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/*********************************************************************
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* OpenTTD: An Open Source Transport Tycoon Deluxe clone *
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* Copyright (c) 2002-2004 OpenTTD Developers. All Rights Reserved. *
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* *
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* Web site: http://openttd.sourceforge.net/ *
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*********************************************************************/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* DirectMusic driver for Win32 */
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/* Based on dxmci from TTDPatch */
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#include "stdafx.h"
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#ifdef WIN32_ENABLE_DIRECTMUSIC_SUPPORT
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// for gcc, the GUIDs are available in a library instead
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#ifndef __GNUC__
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#define INITGUID
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "ttd.h"
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#include "sound.h"
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#include "hal.h"
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#ifdef __cplusplus
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}
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#endif
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#include <windows.h>
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#include <stdio.h>
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#include <dmksctrl.h>
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#include <dmusici.h>
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#include <dmusicc.h>
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#include <dmusicf.h>
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#define VARIANT int
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#define MSGBOX(output) DEBUG(misc, 0) ("DirectMusic driver: %s\n", output); //MessageBox(NULL, output, "dxmci",MB_OK);
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#define MULTI_TO_WIDE( x,y ) MultiByteToWideChar( CP_ACP,MB_PRECOMPOSED, y,-1,x,_MAX_PATH);
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// the performance object controls manipulation of the segments
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IDirectMusicPerformance *performance = NULL;
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// the segment object is where the MIDI data is stored for playback
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IDirectMusicSegment *segment = NULL;
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// the loader bject can load many types of DMusic related files
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IDirectMusicLoader *loader = NULL;
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// whether we've initialized COM or not (when deciding whether to shut down)
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int COMInitialized = 0;
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extern "C" bool LoadLibraryList(void **proc, const char *dll);
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// Use lazy linking
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struct ProcPtrs {
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unsigned long (WINAPI *CoCreateInstance)(REFCLSID rclsid, LPUNKNOWN pUnkOuter, DWORD dwClsContext, REFIID riid, LPVOID * ppv);
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HRESULT (WINAPI *CoInitialize)( LPVOID pvReserved );
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void (WINAPI *CoUninitialize)( );
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};
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#define M(x) x "\0"
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static const char ole_files[] =
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M("ole32.dll")
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M("CoCreateInstance")
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M("CoInitialize")
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M("CoUninitialize")
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M("")
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;
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#undef M
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static ProcPtrs _proc;
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static bool LoadOleDLL()
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{
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if (_proc.CoCreateInstance != NULL)
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return true;
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if (!LoadLibraryList((void**)&_proc, ole_files))
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return false;
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return true;
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}
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#ifdef __cplusplus
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extern "C" {
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#endif
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// Initialize COM and DirectMusic
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bool InitDirectMusic (void)
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{
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if (NULL != performance)
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return true;
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// Initialize COM
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if (!COMInitialized) {
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if (!LoadOleDLL()) {
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MSGBOX("ole32.dll load failed");
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return false;
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}
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_proc.CoInitialize(NULL);
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COMInitialized = 1;
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}
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// Create the performance object via CoCreateInstance
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if (FAILED(_proc.CoCreateInstance(
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(REFCLSID)CLSID_DirectMusicPerformance,
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NULL,
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CLSCTX_INPROC,
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(REFIID)IID_IDirectMusicPerformance,
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(LPVOID *)&performance))) {
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MSGBOX ("Failed to create the performance object");
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return false;
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}
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// Initialize it
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if (FAILED(performance->Init(NULL, NULL, NULL))) {
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MSGBOX("Failed to initialize performance object");
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return false;
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}
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// Choose default Windows synth
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if (FAILED(performance->AddPort (NULL))) {
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MSGBOX("AddPort failed");
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return false;
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}
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// now we'll create the loader object. This will be used to load the
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// midi file for our demo. Again, we need to use CoCreateInstance
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// and pass the appropriate ID parameters
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if (FAILED(_proc.CoCreateInstance((REFCLSID)CLSID_DirectMusicLoader,
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NULL, CLSCTX_INPROC,
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(REFIID)IID_IDirectMusicLoader,
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(LPVOID *)&loader))) {
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MSGBOX("Failed to create loader object");
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return false;
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}
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// that's it for initialization. If we made it this far we
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// were successful.
