android_hardware_Camera.cpp revision 4a05f436989a49e06ec762aac9507ad13fcc5e23
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 "Camera-JNI" 20#include <utils/Log.h> 21 22#include "jni.h" 23#include "JNIHelp.h" 24#include "android_runtime/AndroidRuntime.h" 25#include <android_runtime/android_graphics_SurfaceTexture.h> 26#include <android_runtime/android_view_Surface.h> 27 28#include <cutils/properties.h> 29#include <utils/Vector.h> 30 31#include <gui/GLConsumer.h> 32#include <gui/Surface.h> 33#include <camera/Camera.h> 34#include <binder/IMemory.h> 35 36using namespace android; 37 38struct fields_t { 39 jfieldID context; 40 jfieldID facing; 41 jfieldID orientation; 42 jfieldID canDisableShutterSound; 43 jfieldID face_rect; 44 jfieldID face_score; 45 jfieldID rect_left; 46 jfieldID rect_top; 47 jfieldID rect_right; 48 jfieldID rect_bottom; 49 jmethodID post_event; 50 jmethodID rect_constructor; 51 jmethodID face_constructor; 52}; 53 54static fields_t fields; 55static Mutex sLock; 56 57// provides persistent context for calls from native code to Java 58class JNICameraContext: public CameraListener 59{ 60public: 61 JNICameraContext(JNIEnv* env, jobject weak_this, jclass clazz, const sp<Camera>& camera); 62 ~JNICameraContext() { release(); } 63 virtual void notify(int32_t msgType, int32_t ext1, int32_t ext2); 64 virtual void postData(int32_t msgType, const sp<IMemory>& dataPtr, 65 camera_frame_metadata_t *metadata); 66 virtual void postDataTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr); 67 void postMetadata(JNIEnv *env, int32_t msgType, camera_frame_metadata_t *metadata); 68 void addCallbackBuffer(JNIEnv *env, jbyteArray cbb, int msgType); 69 void setCallbackMode(JNIEnv *env, bool installed, bool manualMode); 70 sp<Camera> getCamera() { Mutex::Autolock _l(mLock); return mCamera; } 71 bool isRawImageCallbackBufferAvailable() const; 72 void release(); 73 74private: 75 void copyAndPost(JNIEnv* env, const sp<IMemory>& dataPtr, int msgType); 76 void clearCallbackBuffers_l(JNIEnv *env, Vector<jbyteArray> *buffers); 77 void clearCallbackBuffers_l(JNIEnv *env); 78 jbyteArray getCallbackBuffer(JNIEnv *env, Vector<jbyteArray> *buffers, size_t bufferSize); 79 80 jobject mCameraJObjectWeak; // weak reference to java object 81 jclass mCameraJClass; // strong reference to java class 82 sp<Camera> mCamera; // strong reference to native object 83 jclass mFaceClass; // strong reference to Face class 84 jclass mRectClass; // strong reference to Rect class 85 Mutex mLock; 86 87 /* 88 * Global reference application-managed raw image buffer queue. 89 * 90 * Manual-only mode is supported for raw image callbacks, which is 91 * set whenever method addCallbackBuffer() with msgType = 92 * CAMERA_MSG_RAW_IMAGE is called; otherwise, null is returned 93 * with raw image callbacks. 94 */ 95 Vector<jbyteArray> mRawImageCallbackBuffers; 96 97 /* 98 * Application-managed preview buffer queue and the flags 99 * associated with the usage of the preview buffer callback. 100 */ 101 Vector<jbyteArray> mCallbackBuffers; // Global reference application managed byte[] 102 bool mManualBufferMode; // Whether to use application managed buffers. 103 bool mManualCameraCallbackSet; // Whether the callback has been set, used to 104 // reduce unnecessary calls to set the callback. 105}; 106 107bool JNICameraContext::isRawImageCallbackBufferAvailable() const 108{ 109 return !mRawImageCallbackBuffers.isEmpty(); 110} 111 112sp<Camera> get_native_camera(JNIEnv *env, jobject thiz, JNICameraContext** pContext) 113{ 114 sp<Camera> camera; 115 Mutex::Autolock _l(sLock); 116 JNICameraContext* context = reinterpret_cast<JNICameraContext*>(env->GetIntField(thiz, fields.context)); 117 if (context != NULL) { 118 camera = context->getCamera(); 119 } 120 ALOGV("get_native_camera: context=%p, camera=%p", context, camera.get()); 121 if (camera == 0) { 122 jniThrowRuntimeException(env, "Method called after release()"); 123 } 124 125 if (pContext != NULL) *pContext = context; 126 return camera; 127} 128 129JNICameraContext::JNICameraContext(JNIEnv* env, jobject weak_this, jclass clazz, const sp<Camera>& camera) 130{ 131 mCameraJObjectWeak = env->NewGlobalRef(weak_this); 132 mCameraJClass = (jclass)env->NewGlobalRef(clazz); 133 mCamera = camera; 134 135 jclass faceClazz = env->FindClass("android/hardware/Camera$Face"); 136 mFaceClass = (jclass) env->NewGlobalRef(faceClazz); 137 138 jclass rectClazz = env->FindClass("android/graphics/Rect"); 139 mRectClass = (jclass) env->NewGlobalRef(rectClazz); 140 141 mManualBufferMode = false; 142 mManualCameraCallbackSet = false; 143} 144 145void JNICameraContext::release() 146{ 147 ALOGV("release"); 148 Mutex::Autolock _l(mLock); 149 JNIEnv *env = AndroidRuntime::getJNIEnv(); 150 151 if (mCameraJObjectWeak != NULL) { 152 env->DeleteGlobalRef(mCameraJObjectWeak); 153 mCameraJObjectWeak = NULL; 154 } 155 if (mCameraJClass != NULL) { 156 env->DeleteGlobalRef(mCameraJClass); 157 mCameraJClass = NULL; 158 } 159 if (mFaceClass != NULL) { 160 env->DeleteGlobalRef(mFaceClass); 161 mFaceClass = NULL; 162 } 163 if (mRectClass != NULL) { 164 env->DeleteGlobalRef(mRectClass); 165 mRectClass = NULL; 166 } 167 clearCallbackBuffers_l(env); 168 mCamera.clear(); 169} 170 171void JNICameraContext::notify(int32_t msgType, int32_t ext1, int32_t ext2) 172{ 173 ALOGV("notify"); 174 175 // VM pointer will be NULL if object is released 176 Mutex::Autolock _l(mLock); 177 if (mCameraJObjectWeak == NULL) { 178 ALOGW("callback on dead camera object"); 179 return; 180 } 181 JNIEnv *env = AndroidRuntime::getJNIEnv(); 182 183 /* 184 * If the notification or msgType is CAMERA_MSG_RAW_IMAGE_NOTIFY, change it 185 * to CAMERA_MSG_RAW_IMAGE since CAMERA_MSG_RAW_IMAGE_NOTIFY is not exposed 186 * to the Java app. 187 */ 188 if (msgType == CAMERA_MSG_RAW_IMAGE_NOTIFY) { 189 msgType = CAMERA_MSG_RAW_IMAGE; 190 } 191 192 env->CallStaticVoidMethod(mCameraJClass, fields.post_event, 193 mCameraJObjectWeak, msgType, ext1, ext2, NULL); 194} 195 196jbyteArray JNICameraContext::getCallbackBuffer( 197 JNIEnv* env, Vector<jbyteArray>* buffers, size_t bufferSize) 198{ 199 jbyteArray obj = NULL; 200 201 // Vector access should be protected by lock in postData() 202 if (!buffers->isEmpty()) { 203 ALOGV("Using callback buffer from queue of length %d", buffers->size()); 204 jbyteArray globalBuffer = buffers->itemAt(0); 205 buffers->removeAt(0); 206 207 obj = (jbyteArray)env->NewLocalRef(globalBuffer); 208 env->DeleteGlobalRef(globalBuffer); 209 210 if (obj != NULL) { 211 jsize bufferLength = env->GetArrayLength(obj); 212 if ((int)bufferLength < (int)bufferSize) { 213 ALOGE("Callback buffer was too small! Expected %d bytes, but got %d bytes!", 214 bufferSize, bufferLength); 215 env->DeleteLocalRef(obj); 216 return NULL; 217 } 218 } 219 } 220 221 return obj; 222} 223 224void JNICameraContext::copyAndPost(JNIEnv* env, const sp<IMemory>& dataPtr, int msgType) 225{ 226 jbyteArray obj = NULL; 227 228 // allocate Java byte array and copy data 229 if (dataPtr != NULL) { 230 ssize_t offset; 231 size_t size; 232 sp<IMemoryHeap> heap = dataPtr->getMemory(&offset, &size); 233 ALOGV("copyAndPost: off=%ld, size=%d", offset, size); 234 uint8_t *heapBase = (uint8_t*)heap->base(); 235 236 if (heapBase != NULL) { 237 const jbyte* data = reinterpret_cast<const jbyte*>(heapBase + offset); 238 239 if (msgType == CAMERA_MSG_RAW_IMAGE) { 240 obj = getCallbackBuffer(env, &mRawImageCallbackBuffers, size); 241 } else if (msgType == CAMERA_MSG_PREVIEW_FRAME && mManualBufferMode) { 242 obj = getCallbackBuffer(env, &mCallbackBuffers, size); 243 244 if (mCallbackBuffers.isEmpty()) { 245 ALOGV("Out of buffers, clearing callback!"); 246 mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_NOOP); 247 mManualCameraCallbackSet = false; 248 249 if (obj == NULL) { 250 return; 251 } 252 } 253 } else { 254 ALOGV("Allocating callback buffer"); 255 obj = env->NewByteArray(size); 256 } 257 258 if (obj == NULL) { 259 ALOGE("Couldn't allocate byte array for JPEG data"); 260 env->ExceptionClear(); 261 } else { 262 env->SetByteArrayRegion(obj, 0, size, data); 263 } 264 } else { 265 ALOGE("image heap is NULL"); 266 } 267 } 268 269 // post image data to Java 270 env->CallStaticVoidMethod(mCameraJClass, fields.post_event, 271 mCameraJObjectWeak, msgType, 0, 0, obj); 272 if (obj) { 273 