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FFmpeg/libavfilter/vf_datascope.c
Andreas Rheinhardt b4f5201967 avfilter: Replace query_formats callback with union of list and callback 
If one looks at the many query_formats callbacks in existence,
one will immediately recognize that there is one type of default
callback for video and a slightly different default callback for
audio: It is "return ff_set_common_formats_from_list(ctx, pix_fmts);"
for video with a filter-specific pix_fmts list. For audio, it is
the same with a filter-specific sample_fmts list together with
ff_set_common_all_samplerates() and ff_set_common_all_channel_counts().

This commit allows to remove the boilerplate query_formats callbacks
by replacing said callback with a union consisting the old callback
and pointers for pixel and sample format arrays. For the not uncommon
case in which these lists only contain a single entry (besides the
sentinel) enum AVPixelFormat and enum AVSampleFormat fields are also
added to the union to store them directly in the AVFilter,
thereby avoiding a relocation.

The state of said union will be contained in a new, dedicated AVFilter
field (the nb_inputs and nb_outputs fields have been shrunk to uint8_t
in order to create a hole for this new field; this is no problem, as
the maximum of all the nb_inputs is four; for nb_outputs it is only
two).

The state's default value coincides with the earlier default of
query_formats being unset, namely that the filter accepts all formats
(and also sample rates and channel counts/layouts for audio)
provided that these properties agree coincide for all inputs and
outputs.

By using different union members for audio and video filters
the type-unsafety of using the same functions for audio and video
lists will furthermore be more confined to formats.c than before.

When the new fields are used, they will also avoid allocations:
Currently something nearly equivalent to ff_default_query_formats()
is called after every successful call to a query_formats callback;
yet in the common case that the newly allocated AVFilterFormats
are not used at all (namely if there are no free links) these newly
allocated AVFilterFormats are freed again without ever being used.
Filters no longer using the callback will not exhibit this any more.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2021-10-05 17:48:25 +02:00

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/*
* Copyright (c) 2016 Paul B Mahol
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/xga_font_data.h"
#include "avfilter.h"
#include "drawutils.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
typedef struct DatascopeContext {
const AVClass *class;
int ow, oh;
int x, y;
int mode;
int dformat;
int axis;
int components;
float opacity;
int nb_planes;
int nb_comps;
int chars;
FFDrawContext draw;
FFDrawColor yellow;
FFDrawColor white;
FFDrawColor black;
FFDrawColor gray;
void (*pick_color)(FFDrawContext *draw, FFDrawColor *color, AVFrame *in, int x, int y, int *value);
void (*reverse_color)(FFDrawContext *draw, FFDrawColor *color, FFDrawColor *reverse);
int (*filter)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
} DatascopeContext;
#define OFFSET(x) offsetof(DatascopeContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define FLAGSR AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
static const AVOption datascope_options[] = {
{ "size", "set output size", OFFSET(ow), AV_OPT_TYPE_IMAGE_SIZE, {.str="hd720"}, 0, 0, FLAGS },
{ "s", "set output size", OFFSET(ow), AV_OPT_TYPE_IMAGE_SIZE, {.str="hd720"}, 0, 0, FLAGS },
{ "x", "set x offset", OFFSET(x), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGSR },
{ "y", "set y offset", OFFSET(y), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGSR },
{ "mode", "set scope mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, FLAGSR, "mode" },
{ "mono", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGSR, "mode" },
{ "color", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGSR, "mode" },
{ "color2", NULL, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGSR, "mode" },
{ "axis", "draw column/row numbers", OFFSET(axis), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGSR },
