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 "core_jni_helpers.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 #include <utils/Errors.h>
31
32 #include <gui/GLConsumer.h>
33 #include <gui/Surface.h>
34 #include <camera/Camera.h>
35 #include <binder/IMemory.h>
36
37 using namespace android;
38
39 enum {
40 // Keep up to date with Camera.java
41 CAMERA_HAL_API_VERSION_NORMAL_CONNECT = -2,
42 };
43
44 struct fields_t {
45 jfieldID context;
46 jfieldID facing;
47 jfieldID orientation;
48 jfieldID canDisableShutterSound;
49 jfieldID face_rect;
50 jfieldID face_score;
51 jfieldID face_id;
52 jfieldID face_left_eye;
53 jfieldID face_right_eye;
54 jfieldID face_mouth;
55 jfieldID rect_left;
56 jfieldID rect_top;
57 jfieldID rect_right;
58 jfieldID rect_bottom;
59 jfieldID point_x;
60 jfieldID point_y;
61 jmethodID post_event;
62 jmethodID rect_constructor;
63 jmethodID face_constructor;
64 jmethodID point_constructor;
65 };
66
67 static fields_t fields;
68 static Mutex sLock;
69
70 // provides persistent context for calls from native code to Java
71 class JNICameraContext: public CameraListener
72 {
73 public:
74 JNICameraContext(JNIEnv* env, jobject weak_this, jclass clazz, const sp<Camera>& camera);
~JNICameraContext()75 ~JNICameraContext() { release(); }
76 virtual void notify(int32_t msgType, int32_t ext1, int32_t ext2);
77 virtual void postData(int32_t msgType, const sp<IMemory>& dataPtr,
78 camera_frame_metadata_t *metadata);
79 virtual void postDataTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr);
80 virtual void postRecordingFrameHandleTimestamp(nsecs_t timestamp, native_handle_t* handle);
81 void postMetadata(JNIEnv *env, int32_t msgType, camera_frame_metadata_t *metadata);
82 void addCallbackBuffer(JNIEnv *env, jbyteArray cbb, int msgType);
83 void setCallbackMode(JNIEnv *env, bool installed, bool manualMode);
getCamera()84 sp<Camera> getCamera() { Mutex::Autolock _l(mLock); return mCamera; }
85 bool isRawImageCallbackBufferAvailable() const;
86 void release();
87
88 private:
89 void copyAndPost(JNIEnv* env, const sp<IMemory>& dataPtr, int msgType);
90 void clearCallbackBuffers_l(JNIEnv *env, Vector<jbyteArray> *buffers);
91 void clearCallbackBuffers_l(JNIEnv *env);
92 jbyteArray getCallbackBuffer(JNIEnv *env, Vector<jbyteArray> *buffers, size_t bufferSize);
93
94 jobject mCameraJObjectWeak; // weak reference to java object
95 jclass mCameraJClass; // strong reference to java class
96 sp<Camera> mCamera; // strong reference to native object
97 jclass mFaceClass; // strong reference to Face class
98 jclass mRectClass; // strong reference to Rect class
99 jclass mPointClass; // strong reference to Point class
100 Mutex mLock;
101
102 /*
103 * Global reference application-managed raw image buffer queue.
104 *
105 * Manual-only mode is supported for raw image callbacks, which is
106 * set whenever method addCallbackBuffer() with msgType =
107 * CAMERA_MSG_RAW_IMAGE is called; otherwise, null is returned
108 * with raw image callbacks.
109 */
110 Vector<jbyteArray> mRawImageCallbackBuffers;
111
112 /*
113 * Application-managed preview buffer queue and the flags
114 * associated with the usage of the preview buffer callback.
115 */
116 Vector<jbyteArray> mCallbackBuffers; // Global reference application managed byte[]
117 bool mManualBufferMode; // Whether to use application managed buffers.
118 bool mManualCameraCallbackSet; // Whether the callback has been set, used to
119 // reduce unnecessary calls to set the callback.
120 };
121
isRawImageCallbackBufferAvailable() const122 bool JNICameraContext::isRawImageCallbackBufferAvailable() const
123 {
124 return !mRawImageCallbackBuffers.isEmpty();
125 }
126
get_native_camera(JNIEnv * env,jobject thiz,JNICameraContext ** pContext)127 sp<Camera> get_native_camera(JNIEnv *env, jobject thiz, JNICameraContext** pContext)
128 {
129 sp<Camera> camera;
130 Mutex::Autolock _l(sLock);
131 JNICameraContext* context = reinterpret_cast<JNICameraContext*>(env->GetLongField(thiz, fields.context));
132 if (context != NULL) {
133 camera = context->getCamera();
134 }
135 ALOGV("get_native_camera: context=%p, camera=%p", context, camera.get());
136 if (camera == 0) {
137 jniThrowRuntimeException(env,
138 "Camera is being used after Camera.release() was called");
139 }
140
141 if (pContext != NULL) *pContext = context;
142 return camera;
143 }
144
JNICameraContext(JNIEnv * env,jobject weak_this,jclass clazz,const sp<Camera> & camera)145 JNICameraContext::JNICameraContext(JNIEnv* env, jobject weak_this, jclass clazz, const sp<Camera>& camera)
146 {
147 mCameraJObjectWeak = env->NewGlobalRef(weak_this);
148 mCameraJClass = (jclass)env->NewGlobalRef(clazz);
149 mCamera = camera;
150
151 jclass faceClazz = env->FindClass("android/hardware/Camera$Face");
152 mFaceClass = (jclass) env->NewGlobalRef(faceClazz);
153
154 jclass rectClazz = env->FindClass("android/graphics/Rect");
155 mRectClass = (jclass) env->NewGlobalRef(rectClazz);
156
157 jclass pointClazz = env->FindClass("android/graphics/Point");
158 mPointClass = (jclass) env->NewGlobalRef(pointClazz);
159
160 mManualBufferMode = false;
161 mManualCameraCallbackSet = false;
162 }
163
release()164 void JNICameraContext::release()
165 {
166 ALOGV("release");
167 Mutex::Autolock _l(mLock);
168 JNIEnv *env = AndroidRuntime::getJNIEnv();
169
170 if (mCameraJObjectWeak != NULL) {
171 env->DeleteGlobalRef(mCameraJObjectWeak);
172 mCameraJObjectWeak = NULL;
173 }
174 if (mCameraJClass != NULL) {
175 env->DeleteGlobalRef(mCameraJClass);
176 mCameraJClass = NULL;
177 }
178 if (mFaceClass != NULL) {
179 env->DeleteGlobalRef(mFaceClass);
180 mFaceClass = NULL;
181 }
182 if (mRectClass != NULL) {
183 env->DeleteGlobalRef(mRectClass);
184 mRectClass = NULL;
185 }
186 if (mPointClass != NULL) {
187 env->DeleteGlobalRef(mPointClass);
188 mPointClass = NULL;
189 }
190 clearCallbackBuffers_l(env);
191 mCamera.clear();
192 }
193
notify(int32_t msgType,int32_t ext1,int32_t ext2)194 void JNICameraContext::notify(int32_t msgType, int32_t ext1, int32_t ext2)
195 {
196 ALOGV("notify");
197
198 // VM pointer will be NULL if object is released
199 Mutex::Autolock _l(mLock);
200 if (mCameraJObjectWeak == NULL) {
201 ALOGW("callback on dead camera object");
202 return;
203 }
204 JNIEnv *env = AndroidRuntime::getJNIEnv();
205
206 /*
207 * If the notification or msgType is CAMERA_MSG_RAW_IMAGE_NOTIFY, change it
208 * to CAMERA_MSG_RAW_IMAGE since CAMERA_MSG_RAW_IMAGE_NOTIFY is not exposed
209 * to the Java app.
