ICamera.cpp revision df712ea86e6350f7005a02ab0e1c60c28a343ed0 
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/ISurfaceTexture.h>
26#include <gui/Surface.h>
27
28namespace android {
29
30enum {
31    DISCONNECT = IBinder::FIRST_CALL_TRANSACTION,
32    SET_PREVIEW_DISPLAY,
33    SET_PREVIEW_TEXTURE,
34    SET_PREVIEW_CALLBACK_FLAG,
35    START_PREVIEW,
36    STOP_PREVIEW,
37    AUTO_FOCUS,
38    CANCEL_AUTO_FOCUS,
39    TAKE_PICTURE,
40    SET_PARAMETERS,
41    GET_PARAMETERS,
42    SEND_COMMAND,
43    CONNECT,
44    LOCK,
45    UNLOCK,
46    PREVIEW_ENABLED,
47    START_RECORDING,
48    STOP_RECORDING,
49    RECORDING_ENABLED,
50    RELEASE_RECORDING_FRAME,
51    STORE_META_DATA_IN_BUFFERS,
52};
53
54class BpCamera: public BpInterface<ICamera>
55{
56public:
57    BpCamera(const sp<IBinder>& impl)
58        : BpInterface<ICamera>(impl)
59    {
60    }
61
62    // disconnect from camera service
63    void disconnect()
64    {
65        ALOGV("disconnect");
66        Parcel data, reply;
67        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
68        remote()->transact(DISCONNECT, data, &reply);
69    }
70
71    // pass the buffered Surface to the camera service
72    status_t setPreviewDisplay(const sp<Surface>& surface)
73    {
74        ALOGV("setPreviewDisplay");
75        Parcel data, reply;
76        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
77        Surface::writeToParcel(surface, &data);
78        remote()->transact(SET_PREVIEW_DISPLAY, data, &reply);
79        return reply.readInt32();
80    }
81
82    // pass the buffered SurfaceTexture to the camera service
83    status_t setPreviewTexture(const sp<ISurfaceTexture>& surfaceTexture)
84    {
85        ALOGV("setPreviewTexture");
86        Parcel data, reply;
87        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
88        sp<IBinder> b(surfaceTexture->asBinder());
89        data.writeStrongBinder(b);
90        remote()->transact(SET_PREVIEW_TEXTURE, 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.
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
105    // start preview mode, must call setPreviewDisplay first
106    status_t startPreview()
107    {
108        ALOGV("startPreview");
109        Parcel data, reply;
110        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
111        remote()->transact(START_PREVIEW, data, &reply);
112        return reply.readInt32();
113    }
114
115    // start recording mode, must call setPreviewDisplay first
116    status_t startRecording()
117    {
118        ALOGV("startRecording");
119        Parcel data, reply;
120        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
121        remote()->transact(START_RECORDING, data, &reply);
122        return reply.readInt32();
123    }
124
125    // stop preview mode
126    void stopPreview()
127    {
128        ALOGV("stopPreview");
129        Parcel data, reply;
130        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
131        remote()->transact(STOP_PREVIEW, data, &reply);
132    }
133
134    // stop recording mode
135    void stopRecording()
136    {
137        ALOGV("stopRecording");
138        Parcel data, reply;
139        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
140        remote()->transact(STOP_RECORDING, data, &reply);
141    }
142
143    void releaseRecordingFrame(const sp<IMemory>& mem)
144    {
145        ALOGV("releaseRecordingFrame");
146        Parcel data, reply;
147        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
148        data.writeStrongBinder(mem->asBinder());
149        remote()->transact(RELEASE_RECORDING_FRAME, data, &reply);
150    }
151
152    status_t storeMetaDataInBuffers(bool enabled)
153    {
154        ALOGV("storeMetaDataInBuffers: %s", enabled? "true": "false");
155        Parcel data, reply;
156        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
157        data.writeInt32(enabled);
158        remote()->transact(STORE_META_DATA_IN_BUFFERS, data, &reply);
159        return reply.readInt32();
160    }
161
162    // check preview state
163    bool previewEnabled()
164    {
165        ALOGV("previewEnabled");
166        Parcel data, reply;
167        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
168        remote()->transact(PREVIEW_ENABLED, data, &reply);
169        return reply.readInt32();
170    }
171
172    // check recording state
173    bool recordingEnabled()
174    {
175        ALOGV("recordingEnabled");
176        Parcel data, reply;
177        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
