[FFmpeg-devel] [FFmpeg-cvslog] AAC encoder: tweak PNS usage to be more aggressive

[James Almer]

> ffmpeg | branch: master | Claudio Freire <klaussfreire at gmail.com> | Fri Sep 25 03:56:32 2015 -0300| [9458a62decfcaa1313b1ba69276466de536d0768] | committer: Claudio Freire
>
> AAC encoder: tweak PNS usage to be more aggressive
>
> This patch tweaks search_for_pns to be both more
> aggressive and more careful when applying PNS. On
> the one side, it will again try to use PNS on zero
> (or effectively zero) bands. For this, both zeroes
> and band_type have to be checked (some ZERO bands
> aren't marked in zeroes). On the other side, a more
> accurate rate-distortion measure avoids using PNS
> where it would cause audible distortion.
>
> Also fixed a small bug in the computation of freq
> that caused PNS usage on low-frequency bands during
> 8-short windows. This allows re-enabling PNS during
> 8-short.

Clang and gcc's address sanitizer complain about this change

http://fate.ffmpeg.org/report.cgi?time=20150925234050&slot=x86_64-archlinux-gcc-asan
http://fate.ffmpeg.org/report.cgi?time=20150925220641&slot=x86_64-debian-asan-144800