auto import from //depot/cupcake/@135843

1 files changed, 327 insertions, 0 deletions

diff --git a/media/jni/android_media_MediaMetadataRetriever.cpp b/media/jni/android_media_MediaMetadataRetriever.cpp
new file mode 100644
index 0000000..4624a18
--- /dev/null
+++ b/media/jni/android_media_MediaMetadataRetriever.cpp
@@ -0,0 +1,327 @@
+/*
+**
+** Copyright 2008, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "MediaMetadataRetrieverJNI"
+
+#include <assert.h>
+#include <utils/Log.h>
+#include <utils/threads.h>
+#include <core/SkBitmap.h>
+#include <media/mediametadataretriever.h>
+#include <private/media/VideoFrame.h>
+
+#include "jni.h"
+#include "JNIHelp.h"
+#include "android_runtime/AndroidRuntime.h"
+
+
+using namespace android;
+
+struct fields_t {
+    jfieldID context;
+    jclass bitmapClazz;
+    jmethodID bitmapConstructor;
+};
+
+static fields_t fields;
+static Mutex sLock;
+
+static void process_media_retriever_call(JNIEnv *env, status_t opStatus, const char* exception, const char *message)
+{
+    if (opStatus == (status_t) INVALID_OPERATION) {
+        jniThrowException(env, "java/lang/IllegalStateException", NULL);
+    } else if (opStatus != (status_t) OK) {
+        if (strlen(message) > 230) {
+            // If the message is too long, don't bother displaying the status code.
+            jniThrowException( env, exception, message);
+        } else {
+            char msg[256];
+            // Append the status code to the message.
+            sprintf(msg, "%s: status = 0x%X", message, opStatus);
+            jniThrowException( env, exception, msg);
+        }
+    }
+}
+
+static MediaMetadataRetriever* getRetriever(JNIEnv* env, jobject thiz)
+{
+    // No lock is needed, since it is called internally by other methods that are protected
+    MediaMetadataRetriever* retriever = (MediaMetadataRetriever*) env->GetIntField(thiz, fields.context);
+    return retriever;
+}
+
+static void setRetriever(JNIEnv* env, jobject thiz, int retriever)
+{
+    // No lock is needed, since it is called internally by other methods that are protected
+    MediaMetadataRetriever *old = (MediaMetadataRetriever*) env->GetIntField(thiz, fields.context);
+    env->SetIntField(thiz, fields.context, retriever);
+}
+
+static void android_media_MediaMetadataRetriever_setDataSource(JNIEnv *env, jobject thiz, jstring path)
+{
+    LOGV("setDataSource");
+    Mutex::Autolock lock(sLock);
+    MediaMetadataRetriever* retriever = getRetriever(env, thiz);
+    if (retriever == 0) {
+        jniThrowException(env, "java/lang/IllegalStateException", "No retriever available");
+        return;
+    }
+    if (!path) {
+        jniThrowException(env, "java/lang/IllegalArgumentException", "Null pointer");
+        return;
+    }
+
+    const char *pathStr = env->GetStringUTFChars(path, NULL);
+    if (!pathStr) {  // OutOfMemoryError exception already thrown
+        return;
+    }
+
+    // Don't let somebody trick us in to reading some random block of memory
+    if (strncmp("mem://", pathStr, 6) == 0) {
+        jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid pathname");
+        return;
+    }
+
+    process_media_retriever_call(env, retriever->setDataSource(pathStr), "java/lang/RuntimeException", "setDataSource failed");
+    env->ReleaseStringUTFChars(path, pathStr);
+}
+
+static void android_media_MediaMetadataRetriever_setDataSourceFD(JNIEnv *env, jobject thiz, jobject fileDescriptor, jlong offset, jlong length)
+{
+    LOGV("setDataSource");
+    Mutex::Autolock lock(sLock);
+    MediaMetadataRetriever* retriever = getRetriever(env, thiz);
+    if (retriever == 0) {
+        jniThrowException(env, "java/lang/IllegalStateException", "No retriever available");
+        return;
+    }
+    if (!fileDescriptor) {
+        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+        return;
+    }
+    int fd = getParcelFileDescriptorFD(env, fileDescriptor);
+    if (offset < 0 || length < 0 || fd < 0) {
+        if (offset < 0) {
+            LOGE("negative offset (%lld)", offset);
+        }
