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 //#define LOG_NDEBUG 0 18 #define LOG_TAG "MediaRecorderJNI" 19 #include <utils/Log.h> 20 21 #include <surfaceflinger/SurfaceComposerClient.h> 22 #include <camera/ICameraService.h> 23 #include <camera/Camera.h> 24 #include <media/mediarecorder.h> 25 #include <stdio.h> 26 #include <assert.h> 27 #include <limits.h> 28 #include <unistd.h> 29 #include <fcntl.h> 30 #include <utils/threads.h> 31 32 #include "jni.h" 33 #include "JNIHelp.h" 34 #include "android_runtime/AndroidRuntime.h" 35 36 #include <system/audio.h> 37 38 // ---------------------------------------------------------------------------- 39 40 using namespace android; 41 42 // ---------------------------------------------------------------------------- 43 44 // helper function to extract a native Camera object from a Camera Java object 45 extern sp<Camera> get_native_camera(JNIEnv *env, jobject thiz, struct JNICameraContext** context); 46 47 struct fields_t { 48 jfieldID context; 49 jfieldID surface; 50 /* actually in android.view.Surface XXX */ 51 jfieldID surface_native; 52 53 jmethodID post_event; 54 }; 55 static fields_t fields; 56 57 static Mutex sLock; 58 59 // ---------------------------------------------------------------------------- 60 // ref-counted object for callbacks 61 class JNIMediaRecorderListener: public MediaRecorderListener 62 { 63 public: 64 JNIMediaRecorderListener(JNIEnv* env, jobject thiz, jobject weak_thiz); 65 ~JNIMediaRecorderListener(); 66 void notify(int msg, int ext1, int ext2); 67 private: 68 JNIMediaRecorderListener(); 69 jclass mClass; // Reference to MediaRecorder class 70 jobject mObject; // Weak ref to MediaRecorder Java object to call on 71 }; 72 73 JNIMediaRecorderListener::JNIMediaRecorderListener(JNIEnv* env, jobject thiz, jobject weak_thiz) 74 { 75 76 // Hold onto the MediaRecorder class for use in calling the static method 77 // that posts events to the application thread. 78 jclass clazz = env->GetObjectClass(thiz); 79 if (clazz == NULL) { 80 LOGE("Can't find android/media/MediaRecorder"); 81 jniThrowException(env, "java/lang/Exception", NULL); 82 return; 83 } 84 mClass = (jclass)env->NewGlobalRef(clazz); 85 86 // We use a weak reference so the MediaRecorder object can be garbage collected. 87 // The reference is only used as a proxy for callbacks. 88 mObject = env->NewGlobalRef(weak_thiz); 89 } 90 91 JNIMediaRecorderListener::~JNIMediaRecorderListener() 92 { 93 // remove global references 94 JNIEnv *env = AndroidRuntime::getJNIEnv(); 95 env->DeleteGlobalRef(mObject); 96 env->DeleteGlobalRef(mClass); 97 } 98 99 void JNIMediaRecorderListener::notify(int msg, int ext1, int ext2) 100 { 101 LOGV("JNIMediaRecorderListener::notify"); 102 103 JNIEnv *env = AndroidRuntime::getJNIEnv(); 104 env->CallStaticVoidMethod(mClass, fields.post_event, mObject, msg, ext1, ext2, 0); 105 } 106 107 // ---------------------------------------------------------------------------- 108 109 static sp<Surface> get_surface(JNIEnv* env, jobject clazz) 110 { 111 LOGV("get_surface"); 112 Surface* const p = (Surface*)env->GetIntField(clazz, fields.surface_native); 113 return sp<Surface>(p); 114 } 115 116 // Returns true if it throws an exception. 