210 */
211 if (msgType == CAMERA_MSG_RAW_IMAGE_NOTIFY) {
212 msgType = CAMERA_MSG_RAW_IMAGE;
213 }
214
215 env->CallStaticVoidMethod(mCameraJClass, fields.post_event,
216 mCameraJObjectWeak, msgType, ext1, ext2, NULL);
217 }
218
getCallbackBuffer(JNIEnv * env,Vector<jbyteArray> * buffers,size_t bufferSize)219 jbyteArray JNICameraContext::getCallbackBuffer(
220 JNIEnv* env, Vector<jbyteArray>* buffers, size_t bufferSize)
221 {
222 jbyteArray obj = NULL;
223
224 // Vector access should be protected by lock in postData()
225 if (!buffers->isEmpty()) {
226 ALOGV("Using callback buffer from queue of length %zu", buffers->size());
227 jbyteArray globalBuffer = buffers->itemAt(0);
228 buffers->removeAt(0);
229
230 obj = (jbyteArray)env->NewLocalRef(globalBuffer);
231 env->DeleteGlobalRef(globalBuffer);
232
233 if (obj != NULL) {
234 jsize bufferLength = env->GetArrayLength(obj);
235 if ((int)bufferLength < (int)bufferSize) {
236 ALOGE("Callback buffer was too small! Expected %zu bytes, but got %d bytes!",
237 bufferSize, bufferLength);
238 env->DeleteLocalRef(obj);
239 return NULL;
240 }
241 }
242 }
243
244 return obj;
245 }
246
copyAndPost(JNIEnv * env,const sp<IMemory> & dataPtr,int msgType)247 void JNICameraContext::copyAndPost(JNIEnv* env, const sp<IMemory>& dataPtr, int msgType)
248 {
249 jbyteArray obj = NULL;
250
251 // allocate Java byte array and copy data
252 if (dataPtr != NULL) {
253 ssize_t offset;
254 size_t size;
255 sp<IMemoryHeap> heap = dataPtr->getMemory(&offset, &size);
256 ALOGV("copyAndPost: off=%zd, size=%zu", offset, size);
257 uint8_t *heapBase = (uint8_t*)heap->base();
258
259 if (heapBase != NULL) {
260 const jbyte* data = reinterpret_cast<const jbyte*>(heapBase + offset);
261
262 if (msgType == CAMERA_MSG_RAW_IMAGE) {
263 obj = getCallbackBuffer(env, &mRawImageCallbackBuffers, size);
264 } else if (msgType == CAMERA_MSG_PREVIEW_FRAME && mManualBufferMode) {
265 obj = getCallbackBuffer(env, &mCallbackBuffers, size);
266
267 if (mCallbackBuffers.isEmpty()) {
268 ALOGV("Out of buffers, clearing callback!");
269 mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_NOOP);
270 mManualCameraCallbackSet = false;
271
272 if (obj == NULL) {
273 return;
274 }
275 }
276 } else {
277 ALOGV("Allocating callback buffer");
278 obj = env->NewByteArray(size);
279 }
280
281 if (obj == NULL) {
282 ALOGE("Couldn't allocate byte array for JPEG data");
283 env->ExceptionClear();
284 } else {
285 env->SetByteArrayRegion(obj, 0, size, data);
286 }
287 } else {
288 ALOGE("image heap is NULL");
289 }
290 }
291
292 // post image data to Java
293 env->CallStaticVoidMethod(mCameraJClass, fields.post_event,
294 mCameraJObjectWeak, msgType, 0, 0, obj);
295 if (obj) {
296 env->DeleteLocalRef(obj);
297 }
298 }
299
postData(int32_t msgType,const sp<IMemory> & dataPtr,camera_frame_metadata_t * metadata)300 void JNICameraContext::postData(int32_t msgType, const sp<IMemory>& dataPtr,
301 camera_frame_metadata_t *metadata)
302 {
303 // VM pointer will be NULL if object is released
304 Mutex::Autolock _l(mLock);
305 JNIEnv *env = AndroidRuntime::getJNIEnv();
306 if (mCameraJObjectWeak == NULL) {
307 ALOGW("callback on dead camera object");
308 return;
309 }
310
311 int32_t dataMsgType = msgType & ~CAMERA_MSG_PREVIEW_METADATA;
312
313 // return data based on callback type
314 switch (dataMsgType) {
315 case CAMERA_MSG_VIDEO_FRAME:
316 // should never happen
317 break;
318
319 // For backward-compatibility purpose, if there is no callback
320 // buffer for raw image, the callback returns null.
321 case CAMERA_MSG_RAW_IMAGE:
322 ALOGV("rawCallback");
323 if (mRawImageCallbackBuffers.isEmpty()) {
324 env->CallStaticVoidMethod(mCameraJClass, fields.post_event,
325 mCameraJObjectWeak, dataMsgType, 0, 0, NULL);
326 } else {
327 copyAndPost(env, dataPtr, dataMsgType);
328 }
329 break;
330
331 // There is no data.