env->DeleteLocalRef(obj); 274 } 275} 276 277void JNICameraContext::postData(int32_t msgType, const sp<IMemory>& dataPtr, 278 camera_frame_metadata_t *metadata) 279{ 280 // VM pointer will be NULL if object is released 281 Mutex::Autolock _l(mLock); 282 JNIEnv *env = AndroidRuntime::getJNIEnv(); 283 if (mCameraJObjectWeak == NULL) { 284 ALOGW("callback on dead camera object"); 285 return; 286 } 287 288 int32_t dataMsgType = msgType & ~CAMERA_MSG_PREVIEW_METADATA; 289 290 // return data based on callback type 291 switch (dataMsgType) { 292 case CAMERA_MSG_VIDEO_FRAME: 293 // should never happen 294 break; 295 296 // For backward-compatibility purpose, if there is no callback 297 // buffer for raw image, the callback returns null. 298 case CAMERA_MSG_RAW_IMAGE: 299 ALOGV("rawCallback"); 300 if (mRawImageCallbackBuffers.isEmpty()) { 301 env->CallStaticVoidMethod(mCameraJClass, fields.post_event, 302 mCameraJObjectWeak, dataMsgType, 0, 0, NULL); 303 } else { 304 copyAndPost(env, dataPtr, dataMsgType); 305 } 306 break; 307 308 // There is no data. 309 case 0: 310 break; 311 312 default: 313 ALOGV("dataCallback(%d, %p)", dataMsgType, dataPtr.get()); 314 copyAndPost(env, dataPtr, dataMsgType); 315 break; 316 } 317 318 // post frame metadata to Java 319 if (metadata && (msgType & CAMERA_MSG_PREVIEW_METADATA)) { 320 postMetadata(env, CAMERA_MSG_PREVIEW_METADATA, metadata); 321 } 322} 323 324void JNICameraContext::postDataTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr) 325{ 326 // TODO: plumb up to Java. For now, just drop the timestamp 327 postData(msgType, dataPtr, NULL); 328} 329 330void JNICameraContext::postMetadata(JNIEnv *env, int32_t msgType, camera_frame_metadata_t *metadata) 331{ 332 jobjectArray obj = NULL; 333 obj = (jobjectArray) env->NewObjectArray(metadata->number_of_faces, 334 mFaceClass, NULL); 335 if (obj == NULL) { 336 ALOGE("Couldn't allocate face metadata array"); 337 return; 338 } 339 340 for (int i = 0; i < metadata->number_of_faces; i++) { 341 jobject face = env->NewObject(mFaceClass, fields.face_constructor); 342 env->SetObjectArrayElement(obj, i, face); 343 344 jobject rect = env->NewObject(mRectClass, fields.rect_constructor); 345 env->SetIntField(rect, fields.rect_left, metadata->faces[i].rect[0]); 346 env->SetIntField(rect, fields.rect_top, metadata->faces[i].rect[1]); 347 env->SetIntField(rect, fields.rect_right, metadata->faces[i].rect[2]); 348 env->SetIntField(rect, fields.rect_bottom, metadata->faces[i].rect[3]); 349 350 env->SetObjectField(face, fields.face_rect, rect); 351 env->SetIntField(face, fields.face_score, metadata->faces[i].score); 352 353 env->DeleteLocalRef(face); 354 env->DeleteLocalRef(rect); 355 } 356 env->CallStaticVoidMethod(mCameraJClass, fields.post_event, 357 mCameraJObjectWeak, msgType, 0, 0, obj); 358 env->DeleteLocalRef(obj); 359} 360 361void JNICameraContext::setCallbackMode(JNIEnv *env, bool installed, bool manualMode) 362{ 363 Mutex::Autolock _l(mLock); 364 mManualBufferMode = manualMode; 365 mManualCameraCallbackSet = false; 366 367 // In order to limit the over usage of binder threads, all non-manual buffer 368 // callbacks use CAMERA_FRAME_CALLBACK_FLAG_BARCODE_SCANNER mode now. 369 // 370 // Continuous callbacks will have the callback re-registered from handleMessage. 371 // Manual buffer mode will operate as fast as possible, relying on the finite supply 372 // of buffers for throttling. 373 374 if (!installed) { 375 mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_NOOP); 376 clearCallbackBuffers_l(env, &mCallbackBuffers); 377 } else if (mManualBufferMode) { 378 if (!mCallbackBuffers.isEmpty()) { 379 mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_CAMERA); 380 mManualCameraCallbackSet = true; 381 } 382 } else { 383 mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_BARCODE_SCANNER); 384 clearCallbackBuffers_l(env, &mCallbackBuffers); 385 } 386} 387 388void JNICameraContext::addCallbackBuffer( 389 JNIEnv *env, jbyteArray cbb, int msgType) 390{ 391 ALOGV("addCallbackBuffer: 0x%x", msgType); 392 if (cbb != NULL) { 393 Mutex::Autolock _l(mLock); 394 switch (msgType) { 395 case CAMERA_MSG_PREVIEW_FRAME: { 396 jbyteArray