Assert in ApplyFdCng_ivas_fx of BASOP decoder for float encoder MASA bitstream using DTX at 32 kbps

Basic info

• Float reference:
  • Encoder (float): de0a9fca
• Fixed point:
  • Decoder (fixed): d68c8f84

Bug description

There is an assertion in frame 420 when BASOP decoder is fed with a bitstream generated from selection test material MASA using float encoder at 32 kbps and DTX enabled.

Stack trace:

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-xxxx

Use this command line with the BASOP decoder and the bitstream provided in Box.

IVAS_dec EXT 48 test_0752.bs 0752_BASOP_Selection_MUSHRA-7ab_s15.wav_32k_48-48___EXT.wav

The inputs to float encoder are also in the Box and you can generate the bitstream with

IVAS_cod -masa 2 BASOP_Selection_MUSHRA-7ab_s15.met -max_band swb -dtx 32000 48 BASOP_Selection_MUSHRA-7ab_s15.wav test_0752.bs