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ffmpeg.wasm-core
Commit 6121968a authored by Paul B Mahol's avatar Paul B Mahol
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avfilter/af_biquads: use the name 's' for the pointer to the private context 

Signed-off-by: 's avatarPaul B Mahol <onemda@gmail.com>
parent f27cda48
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Showing with 105 additions and 105 deletions
libavfilter/af_biquads.c
View file @ 6121968a
...@@ -118,12 +118,12 @@ typedef struct { ...@@ -118,12 +118,12 @@ typedef struct {
static av_cold int init(AVFilterContext *ctx) static av_cold int init(AVFilterContext *ctx)
{ {
BiquadsContext *p = ctx->priv; BiquadsContext *s = ctx->priv;
if (p->filter_type != biquad) { if (s->filter_type != biquad) {
if (p->frequency <= 0 || p->width <= 0) { if (s->frequency <= 0 || s->width <= 0) {
av_log(ctx, AV_LOG_ERROR, "Invalid frequency %f and/or width %f <= 0\n", av_log(ctx, AV_LOG_ERROR, "Invalid frequency %f and/or width %f <= 0\n",
p->frequency, p->width); s->frequency, s->width);
return AVERROR(EINVAL); return AVERROR(EINVAL);
} }
} }
...@@ -233,153 +233,153 @@ BIQUAD_FILTER(dbl, double, -1., 1., 0) ...@@ -233,153 +233,153 @@ BIQUAD_FILTER(dbl, double, -1., 1., 0)
static int config_output(AVFilterLink *outlink) static int config_output(AVFilterLink *outlink)
{ {
AVFilterContext *ctx = outlink->src; AVFilterContext *ctx = outlink->src;
BiquadsContext *p = ctx->priv; BiquadsContext *s = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0]; AVFilterLink *inlink = ctx->inputs[0];
double A = exp(p->gain / 40 * log(10.)); double A = exp(s->gain / 40 * log(10.));
double w0 = 2 * M_PI * p->frequency / inlink->sample_rate; double w0 = 2 * M_PI * s->frequency / inlink->sample_rate;
double alpha; double alpha;
if (w0 > M_PI) { if (w0 > M_PI) {
av_log(ctx, AV_LOG_ERROR, av_log(ctx, AV_LOG_ERROR,
"Invalid frequency %f. Frequency must be less than half the sample-rate %d.\n", "Invalid frequency %f. Frequency must be less than half the sample-rate %d.\n",
p->frequency, inlink->sample_rate); s->frequency, inlink->sample_rate);
return AVERROR(EINVAL); return AVERROR(EINVAL);
} }
switch (p->width_type) { switch (s->width_type) {
case NONE: case NONE:
alpha = 0.0; alpha = 0.0;
break; break;
case HERTZ: case HERTZ:
alpha = sin(w0) / (2 * p->frequency / p->width); alpha = sin(w0) / (2 * s->frequency / s->width);
break; break;
case OCTAVE: case OCTAVE:
alpha = sin(w0) * sinh(log(2.) / 2 * p->width * w0 / sin(w0)); alpha = sin(w0) * sinh(log(2.) / 2 * s->width * w0 / sin(w0));
break; break;
case QFACTOR: case QFACTOR:
alpha = sin(w0) / (2 * p->width); alpha = sin(w0) / (2 * s->width);
break; break;
case SLOPE: case SLOPE:
alpha = sin(w0) / 2 * sqrt((A + 1 / A) * (1 / p->width - 1) + 2); alpha = sin(w0) / 2 * sqrt((A + 1 / A) * (1 / s->width - 1) + 2);
break; break;
default: default:
av_assert0(0); av_assert0(0);
} }
switch (p->filter_type) { switch (s->filter_type) {
case biquad: case biquad:
break; break;
case equalizer: case equalizer:
p->a0 = 1 + alpha / A; s->a0 = 1 + alpha / A;
p->a1 = -2 * cos(w0); s->a1 = -2 * cos(w0);
p->a2 = 1 - alpha / A; s->a2 = 1 - alpha / A;
p->b0 = 1 + alpha * A; s->b0 = 1 + alpha * A;
p->b1 = -2 * cos(w0); s->b1 = -2 * cos(w0);
p->b2 = 1 - alpha * A; s->b2 = 1 - alpha * A;
break; break;
case bass: case bass:
p->a0 = (A + 1) + (A - 1) * cos(w0) + 2 * sqrt(A) * alpha; s->a0 = (A + 1) + (A - 1) * cos(w0) + 2 * sqrt(A) * alpha;
