android_media_MediaRecorder.cpp revision 04167d34f5eb2b3a0cc50f4271cf18b33f5483d9 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <assert.h>
18#include <fcntl.h>
19#include <inttypes.h>
20#include <limits.h>
21#include <stdio.h>
22#include <unistd.h>
23
24//#define LOG_NDEBUG 0
25#define LOG_TAG "MediaRecorderJNI"
26#include <utils/Log.h>
27
28#include <gui/Surface.h>
29#include <camera/Camera.h>
30#include <media/mediarecorder.h>
31#include <media/stagefright/PersistentSurface.h>
32#include <utils/threads.h>
33
34#include <ScopedUtfChars.h>
35
36#include "jni.h"
37#include "JNIHelp.h"
38#include "android_runtime/AndroidRuntime.h"
39
40#include <system/audio.h>
41#include <android_runtime/android_view_Surface.h>
42
43// ----------------------------------------------------------------------------
44
45using namespace android;
46
47// ----------------------------------------------------------------------------
48
49// helper function to extract a native Camera object from a Camera Java object
50extern sp<Camera> get_native_camera(JNIEnv *env, jobject thiz, struct JNICameraContext** context);
51extern sp<PersistentSurface>
52android_media_MediaCodec_getPersistentInputSurface(JNIEnv* env, jobject object);
53
54struct fields_t {
55    jfieldID    context;
56    jfieldID    surface;
57
58    jmethodID   post_event;
59};
60static fields_t fields;
61
62static Mutex sLock;
63
64// ----------------------------------------------------------------------------
65// ref-counted object for callbacks
66class JNIMediaRecorderListener: public MediaRecorderListener
67{
68public:
69    JNIMediaRecorderListener(JNIEnv* env, jobject thiz, jobject weak_thiz);
70    ~JNIMediaRecorderListener();
71    void notify(int msg, int ext1, int ext2);
72private:
73    JNIMediaRecorderListener();
74    jclass      mClass;     // Reference to MediaRecorder class
75    jobject     mObject;    // Weak ref to MediaRecorder Java object to call on
76};
77
78JNIMediaRecorderListener::JNIMediaRecorderListener(JNIEnv* env, jobject thiz, jobject weak_thiz)
79{
80
81    // Hold onto the MediaRecorder class for use in calling the static method
82    // that posts events to the application thread.
83    jclass clazz = env->GetObjectClass(thiz);
84    if (clazz == NULL) {
85        ALOGE("Can't find android/media/MediaRecorder");
86        jniThrowException(env, "java/lang/Exception", NULL);
87        return;
88    }
89    mClass = (jclass)env->NewGlobalRef(clazz);
90
91    // We use a weak reference so the MediaRecorder object can be garbage collected.
92    // The reference is only used as a proxy for callbacks.
93    mObject  = env->NewGlobalRef(weak_thiz);
94}
95
96JNIMediaRecorderListener::~JNIMediaRecorderListener()
97{
98    // remove global references
99    JNIEnv *env = AndroidRuntime::getJNIEnv();
100    env->DeleteGlobalRef(mObject);
101    env->DeleteGlobalRef(mClass);
102}
103
104void JNIMediaRecorderListener::notify(int msg, int ext1, int ext2)
105{
106    ALOGV("JNIMediaRecorderListener::notify");
107
108    JNIEnv *env = AndroidRuntime::getJNIEnv();
109    env->CallStaticVoidMethod(mClass, fields.post_event, mObject, msg, ext1, ext2, NULL);
110}
111
112// ----------------------------------------------------------------------------
113
114static sp<Surface> get_surface(JNIEnv* env, jobject clazz)
115{
116    ALOGV("get_surface");
117    return android_view_Surface_getSurface(env, clazz);
118}
119
120static sp<PersistentSurface> get_persistentSurface(JNIEnv* env, jobject object)
121{
122    ALOGV("get_persistentSurface");
123    return android_media_MediaCodec_getPersistentInputSurface(env, object);
124}
125
126// Returns true if it throws an exception.
