} Pair;
typedef struct BiquadContext {
- double a0, a1, a2;
- double b0, b1, b2;
+ double a[3];
+ double b[3];
double i1, i2;
double o1, o2;
} BiquadContext;
char *a_str, *b_str, *g_str;
double dry_gain, wet_gain;
double mix;
+ int normalize;
int format;
int process;
int precision;
AVFilterLink *videolink = ctx->outputs[1];
formats = ff_make_format_list(pix_fmts);
- if ((ret = ff_formats_ref(formats, &videolink->in_formats)) < 0)
+ if ((ret = ff_formats_ref(formats, &videolink->incfg.formats)) < 0)
return ret;
}
ThreadData *td = arg; \
AVFrame *in = td->in, *out = td->out; \
const type *src = (const type *)in->extended_data[ch]; \
- double *ic = (double *)s->iir[ch].cache[0]; \
- double *oc = (double *)s->iir[ch].cache[1]; \
+ double *oc = (double *)s->iir[ch].cache[0]; \
+ double *ic = (double *)s->iir[ch].cache[1]; \
const int nb_a = s->iir[ch].nb_ab[0]; \
const int nb_b = s->iir[ch].nb_ab[1]; \
const double *a = s->iir[ch].ab[0]; \
int n, i; \
\
for (i = 0; i < nb_biquads; i++) { \
- const double a1 = -iir->biquads[i].a1; \
- const double a2 = -iir->biquads[i].a2; \
- const double b0 = iir->biquads[i].b0; \
- const double b1 = iir->biquads[i].b1; \
- const double b2 = iir->biquads[i].b2; \
+ const double a1 = -iir->biquads[i].a[1]; \
+ const double a2 = -iir->biquads[i].a[2]; \
+ const double b0 = iir->biquads[i].b[0]; \
+ const double b1 = iir->biquads[i].b[1]; \
+ const double b2 = iir->biquads[i].b[2]; \
double i1 = iir->biquads[i].i1; \
double i2 = iir->biquads[i].i2; \
double o1 = iir->biquads[i].o1; \
return 0;
}
-static const char *format[] = { "%lf", "%lf %lfi", "%lf %lfr", "%lf %lfd" };
+static const char *format[] = { "%lf", "%lf %lfi", "%lf %lfr", "%lf %lfd", "%lf %lfi" };
static int read_channels(AVFilterContext *ctx, int channels, uint8_t *item_str, int ab)
{
return 0;
}
-static void multiply(double wre, double wim, int npz, double *coeffs)
+static void cmul(double re, double im, double re2, double im2, double *RE, double *IM)
{
- double nwre = -wre, nwim = -wim;
- double cre, cim;
- int i;
+ *RE = re * re2 - im * im2;
+ *IM = re * im2 + re2 * im;
+}
+
+static int expand(AVFilterContext *ctx, double *pz, int n, double *coefs)
+{
+ coefs[2 * n] = 1.0;
- for (i = npz; i >= 1; i--) {
- cre = coeffs[2 * i + 0];
- cim = coeffs[2 * i + 1];
+ for (int i = 1; i <= n; i++) {
+ for (int j = n - i; j < n; j++) {
+ double re, im;
- coeffs[2 * i + 0] = (nwre * cre - nwim * cim) + coeffs[2 * (i - 1) + 0];
- coeffs[2 * i + 1] = (nwre * cim + nwim * cre) + coeffs[2 * (i - 1) + 1];
+ cmul(coefs[2 * (j + 1)], coefs[2 * (j + 1) + 1],
+ pz[2 * (i - 1)], pz[2 * (i - 1) + 1], &re, &im);
+
+ coefs[2 * j] -= re;
+ coefs[2 * j + 1] -= im;
+ }
}
- cre = coeffs[0];
- cim = coeffs[1];
- coeffs[0] = nwre * cre - nwim * cim;
- coeffs[1] = nwre * cim + nwim * cre;
+ for (int i = 0; i < n + 1; i++) {
