#include "avfilter.h"
#include "internal.h"
+enum SilenceDetect {
+ D_PEAK,
+ D_RMS,
+};
+
+enum ThresholdMode {
+ T_ANY,
+ T_ALL,
+};
+
enum SilenceMode {
SILENCE_TRIM,
SILENCE_TRIM_FLUSH,
int start_periods;
int64_t start_duration;
+ int64_t start_duration_opt;
double start_threshold;
+ int64_t start_silence;
+ int64_t start_silence_opt;
+ int start_mode;
int stop_periods;
int64_t stop_duration;
+ int64_t stop_duration_opt;
double stop_threshold;
+ int64_t stop_silence;
+ int64_t stop_silence_opt;
+ int stop_mode;
double *start_holdoff;
+ double *start_silence_hold;
size_t start_holdoff_offset;
size_t start_holdoff_end;
+ size_t start_silence_offset;
+ size_t start_silence_end;
int start_found_periods;
double *stop_holdoff;
+ double *stop_silence_hold;
size_t stop_holdoff_offset;
size_t stop_holdoff_end;
+ size_t stop_silence_offset;
+ size_t stop_silence_end;
int stop_found_periods;
double window_ratio;
int window_size;
double sum;
- int leave_silence;
int restart;
int64_t next_pts;
} SilenceRemoveContext;
#define OFFSET(x) offsetof(SilenceRemoveContext, x)
-#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
+#define AF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
+
static const AVOption silenceremove_options[] = {
- { "start_periods", NULL, OFFSET(start_periods), AV_OPT_TYPE_INT, {.i64=0}, 0, 9000, FLAGS },
- { "start_duration", NULL, OFFSET(start_duration), AV_OPT_TYPE_DURATION, {.i64=0}, 0, 9000, FLAGS },
- { "start_threshold", NULL, OFFSET(start_threshold), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, DBL_MAX, FLAGS },
- { "stop_periods", NULL, OFFSET(stop_periods), AV_OPT_TYPE_INT, {.i64=0}, -9000, 9000, FLAGS },
- { "stop_duration", NULL, OFFSET(stop_duration), AV_OPT_TYPE_DURATION, {.i64=0}, 0, 9000, FLAGS },
- { "stop_threshold", NULL, OFFSET(stop_threshold), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, DBL_MAX, FLAGS },
- { "leave_silence", NULL, OFFSET(leave_silence), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
- { "detection", NULL, OFFSET(detection), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS, "detection" },
- { "peak", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "detection" },
- { "rms", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "detection" },
- { "window", NULL, OFFSET(window_ratio), AV_OPT_TYPE_DOUBLE, {.dbl=0.02}, 0, 10, FLAGS },
+ { "start_periods", NULL, OFFSET(start_periods), AV_OPT_TYPE_INT, {.i64=0}, 0, 9000, AF },
+ { "start_duration", "set start duration of non-silence part", OFFSET(start_duration_opt), AV_OPT_TYPE_DURATION, {.i64=0}, 0, INT32_MAX, AF },
+ { "start_threshold", "set threshold for start silence detection", OFFSET(start_threshold), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, DBL_MAX, AF },
+ { "start_silence", "set start duration of silence part to keep", OFFSET(start_silence_opt), AV_OPT_TYPE_DURATION, {.i64=0}, 0, INT32_MAX, AF },
+ { "start_mode", "set which channel will trigger trimming from start", OFFSET(start_mode), AV_OPT_TYPE_INT, {.i64=T_ANY}, T_ANY, T_ALL, AF, "mode" },
