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    process_media_recorder_call(env, mr->setCamera(c->remote(), c->getRecordingProxy()),
176            "java/lang/RuntimeException", "setCamera failed.");
177}
178
179static void
180android_media_MediaRecorder_setVideoSource(JNIEnv *env, jobject thiz, jint vs)
181{
182    ALOGV("setVideoSource(%d)", vs);
183    if (vs < VIDEO_SOURCE_DEFAULT || vs >= VIDEO_SOURCE_LIST_END) {
184        jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid video source");
185        return;
186    }
187    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
188    process_media_recorder_call(env, mr->setVideoSource(vs), "java/lang/RuntimeException", "setVideoSource failed.");
189}
190
191static void
192android_media_MediaRecorder_setAudioSource(JNIEnv *env, jobject thiz, jint as)
193{
194    ALOGV("setAudioSource(%d)", as);
195    if (as < AUDIO_SOURCE_DEFAULT ||
196        (as >= AUDIO_SOURCE_CNT && as != AUDIO_SOURCE_FM_TUNER)) {
197        jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid audio source");
198        return;
199    }
200
201    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
202    process_media_recorder_call(env, mr->setAudioSource(as), "java/lang/RuntimeException", "setAudioSource failed.");
203}
204
205static void
206android_media_MediaRecorder_setOutputFormat(JNIEnv *env, jobject thiz, jint of)
207{
208    ALOGV("setOutputFormat(%d)", of);
209    if (of < OUTPUT_FORMAT_DEFAULT || of >= OUTPUT_FORMAT_LIST_END) {
210        jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid output format");
211        return;
212    }
213    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
214    process_media_recorder_call(env, mr->setOutputFormat(of), "java/lang/RuntimeException", "setOutputFormat failed.");
215}
216
217static void
218android_media_MediaRecorder_setVideoEncoder(JNIEnv *env, jobject thiz, jint ve)
219{
220    ALOGV("setVideoEncoder(%d)", ve);
221    if (ve < VIDEO_ENCODER_DEFAULT || ve >= VIDEO_ENCODER_LIST_END) {
222        jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid video encoder");
223        return;
224    }
225    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
226    process_media_recorder_call(env, mr->setVideoEncoder(ve), "java/lang/RuntimeException", "setVideoEncoder failed.");
227}
228
229static void
230android_media_MediaRecorder_setAudioEncoder(JNIEnv *env, jobject thiz, jint ae)
231{
232    ALOGV("setAudioEncoder(%d)", ae);
233    if (ae < AUDIO_ENCODER_DEFAULT || ae >= AUDIO_ENCODER_LIST_END) {
234        jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid audio encoder");
235        return;
236    }
237    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
238    process_media_recorder_call(env, mr->setAudioEncoder(ae), "java/lang/RuntimeException", "setAudioEncoder failed.");
239}
240
241static void
242android_media_MediaRecorder_setParameter(JNIEnv *env, jobject thiz, jstring params)
243{
244    ALOGV("setParameter()");
245    if (params == NULL)
246    {
247        ALOGE("Invalid or empty params string.  This parameter will be ignored.");
248        return;
249    }
250
251    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
252
253    const char* params8 = env->GetStringUTFChars(params, NULL);
254    if (params8 == NULL)
255    {
256        ALOGE("Failed to covert jstring to String8.  This parameter will be ignored.");
257        return;
258    }
259
260    process_media_recorder_call(env, mr->setParameters(String8(params8)), "java/lang/RuntimeException", "setParameter failed.");
261    env->ReleaseStringUTFChars(params,params8);
262}
263
264static void
265android_media_MediaRecorder_setOutputFileFD(JNIEnv *env, jobject thiz, jobject fileDescriptor, jlong offset, jlong length)
266{
267    ALOGV("setOutputFile");
268    if (fileDescriptor == NULL) {
269        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
270        return;
271    }
272    int fd = jniGetFDFromFileDescriptor(env, fileDescriptor);
273    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
274    status_t opStatus = mr->setOutputFile(fd, offset, length);
