android_media_MediaRecorder.cpp revision 4bc035a65cac177be9294e69f110497e3b6e34e6
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 // we should not pass a null camera to get_native_camera() call. 154 if (camera == NULL) { 155 jniThrowException(env, "java/lang/NullPointerException", "camera object is a NULL pointer"); 156 return; 157 } 158 sp<Camera> c = get_native_camera(env, camera, NULL); 159 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 160 process_media_recorder_call(env, mr->setCamera(c->remote()), 161 "java/lang/RuntimeException", "setCamera failed."); 162} 163 164static void 165android_media_MediaRecorder_setVideoSource(JNIEnv *env, jobject thiz, jint vs) 166{ 167 LOGV("setVideoSource(%d)", vs); 168 if (vs < VIDEO_SOURCE_DEFAULT || vs > VIDEO_SOURCE_CAMERA) { 169 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid video source"); 170 return; 171 } 172 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 173 process_media_recorder_call(env, mr->setVideoSource(vs), "java/lang/RuntimeException", "setVideoSource failed."); 174} 175 176static void 177android_media_MediaRecorder_setAudioSource(JNIEnv *env, jobject thiz, jint as) 178{ 179 LOGV("setAudioSource(%d)", as); 180 if (as < AUDIO_SOURCE_DEFAULT || as > AUDIO_SOURCE_MAX) { 181 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid audio source"); 182 return; 183 } 184 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 185 process_media_recorder_call(env, mr->setAudioSource(as), "java/lang/RuntimeException", "setAudioSource failed."); 186} 187 188static void 189android_media_MediaRecorder_setOutputFormat(JNIEnv *env, jobject thiz, jint of) 190{ 191 LOGV("setOutputFormat(%d)", of); 192 if (of < OUTPUT_FORMAT_DEFAULT || of >= OUTPUT_FORMAT_LIST_END) { 193 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid output format"); 194 return; 195 } 196 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 197 process_media_recorder_call(env, mr->setOutputFormat(of), "java/lang/RuntimeException", "setOutputFormat failed."); 198} 199 200static void 201android_media_MediaRecorder_setVideoEncoder(JNIEnv *env, jobject thiz, jint ve) 202{ 203 LOGV("setVideoEncoder(%d)", ve); 204 if (ve < VIDEO_ENCODER_DEFAULT || ve > VIDEO_ENCODER_MPEG_4_SP) { 205 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid video encoder"); 206 return; 207 } 208 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 209 process_media_recorder_call(env, mr->setVideoEncoder(ve), "java/lang/RuntimeException", "setVideoEncoder failed."); 210} 211 212static void 213android_media_MediaRecorder_setAudioEncoder(JNIEnv *env, jobject thiz, jint ae) 214{ 215 LOGV("setAudioEncoder(%d)", ae); 216 if (ae < AUDIO_ENCODER_DEFAULT || ae > AUDIO_ENCODER_AMR_NB) { 217 jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid audio encoder"); 218 return; 219 } 220 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 221 process_media_recorder_call(env, mr->setAudioEncoder(ae), "java/lang/RuntimeException", "setAudioEncoder failed."); 222} 223 224static void 225android_media_MediaRecorder_setOutputFileFD(JNIEnv *env, jobject thiz, jobject fileDescriptor, jlong offset, jlong length) 226{ 227 LOGV("setOutputFile"); 228 if (fileDescriptor == NULL) { 229 jniThrowException(env, "java/lang/IllegalArgumentException", NULL); 230 return; 231 } 232 int fd = getParcelFileDescriptorFD(env, fileDescriptor); 233 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 234 status_t opStatus = mr->setOutputFile(fd, offset, length); 235 process_media_recorder_call(env, opStatus, "java/io/IOException", "setOutputFile failed."); 236} 237 238static void 239android_media_MediaRecorder_setVideoSize(JNIEnv *env, jobject thiz, jint width, jint height) 240{ 241 LOGV("setVideoSize(%d, %d)", width, height); 242 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 243 244 if (width <= 0 || height <= 0) { 245 