Merge media files with history from frameworks/base.git

1 files changed, 2168 insertions, 0 deletions

diff --git a/media/libmediaplayerservice/MediaPlayerService.cpp b/media/libmediaplayerservice/MediaPlayerService.cpp
new file mode 100644
index 0000000..123d07f
--- /dev/null
+++ b/media/libmediaplayerservice/MediaPlayerService.cpp
@@ -0,0 +1,2168 @@
+/*
+**
+** 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.
+*/
+
+// Proxy for media player implementations
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "MediaPlayerService"
+#include <utils/Log.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <dirent.h>
+#include <unistd.h>
+
+#include <string.h>
+
+#include <cutils/atomic.h>
+#include <cutils/properties.h> // for property_get
+
+#include <utils/misc.h>
+
+#include <android_runtime/ActivityManager.h>
+
+#include <binder/IPCThreadState.h>
+#include <binder/IServiceManager.h>
+#include <binder/MemoryHeapBase.h>
+#include <binder/MemoryBase.h>
+#include <gui/SurfaceTextureClient.h>
+#include <utils/Errors.h>  // for status_t
+#include <utils/String8.h>
+#include <utils/SystemClock.h>
+#include <utils/Vector.h>
+#include <cutils/properties.h>
+
+#include <media/MediaPlayerInterface.h>
+#include <media/mediarecorder.h>
+#include <media/MediaMetadataRetrieverInterface.h>
+#include <media/Metadata.h>
+#include <media/AudioTrack.h>
+#include <media/MemoryLeakTrackUtil.h>
+#include <media/stagefright/MediaErrors.h>
+
+#include <system/audio.h>
+
+#include <private/android_filesystem_config.h>
+
+#include "MediaRecorderClient.h"
+#include "MediaPlayerService.h"
+#include "MetadataRetrieverClient.h"
+
+#include "MidiFile.h"
+#include "TestPlayerStub.h"
+#include "StagefrightPlayer.h"
+#include "nuplayer/NuPlayerDriver.h"
+
+#include <OMX.h>
+
+#include "Crypto.h"
+
+namespace android {
+sp<MediaPlayerBase> createAAH_TXPlayer();
+sp<MediaPlayerBase> createAAH_RXPlayer();
+}
+
+namespace {
+using android::media::Metadata;
+using android::status_t;
+using android::OK;
+using android::BAD_VALUE;
+using android::NOT_ENOUGH_DATA;
+using android::Parcel;
+
+// Max number of entries in the filter.
+const int kMaxFilterSize = 64;  // I pulled that out of thin air.
+
+// FIXME: Move all the metadata related function in the Metadata.cpp
+
+
+// Unmarshall a filter from a Parcel.
+// Filter format in a parcel:
+//
+//  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+// |                       number of entries (n)                   |
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+// |                       metadata type 1                         |
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+// |                       metadata type 2                         |
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+//  ....
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+// |                       metadata type n                         |
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+//
+// @param p Parcel that should start with a filter.
+// @param[out] filter On exit contains the list of metadata type to be
+//                    filtered.
+// @param[out] status On exit contains the status code to be returned.
+// @return true if the parcel starts with a valid filter.
+bool unmarshallFilter(const Parcel& p,
+                      Metadata::Filter *filter,
+                      status_t *status)
+{
+    int32_t val;
+    if (p.readInt32(&val) != OK)
+    {
+        ALOGE("Failed to read filter's length");
+        *status = NOT_ENOUGH_DATA;
+        return false;
+    }
+
+    if( val > kMaxFilterSize || val < 0)
+    {
+        ALOGE("Invalid filter len %d", val);
+        *status = BAD_VALUE;
+        return false;
+    }
+
+    const size_t num = val;
+
+    filter->clear();
+    filter->setCapacity(num);
+
+    size_t size = num * sizeof(Metadata::Type);
+
+
+    if (p.dataAvail() < size)
+    {
+        ALOGE("Filter too short expected %d but got %d", size, p.dataAvail());
+        *status = NOT_ENOUGH_DATA;
+        return false;
+    }
+
+    const Metadata::Type *data =
+            static_cast<const Metadata::Type*>(p.readInplace(size));
+
+    if (NULL == data)
+    {
+        ALOGE("Filter had no data");
+        *status = BAD_VALUE;
+        return false;
+    }
+
+    // TODO: The stl impl of vector would be more efficient here
+    // because it degenerates into a memcpy on pod types. Try to
+    // replace later or use stl::set.
+    for (size_t i = 0; i < num; ++i)
+    {
+        filter->add(*data);
+        ++data;
+    }
+    *status = OK;
+    return true;
+}
+
+// @param filter Of metadata type.
+// @param val To be searched.
+// @return true if a match was found.
+bool findMetadata(const Metadata::Filter& filter, const int32_t val)
+{
+    // Deal with empty and ANY right away
+    if (filter.isEmpty()) return false;
+    if (filter[0] == Metadata::kAny) return true;
+
+    return filter.indexOf(val) >= 0;
+}
+
+}  // anonymous namespace
+
+
+namespace android {
+
+static bool checkPermission(const char* permissionString) {
+#ifndef HAVE_ANDROID_OS
+    return true;
+#endif
+    if (getpid() == IPCThreadState::self()->getCallingPid()) return true;
+    bool ok = checkCallingPermission(String16(permissionString));
+    if (!ok) ALOGE("Request requires %s", permissionString);
+    return ok;
+}
+
+// TODO: Temp hack until we can register players
+typedef struct {
+    const char *extension;
+    const player_type playertype;
+} extmap;
+extmap FILE_EXTS [] =  {
+        {".mid", SONIVOX_PLAYER},
+        {".midi", SONIVOX_PLAYER},
+        {".smf", SONIVOX_PLAYER},
+        {".xmf", SONIVOX_PLAYER},
+        {".imy", SONIVOX_PLAYER},
+        {".rtttl", SONIVOX_PLAYER},
+        {".rtx", SONIVOX_PLAYER},
+        {".ota", SONIVOX_PLAYER},
+};
+
+// TODO: Find real cause of Audio/Video delay in PV framework and remove this workaround
+/* static */ int MediaPlayerService::AudioOutput::mMinBufferCount = 4;
+/* static */ bool MediaPlayerService::AudioOutput::mIsOnEmulator = false;
+
+void MediaPlayerService::instantiate() {
+    defaultServiceManager()->addService(
+            String16("media.player"), new MediaPlayerService());
+}
+
+MediaPlayerService::MediaPlayerService()
+{
+    ALOGV("MediaPlayerService created");
+    mNextConnId = 1;
+
+    mBatteryAudio.refCount = 0;
+    for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
+        mBatteryAudio.deviceOn[i] = 0;
+        mBatteryAudio.lastTime[i] = 0;
+        mBatteryAudio.totalTime[i] = 0;
+    }
+    // speaker is on by default
+    mBatteryAudio.deviceOn[SPEAKER] = 1;
+}
+
+MediaPlayerService::~MediaPlayerService()
+{
+    ALOGV("MediaPlayerService destroyed");
+}
+
+sp<IMediaRecorder> MediaPlayerService::createMediaRecorder(pid_t pid)
+{
+    sp<MediaRecorderClient> recorder = new MediaRecorderClient(this, pid);
+    wp<MediaRecorderClient> w = recorder;
+    Mutex::Autolock lock(mLock);
+    mMediaRecorderClients.add(w);
+    ALOGV("Create new media recorder client from pid %d", pid);
+    return recorder;
+}
+
+void MediaPlayerService::removeMediaRecorderClient(wp<MediaRecorderClient> client)
+{
+    Mutex::Autolock lock(mLock);
+    mMediaRecorderClients.remove(client);
+    ALOGV("Delete media recorder client");
+}
+
+sp<IMediaMetadataRetriever> MediaPlayerService::createMetadataRetriever(pid_t pid)
+{
+    sp<MetadataRetrieverClient> retriever = new MetadataRetrieverClient(pid);
+    ALOGV("Create new media retriever from pid %d", pid);
+    return retriever;
+}
+
+sp<IMediaPlayer> MediaPlayerService::create(pid_t pid, const sp<IMediaPlayerClient>& client,
+        int audioSessionId)
+{
+    int32_t connId = android_atomic_inc(&mNextConnId);
+
+    sp<Client> c = new Client(
+            this, pid, connId, client, audioSessionId,
+            IPCThreadState::self()->getCallingUid());
+
+    ALOGV("Create new client(%d) from pid %d, uid %d, ", connId, pid,
+         IPCThreadState::self()->getCallingUid());
+
+    wp<Client> w = c;
+    {
+        Mutex::Autolock lock(mLock);
+        mClients.add(w);
+    }
+    return c;
+}
+
+sp<IOMX> MediaPlayerService::getOMX() {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mOMX.get() == NULL) {
+        mOMX = new OMX;
+    }
+
+    return mOMX;
+}
+
+sp<ICrypto> MediaPlayerService::makeCrypto() {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mCrypto == NULL) {
+        mCrypto = new Crypto;
+    }
+
+    return mCrypto;
+}
+
