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

Change-Id: I11714dcaa647d0437a13e4c5b953b35e712da8f3
diff --git a/include/media/stagefright/foundation/AAtomizer.h b/include/media/stagefright/foundation/AAtomizer.h
new file mode 100644
index 0000000..5f3a678
--- /dev/null
+++ b/include/media/stagefright/foundation/AAtomizer.h
@@ -0,0 +1,51 @@
+/*
+ * 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.
+ */
+
+#ifndef A_ATOMIZER_H_
+
+#define A_ATOMIZER_H_
+
+#include <stdint.h>
+
+#include <media/stagefright/foundation/ABase.h>
+#include <media/stagefright/foundation/AString.h>
+#include <utils/List.h>
+#include <utils/Vector.h>
+#include <utils/threads.h>
+
+namespace android {
+
+struct AAtomizer {
+    static const char *Atomize(const char *name);
+
+private:
+    static AAtomizer gAtomizer;
+
+    Mutex mLock;
+    Vector<List<AString> > mAtoms;
+
+    AAtomizer();
+
+    const char *atomize(const char *name);
+
+    static uint32_t Hash(const char *s);
+
+    DISALLOW_EVIL_CONSTRUCTORS(AAtomizer);
+};
+
+}  // namespace android
+
+#endif  // A_ATOMIZER_H_
diff --git a/include/media/stagefright/foundation/ABase.h b/include/media/stagefright/foundation/ABase.h
new file mode 100644
index 0000000..9eceea3
--- /dev/null
+++ b/include/media/stagefright/foundation/ABase.h
@@ -0,0 +1,25 @@
+/*
+ * 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.
+ */
+
+#ifndef A_BASE_H_
+
+#define A_BASE_H_
+
+#define DISALLOW_EVIL_CONSTRUCTORS(name) \
+    name(const name &); \
+    name &operator=(const name &)
+
+#endif  // A_BASE_H_
diff --git a/include/media/stagefright/foundation/ABuffer.h b/include/media/stagefright/foundation/ABuffer.h
new file mode 100644
index 0000000..28f0aed
--- /dev/null
+++ b/include/media/stagefright/foundation/ABuffer.h
@@ -0,0 +1,71 @@
+/*
+ * 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.
+ */
+
+#ifndef A_BUFFER_H_
+
+#define A_BUFFER_H_
+
+#include <sys/types.h>
+#include <stdint.h>
+
+#include <media/stagefright/foundation/ABase.h>
+#include <utils/RefBase.h>
+
+namespace android {
+
+struct AMessage;
+
+struct ABuffer : public RefBase {
+    ABuffer(size_t capacity);
+    ABuffer(void *data, size_t capacity);
+
+    void setFarewellMessage(const sp<AMessage> msg);
+
+    uint8_t *base() { return (uint8_t *)mData; }
+    uint8_t *data() { return (uint8_t *)mData + mRangeOffset; }
+    size_t capacity() const { return mCapacity; }
+    size_t size() const { return mRangeLength; }
+    size_t offset() const { return mRangeOffset; }
+
+    void setRange(size_t offset, size_t size);
+
+    void setInt32Data(int32_t data) { mInt32Data = data; }
+    int32_t int32Data() const { return mInt32Data; }
+
+    sp<AMessage> meta();
+
+protected:
+    virtual ~ABuffer();
+
+private:
+    sp<AMessage> mFarewell;
+    sp<AMessage> mMeta;
+
+    void *mData;
+    size_t mCapacity;
+    size_t mRangeOffset;
+    size_t mRangeLength;
+
+    int32_t mInt32Data;
+
+    bool mOwnsData;
+
+    DISALLOW_EVIL_CONSTRUCTORS(ABuffer);
+};
+
+}  // namespace android
+
+#endif  // A_BUFFER_H_
diff --git a/include/media/stagefright/foundation/ADebug.h b/include/media/stagefright/foundation/ADebug.h
new file mode 100644
index 0000000..0f986a0
--- /dev/null
+++ b/include/media/stagefright/foundation/ADebug.h
@@ -0,0 +1,105 @@
+/*
+ * 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.
+ */
+
+#ifndef A_DEBUG_H_
+
+#define A_DEBUG_H_
+
+#include <string.h>
+
+#include <media/stagefright/foundation/ABase.h>
+#include <media/stagefright/foundation/AString.h>
+
+namespace android {
+
+enum LogType {
+    VERBOSE,
+    INFO,
+    WARNING,
+    ERROR,
+    FATAL,
+};
+
+struct Logger {
+    Logger(LogType type);
+    virtual ~Logger();
+
+    template<class T> Logger &operator<<(const T &x) {
+        mMessage.append(x);
+
+        return *this;
+    }
+
+private:
+    android::AString mMessage;
+    LogType mLogType;
+
+    DISALLOW_EVIL_CONSTRUCTORS(Logger);
+};
+
+const char *LeafName(const char *s);
+
+#undef LOG
+#define LOG(type)    Logger(type) << LeafName(__FILE__) << ":" << __LINE__ << " "
+
+#define CHECK(condition)                                \
+    do {                                                \
+        if (!(condition)) {                             \
+            LOG(FATAL) << "CHECK(" #condition ") failed.";    \
+        }                                               \
+    } while (false)
+
+#define MAKE_COMPARATOR(suffix,op)                          \
+    template<class A, class B>                              \
+    AString Compare_##suffix(const A &a, const B &b) {      \
+        AString res;                                        \
+        if (!(a op b)) {                                    \
+            res.append(a);                                  \
+            res.append(" vs. ");                            \
+            res.append(b);                                  \
+        }                                                   \
+        return res;                                         \
+    }
+
+MAKE_COMPARATOR(EQ,==)
+MAKE_COMPARATOR(NE,!=)
+MAKE_COMPARATOR(LE,<=)
+MAKE_COMPARATOR(GE,>=)
+MAKE_COMPARATOR(LT,<)
+MAKE_COMPARATOR(GT,>)
+
+#define CHECK_OP(x,y,suffix,op)                                         \
+    do {                                                                \
+        AString ___res = Compare_##suffix(x, y);                        \
+        if (!___res.empty()) {                                          \
+            LOG(FATAL) << "CHECK_" #suffix "(" #x "," #y ") failed: "   \
+                       << ___res;                                       \
+        }                                                               \
+    } while (false)
+
+#define CHECK_EQ(x,y)   CHECK_OP(x,y,EQ,==)
+#define CHECK_NE(x,y)   CHECK_OP(x,y,NE,!=)
+#define CHECK_LE(x,y)   CHECK_OP(x,y,LE,<=)
+#define CHECK_LT(x,y)   CHECK_OP(x,y,LT,<)
+#define CHECK_GE(x,y)   CHECK_OP(x,y,GE,>=)
+#define CHECK_GT(x,y)   CHECK_OP(x,y,GT,>)
+
+#define TRESPASS()      LOG(FATAL) << "Should not be here."
