android_hardware_Camera.cpp revision aa70f2217cd01e4f09e35c3bf450b20682563378
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) 469{ 470 sp<Camera> camera = Camera::connect(cameraId); 471 472 if (camera == NULL) { 473 jniThrowRuntimeException(env, "Fail to connect to camera service"); 474 return; 475 } 476 477 // make sure camera hardware is alive 478 if (camera->getStatus() != NO_ERROR) { 479 jniThrowRuntimeException(env, "Camera initialization failed"); 480 return; 481 } 482 483 jclass clazz = env->GetObjectClass(thiz); 484 if (clazz == NULL) { 485 jniThrowRuntimeException(env, "Can't find android/hardware/Camera"); 486 return; 487 } 488 489 // We use a weak reference so the Camera object can be garbage collected. 490 // The reference is only used as a proxy for callbacks. 491 sp<JNICameraContext> context = new JNICameraContext(env, weak_this, clazz, camera); 492 context->incStrong(thiz); 493 camera->setListener(context); 494 495 // save context in opaque field 496 env->SetIntField(thiz, fields.context, (int)context.get()); 497} 498 499// disconnect from camera service 500// It's okay to call this when the native camera context is already null. 501// This handles the case where the user has called release() and the 502// finalizer is invoked later. 503static void android_hardware_Camera_release(JNIEnv *env, jobject thiz) 504{ 505 // TODO: Change to ALOGV 506 ALOGV("release camera"); 507 JNICameraContext* context = NULL; 508 sp<Camera> camera; 509 { 510 Mutex::Autolock _l(sLock); 511 context = reinterpret_cast<JNICameraContext*>(env->GetIntField(thiz, fields.context)); 512 513 // Make sure we do not attempt to callback on a deleted Java object. 514 env->SetIntField(thiz, fields.context, 0); 515 } 516 517 // clean up if release has not been called before 518 if (context != NULL) { 519 camera = context->getCamera(); 520 context->release(); 521 ALOGV("native_release: context=%p camera=%p", context, camera.get()); 522 523 // clear callbacks 524 if (camera != NULL) { 525 camera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_NOOP); 526 camera->disconnect(); 527 } 528 529 // remove context to prevent further Java access 530 context->decStrong(thiz); 531 } 532} 533 534static void android_hardware_Camera_setPreviewDisplay(JNIEnv *env, jobject thiz, jobject jSurface) 535{ 536 ALOGV("setPreviewDisplay"); 537 sp<Camera> camera = get_native_camera(env, thiz, NULL); 538 if (camera == 0) return; 539 540 sp<Surface> surface; 541 if (jSurface) { 542 surface = android_view_Surface_getSurface(env, jSurface); 543 } 544 545 if (camera->setPreviewDisplay(surface) != NO_ERROR) { 546 jniThrowException(env, "java/io/IOException", "setPreviewDisplay failed"); 547 } 548} 549 550static void android_hardware_Camera_setPreviewTexture(JNIEnv *env, 551 jobject thiz, jobject jSurfaceTexture) 552{ 553 ALOGV("setPreviewTexture"); 554 sp<Camera> camera = get_native_camera(env, thiz, NULL); 555 if (camera == 0) return; 556 557 sp<BufferQueue> bufferQueue = NULL; 558 if (jSurfaceTexture != NULL) { 559 sp<GLConsumer> surfaceTexture = 560 SurfaceTexture_getSurfaceTexture(env, jSurfaceTexture); 561 if (surfaceTexture != NULL) { 562 bufferQueue = surfaceTexture->getBufferQueue(); 563 } 564 else { 565 jniThrowException(env, "java/lang/IllegalArgumentException", 566 "SurfaceTexture already released in setPreviewTexture"); 567 return; 568 } 569 570 } 571 572 if (camera->setPreviewTexture(bufferQueue) != NO_ERROR) { 573 jniThrowException(env, "java/io/IOException", 574 "setPreviewTexture failed"); 575 } 576} 577 578static void android_hardware_Camera_startPreview(JNIEnv *env, jobject thiz) 579{ 580 ALOGV("startPreview"); 581 sp<Camera> camera = get_native_camera(env, thiz, NULL); 582 if (camera == 0) return; 583 584 if (camera->startPreview() != NO_ERROR) { 585 jniThrowRuntimeException(env, "startPreview failed"); 586 return; 587 } 588} 589 590static void android_hardware_Camera_stopPreview(JNIEnv *env, jobject thiz) 591{ 592 ALOGV("stopPreview"); 593 sp<Camera> c = get_native_camera(env, thiz, NULL); 594 if (c == 0) return; 595 596 c->stopPreview(); 597} 598 599static bool android_hardware_Camera_previewEnabled(JNIEnv *env, jobject thiz) 600{ 601 ALOGV("previewEnabled"); 602 sp<Camera> c = get_native_camera(env, thiz, NULL); 603 if (c == 0) return false; 604 605 return c->previewEnabled(); 606} 607 608static void android_hardware_Camera_setHasPreviewCallback(JNIEnv *env, jobject thiz, jboolean installed, jboolean manualBuffer) 609{ 610 ALOGV("setHasPreviewCallback: installed:%d, manualBuffer:%d", (int)installed, (int)manualBuffer); 611 // Important: Only install preview_callback if the Java code has called 612 // setPreviewCallback() with a non-null value, otherwise we'd pay to memcpy 613 // each preview frame for nothing. 614 JNICameraContext* context; 615 sp<Camera> camera = get_native_camera(env, thiz, &context); 616 if (camera == 0) return; 617 618 // setCallbackMode will take care of setting the context flags and calling 619 // camera->setPreviewCallbackFlags within a mutex for us. 620 context->setCallbackMode(env, installed, manualBuffer); 621} 622 623static void android_hardware_Camera_addCallbackBuffer(JNIEnv *env, jobject thiz, jbyteArray bytes, int msgType) { 624 ALOGV("addCallbackBuffer: 0x%x", msgType); 625 626 JNICameraContext* context = reinterpret_cast<JNICameraContext*>(env->GetIntField(thiz, fields.context)); 627 628 if (context != NULL) { 629 context->addCallbackBuffer(env, bytes, msgType); 630 } 631} 632 633static void android_hardware_Camera_autoFocus(JNIEnv *env, jobject thiz) 634{ 635 ALOGV("autoFocus"); 636 JNICameraContext* context; 637 sp<Camera> c = get_native_camera(env, thiz, &context); 638 if (c == 0) return; 639 640 if (c->autoFocus() != NO_ERROR) { 641 jniThrowRuntimeException(env, "autoFocus failed"); 642 } 643} 644 645static void android_hardware_Camera_cancelAutoFocus(JNIEnv *env, jobject thiz) 646{ 647 ALOGV("cancelAutoFocus"); 648 JNICameraContext* context; 649 sp<Camera> c = get_native_camera(env, thiz, &context); 650 if (c == 0) return; 651 652 if (c->cancelAutoFocus() != NO_ERROR) { 653 jniThrowRuntimeException(env, "cancelAutoFocus failed"); 654 } 655} 656 657static void android_hardware_Camera_takePicture(JNIEnv *env, jobject thiz, int msgType) 658{ 659 ALOGV("takePicture"); 660 JNICameraContext* context; 661 sp<Camera> camera = get_native_camera(env, thiz, &context); 662 if (camera == 0) return; 663 664 /* 665 * When CAMERA_MSG_RAW_IMAGE is requested, if the raw image callback 666 * buffer is available, CAMERA_MSG_RAW_IMAGE is enabled to get the 667 * notification _and_ the data; otherwise, CAMERA_MSG_RAW_IMAGE_NOTIFY 668 * is enabled to receive the callback notification but no data. 669 * 670 * Note that CAMERA_MSG_RAW_IMAGE_NOTIFY is not exposed to the 671 * Java application. 