mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
968 lines
36 KiB
968 lines
36 KiB
/* |
|
* Copyright (c) 2016 Muhammad Faiz <mfcc64@gmail.com> |
|
* |
|
* This file is part of FFmpeg. |
|
* |
|
* FFmpeg is free software; you can redistribute it and/or |
|
* modify it under the terms of the GNU Lesser General Public |
|
* License as published by the Free Software Foundation; either |
|
* version 2.1 of the License, or (at your option) any later version. |
|
* |
|
* FFmpeg is distributed in the hope that it will be useful, |
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
* Lesser General Public License for more details. |
|
* |
|
* You should have received a copy of the GNU Lesser General Public |
|
* License along with FFmpeg; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
#include "libavutil/channel_layout.h" |
|
#include "libavutil/file_open.h" |
|
#include "libavutil/mem.h" |
|
#include "libavutil/opt.h" |
|
#include "libavutil/eval.h" |
|
#include "libavutil/avassert.h" |
|
#include "libavutil/tx.h" |
|
#include "avfilter.h" |
|
#include "filters.h" |
|
#include "audio.h" |
|
|
|
#define RDFT_BITS_MIN 4 |
|
#define RDFT_BITS_MAX 16 |
|
|
|
enum WindowFunc { |
|
WFUNC_RECTANGULAR, |
|
WFUNC_HANN, |
|
WFUNC_HAMMING, |
|
WFUNC_BLACKMAN, |
|
WFUNC_NUTTALL3, |
|
WFUNC_MNUTTALL3, |
|
WFUNC_NUTTALL, |
|
WFUNC_BNUTTALL, |
|
WFUNC_BHARRIS, |
|
WFUNC_TUKEY, |
|
NB_WFUNC |
|
}; |
|
|
|
enum Scale { |
|
SCALE_LINLIN, |
|
SCALE_LINLOG, |
|
SCALE_LOGLIN, |
|
SCALE_LOGLOG, |
|
NB_SCALE |
|
}; |
|
|
|
#define NB_GAIN_ENTRY_MAX 4096 |
|
typedef struct GainEntry { |
|
double freq; |
|
double gain; |
|
} GainEntry; |
|
|
|
typedef struct OverlapIndex { |
|
int buf_idx; |
|
int overlap_idx; |
|
} OverlapIndex; |
|
|
|
typedef struct FIREqualizerContext { |
|
const AVClass *class; |
|
|
|
AVTXContext *analysis_rdft; |
|
av_tx_fn analysis_rdft_fn; |
|
AVTXContext *analysis_irdft; |
|
av_tx_fn analysis_irdft_fn; |
|
AVTXContext *rdft; |
|
av_tx_fn rdft_fn; |
|
AVTXContext *irdft; |
|
av_tx_fn irdft_fn; |
|
AVTXContext *fft_ctx; |
|
av_tx_fn fft_fn; |
|
AVTXContext *cepstrum_rdft; |
|
av_tx_fn cepstrum_rdft_fn; |
|
AVTXContext *cepstrum_irdft; |
|
av_tx_fn cepstrum_irdft_fn; |
|
int analysis_rdft_len; |
|
int rdft_len; |
|
int cepstrum_len; |
|
|
|
float *analysis_buf; |
|
float *analysis_tbuf; |
|
float *dump_buf; |
|
float *kernel_tmp_buf; |
|
float *kernel_tmp_tbuf; |
|
float *kernel_buf; |
|
float *tx_buf; |
|
float *cepstrum_buf; |
|
float *cepstrum_tbuf; |
|
float *conv_buf; |
|
OverlapIndex *conv_idx; |
|
int fir_len; |
|
int nsamples_max; |
|
int64_t next_pts; |
|
int frame_nsamples_max; |
|
int remaining; |
|
|
|
char *gain_cmd; |
|
char *gain_entry_cmd; |
|
const char *gain; |
|
const char *gain_entry; |
|
double delay; |
|
double accuracy; |
|
int wfunc; |
|
int fixed; |
|
int multi; |
|
int zero_phase; |
|
int scale; |
|
char *dumpfile; |
|
int dumpscale; |
|
int fft2; |
|
int min_phase; |
|
|
|
int nb_gain_entry; |
|
int gain_entry_err; |
|
GainEntry gain_entry_tbl[NB_GAIN_ENTRY_MAX]; |
|
} FIREqualizerContext; |
|
|
|
#define OFFSET(x) offsetof(FIREqualizerContext, x) |
|
#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
|
#define TFLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM |
|
|
|
static const AVOption firequalizer_options[] = { |
|
{ "gain", "set gain curve", OFFSET(gain), AV_OPT_TYPE_STRING, { .str = "gain_interpolate(f)" }, 0, 0, TFLAGS }, |
|
{ "gain_entry", "set gain entry", OFFSET(gain_entry), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, TFLAGS }, |
|
{ "delay", "set delay", OFFSET(delay), AV_OPT_TYPE_DOUBLE, { .dbl = 0.01 }, 0.0, 1e10, FLAGS }, |
|
{ "accuracy", "set accuracy", OFFSET(accuracy), AV_OPT_TYPE_DOUBLE, { .dbl = 5.0 }, 0.0, 1e10, FLAGS }, |
|
{ "wfunc", "set window function", OFFSET(wfunc), AV_OPT_TYPE_INT, { .i64 = WFUNC_HANN }, 0, NB_WFUNC-1, FLAGS, .unit = "wfunc" }, |
|
{ "rectangular", "rectangular window", 0, AV_OPT_TYPE_CONST, { .i64 = WFUNC_RECTANGULAR }, 0, 0, FLAGS, .unit = "wfunc" }, |
|
{ "hann", "hann window", 0, AV_OPT_TYPE_CONST, { .i64 = WFUNC_HANN }, 0, 0, FLAGS, .unit = "wfunc" }, |
|
{ "hamming", "hamming window", 0, AV_OPT_TYPE_CONST, { .i64 = WFUNC_HAMMING }, 0, 0, FLAGS, .unit = "wfunc" }, |
|