275    process_media_recorder_call(env, opStatus, "java/io/IOException", "setOutputFile failed.");
276}
277
278static void
279android_media_MediaRecorder_setVideoSize(JNIEnv *env, jobject thiz, jint width, jint height)
280{
281    ALOGV("setVideoSize(%d, %d)", width, height);
282    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
283
284    if (width <= 0 || height <= 0) {
285        jniThrowException(env, "java/lang/IllegalArgumentException", "invalid video size");
286        return;
287    }
288    process_media_recorder_call(env, mr->setVideoSize(width, height), "java/lang/RuntimeException", "setVideoSize failed.");
289}
290
291static void
292android_media_MediaRecorder_setVideoFrameRate(JNIEnv *env, jobject thiz, jint rate)
293{
294    ALOGV("setVideoFrameRate(%d)", rate);
295    if (rate <= 0) {
296        jniThrowException(env, "java/lang/IllegalArgumentException", "invalid frame rate");
297        return;
298    }
299    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
300    process_media_recorder_call(env, mr->setVideoFrameRate(rate), "java/lang/RuntimeException", "setVideoFrameRate failed.");
301}
302
303static void
304android_media_MediaRecorder_setMaxDuration(JNIEnv *env, jobject thiz, jint max_duration_ms)
305{
306    ALOGV("setMaxDuration(%d)", max_duration_ms);
307    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
308
309    char params[64];
310    sprintf(params, "max-duration=%d", max_duration_ms);
311
312    process_media_recorder_call(env, mr->setParameters(String8(params)), "java/lang/RuntimeException", "setMaxDuration failed.");
313}
314
315static void
316android_media_MediaRecorder_setMaxFileSize(
317        JNIEnv *env, jobject thiz, jlong max_filesize_bytes)
318{
319    ALOGV("setMaxFileSize(%lld)", (long long)max_filesize_bytes);
320    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
321
322    char params[64];
323    sprintf(params, "max-filesize=%" PRId64, max_filesize_bytes);
324
325    process_media_recorder_call(env, mr->setParameters(String8(params)), "java/lang/RuntimeException", "setMaxFileSize failed.");
326}
327
328static void
329android_media_MediaRecorder_prepare(JNIEnv *env, jobject thiz)
330{
331    ALOGV("prepare");
332    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
333
334    jobject surface = env->GetObjectField(thiz, fields.surface);
335    if (surface != NULL) {
336        const sp<Surface> native_surface = get_surface(env, surface);
337
338        // The application may misbehave and
339        // the preview surface becomes unavailable
340        if (native_surface.get() == 0) {
341            ALOGE("Application lost the surface");
342            jniThrowException(env, "java/io/IOException", "invalid preview surface");
343            return;
344        }
345
346        ALOGI("prepare: surface=%p", native_surface.get());
347        if (process_media_recorder_call(env, mr->setPreviewSurface(native_surface->getIGraphicBufferProducer()), "java/lang/RuntimeException", "setPreviewSurface failed.")) {
348            return;
349        }
350    }
351    process_media_recorder_call(env, mr->prepare(), "java/io/IOException", "prepare failed.");
352}
353
354static jint
355android_media_MediaRecorder_native_getMaxAmplitude(JNIEnv *env, jobject thiz)
356{
357    ALOGV("getMaxAmplitude");
358    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
359    int result = 0;
360    process_media_recorder_call(env, mr->getMaxAmplitude(&result), "java/lang/RuntimeException", "getMaxAmplitude failed.");
361    return (jint) result;
362}
363
364static jobject
365android_media_MediaRecorder_getSurface(JNIEnv *env, jobject thiz)
366{
367    ALOGV("getSurface");
368    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
369
370    sp<IGraphicBufferProducer> bufferProducer = mr->querySurfaceMediaSourceFromMediaServer();
371    if (bufferProducer == NULL) {
372        jniThrowException(
373                env,
374                "java/lang/IllegalStateException",
375                "failed to get surface");
376        return NULL;
377    }
378
379    // Wrap the IGBP in a Java-language Surface.