+ { "any", 0, 0, AV_OPT_TYPE_CONST, {.i64=T_ANY}, 0, 0, AF, "mode" },
+ { "all", 0, 0, AV_OPT_TYPE_CONST, {.i64=T_ALL}, 0, 0, AF, "mode" },
+ { "stop_periods", NULL, OFFSET(stop_periods), AV_OPT_TYPE_INT, {.i64=0}, -9000, 9000, AF },
+ { "stop_duration", "set stop duration of non-silence part", OFFSET(stop_duration_opt), AV_OPT_TYPE_DURATION, {.i64=0}, 0, INT32_MAX, AF },
+ { "stop_threshold", "set threshold for stop silence detection", OFFSET(stop_threshold), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, DBL_MAX, AF },
+ { "stop_silence", "set stop duration of silence part to keep", OFFSET(stop_silence_opt), AV_OPT_TYPE_DURATION, {.i64=0}, 0, INT32_MAX, AF },
+ { "stop_mode", "set which channel will trigger trimming from end", OFFSET(stop_mode), AV_OPT_TYPE_INT, {.i64=T_ANY}, T_ANY, T_ALL, AF, "mode" },
+ { "detection", "set how silence is detected", OFFSET(detection), AV_OPT_TYPE_INT, {.i64=D_RMS}, D_PEAK,D_RMS, AF, "detection" },
+ { "peak", "use absolute values of samples", 0, AV_OPT_TYPE_CONST, {.i64=D_PEAK},0, 0, AF, "detection" },
+ { "rms", "use squared values of samples", 0, AV_OPT_TYPE_CONST, {.i64=D_RMS}, 0, 0, AF, "detection" },
+ { "window", "set duration of window in seconds", OFFSET(window_ratio), AV_OPT_TYPE_DOUBLE, {.dbl=0.02}, 0, 10, AF },
{ NULL }
};
}
switch (s->detection) {
- case 0:
+ case D_PEAK:
s->update = update_peak;
s->compute = compute_peak;
break;
- case 1:
+ case D_RMS:
s->update = update_rms;
s->compute = compute_rms;
break;
- };
+ }
return 0;
}
AVFilterContext *ctx = inlink->dst;
SilenceRemoveContext *s = ctx->priv;
+ s->next_pts = AV_NOPTS_VALUE;
s->window_size = FFMAX((inlink->sample_rate * s->window_ratio), 1) * inlink->channels;
s->window = av_malloc_array(s->window_size, sizeof(*s->window));
if (!s->window)
clear_window(s);
- s->start_duration = av_rescale(s->start_duration, inlink->sample_rate,
+ s->start_duration = av_rescale(s->start_duration_opt, inlink->sample_rate,
AV_TIME_BASE);
- if (s->start_duration < 0) {
- av_log(ctx, AV_LOG_WARNING, "start duration must be non-negative\n");
- s->start_duration = -s->start_duration;
- }
-
- s->stop_duration = av_rescale(s->stop_duration, inlink->sample_rate,
+ s->start_silence = av_rescale(s->start_silence_opt, inlink->sample_rate,
+ AV_TIME_BASE);
+ s->stop_duration = av_rescale(s->stop_duration_opt, inlink->sample_rate,
+ AV_TIME_BASE);
+ s->stop_silence = av_rescale(s->stop_silence_opt, inlink->sample_rate,
AV_TIME_BASE);
- if (s->stop_duration < 0) {
- av_log(ctx, AV_LOG_WARNING, "stop duration must be non-negative\n");
- s->stop_duration = -s->stop_duration;
- }
s->start_holdoff = av_malloc_array(FFMAX(s->start_duration, 1),
sizeof(*s->start_holdoff) *
if (!s->start_holdoff)
return AVERROR(ENOMEM);
+ s->start_silence_hold = av_malloc_array(FFMAX(s->start_silence, 1),
+ sizeof(*s->start_silence_hold) *
+ inlink->channels);
+ if (!s->start_silence_hold)
+ return AVERROR(ENOMEM);
+
s->start_holdoff_offset = 0;
s->start_holdoff_end = 0;
s->start_found_periods = 0;
if (!s->stop_holdoff)
