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The Android Open Source Project9066cfe2009-03-03 19:31:44 -08001/*
2 * Copyright (C) 2007 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_IAUDIOTRACK_H
18#define ANDROID_IAUDIOTRACK_H
19
20#include <stdint.h>
21#include <sys/types.h>
22
23#include <utils/RefBase.h>
24#include <utils/Errors.h>
Mathias Agopian07952722009-05-19 19:08:10 -070025#include <binder/IInterface.h>
26#include <binder/IMemory.h>
The Android Open Source Project9066cfe2009-03-03 19:31:44 -080027
28
29namespace android {
30
31// ----------------------------------------------------------------------------
32
33class IAudioTrack : public IInterface
34{
35public:
36 DECLARE_META_INTERFACE(AudioTrack);
37
38 /* After it's created the track is not active. Call start() to
39 * make it active. If set, the callback will start being called.
40 */
41 virtual status_t start() = 0;
42
43 /* Stop a track. If set, the callback will cease being called and
44 * obtainBuffer will return an error. Buffers that are already released
45 * will be processed, unless flush() is called.
46 */
47 virtual void stop() = 0;
48
49 /* flush a stopped track. All pending buffers are discarded.
50 * This function has no effect if the track is not stoped.
51 */
52 virtual void flush() = 0;
53
54 /* mute or unmutes this track.
55 * While mutted, the callback, if set, is still called.
56 */
57 virtual void mute(bool) = 0;
58
59 /* Pause a track. If set, the callback will cease being called and
60 * obtainBuffer will return an error. Buffers that are already released
61 * will be processed, unless flush() is called.
62 */
63 virtual void pause() = 0;
64
Eric Laurent65b65452010-06-01 23:49:17 -070065 /* Attach track auxiliary output to specified effect. Use effectId = 0
66 * to detach track from effect.
67 */
68 virtual status_t attachAuxEffect(int effectId) = 0;
69
The Android Open Source Project9066cfe2009-03-03 19:31:44 -080070 /* get this tracks control block */
71 virtual sp<IMemory> getCblk() const = 0;
72};
73
74// ----------------------------------------------------------------------------
75
76class BnAudioTrack : public BnInterface<IAudioTrack>
77{
78public:
79 virtual status_t onTransact( uint32_t code,
80 const Parcel& data,
81 Parcel* reply,
82 uint32_t flags = 0);
83};
84
85// ----------------------------------------------------------------------------
86
87}; // namespace android
88
89#endif // ANDROID_IAUDIOTRACK_H