From 89fa4ad53f2f4d57adbc97ae1149fc00c9b6f3c5 Mon Sep 17 00:00:00 2001
From: The Android Open Source Project <initial-contribution@android.com>
Date: Tue, 3 Mar 2009 19:31:44 -0800
Subject: auto import from //depot/cupcake/@135843

---
 media/libmedia/mediametadataretriever.cpp | 188 ++++++++++++++++++++++++++++++
 1 file changed, 188 insertions(+)
 create mode 100644 media/libmedia/mediametadataretriever.cpp

(limited to 'media/libmedia/mediametadataretriever.cpp')

diff --git a/media/libmedia/mediametadataretriever.cpp b/media/libmedia/mediametadataretriever.cpp
new file mode 100644
index 0000000..09afc6c
--- /dev/null
+++ b/media/libmedia/mediametadataretriever.cpp
@@ -0,0 +1,188 @@
+/*
+**
+** 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 "MediaMetadataRetriever"
+
+#include <utils/IServiceManager.h>
+#include <utils/IPCThreadState.h>
+#include <media/mediametadataretriever.h>
+#include <media/IMediaPlayerService.h>
+#include <utils/Log.h>
+#include <dlfcn.h>
+
+namespace android {
+
+// client singleton for binder interface to service
+Mutex MediaMetadataRetriever::sServiceLock;
+sp<IMediaPlayerService> MediaMetadataRetriever::sService;
+sp<MediaMetadataRetriever::DeathNotifier> MediaMetadataRetriever::sDeathNotifier;
+
+const sp<IMediaPlayerService>& MediaMetadataRetriever::getService()
+{
+    Mutex::Autolock lock(sServiceLock);
+    if (sService.get() == 0) {
+        sp<IServiceManager> sm = defaultServiceManager();
+        sp<IBinder> binder;
+        do {
+            binder = sm->getService(String16("media.player"));
+            if (binder != 0) {
+                break;
+            }
+            LOGW("MediaPlayerService not published, waiting...");
+            usleep(500000); // 0.5 s
+        } while(true);
+        if (sDeathNotifier == NULL) {
+            sDeathNotifier = new DeathNotifier();
+        }
+        binder->linkToDeath(sDeathNotifier);
+        sService = interface_cast<IMediaPlayerService>(binder);
+    }
+    LOGE_IF(sService == 0, "no MediaPlayerService!?");
+    return sService;
+}
+
+MediaMetadataRetriever::MediaMetadataRetriever()
+{
+    LOGV("constructor");
+    const sp<IMediaPlayerService>& service(getService());
+    if (service == 0) {
+        LOGE("failed to obtain MediaMetadataRetrieverService");
+        return;
+    }
+    sp<IMediaMetadataRetriever> retriever(service->createMetadataRetriever(getpid()));
+    if (retriever == 0) {
+        LOGE("failed to create IMediaMetadataRetriever object from server");
+    }
+    mRetriever = retriever;
+}
+
+MediaMetadataRetriever::~MediaMetadataRetriever()
+{
+    LOGV("destructor");
+    disconnect();
+    IPCThreadState::self()->flushCommands();
+}
+
+void MediaMetadataRetriever::disconnect()
+{
+    LOGV("disconnect");
+    sp<IMediaMetadataRetriever> retriever;
+    {
+        Mutex::Autolock _l(mLock);
+        retriever = mRetriever;
+        mRetriever.clear();
+    }
+    if (retriever != 0) {
+        retriever->disconnect();
+    }
+}
+
+status_t MediaMetadataRetriever::setDataSource(const char* srcUrl)
+{
+    LOGV("setDataSource");
+    if (mRetriever == 0) {
+        LOGE("retriever is not initialized");
+        return INVALID_OPERATION;
+    }
+    if (srcUrl == NULL) {
+        LOGE("data source is a null pointer");
+        return UNKNOWN_ERROR;
+    }
+    LOGV("data source (%s)", srcUrl);
+    return mRetriever->setDataSource(srcUrl);
+}
+
+status_t MediaMetadataRetriever::setDataSource(int fd, int64_t offset, int64_t length)
+{
+    LOGV("setDataSource(%d, %lld, %lld)", fd, offset, length);
+    if (mRetriever == 0) {
+        LOGE("retriever is not initialized");
+        return INVALID_OPERATION;
+    }
+    if (fd < 0 || offset < 0 || length < 0) {
+        LOGE("Invalid negative argument");
+        return UNKNOWN_ERROR;
+    }
+    return mRetriever->setDataSource(fd, offset, length);
+}
+
+status_t MediaMetadataRetriever::setMode(int mode)
+{
+    LOGV("setMode(%d)", mode);
+    if (mRetriever == 0) {
+        LOGE("retriever is not initialized");
+        return INVALID_OPERATION;
+    }
+    return mRetriever->setMode(mode);
+}
+
+status_t MediaMetadataRetriever::getMode(int* mode)
+{
+    LOGV("getMode");
+    if (mRetriever == 0) {
+        LOGE("retriever is not initialized");
+        return INVALID_OPERATION;
+    }
+    return mRetriever->getMode(mode);
+}
+
+sp<IMemory> MediaMetadataRetriever::captureFrame()
+{
+    LOGV("captureFrame");
+    if (mRetriever == 0) {
+        LOGE("retriever is not initialized");
+        return NULL;
+    }
+    return mRetriever->captureFrame();
+}
+
+const char* MediaMetadataRetriever::extractMetadata(int keyCode)
+{
+    LOGV("extractMetadata(%d)", keyCode);
+    if (mRetriever == 0) {
+        LOGE("retriever is not initialized");
+        return NULL;
+    }
+    return mRetriever->extractMetadata(keyCode);
+}
+
+sp<IMemory> MediaMetadataRetriever::extractAlbumArt()
+{
+    LOGV("extractAlbumArt");
+    if (mRetriever == 0) {
+        LOGE("retriever is not initialized");
+        return NULL;
+    }
+    return mRetriever->extractAlbumArt();
+}
+
+void MediaMetadataRetriever::DeathNotifier::binderDied(const wp<IBinder>& who) {
+    Mutex::Autolock lock(MediaMetadataRetriever::sServiceLock);
+    MediaMetadataRetriever::sService.clear();
+    LOGW("MediaMetadataRetriever server died!");
+}
+
+MediaMetadataRetriever::DeathNotifier::~DeathNotifier()
+{
+    Mutex::Autolock lock(sServiceLock);
+    if (sService != 0) {
+        sService->asBinder()->unlinkToDeath(this);
+    }
+}
+
+}; // namespace android
-- 
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