+        if (length < 0) {
+            LOGE("negative length (%lld)", length);
+        }
+        if (fd < 0) {
+            LOGE("invalid file descriptor");
+        }
+        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+        return;
+    }
+    process_media_retriever_call(env, retriever->setDataSource(fd, offset, length), "java/lang/RuntimeException", "setDataSource failed");
+}
+
+static void android_media_MediaMetadataRetriever_setMode(JNIEnv *env, jobject thiz, jint mode)
+{
+    LOGV("setMode");
+    Mutex::Autolock lock(sLock);
+    MediaMetadataRetriever* retriever = getRetriever(env, thiz);
+    if (retriever == 0) {
+        jniThrowException(env, "java/lang/IllegalStateException", "No retriever available");
+        return;
+    }
+    process_media_retriever_call(env, retriever->setMode(mode), "java/lang/RuntimeException", "setMode failed");
+}
+
+static int android_media_MediaMetadataRetriever_getMode(JNIEnv *env, jobject thiz)
+{
+    LOGV("getMode");
+    Mutex::Autolock lock(sLock);
+    MediaMetadataRetriever* retriever = getRetriever(env, thiz);
+    if (retriever == 0) {
+        jniThrowException(env, "java/lang/IllegalStateException", "No retriever available");
+        return -1;  // Error
+    }
+    int mode = -1;
+    retriever->getMode(&mode);
+    return mode;
+}
+
+static jobject android_media_MediaMetadataRetriever_captureFrame(JNIEnv *env, jobject thiz)
+{
+    LOGV("captureFrame");
+    Mutex::Autolock lock(sLock);
+    MediaMetadataRetriever* retriever = getRetriever(env, thiz);
+    if (retriever == 0) {
+        jniThrowException(env, "java/lang/IllegalStateException", "No retriever available");
+        return NULL;
+    }
+
+    // Call native method to retrieve a video frame
+    VideoFrame *videoFrame = NULL;
+    sp<IMemory> frameMemory = retriever->captureFrame();
+    if (frameMemory != 0) {  // cast the shared structure to a VideoFrame object
+        videoFrame = static_cast<VideoFrame *>(frameMemory->pointer());
+    }
+    if (videoFrame == NULL) {
+        LOGE("captureFrame: videoFrame is a NULL pointer");
+        return NULL;
+    }
+
+    // Create a SkBitmap to hold the pixels
+    SkBitmap *bitmap = new SkBitmap();
+    if (bitmap == NULL) {
+        LOGE("captureFrame: cannot instantiate a SkBitmap object.");
+        return NULL;
+    }
+    bitmap->setConfig(SkBitmap::kRGB_565_Config, videoFrame->mDisplayWidth, videoFrame->mDisplayHeight);
+    if (!bitmap->allocPixels()) {
+        delete bitmap;
+        LOGE("failed to allocate pixel buffer");
+        return NULL;
+    }
+    memcpy((uint8_t*)bitmap->getPixels(), (uint8_t*)videoFrame + sizeof(VideoFrame), videoFrame->mSize);
+
+    // Since internally SkBitmap uses reference count to manage the reference to
+    // its pixels, it is important that the pixels (along with SkBitmap) be
+    // available after creating the Bitmap is returned to Java app.
+    return env->NewObject(fields.bitmapClazz, fields.bitmapConstructor, (int) bitmap, true, NULL);
+}
+
+static jbyteArray android_media_MediaMetadataRetriever_extractAlbumArt(JNIEnv *env, jobject thiz)
+{
+    LOGV("extractAlbumArt");
+    Mutex::Autolock lock(sLock);
+    MediaMetadataRetriever* retriever = getRetriever(env, thiz);
+    if (retriever == 0) {
+        jniThrowException(env, "java/lang/IllegalStateException", "No retriever available");
+        return NULL;
+    }
+    MediaAlbumArt* mediaAlbumArt = NULL;
+    sp<IMemory> albumArtMemory = retriever->extractAlbumArt();
+    if (albumArtMemory != 0) {  // cast the shared structure to a MediaAlbumArt object
+        mediaAlbumArt = static_cast<MediaAlbumArt *>(albumArtMemory->pointer());
+    }
+    if (mediaAlbumArt == NULL) {
+        LOGE("extractAlbumArt: Call to extractAlbumArt failed.");
+        return NULL;
+    }
+
+    unsigned int len = mediaAlbumArt->mSize;
+    char* data = (char*) mediaAlbumArt + sizeof(MediaAlbumArt);
+    jbyteArray array = env->NewByteArray(len);
+    if (!array) {  // OutOfMemoryError exception has already been thrown.
