camera/ICamera.cpp

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