1 /*
2 **
3 ** Copyright 2008, 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_NDEBUG 0
19 #define LOG_TAG "ICamera"
20 #include <utils/Log.h>
21 #include <stdint.h>
22 #include <sys/types.h>
23 #include <binder/Parcel.h>
24 #include <camera/ICamera.h>
25 #include <gui/IGraphicBufferProducer.h>
26 #include <gui/Surface.h>
27
28 namespace android {
29
30 enum {
31 DISCONNECT = IBinder::FIRST_CALL_TRANSACTION,
32 SET_PREVIEW_TEXTURE,
33 SET_PREVIEW_CALLBACK_FLAG,
34 START_PREVIEW,
35 STOP_PREVIEW,
36 AUTO_FOCUS,
37 CANCEL_AUTO_FOCUS,
38 TAKE_PICTURE,
39 SET_PARAMETERS,
40 GET_PARAMETERS,
41 SEND_COMMAND,
42 CONNECT,
43 LOCK,
44 UNLOCK,
45 PREVIEW_ENABLED,
46 START_RECORDING,
47 STOP_RECORDING,
48 RECORDING_ENABLED,
49 RELEASE_RECORDING_FRAME,
50 STORE_META_DATA_IN_BUFFERS,
51 };
52
53 class BpCamera: public BpInterface<ICamera>
54 {
55 public:
BpCamera(const sp<IBinder> & impl)56 BpCamera(const sp<IBinder>& impl)
57 : BpInterface<ICamera>(impl)
58 {
59 }
60
61 // disconnect from camera service
disconnect()62 void disconnect()
63 {
64 ALOGV("disconnect");
65 Parcel data, reply;
66 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
67 remote()->transact(DISCONNECT, data, &reply);
68 }
69
70 // pass the buffered IGraphicBufferProducer to the camera service
setPreviewTexture(const sp<IGraphicBufferProducer> & bufferProducer)71 status_t setPreviewTexture(const sp<IGraphicBufferProducer>& bufferProducer)
72 {
73 ALOGV("setPreviewTexture");
74 Parcel data, reply;
75 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
76 sp<IBinder> b(bufferProducer->asBinder());
77 data.writeStrongBinder(b);
78 remote()->transact(SET_PREVIEW_TEXTURE, data, &reply);
79 return reply.readInt32();
80 }
81
82 // set the preview callback flag to affect how the received frames from
83 // preview are handled. See Camera.h for details.
setPreviewCallbackFlag(int flag)84 void setPreviewCallbackFlag(int flag)
85 {
86 ALOGV("setPreviewCallbackFlag(%d)", flag);
87 Parcel data, reply;
88 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
89 data.writeInt32(flag);
90 remote()->transact(SET_PREVIEW_CALLBACK_FLAG, data, &reply);
91 }
92
93 // start preview mode, must call setPreviewDisplay first
startPreview()94 status_t startPreview()
95 {
96 ALOGV("startPreview");
97 Parcel data, reply;
98 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
99 remote()->transact(START_PREVIEW, data, &reply);
100 return reply.readInt32();
101 }
102
103 // start recording mode, must call setPreviewDisplay first
startRecording()104 status_t startRecording()
105 {
106 ALOGV("startRecording");
107 Parcel data, reply;
108 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
109 remote()->transact(START_RECORDING, data, &reply);
110 return reply.readInt32();
111 }
112
113 // stop preview mode
stopPreview()114 void stopPreview()
115 {
116 ALOGV("stopPreview");
117 Parcel data, reply;
118 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
119 remote()->transact(STOP_PREVIEW, data, &reply);
120 }
121
122 // stop recording mode
stopRecording()123 void stopRecording()
124 {
125 ALOGV("stopRecording");
126 Parcel data, reply;
127 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
128 remote()->transact(STOP_RECORDING, data, &reply);
129 }
130
releaseRecordingFrame(const sp<IMemory> & mem)131 void releaseRecordingFrame(const sp<IMemory>& mem)
132 {
133 ALOGV("releaseRecordingFrame");
134 Parcel data, reply;
135 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
136 data.writeStrongBinder(mem->asBinder());
137 remote()->transact(RELEASE_RECORDING_FRAME, data, &reply);
138 }
139
storeMetaDataInBuffers(bool enabled)140 status_t storeMetaDataInBuffers(bool enabled)
141 {
142 ALOGV("storeMetaDataInBuffers: %s", enabled? "true": "false");
143 Parcel data, reply;
144 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
145 data.writeInt32(enabled);
146 remote()->transact(STORE_META_DATA_IN_BUFFERS, data, &reply);
147 return reply.readInt32();
