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Now plotting spectrum and demodulated FM

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This commit is contained in:
Charles J. Cliffe 2014-11-05 18:12:42 -05:00
parent 39afec2172
commit d91cffbe58
2 changed files with 43 additions and 29 deletions
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67
src/PrimaryGLContext.cpp
View File

@ -63,7 +63,7 @@ PrimaryGLContext::PrimaryGLContext(wxGLCanvas *canvas) :
CheckGLError();
}
void PrimaryGLContext::Plot(std::vector<float> &points) {
void PrimaryGLContext::Plot(std::vector<float> &points,std::vector<float> &points2) {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
@ -71,22 +71,27 @@ void PrimaryGLContext::Plot(std::vector<float> &points) {
// glEnable(GL_LINE_SMOOTH);
glPushMatrix();
glTranslatef(-1.0f, -0.9f, 0.0f);
glScalef(2.0f, 1.8f, 1.0f);
if (points.size()) {
glPushMatrix();
glTranslatef(-1.0f, -0.9f, 0.0f);
glScalef(2.0f, 1.0f, 1.0f);
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(2, GL_FLOAT, 0, &points[0]);
glDrawArrays(GL_LINE_STRIP, 0, points.size() / 2);
glDisableClientState(GL_VERTEX_ARRAY);
} else {
glBegin(GL_LINE_STRIP);
glColor3f(1.0f, 1.0f, 1.0f);
glVertex3f(-1.0f, 0.0f, 0.0f);
glVertex3f(1.0f, 0.0f, 0.0f);
glEnd();
glPopMatrix();
}
if (points2.size()) {
glPushMatrix();
glTranslatef(-1.0f, 0.5f, 0.0f);
glScalef(2.0f, 0.5f, 1.0f);
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(2, GL_FLOAT, 0, &points2[0]);
glDrawArrays(GL_LINE_STRIP, 0, points2.size() / 2);
glDisableClientState(GL_VERTEX_ARRAY);
glPopMatrix();
}
glPopMatrix();
glFlush();
@ -121,7 +126,7 @@ void TestGLCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
PrimaryGLContext& canvas = wxGetApp().GetContext(this);
glViewport(0, 0, ClientSize.x, ClientSize.y);
canvas.Plot(points);
canvas.Plot(spectrum_points,waveform_points);
SwapBuffers();
}
@ -157,23 +162,31 @@ void TestGLCanvas::setData(std::vector<signed char> *data) {
if (data && data->size()) {
std::vector<int16_t> tmp(data->begin(),data->end());
std::vector<int16_t> tmp(data->begin(), data->end());
demod.demod(tmp);
std::cout << demod.lp_len << std::endl;
// std::cout << demod.lp_len << std::endl;
if (points.size() < demod.lp_len*2) {
points.resize(demod.lp_len*2);
}
for (int i = 0, iMax= demod.lp_len; i < iMax; i++) {
points[i * 2 + 1] = (float)demod.lowpassed[i]/32767.0+0.5;
points[i * 2] = ((double) i / (double) iMax);
if (waveform_points.size() < demod.lp_len * 2) {
waveform_points.resize(demod.lp_len * 2);
}
/*
if (points.size() < FFT_SIZE * 2) {
points.resize(FFT_SIZE * 2);
float waveform_ceil = 0;
for (int i = 0, iMax = demod.lp_len; i < iMax; i++) {
float v = fabs(demod.lowpassed[i]);
if (v>waveform_ceil) {
waveform_ceil = v;
}
}
for (int i = 0, iMax = demod.lp_len; i < iMax; i++) {
waveform_points[i * 2 + 1] = (float) demod.lowpassed[i] / waveform_ceil;
waveform_points[i * 2] = ((double) i / (double) iMax);
}
if (spectrum_points.size() < FFT_SIZE * 2) {
spectrum_points.resize(FFT_SIZE * 2);
}
for (int i = 0; i < BUF_SIZE / 2; i++) {
@ -228,9 +241,9 @@ void TestGLCanvas::setData(std::vector<signed char> *data) {
fft_ceil_maa = fft_ceil_maa + (fft_ceil - fft_ceil_maa) * 0.05;
for (int i = 0, iMax = FFT_SIZE; i < iMax; i++) {
points[i * 2 + 1] = fft_result_maa[i] / fft_ceil_maa;
points[i * 2] = ((double) i / (double) iMax);
}*/
spectrum_points[i * 2 + 1] = fft_result_maa[i] / fft_ceil_maa;
spectrum_points[i * 2] = ((double) i / (double) iMax);
}
}
}

5
src/PrimaryGLContext.h
View File

@ -13,7 +13,7 @@ class PrimaryGLContext: public wxGLContext {
public:
PrimaryGLContext(wxGLCanvas *canvas);
void Plot(std::vector<float> &points);
void Plot(std::vector<float> &points,std::vector<float> &points2);
private:
// textures for the cube faces
@ -33,7 +33,8 @@ private:
void OnIdle(wxIdleEvent &event);
wxWindow *parent;
std::vector<float> points;
std::vector<float> spectrum_points;
std::vector<float> waveform_points;
fftw_complex *in, *out[2];
fftw_plan plan[2];