VIM4 Dolby support

Krupal · January 30, 2023, 1:54pm

Hello,

I am using the latest android images on VIM4 from OOWOW and trying to play dolby audio based mp4 file. However from the logs i found that VIM4 audio hal is not loading dolby ms12 library.

On further debugging it seems that the utility fails decrypt dolbyms12 library.

VIM4:/ # cat /vendor/etc/init/dolby_fw_dolbyms12.rc
VIM4:/ # /vendor/bin/dolby_fw_dolbyms12 /odm/etc/ms12/libdolbyms12.so /odm/lib/ms12/libdolbyms12.so
sig_addr: 0xeac40030
src_addr: eac40030
sig error value: 132
so signature check fail!

Can you please provide how to resolve this and play a dolby decoded audio on VIM4.

-Krupal

goenjoy · January 31, 2023, 1:45am

@Krupal Can you send me your audio files?

Krupal · January 31, 2023, 7:20am

@goenjoy I am using the sample dolby audio files from this link.

goenjoy · February 2, 2023, 6:56am

@Krupal Our CPU chip version does not support dolby.

Krupal · February 2, 2023, 7:08am

@goenjoy Thanks for the checking it out. Can you please help me know how to check which CPU/SoC supports dolby?

Krupal · February 2, 2023, 7:13am

A311D2 reference manual mentions that it has Dolby support (optional).

numbqq · February 2, 2023, 8:09am

Yes, the SoC shipped on VIM4 doesn’t support Dolby.