57 行
1.3 KiB
C++
57 行
1.3 KiB
C++
//#include "stdafx.h"
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#include "TZXBlockPureData.h"
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#include "TZXFile.h"
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#include <stdlib.h>
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TZXBlockPureData::TZXBlockPureData()
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{
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m_nBlockID = TZX_BLOCKID_PURE_DATA;
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m_pData = NULL;
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}
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TZXBlockPureData::~TZXBlockPureData()
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{
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if (m_pData) free(m_pData);
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}
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void TZXBlockPureData::GenerateAudio(TZXAudioGenerator *pAudioGenerator, TZXFile *pTZXFile)
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{
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m_nAudioBufferOffsetLocation = pAudioGenerator->GetCurrentLength();
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// Generate the actual data
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for (int i = 0; i < m_nDataLength; i++)
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{
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int bits = 8;
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if (i == (m_nDataLength - 1)) bits = m_nBitsInLastByte;
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for (int n = 0; n < bits; n++)
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{
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char mask = 1 << (7-n);
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char bitset = m_pData[i] & mask;
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if (bitset)
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{
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// Write a one bit
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pAudioGenerator->GeneratePulse(m_nLengthOfOnePulse);
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pAudioGenerator->GeneratePulse(m_nLengthOfOnePulse);
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}
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else {
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// Write a zero bit
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pAudioGenerator->GeneratePulse(m_nLengthOfZeroPulse);
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pAudioGenerator->GeneratePulse(m_nLengthOfZeroPulse);
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}
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}
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}
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// Add any delay at the end of the block
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if (m_nPauseAfterBlock) pAudioGenerator->AddSilence(m_nPauseAfterBlock);
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}
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char *TZXBlockPureData::GetDescription()
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{
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snprintf((char *)m_szToStringDescription, MAX_STRING_LENGTH, "Pure Data Block: %d bytes. Delay = %d ms", m_nDataLength, m_nPauseAfterBlock);
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return m_szToStringDescription;
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}
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