+
+}  // namespace android
+
+#endif  // A_DEBUG_H_
+
diff --git a/include/media/stagefright/foundation/AHandler.h b/include/media/stagefright/foundation/AHandler.h
new file mode 100644
index 0000000..9fccead
--- /dev/null
+++ b/include/media/stagefright/foundation/AHandler.h
@@ -0,0 +1,54 @@
+/*
+ * 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.
+ */
+
+#ifndef A_HANDLER_H_
+
+#define A_HANDLER_H_
+
+#include <media/stagefright/foundation/ALooper.h>
+#include <utils/RefBase.h>
+
+namespace android {
+
+struct AMessage;
+
+struct AHandler : public RefBase {
+    AHandler()
+        : mID(0) {
+    }
+
+    ALooper::handler_id id() const {
+        return mID;
+    }
+
+protected:
+    virtual void onMessageReceived(const sp<AMessage> &msg) = 0;
+
+private:
+    friend struct ALooperRoster;
+
+    ALooper::handler_id mID;
+
+    void setID(ALooper::handler_id id) {
+        mID = id;
+    }
+
+    DISALLOW_EVIL_CONSTRUCTORS(AHandler);
+};
+
+}  // namespace android
+
+#endif  // A_HANDLER_H_
diff --git a/include/media/stagefright/foundation/ALooper.h b/include/media/stagefright/foundation/ALooper.h
new file mode 100644
index 0000000..69ad837
--- /dev/null
+++ b/include/media/stagefright/foundation/ALooper.h
@@ -0,0 +1,75 @@
+/*
+ * 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.
+ */
+
+#ifndef A_LOOPER_H_
+
+#define A_LOOPER_H_
+
+#include <media/stagefright/foundation/ABase.h>
+#include <utils/Errors.h>
+#include <utils/KeyedVector.h>
+#include <utils/List.h>
+#include <utils/RefBase.h>
+#include <utils/threads.h>
+
+namespace android {
+
+struct AHandler;
+struct AMessage;
+
+struct ALooper : public RefBase {
+    typedef int32_t event_id;
+    typedef int32_t handler_id;
+
+    ALooper();
+
+    handler_id registerHandler(const sp<AHandler> &handler);
+    void unregisterHandler(handler_id handlerID);
+
+    status_t start(bool runOnCallingThread = false);
+    status_t stop();
+
+    static int64_t GetNowUs();
+
+protected:
+    virtual ~ALooper();
+
+private:
+    friend struct ALooperRoster;
+
+    struct Event {
+        int64_t mWhenUs;
+        sp<AMessage> mMessage;
+    };
+
+    Mutex mLock;
+    Condition mQueueChangedCondition;
+
+    List<Event> mEventQueue;
+
+    struct LooperThread;
+    sp<LooperThread> mThread;
+    bool mRunningLocally;
+
+    void post(const sp<AMessage> &msg, int64_t delayUs);
+    bool loop();
+
+    DISALLOW_EVIL_CONSTRUCTORS(ALooper);
+};
+
+}  // namespace android
+
+#endif  // A_LOOPER_H_
diff --git a/include/media/stagefright/foundation/ALooperRoster.h b/include/media/stagefright/foundation/ALooperRoster.h
new file mode 100644
index 0000000..1c6869c
--- /dev/null
+++ b/include/media/stagefright/foundation/ALooperRoster.h
@@ -0,0 +1,52 @@
+/*
+ * 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.
+ */
+
+#ifndef A_LOOPER_ROSTER_H_
+
+#define A_LOOPER_ROSTER_H_
+
+#include <media/stagefright/foundation/ALooper.h>
+#include <utils/KeyedVector.h>
+
+namespace android {
+
+struct ALooperRoster {
+    ALooperRoster();
+
+    ALooper::handler_id registerHandler(
+            const sp<ALooper> looper, const sp<AHandler> &handler);
+
+    void unregisterHandler(ALooper::handler_id handlerID);
+
+    void postMessage(const sp<AMessage> &msg, int64_t delayUs = 0);
+    void deliverMessage(const sp<AMessage> &msg);
+
+private:
+    struct HandlerInfo {
+        sp<ALooper> mLooper;
+        sp<AHandler> mHandler;
+    };
+
+    Mutex mLock;
+    KeyedVector<ALooper::handler_id, HandlerInfo> mHandlers;
+    ALooper::handler_id mNextHandlerID;
+
+    DISALLOW_EVIL_CONSTRUCTORS(ALooperRoster);
+};
+
+}  // namespace android
+
+#endif  // A_LOOPER_ROSTER_H_
diff --git a/include/media/stagefright/foundation/AMessage.h b/include/media/stagefright/foundation/AMessage.h
new file mode 100644
index 0000000..139c620
--- /dev/null
+++ b/include/media/stagefright/foundation/AMessage.h
@@ -0,0 +1,113 @@
+/*
+ * 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.
