6 files changed, 3 insertions, 68 deletions
diff --git a/dom/media/platforms/wmf/DXVA2Manager.cpp b/dom/media/platforms/wmf/DXVA2Manager.cpp
index 0c1734c54..69e002f7f 100644
--- a/dom/media/platforms/wmf/DXVA2Manager.cpp
+++ b/dom/media/platforms/wmf/DXVA2Manager.cpp
@@ -14,8 +14,6 @@
 #include "mozilla/layers/D3D11ShareHandleImage.h"
 #include "mozilla/layers/ImageBridgeChild.h"
 #include "mozilla/layers/TextureForwarder.h"
-#include "mozilla/Telemetry.h"
-#include "MediaTelemetryConstants.h"
 #include "mfapi.h"
 #include "gfxPrefs.h"
 #include "MFTDecoder.h"
@@ -442,9 +440,6 @@ D3D9DXVA2Manager::Init(layers::KnowsCompositor* aKnowsCompositor,
   }
   mTextureClientAllocator->SetMaxPoolSize(5);
 
-  Telemetry::Accumulate(Telemetry::MEDIA_DECODER_BACKEND_USED,
-                        uint32_t(media::MediaDecoderBackend::WMFDXVA2D3D9));
-
   return S_OK;
 }
 
@@ -775,9 +770,6 @@ D3D11DXVA2Manager::Init(layers::KnowsCompositor* aKnowsCompositor,
   }
   mTextureClientAllocator->SetMaxPoolSize(5);
 
-  Telemetry::Accumulate(Telemetry::MEDIA_DECODER_BACKEND_USED,
-                        uint32_t(media::MediaDecoderBackend::WMFDXVA2D3D11));
-
   return S_OK;
 }
 
diff --git a/dom/media/platforms/wmf/WMFAudioMFTManager.cpp b/dom/media/platforms/wmf/WMFAudioMFTManager.cpp
index 69b62da51..3dacdf0aa 100644
--- a/dom/media/platforms/wmf/WMFAudioMFTManager.cpp
+++ b/dom/media/platforms/wmf/WMFAudioMFTManager.cpp
@@ -252,7 +252,6 @@ WMFAudioMFTManager::Output(int64_t aStreamOffset,
     LOG("Audio MFTDecoder returned success but null output.");
     nsCOMPtr<nsIRunnable> task = NS_NewRunnableFunction([]() -> void {
       LOG("Reporting telemetry AUDIO_MFT_OUTPUT_NULL_SAMPLES");
-      Telemetry::Accumulate(Telemetry::ID::AUDIO_MFT_OUTPUT_NULL_SAMPLES, 1);
     });
     AbstractThread::MainThread()->Dispatch(task.forget());
     return E_FAIL;
diff --git a/dom/media/platforms/wmf/WMFDecoderModule.h b/dom/media/platforms/wmf/WMFDecoderModule.h
index cd7b8c660..6582f8056 100644
--- a/dom/media/platforms/wmf/WMFDecoderModule.h
+++ b/dom/media/platforms/wmf/WMFDecoderModule.h
@@ -40,10 +40,8 @@ public:
   static int GetNumDecoderThreads();
 
   // Accessors that report whether we have the required MFTs available
-  // on the system to play various codecs. Windows Vista doesn't have the
-  // H.264/AAC decoders if the "Platform Update Supplement for Windows Vista"
-  // is not installed, and Window N and KN variants also require a "Media
-  // Feature Pack" to be installed. Windows XP doesn't have WMF.
+  // on the system to play various codecs. Windows N and KN variants
+  // require a "Media Feature Pack" to be installed.
   static bool HasAAC();
   static bool HasH264();
 
diff --git a/dom/media/platforms/wmf/WMFMediaDataDecoder.cpp b/dom/media/platforms/wmf/WMFMediaDataDecoder.cpp
index d2c13eac7..e6dd29c6d 100644
--- a/dom/media/platforms/wmf/WMFMediaDataDecoder.cpp
+++ b/dom/media/platforms/wmf/WMFMediaDataDecoder.cpp
@@ -8,7 +8,6 @@
 #include "VideoUtils.h"
 #include "WMFUtils.h"
 #include "nsTArray.h"
-#include "mozilla/Telemetry.h"
 
 #include "mozilla/Logging.h"
 #include "mozilla/SyncRunnable.h"
@@ -39,39 +38,6 @@ WMFMediaDataDecoder::Init()
   return InitPromise::CreateAndResolve(mMFTManager->GetType(), __func__);
 }
 