+status_t MediaPlayerService::AudioCache::dump(int fd, const Vector<String16>& args) const
+{
+    const size_t SIZE = 256;
+    char buffer[SIZE];
+    String8 result;
+
+    result.append(" AudioCache\n");
+    if (mHeap != 0) {
+        snprintf(buffer, 255, "  heap base(%p), size(%d), flags(%d), device(%s)\n",
+                mHeap->getBase(), mHeap->getSize(), mHeap->getFlags(), mHeap->getDevice());
+        result.append(buffer);
+    }
+    snprintf(buffer, 255, "  msec per frame(%f), channel count(%d), format(%d), frame count(%ld)\n",
+            mMsecsPerFrame, mChannelCount, mFormat, mFrameCount);
+    result.append(buffer);
+    snprintf(buffer, 255, "  sample rate(%d), size(%d), error(%d), command complete(%s)\n",
+            mSampleRate, mSize, mError, mCommandComplete?"true":"false");
+    result.append(buffer);
+    ::write(fd, result.string(), result.size());
+    return NO_ERROR;
+}
+
+status_t MediaPlayerService::AudioOutput::dump(int fd, const Vector<String16>& args) const
+{
+    const size_t SIZE = 256;
+    char buffer[SIZE];
+    String8 result;
+
+    result.append(" AudioOutput\n");
+    snprintf(buffer, 255, "  stream type(%d), left - right volume(%f, %f)\n",
+            mStreamType, mLeftVolume, mRightVolume);
+    result.append(buffer);
+    snprintf(buffer, 255, "  msec per frame(%f), latency (%d)\n",
+            mMsecsPerFrame, (mTrack != 0) ? mTrack->latency() : -1);
+    result.append(buffer);
+    snprintf(buffer, 255, "  aux effect id(%d), send level (%f)\n",
+            mAuxEffectId, mSendLevel);
+    result.append(buffer);
+
+    ::write(fd, result.string(), result.size());
+    if (mTrack != 0) {
+        mTrack->dump(fd, args);
+    }
+    return NO_ERROR;
+}
+
+status_t MediaPlayerService::Client::dump(int fd, const Vector<String16>& args) const
+{
+    const size_t SIZE = 256;
+    char buffer[SIZE];
+    String8 result;
+    result.append(" Client\n");
+    snprintf(buffer, 255, "  pid(%d), connId(%d), status(%d), looping(%s)\n",
+            mPid, mConnId, mStatus, mLoop?"true": "false");
+    result.append(buffer);
+    write(fd, result.string(), result.size());
+    if (mPlayer != NULL) {
+        mPlayer->dump(fd, args);
+    }
+    if (mAudioOutput != 0) {
+        mAudioOutput->dump(fd, args);
+    }
+    write(fd, "\n", 1);
+    return NO_ERROR;
+}
+
+status_t MediaPlayerService::dump(int fd, const Vector<String16>& args)
+{
+    const size_t SIZE = 256;
+    char buffer[SIZE];
+    String8 result;
+    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
+        snprintf(buffer, SIZE, "Permission Denial: "
+                "can't dump MediaPlayerService from pid=%d, uid=%d\n",
+                IPCThreadState::self()->getCallingPid(),
+                IPCThreadState::self()->getCallingUid());
+        result.append(buffer);
+    } else {
+        Mutex::Autolock lock(mLock);
+        for (int i = 0, n = mClients.size(); i < n; ++i) {
+            sp<Client> c = mClients[i].promote();
+            if (c != 0) c->dump(fd, args);
+        }
+        if (mMediaRecorderClients.size() == 0) {
+                result.append(" No media recorder client\n\n");
+        } else {
+            for (int i = 0, n = mMediaRecorderClients.size(); i < n; ++i) {
+                sp<MediaRecorderClient> c = mMediaRecorderClients[i].promote();
+                if (c != 0) {
+                    snprintf(buffer, 255, " MediaRecorderClient pid(%d)\n", c->mPid);
+                    result.append(buffer);
+                    write(fd, result.string(), result.size());
+                    result = "\n";
+                    c->dump(fd, args);
+                }
+            }
+        }
+
+        result.append(" Files opened and/or mapped:\n");
+        snprintf(buffer, SIZE, "/proc/%d/maps", gettid());
+        FILE *f = fopen(buffer, "r");
+        if (f) {
+            while (!feof(f)) {
+                fgets(buffer, SIZE, f);
+                if (strstr(buffer, " /mnt/sdcard/") ||
+                    strstr(buffer, " /system/sounds/") ||
+                    strstr(buffer, " /data/") ||
+                    strstr(buffer, " /system/media/")) {
+                    result.append("  ");
+                    result.append(buffer);
+                }
+            }
+            fclose(f);
+        } else {
+            result.append("couldn't open ");
+            result.append(buffer);
+            result.append("\n");
+        }
+
+        snprintf(buffer, SIZE, "/proc/%d/fd", gettid());
+        DIR *d = opendir(buffer);
+        if (d) {
+            struct dirent *ent;
+            while((ent = readdir(d)) != NULL) {
+                if (strcmp(ent->d_name,".") && strcmp(ent->d_name,"..")) {
+                    snprintf(buffer, SIZE, "/proc/%d/fd/%s", gettid(), ent->d_name);
+                    struct stat s;
+                    if (lstat(buffer, &s) == 0) {
+                        if ((s.st_mode & S_IFMT) == S_IFLNK) {
+                            char linkto[256];
+                            int len = readlink(buffer, linkto, sizeof(linkto));
+                            if(len > 0) {
+                                if(len > 255) {
+                                    linkto[252] = '.';
+                                    linkto[253] = '.';
+                                    linkto[254] = '.';
+                                    linkto[255] = 0;
+                                } else {
+                                    linkto[len] = 0;
+                                }
+                                if (strstr(linkto, "/mnt/sdcard/") == linkto ||
+                                    strstr(linkto, "/system/sounds/") == linkto ||
+                                    strstr(linkto, "/data/") == linkto ||
+                                    strstr(linkto, "/system/media/") == linkto) {
+                                    result.append("  ");
+                                    result.append(buffer);
+                                    result.append(" -> ");
+                                    result.append(linkto);
+                                    result.append("\n");
+                                }
+                            }
+                        } else {
+                            result.append("  unexpected type for ");
+                            result.append(buffer);
+                            result.append("\n");
+                        }
+                    }
+                }
+            }
+            closedir(d);
+        } else {
+            result.append("couldn't open ");
+            result.append(buffer);
+            result.append("\n");
+        }
+
+        bool dumpMem = false;
+        for (size_t i = 0; i < args.size(); i++) {
+            if (args[i] == String16("-m")) {
+                dumpMem = true;
+            }
+        }
+        if (dumpMem) {
+            dumpMemoryAddresses(fd);
+        }
+    }
+    write(fd, result.string(), result.size());
+    return NO_ERROR;
+}
+
+void MediaPlayerService::removeClient(wp<Client> client)
+{
+    Mutex::Autolock lock(mLock);
+    mClients.remove(client);
+}
+
+MediaPlayerService::Client::Client(
+        const sp<MediaPlayerService>& service, pid_t pid,
+        int32_t connId, const sp<IMediaPlayerClient>& client,
+        int audioSessionId, uid_t uid)
+{
+    ALOGV("Client(%d) constructor", connId);
+    mPid = pid;
+    mConnId = connId;
+    mService = service;
+    mClient = client;
+    mLoop = false;
+    mStatus = NO_INIT;
+    mAudioSessionId = audioSessionId;
+    mUID = uid;
+    mRetransmitEndpointValid = false;
+
+#if CALLBACK_ANTAGONIZER
+    ALOGD("create Antagonizer");
+    mAntagonizer = new Antagonizer(notify, this);
+#endif
+}
+
+MediaPlayerService::Client::~Client()
+{
+    ALOGV("Client(%d) destructor pid = %d", mConnId, mPid);
+    mAudioOutput.clear();
+    wp<Client> client(this);
+    disconnect();
+    mService->removeClient(client);
+}
+
+void MediaPlayerService::Client::disconnect()
+{
+    ALOGV("disconnect(%d) from pid %d", mConnId, mPid);
+    // grab local reference and clear main reference to prevent future
+    // access to object
+    sp<MediaPlayerBase> p;
+    {
+        Mutex::Autolock l(mLock);
+        p = mPlayer;
+    }
+    mClient.clear();
+
+    mPlayer.clear();
+
+    // clear the notification to prevent callbacks to dead client
+    // and reset the player. We assume the player will serialize
+    // access to itself if necessary.