+ */
+
+#ifndef A_MESSAGE_H_
+
+#define A_MESSAGE_H_
+
+#include <media/stagefright/foundation/ABase.h>
+#include <media/stagefright/foundation/ALooper.h>
+#include <utils/KeyedVector.h>
+#include <utils/RefBase.h>
+
+namespace android {
+
+struct AString;
+
+struct AMessage : public RefBase {
+    AMessage(uint32_t what = 0, ALooper::handler_id target = 0);
+
+    void setWhat(uint32_t what);
+    uint32_t what() const;
+
+    void setTarget(ALooper::handler_id target);
+    ALooper::handler_id target() const;
+
+    void setInt32(const char *name, int32_t value);
+    void setInt64(const char *name, int64_t value);
+    void setSize(const char *name, size_t value);
+    void setFloat(const char *name, float value);
+    void setDouble(const char *name, double value);
+    void setPointer(const char *name, void *value);
+    void setString(const char *name, const char *s, ssize_t len = -1);
+    void setObject(const char *name, const sp<RefBase> &obj);
+    void setMessage(const char *name, const sp<AMessage> &obj);
+
+    bool findInt32(const char *name, int32_t *value) const;
+    bool findInt64(const char *name, int64_t *value) const;
+    bool findSize(const char *name, size_t *value) const;
+    bool findFloat(const char *name, float *value) const;
+    bool findDouble(const char *name, double *value) const;
+    bool findPointer(const char *name, void **value) const;
+    bool findString(const char *name, AString *value) const;
+    bool findObject(const char *name, sp<RefBase> *obj) const;
+    bool findMessage(const char *name, sp<AMessage> *obj) const;
+
+    void post(int64_t delayUs = 0);
+
+    sp<AMessage> dup() const;
+
+protected:
+    virtual ~AMessage();
+
+private:
+    enum Type {
+        kTypeInt32,
+        kTypeInt64,
+        kTypeSize,
+        kTypeFloat,
+        kTypeDouble,
+        kTypePointer,
+        kTypeString,
+        kTypeObject,
+        kTypeMessage,
+    };
+
+    uint32_t mWhat;
+    ALooper::handler_id mTarget;
+
+    struct Item {
+        union {
+            int32_t int32Value;
+            int64_t int64Value;
+            size_t sizeValue;
+            float floatValue;
+            double doubleValue;
+            void *ptrValue;
+            RefBase *refValue;
+            AString *stringValue;
+        } u;
+        const char *mName;
+        Type mType;
+    };
+
+    enum {
+        kMaxNumItems = 16
+    };
+    Item mItems[kMaxNumItems];
+    size_t mNumItems;
+
+    void clear();
+    Item *allocateItem(const char *name);
+    void freeItem(Item *item);
+    const Item *findItem(const char *name, Type type) const;
+
+    DISALLOW_EVIL_CONSTRUCTORS(AMessage);
+};
+
+}  // namespace android
+
+#endif  // A_MESSAGE_H_
diff --git a/include/media/stagefright/foundation/AString.h b/include/media/stagefright/foundation/AString.h
new file mode 100644
index 0000000..55ade64
--- /dev/null
+++ b/include/media/stagefright/foundation/AString.h
@@ -0,0 +1,94 @@
+/*
+ * 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.
+ */
+
+#ifndef A_STRING_H_
+
+#define A_STRING_H_
+
+#include <sys/types.h>
+
+namespace android {
+
+struct AString {
+    AString();
+    AString(const char *s);
+    AString(const char *s, size_t size);
+    AString(const AString &from);
+    AString(const AString &from, size_t offset, size_t n);
+    ~AString();
+
+    AString &operator=(const AString &from);
+    void setTo(const char *s);
+    void setTo(const char *s, size_t size);
+    void setTo(const AString &from, size_t offset, size_t n);
+
+    size_t size() const;
+    const char *c_str() const;
+
+    bool empty() const;
+
+    void clear();
+    void trim();
+    void erase(size_t start, size_t n);
+
+    void append(char c) { append(&c, 1); }
+    void append(const char *s);
+    void append(const char *s, size_t size);
+    void append(const AString &from);
+    void append(const AString &from, size_t offset, size_t n);
+    void append(int x);
+    void append(unsigned x);
+    void append(long x);
+    void append(unsigned long x);
+    void append(long long x);
+    void append(unsigned long long x);
+    void append(float x);
+    void append(double x);
+    void append(void *x);
+
+    void insert(const AString &from, size_t insertionPos);
+    void insert(const char *from, size_t size, size_t insertionPos);
+
+    ssize_t find(const char *substring, size_t start = 0) const;
+
+    size_t hash() const;
+
+    bool operator==(const AString &other) const;
+    bool operator<(const AString &other) const;
+    bool operator>(const AString &other) const;
+
+    int compare(const AString &other) const;
+
+    bool startsWith(const char *prefix) const;
+
+    void tolower();
+
+private:
+    static const char *kEmptyString;
+
+    char *mData;
+    size_t mSize;
+    size_t mAllocSize;
+
+    void makeMutable();
+};
+
+AString StringPrintf(const char *format, ...);
+
+}  // namespace android
+
+#endif  // A_STRING_H_
+
diff --git a/include/media/stagefright/foundation/base64.h b/include/media/stagefright/foundation/base64.h
new file mode 100644
index 0000000..e340b89
--- /dev/null
+++ b/include/media/stagefright/foundation/base64.h
@@ -0,0 +1,33 @@
+/*
+ * 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.
+ */
+
+#ifndef BASE_64_H_
+
+#define BASE_64_H_
+
+#include <utils/RefBase.h>
+
+namespace android {
+
+struct ABuffer;
+struct AString;
+
+sp<ABuffer> decodeBase64(const AString &s);
+void encodeBase64(const void *data, size_t size, AString *out);
+
+}  // namespace android
+
+#endif  // BASE_64_H_
diff --git a/include/media/stagefright/foundation/hexdump.h b/include/media/stagefright/foundation/hexdump.h
new file mode 100644
index 0000000..f6083a9
--- /dev/null
+++ b/include/media/stagefright/foundation/hexdump.h
@@ -0,0 +1,29 @@
+/*
+ * 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.
+ */
+
+#ifndef HEXDUMP_H_
+
+#define HEXDUMP_H_
+
+#include <sys/types.h>
+
+namespace android {
+
+void hexdump(const void *_data, size_t size);
+
+}  // namespace android
+
+#endif  // HEXDUMP_H_
diff --git a/media/libstagefright/foundation/AAtomizer.cpp b/media/libstagefright/foundation/AAtomizer.cpp
new file mode 100644
index 0000000..b7b9e9f
--- /dev/null
+++ b/media/libstagefright/foundation/AAtomizer.cpp
@@ -0,0 +1,67 @@
+/*
+ * 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.