+ if (fabs(coefs[2 * i + 1]) > FLT_EPSILON) {
+ av_log(ctx, AV_LOG_ERROR, "coefs: %f of z^%d is not real; poles/zeros are not complex conjugates.\n",
+ coefs[2 * i + 1], i);
+ return AVERROR(EINVAL);
+ }
+ }
+
+ return 0;
}
-static int expand(AVFilterContext *ctx, double *pz, int nb, double *coeffs)
+static void normalize_coeffs(AVFilterContext *ctx, int ch)
{
- int i;
+ AudioIIRContext *s = ctx->priv;
+ IIRChannel *iir = &s->iir[ch];
+ double sum_den = 0.;
- coeffs[0] = 1.0;
- coeffs[1] = 0.0;
+ if (!s->normalize)
+ return;
- for (i = 0; i < nb; i++) {
- coeffs[2 * (i + 1) ] = 0.0;
- coeffs[2 * (i + 1) + 1] = 0.0;
+ for (int i = 0; i < iir->nb_ab[1]; i++) {
+ sum_den += iir->ab[1][i];
}
- for (i = 0; i < nb; i++)
- multiply(pz[2 * i], pz[2 * i + 1], nb, coeffs);
+ if (sum_den > 1e-6) {
+ double factor, sum_num = 0.;
- for (i = 0; i < nb + 1; i++) {
- if (fabs(coeffs[2 * i + 1]) > FLT_EPSILON) {
- av_log(ctx, AV_LOG_ERROR, "coeff: %f of z^%d is not real; poles/zeros are not complex conjugates.\n",
- coeffs[2 * i + 1], i);
- return AVERROR(EINVAL);
+ for (int i = 0; i < iir->nb_ab[0]; i++) {
+ sum_num += iir->ab[0][i];
}
- }
- return 0;
+ factor = sum_num / sum_den;
+
+ for (int i = 0; i < iir->nb_ab[1]; i++) {
+ iir->ab[1][i] *= factor;
+ }
+ }
}
static int convert_zp2tf(AVFilterContext *ctx, int channels)
IIRChannel *iir = &s->iir[ch];
double *topc, *botc;
- topc = av_calloc((iir->nb_ab[0] + 1) * 2, sizeof(*topc));
- botc = av_calloc((iir->nb_ab[1] + 1) * 2, sizeof(*botc));
+ topc = av_calloc((iir->nb_ab[1] + 1) * 2, sizeof(*topc));
+ botc = av_calloc((iir->nb_ab[0] + 1) * 2, sizeof(*botc));
if (!topc || !botc) {
ret = AVERROR(ENOMEM);
goto fail;
}
iir->nb_ab[0]++;
+ normalize_coeffs(ctx, ch);
+
fail:
av_free(topc);
av_free(botc);
double a[6] = { 0 };
double min_distance = DBL_MAX;
double max_mag = 0;
+ double factor;
int i;
for (i = 0; i < iir->nb_ab[0]; i++) {
}
}
- for (i = 0; i < iir->nb_ab[1]; i++) {
+ for (i = 0; i < iir->nb_ab[0]; i++) {
if (isnan(iir->ab[0][2 * i]) || isnan(iir->ab[0][2 * i + 1]))
continue;
iir->ab[1][2 * nearest_zero.a] = iir->ab[1][2 * nearest_zero.a + 1] = NAN;
iir->ab[1][2 * nearest_zero.b] = iir->ab[1][2 * nearest_zero.b + 1] = NAN;
- iir->biquads[current_biquad].a0 = 1.0;
- iir->biquads[current_biquad].a1 = a[2] / a[4];
- iir->biquads[current_biquad].a2 = a[0] / a[4];
- iir->biquads[current_biquad].b0 = b[4] / a[4] * (current_biquad ? 1.0 : iir->g);
- iir->biquads[current_biquad].b1 = b[2] / a[4] * (current_biquad ? 1.0 : iir->g);
- iir->biquads[current_biquad].b2 = b[0] / a[4] * (current_biquad ? 1.0 : iir->g);
+ iir->biquads[current_biquad].a[0] = 1.;
+ iir->biquads[current_biquad].a[1] = a[2] / a[4];
+ iir->biquads[current_biquad].a[2] = a[0] / a[4];
+ iir->biquads[current_biquad].b[0] = b[4] / a[4];
+ iir->biquads[current_biquad].b[1] = b[2] / a[4];