return AVERROR(ENOMEM);
+ s->stop_silence_hold = av_malloc_array(FFMAX(s->stop_silence, 1),
+ sizeof(*s->stop_silence_hold) *
+ inlink->channels);
+ if (!s->stop_silence_hold)
+ return AVERROR(ENOMEM);
+
s->stop_holdoff_offset = 0;
s->stop_holdoff_end = 0;
s->stop_found_periods = 0;
static void flush(SilenceRemoveContext *s,
AVFrame *out, AVFilterLink *outlink,
- int *nb_samples_written, int *ret)
+ int *nb_samples_written, int *ret, int flush_silence)
{
+ AVFrame *silence;
+
if (*nb_samples_written) {
out->nb_samples = *nb_samples_written / outlink->channels;
outlink->time_base);
*ret = ff_filter_frame(outlink, out);
+ if (*ret < 0)
+ return;
*nb_samples_written = 0;
} else {
av_frame_free(&out);
}
+
+ if (s->stop_silence_end <= 0 || !flush_silence)
+ return;
+
+ silence = ff_get_audio_buffer(outlink, s->stop_silence_end / outlink->channels);
+ if (!silence) {
+ *ret = AVERROR(ENOMEM);
+ return;
+ }
+
+ if (s->stop_silence_offset < s->stop_silence_end) {
+ memcpy(silence->data[0],
+ &s->stop_silence_hold[s->stop_silence_offset],
+ (s->stop_silence_end - s->stop_silence_offset) * sizeof(double));
+ }
+
+ if (s->stop_silence_offset > 0) {
+ memcpy(silence->data[0] + (s->stop_silence_end - s->stop_silence_offset) * sizeof(double),
+ &s->stop_silence_hold[0],
+ s->stop_silence_offset * sizeof(double));
+ }
+
+ s->stop_silence_offset = 0;
+ s->stop_silence_end = 0;
+
+ silence->pts = s->next_pts;
+ s->next_pts += av_rescale_q(silence->nb_samples,
+ (AVRational){1, outlink->sample_rate},
+ outlink->time_base);
+
+ *ret = ff_filter_frame(outlink, silence);
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
nb_samples_read = nb_samples_written = 0;
+ if (s->next_pts == AV_NOPTS_VALUE)
+ s->next_pts = in->pts;
+
switch (s->mode) {
case SILENCE_TRIM:
silence_trim:
- nbs = in->nb_samples - nb_samples_read / inlink->channels;
+ nbs = in->nb_samples - nb_samples_read / outlink->channels;
if (!nbs)
break;
for (i = 0; i < nbs; i++) {
- threshold = 0;
- for (j = 0; j < inlink->channels; j++) {
- threshold |= s->compute(s, ibuf[j]) > s->start_threshold;
+ if (s->start_mode == T_ANY) {
+ threshold = 0;
+ for (j = 0; j < outlink->channels; j++) {
+ threshold |= s->compute(s, ibuf[j]) > s->start_threshold;
+ }
+ } else {
+ threshold = 1;
+ for (j = 0; j < outlink->channels; j++) {
+ threshold &= s->compute(s, ibuf[j]) > s->start_threshold;
+ }
}
if (threshold) {
- for (j = 0; j < inlink->channels; j++) {
+ for (j = 0; j < outlink->channels; j++) {
s->update(s, *ibuf);
s->start_holdoff[s->start_holdoff_end++] = *ibuf++;
}
- nb_samples_read += inlink->channels;
+ nb_samples_read += outlink->channels;
- if (s->start_holdoff_end >= s->start_duration * inlink->channels) {
+ if (s->start_holdoff_end >= s->start_duration * outlink->channels) {
if (++s->start_found_periods >= s->start_periods) {
s->mode = SILENCE_TRIM_FLUSH;
goto silence_trim_flush;
s->start_holdoff_offset = 0;
s->start_holdoff_end = 0;
+ s->start_silence_offset = 0;
+ s->start_silence_end = 0;
}
} else {
s->start_holdoff_end = 0;