178        remote()->transact(RECORDING_ENABLED, data, &reply);
179        return reply.readInt32();
180    }
181
182    // auto focus
183    status_t autoFocus()
184    {
185        ALOGV("autoFocus");
186        Parcel data, reply;
187        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
188        remote()->transact(AUTO_FOCUS, data, &reply);
189        status_t ret = reply.readInt32();
190        return ret;
191    }
192
193    // cancel focus
194    status_t cancelAutoFocus()
195    {
196        ALOGV("cancelAutoFocus");
197        Parcel data, reply;
198        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
199        remote()->transact(CANCEL_AUTO_FOCUS, data, &reply);
200        status_t ret = reply.readInt32();
201        return ret;
202    }
203
204    // take a picture - returns an IMemory (ref-counted mmap)
205    status_t takePicture(int msgType)
206    {
207        ALOGV("takePicture: 0x%x", msgType);
208        Parcel data, reply;
209        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
210        data.writeInt32(msgType);
211        remote()->transact(TAKE_PICTURE, data, &reply);
212        status_t ret = reply.readInt32();
213        return ret;
214    }
215
216    // set preview/capture parameters - key/value pairs
217    status_t setParameters(const String8& params)
218    {
219        ALOGV("setParameters");
220        Parcel data, reply;
221        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
222        data.writeString8(params);
223        remote()->transact(SET_PARAMETERS, data, &reply);
224        return reply.readInt32();
225    }
226
227    // get preview/capture parameters - key/value pairs
228    String8 getParameters() const
229    {
230        ALOGV("getParameters");
231        Parcel data, reply;
232        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
233        remote()->transact(GET_PARAMETERS, data, &reply);
234        return reply.readString8();
235    }
236    virtual status_t sendCommand(int32_t cmd, int32_t arg1, int32_t arg2)
237    {
238        ALOGV("sendCommand");
239        Parcel data, reply;
240        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
241        data.writeInt32(cmd);
242        data.writeInt32(arg1);
243        data.writeInt32(arg2);
244        remote()->transact(SEND_COMMAND, data, &reply);
245        return reply.readInt32();
246    }
247    virtual status_t connect(const sp<ICameraClient>& cameraClient)
248    {
249        Parcel data, reply;
250        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
251        data.writeStrongBinder(cameraClient->asBinder());
252        remote()->transact(CONNECT, data, &reply);
253        return reply.readInt32();
254    }
255    virtual status_t lock()
256    {
257        Parcel data, reply;
258        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
259        remote()->transact(LOCK, data, &reply);
260        return reply.readInt32();
261    }
262    virtual status_t unlock()
263    {
264        Parcel data, reply;
265        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
266        remote()->transact(UNLOCK, data, &reply);
267        return reply.readInt32();
268    }
269};
270
271IMPLEMENT_META_INTERFACE(Camera, "android.hardware.ICamera");
272
273// ----------------------------------------------------------------------
274
275status_t BnCamera::onTransact(
276    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
277{
278    switch(code) {
279        case DISCONNECT: {
280            ALOGV("DISCONNECT");
281            CHECK_INTERFACE(ICamera, data, reply);
282            disconnect();
283            return NO_ERROR;
284        } break;
285        case SET_PREVIEW_DISPLAY: {
286            ALOGV("SET_PREVIEW_DISPLAY");
287            CHECK_INTERFACE(ICamera, data, reply);
288            sp<Surface> surface = Surface::readFromParcel(data);
289            reply->writeInt32(setPreviewDisplay(surface));
290            return NO_ERROR;
291        } break;
292        case SET_PREVIEW_TEXTURE: {
293            ALOGV("SET_PREVIEW_TEXTURE");
294            CHECK_INTERFACE(ICamera, data, reply);
295            sp<ISurfaceTexture> st = interface_cast<ISurfaceTexture>(data.readStrongBinder());
296            reply->writeInt32(setPreviewTexture(st));
297            return NO_ERROR;
298        } break;
299        case SET_PREVIEW_CALLBACK_FLAG: {
300            ALOGV("SET_PREVIEW_CALLBACK_TYPE");
301            CHECK_INTERFACE(ICamera, data, reply);
302            int callback_flag = data.readInt32();
303            setPreviewCallbackFlag(callback_flag);