+ iir->biquads[current_biquad].b[2] = b[0] / a[4];
+
+ if (s->normalize &&
+ fabs(iir->biquads[current_biquad].b[0] +
+ iir->biquads[current_biquad].b[1] +
+ iir->biquads[current_biquad].b[2]) > 1e-6) {
+ factor = (iir->biquads[current_biquad].a[0] +
+ iir->biquads[current_biquad].a[1] +
+ iir->biquads[current_biquad].a[2]) /
+ (iir->biquads[current_biquad].b[0] +
+ iir->biquads[current_biquad].b[1] +
+ iir->biquads[current_biquad].b[2]);
+
+ av_log(ctx, AV_LOG_VERBOSE, "factor=%f\n", factor);
+
+ iir->biquads[current_biquad].b[0] *= factor;
+ iir->biquads[current_biquad].b[1] *= factor;
+ iir->biquads[current_biquad].b[2] *= factor;
+ }
+
+ iir->biquads[current_biquad].b[0] *= (current_biquad ? 1.0 : iir->g);
+ iir->biquads[current_biquad].b[1] *= (current_biquad ? 1.0 : iir->g);
+ iir->biquads[current_biquad].b[2] *= (current_biquad ? 1.0 : iir->g);
av_log(ctx, AV_LOG_VERBOSE, "a=%f %f %f:b=%f %f %f\n",
- iir->biquads[current_biquad].a0,
- iir->biquads[current_biquad].a1,
- iir->biquads[current_biquad].a2,
- iir->biquads[current_biquad].b0,
- iir->biquads[current_biquad].b1,
- iir->biquads[current_biquad].b2);
+ iir->biquads[current_biquad].a[0],
+ iir->biquads[current_biquad].a[1],
+ iir->biquads[current_biquad].a[2],
+ iir->biquads[current_biquad].b[0],
+ iir->biquads[current_biquad].b[1],
+ iir->biquads[current_biquad].b[2]);
current_biquad++;
}
}
}
+static void convert_sp2zp(AVFilterContext *ctx, int channels)
+{
+ AudioIIRContext *s = ctx->priv;
+ int ch;
+
+ for (ch = 0; ch < channels; ch++) {
+ IIRChannel *iir = &s->iir[ch];
+ int n;
+
+ for (n = 0; n < iir->nb_ab[0]; n++) {
+ double sr = iir->ab[0][2*n];
+ double si = iir->ab[0][2*n+1];
+ double snr = 1. + sr;
+ double sdr = 1. - sr;
+ double div = sdr * sdr + si * si;
+
+ iir->ab[0][2*n] = (snr * sdr - si * si) / div;
+ iir->ab[0][2*n+1] = (sdr * si + snr * si) / div;
+ }
+
+ for (n = 0; n < iir->nb_ab[1]; n++) {
+ double sr = iir->ab[1][2*n];
+ double si = iir->ab[1][2*n+1];
+ double snr = 1. + sr;
+ double sdr = 1. - sr;
+ double div = sdr * sdr + si * si;
+
+ iir->ab[1][2*n] = (snr * sdr - si * si) / div;
+ iir->ab[1][2*n+1] = (sdr * si + snr * si) / div;
+ }
+ }
+}
+
static void convert_pd2zp(AVFilterContext *ctx, int channels)
{
AudioIIRContext *s = ctx->priv;
}
}
+static void check_stability(AVFilterContext *ctx, int channels)
+{
+ AudioIIRContext *s = ctx->priv;
+ int ch;
+
+ for (ch = 0; ch < channels; ch++) {
+ IIRChannel *iir = &s->iir[ch];
+
+ for (int n = 0; n < iir->nb_ab[0]; n++) {
+ double pr = hypot(iir->ab[0][2*n], iir->ab[0][2*n+1]);
+
+ if (pr >= 1.) {
+ av_log(ctx, AV_LOG_WARNING, "pole %d at channel %d is unstable\n", n, ch);
+ break;
+ }
+ }
+ }
+}
+
static void drawtext(AVFrame *pic, int x, int y, const char *txt, uint32_t color)
{
const uint8_t *font;
}
}
