virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-05-13 21:26:33 +02:00
Code Issues Releases Activity

avfilter/af_adelay: add option which changes how unset channels are delayed

Browse Source 
Fixes #8032.
This commit is contained in:
Paul B Mahol 2019-10-07 18:02:50 +02:00
parent 9a53e01252
commit 0633d87ae6
2 changed files with 17 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
doc/filters.texi
View File

@ -688,6 +688,10 @@ Unused delays will be silently ignored. If number of given delays is
smaller than number of channels all remaining channels will not be delayed. smaller than number of channels all remaining channels will not be delayed.
If you want to delay exact number of samples, append 'S' to number. If you want to delay exact number of samples, append 'S' to number.
If you want instead to delay in seconds, append 's' to number. If you want instead to delay in seconds, append 's' to number.
@item all
Use last set delay for all remaining channels. By default is disabled.
This option if enabled changes how option @code{delays} is interpreted.
@end table @end table
@subsection Examples @subsection Examples
@ -706,6 +710,12 @@ the first channel (and any other channels that may be present) unchanged.
@example @example
adelay=0|500S|700S adelay=0|500S|700S
@end example @end example
@item
Delay all channels by same number of samples:
@example
adelay=delays=64S:all=1
@end example
@end itemize @end itemize
@section aderivative, aintegral @section aderivative, aintegral

7
libavfilter/af_adelay.c
View File

@ -36,6 +36,7 @@ typedef struct ChanDelay {
typedef struct AudioDelayContext { typedef struct AudioDelayContext {
const AVClass *class; const AVClass *class;
int all;
char *delays; char *delays;
ChanDelay *chandelay; ChanDelay *chandelay;
int nb_delays; int nb_delays;
@ -54,6 +55,7 @@ typedef struct AudioDelayContext {
static const AVOption adelay_options[] = { static const AVOption adelay_options[] = {
{ "delays", "set list of delays for each channel", OFFSET(delays), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, A }, { "delays", "set list of delays for each channel", OFFSET(delays), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, A },
{ "all", "use last available delay for remained channels", OFFSET(all), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, A },
{ NULL } { NULL }
}; };
@ -163,6 +165,11 @@ static int config_input(AVFilterLink *inlink)
} }
} }
if (s->all) {
for (int j = i + 1; j < s->nb_delays; j++)
s->chandelay[j].delay = s->chandelay[i].delay;
}
s->padding = s->chandelay[0].delay; s->padding = s->chandelay[0].delay;
for (i = 1; i < s->nb_delays; i++) { for (i = 1; i < s->nb_delays; i++) {
ChanDelay *d = &s->chandelay[i]; ChanDelay *d = &s->chandelay[i];