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Rewrote the waterfall

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Ryzerth
2020-07-11 21:15:10 +02:00
parent 30f1b423a6
commit 370324bc68
8 changed files with 514 additions and 272 deletions
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546
src/waterfall.cpp
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@@ -1,231 +1,397 @@
#include <waterfall.h>
#include <algorithm>
#define MAP_VAL(aMin, aMax, bMin, bMax, val) ( ( ( ((val) - (aMin)) / ((aMax) - (aMin)) ) * ((bMax) - (bMin)) ) + bMin)
const float COLOR_MAP[][3] = {
{0x4A, 0x00, 0x00},
{0x75, 0x00, 0x00},
{0x9F, 0x00, 0x00},
{0xC6, 0x00, 0x00},
{0xFF, 0x00, 0x00},
{0xFE, 0x6D, 0x16},
{0xFF, 0xFF, 0x00},
{0xFF, 0xFF, 0xFF},
{0x1E, 0x90, 0xFF},
{0x00, 0x00, 0x91},
{0x00, 0x00, 0x50},
float COLOR_MAP[][3] = {
{0x00, 0x00, 0x20},
{0x00, 0x00, 0x30},
{0x00, 0x00, 0x20}
{0x00, 0x00, 0x50},
{0x00, 0x00, 0x91},
{0x1E, 0x90, 0xFF},
{0xFF, 0xFF, 0xFF},
{0xFF, 0xFF, 0x00},
{0xFE, 0x6D, 0x16},
{0xFF, 0x00, 0x00},
{0xC6, 0x00, 0x00},
{0x9F, 0x00, 0x00},
{0x75, 0x00, 0x00},
{0x4A, 0x00, 0x00}
};
bool isInArea(ImVec2 pos, ImVec2 min, ImVec2 max) {
return (pos.x >= min.x && pos.y >= min.y && pos.x < max.x && pos.y < max.y);
void doZoom(int offset, int width, int outWidth, std::vector<float> data, float* out) {
float factor = (float)width / (float)outWidth;
for (int i = 0; i < outWidth; i++) {
out[i] = data[offset + ((float)i * factor)];
}
}
float freq_ranges[] = {
1000.0f, 2000.0f, 2500.0f, 5000.0f,
10000.0f, 20000.0f, 25000.0f, 50000.0f,
100000.0f, 200000.0f, 250000.0f, 500000.0f,
1000000.0f, 2000000.0f, 2500000.0f, 5000000.0f,
10000000.0f, 20000000.0f, 25000000.0f, 50000000.0f
};
float findBestFreqRange(float bandwidth) {
for (int i = 0; i < 15; i++) {
if (bandwidth / freq_ranges[i] < 15.0f) {
return freq_ranges[i];
}
}
}
void printAndScale(float freq, char* buf) {
if (freq < 1000) {
sprintf(buf, "%.3f", freq);
}
else if (freq < 1000000) {
sprintf(buf, "%.3fK", freq / 1000.0f);
}
else if (freq < 1000000000) {
sprintf(buf, "%.3fM", freq / 1000000.0f);
}
else if (freq < 1000000000000) {
sprintf(buf, "%.3fG", freq / 1000000000.0f);
}
for (int i = strlen(buf) - 2; i >= 0; i--) {
if (buf[i] != '0') {
if (buf[i] == '.') {
i--;
}
char scale = buf[strlen(buf) - 1];
buf[i + 1] = scale;
buf[i + 2] = 0;
return;
}
}
}
namespace ImGui {
uint32_t* img = NULL;
int lastW = 0;
int lastH = 0;
WaterFall::WaterFall() {
std::vector<float> base;
for (int i = 0; i < 1024; i++) {
base.push_back(-100.0f);
}
fftBuffer.push_back(base);
newSamples = false;
fftMin = -70.0f;
fftMax = 0.0f;
waterfallMin = -70.0f;
waterfallMax = 0.0f;
fftHeight = 250;
dataWidth = 600;
lastWidgetPos.x = 0;
lastWidgetPos.y = 0;
lastWidgetSize.x = 0;
lastWidgetSize.y = 0;
latestFFT = new float[1];
waterfallFb = new uint32_t[1];
viewBandwidth = 1.0f;
wholeBandwidth = 1.0f;
glGenTextures(1, &textureId);
updatePallette(COLOR_MAP, 13);
}
void WaterFall::drawFFT(ImGuiWindow* window, int width, int height, ImVec2 pos, float* vfo) {
float lines = 6.0f;
int w = width - 10;
float lineHeight = (float)(height - 20 - 30) / lines;
