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 };
60 
61 class BpCamera: public BpInterface<ICamera>
62 {
63 public:
BpCamera(const sp<IBinder> & impl)64     explicit BpCamera(const sp<IBinder>& impl)
65         : BpInterface<ICamera>(impl)
66     {
67     }
68 
69     // disconnect from camera service
disconnect()70     binder::Status disconnect()
71     {
72         ALOGV("disconnect");
73         Parcel data, reply;
74         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
75         remote()->transact(DISCONNECT, data, &reply);
76         reply.readExceptionCode();
77         return binder::Status::ok();
78     }
79 
80     // pass the buffered IGraphicBufferProducer to the camera service
setPreviewTarget(const sp<IGraphicBufferProducer> & bufferProducer)81     status_t setPreviewTarget(const sp<IGraphicBufferProducer>& bufferProducer)
82     {
83         ALOGV("setPreviewTarget");
84         Parcel data, reply;
85         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
86         sp<IBinder> b(IInterface::asBinder(bufferProducer));
87         data.writeStrongBinder(b);
88         remote()->transact(SET_PREVIEW_TARGET, data, &reply);
89         return reply.readInt32();
90     }
91 
92     // set the preview callback flag to affect how the received frames from
93     // preview are handled. See Camera.h for details.
setPreviewCallbackFlag(int flag)94     void setPreviewCallbackFlag(int flag)
95     {
96         ALOGV("setPreviewCallbackFlag(%d)", flag);
97         Parcel data, reply;
98         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
99         data.writeInt32(flag);
100         remote()->transact(SET_PREVIEW_CALLBACK_FLAG, data, &reply);
101     }
102 
setPreviewCallbackTarget(const sp<IGraphicBufferProducer> & callbackProducer)103     status_t setPreviewCallbackTarget(
104             const sp<IGraphicBufferProducer>& callbackProducer)
105     {
106         ALOGV("setPreviewCallbackTarget");
107         Parcel data, reply;
108         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
109         sp<IBinder> b(IInterface::asBinder(callbackProducer));
110         data.writeStrongBinder(b);
111         remote()->transact(SET_PREVIEW_CALLBACK_TARGET, data, &reply);
112         return reply.readInt32();
113     }
114 
115     // start preview mode, must call setPreviewTarget first
startPreview()116     status_t startPreview()
117     {
118         ALOGV("startPreview");
119         Parcel data, reply;
120         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
121         remote()->transact(START_PREVIEW, data, &reply);
122         return reply.readInt32();
123     }
124 
125     // start recording mode, must call setPreviewTarget first
startRecording()126     status_t startRecording()
127     {
128         ALOGV("startRecording");
129         Parcel data, reply;
130         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
131         remote()->transact(START_RECORDING, data, &reply);
132         return reply.readInt32();
133     }
134 
135     // stop preview mode
stopPreview()136     void stopPreview()
137     {
138         ALOGV("stopPreview");
139         Parcel data, reply;
140         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
141         remote()->transact(STOP_PREVIEW, data, &reply);
142     }
143 
144     // stop recording mode
stopRecording()145     void stopRecording()
146     {
147         ALOGV("stopRecording");
148         Parcel data, reply;
149         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
150         remote()->transact(STOP_RECORDING, data, &reply);
151     }
152 
releaseRecordingFrame(const sp<IMemory> & mem)153     void releaseRecordingFrame(const sp<IMemory>& mem)
154     {
155         ALOGV("releaseRecordingFrame");
156         Parcel data, reply;
157         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
158         data.writeStrongBinder(IInterface::asBinder(mem));
159 
160         remote()->transact(RELEASE_RECORDING_FRAME, data, &reply);
161     }
162 
releaseRecordingFrameHandle(native_handle_t * handle)163     void releaseRecordingFrameHandle(native_handle_t *handle) {
164         ALOGV("releaseRecordingFrameHandle");
165         Parcel data, reply;
166         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
167         data.writeNativeHandle(handle);
168 
169         remote()->transact(RELEASE_RECORDING_FRAME_HANDLE, data, &reply);
170 
171         // Close the native handle because camera received a dup copy.