{ "blackman", "blackman window", 0, AV_OPT_TYPE_CONST, { .i64 = WFUNC_BLACKMAN }, 0, 0, FLAGS, .unit = "wfunc" }, |
|
{ "nuttall3", "3-term nuttall window", 0, AV_OPT_TYPE_CONST, { .i64 = WFUNC_NUTTALL3 }, 0, 0, FLAGS, .unit = "wfunc" }, |
|
{ "mnuttall3", "minimum 3-term nuttall window", 0, AV_OPT_TYPE_CONST, { .i64 = WFUNC_MNUTTALL3 }, 0, 0, FLAGS, .unit = "wfunc" }, |
|
{ "nuttall", "nuttall window", 0, AV_OPT_TYPE_CONST, { .i64 = WFUNC_NUTTALL }, 0, 0, FLAGS, .unit = "wfunc" }, |
|
{ "bnuttall", "blackman-nuttall window", 0, AV_OPT_TYPE_CONST, { .i64 = WFUNC_BNUTTALL }, 0, 0, FLAGS, .unit = "wfunc" }, |
|
{ "bharris", "blackman-harris window", 0, AV_OPT_TYPE_CONST, { .i64 = WFUNC_BHARRIS }, 0, 0, FLAGS, .unit = "wfunc" }, |
|
{ "tukey", "tukey window", 0, AV_OPT_TYPE_CONST, { .i64 = WFUNC_TUKEY }, 0, 0, FLAGS, .unit = "wfunc" }, |
|
{ "fixed", "set fixed frame samples", OFFSET(fixed), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS }, |
|
{ "multi", "set multi channels mode", OFFSET(multi), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS }, |
|
{ "zero_phase", "set zero phase mode", OFFSET(zero_phase), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS }, |
|
{ "scale", "set gain scale", OFFSET(scale), AV_OPT_TYPE_INT, { .i64 = SCALE_LINLOG }, 0, NB_SCALE-1, FLAGS, .unit = "scale" }, |
|
{ "linlin", "linear-freq linear-gain", 0, AV_OPT_TYPE_CONST, { .i64 = SCALE_LINLIN }, 0, 0, FLAGS, .unit = "scale" }, |
|
{ "linlog", "linear-freq logarithmic-gain", 0, AV_OPT_TYPE_CONST, { .i64 = SCALE_LINLOG }, 0, 0, FLAGS, .unit = "scale" }, |
|
{ "loglin", "logarithmic-freq linear-gain", 0, AV_OPT_TYPE_CONST, { .i64 = SCALE_LOGLIN }, 0, 0, FLAGS, .unit = "scale" }, |
|
{ "loglog", "logarithmic-freq logarithmic-gain", 0, AV_OPT_TYPE_CONST, { .i64 = SCALE_LOGLOG }, 0, 0, FLAGS, .unit = "scale" }, |
|
{ "dumpfile", "set dump file", OFFSET(dumpfile), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, FLAGS }, |
|
{ "dumpscale", "set dump scale", OFFSET(dumpscale), AV_OPT_TYPE_INT, { .i64 = SCALE_LINLOG }, 0, NB_SCALE-1, FLAGS, .unit = "scale" }, |
|
{ "fft2", "set 2-channels fft", OFFSET(fft2), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS }, |
|
{ "min_phase", "set minimum phase mode", OFFSET(min_phase), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS }, |
|
{ NULL } |
|
}; |
|
|
|
AVFILTER_DEFINE_CLASS(firequalizer); |
|
|
|
static void common_uninit(FIREqualizerContext *s) |
|
{ |
|
av_tx_uninit(&s->analysis_rdft); |
|
av_tx_uninit(&s->analysis_irdft); |
|
av_tx_uninit(&s->rdft); |
|
av_tx_uninit(&s->irdft); |
|
av_tx_uninit(&s->fft_ctx); |
|
av_tx_uninit(&s->cepstrum_rdft); |
|
av_tx_uninit(&s->cepstrum_irdft); |
|
s->analysis_rdft = s->analysis_irdft = s->rdft = s->irdft = NULL; |
|
s->fft_ctx = NULL; |
|
s->cepstrum_rdft = NULL; |
|
s->cepstrum_irdft = NULL; |
|
|
|
av_freep(&s->analysis_buf); |
|
av_freep(&s->analysis_tbuf); |
|
av_freep(&s->dump_buf); |
|
av_freep(&s->kernel_tmp_buf); |
|
av_freep(&s->kernel_tmp_tbuf); |
|
av_freep(&s->kernel_buf); |
|
av_freep(&s->tx_buf); |
|
av_freep(&s->cepstrum_buf); |
|
av_freep(&s->cepstrum_tbuf); |
|
av_freep(&s->conv_buf); |
|
av_freep(&s->conv_idx); |
|
} |
|
|
|
static av_cold void uninit(AVFilterContext *ctx) |
|
{ |
|
FIREqualizerContext *s = ctx->priv; |
|
|
|
common_uninit(s); |
|
av_freep(&s->gain_cmd); |
|
av_freep(&s->gain_entry_cmd); |
|
} |
|
|
|
static void fast_convolute(FIREqualizerContext *restrict s, const float *restrict kernel_buf, float *restrict conv_buf, |
|
OverlapIndex *restrict idx, float *restrict data, int nsamples) |
|
{ |
|
if (nsamples <= s->nsamples_max) { |
|
float *buf = conv_buf + idx->buf_idx * s->rdft_len; |
|
float *obuf = conv_buf + !idx->buf_idx * s->rdft_len + idx->overlap_idx; |
|
float *tbuf = s->tx_buf; |
|
int center = s->fir_len/2; |
|
int k; |
|
|
|
memset(buf, 0, center * sizeof(*data)); |
|
memcpy(buf + center, data, nsamples * sizeof(*data)); |
|
memset(buf + center + nsamples, 0, (s->rdft_len - nsamples - center) * sizeof(*data)); |
|
s->rdft_fn(s->rdft, tbuf, buf, sizeof(float)); |
|
|
|
for (k = 0; k <= s->rdft_len/2; k++) { |
|
tbuf[2*k] *= kernel_buf[k]; |
|
tbuf[2*k+1] *= kernel_buf[k]; |
|
} |
|
|
|
s->irdft_fn(s->irdft, buf, tbuf, sizeof(AVComplexFloat)); |
|
for (k = 0; k < s->rdft_len - idx->overlap_idx; k++) |
|