void WaterFall::drawFFT() {
// Calculate scaling factor
float startLine = floorf(fftMax / 10.0f) * 10.0f;
float vertRange = fftMax - fftMin;
float scaleFactor = fftHeight / vertRange;
char buf[100];
int fftWidth = width - 50;
// Vertical scale
for (int i = 0; i < (lines + 1); i++) {
sprintf(buf, "%d", -i * 10);
for (float line = startLine; line > fftMin; line -= 10.0f) {
float yPos = widgetPos.y + fftHeight + 10 - ((line - fftMin) * scaleFactor);
window->DrawList->AddLine(ImVec2(widgetPos.x + 50, roundf(yPos)),
ImVec2(widgetPos.x + dataWidth + 50, roundf(yPos)),
IM_COL32(50, 50, 50, 255), 1.0f);
sprintf(buf, "%d", (int)line);
ImVec2 txtSz = ImGui::CalcTextSize(buf);
window->DrawList->AddText(ImVec2(pos.x + 30 - txtSz.x, pos.y + (i * lineHeight) + 2), IM_COL32( 255, 255, 255, 255 ), buf);
if (i == lines) { // Last line
window->DrawList->AddLine(ImVec2(pos.x + 40, pos.y + (i * lineHeight) + 10),
ImVec2(pos.x + width - 10, pos.y + (i * lineHeight) + 10),
IM_COL32( 255, 255, 255, 255 ), 1.0f);
break;
}
window->DrawList->AddLine(ImVec2(pos.x + 40, pos.y + (i * lineHeight) + 10),
ImVec2(pos.x + width - 10, pos.y + (i * lineHeight) + 10),
IM_COL32( 70, 70, 70, 255 ), 1.0f);
window->DrawList->AddText(ImVec2(widgetPos.x + 40 - txtSz.x, roundf(yPos - (txtSz.y / 2))), IM_COL32( 255, 255, 255, 255 ), buf);
}
// Horizontal scale
float start = ceilf((centerFrequency - (bandWidth / 2)) / range) * range;
float end = centerFrequency + (bandWidth / 2);
float offsetStart = start - (centerFrequency - (bandWidth / 2));
float pixelOffset = (offsetStart * fftWidth) / bandWidth;
float pixelWidth = (range * fftWidth) / bandWidth;
int count = 0;
for (; start < end; start += range) {
window->DrawList->AddLine(ImVec2(pos.x + pixelOffset + (pixelWidth * count) + 40, pos.y + 10),
ImVec2(pos.x + pixelOffset + (pixelWidth * count) + 40, pos.y + (lines * lineHeight) + 10),
IM_COL32( 70, 70, 70, 255 ), 1.0f);
window->DrawList->AddLine(ImVec2(pos.x + pixelOffset + (pixelWidth * count) + 40, pos.y + (lines * lineHeight) + 10),
ImVec2(pos.x + pixelOffset + (pixelWidth * count) + 40, pos.y + (lines * lineHeight) + 20),
IM_COL32( 255, 255, 255, 255 ), 1.0f);
sprintf(buf, "%.1fM", start / 1000000.0f);
float startFreq = ceilf(lowerFreq / range) * range;
float horizScale = (float)dataWidth / viewBandwidth;
for (float freq = startFreq; freq < upperFreq; freq += range) {
float xPos = widgetPos.x + 50 + ((freq - lowerFreq) * horizScale);
window->DrawList->AddLine(ImVec2(roundf(xPos), widgetPos.y + 10),
ImVec2(roundf(xPos), widgetPos.y + fftHeight + 10),
IM_COL32(50, 50, 50, 255), 1.0f);
window->DrawList->AddLine(ImVec2(roundf(xPos), widgetPos.y + fftHeight + 10),
ImVec2(roundf(xPos), widgetPos.y + fftHeight + 17),
IM_COL32(255, 255, 255, 255), 1.0f);
printAndScale(freq, buf);
ImVec2 txtSz = ImGui::CalcTextSize(buf);
window->DrawList->AddText(ImVec2(pos.x + pixelOffset + (pixelWidth * count) + 40 - (txtSz.x / 2.0f), pos.y + (lines * lineHeight) + 25), IM_COL32( 255, 255, 255, 255 ), buf);
count++;
window->DrawList->AddText(ImVec2(roundf(xPos - (txtSz.x / 2.0f)), widgetPos.y + fftHeight + 10 + txtSz.y), IM_COL32( 255, 255, 255, 255 ), buf);