+    if (p != 0) {
+        p->setNotifyCallback(0, 0);
+#if CALLBACK_ANTAGONIZER
+        ALOGD("kill Antagonizer");
+        mAntagonizer->kill();
+#endif
+        p->reset();
+    }
+
+    disconnectNativeWindow();
+
+    IPCThreadState::self()->flushCommands();
+}
+
+static player_type getDefaultPlayerType() {
+    char value[PROPERTY_VALUE_MAX];
+    if (property_get("media.stagefright.use-nuplayer", value, NULL)
+            && (!strcmp("1", value) || !strcasecmp("true", value))) {
+        return NU_PLAYER;
+    }
+
+    return STAGEFRIGHT_PLAYER;
+}
+
+player_type getPlayerType(int fd, int64_t offset, int64_t length)
+{
+    char buf[20];
+    lseek(fd, offset, SEEK_SET);
+    read(fd, buf, sizeof(buf));
+    lseek(fd, offset, SEEK_SET);
+
+    long ident = *((long*)buf);
+
+    // Ogg vorbis?
+    if (ident == 0x5367674f) // 'OggS'
+        return STAGEFRIGHT_PLAYER;
+
+    // Some kind of MIDI?
+    EAS_DATA_HANDLE easdata;
+    if (EAS_Init(&easdata) == EAS_SUCCESS) {
+        EAS_FILE locator;
+        locator.path = NULL;
+        locator.fd = fd;
+        locator.offset = offset;
+        locator.length = length;
+        EAS_HANDLE  eashandle;
+        if (EAS_OpenFile(easdata, &locator, &eashandle) == EAS_SUCCESS) {
+            EAS_CloseFile(easdata, eashandle);
+            EAS_Shutdown(easdata);
+            return SONIVOX_PLAYER;
+        }
+        EAS_Shutdown(easdata);
+    }
+
+    return getDefaultPlayerType();
+}
+
+player_type getPlayerType(const char* url)
+{
+    if (TestPlayerStub::canBeUsed(url)) {
+        return TEST_PLAYER;
+    }
+
+    if (!strncasecmp("http://", url, 7)
+            || !strncasecmp("https://", url, 8)) {
+        size_t len = strlen(url);
+        if (len >= 5 && !strcasecmp(".m3u8", &url[len - 5])) {
+            return NU_PLAYER;
+        }
+
+        if (strstr(url,"m3u8")) {
+            return NU_PLAYER;
+        }
+    }
+
+    if (!strncasecmp("rtsp://", url, 7)) {
+        return NU_PLAYER;
+    }
+
+    if (!strncasecmp("aahRX://", url, 8)) {
+        return AAH_RX_PLAYER;
+    }
+
+    // use MidiFile for MIDI extensions
+    int lenURL = strlen(url);
+    for (int i = 0; i < NELEM(FILE_EXTS); ++i) {
+        int len = strlen(FILE_EXTS[i].extension);
+        int start = lenURL - len;
+        if (start > 0) {
+            if (!strncasecmp(url + start, FILE_EXTS[i].extension, len)) {
+                return FILE_EXTS[i].playertype;
+            }
+        }
+    }
+
+    return getDefaultPlayerType();
+}
+
+player_type MediaPlayerService::Client::getPlayerType(int fd,
+                                                      int64_t offset,
+                                                      int64_t length)
+{
+    // Until re-transmit functionality is added to the existing core android
+    // players, we use the special AAH TX player whenever we were configured
+    // for retransmission.
+    if (mRetransmitEndpointValid) {
+        return AAH_TX_PLAYER;
+    }
+
+    return android::getPlayerType(fd, offset, length);
+}
+
+player_type MediaPlayerService::Client::getPlayerType(const char* url)
+{
+    // Until re-transmit functionality is added to the existing core android
+    // players, we use the special AAH TX player whenever we were configured
+    // for retransmission.
+    if (mRetransmitEndpointValid) {
+        return AAH_TX_PLAYER;
+    }
+
+    return android::getPlayerType(url);
+}
+
+player_type MediaPlayerService::Client::getPlayerType(
+        const sp<IStreamSource> &source) {
+    // Until re-transmit functionality is added to the existing core android
+    // players, we use the special AAH TX player whenever we were configured
+    // for retransmission.
+    if (mRetransmitEndpointValid) {
+        return AAH_TX_PLAYER;
+    }
+
+    return NU_PLAYER;
+}
+
+static sp<MediaPlayerBase> createPlayer(player_type playerType, void* cookie,
+        notify_callback_f notifyFunc)
+{
+    sp<MediaPlayerBase> p;
+    switch (playerType) {
+        case SONIVOX_PLAYER:
+            ALOGV(" create MidiFile");
+            p = new MidiFile();
+            break;
+        case STAGEFRIGHT_PLAYER:
+            ALOGV(" create StagefrightPlayer");
+            p = new StagefrightPlayer;
+            break;
+        case NU_PLAYER:
+            ALOGV(" create NuPlayer");
+            p = new NuPlayerDriver;
+            break;
+        case TEST_PLAYER:
+            ALOGV("Create Test Player stub");
+            p = new TestPlayerStub();
+            break;
+        case AAH_RX_PLAYER:
+            ALOGV(" create A@H RX Player");
+            p = createAAH_RXPlayer();
+            break;
+        case AAH_TX_PLAYER:
+            ALOGV(" create A@H TX Player");
+            p = createAAH_TXPlayer();
+            break;
+        default:
+            ALOGE("Unknown player type: %d", playerType);
+            return NULL;
+    }
+    if (p != NULL) {
+        if (p->initCheck() == NO_ERROR) {
+            p->setNotifyCallback(cookie, notifyFunc);
+        } else {
+            p.clear();
+        }
+    }
+    if (p == NULL) {
+        ALOGE("Failed to create player object");
+    }
+    return p;
+}
+
+sp<MediaPlayerBase> MediaPlayerService::Client::createPlayer(player_type playerType)
+{
+    // determine if we have the right player type
+    sp<MediaPlayerBase> p = mPlayer;
+    if ((p != NULL) && (p->playerType() != playerType)) {
+        ALOGV("delete player");
+        p.clear();
+    }
+    if (p == NULL) {
+        p = android::createPlayer(playerType, this, notify);
+    }
+
+    if (p != NULL) {
+        p->setUID(mUID);
+    }
+
+    return p;
+}
+
+sp<MediaPlayerBase> MediaPlayerService::Client::setDataSource_pre(
+        player_type playerType)
+{
+    ALOGV("player type = %d", playerType);
+
+    // create the right type of player
+    sp<MediaPlayerBase> p = createPlayer(playerType);
+    if (p == NULL) {
+        return p;
+    }
+
+    if (!p->hardwareOutput()) {
+        mAudioOutput = new AudioOutput(mAudioSessionId);
+        static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
+    }
+
+    return p;
+}
+
+void MediaPlayerService::Client::setDataSource_post(
+        const sp<MediaPlayerBase>& p,
+        status_t status)
+{
+    ALOGV(" setDataSource");
+    mStatus = status;
+    if (mStatus != OK) {
+        ALOGE("  error: %d", mStatus);
+        return;
+    }
+
+    // Set the re-transmission endpoint if one was chosen.
+    if (mRetransmitEndpointValid) {
+        mStatus = p->setRetransmitEndpoint(&mRetransmitEndpoint);
+        if (mStatus != NO_ERROR) {
+            ALOGE("setRetransmitEndpoint error: %d", mStatus);
+        }
+    }
+
+    if (mStatus == OK) {
+        mPlayer = p;
+    }
+}
+
+status_t MediaPlayerService::Client::setDataSource(
+        const char *url, const KeyedVector<String8, String8> *headers)
+{
+    ALOGV("setDataSource(%s)", url);
+    if (url == NULL)
+        return UNKNOWN_ERROR;
+
+    if ((strncmp(url, "http://", 7) == 0) ||
+        (strncmp(url, "https://", 8) == 0) ||
+        (strncmp(url, "rtsp://", 7) == 0)) {
+        if (!checkPermission("android.permission.INTERNET")) {
+            return PERMISSION_DENIED;
+        }
+    }
+
+    if (strncmp(url, "content://", 10) == 0) {
+        // get a filedescriptor for the content Uri and
+        // pass it to the setDataSource(fd) method
+
+        String16 url16(url);
+        int fd = android::openContentProviderFile(url16);
+        if (fd < 0)
+        {
+            ALOGE("Couldn't open fd for %s", url);
+            return UNKNOWN_ERROR;
+        }
+        setDataSource(fd, 0, 0x7fffffffffLL); // this sets mStatus
+        close(fd);
+        return mStatus;
+    } else {
+        player_type playerType = getPlayerType(url);
+        sp<MediaPlayerBase> p = setDataSource_pre(playerType);
+        if (p == NULL) {
+            return NO_INIT;
+        }
+
+        setDataSource_post(p, p->setDataSource(url, headers));
+        return mStatus;
+    }
+}
+
+status_t MediaPlayerService::Client::setDataSource(int fd, int64_t offset, int64_t length)
+{
+    ALOGV("setDataSource fd=%d, offset=%lld, length=%lld", fd, offset, length);
+    struct stat sb;
+    int ret = fstat(fd, &sb);
+    if (ret != 0) {
+        ALOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
+        return UNKNOWN_ERROR;
+    }
+
+    ALOGV("st_dev  = %llu", sb.st_dev);
+    ALOGV("st_mode = %u", sb.st_mode);
+    ALOGV("st_uid  = %lu", sb.st_uid);
+    ALOGV("st_gid  = %lu", sb.st_gid);
+    ALOGV("st_size = %llu", sb.st_size);
+
+    if (offset >= sb.st_size) {
+        ALOGE("offset error");
+        ::close(fd);
+        return UNKNOWN_ERROR;
+    }
+    if (offset + length > sb.st_size) {
+        length = sb.st_size - offset;
+        ALOGV("calculated length = %lld", length);
+    }
+
+    // Until re-transmit functionality is added to the existing core android
+    // players, we use the special AAH TX player whenever we were configured for
+    // retransmission.
