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Code Issues Releases Activity

avfilter/af_asubboost: add channels option

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This commit is contained in:
Paul B Mahol
2022-05-13 22:00:08 +02:00
parent 710dce131f
commit b90341d1d5
2 changed files with 26 additions and 0 deletions
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3
doc/filters.texi
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@@ -3159,6 +3159,9 @@ Default value is 0.5.
@item delay
Set delay. Allowed range is from 1 to 100.
Default value is 20.
@item channels
Set the channels to process. Default value is all available.
@end table
@subsection Commands

23
libavfilter/af_asubboost.c
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@@ -38,6 +38,9 @@ typedef struct ASubBoostContext {
double a0, a1, a2;
double b0, b1, b2;
char *ch_layout_str;
AVChannelLayout ch_layout;
int *write_pos;
int buffer_samples;
@@ -114,9 +117,18 @@ static int filter_channels(AVFilterContext *ctx, void *arg, int jobnr, int nb_jo
double *buffer = (double *)s->buffer->extended_data[ch];
double *w = (double *)s->w->extended_data[ch];
int write_pos = s->write_pos[ch];
enum AVChannel channel = av_channel_layout_channel_from_index(&in->ch_layout, ch);
const int bypass = av_channel_layout_index_from_channel(&s->ch_layout, channel) < 0;
const double a = 0.00001;
const double b = 1. - a;
if (bypass) {
if (in != out)
memcpy(out->extended_data[ch], in->extended_data[ch],
in->nb_samples * sizeof(double));
continue;
}
for (int n = 0; n < in->nb_samples; n++) {
double out_sample, boost;
@@ -143,9 +155,18 @@ static int filter_channels(AVFilterContext *ctx, void *arg, int jobnr, int nb_jo
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
ASubBoostContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
ThreadData td;
AVFrame *out;
int ret;
ret = av_channel_layout_copy(&s->ch_layout, &inlink->ch_layout);
if (ret < 0)
return ret;
if (strcmp(s->ch_layout_str, "all"))
av_channel_layout_from_string(&s->ch_layout,
s->ch_layout_str);
if (av_frame_is_writable(in)) {
out = in;
@@ -171,6 +192,7 @@ static av_cold void uninit(AVFilterContext *ctx)
{
ASubBoostContext *s = ctx->priv;
av_channel_layout_uninit(&s->ch_layout);
av_frame_free(&s->buffer);
av_frame_free(&s->w);
av_freep(&s->write_pos);
@@ -200,6 +222,7 @@ static const AVOption asubboost_options[] = {
{ "cutoff", "set cutoff", OFFSET(cutoff), AV_OPT_TYPE_DOUBLE, {.dbl=100}, 50, 900, FLAGS },
{ "slope", "set slope", OFFSET(slope), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0.0001, 1, FLAGS },
{ "delay", "set delay", OFFSET(delay), AV_OPT_TYPE_DOUBLE, {.dbl=20}, 1, 100, FLAGS },
{ "channels", "set channels to filter", OFFSET(ch_layout_str), AV_OPT_TYPE_STRING, {.str="all"}, 0, 0, FLAGS },
{ NULL }
};