127static bool process_media_recorder_call(JNIEnv *env, status_t opStatus, const char* exception, const char* message)
128{
129    ALOGV("process_media_recorder_call");
130    if (opStatus == (status_t)INVALID_OPERATION) {
131        jniThrowException(env, "java/lang/IllegalStateException", NULL);
132        return true;
133    } else if (opStatus != (status_t)OK) {
134        jniThrowException(env, exception, message);
135        return true;
136    }
137    return false;
138}
139
140static sp<MediaRecorder> getMediaRecorder(JNIEnv* env, jobject thiz)
141{
142    Mutex::Autolock l(sLock);
143    MediaRecorder* const p = (MediaRecorder*)env->GetLongField(thiz, fields.context);
144    return sp<MediaRecorder>(p);
145}
146
147static sp<MediaRecorder> setMediaRecorder(JNIEnv* env, jobject thiz, const sp<MediaRecorder>& recorder)
148{
149    Mutex::Autolock l(sLock);
150    sp<MediaRecorder> old = (MediaRecorder*)env->GetLongField(thiz, fields.context);
151    if (recorder.get()) {
152        recorder->incStrong(thiz);
153    }
154    if (old != 0) {
155        old->decStrong(thiz);
156    }
157    env->SetLongField(thiz, fields.context, (jlong)recorder.get());
158    return old;
159}
160
161
162static void android_media_MediaRecorder_setCamera(JNIEnv* env, jobject thiz, jobject camera)
163{
164    // we should not pass a null camera to get_native_camera() call.
165    if (camera == NULL) {
166        jniThrowNullPointerException(env, "camera object is a NULL pointer");
167        return;
168    }
169    sp<Camera> c = get_native_camera(env, camera, NULL);
170    if (c == NULL) {
171        // get_native_camera will throw an exception in this case
172        return;
173    }
174    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
175    if (mr == NULL) {
176        jniThrowException(env, "java/lang/IllegalStateException", NULL);
177        return;
178    }
179    process_media_recorder_call(env, mr->setCamera(c->remote(), c->getRecordingProxy()),
180            "java/lang/RuntimeException", "setCamera failed.");
181}
182
183static void
184android_media_MediaRecorder_setVideoSource(JNIEnv *env, jobject thiz, jint vs)
185{
186    ALOGV("setVideoSource(%d)", vs);
187    if (vs < VIDEO_SOURCE_DEFAULT || vs >= VIDEO_SOURCE_LIST_END) {
188        jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid video source");
189        return;
190    }
191    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
192    if (mr == NULL) {
193        jniThrowException(env, "java/lang/IllegalStateException", NULL);
194        return;
195    }
196    process_media_recorder_call(env, mr->setVideoSource(vs), "java/lang/RuntimeException", "setVideoSource failed.");
197}
198
199static void
200android_media_MediaRecorder_setAudioSource(JNIEnv *env, jobject thiz, jint as)
201{
202    ALOGV("setAudioSource(%d)", as);
203    if (as < AUDIO_SOURCE_DEFAULT ||
204        (as >= AUDIO_SOURCE_CNT && as != AUDIO_SOURCE_FM_TUNER)) {
205        jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid audio source");
206        return;
207    }
208
209    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
210    if (mr == NULL) {
211        jniThrowException(env, "java/lang/IllegalStateException", NULL);
212        return;
213    }
214    process_media_recorder_call(env, mr->setAudioSource(as), "java/lang/RuntimeException", "setAudioSource failed.");
215}
216
217static void
218android_media_MediaRecorder_setOutputFormat(JNIEnv *env, jobject thiz, jint of)
219{
220    ALOGV("setOutputFormat(%d)", of);
221    if (of < OUTPUT_FORMAT_DEFAULT || of >= OUTPUT_FORMAT_LIST_END) {
222        jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid output format");
223        return;
224    }
225    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
226    if (mr == NULL) {
227        jniThrowException(env, "java/lang/IllegalStateException", NULL);
228        return;
229    }