callbackBuffer = (jbyteArray)env->NewGlobalRef(cbb); 397 mCallbackBuffers.push(callbackBuffer); 398 399 ALOGV("Adding callback buffer to queue, %d total", 400 mCallbackBuffers.size()); 401 402 // We want to make sure the camera knows we're ready for the 403 // next frame. This may have come unset had we not had a 404 // callbackbuffer ready for it last time. 405 if (mManualBufferMode && !mManualCameraCallbackSet) { 406 mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_CAMERA); 407 mManualCameraCallbackSet = true; 408 } 409 break; 410 } 411 case CAMERA_MSG_RAW_IMAGE: { 412 jbyteArray callbackBuffer = (jbyteArray)env->NewGlobalRef(cbb); 413 mRawImageCallbackBuffers.push(callbackBuffer); 414 break; 415 } 416 default: { 417 jniThrowException(env, 418 "java/lang/IllegalArgumentException", 419 "Unsupported message type"); 420 return; 421 } 422 } 423 } else { 424 ALOGE("Null byte array!"); 425 } 426} 427 428void JNICameraContext::clearCallbackBuffers_l(JNIEnv *env) 429{ 430 clearCallbackBuffers_l(env, &mCallbackBuffers); 431 clearCallbackBuffers_l(env, &mRawImageCallbackBuffers); 432} 433 434void JNICameraContext::clearCallbackBuffers_l(JNIEnv *env, Vector<jbyteArray> *buffers) { 435 ALOGV("Clearing callback buffers, %d remained", buffers->size()); 436 while (!buffers->isEmpty()) { 437 env->DeleteGlobalRef(buffers->top()); 438 buffers->pop(); 439 } 440} 441 442static jint android_hardware_Camera_getNumberOfCameras(JNIEnv *env, jobject thiz) 443{ 444 return Camera::getNumberOfCameras(); 445} 446 447static void android_hardware_Camera_getCameraInfo(JNIEnv *env, jobject thiz, 448 jint cameraId, jobject info_obj) 449{ 450 CameraInfo cameraInfo; 451 status_t rc = Camera::getCameraInfo(cameraId, &cameraInfo); 452 if (rc != NO_ERROR) { 453 jniThrowRuntimeException(env, "Fail to get camera info"); 454 return; 455 } 456 env->SetIntField(info_obj, fields.facing, cameraInfo.facing); 457 env->SetIntField(info_obj, fields.orientation, cameraInfo.orientation); 458 459 char value[PROPERTY_VALUE_MAX]; 460 property_get("ro.camera.sound.forced", value, "0"); 461 jboolean canDisableShutterSound = (strncmp(value, "0", 2) == 0); 462 env->SetBooleanField(info_obj, fields.canDisableShutterSound, 463 canDisableShutterSound); 464} 465 466// connect to camera service 467static void android_hardware_Camera_native_setup(JNIEnv *env, jobject thiz, 468 jobject weak_this, jint cameraId, jstring clientPackageName) 469{ 470 // Convert jstring to String16 471 const char16_t *rawClientName = env->GetStringChars(clientPackageName, NULL); 472 jsize rawClientNameLen = env->GetStringLength(clientPackageName); 473 String16 clientName(rawClientName, rawClientNameLen); 474 env->ReleaseStringChars(clientPackageName, rawClientName); 475 476 sp<Camera> camera = Camera::connect(cameraId, clientName, 477 Camera::USE_CALLING_UID); 478 479 if (camera == NULL) { 480 jniThrowRuntimeException(env, "Fail to connect to camera service"); 481 return; 482 } 483 484 // make sure camera hardware is alive 485 if (camera->getStatus() != NO_ERROR) { 486 jniThrowRuntimeException(env, "Camera initialization failed"); 487 return; 488 } 489 490 jclass clazz = env->GetObjectClass(thiz); 491 if (clazz == NULL) { 492 jniThrowRuntimeException(env, "Can't find android/hardware/Camera"); 493 return; 494 } 495 496 // We use a weak reference so the Camera object can be garbage collected. 497 // The reference is only used as a proxy for callbacks. 498 sp<JNICameraContext> context = new JNICameraContext(env, weak_this, clazz, camera); 499 context->incStrong((void*)android_hardware_Camera_native_setup); 500 camera->setListener(context); 501 502 // save context in opaque field 503 env->SetIntField(thiz, fields.context, (int)context.get()); 504} 505 506// disconnect from camera service 507// It's okay to call this when the native camera context is already null. 508// This handles the case where the user has called release() and the 509// finalizer is invoked later. 