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Improved interpretation of DTMF tones in DtmfTransformEngine #433

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Improved interpretation of DTMF tones in DtmfTransformEngine #433

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Commits on Mar 26, 2021

  1. Improved interpretation of DTMF tones in DtmfTransformEngine 

    This change addresses a number of issues that led to incorrect interpretations
of DTMF tones, especially tone sequences.

It introduces a queue to mitigate previous thread-safety issues and handle
more than one RTP packet at a time (a single tone is associated with at least
three RTP packets).

It also adds support to recognize shorter tones (<120 ms) that are typically
represented by one self-contained RTP packet containing both start and end
indications.
    @cbeckr
    cbeckr committed Mar 26, 2021
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