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avfilter/af_apulsator: stop limiting processing to stereo layout

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Paul B Mahol 2024-10-08 21:10:19 +02:00
parent ea70d17d46
commit 57269f669e
1 changed files with 134 additions and 135 deletions
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269
libavfilter/af_apulsator.c
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@ -20,7 +20,9 @@
#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
@ -29,101 +31,115 @@
enum PulsatorModes { SINE, TRIANGLE, SQUARE, SAWUP, SAWDOWN, NB_MODES };
enum PulsatorTimings { UNIT_BPM, UNIT_MS, UNIT_HZ, NB_TIMINGS };
typedef struct SimpleLFO {
double phase;
double freq;
double offset;
double amount;
double pwidth;
int mode;
int srate;
} SimpleLFO;
typedef struct AudioPulsatorContext {
const AVClass *class;
int mode;
double level_in;
double level_out;
double amount;
double offset_l;
double offset_r;
double pwidth;
double bpm;
double hertz;
int ms;
int timing;
SimpleLFO lfoL, lfoR;
int *mode;
unsigned nb_mode;
double *level_in;
unsigned nb_level_in;
double *level_out;
unsigned nb_level_out;
double *amount;
unsigned nb_amount;
double *offset;
unsigned nb_offset;
double *width;
unsigned nb_width;
double *bpm;
unsigned nb_bpm;
double *hertz;
unsigned nb_hertz;
double *ms;
unsigned nb_ms;
int *timing;
unsigned nb_timing;
double *phase;
} AudioPulsatorContext;
#define OFFSET(x) offsetof(AudioPulsatorContext, x)
#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define AR AV_OPT_TYPE_FLAG_ARRAY
static const AVOptionArrayDef def_level = {.def="1",.size_min=1,.sep=' '};
static const AVOptionArrayDef def_mode = {.def="sine",.size_min=1,.sep=' '};
static const AVOptionArrayDef def_amount= {.def="1",.size_min=1,.sep=' '};
static const AVOptionArrayDef def_offset= {.def="0",.size_min=1,.sep=' '};
static const AVOptionArrayDef def_width = {.def="1",.size_min=1,.sep=' '};
static const AVOptionArrayDef def_timing= {.def="hz",.size_min=1,.sep=' '};
static const AVOptionArrayDef def_bpm = {.def="120",.size_min=1,.sep=' '};
static const AVOptionArrayDef def_ms = {.def="500",.size_min=1,.sep=' '};
static const AVOptionArrayDef def_hz = {.def="2",.size_min=1,.sep=' '};
static const AVOption apulsator_options[] = {
{ "level_in", "set input gain", OFFSET(level_in), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, FLAGS, },
{ "level_out", "set output gain", OFFSET(level_out), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, FLAGS, },
{ "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=SINE}, SINE, NB_MODES-1, FLAGS, .unit = "mode" },
{ "sine", NULL, 0, AV_OPT_TYPE_CONST, {.i64=SINE}, 0, 0, FLAGS, .unit = "mode" },
{ "triangle", NULL, 0, AV_OPT_TYPE_CONST, {.i64=TRIANGLE},0, 0, FLAGS, .unit = "mode" },
{ "square", NULL, 0, AV_OPT_TYPE_CONST, {.i64=SQUARE}, 0, 0, FLAGS, .unit = "mode" },