-static void draw_response(AVFilterContext *ctx, AVFrame *out)
+static double distance(double x0, double x1, double y0, double y1)
+{
+ return hypot(x0 - x1, y0 - y1);
+}
+
+static void get_response(int channel, int format, double w,
+ const double *b, const double *a,
+ int nb_b, int nb_a, double *magnitude, double *phase)
+{
+ double realz, realp;
+ double imagz, imagp;
+ double real, imag;
+ double div;
+
+ if (format == 0) {
+ realz = 0., realp = 0.;
+ imagz = 0., imagp = 0.;
+ for (int x = 0; x < nb_a; x++) {
+ realz += cos(-x * w) * a[x];
+ imagz += sin(-x * w) * a[x];
+ }
+
+ for (int x = 0; x < nb_b; x++) {
+ realp += cos(-x * w) * b[x];
+ imagp += sin(-x * w) * b[x];
+ }
+
+ div = realp * realp + imagp * imagp;
+ real = (realz * realp + imagz * imagp) / div;
+ imag = (imagz * realp - imagp * realz) / div;
+
+ *magnitude = hypot(real, imag);
+ *phase = atan2(imag, real);
+ } else {
+ double p = 1., z = 1.;
+ double acc = 0.;
+
+ for (int x = 0; x < nb_a; x++) {
+ z *= distance(cos(w), a[2 * x], sin(w), a[2 * x + 1]);
+ acc += atan2(sin(w) - a[2 * x + 1], cos(w) - a[2 * x]);
+ }
+
+ for (int x = 0; x < nb_b; x++) {
+ p *= distance(cos(w), b[2 * x], sin(w), b[2 * x + 1]);
+ acc -= atan2(sin(w) - b[2 * x + 1], cos(w) - b[2 * x]);
+ }
+
+ *magnitude = z / p;
+ *phase = acc;
+ }
+}
+
+static void draw_response(AVFilterContext *ctx, AVFrame *out, int sample_rate)
{
AudioIIRContext *s = ctx->priv;
- float *mag, *phase, min = FLT_MAX, max = FLT_MIN;
- int prev_ymag = -1, prev_yphase = -1;
+ double *mag, *phase, *temp, *delay, min = DBL_MAX, max = -DBL_MAX;
+ double min_delay = DBL_MAX, max_delay = -DBL_MAX, min_phase, max_phase;
+ int prev_ymag = -1, prev_yphase = -1, prev_ydelay = -1;
char text[32];
- int ch, i, x;
+ int ch, i;
memset(out->data[0], 0, s->h * out->linesize[0]);
phase = av_malloc_array(s->w, sizeof(*phase));
+ temp = av_malloc_array(s->w, sizeof(*temp));
mag = av_malloc_array(s->w, sizeof(*mag));
- if (!mag || !phase)
+ delay = av_malloc_array(s->w, sizeof(*delay));
+ if (!mag || !phase || !delay || !temp)
goto end;
ch = av_clip(s->ir_channel, 0, s->channels - 1);
for (i = 0; i < s->w; i++) {
const double *b = s->iir[ch].ab[0];
const double *a = s->iir[ch].ab[1];
+ const int nb_b = s->iir[ch].nb_ab[0];
+ const int nb_a = s->iir[ch].nb_ab[1];
double w = i * M_PI / (s->w - 1);
- double realz, realp;
- double imagz, imagp;
- double real, imag, div;
-
- if (s->format == 0) {
- realz = 0., realp = 0.;
- imagz = 0., imagp = 0.;
- for (x = 0; x < s->iir[ch].nb_ab[1]; x++) {
- realz += cos(-x * w) * a[x];
- imagz += sin(-x * w) * a[x];
- }
-
- for (x = 0; x < s->iir[ch].nb_ab[0]; x++) {
- realp += cos(-x * w) * b[x];
- imagp += sin(-x * w) * b[x];
- }
-
- div = realp * realp + imagp * imagp;
- real = (realz * realp + imagz * imagp) / div;
- imag = (imagz * realp - imagp * realz) / div;