672 */ 673 if (msgType & CAMERA_MSG_RAW_IMAGE) { 674 ALOGV("Enable raw image callback buffer"); 675 if (!context->isRawImageCallbackBufferAvailable()) { 676 ALOGV("Enable raw image notification, since no callback buffer exists"); 677 msgType &= ~CAMERA_MSG_RAW_IMAGE; 678 msgType |= CAMERA_MSG_RAW_IMAGE_NOTIFY; 679 } 680 } 681 682 if (camera->takePicture(msgType) != NO_ERROR) { 683 jniThrowRuntimeException(env, "takePicture failed"); 684 return; 685 } 686} 687 688static void android_hardware_Camera_setParameters(JNIEnv *env, jobject thiz, jstring params) 689{ 690 ALOGV("setParameters"); 691 sp<Camera> camera = get_native_camera(env, thiz, NULL); 692 if (camera == 0) return; 693 694 const jchar* str = env->GetStringCritical(params, 0); 695 String8 params8; 696 if (params) { 697 params8 = String8(str, env->GetStringLength(params)); 698 env->ReleaseStringCritical(params, str); 699 } 700 if (camera->setParameters(params8) != NO_ERROR) { 701 jniThrowRuntimeException(env, "setParameters failed"); 702 return; 703 } 704} 705 706static jstring android_hardware_Camera_getParameters(JNIEnv *env, jobject thiz) 707{ 708 ALOGV("getParameters"); 709 sp<Camera> camera = get_native_camera(env, thiz, NULL); 710 if (camera == 0) return 0; 711 712 String8 params8 = camera->getParameters(); 713 if (params8.isEmpty()) { 714 jniThrowRuntimeException(env, "getParameters failed (empty parameters)"); 715 return 0; 716 } 717 return env->NewStringUTF(params8.string()); 718} 719 720static void android_hardware_Camera_reconnect(JNIEnv *env, jobject thiz) 721{ 722 ALOGV("reconnect"); 723 sp<Camera> camera = get_native_camera(env, thiz, NULL); 724 if (camera == 0) return; 725 726 if (camera->reconnect() != NO_ERROR) { 727 jniThrowException(env, "java/io/IOException", "reconnect failed"); 728 return; 729 } 730} 731 732static void android_hardware_Camera_lock(JNIEnv *env, jobject thiz) 733{ 734 ALOGV("lock"); 735 sp<Camera> camera = get_native_camera(env, thiz, NULL); 736 if (camera == 0) return; 737 738 if (camera->lock() != NO_ERROR) { 739 jniThrowRuntimeException(env, "lock failed"); 740 } 741} 742 743static void android_hardware_Camera_unlock(JNIEnv *env, jobject thiz) 744{ 745 ALOGV("unlock"); 746 sp<Camera> camera = get_native_camera(env, thiz, NULL); 747 if (camera == 0) return; 748 749 if (camera->unlock() != NO_ERROR) { 750 jniThrowRuntimeException(env, "unlock failed"); 751 } 752} 753 754static void android_hardware_Camera_startSmoothZoom(JNIEnv *env, jobject thiz, jint value) 755{ 756 ALOGV("startSmoothZoom"); 757 sp<Camera> camera = get_native_camera(env, thiz, NULL); 758 if (camera == 0) return; 759 760 status_t rc = camera->sendCommand(CAMERA_CMD_START_SMOOTH_ZOOM, value, 0); 761 if (rc == BAD_VALUE) { 762 char msg[64]; 763 sprintf(msg, "invalid zoom value=%d", value); 764 jniThrowException(env, "java/lang/IllegalArgumentException", msg); 765 } else if (rc != NO_ERROR) { 766 jniThrowRuntimeException(env, "start smooth zoom failed"); 767 } 768} 769 770static void android_hardware_Camera_stopSmoothZoom(JNIEnv *env, jobject thiz) 771{ 772 ALOGV("stopSmoothZoom"); 773 sp<Camera> camera = get_native_camera(env, thiz, NULL); 774 if (camera == 0) return; 775 776 if (camera->sendCommand(CAMERA_CMD_STOP_SMOOTH_ZOOM, 0, 0) != NO_ERROR) { 777 jniThrowRuntimeException(env, "stop smooth zoom failed"); 778 } 779} 780 781static void android_hardware_Camera_setDisplayOrientation(JNIEnv *env, jobject thiz, 782 jint value) 783{ 784 ALOGV("setDisplayOrientation"); 785 sp<Camera> camera = get_native_camera(env, thiz, NULL); 786 if (camera == 0) return; 787 788 if (camera->sendCommand(CAMERA_CMD_SET_DISPLAY_ORIENTATION, value, 0) != NO_ERROR) { 789 jniThrowRuntimeException(env, "set display orientation failed"); 790 } 791} 792 793static jboolean android_hardware_Camera_enableShutterSound(JNIEnv *env, jobject thiz, 794 jboolean enabled) 795{ 796 ALOGV("enableShutterSound"); 797 sp<Camera> camera = get_native_camera(env, thiz, NULL); 798 if (camera == 0) return JNI_FALSE; 799 800 int32_t value = (enabled == JNI_TRUE) ? 