Initial checkin of "foundation" library for future stagefright development.

Change-Id: I11714dcaa647d0437a13e4c5b953b35e712da8f3

1 files changed, 100 insertions, 0 deletions

diff --git a/media/libstagefright/foundation/ALooperRoster.cpp b/media/libstagefright/foundation/ALooperRoster.cpp
new file mode 100644
index 00000000..5bb1cf9c
--- /dev/null
+++ b/media/libstagefright/foundation/ALooperRoster.cpp
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2010 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 "ALooperRoster"
+#include <utils/Log.h>
+
+#include "ALooperRoster.h"
+
+#include "ADebug.h"
+#include "AHandler.h"
+#include "AMessage.h"
+
+namespace android {
+
+ALooperRoster::ALooperRoster()
+    : mNextHandlerID(1) {
+}
+
+ALooper::handler_id ALooperRoster::registerHandler(
+        const sp<ALooper> looper, const sp<AHandler> &handler) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (handler->id() != 0) {
+        CHECK(!"A handler must only be registered once.");
+        return INVALID_OPERATION;
+    }
+
+    HandlerInfo info;
+    info.mLooper = looper;
+    info.mHandler = handler;
+    ALooper::handler_id handlerID = mNextHandlerID++;
+    mHandlers.add(handlerID, info);
+
+    handler->setID(handlerID);
+
+    return handlerID;
+}
+
+void ALooperRoster::unregisterHandler(ALooper::handler_id handlerID) {
+    Mutex::Autolock autoLock(mLock);
+
+    ssize_t index = mHandlers.indexOfKey(handlerID);
+    CHECK(index >= 0);
+
+    const HandlerInfo &info = mHandlers.valueAt(index);
+    info.mHandler->setID(0);
+
+    mHandlers.removeItemsAt(index);
+}
+
+void ALooperRoster::postMessage(
+        const sp<AMessage> &msg, int64_t delayUs) {
+    Mutex::Autolock autoLock(mLock);
+
+    ssize_t index = mHandlers.indexOfKey(msg->target());
+
+    if (index < 0) {
+        LOG(WARNING) << "failed to post message. Target handler not registered.";
+        return;
+    }
+
+    const HandlerInfo &info = mHandlers.valueAt(index);
+    info.mLooper->post(msg, delayUs);
+}
+
+void ALooperRoster::deliverMessage(const sp<AMessage> &msg) {
+    sp<AHandler> handler;
+
+    {
+        Mutex::Autolock autoLock(mLock);
+
+        ssize_t index = mHandlers.indexOfKey(msg->target());
+
+        if (index < 0) {
+            LOG(WARNING) << "failed to deliver message. Target handler not registered.";
+            return;
+        }
+
+        const HandlerInfo &info = mHandlers.valueAt(index);
+        handler = info.mHandler;
+    }
+
+    handler->onMessageReceived(msg);
+}
+
+}  // namespace android