{ "sawup", NULL, 0, AV_OPT_TYPE_CONST, {.i64=SAWUP}, 0, 0, FLAGS, .unit = "mode" },
{ "sawdown", NULL, 0, AV_OPT_TYPE_CONST, {.i64=SAWDOWN}, 0, 0, FLAGS, .unit = "mode" },
{ "amount", "set modulation", OFFSET(amount), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
{ "offset_l", "set offset L", OFFSET(offset_l), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS },
{ "offset_r", "set offset R", OFFSET(offset_r), AV_OPT_TYPE_DOUBLE, {.dbl=.5}, 0, 1, FLAGS },
{ "width", "set pulse width", OFFSET(pwidth), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 2, FLAGS },
{ "timing", "set timing", OFFSET(timing), AV_OPT_TYPE_INT, {.i64=2}, 0, NB_TIMINGS-1, FLAGS, .unit = "timing" },
{ "bpm", NULL, 0, AV_OPT_TYPE_CONST, {.i64=UNIT_BPM}, 0, 0, FLAGS, .unit = "timing" },
{ "ms", NULL, 0, AV_OPT_TYPE_CONST, {.i64=UNIT_MS}, 0, 0, FLAGS, .unit = "timing" },
{ "hz", NULL, 0, AV_OPT_TYPE_CONST, {.i64=UNIT_HZ}, 0, 0, FLAGS, .unit = "timing" },
{ "bpm", "set BPM", OFFSET(bpm), AV_OPT_TYPE_DOUBLE, {.dbl=120}, 30, 300, FLAGS },
{ "ms", "set ms", OFFSET(ms), AV_OPT_TYPE_INT, {.i64=500}, 10, 2000, FLAGS },
{ "hz", "set frequency", OFFSET(hertz), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 0.01, 100, FLAGS },
{ "level_in", "set input gain", OFFSET(level_in), AV_OPT_TYPE_DOUBLE|AR, {.arr=&def_level}, 0.015625, 64, FLAGS, },
{ "level_out", "set output gain", OFFSET(level_out), AV_OPT_TYPE_DOUBLE|AR, {.arr=&def_level}, 0.015625, 64, FLAGS, },
{ "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT|AR, {.arr=&def_mode}, SINE, NB_MODES-1, FLAGS, .unit = "mode" },
{ "sine", NULL, 0, AV_OPT_TYPE_CONST, {.i64=SINE}, 0, 0, FLAGS, .unit = "mode" },
{ "triangle", NULL, 0, AV_OPT_TYPE_CONST, {.i64=TRIANGLE},0, 0, FLAGS, .unit = "mode" },
{ "square", NULL, 0, AV_OPT_TYPE_CONST, {.i64=SQUARE}, 0, 0, FLAGS, .unit = "mode" },
{ "sawup", NULL, 0, AV_OPT_TYPE_CONST, {.i64=SAWUP}, 0, 0, FLAGS, .unit = "mode" },
{ "sawdown", NULL, 0, AV_OPT_TYPE_CONST, {.i64=SAWDOWN}, 0, 0, FLAGS, .unit = "mode" },
{ "amount", "set modulation", OFFSET(amount), AV_OPT_TYPE_DOUBLE|AR, {.arr=&def_amount}, 0, 1, FLAGS },
{ "offset", "set offset", OFFSET(offset), AV_OPT_TYPE_DOUBLE|AR, {.arr=&def_offset}, 0, 1, FLAGS },
{ "width", "set pulse width", OFFSET(width), AV_OPT_TYPE_DOUBLE|AR, {.arr=&def_width}, 0.01, 1.99, FLAGS },
{ "timing", "set timing", OFFSET(timing), AV_OPT_TYPE_INT|AR, {.arr=&def_timing},0,NB_TIMINGS-1,FLAGS,.unit = "timing" },
{ "bpm", NULL, 0, AV_OPT_TYPE_CONST, {.i64=UNIT_BPM},0, 0, FLAGS, .unit = "timing" },
{ "ms", NULL, 0, AV_OPT_TYPE_CONST, {.i64=UNIT_MS}, 0, 0, FLAGS, .unit = "timing" },
{ "hz", NULL, 0, AV_OPT_TYPE_CONST, {.i64=UNIT_HZ}, 0, 0, FLAGS, .unit = "timing" },
{ "bpm", "set BPM", OFFSET(bpm), AV_OPT_TYPE_DOUBLE|AR, {.arr=&def_bpm},30, 300, FLAGS },
{ "ms", "set ms", OFFSET(ms), AV_OPT_TYPE_DOUBLE|AR, {.arr=&def_ms}, 10, 2000, FLAGS },
