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avfilter/avf_ahistogram: add new histogram mode option

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This commit is contained in:
Paul B Mahol 2022-03-05 21:56:31 +01:00
parent 044c09c0a0
commit fb5e871937
2 changed files with 69 additions and 10 deletions
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12
doc/filters.texi
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@ -25969,6 +25969,18 @@ replace old rows with new ones.
scroll from top to bottom.
@end table
Default is @code{replace}.
@item hmode
Set histogram mode.
It accepts the following values:
@table @samp
@item abs
Use absolute values of samples.
@item sign
Use untouched values of samples.
@end table
Default is @code{abs}.
@end table
@section aphasemeter

67
libavfilter/avf_ahistogram.c
View File

@ -32,7 +32,7 @@ enum DisplayScale { LINEAR, SQRT, CBRT, LOG, RLOG, NB_SCALES };
enum AmplitudeScale { ALINEAR, ALOG, NB_ASCALES };
enum SlideMode { REPLACE, SCROLL, NB_SLIDES };
enum DisplayMode { SINGLE, SEPARATE, NB_DMODES };
enum HistogramMode { ACCUMULATE, CURRENT, NB_HMODES };
enum HistogramMode { ABS, SIGN, NB_HMODES };
typedef struct AudioHistogramContext {
const AVClass *class;
@ -49,6 +49,7 @@ typedef struct AudioHistogramContext {
int ypos;
int slide;
int dmode;
int hmode;
int dchannels;
int count;
int frame_count;
@ -56,6 +57,8 @@ typedef struct AudioHistogramContext {
AVFrame *in[101];
int first;
int nb_samples;
int (*get_bin)(float in, int w);
} AudioHistogramContext;
#define OFFSET(x) offsetof(AudioHistogramContext, x)
@ -83,6 +86,9 @@ static const AVOption ahistogram_options[] = {
{ "slide", "set sonogram sliding", OFFSET(slide), AV_OPT_TYPE_INT, {.i64=REPLACE}, 0, NB_SLIDES-1, FLAGS, "slide" },
{ "replace", "replace old rows with new", 0, AV_OPT_TYPE_CONST, {.i64=REPLACE}, 0, 0, FLAGS, "slide" },
{ "scroll", "scroll from top to bottom", 0, AV_OPT_TYPE_CONST, {.i64=SCROLL}, 0, 0, FLAGS, "slide" },
{ "hmode", "set histograms mode", OFFSET(hmode), AV_OPT_TYPE_INT, {.i64=ABS}, 0, NB_HMODES-1, FLAGS, "hmode" },
{ "abs", "use absolute samples", 0, AV_OPT_TYPE_CONST, {.i64=ABS}, 0, 0, FLAGS, "hmode" },
{ "sign", "use unchanged samples", 0, AV_OPT_TYPE_CONST, {.i64=SIGN},0, 0, FLAGS, "hmode" },
{ NULL }
};
@ -133,6 +139,26 @@ static int config_input(AVFilterLink *inlink)
return 0;
}
static int get_lin_bin_abs(float in, int w)
{
return lrintf(av_clipf(fabsf(in), 0.f, 1.f) * (w - 1));
}
static int get_lin_bin_sign(float in, int w)
{
return lrintf((1.f + av_clipf(in, -1.f, 1.f)) * 0.5f * (w - 1));
}
static int get_log_bin_abs(float in, int w)
{
return lrintf(av_clipf(1.f + log10f(fabsf(in)) / 6.f, 0.f, 1.f) * (w - 1));
}
static int get_log_bin_sign(float in, int w)
{
return (w / 2) + FFSIGN(in) * lrintf(av_clipf(1.f + log10f(fabsf(in)) / 6.f, 0.f, 1.f) * (w / 2));
}
static int config_output(AVFilterLink *outlink)
{
AudioHistogramContext *s = outlink->src->priv;
@ -145,6 +171,27 @@ static int config_output(AVFilterLink *outlink)
