android_hardware_Camera.cpp revision a1d662716b3da384dfe3a758f079e0cbd089784a 
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#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    rect_left;
52    jfieldID    rect_top;
53    jfieldID    rect_right;
54    jfieldID    rect_bottom;
55    jmethodID   post_event;
56    jmethodID   rect_constructor;
57    jmethodID   face_constructor;
58};
59
60static fields_t fields;
61static Mutex sLock;
62
63// provides persistent context for calls from native code to Java
64class JNICameraContext: public CameraListener
65{
66public:
67    JNICameraContext(JNIEnv* env, jobject weak_this, jclass clazz, const sp<Camera>& camera);
68    ~JNICameraContext() { release(); }
69    virtual void notify(int32_t msgType, int32_t ext1, int32_t ext2);
70    virtual void postData(int32_t msgType, const sp<IMemory>& dataPtr,
71                          camera_frame_metadata_t *metadata);
72    virtual void postDataTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr);
73    void postMetadata(JNIEnv *env, int32_t msgType, camera_frame_metadata_t *metadata);
74    void addCallbackBuffer(JNIEnv *env, jbyteArray cbb, int msgType);
75    void setCallbackMode(JNIEnv *env, bool installed, bool manualMode);
76    sp<Camera> getCamera() { Mutex::Autolock _l(mLock); return mCamera; }
77    bool isRawImageCallbackBufferAvailable() const;
78    void release();
79
80private:
81    void copyAndPost(JNIEnv* env, const sp<IMemory>& dataPtr, int msgType);
82    void clearCallbackBuffers_l(JNIEnv *env, Vector<jbyteArray> *buffers);
83    void clearCallbackBuffers_l(JNIEnv *env);
84    jbyteArray getCallbackBuffer(JNIEnv *env, Vector<jbyteArray> *buffers, size_t bufferSize);
85
86    jobject     mCameraJObjectWeak;     // weak reference to java object
87    jclass      mCameraJClass;          // strong reference to java class
88    sp<Camera>  mCamera;                // strong reference to native object
89    jclass      mFaceClass;  // strong reference to Face class
90    jclass      mRectClass;  // strong reference to Rect class
91    Mutex       mLock;
92
93    /*
94     * Global reference application-managed raw image buffer queue.
95     *
96     * Manual-only mode is supported for raw image callbacks, which is
97     * set whenever method addCallbackBuffer() with msgType =
98     * CAMERA_MSG_RAW_IMAGE is called; otherwise, null is returned
99     * with raw image callbacks.
100     */
101    Vector<jbyteArray> mRawImageCallbackBuffers;
102
103    /*
104     * Application-managed preview buffer queue and the flags
105     * associated with the usage of the preview buffer callback.
106     */
107    Vector<jbyteArray> mCallbackBuffers; // Global reference application managed byte[]
108    bool mManualBufferMode;              // Whether to use application managed buffers.
109    bool mManualCameraCallbackSet;       // Whether the callback has been set, used to
110                                         // reduce unnecessary calls to set the callback.
111};
112
113bool JNICameraContext::isRawImageCallbackBufferAvailable() const
114{
115    return !mRawImageCallbackBuffers.isEmpty();
116}
117
118sp<Camera> get_native_camera(JNIEnv *env, jobject thiz, JNICameraContext** pContext)
119{
120    sp<Camera> camera;
121    Mutex::Autolock _l(sLock);
122    JNICameraContext* context = reinterpret_cast<JNICameraContext*>(env->GetLongField(thiz, fields.context));
123    if (context != NULL) {
124        camera = context->getCamera();
125    }
126    ALOGV("get_native_camera: context=%p, camera=%p", context, camera.get());
127    if (camera == 0) {
128        jniThrowRuntimeException(env, "Method called after release()");
129    }
130
131    if (pContext != NULL) *pContext = context;
132    return camera;
133}
134
135JNICameraContext::JNICameraContext(JNIEnv* env, jobject weak_this, jclass clazz, const sp<Camera>& camera)
136{
137    mCameraJObjectWeak = env->NewGlobalRef(weak_this);
138    mCameraJClass = (jclass)env->NewGlobalRef(clazz);
139    mCamera = camera;
140
141    jclass faceClazz = env->FindClass("android/hardware/Camera$Face");
142    mFaceClass = (jclass) env->NewGlobalRef(faceClazz);
143
144    jclass rectClazz = env->FindClass("android/graphics/Rect");
145    mRectClass = (jclass) env->NewGlobalRef(rectClazz);
146
147    mManualBufferMode = false;
148    mManualCameraCallbackSet = false;
149}
150
151void JNICameraContext::release()
152{
153    ALOGV("release");
154    Mutex::Autolock _l(mLock);
155    JNIEnv *env = AndroidRuntime::getJNIEnv();
156
157    if (mCameraJObjectWeak != NULL) {
158        env->DeleteGlobalRef(mCameraJObjectWeak);
159        mCameraJObjectWeak = NULL;
160    }
161    if (mCameraJClass != NULL) {
162        env->DeleteGlobalRef(mCameraJClass);
163        mCameraJClass = NULL;
164    }
165    if (mFaceClass != NULL) {
166        env->DeleteGlobalRef(mFaceClass);
167        mFaceClass = NULL;
168    }
169    if (mRectClass != NULL) {
170        env->DeleteGlobalRef(mRectClass);
171        mRectClass = NULL;
172    }
173    clearCallbackBuffers_l(env);
174    mCamera.clear();
175}
176
177void JNICameraContext::notify(int32_t msgType, int32_t ext1, int32_t ext2)
178{
179    ALOGV("notify");
180
181    // VM pointer will be NULL if object is released
182    Mutex::Autolock _l(mLock);
183    if (mCameraJObjectWeak == NULL) {
184        ALOGW("callback on dead camera object");
185        return;
186    }
187    JNIEnv *env = AndroidRuntime::getJNIEnv();
188
189    /*
190     * If the notification or msgType is CAMERA_MSG_RAW_IMAGE_NOTIFY, change it
191     * to CAMERA_MSG_RAW_IMAGE since CAMERA_MSG_RAW_IMAGE_NOTIFY is not exposed
192     * to the Java app.