+    player_type playerType = getPlayerType(fd, offset, length);
+    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
+    if (p == NULL) {
+        return NO_INIT;
+    }
+
+    // now set data source
+    setDataSource_post(p, p->setDataSource(fd, offset, length));
+    return mStatus;
+}
+
+status_t MediaPlayerService::Client::setDataSource(
+        const sp<IStreamSource> &source) {
+    // create the right type of player
+    // Until re-transmit functionality is added to the existing core android
+    // players, we use the special AAH TX player whenever we were configured for
+    // retransmission.
+    player_type playerType = getPlayerType(source);
+    sp<MediaPlayerBase> p = setDataSource_pre(playerType);
+    if (p == NULL) {
+        return NO_INIT;
+    }
+
+    // now set data source
+    setDataSource_post(p, p->setDataSource(source));
+    return mStatus;
+}
+
+void MediaPlayerService::Client::disconnectNativeWindow() {
+    if (mConnectedWindow != NULL) {
+        status_t err = native_window_api_disconnect(mConnectedWindow.get(),
+                NATIVE_WINDOW_API_MEDIA);
+
+        if (err != OK) {
+            ALOGW("native_window_api_disconnect returned an error: %s (%d)",
+                    strerror(-err), err);
+        }
+    }
+    mConnectedWindow.clear();
+}
+
+status_t MediaPlayerService::Client::setVideoSurfaceTexture(
+        const sp<ISurfaceTexture>& surfaceTexture)
+{
+    ALOGV("[%d] setVideoSurfaceTexture(%p)", mConnId, surfaceTexture.get());
+    sp<MediaPlayerBase> p = getPlayer();
+    if (p == 0) return UNKNOWN_ERROR;
+
+    sp<IBinder> binder(surfaceTexture == NULL ? NULL :
+            surfaceTexture->asBinder());
+    if (mConnectedWindowBinder == binder) {
+        return OK;
+    }
+
+    sp<ANativeWindow> anw;
+    if (surfaceTexture != NULL) {
+        anw = new SurfaceTextureClient(surfaceTexture);
+        status_t err = native_window_api_connect(anw.get(),
+                NATIVE_WINDOW_API_MEDIA);
+
+        if (err != OK) {
+            ALOGE("setVideoSurfaceTexture failed: %d", err);
+            // Note that we must do the reset before disconnecting from the ANW.
+            // Otherwise queue/dequeue calls could be made on the disconnected
+            // ANW, which may result in errors.
+            reset();
+
+            disconnectNativeWindow();
+
+            return err;
+        }
+    }
+
+    // Note that we must set the player's new SurfaceTexture before
+    // disconnecting the old one.  Otherwise queue/dequeue calls could be made
+    // on the disconnected ANW, which may result in errors.
+    status_t err = p->setVideoSurfaceTexture(surfaceTexture);
+
+    disconnectNativeWindow();
+
+    mConnectedWindow = anw;
+
+    if (err == OK) {
+        mConnectedWindowBinder = binder;
+    } else {
+        disconnectNativeWindow();
+    }
+
+    return err;
+}
+
+status_t MediaPlayerService::Client::invoke(const Parcel& request,
+                                            Parcel *reply)
+{
+    sp<MediaPlayerBase> p = getPlayer();
+    if (p == NULL) return UNKNOWN_ERROR;
+    return p->invoke(request, reply);
+}
+
+// This call doesn't need to access the native player.
+status_t MediaPlayerService::Client::setMetadataFilter(const Parcel& filter)
+{
+    status_t status;
+    media::Metadata::Filter allow, drop;
+
+    if (unmarshallFilter(filter, &allow, &status) &&
+        unmarshallFilter(filter, &drop, &status)) {
+        Mutex::Autolock lock(mLock);
+
+        mMetadataAllow = allow;
+        mMetadataDrop = drop;
+    }
+    return status;
+}
+
+status_t MediaPlayerService::Client::getMetadata(
+        bool update_only, bool apply_filter, Parcel *reply)
+{
+    sp<MediaPlayerBase> player = getPlayer();
+    if (player == 0) return UNKNOWN_ERROR;
+
+    status_t status;
+    // Placeholder for the return code, updated by the caller.
+    reply->writeInt32(-1);
+
+    media::Metadata::Filter ids;
+
+    // We don't block notifications while we fetch the data. We clear
+    // mMetadataUpdated first so we don't lose notifications happening
+    // during the rest of this call.
+    {
+        Mutex::Autolock lock(mLock);
+        if (update_only) {
+            ids = mMetadataUpdated;
+        }
+        mMetadataUpdated.clear();
+    }
+
+    media::Metadata metadata(reply);
+
+    metadata.appendHeader();
+    status = player->getMetadata(ids, reply);
+
+    if (status != OK) {
+        metadata.resetParcel();
+        ALOGE("getMetadata failed %d", status);
+        return status;
+    }
+
+    // FIXME: Implement filtering on the result. Not critical since
+    // filtering takes place on the update notifications already. This
+    // would be when all the metadata are fetch and a filter is set.
+
+    // Everything is fine, update the metadata length.
+    metadata.updateLength();
+    return OK;
+}
+
+status_t MediaPlayerService::Client::prepareAsync()
+{
+    ALOGV("[%d] prepareAsync", mConnId);
+    sp<MediaPlayerBase> p = getPlayer();
+    if (p == 0) return UNKNOWN_ERROR;
+    status_t ret = p->prepareAsync();
+#if CALLBACK_ANTAGONIZER
+    ALOGD("start Antagonizer");
+    if (ret == NO_ERROR) mAntagonizer->start();
+#endif
+    return ret;
+}
+
+status_t MediaPlayerService::Client::start()
+{
+    ALOGV("[%d] start", mConnId);
+    sp<MediaPlayerBase> p = getPlayer();
+    if (p == 0) return UNKNOWN_ERROR;
+    p->setLooping(mLoop);
+    return p->start();
+}
+
+status_t MediaPlayerService::Client::stop()
+{
+    ALOGV("[%d] stop", mConnId);
+    sp<MediaPlayerBase> p = getPlayer();
+    if (p == 0) return UNKNOWN_ERROR;
+    return p->stop();
+}
+
+status_t MediaPlayerService::Client::pause()
+{
+    ALOGV("[%d] pause", mConnId);
+    sp<MediaPlayerBase> p = getPlayer();
+    if (p == 0) return UNKNOWN_ERROR;
+    return p->pause();
+}
+
+status_t MediaPlayerService::Client::isPlaying(bool* state)
+{
+    *state = false;
+    sp<MediaPlayerBase> p = getPlayer();
+    if (p == 0) return UNKNOWN_ERROR;
+    *state = p->isPlaying();
+    ALOGV("[%d] isPlaying: %d", mConnId, *state);
+    return NO_ERROR;
+}
+
+status_t MediaPlayerService::Client::getCurrentPosition(int *msec)
+{
+    ALOGV("getCurrentPosition");
+    sp<MediaPlayerBase> p = getPlayer();
+    if (p == 0) return UNKNOWN_ERROR;
+    status_t ret = p->getCurrentPosition(msec);
+    if (ret == NO_ERROR) {
+        ALOGV("[%d] getCurrentPosition = %d", mConnId, *msec);
+    } else {
+        ALOGE("getCurrentPosition returned %d", ret);
+    }
+    return ret;
+}
+
+status_t MediaPlayerService::Client::getDuration(int *msec)
+{
+    ALOGV("getDuration");
+    sp<MediaPlayerBase> p = getPlayer();
+    if (p == 0) return UNKNOWN_ERROR;
+    status_t ret = p->getDuration(msec);
+    if (ret == NO_ERROR) {
+        ALOGV("[%d] getDuration = %d", mConnId, *msec);
+    } else {
+        ALOGE("getDuration returned %d", ret);
+    }
+    return ret;
+}
+
+status_t MediaPlayerService::Client::setNextPlayer(const sp<IMediaPlayer>& player) {
+    ALOGV("setNextPlayer");
+    Mutex::Autolock l(mLock);
+    sp<Client> c = static_cast<Client*>(player.get());
+    mNextClient = c;
+    if (mAudioOutput != NULL && c != NULL) {
+        mAudioOutput->setNextOutput(c->mAudioOutput);
+    } else {
+        ALOGE("no current audio output");
+    }
+    return OK;
+}
+
+
+status_t MediaPlayerService::Client::seekTo(int msec)
+{
+    ALOGV("[%d] seekTo(%d)", mConnId, msec);
+    sp<MediaPlayerBase> p = getPlayer();
+    if (p == 0) return UNKNOWN_ERROR;
+    return p->seekTo(msec);
+}
+
