android_media_MediaRecorder.cpp revision 6698749dd4d4d6513b26aa9071af290b956b68a7
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/ICameraService.h> 30#include <camera/Camera.h> 31#include <media/mediarecorder.h> 32#include <utils/threads.h> 33 34#include "jni.h" 35#include "JNIHelp.h" 36#include "android_runtime/AndroidRuntime.h" 37 38#include <system/audio.h> 39#include <android_runtime/android_view_Surface.h> 40 41// ---------------------------------------------------------------------------- 42 43using namespace android; 44 45// ---------------------------------------------------------------------------- 46 47// helper function to extract a native Camera object from a Camera Java object 48extern sp<Camera> get_native_camera(JNIEnv *env, jobject thiz, struct JNICameraContext** context); 49 50struct fields_t { 51 jfieldID context; 52 jfieldID surface; 53 54 jmethodID post_event; 55}; 56static fields_t fields; 57 58static Mutex sLock; 59 60// ---------------------------------------------------------------------------- 61// ref-counted object for callbacks 62class JNIMediaRecorderListener: public MediaRecorderListener 63{ 64public: 65 JNIMediaRecorderListener(JNIEnv* env, jobject thiz, jobject weak_thiz); 66 ~JNIMediaRecorderListener(); 67 void notify(int msg, int ext1, int ext2); 68private: 69 JNIMediaRecorderListener(); 70 jclass mClass; // Reference to MediaRecorder class 71 jobject mObject; // Weak ref to MediaRecorder Java object to call on 72}; 73 74JNIMediaRecorderListener::JNIMediaRecorderListener(JNIEnv* env, jobject thiz, jobject weak_thiz) 75{ 76 77 // Hold onto the MediaRecorder class for use in calling the static method 78 // that posts events to the application thread. 79 jclass clazz = env->GetObjectClass(thiz); 80 if (clazz == NULL) { 81 ALOGE("Can't find android/media/MediaRecorder"); 82 jniThrowException(env, "java/lang/Exception", NULL); 83 return; 84 } 85 mClass = (jclass)env->NewGlobalRef(clazz); 86 87 // We use a weak reference so the MediaRecorder object can be garbage collected. 88 // The reference is only used as a proxy for callbacks. 89 mObject = env->NewGlobalRef(weak_thiz); 90} 91 92JNIMediaRecorderListener::~JNIMediaRecorderListener() 93{ 94 // remove global references 95 JNIEnv *env = AndroidRuntime::getJNIEnv(); 96 env->DeleteGlobalRef(mObject); 97 env->DeleteGlobalRef(mClass); 98} 99 100void JNIMediaRecorderListener::notify(int msg, int ext1, int ext2) 101{ 102 ALOGV("JNIMediaRecorderListener::notify"); 103 104 JNIEnv *env = AndroidRuntime::getJNIEnv(); 105 env->CallStaticVoidMethod(mClass, fields.post_event, mObject, msg, ext1, ext2, 0); 106} 107 108// ---------------------------------------------------------------------------- 109 110static sp<Surface> get_surface(JNIEnv* env, jobject clazz) 111{ 112 ALOGV("get_surface"); 113 return android_view_Surface_getSurface(env, clazz); 114} 115 116// Returns true if it throws an exception. 117static bool process_media_recorder_call(JNIEnv *env, status_t opStatus, const char* exception, const char* message) 118{ 119 ALOGV("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 130static sp<MediaRecorder> getMediaRecorder(JNIEnv* env, jobject thiz) 131{ 132 Mutex::Autolock l(sLock); 133 MediaRecorder* const p = (MediaRecorder*)env->GetLongField(thiz, fields.context); 134 return sp<MediaRecorder>(p); 135} 136 137static sp<MediaRecorder> setMediaRecorder(JNIEnv* env, jobject thiz, const sp<MediaRecorder>& recorder) 138{ 139 Mutex::Autolock l(sLock); 140 sp<MediaRecorder> old = (MediaRecorder*)env->GetLongField(thiz, fields.context); 141 if (recorder.get()) { 142 recorder->incStrong(thiz); 143 } 144 if (old != 0) { 145 old->decStrong(thiz); 146 } 147 env->SetLongField(thiz, fields.context, (jlong)recorder.get()); 148 return old; 149} 150 151 152static 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 if (c == NULL) { 161 // get_native_camera will throw an exception in this case 162 return; 163 } 164 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 165 process_media_recorder_call(env, mr->setCamera(c->remote(), c->getRecordingProxy()), 166 "java/lang/RuntimeException", "setCamera failed."); 167} 168 169static void 170android_media_MediaRecorder_setVideoSource(JNIEnv *env, jobject thiz, jint vs) 171{ 172 ALOGV("setVideoSource(%d)", vs); 173 if (vs < VIDEO_SOURCE_DEFAULT || vs >= VIDEO_SOURCE_LIST_END) { 174 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid video source"); 175 return; 176 } 177 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 178 process_media_recorder_call(env, mr->setVideoSource(vs), "java/lang/RuntimeException", "setVideoSource failed."); 179} 180 181static void 182android_media_MediaRecorder_setAudioSource(JNIEnv *env, jobject thiz, jint as) 183{ 184 ALOGV("setAudioSource(%d)", as); 185 if (as < AUDIO_SOURCE_DEFAULT || as >= AUDIO_SOURCE_CNT) { 186 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid audio source"); 187 return; 188 } 189 190 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 191 process_media_recorder_call(env, mr->setAudioSource(as), "java/lang/RuntimeException", "setAudioSource failed."); 192} 193 194static void 195android_media_MediaRecorder_setOutputFormat(JNIEnv *env, jobject thiz, jint of) 196{ 197 ALOGV("setOutputFormat(%d)", of); 198 if (of < OUTPUT_FORMAT_DEFAULT || of >= OUTPUT_FORMAT_LIST_END) { 199 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid output format"); 200 return; 201 } 202 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 203 process_media_recorder_call(env, mr->setOutputFormat(of), "java/lang/RuntimeException", "setOutputFormat failed."); 204} 205 206static void 207android_media_MediaRecorder_setVideoEncoder(JNIEnv *env, jobject thiz, jint ve) 208{ 209 ALOGV("setVideoEncoder(%d)", ve); 210 if (ve < VIDEO_ENCODER_DEFAULT || ve >= VIDEO_ENCODER_LIST_END) { 211 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid video encoder"); 212 return; 213 } 214 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 215 process_media_recorder_call(env, mr->setVideoEncoder(ve), "java/lang/RuntimeException", "setVideoEncoder failed."); 216} 217 218static void 219android_media_MediaRecorder_setAudioEncoder(JNIEnv *env, jobject thiz, jint ae) 220{ 221 ALOGV("setAudioEncoder(%d)", ae); 222 if (ae < AUDIO_ENCODER_DEFAULT || ae >= AUDIO_ENCODER_LIST_END) { 223 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid audio encoder"); 224 return; 225 } 226 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 227 process_media_recorder_call(env, mr->setAudioEncoder(ae), "java/lang/RuntimeException", "setAudioEncoder failed."); 228} 229 230static void 231android_media_MediaRecorder_setParameter(JNIEnv *env, jobject thiz, jstring params) 232{ 233 ALOGV("setParameter()"); 234 if (params == NULL) 235 { 236 ALOGE("Invalid or empty params string. This parameter will be ignored."); 237 return; 238 } 239 240 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 241 242 const char* params8 = env->GetStringUTFChars(params, NULL); 243 if (params8 == NULL) 