{ "hz", "set frequency", OFFSET(hertz), AV_OPT_TYPE_DOUBLE|AR, {.arr=&def_hz}, 0.01, 100, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(apulsator);
static void lfo_advance(SimpleLFO *lfo, unsigned count)
static double lfo_get_value(const int mode, double amount,
double phase, double width, double offset)
{
lfo->phase = fabs(lfo->phase + count * lfo->freq / lfo->srate);
if (lfo->phase >= 1)
lfo->phase = fmod(lfo->phase, 1);
}
static double lfo_get_value(SimpleLFO *lfo)
{
double phs = FFMIN(100, lfo->phase / FFMIN(1.99, FFMAX(0.01, lfo->pwidth)) + lfo->offset);
double phs = phase / width + offset;
double val;
if (phs > 1)
phs = fmod(phs, 1.);
switch (lfo->mode) {
switch (mode) {
case SINE:
val = sin(phs * 2 * M_PI);
val = sin(phs * 2.0 * M_PI);
break;
case TRIANGLE:
if (phs > 0.75)
val = (phs - 0.75) * 4 - 1;
val = (phs - 0.75) * 4.0 - 1.0;
else if (phs > 0.25)
val = -4 * phs + 2;
val = -4.0 * phs + 2.0;
else
val = phs * 4;
val = phs * 4.0;
break;
case SQUARE:
val = phs < 0.5 ? -1 : +1;
val = phs < 0.5 ? -1.0 : 1.0;
break;
case SAWUP:
val = phs * 2 - 1;
val = phs * 2.0 - 1.0;
break;
case SAWDOWN:
val = 1 - phs * 2;
val = 1.0 - phs * 2.0;
break;
default: av_assert0(0);
default:
av_assert0(0);
}
return val * lfo->amount;
return val * amount;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
@ -131,14 +147,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
AudioPulsatorContext *s = ctx->priv;
const double *src = (const double *)in->data[0];
const int nb_samples = in->nb_samples;
const double level_out = s->level_out;
const double level_in = s->level_in;
const double amount = s->amount;
AVFrame *out;
double *dst;
int n;
if (av_frame_is_writable(in)) {
out = in;
@ -150,33 +159,58 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
}
av_frame_copy_props(out, in);
}
dst = (double *)out->data[0];
for (n = 0; n < nb_samples; n++) {
double outL;
double outR;
double inL = src[0] * level_in;
double inR = src[1] * level_in;
double procL = inL;
double procR = inR;
for (int ch = 0; ch < in->ch_layout.nb_channels; ch++) {
const double *src = (const double *)in->extended_data[ch];
const double level_out = s->level_out[FFMIN(ch, s->nb_level_out-1)];
const double level_in = s->level_in[FFMIN(ch, s->nb_level_in-1)];
const double amount = s->amount[FFMIN(ch, s->nb_amount-1)];
const int timing = s->timing[FFMIN(ch, s->nb_timing-1)];
const double offset = s->offset[FFMIN(ch, s->nb_offset-1)];
const double width = s->width[FFMIN(ch, s->nb_width-1)];
const double hertz = s->hertz[FFMIN(ch, s->nb_hertz-1)];
const double bpm = s->bpm[FFMIN(ch, s->nb_bpm-1)];
const int mode = s->mode[FFMIN(ch, s->nb_mode-1)];
const double ms = s->ms[FFMIN(ch, s->nb_ms-1)];
double *dst = (double *)out->extended_data[ch];
const double fs = 1.0 / inlink->sample_rate;
const int nb_samples = in->nb_samples;
double phase = s->phase[ch];