230    process_media_recorder_call(env, mr->setOutputFormat(of), "java/lang/RuntimeException", "setOutputFormat failed.");
231}
232
233static void
234android_media_MediaRecorder_setVideoEncoder(JNIEnv *env, jobject thiz, jint ve)
235{
236    ALOGV("setVideoEncoder(%d)", ve);
237    if (ve < VIDEO_ENCODER_DEFAULT || ve >= VIDEO_ENCODER_LIST_END) {
238        jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid video encoder");
239        return;
240    }
241    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
242    if (mr == NULL) {
243        jniThrowException(env, "java/lang/IllegalStateException", NULL);
244        return;
245    }
246    process_media_recorder_call(env, mr->setVideoEncoder(ve), "java/lang/RuntimeException", "setVideoEncoder failed.");
247}
248
249static void
250android_media_MediaRecorder_setAudioEncoder(JNIEnv *env, jobject thiz, jint ae)
251{
252    ALOGV("setAudioEncoder(%d)", ae);
253    if (ae < AUDIO_ENCODER_DEFAULT || ae >= AUDIO_ENCODER_LIST_END) {
254        jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid audio encoder");
255        return;
256    }
257    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
258    if (mr == NULL) {
259        jniThrowException(env, "java/lang/IllegalStateException", NULL);
260        return;
261    }
262    process_media_recorder_call(env, mr->setAudioEncoder(ae), "java/lang/RuntimeException", "setAudioEncoder failed.");
263}
264
265static void
266android_media_MediaRecorder_setParameter(JNIEnv *env, jobject thiz, jstring params)
267{
268    ALOGV("setParameter()");
269    if (params == NULL)
270    {
271        ALOGE("Invalid or empty params string.  This parameter will be ignored.");
272        return;
273    }
274
275    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
276    if (mr == NULL) {
277        jniThrowException(env, "java/lang/IllegalStateException", NULL);
278        return;
279    }
280
281    const char* params8 = env->GetStringUTFChars(params, NULL);
282    if (params8 == NULL)
283    {
284        ALOGE("Failed to covert jstring to String8.  This parameter will be ignored.");
285        return;
286    }
287
288    process_media_recorder_call(env, mr->setParameters(String8(params8)), "java/lang/RuntimeException", "setParameter failed.");
289    env->ReleaseStringUTFChars(params,params8);
290}
291
292static void
293android_media_MediaRecorder_setOutputFileFD(JNIEnv *env, jobject thiz, jobject fileDescriptor, jlong offset, jlong length)
294{
295    ALOGV("setOutputFile");
296    if (fileDescriptor == NULL) {
297        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
298        return;
299    }
300    int fd = jniGetFDFromFileDescriptor(env, fileDescriptor);
301    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
302    if (mr == NULL) {
303        jniThrowException(env, "java/lang/IllegalStateException", NULL);
304        return;
305    }
306    status_t opStatus = mr->setOutputFile(fd, offset, length);
307    process_media_recorder_call(env, opStatus, "java/io/IOException", "setOutputFile failed.");
308}
309
310static void
311android_media_MediaRecorder_setVideoSize(JNIEnv *env, jobject thiz, jint width, jint height)
312{
313    ALOGV("setVideoSize(%d, %d)", width, height);
314    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
315    if (mr == NULL) {
316        jniThrowException(env, "java/lang/IllegalStateException", NULL);
317        return;
318    }
319
320    if (width <= 0 || height <= 0) {
321        jniThrowException(env, "java/lang/IllegalArgumentException", "invalid video size");
322        return;
323    }
324    process_media_recorder_call(env, mr->setVideoSize(width, height), "java/lang/RuntimeException", "setVideoSize failed.");
325}
326
327static void
328android_media_MediaRecorder_setVideoFrameRate(JNIEnv *env, jobject thiz, jint rate)
329{
330    ALOGV("setVideoFrameRate(%d)", rate);
331    if (rate <= 0) {
332        jniThrowException(env, "java/lang/IllegalArgumentException", "invalid frame rate");
333        return;
