android_media_MediaRecorder.cpp revision 105925376f8d0f6b318c9938c7b83ef7fef094da
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 <ui/SurfaceComposerClient.h> 22#include <ui/ICameraService.h> 23#include <ui/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 37// ---------------------------------------------------------------------------- 38 39using namespace android; 40 41// ---------------------------------------------------------------------------- 42 43// helper function to extract a native Camera object from a Camera Java object 44extern sp<Camera> get_native_camera(JNIEnv *env, jobject thiz, struct camera_context_t** context); 45 46struct fields_t { 47 jfieldID context; 48 jfieldID surface; 49 /* actually in android.view.Surface XXX */ 50 jfieldID surface_native; 51 52 jmethodID post_event; 53}; 54static fields_t fields; 55 56static Mutex sLock; 57 58// ---------------------------------------------------------------------------- 59// ref-counted object for callbacks 60class JNIMediaRecorderListener: public MediaRecorderListener 61{ 62public: 63 JNIMediaRecorderListener(JNIEnv* env, jobject thiz, jobject weak_thiz); 64 ~JNIMediaRecorderListener(); 65 void notify(int msg, int ext1, int ext2); 66private: 67 JNIMediaRecorderListener(); 68 jclass mClass; // Reference to MediaRecorder class 69 jobject mObject; // Weak ref to MediaRecorder Java object to call on 70}; 71 72JNIMediaRecorderListener::JNIMediaRecorderListener(JNIEnv* env, jobject thiz, jobject weak_thiz) 73{ 74 75 // Hold onto the MediaRecorder class for use in calling the static method 76 // that posts events to the application thread. 77 jclass clazz = env->GetObjectClass(thiz); 78 if (clazz == NULL) { 79 LOGE("Can't find android/media/MediaRecorder"); 80 jniThrowException(env, "java/lang/Exception", NULL); 81 return; 82 } 83 mClass = (jclass)env->NewGlobalRef(clazz); 84 85 // We use a weak reference so the MediaRecorder object can be garbage collected. 86 // The reference is only used as a proxy for callbacks. 87 mObject = env->NewGlobalRef(weak_thiz); 88} 89 90JNIMediaRecorderListener::~JNIMediaRecorderListener() 91{ 92 // remove global references 93 JNIEnv *env = AndroidRuntime::getJNIEnv(); 94 env->DeleteGlobalRef(mObject); 95 env->DeleteGlobalRef(mClass); 96} 97 98void JNIMediaRecorderListener::notify(int msg, int ext1, int ext2) 99{ 100 LOGV("JNIMediaRecorderListener::notify"); 101 102 JNIEnv *env = AndroidRuntime::getJNIEnv(); 103 env->CallStaticVoidMethod(mClass, fields.post_event, mObject, msg, ext1, ext2, 0); 104} 105 106// ---------------------------------------------------------------------------- 107 108static sp<Surface> get_surface(JNIEnv* env, jobject clazz) 109{ 110 LOGV("get_surface"); 111 Surface* const p = (Surface*)env->GetIntField(clazz, fields.surface_native); 112 return sp<Surface>(p); 113} 114 115// Returns true if it throws an exception. 116static bool process_media_recorder_call(JNIEnv *env, status_t opStatus, const char* exception, const char* message) 117{ 118 LOGV("process_media_recorder_call"); 119 if (opStatus == (status_t)INVALID_OPERATION) { 120 jniThrowException(env, "java/lang/IllegalStateException", NULL); 121 return true; 122 } else if (opStatus != (status_t)OK) { 123 jniThrowException(env, exception, message); 124 return true; 125 } 126 return false; 127} 128 129static sp<MediaRecorder> getMediaRecorder(JNIEnv* env, jobject thiz) 130{ 131 Mutex::Autolock l(sLock); 132 MediaRecorder* const p = (MediaRecorder*)env->GetIntField(thiz, fields.context); 133 return sp<MediaRecorder>(p); 134} 135 136static sp<MediaRecorder> setMediaRecorder(JNIEnv* env, jobject thiz, const sp<MediaRecorder>& recorder) 137{ 138 Mutex::Autolock l(sLock); 139 sp<MediaRecorder> old = (MediaRecorder*)env->GetIntField(thiz, fields.context); 140 if (recorder.get()) { 141 recorder->incStrong(thiz); 