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/AAudioCommon.h"
28#include "binding/AAudioServiceDefinitions.h"
29#include "binding/AAudioStreamConfiguration.h"
30#include "binding/AAudioStreamRequest.h"
31#include "binding/AudioEndpointParcelable.h"
32#include "binding/IAAudioClient.h"
33
34namespace android {
35
36#define AAUDIO_SERVICE_NAME  "media.aaudio"
37
38// Interface (our AIDL) - service methods called by client
39class IAAudioService : public IInterface {
40public:
41
42    DECLARE_META_INTERFACE(AAudioService);
43
44    // Register an object to receive audio input/output change and track notifications.
45    // For a given calling pid, AAudio service disregards any registrations after the first.
46    // Thus the IAAudioClient must be a singleton per process.
47    virtual void registerClient(const sp<IAAudioClient>& client) = 0;
48
49    /**
50     * @param request info needed to create the stream
51     * @param configuration contains information about the created stream
52     * @return handle to the stream or a negative error
53     */
54    virtual aaudio::aaudio_handle_t openStream(const aaudio::AAudioStreamRequest &request,
55                                     aaudio::AAudioStreamConfiguration &configurationOutput) = 0;
56
57    virtual aaudio_result_t closeStream(aaudio::aaudio_handle_t streamHandle) = 0;
58
59    /* Get an immutable description of the in-memory queues
60    * used to communicate with the underlying HAL or Service.
61    */
62    virtual aaudio_result_t getStreamDescription(aaudio::aaudio_handle_t streamHandle,
63                                               aaudio::AudioEndpointParcelable &parcelable) = 0;
64
65    /**
66     * Start the flow of data.
67     * This is asynchronous. When complete, the service will send a STARTED event.
68     */
69    virtual aaudio_result_t startStream(aaudio::aaudio_handle_t streamHandle) = 0;
70
71    /**
72     * Stop the flow of data such that start() can resume without loss of data.
73     * This is asynchronous. When complete, the service will send a PAUSED event.
74     */
75    virtual aaudio_result_t pauseStream(aaudio::aaudio_handle_t streamHandle) = 0;
76
77    /**
78     * Stop the flow of data such that the data currently in the buffer is played.
79     * This is asynchronous. When complete, the service will send a STOPPED event.
80     */
81    virtual aaudio_result_t stopStream(aaudio::aaudio_handle_t streamHandle) = 0;
82
83    /**
84     *  Discard any data held by the underlying HAL or Service.
85     * This is asynchronous. When complete, the service will send a FLUSHED event.
86     */
87    virtual aaudio_result_t flushStream(aaudio::aaudio_handle_t streamHandle) = 0;
88
89    /**
90     * Manage the specified thread as a low latency audio thread.
91     */
92    virtual aaudio_result_t registerAudioThread(aaudio::aaudio_handle_t streamHandle,
93                                              pid_t clientThreadId,
94                                              int64_t periodNanoseconds) = 0;
95
96    virtual aaudio_result_t unregisterAudioThread(aaudio::aaudio_handle_t streamHandle,
97                                                pid_t clientThreadId) = 0;
98};
99
100class BnAAudioService : public BnInterface<IAAudioService> {
101public:
102    virtual status_t onTransact(uint32_t code, const Parcel& data,
103                                Parcel* reply, uint32_t flags = 0);
104
105};
106
107} /* namespace android */
108
109#endif //ANDROID_AAUDIO_IAAUDIO_SERVICE_H
110