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
37using namespace android;
38
39enum {
40    // Keep up to date with Camera.java
41    CAMERA_HAL_API_VERSION_NORMAL_CONNECT = -2,
42};
43
44struct 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
67static fields_t fields;
68static Mutex sLock;
69
70// provides persistent context for calls from native code to Java
71class JNICameraContext: public CameraListener
72{
73public:
74    JNICameraContext(JNIEnv* env, jobject weak_this, jclass clazz, const sp<Camera>& camera);
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    virtual void postRecordingFrameHandleTimestampBatch(
82            const std::vector<nsecs_t>& timestamps,
83            const std::vector<native_handle_t*>& handles);
84    void postMetadata(JNIEnv *env, int32_t msgType, camera_frame_metadata_t *metadata);
85    void addCallbackBuffer(JNIEnv *env, jbyteArray cbb, int msgType);
86    void setCallbackMode(JNIEnv *env, bool installed, bool manualMode);
87    sp<Camera> getCamera() { Mutex::Autolock _l(mLock); return mCamera; }
88    bool isRawImageCallbackBufferAvailable() const;
89    void release();
90
91private:
92    void copyAndPost(JNIEnv* env, const sp<IMemory>& dataPtr, int msgType);
93    void clearCallbackBuffers_l(JNIEnv *env, Vector<jbyteArray> *buffers);
94    void clearCallbackBuffers_l(JNIEnv *env);
95    jbyteArray getCallbackBuffer(JNIEnv *env, Vector<jbyteArray> *buffers, size_t bufferSize);
96
97    jobject     mCameraJObjectWeak;     // weak reference to java object
98    jclass      mCameraJClass;          // strong reference to java class
99    sp<Camera>  mCamera;                // strong reference to native object
100    jclass      mFaceClass;  // strong reference to Face class
101    jclass      mRectClass;  // strong reference to Rect class
102    jclass      mPointClass;  // strong reference to Point class
103    Mutex       mLock;
104
105    /*
106     * Global reference application-managed raw image buffer queue.
107     *
108     * Manual-only mode is supported for raw image callbacks, which is
109     * set whenever method addCallbackBuffer() with msgType =
110     * CAMERA_MSG_RAW_IMAGE is called; otherwise, null is returned
111     * with raw image callbacks.
112     */
113    Vector<jbyteArray> mRawImageCallbackBuffers;
114
115    /*
116     * Application-managed preview buffer queue and the flags
117     * associated with the usage of the preview buffer callback.
118     */
119    Vector<jbyteArray> mCallbackBuffers; // Global reference application managed byte[]
120    bool mManualBufferMode;              // Whether to use application managed buffers.
121    bool mManualCameraCallbackSet;       // Whether the callback has been set, used to
122                                         // reduce unnecessary calls to set the callback.
123};
124
125bool JNICameraContext::isRawImageCallbackBufferAvailable() const
126{
127    return !mRawImageCallbackBuffers.isEmpty();
128}
129
130sp<Camera> get_native_camera(JNIEnv *env, jobject thiz, JNICameraContext** pContext)
131{
132    sp<Camera> camera;
133    Mutex::Autolock _l(sLock);
134    JNICameraContext* context = reinterpret_cast<JNICameraContext*>(env->GetLongField(thiz, fields.context));
135    if (context != NULL) {
136        camera = context->getCamera();
137    }
138    ALOGV("get_native_camera: context=%p, camera=%p", context, camera.get());
139    if (camera == 0) {
140        jniThrowRuntimeException(env,
141                "Camera is being used after Camera.release() was called");
142    }
143
144    if (pContext != NULL) *pContext = context;
145    return camera;
146}
147
148JNICameraContext::JNICameraContext(JNIEnv* env, jobject weak_this, jclass clazz, const sp<Camera>& camera)
149{
150    mCameraJObjectWeak = env->NewGlobalRef(weak_this);
151    mCameraJClass = (jclass)env->NewGlobalRef(clazz);
152    mCamera = camera;
153
154    jclass faceClazz = env->FindClass("android/hardware/Camera$Face");
155    mFaceClass = (jclass) env->NewGlobalRef(faceClazz);
156
157    jclass rectClazz = env->FindClass("android/graphics/Rect");
158    mRectClass = (jclass) env->NewGlobalRef(rectClazz);
159
160    jclass pointClazz = env->FindClass("android/graphics/Point");
161    mPointClass = (jclass) env->NewGlobalRef(pointClazz);
162
163    mManualBufferMode = false;
164    mManualCameraCallbackSet = false;
165}
166
167void JNICameraContext::release()
168{
169    ALOGV("release");
170    Mutex::Autolock _l(mLock);
171    JNIEnv *env = AndroidRuntime::getJNIEnv();
172
173    if (mCameraJObjectWeak != NULL) {
174        env->DeleteGlobalRef(mCameraJObjectWeak);
175        mCameraJObjectWeak = NULL;
176    }
177    if (mCameraJClass != NULL) {
178        env->DeleteGlobalRef(mCameraJClass);
179        mCameraJClass = NULL;
180    }
181    if (mFaceClass != NULL) {
182        env->DeleteGlobalRef(mFaceClass);
183        mFaceClass = NULL;
184    }
185    if (mRectClass != NULL) {
186        env->DeleteGlobalRef(mRectClass);
187        mRectClass = NULL;
188    }
189    if (mPointClass != NULL) {
190        env->DeleteGlobalRef(mPointClass);
191        mPointClass = NULL;
192    }
193    clearCallbackBuffers_l(env);
194    mCamera.clear();
195}
196
197void JNICameraContext::notify(int32_t msgType, int32_t ext1, int32_t ext2)
198{
199    ALOGV("notify");
200
201    // VM pointer will be NULL if object is released
202    Mutex::Autolock _l(mLock);
203    if (mCameraJObjectWeak == NULL) {
204        ALOGW("callback on dead camera object");
205        return;
206    }
207    JNIEnv *env = AndroidRuntime::getJNIEnv();
208
209    /*
210     * If the notification or msgType is CAMERA_MSG_RAW_IMAGE_NOTIFY, change it
211     * to CAMERA_MSG_RAW_IMAGE since CAMERA_MSG_RAW_IMAGE_NOTIFY is not exposed
212     * to the Java app.