jniThrowException(env, "java/lang/IllegalArgumentException", "invalid video size"); 246 return; 247 } 248 process_media_recorder_call(env, mr->setVideoSize(width, height), "java/lang/RuntimeException", "setVideoSize failed."); 249} 250 251static void 252android_media_MediaRecorder_setVideoFrameRate(JNIEnv *env, jobject thiz, jint rate) 253{ 254 LOGV("setVideoFrameRate(%d)", rate); 255 if (rate <= 0 || rate > MEDIA_RECORDER_MAX_FRAME_RATE) { 256 jniThrowException(env, "java/lang/IllegalArgumentException", "invalid frame rate"); 257 return; 258 } 259 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 260 process_media_recorder_call(env, mr->setVideoFrameRate(rate), "java/lang/RuntimeException", "setVideoFrameRate failed."); 261} 262 263static void 264android_media_MediaRecorder_setMaxDuration(JNIEnv *env, jobject thiz, jint max_duration_ms) 265{ 266 LOGV("setMaxDuration(%d)", max_duration_ms); 267 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 268 269 char params[64]; 270 sprintf(params, "max-duration=%d", max_duration_ms); 271 272 process_media_recorder_call(env, mr->setParameters(String8(params)), "java/lang/RuntimeException", "setMaxDuration failed."); 273} 274 275static void 276android_media_MediaRecorder_setMaxFileSize( 277 JNIEnv *env, jobject thiz, jlong max_filesize_bytes) 278{ 279 LOGV("setMaxFileSize(%lld)", max_filesize_bytes); 280 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 281 282 char params[64]; 283 sprintf(params, "max-filesize=%lld", max_filesize_bytes); 284 285 process_media_recorder_call(env, mr->setParameters(String8(params)), "java/lang/RuntimeException", "setMaxFileSize failed."); 286} 287 288static void 289android_media_MediaRecorder_prepare(JNIEnv *env, jobject thiz) 290{ 291 LOGV("prepare"); 292 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 293 294 jobject surface = env->GetObjectField(thiz, fields.surface); 295 if (surface != NULL) { 296 const sp<Surface>& native_surface = get_surface(env, surface); 297 LOGI("prepare: surface=%p (id=%d)", native_surface.get(), native_surface->ID()); 298 if (process_media_recorder_call(env, mr->setPreviewSurface(native_surface), "java/lang/RuntimeException", "setPreviewSurface failed.")) { 299 return; 300 } 301 } 302 process_media_recorder_call(env, mr->prepare(), "java/io/IOException", "prepare failed."); 303} 304 305static int 306android_media_MediaRecorder_native_getMaxAmplitude(JNIEnv *env, jobject thiz) 307{ 308 LOGV("getMaxAmplitude"); 309 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 310 int result = 0; 311 process_media_recorder_call(env, mr->getMaxAmplitude(&result), "java/lang/RuntimeException", "getMaxAmplitude failed."); 312 return result; 313} 314 315static void 316android_media_MediaRecorder_start(JNIEnv *env, jobject thiz) 317{ 318 LOGV("start"); 319 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 320 process_media_recorder_call(env, mr->start(), "java/lang/RuntimeException", "start failed."); 321} 322 323static void 324android_media_MediaRecorder_stop(JNIEnv *env, jobject thiz) 325{ 326 LOGV("stop"); 327 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 328 process_media_recorder_call(env, mr->stop(), "java/lang/RuntimeException", "stop failed."); 329} 330 331static void 332android_media_MediaRecorder_native_reset(JNIEnv *env, jobject thiz) 333{ 334 LOGV("native_reset"); 335 sp<MediaRecorder> mr = getMediaRecorder(env, thiz); 336 process_media_recorder_call(env, mr->reset(), "java/lang/RuntimeException", "native_reset failed."); 337} 338 339static void 340android_media_MediaRecorder_release(JNIEnv *env, jobject thiz) 341{ 342 LOGV("release"); 343 sp<MediaRecorder> mr = setMediaRecorder(env, thiz, 0); 344 if (mr != NULL) { 345 mr->setListener(NULL); 346 mr->release(); 347 } 348} 349 350static void 351android_media_MediaRecorder_native_setup(JNIEnv *env, jobject thiz, jobject weak_this) 352{ 