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spectrogram : add simple spectrogram tool (#17)

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This commit is contained in:
Georgi Gerganov
2021-02-09 21:25:47 +02:00
committed by GitHub
parent 9b3bcfb619
commit ea60fffd9e
4 changed files with 626 additions and 0 deletions
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1
examples/CMakeLists.txt
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@@ -91,4 +91,5 @@ if (GGWAVE_SUPPORT_SDL2)
endif() endif()
add_subdirectory(waver) add_subdirectory(waver)
add_subdirectory(spectrogram)
endif() endif()

16
examples/spectrogram/CMakeLists.txt Normal file
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@@ -0,0 +1,16 @@
set(TARGET spectrogram)
add_executable(${TARGET} main.cpp)
target_include_directories(${TARGET} PRIVATE
..
${SDL2_INCLUDE_DIRS}
)
target_link_libraries(${TARGET} PRIVATE
ggwave
ggwave-common
ggwave-common-sdl2
imgui-sdl2
${CMAKE_THREAD_LIBS_INIT}
)

91
examples/spectrogram/fft.h Normal file
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@@ -0,0 +1,91 @@
#pragma once
#include <cmath>
// FFT routines taken from https://stackoverflow.com/a/37729648/4039976
constexpr auto kMaxSamplesPerFrame = 1024;
int log2(int N) {
int k = N, i = 0;
while(k) {
k >>= 1;
i++;
}
return i - 1;
}
int reverse(int N, int n) {
int j, p = 0;
for(j = 1; j <= log2(N); j++) {
if(n & (1 << (log2(N) - j)))
p |= 1 << (j - 1);
}
return p;
}
void ordina(float * f1, int N) {
float f2[2*kMaxSamplesPerFrame];
for (int i = 0; i < N; i++) {
int ir = reverse(N, i);
f2[2*i + 0] = f1[2*ir + 0];
f2[2*i + 1] = f1[2*ir + 1];
}
for (int j = 0; j < N; j++) {
f1[2*j + 0] = f2[2*j + 0];
f1[2*j + 1] = f2[2*j + 1];
}
}
void transform(float * f, int N) {
ordina(f, N); //first: reverse order
float * W;
W = (float *)malloc(N*sizeof(float));
W[2*1 + 0] = cos(-2.*M_PI/N);
W[2*1 + 1] = sin(-2.*M_PI/N);
W[2*0 + 0] = 1;
W[2*0 + 1] = 0;
for (int i = 2; i < N / 2; i++) {
W[2*i + 0] = cos(-2.*i*M_PI/N);
W[2*i + 1] = sin(-2.*i*M_PI/N);
}
int n = 1;
int a = N / 2;
for(int j = 0; j < log2(N); j++) {
for(int i = 0; i < N; i++) {
if(!(i & n)) {
int wi = (i * a) % (n * a);
int fi = i + n;
float a = W[2*wi + 0];
float b = W[2*wi + 1];
float c = f[2*fi + 0];
float d = f[2*fi + 1];
float temp[2] = { f[2*i + 0], f[2*i + 1] };
float Temp[2] = { a*c - b*d, b*c + a*d };
f[2*i + 0] = temp[0] + Temp[0];
f[2*i + 1] = temp[1] + Temp[1];
f[2*fi + 0] = temp[0] - Temp[0];
f[2*fi + 1] = temp[1] - Temp[1];
}
}
n *= 2;
a = a / 2;
}
free(W);
}
void FFT(float * f, int N, float d) {
transform(f, N);
for (int i = 0; i < N; i++) {
f[2*i + 0] *= d;
f[2*i + 1] *= d;
}
}
void FFT(float * src, float * dst, int N, float d) {
for (int i = 0; i < N; ++i) {
dst[2*i + 0] = src[i];
dst[2*i + 1] = 0.0f;
}
FFT(dst, N, d);
}

518
examples/spectrogram/main.cpp Normal file
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@@ -0,0 +1,518 @@
#include "fft.h"
#include "ggwave/ggwave.h"
#include "ggwave-common.h"
#include <imgui-extra/imgui_impl.h>
#include <SDL.h>
#include <SDL_opengl.h>
