Wav 无缝循环播放器及实现代码

#include <Windows.h> #include <commdlg.h> #include <stdio.h> #include "resource.h" #define WM_STOP (WM_USER+2) HWND hLog; void ClearLogBox() { SetWindowTextW(hLog, L""); } void AddLogBox(LPCWSTR lpStr) { DWORD Len = lstrlenW(lpStr); DWORD Size = Len + GetWindowTextLengthW(hLog) + 1; LPWSTR lpNewStr = (LPWSTR)malloc(Size * sizeof(WCHAR)); GetWindowTextW(hLog, lpNewStr, Size); lstrcatW(lpNewStr, lpStr); SetWindowTextW(hLog, lpNewStr); free(lpNewStr); } BOOL HaveName; WCHAR FileName[MAX_PATH], FileTitle[MAX_PATH]; void LoadFile(HWND hDlg) { OPENFILENAMEW ofn; ZeroMemory(&ofn, sizeof(ofn)); ofn.lStructSize = sizeof(ofn); ofn.hwndOwner = hDlg; ofn.lpstrFilter = L"Wave Files (*.WAV)\0*.wav\0\0"; ofn.lpstrFile = FileName; ofn.nMaxFile = MAX_PATH; ofn.lpstrFileTitle = FileTitle; ofn.nMaxFileTitle = MAX_PATH; ofn.lpstrDefExt = L"wav"; if (GetOpenFileNameW(&ofn)) { AddLogBox(L"Get File \""); AddLogBox(FileTitle); AddLogBox(L"\"\r\n"); HaveName = TRUE; } } DWORD GetEditNumber(HWND hEdit) { DWORD Size = GetWindowTextLengthW(hEdit) + 1; if (Size == 1) { return -1; } LPWSTR lpBuffer = (LPWSTR)malloc(Size * sizeof(WCHAR)); GetWindowText(hEdit, lpBuffer, Size); DWORD Ans; swscanf_s(lpBuffer, L"%u", &Ans); free(lpBuffer); return Ans; } BOOL Readed; WAVEFORMATEX WaveFormat; BYTE* Buffer; BOOL ReadWave() { if (Readed) { free(Buffer); Buffer = NULL; Readed = FALSE; } HANDLE hFile = CreateFileW(FileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL); if (hFile == INVALID_HANDLE_VALUE) { AddLogBox(L"Open File Failed\r\n"); return FALSE; } DWORD Read = 0, Flag; if (!ReadFile(hFile, &Flag, 4, &Read, NULL) || Read != 4) { AddLogBox(L"Read File Failed\r\n"); CloseHandle(hFile); return FALSE; } if (memcmp(&Flag, "RIFF", 4)) { AddLogBox(L"File Format Mismatch1\r\n"); CloseHandle(hFile); return FALSE; } if (!ReadFile(hFile, &Flag, 4, &Read, NULL) || Read != 4) { AddLogBox(L"Read File Failed\r\n"); CloseHandle(hFile); return FALSE; } DWORD t = GetFileSize(hFile, NULL); if (Flag + 8 != GetFileSize(hFile, NULL)) { AddLogBox(L"File Format Mismatch2\r\n"); CloseHandle(hFile); return FALSE; } if (!ReadFile(hFile, &Flag, 4, &Read, NULL) || Read != 4) { AddLogBox(L"Read File Failed\r\n"); CloseHandle(hFile); return FALSE; } if (memcmp(&Flag, "WAVE", 4)) { AddLogBox(L"File Format Mismatch3\r\n"); CloseHandle(hFile); return FALSE; } if (!ReadFile(hFile, &Flag, 4, &Read, NULL) || Read != 4) { AddLogBox(L"Read File Failed\r\n"); CloseHandle(hFile); return FALSE; } if (memcmp(&Flag, "fmt ", 4)) { AddLogBox(L"File Format Mismatch4\r\n"); CloseHandle(hFile); return FALSE; } if (!ReadFile(hFile, &Flag, 4, &Read, NULL) || Read != 4) { AddLogBox(L"Read File Failed\r\n"); CloseHandle(hFile); return FALSE; } if (Flag != sizeof(WaveFormat)) { if (Flag == sizeof(PCMWAVEFORMAT)) { PCMWAVEFORMAT pwm; if (!ReadFile(hFile, &pwm, sizeof(pwm), &Read, NULL) || Read != sizeof(pwm)) { AddLogBox(L"Read File Failed\r\n"); CloseHandle(hFile); return FALSE; } memcpy(&WaveFormat, &pwm, sizeof(pwm)); WaveFormat.cbSize = 0; } else { AddLogBox(L"File Format Mismatch5\r\n"); CloseHandle(hFile); return FALSE; } } else { if (!ReadFile(hFile, &WaveFormat, sizeof(WaveFormat), &Read, NULL) || Read != sizeof(WaveFormat)) { AddLogBox(L"Read File Failed\r\n"); CloseHandle(hFile); return FALSE; } } if (WaveFormat.wFormatTag != 1) { AddLogBox(L"File Format Mismatch6\r\n"); CloseHandle(hFile); return FALSE; } if (!ReadFile(hFile, &Flag, 4, &Read, NULL) || Read != 4) { AddLogBox(L"Read File Failed\r\n"); CloseHandle(hFile); return FALSE; } if (memcmp(&Flag, "data", 4)) { AddLogBox(L"File Format Mismatch7\r\n"); CloseHandle(hFile); return FALSE; } if (!ReadFile(hFile, &Flag, 4, &Read, NULL) || Read != 4) { AddLogBox(L"Read File Failed\r\n"); CloseHandle(hFile); return FALSE; } Buffer = (BYTE*)malloc(Flag); if (!Buffer) { AddLogBox(L"Memory Allocate Fail\r\n"); CloseHandle(hFile); return FALSE; } if (!ReadFile(hFile, Buffer, Flag, &Read, NULL) || Read != Flag) { AddLogBox(L"Read File Failed\r\n"); free(Buffer); CloseHandle(hFile); return FALSE; } AddLogBox(L"Success!