ICamera.cpp revision 3cf613507f1e2f7bd932d921a6e222e426fd3be4 
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
26namespace android {
27
28enum {
29    DISCONNECT = IBinder::FIRST_CALL_TRANSACTION,
30    SET_PREVIEW_DISPLAY,
31    SET_PREVIEW_CALLBACK_FLAG,
32    START_PREVIEW,
33    STOP_PREVIEW,
34    AUTO_FOCUS,
35    CANCEL_AUTO_FOCUS,
36    TAKE_PICTURE,
37    SET_PARAMETERS,
38    GET_PARAMETERS,
39    SEND_COMMAND,
40    CONNECT,
41    LOCK,
42    UNLOCK,
43    PREVIEW_ENABLED,
44    START_RECORDING,
45    STOP_RECORDING,
46    RECORDING_ENABLED,
47    RELEASE_RECORDING_FRAME,
48};
49
50class BpCamera: public BpInterface<ICamera>
51{
52public:
53    BpCamera(const sp<IBinder>& impl)
54        : BpInterface<ICamera>(impl)
55    {
56    }
57
58    // disconnect from camera service
59    void disconnect()
60    {
61        LOGV("disconnect");
62        Parcel data, reply;
63        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
64        remote()->transact(DISCONNECT, data, &reply);
65    }
66
67    // pass the buffered ISurface to the camera service
68    status_t setPreviewDisplay(const sp<ISurface>& surface)
69    {
70        LOGV("setPreviewDisplay");
71        Parcel data, reply;
72        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
73        data.writeStrongBinder(surface->asBinder());
74        remote()->transact(SET_PREVIEW_DISPLAY, data, &reply);
75        return reply.readInt32();
76    }
77
78    // set the preview callback flag to affect how the received frames from
79    // preview are handled. See Camera.h for details.
80    void setPreviewCallbackFlag(int flag)
81    {
82        LOGV("setPreviewCallbackFlag(%d)", flag);
83        Parcel data, reply;
84        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
85        data.writeInt32(flag);
86        remote()->transact(SET_PREVIEW_CALLBACK_FLAG, data, &reply);
87    }
88
89    // start preview mode, must call setPreviewDisplay first
90    status_t startPreview()
91    {
92        LOGV("startPreview");
93        Parcel data, reply;
94        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
95        remote()->transact(START_PREVIEW, data, &reply);
96        return reply.readInt32();
97    }
98
99    // start recording mode, must call setPreviewDisplay first
100    status_t startRecording()
101    {
102        LOGV("startRecording");
103        Parcel data, reply;
104        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
105        remote()->transact(START_RECORDING, data, &reply);
106        return reply.readInt32();
107    }
108
109    // stop preview mode
110    void stopPreview()
111    {
112        LOGV("stopPreview");
113        Parcel data, reply;
114        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
115        remote()->transact(STOP_PREVIEW, data, &reply);
116    }
117
118    // stop recording mode
119    void stopRecording()
120    {
121        LOGV("stopRecording");
122        Parcel data, reply;
123        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
124        remote()->transact(STOP_RECORDING, data, &reply);
125    }
126
127    void releaseRecordingFrame(const sp<IMemory>& mem)
128    {
129        LOGV("releaseRecordingFrame");
130        Parcel data, reply;
131        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
132        data.writeStrongBinder(mem->asBinder());
133        remote()->transact(RELEASE_RECORDING_FRAME, data, &reply);
134    }
135
136    // check preview state
137    bool previewEnabled()
138    {
139        LOGV("previewEnabled");
140        Parcel data, reply;
141        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
142        remote()->transact(PREVIEW_ENABLED, data, &reply);
143        return reply.readInt32();
144    }
145
146    // check recording state
147    bool recordingEnabled()
148    {
149        LOGV("recordingEnabled");
150        Parcel data, reply;
151        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
152        remote()->transact(RECORDING_ENABLED, data, &reply);
153        return reply.readInt32();
154    }
155
156    // auto focus