{ "opacity", "set background opacity", OFFSET(opacity), AV_OPT_TYPE_FLOAT, {.dbl=0.75}, 0, 1, FLAGSR },
{ "format", "set display number format", OFFSET(dformat), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGSR, "format" },
{ "hex", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGSR, "format" },
{ "dec", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGSR, "format" },
{ "components", "set components to display", OFFSET(components), AV_OPT_TYPE_INT, {.i64=15}, 1, 15, FLAGSR },
{ NULL }
};
AVFILTER_DEFINE_CLASS(datascope);
static int query_formats(AVFilterContext *ctx)
{
return ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
}
static void draw_text(FFDrawContext *draw, AVFrame *frame, FFDrawColor *color,
int x0, int y0, const uint8_t *text, int vertical)
{
int x = x0;
for (; *text; text++) {
if (*text == '\n') {
x = x0;
y0 += 8;
continue;
}
ff_blend_mask(draw, color, frame->data, frame->linesize,
frame->width, frame->height,
avpriv_cga_font + *text * 8, 1, 8, 8, 0, 0, x, y0);
if (vertical) {
x = x0;
y0 += 8;
} else {
x += 8;
}
}
}
static void pick_color8(FFDrawContext *draw, FFDrawColor *color, AVFrame *in, int x, int y, int *value)
{
int p, i;
color->rgba[3] = 255;
for (p = 0; p < draw->nb_planes; p++) {
if (draw->nb_planes == 1) {
for (i = 0; i < 4; i++) {
value[i] = in->data[0][y * in->linesize[0] + x * draw->pixelstep[0] + i];
color->comp[0].u8[i] = value[i];
}
} else {
value[p] = in->data[p][(y >> draw->vsub[p]) * in->linesize[p] + (x >> draw->hsub[p])];
color->comp[p].u8[0] = value[p];
}
}
}
static void pick_color16(FFDrawContext *draw, FFDrawColor *color, AVFrame *in, int x, int y, int *value)
{
int p, i;
color->rgba[3] = 255;
for (p = 0; p < draw->nb_planes; p++) {
if (draw->nb_planes == 1) {
for (i = 0; i < 4; i++) {
value[i] = AV_RL16(in->data[0] + y * in->linesize[0] + x * draw->pixelstep[0] + i * 2);
color->comp[0].u16[i] = value[i];
}
} else {
value[p] = AV_RL16(in->data[p] + (y >> draw->vsub[p]) * in->linesize[p] + (x >> draw->hsub[p]) * 2);
color->comp[p].u16[0] = value[p];
}
}
}
static void reverse_color8(FFDrawContext *draw, FFDrawColor *color, FFDrawColor *reverse)
{
int p;
reverse->rgba[3] = 255;
for (p = 0; p < draw->nb_planes; p++) {
reverse->comp[p].u8[0] = color->comp[p].u8[0] > 127 ? 0 : 255;
reverse->comp[p].u8[1] = color->comp[p].u8[1] > 127 ? 0 : 255;
reverse->comp[p].u8[2] = color->comp[p].u8[2] > 127 ? 0 : 255;
}
}
static void reverse_color16(FFDrawContext *draw, FFDrawColor *color, FFDrawColor *reverse)
{
int p;
reverse->rgba[3] = 255;
for (p = 0; p < draw->nb_planes; p++) {
const unsigned max = (1 << draw->desc->comp[p].depth) - 1;
const unsigned mid = (max + 1) / 2;
reverse->comp[p].u16[0] = color->comp[p].u16[0] > mid ? 0 : max;
reverse->comp[p].u16[1] = color->comp[p].u16[1] > mid ? 0 : max;
reverse->comp[p].u16[2] = color->comp[p].u16[2] > mid ? 0 : max;
}
}
typedef struct ThreadData {
AVFrame *in, *out;
int xoff, yoff, PP;
} ThreadData;
static int filter_color2(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
DatascopeContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFilterLink *inlink = ctx->inputs[0];
ThreadData *td = arg;
AVFrame *in = td->in;
AVFrame *out = td->out;
const int PP = td->PP;
const int xoff = td->xoff;
const int yoff = td->yoff;
const int P = FFMAX(s->nb_planes, s->nb_comps);
const int C = s->chars;
const int D = ((s->chars - s->dformat) >> 2) + s->dformat * 2;
const int W = (outlink->w - xoff) / (C * 10);
const int H = (outlink->h - yoff) / (PP * 12);
const char *format[4] = {"%02X\n", "%04X\n", "%03d\n", "%05d\n"};
const int slice_start = (W * jobnr) / nb_jobs;
const int slice_end = (W * (jobnr+1)) / nb_jobs;
int x, y, p;
for (y = 0; y < H && (y + s->y < inlink->h); y++) {
for (x = slice_start; x < slice_end && (x + s->x < inlink->w); x++) {
FFDrawColor color = { { 0 } };
FFDrawColor reverse = { { 0 } };
int value[4] = { 0 }, pp = 0;
s->pick_color(&s->draw, &color, in, x + s->x, y + s->y, value);
s->reverse_color(&s->draw, &color, &reverse);
ff_fill_rectangle(&s->draw, &color, out->data, out->linesize,
xoff + x * C * 10, yoff + y * PP * 12, C * 10, PP * 12);
for (p = 0; p < P; p++) {
char text[256];