193     */
194    if (msgType == CAMERA_MSG_RAW_IMAGE_NOTIFY) {
195        msgType = CAMERA_MSG_RAW_IMAGE;
196    }
197
198    env->CallStaticVoidMethod(mCameraJClass, fields.post_event,
199            mCameraJObjectWeak, msgType, ext1, ext2, NULL);
200}
201
202jbyteArray JNICameraContext::getCallbackBuffer(
203        JNIEnv* env, Vector<jbyteArray>* buffers, size_t bufferSize)
204{
205    jbyteArray obj = NULL;
206
207    // Vector access should be protected by lock in postData()
208    if (!buffers->isEmpty()) {
209        ALOGV("Using callback buffer from queue of length %d", buffers->size());
210        jbyteArray globalBuffer = buffers->itemAt(0);
211        buffers->removeAt(0);
212
213        obj = (jbyteArray)env->NewLocalRef(globalBuffer);
214        env->DeleteGlobalRef(globalBuffer);
215
216        if (obj != NULL) {
217            jsize bufferLength = env->GetArrayLength(obj);
218            if ((int)bufferLength < (int)bufferSize) {
219                ALOGE("Callback buffer was too small! Expected %d bytes, but got %d bytes!",
220                    bufferSize, bufferLength);
221                env->DeleteLocalRef(obj);
222                return NULL;
223            }
224        }
225    }
226
227    return obj;
228}
229
230void JNICameraContext::copyAndPost(JNIEnv* env, const sp<IMemory>& dataPtr, int msgType)
231{
232    jbyteArray obj = NULL;
233
234    // allocate Java byte array and copy data
235    if (dataPtr != NULL) {
236        ssize_t offset;
237        size_t size;
238        sp<IMemoryHeap> heap = dataPtr->getMemory(&offset, &size);
239        ALOGV("copyAndPost: off=%zd, size=%zu", offset, size);
240        uint8_t *heapBase = (uint8_t*)heap->base();
241
242        if (heapBase != NULL) {
243            const jbyte* data = reinterpret_cast<const jbyte*>(heapBase + offset);
244
245            if (msgType == CAMERA_MSG_RAW_IMAGE) {
246                obj = getCallbackBuffer(env, &mRawImageCallbackBuffers, size);
247            } else if (msgType == CAMERA_MSG_PREVIEW_FRAME && mManualBufferMode) {
248                obj = getCallbackBuffer(env, &mCallbackBuffers, size);
249
250                if (mCallbackBuffers.isEmpty()) {
251                    ALOGV("Out of buffers, clearing callback!");
252                    mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_NOOP);
253                    mManualCameraCallbackSet = false;
254
255                    if (obj == NULL) {
256                        return;
257                    }
258                }
259            } else {
260                ALOGV("Allocating callback buffer");
261                obj = env->NewByteArray(size);
262            }
263
264            if (obj == NULL) {
265                ALOGE("Couldn't allocate byte array for JPEG data");
266                env->ExceptionClear();
267            } else {
268                env->SetByteArrayRegion(obj, 0, size, data);
269            }
270        } else {
271            ALOGE("image heap is NULL");
272        }
273    }
274
275    // post image data to Java
276    env->CallStaticVoidMethod(mCameraJClass, fields.post_event,
277            mCameraJObjectWeak, msgType, 0, 0, obj);
278    if (obj) {
279        env->DeleteLocalRef(obj);
280    }
281}
282
283void JNICameraContext::postData(int32_t msgType, const sp<IMemory>& dataPtr,
284                                camera_frame_metadata_t *metadata)
285{
286    // VM pointer will be NULL if object is released
287    Mutex::Autolock _l(mLock);
288    JNIEnv *env = AndroidRuntime::getJNIEnv();
289    if (mCameraJObjectWeak == NULL) {
290        ALOGW("callback on dead camera object");
291        return;
292    }
293
294    int32_t dataMsgType = msgType & ~CAMERA_MSG_PREVIEW_METADATA;
295
296    // return data based on callback type
297    switch (dataMsgType) {
298        case CAMERA_MSG_VIDEO_FRAME:
299            // should never happen
300            break;
301
302        // For backward-compatibility purpose, if there is no callback
303        // buffer for raw image, the callback returns null.
