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#include <memory></memory>
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#include "tmachine.h"
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#include "tsio_wav.h"
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#include "tsystem.h"
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#include "tfilepath_io.h"
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#include "tsioutils.h"
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using namespace std;
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#if !defined(TNZ_LITTLE_ENDIAN)
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TNZ_LITTLE_ENDIAN undefined !!
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#endif
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//==============================================================================
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// TWAVChunk: classe base per i vari chunk WAV
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class TWAVChunk {
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public:
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  static TINT32 HDR_LENGTH;
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  string m_name;
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  TINT32 m_length;  // lunghezza del chunk in byte
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  TWAVChunk(string name, TINT32 length) : m_name(name), m_length(length) {}
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  virtual ~TWAVChunk() {}
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  virtual bool read(Tifstream &is) {
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    skip(is);
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    return true;
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  }
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  void skip(Tifstream &is) { is.seekg(m_length, ios::cur); }
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  static bool readHeader(Tifstream &is, string &name, TINT32 &length) {
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    char cName[5];
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    TINT32 len = 0;
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    memset(cName, 0, sizeof(cName));
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    is.read(cName, 4);
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    if (is.fail()) return false;
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    cName[4] = '\0';
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    is.read((char *)&len, sizeof(len));
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    if (is.fail()) return false;
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    // il formato WAV memorizza i dati come little-endian
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    // se la piattaforma non e' little-endian bisogna scambiare i byte
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    if (!TNZ_LITTLE_ENDIAN) len = swapTINT32(len);
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    name   = string(cName);
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    length = len;
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    return true;
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  }
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};
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TINT32 TWAVChunk::HDR_LENGTH = 8;
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//====================================================================
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//  FMT Chunk: Chunk contenente le informazioni sulla traccia
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class TFMTChunk final : public TWAVChunk {
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public:
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  static TINT32 LENGTH;
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  USHORT m_encodingType;  // PCM, ...
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  USHORT m_chans;         // numero di canali
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  TUINT32 m_sampleRate;
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  TUINT32 m_avgBytesPerSecond;
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  USHORT m_bytesPerSample;
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  USHORT m_bitPerSample;
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  TFMTChunk(TINT32 length) : TWAVChunk("fmt ", length) {}
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  bool read(Tifstream &is) override {
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    is.read((char *)&m_encodingType, sizeof(m_encodingType));
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    is.read((char *)&m_chans, sizeof(m_chans));
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    is.read((char *)&m_sampleRate, sizeof(m_sampleRate));
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    is.read((char *)&m_avgBytesPerSecond, sizeof(m_avgBytesPerSecond));
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    is.read((char *)&m_bytesPerSample, sizeof(m_bytesPerSample));
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    is.read((char *)&m_bitPerSample, sizeof(m_bitPerSample));
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    if (!TNZ_LITTLE_ENDIAN) {
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      m_encodingType      = swapUshort(m_encodingType);
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      m_chans             = swapUshort(m_chans);
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      m_sampleRate        = swapTINT32(m_sampleRate);
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      m_avgBytesPerSecond = swapTINT32(m_avgBytesPerSecond);
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      m_bytesPerSample    = swapUshort(m_bytesPerSample);
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      m_bitPerSample      = swapUshort(m_bitPerSample);
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    }
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    assert(m_length >= 16);
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    if (m_length > 16) is.seekg((long)is.tellg() + m_length - 16);
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    return true;
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  }
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  bool write(ofstream &os) {
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    TUINT32 length         = m_length;
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    USHORT type            = m_encodingType;
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    USHORT chans           = m_chans;
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    TUINT32 sampleRate     = m_sampleRate;
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    TUINT32 bytesPerSecond = m_avgBytesPerSecond;
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    USHORT bytesPerSample  = m_bytesPerSample;
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    USHORT bitPerSample    = m_bitPerSample;
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    if (!TNZ_LITTLE_ENDIAN) {
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      length         = swapTINT32(length);
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      type           = swapUshort(type);
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      chans          = swapUshort(chans);
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      sampleRate     = swapTINT32(sampleRate);
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      bytesPerSecond = swapTINT32(bytesPerSecond);
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      bytesPerSample = swapUshort(bytesPerSample);
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      bitPerSample   = swapUshort(bitPerSample);
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    }
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    os.write((char *)"fmt ", 4);
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    os.write((char *)&length, sizeof(length));
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    os.write((char *)&type, sizeof(type));
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    os.write((char *)&chans, sizeof(chans));
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    os.write((char *)&sampleRate, sizeof(sampleRate));
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    os.write((char *)&bytesPerSecond, sizeof(bytesPerSecond));
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    os.write((char *)&bytesPerSample, sizeof(bytesPerSample));
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    os.write((char *)&bitPerSample, sizeof(bitPerSample));
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    return true;