#include <fstream>
#include <vector>
#include <functional>
namespace {
std::string g_defaultCaptureDeviceName = "";
SDL_AudioDeviceID g_devIdInp = 0;
SDL_AudioDeviceID g_devIdOut = 0;
SDL_AudioSpec g_obtainedSpecInp;
SDL_AudioSpec g_obtainedSpecOut;
struct FreqData {
float freq;
std::vector<float> mag;
};
bool g_isCapturing = true;
constexpr int g_nSamplesPerFrame = 1024;
int g_binMin = 40;
int g_binMax = 40 + 96;
bool g_showControls = true;
int g_freqDataHead = 0;
int g_freqDataSize = 0;
std::vector<FreqData> g_freqData;
}
void GGWave_setDefaultCaptureDeviceName(std::string name) {
g_defaultCaptureDeviceName = std::move(name);
}
bool GGWave_init(
const int playbackId,
const int captureId) {
if (g_devIdInp && g_devIdOut) {
return false;
}
if (g_devIdInp == 0 && g_devIdOut == 0) {
SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
if (SDL_Init(SDL_INIT_AUDIO) < 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
return (1);
}
SDL_SetHintWithPriority(SDL_HINT_AUDIO_RESAMPLING_MODE, "medium", SDL_HINT_OVERRIDE);
{
int nDevices = SDL_GetNumAudioDevices(SDL_FALSE);
printf("Found %d playback devices:\n", nDevices);
for (int i = 0; i < nDevices; i++) {
printf(" - Playback device #%d: '%s'\n", i, SDL_GetAudioDeviceName(i, SDL_FALSE));
}
}
{
int nDevices = SDL_GetNumAudioDevices(SDL_TRUE);
printf("Found %d capture devices:\n", nDevices);
for (int i = 0; i < nDevices; i++) {
printf(" - Capture device #%d: '%s'\n", i, SDL_GetAudioDeviceName(i, SDL_TRUE));
}
}
}
bool reinit = false;
if (g_devIdOut == 0) {
printf("Initializing playback ...\n");
SDL_AudioSpec playbackSpec;
SDL_zero(playbackSpec);
playbackSpec.freq = GGWave::kBaseSampleRate;
playbackSpec.format = AUDIO_S16SYS;
playbackSpec.channels = 1;
playbackSpec.samples = 16*1024;
playbackSpec.callback = NULL;
SDL_zero(g_obtainedSpecOut);
if (playbackId >= 0) {
printf("Attempt to open playback device %d : '%s' ...\n", playbackId, SDL_GetAudioDeviceName(playbackId, SDL_FALSE));
g_devIdOut = SDL_OpenAudioDevice(SDL_GetAudioDeviceName(playbackId, SDL_FALSE), SDL_FALSE, &playbackSpec, &g_obtainedSpecOut, 0);
} else {
printf("Attempt to open default playback device ...\n");
g_devIdOut = SDL_OpenAudioDevice(NULL, SDL_FALSE, &playbackSpec, &g_obtainedSpecOut, 0);
}
if (!g_devIdOut) {
printf("Couldn't open an audio device for playback: %s!\n", SDL_GetError());
g_devIdOut = 0;
} else {
printf("Obtained spec for output device (SDL Id = %d):\n", g_devIdOut);
printf(" - Sample rate: %d (required: %d)\n", g_obtainedSpecOut.freq, playbackSpec.freq);
printf(" - Format: %d (required: %d)\n", g_obtainedSpecOut.format, playbackSpec.format);
printf(" - Channels: %d (required: %d)\n", g_obtainedSpecOut.channels, playbackSpec.channels);
printf(" - Samples per frame: %d (required: %d)\n", g_obtainedSpecOut.samples, playbackSpec.samples);
if (g_obtainedSpecOut.format != playbackSpec.format ||
g_obtainedSpecOut.channels != playbackSpec.channels ||
g_obtainedSpecOut.samples != playbackSpec.samples) {
g_devIdOut = 0;
SDL_CloseAudio();
fprintf(stderr, "Failed to initialize playback SDL_OpenAudio!");