148 }
149
150 // check preview state
previewEnabled()151 bool previewEnabled()
152 {
153 ALOGV("previewEnabled");
154 Parcel data, reply;
155 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
156 remote()->transact(PREVIEW_ENABLED, data, &reply);
157 return reply.readInt32();
158 }
159
160 // check recording state
recordingEnabled()161 bool recordingEnabled()
162 {
163 ALOGV("recordingEnabled");
164 Parcel data, reply;
165 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
166 remote()->transact(RECORDING_ENABLED, data, &reply);
167 return reply.readInt32();
168 }
169
170 // auto focus
autoFocus()171 status_t autoFocus()
172 {
173 ALOGV("autoFocus");
174 Parcel data, reply;
175 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
176 remote()->transact(AUTO_FOCUS, data, &reply);
177 status_t ret = reply.readInt32();
178 return ret;
179 }
180
181 // cancel focus
cancelAutoFocus()182 status_t cancelAutoFocus()
183 {
184 ALOGV("cancelAutoFocus");
185 Parcel data, reply;
186 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
187 remote()->transact(CANCEL_AUTO_FOCUS, data, &reply);
188 status_t ret = reply.readInt32();
189 return ret;
190 }
191
192 // take a picture - returns an IMemory (ref-counted mmap)
takePicture(int msgType)193 status_t takePicture(int msgType)
194 {
195 ALOGV("takePicture: 0x%x", msgType);
196 Parcel data, reply;
197 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
198 data.writeInt32(msgType);
199 remote()->transact(TAKE_PICTURE, data, &reply);
200 status_t ret = reply.readInt32();
201 return ret;
202 }
203
204 // set preview/capture parameters - key/value pairs
setParameters(const String8 & params)205 status_t setParameters(const String8& params)
206 {
207 ALOGV("setParameters");
208 Parcel data, reply;
209 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
210 data.writeString8(params);
211 remote()->transact(SET_PARAMETERS, data, &reply);
212 return reply.readInt32();
213 }
214
215 // get preview/capture parameters - key/value pairs
getParameters() const216 String8 getParameters() const
217 {
218 ALOGV("getParameters");
219 Parcel data, reply;
220 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
221 remote()->transact(GET_PARAMETERS, data, &reply);
222 return reply.readString8();
223 }
sendCommand(int32_t cmd,int32_t arg1,int32_t arg2)224 virtual status_t sendCommand(int32_t cmd, int32_t arg1, int32_t arg2)
225 {
226 ALOGV("sendCommand");
227 Parcel data, reply;
228 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
229 data.writeInt32(cmd);
230 data.writeInt32(arg1);
231 data.writeInt32(arg2);
232 remote()->transact(SEND_COMMAND, data, &reply);
233 return reply.readInt32();
234 }
connect(const sp<ICameraClient> & cameraClient)235 virtual status_t connect(const sp<ICameraClient>& cameraClient)
236 {
237 Parcel data, reply;
238 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
239 data.writeStrongBinder(cameraClient->asBinder());
240 remote()->transact(CONNECT, data, &reply);
241 return reply.readInt32();
242 }
lock()243 virtual status_t lock()
244 {
245 Parcel data, reply;
246 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
247 remote()->transact(LOCK, data, &reply);
248 return reply.readInt32();
249 }
unlock()250 virtual status_t unlock()
251 {
252 Parcel data, reply;
253 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
254 remote()->transact(UNLOCK, data, &reply);
255 return reply.readInt32();
256 }
257 };
258
259 IMPLEMENT_META_INTERFACE(Camera, "android.hardware.ICamera");
260
261 // ----------------------------------------------------------------------
262
onTransact(uint32_t code,const Parcel & data,Parcel * reply,uint32_t flags)263 status_t BnCamera::onTransact(
264 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
265 {
266 switch(code) {
267 case DISCONNECT: {
268 ALOGV("DISCONNECT");
269 CHECK_INTERFACE(ICamera, data, reply);
270 disconnect();
271 return NO_ERROR;
272 } break;
273 case SET_PREVIEW_TEXTURE: {