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  }
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};
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TINT32 TFMTChunk::LENGTH = TWAVChunk::HDR_LENGTH + 16;
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//====================================================================
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//  DATA Chunk: Chunk contenente i campioni
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class TDATAChunk final : public TWAVChunk {
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public:
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  std::unique_ptr<uchar[]> m_samples;</uchar[]>
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  TDATAChunk(TINT32 length) : TWAVChunk("data", length) {}
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  bool read(Tifstream &is) override {
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    // alloca il buffer dei campioni
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    m_samples.reset(new UCHAR[m_length]);
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    if (!m_samples) return false;
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    is.read((char *)m_samples.get(), m_length);
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    return true;
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  }
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  bool write(ofstream &os) {
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    TINT32 length = m_length;
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    if (!TNZ_LITTLE_ENDIAN) {
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      length = swapTINT32(length);
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    }
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    os.write((char *)"data", 4);
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    os.write((char *)&length, sizeof(length));
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    os.write((char *)m_samples.get(), m_length);
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    return true;
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  }
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};
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//==============================================================================
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TSoundTrackReaderWav::TSoundTrackReaderWav(const TFilePath &fp)
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    : TSoundTrackReader(fp) {}
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//------------------------------------------------------------------------------
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TSoundTrackP TSoundTrackReaderWav::load() {
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  char chunkName[5];
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  char RIFFType[5];
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  TINT32 chunkLength;
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  Tifstream is(m_path);
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  if (!is) throw TException(m_path.getWideString() + L" : File doesn't exist");
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  // legge il nome del chunk
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  is.read((char *)&chunkName, sizeof(chunkName) - 1);
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  chunkName[4] = '\0';
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  // legge la lunghezza del chunk
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  is.read((char *)&chunkLength, sizeof(chunkLength));
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  if (!TNZ_LITTLE_ENDIAN) chunkLength = swapTINT32(chunkLength);
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  // legge il RIFFType
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  is.read((char *)&RIFFType, sizeof(RIFFType) - 1);
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  RIFFType[4] = '\0';
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  // per i .wav il RIFFType DEVE essere uguale a "WAVE"
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  if ((string(RIFFType, 4) != "WAVE"))
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    throw TException("The WAV file doesn't contain the WAVE form");
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  TFMTChunk *fmtChunk   = 0;
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  TDATAChunk *dataChunk = 0;
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  while (!is.eof()) {
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    string name   = "";
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    TINT32 length = 0;
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    bool ret = TWAVChunk::readHeader(is, name, length);
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    if (!ret) break;
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    // legge solo i chunk che ci interessano, ossia FMT e DATA
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    if (name == "fmt ") {
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      // legge i dati del chunk FMT
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      fmtChunk = new TFMTChunk(length);
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      fmtChunk->read(is);
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      // considera il byte di pad alla fine del chunk nel caso
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      // in cui la lunghezza di questi e' dispari
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      if (length & 1) {
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        is.seekg((long)is.tellg() + 1);
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      }
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    } else if (name == "data") {
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      // legge i dati del chunk DATA
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      dataChunk = new TDATAChunk(length);
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      dataChunk->read(is);
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      // considera il byte di pad alla fine del chunk nel caso
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      // in cui la lunghezza di questi e' dispari
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      if (length & 1) {
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        is.seekg((long)is.tellg() + 1);
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      }
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    } else {
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      // spostati nello stream di un numero di byte pari a length
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      if (length & 1)
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        is.seekg((long)is.tellg() + (long)length + 1);
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      else
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        is.seekg((long)is.tellg() + (long)length);
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    }
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  }
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  TSoundTrackP track = 0;
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  if (fmtChunk && dataChunk) {
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    TINT32 sampleCount = dataChunk->m_length / fmtChunk->m_bytesPerSample;
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    int sampleType = 0;
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    if (fmtChunk->m_encodingType == 1)  // WAVE_FORMAT_PCM
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      sampleType = (fmtChunk->m_bitPerSample == 8) ? TSound::UINT : TSound::INT;
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    else if (fmtChunk->m_encodingType == 3)  // WAVE_FORMAT_IEEE_FLOAT
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      sampleType = TSound::FLOAT;
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    if (sampleType)  // valid sample type
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      track = TSoundTrack::create((int)fmtChunk->m_sampleRate,
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                                  fmtChunk->m_bitPerSample, fmtChunk->m_chans,
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                                  sampleCount, sampleType);
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    if (track) {
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      if (!TNZ_LITTLE_ENDIAN) {
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        switch (fmtChunk->m_bitPerSample) {
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        case 16:
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          swapAndCopy16Bits((short *)dataChunk->m_samples.get(),
