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avfilter/af_biquads: add svf transform type
This commit is contained in:
Paul B Mahol
parent
0b9dbfab48
commit
e38551180e
@ -1885,6 +1885,7 @@ Set transform type of IIR filter.
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@item dii
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@item tdii
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@item latt
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@item svf
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@end table
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@item precision, r
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@ -3249,6 +3250,7 @@ Set transform type of IIR filter.
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@item dii
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@item tdii
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@item latt
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@item svf
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@end table
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@item precision, r
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@ -3336,6 +3338,7 @@ Set transform type of IIR filter.
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@item dii
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@item tdii
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@item latt
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@item svf
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@end table
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@item precision, r
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@ -3433,6 +3436,7 @@ Set transform type of IIR filter.
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@item dii
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@item tdii
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@item latt
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@item svf
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@end table
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@item precision, r
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@ -3515,6 +3519,7 @@ Set transform type of IIR filter.
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@item dii
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@item tdii
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@item latt
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@item svf
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@end table
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@item precision, r
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@ -4265,6 +4270,7 @@ Set transform type of IIR filter.
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@item dii
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@item tdii
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@item latt
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@item svf
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@end table
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@item precision, r
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@ -4766,6 +4772,7 @@ Set transform type of IIR filter.
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@item dii
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@item tdii
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@item latt
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@item svf
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@end table
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@item precision, r
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@ -5116,6 +5123,7 @@ Set transform type of IIR filter.
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@item dii
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@item tdii
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@item latt
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@item svf
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@end table
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@item precision, r
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@ -6340,6 +6348,7 @@ Set transform type of IIR filter.
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@item dii
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@item tdii
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@item latt
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@item svf
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@end table
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@item precision, r
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@ -99,6 +99,7 @@ enum TransformType {
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DII,
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TDII,
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LATT,
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SVF,
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NB_TTYPE,
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};
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@ -419,6 +420,54 @@ BIQUAD_LATT_FILTER(s32, int32_t, INT32_MIN, INT32_MAX, 1)
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BIQUAD_LATT_FILTER(flt, float, -1., 1., 0)
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BIQUAD_LATT_FILTER(dbl, double, -1., 1., 0)
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#define BIQUAD_SVF_FILTER(name, type, min, max, need_clipping) \
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static void biquad_svf_## name (BiquadsContext *s, \
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const void *input, void *output, int len, \
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double *y0, double *y1, \
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double *unused1, double *unused2, \
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double b0, double b1, double b2, \
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double a1, double a2, int *clippings, \
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int disabled) \
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{ \
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const type *ibuf = input; \
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type *obuf = output; \
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double s0 = *y0; \
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double s1 = *y1; \
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double wet = s->mix; \
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double dry = 1. - wet; \
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double in, out; \
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double t0, t1; \
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\
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for (int i = 0; i < len; i++) { \
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in = ibuf[i]; \
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out = b2 * in + s0; \
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t0 = b0 * in + a1 * s0 + s1; \
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t1 = b1 * in + a2 * s0; \
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s0 = t0; \
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s1 = t1; \
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\
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out = out * wet + in * dry; \
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if (disabled) { \
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obuf[i] = in; \
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} else if (need_clipping && out < min) { \
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(*clippings)++; \
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obuf[i] = min; \
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} else if (need_clipping && out > max) { \
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(*clippings)++; \
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obuf[i] = max; \
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} else { \
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obuf[i] = out; \
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} \
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} \
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*y0 = s0; \
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*y1 = s1; \
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}
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BIQUAD_SVF_FILTER(s16, int16_t, INT16_MIN, INT16_MAX, 1)
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BIQUAD_SVF_FILTER(s32, int32_t, INT32_MIN, INT32_MAX, 1)
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BIQUAD_SVF_FILTER(flt, float, -1., 1., 0)
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BIQUAD_SVF_FILTER(dbl, double, -1., 1., 0)
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static void convert_dir2latt(BiquadsContext *s)
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{
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double k0, k1, v0, v1, v2;
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@ -436,6 +485,24 @@ static void convert_dir2latt(BiquadsContext *s)
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s->b2 = v2;
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}
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static void convert_dir2svf(BiquadsContext *s)
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{
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double a[2];
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double b[3];
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a[0] = -s->a1;
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a[1] = -s->a2;
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b[0] = s->b1 - s->a1 * s->b0;
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b[1] = s->b2 - s->a2 * s->b0;
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b[2] = s->b0;
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s->a1 = a[0];
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s->a2 = a[1];
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s->b0 = b[0];
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s->b1 = b[1];
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s->b2 = b[2];
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}
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static int config_filter(AVFilterLink *outlink, int reset)
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{
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AVFilterContext *ctx = outlink->src;
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@ -724,6 +791,23 @@ static int config_filter(AVFilterLink *outlink, int reset)
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default: av_assert0(0);