304            return NO_ERROR;
305        } break;
306        case START_PREVIEW: {
307            ALOGV("START_PREVIEW");
308            CHECK_INTERFACE(ICamera, data, reply);
309            reply->writeInt32(startPreview());
310            return NO_ERROR;
311        } break;
312        case START_RECORDING: {
313            ALOGV("START_RECORDING");
314            CHECK_INTERFACE(ICamera, data, reply);
315            reply->writeInt32(startRecording());
316            return NO_ERROR;
317        } break;
318        case STOP_PREVIEW: {
319            ALOGV("STOP_PREVIEW");
320            CHECK_INTERFACE(ICamera, data, reply);
321            stopPreview();
322            return NO_ERROR;
323        } break;
324        case STOP_RECORDING: {
325            ALOGV("STOP_RECORDING");
326            CHECK_INTERFACE(ICamera, data, reply);
327            stopRecording();
328            return NO_ERROR;
329        } break;
330        case RELEASE_RECORDING_FRAME: {
331            ALOGV("RELEASE_RECORDING_FRAME");
332            CHECK_INTERFACE(ICamera, data, reply);
333            sp<IMemory> mem = interface_cast<IMemory>(data.readStrongBinder());
334            releaseRecordingFrame(mem);
335            return NO_ERROR;
336        } break;
337        case STORE_META_DATA_IN_BUFFERS: {
338            ALOGV("STORE_META_DATA_IN_BUFFERS");
339            CHECK_INTERFACE(ICamera, data, reply);
340            bool enabled = data.readInt32();
341            reply->writeInt32(storeMetaDataInBuffers(enabled));
342            return NO_ERROR;
343        } break;
344        case PREVIEW_ENABLED: {
345            ALOGV("PREVIEW_ENABLED");
346            CHECK_INTERFACE(ICamera, data, reply);
347            reply->writeInt32(previewEnabled());
348            return NO_ERROR;
349        } break;
350        case RECORDING_ENABLED: {
351            ALOGV("RECORDING_ENABLED");
352            CHECK_INTERFACE(ICamera, data, reply);
353            reply->writeInt32(recordingEnabled());
354            return NO_ERROR;
355        } break;
356        case AUTO_FOCUS: {
357            ALOGV("AUTO_FOCUS");
358            CHECK_INTERFACE(ICamera, data, reply);
359            reply->writeInt32(autoFocus());
360            return NO_ERROR;
361        } break;
362        case CANCEL_AUTO_FOCUS: {
363            ALOGV("CANCEL_AUTO_FOCUS");
364            CHECK_INTERFACE(ICamera, data, reply);
365            reply->writeInt32(cancelAutoFocus());
366            return NO_ERROR;
367        } break;
368        case TAKE_PICTURE: {
369            ALOGV("TAKE_PICTURE");
370            CHECK_INTERFACE(ICamera, data, reply);
371            int msgType = data.readInt32();
372            reply->writeInt32(takePicture(msgType));
373            return NO_ERROR;
374        } break;
375        case SET_PARAMETERS: {
376            ALOGV("SET_PARAMETERS");
377            CHECK_INTERFACE(ICamera, data, reply);
378            String8 params(data.readString8());
379            reply->writeInt32(setParameters(params));
380            return NO_ERROR;
381         } break;
382        case GET_PARAMETERS: {
383            ALOGV("GET_PARAMETERS");
384            CHECK_INTERFACE(ICamera, data, reply);
385             reply->writeString8(getParameters());
386            return NO_ERROR;
387         } break;
388        case SEND_COMMAND: {
389            ALOGV("SEND_COMMAND");
390            CHECK_INTERFACE(ICamera, data, reply);
391            int command = data.readInt32();
392            int arg1 = data.readInt32();
393            int arg2 = data.readInt32();
394            reply->writeInt32(sendCommand(command, arg1, arg2));
395            return NO_ERROR;
396         } break;
397        case CONNECT: {
398            CHECK_INTERFACE(ICamera, data, reply);
399            sp<ICameraClient> cameraClient = interface_cast<ICameraClient>(data.readStrongBinder());
400            reply->writeInt32(connect(cameraClient));
401            return NO_ERROR;
402        } break;
403        case LOCK: {
404            CHECK_INTERFACE(ICamera, data, reply);
405            reply->writeInt32(lock());
406            return NO_ERROR;
407        } break;
408        case UNLOCK: {
409            CHECK_INTERFACE(ICamera, data, reply);
410            reply->writeInt32(unlock());
411            return NO_ERROR;
412        } break;
413        default:
414            return BBinder::onTransact(code, data, reply, flags);
415    }
416}
417
418// ----------------------------------------------------------------------------
419
420}; // namespace android
421