android_media_MediaRecorder.cpp revision 853940331ff2be48ed3e63f459845e5e43d0a131
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 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 165static void 166android_media_MediaRecorder_setVideoSource(JNIEnv *env, jobject thiz, jint vs) 167{ 168 ALOGV("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 177static void 178android_media_MediaRecorder_setAudioSource(JNIEnv *env, jobject thiz, jint as) 179{ 180 ALOGV("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 190static void 191android_media_MediaRecorder_setOutputFormat(JNIEnv *env, jobject thiz, jint of) 192{ 193 ALOGV("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 202static void 203android_media_MediaRecorder_setVideoEncoder(JNIEnv *env, jobject thiz, jint ve) 204{ 205 ALOGV("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 214static void 215android_media_MediaRecorder_setAudioEncoder(JNIEnv *env, jobject thiz, jint ae) 216{ 217 ALOGV("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 226static void 227android_media_MediaRecorder_setParameter(JNIEnv *env, jobject thiz, jstring params) 228{ 229 ALOGV("setParameter()"); 230 if (params == NULL) 231 { 232 ALOGE("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 ALOGE("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 249static void 250android_media_MediaRecorder_setOutputFileFD(JNIEnv *env, jobject thiz, jobject fileDescriptor, jlong offset, jlong length) 251{ 252 ALOGV("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 263static void 264android_media_MediaRecorder_setVideoSize(JNIEnv *env, jobject thiz, jint width, jint height) 265{ 266 ALOGV("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 276static void 277android_media_MediaRecorder_setVideoFrameRate(JNIEnv *env, jobject thiz, jint rate) 278{ 279 ALOGV("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 288static void 289android_media_MediaRecorder_setMaxDuration(JNIEnv *env, jobject thiz, jint max_duration_ms) 290{ 291 ALOGV("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 300static void 301android_media_MediaRecorder_setMaxFileSize( 302 JNIEnv *env, jobject thiz, jlong max_filesize_bytes) 303{ 304 ALOGV("setMaxFileSize(%lld)", max_filesize_bytes); 305 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 306 307 char params[64]; 308 sprintf(params, "max-filesize=%" PRId64, max_filesize_bytes); 309 310 process_media_recorder_call(env, mr->setParameters(String8(params)), "java/lang/RuntimeException", "setMaxFileSize failed."); 311} 312 313static void 314android_media_MediaRecorder_prepare(JNIEnv *env, jobject thiz) 315{ 316 ALOGV("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 ALOGE("Application lost the surface"); 327 jniThrowException(env, "java/io/IOException", "invalid preview surface"); 328 return; 329 } 330 331 ALOGI("prepare: surface=%p", native_surface.get()); 332 if (process_media_recorder_call(env, mr->setPreviewSurface(native_surface->getIGraphicBufferProducer()), "java/lang/RuntimeException", "setPreviewSurface failed.")) { 333 return; 334 } 335 } 336 process_media_recorder_call(env, mr->prepare(), "java/io/IOException", "prepare failed."); 337} 338 339static jint 340android_media_MediaRecorder_native_getMaxAmplitude(JNIEnv *env, jobject thiz) 341{ 342 ALOGV("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 (jint) result; 347} 348 349static void 350android_media_MediaRecorder_start(JNIEnv *env, jobject thiz) 351{ 352 ALOGV("start"); 353 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 354 process_media_recorder_call(env, mr->start(), "java/lang/RuntimeException", "start failed."); 355} 356 357static void 358android_media_MediaRecorder_stop(JNIEnv *env, jobject thiz) 359{ 360 ALOGV("stop"); 361 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 362 process_media_recorder_call(env, mr->stop(), "java/lang/RuntimeException", "stop failed."); 363} 364 365static void 366android_media_MediaRecorder_native_reset(JNIEnv *env, jobject thiz) 367{ 368 ALOGV("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 373static void 374android_media_MediaRecorder_release(JNIEnv *env, jobject thiz) 375{ 376 ALOGV("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. 