Bug 1659244 - Remove audibility code from AudioSegment and AudioBlock. r=pehrsons

Same rationale as for AudioData, the audibility is best computed externally.

Differential Revision: https://phabricator.services.mozilla.com/D90432

dom/media/AudioSegment.h

@@ -208,23 +208,6 @@ struct AudioChunk {
 
   bool IsMuted() const { return mVolume == 0.0f; }
 
-  bool IsAudible() const {
-    for (auto&& channel : mChannelData) {
-      // Transform sound into dB RMS and assume that the value smaller than -100
-      // is inaudible.
-      float dbrms = 0.0;
-      for (uint32_t idx = 0; idx < mDuration; idx++) {
-        dbrms += std::pow(static_cast<const AudioDataValue*>(channel)[idx], 2);
-      }
-      dbrms /= mDuration;
-      dbrms = std::sqrt(dbrms) != 0.0 ? 20 * log10(dbrms) : -1000.0;
-      if (dbrms > -100.0) {
-        return true;
-      }
-    }
-    return false;
-  }
-
   size_t SizeOfExcludingThisIfUnshared(MallocSizeOf aMallocSizeOf) const {
     return SizeOfExcludingThis(aMallocSizeOf, true);
   }

dom/media/webaudio/AudioBlock.h

@@ -38,7 +38,6 @@ class AudioBlock : private AudioChunk {
   using AudioChunk::ChannelCount;
   using AudioChunk::ChannelData;
   using AudioChunk::GetDuration;
-  using AudioChunk::IsAudible;
   using AudioChunk::IsNull;
   using AudioChunk::SizeOfExcludingThis;
   using AudioChunk::SizeOfExcludingThisIfUnshared;