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review.evervolv.com / android_frameworks_av / 89fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5 / . / include / media / AudioSystem.h
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The Android Open Source Project89fa4ad2009-03-03 19:31:44 -0800[diff] [blame^]1/*
2 * Copyright (C) 2008 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_AUDIOSYSTEM_H_
18#define ANDROID_AUDIOSYSTEM_H_
19
20#include <utils/RefBase.h>
21#include <utils/threads.h>
22#include <media/IAudioFlinger.h>
23
24namespace android {
25
26typedef void (*audio_error_callback)(status_t err);
27
28class AudioSystem
29{
30public:
31
32 enum stream_type {
33 DEFAULT =-1,
34 VOICE_CALL = 0,
35 SYSTEM = 1,
36 RING = 2,
37 MUSIC = 3,
38 ALARM = 4,
39 NOTIFICATION = 5,
40 BLUETOOTH_SCO = 6,
41 NUM_STREAM_TYPES
42 };
43
44 enum audio_output_type {
45 AUDIO_OUTPUT_DEFAULT =-1,
46 AUDIO_OUTPUT_HARDWARE = 0,
47 AUDIO_OUTPUT_A2DP = 1,
48 NUM_AUDIO_OUTPUT_TYPES
49 };
50
51 enum audio_format {
52 FORMAT_DEFAULT = 0,
53 PCM_16_BIT,
54 PCM_8_BIT,
55 INVALID_FORMAT
56 };
57
58 enum audio_mode {
59 MODE_INVALID = -2,
60 MODE_CURRENT = -1,
61 MODE_NORMAL = 0,
62 MODE_RINGTONE,
63 MODE_IN_CALL,
64 NUM_MODES // not a valid entry, denotes end-of-list
65 };
66
67 enum audio_routes {
68 ROUTE_EARPIECE = (1 << 0),
69 ROUTE_SPEAKER = (1 << 1),
70 ROUTE_BLUETOOTH_SCO = (1 << 2),
71 ROUTE_HEADSET = (1 << 3),
72 ROUTE_BLUETOOTH_A2DP = (1 << 4),
73 ROUTE_ALL = -1UL,
74 };
75
76 enum audio_in_acoustics {
77 AGC_ENABLE = 0x0001,
78 AGC_DISABLE = 0,
79 NS_ENABLE = 0x0002,
80 NS_DISABLE = 0,
81 TX_IIR_ENABLE = 0x0004,
82 TX_DISABLE = 0
83 };
84
85 /* These are static methods to control the system-wide AudioFlinger
86 * only privileged processes can have access to them
87 */
88
89 // routing helper functions
90 static status_t speakerphone(bool state);
91 static status_t isSpeakerphoneOn(bool* state);
92 static status_t bluetoothSco(bool state);
93 static status_t isBluetoothScoOn(bool* state);
94 static status_t muteMicrophone(bool state);
95 static status_t isMicrophoneMuted(bool *state);
96
97 static status_t setMasterVolume(float value);
98 static status_t setMasterMute(bool mute);
99 static status_t getMasterVolume(float* volume);
100 static status_t getMasterMute(bool* mute);
101
102 static status_t setStreamVolume(int stream, float value);
103 static status_t setStreamMute(int stream, bool mute);
104 static status_t getStreamVolume(int stream, float* volume);
105 static status_t getStreamMute(int stream, bool* mute);
106
107 static status_t setMode(int mode);
108 static status_t getMode(int* mode);
109
110 static status_t setRouting(int mode, uint32_t routes, uint32_t mask);
111 static status_t getRouting(int mode, uint32_t* routes);
112
113 static status_t isMusicActive(bool *state);
114
115 // Temporary interface, do not use
116 // TODO: Replace with a more generic key:value get/set mechanism
117 static status_t setParameter(const char* key, const char* value);
118
119 static void setErrorCallback(audio_error_callback cb);
120
121 // helper function to obtain AudioFlinger service handle
122 static const sp<IAudioFlinger>& get_audio_flinger();
123
124 static float linearToLog(int volume);
125 static int logToLinear(float volume);
126
127 static status_t getOutputSamplingRate(int* samplingRate, int stream = DEFAULT);
128 static status_t getOutputFrameCount(int* frameCount, int stream = DEFAULT);
129 static status_t getOutputLatency(uint32_t* latency, int stream = DEFAULT);
130
131 static bool routedToA2dpOutput(int streamType);
132
133 static status_t getInputBufferSize(uint32_t sampleRate, int format, int channelCount,
134 size_t* buffSize);
135
136 // ----------------------------------------------------------------------------
137
138private:
139
140 class AudioFlingerClient: public IBinder::DeathRecipient, public BnAudioFlingerClient
141 {
142 public:
143 AudioFlingerClient() {
144 }
145
146 // DeathRecipient
147 virtual void binderDied(const wp<IBinder>& who);
148
149 // IAudioFlingerClient
150 virtual void a2dpEnabledChanged(bool enabled);
151
152 };
153 static int getOutput(int streamType);
154
155 static sp<AudioFlingerClient> gAudioFlingerClient;
156
157 friend class AudioFlingerClient;
158
159 static Mutex gLock;
160 static sp<IAudioFlinger> gAudioFlinger;
161 static audio_error_callback gAudioErrorCallback;
162 static int gOutSamplingRate[NUM_AUDIO_OUTPUT_TYPES];
163 static int gOutFrameCount[NUM_AUDIO_OUTPUT_TYPES];
164 static uint32_t gOutLatency[NUM_AUDIO_OUTPUT_TYPES];
165 static bool gA2dpEnabled;
166
167 static size_t gInBuffSize;
168 // previous parameters for recording buffer size queries
169 static uint32_t gPrevInSamplingRate;
170 static int gPrevInFormat;
171 static int gPrevInChannelCount;
172
173};
174
175}; // namespace android
176
177#endif /*ANDROID_AUDIOSYSTEM_H_*/