353 LOGV("setup"); 354 sp<MediaRecorder> mr = new MediaRecorder(); 355 if (mr == NULL) { 356 jniThrowException(env, "java/lang/RuntimeException", "Out of memory"); 357 return; 358 } 359 if (mr->initCheck() != NO_ERROR) { 360 jniThrowException(env, "java/lang/IOException", "Unable to initialize camera"); 361 return; 362 } 363 364 // create new listener and give it to MediaRecorder 365 sp<JNIMediaRecorderListener> listener = new JNIMediaRecorderListener(env, thiz, weak_this); 366 mr->setListener(listener); 367 368 setMediaRecorder(env, thiz, mr); 369} 370 371static void 372android_media_MediaRecorder_native_finalize(JNIEnv *env, jobject thiz) 373{ 374 LOGV("finalize"); 375 android_media_MediaRecorder_release(env, thiz); 376} 377 378// ---------------------------------------------------------------------------- 379 380static JNINativeMethod gMethods[] = { 381 {"setCamera", "(Landroid/hardware/Camera;)V", (void *)android_media_MediaRecorder_setCamera}, 382 {"setVideoSource", "(I)V", (void *)android_media_MediaRecorder_setVideoSource}, 383 {"setAudioSource", "(I)V", (void *)android_media_MediaRecorder_setAudioSource}, 384 {"setOutputFormat", "(I)V", (void *)android_media_MediaRecorder_setOutputFormat}, 385 {"setVideoEncoder", "(I)V", (void *)android_media_MediaRecorder_setVideoEncoder}, 386 {"setAudioEncoder", "(I)V", (void *)android_media_MediaRecorder_setAudioEncoder}, 387 {"_setOutputFile", "(Ljava/io/FileDescriptor;JJ)V", (void *)android_media_MediaRecorder_setOutputFileFD}, 388 {"setVideoSize", "(II)V", (void *)android_media_MediaRecorder_setVideoSize}, 389 {"setVideoFrameRate", "(I)V", (void *)android_media_MediaRecorder_setVideoFrameRate}, 390 {"setMaxDuration", "(I)V", (void *)android_media_MediaRecorder_setMaxDuration}, 391 {"setMaxFileSize", "(J)V", (void *)android_media_MediaRecorder_setMaxFileSize}, 392 {"_prepare", "()V", (void *)android_media_MediaRecorder_prepare}, 393 {"getMaxAmplitude", "()I", (void *)android_media_MediaRecorder_native_getMaxAmplitude}, 394 {"start", "()V", (void *)android_media_MediaRecorder_start}, 395 {"stop", "()V", (void *)android_media_MediaRecorder_stop}, 396 {"native_reset", "()V", (void *)android_media_MediaRecorder_native_reset}, 397 {"release", "()V", (void *)android_media_MediaRecorder_release}, 398 {"native_setup", "(Ljava/lang/Object;)V", (void *)android_media_MediaRecorder_native_setup}, 399 {"native_finalize", "()V", (void *)android_media_MediaRecorder_native_finalize}, 400}; 401 402static const char* const kClassPathName = "android/media/MediaRecorder"; 403 404int register_android_media_MediaRecorder(JNIEnv *env) 405{ 406 jclass clazz; 407 408 clazz = env->FindClass("android/media/MediaRecorder"); 409 if (clazz == NULL) { 410 LOGE("Can't find android/media/MediaRecorder"); 411 return -1; 412 } 413 414 fields.context = env->GetFieldID(clazz, "mNativeContext", "I"); 415 if (fields.context == NULL) { 416 LOGE("Can't find MediaRecorder.mNativeContext"); 417 return -1; 418 } 419 420 fields.surface = env->GetFieldID(clazz, "mSurface", "Landroid/view/Surface;"); 421 if (fields.surface == NULL) { 422 LOGE("Can't find MediaRecorder.mSurface"); 423 return -1; 424 } 425 426 jclass surface = env->FindClass("android/view/Surface"); 427 if (surface == NULL) { 428 LOGE("Can't find android/view/Surface"); 429 return -1; 430 } 431 432 fields.surface_native = env->GetFieldID(surface, "mSurface", "I"); 433 if (fields.surface_native == NULL) { 434 LOGE("Can't find Surface fields"); 435 return -1; 436 } 437 438 fields.post_event = env->GetStaticMethodID(clazz, "postEventFromNative", 439 "(Ljava/lang/Object;IIILjava/lang/Object;)V"); 440 if (fields.post_event == NULL) { 441 LOGE("Can't find MediaRecorder.postEventFromNative"); 442 return -1; 443 } 444 445 return AndroidRuntime::registerNativeMethods(env, 446 "android/media/MediaRecorder", gMethods, NELEM(gMethods)); 447} 448 449 450