332 case 0:
333 break;
334
335 default:
336 ALOGV("dataCallback(%d, %p)", dataMsgType, dataPtr.get());
337 copyAndPost(env, dataPtr, dataMsgType);
338 break;
339 }
340
341 // post frame metadata to Java
342 if (metadata && (msgType & CAMERA_MSG_PREVIEW_METADATA)) {
343 postMetadata(env, CAMERA_MSG_PREVIEW_METADATA, metadata);
344 }
345 }
346
postDataTimestamp(nsecs_t timestamp,int32_t msgType,const sp<IMemory> & dataPtr)347 void JNICameraContext::postDataTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr)
348 {
349 // TODO: plumb up to Java. For now, just drop the timestamp
350 postData(msgType, dataPtr, NULL);
351 }
352
postRecordingFrameHandleTimestamp(nsecs_t,native_handle_t *)353 void JNICameraContext::postRecordingFrameHandleTimestamp(nsecs_t, native_handle_t*) {
354 // This is not needed at app layer. This should not be called because JNICameraContext cannot
355 // start video recording.
356 }
357
postMetadata(JNIEnv * env,int32_t msgType,camera_frame_metadata_t * metadata)358 void JNICameraContext::postMetadata(JNIEnv *env, int32_t msgType, camera_frame_metadata_t *metadata)
359 {
360 jobjectArray obj = NULL;
361 obj = (jobjectArray) env->NewObjectArray(metadata->number_of_faces,
362 mFaceClass, NULL);
363 if (obj == NULL) {
364 ALOGE("Couldn't allocate face metadata array");
365 return;
366 }
367
368 for (int i = 0; i < metadata->number_of_faces; i++) {
369 jobject face = env->NewObject(mFaceClass, fields.face_constructor);
370 env->SetObjectArrayElement(obj, i, face);
371
372 jobject rect = env->NewObject(mRectClass, fields.rect_constructor);
373 env->SetIntField(rect, fields.rect_left, metadata->faces[i].rect[0]);
374 env->SetIntField(rect, fields.rect_top, metadata->faces[i].rect[1]);
375 env->SetIntField(rect, fields.rect_right, metadata->faces[i].rect[2]);
376 env->SetIntField(rect, fields.rect_bottom, metadata->faces[i].rect[3]);
377
378 env->SetObjectField(face, fields.face_rect, rect);
379 env->SetIntField(face, fields.face_score, metadata->faces[i].score);
380
381 bool optionalFields = metadata->faces[i].id != 0
382 && metadata->faces[i].left_eye[0] != -2000 && metadata->faces[i].left_eye[1] != -2000
383 && metadata->faces[i].right_eye[0] != -2000 && metadata->faces[i].right_eye[1] != -2000
384 && metadata->faces[i].mouth[0] != -2000 && metadata->faces[i].mouth[1] != -2000;
385 if (optionalFields) {
386 int32_t id = metadata->faces[i].id;
387 env->SetIntField(face, fields.face_id, id);
388
389 jobject leftEye = env->NewObject(mPointClass, fields.point_constructor);
390 env->SetIntField(leftEye, fields.point_x, metadata->faces[i].left_eye[0]);
391 env->SetIntField(leftEye, fields.point_y, metadata->faces[i].left_eye[1]);
392 env->SetObjectField(face, fields.face_left_eye, leftEye);
393 env->DeleteLocalRef(leftEye);
394
395 jobject rightEye = env->NewObject(mPointClass, fields.point_constructor);
396 env->SetIntField(rightEye, fields.point_x, metadata->faces[i].right_eye[0]);
397 env->SetIntField(rightEye, fields.point_y, metadata->faces[i].right_eye[1]);
398 env->SetObjectField(face, fields.face_right_eye, rightEye);
399 env->DeleteLocalRef(rightEye);
400
401 jobject mouth = env->NewObject(mPointClass, fields.point_constructor);
402 env->SetIntField(mouth, fields.point_x, metadata->faces[i].mouth[0]);
403 env->SetIntField(mouth, fields.point_y, metadata->faces[i].mouth[1]);
404 env->SetObjectField(face, fields.face_mouth, mouth);
405 env->DeleteLocalRef(mouth);
406 }
407
408 env->DeleteLocalRef(face);
409 env->DeleteLocalRef(rect);
410 }
411 env->CallStaticVoidMethod(mCameraJClass, fields.post_event,
412 mCameraJObjectWeak, msgType, 0, 0, obj);
413 env->DeleteLocalRef(obj);
414 }
415
setCallbackMode(JNIEnv * env,bool installed,bool manualMode)416 void JNICameraContext::setCallbackMode(JNIEnv *env, bool installed, bool manualMode)
417 {
418 Mutex::Autolock _l(mLock);
419 mManualBufferMode = manualMode;
420 mManualCameraCallbackSet = false;
421
422 // In order to limit the over usage of binder threads, all non-manual buffer
423 // callbacks use CAMERA_FRAME_CALLBACK_FLAG_BARCODE_SCANNER mode now.
424 //
425 // Continuous callbacks will have the callback re-registered from handleMessage.
426 // Manual buffer mode will operate as fast as possible, relying on the finite supply
427 // of buffers for throttling.
428
429 if (!installed) {
430 mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_NOOP);
431 clearCallbackBuffers_l(env, &mCallbackBuffers);
432 } else if (mManualBufferMode) {
433 if (!mCallbackBuffers.isEmpty()) {
434 mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_CAMERA);
435 mManualCameraCallbackSet = true;
436 }
437 } else {
438 mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_BARCODE_SCANNER);
439 clearCallbackBuffers_l(env, &mCallbackBuffers);
440 }
441 }
442
addCallbackBuffer(JNIEnv * env,jbyteArray cbb,int msgType)443 void JNICameraContext::addCallbackBuffer(
444 JNIEnv *env, jbyteArray cbb, int msgType)
445 {
446 ALOGV("addCallbackBuffer: 0x%x", msgType);
447 if (cbb != NULL) {
448 Mutex::Autolock _l(mLock);
449 switch (msgType) {
450 case CAMERA_MSG_PREVIEW_FRAME: {
451 jbyteArray callbackBuffer = (jbyteArray)env->NewGlobalRef(cbb);
452 mCallbackBuffers.push(callbackBuffer);
453
454 ALOGV("Adding callback buffer to queue, %zu total",
455 mCallbackBuffers.size());
456
457 // We want to make sure the camera knows we're ready for the
458 // next frame. This may have come unset had we not had a
459 // callbackbuffer ready for it last time.
