3 ** Copyright 2008, The Android Open Source Project
5 ** Licensed under the Apache License, Version 2.0 (the "License");
6 ** you may not use this file except in compliance with the License.
7 ** You may obtain a copy of the License at
9 ** http://www.apache.org/licenses/LICENSE-2.0
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
18 //#define LOG_NDEBUG 0
19 #define LOG_TAG "MediaMetadataRetrieverJNI"
22 #include <utils/Log.h>
23 #include <utils/threads.h>
24 #include <core/SkBitmap.h>
25 #include <media/mediametadataretriever.h>
26 #include <media/mediascanner.h>
27 #include <private/media/VideoFrame.h>
31 #include "android_runtime/AndroidRuntime.h"
32 #include "android_media_Utils.h"
35 using namespace android;
39 jclass bitmapClazz; // Must be a global ref
40 jfieldID nativeBitmap;
41 jmethodID createBitmapMethod;
42 jmethodID createScaledBitmapMethod;
43 jclass configClazz; // Must be a global ref
44 jmethodID createConfigMethod;
47 static fields_t fields;
49 static const char* const kClassPathName = "android/media/MediaMetadataRetriever";
51 static void process_media_retriever_call(JNIEnv *env, status_t opStatus, const char* exception, const char *message)
53 if (opStatus == (status_t) INVALID_OPERATION) {
54 jniThrowException(env, "java/lang/IllegalStateException", NULL);
55 } else if (opStatus != (status_t) OK) {
56 if (strlen(message) > 230) {
57 // If the message is too long, don't bother displaying the status code.
58 jniThrowException( env, exception, message);
61 // Append the status code to the message.
62 sprintf(msg, "%s: status = 0x%X", message, opStatus);
63 jniThrowException( env, exception, msg);
68 static MediaMetadataRetriever* getRetriever(JNIEnv* env, jobject thiz)
70 // No lock is needed, since it is called internally by other methods that are protected
71 MediaMetadataRetriever* retriever = (MediaMetadataRetriever*) env->GetLongField(thiz, fields.context);
75 static void setRetriever(JNIEnv* env, jobject thiz, MediaMetadataRetriever* retriever)
77 // No lock is needed, since it is called internally by other methods that are protected
78 MediaMetadataRetriever *old = (MediaMetadataRetriever*) env->GetLongField(thiz, fields.context);
79 env->SetLongField(thiz, fields.context, (jlong) retriever);
83 android_media_MediaMetadataRetriever_setDataSourceAndHeaders(
84 JNIEnv *env, jobject thiz, jstring path,
85 jobjectArray keys, jobjectArray values) {
87 ALOGV("setDataSource");
88 MediaMetadataRetriever* retriever = getRetriever(env, thiz);
92 "java/lang/IllegalStateException", "No retriever available");
99 env, "java/lang/IllegalArgumentException", "Null pointer");
104 const char *tmp = env->GetStringUTFChars(path, NULL);
105 if (!tmp) { // OutOfMemoryError exception already thrown
109 String8 pathStr(tmp);
110 env->ReleaseStringUTFChars(path, tmp);
113 // Don't let somebody trick us in to reading some random block of memory
114 if (strncmp("mem://", pathStr.string(), 6) == 0) {
116 env, "java/lang/IllegalArgumentException", "Invalid pathname");
120 // We build a similar KeyedVector out of it.
121 KeyedVector<String8, String8> headersVector;
122 if (!ConvertKeyValueArraysToKeyedVector(
123 env, keys, values, &headersVector)) {
126 process_media_retriever_call(
128 retriever->setDataSource(
129 pathStr.string(), headersVector.size() > 0 ? &headersVector : NULL),
131 "java/lang/RuntimeException",
132 "setDataSource failed");
135 static void android_media_MediaMetadataRetriever_setDataSourceFD(JNIEnv *env, jobject thiz, jobject fileDescriptor, jlong offset, jlong length)
137 ALOGV("setDataSource");
138 MediaMetadataRetriever* retriever = getRetriever(env, thiz);
139 if (retriever == 0) {
140 jniThrowException(env, "java/lang/IllegalStateException", "No retriever available");
143 if (!fileDescriptor) {
144 jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
147 int fd = jniGetFDFromFileDescriptor(env, fileDescriptor);
148 if (offset < 0 || length < 0 || fd < 0) {
150 ALOGE("negative offset (%lld)", (long long)offset);
153 ALOGE("negative length (%lld)", (long long)length);
156 ALOGE("invalid file descriptor");
158 jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
161 process_media_retriever_call(env, retriever->setDataSource(fd, offset, length), "java/lang/RuntimeException", "setDataSource failed");
