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avfilter/af_afir: rework FIR gain measurement 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2017-12-31 19:09:07 +01:00
parent 0e1f771d22
commit f3552c3b9d
1 changed files with 19 additions and 5 deletions
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24
libavfilter/af_afir.c
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@ -105,7 +105,7 @@ static int fir_channel(AVFilterContext *ctx, void *arg, int ch, int nb_jobs)
if (out) {
float *ptr = (float *)out->extended_data[ch];
s->fdsp->vector_fmul_scalar(ptr, dst, s->gain * s->wet_gain, FFALIGN(out->nb_samples, 4));
s->fdsp->vector_fmul_scalar(ptr, dst, s->wet_gain, FFALIGN(out->nb_samples, 4));
emms_c();
}
@ -166,7 +166,6 @@ static int convert_coeffs(AVFilterContext *ctx)
{
AudioFIRContext *s = ctx->priv;
int i, ch, n, N;
float power = 0;
s->nb_taps = av_audio_fifo_size(s->fifo[1]);
if (s->nb_taps <= 0)
@ -217,13 +216,29 @@ static int convert_coeffs(AVFilterContext *ctx)
av_audio_fifo_read(s->fifo[1], (void **)s->in[1]->extended_data, s->nb_taps);
if (s->again) {
float power = 0;
for (ch = 0; ch < ctx->inputs[1]->channels; ch++) {
float *time = (float *)s->in[1]->extended_data[!s->one2many * ch];
for (i = 0; i < s->nb_taps; i++)
power += FFABS(time[i]);
}
s->gain = sqrtf(1.f / (ctx->inputs[1]->channels * power)) / (sqrtf(ctx->inputs[1]->channels));
for (ch = 0; ch < ctx->inputs[1]->channels; ch++) {
float *time = (float *)s->in[1]->extended_data[!s->one2many * ch];
s->fdsp->vector_fmul_scalar(time, time, s->gain, FFALIGN(s->nb_taps, 4));
}
}
for (ch = 0; ch < ctx->inputs[1]->channels; ch++) {
float *time = (float *)s->in[1]->extended_data[!s->one2many * ch];
float *block = s->block[ch];
FFTComplex *coeff = s->coeff[ch];
power += s->fdsp->scalarproduct_float(time, time, s->nb_taps);
for (i = FFMAX(1, s->length * s->nb_taps); i < s->nb_taps; i++)
time[i] = 0;
@ -252,7 +267,6 @@ static int convert_coeffs(AVFilterContext *ctx)
}
av_frame_free(&s->in[1]);
s->gain = s->again ? 1.f / sqrtf(power / ctx->inputs[1]->channels) : 1.f;
av_log(ctx, AV_LOG_DEBUG, "nb_taps: %d\n", s->nb_taps);
av_log(ctx, AV_LOG_DEBUG, "nb_partitions: %d\n", s->nb_partitions);
av_log(ctx, AV_LOG_DEBUG, "partition size: %d\n", s->part_size);