return false;
}
reinit = true;
}
}
if (g_devIdInp == 0) {
SDL_AudioSpec captureSpec;
captureSpec = g_obtainedSpecOut;
captureSpec.freq = GGWave::kBaseSampleRate;
captureSpec.format = AUDIO_F32SYS;
captureSpec.samples = g_nSamplesPerFrame;
SDL_zero(g_obtainedSpecInp);
if (captureId >= 0) {
printf("Attempt to open capture device %d : '%s' ...\n", captureId, SDL_GetAudioDeviceName(captureId, SDL_FALSE));
g_devIdInp = SDL_OpenAudioDevice(SDL_GetAudioDeviceName(captureId, SDL_TRUE), SDL_TRUE, &captureSpec, &g_obtainedSpecInp, 0);
} else {
printf("Attempt to open default capture device ...\n");
g_devIdInp = SDL_OpenAudioDevice(g_defaultCaptureDeviceName.empty() ? nullptr : g_defaultCaptureDeviceName.c_str(),
SDL_TRUE, &captureSpec, &g_obtainedSpecInp, 0);
}
if (!g_devIdInp) {
printf("Couldn't open an audio device for capture: %s!\n", SDL_GetError());
g_devIdInp = 0;
} else {
printf("Obtained spec for input device (SDL Id = %d):\n", g_devIdInp);
printf(" - Sample rate: %d\n", g_obtainedSpecInp.freq);
printf(" - Format: %d (required: %d)\n", g_obtainedSpecInp.format, captureSpec.format);
printf(" - Channels: %d (required: %d)\n", g_obtainedSpecInp.channels, captureSpec.channels);
printf(" - Samples per frame: %d\n", g_obtainedSpecInp.samples);
reinit = true;
}
}
GGWave::SampleFormat sampleFormatInp = GGWAVE_SAMPLE_FORMAT_UNDEFINED;
GGWave::SampleFormat sampleFormatOut = GGWAVE_SAMPLE_FORMAT_UNDEFINED;
switch (g_obtainedSpecInp.format) {
case AUDIO_U8: sampleFormatInp = GGWAVE_SAMPLE_FORMAT_U8; break;
case AUDIO_S8: sampleFormatInp = GGWAVE_SAMPLE_FORMAT_I8; break;
case AUDIO_U16SYS: sampleFormatInp = GGWAVE_SAMPLE_FORMAT_U16; break;
case AUDIO_S16SYS: sampleFormatInp = GGWAVE_SAMPLE_FORMAT_I16; break;
case AUDIO_S32SYS: sampleFormatInp = GGWAVE_SAMPLE_FORMAT_F32; break;
case AUDIO_F32SYS: sampleFormatInp = GGWAVE_SAMPLE_FORMAT_F32; break;
}
switch (g_obtainedSpecOut.format) {
case AUDIO_U8: sampleFormatOut = GGWAVE_SAMPLE_FORMAT_U8; break;
case AUDIO_S8: sampleFormatOut = GGWAVE_SAMPLE_FORMAT_I8; break;
case AUDIO_U16SYS: sampleFormatOut = GGWAVE_SAMPLE_FORMAT_U16; break;
case AUDIO_S16SYS: sampleFormatOut = GGWAVE_SAMPLE_FORMAT_I16; break;
case AUDIO_S32SYS: sampleFormatOut = GGWAVE_SAMPLE_FORMAT_F32; break;
case AUDIO_F32SYS: sampleFormatOut = GGWAVE_SAMPLE_FORMAT_F32; break;
break;
}
return true;
}
bool GGWave_mainLoop() {
if (g_devIdInp == 0 && g_devIdOut == 0) {
return false;
}
static GGWave::CBWaveformOut cbQueueAudio = [&](const void * data, uint32_t nBytes) {
SDL_QueueAudio(g_devIdOut, data, nBytes);
};
static GGWave::CBWaveformInp cbWaveformInp = [&](void * data, uint32_t nMaxBytes) {
return SDL_DequeueAudio(g_devIdInp, data, nMaxBytes);
};
SDL_PauseAudioDevice(g_devIdInp, SDL_FALSE);
if (!g_isCapturing) {
SDL_ClearQueuedAudio(g_devIdInp);
}
int n = 0;
static float data[g_nSamplesPerFrame];
static float out[2*g_nSamplesPerFrame];
do {
n = cbWaveformInp(data, sizeof(float)*g_nSamplesPerFrame);
if (n <= 0) break;
FFT(data, out, g_nSamplesPerFrame, 1.0);
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]);