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return true;
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}
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// Releases memory used by all of the initialized
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// DirectMusic objects in the program
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void ReleaseSegment (void)
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{
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if (NULL != segment) {
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segment->Release ();
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segment = NULL;
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}
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}
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void ShutdownDirectMusic (void)
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{
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// release everything but the segment, which the performance
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// will release automatically (and it'll crash if it's been
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// released already)
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if (NULL != loader) {
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loader->Release ();
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loader = NULL;
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}
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if (NULL != performance)
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{
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performance->CloseDown ();
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performance->Release ();
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performance = NULL;
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}
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if (COMInitialized) {
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_proc.CoUninitialize();
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COMInitialized = 0;
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}
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}
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// Load MIDI file for playing
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bool LoadMIDI (char *directory, char *filename)
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{
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DMUS_OBJECTDESC obj_desc;
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WCHAR w_directory[_MAX_PATH]; // utf-16 version of the directory name.
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WCHAR w_filename[_MAX_PATH]; // utf-16 version of the file name
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if (NULL == performance)
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return false;
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MULTI_TO_WIDE(w_directory,directory);
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if (FAILED(loader->SetSearchDirectory((REFGUID) GUID_DirectMusicAllTypes,
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w_directory, FALSE))) {
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MSGBOX("LoadMIDI: SetSearchDirectory failed");
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return false;
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}
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// set up the loader object info
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ZeroMemory (&obj_desc, sizeof (obj_desc));
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obj_desc.dwSize = sizeof (obj_desc);
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MULTI_TO_WIDE(w_filename,filename);
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obj_desc.guidClass = CLSID_DirectMusicSegment;
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wcscpy (obj_desc.wszFileName,w_filename);
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obj_desc.dwValidData = DMUS_OBJ_CLASS | DMUS_OBJ_FILENAME;
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// release the existing segment if we have any
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if (NULL != segment)
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ReleaseSegment();
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// and make a new segment
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if (FAILED(loader->GetObject(&obj_desc,
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(REFIID)IID_IDirectMusicSegment,
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(LPVOID *) &segment))) {
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MSGBOX("LoadMIDI: Get object failed");
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return FALSE;
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}
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// next we need to tell the segment what kind of data it contains. We do this
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// with the IDirectMusicSegment::SetParam function.
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if (FAILED(segment->SetParam((REFGUID)GUID_StandardMIDIFile,
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-1, 0, 0, (LPVOID)performance))) {
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MSGBOX("LoadMIDI: SetParam (MIDI file) failed");
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return false;
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}
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// finally, we need to tell the segment to 'download' the instruments
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if (FAILED(segment->SetParam((REFGUID)GUID_Download,
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-1, 0, 0, (LPVOID)performance))) {
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MSGBOX("LoadMIDI: Failed to download instruments");
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return false;
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}
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// at this point, the MIDI file is loaded and ready to play!
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return true;
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}
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// Start playing the MIDI file
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void PlaySegment (void)
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{
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if (NULL == performance)
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return;
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if (FAILED(performance->PlaySegment(segment, 0, 0, NULL))) {
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MSGBOX("PlaySegment failed");
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}
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}
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// Stop playing
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void StopSegment (void)
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{
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if (NULL == performance || NULL == segment)
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return;
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if (FAILED(performance->Stop(segment, NULL, 0, 0))) {
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MSGBOX("StopSegment failed");
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}
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}
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// Find out whether playing has started or stopped
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bool IsSegmentPlaying (void)
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{
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if (NULL == performance || NULL == segment)
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return FALSE;
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// IsPlaying return S_OK if the segment is currently playing
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return performance->IsPlaying(segment, NULL) == S_OK ? TRUE : FALSE;
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}
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void SetVolume(long vol)
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{
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long db;
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if (performance == NULL && !InitDirectMusic())
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return;
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db = ((vol >> 21) & 0x7ff) - 1000;
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performance->SetGlobalParam(GUID_PerfMasterVolume, &db, sizeof(db));
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}
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#if defined(__cplusplus)
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}
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#endif
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#endif // WIN32_ENABLE_DIRECTMUSIC_SUPPORT
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