+ */
+
+#include <sys/types.h>
+
+#include "AAtomizer.h"
+
+namespace android {
+
+// static
+AAtomizer AAtomizer::gAtomizer;
+
+// static
+const char *AAtomizer::Atomize(const char *name) {
+    return gAtomizer.atomize(name);
+}
+
+AAtomizer::AAtomizer() {
+    for (size_t i = 0; i < 128; ++i) {
+        mAtoms.push(List<AString>());
+    }
+}
+
+const char *AAtomizer::atomize(const char *name) {
+    Mutex::Autolock autoLock(mLock);
+
+    const size_t n = mAtoms.size();
+    size_t index = AAtomizer::Hash(name) % n;
+    List<AString> &entry = mAtoms.editItemAt(index);
+    List<AString>::iterator it = entry.begin();
+    while (it != entry.end()) {
+        if ((*it) == name) {
+            return (*it).c_str();
+        }
+        ++it;
+    }
+
+    entry.push_back(AString(name));
+
+    return (*--entry.end()).c_str();
+}
+
+// static
+uint32_t AAtomizer::Hash(const char *s) {
+    uint32_t sum = 0;
+    while (*s != '\0') {
+        sum = (sum * 31) + *s;
+        ++s;
+    }
+
+    return sum;
+}
+
+}  // namespace android
diff --git a/media/libstagefright/foundation/ABuffer.cpp b/media/libstagefright/foundation/ABuffer.cpp
new file mode 100644
index 0000000..6173db4
--- /dev/null
+++ b/media/libstagefright/foundation/ABuffer.cpp
@@ -0,0 +1,76 @@
+/*
+ * 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.
+ */
+
+#include "ABuffer.h"
+
+#include "ADebug.h"
+#include "ALooper.h"
+#include "AMessage.h"
+
+namespace android {
+
+ABuffer::ABuffer(size_t capacity)
+    : mData(malloc(capacity)),
+      mCapacity(capacity),
+      mRangeOffset(0),
+      mRangeLength(capacity),
+      mInt32Data(0),
+      mOwnsData(true) {
+}
+
+ABuffer::ABuffer(void *data, size_t capacity)
+    : mData(data),
+      mCapacity(capacity),
+      mRangeOffset(0),
+      mRangeLength(capacity),
+      mInt32Data(0),
+      mOwnsData(false) {
+}
+
+ABuffer::~ABuffer() {
+    if (mOwnsData) {
+        if (mData != NULL) {
+            free(mData);
+            mData = NULL;
+        }
+    }
+
+    if (mFarewell != NULL) {
+        mFarewell->post();
+    }
+}
+
+void ABuffer::setRange(size_t offset, size_t size) {
+    CHECK_LE(offset, mCapacity);
+    CHECK_LE(offset + size, mCapacity);
+
+    mRangeOffset = offset;
+    mRangeLength = size;
+}
+
+void ABuffer::setFarewellMessage(const sp<AMessage> msg) {
+    mFarewell = msg;
+}
+
+sp<AMessage> ABuffer::meta() {
+    if (mMeta == NULL) {
+        mMeta = new AMessage;
+    }
+    return mMeta;
+}
+
+}  // namespace android
+
diff --git a/media/libstagefright/foundation/ADebug.cpp b/media/libstagefright/foundation/ADebug.cpp
new file mode 100644
index 0000000..16f8b22
--- /dev/null
+++ b/media/libstagefright/foundation/ADebug.cpp
@@ -0,0 +1,76 @@
+/*
+ * 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.
+ */
+
+#include "ADebug.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifdef ANDROID
+#include <cutils/log.h>
+#endif
+
+namespace android {
+
+Logger::Logger(LogType type)
+    : mLogType(type) {
+    switch (mLogType) {
+        case VERBOSE:
+            mMessage = "V ";
+            break;
+        case INFO:
+            mMessage = "I ";
+            break;
+        case WARNING:
+            mMessage = "W ";
+            break;
+        case ERROR:
+            mMessage = "E ";
+            break;
+        case FATAL:
+            mMessage = "F ";
+            break;
+
+        default:
+            break;
+    }
+}
+
+Logger::~Logger() {
+    if (mLogType == VERBOSE) {
+        return;
+    }
+
+    mMessage.append("\n");
+
+#if defined(ANDROID) && 1
+    LOG_PRI(ANDROID_LOG_INFO, "ADebug", "%s", mMessage.c_str());
+#else
+    fprintf(stderr, mMessage.c_str());
+    fflush(stderr);
+#endif
+
+    if (mLogType == FATAL) {
+        abort();
+    }
+}
+
+const char *LeafName(const char *s) {
+    const char *lastSlash = strrchr(s, '/');
+    return lastSlash != NULL ? lastSlash + 1 : s;
+}
+
+}  // namespace android
diff --git a/media/libstagefright/foundation/ALooper.cpp b/media/libstagefright/foundation/ALooper.cpp
new file mode 100644
index 0000000..831fa2a
--- /dev/null
+++ b/media/libstagefright/foundation/ALooper.cpp
@@ -0,0 +1,196 @@
+/*
+ * 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 "ALooper"
+#include <utils/Log.h>
+
+#include <sys/time.h>
+
+#include "ALooper.h"
+
+#include "AHandler.h"
+#include "ALooperRoster.h"
+#include "AMessage.h"
+
+namespace android {
+
+ALooperRoster gLooperRoster;
+
+struct ALooper::LooperThread : public Thread {
+    LooperThread(ALooper *looper)
+        : mLooper(looper) {
+    }
+
+    virtual bool threadLoop() {
+        return mLooper->loop();
+    }
+
+protected:
+    virtual ~LooperThread() {}
+
+private:
+    ALooper *mLooper;
+
+    DISALLOW_EVIL_CONSTRUCTORS(LooperThread);
+};
+
+// static
+int64_t ALooper::GetNowUs() {
+    struct timeval tv;
+    gettimeofday(&tv, NULL);