}
for (int i = 1; i < g_nSamplesPerFrame/2; ++i) {
out[i] += out[g_nSamplesPerFrame - i];
}
for (int i = 0; i < (int) g_freqData.size(); ++i) {
g_freqData[i].mag[g_freqDataHead] = out[i];
}
if (++g_freqDataHead == g_freqDataSize) {
g_freqDataHead = 0;
}
} while (n > 0);
return true;
}
bool GGWave_deinit() {
if (g_devIdInp == 0 && g_devIdOut == 0) {
return false;
}
SDL_PauseAudioDevice(g_devIdInp, 1);
SDL_CloseAudioDevice(g_devIdInp);
SDL_PauseAudioDevice(g_devIdOut, 1);
SDL_CloseAudioDevice(g_devIdOut);
SDL_CloseAudio();
SDL_Quit();
return true;
}
bool ImGui_BeginFrame(SDL_Window * window) {
SDL_Event event;
while (SDL_PollEvent(&event))
{
ImGui_ProcessEvent(&event);
if (event.type == SDL_QUIT) return false;
if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_CLOSE && event.window.windowID == SDL_GetWindowID(window)) return false;
}
ImGui_NewFrame(window);
return true;
}
bool ImGui_EndFrame(SDL_Window * window) {
// Rendering
int display_w, display_h;
SDL_GetWindowSize(window, &display_w, &display_h);
glViewport(0, 0, display_w, display_h);
glClearColor(0.0f, 0.0f, 0.0f, 0.4f);
glClear(GL_COLOR_BUFFER_BIT);
ImGui::Render();
ImGui_RenderDrawData(ImGui::GetDrawData());
SDL_GL_SwapWindow(window);
return true;
}
bool ImGui_SetStyle() {
ImGuiStyle & style = ImGui::GetStyle();
style.AntiAliasedFill = true;
style.AntiAliasedLines = true;
style.WindowRounding = 0.0f;
style.WindowPadding = ImVec2(8, 8);
style.WindowRounding = 0.0f;
style.FramePadding = ImVec2(4, 3);
style.FrameRounding = 0.0f;
style.ItemSpacing = ImVec2(8, 4);
style.ItemInnerSpacing = ImVec2(4, 4);
style.IndentSpacing = 21.0f;
style.ScrollbarSize = 16.0f;
style.ScrollbarRounding = 9.0f;
style.GrabMinSize = 10.0f;
style.GrabRounding = 3.0f;
style.Colors[ImGuiCol_Text] = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
style.Colors[ImGuiCol_TextDisabled] = ImVec4(0.24f, 0.41f, 0.41f, 1.00f);
style.Colors[ImGuiCol_WindowBg] = ImVec4(0.08f, 0.08f, 0.08f, 0.94f);
//style.Colors[ImGuiCol_ChildWindowBg] = ImVec4(0.07f, 0.07f, 0.09f, 1.00f);
style.Colors[ImGuiCol_PopupBg] = ImVec4(0.07f, 0.07f, 0.09f, 1.00f);
style.Colors[ImGuiCol_Border] = ImVec4(0.31f, 0.31f, 0.31f, 0.71f);
style.Colors[ImGuiCol_BorderShadow] = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
style.Colors[ImGuiCol_FrameBg] = ImVec4(0.00f, 0.39f, 0.39f, 0.39f);
style.Colors[ImGuiCol_FrameBgHovered] = ImVec4(0.26f, 1.00f, 1.00f, 0.39f);
style.Colors[ImGuiCol_FrameBgActive] = ImVec4(0.00f, 0.78f, 0.00f, 1.00f);
style.Colors[ImGuiCol_TitleBg] = ImVec4(0.00f, 0.50f, 0.50f, 0.70f);
style.Colors[ImGuiCol_TitleBgCollapsed] = ImVec4(0.00f, 0.50f, 0.50f, 1.00f);
style.Colors[ImGuiCol_TitleBgActive] = ImVec4(0.00f, 0.70f, 0.70f, 1.00f);
style.Colors[ImGuiCol_MenuBarBg] = ImVec4(0.00f, 0.70f, 0.70f, 1.00f);
style.Colors[ImGuiCol_ScrollbarBg] = ImVec4(0.10f, 0.27f, 0.27f, 1.00f);
style.Colors[ImGuiCol_ScrollbarGrab] = ImVec4(0.80f, 0.80f, 0.83f, 0.31f);
style.Colors[ImGuiCol_ScrollbarGrabHovered] = ImVec4(0.26f, 1.00f, 1.00f, 0.39f);