213     */
214    if (msgType == CAMERA_MSG_RAW_IMAGE_NOTIFY) {
215        msgType = CAMERA_MSG_RAW_IMAGE;
216    }
217
218    env->CallStaticVoidMethod(mCameraJClass, fields.post_event,
219            mCameraJObjectWeak, msgType, ext1, ext2, NULL);
220}
221
222jbyteArray JNICameraContext::getCallbackBuffer(
223        JNIEnv* env, Vector<jbyteArray>* buffers, size_t bufferSize)
224{
225    jbyteArray obj = NULL;
226
227    // Vector access should be protected by lock in postData()
228    if (!buffers->isEmpty()) {
229        ALOGV("Using callback buffer from queue of length %zu", buffers->size());
230        jbyteArray globalBuffer = buffers->itemAt(0);
231        buffers->removeAt(0);
232
233        obj = (jbyteArray)env->NewLocalRef(globalBuffer);
234        env->DeleteGlobalRef(globalBuffer);
235
236        if (obj != NULL) {
237            jsize bufferLength = env->GetArrayLength(obj);
238            if ((int)bufferLength < (int)bufferSize) {
239                ALOGE("Callback buffer was too small! Expected %zu bytes, but got %d bytes!",
240                    bufferSize, bufferLength);
241                env->DeleteLocalRef(obj);
242                return NULL;
243            }
244        }
245    }
246
247    return obj;
248}
249
250void JNICameraContext::copyAndPost(JNIEnv* env, const sp<IMemory>& dataPtr, int msgType)
251{
252    jbyteArray obj = NULL;
253
254    // allocate Java byte array and copy data
255    if (dataPtr != NULL) {
256        ssize_t offset;
257        size_t size;
258        sp<IMemoryHeap> heap = dataPtr->getMemory(&offset, &size);
259        ALOGV("copyAndPost: off=%zd, size=%zu", offset, size);
260        uint8_t *heapBase = (uint8_t*)heap->base();
261
262        if (heapBase != NULL) {
263            const jbyte* data = reinterpret_cast<const jbyte*>(heapBase + offset);
264
265            if (msgType == CAMERA_MSG_RAW_IMAGE) {
266                obj = getCallbackBuffer(env, &mRawImageCallbackBuffers, size);
267            } else if (msgType == CAMERA_MSG_PREVIEW_FRAME && mManualBufferMode) {
268                obj = getCallbackBuffer(env, &mCallbackBuffers, size);
269
270                if (mCallbackBuffers.isEmpty()) {
271                    ALOGV("Out of buffers, clearing callback!");
272                    mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_NOOP);
273                    mManualCameraCallbackSet = false;
274
275                    if (obj == NULL) {
276                        return;
277                    }
278                }
279            } else {
280                ALOGV("Allocating callback buffer");
281                obj = env->NewByteArray(size);
282            }
283
284            if (obj == NULL) {
285                ALOGE("Couldn't allocate byte array for JPEG data");
286                env->ExceptionClear();
287            } else {
288                env->SetByteArrayRegion(obj, 0, size, data);
289            }
290        } else {
291            ALOGE("image heap is NULL");
292        }
293    }
294
295    // post image data to Java
296    env->CallStaticVoidMethod(mCameraJClass, fields.post_event,
297            mCameraJObjectWeak, msgType, 0, 0, obj);
298    if (obj) {
299        env->DeleteLocalRef(obj);
300    }
301}
302
303void JNICameraContext::postData(int32_t msgType, const sp<IMemory>& dataPtr,
304                                camera_frame_metadata_t *metadata)
305{
306    // VM pointer will be NULL if object is released
307    Mutex::Autolock _l(mLock);
308    JNIEnv *env = AndroidRuntime::getJNIEnv();
309    if (mCameraJObjectWeak == NULL) {
310        ALOGW("callback on dead camera object");
311        return;
312    }
313
314    int32_t dataMsgType = msgType & ~CAMERA_MSG_PREVIEW_METADATA;
315
316    // return data based on callback type
317    switch (dataMsgType) {
318        case CAMERA_MSG_VIDEO_FRAME:
319            // should never happen
320            break;
321
322        // For backward-compatibility purpose, if there is no callback
323        // buffer for raw image, the callback returns null.
324        case CAMERA_MSG_RAW_IMAGE:
325            ALOGV("rawCallback");
326            if (mRawImageCallbackBuffers.isEmpty()) {
327                env->CallStaticVoidMethod(mCameraJClass, fields.post_event,
328                        mCameraJObjectWeak, dataMsgType, 0, 0, NULL);
329            } else {
330                copyAndPost(env, dataPtr, dataMsgType);
331            }
332            break;
333
334        // There is no data.
335        case 0:
336            break;
337
338        default:
339            ALOGV("dataCallback(%d, %p)", dataMsgType, dataPtr.get());
340            copyAndPost(env, dataPtr, dataMsgType);
341            break;
342    }
343
344    // post frame metadata to Java
345    if (metadata && (msgType & CAMERA_MSG_PREVIEW_METADATA)) {
346        postMetadata(env, CAMERA_MSG_PREVIEW_METADATA, metadata);
347    }
348}
349
350void JNICameraContext::postDataTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr)
351{
352    // TODO: plumb up to Java. For now, just drop the timestamp
353    postData(msgType, dataPtr, NULL);
354}
355
356void JNICameraContext::postRecordingFrameHandleTimestamp(nsecs_t, native_handle_t* handle) {
357    // Video buffers are not needed at app layer so just return the video buffers here.
