mirror of
https://github.com/cjcliffe/CubicSDR.git
synced 2026-02-19 17:06:29 -05:00
a78a862cba
Preparing to make it more dynamic, able to tune multiple frequencies at once and support remaining demodulation modes (AM, USB, LSB)
250 lines
6.5 KiB
C++
250 lines
6.5 KiB
C++
#include "PrimaryGLContext.h"
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#include "wx/wxprec.h"
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#ifndef WX_PRECOMP
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#include "wx/wx.h"
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#endif
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#if !wxUSE_GLCANVAS
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#error "OpenGL required: set wxUSE_GLCANVAS to 1 and rebuild the library"
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#endif
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#include "CubicSDR.h"
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#include "CubicSDRDefs.h"
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#include "AppFrame.h"
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#include <algorithm>
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wxString glGetwxString(GLenum name) {
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const GLubyte *v = glGetString(name);
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if (v == 0) {
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// The error is not important. It is GL_INVALID_ENUM.
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// We just want to clear the error stack.
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glGetError();
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return wxString();
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}
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return wxString((const char*) v);
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}
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static void CheckGLError() {
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GLenum errLast = GL_NO_ERROR;
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for (;;) {
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GLenum err = glGetError();
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if (err == GL_NO_ERROR)
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return;
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if (err == errLast) {
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wxLogError
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(wxT("OpenGL error state couldn't be reset."));
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return;
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}
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errLast = err;
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wxLogError
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(wxT("OpenGL error %d"), err);
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}
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}
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PrimaryGLContext::PrimaryGLContext(wxGLCanvas *canvas) :
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wxGLContext(canvas) {
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SetCurrent(*canvas);
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glEnable(GL_CULL_FACE);
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glEnable(GL_DEPTH_TEST);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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CheckGLError();
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}
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void PrimaryGLContext::Plot(std::vector<float> &points, std::vector<float> &points2) {
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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// glEnable(GL_LINE_SMOOTH);
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if (points.size()) {
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glPushMatrix();
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glTranslatef(-1.0f, -0.9f, 0.0f);
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glScalef(2.0f, 1.0f, 1.0f);
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glEnableClientState(GL_VERTEX_ARRAY);
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glVertexPointer(2, GL_FLOAT, 0, &points[0]);
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glDrawArrays(GL_LINE_STRIP, 0, points.size() / 2);
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glDisableClientState(GL_VERTEX_ARRAY);
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glPopMatrix();
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}
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if (points2.size()) {
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glPushMatrix();
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glTranslatef(-1.0f, 0.5f, 0.0f);
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glScalef(2.0f, 1.0f, 1.0f);
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glEnableClientState(GL_VERTEX_ARRAY);
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glVertexPointer(2, GL_FLOAT, 0, &points2[0]);
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glDrawArrays(GL_LINE_STRIP, 0, points2.size() / 2);
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glDisableClientState(GL_VERTEX_ARRAY);
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glPopMatrix();
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}
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glFlush();
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CheckGLError();
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}
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wxBEGIN_EVENT_TABLE(TestGLCanvas, wxGLCanvas) EVT_PAINT(TestGLCanvas::OnPaint)
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EVT_KEY_DOWN(TestGLCanvas::OnKeyDown)
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EVT_IDLE(TestGLCanvas::OnIdle)
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wxEND_EVENT_TABLE()
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TestGLCanvas::TestGLCanvas(wxWindow *parent, int *attribList) :
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wxGLCanvas(parent, wxID_ANY, attribList, wxDefaultPosition, wxDefaultSize,
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wxFULL_REPAINT_ON_RESIZE), parent(parent) {
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int in_block_size = BUF_SIZE / 2;
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int out_block_size = FFT_SIZE;
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in = (fftw_complex*) fftw_malloc(sizeof(fftw_complex) * in_block_size);
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out[0] = (fftw_complex*) fftw_malloc(sizeof(fftw_complex) * out_block_size);
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out[1] = (fftw_complex*) fftw_malloc(sizeof(fftw_complex) * out_block_size);
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plan[0] = fftw_plan_dft_1d(out_block_size, in, out[0], FFTW_FORWARD, FFTW_MEASURE);
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plan[1] = fftw_plan_dft_1d(out_block_size, out[0], out[1], FFTW_BACKWARD, FFTW_MEASURE);
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fft_ceil_ma = fft_ceil_maa = 1.0;
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}
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TestGLCanvas::~TestGLCanvas() {
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}
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void TestGLCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