p->a1 = -2 * ((A - 1) + (A + 1) * cos(w0)); s->a1 = -2 * ((A - 1) + (A + 1) * cos(w0));
p->a2 = (A + 1) + (A - 1) * cos(w0) - 2 * sqrt(A) * alpha; s->a2 = (A + 1) + (A - 1) * cos(w0) - 2 * sqrt(A) * alpha;
p->b0 = A * ((A + 1) - (A - 1) * cos(w0) + 2 * sqrt(A) * alpha); s->b0 = A * ((A + 1) - (A - 1) * cos(w0) + 2 * sqrt(A) * alpha);
p->b1 = 2 * A * ((A - 1) - (A + 1) * cos(w0)); s->b1 = 2 * A * ((A - 1) - (A + 1) * cos(w0));
p->b2 = A * ((A + 1) - (A - 1) * cos(w0) - 2 * sqrt(A) * alpha); s->b2 = A * ((A + 1) - (A - 1) * cos(w0) - 2 * sqrt(A) * alpha);
break; break;
case treble: case treble:
p->a0 = (A + 1) - (A - 1) * cos(w0) + 2 * sqrt(A) * alpha; s->a0 = (A + 1) - (A - 1) * cos(w0) + 2 * sqrt(A) * alpha;
p->a1 = 2 * ((A - 1) - (A + 1) * cos(w0)); s->a1 = 2 * ((A - 1) - (A + 1) * cos(w0));
p->a2 = (A + 1) - (A - 1) * cos(w0) - 2 * sqrt(A) * alpha; s->a2 = (A + 1) - (A - 1) * cos(w0) - 2 * sqrt(A) * alpha;
p->b0 = A * ((A + 1) + (A - 1) * cos(w0) + 2 * sqrt(A) * alpha); s->b0 = A * ((A + 1) + (A - 1) * cos(w0) + 2 * sqrt(A) * alpha);
p->b1 =-2 * A * ((A - 1) + (A + 1) * cos(w0)); s->b1 =-2 * A * ((A - 1) + (A + 1) * cos(w0));
p->b2 = A * ((A + 1) + (A - 1) * cos(w0) - 2 * sqrt(A) * alpha); s->b2 = A * ((A + 1) + (A - 1) * cos(w0) - 2 * sqrt(A) * alpha);
break; break;
case bandpass: case bandpass:
if (p->csg) { if (s->csg) {
p->a0 = 1 + alpha; s->a0 = 1 + alpha;
p->a1 = -2 * cos(w0); s->a1 = -2 * cos(w0);
p->a2 = 1 - alpha; s->a2 = 1 - alpha;
p->b0 = sin(w0) / 2; s->b0 = sin(w0) / 2;
p->b1 = 0; s->b1 = 0;
p->b2 = -sin(w0) / 2; s->b2 = -sin(w0) / 2;
} else { } else {
p->a0 = 1 + alpha; s->a0 = 1 + alpha;
p->a1 = -2 * cos(w0); s->a1 = -2 * cos(w0);
p->a2 = 1 - alpha; s->a2 = 1 - alpha;
p->b0 = alpha; s->b0 = alpha;
p->b1 = 0; s->b1 = 0;
p->b2 = -alpha; s->b2 = -alpha;
} }
break; break;
case bandreject: case bandreject:
p->a0 = 1 + alpha; s->a0 = 1 + alpha;
p->a1 = -2 * cos(w0); s->a1 = -2 * cos(w0);
p->a2 = 1 - alpha; s->a2 = 1 - alpha;
p->b0 = 1; s->b0 = 1;
p->b1 = -2 * cos(w0); s->b1 = -2 * cos(w0);
p->b2 = 1; s->b2 = 1;
break; break;
case lowpass: case lowpass:
if (p->poles == 1) { if (s->poles == 1) {
p->a0 = 1; s->a0 = 1;
p->a1 = -exp(-w0); s->a1 = -exp(-w0);
p->a2 = 0; s->a2 = 0;
p->b0 = 1 + p->a1; s->b0 = 1 + s->a1;
p->b1 = 0; s->b1 = 0;
p->b2 = 0; s->b2 = 0;
} else { } else {
p->a0 = 1 + alpha; s->a0 = 1 + alpha;
p->a1 = -2 * cos(w0); s->a1 = -2 * cos(w0);
p->a2 = 1 - alpha; s->a2 = 1 - alpha;
p->b0 = (1 - cos(w0)) / 2; s->b0 = (1 - cos(w0)) / 2;
p->b1 = 1 - cos(w0); s->b1 = 1 - cos(w0);
p->b2 = (1 - cos(w0)) / 2; s->b2 = (1 - cos(w0)) / 2;
} }
break; break;
case highpass: case highpass:
if (p->poles == 1) { if (s->poles == 1) {
p->a0 = 1; s->a0 = 1;
p->a1 = -exp(-w0); s->a1 = -exp(-w0);
p->a2 = 0; s->a2 = 0;
p->b0 = (1 - p->a1) / 2; s->b0 = (1 - s->a1) / 2;
p->b1 = -p->b0; s->b1 = -s->b0;
p->b2 = 0; s->b2 = 0;
} else { } else {
p->a0 = 1 + alpha; s->a0 = 1 + alpha;
p->a1 = -2 * cos(w0); s->a1 = -2 * cos(w0);
p->a2 = 1 - alpha; s->a2 = 1 - alpha;
p->b0 = (1 + cos(w0)) / 2; s->b0 = (1 + cos(w0)) / 2;
p->b1 = -(1 + cos(w0)); s->b1 = -(1 + cos(w0));
p->b2 = (1 + cos(w0)) / 2; s->b2 = (1 + cos(w0)) / 2;
} }
break; break;
case allpass: case allpass:
p->a0 = 1 + alpha; s->a0 = 1 + alpha;
p->a1 = -2 * cos(w0); s->a1 = -2 * cos(w0);
p->a2 = 1 - alpha; s->a2 = 1 - alpha;
p->b0 = 1 - alpha; s->b0 = 1 - alpha;
p->b1 = -2 * cos(w0); s->b1 = -2 * cos(w0);