}
int dataCount = fftBuffer[0].size();
float multiplier = (float)dataCount / (float)fftWidth;
if (lastW != w) {
if (fftDrawBuffer != NULL) {
delete[] fftDrawBuffer;
// Data
for (int i = 1; i < dataWidth; i++) {
float aPos = widgetPos.y + fftHeight + 10 - ((latestFFT[i - 1] - fftMin) * scaleFactor);
float bPos = widgetPos.y + fftHeight + 10 - ((latestFFT[i] - fftMin) * scaleFactor);
if (aPos < fftMin && bPos < fftMin) {
continue;
}
fftDrawBuffer = new float[fftWidth];
}
for (int i = 1; i < fftWidth; i++) {
float a = (fftBuffer[0][(int)((float)(i - 1) * multiplier)] / 10.0f) * lineHeight;
float b = (fftBuffer[0][(int)((float)i * multiplier)] / 10.0f) * lineHeight;
window->DrawList->AddLine(ImVec2(pos.x + i + 39, pos.y - a),
ImVec2(pos.x + i + 40, pos.y - b),
IM_COL32( 0, 255, 255, 255 ), 1.0f);
window->DrawList->AddLine(ImVec2(pos.x + i + 39, pos.y - a),
ImVec2(pos.x + i + 39, pos.y + (lines * lineHeight) + 9),
IM_COL32( 0, 255, 255, 50 ), 1.0f);
aPos = std::clamp<float>(aPos, widgetPos.y + 10, widgetPos.y + fftHeight + 10);
bPos = std::clamp<float>(bPos, widgetPos.y + 10, widgetPos.y + fftHeight + 10);
window->DrawList->AddLine(ImVec2(widgetPos.x + 49 + i, roundf(aPos)),
ImVec2(widgetPos.x + 50 + i, roundf(bPos)),
IM_COL32(0, 255, 255, 255), 1.0f);
window->DrawList->AddLine(ImVec2(widgetPos.x + 50 + i, roundf(bPos)),
ImVec2(widgetPos.x + 50 + i, widgetPos.y + fftHeight + 10),
IM_COL32(0, 255, 255, 50), 1.0f);
}
// window->DrawList->AddLine(ImVec2(pos.x + ((i - 1) * spacing) + 40, pos.y - a),
// ImVec2(pos.x + (i * spacing) + 40, pos.y - b),
// IM_COL32( 0, 255, 255, 255 ), 1.0f);
window->DrawList->AddLine(ImVec2(pos.x + 40, pos.y + 10), ImVec2(pos.x + 40, pos.y + (lines * lineHeight) + 10), IM_COL32( 255, 255, 255, 255 ), 1.0f);
ImVec2 mPos = ImGui::GetMousePos();
// window->DrawList->AddRectFilled(ImVec2(mPos.x - 20, pos.y + 11), ImVec2(mPos.x + 20, pos.y + (lines * lineHeight) + 10), IM_COL32( 255, 255, 255, 50 ));
// window->DrawList->AddLine(ImVec2(mPos.x, pos.y + 11), ImVec2(mPos.x, pos.y + (lines * lineHeight) + 10), IM_COL32( 255, 0, 0, 255 ), 1.0f);
float vfoPos = (((*vfo - centerFrequency) + (bandWidth / 2.0f)) / bandWidth) * (float)fftWidth + 40;
if (ImGui::IsMouseClicked(ImGuiMouseButton_Left) && isInArea(mPos, ImVec2(pos.x + 40, pos.y + 10), ImVec2(pos.x + fftWidth + 40, pos.y + (lines * lineHeight) + 10))) {
*vfo = (((((mPos.x - pos.x) - 40) / (float)fftWidth) * bandWidth) - (bandWidth / 2.0f)) + centerFrequency;
//*vfo = roundf(*vfo / 100000.0f) * 100000.0f;
}
window->DrawList->AddRectFilled(ImVec2(pos.x + vfoPos - 20, pos.y + 11), ImVec2(pos.x + vfoPos + 20, pos.y + (lines * lineHeight) + 10), IM_COL32( 255, 255, 255, 50 ));
window->DrawList->AddLine(ImVec2(pos.x + vfoPos, pos.y + 11), ImVec2(pos.x + vfoPos, pos.y + (lines * lineHeight) + 10), IM_COL32( 255, 0, 0, 255 ), 1.0f);
}
uint32_t mapColor(float val) {
float mapped = MAP_VAL(-50.0f, -15.0f, 0, 12, val);
mapped = std::max<float>(mapped, 0.0f);
mapped = std::min<float>(mapped, 12.0f);
int floored = floorf(mapped);
float ratio = mapped - (float)floored;
float r = ((COLOR_MAP[floored][2] * (1.0f - ratio)) + (COLOR_MAP[floored + 1][2] * ratio));