- for (j = 0; j < inlink->channels; j++)
+ for (j = 0; j < outlink->channels; j++) {
s->update(s, ibuf[j]);
+ if (s->start_silence) {
+ s->start_silence_hold[s->start_silence_offset++] = ibuf[j];
+ s->start_silence_end = FFMIN(s->start_silence_end + 1, outlink->channels * s->start_silence);
+ if (s->start_silence_offset >= outlink->channels * s->start_silence) {
+ s->start_silence_offset = 0;
+ }
+ }
+ }
- ibuf += inlink->channels;
- nb_samples_read += inlink->channels;
+ ibuf += outlink->channels;
+ nb_samples_read += outlink->channels;
}
}
break;
case SILENCE_TRIM_FLUSH:
silence_trim_flush:
nbs = s->start_holdoff_end - s->start_holdoff_offset;
- nbs -= nbs % inlink->channels;
+ nbs -= nbs % outlink->channels;
if (!nbs)
break;
- out = ff_get_audio_buffer(inlink, nbs / inlink->channels);
+ out = ff_get_audio_buffer(outlink, nbs / outlink->channels + s->start_silence_end / outlink->channels);
if (!out) {
av_frame_free(&in);
return AVERROR(ENOMEM);
}
- memcpy(out->data[0], &s->start_holdoff[s->start_holdoff_offset],
+ if (s->start_silence_end > 0) {
+ if (s->start_silence_offset < s->start_silence_end) {
+ memcpy(out->data[0],
+ &s->start_silence_hold[s->start_silence_offset],
+ (s->start_silence_end - s->start_silence_offset) * sizeof(double));
+ }
+
+ if (s->start_silence_offset > 0) {
+ memcpy(out->data[0] + (s->start_silence_end - s->start_silence_offset) * sizeof(double),
+ &s->start_silence_hold[0],
+ s->start_silence_offset * sizeof(double));
+ }
+ }
+
+ memcpy(out->data[0] + s->start_silence_end * sizeof(double),
+ &s->start_holdoff[s->start_holdoff_offset],
nbs * sizeof(double));
out->pts = s->next_pts;
if (s->start_holdoff_offset == s->start_holdoff_end) {
s->start_holdoff_offset = 0;
s->start_holdoff_end = 0;
+ s->start_silence_offset = 0;
+ s->start_silence_end = 0;
s->mode = SILENCE_COPY;
goto silence_copy;
}
case SILENCE_COPY:
silence_copy:
- nbs = in->nb_samples - nb_samples_read / inlink->channels;
+ nbs = in->nb_samples - nb_samples_read / outlink->channels;
if (!nbs)
break;
- out = ff_get_audio_buffer(inlink, nbs);
+ out = ff_get_audio_buffer(outlink, nbs);
if (!out) {
av_frame_free(&in);
return AVERROR(ENOMEM);
if (s->stop_periods) {
for (i = 0; i < nbs; i++) {
- threshold = 1;
- for (j = 0; j < inlink->channels; j++)
- threshold &= s->compute(s, ibuf[j]) > s->stop_threshold;
+ if (s->stop_mode == T_ANY) {
+ threshold = 0;
+ for (j = 0; j < outlink->channels; j++) {
+ threshold |= s->compute(s, ibuf[j]) > s->stop_threshold;
+ }
+ } else {
+ threshold = 1;
+ for (j = 0; j < outlink->channels; j++) {
+ threshold &= s->compute(s, ibuf[j]) > s->stop_threshold;
+ }
+ }
- if (threshold && s->stop_holdoff_end && !s->leave_silence) {
+ if (threshold && s->stop_holdoff_end && !s->stop_silence) {
s->mode = SILENCE_COPY_FLUSH;
- flush(s, out, outlink, &nb_samples_written, &ret);
+ flush(s, out, outlink, &nb_samples_written, &ret, 0);
goto silence_copy_flush;
} else if (threshold) {
- for (j = 0; j < inlink->channels; j++) {
+ for (j = 0; j < outlink->channels; j++) {
s->update(s, *ibuf);
