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Code Issues Releases Activity

avfilter/asrc_sinc: switch to rdft from lavu/tx

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This commit is contained in:
Paul B Mahol 2022-02-06 12:43:16 +01:00
parent cfe6df99fa
commit e597ea4c0e
2 changed files with 17 additions and 22 deletions
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2
configure vendored
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@ -3718,8 +3718,6 @@ showcqt_filter_suggest="libfontconfig libfreetype"
showspatial_filter_deps="avcodec"
showspatial_filter_select="fft"
signature_filter_deps="gpl avcodec avformat"
sinc_filter_deps="avcodec"
sinc_filter_select="rdft"
smartblur_filter_deps="gpl swscale"
sobel_opencl_filter_deps="opencl"
sofalizer_filter_deps="libmysofa"

37
libavfilter/asrc_sinc.c
View File

@ -22,8 +22,7 @@
#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "libavcodec/avfft.h"
#include "libavutil/tx.h"
#include "audio.h"
#include "avfilter.h"
@ -42,7 +41,8 @@ typedef struct SincContext {
float *coeffs;
int64_t pts;
RDFTContext *rdft, *irdft;
AVTXContext *tx, *itx;
av_tx_fn tx_fn, itx_fn;
} SincContext;
static int activate(AVFilterContext *ctx)
@ -216,7 +216,7 @@ static int fir_to_phase(SincContext *s, float **h, int *len, int *post_len, floa
{
float *pi_wraps, *work, phase1 = (phase > 50.f ? 100.f - phase : phase) / 50.f;
int i, work_len, begin, end, imp_peak = 0, peak = 0;
float imp_sum = 0, peak_imp_sum = 0;
float imp_sum = 0, peak_imp_sum = 0, scale = 1.f;
float prev_angle2 = 0, cum_2pi = 0, prev_angle1 = 0, cum_1pi = 0;
for (i = *len, work_len = 2 * 2 * 8; i > 1; work_len <<= 1, i >>= 1);
@ -229,17 +229,16 @@ static int fir_to_phase(SincContext *s, float **h, int *len, int *post_len, floa
memcpy(work, *h, *len * sizeof(*work));
av_rdft_end(s->rdft);
av_rdft_end(s->irdft);
s->rdft = s->irdft = NULL;
s->rdft = av_rdft_init(av_log2(work_len), DFT_R2C);
s->irdft = av_rdft_init(av_log2(work_len), IDFT_C2R);
if (!s->rdft || !s->irdft) {
av_tx_uninit(&s->tx);
av_tx_uninit(&s->itx);
av_tx_init(&s->tx, &s->tx_fn, AV_TX_FLOAT_RDFT, 0, work_len, &scale, AV_TX_INPLACE);
av_tx_init(&s->itx, &s->itx_fn, AV_TX_FLOAT_RDFT, 1, work_len, &scale, AV_TX_INPLACE);
if (!s->tx || !s->itx) {
av_free(work);
return AVERROR(ENOMEM);
}
av_rdft_calc(s->rdft, work); /* Cepstral: */
s->tx_fn(s->tx, work, work, sizeof(float)); /* Cepstral: */
UNPACK(work, work_len);
for (i = 0; i <= work_len; i += 2) {
@ -263,7 +262,7 @@ static int fir_to_phase(SincContext *s, float **h, int *len, int *post_len, floa
}
PACK(work, work_len);
av_rdft_calc(s->irdft, work);
s->itx_fn(s->itx, work, work, sizeof(float));
for (i = 0; i < work_len; i++)
work[i] *= 2.f / work_len;
@ -272,7 +271,7 @@ static int fir_to_phase(SincContext *s, float **h, int *len, int *post_len, floa
work[i] *= 2;
work[i + work_len / 2] = 0;
}
av_rdft_calc(s->rdft, work);
s->tx_fn(s->tx, work, work, sizeof(float));
for (i = 2; i < work_len; i += 2) /* Interpolate between linear & min phase */
work[i + 1] = phase1 * i / work_len * pi_wraps[work_len >> 1] + (1 - phase1) * (work[i + 1] + pi_wraps[i >> 1]) - pi_wraps[i >> 1];
@ -286,7 +285,7 @@ static int fir_to_phase(SincContext *s, float **h, int *len, int *post_len, floa
work[i + 1] = x * sinf(work[i + 1]);
}
av_rdft_calc(s->irdft, work);
s->itx_fn(s->itx, work, work, sizeof(float));
for (i = 0; i < work_len; i++)
work[i] *= 2.f / work_len;
@ -390,9 +389,8 @@ static int config_output(AVFilterLink *outlink)
s->coeffs[i] = h[longer][i];
av_free(h[longer]);
av_rdft_end(s->rdft);
av_rdft_end(s->irdft);
s->rdft = s->irdft = NULL;
av_tx_uninit(&s->tx);
av_tx_uninit(&s->itx);
return 0;
}
@ -402,9 +400,8 @@ static av_cold void uninit(AVFilterContext *ctx)
SincContext *s = ctx->priv;
av_freep(&s->coeffs);
av_rdft_end(s->rdft);
av_rdft_end(s->irdft);
s->rdft = s->irdft = NULL;
av_tx_uninit(&s->tx);
av_tx_uninit(&s->itx);
}
static const AVFilterPad sinc_outputs[] = {