float g = ((COLOR_MAP[floored][1] * (1.0f - ratio)) + (COLOR_MAP[floored + 1][1] * ratio));
float b = ((COLOR_MAP[floored][0] * (1.0f - ratio)) + (COLOR_MAP[floored + 1][0] * ratio));
//printf("%f %f %f\n", r, g, b);
return ((uint32_t)255 << 24) | ((uint32_t)b << 16) | ((uint32_t)g << 8) | (uint32_t)r;
}
void WaterFall::drawWaterfall(ImGuiWindow* window, int width, int height, ImVec2 pos) {
int w = width - 10;
int h = height;
int count = fftBuffer.size();
float factor = (float)count / (float)w;
bool newSize = false;
if (lastW != w || lastH != h) {
newSize = true;
lastW = w;
lastH = h;
if (img != NULL) {
free(img);
}
printf("Allocating new buffer");
img = (uint32_t*)malloc(w * h * sizeof(uint32_t));
newSamples = true;
}
if (newSamples || newSize) {
newSamples = false;
float factor;
if (newSize) {
for (int y = 0; y < count; y++) {
factor = (float)fftBuffer[y].size() / (float)w;
for (int x = 0; x < w; x++) {
img[(y * w) + x] = mapColor(fftBuffer[y][(int)((float)x * factor)]);
}
}
}
else {
factor = (float)fftBuffer[0].size() / (float)w;
memcpy(&img[w], img, (h - 1) * w * sizeof(uint32_t));
for (int x = 0; x < w; x++) {
img[x] = mapColor(fftBuffer[0][(int)((float)x * factor)]);
}
}
glBindTexture(GL_TEXTURE_2D, textureId);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, img);
}
// X Axis
window->DrawList->AddLine(ImVec2(widgetPos.x + 50, widgetPos.y + fftHeight + 10),
ImVec2(widgetPos.x + dataWidth + 50, widgetPos.y + fftHeight + 10),
IM_COL32(255, 255, 255, 255), 1.0f);
// Y Axis
window->DrawList->AddLine(ImVec2(widgetPos.x + 50, widgetPos.y + 10),
ImVec2(widgetPos.x + 50, widgetPos.y + fftHeight + 10),
IM_COL32(255, 255, 255, 255), 1.0f);
window->DrawList->AddImage((void*)(intptr_t)textureId, ImVec2(pos.x + 40, pos.y), ImVec2(pos.x + w, pos.y + h));
}
void WaterFall::draw(float* vfo) {
ImGuiWindow* window = GetCurrentWindow();
ImVec2 vMin = ImGui::GetWindowContentRegionMin();
ImVec2 vMax = ImGui::GetWindowContentRegionMax();
vMin.x += ImGui::GetWindowPos().x;
vMin.y += ImGui::GetWindowPos().y;
vMax.x += ImGui::GetWindowPos().x;
vMax.y += ImGui::GetWindowPos().y;
int width = vMax.x - vMin.x;
int height = vMax.y - vMin.y;
window->DrawList->AddRect( vMin, vMax, IM_COL32( 50, 50, 50, 255 ) );
window->DrawList->AddLine(ImVec2(vMin.x, vMin.y + 300), ImVec2(vMin.x + width, vMin.y + 300), IM_COL32( 50, 50, 50, 255 ), 1.0f);
buf_mtx.lock();
if (fftBuffer.size() > height) {
fftBuffer.resize(height - 302);
void WaterFall::drawWaterfall() {
if (waterfallUpdate) {
waterfallUpdate = false;
updateWaterfallTexture();
}
drawFFT(window, width, 300, vMin, vfo);
drawWaterfall(window, width - 2, height - 302, ImVec2(vMin.x + 1, vMin.y + 301));
window->DrawList->AddImage((void*)(intptr_t)textureId, ImVec2(widgetPos.x + 50, widgetPos.y + fftHeight + 51),
ImVec2(widgetPos.x + 50 + dataWidth, widgetPos.y + fftHeight + 51 + waterfallHeight));
}
void WaterFall::updateWaterfallFb() {
float offsetRatio = viewOffset / (wholeBandwidth / 2.0f);
int drawDataSize;
int drawDataStart;
int count = std::min<int>(waterfallHeight, rawFFTs.size());
float* tempData = new float[dataWidth];