+status_t MediaPlayerService::Client::reset()
+{
+    ALOGV("[%d] reset", mConnId);
+    mRetransmitEndpointValid = false;
+    sp<MediaPlayerBase> p = getPlayer();
+    if (p == 0) return UNKNOWN_ERROR;
+    return p->reset();
+}
+
+status_t MediaPlayerService::Client::setAudioStreamType(audio_stream_type_t type)
+{
+    ALOGV("[%d] setAudioStreamType(%d)", mConnId, type);
+    // TODO: for hardware output, call player instead
+    Mutex::Autolock l(mLock);
+    if (mAudioOutput != 0) mAudioOutput->setAudioStreamType(type);
+    return NO_ERROR;
+}
+
+status_t MediaPlayerService::Client::setLooping(int loop)
+{
+    ALOGV("[%d] setLooping(%d)", mConnId, loop);
+    mLoop = loop;
+    sp<MediaPlayerBase> p = getPlayer();
+    if (p != 0) return p->setLooping(loop);
+    return NO_ERROR;
+}
+
+status_t MediaPlayerService::Client::setVolume(float leftVolume, float rightVolume)
+{
+    ALOGV("[%d] setVolume(%f, %f)", mConnId, leftVolume, rightVolume);
+
+    // for hardware output, call player instead
+    sp<MediaPlayerBase> p = getPlayer();
+    {
+      Mutex::Autolock l(mLock);
+      if (p != 0 && p->hardwareOutput()) {
+          MediaPlayerHWInterface* hwp =
+                  reinterpret_cast<MediaPlayerHWInterface*>(p.get());
+          return hwp->setVolume(leftVolume, rightVolume);
+      } else {
+          if (mAudioOutput != 0) mAudioOutput->setVolume(leftVolume, rightVolume);
+          return NO_ERROR;
+      }
+    }
+
+    return NO_ERROR;
+}
+
+status_t MediaPlayerService::Client::setAuxEffectSendLevel(float level)
+{
+    ALOGV("[%d] setAuxEffectSendLevel(%f)", mConnId, level);
+    Mutex::Autolock l(mLock);
+    if (mAudioOutput != 0) return mAudioOutput->setAuxEffectSendLevel(level);
+    return NO_ERROR;
+}
+
+status_t MediaPlayerService::Client::attachAuxEffect(int effectId)
+{
+    ALOGV("[%d] attachAuxEffect(%d)", mConnId, effectId);
+    Mutex::Autolock l(mLock);
+    if (mAudioOutput != 0) return mAudioOutput->attachAuxEffect(effectId);
+    return NO_ERROR;
+}
+
+status_t MediaPlayerService::Client::setParameter(int key, const Parcel &request) {
+    ALOGV("[%d] setParameter(%d)", mConnId, key);
+    sp<MediaPlayerBase> p = getPlayer();
+    if (p == 0) return UNKNOWN_ERROR;
+    return p->setParameter(key, request);
+}
+
+status_t MediaPlayerService::Client::getParameter(int key, Parcel *reply) {
+    ALOGV("[%d] getParameter(%d)", mConnId, key);
+    sp<MediaPlayerBase> p = getPlayer();
+    if (p == 0) return UNKNOWN_ERROR;
+    return p->getParameter(key, reply);
+}
+
+status_t MediaPlayerService::Client::setRetransmitEndpoint(
+        const struct sockaddr_in* endpoint) {
+
+    if (NULL != endpoint) {
+        uint32_t a = ntohl(endpoint->sin_addr.s_addr);
+        uint16_t p = ntohs(endpoint->sin_port);
+        ALOGV("[%d] setRetransmitEndpoint(%u.%u.%u.%u:%hu)", mConnId,
+                (a >> 24), (a >> 16) & 0xFF, (a >> 8) & 0xFF, (a & 0xFF), p);
+    } else {
+        ALOGV("[%d] setRetransmitEndpoint = <none>", mConnId);
+    }
+
+    sp<MediaPlayerBase> p = getPlayer();
+
+    // Right now, the only valid time to set a retransmit endpoint is before
+    // player selection has been made (since the presence or absence of a
+    // retransmit endpoint is going to determine which player is selected during
+    // setDataSource).
+    if (p != 0) return INVALID_OPERATION;
+
+    if (NULL != endpoint) {
+        mRetransmitEndpoint = *endpoint;
+        mRetransmitEndpointValid = true;
+    } else {
+        mRetransmitEndpointValid = false;
+    }
+
+    return NO_ERROR;
+}
+
+void MediaPlayerService::Client::notify(
+        void* cookie, int msg, int ext1, int ext2, const Parcel *obj)
+{
+    Client* client = static_cast<Client*>(cookie);
+
+    {
+        Mutex::Autolock l(client->mLock);
+        if (msg == MEDIA_PLAYBACK_COMPLETE && client->mNextClient != NULL) {
+            client->mAudioOutput->switchToNextOutput();
+            client->mNextClient->start();
+            client->mNextClient->mClient->notify(MEDIA_INFO, MEDIA_INFO_STARTED_AS_NEXT, 0, obj);
+        }
+    }
+
+    if (MEDIA_INFO == msg &&
+        MEDIA_INFO_METADATA_UPDATE == ext1) {
+        const media::Metadata::Type metadata_type = ext2;
+
+        if(client->shouldDropMetadata(metadata_type)) {
+            return;
+        }
+
+        // Update the list of metadata that have changed. getMetadata
+        // also access mMetadataUpdated and clears it.
+        client->addNewMetadataUpdate(metadata_type);
+    }
+    ALOGV("[%d] notify (%p, %d, %d, %d)", client->mConnId, cookie, msg, ext1, ext2);
+    client->mClient->notify(msg, ext1, ext2, obj);
+}
+
+
+bool MediaPlayerService::Client::shouldDropMetadata(media::Metadata::Type code) const
+{
+    Mutex::Autolock lock(mLock);
+
+    if (findMetadata(mMetadataDrop, code)) {
+        return true;
+    }
+
+    if (mMetadataAllow.isEmpty() || findMetadata(mMetadataAllow, code)) {
+        return false;
+    } else {
+        return true;
+    }
+}
+
+
+void MediaPlayerService::Client::addNewMetadataUpdate(media::Metadata::Type metadata_type) {
+    Mutex::Autolock lock(mLock);
+    if (mMetadataUpdated.indexOf(metadata_type) < 0) {
+        mMetadataUpdated.add(metadata_type);
+    }
+}
+
+#if CALLBACK_ANTAGONIZER
+const int Antagonizer::interval = 10000; // 10 msecs
+
+Antagonizer::Antagonizer(notify_callback_f cb, void* client) :
+    mExit(false), mActive(false), mClient(client), mCb(cb)
+{
+    createThread(callbackThread, this);
+}
+
+void Antagonizer::kill()
+{
+    Mutex::Autolock _l(mLock);
+    mActive = false;
+    mExit = true;
+    mCondition.wait(mLock);
+}
+
+int Antagonizer::callbackThread(void* user)
+{
+    ALOGD("Antagonizer started");
+    Antagonizer* p = reinterpret_cast<Antagonizer*>(user);
+    while (!p->mExit) {
+        if (p->mActive) {
+            ALOGV("send event");
+            p->mCb(p->mClient, 0, 0, 0);
+        }
+        usleep(interval);
+    }
+    Mutex::Autolock _l(p->mLock);
+    p->mCondition.signal();
+    ALOGD("Antagonizer stopped");
+    return 0;
+}
+#endif
+
+static size_t kDefaultHeapSize = 1024 * 1024; // 1MB
+
+sp<IMemory> MediaPlayerService::decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, audio_format_t* pFormat)
+{
+    ALOGV("decode(%s)", url);
+    sp<MemoryBase> mem;
+    sp<MediaPlayerBase> player;
+
+    // Protect our precious, precious DRMd ringtones by only allowing
+    // decoding of http, but not filesystem paths or content Uris.
+    // If the application wants to decode those, it should open a
+    // filedescriptor for them and use that.
+    if (url != NULL && strncmp(url, "http://", 7) != 0) {
+        ALOGD("Can't decode %s by path, use filedescriptor instead", url);
+        return mem;
+    }
+
+    player_type playerType = getPlayerType(url);
+    ALOGV("player type = %d", playerType);
+
+    // create the right type of player
+    sp<AudioCache> cache = new AudioCache(url);
+    player = android::createPlayer(playerType, cache.get(), cache->notify);
+    if (player == NULL) goto Exit;
+    if (player->hardwareOutput()) goto Exit;
+
+    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
+
+    // set data source
+    if (player->setDataSource(url) != NO_ERROR) goto Exit;
+
+    ALOGV("prepare");
+    player->prepareAsync();
+
+    ALOGV("wait for prepare");
+    if (cache->wait() != NO_ERROR) goto Exit;
+
+    ALOGV("start");
+    player->start();
+
+    ALOGV("wait for playback complete");
+    cache->wait();
+    // in case of error, return what was successfully decoded.
