1 /*
2 **
3 ** Copyright 2014, The Android Open Source Project
4 **
5 ** Licensed under the Apache License, Version 2.0 (the "License");
6 ** you may not use this file except in compliance with the License.
7 ** You may obtain a copy of the License at
8 **
9 ** http://www.apache.org/licenses/LICENSE-2.0
10 **
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
16 */
17
18 #define LOG_TAG "BpSoundTriggerHwService"
19 //#define LOG_NDEBUG 0
20
21 #include <utils/Log.h>
22 #include <utils/Errors.h>
23
24 #include <stdint.h>
25 #include <sys/types.h>
26 #include <binder/IMemory.h>
27 #include <binder/Parcel.h>
28 #include <binder/IPCThreadState.h>
29 #include <binder/IServiceManager.h>
30
31 #include <soundtrigger/ISoundTriggerHwService.h>
32 #include <soundtrigger/ISoundTrigger.h>
33 #include <soundtrigger/ISoundTriggerClient.h>
34
35 namespace android {
36
37 enum {
38 LIST_MODULES = IBinder::FIRST_CALL_TRANSACTION,
39 ATTACH,
40 SET_CAPTURE_STATE,
41 };
42
43 #define MAX_ITEMS_PER_LIST 1024
44
45 class BpSoundTriggerHwService: public BpInterface<ISoundTriggerHwService>
46 {
47 public:
BpSoundTriggerHwService(const sp<IBinder> & impl)48 BpSoundTriggerHwService(const sp<IBinder>& impl)
49 : BpInterface<ISoundTriggerHwService>(impl)
50 {
51 }
52
listModules(struct sound_trigger_module_descriptor * modules,uint32_t * numModules)53 virtual status_t listModules(struct sound_trigger_module_descriptor *modules,
54 uint32_t *numModules)
55 {
56 if (numModules == NULL || (*numModules != 0 && modules == NULL)) {
57 return BAD_VALUE;
58 }
59 Parcel data, reply;
60 data.writeInterfaceToken(ISoundTriggerHwService::getInterfaceDescriptor());
61 unsigned int numModulesReq = (modules == NULL) ? 0 : *numModules;
62 data.writeInt32(numModulesReq);
63 status_t status = remote()->transact(LIST_MODULES, data, &reply);
64 if (status == NO_ERROR) {
65 status = (status_t)reply.readInt32();
66 *numModules = (unsigned int)reply.readInt32();
67 }
68 ALOGV("listModules() status %d got *numModules %d", status, *numModules);
69 if (status == NO_ERROR) {
70 if (numModulesReq > *numModules) {
71 numModulesReq = *numModules;
72 }
73 if (numModulesReq > 0) {
74 reply.read(modules, numModulesReq * sizeof(struct sound_trigger_module_descriptor));
75 }
76 }
77 return status;
78 }
79
attach(const sound_trigger_module_handle_t handle,const sp<ISoundTriggerClient> & client,sp<ISoundTrigger> & module)80 virtual status_t attach(const sound_trigger_module_handle_t handle,
81 const sp<ISoundTriggerClient>& client,
82 sp<ISoundTrigger>& module)
83 {
84 Parcel data, reply;
85 data.writeInterfaceToken(ISoundTriggerHwService::getInterfaceDescriptor());
86 data.write(&handle, sizeof(sound_trigger_module_handle_t));
87 data.writeStrongBinder(IInterface::asBinder(client));
88 status_t status = remote()->transact(ATTACH, data, &reply);
89 if (status != NO_ERROR) {
90 return status;
91 }
92 status = reply.readInt32();
93 if (reply.readInt32() != 0) {
94 module = interface_cast<ISoundTrigger>(reply.readStrongBinder());
95 }
96 return status;
97 }
98
setCaptureState(bool active)99 virtual status_t setCaptureState(bool active)
100 {
101 Parcel data, reply;
102 data.writeInterfaceToken(ISoundTriggerHwService::getInterfaceDescriptor());
103 data.writeInt32(active);
104 status_t status = remote()->transact(SET_CAPTURE_STATE, data, &reply);
105 if (status == NO_ERROR) {
106 status = reply.readInt32();
107 }
108 return status;
109 }
110
111 };
112
113 IMPLEMENT_META_INTERFACE(SoundTriggerHwService, "android.hardware.ISoundTriggerHwService");
114
115 // ----------------------------------------------------------------------
116
onTransact(uint32_t code,const Parcel & data,Parcel * reply,uint32_t flags)117 status_t BnSoundTriggerHwService::onTransact(
118 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
119 {
120 switch(code) {
121 case LIST_MODULES: {
122 CHECK_INTERFACE(ISoundTriggerHwService, data, reply);
123 unsigned int numModulesReq = data.readInt32();
124 if (numModulesReq > MAX_ITEMS_PER_LIST) {
125 numModulesReq = MAX_ITEMS_PER_LIST;
126 }
127 unsigned int numModules = numModulesReq;
128 struct sound_trigger_module_descriptor *modules =
129 (struct sound_trigger_module_descriptor *)calloc(numModulesReq,
130 sizeof(struct sound_trigger_module_descriptor));
131 if (modules == NULL) {
132 reply->writeInt32(NO_MEMORY);
133 reply->writeInt32(0);
134 return NO_ERROR;
135 }
136 status_t status = listModules(modules, &numModules);
137 reply->writeInt32(status);
138 reply->writeInt32(numModules);
139 ALOGV("LIST_MODULES status %d got numModules %d", status, numModules);
140
141 if (status == NO_ERROR) {
142 if (numModulesReq > numModules) {
143 numModulesReq = numModules;
144 }
145 reply->write(modules,
146 numModulesReq * sizeof(struct sound_trigger_module_descriptor));
147 }
148 free(modules);
149 return NO_ERROR;
150 }
151
152 case ATTACH: {
153 CHECK_INTERFACE(ISoundTriggerHwService, data, reply);
154 sound_trigger_module_handle_t handle;
155 data.read(&handle, sizeof(sound_trigger_module_handle_t));
156 sp<ISoundTriggerClient> client =
157 interface_cast<ISoundTriggerClient>(data.readStrongBinder());
158 sp<ISoundTrigger> module;
159 status_t status = attach(handle, client, module);
160 reply->writeInt32(status);
161 if (module != 0) {
162 reply->writeInt32(1);
163 reply->writeStrongBinder(IInterface::asBinder(module));
164 } else {
165 reply->writeInt32(0);
166 }
167 return NO_ERROR;
168 } break;
169
170 case SET_CAPTURE_STATE: {
171 CHECK_INTERFACE(ISoundTriggerHwService, data, reply);
172 reply->writeInt32(setCaptureState((bool)data.readInt32()));
173 return NO_ERROR;
174 } break;
175
176 default:
177 return BBinder::onTransact(code, data, reply, flags);
178 }
179 }
180
181 // ----------------------------------------------------------------------------
182
183 }; // namespace android
184