304        case CAMERA_MSG_RAW_IMAGE:
305            ALOGV("rawCallback");
306            if (mRawImageCallbackBuffers.isEmpty()) {
307                env->CallStaticVoidMethod(mCameraJClass, fields.post_event,
308                        mCameraJObjectWeak, dataMsgType, 0, 0, NULL);
309            } else {
310                copyAndPost(env, dataPtr, dataMsgType);
311            }
312            break;
313
314        // There is no data.
315        case 0:
316            break;
317
318        default:
319            ALOGV("dataCallback(%d, %p)", dataMsgType, dataPtr.get());
320            copyAndPost(env, dataPtr, dataMsgType);
321            break;
322    }
323
324    // post frame metadata to Java
325    if (metadata && (msgType & CAMERA_MSG_PREVIEW_METADATA)) {
326        postMetadata(env, CAMERA_MSG_PREVIEW_METADATA, metadata);
327    }
328}
329
330void JNICameraContext::postDataTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr)
331{
332    // TODO: plumb up to Java. For now, just drop the timestamp
333    postData(msgType, dataPtr, NULL);
334}
335
336void JNICameraContext::postMetadata(JNIEnv *env, int32_t msgType, camera_frame_metadata_t *metadata)
337{
338    jobjectArray obj = NULL;
339    obj = (jobjectArray) env->NewObjectArray(metadata->number_of_faces,
340                                             mFaceClass, NULL);
341    if (obj == NULL) {
342        ALOGE("Couldn't allocate face metadata array");
343        return;
344    }
345
346    for (int i = 0; i < metadata->number_of_faces; i++) {
347        jobject face = env->NewObject(mFaceClass, fields.face_constructor);
348        env->SetObjectArrayElement(obj, i, face);
349
350        jobject rect = env->NewObject(mRectClass, fields.rect_constructor);
351        env->SetIntField(rect, fields.rect_left, metadata->faces[i].rect[0]);
352        env->SetIntField(rect, fields.rect_top, metadata->faces[i].rect[1]);
353        env->SetIntField(rect, fields.rect_right, metadata->faces[i].rect[2]);
354        env->SetIntField(rect, fields.rect_bottom, metadata->faces[i].rect[3]);
355
356        env->SetObjectField(face, fields.face_rect, rect);
357        env->SetIntField(face, fields.face_score, metadata->faces[i].score);
358
359        env->DeleteLocalRef(face);
360        env->DeleteLocalRef(rect);
361    }
362    env->CallStaticVoidMethod(mCameraJClass, fields.post_event,
363            mCameraJObjectWeak, msgType, 0, 0, obj);
364    env->DeleteLocalRef(obj);
365}
366
367void JNICameraContext::setCallbackMode(JNIEnv *env, bool installed, bool manualMode)
368{
369    Mutex::Autolock _l(mLock);
370    mManualBufferMode = manualMode;
371    mManualCameraCallbackSet = false;
372
373    // In order to limit the over usage of binder threads, all non-manual buffer
374    // callbacks use CAMERA_FRAME_CALLBACK_FLAG_BARCODE_SCANNER mode now.
375    //
376    // Continuous callbacks will have the callback re-registered from handleMessage.
377    // Manual buffer mode will operate as fast as possible, relying on the finite supply
378    // of buffers for throttling.
379
380    if (!installed) {
381        mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_NOOP);
382        clearCallbackBuffers_l(env, &mCallbackBuffers);
383    } else if (mManualBufferMode) {
384        if (!mCallbackBuffers.isEmpty()) {
385            mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_CAMERA);
386            mManualCameraCallbackSet = true;
387        }
388    } else {
389        mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_BARCODE_SCANNER);
390        clearCallbackBuffers_l(env, &mCallbackBuffers);
391    }
392}
393
394void JNICameraContext::addCallbackBuffer(
395        JNIEnv *env, jbyteArray cbb, int msgType)
396{
397    ALOGV("addCallbackBuffer: 0x%x", msgType);
398    if (cbb != NULL) {
399        Mutex::Autolock _l(mLock);
400        switch (msgType) {
401            case CAMERA_MSG_PREVIEW_FRAME: {
402                jbyteArray callbackBuffer = (jbyteArray)env->NewGlobalRef(cbb);
403                mCallbackBuffers.push(callbackBuffer);
404
405                ALOGV("Adding callback buffer to queue, %d total",
406                        mCallbackBuffers.size());
407
408                // We want to make sure the camera knows we're ready for the
409                // next frame. This may have come unset had we not had a
410                // callbackbuffer ready for it last time.