358    // This may be called when stagefright just releases camera but there are still outstanding
359    // video buffers.
360    if (mCamera != nullptr) {
361        mCamera->releaseRecordingFrameHandle(handle);
362    } else {
363        native_handle_close(handle);
364        native_handle_delete(handle);
365    }
366}
367
368void JNICameraContext::postRecordingFrameHandleTimestampBatch(
369        const std::vector<nsecs_t>&,
370        const std::vector<native_handle_t*>& handles) {
371    // Video buffers are not needed at app layer so just return the video buffers here.
372    // This may be called when stagefright just releases camera but there are still outstanding
373    // video buffers.
374    if (mCamera != nullptr) {
375        mCamera->releaseRecordingFrameHandleBatch(handles);
376    } else {
377        for (auto& handle : handles) {
378            native_handle_close(handle);
379            native_handle_delete(handle);
380        }
381    }
382}
383
384void JNICameraContext::postMetadata(JNIEnv *env, int32_t msgType, camera_frame_metadata_t *metadata)
385{
386    jobjectArray obj = NULL;
387    obj = (jobjectArray) env->NewObjectArray(metadata->number_of_faces,
388                                             mFaceClass, NULL);
389    if (obj == NULL) {
390        ALOGE("Couldn't allocate face metadata array");
391        return;
392    }
393
394    for (int i = 0; i < metadata->number_of_faces; i++) {
395        jobject face = env->NewObject(mFaceClass, fields.face_constructor);
396        env->SetObjectArrayElement(obj, i, face);
397
398        jobject rect = env->NewObject(mRectClass, fields.rect_constructor);
399        env->SetIntField(rect, fields.rect_left, metadata->faces[i].rect[0]);
400        env->SetIntField(rect, fields.rect_top, metadata->faces[i].rect[1]);
401        env->SetIntField(rect, fields.rect_right, metadata->faces[i].rect[2]);
402        env->SetIntField(rect, fields.rect_bottom, metadata->faces[i].rect[3]);
403
404        env->SetObjectField(face, fields.face_rect, rect);
405        env->SetIntField(face, fields.face_score, metadata->faces[i].score);
406
407        bool optionalFields = metadata->faces[i].id != 0
408            && metadata->faces[i].left_eye[0] != -2000 && metadata->faces[i].left_eye[1] != -2000
409            && metadata->faces[i].right_eye[0] != -2000 && metadata->faces[i].right_eye[1] != -2000
410            && metadata->faces[i].mouth[0] != -2000 && metadata->faces[i].mouth[1] != -2000;
411        if (optionalFields) {
412            int32_t id = metadata->faces[i].id;
413            env->SetIntField(face, fields.face_id, id);
414
415            jobject leftEye = env->NewObject(mPointClass, fields.point_constructor);
416            env->SetIntField(leftEye, fields.point_x, metadata->faces[i].left_eye[0]);
417            env->SetIntField(leftEye, fields.point_y, metadata->faces[i].left_eye[1]);
418            env->SetObjectField(face, fields.face_left_eye, leftEye);
419            env->DeleteLocalRef(leftEye);
420
421            jobject rightEye = env->NewObject(mPointClass, fields.point_constructor);
422            env->SetIntField(rightEye, fields.point_x, metadata->faces[i].right_eye[0]);
423            env->SetIntField(rightEye, fields.point_y, metadata->faces[i].right_eye[1]);
424            env->SetObjectField(face, fields.face_right_eye, rightEye);
425            env->DeleteLocalRef(rightEye);
426
427            jobject mouth = env->NewObject(mPointClass, fields.point_constructor);
428            env->SetIntField(mouth, fields.point_x, metadata->faces[i].mouth[0]);
429            env->SetIntField(mouth, fields.point_y, metadata->faces[i].mouth[1]);
430            env->SetObjectField(face, fields.face_mouth, mouth);
431            env->DeleteLocalRef(mouth);
432        }
433
434        env->DeleteLocalRef(face);
435        env->DeleteLocalRef(rect);
436    }
437    env->CallStaticVoidMethod(mCameraJClass, fields.post_event,
438            mCameraJObjectWeak, msgType, 0, 0, obj);
439    env->DeleteLocalRef(obj);
440}
441
442void JNICameraContext::setCallbackMode(JNIEnv *env, bool installed, bool manualMode)
443{
444    Mutex::Autolock _l(mLock);
445    mManualBufferMode = manualMode;
446    mManualCameraCallbackSet = false;
447
448    // In order to limit the over usage of binder threads, all non-manual buffer
449    // callbacks use CAMERA_FRAME_CALLBACK_FLAG_BARCODE_SCANNER mode now.
450    //
451    // Continuous callbacks will have the callback re-registered from handleMessage.
452    // Manual buffer mode will operate as fast as possible, relying on the finite supply
453    // of buffers for throttling.
454
455    if (!installed) {
456        mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_NOOP);
457        clearCallbackBuffers_l(env, &mCallbackBuffers);
458    } else if (mManualBufferMode) {
459        if (!mCallbackBuffers.isEmpty()) {
460            mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_CAMERA);
461            mManualCameraCallbackSet = true;
462        }
463    } else {
464        mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_BARCODE_SCANNER);
465        clearCallbackBuffers_l(env, &mCallbackBuffers);
466    }
467}
468
469void JNICameraContext::addCallbackBuffer(
470        JNIEnv *env, jbyteArray cbb, int msgType)
471{
472    ALOGV("addCallbackBuffer: 0x%x", msgType);
473    if (cbb != NULL) {
474        Mutex::Autolock _l(mLock);
475        switch (msgType) {
476            case CAMERA_MSG_PREVIEW_FRAME: {
477                jbyteArray callbackBuffer = (jbyteArray)env->NewGlobalRef(cbb);
478                mCallbackBuffers.push(callbackBuffer);
479
480                ALOGV("Adding callback buffer to queue, %zu total",
481                        mCallbackBuffers.size());
482
483                // We want to make sure the camera knows we're ready for the
484                // next frame. This may have come unset had we not had a
485                // callbackbuffer ready for it last time.
