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#include "oscilloview.h"
#include <mmsystem.h>
#include <shellapi.h>
#include <windowsx.h>
enum {
TIMER_UPDATE = 1
};
struct oscilloview oscilloview_g = {
.flag = ATOMIC_FLAG_INIT
};
enum {
VIEW_SAMPLES = 1024,
VIEW_SKIP = 2,
};
static struct {
HINSTANCE hinst;
HWND parent;
HWND oscilloview;
ATOM oscilloview_class;
struct oscillodata oscillodata[LIBOPNA_OSCILLO_TRACK_COUNT];
UINT mmtimer;
HPEN whitepen;
void (*closecb)(void *ptr);
void *cbptr;
} g;
static void on_destroy(HWND hwnd) {
g.oscilloview = 0;
timeKillEvent(g.mmtimer);
DeleteObject(g.whitepen);
if (g.closecb) g.closecb(g.cbptr);
}
static void CALLBACK mmtimer_cb(UINT timerid, UINT msg,
DWORD_PTR userptr,
DWORD_PTR dw1, DWORD_PTR dw2) {
PostMessage(g.oscilloview, WM_USER, 0, 0);
}
static bool on_create(HWND hwnd, const CREATESTRUCT *cs) {
g.whitepen = CreatePen(PS_SOLID, 1, RGB(255, 255, 255));
ShowWindow(hwnd, SW_SHOW);
//SetTimer(hwnd, TIMER_UPDATE, 16, 0);
g.mmtimer = timeSetEvent(16, 16, mmtimer_cb, 0, TIME_PERIODIC);
DragAcceptFiles(hwnd, TRUE);
return true;
}
static void draw_track(HDC dc,
int x, int y, int w, int h,
const struct oscillodata *data) {
int start = OSCILLO_SAMPLE_COUNT - VIEW_SAMPLES;
start -= (data->offset >> OSCILLO_OFFSET_SHIFT);
if (start < 0) start = 0;
MoveToEx(dc, x, y + h/2.0 - (data->buf[start] / 16384.0) * h/2, 0);
for (int i = 0; i < (VIEW_SAMPLES / VIEW_SKIP); i++) {
LineTo(dc, (double)x + ((i)*w)/(VIEW_SAMPLES / VIEW_SKIP), y + h/2.0 - (data->buf[start + i*VIEW_SKIP] / 16384.0) * h/2);
}
}
static void on_paint(HWND hwnd) {
RECT cr;
GetClientRect(hwnd, &cr);
PAINTSTRUCT ps;
HDC dc = BeginPaint(hwnd, &ps);
HDC mdc = CreateCompatibleDC(dc);
HBITMAP bitmap = CreateCompatibleBitmap(dc, cr.right, cr.bottom);
SelectObject(mdc, bitmap);
FillRect(mdc, &cr, GetStockObject(BLACK_BRUSH));
SelectObject(mdc, g.whitepen);
int width = cr.right / 3;
int height = cr.bottom / 3;
for (int x = 0; x < 3; x++) {
for (int y = 0; y < 3; y++) {
draw_track(mdc, x*width, y*height, width, height, &g.oscillodata[x*3+y]);
}
}
BitBlt(dc, 0, 0, cr.right, cr.bottom, mdc, 0, 0, SRCCOPY);
SelectObject(mdc, 0);
DeleteObject(bitmap);
DeleteDC(mdc);
EndPaint(hwnd, &ps);
}
static LRESULT CALLBACK wndproc(
HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam
) {
switch (msg) {
HANDLE_MSG(hwnd, WM_DESTROY, on_destroy);
HANDLE_MSG(hwnd, WM_CREATE, on_create);
//HANDLE_MSG(hwnd, WM_TIMER, on_timer);
HANDLE_MSG(hwnd, WM_PAINT, on_paint);
case WM_ERASEBKGND:
return 1;
case WM_USER:
if (!atomic_flag_test_and_set_explicit(
&oscilloview_g.flag, memory_order_acquire)) {
memcpy(g.oscillodata,
oscilloview_g.oscillodata,
sizeof(oscilloview_g.oscillodata));
atomic_flag_clear_explicit(&oscilloview_g.flag, memory_order_release);
}
InvalidateRect(hwnd, 0, FALSE);
return 0;
case WM_DROPFILES:
return SendMessage(g.parent, msg, wParam, lParam);
}
return DefWindowProc(hwnd, msg, wParam, lParam);
}
void oscilloview_open(HINSTANCE hinst, HWND parent, void (*closecb)(void *ptr), void *cbptr) {
g.closecb = closecb;
g.cbptr = cbptr;
g.hinst = hinst;
g.parent = parent;
if (!g.oscilloview) {
if (!g.oscilloview_class) {
WNDCLASS wc = {0};
wc.style = 0;
wc.lpfnWndProc = wndproc;
wc.hInstance = g.hinst;
wc.hIcon = LoadIcon(g.hinst, MAKEINTRESOURCE(1));
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_BTNFACE+1);
wc.lpszClassName = L"myon_fmplayer_ym2608_oscilloviewer";
g.oscilloview_class = RegisterClass(&wc);
}
if (!g.oscilloview_class) {
MessageBox(parent, L"Cannot register oscilloviewer class", L"Error", MB_ICONSTOP);
return;
}
g.oscilloview = CreateWindowEx(0,
MAKEINTATOM(g.oscilloview_class),
L"FMPlayer Oscilloview",
WS_CAPTION | WS_SYSMENU | WS_CLIPCHILDREN | WS_SIZEBOX | WS_MAXIMIZEBOX,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
parent, 0, g.hinst, 0);
} else {
SetForegroundWindow(g.oscilloview);
}
}
void oscilloview_close(void) {
if (g.oscilloview) {
g.closecb = 0;
DestroyWindow(g.oscilloview);
}
}
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