diff --git a/include/media/stagefright/DataSource.h b/include/media/stagefright/DataSource.h
index 052b9b7..ca21719 100644
--- a/include/media/stagefright/DataSource.h
+++ b/include/media/stagefright/DataSource.h
@@ -165,7 +165,7 @@
         if (numBytesRead == -1) { // If readAt() returns -1, there is an error.
             return false;
         }
-        if (numBytesRead < numBytesPerChunk) {
+        if (static_cast<size_t>(numBytesRead) < numBytesPerChunk) {
             // This case is triggered when the stream ends before the whole
             // chunk is read.
             x->appendArray(tmp, (size_t)numBytesRead / sizeof(T));
diff --git a/include/radio/Radio.h b/include/radio/Radio.h
index a4dfdd1..fb4dd2f 100644
--- a/include/radio/Radio.h
+++ b/include/radio/Radio.h
@@ -79,7 +79,6 @@
 
             Mutex                   mLock;
             sp<IRadio>              mIRadio;
-            const radio_handle_t    mHandle;
             sp<RadioCallback>       mCallback;
 };
 
diff --git a/include/soundtrigger/SoundTrigger.h b/include/soundtrigger/SoundTrigger.h
index 9a05cac..7a29e31 100644
--- a/include/soundtrigger/SoundTrigger.h
+++ b/include/soundtrigger/SoundTrigger.h
@@ -72,7 +72,6 @@
 
             Mutex                               mLock;
             sp<ISoundTrigger>                   mISoundTrigger;
-            const sound_trigger_module_handle_t mModule;
             sp<SoundTriggerCallback>            mCallback;
 };
 
diff --git a/media/libstagefright/MPEG2TSWriter.cpp b/media/libstagefright/MPEG2TSWriter.cpp
index 931b280..dc4e32c 100644
--- a/media/libstagefright/MPEG2TSWriter.cpp
+++ b/media/libstagefright/MPEG2TSWriter.cpp
@@ -739,7 +739,7 @@
     uint32_t crc = htonl(crc32(&buffer->data()[5], 12));
     memcpy(&buffer->data()[17], &crc, sizeof(crc));
 
-    CHECK_EQ(internalWrite(buffer->data(), buffer->size()), buffer->size());
+    CHECK_EQ(internalWrite(buffer->data(), buffer->size()), (ssize_t)buffer->size());
 }
 
 void MPEG2TSWriter::writeProgramMap() {
@@ -815,7 +815,7 @@
     uint32_t crc = htonl(crc32(&buffer->data()[5], 12+mSources.size()*5));
     memcpy(&buffer->data()[17+mSources.size()*5], &crc, sizeof(crc));
 
-    CHECK_EQ(internalWrite(buffer->data(), buffer->size()), buffer->size());
+    CHECK_EQ(internalWrite(buffer->data(), buffer->size()), (ssize_t)buffer->size());
 }
 
 void MPEG2TSWriter::writeAccessUnit(
@@ -920,7 +920,7 @@
 
     memcpy(ptr, accessUnit->data(), copy);
 
-    CHECK_EQ(internalWrite(buffer->data(), buffer->size()), buffer->size());
+    CHECK_EQ(internalWrite(buffer->data(), buffer->size()), (ssize_t)buffer->size());
 
     size_t offset = copy;
     while (offset < accessUnit->size()) {
@@ -966,7 +966,7 @@
 
         memcpy(ptr, accessUnit->data() + offset, copy);
         CHECK_EQ(internalWrite(buffer->data(), buffer->size()),
-                 buffer->size());
+                 (ssize_t)buffer->size());
 
         offset += copy;
     }
diff --git a/media/libstagefright/codecs/flac/enc/SoftFlacEncoder.h b/media/libstagefright/codecs/flac/enc/SoftFlacEncoder.h
index 97361fa..6027f76 100644
--- a/media/libstagefright/codecs/flac/enc/SoftFlacEncoder.h
+++ b/media/libstagefright/codecs/flac/enc/SoftFlacEncoder.h
@@ -48,13 +48,10 @@
     virtual void onQueueFilled(OMX_U32 portIndex);
 
 private:
-
-    enum {
-        kNumBuffers = 2,
-        kMaxNumSamplesPerFrame = 1152,
-        kMaxInputBufferSize = kMaxNumSamplesPerFrame * sizeof(int16_t) * 2,
-        kMaxOutputBufferSize = 65536,    //TODO check if this can be reduced
-    };
+    const unsigned int kNumBuffers = 2;
+    const unsigned int kMaxNumSamplesPerFrame = 1152;
+    const unsigned int kMaxInputBufferSize = kMaxNumSamplesPerFrame * sizeof(int16_t) * 2;
+    const unsigned int kMaxOutputBufferSize = 65536;    //TODO check if this can be reduced
 
     bool mSignalledError;
 
diff --git a/media/libstagefright/codecs/mp3dec/SoftMP3.cpp b/media/libstagefright/codecs/mp3dec/SoftMP3.cpp
index 0822c34..3def1f0 100644
--- a/media/libstagefright/codecs/mp3dec/SoftMP3.cpp
+++ b/media/libstagefright/codecs/mp3dec/SoftMP3.cpp
@@ -274,7 +274,7 @@
         mConfig->inputBufferUsedLength = 0;
 