380    return android_view_Surface_createFromIGraphicBufferProducer(env,
381            bufferProducer);
382}
383
384static void
385android_media_MediaRecorder_start(JNIEnv *env, jobject thiz)
386{
387    ALOGV("start");
388    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
389    process_media_recorder_call(env, mr->start(), "java/lang/RuntimeException", "start failed.");
390}
391
392static void
393android_media_MediaRecorder_stop(JNIEnv *env, jobject thiz)
394{
395    ALOGV("stop");
396    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
397    process_media_recorder_call(env, mr->stop(), "java/lang/RuntimeException", "stop failed.");
398}
399
400static void
401android_media_MediaRecorder_pause(JNIEnv *env, jobject thiz)
402{
403    ALOGV("pause");
404    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
405    process_media_recorder_call(env, mr->pause(), "java/lang/RuntimeException", "pause failed.");
406}
407
408static void
409android_media_MediaRecorder_resume(JNIEnv *env, jobject thiz)
410{
411    ALOGV("resume");
412    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
413    process_media_recorder_call(env, mr->resume(), "java/lang/RuntimeException", "resume failed.");
414}
415
416static void
417android_media_MediaRecorder_native_reset(JNIEnv *env, jobject thiz)
418{
419    ALOGV("native_reset");
420    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
421    process_media_recorder_call(env, mr->reset(), "java/lang/RuntimeException", "native_reset failed.");
422}
423
424static void
425android_media_MediaRecorder_release(JNIEnv *env, jobject thiz)
426{
427    ALOGV("release");
428    sp<MediaRecorder> mr = setMediaRecorder(env, thiz, 0);
429    if (mr != NULL) {
430        mr->setListener(NULL);
431        mr->release();
432    }
433}
434
435// This function gets some field IDs, which in turn causes class initialization.
436// It is called from a static block in MediaRecorder, which won't run until the
437// first time an instance of this class is used.
438static void
439android_media_MediaRecorder_native_init(JNIEnv *env)
440{
441    jclass clazz;
442
443    clazz = env->FindClass("android/media/MediaRecorder");
444    if (clazz == NULL) {
445        return;
446    }
447
448    fields.context = env->GetFieldID(clazz, "mNativeContext", "J");
449    if (fields.context == NULL) {
450        return;
451    }
452
453    fields.surface = env->GetFieldID(clazz, "mSurface", "Landroid/view/Surface;");
454    if (fields.surface == NULL) {
455        return;
456    }
457
458    jclass surface = env->FindClass("android/view/Surface");
459    if (surface == NULL) {
460        return;
461    }
462
463    fields.post_event = env->GetStaticMethodID(clazz, "postEventFromNative",
464                                               "(Ljava/lang/Object;IIILjava/lang/Object;)V");
465    if (fields.post_event == NULL) {
466        return;
467    }
468}
469
470
471static void
472android_media_MediaRecorder_native_setup(JNIEnv *env, jobject thiz, jobject weak_this,
473                                         jstring packageName, jstring opPackageName)
474{
475    ALOGV("setup");
476
477    ScopedUtfChars opPackageNameStr(env, opPackageName);
478
479    sp<MediaRecorder> mr = new MediaRecorder(String16(opPackageNameStr.c_str()));
480    if (mr == NULL) {
481        jniThrowException(env, "java/lang/RuntimeException", "Out of memory");
482        return;
483    }
484    if (mr->initCheck() != NO_ERROR) {
485        jniThrowException(env, "java/lang/RuntimeException", "Unable to initialize media recorder");
486        return;
487    }
488
489    // create new listener and give it to MediaRecorder
490    sp<JNIMediaRecorderListener> listener = new JNIMediaRecorderListener(env, thiz, weak_this);
491    mr->setListener(listener);
492
493    // Convert client name jstring to String16
494    const char16_t *rawClientName = reinterpret_cast<const char16_t*>(
495        env->GetStringChars(packageName, NULL));
496    jsize rawClientNameLen = env->GetStringLength(packageName);
497    String16 clientName(rawClientName, rawClientNameLen);
498    env->ReleaseStringChars(packageName,
499                            reinterpret_cast<const jchar*>(rawClientName));
500
501    // pass client package name for permissions tracking