274 ALOGV("SET_PREVIEW_TEXTURE");
275 CHECK_INTERFACE(ICamera, data, reply);
276 sp<IGraphicBufferProducer> st =
277 interface_cast<IGraphicBufferProducer>(data.readStrongBinder());
278 reply->writeInt32(setPreviewTexture(st));
279 return NO_ERROR;
280 } break;
281 case SET_PREVIEW_CALLBACK_FLAG: {
282 ALOGV("SET_PREVIEW_CALLBACK_TYPE");
283 CHECK_INTERFACE(ICamera, data, reply);
284 int callback_flag = data.readInt32();
285 setPreviewCallbackFlag(callback_flag);
286 return NO_ERROR;
287 } break;
288 case START_PREVIEW: {
289 ALOGV("START_PREVIEW");
290 CHECK_INTERFACE(ICamera, data, reply);
291 reply->writeInt32(startPreview());
292 return NO_ERROR;
293 } break;
294 case START_RECORDING: {
295 ALOGV("START_RECORDING");
296 CHECK_INTERFACE(ICamera, data, reply);
297 reply->writeInt32(startRecording());
298 return NO_ERROR;
299 } break;
300 case STOP_PREVIEW: {
301 ALOGV("STOP_PREVIEW");
302 CHECK_INTERFACE(ICamera, data, reply);
303 stopPreview();
304 return NO_ERROR;
305 } break;
306 case STOP_RECORDING: {
307 ALOGV("STOP_RECORDING");
308 CHECK_INTERFACE(ICamera, data, reply);
309 stopRecording();
310 return NO_ERROR;
311 } break;
312 case RELEASE_RECORDING_FRAME: {
313 ALOGV("RELEASE_RECORDING_FRAME");
314 CHECK_INTERFACE(ICamera, data, reply);
315 sp<IMemory> mem = interface_cast<IMemory>(data.readStrongBinder());
316 releaseRecordingFrame(mem);
317 return NO_ERROR;
318 } break;
319 case STORE_META_DATA_IN_BUFFERS: {
320 ALOGV("STORE_META_DATA_IN_BUFFERS");
321 CHECK_INTERFACE(ICamera, data, reply);
322 bool enabled = data.readInt32();
323 reply->writeInt32(storeMetaDataInBuffers(enabled));
324 return NO_ERROR;
325 } break;
326 case PREVIEW_ENABLED: {
327 ALOGV("PREVIEW_ENABLED");
328 CHECK_INTERFACE(ICamera, data, reply);
329 reply->writeInt32(previewEnabled());
330 return NO_ERROR;
331 } break;
332 case RECORDING_ENABLED: {
333 ALOGV("RECORDING_ENABLED");
334 CHECK_INTERFACE(ICamera, data, reply);
335 reply->writeInt32(recordingEnabled());
336 return NO_ERROR;
337 } break;
338 case AUTO_FOCUS: {
339 ALOGV("AUTO_FOCUS");
340 CHECK_INTERFACE(ICamera, data, reply);
341 reply->writeInt32(autoFocus());
342 return NO_ERROR;
343 } break;
344 case CANCEL_AUTO_FOCUS: {
345 ALOGV("CANCEL_AUTO_FOCUS");
346 CHECK_INTERFACE(ICamera, data, reply);
347 reply->writeInt32(cancelAutoFocus());
348 return NO_ERROR;
349 } break;
350 case TAKE_PICTURE: {
351 ALOGV("TAKE_PICTURE");
352 CHECK_INTERFACE(ICamera, data, reply);
353 int msgType = data.readInt32();
354 reply->writeInt32(takePicture(msgType));
355 return NO_ERROR;
356 } break;
357 case SET_PARAMETERS: {
358 ALOGV("SET_PARAMETERS");
359 CHECK_INTERFACE(ICamera, data, reply);
360 String8 params(data.readString8());
361 reply->writeInt32(setParameters(params));
362 return NO_ERROR;
363 } break;
364 case GET_PARAMETERS: {
365 ALOGV("GET_PARAMETERS");
366 CHECK_INTERFACE(ICamera, data, reply);
367 reply->writeString8(getParameters());
368 return NO_ERROR;
369 } break;
370 case SEND_COMMAND: {
371 ALOGV("SEND_COMMAND");
372 CHECK_INTERFACE(ICamera, data, reply);
373 int command = data.readInt32();
374 int arg1 = data.readInt32();
375 int arg2 = data.readInt32();
376 reply->writeInt32(sendCommand(command, arg1, arg2));
377 return NO_ERROR;
378 } break;
379 case CONNECT: {
380 CHECK_INTERFACE(ICamera, data, reply);
381 sp<ICameraClient> cameraClient = interface_cast<ICameraClient>(data.readStrongBinder());
382 reply->writeInt32(connect(cameraClient));
383 return NO_ERROR;
384 } break;
385 case LOCK: {
386 CHECK_INTERFACE(ICamera, data, reply);
387 reply->writeInt32(lock());
388 return NO_ERROR;
389 } break;
390 case UNLOCK: {
391 CHECK_INTERFACE(ICamera, data, reply);
392 reply->writeInt32(unlock());
393 return NO_ERROR;
394 } break;
395 default:
396 return BBinder::onTransact(code, data, reply, flags);
397 }
398 }
399
400 // ----------------------------------------------------------------------------
401
402 }; // namespace android
403