172         native_handle_close(handle);
173         native_handle_delete(handle);
174     }
175 
releaseRecordingFrameHandleBatch(const std::vector<native_handle_t * > & handles)176     void releaseRecordingFrameHandleBatch(const std::vector<native_handle_t*>& handles) {
177         ALOGV("releaseRecordingFrameHandleBatch");
178         Parcel data, reply;
179         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
180         uint32_t n = handles.size();
181         data.writeUint32(n);
182         for (auto& handle : handles) {
183             data.writeNativeHandle(handle);
184         }
185         remote()->transact(RELEASE_RECORDING_FRAME_HANDLE_BATCH, data, &reply);
186 
187         // Close the native handle because camera received a dup copy.
188         for (auto& handle : handles) {
189             native_handle_close(handle);
190             native_handle_delete(handle);
191         }
192     }
193 
setVideoBufferMode(int32_t videoBufferMode)194     status_t setVideoBufferMode(int32_t videoBufferMode)
195     {
196         ALOGV("setVideoBufferMode: %d", videoBufferMode);
197         Parcel data, reply;
198         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
199         data.writeInt32(videoBufferMode);
200         remote()->transact(SET_VIDEO_BUFFER_MODE, data, &reply);
201         return reply.readInt32();
202     }
203 
204     // check preview state
previewEnabled()205     bool previewEnabled()
206     {
207         ALOGV("previewEnabled");
208         Parcel data, reply;
209         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
210         remote()->transact(PREVIEW_ENABLED, data, &reply);
211         return reply.readInt32();
212     }
213 
214     // check recording state
recordingEnabled()215     bool recordingEnabled()
216     {
217         ALOGV("recordingEnabled");
218         Parcel data, reply;
219         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
220         remote()->transact(RECORDING_ENABLED, data, &reply);
221         return reply.readInt32();
222     }
223 
224     // auto focus
autoFocus()225     status_t autoFocus()
226     {
227         ALOGV("autoFocus");
228         Parcel data, reply;
229         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
230         remote()->transact(AUTO_FOCUS, data, &reply);
231         status_t ret = reply.readInt32();
232         return ret;
233     }
234 
235     // cancel focus
cancelAutoFocus()236     status_t cancelAutoFocus()
237     {
238         ALOGV("cancelAutoFocus");
239         Parcel data, reply;
240         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
241         remote()->transact(CANCEL_AUTO_FOCUS, data, &reply);
242         status_t ret = reply.readInt32();
243         return ret;
244     }
245 
246     // take a picture - returns an IMemory (ref-counted mmap)
takePicture(int msgType)247     status_t takePicture(int msgType)
248     {
249         ALOGV("takePicture: 0x%x", msgType);
250         Parcel data, reply;
251         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
252         data.writeInt32(msgType);
253         remote()->transact(TAKE_PICTURE, data, &reply);
254         status_t ret = reply.readInt32();
255         return ret;
256     }
257 
258     // set preview/capture parameters - key/value pairs
setParameters(const String8 & params)259     status_t setParameters(const String8& params)
260     {
261         ALOGV("setParameters");
262         Parcel data, reply;
263         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
264         data.writeString8(params);
265         remote()->transact(SET_PARAMETERS, data, &reply);
266         return reply.readInt32();
267     }
268 
269     // get preview/capture parameters - key/value pairs
getParameters() const270     String8 getParameters() const
271     {
272         ALOGV("getParameters");
273         Parcel data, reply;
274         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
275         remote()->transact(GET_PARAMETERS, data, &reply);
276         return reply.readString8();
277     }
sendCommand(int32_t cmd,int32_t arg1,int32_t arg2)278     virtual status_t sendCommand(int32_t cmd, int32_t arg1, int32_t arg2)
279     {
280         ALOGV("sendCommand");
281         Parcel data, reply;
282         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
283         data.writeInt32(cmd);
284         data.writeInt32(arg1);
285         data.writeInt32(arg2);
286         remote()->transact(SEND_COMMAND, data, &reply);
287         return reply.readInt32();
288     }
connect(const sp<ICameraClient> & cameraClient)289     virtual status_t connect(const sp<ICameraClient>& cameraClient)
290     {
291         Parcel data, reply;
292         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