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                            (short *)track->getRawData(),
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                            sampleCount * fmtChunk->m_chans);
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          break;
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        case 24:
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          swapAndCopy24Bits((short *)dataChunk->m_samples.get(),
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                            (short *)track->getRawData(),
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                            sampleCount * fmtChunk->m_chans);
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          break;
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        case 32:
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          swapAndCopy32Bits((TINT32 *)dataChunk->m_samples.get(),
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                            (TINT32 *)track->getRawData(),
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                            sampleCount * fmtChunk->m_chans);
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          break;
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        default:
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          memcpy((void *)track->getRawData(),
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                 (void *)(dataChunk->m_samples.get()),
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                 sampleCount * fmtChunk->m_bytesPerSample);
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          break;
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        }
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      } else {
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        memcpy((void *)track->getRawData(),
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               (void *)(dataChunk->m_samples.get()),
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               sampleCount * fmtChunk->m_bytesPerSample);
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      }
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    }
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  }
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  if (fmtChunk) delete fmtChunk;
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  if (dataChunk) delete dataChunk;
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  return track;
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}
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//==============================================================================
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TSoundTrackWriterWav::TSoundTrackWriterWav(const TFilePath &fp)
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    : TSoundTrackWriter(fp) {}
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//------------------------------------------------------------------------------
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bool TSoundTrackWriterWav::save(const TSoundTrackP &sndtrack) {
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  if (!sndtrack)
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    throw TException(L"Unable to save the soundtrack: " +
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                     m_path.getWideString());
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  if (sndtrack->getBitPerSample() == 8 && sndtrack->isSampleSigned())
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    throw TException("The format (8 bit signed) is incompatible with WAV file");
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MCCCS a0ce32
  TINT32 soundDataLength =
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      (TINT32)(sndtrack->getSampleCount() * (sndtrack->getBitPerSample() / 8) *
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               sndtrack->getChannelCount() /*sndtrack->getSampleSize()*/);
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  TINT32 RIFFChunkLength =
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      TFMTChunk::LENGTH + TWAVChunk::HDR_LENGTH + soundDataLength;
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  TFileStatus fs(m_path);
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  if (fs.doesExist() && !fs.isWritable())
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    throw TException(L"Unable to save the soundtrack: " +
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                     m_path.getWideString() + L" is read-only");
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  Tofstream os(m_path);
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  TFMTChunk fmtChunk(16);
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  fmtChunk.m_encodingType      = sndtrack->getSampleType() & TSound::WMASK;
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  fmtChunk.m_chans             = sndtrack->getChannelCount();
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  fmtChunk.m_sampleRate        = sndtrack->getSampleRate();
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  fmtChunk.m_avgBytesPerSecond = (sndtrack->getBitPerSample() / 8) *
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                                 fmtChunk.m_chans * sndtrack->getSampleRate();
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  // sndtrack->getSampleSize()*sndtrack->getSampleRate();
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  fmtChunk.m_bytesPerSample = (sndtrack->getBitPerSample() / 8) *
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                              fmtChunk.m_chans;  // sndtrack->getSampleSize();
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  fmtChunk.m_bitPerSample = sndtrack->getBitPerSample();
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  TDATAChunk dataChunk(soundDataLength);
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  std::unique_ptr<uchar[]> waveData(new UCHAR[soundDataLength]);</uchar[]>
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  if (!TNZ_LITTLE_ENDIAN) RIFFChunkLength = swapTINT32(RIFFChunkLength);
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  if (!TNZ_LITTLE_ENDIAN) {
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    switch (fmtChunk.m_bitPerSample) {
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    case 16:
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      swapAndCopy16Bits((short *)sndtrack->getRawData(),
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                        (short *)waveData.get(),
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                        sndtrack->getSampleCount() * fmtChunk.m_chans);
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      break;
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    case 24:
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      swapAndCopy24Bits((void *)sndtrack->getRawData(), (void *)waveData.get(),
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                        sndtrack->getSampleCount() * fmtChunk.m_chans);
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      break;
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    case 32:
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      swapAndCopy32Bits((TINT32 *)sndtrack->getRawData(),
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                        (TINT32 *)waveData.get(),
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                        sndtrack->getSampleCount() * fmtChunk.m_chans);
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      break;
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    default:
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      memcpy((void *)waveData.get(), (void *)sndtrack->getRawData(),
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             soundDataLength);
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      break;
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    }
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  } else {
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    memcpy((void *)waveData.get(), (void *)sndtrack->getRawData(),
justburner 9369f1
           soundDataLength);
Shinya Kitaoka 120a6e
  }
justburner 9369f1
Shinya Kitaoka 120a6e
  dataChunk.m_samples = std::move(waveData);
Toshihiro Shimizu 890ddd
Shinya Kitaoka 120a6e
  os.write("RIFF", 4);
Shinya Kitaoka 120a6e
  os.write((char *)&RIFFChunkLength, sizeof(TINT32));
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  os.write("WAVE", 4);
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  fmtChunk.write(os);
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  dataChunk.write(os);
Toshihiro Shimizu 890ddd
Shinya Kitaoka 120a6e
  return true;
Toshihiro Shimizu 890ddd
}