411                if (mManualBufferMode && !mManualCameraCallbackSet) {
412                    mCamera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_CAMERA);
413                    mManualCameraCallbackSet = true;
414                }
415                break;
416            }
417            case CAMERA_MSG_RAW_IMAGE: {
418                jbyteArray callbackBuffer = (jbyteArray)env->NewGlobalRef(cbb);
419                mRawImageCallbackBuffers.push(callbackBuffer);
420                break;
421            }
422            default: {
423                jniThrowException(env,
424                        "java/lang/IllegalArgumentException",
425                        "Unsupported message type");
426                return;
427            }
428        }
429    } else {
430       ALOGE("Null byte array!");
431    }
432}
433
434void JNICameraContext::clearCallbackBuffers_l(JNIEnv *env)
435{
436    clearCallbackBuffers_l(env, &mCallbackBuffers);
437    clearCallbackBuffers_l(env, &mRawImageCallbackBuffers);
438}
439
440void JNICameraContext::clearCallbackBuffers_l(JNIEnv *env, Vector<jbyteArray> *buffers) {
441    ALOGV("Clearing callback buffers, %d remained", buffers->size());
442    while (!buffers->isEmpty()) {
443        env->DeleteGlobalRef(buffers->top());
444        buffers->pop();
445    }
446}
447
448static jint android_hardware_Camera_getNumberOfCameras(JNIEnv *env, jobject thiz)
449{
450    return Camera::getNumberOfCameras();
451}
452
453static void android_hardware_Camera_getCameraInfo(JNIEnv *env, jobject thiz,
454    jint cameraId, jobject info_obj)
455{
456    CameraInfo cameraInfo;
457    status_t rc = Camera::getCameraInfo(cameraId, &cameraInfo);
458    if (rc != NO_ERROR) {
459        jniThrowRuntimeException(env, "Fail to get camera info");
460        return;
461    }
462    env->SetIntField(info_obj, fields.facing, cameraInfo.facing);
463    env->SetIntField(info_obj, fields.orientation, cameraInfo.orientation);
464
465    char value[PROPERTY_VALUE_MAX];
466    property_get("ro.camera.sound.forced", value, "0");
467    jboolean canDisableShutterSound = (strncmp(value, "0", 2) == 0);
468    env->SetBooleanField(info_obj, fields.canDisableShutterSound,
469            canDisableShutterSound);
470}
471
472// connect to camera service
473static jint android_hardware_Camera_native_setup(JNIEnv *env, jobject thiz,
474    jobject weak_this, jint cameraId, jint halVersion, jstring clientPackageName)
475{
476    // Convert jstring to String16
477    const char16_t *rawClientName = env->GetStringChars(clientPackageName, NULL);
478    jsize rawClientNameLen = env->GetStringLength(clientPackageName);
479    String16 clientName(rawClientName, rawClientNameLen);
480    env->ReleaseStringChars(clientPackageName, rawClientName);
481
482    sp<Camera> camera;
483    if (halVersion == CAMERA_HAL_API_VERSION_NORMAL_CONNECT) {
484        // Default path: hal version is don't care, do normal camera connect.
485        camera = Camera::connect(cameraId, clientName,
486                Camera::USE_CALLING_UID);
487    } else {
488        jint status = Camera::connectLegacy(cameraId, halVersion, clientName,
489                Camera::USE_CALLING_UID, camera);
490        if (status != NO_ERROR) {
491            return status;
492        }
493    }
494
495    if (camera == NULL) {
496        return -EACCES;
497    }
498
499    // make sure camera hardware is alive
500    if (camera->getStatus() != NO_ERROR) {
501        return NO_INIT;
502    }
503
504    jclass clazz = env->GetObjectClass(thiz);
505    if (clazz == NULL) {
506        // This should never happen
507        jniThrowRuntimeException(env, "Can't find android/hardware/Camera");
508        return INVALID_OPERATION;
509    }
510
511    // We use a weak reference so the Camera object can be garbage collected.
512    // The reference is only used as a proxy for callbacks.
513    sp<JNICameraContext> context = new JNICameraContext(env, weak_this, clazz, camera);
514    context->incStrong((void*)android_hardware_Camera_native_setup);
515    camera->setListener(context);
516
517    // save context in opaque field
518    env->SetLongField(thiz, fields.context, (jlong)context.get());
519    return NO_ERROR;
520}
521
522// disconnect from camera service
523// It's okay to call this when the native camera context is already null.
524// This handles the case where the user has called release() and the
525// finalizer is invoked later.
526static void android_hardware_Camera_release(JNIEnv *env, jobject thiz)
527{
528    ALOGV("release camera");
529    JNICameraContext* context = NULL;
530    sp<Camera> camera;
531    {
532        Mutex::Autolock _l(sLock);
533        context = reinterpret_cast<JNICameraContext*>(env->GetLongField(thiz, fields.context));
534
535        // Make sure we do not attempt to callback on a deleted Java object.