460 if (mManualBufferMode && !mManualCameraCallbackSet) {
461 mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_CAMERA);
462 mManualCameraCallbackSet = true;
463 }
464 break;
465 }
466 case CAMERA_MSG_RAW_IMAGE: {
467 jbyteArray callbackBuffer = (jbyteArray)env->NewGlobalRef(cbb);
468 mRawImageCallbackBuffers.push(callbackBuffer);
469 break;
470 }
471 default: {
472 jniThrowException(env,
473 "java/lang/IllegalArgumentException",
474 "Unsupported message type");
475 return;
476 }
477 }
478 } else {
479 ALOGE("Null byte array!");
480 }
481 }
482
clearCallbackBuffers_l(JNIEnv * env)483 void JNICameraContext::clearCallbackBuffers_l(JNIEnv *env)
484 {
485 clearCallbackBuffers_l(env, &mCallbackBuffers);
486 clearCallbackBuffers_l(env, &mRawImageCallbackBuffers);
487 }
488
clearCallbackBuffers_l(JNIEnv * env,Vector<jbyteArray> * buffers)489 void JNICameraContext::clearCallbackBuffers_l(JNIEnv *env, Vector<jbyteArray> *buffers) {
490 ALOGV("Clearing callback buffers, %zu remained", buffers->size());
491 while (!buffers->isEmpty()) {
492 env->DeleteGlobalRef(buffers->top());
493 buffers->pop();
494 }
495 }
496
android_hardware_Camera_getNumberOfCameras(JNIEnv * env,jobject thiz)497 static jint android_hardware_Camera_getNumberOfCameras(JNIEnv *env, jobject thiz)
498 {
499 return Camera::getNumberOfCameras();
500 }
501
android_hardware_Camera_getCameraInfo(JNIEnv * env,jobject thiz,jint cameraId,jobject info_obj)502 static void android_hardware_Camera_getCameraInfo(JNIEnv *env, jobject thiz,
503 jint cameraId, jobject info_obj)
504 {
505 CameraInfo cameraInfo;
506 if (cameraId >= Camera::getNumberOfCameras() || cameraId < 0) {
507 ALOGE("%s: Unknown camera ID %d", __FUNCTION__, cameraId);
508 jniThrowRuntimeException(env, "Unknown camera ID");
509 return;
510 }
511
512 status_t rc = Camera::getCameraInfo(cameraId, &cameraInfo);
513 if (rc != NO_ERROR) {
514 jniThrowRuntimeException(env, "Fail to get camera info");
515 return;
516 }
517 env->SetIntField(info_obj, fields.facing, cameraInfo.facing);
518 env->SetIntField(info_obj, fields.orientation, cameraInfo.orientation);
519
520 char value[PROPERTY_VALUE_MAX];
521 property_get("ro.camera.sound.forced", value, "0");
522 jboolean canDisableShutterSound = (strncmp(value, "0", 2) == 0);
523 env->SetBooleanField(info_obj, fields.canDisableShutterSound,
524 canDisableShutterSound);
525 }
526
527 // connect to camera service
android_hardware_Camera_native_setup(JNIEnv * env,jobject thiz,jobject weak_this,jint cameraId,jint halVersion,jstring clientPackageName)528 static jint android_hardware_Camera_native_setup(JNIEnv *env, jobject thiz,
529 jobject weak_this, jint cameraId, jint halVersion, jstring clientPackageName)
530 {
531 // Convert jstring to String16
532 const char16_t *rawClientName = reinterpret_cast<const char16_t*>(
533 env->GetStringChars(clientPackageName, NULL));
534 jsize rawClientNameLen = env->GetStringLength(clientPackageName);
535 String16 clientName(rawClientName, rawClientNameLen);
536 env->ReleaseStringChars(clientPackageName,
537 reinterpret_cast<const jchar*>(rawClientName));
538
539 sp<Camera> camera;
540 if (halVersion == CAMERA_HAL_API_VERSION_NORMAL_CONNECT) {
541 // Default path: hal version is don't care, do normal camera connect.
542 camera = Camera::connect(cameraId, clientName,
543 Camera::USE_CALLING_UID, Camera::USE_CALLING_PID);
544 } else {
545 jint status = Camera::connectLegacy(cameraId, halVersion, clientName,
546 Camera::USE_CALLING_UID, camera);
547 if (status != NO_ERROR) {
548 return status;
549 }
550 }
551
552 if (camera == NULL) {
553 return -EACCES;
554 }
555
556 // make sure camera hardware is alive
557 if (camera->getStatus() != NO_ERROR) {
558 return NO_INIT;
559 }
560
561 jclass clazz = env->GetObjectClass(thiz);
562 if (clazz == NULL) {
563 // This should never happen
564 jniThrowRuntimeException(env, "Can't find android/hardware/Camera");
565 return INVALID_OPERATION;
566 }
567
568 // We use a weak reference so the Camera object can be garbage collected.
569 // The reference is only used as a proxy for callbacks.
570 sp<JNICameraContext> context = new JNICameraContext(env, weak_this, clazz, camera);
571 context->incStrong((void*)android_hardware_Camera_native_setup);
572 camera->setListener(context);
573
574 // save context in opaque field
575 env->SetLongField(thiz, fields.context, (jlong)context.get());
576
577 // Update default display orientation in case the sensor is reverse-landscape
578 CameraInfo cameraInfo;
579 status_t rc = Camera::getCameraInfo(cameraId, &cameraInfo);
580 if (rc != NO_ERROR) {
581 return rc;
582 }
583 int defaultOrientation = 0;
584 switch (cameraInfo.orientation) {
585 case 0:
586 break;
587 case 90:
588 if (cameraInfo.facing == CAMERA_FACING_FRONT) {
589 defaultOrientation = 180;
590 }
591 break;
592 case 180:
593 defaultOrientation = 180;
594 break;
595 case 270:
596 if (cameraInfo.facing != CAMERA_FACING_FRONT) {
597 defaultOrientation = 180;
598 }
599 break;
600 default:
601 ALOGE("Unexpected camera orientation %d!", cameraInfo.orientation);
602 break;
603 }
604 if (defaultOrientation != 0) {
605 ALOGV("Setting default display orientation to %d", defaultOrientation);
606 rc = camera->sendCommand(CAMERA_CMD_SET_DISPLAY_ORIENTATION,
607 defaultOrientation, 0);
608 if (rc != NO_ERROR) {
609 ALOGE("Unable to update default orientation: %s (%d)",
610 strerror(-rc), rc);
611 return rc;
612 }
613 }
614
615 return NO_ERROR;
616 }
617
618 // disconnect from camera service
619 // It's okay to call this when the native camera context is already null.
