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avfilter/af_silenceremove: fix processing of periods > 1

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This commit is contained in:
Paul B Mahol 2021-09-08 13:06:43 +02:00
parent 5e7e2e5031
commit 3b331468da
1 changed files with 18 additions and 5 deletions
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23
libavfilter/af_silenceremove.c
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@ -93,6 +93,8 @@ typedef struct SilenceRemoveContext {
int64_t window_duration;
double sum;
int threshold;
int one_period;
int restart;
int64_t next_pts;
@ -107,14 +109,14 @@ typedef struct SilenceRemoveContext {
#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, AF },
{ "start_periods", "set periods of silence parts to skip from start", 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_periods", "set periods of silence parts to skip from end", 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 },
@ -430,6 +432,7 @@ static int config_input(AVFilterLink *inlink)
AVFilterContext *ctx = inlink->dst;
SilenceRemoveContext *s = ctx->priv;
s->threshold = -1;
s->next_pts = AV_NOPTS_VALUE;
s->window_duration = av_rescale(s->window_duration_opt, inlink->sample_rate,
AV_TIME_BASE);
@ -603,8 +606,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
SilenceRemoveContext *s = ctx->priv;
int i, j, threshold, ret = 0;
int nbs, nb_samples_read, nb_samples_written;
int i, j, threshold, ret = 0;
AVFrame *out;
nb_samples_read = nb_samples_written = 0;
@ -632,6 +635,10 @@ silence_trim:
}
}
if (s->threshold >= 0)
s->one_period = s->threshold != threshold;
s->threshold = threshold;
if (threshold) {
for (j = 0; j < outlink->channels; j++) {
s->update(s, in, j, nb_samples_read);
@ -645,7 +652,8 @@ silence_trim:
nb_samples_read++;
if (s->start_holdoff_end >= s->start_duration) {
if (++s->start_found_periods >= s->start_periods) {
s->start_found_periods += s->one_period;
if (s->start_found_periods >= s->start_periods) {
s->mode = SILENCE_TRIM_FLUSH;
goto silence_trim_flush;
}
@ -757,6 +765,10 @@ silence_copy:
}
}
if (s->threshold >= 0)
s->one_period = s->threshold != threshold;
s->threshold = threshold;
if (threshold && s->stop_holdoff_end && !s->stop_silence) {
s->mode = SILENCE_COPY_FLUSH;
flush(s, out, outlink, &nb_samples_written, &ret, 0);
@ -793,7 +805,8 @@ silence_copy:
s->stop_holdoff_end++;
if (s->stop_holdoff_end >= s->stop_duration) {
if (++s->stop_found_periods >= s->stop_periods) {
s->stop_found_periods += s->one_period;
if (s->stop_found_periods >= s->stop_periods) {
s->stop_holdoff_offset = 0;
s->stop_holdoff_end = 0;