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Code Issues Releases Activity

avfilter/afir_template: avoid multiplications if memcpy is enough

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This commit is contained in:
Paul B Mahol 2023-04-27 22:47:31 +02:00
parent 19148a5b9f
commit 4e57a0f35a
1 changed files with 8 additions and 5 deletions
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13
libavfilter/afir_template.c
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@ -294,6 +294,7 @@ static int fn(fir_quantum)(AVFilterContext *ctx, AVFrame *out, int ch, int ioffs
const int nb_samples = FFMIN(min_part_size, out->nb_samples - offset);
const int nb_segments = s->nb_segments[selir];
const float dry_gain = s->dry_gain;
const float wet_gain = s->wet_gain;
for (int segment = 0; segment < nb_segments; segment++) {
AudioFIRSegment *seg = &s->seg[selir][segment];
@ -310,7 +311,9 @@ static int fn(fir_quantum)(AVFilterContext *ctx, AVFrame *out, int ch, int ioffs
int j;
seg->part_index[ch] = seg->part_index[ch] % nb_partitions;
if (min_part_size >= 8) {
if (dry_gain == 1.f) {
memcpy(src + input_offset, in, nb_samples * sizeof(*src));
} else if (min_part_size >= 8) {
#if DEPTH == 32
s->fdsp->vector_fmul_scalar(src + input_offset, in, dry_gain, FFALIGN(nb_samples, 4));
#else
@ -374,19 +377,19 @@ static int fn(fir_quantum)(AVFilterContext *ctx, AVFrame *out, int ch, int ioffs
seg->part_index[ch] = (seg->part_index[ch] + 1) % nb_partitions;
}
if (s->wet_gain == 1.f)
if (wet_gain == 1.f)
return 0;
if (min_part_size >= 8) {
#if DEPTH == 32
s->fdsp->vector_fmul_scalar(ptr, ptr, s->wet_gain, FFALIGN(nb_samples, 4));
s->fdsp->vector_fmul_scalar(ptr, ptr, wet_gain, FFALIGN(nb_samples, 4));
#else
s->fdsp->vector_dmul_scalar(ptr, ptr, s->wet_gain, FFALIGN(nb_samples, 8));
s->fdsp->vector_dmul_scalar(ptr, ptr, wet_gain, FFALIGN(nb_samples, 8));
#endif
emms_c();
} else {
for (int n = 0; n < nb_samples; n++)
ptr[n] *= s->wet_gain;
ptr[n] *= wet_gain;
}
return 0;