if (!(s->components & (1 << p)))
continue;
snprintf(text, sizeof(text), format[D], value[p]);
draw_text(&s->draw, out, &reverse, xoff + x * C * 10 + 2, yoff + y * PP * 12 + pp * 10 + 2, text, 0);
pp++;
}
}
}
return 0;
}
static int filter_color(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
DatascopeContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFilterLink *inlink = ctx->inputs[0];
ThreadData *td = arg;
AVFrame *in = td->in;
AVFrame *out = td->out;
const int PP = td->PP;
const int xoff = td->xoff;
const int yoff = td->yoff;
const int P = FFMAX(s->nb_planes, s->nb_comps);
const int C = s->chars;
const int D = ((s->chars - s->dformat) >> 2) + s->dformat * 2;
const int W = (outlink->w - xoff) / (C * 10);
const int H = (outlink->h - yoff) / (PP * 12);
const char *format[4] = {"%02X\n", "%04X\n", "%03d\n", "%05d\n"};
const int slice_start = (W * jobnr) / nb_jobs;
const int slice_end = (W * (jobnr+1)) / nb_jobs;
int x, y, p;
for (y = 0; y < H && (y + s->y < inlink->h); y++) {
for (x = slice_start; x < slice_end && (x + s->x < inlink->w); x++) {
FFDrawColor color = { { 0 } };
int value[4] = { 0 }, pp = 0;
s->pick_color(&s->draw, &color, in, x + s->x, y + s->y, value);
for (p = 0; p < P; p++) {
char text[256];
if (!(s->components & (1 << p)))
continue;
snprintf(text, sizeof(text), format[D], value[p]);
draw_text(&s->draw, out, &color, xoff + x * C * 10 + 2, yoff + y * PP * 12 + pp * 10 + 2, text, 0);
pp++;
}
}
}
return 0;
}
static int filter_mono(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
DatascopeContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFilterLink *inlink = ctx->inputs[0];
ThreadData *td = arg;
AVFrame *in = td->in;
AVFrame *out = td->out;
const int PP = td->PP;
const int xoff = td->xoff;
const int yoff = td->yoff;
const int P = FFMAX(s->nb_planes, s->nb_comps);
const int C = s->chars;
const int D = ((s->chars - s->dformat) >> 2) + s->dformat * 2;
const int W = (outlink->w - xoff) / (C * 10);
const int H = (outlink->h - yoff) / (PP * 12);
const char *format[4] = {"%02X\n", "%04X\n", "%03d\n", "%05d\n"};
const int slice_start = (W * jobnr) / nb_jobs;
const int slice_end = (W * (jobnr+1)) / nb_jobs;
int x, y, p;
for (y = 0; y < H && (y + s->y < inlink->h); y++) {
for (x = slice_start; x < slice_end && (x + s->x < inlink->w); x++) {
FFDrawColor color = { { 0 } };
int value[4] = { 0 }, pp = 0;
s->pick_color(&s->draw, &color, in, x + s->x, y + s->y, value);
for (p = 0; p < P; p++) {
char text[256];
if (!(s->components & (1 << p)))
continue;
snprintf(text, sizeof(text), format[D], value[p]);
draw_text(&s->draw, out, &s->white, xoff + x * C * 10 + 2, yoff + y * PP * 12 + pp * 10 + 2, text, 0);
pp++;
}
}
}
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
DatascopeContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
const int P = FFMAX(s->nb_planes, s->nb_comps);
ThreadData td = { 0 };
int ymaxlen = 0;
int xmaxlen = 0;
int PP = 0;
AVFrame *out;
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
av_frame_free(&in);
return AVERROR(ENOMEM);
}
out->pts = in->pts;
ff_fill_rectangle(&s->draw, &s->black, out->data, out->linesize,
0, 0, outlink->w, outlink->h);
for (int p = 0; p < P; p++) {
if (s->components & (1 << p))
PP++;
}
PP = FFMAX(PP, 1);
if (s->axis) {
const int C = s->chars;
int Y = outlink->h / (PP * 12);
int X = outlink->w / (C * 10);
char text[256] = { 0 };
int x, y;
snprintf(text, sizeof(text), "%d", s->y + Y);
ymaxlen = strlen(text);
ymaxlen *= 10;
snprintf(text, sizeof(text), "%d", s->x + X);
xmaxlen = strlen(text);
xmaxlen *= 10;
Y = (outlink->h - xmaxlen) / (PP * 12);
X = (outlink->w - ymaxlen) / (C * 10);
for (y = 0; y < Y; y++) {
snprintf(text, sizeof(text), "%d", s->y + y);
ff_fill_rectangle(&s->draw, &s->gray, out->data, out->linesize,
0, xmaxlen + y * PP * 12 + (PP + 1) * PP - 2, ymaxlen, 10);
draw_text(&s->draw, out, &s->yellow, 2, xmaxlen + y * PP * 12 + (PP + 1) * PP, text, 0);
}
for (x = 0; x < X; x++) {
snprintf(text, sizeof(text), "%d", s->x + x);
ff_fill_rectangle(&s->draw, &s->gray, out->data, out->linesize,
ymaxlen + x * C * 10 + 2 * C - 2, 0, 10, xmaxlen);
draw_text(&s->draw, out, &s->yellow, ymaxlen + x * C * 10 + 2 * C, 2, text, 1);
}
}