157    status_t autoFocus()
158    {
159        LOGV("autoFocus");
160        Parcel data, reply;
161        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
162        remote()->transact(AUTO_FOCUS, data, &reply);
163        status_t ret = reply.readInt32();
164        return ret;
165    }
166
167    // cancel focus
168    status_t cancelAutoFocus()
169    {
170        LOGV("cancelAutoFocus");
171        Parcel data, reply;
172        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
173        remote()->transact(CANCEL_AUTO_FOCUS, data, &reply);
174        status_t ret = reply.readInt32();
175        return ret;
176    }
177
178    // take a picture - returns an IMemory (ref-counted mmap)
179    status_t takePicture()
180    {
181        LOGV("takePicture");
182        Parcel data, reply;
183        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
184        remote()->transact(TAKE_PICTURE, data, &reply);
185        status_t ret = reply.readInt32();
186        return ret;
187    }
188
189    // set preview/capture parameters - key/value pairs
190    status_t setParameters(const String8& params)
191    {
192        LOGV("setParameters");
193        Parcel data, reply;
194        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
195        data.writeString8(params);
196        remote()->transact(SET_PARAMETERS, data, &reply);
197        return reply.readInt32();
198    }
199
200    // get preview/capture parameters - key/value pairs
201    String8 getParameters() const
202    {
203        LOGV("getParameters");
204        Parcel data, reply;
205        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
206        remote()->transact(GET_PARAMETERS, data, &reply);
207        return reply.readString8();
208    }
209    virtual status_t sendCommand(int32_t cmd, int32_t arg1, int32_t arg2)
210    {
211        LOGD("sendCommand");
212        Parcel data, reply;
213        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
214        data.writeInt32(cmd);
215        data.writeInt32(arg1);
216        data.writeInt32(arg2);
217        remote()->transact(SEND_COMMAND, data, &reply);
218        return reply.readInt32();
219    }
220    virtual status_t connect(const sp<ICameraClient>& cameraClient)
221    {
222        Parcel data, reply;
223        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
224        data.writeStrongBinder(cameraClient->asBinder());
225        remote()->transact(CONNECT, data, &reply);
226        return reply.readInt32();
227    }
228    virtual status_t lock()
229    {
230        Parcel data, reply;
231        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
232        remote()->transact(LOCK, data, &reply);
233        return reply.readInt32();
234    }
235    virtual status_t unlock()
236    {
237        Parcel data, reply;
238        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
239        remote()->transact(UNLOCK, data, &reply);
240        return reply.readInt32();
241    }
242};
243
244IMPLEMENT_META_INTERFACE(Camera, "android.hardware.ICamera");
245
246// ----------------------------------------------------------------------
247
248status_t BnCamera::onTransact(
249    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
250{
251    switch(code) {
252        case DISCONNECT: {
253            LOGV("DISCONNECT");
254            CHECK_INTERFACE(ICamera, data, reply);
255            disconnect();
256            return NO_ERROR;
257        } break;
258        case SET_PREVIEW_DISPLAY: {
259            LOGV("SET_PREVIEW_DISPLAY");
260            CHECK_INTERFACE(ICamera, data, reply);
261            sp<ISurface> surface = interface_cast<ISurface>(data.readStrongBinder());
262            reply->writeInt32(setPreviewDisplay(surface));
263            return NO_ERROR;
264        } break;
265        case SET_PREVIEW_CALLBACK_FLAG: {
266            LOGV("SET_PREVIEW_CALLBACK_TYPE");
267            CHECK_INTERFACE(ICamera, data, reply);
268            int callback_flag = data.readInt32();
269            setPreviewCallbackFlag(callback_flag);
270            return NO_ERROR;
271        } break;
