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/*
* Copyright 1994-2022 Olivier Girondel
* Copyright 2019-2022 Laurent Marsac
*
* This file is part of lebiniou.
*
* lebiniou is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* lebiniou 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with lebiniou. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Plot selected path
*/
#include "context.h"
#include "paths.h"
#include "parameters.h"
#include "path.h"
#include "pthread_utils.h"
uint32_t options = BO_GFX | BO_SFX | BO_SCHEMES;
uint32_t version = 0;
enum LayerMode mode = LM_OVERLAY;
char dname[] = "Path";
char desc[] = "Path";
static uint32_t plot_length = 50; /* length of path to plot on each run */
static double radius_factor = 1; /* changes line thickness */
static pthread_mutex_t mutex;
void
init_path(uint16_t id)
{
if (!xpthread_mutex_lock(&mutex)) {
xfree(path);
path_length = paths->paths[id]->size;
path = xcalloc(path_length, sizeof(Path_point_t));
Path_scale_and_center(path, paths->paths[id]->data, path_length, scale);
xpthread_mutex_unlock(&mutex);
}
}
json_t *
get_parameters(const uint8_t fetch_all)
{
json_t *params = get_parameters_path();
plugin_parameters_add_int(params, BPP_LENGTH, (int)plot_length, 1, 1000, 1, "Length");
plugin_parameters_add_double(params, BPP_RADIUS_FACTOR, radius_factor, 0, 100, 0.1, "Radius factor");
return params;
}
void
set_parameters(const Context_t *ctx, const json_t *in_parameters)
{
uint8_t reinit_path = 0;
reinit_path |= set_parameters_path(ctx, in_parameters);
plugin_parameter_parse_int_range(in_parameters, BPP_LENGTH, (int *)&plot_length);
plugin_parameter_parse_double_range(in_parameters, BPP_RADIUS_FACTOR, &radius_factor);
if (reinit_path) {
init_path(path_id);
}
}
json_t *
parameters(const Context_t *ctx, const json_t *in_parameters, const uint8_t fetch_all)
{
if (NULL != in_parameters) {
set_parameters(ctx, in_parameters);
}
return get_parameters(fetch_all);
}
uint8_t
create(Context_t *ctx)
{
if (NULL == paths) {
return 0;
} else {
xpthread_mutex_init(&mutex, NULL);
init_path(path_id);
return 1;
}
}
void
destroy(Context_t *ctx)
{
xfree(path);
xpthread_mutex_destroy(&mutex);
}
void
run(Context_t *ctx)
{
Buffer8_t *dst = passive_buffer(ctx);
Point2d_t last;
Buffer8_clear(dst);
/* reinit path if selection changed */
if (path_idx == 0) {
if (path_id_changed) {
init_path(path_id);
path_id_changed = 0;
}
last.x = path[path_length - 1].x;
last.y = path[path_length - 1].y;
} else {
last.x = path[path_idx - 1].x;
last.y = path[path_idx - 1].y;
}
if (!xpthread_mutex_lock(&ctx->input->mutex)) {
/* if end of path is crossed durring this round, reduce length
so that the for loop ends exactly at path_length-1 */
uint32_t length = MIN(plot_length, path_length - path_idx);
/* window overlap and size for color computation (approx) */
uint32_t wo = ctx->input->size >> 1; /* overlap */
uint32_t ws = floor((double)(ctx->input->size - wo) / (double)length) + wo;
for (uint32_t l = 0; l < length; l++, path_idx++) {
uint32_t end = (l == length - 1) ? ctx->input->size : l * (ws - wo) + ws;
double win_avg = compute_avg_abs(ctx->input->data[A_MONO], l * (ws - wo), end);
Pixel_t c = MIN(1.0, color_scale * win_avg) * PIXEL_MAXVAL;
uint16_t radius = path[path_idx].radius * radius_factor;
uint16_t radius_sqr = radius * radius;
for (int16_t y = -radius; y <= radius; y++) {
for (int16_t x = -radius; x <= radius; x++) {
if (x * x + y * y <= radius_sqr) {
if (path[path_idx].connect) {
draw_line(dst, last.x, last.y, path[path_idx].x + x, path[path_idx].y + y, c);
} else {
set_pixel(dst, path[path_idx].x + x, path[path_idx].y + y, c);
}
}
}
}
last.x = path[path_idx].x;
last.y = path[path_idx].y;
}
xpthread_mutex_unlock(&ctx->input->mutex);
}
if (path_idx == path_length) {
path_idx = 0;
}
}
void
on_switch_on(Context_t *ctx)
{
// generic path parameters
path_idx = 0;
color_scale = 1;
scale = 1;
// path parameters
path_id = Shuffler_get(paths->shuffler);
plot_length = 50;
radius_factor = 1;
// re-init
init_path(path_id);
}
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