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/CameraUtils.h>
25 #include <android/hardware/ICamera.h>
26 #include <android/hardware/ICameraClient.h>
27 #include <gui/IGraphicBufferProducer.h>
28 #include <gui/Surface.h>
29 #include <media/hardware/HardwareAPI.h>
30
31 namespace android {
32 namespace hardware {
33
34 enum {
35 DISCONNECT = IBinder::FIRST_CALL_TRANSACTION,
36 SET_PREVIEW_TARGET,
37 SET_PREVIEW_CALLBACK_FLAG,
38 SET_PREVIEW_CALLBACK_TARGET,
39 START_PREVIEW,
40 STOP_PREVIEW,
41 AUTO_FOCUS,
42 CANCEL_AUTO_FOCUS,
43 TAKE_PICTURE,
44 SET_PARAMETERS,
45 GET_PARAMETERS,
46 SEND_COMMAND,
47 CONNECT,
48 LOCK,
49 UNLOCK,
50 PREVIEW_ENABLED,
51 START_RECORDING,
52 STOP_RECORDING,
53 RECORDING_ENABLED,
54 RELEASE_RECORDING_FRAME,
55 SET_VIDEO_BUFFER_MODE,
56 SET_VIDEO_BUFFER_TARGET,
57 RELEASE_RECORDING_FRAME_HANDLE,
58 RELEASE_RECORDING_FRAME_HANDLE_BATCH,
59 SET_AUDIO_RESTRICTION,
60 GET_GLOBAL_AUDIO_RESTRICTION,
61 };
62
63 class BpCamera: public BpInterface<ICamera>
64 {
65 public:
BpCamera(const sp<IBinder> & impl)66 explicit BpCamera(const sp<IBinder>& impl)
67 : BpInterface<ICamera>(impl)
68 {
69 }
70
71 // disconnect from camera service
disconnect()72 binder::Status disconnect()
73 {
74 ALOGV("disconnect");
75 Parcel data, reply;
76 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
77 remote()->transact(DISCONNECT, data, &reply);
78 reply.readExceptionCode();
79 return binder::Status::ok();
80 }
81
82 // pass the buffered IGraphicBufferProducer to the camera service
setPreviewTarget(const sp<IGraphicBufferProducer> & bufferProducer)83 status_t setPreviewTarget(const sp<IGraphicBufferProducer>& bufferProducer)
84 {
85 ALOGV("setPreviewTarget");
86 Parcel data, reply;
87 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
88 sp<IBinder> b(IInterface::asBinder(bufferProducer));
89 data.writeStrongBinder(b);
90 remote()->transact(SET_PREVIEW_TARGET, data, &reply);
91 return reply.readInt32();
92 }
93
94 // set the preview callback flag to affect how the received frames from
95 // preview are handled. See Camera.h for details.