486                if (mManualBufferMode && !mManualCameraCallbackSet) {
487                    mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_CAMERA);
488                    mManualCameraCallbackSet = true;
489                }
490                break;
491            }
492            case CAMERA_MSG_RAW_IMAGE: {
493                jbyteArray callbackBuffer = (jbyteArray)env->NewGlobalRef(cbb);
494                mRawImageCallbackBuffers.push(callbackBuffer);
495                break;
496            }
497            default: {
498                jniThrowException(env,
499                        "java/lang/IllegalArgumentException",
500                        "Unsupported message type");
501                return;
502            }
503        }
504    } else {
505       ALOGE("Null byte array!");
506    }
507}
508
509void JNICameraContext::clearCallbackBuffers_l(JNIEnv *env)
510{
511    clearCallbackBuffers_l(env, &mCallbackBuffers);
512    clearCallbackBuffers_l(env, &mRawImageCallbackBuffers);
513}
514
515void JNICameraContext::clearCallbackBuffers_l(JNIEnv *env, Vector<jbyteArray> *buffers) {
516    ALOGV("Clearing callback buffers, %zu remained", buffers->size());
517    while (!buffers->isEmpty()) {
518        env->DeleteGlobalRef(buffers->top());
519        buffers->pop();
520    }
521}
522
523static jint android_hardware_Camera_getNumberOfCameras(JNIEnv *env, jobject thiz)
524{
525    return Camera::getNumberOfCameras();
526}
527
528static void android_hardware_Camera_getCameraInfo(JNIEnv *env, jobject thiz,
529    jint cameraId, jobject info_obj)
530{
531    CameraInfo cameraInfo;
532    if (cameraId >= Camera::getNumberOfCameras() || cameraId < 0) {
533        ALOGE("%s: Unknown camera ID %d", __FUNCTION__, cameraId);
534        jniThrowRuntimeException(env, "Unknown camera ID");
535        return;
536    }
537
538    status_t rc = Camera::getCameraInfo(cameraId, &cameraInfo);
539    if (rc != NO_ERROR) {
540        jniThrowRuntimeException(env, "Fail to get camera info");
541        return;
542    }
543    env->SetIntField(info_obj, fields.facing, cameraInfo.facing);
544    env->SetIntField(info_obj, fields.orientation, cameraInfo.orientation);
545
546    char value[PROPERTY_VALUE_MAX];
547    property_get("ro.camera.sound.forced", value, "0");
548    jboolean canDisableShutterSound = (strncmp(value, "0", 2) == 0);
549    env->SetBooleanField(info_obj, fields.canDisableShutterSound,
550            canDisableShutterSound);
551}
552
553// connect to camera service
554static jint android_hardware_Camera_native_setup(JNIEnv *env, jobject thiz,
555    jobject weak_this, jint cameraId, jint halVersion, jstring clientPackageName)
556{
557    // Convert jstring to String16
558    const char16_t *rawClientName = reinterpret_cast<const char16_t*>(
559        env->GetStringChars(clientPackageName, NULL));
560    jsize rawClientNameLen = env->GetStringLength(clientPackageName);
561    String16 clientName(rawClientName, rawClientNameLen);
562    env->ReleaseStringChars(clientPackageName,
563                            reinterpret_cast<const jchar*>(rawClientName));
564
565    sp<Camera> camera;
566    if (halVersion == CAMERA_HAL_API_VERSION_NORMAL_CONNECT) {
567        // Default path: hal version is don't care, do normal camera connect.
568        camera = Camera::connect(cameraId, clientName,
569                Camera::USE_CALLING_UID, Camera::USE_CALLING_PID);
570    } else {
571        jint status = Camera::connectLegacy(cameraId, halVersion, clientName,
572                Camera::USE_CALLING_UID, camera);
573        if (status != NO_ERROR) {
574            return status;
575        }
576    }
577
578    if (camera == NULL) {
579        return -EACCES;
580    }
581
582    // make sure camera hardware is alive
583    if (camera->getStatus() != NO_ERROR) {
584        return NO_INIT;
585    }
586
587    jclass clazz = env->GetObjectClass(thiz);
588    if (clazz == NULL) {
589        // This should never happen
590        jniThrowRuntimeException(env, "Can't find android/hardware/Camera");
591        return INVALID_OPERATION;
592    }
593
594    // We use a weak reference so the Camera object can be garbage collected.
595    // The reference is only used as a proxy for callbacks.
