markus/4k_synthwave
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uudet hexat integroitu teemun shaderiin

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Markus Järvisalo
2025-07-28 02:10:39 +03:00
parent 99af2bbf5c
commit e092075c8b
4 changed files with 331 additions and 218 deletions
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67
src/main.cpp
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@ -203,8 +203,13 @@ int __cdecl main(int argc, char* argv[])
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
const ULONGLONG targetIntervalMs = 1000 / 60; // For 60 FPS FFT updates
do
{
static ULONGLONG lastFFTTime = 0;
ULONGLONG currentTime = GetTickCount64();
direct_sound_buffer->GetCurrentPosition((DWORD*)&playCursor, NULL);
#if !(DESPERATE)
@ -235,42 +240,44 @@ int __cdecl main(int argc, char* argv[])
#endif
/******************
* FFT
*******************/
LPVOID audio_ptr = NULL;
DWORD audio_size = 0;
if (currentTime - lastFFTTime >= targetIntervalMs) {
lastFFTTime = currentTime;
/******************
* FFT
*******************/
LPVOID audio_ptr = NULL;
DWORD audio_size = 0;
// Read audio
HRESULT hr = IDirectSoundBuffer_Lock(direct_sound_buffer, 0, FFT_SIZE * sizeof(SUsample), &audio_ptr, &audio_size, NULL, NULL, DSBLOCK_FROMWRITECURSOR);
// Read audio
HRESULT hr = IDirectSoundBuffer_Lock(direct_sound_buffer, 0, FFT_SIZE * sizeof(SUsample), &audio_ptr, &audio_size, NULL, NULL, DSBLOCK_FROMWRITECURSOR);
if (SUCCEEDED(hr) && audio_ptr) {
if (playCursor < ((SU_LENGTH_IN_SAMPLES * SU_CHANNEL_COUNT * SU_SAMPLE_SIZE) - (FFT_SIZE* SU_CHANNEL_COUNT * SU_SAMPLE_SIZE)))
{
SUsample* samples = (SUsample*)audio_ptr;
for (int i = 0; i < FFT_SIZE; ++i) {
fft_input[i] = (float)samples[i];
if (SUCCEEDED(hr) && audio_ptr) {
if (playCursor < ((SU_LENGTH_IN_SAMPLES * SU_CHANNEL_COUNT * SU_SAMPLE_SIZE) - (FFT_SIZE * SU_CHANNEL_COUNT * SU_SAMPLE_SIZE)))
{
SUsample* samples = (SUsample*)audio_ptr;
for (int i = 0; i < FFT_SIZE; ++i) {
fft_input[i] = (float)samples[i];
}
}
IDirectSoundBuffer_Unlock(direct_sound_buffer, audio_ptr, audio_size, NULL, 0);
}
IDirectSoundBuffer_Unlock(direct_sound_buffer, audio_ptr, audio_size, NULL, 0);
// Calculate FFT
compute_fft(fft_input, fft_output);
// Normalize output
for (int i = 0; i < (FFT_SIZE / 4); i++)
{
float gain = 50.0f;
float alpha = 0.10f; // "Hidastaa" FFT:n piikkej<65>
float threshhold = 0.05f; // Alin arvo mik<69> p<><70>stet<65><74>n shaderille (v<>hent<6E><74> "noisea")
float x_t = fft_output[i] * gain;
// Exponential smoothing kaava
// s(t) = alpha*x(t)+(1-alpha)*s(t-1)
fft_uniform[i] = (x_t < threshhold) ? 0.f : alpha * (x_t)+(1 - alpha) * fft_uniform[i];
}
}
// Calculate FFT
compute_fft(fft_input, fft_output);
// Normalize output
for (int i = 0; i < (FFT_SIZE / 4); i++)
{
float gain = 50.0f;
float alpha = 0.15f; // "Hidastaa" FFT:n piikkej<65>
float threshhold = 0.05f; // Alin arvo mik<69> p<><70>stet<65><74>n shaderille (v<>hent<6E><74> "noisea")
float x_t = fft_output[i] * gain;
// Exponential smoothing kaava
// s(t) = alpha*x(t)+(1-alpha)*s(t-1)
fft_uniform[i] = (x_t < threshhold) ? 0.f : alpha*(x_t) + (1-alpha)*fft_uniform[i];
}
syncs[0] = (float)playCursor / (SU_SAMPLE_RATE * SU_CHANNEL_COUNT * SU_SAMPLE_SIZE); // Aika sekunteina.
for (int i = 0; i < SU_NUMSYNCS; ++i)