- } else {
- real = 1;
- imag = 0;
- for (x = 0; x < s->iir[ch].nb_ab[1]; x++) {
- double ore, oim, re, im;
-
- re = cos(w) - a[2 * x];
- im = sin(w) - a[2 * x + 1];
+ double m, p;
- ore = real;
- oim = imag;
+ get_response(ch, s->format, w, b, a, nb_b, nb_a, &m, &p);
- real = ore * re - oim * im;
- imag = ore * im + oim * re;
- }
-
- for (x = 0; x < s->iir[ch].nb_ab[0]; x++) {
- double ore, oim, re, im;
+ mag[i] = s->iir[ch].g * m;
+ phase[i] = p;
+ min = fmin(min, mag[i]);
+ max = fmax(max, mag[i]);
+ }
- re = cos(w) - b[2 * x];
- im = sin(w) - b[2 * x + 1];
+ temp[0] = 0.;
+ for (i = 0; i < s->w - 1; i++) {
+ double d = phase[i] - phase[i + 1];
+ temp[i + 1] = ceil(fabs(d) / (2. * M_PI)) * 2. * M_PI * ((d > M_PI) - (d < -M_PI));
+ }
- ore = real;
- oim = imag;
- div = re * re + im * im;
+ min_phase = phase[0];
+ max_phase = phase[0];
+ for (i = 1; i < s->w; i++) {
+ temp[i] += temp[i - 1];
+ phase[i] += temp[i];
+ min_phase = fmin(min_phase, phase[i]);
+ max_phase = fmax(max_phase, phase[i]);
+ }
- real = (ore * re + oim * im) / div;
- imag = (oim * re - ore * im) / div;
- }
- }
+ for (i = 0; i < s->w - 1; i++) {
+ double div = s->w / (double)sample_rate;
- mag[i] = s->iir[ch].g * hypot(real, imag);
- phase[i] = atan2(imag, real);
- min = fminf(min, mag[i]);
- max = fmaxf(max, mag[i]);
+ delay[i + 1] = -(phase[i] - phase[i + 1]) / div;
+ min_delay = fmin(min_delay, delay[i + 1]);
+ max_delay = fmax(max_delay, delay[i + 1]);
}
+ delay[0] = delay[1];
for (i = 0; i < s->w; i++) {
int ymag = mag[i] / max * (s->h - 1);
- int yphase = (0.5 * (1. + phase[i] / M_PI)) * (s->h - 1);
+ int ydelay = (delay[i] - min_delay) / (max_delay - min_delay) * (s->h - 1);
+ int yphase = (phase[i] - min_phase) / (max_phase - min_phase) * (s->h - 1);
ymag = s->h - 1 - av_clip(ymag, 0, s->h - 1);
yphase = s->h - 1 - av_clip(yphase, 0, s->h - 1);
+ ydelay = s->h - 1 - av_clip(ydelay, 0, s->h - 1);
if (prev_ymag < 0)
prev_ymag = ymag;
if (prev_yphase < 0)
prev_yphase = yphase;
+ if (prev_ydelay < 0)
+ prev_ydelay = ydelay;
draw_line(out, i, ymag, FFMAX(i - 1, 0), prev_ymag, 0xFFFF00FF);
draw_line(out, i, yphase, FFMAX(i - 1, 0), prev_yphase, 0xFF00FF00);
+ draw_line(out, i, ydelay, FFMAX(i - 1, 0), prev_ydelay, 0xFF00FFFF);
prev_ymag = ymag;
prev_yphase = yphase;
+ prev_ydelay = ydelay;
}
if (s->w > 400 && s->h > 100) {
drawtext(out, 2, 12, "Min Magnitude:", 0xDDDDDDDD);
snprintf(text, sizeof(text), "%.2f", min);
drawtext(out, 15 * 8 + 2, 12, text, 0xDDDDDDDD);
+
+ drawtext(out, 2, 22, "Max Phase:", 0xDDDDDDDD);
+ snprintf(text, sizeof(text), "%.2f", max_phase);
+ drawtext(out, 15 * 8 + 2, 22, text, 0xDDDDDDDD);
+
+ drawtext(out, 2, 32, "Min Phase:", 0xDDDDDDDD);
+ snprintf(text, sizeof(text), "%.2f", min_phase);
+ drawtext(out, 15 * 8 + 2, 32, text, 0xDDDDDDDD);
+
+ drawtext(out, 2, 42, "Max Delay:", 0xDDDDDDDD);
