Merge "- Add method in MediaPlayerService to collect and pull codec usage (duration) for the battery app - Collect MediaPlayer decoding usage data"

2 files changed, 116 insertions, 0 deletions

diff --git a/media/libmediaplayerservice/MediaPlayerService.cpp b/media/libmediaplayerservice/MediaPlayerService.cpp
index 60bdd62..8c6f76b 100644
--- a/media/libmediaplayerservice/MediaPlayerService.cpp
+++ b/media/libmediaplayerservice/MediaPlayerService.cpp
@@ -23,6 +23,7 @@
 
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/time.h>
 #include <dirent.h>
 #include <unistd.h>
 
@@ -51,6 +52,8 @@
 #include <media/Metadata.h>
 #include <media/AudioTrack.h>
 
+#include <private/android_filesystem_config.h>
+
 #include "MediaRecorderClient.h"
 #include "MediaPlayerService.h"
 #include "MetadataRetrieverClient.h"
@@ -1762,4 +1765,93 @@ int MediaPlayerService::AudioCache::getSessionId()
     return 0;
 }
 
+void MediaPlayerService::addBatteryData(uint32_t params)
+{
+    Mutex::Autolock lock(mLock);
+    int uid = IPCThreadState::self()->getCallingUid();
+    if (uid == AID_MEDIA) {
+        return;
+    }
+    int index = mBatteryData.indexOfKey(uid);
+    int32_t time = systemTime() / 1000000L;
+
+    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;
+
+        mBatteryData.add(uid, info);
+    }
+
+    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) {
+            LOGW("Battery track warning: refCount is already 0");
+            return;
+        } else if (info.refCount < 0) {
+            LOGE("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);
+    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
diff --git a/media/libmediaplayerservice/MediaPlayerService.h b/media/libmediaplayerservice/MediaPlayerService.h
index 62f8ed6..9f41db0 100644
--- a/media/libmediaplayerservice/MediaPlayerService.h
+++ b/media/libmediaplayerservice/MediaPlayerService.h
@@ -204,7 +204,31 @@ public:
 
             void                removeClient(wp<Client> client);
 
+    // For battery usage tracking purpose
+    struct BatteryUsageInfo {
+        // how many streams are being played by one UID
+        int     refCount;
+        // a temp variable to store the duration(ms) of audio codecs
+        // when we start a audio codec, we minus the system time from audioLastTime
+        // when we pause it, we add the system time back to the audioLastTime
+        // so after the pause, audioLastTime = pause time - start time
+        // if multiple audio streams are played (or recorded), then audioLastTime
+        // = the total playing time of all the streams
+        int32_t audioLastTime;
+        // when all the audio streams are being paused, we assign audioLastTime to
+        // this variable, so this value could be provided to the battery app
+        // in the next pullBatteryData call
+        int32_t audioTotalTime;
+
+        int32_t videoLastTime;
+        int32_t videoTotalTime;
+    };
+    KeyedVector<int, BatteryUsageInfo>    mBatteryData;
 
+    // Collect info of the codec usage from media player and media recorder
+    virtual void                addBatteryData(uint32_t params);
+    // API for the Battery app to pull the data of codecs usage
+    virtual status_t            pullBatteryData(Parcel* reply);
 private:
 
     class Client : public BnMediaPlayer {