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avfilter/vf_waveform: make possible to change background opacity

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Only useful if output pixel format have alpha.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2016-09-07 22:19:45 +02:00
parent 4b290078e4
commit 4fb6f9de0c
2 changed files with 20 additions and 8 deletions
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3
doc/filters.texi
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@ -14162,6 +14162,9 @@ Set scale used for displaying graticule.
@item ire
@end table
Default is digital.
@item bgopacity, b
Set background opacity.
@end table
@section weave

25
libavfilter/vf_waveform.c
View File

@ -66,9 +66,10 @@ typedef struct WaveformContext {
const AVClass *class;
int mode;
int acomp;
int dcomp;
int ncomp;
int pcomp;
const uint8_t *bg_color;
uint8_t bg_color[4];
float fintensity;
int intensity;
int mirror;
@ -76,6 +77,7 @@ typedef struct WaveformContext {
int envelope;
int graticule;
float opacity;
float bgopacity;
int estart[4];
int eend[4];
int *emax[4][4];
@ -97,6 +99,7 @@ typedef struct WaveformContext {
int column, int mirror);
void (*graticulef)(struct WaveformContext *s, AVFrame *out);
const AVPixFmtDescriptor *desc;
const AVPixFmtDescriptor *odesc;
} WaveformContext;
#define OFFSET(x) offsetof(WaveformContext, x)
@ -147,6 +150,8 @@ static const AVOption waveform_options[] = {
{ "digital", NULL, 0, AV_OPT_TYPE_CONST, {.i64=DIGITAL}, 0, 0, FLAGS, "scale" },
{ "millivolts", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MILLIVOLTS}, 0, 0, FLAGS, "scale" },
{ "ire", NULL, 0, AV_OPT_TYPE_CONST, {.i64=IRE}, 0, 0, FLAGS, "scale" },
{ "bgopacity", "set background opacity", OFFSET(bgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.75}, 0, 1, FLAGS },
{ "b", "set background opacity", OFFSET(bgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.75}, 0, 1, FLAGS },
{ NULL }
};
@ -2650,13 +2655,15 @@ static int config_input(AVFilterLink *inlink)
case AV_PIX_FMT_GBRP9:
case AV_PIX_FMT_GBRP10:
case AV_PIX_FMT_GBRP12:
s->bg_color = black_gbrp_color;
memcpy(s->bg_color, black_gbrp_color, sizeof(s->bg_color));
s->graticulef = graticule_none;
break;
default:
s->bg_color = black_yuva_color;
memcpy(s->bg_color, black_yuva_color, sizeof(s->bg_color));
}
s->bg_color[3] *= s->bgopacity;
return 0;
}
@ -2672,6 +2679,8 @@ static int config_output(AVFilterLink *outlink)
comp++;
}
s->acomp = comp;
s->odesc = av_pix_fmt_desc_get(outlink->format);
s->dcomp = s->odesc->nb_components;
av_freep(&s->peak);
@ -2733,20 +2742,20 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
out->pts = in->pts;
av_frame_set_color_range(out, AVCOL_RANGE_JPEG);
for (k = 0; k < s->ncomp; k++) {
for (k = 0; k < s->dcomp; k++) {
if (s->bits <= 8) {
for (i = 0; i < outlink->h ; i++)
memset(out->data[s->desc->comp[k].plane] +
i * out->linesize[s->desc->comp[k].plane],
memset(out->data[s->odesc->comp[k].plane] +
i * out->linesize[s->odesc->comp[k].plane],
s->bg_color[k], outlink->w);
} else {
const int mult = s->max / 256;
uint16_t *dst = (uint16_t *)out->data[s->desc->comp[k].plane];
uint16_t *dst = (uint16_t *)out->data[s->odesc->comp[k].plane];
for (i = 0; i < outlink->h ; i++) {
for (j = 0; j < outlink->w; j++)
dst[j] = s->bg_color[k] * mult;
dst += out->linesize[s->desc->comp[k].plane] / 2;
dst += out->linesize[s->odesc->comp[k].plane] / 2;
}
}
}