buf[k] += obuf[k]; |
|
memcpy(data, buf, nsamples * sizeof(*data)); |
|
idx->buf_idx = !idx->buf_idx; |
|
idx->overlap_idx = nsamples; |
|
} else { |
|
while (nsamples > s->nsamples_max * 2) { |
|
fast_convolute(s, kernel_buf, conv_buf, idx, data, s->nsamples_max); |
|
data += s->nsamples_max; |
|
nsamples -= s->nsamples_max; |
|
} |
|
fast_convolute(s, kernel_buf, conv_buf, idx, data, nsamples/2); |
|
fast_convolute(s, kernel_buf, conv_buf, idx, data + nsamples/2, nsamples - nsamples/2); |
|
} |
|
} |
|
|
|
static void fast_convolute_nonlinear(FIREqualizerContext *restrict s, const float *restrict kernel_buf, |
|
float *restrict conv_buf, OverlapIndex *restrict idx, |
|
float *restrict data, int nsamples) |
|
{ |
|
if (nsamples <= s->nsamples_max) { |
|
float *buf = conv_buf + idx->buf_idx * s->rdft_len; |
|
float *obuf = conv_buf + !idx->buf_idx * s->rdft_len + idx->overlap_idx; |
|
float *tbuf = s->tx_buf; |
|
int k; |
|
|
|
memcpy(buf, data, nsamples * sizeof(*data)); |
|
memset(buf + nsamples, 0, (s->rdft_len - nsamples) * sizeof(*data)); |
|
s->rdft_fn(s->rdft, tbuf, buf, sizeof(float)); |
|
|
|
for (k = 0; k < s->rdft_len + 2; k += 2) { |
|
float re, im; |
|
re = tbuf[k] * kernel_buf[k] - tbuf[k+1] * kernel_buf[k+1]; |
|
im = tbuf[k] * kernel_buf[k+1] + tbuf[k+1] * kernel_buf[k]; |
|
tbuf[k] = re; |
|
tbuf[k+1] = im; |
|
} |
|
|
|
s->irdft_fn(s->irdft, buf, tbuf, sizeof(AVComplexFloat)); |
|
for (k = 0; k < s->rdft_len - idx->overlap_idx; k++) |
|
buf[k] += obuf[k]; |
|
memcpy(data, buf, nsamples * sizeof(*data)); |
|
idx->buf_idx = !idx->buf_idx; |
|
idx->overlap_idx = nsamples; |
|
} else { |
|
while (nsamples > s->nsamples_max * 2) { |
|
fast_convolute_nonlinear(s, kernel_buf, conv_buf, idx, data, s->nsamples_max); |
|
data += s->nsamples_max; |
|
nsamples -= s->nsamples_max; |
|
} |
|
fast_convolute_nonlinear(s, kernel_buf, conv_buf, idx, data, nsamples/2); |
|
fast_convolute_nonlinear(s, kernel_buf, conv_buf, idx, data + nsamples/2, nsamples - nsamples/2); |
|
} |
|
} |
|
|
|
static void fast_convolute2(FIREqualizerContext *restrict s, const float *restrict kernel_buf, AVComplexFloat *restrict conv_buf, |
|
OverlapIndex *restrict idx, float *restrict data0, float *restrict data1, int nsamples) |
|
{ |
|
if (nsamples <= s->nsamples_max) { |
|
AVComplexFloat *buf = conv_buf + idx->buf_idx * s->rdft_len; |
|
AVComplexFloat *obuf = conv_buf + !idx->buf_idx * s->rdft_len + idx->overlap_idx; |
|
AVComplexFloat *tbuf = (AVComplexFloat *)s->tx_buf; |
|
int center = s->fir_len/2; |
|
int k; |
|
float tmp; |
|
|
|
memset(buf, 0, center * sizeof(*buf)); |
|
for (k = 0; k < nsamples; k++) { |
|
buf[center+k].re = data0[k]; |
|
buf[center+k].im = data1[k]; |
|
} |
|
memset(buf + center + nsamples, 0, (s->rdft_len - nsamples - center) * sizeof(*buf)); |
|
s->fft_fn(s->fft_ctx, tbuf, buf, sizeof(AVComplexFloat)); |
|
|
|
/* swap re <-> im, do backward fft using forward fft_ctx */ |
|
/* normalize with 0.5f */ |
|
tmp = tbuf[0].re; |
|
tbuf[0].re = 0.5f * kernel_buf[0] * tbuf[0].im; |
|
tbuf[0].im = 0.5f * kernel_buf[0] * tmp; |
|
for (k = 1; k < s->rdft_len/2; k++) { |
|
int m = s->rdft_len - k; |
|
tmp = tbuf[k].re; |
|
tbuf[k].re = 0.5f * kernel_buf[k] * tbuf[k].im; |
|
tbuf[k].im = 0.5f * kernel_buf[k] * tmp; |
|
tmp = tbuf[m].re; |
|
tbuf[m].re = 0.5f * kernel_buf[k] * tbuf[m].im; |
|
tbuf[m].im = 0.5f * kernel_buf[k] * tmp; |
|
} |
|
tmp = tbuf[k].re; |
|
tbuf[k].re = 0.5f * kernel_buf[k] * tbuf[k].im; |
|
tbuf[k].im = 0.5f * kernel_buf[k] * tmp; |
|
|
|
s->fft_fn(s->fft_ctx, buf, tbuf, sizeof(AVComplexFloat)); |
|
|
|
for (k = 0; k < s->rdft_len - idx->overlap_idx; k++) { |
|
buf[k].re += obuf[k].re; |
|
buf[k].im += obuf[k].im; |
|
} |
|
|
|
/* swapped re <-> im */ |
|
for (k = 0; k < nsamples; k++) { |
|
data0[k] = buf[k].im; |
|
data1[k] = buf[k].re; |
|
} |
|
idx->buf_idx = !idx->buf_idx; |
|
idx->overlap_idx = nsamples; |
|
} else { |
|
while (nsamples > s->nsamples_max * 2) { |
|
fast_convolute2(s, kernel_buf, conv_buf, idx, data0, data1, s->nsamples_max); |
|
data0 += s->nsamples_max; |
|
data1 += s->nsamples_max; |
|
nsamples -= s->nsamples_max; |
|
} |
|
fast_convolute2(s, kernel_buf, conv_buf, idx, data0, data1, nsamples/2); |
|
fast_convolute2(s, kernel_buf, conv_buf, idx, data0 + nsamples/2, data1 + nsamples/2, nsamples - nsamples/2); |