+    if (cache->size() == 0) {
+        goto Exit;
+    }
+
+    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
+    *pSampleRate = cache->sampleRate();
+    *pNumChannels = cache->channelCount();
+    *pFormat = cache->format();
+    ALOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
+
+Exit:
+    if (player != 0) player->reset();
+    return mem;
+}
+
+sp<IMemory> MediaPlayerService::decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, audio_format_t* pFormat)
+{
+    ALOGV("decode(%d, %lld, %lld)", fd, offset, length);
+    sp<MemoryBase> mem;
+    sp<MediaPlayerBase> player;
+
+    player_type playerType = getPlayerType(fd, offset, length);
+    ALOGV("player type = %d", playerType);
+
+    // create the right type of player
+    sp<AudioCache> cache = new AudioCache("decode_fd");
+    player = android::createPlayer(playerType, cache.get(), cache->notify);
+    if (player == NULL) goto Exit;
+    if (player->hardwareOutput()) goto Exit;
+
+    static_cast<MediaPlayerInterface*>(player.get())->setAudioSink(cache);
+
+    // set data source
+    if (player->setDataSource(fd, offset, length) != NO_ERROR) goto Exit;
+
+    ALOGV("prepare");
+    player->prepareAsync();
+
+    ALOGV("wait for prepare");
+    if (cache->wait() != NO_ERROR) goto Exit;
+
+    ALOGV("start");
+    player->start();
+
+    ALOGV("wait for playback complete");
+    cache->wait();
+    // in case of error, return what was successfully decoded.
+    if (cache->size() == 0) {
+        goto Exit;
+    }
+
+    mem = new MemoryBase(cache->getHeap(), 0, cache->size());
+    *pSampleRate = cache->sampleRate();
+    *pNumChannels = cache->channelCount();
+    *pFormat = cache->format();
+    ALOGV("return memory @ %p, sampleRate=%u, channelCount = %d, format = %d", mem->pointer(), *pSampleRate, *pNumChannels, *pFormat);
+
+Exit:
+    if (player != 0) player->reset();
+    ::close(fd);
+    return mem;
+}
+
+
+#undef LOG_TAG
+#define LOG_TAG "AudioSink"
+MediaPlayerService::AudioOutput::AudioOutput(int sessionId)
+    : mCallback(NULL),
+      mCallbackCookie(NULL),
+      mCallbackData(NULL),
+      mSessionId(sessionId) {
+    ALOGV("AudioOutput(%d)", sessionId);
+    mTrack = 0;
+    mRecycledTrack = 0;
+    mStreamType = AUDIO_STREAM_MUSIC;
+    mLeftVolume = 1.0;
+    mRightVolume = 1.0;
+    mPlaybackRatePermille = 1000;
+    mSampleRateHz = 0;
+    mMsecsPerFrame = 0;
+    mAuxEffectId = 0;
+    mSendLevel = 0.0;
+    setMinBufferCount();
+}
+
+MediaPlayerService::AudioOutput::~AudioOutput()
+{
+    close();
+    delete mRecycledTrack;
+    delete mCallbackData;
+}
+
+void MediaPlayerService::AudioOutput::setMinBufferCount()
+{
+    char value[PROPERTY_VALUE_MAX];
+    if (property_get("ro.kernel.qemu", value, 0)) {
+        mIsOnEmulator = true;
+        mMinBufferCount = 12;  // to prevent systematic buffer underrun for emulator
+    }
+}
+
+bool MediaPlayerService::AudioOutput::isOnEmulator()
+{
+    setMinBufferCount();
+    return mIsOnEmulator;
+}
+
+int MediaPlayerService::AudioOutput::getMinBufferCount()
+{
+    setMinBufferCount();
+    return mMinBufferCount;
+}
+
+ssize_t MediaPlayerService::AudioOutput::bufferSize() const
+{
+    if (mTrack == 0) return NO_INIT;
+    return mTrack->frameCount() * frameSize();
+}
+
+ssize_t MediaPlayerService::AudioOutput::frameCount() const
+{
+    if (mTrack == 0) return NO_INIT;
+    return mTrack->frameCount();
+}
+
+ssize_t MediaPlayerService::AudioOutput::channelCount() const
+{
+    if (mTrack == 0) return NO_INIT;
+    return mTrack->channelCount();
+}
+
+ssize_t MediaPlayerService::AudioOutput::frameSize() const
+{
+    if (mTrack == 0) return NO_INIT;
+    return mTrack->frameSize();
+}
+
+uint32_t MediaPlayerService::AudioOutput::latency () const
+{
+    if (mTrack == 0) return 0;
+    return mTrack->latency();
+}
+
+float MediaPlayerService::AudioOutput::msecsPerFrame() const
+{
+    return mMsecsPerFrame;
+}
+
+status_t MediaPlayerService::AudioOutput::getPosition(uint32_t *position)
+{
+    if (mTrack == 0) return NO_INIT;
+    return mTrack->getPosition(position);
+}
+
+status_t MediaPlayerService::AudioOutput::open(
+        uint32_t sampleRate, int channelCount, audio_channel_mask_t channelMask,
+        audio_format_t format, int bufferCount,
+        AudioCallback cb, void *cookie)
+{
+    mCallback = cb;
+    mCallbackCookie = cookie;
+
+    // Check argument "bufferCount" against the mininum buffer count
+    if (bufferCount < mMinBufferCount) {
+        ALOGD("bufferCount (%d) is too small and increased to %d", bufferCount, mMinBufferCount);
+        bufferCount = mMinBufferCount;
+
+    }
+    ALOGV("open(%u, %d, 0x%x, %d, %d, %d)", sampleRate, channelCount, channelMask,
+            format, bufferCount, mSessionId);
+    int afSampleRate;
+    int afFrameCount;
+    int frameCount;
+
+    if (AudioSystem::getOutputFrameCount(&afFrameCount, mStreamType) != NO_ERROR) {
+        return NO_INIT;
+    }
+    if (AudioSystem::getOutputSamplingRate(&afSampleRate, mStreamType) != NO_ERROR) {
+        return NO_INIT;
+    }
+
+    frameCount = (sampleRate*afFrameCount*bufferCount)/afSampleRate;
+
+    if (channelMask == CHANNEL_MASK_USE_CHANNEL_ORDER) {
+        channelMask = audio_channel_out_mask_from_count(channelCount);
+        if (0 == channelMask) {
+            ALOGE("open() error, can\'t derive mask for %d audio channels", channelCount);
+            return NO_INIT;
+        }
+    }
+    if (mRecycledTrack) {
+        // check if the existing track can be reused as-is, or if a new track needs to be created.
