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FFmpeg/libavfilter/vf_datascope.c
Paul B Mahol d4d6b7b035 avfilter/vf_datascope: fix heap buffer overflow 
Fixes #8309
2019-10-19 09:50:53 +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/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;
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
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 },
{ "opacity", "set background opacity", OFFSET(opacity), AV_OPT_TYPE_FLOAT, {.dbl=0.75}, 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(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;
} 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 };
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 * 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->draw, 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 };
s->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->draw, 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 };
s->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->draw, 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->draw, 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->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;
ctx->internal->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->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 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,
};
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];
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, FLAGS },
{ "y", "set scope y offset", POFFSET(ypos), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGS },
{ "w", "set scope width", POFFSET(w), AV_OPT_TYPE_INT, {.i64=7}, 1, 80, FLAGS },
{ "h", "set scope height", POFFSET(h), AV_OPT_TYPE_INT, {.i64=7}, 1, 80, FLAGS },
{ "o", "set window opacity", POFFSET(o), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGS },
{ "wx", "set window x offset", POFFSET(wx), AV_OPT_TYPE_FLOAT, {.dbl=-1}, -1, 1, FLAGS },
{ "wy", "set window y offset", POFFSET(wy), AV_OPT_TYPE_FLOAT, {.dbl=-1}, -1, 1, FLAGS },
{ 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;
}
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 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++) {
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;
}
snprintf(text, sizeof(text), "CH AVG MIN MAX RMS\n");
draw_text(&s->draw, out, &s->white, X + 28, Y + s->ww + 20, 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 + 20 * (i + 2), text, 0);
}
av_frame_free(&in);
return ff_filter_frame(outlink, out);
}
static const AVFilterPad pixscope_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = pixscope_filter_frame,
.config_props = pixscope_config_input,
},
{ NULL }
};
static const AVFilterPad pixscope_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
AVFilter ff_vf_pixscope = {
.name = "pixscope",
.description = NULL_IF_CONFIG_SMALL("Pixel data analysis."),
.priv_size = sizeof(PixscopeContext),
.priv_class = &pixscope_class,
.query_formats = query_formats,
.inputs = pixscope_inputs,
.outputs = pixscope_outputs,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
};
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, FLAGS },
{ "y", "set scope y position", OOFFSET(ypos), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGS },
{ "s", "set scope size", OOFFSET(size), AV_OPT_TYPE_FLOAT, {.dbl=0.8}, 0, 1, FLAGS },
{ "t", "set scope tilt", OOFFSET(tilt), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGS },
{ "o", "set trace opacity", OOFFSET(o), AV_OPT_TYPE_FLOAT, {.dbl=0.8}, 0, 1, FLAGS },
{ "tx", "set trace x position", OOFFSET(tx), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGS },
{ "ty", "set trace y position", OOFFSET(ty), AV_OPT_TYPE_FLOAT, {.dbl=0.9}, 0, 1, FLAGS },
{ "tw", "set trace width", OOFFSET(twidth), AV_OPT_TYPE_FLOAT, {.dbl=0.8},.1, 1, FLAGS },
{ "th", "set trace height", OOFFSET(theight), AV_OPT_TYPE_FLOAT, {.dbl=0.3},.1, 1, FLAGS },
{ "c", "set components to trace", OOFFSET(components), AV_OPT_TYPE_INT, {.i64=7}, 0, 15, FLAGS },
{ "g", "draw trace grid", OOFFSET(grid), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
{ "st", "draw statistics", OOFFSET(statistics), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
{ "sc", "draw scope", OOFFSET(scope), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
{ 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 < 4; 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 < 4; i++) {
AV_WN16(out->data[0] + y0 * out->linesize[0] + 2 * (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 int oscilloscope_config_input(AVFilterLink *inlink)
{
OscilloscopeContext *s = inlink->dst->priv;
int cx, cy, size;
double tilt;
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} );
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);
cx = s->xpos * (inlink->w - 1);
cy = s->ypos * (inlink->h - 1);
s->height = s->theight * inlink->h;
s->width = s->twidth * inlink->w;
size = hypot(inlink->w, inlink->h);
s->values = av_calloc(size, sizeof(*s->values));
if (!s->values)
return AVERROR(ENOMEM);
size *= s->size;
tilt = (s->tilt - 0.5) * M_PI;
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;
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->draw.pixelstep[0]; 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->draw.pixelstep[0]; i++)
AV_WN16(out->data[0] + out->linesize[0] * y0 + 2 * 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 const AVFilterPad oscilloscope_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = oscilloscope_filter_frame,
.config_props = oscilloscope_config_input,
.needs_writable = 1,
},
{ NULL }
};
static const AVFilterPad oscilloscope_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
AVFilter ff_vf_oscilloscope = {
.name = "oscilloscope",
.description = NULL_IF_CONFIG_SMALL("2D Video Oscilloscope."),
.priv_size = sizeof(OscilloscopeContext),
.priv_class = &oscilloscope_class,
.query_formats = query_formats,
.uninit = oscilloscope_uninit,
.inputs = oscilloscope_inputs,
.outputs = oscilloscope_outputs,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
};
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