|
} |
|
} |
|
|
|
static void dump_fir(AVFilterContext *ctx, FILE *fp, int ch) |
|
{ |
|
FIREqualizerContext *s = ctx->priv; |
|
int rate = ctx->inputs[0]->sample_rate; |
|
int xlog = s->dumpscale == SCALE_LOGLIN || s->dumpscale == SCALE_LOGLOG; |
|
int ylog = s->dumpscale == SCALE_LINLOG || s->dumpscale == SCALE_LOGLOG; |
|
int x; |
|
int center = s->fir_len / 2; |
|
double delay = s->zero_phase ? 0.0 : (double) center / rate; |
|
double vx, ya, yb; |
|
|
|
if (!s->min_phase) { |
|
s->analysis_buf[0] *= s->rdft_len/2; |
|
for (x = 1; x <= center; x++) { |
|
s->analysis_buf[x] *= s->rdft_len/2; |
|
s->analysis_buf[s->analysis_rdft_len - x] *= s->rdft_len/2; |
|
} |
|
} else { |
|
for (x = 0; x < s->fir_len; x++) |
|
s->analysis_buf[x] *= s->rdft_len/2; |
|
} |
|
|
|
if (ch) |
|
fprintf(fp, "\n\n"); |
|
|
|
fprintf(fp, "# time[%d] (time amplitude)\n", ch); |
|
|
|
if (!s->min_phase) { |
|
for (x = center; x > 0; x--) |
|
fprintf(fp, "%15.10f %15.10f\n", delay - (double) x / rate, (double) s->analysis_buf[s->analysis_rdft_len - x]); |
|
|
|
for (x = 0; x <= center; x++) |
|
fprintf(fp, "%15.10f %15.10f\n", delay + (double)x / rate , (double) s->analysis_buf[x]); |
|
} else { |
|
for (x = 0; x < s->fir_len; x++) |
|
fprintf(fp, "%15.10f %15.10f\n", (double)x / rate, (double) s->analysis_buf[x]); |
|
} |
|
|
|
s->analysis_rdft_fn(s->analysis_rdft, s->analysis_tbuf, s->analysis_buf, sizeof(float)); |
|
|
|
fprintf(fp, "\n\n# freq[%d] (frequency desired_gain actual_gain)\n", ch); |
|
|
|
for (x = 0; x <= s->analysis_rdft_len/2; x++) { |
|
int i = 2 * x; |
|
vx = (double)x * rate / s->analysis_rdft_len; |
|
if (xlog) |
|
vx = log2(0.05*vx); |
|
ya = s->dump_buf[i]; |
|
yb = s->min_phase ? hypotf(s->analysis_tbuf[i], s->analysis_tbuf[i+1]) : s->analysis_tbuf[i]; |
|
if (s->min_phase) |
|
yb = fabs(yb); |
|
if (ylog) { |
|
ya = 20.0 * log10(fabs(ya)); |
|
yb = 20.0 * log10(fabs(yb)); |
|
} |
|
fprintf(fp, "%17.10f %17.10f %17.10f\n", vx, ya, yb); |
|
} |
|
} |
|
|
|
static double entry_func(void *p, double freq, double gain) |
|
{ |
|
AVFilterContext *ctx = p; |
|
FIREqualizerContext *s = ctx->priv; |
|
|
|
if (s->nb_gain_entry >= NB_GAIN_ENTRY_MAX) { |
|
av_log(ctx, AV_LOG_ERROR, "entry table overflow.\n"); |
|
s->gain_entry_err = AVERROR(EINVAL); |
|
return 0; |
|
} |
|
|
|
if (isnan(freq)) { |
|
av_log(ctx, AV_LOG_ERROR, "nan frequency (%g, %g).\n", freq, gain); |
|
s->gain_entry_err = AVERROR(EINVAL); |
|
return 0; |
|
} |
|
|
|
if (s->nb_gain_entry > 0 && freq <= s->gain_entry_tbl[s->nb_gain_entry - 1].freq) { |
|
av_log(ctx, AV_LOG_ERROR, "unsorted frequency (%g, %g).\n", freq, gain); |
|
s->gain_entry_err = AVERROR(EINVAL); |
|
return 0; |
|
} |
|
|
|
s->gain_entry_tbl[s->nb_gain_entry].freq = freq; |
|
s->gain_entry_tbl[s->nb_gain_entry].gain = gain; |
|
s->nb_gain_entry++; |
|
return 0; |
|
} |
|
|
|
static int gain_entry_compare(const void *key, const void *memb) |
|
{ |
|
const double *freq = key; |
|
const GainEntry *entry = memb; |
|
|
|
if (*freq < entry[0].freq) |
|
return -1; |
|
if (*freq > entry[1].freq) |
|
return 1; |
|
return 0; |
|
} |
|
|
|
static double gain_interpolate_func(void *p, double freq) |
|
{ |
|
AVFilterContext *ctx = p; |
|
FIREqualizerContext *s = ctx->priv; |
|
GainEntry *res; |
|
double d0, d1, d; |
|
|
|
if (isnan(freq)) |
|
return freq; |
|
|
|
if (!s->nb_gain_entry) |
|
return 0; |
|
|
|
if (freq <= s->gain_entry_tbl[0].freq) |
|
return s->gain_entry_tbl[0].gain; |
|
|
|
if (freq >= s->gain_entry_tbl[s->nb_gain_entry-1].freq) |
|
return s->gain_entry_tbl[s->nb_gain_entry-1].gain; |
|
|
|
res = bsearch(&freq, &s->gain_entry_tbl, s->nb_gain_entry - 1, sizeof(*res), gain_entry_compare); |
|
av_assert0(res); |
|
|
|
d = res[1].freq - res[0].freq; |
|
d0 = freq - res[0].freq; |
|
d1 = res[1].freq - freq; |
|
|
|
if (d0 && d1) |
|
return (d0 * res[1].gain + d1 * res[0].gain) / d; |
|
|
|
if (d0) |
|
return res[1].gain; |
|
|
|
return res[0].gain; |
|
} |
|
|
|
static double cubic_interpolate_func(void *p, double freq) |
|
{ |
|
AVFilterContext *ctx = p; |
|
FIREqualizerContext *s = ctx->priv; |
|
GainEntry *res; |
|
double x, x2, x3; |
|
double a, b, c, d; |
|
double m0, m1, m2, msum, unit; |
|
|
|
if (!s->nb_gain_entry) |
|
return 0; |
|
|
|