td.in = in; td.out = out, td.yoff = xmaxlen, td.xoff = ymaxlen, td.PP = PP;
ff_filter_execute(ctx, s->filter, &td, NULL,
FFMIN(ff_filter_get_nb_threads(ctx), FFMAX(outlink->w / 20, 1)));
av_frame_free(&in);
return ff_filter_frame(outlink, out);
}
static int config_input(AVFilterLink *inlink)
{
DatascopeContext *s = inlink->dst->priv;
uint8_t alpha = s->opacity * 255;
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
ff_draw_init(&s->draw, inlink->format, 0);
ff_draw_color(&s->draw, &s->white, (uint8_t[]){ 255, 255, 255, 255} );
ff_draw_color(&s->draw, &s->black, (uint8_t[]){ 0, 0, 0, alpha} );
ff_draw_color(&s->draw, &s->yellow, (uint8_t[]){ 255, 255, 0, 255} );
ff_draw_color(&s->draw, &s->gray, (uint8_t[]){ 77, 77, 77, 255} );
s->chars = (s->draw.desc->comp[0].depth + 7) / 8 * 2 + s->dformat;
s->nb_comps = s->draw.desc->nb_components;
switch (s->mode) {
case 0: s->filter = filter_mono; break;
case 1: s->filter = filter_color; break;
case 2: s->filter = filter_color2; break;
}
if (s->draw.desc->comp[0].depth <= 8) {
s->pick_color = pick_color8;
s->reverse_color = reverse_color8;
} else {
s->pick_color = pick_color16;
s->reverse_color = reverse_color16;
}
return 0;
}
static int config_output(AVFilterLink *outlink)
{
DatascopeContext *s = outlink->src->priv;
outlink->h = s->oh;
outlink->w = s->ow;
outlink->sample_aspect_ratio = (AVRational){1,1};
return 0;
}
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{
int ret;
ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
if (ret < 0)
return ret;
return config_input(ctx->inputs[0]);
}
static const AVFilterPad inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
.config_props = config_input,
},
};
static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
};
const AVFilter ff_vf_datascope = {
.name = "datascope",
.description = NULL_IF_CONFIG_SMALL("Video data analysis."),
.priv_size = sizeof(DatascopeContext),
.priv_class = &datascope_class,
FILTER_INPUTS(inputs),
FILTER_OUTPUTS(outputs),
FILTER_QUERY_FUNC(query_formats),
.flags = AVFILTER_FLAG_SLICE_THREADS,
.process_command = process_command,
};
typedef struct PixscopeContext {
const AVClass *class;
float xpos, ypos;
float wx, wy;
int w, h;
float o;
int x, y;
int ww, wh;
int nb_planes;
int nb_comps;
int is_rgb;
uint8_t rgba_map[4];
FFDrawContext draw;
FFDrawColor dark;
FFDrawColor black;
FFDrawColor white;
FFDrawColor green;
FFDrawColor blue;
FFDrawColor red;
FFDrawColor *colors[4];
uint16_t values[4][80][80];
void (*pick_color)(FFDrawContext *draw, FFDrawColor *color, AVFrame *in, int x, int y, int *value);
} PixscopeContext;
#define POFFSET(x) offsetof(PixscopeContext, x)
static const AVOption pixscope_options[] = {
{ "x", "set scope x offset", POFFSET(xpos), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGSR },
{ "y", "set scope y offset", POFFSET(ypos), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGSR },
{ "w", "set scope width", POFFSET(w), AV_OPT_TYPE_INT, {.i64=7}, 1, 80, FLAGSR },
{ "h", "set scope height", POFFSET(h), AV_OPT_TYPE_INT, {.i64=7}, 1, 80, FLAGSR },
{ "o", "set window opacity", POFFSET(o), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGSR },
{ "wx", "set window x offset", POFFSET(wx), AV_OPT_TYPE_FLOAT, {.dbl=-1}, -1, 1, FLAGSR },
{ "wy", "set window y offset", POFFSET(wy), AV_OPT_TYPE_FLOAT, {.dbl=-1}, -1, 1, FLAGSR },
{ NULL }
};
AVFILTER_DEFINE_CLASS(pixscope);
static int pixscope_config_input(AVFilterLink *inlink)
{
PixscopeContext *s = inlink->dst->priv;
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
ff_draw_init(&s->draw, inlink->format, 0);
ff_draw_color(&s->draw, &s->dark, (uint8_t[]){ 0, 0, 0, s->o * 255} );
ff_draw_color(&s->draw, &s->black, (uint8_t[]){ 0, 0, 0, 255} );
ff_draw_color(&s->draw, &s->white, (uint8_t[]){ 255, 255, 255, 255} );
ff_draw_color(&s->draw, &s->green, (uint8_t[]){ 0, 255, 0, 255} );
ff_draw_color(&s->draw, &s->blue, (uint8_t[]){ 0, 0, 255, 255} );
ff_draw_color(&s->draw, &s->red, (uint8_t[]){ 255, 0, 0, 255} );
s->nb_comps = s->draw.desc->nb_components;
s->is_rgb = s->draw.desc->flags & AV_PIX_FMT_FLAG_RGB;
if (s->is_rgb) {
s->colors[0] = &s->red;
s->colors[1] = &s->green;
s->colors[2] = &s->blue;
s->colors[3] = &s->white;