+
+        bool reuse = true;
+        if ((mCallbackData == NULL && mCallback != NULL) ||
+                (mCallbackData != NULL && mCallback == NULL)) {
+            // recycled track uses callbacks but the caller wants to use writes, or vice versa
+            ALOGV("can't chain callback and write");
+            reuse = false;
+        } else if ((mRecycledTrack->getSampleRate() != sampleRate) ||
+                (mRecycledTrack->channelCount() != channelCount) ||
+                (mRecycledTrack->frameCount() != frameCount)) {
+            ALOGV("samplerate, channelcount or framecount differ");
+            reuse = false;
+        }
+        if (reuse) {
+            ALOGV("chaining to next output");
+            close();
+            mTrack = mRecycledTrack;
+            mRecycledTrack = NULL;
+            if (mCallbackData != NULL) {
+                mCallbackData->setOutput(this);
+            }
+            return OK;
+        }
+
+        // if we're not going to reuse the track, unblock and flush it
+        if (mCallbackData != NULL) {
+            mCallbackData->setOutput(NULL);
+            mCallbackData->endTrackSwitch();
+        }
+        mRecycledTrack->flush();
+        delete mRecycledTrack;
+        mRecycledTrack = NULL;
+        delete mCallbackData;
+        mCallbackData = NULL;
+        close();
+    }
+
+    AudioTrack *t;
+    if (mCallback != NULL) {
+        mCallbackData = new CallbackData(this);
+        t = new AudioTrack(
+                mStreamType,
+                sampleRate,
+                format,
+                channelMask,
+                frameCount,
+                AUDIO_POLICY_OUTPUT_FLAG_NONE,
+                CallbackWrapper,
+                mCallbackData,
+                0,  // notification frames
+                mSessionId);
+    } else {
+        t = new AudioTrack(
+                mStreamType,
+                sampleRate,
+                format,
+                channelMask,
+                frameCount,
+                AUDIO_POLICY_OUTPUT_FLAG_NONE,
+                NULL,
+                NULL,
+                0,
+                mSessionId);
+    }
+
+    if ((t == 0) || (t->initCheck() != NO_ERROR)) {
+        ALOGE("Unable to create audio track");
+        delete t;
+        return NO_INIT;
+    }
+
+    ALOGV("setVolume");
+    t->setVolume(mLeftVolume, mRightVolume);
+
+    mSampleRateHz = sampleRate;
+    mMsecsPerFrame = mPlaybackRatePermille / (float) sampleRate;
+    mTrack = t;
+
+    status_t res = t->setSampleRate(mPlaybackRatePermille * mSampleRateHz / 1000);
+    if (res != NO_ERROR) {
+        return res;
+    }
+    t->setAuxEffectSendLevel(mSendLevel);
+    return t->attachAuxEffect(mAuxEffectId);;
+}
+
+void MediaPlayerService::AudioOutput::start()
+{
+    ALOGV("start");
+    if (mCallbackData != NULL) {
+        mCallbackData->endTrackSwitch();
+    }
+    if (mTrack) {
+        mTrack->setVolume(mLeftVolume, mRightVolume);
+        mTrack->setAuxEffectSendLevel(mSendLevel);
+        mTrack->start();
+    }
+}
+
+void MediaPlayerService::AudioOutput::setNextOutput(const sp<AudioOutput>& nextOutput) {
+    mNextOutput = nextOutput;
+}
+
+
+void MediaPlayerService::AudioOutput::switchToNextOutput() {
+    ALOGV("switchToNextOutput");
+    if (mNextOutput != NULL) {
+        if (mCallbackData != NULL) {
+            mCallbackData->beginTrackSwitch();
+        }
+        delete mNextOutput->mCallbackData;
+        mNextOutput->mCallbackData = mCallbackData;
+        mCallbackData = NULL;
+        mNextOutput->mRecycledTrack = mTrack;
+        mTrack = NULL;
+        mNextOutput->mSampleRateHz = mSampleRateHz;
+        mNextOutput->mMsecsPerFrame = mMsecsPerFrame;
+    }
+}
+
+ssize_t MediaPlayerService::AudioOutput::write(const void* buffer, size_t size)
+{
+    LOG_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
+
+    //ALOGV("write(%p, %u)", buffer, size);
+    if (mTrack) {
+        ssize_t ret = mTrack->write(buffer, size);
+        return ret;
+    }
+    return NO_INIT;
+}
+
+void MediaPlayerService::AudioOutput::stop()
+{
+    ALOGV("stop");
+    if (mTrack) mTrack->stop();
+}
+
+void MediaPlayerService::AudioOutput::flush()
+{
+    ALOGV("flush");
+    if (mTrack) mTrack->flush();
+}
+
+void MediaPlayerService::AudioOutput::pause()
+{
+    ALOGV("pause");
+    if (mTrack) mTrack->pause();
+}
+
+void MediaPlayerService::AudioOutput::close()
+{
+    ALOGV("close");
+    delete mTrack;
+    mTrack = 0;
+}
+
+void MediaPlayerService::AudioOutput::setVolume(float left, float right)
+{
+    ALOGV("setVolume(%f, %f)", left, right);
+    mLeftVolume = left;
+    mRightVolume = right;
+    if (mTrack) {
+        mTrack->setVolume(left, right);
+    }
+}
+
+status_t MediaPlayerService::AudioOutput::setPlaybackRatePermille(int32_t ratePermille)
+{
+    ALOGV("setPlaybackRatePermille(%d)", ratePermille);
+    status_t res = NO_ERROR;
+    if (mTrack) {
+        res = mTrack->setSampleRate(ratePermille * mSampleRateHz / 1000);
+    } else {
+        res = NO_INIT;
+    }
+    mPlaybackRatePermille = ratePermille;
+    if (mSampleRateHz != 0) {
+        mMsecsPerFrame = mPlaybackRatePermille / (float) mSampleRateHz;
+    }
+    return res;
+}
+
+status_t MediaPlayerService::AudioOutput::setAuxEffectSendLevel(float level)
+{
+    ALOGV("setAuxEffectSendLevel(%f)", level);
+    mSendLevel = level;
+    if (mTrack) {
+        return mTrack->setAuxEffectSendLevel(level);
+    }
+    return NO_ERROR;
+}
+
+status_t MediaPlayerService::AudioOutput::attachAuxEffect(int effectId)
+{
+    ALOGV("attachAuxEffect(%d)", effectId);
+    mAuxEffectId = effectId;
+    if (mTrack) {
+        return mTrack->attachAuxEffect(effectId);
+    }
+    return NO_ERROR;
+}
+
+// static
+void MediaPlayerService::AudioOutput::CallbackWrapper(
+        int event, void *cookie, void *info) {
+    //ALOGV("callbackwrapper");
+    if (event != AudioTrack::EVENT_MORE_DATA) {
+        return;
+    }
+
+    CallbackData *data = (CallbackData*)cookie;
+    data->lock();
+    AudioOutput *me = data->getOutput();
+    AudioTrack::Buffer *buffer = (AudioTrack::Buffer *)info;
+    if (me == NULL) {
+        // no output set, likely because the track was scheduled to be reused
+        // by another player, but the format turned out to be incompatible.
+        data->unlock();
+        buffer->size = 0;
+        return;
+    }
+
+    size_t actualSize = (*me->mCallback)(
+            me, buffer->raw, buffer->size, me->mCallbackCookie);
+
+    if (actualSize == 0 && buffer->size > 0 && me->mNextOutput == NULL) {
+        // We've reached EOS but the audio track is not stopped yet,
+        // keep playing silence.
+
+        memset(buffer->raw, 0, buffer->size);
+        actualSize = buffer->size;
+    }
+
+    buffer->size = actualSize;
+    data->unlock();
+}
+
+int MediaPlayerService::AudioOutput::getSessionId()
+{
+    return mSessionId;
+}
+
+#undef LOG_TAG
+#define LOG_TAG "AudioCache"
+MediaPlayerService::AudioCache::AudioCache(const char* name) :
+    mChannelCount(0), mFrameCount(1024), mSampleRate(0), mSize(0),
+    mError(NO_ERROR), mCommandComplete(false)
+{
+    // create ashmem heap
+    mHeap = new MemoryHeapBase(kDefaultHeapSize, 0, name);
+}
+
+uint32_t MediaPlayerService::AudioCache::latency () const
+{
+    return 0;
+}
+
+float MediaPlayerService::AudioCache::msecsPerFrame() const
+{
+    return mMsecsPerFrame;
+}
+
+status_t MediaPlayerService::AudioCache::getPosition(uint32_t *position)
+{
+    if (position == 0) return BAD_VALUE;
+    *position = mSize;
+    return NO_ERROR;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+struct CallbackThread : public Thread {
+    CallbackThread(const wp<MediaPlayerBase::AudioSink> &sink,
+                   MediaPlayerBase::AudioSink::AudioCallback cb,
+                   void *cookie);
+
+protected:
+    virtual ~CallbackThread();
+
+    virtual bool threadLoop();
+
+private:
+    wp<MediaPlayerBase::AudioSink> mSink;
+    MediaPlayerBase::AudioSink::AudioCallback mCallback;
+    void *mCookie;
+    void *mBuffer;
+    size_t mBufferSize;
+
+    CallbackThread(const CallbackThread &);
+    CallbackThread &operator=(const CallbackThread &);
+};
+
+CallbackThread::CallbackThread(
+        const wp<MediaPlayerBase::AudioSink> &sink,
+        MediaPlayerBase::AudioSink::AudioCallback cb,
+        void *cookie)
+    : mSink(sink),
+      mCallback(cb),
+      mCookie(cookie),
+      mBuffer(NULL),
+      mBufferSize(0) {
+}
+
+CallbackThread::~CallbackThread() {
+    if (mBuffer) {
+        free(mBuffer);
+        mBuffer = NULL;
+    }
+}
+
+bool CallbackThread::threadLoop() {
+    sp<MediaPlayerBase::AudioSink> sink = mSink.promote();
+    if (sink == NULL) {
+        return false;
+    }
+
+    if (mBuffer == NULL) {
+        mBufferSize = sink->bufferSize();
+        mBuffer = malloc(mBufferSize);
+    }
+
+    size_t actualSize =
