27     double scale = s->dither.noise_scale;  in swri_get_dither()
39         switch(s->dither.method){  in swri_get_dither()
42                 av_assert0(s->dither.method < SWR_DITHER_NB);  in swri_get_dither()
54         switch(s->dither.method){  in swri_get_dither()
56                 av_assert0(s->dither.method < SWR_DITHER_NB);  in swri_get_dither()
84     if (s->dither.method > SWR_DITHER_TRIANGULAR_HIGHPASS && s->dither.method <= SWR_DITHER_NS)  in swri_dither_init()
95 …if(in_fmt == AV_SAMPLE_FMT_S32 && out_fmt == AV_SAMPLE_FMT_S32 && (s->dither.output_sample_bits&31…  in swri_dither_init()
100     scale *= s->dither.scale;  in swri_dither_init()
102     if (out_fmt == AV_SAMPLE_FMT_S32 && s->dither.output_sample_bits)  in swri_dither_init()
103         scale *= 1<<(32-s->dither.output_sample_bits);  in swri_dither_init()
106         s->dither.method = 0;  in swri_dither_init()
110     s->dither.ns_pos = 0;  in swri_dither_init()
111     s->dither.noise_scale=   scale;  in swri_dither_init()
112     s->dither.ns_scale   =   scale;  in swri_dither_init()
113     s->dither.ns_scale_1 = scale ? 1/scale : 0;  in swri_dither_init()
114     memset(s->dither.ns_errors, 0, sizeof(s->dither.ns_errors));  in swri_dither_init()
117         if (llabs(s->out_sample_rate - f->rate)*20 <= f->rate && f->name == s->dither.method) {  in swri_dither_init()
119             s->dither.ns_taps = f->len;  in swri_dither_init()
121                 s->dither.ns_coeffs[j] = f->coefs[j];  in swri_dither_init()
122 …s->dither.ns_scale_1 *= 1 - exp(f->gain_cB * M_LN10 * 0.005) * 2 / (1<<(8*av_get_bytes_per_sample(…  in swri_dither_init()
126     if (!filters[i].coefs && s->dither.method > SWR_DITHER_NS) {  in swri_dither_init()
128         s->dither.method = SWR_DITHER_TRIANGULAR_HIGHPASS;  in swri_dither_init()