ff_fill_rgba_map(s->rgba_map, inlink->format);
} else {
s->colors[0] = &s->white;
s->colors[1] = &s->blue;
s->colors[2] = &s->red;
s->colors[3] = &s->white;
s->rgba_map[0] = 0;
s->rgba_map[1] = 1;
s->rgba_map[2] = 2;
s->rgba_map[3] = 3;
}
if (s->draw.desc->comp[0].depth <= 8) {
s->pick_color = pick_color8;
} else {
s->pick_color = pick_color16;
}
if (inlink->w < 640 || inlink->h < 480) {
av_log(inlink->dst, AV_LOG_ERROR, "min supported resolution is 640x480\n");
return AVERROR(EINVAL);
}
s->ww = 300;
s->wh = 300 * 1.6;
s->x = s->xpos * (inlink->w - 1);
s->y = s->ypos * (inlink->h - 1);
if (s->x + s->w >= inlink->w || s->y + s->h >= inlink->h) {
av_log(inlink->dst, AV_LOG_WARNING, "scope position is out of range, clipping\n");
s->x = FFMIN(s->x, inlink->w - s->w);
s->y = FFMIN(s->y, inlink->h - s->h);
}
return 0;
}
#define SQR(x) ((x)*(x))
static int pixscope_filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
PixscopeContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out = ff_get_video_buffer(outlink, in->width, in->height);
int max[4] = { 0 }, min[4] = { INT_MAX, INT_MAX, INT_MAX, INT_MAX };
float average[4] = { 0 };
double std[4] = { 0 }, rms[4] = { 0 };
const char rgba[4] = { 'R', 'G', 'B', 'A' };
const char yuva[4] = { 'Y', 'U', 'V', 'A' };
int x, y, X, Y, i, w, h;
char text[128];
if (!out) {
av_frame_free(&in);
return AVERROR(ENOMEM);
}
av_frame_copy_props(out, in);
av_frame_copy(out, in);
w = s->ww / s->w;
h = s->ww / s->h;
if (s->wx >= 0) {
X = (in->width - s->ww) * s->wx;
} else {
X = (in->width - s->ww) * -s->wx;
}
if (s->wy >= 0) {
Y = (in->height - s->wh) * s->wy;
} else {
Y = (in->height - s->wh) * -s->wy;
}
if (s->wx < 0) {
if (s->x + s->w >= X && (s->x + s->w <= X + s->ww) &&
s->y + s->h >= Y && (s->y + s->h <= Y + s->wh)) {
X = (in->width - s->ww) * (1 + s->wx);
}
}
if (s->wy < 0) {
if (s->x + s->w >= X && (s->x + s->w <= X + s->ww) &&
s->y + s->h >= Y && (s->y + s->h <= Y + s->wh)) {
Y = (in->height - s->wh) * (1 + s->wy);
}
}
ff_blend_rectangle(&s->draw, &s->dark, out->data, out->linesize,
out->width, out->height,
X,
Y,
s->ww,
s->wh);
for (y = 0; y < s->h; y++) {
for (x = 0; x < s->w; x++) {
FFDrawColor color = { { 0 } };
int value[4] = { 0 };
s->pick_color(&s->draw, &color, in, x + s->x, y + s->y, value);
ff_fill_rectangle(&s->draw, &color, out->data, out->linesize,
x * w + (s->ww - 4 - (s->w * w)) / 2 + X, y * h + 2 + Y, w, h);
for (i = 0; i < 4; i++) {
s->values[i][x][y] = value[i];
rms[i] += (double)value[i] * (double)value[i];
average[i] += value[i];
min[i] = FFMIN(min[i], value[i]);
max[i] = FFMAX(max[i], value[i]);
}
}
}
ff_blend_rectangle(&s->draw, &s->black, out->data, out->linesize,
out->width, out->height,
s->x - 2, s->y - 2, s->w + 4, 1);
ff_blend_rectangle(&s->draw, &s->white, out->data, out->linesize,
out->width, out->height,
s->x - 1, s->y - 1, s->w + 2, 1);
ff_blend_rectangle(&s->draw, &s->white, out->data, out->linesize,
out->width, out->height,
s->x - 1, s->y - 1, 1, s->h + 2);
ff_blend_rectangle(&s->draw, &s->black, out->data, out->linesize,
out->width, out->height,
s->x - 2, s->y - 2, 1, s->h + 4);
ff_blend_rectangle(&s->draw, &s->white, out->data, out->linesize,
out->width, out->height,
s->x - 1, s->y + 1 + s->h, s->w + 3, 1);
ff_blend_rectangle(&s->draw, &s->black, out->data, out->linesize,
out->width, out->height,
s->x - 2, s->y + 2 + s->h, s->w + 4, 1);
ff_blend_rectangle(&s->draw, &s->white, out->data, out->linesize,
out->width, out->height,
s->x + 1 + s->w, s->y - 1, 1, s->h + 2);
ff_blend_rectangle(&s->draw, &s->black, out->data, out->linesize,
out->width, out->height,
s->x + 2 + s->w, s->y - 2, 1, s->h + 5);
for (i = 0; i < 4; i++) {
rms[i] /= s->w * s->h;
rms[i] = sqrt(rms[i]);
average[i] /= s->w * s->h;
}
for (y = 0; y < s->h; y++) {
for (x = 0; x < s->w; x++) {
for (i = 0; i < 4; i++)
std[i] += SQR(s->values[i][x][y] - average[i]);
}
}
for (i = 0; i < 4; i++) {
std[i] /= s->w * s->h;
std[i] = sqrt(std[i]);
}
snprintf(text, sizeof(text), "CH AVG MIN MAX RMS\n");
draw_text(&s->draw, out, &s->white, X + 28, Y + s->ww + 5, text, 0);
for (i = 0; i < s->nb_comps; i++) {
int c = s->rgba_map[i];
snprintf(text, sizeof(text), "%c %07.1f %05d %05d %07.1f\n", s->is_rgb ? rgba[i] : yuva[i], average[c], min[c], max[c], rms[c]);