620 // This handles the case where the user has called release() and the
621 // finalizer is invoked later.
android_hardware_Camera_release(JNIEnv * env,jobject thiz)622 static void android_hardware_Camera_release(JNIEnv *env, jobject thiz)
623 {
624 ALOGV("release camera");
625 JNICameraContext* context = NULL;
626 sp<Camera> camera;
627 {
628 Mutex::Autolock _l(sLock);
629 context = reinterpret_cast<JNICameraContext*>(env->GetLongField(thiz, fields.context));
630
631 // Make sure we do not attempt to callback on a deleted Java object.
632 env->SetLongField(thiz, fields.context, 0);
633 }
634
635 // clean up if release has not been called before
636 if (context != NULL) {
637 camera = context->getCamera();
638 context->release();
639 ALOGV("native_release: context=%p camera=%p", context, camera.get());
640
641 // clear callbacks
642 if (camera != NULL) {
643 camera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_NOOP);
644 camera->disconnect();
645 }
646
647 // remove context to prevent further Java access
648 context->decStrong((void*)android_hardware_Camera_native_setup);
649 }
650 }
651
android_hardware_Camera_setPreviewSurface(JNIEnv * env,jobject thiz,jobject jSurface)652 static void android_hardware_Camera_setPreviewSurface(JNIEnv *env, jobject thiz, jobject jSurface)
653 {
654 ALOGV("setPreviewSurface");
655 sp<Camera> camera = get_native_camera(env, thiz, NULL);
656 if (camera == 0) return;
657
658 sp<IGraphicBufferProducer> gbp;
659 sp<Surface> surface;
660 if (jSurface) {
661 surface = android_view_Surface_getSurface(env, jSurface);
662 if (surface != NULL) {
663 gbp = surface->getIGraphicBufferProducer();
664 }
665 }
666
667 if (camera->setPreviewTarget(gbp) != NO_ERROR) {
668 jniThrowException(env, "java/io/IOException", "setPreviewTexture failed");
669 }
670 }
671
android_hardware_Camera_setPreviewTexture(JNIEnv * env,jobject thiz,jobject jSurfaceTexture)672 static void android_hardware_Camera_setPreviewTexture(JNIEnv *env,
673 jobject thiz, jobject jSurfaceTexture)
674 {
675 ALOGV("setPreviewTexture");
676 sp<Camera> camera = get_native_camera(env, thiz, NULL);
677 if (camera == 0) return;
678
679 sp<IGraphicBufferProducer> producer = NULL;
680 if (jSurfaceTexture != NULL) {
681 producer = SurfaceTexture_getProducer(env, jSurfaceTexture);
682 if (producer == NULL) {
683 jniThrowException(env, "java/lang/IllegalArgumentException",
684 "SurfaceTexture already released in setPreviewTexture");
685 return;
686 }
687
688 }
689
690 if (camera->setPreviewTarget(producer) != NO_ERROR) {
691 jniThrowException(env, "java/io/IOException",
692 "setPreviewTexture failed");
693 }
694 }
695
android_hardware_Camera_setPreviewCallbackSurface(JNIEnv * env,jobject thiz,jobject jSurface)696 static void android_hardware_Camera_setPreviewCallbackSurface(JNIEnv *env,
697 jobject thiz, jobject jSurface)
698 {
699 ALOGV("setPreviewCallbackSurface");
700 JNICameraContext* context;
701 sp<Camera> camera = get_native_camera(env, thiz, &context);
702 if (camera == 0) return;
703
704 sp<IGraphicBufferProducer> gbp;
705 sp<Surface> surface;
706 if (jSurface) {
707 surface = android_view_Surface_getSurface(env, jSurface);
708 if (surface != NULL) {
709 gbp = surface->getIGraphicBufferProducer();
710 }
711 }
712 // Clear out normal preview callbacks
713 context->setCallbackMode(env, false, false);
714 // Then set up callback surface
715 if (camera->setPreviewCallbackTarget(gbp) != NO_ERROR) {
716 jniThrowException(env, "java/io/IOException", "setPreviewCallbackTarget failed");
717 }
718 }
719
android_hardware_Camera_startPreview(JNIEnv * env,jobject thiz)720 static void android_hardware_Camera_startPreview(JNIEnv *env, jobject thiz)
721 {
722 ALOGV("startPreview");
723 sp<Camera> camera = get_native_camera(env, thiz, NULL);
724 if (camera == 0) return;
725
726 if (camera->startPreview() != NO_ERROR) {
727 jniThrowRuntimeException(env, "startPreview failed");
728 return;
729 }
730 }
731
android_hardware_Camera_stopPreview(JNIEnv * env,jobject thiz)732 static void android_hardware_Camera_stopPreview(JNIEnv *env, jobject thiz)
733 {
734 ALOGV("stopPreview");
735 sp<Camera> c = get_native_camera(env, thiz, NULL);
736 if (c == 0) return;
737
738 c->stopPreview();
739 }
740
android_hardware_Camera_previewEnabled(JNIEnv * env,jobject thiz)741 static jboolean android_hardware_Camera_previewEnabled(JNIEnv *env, jobject thiz)
742 {
743 ALOGV("previewEnabled");
744 sp<Camera> c = get_native_camera(env, thiz, NULL);
745 if (c == 0) return JNI_FALSE;
746
747 return c->previewEnabled() ? JNI_TRUE : JNI_FALSE;
748 }
749
android_hardware_Camera_setHasPreviewCallback(JNIEnv * env,jobject thiz,jboolean installed,jboolean manualBuffer)750 static void android_hardware_Camera_setHasPreviewCallback(JNIEnv *env, jobject thiz, jboolean installed, jboolean manualBuffer)
751 {
752 ALOGV("setHasPreviewCallback: installed:%d, manualBuffer:%d", (int)installed, (int)manualBuffer);
753 // Important: Only install preview_callback if the Java code has called
754 // setPreviewCallback() with a non-null value, otherwise we'd pay to memcpy
755 // each preview frame for nothing.
