
68     */
69    virtual aaudio_result_t pauseStream(aaudio::aaudio_handle_t streamHandle) = 0;
70
71    /**
72     * Stop the flow of data such that the data currently in the buffer is played.
73     * This is asynchronous. When complete, the service will send a STOPPED event.
74     */
75    virtual aaudio_result_t stopStream(aaudio::aaudio_handle_t streamHandle) = 0;
76
77    /**
78     *  Discard any data held by the underlying HAL or Service.
79     * This is asynchronous. When complete, the service will send a FLUSHED event.
80     */
81    virtual aaudio_result_t flushStream(aaudio::aaudio_handle_t streamHandle) = 0;
82
83    /**
84     * Manage the specified thread as a low latency audio thread.
85     * TODO Consider passing this information as part of the startStream() call.
86     */
87    virtual aaudio_result_t registerAudioThread(aaudio_handle_t streamHandle,
88                                              pid_t clientProcessId,
89                                              pid_t clientThreadId,
90                                              int64_t periodNanoseconds) = 0;
91
92    virtual aaudio_result_t unregisterAudioThread(aaudio_handle_t streamHandle,
93                                                pid_t clientProcessId,
94                                                pid_t clientThreadId) = 0;
95};
96
97class BnAAudioService : public BnInterface<IAAudioService> {
98public:
99    virtual status_t onTransact(uint32_t code, const Parcel& data,
100                                Parcel* reply, uint32_t flags = 0);
101
102};
103
104} /* namespace android */
105
106#endif //ANDROID_AAUDIO_IAAUDIO_SERVICE_H
107