draw_text(&s->draw, out, s->colors[i], X + 28, Y + s->ww + 15 * (i + 1), text, 0);
}
snprintf(text, sizeof(text), "CH STD\n");
draw_text(&s->draw, out, &s->white, X + 28, Y + s->ww + 15 * (0 + 5), text, 0);
for (i = 0; i < s->nb_comps; i++) {
int c = s->rgba_map[i];
snprintf(text, sizeof(text), "%c %07.2f\n", s->is_rgb ? rgba[i] : yuva[i], std[c]);
draw_text(&s->draw, out, s->colors[i], X + 28, Y + s->ww + 15 * (i + 6), text, 0);
}
av_frame_free(&in);
return ff_filter_frame(outlink, out);
}
static int pixscope_process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{
int ret;
ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
if (ret < 0)
return ret;
return pixscope_config_input(ctx->inputs[0]);
}
static const AVFilterPad pixscope_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = pixscope_filter_frame,
.config_props = pixscope_config_input,
},
};
static const AVFilterPad pixscope_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
};
const AVFilter ff_vf_pixscope = {
.name = "pixscope",
.description = NULL_IF_CONFIG_SMALL("Pixel data analysis."),
.priv_size = sizeof(PixscopeContext),
.priv_class = &pixscope_class,
FILTER_INPUTS(pixscope_inputs),
FILTER_OUTPUTS(pixscope_outputs),
FILTER_QUERY_FUNC(query_formats),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
.process_command = pixscope_process_command,
};
typedef struct PixelValues {
uint16_t p[4];
} PixelValues;
typedef struct OscilloscopeContext {
const AVClass *class;
float xpos, ypos;
float tx, ty;
float size;
float tilt;
float theight, twidth;
float o;
int components;
int grid;
int statistics;
int scope;
int x1, y1, x2, y2;
int ox, oy;
int height, width;
int max;
int nb_planes;
int nb_comps;
int is_rgb;
uint8_t rgba_map[4];
FFDrawContext draw;
FFDrawColor dark;
FFDrawColor black;
FFDrawColor white;
FFDrawColor green;
FFDrawColor blue;
FFDrawColor red;
FFDrawColor cyan;
FFDrawColor magenta;
FFDrawColor gray;
FFDrawColor *colors[4];
int nb_values;
PixelValues *values;
void (*pick_color)(FFDrawContext *draw, FFDrawColor *color, AVFrame *in, int x, int y, int *value);
void (*draw_trace)(struct OscilloscopeContext *s, AVFrame *frame);
} OscilloscopeContext;
#define OOFFSET(x) offsetof(OscilloscopeContext, x)
static const AVOption oscilloscope_options[] = {
{ "x", "set scope x position", OOFFSET(xpos), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGSR },
{ "y", "set scope y position", OOFFSET(ypos), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGSR },
{ "s", "set scope size", OOFFSET(size), AV_OPT_TYPE_FLOAT, {.dbl=0.8}, 0, 1, FLAGSR },
{ "t", "set scope tilt", OOFFSET(tilt), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGSR },
{ "o", "set trace opacity", OOFFSET(o), AV_OPT_TYPE_FLOAT, {.dbl=0.8}, 0, 1, FLAGSR },
{ "tx", "set trace x position", OOFFSET(tx), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGSR },
{ "ty", "set trace y position", OOFFSET(ty), AV_OPT_TYPE_FLOAT, {.dbl=0.9}, 0, 1, FLAGSR },
{ "tw", "set trace width", OOFFSET(twidth), AV_OPT_TYPE_FLOAT, {.dbl=0.8},.1, 1, FLAGSR },
{ "th", "set trace height", OOFFSET(theight), AV_OPT_TYPE_FLOAT, {.dbl=0.3},.1, 1, FLAGSR },
{ "c", "set components to trace", OOFFSET(components), AV_OPT_TYPE_INT, {.i64=7}, 0, 15, FLAGSR },
{ "g", "draw trace grid", OOFFSET(grid), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGSR },
{ "st", "draw statistics", OOFFSET(statistics), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGSR },
{ "sc", "draw scope", OOFFSET(scope), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGSR },
{ NULL }
};
AVFILTER_DEFINE_CLASS(oscilloscope);
static void oscilloscope_uninit(AVFilterContext *ctx)
{
OscilloscopeContext *s = ctx->priv;
av_freep(&s->values);
}
static void draw_line(FFDrawContext *draw, int x0, int y0, int x1, int y1,
AVFrame *out, FFDrawColor *color)
{
int dx = FFABS(x1 - x0), sx = x0 < x1 ? 1 : -1;
int dy = FFABS(y1 - y0), sy = y0 < y1 ? 1 : -1;
int err = (dx > dy ? dx : -dy) / 2, e2;
int p, i;
for (;;) {
if (x0 >= 0 && y0 >= 0 && x0 < out->width && y0 < out->height) {
for (p = 0; p < draw->nb_planes; p++) {
if (draw->desc->comp[p].depth == 8) {
if (draw->nb_planes == 1) {