142 } 143 if (old != 0) { 144 old->decStrong(thiz); 145 } 146 env->SetIntField(thiz, fields.context, (int)recorder.get()); 147 return old; 148} 149 150 151static void android_media_MediaRecorder_setCamera(JNIEnv* env, jobject thiz, jobject camera) 152{ 153 sp<Camera> c = get_native_camera(env, camera, NULL); 154 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 155 process_media_recorder_call(env, mr->setCamera(c->remote()), 156 "java/lang/RuntimeException", "setCamera failed."); 157} 158 159static void 160android_media_MediaRecorder_setVideoSource(JNIEnv *env, jobject thiz, jint vs) 161{ 162 LOGV("setVideoSource(%d)", vs); 163 if (vs < VIDEO_SOURCE_DEFAULT || vs > VIDEO_SOURCE_CAMERA) { 164 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid video source"); 165 return; 166 } 167 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 168 process_media_recorder_call(env, mr->setVideoSource(vs), "java/lang/RuntimeException", "setVideoSource failed."); 169} 170 171static void 172android_media_MediaRecorder_setAudioSource(JNIEnv *env, jobject thiz, jint as) 173{ 174 LOGV("setAudioSource(%d)", as); 175 if (as < AUDIO_SOURCE_DEFAULT || as > AUDIO_SOURCE_MIC) { 176 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid audio source"); 177 return; 178 } 179 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 180 process_media_recorder_call(env, mr->setAudioSource(as), "java/lang/RuntimeException", "setAudioSource failed."); 181} 182 183static void 184android_media_MediaRecorder_setOutputFormat(JNIEnv *env, jobject thiz, jint of) 185{ 186 LOGV("setOutputFormat(%d)", of); 187 if (of < OUTPUT_FORMAT_DEFAULT || of >= OUTPUT_FORMAT_LIST_END) { 188 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid output format"); 189 return; 190 } 191 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 192 process_media_recorder_call(env, mr->setOutputFormat(of), "java/lang/RuntimeException", "setOutputFormat failed."); 193} 194 195static void 196android_media_MediaRecorder_setVideoEncoder(JNIEnv *env, jobject thiz, jint ve) 197{ 198 LOGV("setVideoEncoder(%d)", ve); 199 if (ve < VIDEO_ENCODER_DEFAULT || ve > VIDEO_ENCODER_MPEG_4_SP) { 200 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid video encoder"); 201 return; 202 } 203 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 204 process_media_recorder_call(env, mr->setVideoEncoder(ve), "java/lang/RuntimeException", "setVideoEncoder failed."); 205} 206 207static void 208android_media_MediaRecorder_setAudioEncoder(JNIEnv *env, jobject thiz, jint ae) 209{ 210 LOGV("setAudioEncoder(%d)", ae); 211 if (ae < AUDIO_ENCODER_DEFAULT || ae > AUDIO_ENCODER_AMR_NB) { 212 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid audio encoder"); 213 return; 214 } 215 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 216 process_media_recorder_call(env, mr->setAudioEncoder(ae), "java/lang/RuntimeException", "setAudioEncoder failed."); 217} 218 219static void 220android_media_MediaRecorder_setOutputFileFD(JNIEnv *env, jobject thiz, jobject fileDescriptor, jlong offset, jlong length) 221{ 222 LOGV("setOutputFile"); 223 if (fileDescriptor == NULL) { 224 jniThrowException(env, "java/lang/IllegalArgumentException", NULL); 225 return; 226 } 227 int fd = getParcelFileDescriptorFD(env, fileDescriptor); 228 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 229 status_t opStatus = mr->setOutputFile(fd, offset, length); 230 process_media_recorder_call(env, opStatus, "java/io/IOException", "setOutputFile failed."); 231} 232 233static void 234android_media_MediaRecorder_setVideoSize(JNIEnv *env, jobject thiz, jint width, jint height) 235{ 236 LOGV("setVideoSize(%d, %d)", width, height); 237 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 238 239 if (width <= 0 || height <= 0) { 240 jniThrowException(env, "java/lang/IllegalArgumentException", "invalid