536        env->SetLongField(thiz, fields.context, 0);
537    }
538
539    // clean up if release has not been called before
540    if (context != NULL) {
541        camera = context->getCamera();
542        context->release();
543        ALOGV("native_release: context=%p camera=%p", context, camera.get());
544
545        // clear callbacks
546        if (camera != NULL) {
547            camera->setPreviewCallbackFlags(CAMERA_FRAME_CALLBACK_FLAG_NOOP);
548            camera->disconnect();
549        }
550
551        // remove context to prevent further Java access
552        context->decStrong((void*)android_hardware_Camera_native_setup);
553    }
554}
555
556static void android_hardware_Camera_setPreviewSurface(JNIEnv *env, jobject thiz, jobject jSurface)
557{
558    ALOGV("setPreviewSurface");
559    sp<Camera> camera = get_native_camera(env, thiz, NULL);
560    if (camera == 0) return;
561
562    sp<IGraphicBufferProducer> gbp;
563    sp<Surface> surface;
564    if (jSurface) {
565        surface = android_view_Surface_getSurface(env, jSurface);
566        if (surface != NULL) {
567            gbp = surface->getIGraphicBufferProducer();
568        }
569    }
570
571    if (camera->setPreviewTarget(gbp) != NO_ERROR) {
572        jniThrowException(env, "java/io/IOException", "setPreviewTexture failed");
573    }
574}
575
576static void android_hardware_Camera_setPreviewTexture(JNIEnv *env,
577        jobject thiz, jobject jSurfaceTexture)
578{
579    ALOGV("setPreviewTexture");
580    sp<Camera> camera = get_native_camera(env, thiz, NULL);
581    if (camera == 0) return;
582
583    sp<IGraphicBufferProducer> producer = NULL;
584    if (jSurfaceTexture != NULL) {
585        producer = SurfaceTexture_getProducer(env, jSurfaceTexture);
586        if (producer == NULL) {
587            jniThrowException(env, "java/lang/IllegalArgumentException",
588                    "SurfaceTexture already released in setPreviewTexture");
589            return;
590        }
591
592    }
593
594    if (camera->setPreviewTarget(producer) != NO_ERROR) {
595        jniThrowException(env, "java/io/IOException",
596                "setPreviewTexture failed");
597    }
598}
599
600static void android_hardware_Camera_setPreviewCallbackSurface(JNIEnv *env,
601        jobject thiz, jobject jSurface)
602{
603    ALOGV("setPreviewCallbackSurface");
604    JNICameraContext* context;
605    sp<Camera> camera = get_native_camera(env, thiz, &context);
606    if (camera == 0) return;
607
608    sp<IGraphicBufferProducer> gbp;
609    sp<Surface> surface;
610    if (jSurface) {
611        surface = android_view_Surface_getSurface(env, jSurface);
612        if (surface != NULL) {
613            gbp = surface->getIGraphicBufferProducer();
614        }
615    }
616    // Clear out normal preview callbacks
617    context->setCallbackMode(env, false, false);
618    // Then set up callback surface
619    if (camera->setPreviewCallbackTarget(gbp) != NO_ERROR) {
620        jniThrowException(env, "java/io/IOException", "setPreviewCallbackTarget failed");
621    }
622}
623
624static void android_hardware_Camera_startPreview(JNIEnv *env, jobject thiz)
625{
626    ALOGV("startPreview");
627    sp<Camera> camera = get_native_camera(env, thiz, NULL);
628    if (camera == 0) return;
629
630    if (camera->startPreview() != NO_ERROR) {
631        jniThrowRuntimeException(env, "startPreview failed");
632        return;
633    }
634}
635
636static void android_hardware_Camera_stopPreview(JNIEnv *env, jobject thiz)
637{
638    ALOGV("stopPreview");
639    sp<Camera> c = get_native_camera(env, thiz, NULL);
640    if (c == 0) return;
641
642    c->stopPreview();
643}
644
645static jboolean android_hardware_Camera_previewEnabled(JNIEnv *env, jobject thiz)
646{
647    ALOGV("previewEnabled");
648    sp<Camera> c = get_native_camera(env, thiz, NULL);
649    if (c == 0) return JNI_FALSE;
650
651    return c->previewEnabled() ? JNI_TRUE : JNI_FALSE;
652}
653
654static void android_hardware_Camera_setHasPreviewCallback(JNIEnv *env, jobject thiz, jboolean installed, jboolean manualBuffer)
655{
656    ALOGV("setHasPreviewCallback: installed:%d, manualBuffer:%d", (int)installed, (int)manualBuffer);
657    // Important: Only install preview_callback if the Java code has called
658    // setPreviewCallback() with a non-null value, otherwise we'd pay to memcpy
659    // each preview frame for nothing.
660    JNICameraContext* context;
661    sp<Camera> camera = get_native_camera(env, thiz, &context);
662    if (camera == 0) return;
663
664    // setCallbackMode will take care of setting the context flags and calling
665    // camera->setPreviewCallbackFlags within a mutex for us.