for (i = 0; i < draw->desc->nb_components; i++) {
out->data[0][y0 * out->linesize[0] + x0 * draw->pixelstep[0] + i] = color->comp[0].u8[i];
}
} else {
out->data[p][out->linesize[p] * (y0 >> draw->vsub[p]) + (x0 >> draw->hsub[p])] = color->comp[p].u8[0];
}
} else {
if (draw->nb_planes == 1) {
for (i = 0; i < draw->desc->nb_components; i++) {
AV_WN16(out->data[0] + y0 * out->linesize[0] + (x0 * draw->pixelstep[0] + i), color->comp[0].u16[i]);
}
} else {
AV_WN16(out->data[p] + out->linesize[p] * (y0 >> draw->vsub[p]) + (x0 >> draw->hsub[p]) * 2, color->comp[p].u16[0]);
}
}
}
}
if (x0 == x1 && y0 == y1)
break;
e2 = err;
if (e2 >-dx) {
err -= dy;
x0 += sx;
}
if (e2 < dy) {
err += dx;
y0 += sy;
}
}
}
static void draw_trace8(OscilloscopeContext *s, AVFrame *frame)
{
int i, c;
for (i = 1; i < s->nb_values; i++) {
for (c = 0; c < s->nb_comps; c++) {
if ((1 << c) & s->components) {
int x = i * s->width / s->nb_values;
int px = (i - 1) * s->width / s->nb_values;
int py = s->height - s->values[i-1].p[s->rgba_map[c]] * s->height / 256;
int y = s->height - s->values[i].p[s->rgba_map[c]] * s->height / 256;
draw_line(&s->draw, s->ox + x, s->oy + y, s->ox + px, s->oy + py, frame, s->colors[c]);
}
}
}
}
static void draw_trace16(OscilloscopeContext *s, AVFrame *frame)
{
int i, c;
for (i = 1; i < s->nb_values; i++) {
for (c = 0; c < s->nb_comps; c++) {
if ((1 << c) & s->components) {
int x = i * s->width / s->nb_values;
int px = (i - 1) * s->width / s->nb_values;
int py = s->height - s->values[i-1].p[s->rgba_map[c]] * s->height / s->max;
int y = s->height - s->values[i].p[s->rgba_map[c]] * s->height / s->max;
draw_line(&s->draw, s->ox + x, s->oy + y, s->ox + px, s->oy + py, frame, s->colors[c]);
}
}
}
}
static void update_oscilloscope(AVFilterContext *ctx)
{
OscilloscopeContext *s = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
int cx, cy, size;
double tilt;
ff_draw_color(&s->draw, &s->dark, (uint8_t[]){ 0, 0, 0, s->o * 255} );
s->height = s->theight * inlink->h;
s->width = s->twidth * inlink->w;
size = hypot(inlink->w, inlink->h);
size *= s->size;
tilt = (s->tilt - 0.5) * M_PI;
cx = s->xpos * (inlink->w - 1);
cy = s->ypos * (inlink->h - 1);
s->x1 = cx - size / 2.0 * cos(tilt);
s->x2 = cx + size / 2.0 * cos(tilt);
s->y1 = cy - size / 2.0 * sin(tilt);
s->y2 = cy + size / 2.0 * sin(tilt);
s->ox = (inlink->w - s->width) * s->tx;
s->oy = (inlink->h - s->height) * s->ty;
}
static int oscilloscope_config_input(AVFilterLink *inlink)
{
OscilloscopeContext *s = inlink->dst->priv;
int size;
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
ff_draw_init(&s->draw, inlink->format, 0);
ff_draw_color(&s->draw, &s->black, (uint8_t[]){ 0, 0, 0, 255} );
ff_draw_color(&s->draw, &s->white, (uint8_t[]){ 255, 255, 255, 255} );
ff_draw_color(&s->draw, &s->green, (uint8_t[]){ 0, 255, 0, 255} );
ff_draw_color(&s->draw, &s->blue, (uint8_t[]){ 0, 0, 255, 255} );
ff_draw_color(&s->draw, &s->red, (uint8_t[]){ 255, 0, 0, 255} );
ff_draw_color(&s->draw, &s->cyan, (uint8_t[]){ 0, 255, 255, 255} );
ff_draw_color(&s->draw, &s->magenta, (uint8_t[]){ 255, 0, 255, 255} );
ff_draw_color(&s->draw, &s->gray, (uint8_t[]){ 128, 128, 128, 255} );
s->nb_comps = s->draw.desc->nb_components;
s->is_rgb = s->draw.desc->flags & AV_PIX_FMT_FLAG_RGB;
if (s->is_rgb) {
s->colors[0] = &s->red;
s->colors[1] = &s->green;
s->colors[2] = &s->blue;
s->colors[3] = &s->white;
ff_fill_rgba_map(s->rgba_map, inlink->format);
} else {
s->colors[0] = &s->white;
s->colors[1] = &s->cyan;
s->colors[2] = &s->magenta;
s->colors[3] = &s->white;
s->rgba_map[0] = 0;
s->rgba_map[1] = 1;
s->rgba_map[2] = 2;
s->rgba_map[3] = 3;
}
if (s->draw.desc->comp[0].depth <= 8) {
s->pick_color = pick_color8;
s->draw_trace = draw_trace8;
} else {
s->pick_color = pick_color16;
s->draw_trace = draw_trace16;
}
s->max = (1 << s->draw.desc->comp[0].depth);
size = hypot(inlink->w, inlink->h);
s->values = av_calloc(size, sizeof(*s->values));
if (!s->values)
return AVERROR(ENOMEM);
update_oscilloscope(inlink->dst);
return 0;
}
static void draw_scope(OscilloscopeContext *s, int x0, int y0, int x1, int y1,
AVFrame *out, PixelValues *p, int state)
{
int dx = FFABS(x1 - x0), sx = x0 < x1 ? 1 : -1;