117 static bool process_media_recorder_call(JNIEnv *env, status_t opStatus, const char* exception, const char* message) 118 { 119 LOGV("process_media_recorder_call"); 120 if (opStatus == (status_t)INVALID_OPERATION) { 121 jniThrowException(env, "java/lang/IllegalStateException", NULL); 122 return true; 123 } else if (opStatus != (status_t)OK) { 124 jniThrowException(env, exception, message); 125 return true; 126 } 127 return false; 128 } 129 130 static sp<MediaRecorder> getMediaRecorder(JNIEnv* env, jobject thiz) 131 { 132 Mutex::Autolock l(sLock); 133 MediaRecorder* const p = (MediaRecorder*)env->GetIntField(thiz, fields.context); 134 return sp<MediaRecorder>(p); 135 } 136 137 static sp<MediaRecorder> setMediaRecorder(JNIEnv* env, jobject thiz, const sp<MediaRecorder>& recorder) 138 { 139 Mutex::Autolock l(sLock); 140 sp<MediaRecorder> old = (MediaRecorder*)env->GetIntField(thiz, fields.context); 141 if (recorder.get()) { 142 recorder->incStrong(thiz); 143 } 144 if (old != 0) { 145 old->decStrong(thiz); 146 } 147 env->SetIntField(thiz, fields.context, (int)recorder.get()); 148 return old; 149 } 150 151 152 static void android_media_MediaRecorder_setCamera(JNIEnv* env, jobject thiz, jobject camera) 153 { 154 // we should not pass a null camera to get_native_camera() call. 155 if (camera == NULL) { 156 jniThrowNullPointerException(env, "camera object is a NULL pointer"); 157 return; 158 } 159 sp<Camera> c = get_native_camera(env, camera, NULL); 160 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 161 process_media_recorder_call(env, mr->setCamera(c->remote(), c->getRecordingProxy()), 162 "java/lang/RuntimeException", "setCamera failed."); 163 } 164 165 static void 166 android_media_MediaRecorder_setVideoSource(JNIEnv *env, jobject thiz, jint vs) 167 { 168 LOGV("setVideoSource(%d)", vs); 169 if (vs < VIDEO_SOURCE_DEFAULT || vs >= VIDEO_SOURCE_LIST_END) { 170 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid video source"); 171 return; 172 } 173 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 174 process_media_recorder_call(env, mr->setVideoSource(vs), "java/lang/RuntimeException", "setVideoSource failed."); 175 } 176 177 static void 178 android_media_MediaRecorder_setAudioSource(JNIEnv *env, jobject thiz, jint as) 179 { 180 LOGV("setAudioSource(%d)", as); 181 if (as < AUDIO_SOURCE_DEFAULT || as >= AUDIO_SOURCE_CNT) { 182 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid audio source"); 183 return; 184 } 185 186 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 187 process_media_recorder_call(env, mr->setAudioSource(as), "java/lang/RuntimeException", "setAudioSource failed."); 188 } 189 190 static void 191 android_media_MediaRecorder_setOutputFormat(JNIEnv *env, jobject thiz, jint of) 192 { 193 LOGV("setOutputFormat(%d)", of); 194 if (of < OUTPUT_FORMAT_DEFAULT || of >= OUTPUT_FORMAT_LIST_END) { 195 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid output format"); 196 return; 197 } 198 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 199 process_media_recorder_call(env, mr->setOutputFormat(of), "java/lang/RuntimeException", "setOutputFormat failed."); 200 } 201 202 static void 203 android_media_MediaRecorder_setVideoEncoder(JNIEnv *env, jobject thiz, jint ve) 204 { 205 LOGV("setVideoEncoder(%d)", ve); 206 if (ve < VIDEO_ENCODER_DEFAULT || ve >= VIDEO_ENCODER_LIST_END) { 207 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid video encoder"); 208 return; 209 } 210 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 211 process_media_recorder_call(env, mr->setVideoEncoder(ve), "java/lang/RuntimeException", "setVideoEncoder failed."); 212 } 213 214 static void 215 android_media_MediaRecorder_setAudioEncoder(JNIEnv *env, jobject thiz, jint ae) 216 { 217 LOGV("setAudioEncoder(%d)", ae); 218 if (ae < AUDIO_ENCODER_DEFAULT || ae >= AUDIO_ENCODER_LIST_END) { 219 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid audio encoder"); 220 return; 221 } 222 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 223 process_media_recorder_call(env, mr->setAudioEncoder(ae), "java/lang/RuntimeException", "setAudioEncoder failed."); 224 } 225 226 static void 227 android_media_MediaRecorder_setParameter(JNIEnv *env, jobject thiz, jstring params) 228 { 229 LOGV("setParameter()"); 230 if (params == NULL) 231 { 232 LOGE("Invalid or empty params string. This parameter will be ignored."); 233 return; 234 } 235 236 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 237 238 const char* params8 = env->GetStringUTFChars(params, NULL); 239 if (params8 == NULL) 240 { 241 LOGE("Failed to covert jstring to String8. This parameter will be ignored."); 242 return; 243 } 244 245 process_media_recorder_call(env, mr->setParameters(String8(params8)), "java/lang/RuntimeException", "setParameter failed."); 246 env->ReleaseStringUTFChars(params,params8); 247 } 248 249 static void 250 android_media_MediaRecorder_setOutputFileFD(JNIEnv *env, jobject thiz, jobject fileDescriptor, jlong offset, jlong length) 251 { 252 LOGV("setOutputFile"); 253 if (fileDescriptor == NULL) { 254 jniThrowException(env, "java/lang/IllegalArgumentException", NULL); 255 return; 256 } 257 int fd = jniGetFDFromFileDescriptor(env, fileDescriptor); 258 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 259 status_t opStatus = mr->setOutputFile(fd, offset, length); 260 process_media_recorder_call(env, opStatus, "java/io/IOException", "setOutputFile failed."); 261 } 262 263 static void 264 android_media_MediaRecorder_setVideoSize(JNIEnv *env, jobject thiz, jint width, jint height) 265 { 266 LOGV("setVideoSize(%d, %d)", width, height); 267 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 268 269 if (width <= 0 || height <= 0) { 270 jniThrowException(env, "java/lang/IllegalArgumentException", "invalid video size"); 271 return; 272 } 273 process_media_recorder_call(env, mr->setVideoSize(width, height), "java/lang/RuntimeException", "setVideoSize failed."); 274 } 275 276 static void 277 android_media_MediaRecorder_setVideoFrameRate(JNIEnv *env, jobject thiz, jint rate) 278 { 279 LOGV("setVideoFrameRate(%d)", rate); 280 if (rate <= 0) { 281 jniThrowException(env, "java/lang/IllegalArgumentException", "invalid frame rate"); 282 return; 283 } 284 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 285 process_media_recorder_call(env, mr->setVideoFrameRate(rate), "java/lang/RuntimeException", "setVideoFrameRate failed."); 286 } 287 288 static void 289 android_media_MediaRecorder_setMaxDuration(JNIEnv *env, jobject thiz, jint max_duration_ms) 290 { 291 LOGV("setMaxDuration(%d)", max_duration_ms); 292 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 293 294 char params[64]; 295 sprintf(params, "max-duration=%d", max_duration_ms); 296 297 process_media_recorder_call(env, mr->setParameters(String8(params)), "java/lang/RuntimeException", "setMaxDuration failed."); 298 } 299 300 static void 301 android_media_MediaRecorder_setMaxFileSize( 302 JNIEnv *env, jobject thiz, jlong max_filesize_bytes) 303 { 304 LOGV("setMaxFileSize(%lld)", max_filesize_bytes); 305 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 306 307 char params[64]; 308 