666    context->setCallbackMode(env, installed, manualBuffer);
667}
668
669static void android_hardware_Camera_addCallbackBuffer(JNIEnv *env, jobject thiz, jbyteArray bytes, jint msgType) {
670    ALOGV("addCallbackBuffer: 0x%x", msgType);
671
672    JNICameraContext* context = reinterpret_cast<JNICameraContext*>(env->GetLongField(thiz, fields.context));
673
674    if (context != NULL) {
675        context->addCallbackBuffer(env, bytes, msgType);
676    }
677}
678
679static void android_hardware_Camera_autoFocus(JNIEnv *env, jobject thiz)
680{
681    ALOGV("autoFocus");
682    JNICameraContext* context;
683    sp<Camera> c = get_native_camera(env, thiz, &context);
684    if (c == 0) return;
685
686    if (c->autoFocus() != NO_ERROR) {
687        jniThrowRuntimeException(env, "autoFocus failed");
688    }
689}
690
691static void android_hardware_Camera_cancelAutoFocus(JNIEnv *env, jobject thiz)
692{
693    ALOGV("cancelAutoFocus");
694    JNICameraContext* context;
695    sp<Camera> c = get_native_camera(env, thiz, &context);
696    if (c == 0) return;
697
698    if (c->cancelAutoFocus() != NO_ERROR) {
699        jniThrowRuntimeException(env, "cancelAutoFocus failed");
700    }
701}
702
703static void android_hardware_Camera_takePicture(JNIEnv *env, jobject thiz, jint msgType)
704{
705    ALOGV("takePicture");
706    JNICameraContext* context;
707    sp<Camera> camera = get_native_camera(env, thiz, &context);
708    if (camera == 0) return;
709
710    /*
711     * When CAMERA_MSG_RAW_IMAGE is requested, if the raw image callback
712     * buffer is available, CAMERA_MSG_RAW_IMAGE is enabled to get the
713     * notification _and_ the data; otherwise, CAMERA_MSG_RAW_IMAGE_NOTIFY
714     * is enabled to receive the callback notification but no data.
715     *
716     * Note that CAMERA_MSG_RAW_IMAGE_NOTIFY is not exposed to the
717     * Java application.
718     */
719    if (msgType & CAMERA_MSG_RAW_IMAGE) {
720        ALOGV("Enable raw image callback buffer");
721        if (!context->isRawImageCallbackBufferAvailable()) {
722            ALOGV("Enable raw image notification, since no callback buffer exists");
723            msgType &= ~CAMERA_MSG_RAW_IMAGE;
724            msgType |= CAMERA_MSG_RAW_IMAGE_NOTIFY;
725        }
726    }
727
728    if (camera->takePicture(msgType) != NO_ERROR) {
729        jniThrowRuntimeException(env, "takePicture failed");
730        return;
731    }
732}
733
734static void android_hardware_Camera_setParameters(JNIEnv *env, jobject thiz, jstring params)
735{
736    ALOGV("setParameters");
737    sp<Camera> camera = get_native_camera(env, thiz, NULL);
738    if (camera == 0) return;
739
740    const jchar* str = env->GetStringCritical(params, 0);
741    String8 params8;
742    if (params) {
743        params8 = String8(str, env->GetStringLength(params));
744        env->ReleaseStringCritical(params, str);
745    }
746    if (camera->setParameters(params8) != NO_ERROR) {
747        jniThrowRuntimeException(env, "setParameters failed");
748        return;
749    }
750}
751
752static jstring android_hardware_Camera_getParameters(JNIEnv *env, jobject thiz)
753{
754    ALOGV("getParameters");
755    sp<Camera> camera = get_native_camera(env, thiz, NULL);
756    if (camera == 0) return 0;
757
758    String8 params8 = camera->getParameters();
759    if (params8.isEmpty()) {
760        jniThrowRuntimeException(env, "getParameters failed (empty parameters)");
761        return 0;
762    }
763    return env->NewStringUTF(params8.string());
764}
765
766static void android_hardware_Camera_reconnect(JNIEnv *env, jobject thiz)
767{
768    ALOGV("reconnect");
769    sp<Camera> camera = get_native_camera(env, thiz, NULL);
770    if (camera == 0) return;
771
772    if (camera->reconnect() != NO_ERROR) {
773        jniThrowException(env, "java/io/IOException", "reconnect failed");
774        return;
775    }
776}
777
778static void android_hardware_Camera_lock(JNIEnv *env, jobject thiz)
779{
780    ALOGV("lock");
781    sp<Camera> camera = get_native_camera(env, thiz, NULL);
782    if (camera == 0) return;
783
784    if (camera->lock() != NO_ERROR) {
785        jniThrowRuntimeException(env, "lock failed");
786    }
787}
788
789static void android_hardware_Camera_unlock(JNIEnv *env, jobject thiz)
790{
791    ALOGV("unlock");
792    sp<Camera> camera = get_native_camera(env, thiz, NULL);
793    if (camera == 0) return;
794
795    if (camera->unlock() != NO_ERROR) {
796        jniThrowRuntimeException(env, "unlock failed");
797    }
798}
799
800static void android_hardware_Camera_startSmoothZoom(JNIEnv *env, jobject thiz, jint value)
801{
802    ALOGV("startSmoothZoom");
803    sp<Camera> camera = get_native_camera(env, thiz, NULL);
804    if (camera == 0) return;
805
