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LTV crash Fixes, bug-fix in acelp_core_dec_ivas_fx

Sandesh Venkatesh requested to merge ltv_crash_fixes_acelp_core_bug_fix into main

[x] Below LTV issues are addressed:
[stereo bitrate switching from 13.2 kbps to 128 kbps, 32kHz in, 32kHz out]
[4 ISM with extended metadata and non diegetic pan object switching bitrate 256 kbps, 48 kHz in, 48 kHz out, DTX on, BINAURAL out]
[MASA 1dir 2TC at 32 kbps, 48kHz in, 48kHz out, BINAURAL ROOM IR out, HR, exo]
[MASA 1dir 2TC at 32 kbps, 48kHz in, 48kHz out, BINAURAL ROOM IR out, HR, OT, exo]
[MASA 1dir 2TC at 32 kbps, 48kHz in, 48kHz out, BINAURAL ROOM IR out, HR, OT]
[MASA 1dir 2TC at 32 kbps, 48kHz in, 48kHz out, BINAURAL ROOM IR out, HR]
[MASA 1dir 2TC at 32 kbps, 48kHz in, 48kHz out, BINAURAL ROOM IR out]
[x] Fixes a bug related to Copy_Scale_sig_16_32 in acelp_core_dec_ivas_fx
[x] Added changes for accomodating variable Q inside decoder_tcx_imdct function.

EVS 26.444 BE test passes.
pytests results: 588 failed, 381 skipped

MLD scores:
Original inputs:
MLD > 10: 107; Out of these, 51 cases are PLC
MLD > 5 : 125
MLD < 5 : 366

+10dB inputs:
MLD > 10: 221
MLD > 5 : 191
MLD < 5 : 186

-10dB inputs:
MLD > 10: 72
MLD > 5 : 75
MLD < 5 : 451

Edited by Sandesh Venkatesh

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