setPreviewCallbackFlag(int flag)96 void setPreviewCallbackFlag(int flag)
97 {
98 ALOGV("setPreviewCallbackFlag(%d)", flag);
99 Parcel data, reply;
100 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
101 data.writeInt32(flag);
102 remote()->transact(SET_PREVIEW_CALLBACK_FLAG, data, &reply);
103 }
104
setPreviewCallbackTarget(const sp<IGraphicBufferProducer> & callbackProducer)105 status_t setPreviewCallbackTarget(
106 const sp<IGraphicBufferProducer>& callbackProducer)
107 {
108 ALOGV("setPreviewCallbackTarget");
109 Parcel data, reply;
110 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
111 sp<IBinder> b(IInterface::asBinder(callbackProducer));
112 data.writeStrongBinder(b);
113 remote()->transact(SET_PREVIEW_CALLBACK_TARGET, data, &reply);
114 return reply.readInt32();
115 }
116
117 // start preview mode, must call setPreviewTarget first
startPreview()118 status_t startPreview()
119 {
120 ALOGV("startPreview");
121 Parcel data, reply;
122 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
123 remote()->transact(START_PREVIEW, data, &reply);
124 return reply.readInt32();
125 }
126
127 // start recording mode, must call setPreviewTarget first
startRecording()128 status_t startRecording()
129 {
130 ALOGV("startRecording");
131 Parcel data, reply;
132 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
133 remote()->transact(START_RECORDING, data, &reply);
134 return reply.readInt32();
135 }
136
137 // stop preview mode
stopPreview()138 void stopPreview()
139 {
140 ALOGV("stopPreview");
141 Parcel data, reply;
142 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
143 remote()->transact(STOP_PREVIEW, data, &reply);
144 }
145
146 // stop recording mode
stopRecording()147 void stopRecording()
148 {
149 ALOGV("stopRecording");
150 Parcel data, reply;
151 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
152 remote()->transact(STOP_RECORDING, data, &reply);
153 }
154
releaseRecordingFrame(const sp<IMemory> & mem)155 void releaseRecordingFrame(const sp<IMemory>& mem)
156 {
157 ALOGV("releaseRecordingFrame");
158 Parcel data, reply;
159 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
160 data.writeStrongBinder(IInterface::asBinder(mem));
161
162 remote()->transact(RELEASE_RECORDING_FRAME, data, &reply);
163 }
164
releaseRecordingFrameHandle(native_handle_t * handle)165 void releaseRecordingFrameHandle(native_handle_t *handle) {
166 ALOGV("releaseRecordingFrameHandle");
167 Parcel data, reply;
168 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
169 data.writeNativeHandle(handle);
170
171 remote()->transact(RELEASE_RECORDING_FRAME_HANDLE, data, &reply);
172
173 // Close the native handle because camera received a dup copy.
174 native_handle_close(handle);
175 native_handle_delete(handle);
176 }
177
releaseRecordingFrameHandleBatch(const std::vector<native_handle_t * > & handles)178 void releaseRecordingFrameHandleBatch(const std::vector<native_handle_t*>& handles) {
179 ALOGV("releaseRecordingFrameHandleBatch");
180 Parcel data, reply;
181 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
182 uint32_t n = handles.size();
183 data.writeUint32(n);
184 for (auto& handle : handles) {
185 data.writeNativeHandle(handle);
186 }
187 remote()->transact(RELEASE_RECORDING_FRAME_HANDLE_BATCH, data, &reply);
188
189 // Close the native handle because camera received a dup copy.
190 for (auto& handle : handles) {
191 native_handle_close(handle);
192 native_handle_delete(handle);
193 }
194 }
195
setAudioRestriction(int32_t mode)196 status_t setAudioRestriction(int32_t mode) {
197 Parcel data, reply;
198 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
199 data.writeInt32(mode);
200 remote()->transact(SET_AUDIO_RESTRICTION, data, &reply);
