On 11/23/16, Michael Niedermayer <mich...@niedermayer.cc> wrote: > On Mon, Nov 21, 2016 at 02:21:07AM +0700, Muhammad Faiz wrote: >> On 11/21/16, Michael Niedermayer <mich...@niedermayer.cc> wrote: >> > On Sun, Nov 20, 2016 at 03:56:28PM +0700, Muhammad Faiz wrote: >> >> this allow to use phase_count_compensation on init (rather than >> >> rebuild on swr_set_compensation) when options suggest that >> >> soft compensation is enabled >> >> >> >> Signed-off-by: Muhammad Faiz <mfc...@gmail.com> >> >> --- >> >> libswresample/resample.c | 4 +++- >> >> libswresample/soxr_resample.c | 2 +- >> >> libswresample/swresample.c | 5 ++++- >> >> libswresample/swresample_internal.h | 3 ++- >> >> 4 files changed, 10 insertions(+), 4 deletions(-) >> > >> > please document this in the code with a comment or 2 >> > its not immedeatly obvious from reading the code >> >> ok, new patch attached >> >> thanks > >> resample.c | 7 ++++++- >> soxr_resample.c | 3 ++- >> swresample.c | 7 ++++++- >> swresample_internal.h | 3 ++- >> 4 files changed, 16 insertions(+), 4 deletions(-) >> ecc69d7aba15455780250ea23b661ebf136656c2 >> 0001-swresample-resample-add-soft_compensation-argument.patch >> From 5846ba0a6df69e41783ab4caa88d392abd339ed1 Mon Sep 17 00:00:00 2001 >> From: Muhammad Faiz <mfc...@gmail.com> >> Date: Mon, 21 Nov 2016 02:08:40 +0700 >> Subject: [PATCH] swresample/resample: add soft_compensation argument >> >> this allow to use larger phase_count on init (rather than >> rebuild on swr_set_compensation) when options suggest that >> soft compensation is enabled >> >> this affects only when exact_rational is enabled > > what if an application reinitializes the context more often than > triggering soft compensation ?
In this case (or in worse condition such as no actual soft compensation happens because timestamps are correct), the drawback is slower init/reinit, slightly slower resampling and increased memory usage. > > maybe keeping statistics on actual soft_compensation use vs reinit > would be a better deciding factor > but maybe iam missing something How I keep the statistics? The main goal is to avoid rebuilding filter bank at runtime that hurts real time application that use soft compensation e.g. AV sync that uses non audio clock. Actually I'm not sure with this. Thank's _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
