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avfilter/af_silencedetect: use AV_OPT_TYPE_DURATION

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Reviewed-by: Moritz Barsnick <barsnick@gmx.net>
Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
pull/324/head
Limin Wang 5 years ago committed by Gyan Doshi
parent c6e01ebe41
commit 190f52ba3b
3 changed files with 10 additions and 6 deletions
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  1. 4
      doc/filters.texi
  2. 10
      libavfilter/af_silencedetect.c
  3. 2
      tests/fate/filter-video.mak

4
doc/filters.texi
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@ -4702,7 +4702,9 @@ Set noise tolerance. Can be specified in dB (in case "dB" is appended to the
specified value) or amplitude ratio. Default is -60dB, or 0.001.
@item duration, d
Set silence duration until notification (default is 2 seconds).
Set silence duration until notification (default is 2 seconds). See
@ref{time duration syntax,,the Time duration section in the ffmpeg-utils(1) manual,ffmpeg-utils}
for the accepted syntax.
@item mono, m
Process each channel separately, instead of combined. By default is disabled.

10
libavfilter/af_silencedetect.c
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@ -35,7 +35,7 @@
typedef struct SilenceDetectContext {
const AVClass *class;
double noise; ///< noise amplitude ratio
double duration; ///< minimum duration of silence until notification
int64_t duration; ///< minimum duration of silence until notification
int mono; ///< mono mode : check each channel separately (default = check when ALL channels are silent)
int channels; ///< number of channels
int independent_channels; ///< number of entries in following arrays (always 1 in mono mode)
@ -50,13 +50,14 @@ typedef struct SilenceDetectContext {
AVRational time_base);
} SilenceDetectContext;
#define MAX_DURATION (24*3600*1000000LL)
#define OFFSET(x) offsetof(SilenceDetectContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
static const AVOption silencedetect_options[] = {
{ "n", "set noise tolerance", OFFSET(noise), AV_OPT_TYPE_DOUBLE, {.dbl=0.001}, 0, DBL_MAX, FLAGS },
{ "noise", "set noise tolerance", OFFSET(noise), AV_OPT_TYPE_DOUBLE, {.dbl=0.001}, 0, DBL_MAX, FLAGS },
{ "d", "set minimum duration in seconds", OFFSET(duration), AV_OPT_TYPE_DOUBLE, {.dbl=2.}, 0, 24*60*60, FLAGS },
{ "duration", "set minimum duration in seconds", OFFSET(duration), AV_OPT_TYPE_DOUBLE, {.dbl=2.}, 0, 24*60*60, FLAGS },
{ "d", "set minimum duration in seconds", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=2000000}, 0, MAX_DURATION,FLAGS },
{ "duration", "set minimum duration in seconds", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=2000000}, 0, MAX_DURATION,FLAGS },
{ "mono", "check each channel separately", OFFSET(mono), AV_OPT_TYPE_BOOL, {.i64=0.}, 0, 1, FLAGS },
{ "m", "check each channel separately", OFFSET(mono), AV_OPT_TYPE_BOOL, {.i64=0.}, 0, 1, FLAGS },
{ NULL }
@ -142,6 +143,7 @@ static int config_input(AVFilterLink *inlink)
int c;
s->channels = inlink->channels;
s->duration = av_rescale(s->duration, inlink->sample_rate, AV_TIME_BASE);
s->independent_channels = s->mono ? s->channels : 1;
s->nb_null_samples = av_mallocz_array(sizeof(*s->nb_null_samples), s->independent_channels);
if (!s->nb_null_samples)
@ -174,7 +176,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
const int nb_channels = inlink->channels;
const int srate = inlink->sample_rate;
const int nb_samples = insamples->nb_samples * nb_channels;
const int64_t nb_samples_notify = srate * s->duration * (s->mono ? 1 : nb_channels);
const int64_t nb_samples_notify = s->duration * (s->mono ? 1 : nb_channels);
int c;
// scale number of null samples to the new sample rate

2
tests/fate/filter-video.mak
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@ -747,7 +747,7 @@ fate-filter-metadata-cropdetect: CMD = run $(FILTER_METADATA_COMMAND) "sws_flags
SILENCEDETECT_DEPS = FFPROBE AVDEVICE LAVFI_INDEV AMOVIE_FILTER TTA_DEMUXER TTA_DECODER SILENCEDETECT_FILTER
FATE_METADATA_FILTER-$(call ALLYES, $(SILENCEDETECT_DEPS)) += fate-filter-metadata-silencedetect
fate-filter-metadata-silencedetect: SRC = $(TARGET_SAMPLES)/lossless-audio/inside.tta
fate-filter-metadata-silencedetect: CMD = run $(FILTER_METADATA_COMMAND) "amovie='$(SRC)',silencedetect=n=-33.5dB:d=.2"
fate-filter-metadata-silencedetect: CMD = run $(FILTER_METADATA_COMMAND) "amovie='$(SRC)',silencedetect=n=-33.5dB:d=0.2"
EBUR128_METADATA_DEPS = FFPROBE AVDEVICE LAVFI_INDEV AMOVIE_FILTER FLAC_DEMUXER FLAC_DECODER EBUR128_FILTER
FATE_METADATA_FILTER-$(call ALLYES, $(EBUR128_METADATA_DEPS)) += fate-filter-metadata-ebur128

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