201 return reply.readInt32();
202 }
203
getGlobalAudioRestriction()204 int32_t getGlobalAudioRestriction() {
205 Parcel data, reply;
206 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
207 remote()->transact(GET_GLOBAL_AUDIO_RESTRICTION, data, &reply);
208 return reply.readInt32();
209 }
210
setVideoBufferMode(int32_t videoBufferMode)211 status_t setVideoBufferMode(int32_t videoBufferMode)
212 {
213 ALOGV("setVideoBufferMode: %d", videoBufferMode);
214 Parcel data, reply;
215 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
216 data.writeInt32(videoBufferMode);
217 remote()->transact(SET_VIDEO_BUFFER_MODE, data, &reply);
218 return reply.readInt32();
219 }
220
221 // check preview state
previewEnabled()222 bool previewEnabled()
223 {
224 ALOGV("previewEnabled");
225 Parcel data, reply;
226 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
227 remote()->transact(PREVIEW_ENABLED, data, &reply);
228 return reply.readInt32();
229 }
230
231 // check recording state
recordingEnabled()232 bool recordingEnabled()
233 {
234 ALOGV("recordingEnabled");
235 Parcel data, reply;
236 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
237 remote()->transact(RECORDING_ENABLED, data, &reply);
238 return reply.readInt32();
239 }
240
241 // auto focus
autoFocus()242 status_t autoFocus()
243 {
244 ALOGV("autoFocus");
245 Parcel data, reply;
246 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
247 remote()->transact(AUTO_FOCUS, data, &reply);
248 status_t ret = reply.readInt32();
249 return ret;
250 }
251
252 // cancel focus
cancelAutoFocus()253 status_t cancelAutoFocus()
254 {
255 ALOGV("cancelAutoFocus");
256 Parcel data, reply;
257 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
258 remote()->transact(CANCEL_AUTO_FOCUS, data, &reply);
259 status_t ret = reply.readInt32();
260 return ret;
261 }
262
263 // take a picture - returns an IMemory (ref-counted mmap)
takePicture(int msgType)264 status_t takePicture(int msgType)
265 {
266 ALOGV("takePicture: 0x%x", msgType);
267 Parcel data, reply;
268 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
269 data.writeInt32(msgType);
270 remote()->transact(TAKE_PICTURE, data, &reply);
271 status_t ret = reply.readInt32();
272 return ret;
273 }
274
275 // set preview/capture parameters - key/value pairs
setParameters(const String8 & params)276 status_t setParameters(const String8& params)
277 {
278 ALOGV("setParameters");
279 Parcel data, reply;
280 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
281 data.writeString8(params);
282 remote()->transact(SET_PARAMETERS, data, &reply);
283 return reply.readInt32();
284 }
285
286 // get preview/capture parameters - key/value pairs
getParameters() const287 String8 getParameters() const
288 {
289 ALOGV("getParameters");
290 Parcel data, reply;
291 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
292 remote()->transact(GET_PARAMETERS, data, &reply);
293 return reply.readString8();
294 }
sendCommand(int32_t cmd,int32_t arg1,int32_t arg2)295 virtual status_t sendCommand(int32_t cmd, int32_t arg1, int32_t arg2)
296 {
297 ALOGV("sendCommand");
298 Parcel data, reply;
299 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
300 data.writeInt32(cmd);
301 data.writeInt32(arg1);
302 data.writeInt32(arg2);
303 remote()->transact(SEND_COMMAND, data, &reply);
304 return reply.readInt32();
305 }
connect(const sp<ICameraClient> & cameraClient)306 virtual status_t connect(const sp<ICameraClient>& cameraClient)
307 {
308 Parcel data, reply;
309 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
310 data.writeStrongBinder(IInterface::asBinder(cameraClient));
311 remote()->transact(CONNECT, data, &reply);