510static void android_hardware_Camera_release(JNIEnv *env, jobject thiz) 511{ 512 // TODO: Change to ALOGV 513 ALOGV("release camera"); 514 JNICameraContext* context = NULL; 515 sp<Camera> camera; 516 { 517 Mutex::Autolock _l(sLock); 518 context = reinterpret_cast<JNICameraContext*>(env->GetIntField(thiz, fields.context)); 519 520 // Make sure we do not attempt to callback on a deleted Java object. 521 env->SetIntField(thiz, fields.context, 0); 522 } 523 524 // clean up if release has not been called before 525 if (context != NULL) { 526 camera = context->getCamera(); 527 context->release(); 528 ALOGV("native_release: context=%p camera=%p", context, camera.get()); 529 530 // clear callbacks 531 if (camera != NULL) { 532 camera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_NOOP); 533 camera->disconnect(); 534 } 535 536 // remove context to prevent further Java access 537 context->decStrong((void*)android_hardware_Camera_native_setup); 538 } 539} 540 541static void android_hardware_Camera_setPreviewDisplay(JNIEnv *env, jobject thiz, jobject jSurface) 542{ 543 ALOGV("setPreviewDisplay"); 544 sp<Camera> camera = get_native_camera(env, thiz, NULL); 545 if (camera == 0) return; 546 547 sp<IGraphicBufferProducer> gbp; 548 sp<Surface> surface; 549 if (jSurface) { 550 surface = android_view_Surface_getSurface(env, jSurface); 551 if (surface != NULL) { 552 gbp = surface->getIGraphicBufferProducer(); 553 } 554 } 555 556 if (camera->setPreviewTexture(gbp) != NO_ERROR) { 557 jniThrowException(env, "java/io/IOException", "setPreviewTexture failed"); 558 } 559} 560 561static void android_hardware_Camera_setPreviewTexture(JNIEnv *env, 562 jobject thiz, jobject jSurfaceTexture) 563{ 564 ALOGV("setPreviewTexture"); 565 sp<Camera> camera = get_native_camera(env, thiz, NULL); 566 if (camera == 0) return; 567 568 sp<BufferQueue> bufferQueue = NULL; 569 if (jSurfaceTexture != NULL) { 570 sp<GLConsumer> surfaceTexture = 571 SurfaceTexture_getSurfaceTexture(env, jSurfaceTexture); 572 if (surfaceTexture != NULL) { 573 bufferQueue = surfaceTexture->getBufferQueue(); 574 } 575 else { 576 jniThrowException(env, "java/lang/IllegalArgumentException", 577 "SurfaceTexture already released in setPreviewTexture"); 578 return; 579 } 580 581 } 582 583 if (camera->setPreviewTexture(bufferQueue) != NO_ERROR) { 584 jniThrowException(env, "java/io/IOException", 585 "setPreviewTexture failed"); 586 } 587} 588 589static void android_hardware_Camera_startPreview(JNIEnv *env, jobject thiz) 590{ 591 ALOGV("startPreview"); 592 sp<Camera> camera = get_native_camera(env, thiz, NULL); 593 if (camera == 0) return; 594 595 if (camera->startPreview() != NO_ERROR) { 596 jniThrowRuntimeException(env, "startPreview failed"); 597 return; 598 } 599} 600 601static void android_hardware_Camera_stopPreview(JNIEnv *env, jobject thiz) 602{ 603 ALOGV("stopPreview"); 604 sp<Camera> c = get_native_camera(env, thiz, NULL); 605 if (c == 0) return; 606 607 c->stopPreview(); 608} 609 610static bool android_hardware_Camera_previewEnabled(JNIEnv *env, jobject thiz) 611{ 612 ALOGV("previewEnabled"); 613 sp<Camera> c = get_native_camera(env, thiz, NULL); 614 if (c == 0) return false; 615 616 return c->previewEnabled(); 617} 618 619static void android_hardware_Camera_setHasPreviewCallback(JNIEnv *env, jobject thiz, jboolean installed, jboolean manualBuffer) 620{ 621 ALOGV("setHasPreviewCallback: installed:%d, manualBuffer:%d", (int)installed, (int)manualBuffer); 622 // Important: Only install preview_callback if the Java code has called 623 // setPreviewCallback() with a non-null value, otherwise we'd pay to memcpy 624 // each preview frame for nothing. 625 JNICameraContext* context; 626 sp<Camera> camera = get_native_camera(env, thiz, &context); 627 if (camera == 0) return; 628 629 // setCallbackMode will take care of setting the context flags and calling 630 // camera->setPreviewCallbackFlags within a mutex for us. 631 context->setCallbackMode(env, installed, manualBuffer); 632} 633 634static void android_hardware_Camera_addCallbackBuffer(JNIEnv *env, jobject thiz, jbyteArray bytes, int msgType) { 635 ALOGV("addCallbackBuffer: 0x%x", msgType); 636 637 JNICameraContext* context = reinterpret_cast<JNICameraContext*>(env->GetIntField(thiz, fields.context)); 638 639 if (context != NULL) { 640 context->addCallbackBuffer(env, bytes, msgType); 641 } 642} 