int dy = FFABS(y1 - y0), sy = y0 < y1 ? 1 : -1;
int err = (dx > dy ? dx : -dy) / 2, e2;
for (;;) {
if (x0 >= 0 && y0 >= 0 && x0 < out->width && y0 < out->height) {
FFDrawColor color = { { 0 } };
int value[4] = { 0 };
s->pick_color(&s->draw, &color, out, x0, y0, value);
s->values[s->nb_values].p[0] = value[0];
s->values[s->nb_values].p[1] = value[1];
s->values[s->nb_values].p[2] = value[2];
s->values[s->nb_values].p[3] = value[3];
s->nb_values++;
if (s->scope) {
if (s->draw.desc->comp[0].depth == 8) {
if (s->draw.nb_planes == 1) {
int i;
for (i = 0; i < s->nb_comps; i++)
out->data[0][out->linesize[0] * y0 + x0 * s->draw.pixelstep[0] + i] = 255 * ((s->nb_values + state) & 1);
} else {
out->data[0][out->linesize[0] * y0 + x0] = 255 * ((s->nb_values + state) & 1);
}
} else {
if (s->draw.nb_planes == 1) {
int i;
for (i = 0; i < s->nb_comps; i++)
AV_WN16(out->data[0] + out->linesize[0] * y0 + x0 * s->draw.pixelstep[0] + i, (s->max - 1) * ((s->nb_values + state) & 1));
} else {
AV_WN16(out->data[0] + out->linesize[0] * y0 + 2 * x0, (s->max - 1) * ((s->nb_values + state) & 1));
}
}
}
}
if (x0 == x1 && y0 == y1)
break;
e2 = err;
if (e2 >-dx) {
err -= dy;
x0 += sx;
}
if (e2 < dy) {
err += dx;
y0 += sy;
}
}
}
static int oscilloscope_filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
AVFilterContext *ctx = inlink->dst;
OscilloscopeContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
float average[4] = { 0 };
int max[4] = { 0 };
int min[4] = { INT_MAX, INT_MAX, INT_MAX, INT_MAX };
int i, c;
s->nb_values = 0;
draw_scope(s, s->x1, s->y1, s->x2, s->y2, frame, s->values, inlink->frame_count_in & 1);
ff_blend_rectangle(&s->draw, &s->dark, frame->data, frame->linesize,
frame->width, frame->height,
s->ox, s->oy, s->width, s->height + 20 * s->statistics);
if (s->grid && outlink->h >= 10) {
ff_fill_rectangle(&s->draw, &s->gray, frame->data, frame->linesize,
s->ox, s->oy, s->width - 1, 1);
for (i = 1; i < 5; i++) {
ff_fill_rectangle(&s->draw, &s->gray, frame->data, frame->linesize,
s->ox, s->oy + i * (s->height - 1) / 4, s->width, 1);
}
for (i = 0; i < 10; i++) {
ff_fill_rectangle(&s->draw, &s->gray, frame->data, frame->linesize,
s->ox + i * (s->width - 1) / 10, s->oy, 1, s->height);
}
ff_fill_rectangle(&s->draw, &s->gray, frame->data, frame->linesize,
s->ox + s->width - 1, s->oy, 1, s->height);
}
s->draw_trace(s, frame);
for (i = 0; i < s->nb_values; i++) {
for (c = 0; c < s->nb_comps; c++) {
if ((1 << c) & s->components) {
max[c] = FFMAX(max[c], s->values[i].p[s->rgba_map[c]]);
min[c] = FFMIN(min[c], s->values[i].p[s->rgba_map[c]]);
average[c] += s->values[i].p[s->rgba_map[c]];
}
}
}
for (c = 0; c < s->nb_comps; c++) {
average[c] /= s->nb_values;
}
if (s->statistics && s->height > 10 && s->width > 280 * av_popcount(s->components)) {
for (c = 0, i = 0; c < s->nb_comps; c++) {
if ((1 << c) & s->components) {
const char rgba[4] = { 'R', 'G', 'B', 'A' };
const char yuva[4] = { 'Y', 'U', 'V', 'A' };
char text[128];
snprintf(text, sizeof(text), "%c avg:%.1f min:%d max:%d\n", s->is_rgb ? rgba[c] : yuva[c], average[c], min[c], max[c]);
draw_text(&s->draw, frame, &s->white, s->ox + 2 + 280 * i++, s->oy + s->height + 4, text, 0);
}
}
}
return ff_filter_frame(outlink, frame);
}
static int oscilloscope_process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{
int ret;
ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
if (ret < 0)
return ret;
update_oscilloscope(ctx);
return 0;
}
static const AVFilterPad oscilloscope_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE,
.filter_frame = oscilloscope_filter_frame,
.config_props = oscilloscope_config_input,
},
};
static const AVFilterPad oscilloscope_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
};
const AVFilter ff_vf_oscilloscope = {
.name = "oscilloscope",
.description = NULL_IF_CONFIG_SMALL("2D Video Oscilloscope."),
.priv_size = sizeof(OscilloscopeContext),
.priv_class = &oscilloscope_class,
.uninit = oscilloscope_uninit,
FILTER_INPUTS(oscilloscope_inputs),
FILTER_OUTPUTS(oscilloscope_outputs),
FILTER_QUERY_FUNC(query_formats),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
.process_command = oscilloscope_process_command,
};
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