video size"); 241 return; 242 } 243 process_media_recorder_call(env, mr->setVideoSize(width, height), "java/lang/RuntimeException", "setVideoSize failed."); 244} 245 246static void 247android_media_MediaRecorder_setVideoFrameRate(JNIEnv *env, jobject thiz, jint rate) 248{ 249 LOGV("setVideoFrameRate(%d)", rate); 250 if (rate <= 0 || rate > MEDIA_RECORDER_MAX_FRAME_RATE) { 251 jniThrowException(env, "java/lang/IllegalArgumentException", "invalid frame rate"); 252 return; 253 } 254 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 255 process_media_recorder_call(env, mr->setVideoFrameRate(rate), "java/lang/RuntimeException", "setVideoFrameRate failed."); 256} 257 258static void 259android_media_MediaRecorder_setMaxDuration(JNIEnv *env, jobject thiz, jint max_duration_ms) 260{ 261 LOGV("setMaxDuration(%d)", max_duration_ms); 262 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 263 264 char params[64]; 265 sprintf(params, "max-duration=%d", max_duration_ms); 266 267 process_media_recorder_call(env, mr->setParameters(String8(params)), "java/lang/RuntimeException", "setMaxDuration failed."); 268} 269 270static void 271android_media_MediaRecorder_setMaxFileSize( 272 JNIEnv *env, jobject thiz, jlong max_filesize_bytes) 273{ 274 LOGV("setMaxFileSize(%lld)", max_filesize_bytes); 275 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 276 277 char params[64]; 278 sprintf(params, "max-filesize=%lld", max_filesize_bytes); 279 280 process_media_recorder_call(env, mr->setParameters(String8(params)), "java/lang/RuntimeException", "setMaxFileSize failed."); 281} 282 283static void 284android_media_MediaRecorder_prepare(JNIEnv *env, jobject thiz) 285{ 286 LOGV("prepare"); 287 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 288 289 jobject surface = env->GetObjectField(thiz, fields.surface); 290 if (surface != NULL) { 291 const sp<Surface>& native_surface = get_surface(env, surface); 292 LOGI("prepare: surface=%p (id=%d)", native_surface.get(), native_surface->ID()); 293 if (process_media_recorder_call(env, mr->setPreviewSurface(native_surface), "java/lang/RuntimeException", "setPreviewSurface failed.")) { 294 return; 295 } 296 } 297 process_media_recorder_call(env, mr->prepare(), "java/io/IOException", "prepare failed."); 298} 299 300static int 301android_media_MediaRecorder_native_getMaxAmplitude(JNIEnv *env, jobject thiz) 302{ 303 LOGV("getMaxAmplitude"); 304 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 305 int result = 0; 306 process_media_recorder_call(env, mr->getMaxAmplitude(&result), "java/lang/RuntimeException", "getMaxAmplitude failed."); 307 return result; 308} 309 310static void 311android_media_MediaRecorder_start(JNIEnv *env, jobject thiz) 312{ 313 LOGV("start"); 314 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 315 process_media_recorder_call(env, mr->start(), "java/lang/RuntimeException", "start failed."); 316} 317 318static void 319android_media_MediaRecorder_stop(JNIEnv *env, jobject thiz) 320{ 321 LOGV("stop"); 322 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 323 process_media_recorder_call(env, mr->stop(), "java/lang/RuntimeException", "stop failed."); 324} 325 326static void 327android_media_MediaRecorder_native_reset(JNIEnv *env, jobject thiz) 328{ 329 LOGV("native_reset"); 330 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 331 process_media_recorder_call(env, mr->reset(), "java/lang/RuntimeException", "native_reset failed."); 332} 333 334static void 335android_media_MediaRecorder_release(JNIEnv *env, jobject thiz) 336{ 337 LOGV("release"); 338 sp<MediaRecorder> mr = setMediaRecorder(env, thiz, 0); 339 if (mr != NULL) { 340 mr->setListener(NULL); 341 mr->release(); 342 } 343} 344 345static void 346android_media_MediaRecorder_native_setup(JNIEnv *env, jobject thiz, jobject weak_this) 347{ 348 LOGV("setup"); 349 