596    sp<JNICameraContext> context = new JNICameraContext(env, weak_this, clazz, camera);
597    context->incStrong((void*)android_hardware_Camera_native_setup);
598    camera->setListener(context);
599
600    // save context in opaque field
601    env->SetLongField(thiz, fields.context, (jlong)context.get());
602
603    // Update default display orientation in case the sensor is reverse-landscape
604    CameraInfo cameraInfo;
605    status_t rc = Camera::getCameraInfo(cameraId, &cameraInfo);
606    if (rc != NO_ERROR) {
607        return rc;
608    }
609    int defaultOrientation = 0;
610    switch (cameraInfo.orientation) {
611        case 0:
612            break;
613        case 90:
614            if (cameraInfo.facing == CAMERA_FACING_FRONT) {
615                defaultOrientation = 180;
616            }
617            break;
618        case 180:
619            defaultOrientation = 180;
620            break;
621        case 270:
622            if (cameraInfo.facing != CAMERA_FACING_FRONT) {
623                defaultOrientation = 180;
624            }
625            break;
626        default:
627            ALOGE("Unexpected camera orientation %d!", cameraInfo.orientation);
628            break;
629    }
630    if (defaultOrientation != 0) {
631        ALOGV("Setting default display orientation to %d", defaultOrientation);
632        rc = camera->sendCommand(CAMERA_CMD_SET_DISPLAY_ORIENTATION,
633                defaultOrientation, 0);
634        if (rc != NO_ERROR) {
635            ALOGE("Unable to update default orientation: %s (%d)",
636                    strerror(-rc), rc);
637            return rc;
638        }
639    }
640
641    return NO_ERROR;
642}
643
644// disconnect from camera service
645// It's okay to call this when the native camera context is already null.
646// This handles the case where the user has called release() and the
647// finalizer is invoked later.
648static void android_hardware_Camera_release(JNIEnv *env, jobject thiz)
649{
650    ALOGV("release camera");
651    JNICameraContext* context = NULL;
652    sp<Camera> camera;
653    {
654        Mutex::Autolock _l(sLock);
655        context = reinterpret_cast<JNICameraContext*>(env->GetLongField(thiz, fields.context));
656
657        // Make sure we do not attempt to callback on a deleted Java object.
658        env->SetLongField(thiz, fields.context, 0);
659    }
660
661    // clean up if release has not been called before
662    if (context != NULL) {
663        camera = context->getCamera();
664        context->release();
665        ALOGV("native_release: context=%p camera=%p", context, camera.get());
666
667        // clear callbacks
668        if (camera != NULL) {
669            camera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_NOOP);
670            camera->disconnect();
671        }
672
673        // remove context to prevent further Java access
674        context->decStrong((void*)android_hardware_Camera_native_setup);
675    }
676}
677
678static void android_hardware_Camera_setPreviewSurface(JNIEnv *env, jobject thiz, jobject jSurface)
679{
680    ALOGV("setPreviewSurface");
681    sp<Camera> camera = get_native_camera(env, thiz, NULL);
682    if (camera == 0) return;
683
684    sp<IGraphicBufferProducer> gbp;
685    sp<Surface> surface;
686    if (jSurface) {
687        surface = android_view_Surface_getSurface(env, jSurface);
688        if (surface != NULL) {
689            gbp = surface->getIGraphicBufferProducer();
690        }
691    }
692
693    if (camera->setPreviewTarget(gbp) != NO_ERROR) {
694        jniThrowException(env, "java/io/IOException", "setPreviewTexture failed");
695    }
696}
697
698static void android_hardware_Camera_setPreviewTexture(JNIEnv *env,
699        jobject thiz, jobject jSurfaceTexture)
700{
701    ALOGV("setPreviewTexture");
702    sp<Camera> camera = get_native_camera(env, thiz, NULL);
703    if (camera == 0) return;
704
705    sp<IGraphicBufferProducer> producer = NULL;
706    if (jSurfaceTexture != NULL) {
707        producer = SurfaceTexture_getProducer(env, jSurfaceTexture);
708        if (producer == NULL) {
709            jniThrowException(env, "java/lang/IllegalArgumentException",
710                    "SurfaceTexture already released in setPreviewTexture");
711            return;
712        }
713
714    }
715
716    if (camera->setPreviewTarget(producer) != NO_ERROR) {
717        jniThrowException(env, "java/io/IOException",
718                "setPreviewTexture failed");
719    }
720}
721
722static void android_hardware_Camera_setPreviewCallbackSurface(JNIEnv *env,
723        jobject thiz, jobject jSurface)
724{
725    ALOGV("setPreviewCallbackSurface");
726    JNICameraContext* context;
727    sp<Camera> camera = get_native_camera(env, thiz, &context);
728    if (camera == 0) return;
729
730    sp<IGraphicBufferProducer> gbp;
731    sp<Surface> surface;
732    if (jSurface) {
733        surface = android_view_Surface_getSurface(env, jSurface);
734        if (surface != NULL) {
735            gbp = surface->getIGraphicBufferProducer();
736        }
737    }
738    // Clear out normal preview callbacks
739    context->setCallbackMode(env, false, false);
740    // Then set up callback surface
741    if (camera->setPreviewCallbackTarget(gbp) != NO_ERROR) {
742        jniThrowException(env, "java/io/IOException", "setPreviewCallbackTarget failed");
743    }
744}
745
746static void android_hardware_Camera_startPreview(JNIEnv *env, jobject thiz)
747{
748    ALOGV("startPreview");
749    sp<Camera> camera = get_native_camera(env, thiz, NULL);
750    if (camera == 0) return;
751
752    if (camera->startPreview() != NO_ERROR) {
753        jniThrowRuntimeException(env, "startPreview failed");
754        return;
755    }
756}
757
758static void android_hardware_Camera_stopPreview(JNIEnv *env, jobject thiz)
759{
760    ALOGV("stopPreview");
761    sp<Camera> c = get_native_camera(env, thiz, NULL);
762    if (c == 0) return;
763
764    c->stopPreview();
765}
766
767static jboolean android_hardware_Camera_previewEnabled(JNIEnv *env, jobject thiz)
768{
769    ALOGV("previewEnabled");
770    sp<Camera> c = get_native_camera(env, thiz, NULL);
771    if (c == 0) return JNI_FALSE;
772
773    return c->previewEnabled() ? JNI_TRUE : JNI_FALSE;
774}
775
776static void android_hardware_Camera_setHasPreviewCallback(JNIEnv *env, jobject thiz, jboolean installed, jboolean manualBuffer)
777{
778    ALOGV("setHasPreviewCallback: installed:%d, manualBuffer:%d", (int)installed, (int)manualBuffer);
779    // Important: Only install preview_callback if the Java code has called
780    // setPreviewCallback() with a non-null value, otherwise we'd pay to memcpy
781    // each preview frame for nothing.