756 JNICameraContext* context;
757 sp<Camera> camera = get_native_camera(env, thiz, &context);
758 if (camera == 0) return;
759
760 // setCallbackMode will take care of setting the context flags and calling
761 // camera->setPreviewCallbackFlags within a mutex for us.
762 context->setCallbackMode(env, installed, manualBuffer);
763 }
764
android_hardware_Camera_addCallbackBuffer(JNIEnv * env,jobject thiz,jbyteArray bytes,jint msgType)765 static void android_hardware_Camera_addCallbackBuffer(JNIEnv *env, jobject thiz, jbyteArray bytes, jint msgType) {
766 ALOGV("addCallbackBuffer: 0x%x", msgType);
767
768 JNICameraContext* context = reinterpret_cast<JNICameraContext*>(env->GetLongField(thiz, fields.context));
769
770 if (context != NULL) {
771 context->addCallbackBuffer(env, bytes, msgType);
772 }
773 }
774
android_hardware_Camera_autoFocus(JNIEnv * env,jobject thiz)775 static void android_hardware_Camera_autoFocus(JNIEnv *env, jobject thiz)
776 {
777 ALOGV("autoFocus");
778 JNICameraContext* context;
779 sp<Camera> c = get_native_camera(env, thiz, &context);
780 if (c == 0) return;
781
782 if (c->autoFocus() != NO_ERROR) {
783 jniThrowRuntimeException(env, "autoFocus failed");
784 }
785 }
786
android_hardware_Camera_cancelAutoFocus(JNIEnv * env,jobject thiz)787 static void android_hardware_Camera_cancelAutoFocus(JNIEnv *env, jobject thiz)
788 {
789 ALOGV("cancelAutoFocus");
790 JNICameraContext* context;
791 sp<Camera> c = get_native_camera(env, thiz, &context);
792 if (c == 0) return;
793
794 if (c->cancelAutoFocus() != NO_ERROR) {
795 jniThrowRuntimeException(env, "cancelAutoFocus failed");
796 }
797 }
798
android_hardware_Camera_takePicture(JNIEnv * env,jobject thiz,jint msgType)799 static void android_hardware_Camera_takePicture(JNIEnv *env, jobject thiz, jint msgType)
800 {
801 ALOGV("takePicture");
802 JNICameraContext* context;
803 sp<Camera> camera = get_native_camera(env, thiz, &context);
804 if (camera == 0) return;
805
806 /*
807 * When CAMERA_MSG_RAW_IMAGE is requested, if the raw image callback
808 * buffer is available, CAMERA_MSG_RAW_IMAGE is enabled to get the
809 * notification _and_ the data; otherwise, CAMERA_MSG_RAW_IMAGE_NOTIFY
810 * is enabled to receive the callback notification but no data.
811 *
812 * Note that CAMERA_MSG_RAW_IMAGE_NOTIFY is not exposed to the
813 * Java application.
814 */
815 if (msgType & CAMERA_MSG_RAW_IMAGE) {
816 ALOGV("Enable raw image callback buffer");
817 if (!context->isRawImageCallbackBufferAvailable()) {
818 ALOGV("Enable raw image notification, since no callback buffer exists");
819 msgType &= ~CAMERA_MSG_RAW_IMAGE;
820 msgType |= CAMERA_MSG_RAW_IMAGE_NOTIFY;
821 }
822 }
823
824 if (camera->takePicture(msgType) != NO_ERROR) {
825 jniThrowRuntimeException(env, "takePicture failed");
826 return;
827 }
828 }
829
android_hardware_Camera_setParameters(JNIEnv * env,jobject thiz,jstring params)830 static void android_hardware_Camera_setParameters(JNIEnv *env, jobject thiz, jstring params)
831 {
832 ALOGV("setParameters");
833 sp<Camera> camera = get_native_camera(env, thiz, NULL);
834 if (camera == 0) return;
835
836 const jchar* str = env->GetStringCritical(params, 0);
837 String8 params8;
838 if (params) {
839 params8 = String8(reinterpret_cast<const char16_t*>(str),
840 env->GetStringLength(params));
841 env->ReleaseStringCritical(params, str);
842 }
843 if (camera->setParameters(params8) != NO_ERROR) {
844 jniThrowRuntimeException(env, "setParameters failed");
845 return;
846 }
847 }
848
android_hardware_Camera_getParameters(JNIEnv * env,jobject thiz)849 static jstring android_hardware_Camera_getParameters(JNIEnv *env, jobject thiz)
850 {
851 ALOGV("getParameters");
852 sp<Camera> camera = get_native_camera(env, thiz, NULL);
853 if (camera == 0) return 0;
854
855 String8 params8 = camera->getParameters();
856 if (params8.isEmpty()) {
857 jniThrowRuntimeException(env, "getParameters failed (empty parameters)");
858 return 0;
859 }
860 return env->NewStringUTF(params8.string());
861 }
862
android_hardware_Camera_reconnect(JNIEnv * env,jobject thiz)863 static void android_hardware_Camera_reconnect(JNIEnv *env, jobject thiz)
864 {
865 ALOGV("reconnect");
866 sp<Camera> camera = get_native_camera(env, thiz, NULL);
867 if (camera == 0) return;
868
869 if (camera->reconnect() != NO_ERROR) {
870 jniThrowException(env, "java/io/IOException", "reconnect failed");
871 return;
872 }
873 }
874
android_hardware_Camera_lock(JNIEnv * env,jobject thiz)875 static void android_hardware_Camera_lock(JNIEnv *env, jobject thiz)
876 {
877 ALOGV("lock");
878 sp<Camera> camera = get_native_camera(env, thiz, NULL);
879 if (camera == 0) return;
880
881 if (camera->lock() != NO_ERROR) {
882 jniThrowRuntimeException(env, "lock failed");
883 }
884 }
885
android_hardware_Camera_unlock(JNIEnv * env,jobject thiz)886 static void android_hardware_Camera_unlock(JNIEnv *env, jobject thiz)
887 {
888 ALOGV("unlock");
889 sp<Camera> camera = get_native_camera(env, thiz, NULL);