334    }
335    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
336    if (mr == NULL) {
337        jniThrowException(env, "java/lang/IllegalStateException", NULL);
338        return;
339    }
340    process_media_recorder_call(env, mr->setVideoFrameRate(rate), "java/lang/RuntimeException", "setVideoFrameRate failed.");
341}
342
343static void
344android_media_MediaRecorder_setMaxDuration(JNIEnv *env, jobject thiz, jint max_duration_ms)
345{
346    ALOGV("setMaxDuration(%d)", max_duration_ms);
347    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
348    if (mr == NULL) {
349        jniThrowException(env, "java/lang/IllegalStateException", NULL);
350        return;
351    }
352
353    char params[64];
354    sprintf(params, "max-duration=%d", max_duration_ms);
355
356    process_media_recorder_call(env, mr->setParameters(String8(params)), "java/lang/RuntimeException", "setMaxDuration failed.");
357}
358
359static void
360android_media_MediaRecorder_setMaxFileSize(
361        JNIEnv *env, jobject thiz, jlong max_filesize_bytes)
362{
363    ALOGV("setMaxFileSize(%lld)", (long long)max_filesize_bytes);
364    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
365    if (mr == NULL) {
366        jniThrowException(env, "java/lang/IllegalStateException", NULL);
367        return;
368    }
369
370    char params[64];
371    sprintf(params, "max-filesize=%" PRId64, max_filesize_bytes);
372
373    process_media_recorder_call(env, mr->setParameters(String8(params)), "java/lang/RuntimeException", "setMaxFileSize failed.");
374}
375
376static void
377android_media_MediaRecorder_prepare(JNIEnv *env, jobject thiz)
378{
379    ALOGV("prepare");
380    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
381    if (mr == NULL) {
382        jniThrowException(env, "java/lang/IllegalStateException", NULL);
383        return;
384    }
385
386    jobject surface = env->GetObjectField(thiz, fields.surface);
387    if (surface != NULL) {
388        const sp<Surface> native_surface = get_surface(env, surface);
389
390        // The application may misbehave and
391        // the preview surface becomes unavailable
392        if (native_surface.get() == 0) {
393            ALOGE("Application lost the surface");
394            jniThrowException(env, "java/io/IOException", "invalid preview surface");
395            return;
396        }
397
398        ALOGI("prepare: surface=%p", native_surface.get());
399        if (process_media_recorder_call(env, mr->setPreviewSurface(native_surface->getIGraphicBufferProducer()), "java/lang/RuntimeException", "setPreviewSurface failed.")) {
400            return;
401        }
402    }
403    process_media_recorder_call(env, mr->prepare(), "java/io/IOException", "prepare failed.");
404}
405
406static jint
407android_media_MediaRecorder_native_getMaxAmplitude(JNIEnv *env, jobject thiz)
408{
409    ALOGV("getMaxAmplitude");
410    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
411    if (mr == NULL) {
412        jniThrowException(env, "java/lang/IllegalStateException", NULL);
413        return 0;
414    }
415    int result = 0;
416    process_media_recorder_call(env, mr->getMaxAmplitude(&result), "java/lang/RuntimeException", "getMaxAmplitude failed.");
417    return (jint) result;
418}
419
420static jobject
421android_media_MediaRecorder_getSurface(JNIEnv *env, jobject thiz)
422{
423    ALOGV("getSurface");
424    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
425    if (mr == NULL) {
426        jniThrowException(env, "java/lang/IllegalStateException", NULL);
427        return NULL;
428    }
429
430    sp<IGraphicBufferProducer> bufferProducer = mr->querySurfaceMediaSourceFromMediaServer();
431    if (bufferProducer == NULL) {
432        jniThrowException(
433                env,
434                "java/lang/IllegalStateException",
435                "failed to get surface");
436        return NULL;
437    }
438
439    // Wrap the IGBP in a Java-language Surface.