if (freq <= s->gain_entry_tbl[0].freq) |
|
return s->gain_entry_tbl[0].gain; |
|
|
|
if (freq >= s->gain_entry_tbl[s->nb_gain_entry-1].freq) |
|
return s->gain_entry_tbl[s->nb_gain_entry-1].gain; |
|
|
|
res = bsearch(&freq, &s->gain_entry_tbl, s->nb_gain_entry - 1, sizeof(*res), gain_entry_compare); |
|
av_assert0(res); |
|
|
|
unit = res[1].freq - res[0].freq; |
|
m0 = res != s->gain_entry_tbl ? |
|
unit * (res[0].gain - res[-1].gain) / (res[0].freq - res[-1].freq) : 0; |
|
m1 = res[1].gain - res[0].gain; |
|
m2 = res != s->gain_entry_tbl + s->nb_gain_entry - 2 ? |
|
unit * (res[2].gain - res[1].gain) / (res[2].freq - res[1].freq) : 0; |
|
|
|
msum = fabs(m0) + fabs(m1); |
|
m0 = msum > 0 ? (fabs(m0) * m1 + fabs(m1) * m0) / msum : 0; |
|
msum = fabs(m1) + fabs(m2); |
|
m1 = msum > 0 ? (fabs(m1) * m2 + fabs(m2) * m1) / msum : 0; |
|
|
|
d = res[0].gain; |
|
c = m0; |
|
b = 3 * res[1].gain - m1 - 2 * c - 3 * d; |
|
a = res[1].gain - b - c - d; |
|
|
|
x = (freq - res[0].freq) / unit; |
|
x2 = x * x; |
|
x3 = x2 * x; |
|
|
|
return a * x3 + b * x2 + c * x + d; |
|
} |
|
|
|
static const char *const var_names[] = { |
|
"f", |
|
"sr", |
|
"ch", |
|
"chid", |
|
"chs", |
|
"chlayout", |
|
NULL |
|
}; |
|
|
|
enum VarOffset { |
|
VAR_F, |
|
VAR_SR, |
|
VAR_CH, |
|
VAR_CHID, |
|
VAR_CHS, |
|
VAR_CHLAYOUT, |
|
VAR_NB |
|
}; |
|
|
|
static void generate_min_phase_kernel(FIREqualizerContext *s, float *rdft_buf) |
|
{ |
|
int k, cepstrum_len = s->cepstrum_len, rdft_len = s->rdft_len; |
|
double norm = 2.0 / cepstrum_len; |
|
double minval = 1e-7 / rdft_len; |
|
|
|
memset(s->cepstrum_buf, 0, cepstrum_len * sizeof(*s->cepstrum_buf)); |
|
memset(s->cepstrum_tbuf, 0, (cepstrum_len + 2) * sizeof(*s->cepstrum_tbuf)); |
|
memcpy(s->cepstrum_buf, rdft_buf, rdft_len/2 * sizeof(*rdft_buf)); |
|
memcpy(s->cepstrum_buf + cepstrum_len - rdft_len/2, rdft_buf + rdft_len/2, rdft_len/2 * sizeof(*rdft_buf)); |
|
|
|
s->cepstrum_rdft_fn(s->cepstrum_rdft, s->cepstrum_tbuf, s->cepstrum_buf, sizeof(float)); |
|
|
|
for (k = 0; k < cepstrum_len + 2; k += 2) { |
|
s->cepstrum_tbuf[k] = log(FFMAX(s->cepstrum_tbuf[k], minval)); |
|
s->cepstrum_tbuf[k+1] = 0; |
|
} |
|
|
|
s->cepstrum_irdft_fn(s->cepstrum_irdft, s->cepstrum_buf, s->cepstrum_tbuf, sizeof(AVComplexFloat)); |
|
|
|
memset(s->cepstrum_buf + cepstrum_len/2 + 1, 0, (cepstrum_len/2 - 1) * sizeof(*s->cepstrum_buf)); |
|
for (k = 1; k <= cepstrum_len/2; k++) |
|
s->cepstrum_buf[k] *= 2; |
|
|
|
s->cepstrum_rdft_fn(s->cepstrum_rdft, s->cepstrum_tbuf, s->cepstrum_buf, sizeof(float)); |
|
|
|
for (k = 0; k < cepstrum_len + 2; k += 2) { |
|
double mag = exp(s->cepstrum_tbuf[k] * norm) * norm; |
|
double ph = s->cepstrum_tbuf[k+1] * norm; |
|
s->cepstrum_tbuf[k] = mag * cos(ph); |
|
s->cepstrum_tbuf[k+1] = mag * sin(ph); |
|
} |
|
|
|
s->cepstrum_irdft_fn(s->cepstrum_irdft, s->cepstrum_buf, s->cepstrum_tbuf, sizeof(AVComplexFloat)); |
|
memset(rdft_buf, 0, s->rdft_len * sizeof(*rdft_buf)); |
|
memcpy(rdft_buf, s->cepstrum_buf, s->fir_len * sizeof(*rdft_buf)); |
|
|
|
if (s->dumpfile) { |
|
memset(s->analysis_buf, 0, (s->analysis_rdft_len + 2) * sizeof(*s->analysis_buf)); |
|
memcpy(s->analysis_buf, s->cepstrum_buf, s->fir_len * sizeof(*s->analysis_buf)); |
|
} |
|
} |
|
|
|
static int generate_kernel(AVFilterContext *ctx, const char *gain, const char *gain_entry) |
|
{ |
|
FIREqualizerContext *s = ctx->priv; |
|
AVFilterLink *inlink = ctx->inputs[0]; |
|
const char *gain_entry_func_names[] = { "entry", NULL }; |
|
const char *gain_func_names[] = { "gain_interpolate", "cubic_interpolate", NULL }; |
|
double (*gain_entry_funcs[])(void *, double, double) = { entry_func, NULL }; |
|
double (*gain_funcs[])(void *, double) = { gain_interpolate_func, cubic_interpolate_func, NULL }; |
|
double vars[VAR_NB]; |
|
AVExpr *gain_expr; |
|
int ret, k, center, ch; |
|
int xlog = s->scale == SCALE_LOGLIN || s->scale == SCALE_LOGLOG; |
|
int ylog = s->scale == SCALE_LINLOG || s->scale == SCALE_LOGLOG; |
|
FILE *dump_fp = NULL; |
|
|
|
s->nb_gain_entry = 0; |
|
s->gain_entry_err = 0; |
|
if (gain_entry) { |
|
double result = 0.0; |
|
ret = av_expr_parse_and_eval(&result, gain_entry, NULL, NULL, NULL, NULL, |
|
gain_entry_func_names, gain_entry_funcs, ctx, 0, ctx); |
|
if (ret < 0) |
|
return ret; |
|
if (s->gain_entry_err < 0) |
