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[Non BE] Fix of Stereo CNG parameters bit rate to eliminate false BER detect and corrupt bitstream reading in rate switching.

norvell requested to merge 878-buffer-overflow-in-stereo-dtx-rate-switching-with-frame-errors into main

Reason why this change is needed

  • In stereo DTX with rate switching and frame errors the Stereo CNG total bit rate was not set correctly. The bitstream reader reported bit errors and the decoded parameters were incorrect.

Description of the change

  • The Stereo CNG parameters number of bits is set in stereo CNG frame decoding.

Affected operating points

  • Stereo DTX rate switching with frame errors
  • Decoder fix -- bitstream not affected
  • Non-BE output, since the affected frames are now decoded correctly.

Related to #878 (closed)

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