643 644static void android_hardware_Camera_autoFocus(JNIEnv *env, jobject thiz) 645{ 646 ALOGV("autoFocus"); 647 JNICameraContext* context; 648 sp<Camera> c = get_native_camera(env, thiz, &context); 649 if (c == 0) return; 650 651 if (c->autoFocus() != NO_ERROR) { 652 jniThrowRuntimeException(env, "autoFocus failed"); 653 } 654} 655 656static void android_hardware_Camera_cancelAutoFocus(JNIEnv *env, jobject thiz) 657{ 658 ALOGV("cancelAutoFocus"); 659 JNICameraContext* context; 660 sp<Camera> c = get_native_camera(env, thiz, &context); 661 if (c == 0) return; 662 663 if (c->cancelAutoFocus() != NO_ERROR) { 664 jniThrowRuntimeException(env, "cancelAutoFocus failed"); 665 } 666} 667 668static void android_hardware_Camera_takePicture(JNIEnv *env, jobject thiz, int msgType) 669{ 670 ALOGV("takePicture"); 671 JNICameraContext* context; 672 sp<Camera> camera = get_native_camera(env, thiz, &context); 673 if (camera == 0) return; 674 675 /* 676 * When CAMERA_MSG_RAW_IMAGE is requested, if the raw image callback 677 * buffer is available, CAMERA_MSG_RAW_IMAGE is enabled to get the 678 * notification _and_ the data; otherwise, CAMERA_MSG_RAW_IMAGE_NOTIFY 679 * is enabled to receive the callback notification but no data. 680 * 681 * Note that CAMERA_MSG_RAW_IMAGE_NOTIFY is not exposed to the 682 * Java application. 683 */ 684 if (msgType & CAMERA_MSG_RAW_IMAGE) { 685 ALOGV("Enable raw image callback buffer"); 686 if (!context->isRawImageCallbackBufferAvailable()) { 687 ALOGV("Enable raw image notification, since no callback buffer exists"); 688 msgType &= ~CAMERA_MSG_RAW_IMAGE; 689 msgType |= CAMERA_MSG_RAW_IMAGE_NOTIFY; 690 } 691 } 692 693 if (camera->takePicture(msgType) != NO_ERROR) { 694 jniThrowRuntimeException(env, "takePicture failed"); 695 return; 696 } 697} 698 699static void android_hardware_Camera_setParameters(JNIEnv *env, jobject thiz, jstring params) 700{ 701 ALOGV("setParameters"); 702 sp<Camera> camera = get_native_camera(env, thiz, NULL); 703 if (camera == 0) return; 704 705 const jchar* str = env->GetStringCritical(params, 0); 706 String8 params8; 707 if (params) { 708 params8 = String8(str, env->GetStringLength(params)); 709 env->ReleaseStringCritical(params, str); 710 } 711 if (camera->setParameters(params8) != NO_ERROR) { 712 jniThrowRuntimeException(env, "setParameters failed"); 713 return; 714 } 715} 716 717static jstring android_hardware_Camera_getParameters(JNIEnv *env, jobject thiz) 718{ 719 ALOGV("getParameters"); 720 sp<Camera> camera = get_native_camera(env, thiz, NULL); 721 if (camera == 0) return 0; 722 723 String8 params8 = camera->getParameters(); 724 if (params8.isEmpty()) { 725 jniThrowRuntimeException(env, "getParameters failed (empty parameters)"); 726 return 0; 727 } 728 return env->NewStringUTF(params8.string()); 729} 730 731static void android_hardware_Camera_reconnect(JNIEnv *env, jobject thiz) 732{ 733 ALOGV("reconnect"); 734 sp<Camera> camera = get_native_camera(env, thiz, NULL); 735 if (camera == 0) return; 736 737 if (camera->reconnect() != NO_ERROR) { 738 jniThrowException(env, "java/io/IOException", "reconnect failed"); 739 return; 740 } 741} 742 743static void android_hardware_Camera_lock(JNIEnv *env, jobject thiz) 744{ 745 ALOGV("lock"); 746 sp<Camera> camera = get_native_camera(env, thiz, NULL); 747 if (camera == 0) return; 748 749 if (camera->lock() != NO_ERROR) { 750 jniThrowRuntimeException(env, "lock failed"); 751 } 752} 753 754static void android_hardware_Camera_unlock(JNIEnv *env, jobject thiz) 755{ 756 ALOGV("unlock"); 757 sp<Camera> camera = get_native_camera(env, thiz, NULL); 758 if (camera == 0) return; 759 760 if (camera->unlock() != NO_ERROR) { 761 jniThrowRuntimeException(env, "unlock failed"); 762 } 763} 764 765static void android_hardware_Camera_startSmoothZoom(JNIEnv *env, jobject thiz, jint value) 766{ 767 ALOGV("startSmoothZoom"); 768 sp<Camera> camera = get_native_camera(env, thiz, NULL); 769 if (camera == 0) return; 770 771 status_t rc = camera->sendCommand(CAMERA_CMD_START_SMOOTH_ZOOM, value, 0); 772 if (rc == BAD_VALUE) { 773 char msg[64]; 774 sprintf(msg, "invalid zoom value=%d", value); 775 jniThrowException(env, "java/lang/IllegalArgumentException", msg); 