# Basic info <!--- Add commit SHA used to reproduce--> - Fixed point: Branch 20250826_branch_release_characterization_testing_main - Encoder (fixed): 53e1178c4461be1d2a38b25d6b366360bc99e742 - Decoder (fixed): 53e1178c4461be1d2a38b25d6b366360bc99e742 # Bug description The encoder triggers an assert in ivas_omasa_energy_and_ratio_est_fx() when processing the characterization-test items for P800-19, cat1, -16 LKFS: ``` #3 0x00007ffff7cb96e2 in __GI___assert_fail (assertion=0x5555559a77f2 "0", file=0x5555559a77e0 "lib_com/basop32.c", line=2340, function=0x5555559a7840 <__PRETTY_FUNCTION__.1> "L_shl") at assert.c:103 #4 0x00005555557fcc9b in L_shl (L_var1=-1075314688, var2=1) at lib_com/basop32.c:2340 #5 0x0000555555917324 in scale_sig32 (x=0x555555a91b40, lg=540, exp0=8) at lib_com/scale_mem_fx.c:308 #6 0x00005555555e3391 in ivas_omasa_energy_and_ratio_est_fx (hOMasa=0x555555a8e7c0, hOmasaData=0x555555a8d7d0, data_fx=0x7fffffff8a80, input_frame=960, nchan_ism=3, q_data=31) at lib_enc/ivas_omasa_enc_fx.c:1433 #7 0x00005555555e0b09 in ivas_omasa_enc_fx (hOMasa=0x555555a8e7c0, hMasa=0x555555a89ed0, hIsmMeta=0x555555a6d408, data_in=0x7fffffff8a80, q_data=31, input_frame=960, nchan_transport=2, nchan_ism=3, ism_mode=ISM_MASA_MODE_PARAM_ONE_OBJ, data_separated_object_fx=0x555555a72690, idx_separated_object=0x7fffffff8a76) at lib_enc/ivas_omasa_enc_fx.c:804 #8 0x000055555559a65b in ivas_enc_fx (st_ivas=0x555555a6d2d0, data=0x555555abdc20, n_samples=4800) at lib_enc/ivas_enc_fx.c:364 #9 0x000055555555ef2f in IVAS_ENC_EncodeFrameToSerial (hIvasEnc=0x555555a6d2a0, inputBuffer=0x555555abdc20, inputBufferSize=4800, outputBitStream=0x7fffffff8c70, numOutBits=0x7fffffff8c6e) at lib_enc/lib_enc_fx.c:1509 #10 0x0000555555559d0c in main (argc=13, argv=0x7fffffffded8) at apps/encoder.c:761 ``` Occurs in frame 900. # Ways to reproduce Box folder: ...\\Box_EXTERNAL_IVAS_CHAR_MC\Issues\basop-issue-1987 <!--Commandline or script--> ```bash IVAS_cod -ism_masa 3 2 cat1_concatenated.wav.0.csv cat1_concatenated.wav.1.csv cat1_concatenated.wav.2.csv cat1_concatenated.wav.met 64000 48 cat1_concatenated.wav out.192 ``` <!--- Below are labels that will be added but are not shown in description. This is a template to help fill them. Add further information to the first row and remove and add labels as necessary.-->