IAudioPolicyService.h revision 203b1a18a806e2c56c701aac49cda963bccfad5b 
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_IAUDIOPOLICYSERVICE_H
18#define ANDROID_IAUDIOPOLICYSERVICE_H
19
20#include <stdint.h>
21#include <sys/types.h>
22#include <unistd.h>
23
24#include <utils/RefBase.h>
25#include <utils/Errors.h>
26#include <binder/IInterface.h>
27#include <media/AudioSystem.h>
28
29#include <system/audio_policy.h>
30
31namespace android {
32
33// ----------------------------------------------------------------------------
34
35class IAudioPolicyService : public IInterface
36{
37public:
38    DECLARE_META_INTERFACE(AudioPolicyService);
39
40    //
41    // IAudioPolicyService interface (see AudioPolicyInterface for method descriptions)
42    //
43    virtual status_t setDeviceConnectionState(audio_devices_t device,
44                                              audio_policy_dev_state_t state,
45                                              const char *device_address) = 0;
46    virtual audio_policy_dev_state_t getDeviceConnectionState(audio_devices_t device,
47                                                                  const char *device_address) = 0;
48    virtual status_t setPhoneState(audio_mode_t state) = 0;
49    virtual status_t setForceUse(audio_policy_force_use_t usage,
50                                    audio_policy_forced_cfg_t config) = 0;
51    virtual audio_policy_forced_cfg_t getForceUse(audio_policy_force_use_t usage) = 0;
52    virtual audio_io_handle_t getOutput(audio_stream_type_t stream,
53                                        uint32_t samplingRate = 0,
54                                        audio_format_t format = AUDIO_FORMAT_DEFAULT,
55                                        audio_channel_mask_t channelMask = 0,
56                                        audio_output_flags_t flags = AUDIO_OUTPUT_FLAG_NONE,
57                                        const audio_offload_info_t *offloadInfo = NULL) = 0;
58    virtual status_t startOutput(audio_io_handle_t output,
59                                 audio_stream_type_t stream,
60                                 int session = 0) = 0;
61    virtual status_t stopOutput(audio_io_handle_t output,
62                                audio_stream_type_t stream,
63                                int session = 0) = 0;
64    virtual void releaseOutput(audio_io_handle_t output) = 0;
65    virtual audio_io_handle_t getInput(audio_source_t inputSource,
66                                    uint32_t samplingRate = 0,
67                                    audio_format_t format = AUDIO_FORMAT_DEFAULT,
68                                    audio_channel_mask_t channelMask = 0,
69                                    int audioSession = 0) = 0;
70    virtual status_t startInput(audio_io_handle_t input) = 0;
71    virtual status_t stopInput(audio_io_handle_t input) = 0;
72    virtual void releaseInput(audio_io_handle_t input) = 0;
73    virtual status_t initStreamVolume(audio_stream_type_t stream,
74                                      int indexMin,
75                                      int indexMax) = 0;
76    virtual status_t setStreamVolumeIndex(audio_stream_type_t stream,
77                                          int index,
78                                          audio_devices_t device) = 0;
79    virtual status_t getStreamVolumeIndex(audio_stream_type_t stream,
80                                          int *index,
81                                          audio_devices_t device) = 0;
82    virtual uint32_t getStrategyForStream(audio_stream_type_t stream) = 0;
83    virtual audio_devices_t getDevicesForStream(audio_stream_type_t stream) = 0;
84    virtual audio_io_handle_t getOutputForEffect(const effect_descriptor_t *desc) = 0;
85    virtual status_t registerEffect(const effect_descriptor_t *desc,
86                                    audio_io_handle_t io,
87                                    uint32_t strategy,
88                                    int session,
89                                    int id) = 0;
90    virtual status_t unregisterEffect(int id) = 0;
91    virtual status_t setEffectEnabled(int id, bool enabled) = 0;
92    virtual bool     isStreamActive(audio_stream_type_t stream, uint32_t inPastMs = 0) const = 0;
93    virtual bool     isStreamActiveRemotely(audio_stream_type_t stream, uint32_t inPastMs = 0)
94                             const = 0;
95    virtual bool     isSourceActive(audio_source_t source) const = 0;
96    virtual status_t queryDefaultPreProcessing(int audioSession,
97                                              effect_descriptor_t *descriptors,
98                                              uint32_t *count) = 0;
99   // Check if offload is possible for given format, stream type, sample rate,
100    // bit rate, duration, video and streaming or offload property is enabled
101    virtual bool isOffloadSupported(const audio_offload_info_t& info) = 0;
102
103    /* List available audio ports and their attributes */
104    virtual status_t listAudioPorts(audio_port_role_t role,
105                                    audio_port_type_t type,
106                                    unsigned int *num_ports,
107                                    struct audio_port *ports,
108                                    unsigned int *generation) = 0;
109
110    /* Get attributes for a given audio port */
111    virtual status_t getAudioPort(struct audio_port *port) = 0;
112
113    /* Create an audio patch between several source and sink ports */
114    virtual status_t createAudioPatch(const struct audio_patch *patch,
115                                       audio_patch_handle_t *handle) = 0;
116
117    /* Release an audio patch */
118    virtual status_t releaseAudioPatch(audio_patch_handle_t handle) = 0;
119
120    /* List existing audio patches */
121    virtual status_t listAudioPatches(unsigned int *num_patches,
122                                      struct audio_patch *patches,
123                                      unsigned int *generation) = 0;
124    /* Set audio port configuration */
125    virtual status_t setAudioPortConfig(const struct audio_port_config *config) = 0;
126
127};
128
129
130// ----------------------------------------------------------------------------
131
132class BnAudioPolicyService : public BnInterface<IAudioPolicyService>
133{
134public:
135    virtual status_t    onTransact( uint32_t code,
136                                    const Parcel& data,
137                                    Parcel* reply,
138                                    uint32_t flags = 0);
139};
140
141// ----------------------------------------------------------------------------
142
143}; // namespace android
144
145#endif // ANDROID_IAUDIOPOLICYSERVICE_H
146