Gitiles
Code Review Sign In
review.blissroms.org / platform_frameworks_native / 3b2734f443d2799717e8b2b1847c8e2841764582 / . / libs / audioflinger / AudioPolicyService.h
blob: 1c469751ea449e97fb4a1f1f0d17fb94c17e992d [file] [log] [blame]
Eric Laurent9d91ad52009-07-17 12:17:14 -0700[diff] [blame]1/*
2 * Copyright (C) 2009 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_AUDIOPOLICYSERVICE_H
18#define ANDROID_AUDIOPOLICYSERVICE_H
19
20#include <media/IAudioPolicyService.h>
21#include <hardware_legacy/AudioPolicyInterface.h>
22#include <media/ToneGenerator.h>
23
24namespace android {
25
26class String8;
27
28// ----------------------------------------------------------------------------
29
30class AudioPolicyService: public BnAudioPolicyService, public AudioPolicyClientInterface, public IBinder::DeathRecipient
31{
32
33public:
34 static void instantiate();
35
36 virtual status_t dump(int fd, const Vector<String16>& args);
37
38 //
39 // BnAudioPolicyService (see AudioPolicyInterface for method descriptions)
40 //
41
42 virtual status_t setDeviceConnectionState(AudioSystem::audio_devices device,
43 AudioSystem::device_connection_state state,
44 const char *device_address);
45 virtual AudioSystem::device_connection_state getDeviceConnectionState(AudioSystem::audio_devices device,
46 const char *device_address);
47 virtual status_t setPhoneState(int state);
48 virtual status_t setRingerMode(uint32_t mode, uint32_t mask);
49 virtual status_t setForceUse(AudioSystem::force_use usage, AudioSystem::forced_config config);
50 virtual AudioSystem::forced_config getForceUse(AudioSystem::force_use usage);
51 virtual audio_io_handle_t getOutput(AudioSystem::stream_type stream,
52 uint32_t samplingRate = 0,
53 uint32_t format = AudioSystem::FORMAT_DEFAULT,
54 uint32_t channels = 0,
55 AudioSystem::output_flags flags = AudioSystem::OUTPUT_FLAG_INDIRECT);
56 virtual status_t startOutput(audio_io_handle_t output, AudioSystem::stream_type stream);
57 virtual status_t stopOutput(audio_io_handle_t output, AudioSystem::stream_type stream);
58 virtual void releaseOutput(audio_io_handle_t output);
59 virtual audio_io_handle_t getInput(int inputSource,
60 uint32_t samplingRate = 0,
61 uint32_t format = AudioSystem::FORMAT_DEFAULT,
62 uint32_t channels = 0,
63 AudioSystem::audio_in_acoustics acoustics = (AudioSystem::audio_in_acoustics)0);
64 virtual status_t startInput(audio_io_handle_t input);
65 virtual status_t stopInput(audio_io_handle_t input);
66 virtual void releaseInput(audio_io_handle_t input);
67 virtual status_t initStreamVolume(AudioSystem::stream_type stream,
68 int indexMin,
69 int indexMax);
70 virtual status_t setStreamVolumeIndex(AudioSystem::stream_type stream, int index);
71 virtual status_t getStreamVolumeIndex(AudioSystem::stream_type stream, int *index);
72
73 virtual status_t onTransact(
74 uint32_t code,
75 const Parcel& data,
76 Parcel* reply,
77 uint32_t flags);
78
79 // IBinder::DeathRecipient
80 virtual void binderDied(const wp<IBinder>& who);
81
82 //
83 // AudioPolicyClientInterface
84 //
85 virtual audio_io_handle_t openOutput(uint32_t *pDevices,
86 uint32_t *pSamplingRate,
87 uint32_t *pFormat,
88 uint32_t *pChannels,
89 uint32_t *pLatencyMs,
90 AudioSystem::output_flags flags);
91 virtual audio_io_handle_t openDuplicateOutput(audio_io_handle_t output1, audio_io_handle_t output2);
92 virtual status_t closeOutput(audio_io_handle_t output);
93 virtual status_t suspendOutput(audio_io_handle_t output);