+        (*mCallback)(sink.get(), mBuffer, mBufferSize, mCookie);
+
+    if (actualSize > 0) {
+        sink->write(mBuffer, actualSize);
+    }
+
+    return true;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+status_t MediaPlayerService::AudioCache::open(
+        uint32_t sampleRate, int channelCount, audio_channel_mask_t channelMask,
+        audio_format_t format, int bufferCount,
+        AudioCallback cb, void *cookie)
+{
+    ALOGV("open(%u, %d, 0x%x, %d, %d)", sampleRate, channelCount, channelMask, format, bufferCount);
+    if (mHeap->getHeapID() < 0) {
+        return NO_INIT;
+    }
+
+    mSampleRate = sampleRate;
+    mChannelCount = (uint16_t)channelCount;
+    mFormat = format;
+    mMsecsPerFrame = 1.e3 / (float) sampleRate;
+
+    if (cb != NULL) {
+        mCallbackThread = new CallbackThread(this, cb, cookie);
+    }
+    return NO_ERROR;
+}
+
+void MediaPlayerService::AudioCache::start() {
+    if (mCallbackThread != NULL) {
+        mCallbackThread->run("AudioCache callback");
+    }
+}
+
+void MediaPlayerService::AudioCache::stop() {
+    if (mCallbackThread != NULL) {
+        mCallbackThread->requestExitAndWait();
+    }
+}
+
+ssize_t MediaPlayerService::AudioCache::write(const void* buffer, size_t size)
+{
+    ALOGV("write(%p, %u)", buffer, size);
+    if ((buffer == 0) || (size == 0)) return size;
+
+    uint8_t* p = static_cast<uint8_t*>(mHeap->getBase());
+    if (p == NULL) return NO_INIT;
+    p += mSize;
+    ALOGV("memcpy(%p, %p, %u)", p, buffer, size);
+    if (mSize + size > mHeap->getSize()) {
+        ALOGE("Heap size overflow! req size: %d, max size: %d", (mSize + size), mHeap->getSize());
+        size = mHeap->getSize() - mSize;
+    }
+    memcpy(p, buffer, size);
+    mSize += size;
+    return size;
+}
+
+// call with lock held
+status_t MediaPlayerService::AudioCache::wait()
+{
+    Mutex::Autolock lock(mLock);
+    while (!mCommandComplete) {
+        mSignal.wait(mLock);
+    }
+    mCommandComplete = false;
+
+    if (mError == NO_ERROR) {
+        ALOGV("wait - success");
+    } else {
+        ALOGV("wait - error");
+    }
+    return mError;
+}
+
+void MediaPlayerService::AudioCache::notify(
+        void* cookie, int msg, int ext1, int ext2, const Parcel *obj)
+{
+    ALOGV("notify(%p, %d, %d, %d)", cookie, msg, ext1, ext2);
+    AudioCache* p = static_cast<AudioCache*>(cookie);
+
+    // ignore buffering messages
+    switch (msg)
+    {
+    case MEDIA_ERROR:
+        ALOGE("Error %d, %d occurred", ext1, ext2);
+        p->mError = ext1;
+        break;
+    case MEDIA_PREPARED:
+        ALOGV("prepared");
+        break;
+    case MEDIA_PLAYBACK_COMPLETE:
+        ALOGV("playback complete");
+        break;
+    default:
+        ALOGV("ignored");
+        return;
+    }
+
+    // wake up thread
+    Mutex::Autolock lock(p->mLock);
+    p->mCommandComplete = true;
+    p->mSignal.signal();
+}
+
+int MediaPlayerService::AudioCache::getSessionId()
+{
+    return 0;
+}
+
+void MediaPlayerService::addBatteryData(uint32_t params)
+{
+    Mutex::Autolock lock(mLock);
+
+    int32_t time = systemTime() / 1000000L;
+
+    // change audio output devices. This notification comes from AudioFlinger
+    if ((params & kBatteryDataSpeakerOn)
+            || (params & kBatteryDataOtherAudioDeviceOn)) {
+
+        int deviceOn[NUM_AUDIO_DEVICES];
+        for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
+            deviceOn[i] = 0;
+        }
+
+        if ((params & kBatteryDataSpeakerOn)
+                && (params & kBatteryDataOtherAudioDeviceOn)) {
+            deviceOn[SPEAKER_AND_OTHER] = 1;
+        } else if (params & kBatteryDataSpeakerOn) {
+            deviceOn[SPEAKER] = 1;
+        } else {
+            deviceOn[OTHER_AUDIO_DEVICE] = 1;
+        }
+
+        for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
+            if (mBatteryAudio.deviceOn[i] != deviceOn[i]){
+
+                if (mBatteryAudio.refCount > 0) { // if playing audio
+                    if (!deviceOn[i]) {
+                        mBatteryAudio.lastTime[i] += time;
+                        mBatteryAudio.totalTime[i] += mBatteryAudio.lastTime[i];
+                        mBatteryAudio.lastTime[i] = 0;
+                    } else {
+                        mBatteryAudio.lastTime[i] = 0 - time;
+                    }
+                }
+
+                mBatteryAudio.deviceOn[i] = deviceOn[i];
+            }
+        }
+        return;
+    }
+
+    // an sudio stream is started
+    if (params & kBatteryDataAudioFlingerStart) {
+        // record the start time only if currently no other audio
+        // is being played
+        if (mBatteryAudio.refCount == 0) {
+            for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
+                if (mBatteryAudio.deviceOn[i]) {
+                    mBatteryAudio.lastTime[i] -= time;
+                }
+            }
+        }
+
+        mBatteryAudio.refCount ++;
+        return;
+
+    } else if (params & kBatteryDataAudioFlingerStop) {
+        if (mBatteryAudio.refCount <= 0) {
+            ALOGW("Battery track warning: refCount is <= 0");
+            return;
+        }
+
+        // record the stop time only if currently this is the only
+        // audio being played
+        if (mBatteryAudio.refCount == 1) {
+            for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
+                if (mBatteryAudio.deviceOn[i]) {
+                    mBatteryAudio.lastTime[i] += time;
+                    mBatteryAudio.totalTime[i] += mBatteryAudio.lastTime[i];
+                    mBatteryAudio.lastTime[i] = 0;
+                }
+            }
+        }
+
+        mBatteryAudio.refCount --;
+        return;
+    }
+
+    int uid = IPCThreadState::self()->getCallingUid();
+    if (uid == AID_MEDIA) {
+        return;
+    }
+    int index = mBatteryData.indexOfKey(uid);
+
+    if (index < 0) { // create a new entry for this UID
+        BatteryUsageInfo info;
+        info.audioTotalTime = 0;
+        info.videoTotalTime = 0;
+        info.audioLastTime = 0;
+        info.videoLastTime = 0;
+        info.refCount = 0;
+
+        if (mBatteryData.add(uid, info) == NO_MEMORY) {
+            ALOGE("Battery track error: no memory for new app");
+            return;
+        }
+    }
+
+    BatteryUsageInfo &info = mBatteryData.editValueFor(uid);
+
+    if (params & kBatteryDataCodecStarted) {
+        if (params & kBatteryDataTrackAudio) {
+            info.audioLastTime -= time;
+            info.refCount ++;
+        }
+        if (params & kBatteryDataTrackVideo) {
+            info.videoLastTime -= time;
+            info.refCount ++;
+        }
+    } else {
+        if (info.refCount == 0) {
+            ALOGW("Battery track warning: refCount is already 0");
+            return;
+        } else if (info.refCount < 0) {
+            ALOGE("Battery track error: refCount < 0");
+            mBatteryData.removeItem(uid);
+            return;
+        }
+
+        if (params & kBatteryDataTrackAudio) {
+            info.audioLastTime += time;
+            info.refCount --;
+        }
+        if (params & kBatteryDataTrackVideo) {
+            info.videoLastTime += time;
+            info.refCount --;
+        }
+
+        // no stream is being played by this UID
+        if (info.refCount == 0) {
+            info.audioTotalTime += info.audioLastTime;
+            info.audioLastTime = 0;
+            info.videoTotalTime += info.videoLastTime;
+            info.videoLastTime = 0;
+        }
+    }
+}
+
+status_t MediaPlayerService::pullBatteryData(Parcel* reply) {
+    Mutex::Autolock lock(mLock);
+
+    // audio output devices usage
+    int32_t time = systemTime() / 1000000L; //in ms
+    int32_t totalTime;
+
+    for (int i = 0; i < NUM_AUDIO_DEVICES; i++) {
+        totalTime = mBatteryAudio.totalTime[i];
+
+        if (mBatteryAudio.deviceOn[i]
+            && (mBatteryAudio.lastTime[i] != 0)) {
+                int32_t tmpTime = mBatteryAudio.lastTime[i] + time;
+                totalTime += tmpTime;
+        }
+
+        reply->writeInt32(totalTime);
+        // reset the total time
+        mBatteryAudio.totalTime[i] = 0;
+   }
+
+    // codec usage
+    BatteryUsageInfo info;
+    int size = mBatteryData.size();
+
+    reply->writeInt32(size);
+    int i = 0;
+
+    while (i < size) {
+        info = mBatteryData.valueAt(i);
+
+        reply->writeInt32(mBatteryData.keyAt(i)); //UID
+        reply->writeInt32(info.audioTotalTime);
+        reply->writeInt32(info.videoTotalTime);
+
+        info.audioTotalTime = 0;
+        info.videoTotalTime = 0;
+
+        // remove the UID entry where no stream is being played
+        if (info.refCount <= 0) {
+            mBatteryData.removeItemsAt(i);
+            size --;
+            i --;
+        }
+        i++;
+    }
+    return NO_ERROR;
+}
+} // namespace android