|
return s->gain_entry_err; |
|
} |
|
|
|
av_log(ctx, AV_LOG_DEBUG, "nb_gain_entry = %d.\n", s->nb_gain_entry); |
|
|
|
ret = av_expr_parse(&gain_expr, gain, var_names, |
|
gain_func_names, gain_funcs, NULL, NULL, 0, ctx); |
|
if (ret < 0) |
|
return ret; |
|
|
|
if (s->dumpfile && (!s->dump_buf || !s->analysis_rdft || !(dump_fp = avpriv_fopen_utf8(s->dumpfile, "w")))) |
|
av_log(ctx, AV_LOG_WARNING, "dumping failed.\n"); |
|
|
|
vars[VAR_CHS] = inlink->ch_layout.nb_channels; |
|
vars[VAR_CHLAYOUT] = inlink->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ? |
|
inlink->ch_layout.u.mask : 0; |
|
vars[VAR_SR] = inlink->sample_rate; |
|
for (ch = 0; ch < inlink->ch_layout.nb_channels; ch++) { |
|
float *rdft_buf = s->kernel_tmp_buf + ch * (s->rdft_len * 2); |
|
float *rdft_tbuf = s->kernel_tmp_tbuf; |
|
double result; |
|
vars[VAR_CH] = ch; |
|
vars[VAR_CHID] = av_channel_layout_channel_from_index(&inlink->ch_layout, ch); |
|
|
|
for (k = 0; k <= s->analysis_rdft_len/2; k++) { |
|
vars[VAR_F] = k * ((double)inlink->sample_rate /(double)s->analysis_rdft_len); |
|
if (xlog) |
|
vars[VAR_F] = log2(0.05 * vars[VAR_F]); |
|
result = av_expr_eval(gain_expr, vars, ctx); |
|
s->analysis_tbuf[2*k] = ylog ? pow(10.0, 0.05 * result) : s->min_phase ? fabs(result) : result; |
|
s->analysis_tbuf[2*k+1] = 0.0; |
|
} |
|
|
|
if (s->dump_buf) |
|
memcpy(s->dump_buf, s->analysis_tbuf, (s->analysis_rdft_len + 2) * sizeof(*s->analysis_tbuf)); |
|
|
|
s->analysis_irdft_fn(s->analysis_irdft, s->analysis_buf, s->analysis_tbuf, sizeof(AVComplexFloat)); |
|
center = s->fir_len / 2; |
|
|
|
for (k = 0; k <= center; k++) { |
|
double u = k * (M_PI/center); |
|
double win; |
|
switch (s->wfunc) { |
|
case WFUNC_RECTANGULAR: |
|
win = 1.0; |
|
break; |
|
case WFUNC_HANN: |
|
win = 0.5 + 0.5 * cos(u); |
|
break; |
|
case WFUNC_HAMMING: |
|
win = 0.53836 + 0.46164 * cos(u); |
|
break; |
|
case WFUNC_BLACKMAN: |
|
win = 0.42 + 0.5 * cos(u) + 0.08 * cos(2*u); |
|
break; |
|
case WFUNC_NUTTALL3: |
|
win = 0.40897 + 0.5 * cos(u) + 0.09103 * cos(2*u); |
|
break; |
|
case WFUNC_MNUTTALL3: |
|
win = 0.4243801 + 0.4973406 * cos(u) + 0.0782793 * cos(2*u); |
|
break; |
|
case WFUNC_NUTTALL: |
|
win = 0.355768 + 0.487396 * cos(u) + 0.144232 * cos(2*u) + 0.012604 * cos(3*u); |
|
break; |
|
case WFUNC_BNUTTALL: |
|
win = 0.3635819 + 0.4891775 * cos(u) + 0.1365995 * cos(2*u) + 0.0106411 * cos(3*u); |
|
break; |
|
case WFUNC_BHARRIS: |
|
win = 0.35875 + 0.48829 * cos(u) + 0.14128 * cos(2*u) + 0.01168 * cos(3*u); |
|
break; |
|
case WFUNC_TUKEY: |
|
win = (u <= 0.5 * M_PI) ? 1.0 : (0.5 + 0.5 * cos(2*u - M_PI)); |
|
break; |
|
default: |
|
av_assert0(0); |
|
} |
|
s->analysis_buf[k] *= (2.0/s->analysis_rdft_len) * (2.0/s->rdft_len) * win; |
|
if (k) |
|
s->analysis_buf[s->analysis_rdft_len - k] = s->analysis_buf[k]; |
|
} |
|
|
|
memset(s->analysis_buf + center + 1, 0, (s->analysis_rdft_len - s->fir_len) * sizeof(*s->analysis_buf)); |
|
memcpy(rdft_tbuf, s->analysis_buf, s->rdft_len/2 * sizeof(*s->analysis_buf)); |
|
memcpy(rdft_tbuf + s->rdft_len/2, s->analysis_buf + s->analysis_rdft_len - s->rdft_len/2, s->rdft_len/2 * sizeof(*s->analysis_buf)); |
|
if (s->min_phase) |
|
generate_min_phase_kernel(s, rdft_tbuf); |
|
s->rdft_fn(s->rdft, rdft_buf, rdft_tbuf, sizeof(float)); |
|
|
|
for (k = 0; k < s->rdft_len + 2; k++) { |
|
if (isnan(rdft_buf[k]) || isinf(rdft_buf[k])) { |
|
av_log(ctx, AV_LOG_ERROR, "filter kernel contains nan or infinity.\n"); |
|
av_expr_free(gain_expr); |
|
if (dump_fp) |
|
fclose(dump_fp); |
|
return AVERROR(EINVAL); |
|
} |
|
} |
|
|
|
if (!s->min_phase) { |
|
for (k = 0; k <= s->rdft_len/2; k++) |
|
rdft_buf[k] = rdft_buf[2*k]; |
|
} |
|
|
|
if (dump_fp) |
|
dump_fir(ctx, dump_fp, ch); |
|
|
|
if (!s->multi) |
|
break; |
|
} |
|
|
|
memcpy(s->kernel_buf, s->kernel_tmp_buf, (s->multi ? inlink->ch_layout.nb_channels : 1) * (s->rdft_len * 2) * sizeof(*s->kernel_buf)); |
|
av_expr_free(gain_expr); |
|
if (dump_fp) |
|
fclose(dump_fp); |
|
return 0; |
|
} |
|
|
|
#define SELECT_GAIN(s) (s->gain_cmd ? s->gain_cmd : s->gain) |
|
#define SELECT_GAIN_ENTRY(s) (s->gain_entry_cmd ? s->gain_entry_cmd : s->gain_entry) |
|
|
|
static int config_input(AVFilterLink *inlink) |
|
{ |
|
FilterLink *l = ff_filter_link(inlink); |
|