244 { 245 ALOGE("Failed to covert jstring to String8. This parameter will be ignored."); 246 return; 247 } 248 249 process_media_recorder_call(env, mr->setParameters(String8(params8)), "java/lang/RuntimeException", "setParameter failed."); 250 env->ReleaseStringUTFChars(params,params8); 251} 252 253static void 254android_media_MediaRecorder_setOutputFileFD(JNIEnv *env, jobject thiz, jobject fileDescriptor, jlong offset, jlong length) 255{ 256 ALOGV("setOutputFile"); 257 if (fileDescriptor == NULL) { 258 jniThrowException(env, "java/lang/IllegalArgumentException", NULL); 259 return; 260 } 261 int fd = jniGetFDFromFileDescriptor(env, fileDescriptor); 262 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 263 status_t opStatus = mr->setOutputFile(fd, offset, length); 264 process_media_recorder_call(env, opStatus, "java/io/IOException", "setOutputFile failed."); 265} 266 267static void 268android_media_MediaRecorder_setVideoSize(JNIEnv *env, jobject thiz, jint width, jint height) 269{ 270 ALOGV("setVideoSize(%d, %d)", width, height); 271 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 272 273 if (width <= 0 || height <= 0) { 274 jniThrowException(env, "java/lang/IllegalArgumentException", "invalid video size"); 275 return; 276 } 277 process_media_recorder_call(env, mr->setVideoSize(width, height), "java/lang/RuntimeException", "setVideoSize failed."); 278} 279 280static void 281android_media_MediaRecorder_setVideoFrameRate(JNIEnv *env, jobject thiz, jint rate) 282{ 283 ALOGV("setVideoFrameRate(%d)", rate); 284 if (rate <= 0) { 285 jniThrowException(env, "java/lang/IllegalArgumentException", "invalid frame rate"); 286 return; 287 } 288 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 289 process_media_recorder_call(env, mr->setVideoFrameRate(rate), "java/lang/RuntimeException", "setVideoFrameRate failed."); 290} 291 292static void 293android_media_MediaRecorder_setMaxDuration(JNIEnv *env, jobject thiz, jint max_duration_ms) 294{ 295 ALOGV("setMaxDuration(%d)", max_duration_ms); 296 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 297 298 char params[64]; 299 sprintf(params, "max-duration=%d", max_duration_ms); 300 301 process_media_recorder_call(env, mr->setParameters(String8(params)), "java/lang/RuntimeException", "setMaxDuration failed."); 302} 303 304static void 305android_media_MediaRecorder_setMaxFileSize( 306 JNIEnv *env, jobject thiz, jlong max_filesize_bytes) 307{ 308 ALOGV("setMaxFileSize(%lld)", max_filesize_bytes); 309 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 310 311 char params[64]; 312 sprintf(params, "max-filesize=%" PRId64, max_filesize_bytes); 313 314 process_media_recorder_call(env, mr->setParameters(String8(params)), "java/lang/RuntimeException", "setMaxFileSize failed."); 315} 316 317static void 318android_media_MediaRecorder_prepare(JNIEnv *env, jobject thiz) 319{ 320 ALOGV("prepare"); 321 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 322 323 jobject surface = env->GetObjectField(thiz, fields.surface); 324 if (surface != NULL) { 325 const sp<Surface> native_surface = get_surface(env, surface); 326 327 // The application may misbehave and 328 // the preview surface becomes unavailable 329 if (native_surface.get() == 0) { 330 ALOGE("Application lost the surface"); 331 jniThrowException(env, "java/io/IOException", "invalid preview surface"); 332 return; 333 } 334 335 ALOGI("prepare: surface=%p", native_surface.get()); 336 if (process_media_recorder_call(env, mr->setPreviewSurface(native_surface->getIGraphicBufferProducer()), "java/lang/RuntimeException", "setPreviewSurface failed.")) { 337 return; 338 } 339 } 340 process_media_recorder_call(env, mr->prepare(), "java/io/IOException", "prepare failed."); 341} 342 343static jint 344android_media_MediaRecorder_native_getMaxAmplitude(JNIEnv *env, jobject thiz) 345{ 346 ALOGV("getMaxAmplitude"); 347 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 348 int result = 0; 349 process_media_recorder_call(env, mr->getMaxAmplitude(&result), "java/lang/RuntimeException", "getMaxAmplitude failed."); 350 return (jint) result; 351} 352 353static jobject 354android_media_MediaRecorder_getSurface(JNIEnv *env, jobject thiz) 355{ 356 ALOGV("getSurface"); 357 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 358 359 sp<IGraphicBufferProducer> bufferProducer = mr->querySurfaceMediaSourceFromMediaServer(); 360 if (bufferProducer == NULL) { 361 jniThrowException( 362 env, 363 "java/lang/IllegalStateException", 364 "failed to get surface"); 365 return NULL; 366 } 367 368 // Wrap the IGBP in a Java-language Surface. 369 return android_view_Surface_createFromIGraphicBufferProducer(env, 370 bufferProducer); 371} 372 373static void 374android_media_MediaRecorder_start(JNIEnv *env, jobject thiz) 375{ 376 ALOGV("start"); 377 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 378 process_media_recorder_call(env, mr->start(), "java/lang/RuntimeException", "start failed."); 379} 380 381static void 382android_media_MediaRecorder_stop(JNIEnv *env, jobject thiz) 383{ 384 ALOGV("stop"); 385 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 386 process_media_recorder_call(env, mr->stop(), "java/lang/RuntimeException", "stop failed."); 387} 388 389static void 390android_media_MediaRecorder_native_reset(JNIEnv *env, jobject thiz) 391{ 392 ALOGV("native_reset"); 393 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 394 process_media_recorder_call(env, mr->reset(), "java/lang/RuntimeException", "native_reset failed."); 395} 396 397static void 398android_media_MediaRecorder_release(JNIEnv *env, jobject thiz) 399{ 400 ALOGV("release"); 401 sp<MediaRecorder> mr = setMediaRecorder(env, thiz, 0); 402 if (mr != NULL) { 403 mr->setListener(NULL); 404 mr->release(); 405 } 406} 407 408// This function gets some field IDs, which in turn causes class initialization. 409// It is called from a static block in MediaRecorder, which won't run until the 410// first time an instance of this class is used. 411static void 412android_media_MediaRecorder_native_init(JNIEnv *env) 413{ 414 jclass clazz; 415 416 clazz = env->FindClass("android/media/MediaRecorder"); 417 if (clazz == NULL) { 418 return; 419 } 420 421 fields.context = env->GetFieldID(clazz, "mNativeContext", "J"); 422 if (fields.context == NULL) { 423 return; 424 } 425 426 fields.surface = env->GetFieldID(clazz, "mSurface", "Landroid/view/Surface;"); 427 if (fields.surface == NULL) { 428 return; 429 } 430 431 jclass surface = env->FindClass("android/view/Surface"); 432 if (surface == NULL) { 433 return; 434 } 435 436 fields.post_event = env->GetStaticMethodID(clazz, "postEventFromNative", 437 "(Ljava/lang/Object;IIILjava/lang/Object;)V"); 438 if (fields.post_event == NULL) { 439 return; 440 } 441} 442 443 444static void 445android_media_MediaRecorder_native_setup(JNIEnv *env, jobject thiz, jobject weak_this, 446 jstring packageName) 447{ 448 ALOGV("setup"); 449 450 sp<MediaRecorder> mr = new MediaRecorder(); 451 if (mr == NULL) { 452 jniThrowException(env, "java/lang/RuntimeException", "Out