+ snprintf(text, sizeof(text), "%.2f", max_delay);
+ drawtext(out, 11 * 8 + 2, 42, text, 0xDDDDDDDD);
+
+ drawtext(out, 2, 52, "Min Delay:", 0xDDDDDDDD);
+ snprintf(text, sizeof(text), "%.2f", min_delay);
+ drawtext(out, 11 * 8 + 2, 52, text, 0xDDDDDDDD);
}
end:
+ av_free(delay);
+ av_free(temp);
av_free(phase);
av_free(mag);
}
convert_pr2zp(ctx, inlink->channels);
} else if (s->format == 3) {
convert_pd2zp(ctx, inlink->channels);
+ } else if (s->format == 4) {
+ convert_sp2zp(ctx, inlink->channels);
+ }
+ if (s->format > 0) {
+ check_stability(ctx, inlink->channels);
}
av_frame_free(&s->video);
if (!s->video)
return AVERROR(ENOMEM);
- draw_response(ctx, s->video);
+ draw_response(ctx, s->video, inlink->sample_rate);
}
if (s->format == 0)
iir->ab[0][i] /= iir->ab[0][0];
}
+ iir->ab[0][0] = 1.0;
for (i = 0; i < iir->nb_ab[1]; i++) {
- iir->ab[1][i] *= iir->g / iir->ab[0][0];
+ iir->ab[1][i] *= iir->g;
}
+
+ normalize_coeffs(ctx, ch);
}
switch (inlink->format) {
int64_t new_pts = av_rescale_q(out->pts, ctx->inputs[0]->time_base, outlink->time_base);
if (new_pts > old_pts) {
+ AVFrame *clone;
+
s->video->pts = new_pts;
- ret = ff_filter_frame(outlink, av_frame_clone(s->video));
+ clone = av_frame_clone(s->video);
+ if (!clone)
+ return AVERROR(ENOMEM);
+ ret = ff_filter_frame(outlink, clone);
if (ret < 0)
return ret;
}
}
pad = (AVFilterPad){
- .name = av_strdup("default"),
+ .name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.config_props = config_output,
};
- if (!pad.name)
- return AVERROR(ENOMEM);
+ ret = ff_insert_outpad(ctx, 0, &pad);
+ if (ret < 0)
+ return ret;
if (s->response) {
vpad = (AVFilterPad){
- .name = av_strdup("filter_response"),
+ .name = "filter_response",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_video,
};
- if (!vpad.name)
- return AVERROR(ENOMEM);
- }
-
- ret = ff_insert_outpad(ctx, 0, &pad);
- if (ret < 0)
- return ret;
- if (s->response) {
ret = ff_insert_outpad(ctx, 1, &vpad);
if (ret < 0)
return ret;
}
av_freep(&s->iir);
- av_freep(&ctx->output_pads[0].name);
- if (s->response)
- av_freep(&ctx->output_pads[1].name);
av_frame_free(&s->video);
}
#define VF AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
static const AVOption aiir_options[] = {
+ { "zeros", "set B/numerator/zeros coefficients", OFFSET(b_str), AV_OPT_TYPE_STRING, {.str="1+0i 1-0i"}, 0, 0, AF },
{ "z", "set B/numerator/zeros coefficients", OFFSET(b_str), AV_OPT_TYPE_STRING, {.str="1+0i 1-0i"}, 0, 0, AF },
+ { "poles", "set A/denominator/poles coefficients", OFFSET(a_str),AV_OPT_TYPE_STRING, {.str="1+0i 1-0i"}, 0, 0, AF },
{ "p", "set A/denominator/poles coefficients", OFFSET(a_str), AV_OPT_TYPE_STRING, {.str="1+0i 1-0i"}, 0, 0, AF },
+ { "gains", "set channels gains", OFFSET(g_str), AV_OPT_TYPE_STRING, {.str="1|1"}, 0, 0, AF },
