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avfilter: add video oscilloscope filter

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2017-04-25 19:31:05 +02:00
parent 8341d0dd0e
commit 399c7ab9c6
5 changed files with 463 additions and 0 deletions
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2
Changelog
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@ -5,6 +5,8 @@ version <next>:
- deflicker video filter
- doubleweave video filter
- lumakey video filter
- pixscope video filter
- oscilloscope video filter
version 3.3:
- CrystalHD decoder moved to new decode API

78
doc/filters.texi
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@ -10233,6 +10233,84 @@ other parameters is 0.
These parameters correspond to the parameters assigned to the
libopencv function @code{cvSmooth}.
@section oscilloscope
2D Video Oscilloscope.
Useful to measure spatial impulse, step responses, chroma delays, etc.
It accepts the following parameters:
@table @option
@item x
Set scope center x position.
@item y
Set scope center y position.
@item s
Set scope size, relative to frame diagonal.
@item t
Set scope tilt/rotation.
@item o
Set trace opacity.
@item tx
Set trace center x position.
@item ty
Set trace center y position.
@item tw
Set trace width, relative to width of frame.
@item th
Set trace height, relative to height of frame.
@item c
Set which components to trace. By default it traces first three components.
@item g
Draw trace grid. By default is enabled.
@item st
Draw some statistics. By default is enabled.
@item sc
Draw scope. By default is enabled.
@end table
@subsection Examples
@itemize
@item
Inspect full first row of video frame.
@example
oscilloscope=x=0.5:y=0:s=1
@end example
@item
Inspect full last row of video frame.
@example
oscilloscope=x=0.5:y=1:s=1
@end example
@item
Inspect full 5th line of video frame of height 1080.
@example
oscilloscope=x=0.5:y=5/1080:s=1
@end example
@item
Inspect full last column of video frame.
@example
oscilloscope=x=1:y=0.5:s=1:t=1
@end example
@end itemize
@anchor{overlay}
@section overlay

1
libavfilter/Makefile
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@ -236,6 +236,7 @@ OBJS-$(CONFIG_NULL_FILTER) += vf_null.o
OBJS-$(CONFIG_OCR_FILTER) += vf_ocr.o
OBJS-$(CONFIG_OCV_FILTER) += vf_libopencv.o
OBJS-$(CONFIG_OPENCL) += deshake_opencl.o unsharp_opencl.o
OBJS-$(CONFIG_OSCILLOSCOPE_FILTER) += vf_datascope.o
OBJS-$(CONFIG_OVERLAY_FILTER) += vf_overlay.o dualinput.o framesync.o
OBJS-$(CONFIG_OWDENOISE_FILTER) += vf_owdenoise.o
OBJS-$(CONFIG_PAD_FILTER) += vf_pad.o

1
libavfilter/allfilters.c
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@ -246,6 +246,7 @@ static void register_all(void)
REGISTER_FILTER(NULL, null, vf);
REGISTER_FILTER(OCR, ocr, vf);
REGISTER_FILTER(OCV, ocv, vf);
REGISTER_FILTER(OSCILLOSCOPE, oscilloscope, vf);
REGISTER_FILTER(OVERLAY, overlay, vf);
REGISTER_FILTER(OWDENOISE, owdenoise, vf);
REGISTER_FILTER(PAD, pad, vf);

381
libavfilter/vf_datascope.c
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@ -641,3 +641,384 @@ AVFilter ff_vf_pixscope = {
.inputs = pixscope_inputs,
.outputs = pixscope_outputs,
};
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[c] * s->height / 256;
int y = s->height - s->values[i].p[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[c] * s->height / s->max;
int y = s->height - s->values[i].p[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) {
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[c]);
min[c] = FFMIN(min[c], s->values[i].p[c]);
average[c] += s->values[i].p[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[s->rgba_map[c]], min[s->rgba_map[c]], max[s->rgba_map[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,
};