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Waterfall tweaking, automatic range adjustment

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This commit is contained in:
Charles J. Cliffe 2014-11-12 00:28:20 -05:00
parent 810533750f
commit adc6fcce85
3 changed files with 18 additions and 17 deletions
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2
src/Demodulator.cpp
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@ -85,7 +85,7 @@ Demodulator::Demodulator() {
stream = NULL;
err = Pa_OpenStream(&stream, NULL, &outputParameters, audio_frequency, 256, paClipOff, &patestCallback, this);
err = Pa_OpenStream(&stream, NULL, &outputParameters, audio_frequency, 1024, paClipOff, &patestCallback, this);
err = Pa_StartStream(stream);
if (err != paNoError) {

32
src/PrimaryGLContext.cpp
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@ -64,8 +64,7 @@ PrimaryGLContext::PrimaryGLContext(wxGLCanvas *canvas) :
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, waterfall);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
// glTexImage2D(GL_TEXTURE_2D,0,GL_INTENSITY,FFT_SIZE,NUM_WATERFALL_LINES,0,GL_COLOR_INDEX,GL_UNSIGNED_BYTE,(GLvoid *)waterfall_tex);
float clr[16] = { 255, 0, 0, 0, 255, 0, 0, 0, 255, 255, 255, 255 };
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
@ -73,7 +72,6 @@ PrimaryGLContext::PrimaryGLContext(wxGLCanvas *canvas) :
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
grad.addColor(GradientColor(0, 0, 0));
grad.addColor(GradientColor(0, 0, 1.0));
grad.addColor(GradientColor(0, 1.0, 0));
@ -81,11 +79,6 @@ PrimaryGLContext::PrimaryGLContext(wxGLCanvas *canvas) :
grad.addColor(GradientColor(1.0, 0.2, 0.0));
grad.generate(256);
// glTexImage2D(GL_TEXTURE_2D,0,GL_INTENSITY,FFT_SIZE,NUM_WATERFALL_LINES,0,GL_COLOR_INDEX,GL_UNSIGNED_BYTE,(GLvoid *)waterfall_tex);
unsigned char rmap[256];
unsigned char gmap[256];
unsigned char bmap[256];
glPixelTransferi(GL_MAP_COLOR, GL_TRUE);
glPixelMapfv(GL_PIXEL_MAP_I_TO_R, 256, &(grad.getRed())[0]);
@ -115,9 +108,7 @@ void PrimaryGLContext::Plot(std::vector<float> &points, std::vector<float> &poin
}
glBindTexture(GL_TEXTURE_2D, waterfall);
// glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, FFT_SIZE, NUM_WATERFALL_LINES, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, waterfall_tex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, FFT_SIZE, NUM_WATERFALL_LINES, 0, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, (GLvoid *) waterfall_tex);
// glEnable(GL_LINE_SMOOTH);
glDisable(GL_TEXTURE_2D);
@ -183,8 +174,8 @@ TestGLCanvas::TestGLCanvas(wxWindow *parent, int *attribList) :
plan[0] = fftw_plan_dft_1d(out_block_size, in, out[0], FFTW_FORWARD, FFTW_MEASURE);
plan[1] = fftw_plan_dft_1d(out_block_size, out[0], out[1], FFTW_BACKWARD, FFTW_MEASURE);
fft_ceil_ma = fft_ceil_maa = 1.0;
fft_ceil_ma = fft_ceil_maa = 100.0;
fft_floor_ma = fft_floor_maa = 0.0;
}
TestGLCanvas::~TestGLCanvas() {
@ -256,7 +247,7 @@ void TestGLCanvas::setData(std::vector<signed char> *data) {
fftw_execute(plan[0]);
double fft_ceil = 0;
double fft_ceil = 0, fft_floor=1;
if (fft_result.size() < FFT_SIZE) {
fft_result.resize(FFT_SIZE);
@ -288,15 +279,24 @@ void TestGLCanvas::setData(std::vector<signed char> *data) {
if (fft_result_maa[i] > fft_ceil) {
fft_ceil = fft_result_maa[i];
}
if (fft_result_maa[i] < fft_floor) {
fft_floor = fft_result_maa[i];
}
}
fft_ceil_ma = fft_ceil_ma + (fft_ceil - fft_ceil_ma) * 0.05;
fft_ceil_maa = fft_ceil_maa + (fft_ceil - fft_ceil_maa) * 0.05;
fft_ceil += 1;
fft_floor -= 1;
fft_ceil_ma = fft_ceil_ma + (fft_ceil - fft_ceil_ma) * 0.01;
fft_ceil_maa = fft_ceil_maa + (fft_ceil_ma - fft_ceil_maa) * 0.01;
fft_floor_ma = fft_floor_ma + (fft_floor - fft_floor_ma) * 0.01;
fft_floor_maa = fft_floor_maa + (fft_floor_ma - fft_floor_maa) * 0.01;
// fftw_execute(plan[1]);
for (int i = 0, iMax = FFT_SIZE; i < iMax; i++) {
float v = log10(fft_result_maa[i]) / log10(fft_ceil_maa);
float v = (log10(fft_result_maa[i]-fft_floor_maa) / log10(fft_ceil_maa-fft_floor_maa));
spectrum_points[i * 2] = ((float) i / (float) iMax);
spectrum_points[i * 2 + 1] = v;
}

1
src/PrimaryGLContext.h
View File

@ -48,6 +48,7 @@ private:
fftw_plan plan[2];
float fft_ceil_ma, fft_ceil_maa;
float fft_floor_ma, fft_floor_maa;
std::vector<float> fft_result;
std::vector<float> fft_result_ma;