IAudioPolicyService.h revision 4dc680607181e6a76f4e91a39366c4f5dfb7b03e 
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#include <media/IAudioPolicyServiceClient.h>
29
30#include <system/audio_policy.h>
31
32namespace android {
33
34// ----------------------------------------------------------------------------
35
36class IAudioPolicyService : public IInterface
37{
38public:
39    DECLARE_META_INTERFACE(AudioPolicyService);
40
41    //
42    // IAudioPolicyService interface (see AudioPolicyInterface for method descriptions)
43    //
44    virtual status_t setDeviceConnectionState(audio_devices_t device,
45                                              audio_policy_dev_state_t state,
46                                              const char *device_address) = 0;
47    virtual audio_policy_dev_state_t getDeviceConnectionState(audio_devices_t device,
48                                                                  const char *device_address) = 0;
49    virtual status_t setPhoneState(audio_mode_t state) = 0;
50    virtual status_t setForceUse(audio_policy_force_use_t usage,
51                                    audio_policy_forced_cfg_t config) = 0;
52    virtual audio_policy_forced_cfg_t getForceUse(audio_policy_force_use_t usage) = 0;
53    virtual audio_io_handle_t getOutput(audio_stream_type_t stream,
54                                        uint32_t samplingRate = 0,
55                                        audio_format_t format = AUDIO_FORMAT_DEFAULT,
56                                        audio_channel_mask_t channelMask = 0,
57                                        audio_output_flags_t flags = AUDIO_OUTPUT_FLAG_NONE,
58                                        const audio_offload_info_t *offloadInfo = NULL) = 0;
59    virtual audio_io_handle_t getOutputForAttr(const audio_attributes_t *attr,
60                                            uint32_t samplingRate = 0,
61                                            audio_format_t format = AUDIO_FORMAT_DEFAULT,
62                                            audio_channel_mask_t channelMask = 0,
63                                            audio_output_flags_t flags = AUDIO_OUTPUT_FLAG_NONE,
64                                            const audio_offload_info_t *offloadInfo = NULL) = 0;
65    virtual status_t startOutput(audio_io_handle_t output,
66                                 audio_stream_type_t stream,
67                                 int session = 0) = 0;
68    virtual status_t stopOutput(audio_io_handle_t output,
69                                audio_stream_type_t stream,
70                                int session = 0) = 0;
71    virtual void releaseOutput(audio_io_handle_t output) = 0;
72    virtual audio_io_handle_t getInput(audio_source_t inputSource,
73                                    uint32_t samplingRate,
74                                    audio_format_t format,
75                                    audio_channel_mask_t channelMask,
76                                    int audioSession,
77                                    audio_input_flags_t flags) = 0;
78    virtual status_t startInput(audio_io_handle_t input,
79                                audio_session_t session) = 0;
80    virtual status_t stopInput(audio_io_handle_t input,
81                               audio_session_t session) = 0;
82    virtual void releaseInput(audio_io_handle_t input,
83                              audio_session_t session) = 0;
84    virtual status_t initStreamVolume(audio_stream_type_t stream,
85                                      int indexMin,
86                                      int indexMax) = 0;
87    virtual status_t setStreamVolumeIndex(audio_stream_type_t stream,
88                                          int index,
89                                          audio_devices_t device) = 0;
90    virtual status_t getStreamVolumeIndex(audio_stream_type_t stream,
91                                          int *index,
92                                          audio_devices_t device) = 0;
93    virtual uint32_t getStrategyForStream(audio_stream_type_t stream) = 0;
94    virtual audio_devices_t getDevicesForStream(audio_stream_type_t stream) = 0;
95    virtual audio_io_handle_t getOutputForEffect(const effect_descriptor_t *desc) = 0;
96    virtual status_t registerEffect(const effect_descriptor_t *desc,
97                                    audio_io_handle_t io,
98                                    uint32_t strategy,
99                                    int session,
100                                    int id) = 0;
101    virtual status_t unregisterEffect(int id) = 0;
102    virtual status_t setEffectEnabled(int id, bool enabled) = 0;
103    virtual bool     isStreamActive(audio_stream_type_t stream, uint32_t inPastMs = 0) const = 0;
104    virtual bool     isStreamActiveRemotely(audio_stream_type_t stream, uint32_t inPastMs = 0)
105                             const = 0;
106    virtual bool     isSourceActive(audio_source_t source) const = 0;
107    virtual status_t queryDefaultPreProcessing(int audioSession,
108                                              effect_descriptor_t *descriptors,
109                                              uint32_t *count) = 0;
110   // Check if offload is possible for given format, stream type, sample rate,
111    // bit rate, duration, video and streaming or offload property is enabled
112    virtual bool isOffloadSupported(const audio_offload_info_t& info) = 0;
113
114    /* List available audio ports and their attributes */
115    virtual status_t listAudioPorts(audio_port_role_t role,
116                                    audio_port_type_t type,
117                                    unsigned int *num_ports,
118                                    struct audio_port *ports,
119                                    unsigned int *generation) = 0;
120
121    /* Get attributes for a given audio port */
122    virtual status_t getAudioPort(struct audio_port *port) = 0;
123
124    /* Create an audio patch between several source and sink ports */
125    virtual status_t createAudioPatch(const struct audio_patch *patch,
126                                       audio_patch_handle_t *handle) = 0;
127
128    /* Release an audio patch */
129    virtual status_t releaseAudioPatch(audio_patch_handle_t handle) = 0;
130
131    /* List existing audio patches */
132    virtual status_t listAudioPatches(unsigned int *num_patches,
133                                      struct audio_patch *patches,
134                                      unsigned int *generation) = 0;
135    /* Set audio port configuration */
136    virtual status_t setAudioPortConfig(const struct audio_port_config *config) = 0;
137
138    virtual void registerClient(const sp<IAudioPolicyServiceClient>& client) = 0;
139};
140
141
142// ----------------------------------------------------------------------------
143
144class BnAudioPolicyService : public BnInterface<IAudioPolicyService>
145{
146public:
147    virtual status_t    onTransact( uint32_t code,
148                                    const Parcel& data,
149                                    Parcel* reply,
150                                    uint32_t flags = 0);
151};
152
153// ----------------------------------------------------------------------------
154
155}; // namespace android
156
157#endif // ANDROID_IAUDIOPOLICYSERVICE_H
158