+
+    return (int64_t)tv.tv_sec * 1000000ll + tv.tv_usec;
+}
+
+ALooper::ALooper()
+    : mRunningLocally(false) {
+}
+
+ALooper::~ALooper() {
+    stop();
+}
+
+ALooper::handler_id ALooper::registerHandler(const sp<AHandler> &handler) {
+    return gLooperRoster.registerHandler(this, handler);
+}
+
+void ALooper::unregisterHandler(handler_id handlerID) {
+    gLooperRoster.unregisterHandler(handlerID);
+}
+
+status_t ALooper::start(bool runOnCallingThread) {
+    if (runOnCallingThread) {
+        {
+            Mutex::Autolock autoLock(mLock);
+
+            if (mThread != NULL || mRunningLocally) {
+                return INVALID_OPERATION;
+            }
+
+            mRunningLocally = true;
+        }
+
+        do {
+        } while (loop());
+
+        return OK;
+    }
+
+    Mutex::Autolock autoLock(mLock);
+
+    if (mThread != NULL || mRunningLocally) {
+        return INVALID_OPERATION;
+    }
+
+    mThread = new LooperThread(this);
+
+    status_t err = mThread->run("ALooper");
+    if (err != OK) {
+        mThread.clear();
+    }
+
+    return err;
+}
+
+status_t ALooper::stop() {
+    sp<LooperThread> thread;
+    bool runningLocally;
+
+    {
+        Mutex::Autolock autoLock(mLock);
+
+        thread = mThread;
+        runningLocally = mRunningLocally;
+        mThread.clear();
+        mRunningLocally = false;
+    }
+
+    if (thread == NULL && !runningLocally) {
+        return INVALID_OPERATION;
+    }
+
+    if (thread != NULL) {
+        thread->requestExit();
+    }
+
+    mQueueChangedCondition.signal();
+
+    if (!runningLocally) {
+        thread->requestExitAndWait();
+    }
+
+    return OK;
+}
+
+void ALooper::post(const sp<AMessage> &msg, int64_t delayUs) {
+    Mutex::Autolock autoLock(mLock);
+
+    int64_t whenUs;
+    if (delayUs > 0) {
+        whenUs = GetNowUs() + delayUs;
+    } else {
+        whenUs = GetNowUs();
+    }
+
+    List<Event>::iterator it = mEventQueue.begin();
+    while (it != mEventQueue.end() && (*it).mWhenUs <= whenUs) {
+        ++it;
+    }
+
+    Event event;
+    event.mWhenUs = whenUs;
+    event.mMessage = msg;
+
+    if (it == mEventQueue.begin()) {
+        mQueueChangedCondition.signal();
+    }
+
+    mEventQueue.insert(it, event);
+}
+
+bool ALooper::loop() {
+    Event event;
+
+    {
+        Mutex::Autolock autoLock(mLock);
+        if (mThread == NULL && !mRunningLocally) {
+            return false;
+        }
+        if (mEventQueue.empty()) {
+            mQueueChangedCondition.wait(mLock);
+            return true;
+        }
+        int64_t whenUs = (*mEventQueue.begin()).mWhenUs;
+        int64_t nowUs = GetNowUs();
+
+        if (whenUs > nowUs) {
+            int64_t delayUs = whenUs - nowUs;
+            mQueueChangedCondition.waitRelative(mLock, delayUs * 1000ll);
+
+            return true;
+        }
+
+        event = *mEventQueue.begin();
+        mEventQueue.erase(mEventQueue.begin());
+    }
+
+    gLooperRoster.deliverMessage(event.mMessage);
+
+    return true;
+}
+
+}  // namespace android
diff --git a/media/libstagefright/foundation/ALooperRoster.cpp b/media/libstagefright/foundation/ALooperRoster.cpp
new file mode 100644
index 0000000..5bb1cf9
--- /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
diff --git a/media/libstagefright/foundation/AMessage.cpp b/media/libstagefright/foundation/AMessage.cpp
new file mode 100644
index 0000000..dfd1ae3
--- /dev/null
+++ b/media/libstagefright/foundation/AMessage.cpp
@@ -0,0 +1,241 @@
+/*
+ * 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.
+ */
+
+#include "AMessage.h"
+
+#include "AAtomizer.h"
+#include "ADebug.h"
+#include "ALooperRoster.h"
+#include "AString.h"
+
+namespace android {
+
+AMessage::AMessage(uint32_t what, ALooper::handler_id target)
+    : mWhat(what),
+      mTarget(target),
+      mNumItems(0) {
+}
+
+AMessage::~AMessage() {
+    clear();
+}
+
+void AMessage::setWhat(uint32_t what) {
+    mWhat = what;
+}
+
+uint32_t AMessage::what() const {
+    return mWhat;
+}
+
+void AMessage::setTarget(ALooper::handler_id handlerID) {
+    mTarget = handlerID;
+}
+
+ALooper::handler_id AMessage::target() const {
+    return mTarget;
+}
+
+void AMessage::clear() {
+    for (size_t i = 0; i < mNumItems; ++i) {
+        Item *item = &mItems[i];
+        freeItem(item);
+    }
+    mNumItems = 0;
+}
+
+void AMessage::freeItem(Item *item) {
+    switch (item->mType) {
+        case kTypeString:
+        {
+            delete item->u.stringValue;
+            break;
+        }
+
+        case kTypeObject:
+        case kTypeMessage:
+        {
+            if (item->u.refValue != NULL) {
+                item->u.refValue->decStrong(this);
+            }
+            break;
+        }
+
+        default:
+            break;
+    }
+}
+
+AMessage::Item *AMessage::allocateItem(const char *name) {
+    name = AAtomizer::Atomize(name);