sprintf(params, "max-filesize=%lld", max_filesize_bytes); 309 310 process_media_recorder_call(env, mr->setParameters(String8(params)), "java/lang/RuntimeException", "setMaxFileSize failed."); 311 } 312 313 static void 314 android_media_MediaRecorder_prepare(JNIEnv *env, jobject thiz) 315 { 316 LOGV("prepare"); 317 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 318 319 jobject surface = env->GetObjectField(thiz, fields.surface); 320 if (surface != NULL) { 321 const sp<Surface> native_surface = get_surface(env, surface); 322 323 // The application may misbehave and 324 // the preview surface becomes unavailable 325 if (native_surface.get() == 0) { 326 LOGE("Application lost the surface"); 327 jniThrowException(env, "java/io/IOException", "invalid preview surface"); 328 return; 329 } 330 331 LOGI("prepare: surface=%p (identity=%d)", native_surface.get(), native_surface->getIdentity()); 332 if (process_media_recorder_call(env, mr->setPreviewSurface(native_surface), "java/lang/RuntimeException", "setPreviewSurface failed.")) { 333 return; 334 } 335 } 336 process_media_recorder_call(env, mr->prepare(), "java/io/IOException", "prepare failed."); 337 } 338 339 static int 340 android_media_MediaRecorder_native_getMaxAmplitude(JNIEnv *env, jobject thiz) 341 { 342 LOGV("getMaxAmplitude"); 343 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 344 int result = 0; 345 process_media_recorder_call(env, mr->getMaxAmplitude(&result), "java/lang/RuntimeException", "getMaxAmplitude failed."); 346 return result; 347 } 348 349 static void 350 android_media_MediaRecorder_start(JNIEnv *env, jobject thiz) 351 { 352 LOGV("start"); 353 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 354 process_media_recorder_call(env, mr->start(), "java/lang/RuntimeException", "start failed."); 355 } 356 357 static void 358 android_media_MediaRecorder_stop(JNIEnv *env, jobject thiz) 359 { 360 LOGV("stop"); 361 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 362 process_media_recorder_call(env, mr->stop(), "java/lang/RuntimeException", "stop failed."); 363 } 364 365 static void 366 android_media_MediaRecorder_native_reset(JNIEnv *env, jobject thiz) 367 { 368 LOGV("native_reset"); 369 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 370 process_media_recorder_call(env, mr->reset(), "java/lang/RuntimeException", "native_reset failed."); 371 } 372 373 static void 374 android_media_MediaRecorder_release(JNIEnv *env, jobject thiz) 375 { 376 LOGV("release"); 377 sp<MediaRecorder> mr = setMediaRecorder(env, thiz, 0); 378 if (mr != NULL) { 379 mr->setListener(NULL); 380 mr->release(); 381 } 382 } 383 384 // This function gets some field IDs, which in turn causes class initialization. 385 // It is called from a static block in MediaRecorder, which won't run until the 386 // first time an instance of this class is used. 387 static void 388 android_media_MediaRecorder_native_init(JNIEnv *env) 389 { 390 jclass clazz; 391 392 clazz = env->FindClass("android/media/MediaRecorder"); 393 if (clazz == NULL) { 394 return; 395 } 396 397 fields.context = env->GetFieldID(clazz, "mNativeContext", "I"); 398 if (fields.context == NULL) { 399 return; 400 } 401 402 fields.surface = env->GetFieldID(clazz, "mSurface", "Landroid/view/Surface;"); 403 if (fields.surface == NULL) { 404 return; 405 } 406 407 jclass surface = env->FindClass("android/view/Surface"); 408 if (surface == NULL) { 409 return; 410 } 411 412 fields.surface_native = env->GetFieldID(surface, ANDROID_VIEW_SURFACE_JNI_ID, "I"); 