sp<MediaRecorder> mr = new MediaRecorder(); 350 if (mr == NULL) { 351 jniThrowException(env, "java/lang/RuntimeException", "Out of memory"); 352 return; 353 } 354 if (mr->initCheck() != NO_ERROR) { 355 jniThrowException(env, "java/lang/IOException", "Unable to initialize camera"); 356 return; 357 } 358 359 // create new listener and give it to MediaRecorder 360 sp<JNIMediaRecorderListener> listener = new JNIMediaRecorderListener(env, thiz, weak_this); 361 mr->setListener(listener); 362 363 setMediaRecorder(env, thiz, mr); 364} 365 366static void 367android_media_MediaRecorder_native_finalize(JNIEnv *env, jobject thiz) 368{ 369 LOGV("finalize"); 370 android_media_MediaRecorder_release(env, thiz); 371} 372 373// ---------------------------------------------------------------------------- 374 375static JNINativeMethod gMethods[] = { 376 {"setCamera", "(Landroid/hardware/Camera;)V", (void *)android_media_MediaRecorder_setCamera}, 377 {"setVideoSource", "(I)V", (void *)android_media_MediaRecorder_setVideoSource}, 378 {"setAudioSource", "(I)V", (void *)android_media_MediaRecorder_setAudioSource}, 379 {"setOutputFormat", "(I)V", (void *)android_media_MediaRecorder_setOutputFormat}, 380 {"setVideoEncoder", "(I)V", (void *)android_media_MediaRecorder_setVideoEncoder}, 381 {"setAudioEncoder", "(I)V", (void *)android_media_MediaRecorder_setAudioEncoder}, 382 {"_setOutputFile", "(Ljava/io/FileDescriptor;JJ)V", (void *)android_media_MediaRecorder_setOutputFileFD}, 383 {"setVideoSize", "(II)V", (void *)android_media_MediaRecorder_setVideoSize}, 384 {"setVideoFrameRate", "(I)V", (void *)android_media_MediaRecorder_setVideoFrameRate}, 385 {"setMaxDuration", "(I)V", (void *)android_media_MediaRecorder_setMaxDuration}, 386 {"setMaxFileSize", "(J)V", (void *)android_media_MediaRecorder_setMaxFileSize}, 387 {"_prepare", "()V", (void *)android_media_MediaRecorder_prepare}, 388 {"getMaxAmplitude", "()I", (void *)android_media_MediaRecorder_native_getMaxAmplitude}, 389 {"start", "()V", (void *)android_media_MediaRecorder_start}, 390 {"stop", "()V", (void *)android_media_MediaRecorder_stop}, 391 {"native_reset", "()V", (void *)android_media_MediaRecorder_native_reset}, 392 {"release", "()V", (void *)android_media_MediaRecorder_release}, 393 {"native_setup", "(Ljava/lang/Object;)V", (void *)android_media_MediaRecorder_native_setup}, 394 {"native_finalize", "()V", (void *)android_media_MediaRecorder_native_finalize}, 395}; 396 397static const char* const kClassPathName = "android/media/MediaRecorder"; 398 399int register_android_media_MediaRecorder(JNIEnv *env) 400{ 401 jclass clazz; 402 403 clazz = env->FindClass("android/media/MediaRecorder"); 404 if (clazz == NULL) { 405 LOGE("Can't find android/media/MediaRecorder"); 406 return -1; 407 } 408 409 fields.context = env->GetFieldID(clazz, "mNativeContext", "I"); 410 if (fields.context == NULL) { 411 LOGE("Can't find MediaRecorder.mNativeContext"); 412 return -1; 413 } 414 415 fields.surface = env->GetFieldID(clazz, "mSurface", "Landroid/view/Surface;"); 416 if (fields.surface == NULL) { 417 LOGE("Can't find MediaRecorder.mSurface"); 418 return -1; 419 } 420 421 jclass surface = env->FindClass("android/view/Surface"); 422 if (surface == NULL) { 423 LOGE("Can't find android/view/Surface"); 424 return -1; 425 } 426 427 fields.surface_native = env->GetFieldID(surface, "mSurface", "I"); 428 if (fields.surface_native == NULL) { 429 LOGE("Can't find Surface fields"); 430 return -1; 431 } 432 433 fields.post_event = env->GetStaticMethodID(clazz, "postEventFromNative", 434 "(Ljava/lang/Object;IIILjava/lang/Object;)V"); 435 if (fields.post_event == NULL) { 436 LOGE("Can't find MediaRecorder.postEventFromNative"); 437 return -1; 438 } 439 440 return AndroidRuntime::registerNativeMethods(env, 441 "android/media/MediaRecorder", gMethods, NELEM(gMethods)); 442} 443 444 445