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#include "waterfall_plot.h"
#include "imgui/imgui_internal.h"
#include <string>
#include "imgui/imgui_image.h"
#include "resources.h"
#include "logger.h"
namespace widgets
{
WaterfallPlot::WaterfallPlot(int size, int lines)
{
fft_max_size = fft_size = size;
fft_lines = lines;
}
WaterfallPlot::~WaterfallPlot()
{
if (raw_img_buffer != nullptr)
free(raw_img_buffer);
}
bool WaterfallPlot::buffer_alloc(size_t size)
{
uint32_t* new_img_buffer = (uint32_t*)realloc(raw_img_buffer, size);
if (new_img_buffer == nullptr)
{
logger->error("Cannot allocate memory for waterfall");
if (raw_img_buffer != nullptr)
{
free(raw_img_buffer);
raw_img_buffer = nullptr;
}
last_curr_height = last_curr_width = 0;
return false;
}
raw_img_buffer = new_img_buffer;
uint64_t old_size = last_curr_width * last_curr_height;
if (size > old_size * sizeof(uint32_t))
memset(&raw_img_buffer[old_size], 0, size - old_size * sizeof(uint32_t));
last_curr_width = curr_width;
last_curr_height = curr_height;
return true;
}
void WaterfallPlot::draw(ImVec2 size, bool active)
{
work_mtx.lock();
if (texture_id == 0 || active)
{
curr_width = size.x > fft_size ? fft_size : size.x;
curr_height = size.y > fft_lines ? fft_lines : size.y;
}
if (texture_id == 0)
{
texture_id = makeImageTexture();
need_update = buffer_alloc(curr_width * curr_height * sizeof(uint32_t));
if ((int)palette.size() != resolution)
set_palette(colormaps::loadMap(resources::getResourcePath("waterfall/classic.json")), false);
}
if (active && (last_curr_width != curr_width || last_curr_height != curr_height))
{
if (raw_img_buffer != nullptr && last_curr_width != curr_width)
{
free(raw_img_buffer);
raw_img_buffer = nullptr;
last_curr_height = last_curr_width = 0;
}
need_update = buffer_alloc(curr_width * curr_height * sizeof(uint32_t));
}
if (need_update)
{
updateImageTexture(texture_id, raw_img_buffer, curr_width, curr_height);
need_update = false;
}
work_mtx.unlock();
ImGui::Image((void *)(intptr_t)texture_id, size);
}
void WaterfallPlot::push_fft(float *values)
{
if (texture_id == 0 || raw_img_buffer == nullptr)
return;
work_mtx.lock();
if ((waterfall_i++ % waterfall_i_mod) == 0)
{
if (waterfall_i * 5e6 == waterfall_i_mod)
waterfall_i = 0;
memmove(&raw_img_buffer[curr_width * 1], &raw_img_buffer[curr_width * 0], curr_width * (curr_height - 1) * sizeof(uint32_t));
double fz = (double)fft_size / (double)curr_width;
for (int i = 0; i < curr_width; i++)
{
float ffpos = i * fz;
if (ffpos >= fft_size)
ffpos = fft_size - 1;
float final = -INFINITY;
for (float v = ffpos; v < ffpos + fz; v += 1)
if (final < values[(int)floor(v)])
final = values[(int)floor(v)];
int v = ((final - scale_min) / fabs(scale_max - scale_min)) * resolution;
if (v < 0)
v = 0;
if (v >= resolution)
v = resolution - 1;
raw_img_buffer[i] = palette[v];
}
need_update = true;
}
work_mtx.unlock();
}
void WaterfallPlot::set_rate(int input_rate, int output_rate)
{
work_mtx.lock();
if (output_rate <= 0)
output_rate = 1;
waterfall_i_mod = input_rate / output_rate;
if (waterfall_i_mod <= 0)
waterfall_i_mod = 1;
waterfall_i = 0;
work_mtx.unlock();
}
void WaterfallPlot::set_palette(colormaps::Map pa, bool mtx)
{
if (mtx)
work_mtx.lock();
palette = colormaps::generatePalette(pa, resolution);
if (mtx)
work_mtx.unlock();
}
}
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