style.Colors[ImGuiCol_ScrollbarGrabActive] = ImVec4(0.00f, 0.78f, 0.00f, 1.00f);
//style.Colors[ImGuiCol_ComboBg] = ImVec4(0.00f, 0.39f, 0.39f, 1.00f);
style.Colors[ImGuiCol_CheckMark] = ImVec4(0.80f, 0.80f, 0.83f, 0.39f);
style.Colors[ImGuiCol_SliderGrab] = ImVec4(0.80f, 0.80f, 0.83f, 0.39f);
style.Colors[ImGuiCol_SliderGrabActive] = ImVec4(0.00f, 0.78f, 0.00f, 1.00f);
style.Colors[ImGuiCol_Button] = ImVec4(0.13f, 0.55f, 0.55f, 1.00f);
style.Colors[ImGuiCol_ButtonHovered] = ImVec4(0.61f, 1.00f, 0.00f, 0.51f);
style.Colors[ImGuiCol_ButtonActive] = ImVec4(0.00f, 0.78f, 0.00f, 1.00f);
style.Colors[ImGuiCol_Header] = ImVec4(0.79f, 0.51f, 0.00f, 0.51f);
style.Colors[ImGuiCol_HeaderHovered] = ImVec4(0.79f, 0.51f, 0.00f, 0.67f);
style.Colors[ImGuiCol_HeaderActive] = ImVec4(0.79f, 0.51f, 0.00f, 0.67f);
//style.Colors[ImGuiCol_Column] = ImVec4(0.79f, 0.51f, 0.00f, 0.67f);
//style.Colors[ImGuiCol_ColumnHovered] = ImVec4(0.25f, 1.00f, 0.00f, 1.00f);
//style.Colors[ImGuiCol_ColumnActive] = ImVec4(0.79f, 0.51f, 0.00f, 0.67f);
style.Colors[ImGuiCol_ResizeGrip] = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
style.Colors[ImGuiCol_ResizeGripHovered] = ImVec4(0.26f, 1.00f, 1.00f, 0.39f);
style.Colors[ImGuiCol_ResizeGripActive] = ImVec4(0.00f, 0.78f, 0.00f, 1.00f);
//style.Colors[ImGuiCol_CloseButton] = ImVec4(0.40f, 0.39f, 0.38f, 0.16f);
//style.Colors[ImGuiCol_CloseButtonHovered] = ImVec4(0.26f, 1.00f, 1.00f, 0.39f);
//style.Colors[ImGuiCol_CloseButtonActive] = ImVec4(0.79f, 0.51f, 0.00f, 0.67f);
style.Colors[ImGuiCol_PlotLines] = ImVec4(1.00f, 0.65f, 0.38f, 0.67f);
style.Colors[ImGuiCol_PlotLinesHovered] = ImVec4(0.25f, 1.00f, 0.00f, 1.00f);
style.Colors[ImGuiCol_PlotHistogram] = ImVec4(1.00f, 0.65f, 0.38f, 0.67f);
style.Colors[ImGuiCol_PlotHistogramHovered] = ImVec4(0.25f, 1.00f, 0.00f, 1.00f);
style.Colors[ImGuiCol_TextSelectedBg] = ImVec4(0.25f, 1.00f, 0.00f, 0.43f);
style.Colors[ImGuiCol_ModalWindowDarkening] = ImVec4(1.00f, 0.98f, 0.95f, 0.78f);
return true;
}
static std::function<bool()> g_doInit;
static std::function<void(int, int)> g_setWindowSize;
static std::function<bool()> g_mainUpdate;
void mainUpdate(void *) {
g_mainUpdate();
}
int main(int argc, char** argv) {
auto argm = parseCmdArguments(argc, argv);
int captureId = argm["c"].empty() ? 0 : std::stoi(argm["c"]);
int playbackId = argm["p"].empty() ? 0 : std::stoi(argm["p"]);
if (SDL_Init(SDL_INIT_VIDEO) != 0) {
fprintf(stderr, "Error: %s\n", SDL_GetError());
return -1;
}
ImGui_PreInit();
int windowX = 1920;
int windowY = 1200;
const char * windowTitle = "spectrogram";
SDL_WindowFlags window_flags = (SDL_WindowFlags)(SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI);
SDL_Window * window = SDL_CreateWindow(windowTitle, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, windowX, windowY, window_flags);
void * gl_context = SDL_GL_CreateContext(window);
SDL_GL_MakeCurrent(window, gl_context);
SDL_GL_SetSwapInterval(1); // Enable vsync
ImGui_Init(window, gl_context);
ImGui::GetIO().IniFilename = nullptr;
ImGui_SetStyle();
ImGui_NewFrame(window);
ImGui::Render();
