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lavfi/afade: use AV_OPT_TYPE_DURATION

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2013-04-19 00:50:23 +00:00
parent 7e57adb464
commit b63f7b3ac7
2 changed files with 24 additions and 13 deletions
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21
doc/filters.texi
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@ -612,15 +612,26 @@ volume as the input audio, at the end of the fade-out transition
the output audio will be silence. Default is 44100.
@item start_time, st
Specify time in seconds for starting to apply the fade
effect. Default is 0.
Specify time for starting to apply the fade effect. Default is 0.
The accepted syntax is:
@example
[-]HH[:MM[:SS[.m...]]]
[-]S+[.m...]
@end example
See also the function @code{av_parse_time()}.
If set this option is used instead of @var{start_sample} one.
@item duration, d
Specify the number of seconds for which the fade effect has to last. At
the end of the fade-in effect the output audio will have the same
Specify the duration for which the fade effect has to last. Default is 0.
The accepted syntax is:
@example
[-]HH[:MM[:SS[.m...]]]
[-]S+[.m...]
@end example
See also the function @code{av_parse_time()}.
At the end of the fade-in effect the output audio will have the same
volume as the input audio, at the end of the fade-out transition
the output audio will be silence. Default is 0.
the output audio will be silence.
If set this option is used instead of @var{nb_samples} one.
@item curve

16
libavfilter/af_afade.c
View File

@ -34,8 +34,8 @@ typedef struct {
int curve;
int nb_samples;
int64_t start_sample;
double duration;
double start_time;
int64_t duration;
int64_t start_time;
void (*fade_samples)(uint8_t **dst, uint8_t * const *src,
int nb_samples, int channels, int direction,
@ -56,10 +56,10 @@ static const AVOption afade_options[] = {
{ "ss", "set expression of sample to start fading", OFFSET(start_sample), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, FLAGS },
{ "nb_samples", "set expression for fade duration in samples", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64 = 44100}, 1, INT32_MAX, FLAGS },
{ "ns", "set expression for fade duration in samples", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64 = 44100}, 1, INT32_MAX, FLAGS },
{ "start_time", "set expression of second to start fading", OFFSET(start_time), AV_OPT_TYPE_DOUBLE, {.dbl = 0. }, 0, 7*24*60*60,FLAGS },
{ "st", "set expression of second to start fading", OFFSET(start_time), AV_OPT_TYPE_DOUBLE, {.dbl = 0. }, 0, 7*24*60*60,FLAGS },
{ "duration", "set expression for fade duration in seconds", OFFSET(duration), AV_OPT_TYPE_DOUBLE, {.dbl = 0. }, 0, 24*60*60, FLAGS },
{ "d", "set expression for fade duration in seconds", OFFSET(duration), AV_OPT_TYPE_DOUBLE, {.dbl = 0. }, 0, 24*60*60, FLAGS },
{ "start_time", "set expression of time to start fading", OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
{ "st", "set expression of time to start fading", OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
{ "duration", "set expression for fade duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
{ "d", "set expression for fade duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
{ "curve", "set expression for fade curve", OFFSET(curve), AV_OPT_TYPE_INT, {.i64 = TRI }, TRI, CBR, FLAGS, "curve" },
{ "c", "set expression for fade curve", OFFSET(curve), AV_OPT_TYPE_INT, {.i64 = TRI }, TRI, CBR, FLAGS, "curve" },
{ "tri", "linear slope", 0, AV_OPT_TYPE_CONST, {.i64 = TRI }, 0, 0, FLAGS, "curve" },
@ -218,9 +218,9 @@ static int config_output(AVFilterLink *outlink)
}
if (afade->duration)
afade->nb_samples = afade->duration * inlink->sample_rate;
afade->nb_samples = afade->duration * inlink->sample_rate / AV_TIME_BASE;
if (afade->start_time)
afade->start_sample = afade->start_time * inlink->sample_rate;
afade->start_sample = afade->start_time * inlink->sample_rate / AV_TIME_BASE;
return 0;
}