440    return android_view_Surface_createFromIGraphicBufferProducer(env,
441            bufferProducer);
442}
443
444static void
445android_media_MediaRecorder_start(JNIEnv *env, jobject thiz)
446{
447    ALOGV("start");
448    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
449    if (mr == NULL) {
450        jniThrowException(env, "java/lang/IllegalStateException", NULL);
451        return;
452    }
453    process_media_recorder_call(env, mr->start(), "java/lang/RuntimeException", "start failed.");
454}
455
456static void
457android_media_MediaRecorder_stop(JNIEnv *env, jobject thiz)
458{
459    ALOGV("stop");
460    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
461    if (mr == NULL) {
462        jniThrowException(env, "java/lang/IllegalStateException", NULL);
463        return;
464    }
465    process_media_recorder_call(env, mr->stop(), "java/lang/RuntimeException", "stop failed.");
466}
467
468static void
469android_media_MediaRecorder_pause(JNIEnv *env, jobject thiz)
470{
471    ALOGV("pause");
472    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
473    if (mr == NULL) {
474        jniThrowException(env, "java/lang/IllegalStateException", NULL);
475        return;
476    }
477    process_media_recorder_call(env, mr->pause(), "java/lang/RuntimeException", "pause failed.");
478}
479
480static void
481android_media_MediaRecorder_resume(JNIEnv *env, jobject thiz)
482{
483    ALOGV("resume");
484    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
485    if (mr == NULL) {
486        jniThrowException(env, "java/lang/IllegalStateException", NULL);
487        return;
488    }
489    process_media_recorder_call(env, mr->resume(), "java/lang/RuntimeException", "resume failed.");
490}
491
492static void
493android_media_MediaRecorder_native_reset(JNIEnv *env, jobject thiz)
494{
495    ALOGV("native_reset");
496    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
497    if (mr == NULL) {
498        jniThrowException(env, "java/lang/IllegalStateException", NULL);
499        return;
500    }
501    process_media_recorder_call(env, mr->reset(), "java/lang/RuntimeException", "native_reset failed.");
502}
503
504static void
505android_media_MediaRecorder_release(JNIEnv *env, jobject thiz)
506{
507    ALOGV("release");
508    sp<MediaRecorder> mr = setMediaRecorder(env, thiz, 0);
509    if (mr != NULL) {
510        mr->setListener(NULL);
511        mr->release();
512    }
513}
514
515// This function gets some field IDs, which in turn causes class initialization.
516// It is called from a static block in MediaRecorder, which won't run until the
517// first time an instance of this class is used.
518static void
519android_media_MediaRecorder_native_init(JNIEnv *env)
520{
521    jclass clazz;
522
523    clazz = env->FindClass("android/media/MediaRecorder");
524    if (clazz == NULL) {
525        return;
526    }
527
528    fields.context = env->GetFieldID(clazz, "mNativeContext", "J");
529    if (fields.context == NULL) {
530        return;
531    }
532
533    fields.surface = env->GetFieldID(clazz, "mSurface", "Landroid/view/Surface;");
534    if (fields.surface == NULL) {
535        return;
536    }
537
538    jclass surface = env->FindClass("android/view/Surface");
539    if (surface == NULL) {
540        return;
541    }
542
543    fields.post_event = env->GetStaticMethodID(clazz, "postEventFromNative",
544                                               "(Ljava/lang/Object;IIILjava/lang/Object;)V");
545    if (fields.post_event == NULL) {
546        return;
547    }
548}
549
550
551static void
552android_media_MediaRecorder_native_setup(JNIEnv *env, jobject thiz, jobject weak_this,
553                                         jstring packageName, jstring opPackageName)
554{
555    ALOGV("setup");
556
557    ScopedUtfChars opPackageNameStr(env, opPackageName);
558
559    sp<MediaRecorder> mr = new MediaRecorder(String16(opPackageNameStr.c_str()));
560    if (mr == NULL) {
561        jniThrowException(env, "java/lang/RuntimeException", "Out of memory");
562        return;
563    }
564    if (mr->initCheck() != NO_ERROR) {
565        jniThrowException(env, "java/lang/RuntimeException", "Unable to initialize media recorder");
566        return;
567    }
568
569    // create new listener and give it to MediaRecorder
570    sp<JNIMediaRecorderListener> listener = new JNIMediaRecorderListener(env, thiz, weak_this);
571    mr->setListener(listener);
572
573    // Convert client name jstring to String16
574    const char16_t *rawClientName = reinterpret_cast<const char16_t*>(
575        env->GetStringChars(packageName, NULL));
576    jsize rawClientNameLen = env->GetStringLength(packageName);