float pixel;
float dataRange = waterfallMax - waterfallMin;
for (int i = 0; i < count; i++) {
drawDataSize = (viewBandwidth / wholeBandwidth) * rawFFTs[i].size();
drawDataStart = (((float)rawFFTs[i].size() / 2.0f) * (offsetRatio + 1)) - (drawDataSize / 2);
doZoom(drawDataStart, drawDataSize, dataWidth, rawFFTs[i], tempData);
for (int j = 0; j < dataWidth; j++) {
pixel = (std::clamp<float>(tempData[j], waterfallMin, waterfallMax) - waterfallMin) / dataRange;
waterfallFb[(i * dataWidth) + j] = waterfallPallet[(int)(pixel * (WATERFALL_RESOLUTION - 1))];
}
}
delete[] tempData;
waterfallUpdate = true;
}
void WaterFall::updateWaterfallTexture() {
glBindTexture(GL_TEXTURE_2D, textureId);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, dataWidth, waterfallHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, (uint8_t*)waterfallFb);
}
void WaterFall::onPositionChange() {
printf("Pos changed\n");
}
void WaterFall::onResize() {
printf("Resized\n");
dataWidth = widgetSize.x - 60.0f;
waterfallHeight = widgetSize.y - fftHeight - 52;
delete[] latestFFT;
delete[] waterfallFb;
latestFFT = new float[dataWidth];
waterfallFb = new uint32_t[dataWidth * waterfallHeight];
for (int i = 0; i < dataWidth; i++) {
latestFFT[i] = -1000.0f; // Hide everything
}
updateWaterfallFb();
}
void WaterFall::draw() {
buf_mtx.lock();
window = GetCurrentWindow();
widgetPos = ImGui::GetWindowContentRegionMin();
widgetEndPos = ImGui::GetWindowContentRegionMax();
widgetPos.x += window->Pos.x;
widgetPos.y += window->Pos.y;
widgetEndPos.x += window->Pos.x;
widgetEndPos.y += window->Pos.y;
widgetSize = ImVec2(widgetEndPos.x - widgetPos.x, widgetEndPos.y - widgetPos.y);
if (widgetPos.x != lastWidgetPos.x || widgetPos.y != lastWidgetPos.y) {
lastWidgetPos = widgetPos;
onPositionChange();
}
if (widgetSize.x != lastWidgetSize.x || widgetSize.y != lastWidgetSize.y) {
lastWidgetSize = widgetSize;
onResize();
}
window->DrawList->AddRect(widgetPos, widgetEndPos, IM_COL32( 50, 50, 50, 255 ));
window->DrawList->AddLine(ImVec2(widgetPos.x, widgetPos.y + fftHeight + 50), ImVec2(widgetPos.x + widgetSize.x, widgetPos.y + fftHeight + 50), IM_COL32(50, 50, 50, 255), 1.0f);
drawFFT();
drawWaterfall();
buf_mtx.unlock();
}
void WaterFall::pushFFT(std::vector<float> data, int n) {
buf_mtx.lock();
fftBuffer.insert(fftBuffer.begin(), data);
newSamples = true;
fftDrawBuffer = NULL;
float offsetRatio = viewOffset / (wholeBandwidth / 2.0f);
int drawDataSize = (viewBandwidth / wholeBandwidth) * data.size();
int drawDataStart = (((float)data.size() / 2.0f) * (offsetRatio + 1)) - (drawDataSize / 2);
doZoom(drawDataStart, drawDataSize, dataWidth, data, latestFFT);
rawFFTs.insert(rawFFTs.begin(), data);
if (rawFFTs.size() > waterfallHeight + 300) {
rawFFTs.resize(waterfallHeight);
}
memcpy(&waterfallFb[dataWidth], waterfallFb, dataWidth * (waterfallHeight - 1) * sizeof(uint32_t));
float pixel;
float dataRange = waterfallMax - waterfallMin;
for (int j = 0; j < dataWidth; j++) {
pixel = (std::clamp<float>(latestFFT[j], waterfallMin, waterfallMax) - waterfallMin) / dataRange;
int id = (int)(pixel * (WATERFALL_RESOLUTION - 1));