312 return reply.readInt32();
313 }
lock()314 virtual status_t lock()
315 {
316 Parcel data, reply;
317 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
318 remote()->transact(LOCK, data, &reply);
319 return reply.readInt32();
320 }
unlock()321 virtual status_t unlock()
322 {
323 Parcel data, reply;
324 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
325 remote()->transact(UNLOCK, data, &reply);
326 return reply.readInt32();
327 }
328
setVideoTarget(const sp<IGraphicBufferProducer> & bufferProducer)329 status_t setVideoTarget(const sp<IGraphicBufferProducer>& bufferProducer)
330 {
331 ALOGV("setVideoTarget");
332 Parcel data, reply;
333 data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
334 sp<IBinder> b(IInterface::asBinder(bufferProducer));
335 data.writeStrongBinder(b);
336 remote()->transact(SET_VIDEO_BUFFER_TARGET, data, &reply);
337 return reply.readInt32();
338 }
339 };
340
341 IMPLEMENT_META_INTERFACE(Camera, "android.hardware.ICamera");
342
343 // ----------------------------------------------------------------------
344
onTransact(uint32_t code,const Parcel & data,Parcel * reply,uint32_t flags)345 status_t BnCamera::onTransact(
346 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
347 {
348 switch(code) {
349 case DISCONNECT: {
350 ALOGV("DISCONNECT");
351 CHECK_INTERFACE(ICamera, data, reply);
352 disconnect();
353 reply->writeNoException();
354 return NO_ERROR;
355 } break;
356 case SET_PREVIEW_TARGET: {
357 ALOGV("SET_PREVIEW_TARGET");
358 CHECK_INTERFACE(ICamera, data, reply);
359 sp<IGraphicBufferProducer> st =
360 interface_cast<IGraphicBufferProducer>(data.readStrongBinder());
361 reply->writeInt32(setPreviewTarget(st));
362 return NO_ERROR;
363 } break;
364 case SET_PREVIEW_CALLBACK_FLAG: {
365 ALOGV("SET_PREVIEW_CALLBACK_TYPE");
366 CHECK_INTERFACE(ICamera, data, reply);
367 int callback_flag = data.readInt32();
368 setPreviewCallbackFlag(callback_flag);
369 return NO_ERROR;
370 } break;
371 case SET_PREVIEW_CALLBACK_TARGET: {
372 ALOGV("SET_PREVIEW_CALLBACK_TARGET");
373 CHECK_INTERFACE(ICamera, data, reply);
374 sp<IGraphicBufferProducer> cp =
375 interface_cast<IGraphicBufferProducer>(data.readStrongBinder());
376 reply->writeInt32(setPreviewCallbackTarget(cp));
377 return NO_ERROR;
378 }
379 case START_PREVIEW: {
380 ALOGV("START_PREVIEW");
381 CHECK_INTERFACE(ICamera, data, reply);
382 reply->writeInt32(startPreview());
383 return NO_ERROR;
384 } break;
385 case START_RECORDING: {
386 ALOGV("START_RECORDING");
387 CHECK_INTERFACE(ICamera, data, reply);
388 reply->writeInt32(startRecording());
389 return NO_ERROR;
390 } break;
391 case STOP_PREVIEW: {
392 ALOGV("STOP_PREVIEW");
393 CHECK_INTERFACE(ICamera, data, reply);
394 stopPreview();
395 return NO_ERROR;
396 } break;
397 case STOP_RECORDING: {
398 ALOGV("STOP_RECORDING");
399 CHECK_INTERFACE(ICamera, data, reply);
400 stopRecording();
401 return NO_ERROR;
402 } break;
403 case RELEASE_RECORDING_FRAME: {
404 ALOGV("RELEASE_RECORDING_FRAME");
405 CHECK_INTERFACE(ICamera, data, reply);
406 sp<IMemory> mem = interface_cast<IMemory>(data.readStrongBinder());
407 releaseRecordingFrame(mem);
408 return NO_ERROR;
409 } break;
410 case RELEASE_RECORDING_FRAME_HANDLE: {
411 ALOGV("RELEASE_RECORDING_FRAME_HANDLE");
412 CHECK_INTERFACE(ICamera, data, reply);
413 // releaseRecordingFrameHandle will be responsble to close the native handle.
414 releaseRecordingFrameHandle(data.readNativeHandle());
415 return NO_ERROR;
416 } break;
417 case RELEASE_RECORDING_FRAME_HANDLE_BATCH: {
418 ALOGV("RELEASE_RECORDING_FRAME_HANDLE_BATCH");
419 CHECK_INTERFACE(ICamera, data, reply);
420 // releaseRecordingFrameHandle will be responsble to close the native handle.