1 : 0; 801 status_t rc = camera->sendCommand(CAMERA_CMD_ENABLE_SHUTTER_SOUND, value, 0); 802 if (rc == NO_ERROR) { 803 return JNI_TRUE; 804 } else if (rc == PERMISSION_DENIED) { 805 return JNI_FALSE; 806 } else { 807 jniThrowRuntimeException(env, "enable shutter sound failed"); 808 return JNI_FALSE; 809 } 810} 811 812static void android_hardware_Camera_startFaceDetection(JNIEnv *env, jobject thiz, 813 jint type) 814{ 815 ALOGV("startFaceDetection"); 816 JNICameraContext* context; 817 sp<Camera> camera = get_native_camera(env, thiz, &context); 818 if (camera == 0) return; 819 820 status_t rc = camera->sendCommand(CAMERA_CMD_START_FACE_DETECTION, type, 0); 821 if (rc == BAD_VALUE) { 822 char msg[64]; 823 snprintf(msg, sizeof(msg), "invalid face detection type=%d", type); 824 jniThrowException(env, "java/lang/IllegalArgumentException", msg); 825 } else if (rc != NO_ERROR) { 826 jniThrowRuntimeException(env, "start face detection failed"); 827 } 828} 829 830static void android_hardware_Camera_stopFaceDetection(JNIEnv *env, jobject thiz) 831{ 832 ALOGV("stopFaceDetection"); 833 sp<Camera> camera = get_native_camera(env, thiz, NULL); 834 if (camera == 0) return; 835 836 if (camera->sendCommand(CAMERA_CMD_STOP_FACE_DETECTION, 0, 0) != NO_ERROR) { 837 jniThrowRuntimeException(env, "stop face detection failed"); 838 } 839} 840 841static void android_hardware_Camera_enableFocusMoveCallback(JNIEnv *env, jobject thiz, jint enable) 842{ 843 ALOGV("enableFocusMoveCallback"); 844 sp<Camera> camera = get_native_camera(env, thiz, NULL); 845 if (camera == 0) return; 846 847 if (camera->sendCommand(CAMERA_CMD_ENABLE_FOCUS_MOVE_MSG, enable, 0) != NO_ERROR) { 848 jniThrowRuntimeException(env, "enable focus move callback failed"); 849 } 850} 851 852//------------------------------------------------- 853 854static JNINativeMethod camMethods[] = { 855 { "getNumberOfCameras", 856 "()I", 857 (void *)android_hardware_Camera_getNumberOfCameras }, 858 { "_getCameraInfo", 859 "(ILandroid/hardware/Camera$CameraInfo;)V", 860 (void*)android_hardware_Camera_getCameraInfo }, 861 { "native_setup", 862 "(Ljava/lang/Object;I)V", 863 (void*)android_hardware_Camera_native_setup }, 864 { "native_release", 865 "()V", 866 (void*)android_hardware_Camera_release }, 867 { "setPreviewDisplay", 868 "(Landroid/view/Surface;)V", 869 (void *)android_hardware_Camera_setPreviewDisplay }, 870 { "setPreviewTexture", 871 "(Landroid/graphics/SurfaceTexture;)V", 872 (void *)android_hardware_Camera_setPreviewTexture }, 873 { "startPreview", 874 "()V", 875 (void *)android_hardware_Camera_startPreview }, 876 { "_stopPreview", 877 "()V", 878 (void *)android_hardware_Camera_stopPreview }, 879 { "previewEnabled", 880 "()Z", 881 (void *)android_hardware_Camera_previewEnabled }, 882 { "setHasPreviewCallback", 883 "(ZZ)V", 884 (void *)android_hardware_Camera_setHasPreviewCallback }, 885 { "_addCallbackBuffer", 886 "([BI)V", 887 (void *)android_hardware_Camera_addCallbackBuffer }, 888 { "native_autoFocus", 889 "()V", 890 (void *)android_hardware_Camera_autoFocus }, 891 { "native_cancelAutoFocus", 892 "()V", 893 (void *)android_hardware_Camera_cancelAutoFocus }, 894 { "native_takePicture", 895 "(I)V", 896 (void *)android_hardware_Camera_takePicture }, 897 { "native_setParameters", 898 "(Ljava/lang/String;)V", 899 (void *)android_hardware_Camera_setParameters }, 900 { "native_getParameters", 901 "()Ljava/lang/String;", 902 (void *)android_hardware_Camera_getParameters }, 903 { "reconnect", 904 "()V", 