waterfallFb[j] = waterfallPallet[(int)(pixel * (WATERFALL_RESOLUTION - 1))];
}
waterfallUpdate = true;
buf_mtx.unlock();
}
void WaterFall::updatePallette(float colors[][3], int colorCount) {
for (int i = 0; i < WATERFALL_RESOLUTION; i++) {
int lowerId = floorf(((float)i / (float)WATERFALL_RESOLUTION) * colorCount);
int upperId = ceilf(((float)i / (float)WATERFALL_RESOLUTION) * colorCount);
float ratio = (((float)i / (float)WATERFALL_RESOLUTION) * colorCount) - lowerId;
float r = (colors[lowerId][0] * (1.0f - ratio)) + (colors[upperId][0] * (ratio));
float g = (colors[lowerId][1] * (1.0f - ratio)) + (colors[upperId][1] * (ratio));
float b = (colors[lowerId][2] * (1.0f - ratio)) + (colors[upperId][2] * (ratio));
waterfallPallet[i] = ((uint32_t)255 << 24) | ((uint32_t)b << 16) | ((uint32_t)g << 8) | (uint32_t)r;
}
}
void WaterFall::autoRange() {
float min = INFINITY;
float max = -INFINITY;
for (int i = 0; i < dataWidth; i++) {
if (latestFFT[i] < min) {
min = latestFFT[i];
}
if (latestFFT[i] > max) {
max = latestFFT[i];
}
}
fftMin = min - 5;
fftMax = max + 5;
}
void WaterFall::setCenterFrequency(float freq) {
centerFreq = freq;
}
float WaterFall::getCenterFrequency() {
return centerFreq;
}
void WaterFall::setBandwidth(float bandWidth) {
float currentRatio = viewBandwidth / wholeBandwidth;
wholeBandwidth = bandWidth;
setViewBandwidth(bandWidth * currentRatio);
}
float WaterFall::getBandwidth() {
return wholeBandwidth;
}
void WaterFall::setVFOOffset(float offset) {
vfoOffset = offset;
}
float WaterFall::getVFOOfset() {
return vfoOffset;
}
void WaterFall::setVFOBandwidth(float bandwidth) {
vfoBandwidth = bandwidth;
}
float WaterFall::getVFOBandwidth() {
return vfoBandwidth;
}
void WaterFall::setViewBandwidth(float bandWidth) {
if (bandWidth == viewBandwidth) {
return;
}
if (abs(viewOffset) + (bandWidth / 2.0f) > wholeBandwidth / 2.0f) {
if (viewOffset < 0) {
viewOffset = (bandWidth / 2.0f) - (wholeBandwidth / 2.0f);
}
else {
viewOffset = (wholeBandwidth / 2.0f) - (bandWidth / 2.0f);
}
}
viewBandwidth = bandWidth;
lowerFreq = (centerFreq + viewOffset) - (viewBandwidth / 2.0f);
upperFreq = (centerFreq + viewOffset) + (viewBandwidth / 2.0f);
range = findBestFreqRange(bandWidth);
updateWaterfallFb();
}
void WaterFall::setViewOffset(float offset) {
if (offset == viewOffset) {
return;
}
if (abs(offset) + (viewBandwidth / 2.0f) > (wholeBandwidth / 2.0f)) {
return;
}
viewOffset = offset;
lowerFreq = (centerFreq + viewOffset) - (viewBandwidth / 2.0f);
upperFreq = (centerFreq + viewOffset) + (viewBandwidth / 2.0f);
updateWaterfallFb();
}
void WaterFall::setFFTMin(float min) {
fftMin = min;
}
float WaterFall::getFFTMin() {
return fftMin;
}
void WaterFall::setFFTMax(float max) {
fftMax = max;
}
float WaterFall::getFFTMax() {
return fftMax;
}
void WaterFall::setWaterfallMin(float min) {
if (min == waterfallMin) {
return;
}
waterfallMin = min;
updateWaterfallFb();
}
float WaterFall::getWaterfallMin() {
return waterfallMin;
}
void WaterFall::setWaterfallMax(float max) {
if (max == waterfallMax) {
return;
}
waterfallMax = max;
updateWaterfallFb();
}
float WaterFall::getWaterfallMax() {
return waterfallMax;
}
};