421 uint32_t n = data.readUint32();
422 std::vector<native_handle_t*> handles;
423 handles.reserve(n);
424 for (uint32_t i = 0; i < n; i++) {
425 handles.push_back(data.readNativeHandle());
426 }
427 releaseRecordingFrameHandleBatch(handles);
428 return NO_ERROR;
429 } break;
430 case SET_VIDEO_BUFFER_MODE: {
431 ALOGV("SET_VIDEO_BUFFER_MODE");
432 CHECK_INTERFACE(ICamera, data, reply);
433 int32_t mode = data.readInt32();
434 reply->writeInt32(setVideoBufferMode(mode));
435 return NO_ERROR;
436 } break;
437 case PREVIEW_ENABLED: {
438 ALOGV("PREVIEW_ENABLED");
439 CHECK_INTERFACE(ICamera, data, reply);
440 reply->writeInt32(previewEnabled());
441 return NO_ERROR;
442 } break;
443 case RECORDING_ENABLED: {
444 ALOGV("RECORDING_ENABLED");
445 CHECK_INTERFACE(ICamera, data, reply);
446 reply->writeInt32(recordingEnabled());
447 return NO_ERROR;
448 } break;
449 case AUTO_FOCUS: {
450 ALOGV("AUTO_FOCUS");
451 CHECK_INTERFACE(ICamera, data, reply);
452 reply->writeInt32(autoFocus());
453 return NO_ERROR;
454 } break;
455 case CANCEL_AUTO_FOCUS: {
456 ALOGV("CANCEL_AUTO_FOCUS");
457 CHECK_INTERFACE(ICamera, data, reply);
458 reply->writeInt32(cancelAutoFocus());
459 return NO_ERROR;
460 } break;
461 case TAKE_PICTURE: {
462 ALOGV("TAKE_PICTURE");
463 CHECK_INTERFACE(ICamera, data, reply);
464 int msgType = data.readInt32();
465 reply->writeInt32(takePicture(msgType));
466 return NO_ERROR;
467 } break;
468 case SET_PARAMETERS: {
469 ALOGV("SET_PARAMETERS");
470 CHECK_INTERFACE(ICamera, data, reply);
471 String8 params(data.readString8());
472 reply->writeInt32(setParameters(params));
473 return NO_ERROR;
474 } break;
475 case GET_PARAMETERS: {
476 ALOGV("GET_PARAMETERS");
477 CHECK_INTERFACE(ICamera, data, reply);
478 reply->writeString8(getParameters());
479 return NO_ERROR;
480 } break;
481 case SEND_COMMAND: {
482 ALOGV("SEND_COMMAND");
483 CHECK_INTERFACE(ICamera, data, reply);
484 int command = data.readInt32();
485 int arg1 = data.readInt32();
486 int arg2 = data.readInt32();
487 reply->writeInt32(sendCommand(command, arg1, arg2));
488 return NO_ERROR;
489 } break;
490 case CONNECT: {
491 CHECK_INTERFACE(ICamera, data, reply);
492 sp<ICameraClient> cameraClient = interface_cast<ICameraClient>(data.readStrongBinder());
493 reply->writeInt32(connect(cameraClient));
494 return NO_ERROR;
495 } break;
496 case LOCK: {
497 CHECK_INTERFACE(ICamera, data, reply);
498 reply->writeInt32(lock());
499 return NO_ERROR;
500 } break;
501 case UNLOCK: {
502 CHECK_INTERFACE(ICamera, data, reply);
503 reply->writeInt32(unlock());
504 return NO_ERROR;
505 } break;
506 case SET_VIDEO_BUFFER_TARGET: {
507 ALOGV("SET_VIDEO_BUFFER_TARGET");
508 CHECK_INTERFACE(ICamera, data, reply);
509 sp<IGraphicBufferProducer> st =
510 interface_cast<IGraphicBufferProducer>(data.readStrongBinder());
511 reply->writeInt32(setVideoTarget(st));
512 return NO_ERROR;
513 } break;
514 case SET_AUDIO_RESTRICTION: {
515 CHECK_INTERFACE(ICamera, data, reply);
516 int32_t mode = data.readInt32();
517 reply->writeInt32(setAudioRestriction(mode));
518 return NO_ERROR;
519 } break;
520 case GET_GLOBAL_AUDIO_RESTRICTION: {
521 CHECK_INTERFACE(ICamera, data, reply);
522 reply->writeInt32(getGlobalAudioRestriction());
523 return NO_ERROR;
524 } break;
525 default:
526 return BBinder::onTransact(code, data, reply, flags);
527 }
528 }
529
530 // ----------------------------------------------------------------------------
531
532 } // namespace hardware
533 } // namespace android
534