413 if (fields.surface_native == NULL) { 414 return; 415 } 416 417 fields.post_event = env->GetStaticMethodID(clazz, "postEventFromNative", 418 "(Ljava/lang/Object;IIILjava/lang/Object;)V"); 419 if (fields.post_event == NULL) { 420 return; 421 } 422 } 423 424 425 static void 426 android_media_MediaRecorder_native_setup(JNIEnv *env, jobject thiz, jobject weak_this) 427 { 428 LOGV("setup"); 429 sp<MediaRecorder> mr = new MediaRecorder(); 430 if (mr == NULL) { 431 jniThrowException(env, "java/lang/RuntimeException", "Out of memory"); 432 return; 433 } 434 if (mr->initCheck() != NO_ERROR) { 435 jniThrowException(env, "java/lang/RuntimeException", "Unable to initialize media recorder"); 436 return; 437 } 438 439 // create new listener and give it to MediaRecorder 440 sp<JNIMediaRecorderListener> listener = new JNIMediaRecorderListener(env, thiz, weak_this); 441 mr->setListener(listener); 442 443 setMediaRecorder(env, thiz, mr); 444 } 445 446 static void 447 android_media_MediaRecorder_native_finalize(JNIEnv *env, jobject thiz) 448 { 449 LOGV("finalize"); 450 android_media_MediaRecorder_release(env, thiz); 451 } 452 453 // ---------------------------------------------------------------------------- 454 455 static JNINativeMethod gMethods[] = { 456 {"setCamera", "(Landroid/hardware/Camera;)V", (void *)android_media_MediaRecorder_setCamera}, 457 {"setVideoSource", "(I)V", (void *)android_media_MediaRecorder_setVideoSource}, 458 {"setAudioSource", "(I)V", (void *)android_media_MediaRecorder_setAudioSource}, 459 {"setOutputFormat", "(I)V", (void *)android_media_MediaRecorder_setOutputFormat}, 460 {"setVideoEncoder", "(I)V", (void *)android_media_MediaRecorder_setVideoEncoder}, 461 {"setAudioEncoder", "(I)V", (void *)android_media_MediaRecorder_setAudioEncoder}, 462 {"setParameter", "(Ljava/lang/String;)V", (void *)android_media_MediaRecorder_setParameter}, 463 {"_setOutputFile", "(Ljava/io/FileDescriptor;JJ)V", (void *)android_media_MediaRecorder_setOutputFileFD}, 464 {"setVideoSize", "(II)V", (void *)android_media_MediaRecorder_setVideoSize}, 465 {"setVideoFrameRate", "(I)V", (void *)android_media_MediaRecorder_setVideoFrameRate}, 466 {"setMaxDuration", "(I)V", (void *)android_media_MediaRecorder_setMaxDuration}, 467 {"setMaxFileSize", "(J)V", (void *)android_media_MediaRecorder_setMaxFileSize}, 468 {"_prepare", "()V", (void *)android_media_MediaRecorder_prepare}, 469 {"getMaxAmplitude", "()I", (void *)android_media_MediaRecorder_native_getMaxAmplitude}, 470 {"start", "()V", (void *)android_media_MediaRecorder_start}, 471 {"stop", "()V", (void *)android_media_MediaRecorder_stop}, 472 {"native_reset", "()V", (void *)android_media_MediaRecorder_native_reset}, 473 {"release", "()V", (void *)android_media_MediaRecorder_release}, 474 {"native_init", "()V", (void *)android_media_MediaRecorder_native_init}, 475 {"native_setup", "(Ljava/lang/Object;)V", (void *)android_media_MediaRecorder_native_setup}, 476 {"native_finalize", "()V", (void *)android_media_MediaRecorder_native_finalize}, 477 }; 478 479 static const char* const kClassPathName = "android/media/MediaRecorder"; 480 481 // This function only registers the native methods, and is called from 482 // JNI_OnLoad in android_media_MediaPlayer.cpp 483 int register_android_media_MediaRecorder(JNIEnv *env) 484 { 485 return AndroidRuntime::registerNativeMethods(env, 486 "android/media/MediaRecorder", gMethods, NELEM(gMethods)); 487 } 488