293         data.writeStrongBinder(IInterface::asBinder(cameraClient));
294         remote()->transact(CONNECT, data, &reply);
295         return reply.readInt32();
296     }
lock()297     virtual status_t lock()
298     {
299         Parcel data, reply;
300         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
301         remote()->transact(LOCK, data, &reply);
302         return reply.readInt32();
303     }
unlock()304     virtual status_t unlock()
305     {
306         Parcel data, reply;
307         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
308         remote()->transact(UNLOCK, data, &reply);
309         return reply.readInt32();
310     }
311 
setVideoTarget(const sp<IGraphicBufferProducer> & bufferProducer)312     status_t setVideoTarget(const sp<IGraphicBufferProducer>& bufferProducer)
313     {
314         ALOGV("setVideoTarget");
315         Parcel data, reply;
316         data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
317         sp<IBinder> b(IInterface::asBinder(bufferProducer));
318         data.writeStrongBinder(b);
319         remote()->transact(SET_VIDEO_BUFFER_TARGET, data, &reply);
320         return reply.readInt32();
321     }
322 };
323 
324 IMPLEMENT_META_INTERFACE(Camera, "android.hardware.ICamera");
325 
326 // ----------------------------------------------------------------------
327 
onTransact(uint32_t code,const Parcel & data,Parcel * reply,uint32_t flags)328 status_t BnCamera::onTransact(
329     uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
330 {
331     switch(code) {
332         case DISCONNECT: {
333             ALOGV("DISCONNECT");
334             CHECK_INTERFACE(ICamera, data, reply);
335             disconnect();
336             reply->writeNoException();
337             return NO_ERROR;
338         } break;
339         case SET_PREVIEW_TARGET: {
340             ALOGV("SET_PREVIEW_TARGET");
341             CHECK_INTERFACE(ICamera, data, reply);
342             sp<IGraphicBufferProducer> st =
343                 interface_cast<IGraphicBufferProducer>(data.readStrongBinder());
344             reply->writeInt32(setPreviewTarget(st));
345             return NO_ERROR;
346         } break;
347         case SET_PREVIEW_CALLBACK_FLAG: {
348             ALOGV("SET_PREVIEW_CALLBACK_TYPE");
349             CHECK_INTERFACE(ICamera, data, reply);
350             int callback_flag = data.readInt32();
351             setPreviewCallbackFlag(callback_flag);
352             return NO_ERROR;
353         } break;
354         case SET_PREVIEW_CALLBACK_TARGET: {
355             ALOGV("SET_PREVIEW_CALLBACK_TARGET");
356             CHECK_INTERFACE(ICamera, data, reply);
357             sp<IGraphicBufferProducer> cp =
358                 interface_cast<IGraphicBufferProducer>(data.readStrongBinder());
359             reply->writeInt32(setPreviewCallbackTarget(cp));
360             return NO_ERROR;
361         }
362         case START_PREVIEW: {
363             ALOGV("START_PREVIEW");
364             CHECK_INTERFACE(ICamera, data, reply);
365             reply->writeInt32(startPreview());
366             return NO_ERROR;
367         } break;
368         case START_RECORDING: {
369             ALOGV("START_RECORDING");
370             CHECK_INTERFACE(ICamera, data, reply);
371             reply->writeInt32(startRecording());
372             return NO_ERROR;
373         } break;
374         case STOP_PREVIEW: {
375             ALOGV("STOP_PREVIEW");
376             CHECK_INTERFACE(ICamera, data, reply);
377             stopPreview();
378             return NO_ERROR;
379         } break;
380         case STOP_RECORDING: {
381             ALOGV("STOP_RECORDING");
382             CHECK_INTERFACE(ICamera, data, reply);
383             stopRecording();
384             return NO_ERROR;
385         } break;
386         case RELEASE_RECORDING_FRAME: {
387             ALOGV("RELEASE_RECORDING_FRAME");
388             CHECK_INTERFACE(ICamera, data, reply);
389             sp<IMemory> mem = interface_cast<IMemory>(data.readStrongBinder());
390             releaseRecordingFrame(mem);
391             return NO_ERROR;
392         } break;
393         case RELEASE_RECORDING_FRAME_HANDLE: {
394             ALOGV("RELEASE_RECORDING_FRAME_HANDLE");
395             CHECK_INTERFACE(ICamera, data, reply);
396             // releaseRecordingFrameHandle will be responsble to close the native handle.
397             releaseRecordingFrameHandle(data.readNativeHandle());
398             return NO_ERROR;
399         } break;
400         case RELEASE_RECORDING_FRAME_HANDLE_BATCH: {
401             ALOGV("RELEASE_RECORDING_FRAME_HANDLE_BATCH");
402             CHECK_INTERFACE(ICamera, data, reply);
403             // releaseRecordingFrameHandle will be responsble to close the native handle.