+
+    size_t i = 0;
+    while (i < mNumItems && mItems[i].mName != name) {
+        ++i;
+    }
+
+    Item *item;
+
+    if (i < mNumItems) {
+        item = &mItems[i];
+        freeItem(item);
+    } else {
+        CHECK(mNumItems < kMaxNumItems);
+        i = mNumItems++;
+        item = &mItems[i];
+
+        item->mName = name;
+    }
+
+    return item;
+}
+
+const AMessage::Item *AMessage::findItem(
+        const char *name, Type type) const {
+    name = AAtomizer::Atomize(name);
+
+    for (size_t i = 0; i < mNumItems; ++i) {
+        const Item *item = &mItems[i];
+
+        if (item->mName == name) {
+            return item->mType == type ? item : NULL;
+        }
+    }
+
+    return NULL;
+}
+
+#define BASIC_TYPE(NAME,FIELDNAME,TYPENAME)                             \
+void AMessage::set##NAME(const char *name, TYPENAME value) {            \
+    Item *item = allocateItem(name);                                    \
+                                                                        \
+    item->mType = kType##NAME;                                          \
+    item->u.FIELDNAME = value;                                          \
+}                                                                       \
+                                                                        \
+bool AMessage::find##NAME(const char *name, TYPENAME *value) const {    \
+    const Item *item = findItem(name, kType##NAME);                     \
+    if (item) {                                                         \
+        *value = item->u.FIELDNAME;                                     \
+        return true;                                                    \
+    }                                                                   \
+    return false;                                                       \
+}
+
+BASIC_TYPE(Int32,int32Value,int32_t)
+BASIC_TYPE(Int64,int64Value,int64_t)
+BASIC_TYPE(Size,sizeValue,size_t)
+BASIC_TYPE(Float,floatValue,float)
+BASIC_TYPE(Double,doubleValue,double)
+BASIC_TYPE(Pointer,ptrValue,void *)
+
+#undef BASIC_TYPE
+
+void AMessage::setString(
+        const char *name, const char *s, ssize_t len) {
+    Item *item = allocateItem(name);
+    item->mType = kTypeString;
+    item->u.stringValue = new AString(s, len < 0 ? strlen(s) : len);
+}
+
+void AMessage::setObject(const char *name, const sp<RefBase> &obj) {
+    Item *item = allocateItem(name);
+    item->mType = kTypeObject;
+
+    if (obj != NULL) { obj->incStrong(this); }
+    item->u.refValue = obj.get();
+}
+
+void AMessage::setMessage(const char *name, const sp<AMessage> &obj) {
+    Item *item = allocateItem(name);
+    item->mType = kTypeMessage;
+
+    if (obj != NULL) { obj->incStrong(this); }
+    item->u.refValue = obj.get();
+}
+
+bool AMessage::findString(const char *name, AString *value) const {
+    const Item *item = findItem(name, kTypeString);
+    if (item) {
+        *value = *item->u.stringValue;
+        return true;
+    }
+    return false;
+}
+
+bool AMessage::findObject(const char *name, sp<RefBase> *obj) const {
+    const Item *item = findItem(name, kTypeObject);
+    if (item) {
+        *obj = item->u.refValue;
+        return true;
+    }
+    return false;
+}
+
+bool AMessage::findMessage(const char *name, sp<AMessage> *obj) const {
+    const Item *item = findItem(name, kTypeMessage);
+    if (item) {
+        *obj = static_cast<AMessage *>(item->u.refValue);
+        return true;
+    }
+    return false;
+}
+
+void AMessage::post(int64_t delayUs) {
+    extern ALooperRoster gLooperRoster;
+
+    gLooperRoster.postMessage(this, delayUs);
+}
+
+sp<AMessage> AMessage::dup() const {
+    sp<AMessage> msg = new AMessage(mWhat, mTarget);
+    msg->mNumItems = mNumItems;
+
+    for (size_t i = 0; i < mNumItems; ++i) {
+        const Item *from = &mItems[i];
+        Item *to = &msg->mItems[i];
+
+        to->mName = from->mName;
+        to->mType = from->mType;
+
+        switch (from->mType) {
+            case kTypeString:
+            {
+                to->u.stringValue =
+                    new AString(*from->u.stringValue);
+                break;
+            }
+
+            case kTypeObject:
+            case kTypeMessage:
+            {
+                to->u.refValue = from->u.refValue;
+                to->u.refValue->incStrong(msg.get());
+                break;
+            }
+
+            default:
+            {
+                to->u = from->u;
+                break;
+            }
+        }
+    }
+
+    return msg;
+}
+
+}  // namespace android
diff --git a/media/libstagefright/foundation/AString.cpp b/media/libstagefright/foundation/AString.cpp
new file mode 100644
index 0000000..61b76cf
--- /dev/null
+++ b/media/libstagefright/foundation/AString.cpp
@@ -0,0 +1,331 @@
+/*
+ * 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.
