Fixing sample-rate dependent band-split filter issues in AEC3

webrtc/modules/audio_processing/aec3/aec3_common.h

Index: webrtc/modules/audio_processing/aec3/aec3_common.h
diff --git a/webrtc/modules/audio_processing/aec3/aec3_common.h b/webrtc/modules/audio_processing/aec3/aec3_common.h
index f03a7e33d29f25370d39f621679b1cccdfa9f0c1..dbfc4ed0d6e7219c565c83fedb61cf01f91e252c 100644
--- a/webrtc/modules/audio_processing/aec3/aec3_common.h
+++ b/webrtc/modules/audio_processing/aec3/aec3_common.h
@@ -68,6 +68,7 @@ constexpr size_t kRenderTransferQueueSize = kMaxApiCallsJitterBlocks / 2;
 static_assert(2 * kRenderTransferQueueSize >= kMaxApiCallsJitterBlocks,
               "Requirement to ensure buffer overflow detection");
 
+// TODO(peah): Integrate this with how it is done inside audio_processing_impl.
 constexpr size_t NumBandsForRate(int sample_rate_hz) {
   return static_cast<size_t>(sample_rate_hz == 8000 ? 1
                                                     : sample_rate_hz / 16000);