890 if (camera == 0) return;
891
892 if (camera->unlock() != NO_ERROR) {
893 jniThrowRuntimeException(env, "unlock failed");
894 }
895 }
896
android_hardware_Camera_startSmoothZoom(JNIEnv * env,jobject thiz,jint value)897 static void android_hardware_Camera_startSmoothZoom(JNIEnv *env, jobject thiz, jint value)
898 {
899 ALOGV("startSmoothZoom");
900 sp<Camera> camera = get_native_camera(env, thiz, NULL);
901 if (camera == 0) return;
902
903 status_t rc = camera->sendCommand(CAMERA_CMD_START_SMOOTH_ZOOM, value, 0);
904 if (rc == BAD_VALUE) {
905 char msg[64];
906 sprintf(msg, "invalid zoom value=%d", value);
907 jniThrowException(env, "java/lang/IllegalArgumentException", msg);
908 } else if (rc != NO_ERROR) {
909 jniThrowRuntimeException(env, "start smooth zoom failed");
910 }
911 }
912
android_hardware_Camera_stopSmoothZoom(JNIEnv * env,jobject thiz)913 static void android_hardware_Camera_stopSmoothZoom(JNIEnv *env, jobject thiz)
914 {
915 ALOGV("stopSmoothZoom");
916 sp<Camera> camera = get_native_camera(env, thiz, NULL);
917 if (camera == 0) return;
918
919 if (camera->sendCommand(CAMERA_CMD_STOP_SMOOTH_ZOOM, 0, 0) != NO_ERROR) {
920 jniThrowRuntimeException(env, "stop smooth zoom failed");
921 }
922 }
923
android_hardware_Camera_setDisplayOrientation(JNIEnv * env,jobject thiz,jint value)924 static void android_hardware_Camera_setDisplayOrientation(JNIEnv *env, jobject thiz,
925 jint value)
926 {
927 ALOGV("setDisplayOrientation");
928 sp<Camera> camera = get_native_camera(env, thiz, NULL);
929 if (camera == 0) return;
930
931 if (camera->sendCommand(CAMERA_CMD_SET_DISPLAY_ORIENTATION, value, 0) != NO_ERROR) {
932 jniThrowRuntimeException(env, "set display orientation failed");
933 }
934 }
935
android_hardware_Camera_enableShutterSound(JNIEnv * env,jobject thiz,jboolean enabled)936 static jboolean android_hardware_Camera_enableShutterSound(JNIEnv *env, jobject thiz,
937 jboolean enabled)
938 {
939 ALOGV("enableShutterSound");
940 sp<Camera> camera = get_native_camera(env, thiz, NULL);
941 if (camera == 0) return JNI_FALSE;
942
943 int32_t value = (enabled == JNI_TRUE) ? 1 : 0;
944 status_t rc = camera->sendCommand(CAMERA_CMD_ENABLE_SHUTTER_SOUND, value, 0);
945 if (rc == NO_ERROR) {
946 return JNI_TRUE;
947 } else if (rc == PERMISSION_DENIED) {
948 return JNI_FALSE;
949 } else {
950 jniThrowRuntimeException(env, "enable shutter sound failed");
951 return JNI_FALSE;
952 }
953 }
954
android_hardware_Camera_startFaceDetection(JNIEnv * env,jobject thiz,jint type)955 static void android_hardware_Camera_startFaceDetection(JNIEnv *env, jobject thiz,
956 jint type)
957 {
958 ALOGV("startFaceDetection");
959 JNICameraContext* context;
960 sp<Camera> camera = get_native_camera(env, thiz, &context);
961 if (camera == 0) return;
962
963 status_t rc = camera->sendCommand(CAMERA_CMD_START_FACE_DETECTION, type, 0);
964 if (rc == BAD_VALUE) {
965 char msg[64];
966 snprintf(msg, sizeof(msg), "invalid face detection type=%d", type);
967 jniThrowException(env, "java/lang/IllegalArgumentException", msg);
968 } else if (rc != NO_ERROR) {
969 jniThrowRuntimeException(env, "start face detection failed");
970 }
971 }
972
android_hardware_Camera_stopFaceDetection(JNIEnv * env,jobject thiz)973 static void android_hardware_Camera_stopFaceDetection(JNIEnv *env, jobject thiz)
974 {
975 ALOGV("stopFaceDetection");
976 sp<Camera> camera = get_native_camera(env, thiz, NULL);
977 if (camera == 0) return;
978
979 if (camera->sendCommand(CAMERA_CMD_STOP_FACE_DETECTION, 0, 0) != NO_ERROR) {
980 jniThrowRuntimeException(env, "stop face detection failed");
981 }
982 }
983
android_hardware_Camera_enableFocusMoveCallback(JNIEnv * env,jobject thiz,jint enable)984 static void android_hardware_Camera_enableFocusMoveCallback(JNIEnv *env, jobject thiz, jint enable)
985 {
986 ALOGV("enableFocusMoveCallback");
987 sp<Camera> camera = get_native_camera(env, thiz, NULL);
988 if (camera == 0) return;
989
990 if (camera->sendCommand(CAMERA_CMD_ENABLE_FOCUS_MOVE_MSG, enable, 0) != NO_ERROR) {
991 jniThrowRuntimeException(env, "enable focus move callback failed");
992 }
993 }
994
995 //-------------------------------------------------
996
997 static const JNINativeMethod camMethods[] = {
998 { "getNumberOfCameras",
999 "()I",
1000 (void *)android_hardware_Camera_getNumberOfCameras },
1001 { "_getCameraInfo",
1002 "(ILandroid/hardware/Camera$CameraInfo;)V",
1003 (void*)android_hardware_Camera_getCameraInfo },
1004 { "native_setup",
1005 "(Ljava/lang/Object;IILjava/lang/String;)I",
1006 (void*)android_hardware_Camera_native_setup },
1007 { "native_release",
1008 "()V",
1009 (void*)android_hardware_Camera_release },
1010 { "setPreviewSurface",
1011 "(Landroid/view/Surface;)V",
1012 (void *)android_hardware_Camera_setPreviewSurface },
1013 { "setPreviewTexture",
1014 "(Landroid/graphics/SurfaceTexture;)V",
1015 (void *)android_hardware_Camera_setPreviewTexture },
1016 { "setPreviewCallbackSurface",
1017 "(Landroid/view/Surface;)V",