165 static void rotate0(T* dst, const T* src, size_t width, size_t height)
167 memcpy(dst, src, width * height * sizeof(T));
171 static void rotate90(T* dst, const T* src, size_t width, size_t height)
173 for (size_t i = 0; i < height; ++i) {
174 for (size_t j = 0; j < width; ++j) {
175 dst[j * height + height - 1 - i] = src[i * width + j];
181 static void rotate180(T* dst, const T* src, size_t width, size_t height)
183 for (size_t i = 0; i < height; ++i) {
184 for (size_t j = 0; j < width; ++j) {
185 dst[(height - 1 - i) * width + width - 1 - j] = src[i * width + j];
191 static void rotate270(T* dst, const T* src, size_t width, size_t height)
193 for (size_t i = 0; i < height; ++i) {
194 for (size_t j = 0; j < width; ++j) {
195 dst[(width - 1 - j) * height + i] = src[i * width + j];
201 static void rotate(T *dst, const T *src, size_t width, size_t height, int angle)
205 rotate0(dst, src, width, height);
208 rotate90(dst, src, width, height);
211 rotate180(dst, src, width, height);
214 rotate270(dst, src, width, height);
219 static jobject android_media_MediaMetadataRetriever_getFrameAtTime(JNIEnv *env, jobject thiz, jlong timeUs, jint option)
221 ALOGV("getFrameAtTime: %lld us option: %d", timeUs, option);
222 MediaMetadataRetriever* retriever = getRetriever(env, thiz);
223 if (retriever == 0) {
224 jniThrowException(env, "java/lang/IllegalStateException", "No retriever available");
228 // Call native method to retrieve a video frame
229 VideoFrame *videoFrame = NULL;
230 sp<IMemory> frameMemory = retriever->getFrameAtTime(timeUs, option);
231 if (frameMemory != 0) { // cast the shared structure to a VideoFrame object
232 videoFrame = static_cast<VideoFrame *>(frameMemory->pointer());
234 if (videoFrame == NULL) {
235 ALOGE("getFrameAtTime: videoFrame is a NULL pointer");
239 ALOGV("Dimension = %dx%d and bytes = %d",
240 videoFrame->mDisplayWidth,
241 videoFrame->mDisplayHeight,
244 jobject config = env->CallStaticObjectMethod(
246 fields.createConfigMethod,
247 SkBitmap::kRGB_565_Config);
249 uint32_t width, height;
250 bool swapWidthAndHeight = false;
251 if (videoFrame->mRotationAngle == 90 || videoFrame->mRotationAngle == 270) {
252 width = videoFrame->mHeight;
253 height = videoFrame->mWidth;
254 swapWidthAndHeight = true;
256 width = videoFrame->mWidth;
257 height = videoFrame->mHeight;
260 jobject jBitmap = env->CallStaticObjectMethod(
262 fields.createBitmapMethod,
266 if (jBitmap == NULL) {
267 if (env->ExceptionCheck()) {
268 env->ExceptionClear();
270 ALOGE("getFrameAtTime: create Bitmap failed!");
275 (SkBitmap *) env->GetLongField(jBitmap, fields.nativeBitmap);
277 bitmap->lockPixels();
278 rotate((uint16_t*)bitmap->getPixels(),
279 (uint16_t*)((char*)videoFrame + sizeof(VideoFrame)),
282 videoFrame->mRotationAngle);
283 bitmap->unlockPixels();
285 if (videoFrame->mDisplayWidth != videoFrame->mWidth ||
286 videoFrame->mDisplayHeight != videoFrame->mHeight) {
287 uint32_t displayWidth = videoFrame->mDisplayWidth;
288 uint32_t displayHeight = videoFrame->mDisplayHeight;
289 if (swapWidthAndHeight) {
290 displayWidth = videoFrame->mDisplayHeight;
291 displayHeight = videoFrame->mDisplayWidth;
293 ALOGV("Bitmap dimension is scaled from %dx%d to %dx%d",
294 width, height, displayWidth, displayHeight);
295 jobject scaledBitmap = env->CallStaticObjectMethod(fields.bitmapClazz,
296 fields.createScaledBitmapMethod,
307 static jbyteArray android_media_MediaMetadataRetriever_getEmbeddedPicture(
308 JNIEnv *env, jobject thiz, jint pictureType)
310 ALOGV("getEmbeddedPicture: %d", pictureType);
311 MediaMetadataRetriever* retriever = getRetriever(env, thiz);
312 if (retriever == 0) {
313 jniThrowException(env, "java/lang/IllegalStateException", "No retriever available");
316 MediaAlbumArt* mediaAlbumArt = NULL;
319 // Use pictureType to retrieve the intended embedded picture and also change
320 // the method name to getEmbeddedPicture().
321 sp<IMemory> albumArtMemory = retriever->extractAlbumArt();
322 if (albumArtMemory != 0) { // cast the shared structure to a MediaAlbumArt object
323 mediaAlbumArt = static_cast<MediaAlbumArt *>(albumArtMemory->pointer());
325 if (mediaAlbumArt == NULL) {
326 ALOGE("getEmbeddedPicture: Call to getEmbeddedPicture failed.");
330 jbyteArray array = env->NewByteArray(mediaAlbumArt->size());
331 if (!array) { // OutOfMemoryError exception has already been thrown.