AVFilterContext *ctx = inlink->dst; |
|
FIREqualizerContext *s = ctx->priv; |
|
float iscale, scale = 1.f; |
|
int rdft_bits, ret; |
|
|
|
common_uninit(s); |
|
|
|
s->next_pts = 0; |
|
s->frame_nsamples_max = 0; |
|
|
|
s->fir_len = FFMAX(2 * (int)(inlink->sample_rate * s->delay) + 1, 3); |
|
s->remaining = s->fir_len - 1; |
|
|
|
for (rdft_bits = RDFT_BITS_MIN; rdft_bits <= RDFT_BITS_MAX; rdft_bits++) { |
|
s->rdft_len = 1 << rdft_bits; |
|
s->nsamples_max = s->rdft_len - s->fir_len + 1; |
|
if (s->nsamples_max * 2 >= s->fir_len) |
|
break; |
|
} |
|
|
|
if (rdft_bits > RDFT_BITS_MAX) { |
|
av_log(ctx, AV_LOG_ERROR, "too large delay, please decrease it.\n"); |
|
return AVERROR(EINVAL); |
|
} |
|
|
|
iscale = 0.5f; |
|
if (((ret = av_tx_init(&s->rdft, &s->rdft_fn, AV_TX_FLOAT_RDFT, 0, 1 << rdft_bits, &scale, 0)) < 0) || |
|
((ret = av_tx_init(&s->irdft, &s->irdft_fn, AV_TX_FLOAT_RDFT, 1, 1 << rdft_bits, &iscale, 0)) < 0)) |
|
return ret; |
|
|
|
scale = 1.f; |
|
if (s->fft2 && !s->multi && inlink->ch_layout.nb_channels > 1 && |
|
((ret = av_tx_init(&s->fft_ctx, &s->fft_fn, AV_TX_FLOAT_FFT, 0, 1 << rdft_bits, &scale, 0)) < 0)) |
|
return ret; |
|
|
|
if (s->min_phase) { |
|
int cepstrum_bits = rdft_bits + 2; |
|
if (cepstrum_bits > RDFT_BITS_MAX) { |
|
av_log(ctx, AV_LOG_ERROR, "too large delay, please decrease it.\n"); |
|
return AVERROR(EINVAL); |
|
} |
|
|
|
cepstrum_bits = FFMIN(RDFT_BITS_MAX, cepstrum_bits + 1); |
|
scale = 1.f; |
|
ret = av_tx_init(&s->cepstrum_rdft, &s->cepstrum_rdft_fn, AV_TX_FLOAT_RDFT, 0, 1 << cepstrum_bits, &scale, 0); |
|
if (ret < 0) |
|
return ret; |
|
|
|
iscale = 0.5f; |
|
ret = av_tx_init(&s->cepstrum_irdft, &s->cepstrum_irdft_fn, AV_TX_FLOAT_RDFT, 1, 1 << cepstrum_bits, &iscale, 0); |
|
if (ret < 0) |
|
return ret; |
|
|
|
s->cepstrum_len = 1 << cepstrum_bits; |
|
s->cepstrum_buf = av_malloc_array(s->cepstrum_len, sizeof(*s->cepstrum_buf)); |
|
if (!s->cepstrum_buf) |
|
return AVERROR(ENOMEM); |
|
s->cepstrum_tbuf = av_malloc_array(s->cepstrum_len + 2, sizeof(*s->cepstrum_tbuf)); |
|
if (!s->cepstrum_tbuf) |
|
return AVERROR(ENOMEM); |
|
} |
|
|
|
for ( ; rdft_bits <= RDFT_BITS_MAX; rdft_bits++) { |
|
s->analysis_rdft_len = 1 << rdft_bits; |
|
if (inlink->sample_rate <= s->accuracy * s->analysis_rdft_len) |
|
break; |
|
} |
|
|
|
if (rdft_bits > RDFT_BITS_MAX) { |
|
av_log(ctx, AV_LOG_ERROR, "too small accuracy, please increase it.\n"); |
|
return AVERROR(EINVAL); |
|
} |
|
|
|
iscale = 0.5f; |
|
if ((ret = av_tx_init(&s->analysis_irdft, &s->analysis_irdft_fn, AV_TX_FLOAT_RDFT, 1, 1 << rdft_bits, &iscale, 0)) < 0) |
|
return ret; |
|
|
|
if (s->dumpfile) { |
|
scale = 1.f; |
|
if ((ret = av_tx_init(&s->analysis_rdft, &s->analysis_rdft_fn, AV_TX_FLOAT_RDFT, 0, 1 << rdft_bits, &scale, 0)) < 0) |
|
return ret; |
|
s->dump_buf = av_malloc_array(s->analysis_rdft_len + 2, sizeof(*s->dump_buf)); |
|
} |
|
|
|
s->analysis_buf = av_malloc_array((s->analysis_rdft_len + 2), sizeof(*s->analysis_buf)); |
|
s->analysis_tbuf = av_malloc_array(s->analysis_rdft_len + 2, sizeof(*s->analysis_tbuf)); |
|
s->kernel_tmp_buf = av_malloc_array((s->rdft_len * 2) * (s->multi ? inlink->ch_layout.nb_channels : 1), sizeof(*s->kernel_tmp_buf)); |
|
s->kernel_tmp_tbuf = av_malloc_array(s->rdft_len, sizeof(*s->kernel_tmp_tbuf)); |
|
s->kernel_buf = av_malloc_array((s->rdft_len * 2) * (s->multi ? inlink->ch_layout.nb_channels : 1), sizeof(*s->kernel_buf)); |
|
s->tx_buf = av_malloc_array(2 * (s->rdft_len + 2), sizeof(*s->kernel_buf)); |
|
s->conv_buf = av_calloc(2 * s->rdft_len * inlink->ch_layout.nb_channels, sizeof(*s->conv_buf)); |
|
s->conv_idx = av_calloc(inlink->ch_layout.nb_channels, sizeof(*s->conv_idx)); |
|
if (!s->analysis_buf || !s->analysis_tbuf || !s->kernel_tmp_buf || !s->kernel_buf || !s->conv_buf || !s->conv_idx || !s->kernel_tmp_tbuf || !s->tx_buf) |
|
return AVERROR(ENOMEM); |
|
|
|
av_log(ctx, AV_LOG_DEBUG, "sample_rate = %d, channels = %d, analysis_rdft_len = %d, rdft_len = %d, fir_len = %d, nsamples_max = %d.\n", |
|
inlink->sample_rate, inlink->ch_layout.nb_channels, s->analysis_rdft_len, s->rdft_len, s->fir_len, s->nsamples_max); |
|
|
|
if (s->fixed) |
|
l->min_samples = l->max_samples = s->nsamples_max; |
|
|
|
return generate_kernel(ctx, SELECT_GAIN(s), SELECT_GAIN_ENTRY(s)); |
|
} |
