gzdoom-gles/src/sound/music_cd.cpp
Chris Robinson 0017e1e6e8 Use a FileReader to handle music resources and audio decoding
Instead of the previous method where there'd be a filename and offset, and/or a
memory pointer, this uses a class to access resource data regardless of its
underlying form.
2014-06-25 04:25:36 -07:00

116 lines
1.9 KiB
C++

#include "i_musicinterns.h"
#include "i_cd.h"
#include "files.h"
void CDSong::Play (bool looping, int subsong)
{
m_Status = STATE_Stopped;
m_Looping = looping;
if (m_Track != 0 ? CD_Play (m_Track, looping) : CD_PlayCD (looping))
{
m_Status = STATE_Playing;
}
}
void CDSong::Pause ()
{
if (m_Status == STATE_Playing)
{
CD_Pause ();
m_Status = STATE_Paused;
}
}
void CDSong::Resume ()
{
if (m_Status == STATE_Paused)
{
if (CD_Resume ())
m_Status = STATE_Playing;
}
}
void CDSong::Stop ()
{
if (m_Status != STATE_Stopped)
{
m_Status = STATE_Stopped;
CD_Stop ();
}
}
CDSong::~CDSong ()
{
Stop ();
m_Inited = false;
}
CDSong::CDSong (int track, int id)
{
bool success;
m_Inited = false;
if (id != 0)
{
success = CD_InitID (id);
}
else
{
success = CD_Init ();
}
if (success && (track == 0 || CD_CheckTrack (track)))
{
m_Inited = true;
m_Track = track;
}
}
bool CDSong::IsPlaying ()
{
if (m_Status == STATE_Playing)
{
if (CD_GetMode () != CDMode_Play)
{
Stop ();
}
}
return m_Status != STATE_Stopped;
}
CDDAFile::CDDAFile (std::auto_ptr<FileReader> reader)
: CDSong ()
{
DWORD chunk;
WORD track;
DWORD discid;
long endpos = reader->Tell() + reader->GetLength() - 8;
// I_RegisterSong already identified this as a CDDA file, so we
// just need to check the contents we're interested in.
reader->Seek(12, SEEK_CUR);
while (reader->Tell() < endpos)
{
reader->Read(&chunk, 4);
if (chunk != (('f')|(('m')<<8)|(('t')<<16)|((' ')<<24)))
{
reader->Read(&chunk, 4);
reader->Seek(chunk, SEEK_CUR);
}
else
{
reader->Seek(6, SEEK_CUR);
reader->Read(&track, 2);
reader->Read(&discid, 4);
if (CD_InitID (discid) && CD_CheckTrack (track))
{
m_Inited = true;
m_Track = track;
}
return;
}
}
}