of memory"); 453 return; 454 } 455 if (mr->initCheck() != NO_ERROR) { 456 jniThrowException(env, "java/lang/RuntimeException", "Unable to initialize media recorder"); 457 return; 458 } 459 460 // create new listener and give it to MediaRecorder 461 sp<JNIMediaRecorderListener> listener = new JNIMediaRecorderListener(env, thiz, weak_this); 462 mr->setListener(listener); 463 464 // Convert client name jstring to String16 465 const char16_t *rawClientName = reinterpret_cast<const char16_t*>( 466 env->GetStringChars(packageName, NULL)); 467 jsize rawClientNameLen = env->GetStringLength(packageName); 468 String16 clientName(rawClientName, rawClientNameLen); 469 env->ReleaseStringChars(packageName, 470 reinterpret_cast<const jchar*>(rawClientName)); 471 472 // pass client package name for permissions tracking 473 mr->setClientName(clientName); 474 475 setMediaRecorder(env, thiz, mr); 476} 477 478static void 479android_media_MediaRecorder_native_finalize(JNIEnv *env, jobject thiz) 480{ 481 ALOGV("finalize"); 482 android_media_MediaRecorder_release(env, thiz); 483} 484 485// ---------------------------------------------------------------------------- 486 487static JNINativeMethod gMethods[] = { 488 {"setCamera", "(Landroid/hardware/Camera;)V", (void *)android_media_MediaRecorder_setCamera}, 489 {"setVideoSource", "(I)V", (void *)android_media_MediaRecorder_setVideoSource}, 490 {"setAudioSource", "(I)V", (void *)android_media_MediaRecorder_setAudioSource}, 491 {"setOutputFormat", "(I)V", (void *)android_media_MediaRecorder_setOutputFormat}, 492 {"setVideoEncoder", "(I)V", (void *)android_media_MediaRecorder_setVideoEncoder}, 493 {"setAudioEncoder", "(I)V", (void *)android_media_MediaRecorder_setAudioEncoder}, 494 {"setParameter", "(Ljava/lang/String;)V", (void *)android_media_MediaRecorder_setParameter}, 495 {"_setOutputFile", "(Ljava/io/FileDescriptor;JJ)V", (void *)android_media_MediaRecorder_setOutputFileFD}, 496 {"setVideoSize", "(II)V", (void *)android_media_MediaRecorder_setVideoSize}, 497 {"setVideoFrameRate", "(I)V", (void *)android_media_MediaRecorder_setVideoFrameRate}, 498 {"setMaxDuration", "(I)V", (void *)android_media_MediaRecorder_setMaxDuration}, 499 {"setMaxFileSize", "(J)V", (void *)android_media_MediaRecorder_setMaxFileSize}, 500 {"_prepare", "()V", (void *)android_media_MediaRecorder_prepare}, 501 {"getSurface", "()Landroid/view/Surface;", (void *)android_media_MediaRecorder_getSurface}, 502 {"getMaxAmplitude", "()I", (void *)android_media_MediaRecorder_native_getMaxAmplitude}, 503 {"start", "()V", (void *)android_media_MediaRecorder_start}, 504 {"stop", "()V", (void *)android_media_MediaRecorder_stop}, 505 {"native_reset", "()V", (void *)android_media_MediaRecorder_native_reset}, 506 {"release", "()V", (void *)android_media_MediaRecorder_release}, 507 {"native_init", "()V", (void *)android_media_MediaRecorder_native_init}, 508 {"native_setup", "(Ljava/lang/Object;Ljava/lang/String;)V", (void *)android_media_MediaRecorder_native_setup}, 509 {"native_finalize", "()V", (void *)android_media_MediaRecorder_native_finalize}, 510}; 511 512static const char* const kClassPathName = "android/media/MediaRecorder"; 513 514// This function only registers the native methods, and is called from 515// JNI_OnLoad in android_media_MediaPlayer.cpp 516int register_android_media_MediaRecorder(JNIEnv *env) 517{ 518 return AndroidRuntime::registerNativeMethods(env, 519 "android/media/MediaRecorder", gMethods, NELEM(gMethods)); 520} 521