+ */
+
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "ADebug.h"
+#include "AString.h"
+
+namespace android {
+
+// static
+const char *AString::kEmptyString = "";
+
+AString::AString()
+    : mData((char *)kEmptyString),
+      mSize(0),
+      mAllocSize(1) {
+}
+
+AString::AString(const char *s)
+    : mData(NULL),
+      mSize(0),
+      mAllocSize(1) {
+    setTo(s);
+}
+
+AString::AString(const char *s, size_t size)
+    : mData(NULL),
+      mSize(0),
+      mAllocSize(1) {
+    setTo(s, size);
+}
+
+AString::AString(const AString &from)
+    : mData(NULL),
+      mSize(0),
+      mAllocSize(1) {
+    setTo(from, 0, from.size());
+}
+
+AString::AString(const AString &from, size_t offset, size_t n)
+    : mData(NULL),
+      mSize(0),
+      mAllocSize(1) {
+    setTo(from, offset, n);
+}
+
+AString::~AString() {
+    clear();
+}
+
+AString &AString::operator=(const AString &from) {
+    if (&from != this) {
+        setTo(from, 0, from.size());
+    }
+
+    return *this;
+}
+
+size_t AString::size() const {
+    return mSize;
+}
+
+const char *AString::c_str() const {
+    return mData;
+}
+
+bool AString::empty() const {
+    return mSize == 0;
+}
+
+void AString::setTo(const char *s) {
+    setTo(s, strlen(s));
+}
+
+void AString::setTo(const char *s, size_t size) {
+    clear();
+    append(s, size);
+}
+
+void AString::setTo(const AString &from, size_t offset, size_t n) {
+    CHECK(&from != this);
+
+    clear();
+    setTo(from.mData + offset, n);
+}
+
+void AString::clear() {
+    if (mData && mData != kEmptyString) {
+        free(mData);
+        mData = NULL;
+    }
+
+    mData = (char *)kEmptyString;
+    mSize = 0;
+    mAllocSize = 1;
+}
+
+size_t AString::hash() const {
+    size_t x = 0;
+    for (size_t i = 0; i < mSize; ++i) {
+        x = (x * 31) + mData[i];
+    }
+
+    return x;
+}
+
+bool AString::operator==(const AString &other) const {
+    return mSize == other.mSize && !memcmp(mData, other.mData, mSize);
+}
+
+void AString::trim() {
+    makeMutable();
+
+    size_t i = 0;
+    while (i < mSize && isspace(mData[i])) {
+        ++i;
+    }
+
+    size_t j = mSize;
+    while (j > i && isspace(mData[j - 1])) {
+        --j;
+    }
+
+    memmove(mData, &mData[i], j - i);
+    mSize = j - i;
+    mData[mSize] = '\0';
+}
+
+void AString::erase(size_t start, size_t n) {
+    CHECK_LT(start, mSize);
+    CHECK_LE(start + n, mSize);
+
+    makeMutable();
+
+    memmove(&mData[start], &mData[start + n], mSize - start - n);
+    mSize -= n;
+    mData[mSize] = '\0';
+}
+
+void AString::makeMutable() {
+    if (mData == kEmptyString) {
+        mData = strdup(kEmptyString);
+    }
+}
+
+void AString::append(const char *s) {
+    append(s, strlen(s));
+}
+
+void AString::append(const char *s, size_t size) {
+    makeMutable();
+
+    if (mSize + size + 1 > mAllocSize) {
+        mAllocSize = (mAllocSize + size + 31) & -32;
+        mData = (char *)realloc(mData, mAllocSize);
+        CHECK(mData != NULL);
+    }
+
+    memcpy(&mData[mSize], s, size);
+    mSize += size;
+    mData[mSize] = '\0';
+}
+
+void AString::append(const AString &from) {
+    append(from.c_str(), from.size());
+}
+
+void AString::append(const AString &from, size_t offset, size_t n) {
+    append(from.c_str() + offset, n);
+}
+
+void AString::append(int x) {
+    char s[16];
+    sprintf(s, "%d", x);
+
+    append(s);
+}
+
+void AString::append(unsigned x) {
+    char s[16];
+    sprintf(s, "%u", x);
+
+    append(s);
+}
+
+void AString::append(long x) {
+    char s[16];
+    sprintf(s, "%ld", x);
+
+    append(s);
+}
+
+void AString::append(unsigned long x) {
+    char s[16];
+    sprintf(s, "%lu", x);
+
+    append(s);
+}
+
+void AString::append(long long x) {
+    char s[32];
+    sprintf(s, "%lld", x);
+
+    append(s);
+}
+
+void AString::append(unsigned long long x) {
+    char s[32];
+    sprintf(s, "%llu", x);
+
+    append(s);
+}
+
+void AString::append(float x) {
+    char s[16];
+    sprintf(s, "%f", x);
+
+    append(s);
+}
+
+void AString::append(double x) {
+    char s[16];
+    sprintf(s, "%f", x);
+
+    append(s);
+}
+
+void AString::append(void *x) {
+    char s[16];
+    sprintf(s, "%p", x);
+
+    append(s);
+}
+
+ssize_t AString::find(const char *substring, size_t start) const {
+    CHECK_LE(start, size());
+
+    const char *match = strstr(mData + start, substring);
+
+    if (match == NULL) {
+        return -1;
+    }
+
+    return match - mData;
+}
+
+void AString::insert(const AString &from, size_t insertionPos) {
+    insert(from.c_str(), from.size(), insertionPos);
+}
+
+void AString::insert(const char *from, size_t size, size_t insertionPos) {
+    CHECK_GE(insertionPos, 0u);
+    CHECK_LE(insertionPos, mSize);
+
+    makeMutable();
+
+    if (mSize + size + 1 > mAllocSize) {
+        mAllocSize = (mAllocSize + size + 31) & -32;
+        mData = (char *)realloc(mData, mAllocSize);
+        CHECK(mData != NULL);
+    }
+
+    memmove(&mData[insertionPos + size],
+            &mData[insertionPos], mSize - insertionPos + 1);
+
+    memcpy(&mData[insertionPos], from, size);
+
+    mSize += size;
+}
+
+bool AString::operator<(const AString &other) const {
+    return compare(other) < 0;
+}
+
+bool AString::operator>(const AString &other) const {
+    return compare(other) > 0;
+}
+
+int AString::compare(const AString &other) const {
+    return strcmp(mData, other.mData);
+}
+
+void AString::tolower() {
+    makeMutable();
+
+    for (size_t i = 0; i < mSize; ++i) {
+        mData[i] = ::tolower(mData[i]);
+    }
+}
+
+bool AString::startsWith(const char *prefix) const {
+    return !strncmp(mData, prefix, strlen(prefix));
+}
+
+AString StringPrintf(const char *format, ...) {
+    va_list ap;
+    va_start(ap, format);
+
+    char *buffer;
+    vasprintf(&buffer, format, ap);
+
+    va_end(ap);
+
+    AString result(buffer);
+
+    free(buffer);
+    buffer = NULL;
+
+    return result;
+}
+
+}  // namespace android
+
diff --git a/media/libstagefright/foundation/Android.mk b/media/libstagefright/foundation/Android.mk
new file mode 100644
index 0000000..73047e7
--- /dev/null
+++ b/media/libstagefright/foundation/Android.mk
@@ -0,0 +1,35 @@
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES:=               \
+    AAtomizer.cpp               \
+    ABuffer.cpp                 \
+    ADebug.cpp                  \
+    ALooper.cpp                 \
+    ALooperRoster.cpp           \
+    AMessage.cpp                \
+    AString.cpp                 \
+    base64.cpp                  \
+    hexdump.cpp
+
+LOCAL_C_INCLUDES:= \
+    frameworks/base/include/media/stagefright/foundation
+
+LOCAL_SHARED_LIBRARIES := \
+        libbinder         \
+        libmedia          \
+        libutils          \
+        libcutils         \
+        libui             \
+        libsonivox        \
+        libvorbisidec     \
+        libsurfaceflinger_client \
+        libcamera_client
+
+LOCAL_CFLAGS += -Wno-multichar
+
+LOCAL_MODULE:= libstagefright_foundation
+
+LOCAL_PRELINK_MODULE:= false
+
+include $(BUILD_SHARED_LIBRARY)
diff --git a/media/libstagefright/foundation/base64.cpp b/media/libstagefright/foundation/base64.cpp
new file mode 100644
index 0000000..d5fb4e0
--- /dev/null
+++ b/media/libstagefright/foundation/base64.cpp
@@ -0,0 +1,139 @@
+/*
+ * 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.