1018 (void *)android_hardware_Camera_setPreviewCallbackSurface },
1019 { "startPreview",
1020 "()V",
1021 (void *)android_hardware_Camera_startPreview },
1022 { "_stopPreview",
1023 "()V",
1024 (void *)android_hardware_Camera_stopPreview },
1025 { "previewEnabled",
1026 "()Z",
1027 (void *)android_hardware_Camera_previewEnabled },
1028 { "setHasPreviewCallback",
1029 "(ZZ)V",
1030 (void *)android_hardware_Camera_setHasPreviewCallback },
1031 { "_addCallbackBuffer",
1032 "([BI)V",
1033 (void *)android_hardware_Camera_addCallbackBuffer },
1034 { "native_autoFocus",
1035 "()V",
1036 (void *)android_hardware_Camera_autoFocus },
1037 { "native_cancelAutoFocus",
1038 "()V",
1039 (void *)android_hardware_Camera_cancelAutoFocus },
1040 { "native_takePicture",
1041 "(I)V",
1042 (void *)android_hardware_Camera_takePicture },
1043 { "native_setParameters",
1044 "(Ljava/lang/String;)V",
1045 (void *)android_hardware_Camera_setParameters },
1046 { "native_getParameters",
1047 "()Ljava/lang/String;",
1048 (void *)android_hardware_Camera_getParameters },
1049 { "reconnect",
1050 "()V",
1051 (void*)android_hardware_Camera_reconnect },
1052 { "lock",
1053 "()V",
1054 (void*)android_hardware_Camera_lock },
1055 { "unlock",
1056 "()V",
1057 (void*)android_hardware_Camera_unlock },
1058 { "startSmoothZoom",
1059 "(I)V",
1060 (void *)android_hardware_Camera_startSmoothZoom },
1061 { "stopSmoothZoom",
1062 "()V",
1063 (void *)android_hardware_Camera_stopSmoothZoom },
1064 { "setDisplayOrientation",
1065 "(I)V",
1066 (void *)android_hardware_Camera_setDisplayOrientation },
1067 { "_enableShutterSound",
1068 "(Z)Z",
1069 (void *)android_hardware_Camera_enableShutterSound },
1070 { "_startFaceDetection",
1071 "(I)V",
1072 (void *)android_hardware_Camera_startFaceDetection },
1073 { "_stopFaceDetection",
1074 "()V",
1075 (void *)android_hardware_Camera_stopFaceDetection},
1076 { "enableFocusMoveCallback",
1077 "(I)V",
1078 (void *)android_hardware_Camera_enableFocusMoveCallback},
1079 };
1080
1081 struct field {
1082 const char *class_name;
1083 const char *field_name;
1084 const char *field_type;
1085 jfieldID *jfield;
1086 };
1087
find_fields(JNIEnv * env,field * fields,int count)1088 static void find_fields(JNIEnv *env, field *fields, int count)
1089 {
1090 for (int i = 0; i < count; i++) {
1091 field *f = &fields[i];
1092 jclass clazz = FindClassOrDie(env, f->class_name);
1093 jfieldID field = GetFieldIDOrDie(env, clazz, f->field_name, f->field_type);
1094 *(f->jfield) = field;
1095 }
1096 }
1097
1098 // Get all the required offsets in java class and register native functions
register_android_hardware_Camera(JNIEnv * env)1099 int register_android_hardware_Camera(JNIEnv *env)
1100 {
1101 field fields_to_find[] = {
1102 { "android/hardware/Camera", "mNativeContext", "J", &fields.context },
1103 { "android/hardware/Camera$CameraInfo", "facing", "I", &fields.facing },
1104 { "android/hardware/Camera$CameraInfo", "orientation", "I", &fields.orientation },
1105 { "android/hardware/Camera$CameraInfo", "canDisableShutterSound", "Z",
1106 &fields.canDisableShutterSound },
1107 { "android/hardware/Camera$Face", "rect", "Landroid/graphics/Rect;", &fields.face_rect },
1108 { "android/hardware/Camera$Face", "leftEye", "Landroid/graphics/Point;", &fields.face_left_eye},
1109 { "android/hardware/Camera$Face", "rightEye", "Landroid/graphics/Point;", &fields.face_right_eye},
1110 { "android/hardware/Camera$Face", "mouth", "Landroid/graphics/Point;", &fields.face_mouth},
1111 { "android/hardware/Camera$Face", "score", "I", &fields.face_score },
1112 { "android/hardware/Camera$Face", "id", "I", &fields.face_id},
1113 { "android/graphics/Rect", "left", "I", &fields.rect_left },
1114 { "android/graphics/Rect", "top", "I", &fields.rect_top },
1115 { "android/graphics/Rect", "right", "I", &fields.rect_right },
1116 { "android/graphics/Rect", "bottom", "I", &fields.rect_bottom },
1117 { "android/graphics/Point", "x", "I", &fields.point_x},
1118 { "android/graphics/Point", "y", "I", &fields.point_y},
1119 };
1120
1121 find_fields(env, fields_to_find, NELEM(fields_to_find));
1122
1123 jclass clazz = FindClassOrDie(env, "android/hardware/Camera");
1124 fields.post_event = GetStaticMethodIDOrDie(env, clazz, "postEventFromNative",
1125 "(Ljava/lang/Object;IIILjava/lang/Object;)V");
1126
1127 clazz = FindClassOrDie(env, "android/graphics/Rect");
1128 fields.rect_constructor = GetMethodIDOrDie(env, clazz, "<init>", "()V");
1129
1130 clazz = FindClassOrDie(env, "android/hardware/Camera$Face");
1131 fields.face_constructor = GetMethodIDOrDie(env, clazz, "<init>", "()V");
1132
1133 clazz = env->FindClass("android/graphics/Point");
1134 fields.point_constructor = env->GetMethodID(clazz, "<init>", "()V");
1135 if (fields.point_constructor == NULL) {
1136 ALOGE("Can't find android/graphics/Point()");
1137 return -1;
1138 }
1139
1140 // Register native functions
1141 return RegisterMethodsOrDie(env, "android/hardware/Camera", camMethods, NELEM(camMethods));
1142 }
1143