782    JNICameraContext* context;
783    sp<Camera> camera = get_native_camera(env, thiz, &context);
784    if (camera == 0) return;
785
786    // setCallbackMode will take care of setting the context flags and calling
787    // camera->setPreviewCallbackFlags within a mutex for us.
788    context->setCallbackMode(env, installed, manualBuffer);
789}
790
791static void android_hardware_Camera_addCallbackBuffer(JNIEnv *env, jobject thiz, jbyteArray bytes, jint msgType) {
792    ALOGV("addCallbackBuffer: 0x%x", msgType);
793
794    JNICameraContext* context = reinterpret_cast<JNICameraContext*>(env->GetLongField(thiz, fields.context));
795
796    if (context != NULL) {
797        context->addCallbackBuffer(env, bytes, msgType);
798    }
799}
800
801static void android_hardware_Camera_autoFocus(JNIEnv *env, jobject thiz)
802{
803    ALOGV("autoFocus");
804    JNICameraContext* context;
805    sp<Camera> c = get_native_camera(env, thiz, &context);
806    if (c == 0) return;
807
808    if (c->autoFocus() != NO_ERROR) {
809        jniThrowRuntimeException(env, "autoFocus failed");
810    }
811}
812
813static void android_hardware_Camera_cancelAutoFocus(JNIEnv *env, jobject thiz)
814{
815    ALOGV("cancelAutoFocus");
816    JNICameraContext* context;
817    sp<Camera> c = get_native_camera(env, thiz, &context);
818    if (c == 0) return;
819
820    if (c->cancelAutoFocus() != NO_ERROR) {
821        jniThrowRuntimeException(env, "cancelAutoFocus failed");
822    }
823}
824
825static void android_hardware_Camera_takePicture(JNIEnv *env, jobject thiz, jint msgType)
826{
827    ALOGV("takePicture");
828    JNICameraContext* context;
829    sp<Camera> camera = get_native_camera(env, thiz, &context);
830    if (camera == 0) return;
831
832    /*
833     * When CAMERA_MSG_RAW_IMAGE is requested, if the raw image callback
834     * buffer is available, CAMERA_MSG_RAW_IMAGE is enabled to get the
835     * notification _and_ the data; otherwise, CAMERA_MSG_RAW_IMAGE_NOTIFY
836     * is enabled to receive the callback notification but no data.
837     *
838     * Note that CAMERA_MSG_RAW_IMAGE_NOTIFY is not exposed to the
839     * Java application.
840     */
841    if (msgType & CAMERA_MSG_RAW_IMAGE) {
842        ALOGV("Enable raw image callback buffer");
843        if (!context->isRawImageCallbackBufferAvailable()) {
844            ALOGV("Enable raw image notification, since no callback buffer exists");
845            msgType &= ~CAMERA_MSG_RAW_IMAGE;
846            msgType |= CAMERA_MSG_RAW_IMAGE_NOTIFY;
847        }
848    }
849
850    if (camera->takePicture(msgType) != NO_ERROR) {
851        jniThrowRuntimeException(env, "takePicture failed");
852        return;
853    }
854}
855
856static void android_hardware_Camera_setParameters(JNIEnv *env, jobject thiz, jstring params)
857{
858    ALOGV("setParameters");
859    sp<Camera> camera = get_native_camera(env, thiz, NULL);
860    if (camera == 0) return;
861
862    const jchar* str = env->GetStringCritical(params, 0);
863    String8 params8;
864    if (params) {
865        params8 = String8(reinterpret_cast<const char16_t*>(str),
866                          env->GetStringLength(params));
867        env->ReleaseStringCritical(params, str);
868    }
869    if (camera->setParameters(params8) != NO_ERROR) {
870        jniThrowRuntimeException(env, "setParameters failed");
871        return;
872    }
873}
874
875static jstring android_hardware_Camera_getParameters(JNIEnv *env, jobject thiz)
876{
877    ALOGV("getParameters");
878    sp<Camera> camera = get_native_camera(env, thiz, NULL);
879    if (camera == 0) return 0;
880
881    String8 params8 = camera->getParameters();
882    if (params8.isEmpty()) {
883        jniThrowRuntimeException(env, "getParameters failed (empty parameters)");
884        return 0;
885    }
886    return env->NewStringUTF(params8.string());
887}
888
889static void android_hardware_Camera_reconnect(JNIEnv *env, jobject thiz)
890{
891    ALOGV("reconnect");
892    sp<Camera> camera = get_native_camera(env, thiz, NULL);
893    if (camera == 0) return;
894
895    if (camera->reconnect() != NO_ERROR) {
896        jniThrowException(env, "java/io/IOException", "reconnect failed");
897        return;
898    }
899}
900
901static void android_hardware_Camera_lock(JNIEnv *env, jobject thiz)
902{
903    ALOGV("lock");
904    sp<Camera> camera = get_native_camera(env, thiz, NULL);
905    if (camera == 0) return;
906
907    if (camera->lock() != NO_ERROR) {
908        jniThrowRuntimeException(env, "lock failed");
909    }
910}
911
912static void android_hardware_Camera_unlock(JNIEnv *env, jobject thiz)
913{
914    ALOGV("unlock");
915    sp<Camera> camera = get_native_camera(env, thiz, NULL);
916    if (camera == 0) return;
917
918    if (camera->unlock() != NO_ERROR) {
919        jniThrowRuntimeException(env, "unlock failed");
920    }
921}
922
923static void android_hardware_Camera_startSmoothZoom(JNIEnv *env, jobject thiz, jint value)