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}
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break;
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case SVF:
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switch (inlink->format) {
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case AV_SAMPLE_FMT_S16P:
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s->filter = biquad_svf_s16;
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break;
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case AV_SAMPLE_FMT_S32P:
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s->filter = biquad_svf_s32;
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break;
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case AV_SAMPLE_FMT_FLTP:
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s->filter = biquad_svf_flt;
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break;
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case AV_SAMPLE_FMT_DBLP:
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s->filter = biquad_svf_dbl;
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break;
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default: av_assert0(0);
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}
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break;
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default:
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av_assert0(0);
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}
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@ -732,6 +816,8 @@ static int config_filter(AVFilterLink *outlink, int reset)
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if (s->transform_type == LATT)
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convert_dir2latt(s);
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else if (s->transform_type == SVF)
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convert_dir2svf(s);
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return 0;
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}
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@ -906,6 +992,7 @@ static const AVOption equalizer_options[] = {
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{"dii", "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
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{"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
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{"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
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{"svf", "state variable filter form", 0, AV_OPT_TYPE_CONST, {.i64=SVF}, 0, 0, AF, "transform_type"},
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{"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
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{"r", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
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{"auto", "automatic", 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
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@ -947,6 +1034,7 @@ static const AVOption bass_lowshelf_options[] = {
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{"dii", "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
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{"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
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{"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
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{"svf", "state variable filter form", 0, AV_OPT_TYPE_CONST, {.i64=SVF}, 0, 0, AF, "transform_type"},
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{"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
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{"r", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
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{"auto", "automatic", 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
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@ -995,6 +1083,7 @@ static const AVOption treble_highshelf_options[] = {
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{"dii", "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
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{"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
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{"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
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{"svf", "state variable filter form", 0, AV_OPT_TYPE_CONST, {.i64=SVF}, 0, 0, AF, "transform_type"},
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{"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
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{"r", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
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{"auto", "automatic", 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
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@ -1042,6 +1131,7 @@ static const AVOption bandpass_options[] = {
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{"dii", "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
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{"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
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{"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
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{"svf", "state variable filter form", 0, AV_OPT_TYPE_CONST, {.i64=SVF}, 0, 0, AF, "transform_type"},
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{"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
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{"r", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
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{"auto", "automatic", 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
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@ -1079,6 +1169,7 @@ static const AVOption bandreject_options[] = {
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{"dii", "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
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{"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
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{"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
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{"svf", "state variable filter form", 0, AV_OPT_TYPE_CONST, {.i64=SVF}, 0, 0, AF, "transform_type"},
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{"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
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{"r", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
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{"auto", "automatic", 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
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@ -1118,6 +1209,7 @@ static const AVOption lowpass_options[] = {
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{"dii", "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
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{"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
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{"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
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{"svf", "state variable filter form", 0, AV_OPT_TYPE_CONST, {.i64=SVF}, 0, 0, AF, "transform_type"},
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{"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
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{"r", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
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{"auto", "automatic", 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
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@ -1157,6 +1249,7 @@ static const AVOption highpass_options[] = {
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{"dii", "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
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{"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
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{"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
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{"svf", "state variable filter form", 0, AV_OPT_TYPE_CONST, {.i64=SVF}, 0, 0, AF, "transform_type"},
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{"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
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{"r", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
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{"auto", "automatic", 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
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@ -1196,6 +1289,7 @@ static const AVOption allpass_options[] = {
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{"dii", "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
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{"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
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{"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
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{"svf", "state variable filter form", 0, AV_OPT_TYPE_CONST, {.i64=SVF}, 0, 0, AF, "transform_type"},
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{"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
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{"r", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
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{"auto", "automatic", 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
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@ -1228,6 +1322,7 @@ static const AVOption biquad_options[] = {
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{"dii", "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, "transform_type"},
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{"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, "transform_type"},
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{"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, "transform_type"},
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{"svf", "state variable filter form", 0, AV_OPT_TYPE_CONST, {.i64=SVF}, 0, 0, AF, "transform_type"},
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{"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
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{"r", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=-1}, -1, 3, AF, "precision"},
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{"auto", "automatic", 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "precision"},
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