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wxPaintDC dc(this);
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const wxSize ClientSize = GetClientSize();
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PrimaryGLContext& canvas = wxGetApp().GetContext(this);
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glViewport(0, 0, ClientSize.x, ClientSize.y);
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std::vector<float> null_pts;
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canvas.Plot(spectrum_points, test_demod.waveform_points);
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SwapBuffers();
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}
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void TestGLCanvas::OnKeyDown(wxKeyEvent& event) {
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float angle = 5.0;
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unsigned int freq;
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switch (event.GetKeyCode()) {
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case WXK_RIGHT:
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freq = ((AppFrame*) parent)->getFrequency();
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freq += 100000;
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((AppFrame*) parent)->setFrequency(freq);
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break;
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case WXK_LEFT:
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freq = ((AppFrame*) parent)->getFrequency();
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freq -= 100000;
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((AppFrame*) parent)->setFrequency(freq);
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break;
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case WXK_DOWN:
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break;
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case WXK_UP:
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break;
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case WXK_SPACE:
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break;
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default:
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event.Skip();
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return;
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}
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}
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void multiply2(float ar, float aj, float br, float bj, float *cr, float *cj) {
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*cr = ar * br - aj * bj;
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*cj = aj * br + ar * bj;
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}
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float polar_discriminant2(float ar, float aj, float br, float bj) {
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float cr, cj;
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double angle;
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multiply2(ar, aj, br, -bj, &cr, &cj);
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angle = atan2(cj, cr);
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return (angle / M_PI);
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}
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void TestGLCanvas::setData(std::vector<signed char> *data) {
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if (data && data->size()) {
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if (spectrum_points.size() < FFT_SIZE * 2) {
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spectrum_points.resize(FFT_SIZE * 2);
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}
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for (int i = 0; i < BUF_SIZE / 2; i++) {
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in[i][0] = (float) (*data)[i * 2] / 127.0f;
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in[i][1] = (float) (*data)[i * 2 + 1] / 127.0f;
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}
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fftw_execute(plan[0]);
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double fft_ceil = 0;
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if (fft_result.size() < FFT_SIZE) {
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fft_result.resize(FFT_SIZE);
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fft_result_ma.resize(FFT_SIZE);
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fft_result_maa.resize(FFT_SIZE);
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}
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for (int j = 0; j < 2; j++) {
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for (int i = 0, iMax = FFT_SIZE / 2; i < iMax; i++) {
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double a = out[0][i][0];
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double b = out[0][i][1];
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double c = sqrt(a * a + b * b);
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double x = out[0][FFT_SIZE / 2 + i][0];
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double y = out[0][FFT_SIZE / 2 + i][1];
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double z = sqrt(x * x + y * y);
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fft_result[i] = (z);
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fft_result[FFT_SIZE / 2 + i] = (c);
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}
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}
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float time_slice = (float) SRATE / (float) (BUF_SIZE / 2);
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for (int i = 0, iMax = FFT_SIZE; i < iMax; i++) {
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fft_result_maa[i] += (fft_result_ma[i] - fft_result_maa[i]) * 0.65;
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fft_result_ma[i] += (fft_result[i] - fft_result_ma[i]) * 0.65;
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if (fft_result_maa[i] > fft_ceil) {
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fft_ceil = fft_result_maa[i];
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}
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}
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fft_ceil_ma = fft_ceil_ma + (fft_ceil - fft_ceil_ma) * 0.05;
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fft_ceil_maa = fft_ceil_maa + (fft_ceil - fft_ceil_maa) * 0.05;
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// fftw_execute(plan[1]);
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for (int i = 0, iMax = FFT_SIZE; i < iMax; i++) {
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spectrum_points[i * 2 + 1] = log10(fft_result_maa[i]) / log10(fft_ceil_maa);
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// spectrum_points[i * 2 + 1] = (fft_result_maa[i]) / (fft_ceil_maa);
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spectrum_points[i * 2] = ((double) i / (double) iMax);
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}
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test_demod.writeBuffer(data);
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}
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}
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void TestGLCanvas::OnIdle(wxIdleEvent &event) {
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Refresh(false);
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}
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