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avfilter/af_vibrato: refactor code 

Move some code out of inner loop.
This commit is contained in:
Paul B Mahol 2023-08-08 11:27:23 +02:00
parent b98ee1a355
commit c7bfc826c3
1 changed files with 28 additions and 21 deletions
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49
libavfilter/af_vibrato.c
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@ -54,9 +54,15 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
VibratoContext *s = ctx->priv;
const int wave_table_size = s->wave_table_size;
const double *wave_table = s->wave_table;
AVFilterLink *outlink = ctx->outputs[0];
const int channels = s->channels;
const int buf_size = s->buf_size;
const double depth = s->depth;
int wave_table_index = s->wave_table_index;
int buf_index = s->buf_index;
AVFrame *out;
int n, c;
const double *src;
double *dst;
@ -71,39 +77,40 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
av_frame_copy_props(out, in);
}
for (n = 0; n < in->nb_samples; n++) {
for (int n = 0; n < in->nb_samples; n++) {
int samp1_index, samp2_index;
double integer, decimal;
decimal = modf(s->depth * s->wave_table[s->wave_table_index], &integer);
decimal = modf(depth * wave_table[wave_table_index], &integer);
s->wave_table_index++;
if (s->wave_table_index >= s->wave_table_size)
s->wave_table_index -= s->wave_table_size;
wave_table_index++;
if (wave_table_index >= wave_table_size)
wave_table_index -= wave_table_size;
for (c = 0; c < inlink->ch_layout.nb_channels; c++) {
int samp1_index, samp2_index;
double *buf;
double this_samp;
samp1_index = buf_index + integer;
if (samp1_index >= buf_size)
samp1_index -= buf_size;
samp2_index = samp1_index + 1;
if (samp2_index >= buf_size)
samp2_index -= buf_size;
for (int c = 0; c < channels; c++) {
double *buf, this_samp;
src = (const double *)in->extended_data[c];
dst = (double *)out->extended_data[c];
buf = s->buf[c];
samp1_index = s->buf_index + integer;
if (samp1_index >= s->buf_size)
samp1_index -= s->buf_size;
samp2_index = samp1_index + 1;
if (samp2_index >= s->buf_size)
samp2_index -= s->buf_size;
this_samp = src[n];
dst[n] = buf[samp1_index] + (decimal * (buf[samp2_index] - buf[samp1_index]));
buf[s->buf_index] = this_samp;
buf[buf_index] = this_samp;
}
s->buf_index++;
if (s->buf_index >= s->buf_size)
s->buf_index -= s->buf_size;
buf_index++;
if (buf_index >= buf_size)
buf_index -= buf_size;
}
s->wave_table_index = wave_table_index;
s->buf_index = buf_index;
if (in != out)
av_frame_free(&in);