806    status_t rc = camera->sendCommand(CAMERA_CMD_START_SMOOTH_ZOOM, value, 0);
807    if (rc == BAD_VALUE) {
808        char msg[64];
809        sprintf(msg, "invalid zoom value=%d", value);
810        jniThrowException(env, "java/lang/IllegalArgumentException", msg);
811    } else if (rc != NO_ERROR) {
812        jniThrowRuntimeException(env, "start smooth zoom failed");
813    }
814}
815
816static void android_hardware_Camera_stopSmoothZoom(JNIEnv *env, jobject thiz)
817{
818    ALOGV("stopSmoothZoom");
819    sp<Camera> camera = get_native_camera(env, thiz, NULL);
820    if (camera == 0) return;
821
822    if (camera->sendCommand(CAMERA_CMD_STOP_SMOOTH_ZOOM, 0, 0) != NO_ERROR) {
823        jniThrowRuntimeException(env, "stop smooth zoom failed");
824    }
825}
826
827static void android_hardware_Camera_setDisplayOrientation(JNIEnv *env, jobject thiz,
828        jint value)
829{
830    ALOGV("setDisplayOrientation");
831    sp<Camera> camera = get_native_camera(env, thiz, NULL);
832    if (camera == 0) return;
833
834    if (camera->sendCommand(CAMERA_CMD_SET_DISPLAY_ORIENTATION, value, 0) != NO_ERROR) {
835        jniThrowRuntimeException(env, "set display orientation failed");
836    }
837}
838
839static jboolean android_hardware_Camera_enableShutterSound(JNIEnv *env, jobject thiz,
840        jboolean enabled)
841{
842    ALOGV("enableShutterSound");
843    sp<Camera> camera = get_native_camera(env, thiz, NULL);
844    if (camera == 0) return JNI_FALSE;
845
846    int32_t value = (enabled == JNI_TRUE) ? 1 : 0;
847    status_t rc = camera->sendCommand(CAMERA_CMD_ENABLE_SHUTTER_SOUND, value, 0);
848    if (rc == NO_ERROR) {
849        return JNI_TRUE;
850    } else if (rc == PERMISSION_DENIED) {
851        return JNI_FALSE;
852    } else {
853        jniThrowRuntimeException(env, "enable shutter sound failed");
854        return JNI_FALSE;
855    }
856}
857
858static void android_hardware_Camera_startFaceDetection(JNIEnv *env, jobject thiz,
859        jint type)
860{
861    ALOGV("startFaceDetection");
862    JNICameraContext* context;
863    sp<Camera> camera = get_native_camera(env, thiz, &context);
864    if (camera == 0) return;
865
866    status_t rc = camera->sendCommand(CAMERA_CMD_START_FACE_DETECTION, type, 0);
867    if (rc == BAD_VALUE) {
868        char msg[64];
869        snprintf(msg, sizeof(msg), "invalid face detection type=%d", type);
870        jniThrowException(env, "java/lang/IllegalArgumentException", msg);
871    } else if (rc != NO_ERROR) {
872        jniThrowRuntimeException(env, "start face detection failed");
873    }
874}
875
876static void android_hardware_Camera_stopFaceDetection(JNIEnv *env, jobject thiz)
877{
878    ALOGV("stopFaceDetection");
879    sp<Camera> camera = get_native_camera(env, thiz, NULL);
880    if (camera == 0) return;
881
882    if (camera->sendCommand(CAMERA_CMD_STOP_FACE_DETECTION, 0, 0) != NO_ERROR) {
883        jniThrowRuntimeException(env, "stop face detection failed");
884    }
885}
886
887static void android_hardware_Camera_enableFocusMoveCallback(JNIEnv *env, jobject thiz, jint enable)
888{
889    ALOGV("enableFocusMoveCallback");
890    sp<Camera> camera = get_native_camera(env, thiz, NULL);
891    if (camera == 0) return;
892
893    if (camera->sendCommand(CAMERA_CMD_ENABLE_FOCUS_MOVE_MSG, enable, 0) != NO_ERROR) {
894        jniThrowRuntimeException(env, "enable focus move callback failed");
895    }
896}
897
898//-------------------------------------------------
899
900static JNINativeMethod camMethods[] = {
901  { "getNumberOfCameras",
902    "()I",
903    (void *)android_hardware_Camera_getNumberOfCameras },
904  { "_getCameraInfo",
905    "(ILandroid/hardware/Camera$CameraInfo;)V",
906    (void*)android_hardware_Camera_getCameraInfo },
907  { "native_setup",
908    "(Ljava/lang/Object;IILjava/lang/String;)I",
909    (void*)android_hardware_Camera_native_setup },
910  { "native_release",
911    "()V",
912    (void*)android_hardware_Camera_release },
913  { "setPreviewSurface",
914    "(Landroid/view/Surface;)V",
915    (void *)android_hardware_Camera_setPreviewSurface },
916  { "setPreviewTexture",
917    "(Landroid/graphics/SurfaceTexture;)V",
918    (void *)android_hardware_Camera_setPreviewTexture },
919  { "setPreviewCallbackSurface",
920    "(Landroid/view/Surface;)V",
921    (void *)android_hardware_Camera_setPreviewCallbackSurface },
922  { "startPreview",
923    "()V",
924    (void *)android_hardware_Camera_startPreview },
925  { "_stopPreview",
926    "()V",
927    (void *)android_hardware_Camera_stopPreview },
928  { "previewEnabled",
929    "()Z",
930    (void *)android_hardware_Camera_previewEnabled },
931  { "setHasPreviewCallback",
932    "(ZZ)V",
933    (void *)android_hardware_Camera_setHasPreviewCallback },