905 (void*)android_hardware_Camera_reconnect }, 906 { "lock", 907 "()V", 908 (void*)android_hardware_Camera_lock }, 909 { "unlock", 910 "()V", 911 (void*)android_hardware_Camera_unlock }, 912 { "startSmoothZoom", 913 "(I)V", 914 (void *)android_hardware_Camera_startSmoothZoom }, 915 { "stopSmoothZoom", 916 "()V", 917 (void *)android_hardware_Camera_stopSmoothZoom }, 918 { "setDisplayOrientation", 919 "(I)V", 920 (void *)android_hardware_Camera_setDisplayOrientation }, 921 { "_enableShutterSound", 922 "(Z)Z", 923 (void *)android_hardware_Camera_enableShutterSound }, 924 { "_startFaceDetection", 925 "(I)V", 926 (void *)android_hardware_Camera_startFaceDetection }, 927 { "_stopFaceDetection", 928 "()V", 929 (void *)android_hardware_Camera_stopFaceDetection}, 930 { "enableFocusMoveCallback", 931 "(I)V", 932 (void *)android_hardware_Camera_enableFocusMoveCallback}, 933}; 934 935struct field { 936 const char *class_name; 937 const char *field_name; 938 const char *field_type; 939 jfieldID *jfield; 940}; 941 942static int find_fields(JNIEnv *env, field *fields, int count) 943{ 944 for (int i = 0; i < count; i++) { 945 field *f = &fields[i]; 946 jclass clazz = env->FindClass(f->class_name); 947 if (clazz == NULL) { 948 ALOGE("Can't find %s", f->class_name); 949 return -1; 950 } 951 952 jfieldID field = env->GetFieldID(clazz, f->field_name, f->field_type); 953 if (field == NULL) { 954 ALOGE("Can't find %s.%s", f->class_name, f->field_name); 955 return -1; 956 } 957 958 *(f->jfield) = field; 959 } 960 961 return 0; 962} 963 964// Get all the required offsets in java class and register native functions 965int register_android_hardware_Camera(JNIEnv *env) 966{ 967 field fields_to_find[] = { 968 { "android/hardware/Camera", "mNativeContext", "I", &fields.context }, 969 { "android/hardware/Camera$CameraInfo", "facing", "I", &fields.facing }, 970 { "android/hardware/Camera$CameraInfo", "orientation", "I", &fields.orientation }, 971 { "android/hardware/Camera$CameraInfo", "canDisableShutterSound", "Z", 972 &fields.canDisableShutterSound }, 973 { "android/hardware/Camera$Face", "rect", "Landroid/graphics/Rect;", &fields.face_rect }, 974 { "android/hardware/Camera$Face", "score", "I", &fields.face_score }, 975 { "android/graphics/Rect", "left", "I", &fields.rect_left }, 976 { "android/graphics/Rect", "top", "I", &fields.rect_top }, 977 { "android/graphics/Rect", "right", "I", &fields.rect_right }, 978 { "android/graphics/Rect", "bottom", "I", &fields.rect_bottom }, 979 }; 980 981 if (find_fields(env, fields_to_find, NELEM(fields_to_find)) < 0) 982 return -1; 983 984 jclass clazz = env->FindClass("android/hardware/Camera"); 985 fields.post_event = env->GetStaticMethodID(clazz, "postEventFromNative", 986 "(Ljava/lang/Object;IIILjava/lang/Object;)V"); 987 if (fields.post_event == NULL) { 988 ALOGE("Can't find android/hardware/Camera.postEventFromNative"); 989 return -1; 990 } 991 992 clazz = env->FindClass("android/graphics/Rect"); 993 fields.rect_constructor = env->GetMethodID(clazz, "<init>", "()V"); 994 if (fields.rect_constructor == NULL) { 995 ALOGE("Can't find android/graphics/Rect.Rect()"); 996 return -1; 997 } 998 999 clazz = env->FindClass("android/hardware/Camera$Face"); 1000 fields.face_constructor = env->GetMethodID(clazz, "<init>", "()V"); 1001 if (fields.face_constructor == NULL) { 1002 ALOGE("Can't find android/hardware/Camera$Face.Face()"); 1003 return -1; 1004 } 1005 1006 // Register native functions 1007 return AndroidRuntime::registerNativeMethods(env, "android/hardware/Camera", 1008 camMethods, NELEM(camMethods)); 1009} 1010