+ */
+
+#include "base64.h"
+
+#include "ABuffer.h"
+#include "ADebug.h"
+
+namespace android {
+
+sp<ABuffer> decodeBase64(const AString &s) {
+    if ((s.size() % 4) != 0) {
+        return NULL;
+    }
+
+    size_t n = s.size();
+    size_t padding = 0;
+    if (n >= 1 && s.c_str()[n - 1] == '=') {
+        padding = 1;
+
+        if (n >= 2 && s.c_str()[n - 2] == '=') {
+            padding = 2;
+        }
+    }
+
+    size_t outLen = 3 * s.size() / 4 - padding;
+
+    sp<ABuffer> buffer = new ABuffer(outLen);
+
+    uint8_t *out = buffer->data();
+    size_t j = 0;
+    uint32_t accum = 0;
+    for (size_t i = 0; i < n; ++i) {
+        char c = s.c_str()[i];
+        unsigned value;
+        if (c >= 'A' && c <= 'Z') {
+            value = c - 'A';
+        } else if (c >= 'a' && c <= 'z') {
+            value = 26 + c - 'a';
+        } else if (c >= '0' && c <= '9') {
+            value = 52 + c - '0';
+        } else if (c == '+') {
+            value = 62;
+        } else if (c == '/') {
+            value = 63;
+        } else if (c != '=') {
+            return NULL;
+        } else {
+            if (i < n - padding) {
+                return NULL;
+            }
+
+            value = 0;
+        }
+
+        accum = (accum << 6) | value;
+
+        if (((i + 1) % 4) == 0) {
+            out[j++] = (accum >> 16);
+
+            if (j < outLen) { out[j++] = (accum >> 8) & 0xff; } 
+            if (j < outLen) { out[j++] = accum & 0xff; }
+
+            accum = 0;
+        }
+    }
+
+    return buffer;
+}
+
+static char encode6Bit(unsigned x) {
+    if (x <= 25) {
+        return 'A' + x;
+    } else if (x <= 51) {
+        return 'a' + x - 26;
+    } else if (x <= 61) {
+        return '0' + x - 52;
+    } else if (x == 62) {
+        return '+';
+    } else {
+        return '/';
+    }
+}
+
+void encodeBase64(
+        const void *_data, size_t size, AString *out) {
+    out->clear();
+
+    const uint8_t *data = (const uint8_t *)_data;
+
+    size_t i;
+    for (i = 0; i < (size / 3) * 3; i += 3) {
+        uint8_t x1 = data[i];
+        uint8_t x2 = data[i + 1];
+        uint8_t x3 = data[i + 2];
+
+        out->append(encode6Bit(x1 >> 2));
+        out->append(encode6Bit((x1 << 4 | x2 >> 4) & 0x3f));
+        out->append(encode6Bit((x2 << 2 | x3 >> 6) & 0x3f));
+        out->append(encode6Bit(x3 & 0x3f));
+    }
+    switch (size % 3) {
+        case 0:
+            break;
+        case 2:
+        {
+            uint8_t x1 = data[i];
+            uint8_t x2 = data[i + 1];
+            out->append(encode6Bit(x1 >> 2));
+            out->append(encode6Bit((x1 << 4 | x2 >> 4) & 0x3f));
+            out->append(encode6Bit((x2 << 2) & 0x3f));
+            out->append('=');
+            break;
+        }
+        default:
+        {
+            uint8_t x1 = data[i];
+            out->append(encode6Bit(x1 >> 2));
+            out->append(encode6Bit((x1 << 4) & 0x3f));
+            out->append("==");
+            break;
+        }
+    }
+}
+
+}  // namespace android
diff --git a/media/libstagefright/foundation/hexdump.cpp b/media/libstagefright/foundation/hexdump.cpp
new file mode 100644
index 0000000..093b587
--- /dev/null
+++ b/media/libstagefright/foundation/hexdump.cpp
@@ -0,0 +1,73 @@
+/*
+ * 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.
+ */
+
+#include "hexdump.h"
+
+#include "ADebug.h"
+#include "AString.h"
+
+#include <ctype.h>
+#include <stdint.h>
+#include <stdio.h>
+
+namespace android {
+
+void hexdump(const void *_data, size_t size) {
+    const uint8_t *data = (const uint8_t *)_data;
+
+    size_t offset = 0;
+    while (offset < size) {
+        AString line;
+
+        char tmp[32];
+        sprintf(tmp, "%08lx:  ", (unsigned long)offset);
+
+        line.append(tmp);
+
+        for (size_t i = 0; i < 16; ++i) {
+            if (i == 8) {
+                line.append(' ');
+            }
+            if (offset + i >= size) {
+                line.append("   ");
+            } else {
+                sprintf(tmp, "%02x ", data[offset + i]);
+                line.append(tmp);
+            }
+        }
+
+        line.append(' ');
+
+        for (size_t i = 0; i < 16; ++i) {
+            if (offset + i >= size) {
+                break;
+            }
+
+            if (isprint(data[offset + i])) {
+                line.append((char)data[offset + i]);
+            } else {
+                line.append('.');
+            }
+        }
+
+        LOG(INFO) << line;
+
+        offset += 16;
+    }
+}
+
+}  // namespace android
+