示波器频谱分析 VC++.rar_VC 波_VC示波器_vc实现示波器_vc频谱分析_示波器

// Audio Scope Written By Steven De Toni #include <stdio.h> #include <stdarg.h> #include <windows.h> #include <commctrl.h> #include <mmsystem.h> #include "FFTransform.h" #include "resource.h" // --- Global Variables --- HINSTANCE HInst = NULL; void OutputDebugMsg (const char* pszFormat, ...) { char buf[1024]; va_list arglist; va_start(arglist, pszFormat); vsprintf(buf, pszFormat, arglist); va_end(arglist); strcat(buf, "\n"); OutputDebugString(buf); } void OutputMsgBox (const char* pszFormat, ...) { char buf[1024]; va_list arglist; va_start(arglist, pszFormat); vsprintf(buf, pszFormat, arglist); va_end(arglist); strcat(buf, "\n"); MessageBox (NULL, buf, "", MB_ICONSTOP); } /*********************** PrintWaveErrorMsg() ************************** * Retrieves and displays an error message for the passed Wave In error * number. It does this using mciGetErrorString(). *************************************************************************/ void PrintWaveErrorMsg(DWORD err, TCHAR * str) { char buffer[128]; OutputMsgBox ("ERROR 0x%08X: %s\r\n", err, str); if (mciGetErrorString(err, &buffer[0], sizeof(buffer))) { OutputMsgBox ("%s\r\n", &buffer[0]); } else { OutputMsgBox ("0x%08X returned!\r\n", err); } } /* What a long winded way to select recording input! MIXERLINE_COMPONENTTYPE_SRC_ANALOG MIXERLINE_COMPONENTTYPE_SRC_AUXILIARY MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC MIXERLINE_COMPONENTTYPE_SRC_DIGITAL MIXERLINE_COMPONENTTYPE_SRC_LINE MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE MIXERLINE_COMPONENTTYPE_SRC_PCSPEAKER MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER MIXERLINE_COMPONENTTYPE_SRC_TELEPHONE MIXERLINE_COMPONENTTYPE_SRC_UNDEFINED MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT */ BOOL SetInputDevice (unsigned int inDev) { HMIXER hMixer = NULL; int inDevIdx = -1; if (mixerOpen(&hMixer, 0, 0, NULL, MIXER_OBJECTF_MIXER) != MMSYSERR_NOERROR) { return FALSE; } // get dwLineID MIXERLINE mxl; mxl.cbStruct = sizeof(MIXERLINE); mxl.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_WAVEIN; if (mixerGetLineInfo((HMIXEROBJ)hMixer, &mxl, MIXER_OBJECTF_HMIXER | MIXER_GETLINEINFOF_COMPONENTTYPE) != MMSYSERR_NOERROR) { mixerClose (hMixer); return FALSE; } // get dwControlID MIXERCONTROL mxc; MIXERLINECONTROLS mxlc; DWORD dwControlType = MIXERCONTROL_CONTROLTYPE_MIXER; mxlc.cbStruct = sizeof(MIXERLINECONTROLS); mxlc.dwLineID = mxl.dwLineID; mxlc.dwControlType = dwControlType; mxlc.cControls = 0; mxlc.cbmxctrl = sizeof(MIXERCONTROL); mxlc.pamxctrl = &mxc; if (mixerGetLineControls((HMIXEROBJ)hMixer, &mxlc, MIXER_OBJECTF_HMIXER | MIXER_GETLINECONTROLSF_ONEBYTYPE) != MMSYSERR_NOERROR) { // no mixer, try MUX dwControlType = MIXERCONTROL_CONTROLTYPE_MUX; mxlc.cbStruct = sizeof(MIXERLINECONTROLS); mxlc.dwLineID = mxl.dwLineID; mxlc.dwControlType = dwControlType; mxlc.cControls = 0; mxlc.cbmxctrl = sizeof(MIXERCONTROL); mxlc.pamxctrl = &mxc; if (mixerGetLineControls((HMIXEROBJ)hMixer, &mxlc, MIXER_OBJECTF_HMIXER | MIXER_GETLINECONTROLSF_ONEBYTYPE) != MMSYSERR_NOERROR) { mixerClose (hMixer); return FALSE; } } if (mxc.cMultipleItems <= 0) { mixerClose (hMixer); return FALSE; } // get the index of the inDevice from available controls MIXERCONTROLDETAILS_LISTTEXT* pmxcdSelectText = new MIXERCONTROLDETAILS_LISTTEXT[mxc.cMultipleItems]; if (pmxcdSelectText != NULL) { MIXERCONTROLDETAILS mxcd; mxcd.cbStruct = sizeof(MIXERCONTROLDETAILS); mxcd.dwControlID = mxc.dwControlID; mxcd.cChannels = 1; mxcd.cMultipleItems = mxc.cMultipleItems; mxcd.cbDetails = sizeof(MIXERCONTROLDETAILS_LISTTEXT); mxcd.paDetails = pmxcdSelectText; if (mixerGetControlDetails ((HMIXEROBJ)hMixer, &mxcd, MIXER_OBJECTF_HMIXER | MIXER_GETCONTROLDETAILSF_LISTTEXT) == MMSYSERR_NOERROR) { // determine which controls the inputDevice source line DWORD dwi; for (dwi = 0; dwi < mxc.cMultipleItems; dwi++) { // get the line information MIXERLINE mxl; mxl.cbStruct = sizeof(MIXERLINE); mxl.dwLineID = pmxcdSelectText[dwi].dwParam1; if (mixerGetLineInfo ((HMIXEROBJ)hMixer, &mxl, MIXER_OBJECTF_HMIXER | MIXER_GETLINEINFOF_LINEID) == MMSYSERR_NOERROR && mxl.dwComponentType == inDev) { // found, dwi is the index. inDevIdx = dwi; // break; } } } delete []pmxcdSelectText; } if (inDevIdx < 0) { mixerClose (hMixer); return FALSE; } // get all the values first MIXERCONTROLDETAILS_BOOLEAN* pmxcdSelectValue = new MIXERCONTROLDETAILS_BOOLEAN[mxc.cMultipleItems]; if (pmxcdSelectValue != NULL) { MIXERCONTROLDETAILS mxcd; mxcd.cbStruct = sizeof(MIXERCONTROLDETAILS); mxcd.dwControlID = mxc.dwControlID; mxcd.cChannels = 1; mxcd.cMultipleItems = mxc.cMultipleItems; mxcd.cbDetails = sizeof(MIXERCONTROLDETAILS_BOOLEAN); mxcd.paDetails = pmxcdSelectValue; if (mixerGetControlDetails((HMIXEROBJ)hMixer, &mxcd, MIXER_OBJECTF_HMIXER | MIXER_GETCONTROLDETAILSF_VALUE) == MMSYSERR_NOERROR) { // ASSERT(m_dwControlType == MIXERCONTROL_CONTROLTYPE_MIXER || m_dwControlType == MIXERCONTROL_CONTROLTYPE_MUX); // MUX restricts the line selection to one source line at a time. if (dwControlType == MIXERCONTROL_CONTROLTYPE_MUX) { ZeroMemory(pmxcdSelectValue, mxc.cMultipleItems * sizeof(MIXERCONTROLDETAILS_BOOLEAN)); } // Turn on this input device pmxcdSelectValue[inDevIdx].fValue = 0x1; mxcd.cbStruct = sizeof(MIXERCONTROLDETAILS); mxcd.dwControlID = mxc.dwControlID; mxcd.cChannels = 1; mxcd.cMultipleItems = mxc.cMultipleItems; mxcd.cbDetails = sizeof(MIXERCONTROLDETAILS_BOOLEAN); mxcd.paDetails = pmxcdSelectValue; if (mixerSetControlDetails ((HMIXEROBJ)hMixer, &mxcd, MIXER_OBJECTF_HMIXER | MIXER_SETCONTROLDETAILSF_VALUE) != MMSYSERR_NOERROR) { delete []pmxcdSelectValue; mixerClose (hMixer); return FALSE; } } delete []pmxcdSelectValue; } mixerClose (hMixer); return TRUE; } // *********************************************************************************** BOOL CALLBACK Scope (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { #define SPECSCOPEWIDTH ((IDC_PROG_GRAPH_LEFT10 - IDC_PROG_GRAPH_LEFT1)+1) static BOOL inRecord = FALSE; static HWAVEIN waveInHandle = NULL; static WAVEHDR waveHeader[2]; static WAVEFORMATEX waveFormat; static FFTransform* pFFTrans = NULL; static FFTransform* pFFTransStereo = NULL; static SampleIter* pSampleIter = NULL; static RECT drawArea; static HDC HdblDC = NULL; static HBITMAP HdblOldBitmap = NULL; static int rps = 1; switch (message) { case WM_INITDIALOG: { // Set the sound meter progress bars SendMessage (GetDlgItem (hwnd, IDC_METER_LEFT), PBM_SETRANGE32, 0, 512); SendMessage (GetDlgItem (hwnd, IDC_METER_RIGHT), PBM_SETRANGE32, 0, 512); SendMessage (GetDlgItem (hwnd, IDC_REFESHSLIDER), TBM_SETRANGEMIN, FALSE, 1); SendMessage (GetDlgItem (hwnd, IDC_REFESHSLIDER), TBM_SETRANGEMAX, FALSE, 10); SendMessage (GetDlgItem (hwnd, IDC_REFESHSLIDER), TBM_SETPOS, FALSE, rps); for (int idx = 0; idx < SPECSCOPEWIDTH; idx++) { SendMessage (GetDlgItem (hwnd, IDC_PROG_GRAPH_RIGHT1