s->histogram_h = s->h * s->phisto;
s->ypos = s->h * s->phisto;
switch (s->ascale) {
case ALINEAR:
switch (s->hmode) {
case ABS: s->get_bin = get_lin_bin_abs; break;
case SIGN: s->get_bin = get_lin_bin_sign; break;
default:
return AVERROR_BUG;
}
break;
case ALOG:
switch (s->hmode) {
case ABS: s->get_bin = get_log_bin_abs; break;
case SIGN: s->get_bin = get_log_bin_sign; break;
default:
return AVERROR_BUG;
}
break;
default:
return AVERROR_BUG;
}
if (s->dmode == SEPARATE) {
s->combine_buffer = av_malloc_array(outlink->w * 3, sizeof(*s->combine_buffer));
if (!s->combine_buffer)
@ -207,7 +254,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
uint64_t *achistogram = &s->achistogram[(s->dmode == SINGLE ? 0: c) * w];
for (n = 0; n < in->nb_samples; n++) {
bin = lrint(av_clipf(fabsf(src[n]), 0, 1) * (w - 1));
bin = s->get_bin(src[n], w);
achistogram[bin]++;
}
@ -217,7 +264,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
const float *src2 = (const float *)s->in[s->first]->extended_data[c];
for (n = 0; n < in->nb_samples; n++) {
bin = lrint(av_clipf(fabsf(src2[n]), 0, 1) * (w - 1));
bin = s->get_bin(src2[n], w);
shistogram[bin]++;
}
@ -230,7 +277,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
uint64_t *achistogram = &s->achistogram[(s->dmode == SINGLE ? 0: c) * w];
for (n = 0; n < in->nb_samples; n++) {
bin = lrint(av_clipf(1 + log10(fabsf(src[n])) / 6, 0, 1) * (w - 1));
bin = s->get_bin(src[n], w);
achistogram[bin]++;
}
@ -240,7 +287,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
const float *src2 = (const float *)s->in[s->first]->extended_data[c];
for (n = 0; n < in->nb_samples; n++) {
bin = lrint(av_clipf(1 + log10(fabsf(src2[n])) / 6, 0, 1) * (w - 1));
bin = s->get_bin(src2[n], w);
shistogram[bin]++;
}
@ -265,7 +312,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
float yf, uf, vf;
if (s->dmode == SEPARATE) {
yf = 256.0f / s->dchannels;
yf = 255.0f / s->dchannels;
uf = yf * M_PI;
vf = yf * M_PI;
uf *= 0.5 * sin((2 * M_PI * c) / s->dchannels);
@ -312,7 +359,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
if (s->h - H > 0) {
h = aa * 255;
s->out->data[0][s->ypos * s->out->linesize[0] + n] = h;
s->out->data[0][s->ypos * s->out->linesize[0] + n] = av_clip(h, 0, 255);
s->out->data[1][s->ypos * s->out->linesize[1] + n] = 127;
s->out->data[2][s->ypos * s->out->linesize[2] + n] = 127;
s->out->data[3][s->ypos * s->out->linesize[3] + n] = 255;
@ -326,9 +373,9 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
if (s->out->data[0][y * s->out->linesize[0] + n] != old)
break;
old = s->out->data[0][y * s->out->linesize[0] + n];
s->out->data[0][y * s->out->linesize[0] + n] = yf;
s->out->data[1][y * s->out->linesize[1] + n] = 128+uf;
s->out->data[2][y * s->out->linesize[2] + n] = 128+vf;
s->out->data[0][y * s->out->linesize[0] + n] = av_clip(yf, 0, 255);
s->out->data[1][y * s->out->linesize[1] + n] = av_clip(128.f+uf, 0, 255);
s->out->data[2][y * s->out->linesize[2] + n] = av_clip(128.f+vf, 0, 255);
s->out->data[3][y * s->out->linesize[3] + n] = 255;
}