p->b2 = 1 + alpha; s->b2 = 1 + alpha;
break; break;
default: default:
av_assert0(0); av_assert0(0);
} }
p->a1 /= p->a0; s->a1 /= s->a0;
p->a2 /= p->a0; s->a2 /= s->a0;
p->b0 /= p->a0; s->b0 /= s->a0;
p->b1 /= p->a0; s->b1 /= s->a0;
p->b2 /= p->a0; s->b2 /= s->a0;
p->cache = av_realloc_f(p->cache, sizeof(ChanCache), inlink->channels); s->cache = av_realloc_f(s->cache, sizeof(ChanCache), inlink->channels);
if (!p->cache) if (!s->cache)
return AVERROR(ENOMEM); return AVERROR(ENOMEM);
memset(p->cache, 0, sizeof(ChanCache) * inlink->channels); memset(s->cache, 0, sizeof(ChanCache) * inlink->channels);
switch (inlink->format) { switch (inlink->format) {
case AV_SAMPLE_FMT_S16P: p->filter = biquad_s16; break; case AV_SAMPLE_FMT_S16P: s->filter = biquad_s16; break;
case AV_SAMPLE_FMT_S32P: p->filter = biquad_s32; break; case AV_SAMPLE_FMT_S32P: s->filter = biquad_s32; break;
case AV_SAMPLE_FMT_FLTP: p->filter = biquad_flt; break; case AV_SAMPLE_FMT_FLTP: s->filter = biquad_flt; break;
case AV_SAMPLE_FMT_DBLP: p->filter = biquad_dbl; break; case AV_SAMPLE_FMT_DBLP: s->filter = biquad_dbl; break;
default: av_assert0(0); default: av_assert0(0);
} }
...@@ -388,7 +388,7 @@ static int config_output(AVFilterLink *outlink) ...@@ -388,7 +388,7 @@ static int config_output(AVFilterLink *outlink)
static int filter_frame(AVFilterLink *inlink, AVFrame *buf) static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
{ {
BiquadsContext *p = inlink->dst->priv; BiquadsContext *s = inlink->dst->priv;
AVFilterLink *outlink = inlink->dst->outputs[0]; AVFilterLink *outlink = inlink->dst->outputs[0];
AVFrame *out_buf; AVFrame *out_buf;
int nb_samples = buf->nb_samples; int nb_samples = buf->nb_samples;
...@@ -404,11 +404,11 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *buf) ...@@ -404,11 +404,11 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
} }
for (ch = 0; ch < av_frame_get_channels(buf); ch++) for (ch = 0; ch < av_frame_get_channels(buf); ch++)
p->filter(buf->extended_data[ch], s->filter(buf->extended_data[ch],
out_buf->extended_data[ch], nb_samples, out_buf->extended_data[ch], nb_samples,
&p->cache[ch].i1, &p->cache[ch].i2, &s->cache[ch].i1, &s->cache[ch].i2,
&p->cache[ch].o1, &p->cache[ch].o2, &s->cache[ch].o1, &s->cache[ch].o2,
p->b0, p->b1, p->b2, p->a1, p->a2); s->b0, s->b1, s->b2, s->a1, s->a2);
if (buf != out_buf) if (buf != out_buf)
av_frame_free(&buf); av_frame_free(&buf);
...@@ -418,9 +418,9 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *buf) ...@@ -418,9 +418,9 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
static av_cold void uninit(AVFilterContext *ctx) static av_cold void uninit(AVFilterContext *ctx)
{ {
BiquadsContext *p = ctx->priv; BiquadsContext *s = ctx->priv;
av_freep(&p->cache); av_freep(&s->cache);
} }
static const AVFilterPad inputs[] = { static const AVFilterPad inputs[] = {
...@@ -448,9 +448,9 @@ static const AVFilterPad outputs[] = { ...@@ -448,9 +448,9 @@ static const AVFilterPad outputs[] = {
AVFILTER_DEFINE_CLASS(name_); \ AVFILTER_DEFINE_CLASS(name_); \
static av_cold int name_##_init(AVFilterContext *ctx) \ static av_cold int name_##_init(AVFilterContext *ctx) \
{ \ { \
BiquadsContext *p = ctx->priv; \ BiquadsContext *s = ctx->priv; \
p->class = &name_##_class; \ s->class = &name_##_class; \
p->filter_type = name_; \ s->filter_type = name_; \
return init(ctx); \ return init(ctx); \
} \ } \
\ \
......
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