-// A single telemetry sample is reported for each MediaDataDecoder object
-// that has detected error or produced output successfully.
-static void
-SendTelemetry(unsigned long hr)
-{
-  // Collapse the error codes into a range of 0-0xff that can be viewed in
-  // telemetry histograms.  For most MF_E_* errors, unique samples are used,
-  // retaining the least significant 7 or 8 bits.  Other error codes are
-  // bucketed.
-  uint32_t sample;
-  if (SUCCEEDED(hr)) {
-    sample = 0;
-  } else if (hr < 0xc00d36b0) {
-    sample = 1; // low bucket
-  } else if (hr < 0xc00d3700) {
-    sample = hr & 0xffU; // MF_E_*
-  } else if (hr <= 0xc00d3705) {
-    sample = 0x80 + (hr & 0xfU); // more MF_E_*
-  } else if (hr < 0xc00d6d60) {
-    sample = 2; // mid bucket
-  } else if (hr <= 0xc00d6d78) {
-    sample = hr & 0xffU; // MF_E_TRANSFORM_*
-  } else {
-    sample = 3; // high bucket
-  }
-
-  nsCOMPtr<nsIRunnable> runnable = NS_NewRunnableFunction(
-    [sample] {
-      Telemetry::Accumulate(Telemetry::MEDIA_WMF_DECODE_ERROR, sample);
-    });
-  NS_DispatchToMainThread(runnable);
-}
-
 void
 WMFMediaDataDecoder::Shutdown()
 {
@@ -91,9 +57,6 @@ WMFMediaDataDecoder::ProcessShutdown()
   if (mMFTManager) {
     mMFTManager->Shutdown();
     mMFTManager = nullptr;
-    if (!mRecordedError && mHasSuccessfulOutput) {
-      SendTelemetry(S_OK);
-    }
   }
 }
 
@@ -125,10 +88,6 @@ WMFMediaDataDecoder::ProcessDecode(MediaRawData* aSample)
     NS_WARNING("MFTManager rejected sample");
     mCallback->Error(MediaResult(NS_ERROR_DOM_MEDIA_DECODE_ERR,
                                  RESULT_DETAIL("MFTManager::Input:%x", hr)));
-    if (!mRecordedError) {
-      SendTelemetry(hr);
-      mRecordedError = true;
-    }
     return;
   }
 
@@ -144,7 +103,6 @@ WMFMediaDataDecoder::ProcessOutput()
   HRESULT hr = S_OK;
   while (SUCCEEDED(hr = mMFTManager->Output(mLastStreamOffset, output)) &&
          output) {
-    mHasSuccessfulOutput = true;
     mCallback->Output(output);
   }
   if (hr == MF_E_TRANSFORM_NEED_MORE_INPUT) {
@@ -153,10 +111,6 @@ WMFMediaDataDecoder::ProcessOutput()
     NS_WARNING("WMFMediaDataDecoder failed to output data");
     mCallback->Error(MediaResult(NS_ERROR_DOM_MEDIA_DECODE_ERR,
                                  RESULT_DETAIL("MFTManager::Output:%x", hr)));
-    if (!mRecordedError) {
-      SendTelemetry(hr);
-      mRecordedError = true;
-    }
   }
 }
 
diff --git a/dom/media/platforms/wmf/WMFMediaDataDecoder.h b/dom/media/platforms/wmf/WMFMediaDataDecoder.h
index a4dd49f56..f869012e7 100644
--- a/dom/media/platforms/wmf/WMFMediaDataDecoder.h
+++ b/dom/media/platforms/wmf/WMFMediaDataDecoder.h
@@ -33,7 +33,7 @@ public:
   // Returns S_OK on success, or MF_E_TRANSFORM_NEED_MORE_INPUT if there's not
   // enough data to produce more output. If this returns a failure code other
   // than MF_E_TRANSFORM_NEED_MORE_INPUT, an error will be reported to the
-  // MP4Reader.
+  // MP4Demuxer.
   virtual HRESULT Output(int64_t aStreamOffset,
                          RefPtr<MediaData>& aOutput) = 0;
 
@@ -136,10 +136,6 @@ private:
   Atomic<bool> mIsFlushing;
 
   bool mIsShutDown;
-
-  // For telemetry
-  bool mHasSuccessfulOutput = false;
-  bool mRecordedError = false;
 };
 
 } // namespace mozilla
diff --git a/dom/media/platforms/wmf/WMFVideoMFTManager.cpp b/dom/media/platforms/wmf/WMFVideoMFTManager.cpp
index 291bc5b74..a7633a7de 100644
--- a/dom/media/platforms/wmf/WMFVideoMFTManager.cpp
+++ b/dom/media/platforms/wmf/WMFVideoMFTManager.cpp
@@ -27,7 +27,6 @@
 #include "mozilla/WindowsVersion.h"
 #include "mozilla/Telemetry.h"
 #include "nsPrintfCString.h"
-#include "MediaTelemetryConstants.h"
 #include "GMPUtils.h" // For SplitAt. TODO: Move SplitAt to a central place.
 #include "MP4Decoder.h"
 #include "VPXDecoder.h"
@@ -128,7 +127,6 @@ WMFVideoMFTManager::~WMFVideoMFTManager()
 
   nsCOMPtr<nsIRunnable> task = NS_NewRunnableFunction([=]() -> void {
     LOG(nsPrintfCString("Reporting telemetry VIDEO_MFT_OUTPUT_NULL_SAMPLES=%d", telemetry).get());
-    Telemetry::Accumulate(Telemetry::ID::VIDEO_MFT_OUTPUT_NULL_SAMPLES, telemetry);
   });
   AbstractThread::MainThread()->Dispatch(task.forget());
 }
@@ -511,8 +509,6 @@ WMFVideoMFTManager::InitInternal(bool aForceD3D9)
     if (mStreamType == VP9 || mStreamType == VP8) {
       return false;
     }
-    Telemetry::Accumulate(Telemetry::MEDIA_DECODER_BACKEND_USED,
-                          uint32_t(media::MediaDecoderBackend::WMFSoftware));
   }
 
   mDecoder = decoder;