+        LOGE("extractAlbumArt: OutOfMemoryError is thrown.");
+    } else {
+        jbyte* bytes = env->GetByteArrayElements(array, NULL);
+        if (bytes != NULL) {
+            memcpy(bytes, data, len);
+            env->ReleaseByteArrayElements(array, bytes, 0);
+        }
+    }
+
+    // No need to delete mediaAlbumArt here
+    return array;
+}
+
+static jobject android_media_MediaMetadataRetriever_extractMetadata(JNIEnv *env, jobject thiz, jint keyCode)
+{
+    LOGV("extractMetadata");
+    Mutex::Autolock lock(sLock);
+    MediaMetadataRetriever* retriever = getRetriever(env, thiz);
+    if (retriever == 0) {
+        jniThrowException(env, "java/lang/IllegalStateException", "No retriever available");
+        return NULL;
+    }
+    const char* value = retriever->extractMetadata(keyCode);
+    if (!value) {
+        LOGV("extractMetadata: Metadata is not found");
+        return NULL;
+    }
+    LOGV("extractMetadata: value (%s) for keyCode(%d)", value, keyCode);
+    return env->NewStringUTF(value);
+}
+
+static void android_media_MediaMetadataRetriever_release(JNIEnv *env, jobject thiz)
+{
+    LOGV("release");
+    Mutex::Autolock lock(sLock);
+    MediaMetadataRetriever* retriever = getRetriever(env, thiz);
+    delete retriever;
+    setRetriever(env, thiz, 0);
+}
+
+static void android_media_MediaMetadataRetriever_native_finalize(JNIEnv *env, jobject thiz)
+{
+    LOGV("native_finalize");
+    
+    // No lock is needed, since android_media_MediaMetadataRetriever_release() is protected
+    android_media_MediaMetadataRetriever_release(env, thiz);
+}
+
+static void android_media_MediaMetadataRetriever_native_setup(JNIEnv *env, jobject thiz)
+{
+    LOGV("native_setup");
+    MediaMetadataRetriever* retriever = new MediaMetadataRetriever();
+    if (retriever == 0) {
+        jniThrowException(env, "java/lang/RuntimeException", "Out of memory");
+        return;
+    }
+    setRetriever(env, thiz, (int)retriever);
+}
+
+// JNI mapping between Java methods and native methods
+static JNINativeMethod nativeMethods[] = {
+        {"setDataSource",   "(Ljava/lang/String;)V", (void *)android_media_MediaMetadataRetriever_setDataSource},
+        {"setDataSource",   "(Ljava/io/FileDescriptor;JJ)V", (void *)android_media_MediaMetadataRetriever_setDataSourceFD},
+        {"setMode",         "(I)V", (void *)android_media_MediaMetadataRetriever_setMode},
+        {"getMode",         "()I",  (void *)android_media_MediaMetadataRetriever_getMode},
+        {"captureFrame",    "()Landroid/graphics/Bitmap;", (void *)android_media_MediaMetadataRetriever_captureFrame},
+        {"extractMetadata", "(I)Ljava/lang/String;", (void *)android_media_MediaMetadataRetriever_extractMetadata},
+        {"extractAlbumArt", "()[B", (void *)android_media_MediaMetadataRetriever_extractAlbumArt},
+        {"release",         "()V", (void *)android_media_MediaMetadataRetriever_release},
+        {"native_finalize", "()V", (void *)android_media_MediaMetadataRetriever_native_finalize},
+        {"native_setup",    "()V", (void *)android_media_MediaMetadataRetriever_native_setup},
+};
+
+// Register native mehtods with Android runtime environment
+int register_android_media_MediaMetadataRetriever(JNIEnv *env)
+{
+    static const char* const kClassPathName = "android/media/MediaMetadataRetriever";
+    jclass clazz = env->FindClass(kClassPathName);
+    if (clazz == NULL) {
+        LOGE("Can't find class: %s", kClassPathName);
+        return -1;
+    }
+
+    fields.context = env->GetFieldID(clazz, "mNativeContext", "I");
+    if (fields.context == NULL) {
+        LOGE("Can't find MediaMetadataRetriever.mNativeContext");
+        return -1;
+    }
+
+    fields.bitmapClazz = env->FindClass("android/graphics/Bitmap");
+    if (fields.bitmapClazz == NULL) {
+        LOGE("Bitmap class is not found");
+        return -1;
+    }
+
+    fields.bitmapConstructor = env->GetMethodID(fields.bitmapClazz, "<init>", "(IZ[B)V");
+    if (fields.bitmapConstructor == NULL) {
+        LOGE("Bitmap constructor is not found");
+        return -1;
+    }
+
+    return AndroidRuntime::registerNativeMethods
+    (env, kClassPathName, nativeMethods, NELEM(nativeMethods));
+}