diff options
Diffstat (limited to 'backends/platform/morphos/morphos_sound.cpp')
| -rw-r--r-- | backends/platform/morphos/morphos_sound.cpp | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/backends/platform/morphos/morphos_sound.cpp b/backends/platform/morphos/morphos_sound.cpp new file mode 100644 index 0000000000..c5c2f3b7ad --- /dev/null +++ b/backends/platform/morphos/morphos_sound.cpp @@ -0,0 +1,254 @@ +/* ScummVM - Scumm Interpreter + * Copyright (C) 2002 Rüdiger 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * MorphOS sound support + * + * $URL$ + * $Id$ + * + */ + +#include "common/stdafx.h" +#include "base/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 etude_available() +{ + bool avail = init_morphos_music(ScummMidiUnit, ETUDEF_DIRECT); + if (avail) + exit_morphos_music(); + return avail; +} + +bool init_morphos_music(ULONG MidiUnit, ULONG DevFlags) +{ + 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; + } + else + EtudeBase = ScummMidiRequest->emr_Std.io_Device; + } + else + { + DeleteMsgPort(ScummMidiPort); + ScummMidiPort = NULL; + } + } + + if (!ScummMidiRequest) + 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; + + 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(); + + return 0; +} + |