*obuf++ = *ibuf++;
}
- nb_samples_read += inlink->channels;
- nb_samples_written += inlink->channels;
+ nb_samples_read += outlink->channels;
+ nb_samples_written += outlink->channels;
} else if (!threshold) {
- for (j = 0; j < inlink->channels; j++) {
+ for (j = 0; j < outlink->channels; j++) {
s->update(s, *ibuf);
- if (s->leave_silence) {
- *obuf++ = *ibuf;
- nb_samples_written++;
+ if (s->stop_silence) {
+ s->stop_silence_hold[s->stop_silence_offset++] = *ibuf;
+ s->stop_silence_end = FFMIN(s->stop_silence_end + 1, outlink->channels * s->stop_silence);
+ if (s->stop_silence_offset >= outlink->channels * s->stop_silence) {
+ s->stop_silence_offset = 0;
+ }
}
s->stop_holdoff[s->stop_holdoff_end++] = *ibuf++;
}
- nb_samples_read += inlink->channels;
+ nb_samples_read += outlink->channels;
- if (s->stop_holdoff_end >= s->stop_duration * inlink->channels) {
+ if (s->stop_holdoff_end >= s->stop_duration * outlink->channels) {
if (++s->stop_found_periods >= s->stop_periods) {
s->stop_holdoff_offset = 0;
s->stop_holdoff_end = 0;
if (!s->restart) {
s->mode = SILENCE_STOP;
- flush(s, out, outlink, &nb_samples_written, &ret);
+ flush(s, out, outlink, &nb_samples_written, &ret, 1);
goto silence_stop;
} else {
s->stop_found_periods = 0;
s->start_found_periods = 0;
s->start_holdoff_offset = 0;
s->start_holdoff_end = 0;
+ s->start_silence_offset = 0;
+ s->start_silence_end = 0;
clear_window(s);
s->mode = SILENCE_TRIM;
- flush(s, out, outlink, &nb_samples_written, &ret);
+ flush(s, out, outlink, &nb_samples_written, &ret, 1);
goto silence_trim;
}
}
s->mode = SILENCE_COPY_FLUSH;
- flush(s, out, outlink, &nb_samples_written, &ret);
+ flush(s, out, outlink, &nb_samples_written, &ret, 0);
goto silence_copy_flush;
}
}
}
- flush(s, out, outlink, &nb_samples_written, &ret);
+ flush(s, out, outlink, &nb_samples_written, &ret, 0);
} else {
- memcpy(obuf, ibuf, sizeof(double) * nbs * inlink->channels);
+ memcpy(obuf, ibuf, sizeof(double) * nbs * outlink->channels);
out->pts = s->next_pts;
s->next_pts += av_rescale_q(out->nb_samples,
case SILENCE_COPY_FLUSH:
silence_copy_flush:
nbs = s->stop_holdoff_end - s->stop_holdoff_offset;
- nbs -= nbs % inlink->channels;
+ nbs -= nbs % outlink->channels;
if (!nbs)
break;
- out = ff_get_audio_buffer(inlink, nbs / inlink->channels);
+ out = ff_get_audio_buffer(outlink, nbs / outlink->channels);
if (!out) {
av_frame_free(&in);
return AVERROR(ENOMEM);
if (s->stop_holdoff_offset == s->stop_holdoff_end) {
s->stop_holdoff_offset = 0;
s->stop_holdoff_end = 0;
+ s->stop_silence_offset = 0;
+ s->stop_silence_end = 0;
s->mode = SILENCE_COPY;
goto silence_copy;
}
SilenceRemoveContext *s = ctx->priv;
av_freep(&s->start_holdoff);
+ av_freep(&s->start_silence_hold);
av_freep(&s->stop_holdoff);
+ av_freep(&s->stop_silence_hold);
av_freep(&s->window);
}
{ NULL }
};
-AVFilter ff_af_silenceremove = {
+const AVFilter ff_af_silenceremove = {
.name = "silenceremove",
.description = NULL_IF_CONFIG_SMALL("Remove silence."),
.priv_size = sizeof(SilenceRemoveContext),
projects / ffmpeg / blobdiff