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *frame) |
|
{ |
|
AVFilterContext *ctx = inlink->dst; |
|
FIREqualizerContext *s = ctx->priv; |
|
int ch; |
|
|
|
if (!s->min_phase) { |
|
for (ch = 0; ch + 1 < inlink->ch_layout.nb_channels && s->fft_ctx; ch += 2) { |
|
fast_convolute2(s, s->kernel_buf, (AVComplexFloat *)(s->conv_buf + 2 * ch * s->rdft_len), |
|
s->conv_idx + ch, (float *) frame->extended_data[ch], |
|
(float *) frame->extended_data[ch+1], frame->nb_samples); |
|
} |
|
|
|
for ( ; ch < inlink->ch_layout.nb_channels; ch++) { |
|
fast_convolute(s, s->kernel_buf + (s->multi ? ch * (s->rdft_len * 2) : 0), |
|
s->conv_buf + 2 * ch * s->rdft_len, s->conv_idx + ch, |
|
(float *) frame->extended_data[ch], frame->nb_samples); |
|
} |
|
} else { |
|
for (ch = 0; ch < inlink->ch_layout.nb_channels; ch++) { |
|
fast_convolute_nonlinear(s, s->kernel_buf + (s->multi ? ch * (s->rdft_len * 2) : 0), |
|
s->conv_buf + 2 * ch * s->rdft_len, s->conv_idx + ch, |
|
(float *) frame->extended_data[ch], frame->nb_samples); |
|
} |
|
} |
|
|
|
s->next_pts = AV_NOPTS_VALUE; |
|
if (frame->pts != AV_NOPTS_VALUE) { |
|
s->next_pts = frame->pts + av_rescale_q(frame->nb_samples, av_make_q(1, inlink->sample_rate), inlink->time_base); |
|
if (s->zero_phase && !s->min_phase) |
|
frame->pts -= av_rescale_q(s->fir_len/2, av_make_q(1, inlink->sample_rate), inlink->time_base); |
|
} |
|
s->frame_nsamples_max = FFMAX(s->frame_nsamples_max, frame->nb_samples); |
|
return ff_filter_frame(ctx->outputs[0], frame); |
|
} |
|
|
|
static int request_frame(AVFilterLink *outlink) |
|
{ |
|
AVFilterContext *ctx = outlink->src; |
|
FIREqualizerContext *s= ctx->priv; |
|
int ret; |
|
|
|
ret = ff_request_frame(ctx->inputs[0]); |
|
if (ret == AVERROR_EOF && s->remaining > 0 && s->frame_nsamples_max > 0) { |
|
AVFrame *frame = ff_get_audio_buffer(outlink, FFMIN(s->remaining, s->frame_nsamples_max)); |
|
|
|
if (!frame) |
|
return AVERROR(ENOMEM); |
|
|
|
av_samples_set_silence(frame->extended_data, 0, frame->nb_samples, outlink->ch_layout.nb_channels, frame->format); |
|
frame->pts = s->next_pts; |
|
s->remaining -= frame->nb_samples; |
|
ret = filter_frame(ctx->inputs[0], frame); |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, |
|
char *res, int res_len, int flags) |
|
{ |
|
FIREqualizerContext *s = ctx->priv; |
|
int ret = AVERROR(ENOSYS); |
|
|
|
if (!strcmp(cmd, "gain")) { |
|
char *gain_cmd; |
|
|
|
if (SELECT_GAIN(s) && !strcmp(SELECT_GAIN(s), args)) { |
|
av_log(ctx, AV_LOG_DEBUG, "equal gain, do not rebuild.\n"); |
|
return 0; |
|
} |
|
|
|
gain_cmd = av_strdup(args); |
|
if (!gain_cmd) |
|
return AVERROR(ENOMEM); |
|
|
|
ret = generate_kernel(ctx, gain_cmd, SELECT_GAIN_ENTRY(s)); |
|
if (ret >= 0) { |
|
av_freep(&s->gain_cmd); |
|
s->gain_cmd = gain_cmd; |
|
} else { |
|
av_freep(&gain_cmd); |
|
} |
|
} else if (!strcmp(cmd, "gain_entry")) { |
|
char *gain_entry_cmd; |
|
|
|
if (SELECT_GAIN_ENTRY(s) && !strcmp(SELECT_GAIN_ENTRY(s), args)) { |
|
av_log(ctx, AV_LOG_DEBUG, "equal gain_entry, do not rebuild.\n"); |
|
return 0; |
|
} |
|
|
|
gain_entry_cmd = av_strdup(args); |
|
if (!gain_entry_cmd) |
|
return AVERROR(ENOMEM); |
|
|
|
ret = generate_kernel(ctx, SELECT_GAIN(s), gain_entry_cmd); |
|
if (ret >= 0) { |
|
av_freep(&s->gain_entry_cmd); |
|
s->gain_entry_cmd = gain_entry_cmd; |
|
} else { |
|
av_freep(&gain_entry_cmd); |
|
} |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static const AVFilterPad firequalizer_inputs[] = { |
|
{ |
|
.name = "default", |
|
.flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE, |
|
.config_props = config_input, |
|
.filter_frame = filter_frame, |
|
.type = AVMEDIA_TYPE_AUDIO, |
|
}, |
|
}; |
|
|
|
static const AVFilterPad firequalizer_outputs[] = { |
|
{ |
|
.name = "default", |
|
.request_frame = request_frame, |
|
.type = AVMEDIA_TYPE_AUDIO, |
|
}, |
|
}; |
|
|
|
const AVFilter ff_af_firequalizer = { |
|
.name = "firequalizer", |
|
.description = NULL_IF_CONFIG_SMALL("Finite Impulse Response Equalizer."), |
|
.uninit = uninit, |
|
.process_command = process_command, |
|
.priv_size = sizeof(FIREqualizerContext), |
|
FILTER_INPUTS(firequalizer_inputs), |
|
FILTER_OUTPUTS(firequalizer_outputs), |
|
FILTER_SINGLE_SAMPLEFMT(AV_SAMPLE_FMT_FLTP), |
|
.priv_class = &firequalizer_class, |
|
};
|
|
|