double freq;
procL *= lfo_get_value(&s->lfoL) * 0.5 + amount / 2;
procR *= lfo_get_value(&s->lfoR) * 0.5 + amount / 2;
switch (timing) {
case UNIT_BPM:
freq = bpm / 60.0;
break;
case UNIT_MS:
freq = 1.0 / (ms / 1000.0);
break;
case UNIT_HZ:
freq = hertz;
break;
default:
av_assert0(0);
}
outL = procL + inL * (1 - amount);
outR = procR + inR * (1 - amount);
for (int n = 0; n < nb_samples; n++) {
double in = src[n] * level_in;
double proc = in;
double out;
outL *= level_out;
outR *= level_out;
proc *= lfo_get_value(mode, amount, phase, width,
offset) * 0.5 + amount / 2.0;
dst[0] = outL;
dst[1] = outR;
out = proc + in * (1.0 - amount);
out *= level_out;
lfo_advance(&s->lfoL, 1);
lfo_advance(&s->lfoR, 1);
dst[n] = out;
dst += 2;
src += 2;
phase = fabs(phase + freq * fs);
if (phase >= 1.0)
phase = fmod(phase, 1.0);
}
s->phase[ch] = phase;
}
if (in != out)
@ -185,67 +219,31 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
return ff_filter_frame(outlink, out);
}
static int query_formats(const AVFilterContext *ctx,
AVFilterFormatsConfig **cfg_in,
AVFilterFormatsConfig **cfg_out)
{
static const enum AVSampleFormat formats[] = {
AV_SAMPLE_FMT_DBL,
AV_SAMPLE_FMT_NONE,
};
static const AVChannelLayout layouts[] = {
AV_CHANNEL_LAYOUT_STEREO,
{ .nb_channels = 0 },
};
int ret;
ret = ff_set_common_formats_from_list2(ctx, cfg_in, cfg_out, formats);
if (ret < 0)
return ret;
ret = ff_set_common_channel_layouts_from_list2(ctx, cfg_in, cfg_out, layouts);
if (ret < 0)
return ret;
return 0;
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
AudioPulsatorContext *s = ctx->priv;
double freq;
switch (s->timing) {
case UNIT_BPM: freq = s->bpm / 60; break;
case UNIT_MS: freq = 1 / (s->ms / 1000.); break;
case UNIT_HZ: freq = s->hertz; break;
default: av_assert0(0);
}
s->lfoL.freq = freq;
s->lfoR.freq = freq;
s->lfoL.mode = s->mode;
s->lfoR.mode = s->mode;
s->lfoL.offset = s->offset_l;
s->lfoR.offset = s->offset_r;
s->lfoL.srate = inlink->sample_rate;
s->lfoR.srate = inlink->sample_rate;
s->lfoL.amount = s->amount;
s->lfoR.amount = s->amount;
s->lfoL.pwidth = s->pwidth;
s->lfoR.pwidth = s->pwidth;
s->phase = av_calloc(inlink->ch_layout.nb_channels, sizeof(*s->phase));
if (!s->phase)
return AVERROR(ENOMEM);
return 0;
}
static av_cold void uninit(AVFilterContext *ctx)
{
AudioPulsatorContext *s = ctx->priv;
av_freep(&s->phase);
}
static const AVFilterPad inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.config_props = config_input,
.filter_frame = filter_frame,
.config_props = config_input,
},
};
@ -254,7 +252,8 @@ const AVFilter ff_af_apulsator = {
.description = NULL_IF_CONFIG_SMALL("Audio pulsator."),
.priv_size = sizeof(AudioPulsatorContext),
.priv_class = &apulsator_class,
.uninit = uninit,
FILTER_INPUTS(inputs),
FILTER_OUTPUTS(ff_audio_default_filterpad),
FILTER_QUERY_FUNC2(query_formats),
FILTER_SINGLE_SAMPLEFMT(AV_SAMPLE_FMT_DBLP),
};