AAudioServiceMessage.h revision a4eb0d86a29be2763be5fac51727858d5095794b 
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 AAUDIO_AAUDIO_SERVICE_MESSAGE_H
18#define AAUDIO_AAUDIO_SERVICE_MESSAGE_H
19
20#include <stdint.h>
21
22#include <aaudio/AAudio.h>
23
24namespace aaudio {
25
26// TODO move this to an "include" folder for the service.
27
28// Used to send information about the HAL to the client.
29struct AAudioMessageTimestamp {
30    int64_t position;     // number of frames transferred so far
31    int64_t deviceOffset; // add to client position to get device position
32    int64_t timestamp;    // time when that position was reached
33};
34
35typedef enum aaudio_service_event_e : uint32_t {
36    AAUDIO_SERVICE_EVENT_STARTED,
37    AAUDIO_SERVICE_EVENT_PAUSED,
38    AAUDIO_SERVICE_EVENT_FLUSHED,
39    AAUDIO_SERVICE_EVENT_CLOSED,
40    AAUDIO_SERVICE_EVENT_DISCONNECTED,
41    AAUDIO_SERVICE_EVENT_VOLUME
42} aaudio_service_event_t;
43
44struct AAudioMessageEvent {
45    aaudio_service_event_t event;
46    double                 dataDouble;
47    int64_t                dataLong;
48};
49
50typedef struct AAudioServiceMessage_s {
51    enum class code : uint32_t {
52        NOTHING,
53        TIMESTAMP,
54        EVENT,
55    };
56
57    code what;
58    union {
59        AAudioMessageTimestamp timestamp; // what == TIMESTAMP
60        AAudioMessageEvent event;         // what == EVENT
61    };
62} AAudioServiceMessage;
63
64} /* namespace aaudio */
65
66#endif //AAUDIO_AAUDIO_SERVICE_MESSAGE_H
67