         mConfig->outputFrameSize = kOutputBufferSize / sizeof(int16_t);
-        if ((int32)outHeader->nAllocLen < mConfig->outputFrameSize) {
+        if ((int32_t)outHeader->nAllocLen < mConfig->outputFrameSize) {
             ALOGE("input buffer too small: got %u, expected %u",
                 outHeader->nAllocLen, mConfig->outputFrameSize);
             android_errorWriteLog(0x534e4554, "27793371");
@@ -363,7 +363,7 @@
             mAnchorTimeUs + (mNumFramesOutput * 1000000ll) / mSamplingRate;
 
         if (inHeader) {
-            CHECK_GE(inHeader->nFilledLen, mConfig->inputBufferUsedLength);
+            CHECK_GE((int32_t)inHeader->nFilledLen, mConfig->inputBufferUsedLength);
 
             inHeader->nOffset += mConfig->inputBufferUsedLength;
             inHeader->nFilledLen -= mConfig->inputBufferUsedLength;
diff --git a/media/libstagefright/httplive/LiveSession.cpp b/media/libstagefright/httplive/LiveSession.cpp
index f673426..dd941c1 100644
--- a/media/libstagefright/httplive/LiveSession.cpp
+++ b/media/libstagefright/httplive/LiveSession.cpp
@@ -1535,7 +1535,7 @@
                     mOrigBandwidthIndex, mCurBandwidthIndex);
         }
     }
-    CHECK_LT(mCurBandwidthIndex, mBandwidthItems.size());
+    CHECK_LT((size_t)mCurBandwidthIndex, mBandwidthItems.size());
     const BandwidthItem &item = mBandwidthItems.itemAt(mCurBandwidthIndex);
 
     uint32_t streamMask = 0; // streams that should be fetched by the new fetcher
diff --git a/media/libstagefright/wifi-display/MediaSender.cpp b/media/libstagefright/wifi-display/MediaSender.cpp
index 6f0087f..9b0af33 100644
--- a/media/libstagefright/wifi-display/MediaSender.cpp
+++ b/media/libstagefright/wifi-display/MediaSender.cpp
@@ -420,7 +420,7 @@
             CHECK(accessUnit->meta()->findInt32("rangeLength", &rangeLength));
             CHECK(accessUnit->meta()->findMessage("notify", &notify)
                     && notify != NULL);
-            CHECK_GE(accessUnit->size(), rangeLength);
+            CHECK_GE((int32_t)accessUnit->size(), rangeLength);
 
             sp<GraphicBuffer> grbuf(new GraphicBuffer(
                     rangeOffset + rangeLength, 1, HAL_PIXEL_FORMAT_Y8,
diff --git a/media/libstagefright/wifi-display/rtp/RTPBase.h b/media/libstagefright/wifi-display/rtp/RTPBase.h
index 6178f00..194f1ee 100644
--- a/media/libstagefright/wifi-display/rtp/RTPBase.h
+++ b/media/libstagefright/wifi-display/rtp/RTPBase.h
@@ -36,10 +36,8 @@
         TRANSPORT_TCP_INTERLEAVED,
     };
 
-    enum {
-        // Really UDP _payload_ size
-        kMaxUDPPacketSize = 1472,   // 1472 good, 1473 bad on Android@Home
-    };
+    // Really UDP _payload_ size
+    const unsigned int kMaxUDPPacketSize = 1472;   // 1472 good, 1473 bad on Android@Home
 
     static int32_t PickRandomRTPPort();
 };
diff --git a/media/libstagefright/wifi-display/rtp/RTPSender.h b/media/libstagefright/wifi-display/rtp/RTPSender.h
index fefcab7..bedfd01 100644
--- a/media/libstagefright/wifi-display/rtp/RTPSender.h
+++ b/media/libstagefright/wifi-display/rtp/RTPSender.h
@@ -66,11 +66,9 @@
         kWhatRTCPNotify,
     };
 
-    enum {
-        kMaxNumTSPacketsPerRTPPacket = (kMaxUDPPacketSize - 12) / 188,
-        kMaxHistorySize              = 1024,
-        kSourceID                    = 0xdeadbeef,
-    };
+    const unsigned int kMaxNumTSPacketsPerRTPPacket = (kMaxUDPPacketSize - 12) / 188;
+    const unsigned int kMaxHistorySize              = 1024;
+    const unsigned int kSourceID                    = 0xdeadbeef;
 
     sp<ANetworkSession> mNetSession;
     sp<AMessage> mNotify;
diff --git a/radio/Radio.cpp b/radio/Radio.cpp
index 3c04fb0..57c7e89 100644
--- a/radio/Radio.cpp
+++ b/radio/Radio.cpp
@@ -117,8 +117,8 @@
 
 
 // Radio
-Radio::Radio(radio_handle_t handle, const sp<RadioCallback>& callback)
-    : mHandle(handle), mCallback(callback)
+Radio::Radio(radio_handle_t /*handle*/, const sp<RadioCallback>& callback)
+    : mCallback(callback)
 {
 }
 
diff --git a/soundtrigger/SoundTrigger.cpp b/soundtrigger/SoundTrigger.cpp
index e959b83..289b7b1 100644
--- a/soundtrigger/SoundTrigger.cpp
+++ b/soundtrigger/SoundTrigger.cpp
@@ -124,9 +124,9 @@
 }
 
 // SoundTrigger
-SoundTrigger::SoundTrigger(sound_trigger_module_handle_t module,
+SoundTrigger::SoundTrigger(sound_trigger_module_handle_t /*module*/,
                                  const sp<SoundTriggerCallback>& callback)
-    : mModule(module), mCallback(callback)
+    : mCallback(callback)
 {
 }