387static void 388android_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", "J"); 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.post_event = env->GetStaticMethodID(clazz, "postEventFromNative", 413 "(Ljava/lang/Object;IIILjava/lang/Object;)V"); 414 if (fields.post_event == NULL) { 415 return; 416 } 417} 418 419 420static void 421android_media_MediaRecorder_native_setup(JNIEnv *env, jobject thiz, jobject weak_this, 422 jstring packageName) 423{ 424 ALOGV("setup"); 425 426 sp<MediaRecorder> mr = new MediaRecorder(); 427 if (mr == NULL) { 428 jniThrowException(env, "java/lang/RuntimeException", "Out of memory"); 429 return; 430 } 431 if (mr->initCheck() != NO_ERROR) { 432 jniThrowException(env, "java/lang/RuntimeException", "Unable to initialize media recorder"); 433 return; 434 } 435 436 // create new listener and give it to MediaRecorder 437 sp<JNIMediaRecorderListener> listener = new JNIMediaRecorderListener(env, thiz, weak_this); 438 mr->setListener(listener); 439 440 // Convert client name jstring to String16 441 const char16_t *rawClientName = env->GetStringChars(packageName, NULL); 442 jsize rawClientNameLen = env->GetStringLength(packageName); 443 String16 clientName(rawClientName, rawClientNameLen); 444 env->ReleaseStringChars(packageName, rawClientName); 445 446 // pass client package name for permissions tracking 447 mr->setClientName(clientName); 448 449 setMediaRecorder(env, thiz, mr); 450} 451 452static void 453android_media_MediaRecorder_native_finalize(JNIEnv *env, jobject thiz) 454{ 455 ALOGV("finalize"); 456 android_media_MediaRecorder_release(env, thiz); 457} 458 459// ---------------------------------------------------------------------------- 460 461static JNINativeMethod gMethods[] = { 462 {"setCamera", "(Landroid/hardware/Camera;)V", (void *)android_media_MediaRecorder_setCamera}, 463 {"setVideoSource", "(I)V", (void *)android_media_MediaRecorder_setVideoSource}, 464 {"setAudioSource", "(I)V", (void *)android_media_MediaRecorder_setAudioSource}, 465 {"setOutputFormat", "(I)V", (void *)android_media_MediaRecorder_setOutputFormat}, 466 {"setVideoEncoder", "(I)V", (void *)android_media_MediaRecorder_setVideoEncoder}, 467 {"setAudioEncoder", "(I)V", (void *)android_media_MediaRecorder_setAudioEncoder}, 468 {"setParameter", "(Ljava/lang/String;)V", (void *)android_media_MediaRecorder_setParameter}, 469 {"_setOutputFile", "(Ljava/io/FileDescriptor;JJ)V", (void *)android_media_MediaRecorder_setOutputFileFD}, 470 {"setVideoSize", "(II)V", (void *)android_media_MediaRecorder_setVideoSize}, 471 {"setVideoFrameRate", "(I)V", (void *)android_media_MediaRecorder_setVideoFrameRate}, 472 {"setMaxDuration", "(I)V", (void *)android_media_MediaRecorder_setMaxDuration}, 473 {"setMaxFileSize", "(J)V", (void *)android_media_MediaRecorder_setMaxFileSize}, 474 {"_prepare", "()V", (void *)android_media_MediaRecorder_prepare}, 475 {"getMaxAmplitude", "()I", (void *)android_media_MediaRecorder_native_getMaxAmplitude}, 476 {"start", "()V", (void *)android_media_MediaRecorder_start}, 477 {"stop", "()V", (void *)android_media_MediaRecorder_stop}, 478 {"native_reset", "()V", (void *)android_media_MediaRecorder_native_reset}, 479 {"release", "()V", (void *)android_media_MediaRecorder_release}, 480 {"native_init", "()V", (void *)android_media_MediaRecorder_native_init}, 481 {"native_setup", "(Ljava/lang/Object;Ljava/lang/String;)V", (void *)android_media_MediaRecorder_native_setup}, 482 {"native_finalize", "()V", (void *)android_media_MediaRecorder_native_finalize}, 483}; 484 485static const char* const kClassPathName = "android/media/MediaRecorder"; 486 487// This function only registers the native methods, and is called from 488// JNI_OnLoad in android_media_MediaPlayer.cpp 489int register_android_media_MediaRecorder(JNIEnv *env) 490{ 491 return AndroidRuntime::registerNativeMethods(env, 492 "android/media/MediaRecorder", gMethods, NELEM(gMethods)); 493} 494