{ "k", "set channels gains", OFFSET(g_str), AV_OPT_TYPE_STRING, {.str="1|1"}, 0, 0, AF },
{ "dry", "set dry gain", OFFSET(dry_gain), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, AF },
{ "wet", "set wet gain", OFFSET(wet_gain), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, AF },
- { "f", "set coefficients format", OFFSET(format), AV_OPT_TYPE_INT, {.i64=1}, 0, 3, AF, "format" },
- { "tf", "transfer function", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "format" },
+ { "format", "set coefficients format", OFFSET(format), AV_OPT_TYPE_INT, {.i64=1}, 0, 4, AF, "format" },
+ { "f", "set coefficients format", OFFSET(format), AV_OPT_TYPE_INT, {.i64=1}, 0, 4, AF, "format" },
+ { "tf", "digital transfer function", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "format" },
{ "zp", "Z-plane zeros/poles", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "format" },
{ "pr", "Z-plane zeros/poles (polar radians)", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, AF, "format" },
{ "pd", "Z-plane zeros/poles (polar degrees)", 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, AF, "format" },
+ { "sp", "S-plane zeros/poles", 0, AV_OPT_TYPE_CONST, {.i64=4}, 0, 0, AF, "format" },
+ { "process", "set kind of processing", OFFSET(process), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, AF, "process" },
{ "r", "set kind of processing", OFFSET(process), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, AF, "process" },
{ "d", "direct", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "process" },
{ "s", "serial cascading", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "process" },
+ { "precision", "set filtering precision", OFFSET(precision),AV_OPT_TYPE_INT, {.i64=0}, 0, 3, AF, "precision" },
{ "e", "set precision", OFFSET(precision),AV_OPT_TYPE_INT, {.i64=0}, 0, 3, AF, "precision" },
{ "dbl", "double-precision floating-point", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "precision" },
{ "flt", "single-precision floating-point", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "precision" },
{ "i32", "32-bit integers", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, AF, "precision" },
{ "i16", "16-bit integers", 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, AF, "precision" },
+ { "normalize", "normalize coefficients", OFFSET(normalize),AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, AF },
+ { "n", "normalize coefficients", OFFSET(normalize),AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, AF },
{ "mix", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, AF },
{ "response", "show IR frequency response", OFFSET(response), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, VF },
{ "channel", "set IR channel to display frequency response", OFFSET(ir_channel), AV_OPT_TYPE_INT, {.i64=0}, 0, 1024, VF },
projects / ffmpeg / blobdiff