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FFmpeg/libavfilter/vf_datascope.c
Paul B Mahol 42c5e1cc2a avfilter: add datascope filter 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
2016-02-26 22:22:05 +01:00

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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/avassert.h"
#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 axis;
int nb_planes;
int nb_comps;
int chars;
FFDrawContext draw;
FFDrawColor yellow;
FFDrawColor white;
FFDrawColor black;
FFDrawColor gray;
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
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, FLAGS },
{ "y", "set y offset", OFFSET(y), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS },
{ "mode", "set scope mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, FLAGS, "mode" },
{ "mono", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "mode" },
{ "color", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "mode" },
{ "color2", NULL, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "mode" },
{ "axis", "draw column/row numbers", OFFSET(axis), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
{ 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(DatascopeContext *s, 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(&s->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_color(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->desc->comp[p].depth == 8) {
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];
}
} else {
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_color(FFDrawContext *draw, FFDrawColor *color, FFDrawColor *reverse)
{
int p;
reverse->rgba[3] = 255;
for (p = 0; p < draw->nb_planes; p++) {
if (draw->desc->comp[p].depth == 8) {
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;
reverse->comp[p].u8[3] = color->comp[p].u8[3] > 127 ? 0 : 255;
} else {
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;
reverse->comp[p].u16[3] = color->comp[p].u16[3] > mid ? 0 : max;
}
}
}
typedef struct ThreadData {
AVFrame *in, *out;
int xoff, yoff;
} 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 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 W = (outlink->w - xoff) / (C * 10);
const int H = (outlink->h - yoff) / (P * 12);
const char *format[2] = {"%02X\n", "%04X\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 };
pick_color(&s->draw, &color, in, x + s->x, y + s->y, value);
reverse_color(&s->draw, &color, &reverse);
ff_fill_rectangle(&s->draw, &color, out->data, out->linesize,
xoff + x * C * 10, yoff + y * P * 12, C * 10, P * 12);
for (p = 0; p < P; p++) {
char text[256];
snprintf(text, sizeof(text), format[C>>2], value[p]);
draw_text(s, out, &reverse, xoff + x * C * 10 + 2, yoff + y * P * 12 + p * 10 + 2, text, 0);
}
}
}
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 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 W = (outlink->w - xoff) / (C * 10);
const int H = (outlink->h - yoff) / (P * 12);
const char *format[2] = {"%02X\n", "%04X\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 };
pick_color(&s->draw, &color, in, x + s->x, y + s->y, value);
for (p = 0; p < P; p++) {
char text[256];
snprintf(text, sizeof(text), format[C>>2], value[p]);
draw_text(s, out, &color, xoff + x * C * 10 + 2, yoff + y * P * 12 + p * 10 + 2, text, 0);
}
}
}
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 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 W = (outlink->w - xoff) / (C * 10);
const int H = (outlink->h - yoff) / (P * 12);
const char *format[2] = {"%02X\n", "%04X\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 };
pick_color(&s->draw, &color, in, x + s->x, y + s->y, value);
for (p = 0; p < P; p++) {
char text[256];
snprintf(text, sizeof(text), format[C>>2], value[p]);
draw_text(s, out, &s->white, xoff + x * C * 10 + 2, yoff + y * P * 12 + p * 10 + 2, text, 0);
}
}
}
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
DatascopeContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
ThreadData td = { 0 };
int ymaxlen = 0;
int xmaxlen = 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);
if (s->axis) {
const int P = FFMAX(s->nb_planes, s->nb_comps);
const int C = s->chars;
int Y = outlink->h / (P * 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) / (P * 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 * P * 12 + (P + 1) * P - 2, ymaxlen, 10);
draw_text(s, out, &s->yellow, 2, xmaxlen + y * P * 12 + (P + 1) * P, 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, out, &s->yellow, ymaxlen + x * C * 10 + 2 * C, 2, text, 1);
}
}
td.in = in; td.out = out, td.yoff = xmaxlen, td.xoff = ymaxlen;
ctx->internal->execute(ctx, s->filter, &td, NULL, FFMIN(ctx->graph->nb_threads, 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;
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, 0} );
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->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;
}
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 const AVFilterPad inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
.config_props = config_input,
},
{ NULL }
};
static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
{ NULL }
};
AVFilter ff_vf_datascope = {
.name = "datascope",
.description = NULL_IF_CONFIG_SMALL("Video data analysis."),
.priv_size = sizeof(DatascopeContext),
.priv_class = &datascope_class,
.query_formats = query_formats,
.inputs = inputs,
.outputs = outputs,
.flags = AVFILTER_FLAG_SLICE_THREADS,
};
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