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[non-BE] Resolve "OSBA bitrate switching crashes with FOA and HOA2 output with higher order input"

  • Related issues: 775
  • Requested reviewers: @zhaokke

Reason why this change is needed

decoder crashes with OSBA decoding to FOA and HOA2

Description of the change

set enc_param_start band to the correct value when switching from HO-DirAC back to FO-DirAC

Affected operating points

  • OSBA with higher order SBA input
  • Produced bitstream is BE compared to previous state, no encoder changes
  • the output is not produced without this fix at all --> non-BE
Edited by Dominik Weckbecker

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