776 } else if (rc != NO_ERROR) { 777 jniThrowRuntimeException(env, "start smooth zoom failed"); 778 } 779} 780 781static void android_hardware_Camera_stopSmoothZoom(JNIEnv *env, jobject thiz) 782{ 783 ALOGV("stopSmoothZoom"); 784 sp<Camera> camera = get_native_camera(env, thiz, NULL); 785 if (camera == 0) return; 786 787 if (camera->sendCommand(CAMERA_CMD_STOP_SMOOTH_ZOOM, 0, 0) != NO_ERROR) { 788 jniThrowRuntimeException(env, "stop smooth zoom failed"); 789 } 790} 791 792static void android_hardware_Camera_setDisplayOrientation(JNIEnv *env, jobject thiz, 793 jint value) 794{ 795 ALOGV("setDisplayOrientation"); 796 sp<Camera> camera = get_native_camera(env, thiz, NULL); 797 if (camera == 0) return; 798 799 if (camera->sendCommand(CAMERA_CMD_SET_DISPLAY_ORIENTATION, value, 0) != NO_ERROR) { 800 jniThrowRuntimeException(env, "set display orientation failed"); 801 } 802} 803 804static jboolean android_hardware_Camera_enableShutterSound(JNIEnv *env, jobject thiz, 805 jboolean enabled) 806{ 807 ALOGV("enableShutterSound"); 808 sp<Camera> camera = get_native_camera(env, thiz, NULL); 809 if (camera == 0) return JNI_FALSE; 810 811 int32_t value = (enabled == JNI_TRUE) ? 1 : 0; 812 status_t rc = camera->sendCommand(CAMERA_CMD_ENABLE_SHUTTER_SOUND, value, 0); 813 if (rc == NO_ERROR) { 814 return JNI_TRUE; 815 } else if (rc == PERMISSION_DENIED) { 816 return JNI_FALSE; 817 } else { 818 jniThrowRuntimeException(env, "enable shutter sound failed"); 819 return JNI_FALSE; 820 } 821} 822 823static void android_hardware_Camera_startFaceDetection(JNIEnv *env, jobject thiz, 824 jint type) 825{ 826 ALOGV("startFaceDetection"); 827 JNICameraContext* context; 828 sp<Camera> camera = get_native_camera(env, thiz, &context); 829 if (camera == 0) return; 830 831 status_t rc = camera->sendCommand(CAMERA_CMD_START_FACE_DETECTION, type, 0); 832 if (rc == BAD_VALUE) { 833 char msg[64]; 834 snprintf(msg, sizeof(msg), "invalid face detection type=%d", type); 835 jniThrowException(env, "java/lang/IllegalArgumentException", msg); 836 } else if (rc != NO_ERROR) { 837 jniThrowRuntimeException(env, "start face detection failed"); 838 } 839} 840 841static void android_hardware_Camera_stopFaceDetection(JNIEnv *env, jobject thiz) 842{ 843 ALOGV("stopFaceDetection"); 844 sp<Camera> camera = get_native_camera(env, thiz, NULL); 845 if (camera == 0) return; 846 847 if (camera->sendCommand(CAMERA_CMD_STOP_FACE_DETECTION, 0, 0) != NO_ERROR) { 848 jniThrowRuntimeException(env, "stop face detection failed"); 849 } 850} 851 852static void android_hardware_Camera_enableFocusMoveCallback(JNIEnv *env, jobject thiz, jint enable) 853{ 854 ALOGV("enableFocusMoveCallback"); 855 sp<Camera> camera = get_native_camera(env, thiz, NULL); 856 if (camera == 0) return; 857 858 if (camera->sendCommand(CAMERA_CMD_ENABLE_FOCUS_MOVE_MSG, enable, 0) != NO_ERROR) { 859 jniThrowRuntimeException(env, "enable focus move callback failed"); 860 } 861} 862 863//------------------------------------------------- 864 865static JNINativeMethod camMethods[] = { 866 { "getNumberOfCameras", 867 "()I", 868 (void *)android_hardware_Camera_getNumberOfCameras }, 869 { "_getCameraInfo", 870 "(ILandroid/hardware/Camera$CameraInfo;)V", 871 (void*)android_hardware_Camera_getCameraInfo }, 872 { "native_setup", 873 "(Ljava/lang/Object;ILjava/lang/String;)V", 874 (void*)android_hardware_Camera_native_setup }, 875 { "native_release", 876 "()V", 877 (void*)android_hardware_Camera_release }, 878 { "setPreviewDisplay", 879 "(Landroid/view/Surface;)V", 880 (void *)android_hardware_Camera_setPreviewDisplay }, 881 { "setPreviewTexture", 882 "(Landroid/graphics/SurfaceTexture;)V", 883 (void *)android_hardware_Camera_setPreviewTexture }, 884 { "startPreview", 885 "()V", 886 (void *)android_hardware_Camera_startPreview }, 887 { "_stopPreview", 888 "()V", 889 (void *)android_hardware_Camera_stopPreview }, 890 { "previewEnabled", 891 "()Z", 892 (void *)android_hardware_Camera_previewEnabled }, 893 { "setHasPreviewCallback", 894 "(ZZ)V", 895 (void *)android_hardware_Camera_setHasPreviewCallback }, 896 { "_addCallbackBuffer", 897 "([BI)V", 898 (void *)android_hardware_Camera_addCallbackBuffer }, 899 { "native_autoFocus", 900 "()V", 901 (void *)android_hardware_Camera_autoFocus }, 902 { "native_cancelAutoFocus", 903 "()V", 904 (void *)android_hardware_Camera_cancelAutoFocus }, 905 { "native_takePicture", 906 "(I)V", 907 (void *)android_hardware_Camera_takePicture }, 908 { "native_setParameters", 909 "(Ljava/lang/String;)V", 910 (void *)android_hardware_Camera_setParameters }, 911 { "native_getParameters", 912 "()Ljava/lang/String;", 913 (void *)android_hardware_Camera_getParameters }, 914 { "reconnect", 915 "()V", 916 (void*)android_hardware_Camera_reconnect }, 917 { "lock", 918 "()V", 919 (void*)android_hardware_Camera_lock }, 920 { "unlock", 921 "()V", 922 (void*)android_hardware_Camera_unlock }, 923 { "startSmoothZoom", 924 "(I)V", 925 (void *)android_hardware_Camera_startSmoothZoom }, 926 { "stopSmoothZoom", 927 "()V", 928 (void *)android_hardware_Camera_stopSmoothZoom }, 929 { "setDisplayOrientation", 930 "(I)V", 931 (void *)android_hardware_Camera_setDisplayOrientation }, 932 { "_enableShutterSound", 933 "(Z)Z", 934 (void *)android_hardware_Camera_enableShutterSound }, 935 { "_startFaceDetection", 936 "(I)V", 937 (void *)android_hardware_Camera_startFaceDetection }, 938 { "_stopFaceDetection", 939 "()V", 940 (void *)android_hardware_Camera_stopFaceDetection}, 941 { "enableFocusMoveCallback", 942 "(I)V", 943 (void *)android_hardware_Camera_enableFocusMoveCallback}, 944}; 945 946struct field { 947 const char *class_name; 948 const char *field_name; 949 const char *field_type; 950 jfieldID *jfield; 951}; 952 953static int find_fields(JNIEnv *env, field *fields, int count) 954{ 955 for (int i = 0; i < count; i++) { 956 field *f = &fields[i]; 957 jclass clazz = env->FindClass(f->class_name); 958 if (clazz == NULL) { 959 ALOGE("Can't find %s", f->class_name); 960 return -1; 961 } 962 963 jfieldID field = env->GetFieldID(clazz, f->field_name, f->field_type); 964 if (field == NULL) { 965 ALOGE("Can't find %s.%s", f->class_name, f->field_name); 966 return -1; 967 } 968 969 *(f->jfield) = field; 970 } 971 972 return 0; 973} 974 975// Get all the required offsets in java class and register native functions 976int register_android_hardware_Camera(JNIEnv *env) 977{ 978 field fields_to_find[] = { 979 { "android/hardware/Camera", "mNativeContext", "I", &fields.context }, 980 { "android/hardware/Camera$CameraInfo", "facing", "I", &fields.facing }, 981 { "android/hardware/Camera$CameraInfo", "orientation", "I", &fields.orientation }, 982 { "android/hardware/Camera$CameraInfo", "canDisableShutterSound", "Z", 983 &fields.canDisableShutterSound }, 984 { "android/hardware/Camera$Face", "rect", "Landroid/graphics/Rect;", &fields.face_rect }, 985 { "android/hardware/Camera$Face", "score", "I", &fields.face_score }, 986 { "android/graphics/Rect", "left", "I", &fields.rect_left }, 987 { "android/graphics/Rect", "top", "I", &fields.rect_top }, 988 { "android/graphics/Rect", "right", "I", &fields.rect_right }, 989 { "android/graphics/Rect", "bottom", "I", &fields.rect_bottom }, 990 }; 991 992 if (find_fields(env, fields_to_find, NELEM(fields_to_find)) < 0) 993 return -1; 994 995 jclass clazz = env->FindClass("android/hardware/Camera"); 996 fields.post_event = env->GetStaticMethodID(clazz, "postEventFromNative", 997 "(Ljava/lang/Object;IIILjava/lang/Object;)V"); 998 if (fields.post_event == NULL) { 999 ALOGE("Can't find android/hardware/Camera.postEventFromNative"); 1000 return -1; 1001 } 1002 1003 clazz = env->FindClass("android/graphics/Rect"); 1004 fields.rect_constructor = env->GetMethodID(clazz, "<init>", "()V"); 1005 if (fields.rect_constructor == NULL) { 1006 ALOGE("Can't find android/graphics/Rect.Rect()"); 1007 return -1; 1008 } 1009 1010 clazz = env->FindClass("android/hardware/Camera$Face"); 1011 fields.face_constructor = env->GetMethodID(clazz, "<init>", "()V"); 1012 if (fields.face_constructor == NULL) { 1013 ALOGE("Can't find android/hardware/Camera$Face.Face()"); 1014 return -1; 1015 } 1016 1017 // Register native functions 1018 return AndroidRuntime::registerNativeMethods(env, "android/hardware/Camera", 1019 camMethods, NELEM(camMethods)); 1020} 1021