272        case START_PREVIEW: {
273            LOGV("START_PREVIEW");
274            CHECK_INTERFACE(ICamera, data, reply);
275            reply->writeInt32(startPreview());
276            return NO_ERROR;
277        } break;
278        case START_RECORDING: {
279            LOGV("START_RECORDING");
280            CHECK_INTERFACE(ICamera, data, reply);
281            reply->writeInt32(startRecording());
282            return NO_ERROR;
283        } break;
284        case STOP_PREVIEW: {
285            LOGV("STOP_PREVIEW");
286            CHECK_INTERFACE(ICamera, data, reply);
287            stopPreview();
288            return NO_ERROR;
289        } break;
290        case STOP_RECORDING: {
291            LOGV("STOP_RECORDING");
292            CHECK_INTERFACE(ICamera, data, reply);
293            stopRecording();
294            return NO_ERROR;
295        } break;
296        case RELEASE_RECORDING_FRAME: {
297            LOGV("RELEASE_RECORDING_FRAME");
298            CHECK_INTERFACE(ICamera, data, reply);
299            sp<IMemory> mem = interface_cast<IMemory>(data.readStrongBinder());
300            releaseRecordingFrame(mem);
301            return NO_ERROR;
302        } break;
303        case PREVIEW_ENABLED: {
304            LOGV("PREVIEW_ENABLED");
305            CHECK_INTERFACE(ICamera, data, reply);
306            reply->writeInt32(previewEnabled());
307            return NO_ERROR;
308        } break;
309        case RECORDING_ENABLED: {
310            LOGV("RECORDING_ENABLED");
311            CHECK_INTERFACE(ICamera, data, reply);
312            reply->writeInt32(recordingEnabled());
313            return NO_ERROR;
314        } break;
315        case AUTO_FOCUS: {
316            LOGV("AUTO_FOCUS");
317            CHECK_INTERFACE(ICamera, data, reply);
318            reply->writeInt32(autoFocus());
319            return NO_ERROR;
320        } break;
321        case CANCEL_AUTO_FOCUS: {
322            LOGV("CANCEL_AUTO_FOCUS");
323            CHECK_INTERFACE(ICamera, data, reply);
324            reply->writeInt32(cancelAutoFocus());
325            return NO_ERROR;
326        } break;
327        case TAKE_PICTURE: {
328            LOGV("TAKE_PICTURE");
329            CHECK_INTERFACE(ICamera, data, reply);
330            reply->writeInt32(takePicture());
331            return NO_ERROR;
332        } break;
333        case SET_PARAMETERS: {
334            LOGV("SET_PARAMETERS");
335            CHECK_INTERFACE(ICamera, data, reply);
336            String8 params(data.readString8());
337            reply->writeInt32(setParameters(params));
338            return NO_ERROR;
339         } break;
340        case GET_PARAMETERS: {
341            LOGV("GET_PARAMETERS");
342            CHECK_INTERFACE(ICamera, data, reply);
343             reply->writeString8(getParameters());
344            return NO_ERROR;
345         } break;
346        case SEND_COMMAND: {
347            LOGV("SEND_COMMAND");
348            CHECK_INTERFACE(ICamera, data, reply);
349            int command = data.readInt32();
350            int arg1 = data.readInt32();
351            int arg2 = data.readInt32();
352            reply->writeInt32(sendCommand(command, arg1, arg2));
353            return NO_ERROR;
354         } break;
355        case CONNECT: {
356            CHECK_INTERFACE(ICamera, data, reply);
357            sp<ICameraClient> cameraClient = interface_cast<ICameraClient>(data.readStrongBinder());
358            reply->writeInt32(connect(cameraClient));
359            return NO_ERROR;
360        } break;
361        case LOCK: {
362            CHECK_INTERFACE(ICamera, data, reply);
363            reply->writeInt32(lock());
364            return NO_ERROR;
365        } break;
366        case UNLOCK: {
367            CHECK_INTERFACE(ICamera, data, reply);
368            reply->writeInt32(unlock());
369            return NO_ERROR;
370        } break;
371        default:
372            return BBinder::onTransact(code, data, reply, flags);
373    }
374}
375
376// ----------------------------------------------------------------------------
377
378}; // namespace android
379
380