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avfilter/vf_histogram: add envelope to thistogram filter

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This commit is contained in:
Paul B Mahol 2019-12-30 17:21:35 +01:00
parent b2491566a6
commit f651b18c19
2 changed files with 53 additions and 3 deletions
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8
doc/filters.texi
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@ -17792,7 +17792,13 @@ Set what color components to display.
Default is @code{7}.
@item bgopacity, b
Set background opacity. Default is @code{0.5}.
Set background opacity. Default is @code{0.9}.
@item envelope, e
Show envelope. Default is disabled.
@item ecolor, ec
Set envelope color. Default is @code{gold}.
@end table
@section threshold

48
libavfilter/vf_histogram.c
View File

@ -19,6 +19,7 @@
*/
#include "libavutil/avassert.h"
#include "libavutil/colorspace.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
@ -32,6 +33,7 @@
typedef struct HistogramContext {
const AVClass *class; ///< AVClass context for log and options purpose
int thistogram;
int envelope;
unsigned histogram[256*256];
int histogram_size;
int width;
@ -41,6 +43,8 @@ typedef struct HistogramContext {
int dncomp;
uint8_t bg_color[4];
uint8_t fg_color[4];
uint8_t envelope_rgba[4];
uint8_t envelope_color[4];
int level_height;
int scale_height;
int display_mode;
@ -219,12 +223,17 @@ static int config_input(AVFilterLink *inlink)
memcpy(s->bg_color, black_gbrp_color, 4);
memcpy(s->fg_color, white_gbrp_color, 4);
s->start[0] = s->start[1] = s->start[2] = s->start[3] = 0;
memcpy(s->envelope_color, s->envelope_rgba, 4);
break;
default:
memcpy(s->bg_color, black_yuva_color, 4);
memcpy(s->fg_color, white_yuva_color, 4);
s->start[0] = s->start[3] = 0;
s->start[1] = s->start[2] = s->histogram_size / 2;
s->envelope_color[0] = RGB_TO_Y_BT709(s->envelope_rgba[0], s->envelope_rgba[1], s->envelope_rgba[2]);
s->envelope_color[1] = RGB_TO_U_BT709(s->envelope_rgba[0], s->envelope_rgba[1], s->envelope_rgba[2], 0);
s->envelope_color[2] = RGB_TO_V_BT709(s->envelope_rgba[0], s->envelope_rgba[1], s->envelope_rgba[2], 0);
s->envelope_color[3] = s->envelope_rgba[3];
}
s->fg_color[3] = s->fgopacity * 255;
@ -345,10 +354,17 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
max_hval_log = log2(max_hval + 1);
if (s->thistogram) {
int minh = s->histogram_size - 1, maxh = 0;
for (int i = 0; i < s->histogram_size; i++) {
int idx = s->histogram_size - i - 1;
int value = s->start[p];
if (s->envelope && s->histogram[idx]) {
minh = FFMIN(minh, i);
maxh = FFMAX(maxh, i);
}
if (s->levels_mode)
value += lrint(max_value * (log2(s->histogram[idx] + 1) / max_hval_log));
else
@ -360,6 +376,30 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
AV_WN16(s->out->data[p] + (i + starty) * s->out->linesize[p] + startx * 2 + s->x_pos * 2, value);
}
}
if (s->envelope) {
if (s->histogram_size <= 256) {
s->out->data[0][(minh + starty) * s->out->linesize[p] + startx + s->x_pos] = s->envelope_color[0];
s->out->data[0][(maxh + starty) * s->out->linesize[p] + startx + s->x_pos] = s->envelope_color[0];
if (s->dncomp >= 3) {
s->out->data[1][(minh + starty) * s->out->linesize[p] + startx + s->x_pos] = s->envelope_color[1];
s->out->data[2][(minh + starty) * s->out->linesize[p] + startx + s->x_pos] = s->envelope_color[2];
s->out->data[1][(maxh + starty) * s->out->linesize[p] + startx + s->x_pos] = s->envelope_color[1];
s->out->data[2][(maxh + starty) * s->out->linesize[p] + startx + s->x_pos] = s->envelope_color[2];
}
} else {
const int mult = s->mult;
AV_WN16(s->out->data[0] + (minh + starty) * s->out->linesize[p] + startx * 2 + s->x_pos * 2, s->envelope_color[0] * mult);
AV_WN16(s->out->data[0] + (maxh + starty) * s->out->linesize[p] + startx * 2 + s->x_pos * 2, s->envelope_color[0] * mult);
if (s->dncomp >= 3) {
AV_WN16(s->out->data[1] + (minh + starty) * s->out->linesize[p] + startx * 2 + s->x_pos * 2, s->envelope_color[1] * mult);
AV_WN16(s->out->data[2] + (minh + starty) * s->out->linesize[p] + startx * 2 + s->x_pos * 2, s->envelope_color[2] * mult);
AV_WN16(s->out->data[1] + (maxh + starty) * s->out->linesize[p] + startx * 2 + s->x_pos * 2, s->envelope_color[1] * mult);
AV_WN16(s->out->data[2] + (maxh + starty) * s->out->linesize[p] + startx * 2 + s->x_pos * 2, s->envelope_color[2] * mult);
}
}
}
} else {
for (i = 0; i < s->histogram_size; i++) {
int col_height;
@ -455,8 +495,12 @@ static const AVOption thistogram_options[] = {
{ "width", "set width", OFFSET(width), AV_OPT_TYPE_INT, {.i64=0}, 0, 8192, FLAGS},
{ "w", "set width", OFFSET(width), AV_OPT_TYPE_INT, {.i64=0}, 0, 8192, FLAGS},
COMMON_OPTIONS
{ "bgopacity", "set background opacity", OFFSET(bgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGS},
{ "b", "set background opacity", OFFSET(bgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGS},
{ "bgopacity", "set background opacity", OFFSET(bgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.9}, 0, 1, FLAGS},
{ "b", "set background opacity", OFFSET(bgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.9}, 0, 1, FLAGS},
{ "envelope", "display envelope", OFFSET(envelope), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
{ "e", "display envelope", OFFSET(envelope), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
{ "ecolor", "set envelope color", OFFSET(envelope_rgba), AV_OPT_TYPE_COLOR, {.str="gold"}, 0, 0, FLAGS },
{ "ec", "set envelope color", OFFSET(envelope_rgba), AV_OPT_TYPE_COLOR, {.str="gold"}, 0, 0, FLAGS },
{ NULL }
};