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// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2005 Simon Howard
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//
// DESCRIPTION:
// System interface for music.
//
//-----------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include "doomdef.h"
#include "memio.h"
#include "mus2mid.h"
#include "deh_main.h"
#include "m_misc.h"
#include "s_sound.h"
#include "w_wad.h"
#include "z_zone.h"
#define MAXMIDLENGTH (96 * 1024)
static boolean music_initialised = false;
//static boolean musicpaused = false;
static int current_music_volume;
// Shutdown music
static void I_OPL_ShutdownMusic(void)
{
}
// Initialise music subsystem
static boolean I_OPL_InitMusic(void)
{
music_initialised = true;
return true;
}
// Set music volume (0 - 127)
static void I_OPL_SetMusicVolume(int volume)
{
// Internal state variable.
current_music_volume = volume;
}
// Start playing a mid
static void I_OPL_PlaySong(void *handle, int looping)
{
if (!music_initialised)
{
return;
}
}
static void I_OPL_PauseSong(void)
{
if (!music_initialised)
{
return;
}
}
static void I_OPL_ResumeSong(void)
{
if (!music_initialised)
{
return;
}
}
static void I_OPL_StopSong(void)
{
if (!music_initialised)
{
return;
}
}
static void I_OPL_UnRegisterSong(void *handle)
{
if (!music_initialised)
{
return;
}
}
// Determine whether memory block is a .mid file
static boolean IsMid(byte *mem, int len)
{
return len > 4 && !memcmp(mem, "MThd", 4);
}
static boolean ConvertMus(byte *musdata, int len, char *filename)
{
MEMFILE *instream;
MEMFILE *outstream;
void *outbuf;
size_t outbuf_len;
int result;
instream = mem_fopen_read(musdata, len);
outstream = mem_fopen_write();
result = mus2mid(instream, outstream);
if (result == 0)
{
mem_get_buf(outstream, &outbuf, &outbuf_len);
M_WriteFile(filename, outbuf, outbuf_len);
}
mem_fclose(instream);
mem_fclose(outstream);
return result;
}
static void *I_OPL_RegisterSong(void *data, int len)
{
char *filename;
if (!music_initialised)
{
return NULL;
}
// MUS files begin with "MUS"
// Reject anything which doesnt have this signature
filename = M_TempFile("doom.mid");
if (IsMid(data, len) && len < MAXMIDLENGTH)
{
M_WriteFile(filename, data, len);
}
else
{
// Assume a MUS file and try to convert
ConvertMus(data, len, filename);
}
// ....
// remove file now
remove(filename);
Z_Free(filename);
return NULL;
}
// Is the song playing?
static boolean I_OPL_MusicIsPlaying(void)
{
if (!music_initialised)
{
return false;
}
return false;
}
static snddevice_t music_opl_devices[] =
{
SNDDEVICE_ADLIB,
SNDDEVICE_SB,
};
music_module_t music_opl_module =
{
music_opl_devices,
arrlen(music_opl_devices),
I_OPL_InitMusic,
I_OPL_ShutdownMusic,
I_OPL_SetMusicVolume,
I_OPL_PauseSong,
I_OPL_ResumeSong,
I_OPL_RegisterSong,
I_OPL_UnRegisterSong,
I_OPL_PlaySong,
I_OPL_StopSong,
I_OPL_MusicIsPlaying,
};
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