bool isInitialized = false;
g_doInit = [&]() {
if (GGWave_init(playbackId, captureId) == false) {
fprintf(stderr, "Failed to initialize GGWave\n");
return false;
}
g_freqDataSize = (3*GGWave::kBaseSampleRate)/g_nSamplesPerFrame;
float df = float(GGWave::kBaseSampleRate)/g_nSamplesPerFrame;
g_freqData.resize(g_nSamplesPerFrame/2);
for (int i = 0; i < g_nSamplesPerFrame/2; ++i) {
g_freqData[i].freq = df*i;
g_freqData[i].mag.resize(g_freqDataSize);
}
isInitialized = true;
return true;
};
g_setWindowSize = [&](int sizeX, int sizeY) {
SDL_SetWindowSize(window, sizeX, sizeY);
};
g_mainUpdate = [&]() {
if (isInitialized == false) {
return true;
}
if (ImGui_BeginFrame(window) == false) {
return false;
}
const auto& displaySize = ImGui::GetIO().DisplaySize;
ImGui::SetNextWindowPos({ 0, 0, });
ImGui::SetNextWindowSize(displaySize);
ImGui::Begin("Main", nullptr,
ImGuiWindowFlags_NoMove |
ImGuiWindowFlags_NoTitleBar |
ImGuiWindowFlags_NoScrollbar |
ImGuiWindowFlags_NoResize |
ImGuiWindowFlags_NoSavedSettings);
auto drawList = ImGui::GetWindowDrawList();
float sum = 0.0;
for (int i = g_binMin; i < g_binMax; ++i) {
for (int j = 0; j < g_freqDataSize; ++j) {
sum += g_freqData[i].mag[j];
}
}
int nf = g_binMax - g_binMin;
sum /= (nf*g_freqDataSize);
const float dx = displaySize.x/(g_freqDataSize + 1);
const float dy = displaySize.y/(nf + 1);
auto p0 = ImGui::GetCursorScreenPos();
for (int i = 0; i < nf; ++i) {
for (int j = 0; j < g_freqDataSize; ++j) {
int k = g_freqDataHead + j;
if (k >= g_freqDataSize) k -= g_freqDataSize;
auto v = g_freqData[g_binMin + i].mag[k];
ImVec4 c = { 0.0f, 1.0f, 0.0, 0.0f };
c.w = v/(5.0*sum);
drawList->AddRectFilled({ p0.x + j*dx, p0.y + i*dy }, { p0.x + j*dx + dx - 1, p0.y + i*dy + dy - 1 }, ImGui::ColorConvertFloat4ToU32(c));
}
}
//for (int i = 0; i < (int) g_freqData.size(); ++i) {
// ImGui::PushID(i);
// ImGui::PlotLines("##signal", g_freqData[i].mag.data(), g_freqData[i].mag.size(), g_freqData[i].head, std::to_string(g_freqData[i].freq).c_str(), 0.0f, FLT_MAX, { ImGui::GetContentRegionAvailWidth(), 20 });
// ImGui::PopID();
//}
ImGui::End();
bool togglePause = false;
if (g_showControls) {
ImGui::SetNextWindowFocus();
ImGui::SetNextWindowPos({ 20, 20 });
ImGui::SetNextWindowSize({ 400, 300 });
ImGui::Begin("Controls", &g_showControls);
ImGui::Text("Press 'c' to hide/show this window");
ImGui::DragInt("Min", &g_binMin, 1, 0, g_binMax - 1);
ImGui::DragInt("Max", &g_binMax, 1, g_binMin + 1, g_nSamplesPerFrame/2);
if (ImGui::Button("Pause")) {
togglePause = true;
}
if (ImGui::IsKeyPressed(40)) {
togglePause = true;
}
ImGui::End();
}
if (togglePause) {
g_isCapturing = !g_isCapturing;
}
if (ImGui::IsKeyPressed(6)) {
g_showControls = !g_showControls;
}
GGWave_mainLoop();
ImGui_EndFrame(window);
return true;
};
if (g_doInit() == false) {
printf("Error: failed to initialize audio\n");
return -2;
}
while (true) {
if (g_mainUpdate() == false) break;
}
GGWave_deinit();
// Cleanup
ImGui_Shutdown();
ImGui::DestroyContext();
SDL_GL_DeleteContext(gl_context);
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}