502    mr->setClientName(clientName);
503
504    setMediaRecorder(env, thiz, mr);
505}
506
507static void
508android_media_MediaRecorder_native_finalize(JNIEnv *env, jobject thiz)
509{
510    ALOGV("finalize");
511    android_media_MediaRecorder_release(env, thiz);
512}
513
514void android_media_MediaRecorder_setInputSurface(
515        JNIEnv* env, jobject thiz, jobject object) {
516    ALOGV("android_media_MediaRecorder_setInputSurface");
517
518    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
519
520    sp<PersistentSurface> persistentSurface = get_persistentSurface(env, object);
521
522    process_media_recorder_call(env, mr->setInputSurface(persistentSurface),
523            "java/lang/IllegalArgumentException", "native_setInputSurface failed.");
524}
525
526// ----------------------------------------------------------------------------
527
528static const JNINativeMethod gMethods[] = {
529    {"setCamera",            "(Landroid/hardware/Camera;)V",    (void *)android_media_MediaRecorder_setCamera},
530    {"setVideoSource",       "(I)V",                            (void *)android_media_MediaRecorder_setVideoSource},
531    {"setAudioSource",       "(I)V",                            (void *)android_media_MediaRecorder_setAudioSource},
532    {"setOutputFormat",      "(I)V",                            (void *)android_media_MediaRecorder_setOutputFormat},
533    {"setVideoEncoder",      "(I)V",                            (void *)android_media_MediaRecorder_setVideoEncoder},
534    {"setAudioEncoder",      "(I)V",                            (void *)android_media_MediaRecorder_setAudioEncoder},
535    {"setParameter",         "(Ljava/lang/String;)V",           (void *)android_media_MediaRecorder_setParameter},
536    {"_setOutputFile",       "(Ljava/io/FileDescriptor;JJ)V",   (void *)android_media_MediaRecorder_setOutputFileFD},
537    {"setVideoSize",         "(II)V",                           (void *)android_media_MediaRecorder_setVideoSize},
538    {"setVideoFrameRate",    "(I)V",                            (void *)android_media_MediaRecorder_setVideoFrameRate},
539    {"setMaxDuration",       "(I)V",                            (void *)android_media_MediaRecorder_setMaxDuration},
540    {"setMaxFileSize",       "(J)V",                            (void *)android_media_MediaRecorder_setMaxFileSize},
541    {"_prepare",             "()V",                             (void *)android_media_MediaRecorder_prepare},
542    {"getSurface",           "()Landroid/view/Surface;",        (void *)android_media_MediaRecorder_getSurface},
543    {"getMaxAmplitude",      "()I",                             (void *)android_media_MediaRecorder_native_getMaxAmplitude},
544    {"start",                "()V",                             (void *)android_media_MediaRecorder_start},
545    {"stop",                 "()V",                             (void *)android_media_MediaRecorder_stop},
546    {"pause",                "()V",                             (void *)android_media_MediaRecorder_pause},
547    {"resume",               "()V",                             (void *)android_media_MediaRecorder_resume},
548    {"native_reset",         "()V",                             (void *)android_media_MediaRecorder_native_reset},
549    {"release",              "()V",                             (void *)android_media_MediaRecorder_release},
550    {"native_init",          "()V",                             (void *)android_media_MediaRecorder_native_init},
551    {"native_setup",         "(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/String;)V",
552                                                                (void *)android_media_MediaRecorder_native_setup},
553    {"native_finalize",      "()V",                             (void *)android_media_MediaRecorder_native_finalize},
554    {"native_setInputSurface", "(Landroid/view/Surface;)V", (void *)android_media_MediaRecorder_setInputSurface },
555};
556
557// This function only registers the native methods, and is called from
558// JNI_OnLoad in android_media_MediaPlayer.cpp
559int register_android_media_MediaRecorder(JNIEnv *env)
560{
561    return AndroidRuntime::registerNativeMethods(env,
562                "android/media/MediaRecorder", gMethods, NELEM(gMethods));
563}
564