\r\n"); CloseHandle(hFile); Readed = TRUE; return TRUE; } HWAVEOUT hWaveOut; BOOL Play; WAVEHDR Header1, Header2, Header3; BYTE* EnterBuffer; BYTE* LoopBuffer; CONST LPARAM pHeader1 = (LPARAM)&Header1; CONST LPARAM pHeader2 = (LPARAM)&Header2; CONST LPARAM pHeader3 = (LPARAM)&Header3; void PlayWave(HWND hDlg, DWORD StartLoop, DWORD EndLoop) { WORD bps = WaveFormat.wBitsPerSample*WaveFormat.nChannels / 8; EnterBuffer = Buffer; LoopBuffer = Buffer + StartLoop*bps; if (MMSYSERR_NOERROR != waveOutOpen(&hWaveOut, WAVE_MAPPER, &WaveFormat, (DWORD)hDlg, 0, CALLBACK_WINDOW)) { AddLogBox(L"Open Waveout Device Fail\r\n"); return; } Header1.lpData = (LPSTR)EnterBuffer; Header1.dwBufferLength = StartLoop*bps; Header1.dwLoops = 1; waveOutPrepareHeader(hWaveOut, &Header1, sizeof(WAVEHDR)); Header2.lpData = (LPSTR)LoopBuffer; Header2.dwBufferLength = (EndLoop-StartLoop)*bps; Header2.dwLoops = 1; waveOutPrepareHeader(hWaveOut, &Header2, sizeof(WAVEHDR)); Header3.lpData = (LPSTR)LoopBuffer; Header3.dwBufferLength = (EndLoop - StartLoop)*bps; Header3.dwLoops = 1; waveOutPrepareHeader(hWaveOut, &Header3, sizeof(WAVEHDR)); Play = TRUE; } void ReleaseWave() { Play = FALSE; waveOutReset(hWaveOut); } BOOL CALLBACK MainProc(HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam) { switch (uMsg) { case WM_INITDIALOG: hLog = GetDlgItem(hDlg, IDC_EDIT_LOG); EnableWindow(GetDlgItem(hDlg, IDC_BUTTON_PLAY), FALSE); return TRUE; case WM_COMMAND: switch (LOWORD(wParam)) { case IDC_BUTTON_OPEN: LoadFile(hDlg); EnableWindow(GetDlgItem(hDlg, IDC_BUTTON_PLAY), HaveName); return TRUE; case IDC_BUTTON_PLAY: if (!Play) { if (!ReadWave()) { return TRUE; } EnableWindow(GetDlgItem(hDlg, IDC_BUTTON_OPEN), FALSE); PlayWave(hDlg, GetEditNumber(GetDlgItem(hDlg, IDC_EDIT_START)), GetEditNumber(GetDlgItem(hDlg, IDC_EDIT_END))); } else { SendMessageW(hDlg, WM_STOP, 0, 0); } return TRUE; case IDC_BUTTON_CLEAR: ClearLogBox(); return TRUE; case IDC_BUTTON_EXIT: case IDCANCEL: if (Play) { SendMessageW(hDlg, WM_STOP, 0, 0); } if (HaveName) { free(Buffer); } EndDialog(hDlg, 0); return TRUE; } return FALSE; case WM_STOP: EnableWindow(GetDlgItem(hDlg, IDC_BUTTON_OPEN), TRUE); ReleaseWave(); return TRUE; case MM_WOM_OPEN: SetWindowTextW(GetDlgItem(hDlg, IDC_BUTTON_PLAY), L"Stop"); waveOutWrite(hWaveOut, &Header1, sizeof(Header1)); waveOutWrite(hWaveOut, &Header2, sizeof(Header2)); waveOutWrite(hWaveOut, &Header3, sizeof(Header3)); return TRUE; case MM_WOM_DONE: if (!Play) { waveOutClose(hWaveOut); return TRUE; } if (lParam == pHeader1) { AddLogBox(L"Start Loop\r\n"); return TRUE; } AddLogBox(L"Loop\r\n"); waveOutWrite(hWaveOut, (PWAVEHDR)lParam, sizeof(WAVEHDR)); return TRUE; case MM_WOM_CLOSE: waveOutUnprepareHeader(hWaveOut, &Header1, sizeof(WAVEHDR)); waveOutUnprepareHeader(hWaveOut, &Header2, sizeof(WAVEHDR)); waveOutUnprepareHeader(hWaveOut, &Header3, sizeof(WAVEHDR)); SetWindowTextW(GetDlgItem(hDlg, IDC_BUTTON_PLAY), L"Play"); return TRUE; } return FALSE; } int APIENTRY wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInst, LPWSTR lpCmdLine, int nShowCmd) { return DialogBoxW(hInstance, MAKEINTRESOURCEW(IDD_MAIN), NULL, MainProc); }