924{
925    ALOGV("startSmoothZoom");
926    sp<Camera> camera = get_native_camera(env, thiz, NULL);
927    if (camera == 0) return;
928
929    status_t rc = camera->sendCommand(CAMERA_CMD_START_SMOOTH_ZOOM, value, 0);
930    if (rc == BAD_VALUE) {
931        char msg[64];
932        sprintf(msg, "invalid zoom value=%d", value);
933        jniThrowException(env, "java/lang/IllegalArgumentException", msg);
934    } else if (rc != NO_ERROR) {
935        jniThrowRuntimeException(env, "start smooth zoom failed");
936    }
937}
938
939static void android_hardware_Camera_stopSmoothZoom(JNIEnv *env, jobject thiz)
940{
941    ALOGV("stopSmoothZoom");
942    sp<Camera> camera = get_native_camera(env, thiz, NULL);
943    if (camera == 0) return;
944
945    if (camera->sendCommand(CAMERA_CMD_STOP_SMOOTH_ZOOM, 0, 0) != NO_ERROR) {
946        jniThrowRuntimeException(env, "stop smooth zoom failed");
947    }
948}
949
950static void android_hardware_Camera_setDisplayOrientation(JNIEnv *env, jobject thiz,
951        jint value)
952{
953    ALOGV("setDisplayOrientation");
954    sp<Camera> camera = get_native_camera(env, thiz, NULL);
955    if (camera == 0) return;
956
957    if (camera->sendCommand(CAMERA_CMD_SET_DISPLAY_ORIENTATION, value, 0) != NO_ERROR) {
958        jniThrowRuntimeException(env, "set display orientation failed");
959    }
960}
961
962static jboolean android_hardware_Camera_enableShutterSound(JNIEnv *env, jobject thiz,
963        jboolean enabled)
964{
965    ALOGV("enableShutterSound");
966    sp<Camera> camera = get_native_camera(env, thiz, NULL);
967    if (camera == 0) return JNI_FALSE;
968
969    int32_t value = (enabled == JNI_TRUE) ? 1 : 0;
970    status_t rc = camera->sendCommand(CAMERA_CMD_ENABLE_SHUTTER_SOUND, value, 0);
971    if (rc == NO_ERROR) {
972        return JNI_TRUE;
973    } else if (rc == PERMISSION_DENIED) {
974        return JNI_FALSE;
975    } else {
976        jniThrowRuntimeException(env, "enable shutter sound failed");
977        return JNI_FALSE;
978    }
979}
980
981static void android_hardware_Camera_startFaceDetection(JNIEnv *env, jobject thiz,
982        jint type)
983{
984    ALOGV("startFaceDetection");
985    JNICameraContext* context;
986    sp<Camera> camera = get_native_camera(env, thiz, &context);
987    if (camera == 0) return;
988
989    status_t rc = camera->sendCommand(CAMERA_CMD_START_FACE_DETECTION, type, 0);
990    if (rc == BAD_VALUE) {
991        char msg[64];
992        snprintf(msg, sizeof(msg), "invalid face detection type=%d", type);
993        jniThrowException(env, "java/lang/IllegalArgumentException", msg);
994    } else if (rc != NO_ERROR) {
995        jniThrowRuntimeException(env, "start face detection failed");
996    }
997}
998
999static void android_hardware_Camera_stopFaceDetection(JNIEnv *env, jobject thiz)
1000{
1001    ALOGV("stopFaceDetection");
1002    sp<Camera> camera = get_native_camera(env, thiz, NULL);
1003    if (camera == 0) return;
1004
1005    if (camera->sendCommand(CAMERA_CMD_STOP_FACE_DETECTION, 0, 0) != NO_ERROR) {
1006        jniThrowRuntimeException(env, "stop face detection failed");
1007    }
1008}
1009
1010static void android_hardware_Camera_enableFocusMoveCallback(JNIEnv *env, jobject thiz, jint enable)
1011{
1012    ALOGV("enableFocusMoveCallback");
1013    sp<Camera> camera = get_native_camera(env, thiz, NULL);
1014    if (camera == 0) return;
1015
1016    if (camera->sendCommand(CAMERA_CMD_ENABLE_FOCUS_MOVE_MSG, enable, 0) != NO_ERROR) {
1017        jniThrowRuntimeException(env, "enable focus move callback failed");
1018    }
1019}
1020
1021//-------------------------------------------------
1022
1023static const JNINativeMethod camMethods[] = {
1024  { "getNumberOfCameras",
1025    "()I",
1026    (void *)android_hardware_Camera_getNumberOfCameras },
1027  { "_getCameraInfo",
1028    "(ILandroid/hardware/Camera$CameraInfo;)V",
1029    (void*)android_hardware_Camera_getCameraInfo },
1030  { "native_setup",
1031    "(Ljava/lang/Object;IILjava/lang/String;)I",
1032    (void*)android_hardware_Camera_native_setup },
1033  { "native_release",
1034    "()V",
1035    (void*)android_hardware_Camera_release },
1036  { "setPreviewSurface",
1037    "(Landroid/view/Surface;)V",
1038    (void *)android_hardware_Camera_setPreviewSurface },
1039  { "setPreviewTexture",
1040    "(Landroid/graphics/SurfaceTexture;)V",
1041    (void *)android_hardware_Camera_setPreviewTexture },
1042  { "setPreviewCallbackSurface",
1043    "(Landroid/view/Surface;)V",
1044    (void *)android_hardware_Camera_setPreviewCallbackSurface },
1045  { "startPreview",
1046    "()V",
1047    (void *)android_hardware_Camera_startPreview },
1048  { "_stopPreview",
1049    "()V",
1050    (void *)android_hardware_Camera_stopPreview },
1051  { "previewEnabled",
1052    "()Z",
1053    (void *)android_hardware_Camera_previewEnabled },
1054  { "setHasPreviewCallback",
