public CDRom()
{
m_BRAM = new SaveMemoryBank();
m_Ram = new RamBank[32];
m_CDInserted = false;
m_ADPCM = new ADPCM();
for (int i = 0; i < 32; i++)
{
m_Ram[i] = new RamBank();
}
m_Playing = null;
m_AudioPaused = false;
m_PlayChunk = new byte[0x20000];
m_FadeCurrent = 1.0f;
m_FadeDown = false;
m_FadeUp = false;
m_FadeStep = 0.0f;
m_DataReady = false;
m_DataTransferDone = false;
m_CDRomState = CDState.RESET;
}
private void PlayAudioTrack(int msfStart, int msfEnd)
{
if (!m_CDInserted)
{
return;
}
for (int i = 0; i < m_CDTracks.Length; i++)
{
if (m_CDTracks[i].m_Frame < msfStart)
{
continue;
}
msfStart -= m_CDTracks[i].m_Frame;
msfEnd -= m_CDTracks[i].m_Frame;
m_Playing = m_CDTracks[i];
m_Playing.m_WaveOffset = m_Playing.m_WaveStart + msfStart * 2352;
m_Playing.m_WaveEnd = m_Playing.m_WaveStart + msfEnd * 2352;
return;
}
m_Playing = null;
}
public void LoadCue(string file)
{
StreamReader text = new StreamReader(file);
Queue q = new Queue();
CDTrack track = null;
Console.WriteLine("Opening CD: {0}", file);
int frame = 0;
int i;
while (!text.EndOfStream)
{
string[] line = text.ReadLine().Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
switch (line[0])
{
case "FILE":
if (track != null)
{
q.Enqueue(track);
}
track = new CDTrack();
file = "";
for (i = 1; i < line.Length; i++)
{
file += line[i];
if (file[0] != '"')
{
i++;
break;
}
if (file[file.Length - 1] == '"')
{
file = file.Substring(1, file.Length - 2);
i++;
break;
}
}
track.m_DataSource = new FileStream(file, FileMode.Open, FileAccess.Read);
switch (line[i])
{
case "WAVE":
track.m_TrackType = TrackType.WAVE;
break;
case "BINARY":
track.m_TrackType = TrackType.BINARY;
break;
default:
Console.WriteLine("Unknown track type {0}", line[i]);
track.m_TrackType = TrackType.UNKNOWN;
return;
}
track.m_Frame = frame;
break;
case "TRACK":
i = Convert.ToInt32(line[1]);
if (i - 1 == q.Count)
{
switch (line[2])
{
case "AUDIO":
if (track.m_TrackType != TrackType.WAVE)
{
Console.WriteLine("AUDIO line with an unknown track data source");
return;
}
i = WaveSize(track.m_DataSource);
track.m_WaveStart = (int)track.m_DataSource.Length - i;
frame += i / 2352;
if (i < 0)
{
Console.WriteLine("Audio track was not in the proper format (16b PCM Stereo)");
return;
}
break;
case "MODE1/2048":
if (track.m_TrackType != TrackType.BINARY)
{
Console.WriteLine("MODE1/2048 line with an unknown track data source");
return;
}
// This is a mode1 / 2048 line (no subq channel info)
frame += (int)track.m_DataSource.Length / 2048;
break;
default:
Console.WriteLine("Unknown Data Source {0}", line[2]);
break;
}
}
else
{
Console.WriteLine("Cue file TRACK number is out of order");
return;
}
break;
case "PREGAP":
{
string[] msf_s = line[1].Split(new char[] { ':' });
int msf = (Convert.ToInt32(msf_s[0]) * 60 + Convert.ToInt32(msf_s[1])) * 75 + Convert.ToInt32(msf_s[2]);
frame += msf;
track.m_Frame += msf;
}
break;
case "POSTGAP":
{
string[] msf_s = line[1].Split(new char[] { ':' });
int msf = (Convert.ToInt32(msf_s[0]) * 60 + Convert.ToInt32(msf_s[1])) * 75 + Convert.ToInt32(msf_s[2]);
frame += msf;
}
break;
case "INDEX":
// THIS IS IGNORED (I don't think the system actually uses it)
break;
}
}
// Shove the last track to the TOC
m_CDTracks = new CDTrack[q.Count + 2];
m_CDTracks[q.Count] = track;
// Append leadout track
track = new CDTrack();
m_CDTracks[m_CDTracks.Length - 1] = track;
track.m_Frame = frame;
track.m_Track = 0;
track.m_TrackType = TrackType.LEADOUT;
for (i = 0; q.Count > 0; i++)
{
m_CDTracks[i] = (CDTrack)q.Dequeue();
}
for (i = 0; i < m_CDTracks.Length; i++)
{
track = m_CDTracks[i];
int f = track.m_Frame + 150;
track.m_MSF_M = f / 75 / 60;
track.m_MSF_S = f / 75 % 60;
track.m_MSF_F = f % 75;
track.m_Track = i + 1;
}
m_CDInserted = true;
}
public unsafe void MixCD(short *buffer, int length)
{
if (m_AudioPaused || m_Playing == null)
{
return;
}
int count = (int)m_Playing.m_DataSource.Length - m_Playing.m_WaveOffset;
if (length < count)
{
count = length;
}
m_Playing.m_DataSource.Position = m_Playing.m_WaveOffset;
m_Playing.m_DataSource.Read(m_PlayChunk, 0, count);
int i = 0;
length /= 2;
while (length > 0)
{
// Mix the channels
if (m_FadeUp || m_FadeDown)
{
*(buffer++) += m_OutLeft = (short)((m_PlayChunk[i + 1] << 8 | m_PlayChunk[i]) * m_FadeCurrent);
i += 2;
*(buffer++) += m_OutRight = (short)((m_PlayChunk[i + 1] << 8 | m_PlayChunk[i]) * m_FadeCurrent);
i += 2;
if (m_FadeDown)
{
if (m_FadeCurrent > 0.0f)
{
m_FadeCurrent -= m_FadeStep;
}
else
{
m_FadeDown = false;
}
}
else
{
if (m_FadeCurrent < 1.0f)
{
m_FadeCurrent += m_FadeStep;
}
else
{
m_FadeUp = false;
}
}
}
else if (m_FadeCurrent > 0.0f)
{
*(buffer++) += m_OutLeft = (short)(m_PlayChunk[i + 1] << 8 | m_PlayChunk[i]);
i += 2;
*(buffer++) += m_OutRight = (short)(m_PlayChunk[i + 1] << 8 | m_PlayChunk[i]);
i += 2;
}
length -= 4;
}
m_Playing.m_WaveOffset += count;
if (m_Playing.m_WaveOffset > m_Playing.m_WaveEnd)
{
m_Playing = null;
}
}