404             uint32_t n = data.readUint32();
405             std::vector<native_handle_t*> handles;
406             handles.reserve(n);
407             for (uint32_t i = 0; i < n; i++) {
408                 handles.push_back(data.readNativeHandle());
409             }
410             releaseRecordingFrameHandleBatch(handles);
411             return NO_ERROR;
412         } break;
413         case SET_VIDEO_BUFFER_MODE: {
414             ALOGV("SET_VIDEO_BUFFER_MODE");
415             CHECK_INTERFACE(ICamera, data, reply);
416             int32_t mode = data.readInt32();
417             reply->writeInt32(setVideoBufferMode(mode));
418             return NO_ERROR;
419         } break;
420         case PREVIEW_ENABLED: {
421             ALOGV("PREVIEW_ENABLED");
422             CHECK_INTERFACE(ICamera, data, reply);
423             reply->writeInt32(previewEnabled());
424             return NO_ERROR;
425         } break;
426         case RECORDING_ENABLED: {
427             ALOGV("RECORDING_ENABLED");
428             CHECK_INTERFACE(ICamera, data, reply);
429             reply->writeInt32(recordingEnabled());
430             return NO_ERROR;
431         } break;
432         case AUTO_FOCUS: {
433             ALOGV("AUTO_FOCUS");
434             CHECK_INTERFACE(ICamera, data, reply);
435             reply->writeInt32(autoFocus());
436             return NO_ERROR;
437         } break;
438         case CANCEL_AUTO_FOCUS: {
439             ALOGV("CANCEL_AUTO_FOCUS");
440             CHECK_INTERFACE(ICamera, data, reply);
441             reply->writeInt32(cancelAutoFocus());
442             return NO_ERROR;
443         } break;
444         case TAKE_PICTURE: {
445             ALOGV("TAKE_PICTURE");
446             CHECK_INTERFACE(ICamera, data, reply);
447             int msgType = data.readInt32();
448             reply->writeInt32(takePicture(msgType));
449             return NO_ERROR;
450         } break;
451         case SET_PARAMETERS: {
452             ALOGV("SET_PARAMETERS");
453             CHECK_INTERFACE(ICamera, data, reply);
454             String8 params(data.readString8());
455             reply->writeInt32(setParameters(params));
456             return NO_ERROR;
457          } break;
458         case GET_PARAMETERS: {
459             ALOGV("GET_PARAMETERS");
460             CHECK_INTERFACE(ICamera, data, reply);
461              reply->writeString8(getParameters());
462             return NO_ERROR;
463          } break;
464         case SEND_COMMAND: {
465             ALOGV("SEND_COMMAND");
466             CHECK_INTERFACE(ICamera, data, reply);
467             int command = data.readInt32();
468             int arg1 = data.readInt32();
469             int arg2 = data.readInt32();
470             reply->writeInt32(sendCommand(command, arg1, arg2));
471             return NO_ERROR;
472          } break;
473         case CONNECT: {
474             CHECK_INTERFACE(ICamera, data, reply);
475             sp<ICameraClient> cameraClient = interface_cast<ICameraClient>(data.readStrongBinder());
476             reply->writeInt32(connect(cameraClient));
477             return NO_ERROR;
478         } break;
479         case LOCK: {
480             CHECK_INTERFACE(ICamera, data, reply);
481             reply->writeInt32(lock());
482             return NO_ERROR;
483         } break;
484         case UNLOCK: {
485             CHECK_INTERFACE(ICamera, data, reply);
486             reply->writeInt32(unlock());
487             return NO_ERROR;
488         } break;
489         case SET_VIDEO_BUFFER_TARGET: {
490             ALOGV("SET_VIDEO_BUFFER_TARGET");
491             CHECK_INTERFACE(ICamera, data, reply);
492             sp<IGraphicBufferProducer> st =
493                 interface_cast<IGraphicBufferProducer>(data.readStrongBinder());
494             reply->writeInt32(setVideoTarget(st));
495             return NO_ERROR;
496         } break;
497         default:
498             return BBinder::onTransact(code, data, reply, flags);
499     }
500 }
501 
502 // ----------------------------------------------------------------------------
503 
504 } // namespace hardware
505 } // namespace android
506