1055    "(ZZ)V",
1056    (void *)android_hardware_Camera_setHasPreviewCallback },
1057  { "_addCallbackBuffer",
1058    "([BI)V",
1059    (void *)android_hardware_Camera_addCallbackBuffer },
1060  { "native_autoFocus",
1061    "()V",
1062    (void *)android_hardware_Camera_autoFocus },
1063  { "native_cancelAutoFocus",
1064    "()V",
1065    (void *)android_hardware_Camera_cancelAutoFocus },
1066  { "native_takePicture",
1067    "(I)V",
1068    (void *)android_hardware_Camera_takePicture },
1069  { "native_setParameters",
1070    "(Ljava/lang/String;)V",
1071    (void *)android_hardware_Camera_setParameters },
1072  { "native_getParameters",
1073    "()Ljava/lang/String;",
1074    (void *)android_hardware_Camera_getParameters },
1075  { "reconnect",
1076    "()V",
1077    (void*)android_hardware_Camera_reconnect },
1078  { "lock",
1079    "()V",
1080    (void*)android_hardware_Camera_lock },
1081  { "unlock",
1082    "()V",
1083    (void*)android_hardware_Camera_unlock },
1084  { "startSmoothZoom",
1085    "(I)V",
1086    (void *)android_hardware_Camera_startSmoothZoom },
1087  { "stopSmoothZoom",
1088    "()V",
1089    (void *)android_hardware_Camera_stopSmoothZoom },
1090  { "setDisplayOrientation",
1091    "(I)V",
1092    (void *)android_hardware_Camera_setDisplayOrientation },
1093  { "_enableShutterSound",
1094    "(Z)Z",
1095    (void *)android_hardware_Camera_enableShutterSound },
1096  { "_startFaceDetection",
1097    "(I)V",
1098    (void *)android_hardware_Camera_startFaceDetection },
1099  { "_stopFaceDetection",
1100    "()V",
1101    (void *)android_hardware_Camera_stopFaceDetection},
1102  { "enableFocusMoveCallback",
1103    "(I)V",
1104    (void *)android_hardware_Camera_enableFocusMoveCallback},
1105};
1106
1107struct field {
1108    const char *class_name;
1109    const char *field_name;
1110    const char *field_type;
1111    jfieldID   *jfield;
1112};
1113
1114static void find_fields(JNIEnv *env, field *fields, int count)
1115{
1116    for (int i = 0; i < count; i++) {
1117        field *f = &fields[i];
1118        jclass clazz = FindClassOrDie(env, f->class_name);
1119        jfieldID field = GetFieldIDOrDie(env, clazz, f->field_name, f->field_type);
1120        *(f->jfield) = field;
1121    }
1122}
1123
1124// Get all the required offsets in java class and register native functions
1125int register_android_hardware_Camera(JNIEnv *env)
1126{
1127    field fields_to_find[] = {
1128        { "android/hardware/Camera", "mNativeContext",   "J", &fields.context },
1129        { "android/hardware/Camera$CameraInfo", "facing",   "I", &fields.facing },
1130        { "android/hardware/Camera$CameraInfo", "orientation",   "I", &fields.orientation },
1131        { "android/hardware/Camera$CameraInfo", "canDisableShutterSound",   "Z",
1132          &fields.canDisableShutterSound },
1133        { "android/hardware/Camera$Face", "rect", "Landroid/graphics/Rect;", &fields.face_rect },
1134        { "android/hardware/Camera$Face", "leftEye", "Landroid/graphics/Point;", &fields.face_left_eye},
1135        { "android/hardware/Camera$Face", "rightEye", "Landroid/graphics/Point;", &fields.face_right_eye},
1136        { "android/hardware/Camera$Face", "mouth", "Landroid/graphics/Point;", &fields.face_mouth},
1137        { "android/hardware/Camera$Face", "score", "I", &fields.face_score },
1138        { "android/hardware/Camera$Face", "id", "I", &fields.face_id},
1139        { "android/graphics/Rect", "left", "I", &fields.rect_left },
1140        { "android/graphics/Rect", "top", "I", &fields.rect_top },
1141        { "android/graphics/Rect", "right", "I", &fields.rect_right },
1142        { "android/graphics/Rect", "bottom", "I", &fields.rect_bottom },
1143        { "android/graphics/Point", "x", "I", &fields.point_x},
1144        { "android/graphics/Point", "y", "I", &fields.point_y},
1145    };
1146
1147    find_fields(env, fields_to_find, NELEM(fields_to_find));
1148
1149    jclass clazz = FindClassOrDie(env, "android/hardware/Camera");
1150    fields.post_event = GetStaticMethodIDOrDie(env, clazz, "postEventFromNative",
1151                                               "(Ljava/lang/Object;IIILjava/lang/Object;)V");
1152
1153    clazz = FindClassOrDie(env, "android/graphics/Rect");
1154    fields.rect_constructor = GetMethodIDOrDie(env, clazz, "<init>", "()V");
1155
1156    clazz = FindClassOrDie(env, "android/hardware/Camera$Face");
1157    fields.face_constructor = GetMethodIDOrDie(env, clazz, "<init>", "()V");
1158
1159    clazz = env->FindClass("android/graphics/Point");
1160    fields.point_constructor = env->GetMethodID(clazz, "<init>", "()V");
1161    if (fields.point_constructor == NULL) {
1162        ALOGE("Can't find android/graphics/Point()");
1163        return -1;
1164    }
1165
1166    // Register native functions
1167    return RegisterMethodsOrDie(env, "android/hardware/Camera", camMethods, NELEM(camMethods));
1168}
1169