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spectrogram : remove old FFT algorithm

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Reuse the one embedded within ggwave through a static function
This commit is contained in:
Georgi Gerganov
2022-07-11 18:21:20 +03:00
parent 867eb1dfbb
commit d3d096ec2d
4 changed files with 41 additions and 96 deletions
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26
examples/spectrogram/main.cpp
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@@ -1,5 +1,3 @@
#include "fft.h"
#include "ggwave/ggwave.h"
#include "ggwave-common.h"
@@ -178,14 +176,34 @@ bool GGWave_mainLoop() {
SDL_ClearQueuedAudio(g_devIdInp);
}
int n = 0;
static bool isInitialzed = false;
static float data[g_nSamplesPerFrame];
static float out[2*g_nSamplesPerFrame];
static int workI[2*g_nSamplesPerFrame];
static float workF[g_nSamplesPerFrame/2];
if (!isInitialzed) {
memset(data, 0, sizeof(data));
memset(out, 0, sizeof(out));
memset(workI, 0, sizeof(workI));
memset(workF, 0, sizeof(workF));
isInitialzed = true;
}
int n = 0;
do {
n = SDL_DequeueAudio(g_devIdInp, data, sizeof(float)*g_nSamplesPerFrame);
if (n <= 0) break;
FFT(data, out, g_nSamplesPerFrame, 1.0);
if (GGWave::computeFFTR(data, out, g_nSamplesPerFrame, workI, workF) == false) {
fprintf(stderr, "Failed to compute FFT!\n");
return false;
}
for (int i = 0; i < g_nSamplesPerFrame; ++i) {
out[i] = std::sqrt(out[2*i + 0]*out[2*i + 0] + out[2*i + 1]*out[2*i + 1]);