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/* ScummVM - Scumm Interpreter
* Copyright (C) 2002 R�diger Hanke
*
* 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.
*
* MorphOS sound support
*
* $Header$
*
*/
#include "stdafx.h"
#include "engine.h"
#include <dos/dos.h>
#include <exec/memory.h>
#include <devices/ahi.h>
#include <devices/etude.h>
#include <clib/alib_protos.h>
#include <proto/exec.h>
#include <proto/dos.h>
#include <proto/ahi.h>
#include "morphos.h"
#include "morphos_sound.h"
#define AHI_BUF_SIZE (8*1024)
SignalSemaphore ScummMusicThreadRunning;
SignalSemaphore ScummSoundThreadRunning;
static MsgPort *ahiPort = NULL;
static AHIRequest *ahiReq[2] = { NULL, NULL };
static UWORD ahiCurBuf = 0;
static bool ahiReqSent[2] = { false, false };
static BYTE ahiDevice = -1;
UBYTE ahiUnit = AHI_DEFAULT_UNIT;
static char *ahiBuf[2] = { NULL, NULL };
static MsgPort *ScummMidiPort = NULL;
IOMidiRequest *ScummMidiRequest = NULL;
Device *EtudeBase = NULL;
bool init_morphos_music(ULONG MidiUnit, ULONG DevFlags)
{
MidiUnit = ScummMidiUnit; // Ugly fix, but ...
ScummMidiPort = CreateMsgPort();
if (ScummMidiPort)
{
ScummMidiRequest = (IOMidiRequest *) CreateIORequest(ScummMidiPort, sizeof (IOMidiRequest));
if (ScummMidiRequest)
{
ScummMidiRequest->emr_Version = 1;
if (OpenDevice(ETUDENAME, MidiUnit, (IORequest *) ScummMidiRequest, DevFlags))
{
DeleteIORequest((IORequest *) ScummMidiRequest);
DeleteMsgPort(ScummMidiPort);
ScummMidiRequest = NULL;
ScummMidiPort = NULL;
}
EtudeBase = ScummMidiRequest->emr_Std.io_Device;
}
else
{
DeleteMsgPort(ScummMidiPort);
ScummMidiPort = NULL;
}
}
if (!ScummMidiRequest)
{
warning("Could not open Etude - music will not play");
return false;
}
return true;
}
void exit_morphos_music()
{
if (ScummMidiRequest)
{
CloseDevice((IORequest *) ScummMidiRequest);
DeleteIORequest((IORequest *) ScummMidiRequest);
DeleteMsgPort(ScummMidiPort);
ScummMidiRequest = NULL;
ScummMidiPort = NULL;
EtudeBase = NULL;
}
}
static bool init_morphos_sound()
{
if (!(ahiPort = CreateMsgPort()))
return false;
if (!(ahiReq[0] = (AHIRequest *) CreateIORequest(ahiPort, sizeof (AHIRequest))))
{
DeleteMsgPort(ahiPort);
ahiPort = NULL;
return false;
}
if (!(ahiReq[1] = (AHIRequest *) AllocVec(sizeof (AHIRequest), MEMF_PUBLIC)))
{
DeleteIORequest(ahiReq[0]);
DeleteMsgPort(ahiPort);
ahiReq[0] = NULL;
ahiPort = NULL;
return false;
}
if (!(ahiBuf[0] = (char *) AllocVec(2*AHI_BUF_SIZE, MEMF_PUBLIC)))
{
FreeVec(ahiReq[1]);
DeleteIORequest(ahiReq[0]);
DeleteMsgPort(ahiPort);
ahiReq[0] = NULL;
ahiReq[1] = NULL;
ahiPort = NULL;
return false;
}
ahiBuf[1] = &ahiBuf[0][AHI_BUF_SIZE];
ahiReq[0]->ahir_Version = 4;
if (ahiDevice = OpenDevice(AHINAME, 0, (IORequest *) ahiReq[0], 0))
{
FreeVec(ahiBuf[0]);
FreeVec(ahiReq[1]);
DeleteIORequest(ahiReq[0]);
DeleteMsgPort(ahiPort);
ahiBuf[0] = NULL;
ahiReq[0] = NULL;
ahiReq[1] = NULL;
ahiPort = NULL;
return false;
}
CopyMem(ahiReq[0], ahiReq[1], sizeof (AHIRequest));
ahiCurBuf = 0;
ahiReqSent[0] = FALSE;
ahiReqSent[1] = FALSE;
return true;
}
static void exit_morphos_sound()
{
if (ahiReq[1])
FreeVec(ahiReq[1]);
if (ahiReq[0])
{
CloseDevice((IORequest *) ahiReq[0]);
DeleteIORequest(ahiReq[0]);
}
if (ahiBuf[0])
FreeVec((APTR) ahiBuf[0]);
if (ahiPort)
DeleteMsgPort(ahiPort);
}
int morphos_sound_thread(OSystem_MorphOS *syst, ULONG SampleType)
{
ULONG signals;
bool initialized;
ObtainSemaphore(&ScummSoundThreadRunning);
initialized = init_morphos_sound();
if (!initialized)
{
warning("Sound could not be initialized. The game may hang at some point (press Ctrl-z then).");
Wait(SIGBREAKF_CTRL_C);
}
else
{
for (;;)
{
while (!ahiReqSent[ahiCurBuf] || CheckIO((IORequest *) ahiReq[ahiCurBuf]))
{
AHIRequest *req = ahiReq[ahiCurBuf];
UWORD ahiOtherBuf = !ahiCurBuf;
if (ahiReqSent[ahiCurBuf])
WaitIO((IORequest *) req);
syst->fill_sound((byte *) ahiBuf[ahiCurBuf], AHI_BUF_SIZE);
req->ahir_Std.io_Message.mn_Node.ln_Pri = 0;
req->ahir_Std.io_Command = CMD_WRITE;
req->ahir_Std.io_Data = ahiBuf[ahiCurBuf];
req->ahir_Std.io_Length = AHI_BUF_SIZE;
req->ahir_Type = SampleType;
req->ahir_Frequency = SAMPLES_PER_SEC;
req->ahir_Position = 0x8000;
req->ahir_Volume = 0x10000;
req->ahir_Link = (ahiReqSent[ahiOtherBuf] && !CheckIO((IORequest *) ahiReq[ahiOtherBuf])) ? ahiReq[ahiOtherBuf] : NULL;
SendIO((IORequest *)req);
ahiReqSent[ahiCurBuf] = true;
ahiCurBuf = ahiOtherBuf;
}
signals = Wait(SIGBREAKF_CTRL_C | (1 << ahiPort->mp_SigBit));
if (signals & SIGBREAKF_CTRL_C)
break;
}
if (ahiReqSent[ahiCurBuf])
{
AbortIO((IORequest *) ahiReq[ahiCurBuf]);
WaitIO((IORequest *) ahiReq[ahiCurBuf]);
ahiReqSent[ahiCurBuf] = false;
}
if (ahiReqSent[!ahiCurBuf])
{
AbortIO((IORequest *) ahiReq[!ahiCurBuf]);
WaitIO((IORequest *) ahiReq[!ahiCurBuf]);
ahiReqSent[!ahiCurBuf] = false;
}
}
exit_morphos_sound();
ReleaseSemaphore(&ScummSoundThreadRunning);
RemTask(NULL);
return 0;
}
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