577    String16 clientName(rawClientName, rawClientNameLen);
578    env->ReleaseStringChars(packageName,
579                            reinterpret_cast<const jchar*>(rawClientName));
580
581    // pass client package name for permissions tracking
582    mr->setClientName(clientName);
583
584    setMediaRecorder(env, thiz, mr);
585}
586
587static void
588android_media_MediaRecorder_native_finalize(JNIEnv *env, jobject thiz)
589{
590    ALOGV("finalize");
591    android_media_MediaRecorder_release(env, thiz);
592}
593
594void android_media_MediaRecorder_setInputSurface(
595        JNIEnv* env, jobject thiz, jobject object) {
596    ALOGV("android_media_MediaRecorder_setInputSurface");
597
598    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
599    if (mr == NULL) {
600        jniThrowException(env, "java/lang/IllegalStateException", NULL);
601        return;
602    }
603
604    sp<PersistentSurface> persistentSurface = get_persistentSurface(env, object);
605
606    process_media_recorder_call(env, mr->setInputSurface(persistentSurface),
607            "java/lang/IllegalArgumentException", "native_setInputSurface failed.");
608}
609
610// ----------------------------------------------------------------------------
611
612static const JNINativeMethod gMethods[] = {
613    {"setCamera",            "(Landroid/hardware/Camera;)V",    (void *)android_media_MediaRecorder_setCamera},
614    {"setVideoSource",       "(I)V",                            (void *)android_media_MediaRecorder_setVideoSource},
615    {"setAudioSource",       "(I)V",                            (void *)android_media_MediaRecorder_setAudioSource},
616    {"setOutputFormat",      "(I)V",                            (void *)android_media_MediaRecorder_setOutputFormat},
617    {"setVideoEncoder",      "(I)V",                            (void *)android_media_MediaRecorder_setVideoEncoder},
618    {"setAudioEncoder",      "(I)V",                            (void *)android_media_MediaRecorder_setAudioEncoder},
619    {"setParameter",         "(Ljava/lang/String;)V",           (void *)android_media_MediaRecorder_setParameter},
620    {"_setOutputFile",       "(Ljava/io/FileDescriptor;JJ)V",   (void *)android_media_MediaRecorder_setOutputFileFD},
621    {"setVideoSize",         "(II)V",                           (void *)android_media_MediaRecorder_setVideoSize},
622    {"setVideoFrameRate",    "(I)V",                            (void *)android_media_MediaRecorder_setVideoFrameRate},
623    {"setMaxDuration",       "(I)V",                            (void *)android_media_MediaRecorder_setMaxDuration},
624    {"setMaxFileSize",       "(J)V",                            (void *)android_media_MediaRecorder_setMaxFileSize},
625    {"_prepare",             "()V",                             (void *)android_media_MediaRecorder_prepare},
626    {"getSurface",           "()Landroid/view/Surface;",        (void *)android_media_MediaRecorder_getSurface},
627    {"getMaxAmplitude",      "()I",                             (void *)android_media_MediaRecorder_native_getMaxAmplitude},
628    {"start",                "()V",                             (void *)android_media_MediaRecorder_start},
629    {"stop",                 "()V",                             (void *)android_media_MediaRecorder_stop},
630    {"pause",                "()V",                             (void *)android_media_MediaRecorder_pause},
631    {"resume",               "()V",                             (void *)android_media_MediaRecorder_resume},
632    {"native_reset",         "()V",                             (void *)android_media_MediaRecorder_native_reset},
633    {"release",              "()V",                             (void *)android_media_MediaRecorder_release},
634    {"native_init",          "()V",                             (void *)android_media_MediaRecorder_native_init},
635    {"native_setup",         "(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/String;)V",
636                                                                (void *)android_media_MediaRecorder_native_setup},
637    {"native_finalize",      "()V",                             (void *)android_media_MediaRecorder_native_finalize},
638    {"native_setInputSurface", "(Landroid/view/Surface;)V", (void *)android_media_MediaRecorder_setInputSurface },
639};
640
641// This function only registers the native methods, and is called from
642// JNI_OnLoad in android_media_MediaPlayer.cpp
643int register_android_media_MediaRecorder(JNIEnv *env)
644{
645    return AndroidRuntime::registerNativeMethods(env,
646                "android/media/MediaRecorder", gMethods, NELEM(gMethods));
647}
648