332 ALOGE("getEmbeddedPicture: OutOfMemoryError is thrown.");
335 reinterpret_cast<const jbyte*>(mediaAlbumArt->data());
336 env->SetByteArrayRegion(array, 0, mediaAlbumArt->size(), data);
339 // No need to delete mediaAlbumArt here
343 static jobject android_media_MediaMetadataRetriever_extractMetadata(JNIEnv *env, jobject thiz, jint keyCode)
345 ALOGV("extractMetadata");
346 MediaMetadataRetriever* retriever = getRetriever(env, thiz);
347 if (retriever == 0) {
348 jniThrowException(env, "java/lang/IllegalStateException", "No retriever available");
351 const char* value = retriever->extractMetadata(keyCode);
353 ALOGV("extractMetadata: Metadata is not found");
356 ALOGV("extractMetadata: value (%s) for keyCode(%d)", value, keyCode);
357 return env->NewStringUTF(value);
360 static void android_media_MediaMetadataRetriever_release(JNIEnv *env, jobject thiz)
363 Mutex::Autolock lock(sLock);
364 MediaMetadataRetriever* retriever = getRetriever(env, thiz);
366 setRetriever(env, thiz, (MediaMetadataRetriever*) 0);
369 static void android_media_MediaMetadataRetriever_native_finalize(JNIEnv *env, jobject thiz)
371 ALOGV("native_finalize");
372 // No lock is needed, since android_media_MediaMetadataRetriever_release() is protected
373 android_media_MediaMetadataRetriever_release(env, thiz);
376 // This function gets a field ID, which in turn causes class initialization.
377 // It is called from a static block in MediaMetadataRetriever, which won't run until the
378 // first time an instance of this class is used.
379 static void android_media_MediaMetadataRetriever_native_init(JNIEnv *env)
381 jclass clazz = env->FindClass(kClassPathName);
386 fields.context = env->GetFieldID(clazz, "mNativeContext", "J");
387 if (fields.context == NULL) {
391 jclass bitmapClazz = env->FindClass("android/graphics/Bitmap");
392 if (bitmapClazz == NULL) {
395 fields.bitmapClazz = (jclass) env->NewGlobalRef(bitmapClazz);
396 if (fields.bitmapClazz == NULL) {
399 fields.createBitmapMethod =
400 env->GetStaticMethodID(fields.bitmapClazz, "createBitmap",
401 "(IILandroid/graphics/Bitmap$Config;)"
402 "Landroid/graphics/Bitmap;");
403 if (fields.createBitmapMethod == NULL) {
406 fields.createScaledBitmapMethod =
407 env->GetStaticMethodID(fields.bitmapClazz, "createScaledBitmap",
408 "(Landroid/graphics/Bitmap;IIZ)"
409 "Landroid/graphics/Bitmap;");
410 if (fields.createScaledBitmapMethod == NULL) {
413 fields.nativeBitmap = env->GetFieldID(fields.bitmapClazz, "mNativeBitmap", "J");
414 if (fields.nativeBitmap == NULL) {
418 jclass configClazz = env->FindClass("android/graphics/Bitmap$Config");
419 if (configClazz == NULL) {
422 fields.configClazz = (jclass) env->NewGlobalRef(configClazz);
423 if (fields.configClazz == NULL) {
426 fields.createConfigMethod =
427 env->GetStaticMethodID(fields.configClazz, "nativeToConfig",
428 "(I)Landroid/graphics/Bitmap$Config;");
429 if (fields.createConfigMethod == NULL) {
434 static void android_media_MediaMetadataRetriever_native_setup(JNIEnv *env, jobject thiz)
436 ALOGV("native_setup");
437 MediaMetadataRetriever* retriever = new MediaMetadataRetriever();
438 if (retriever == 0) {
439 jniThrowException(env, "java/lang/RuntimeException", "Out of memory");
442 setRetriever(env, thiz, retriever);
445 // JNI mapping between Java methods and native methods
446 static JNINativeMethod nativeMethods[] = {
449 "(Ljava/lang/String;[Ljava/lang/String;[Ljava/lang/String;)V",
450 (void *)android_media_MediaMetadataRetriever_setDataSourceAndHeaders
453 {"setDataSource", "(Ljava/io/FileDescriptor;JJ)V", (void *)android_media_MediaMetadataRetriever_setDataSourceFD},
454 {"_getFrameAtTime", "(JI)Landroid/graphics/Bitmap;", (void *)android_media_MediaMetadataRetriever_getFrameAtTime},
455 {"extractMetadata", "(I)Ljava/lang/String;", (void *)android_media_MediaMetadataRetriever_extractMetadata},
456 {"getEmbeddedPicture", "(I)[B", (void *)android_media_MediaMetadataRetriever_getEmbeddedPicture},
457 {"release", "()V", (void *)android_media_MediaMetadataRetriever_release},
458 {"native_finalize", "()V", (void *)android_media_MediaMetadataRetriever_native_finalize},
459 {"native_setup", "()V", (void *)android_media_MediaMetadataRetriever_native_setup},
460 {"native_init", "()V", (void *)android_media_MediaMetadataRetriever_native_init},
463 // This function only registers the native methods, and is called from
464 // JNI_OnLoad in android_media_MediaPlayer.cpp
465 int register_android_media_MediaMetadataRetriever(JNIEnv *env)
467 return AndroidRuntime::registerNativeMethods
468 (env, kClassPathName, nativeMethods, NELEM(nativeMethods));