bool QTapeView::tapeReadCallback(unsigned int samples)
{
if (m_hTapeWavPcmFile == (HWAVPCMFILE)INVALID_HANDLE_VALUE) return 0;
if (m_okTapeRecording) return 0;
if (samples == 0) return 0;
unsigned int value = 0;
for (unsigned int i = 0; i < samples; i++)
{
value = WavPcmFile_ReadOne((HWAVPCMFILE)m_hTapeWavPcmFile);
}
BOOL result = (value > 0xffffffff / 2);
DWORD wavLength = WavPcmFile_GetLength((HWAVPCMFILE)m_hTapeWavPcmFile);
DWORD wavPos = WavPcmFile_GetPosition((HWAVPCMFILE)m_hTapeWavPcmFile);
if (wavPos >= wavLength) // End of tape
this->stopTape();
int wavFreq = WavPcmFile_GetFrequency((HWAVPCMFILE)m_hTapeWavPcmFile);
if (wavPos - m_dwTapePositionShown > (DWORD)(wavFreq / 6) || !m_okTapePlaying)
{
this->updatePosition();
}
return result;
}
// Tape emulator callback used to read a tape recorded data.
// Input:
// samples Number of samples to play.
// Output:
// result Bit to put in tape input port.
BOOL CALLBACK TapeView_TapeReadCallback(unsigned int samples)
{
if (samples == 0) return 0;
// Scroll buffer
memmove(m_TapeBuffer, m_TapeBuffer + samples, TAPE_BUFFER_SIZE - samples);
UINT value = 0;
for (UINT i = 0; i < samples; i++)
{
value = WavPcmFile_ReadOne(m_hTapeWavPcmFile);
*(m_TapeBuffer + TAPE_BUFFER_SIZE - samples + i) = (BYTE)((value >> 24) & 0xff);
}
BOOL result = (value >= UINT_MAX / 2);
InvalidateRect(m_hwndTapeGraph, NULL, FALSE);
DWORD wavLength = WavPcmFile_GetLength(m_hTapeWavPcmFile);
DWORD wavPos = WavPcmFile_GetPosition(m_hTapeWavPcmFile);
if (wavPos >= wavLength) // End of tape
TapeView_StopTape();
int wavFreq = WavPcmFile_GetFrequency(m_hTapeWavPcmFile);
if (wavPos - m_dwTapePositionShown > (DWORD)(wavFreq / 6) || !m_okTapePlaying)
{
TapeView_UpdatePosition();
}
//#if !defined(PRODUCT)
// DebugPrintFormat(_T("Tape: %d\r\n"), result);
//#endif
return result;
}
void QTapeView::openTape(const QString &sFileName)
{
LPCTSTR lpszFile = qPrintable(sFileName);
m_hTapeWavPcmFile = WavPcmFile_Open(lpszFile);
if (m_hTapeWavPcmFile == INVALID_HANDLE_VALUE)
return; //TODO: Report about a bad WAV file
m_sTapeFile = sFileName;
m_okTapeInserted = true;
m_okTapeRecording = false;
m_buttonPlay->setEnabled(true);
m_buttonPlay->setText(_T("Play"));
m_buttonRewind->setEnabled(true);
m_labelFile->setText(lpszFile);
this->updatePosition();
DWORD wavLength = WavPcmFile_GetLength((HWAVPCMFILE)m_hTapeWavPcmFile);
int wavFreq = WavPcmFile_GetFrequency((HWAVPCMFILE)m_hTapeWavPcmFile);
double wavLengthSeconds = double(wavLength) / wavFreq;
TCHAR buffer[64];
_sntprintf(buffer, 64, _T("%d:%02d.%02d, %d Hz"),
int(wavLengthSeconds) / 60, int(wavLengthSeconds) % 60, int(wavLengthSeconds * 100) % 100, wavFreq);
m_labelTotal->setText(buffer);
m_buttonOpen->setText(_T("Close WAV"));
m_buttonSave->setEnabled(false);
}
void TapeView_OpenTape(LPCTSTR lpszFile)
{
m_hTapeWavPcmFile = WavPcmFile_Open(lpszFile);
if (m_hTapeWavPcmFile == INVALID_HANDLE_VALUE)
return; //TODO: Report about a bad WAV file
_tcscpy_s(m_szTapeFile, MAX_PATH, lpszFile);
m_okTapeInserted = TRUE;
m_okTapeRecording = FALSE;
EnableWindow(m_hwndTapePlay, TRUE);
SetWindowText(m_hwndTapePlay, _T("Play"));
EnableWindow(m_hwndTapeRewind, TRUE);
SetWindowText(m_hwndTapeFile, lpszFile);
TapeView_UpdatePosition();
TapeView_ClearGraph();
DWORD wavLength = WavPcmFile_GetLength(m_hTapeWavPcmFile);
int wavFreq = WavPcmFile_GetFrequency(m_hTapeWavPcmFile);
double wavLengthSeconds = double(wavLength) / wavFreq;
TCHAR buffer[64];
wsprintf(buffer, _T("%d:%02d.%02d, %d Hz"),
int(wavLengthSeconds) / 60, int(wavLengthSeconds) % 60, int(wavLengthSeconds * 100) % 100, wavFreq);
SetWindowText(m_hwndTapeTotal, buffer);
SetWindowText(m_hwndTapeOpen, _T("Close WAV"));
EnableWindow(m_hwndTapeSave, FALSE);
}