934  { "_addCallbackBuffer",
935    "([BI)V",
936    (void *)android_hardware_Camera_addCallbackBuffer },
937  { "native_autoFocus",
938    "()V",
939    (void *)android_hardware_Camera_autoFocus },
940  { "native_cancelAutoFocus",
941    "()V",
942    (void *)android_hardware_Camera_cancelAutoFocus },
943  { "native_takePicture",
944    "(I)V",
945    (void *)android_hardware_Camera_takePicture },
946  { "native_setParameters",
947    "(Ljava/lang/String;)V",
948    (void *)android_hardware_Camera_setParameters },
949  { "native_getParameters",
950    "()Ljava/lang/String;",
951    (void *)android_hardware_Camera_getParameters },
952  { "reconnect",
953    "()V",
954    (void*)android_hardware_Camera_reconnect },
955  { "lock",
956    "()V",
957    (void*)android_hardware_Camera_lock },
958  { "unlock",
959    "()V",
960    (void*)android_hardware_Camera_unlock },
961  { "startSmoothZoom",
962    "(I)V",
963    (void *)android_hardware_Camera_startSmoothZoom },
964  { "stopSmoothZoom",
965    "()V",
966    (void *)android_hardware_Camera_stopSmoothZoom },
967  { "setDisplayOrientation",
968    "(I)V",
969    (void *)android_hardware_Camera_setDisplayOrientation },
970  { "_enableShutterSound",
971    "(Z)Z",
972    (void *)android_hardware_Camera_enableShutterSound },
973  { "_startFaceDetection",
974    "(I)V",
975    (void *)android_hardware_Camera_startFaceDetection },
976  { "_stopFaceDetection",
977    "()V",
978    (void *)android_hardware_Camera_stopFaceDetection},
979  { "enableFocusMoveCallback",
980    "(I)V",
981    (void *)android_hardware_Camera_enableFocusMoveCallback},
982};
983
984struct field {
985    const char *class_name;
986    const char *field_name;
987    const char *field_type;
988    jfieldID   *jfield;
989};
990
991static int find_fields(JNIEnv *env, field *fields, int count)
992{
993    for (int i = 0; i < count; i++) {
994        field *f = &fields[i];
995        jclass clazz = env->FindClass(f->class_name);
996        if (clazz == NULL) {
997            ALOGE("Can't find %s", f->class_name);
998            return -1;
999        }
1000
1001        jfieldID field = env->GetFieldID(clazz, f->field_name, f->field_type);
1002        if (field == NULL) {
1003            ALOGE("Can't find %s.%s", f->class_name, f->field_name);
1004            return -1;
1005        }
1006
1007        *(f->jfield) = field;
1008    }
1009
1010    return 0;
1011}
1012
1013// Get all the required offsets in java class and register native functions
1014int register_android_hardware_Camera(JNIEnv *env)
1015{
1016    field fields_to_find[] = {
1017        { "android/hardware/Camera", "mNativeContext",   "J", &fields.context },
1018        { "android/hardware/Camera$CameraInfo", "facing",   "I", &fields.facing },
1019        { "android/hardware/Camera$CameraInfo", "orientation",   "I", &fields.orientation },
1020        { "android/hardware/Camera$CameraInfo", "canDisableShutterSound",   "Z",
1021          &fields.canDisableShutterSound },
1022        { "android/hardware/Camera$Face", "rect", "Landroid/graphics/Rect;", &fields.face_rect },
1023        { "android/hardware/Camera$Face", "score", "I", &fields.face_score },
1024        { "android/graphics/Rect", "left", "I", &fields.rect_left },
1025        { "android/graphics/Rect", "top", "I", &fields.rect_top },
1026        { "android/graphics/Rect", "right", "I", &fields.rect_right },
1027        { "android/graphics/Rect", "bottom", "I", &fields.rect_bottom },
1028    };
1029
1030    if (find_fields(env, fields_to_find, NELEM(fields_to_find)) < 0)
1031        return -1;
1032
1033    jclass clazz = env->FindClass("android/hardware/Camera");
1034    fields.post_event = env->GetStaticMethodID(clazz, "postEventFromNative",
1035                                               "(Ljava/lang/Object;IIILjava/lang/Object;)V");
1036    if (fields.post_event == NULL) {
1037        ALOGE("Can't find android/hardware/Camera.postEventFromNative");
1038        return -1;
1039    }
1040
1041    clazz = env->FindClass("android/graphics/Rect");
1042    fields.rect_constructor = env->GetMethodID(clazz, "<init>", "()V");
1043    if (fields.rect_constructor == NULL) {
1044        ALOGE("Can't find android/graphics/Rect.Rect()");
1045        return -1;
1046    }
1047
1048    clazz = env->FindClass("android/hardware/Camera$Face");
1049    fields.face_constructor = env->GetMethodID(clazz, "<init>", "()V");
1050    if (fields.face_constructor == NULL) {
1051        ALOGE("Can't find android/hardware/Camera$Face.Face()");
1052        return -1;
1053    }
1054
1055    // Register native functions
1056    return AndroidRuntime::registerNativeMethods(env, "android/hardware/Camera",
1057                                              camMethods, NELEM(camMethods));
1058}
1059