94 virtual status_t restoreOutput(audio_io_handle_t output);
95 virtual audio_io_handle_t openInput(uint32_t *pDevices,
96 uint32_t *pSamplingRate,
97 uint32_t *pFormat,
98 uint32_t *pChannels,
99 uint32_t acoustics);
100 virtual status_t closeInput(audio_io_handle_t input);
101 virtual status_t setStreamVolume(AudioSystem::stream_type stream, float volume, audio_io_handle_t output);
102 virtual status_t setStreamOutput(AudioSystem::stream_type stream, audio_io_handle_t output);
103 virtual void setParameters(audio_io_handle_t ioHandle, const String8& keyValuePairs);
104 virtual String8 getParameters(audio_io_handle_t ioHandle, const String8& keys);
105 virtual status_t startTone(ToneGenerator::tone_type tone, AudioSystem::stream_type stream);
106 virtual status_t stopTone();
107
108private:
109 AudioPolicyService();
110 virtual ~AudioPolicyService();
111
Eric Laurent9d91ad52009-07-17 12:17:14 -0700[diff] [blame]112 // Thread used for tone playback and to send audio config commands to audio flinger
113 // For tone playback, using a separate thread is necessary to avoid deadlock with mLock because startTone()
114 // and stopTone() are normally called with mLock locked and requesting a tone start or stop will cause
115 // calls to AudioPolicyService and an attempt to lock mLock.
116 // For audio config commands, it is necessary because audio flinger requires that the calling process (user)
117 // has permission to modify audio settings.
118 class AudioCommandThread : public Thread {
119 public:
120
121 // commands for tone AudioCommand
122 enum {
123 START_TONE,
124 STOP_TONE,
125 SET_VOLUME,
126 SET_PARAMETERS
127 };
128
129 AudioCommandThread ();
130 virtual ~AudioCommandThread();
131
132 // Thread virtuals
133 virtual void onFirstRef();
134 virtual bool threadLoop();
135
136 void exit();
137 void startToneCommand(int type = 0, int stream = 0);
138 void stopToneCommand();
139 status_t volumeCommand(int stream, float volume, void *output);
140 status_t parametersCommand(void *ioHandle, const String8& keyValuePairs);
141
142 private:
143 // descriptor for requested tone playback event
144 class AudioCommand {
145 public:
146 int mCommand; // START_TONE, STOP_TONE ...
147 void *mParam;
148 };
149
150 class ToneData {
151 public:
152 int mType; // tone type (START_TONE only)
153 int mStream; // stream type (START_TONE only)
154 };
155
156 class VolumeData {
157 public:
158 int mStream;
159 float mVolume;
160 void *mIO;
161 };
162 class ParametersData {
163 public:
164 void *mIO;
165 String8 mKeyValuePairs;
166 };
167
168
169 Mutex mLock;
170 Condition mWaitWorkCV;
171 Vector<AudioCommand *> mAudioCommands; // list of pending tone events
172 Condition mCommandCond;
173 status_t mCommandStatus;
174 ToneGenerator *mpToneGenerator; // the tone generator
175 };
176
177 // Internal dump utilities.
178 status_t dumpPermissionDenial(int fd, const Vector<String16>& args);
179
180
181 Mutex mLock; // prevents concurrent access to AudioPolicy manager functions changing device
182 // connection stated our routing
183 AudioPolicyInterface* mpPolicyManager; // the platform specific policy manager
184 sp <AudioCommandThread> mAudioCommandThread; // audio commands thread
185 sp <AudioCommandThread> mTonePlaybacThread; // tone playback thread
Eric Laurent9d91ad52009-07-17 12:17:14 -0700[diff] [blame]186};
187
188}; // namespace android
189
190#endif // ANDROID_AUDIOPOLICYSERVICE_H
191
192
193
194
195
196
197
198