mirror of
https://github.com/JGRennison/OpenTTD-patches.git
synced 2024-11-16 00:12:51 +00:00
(svn r2712) Overhaul DirectMusic MIDI backend:
- Merge the .c and .cpp part into one file - Properly deinitialize at the end - Remove "experimental" status - Miscellaneous smaller changes -Fix: Volume control works now
This commit is contained in:
tron
parent
68bd17e351
commit
81be08bc21
7
Makefile
7
Makefile
@ -66,6 +66,7 @@
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# MIDI: if set, it will use it as custom path to midi player.
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# MIDI: if set, it will use it as custom path to midi player.
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# If unset, it will use the hardcoded path in the c code
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# If unset, it will use the hardcoded path in the c code
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# This can still be overriden by the music.extmidi openttd.cfg option.
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# This can still be overriden by the music.extmidi openttd.cfg option.
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# WITH_DIRECTMUSIC: enable DirectMusic MIDI support
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# WITH_NETWORK: enable networking
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# WITH_NETWORK: enable networking
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# DEDICATED: allows compilation on UNIX without SDL. Useful for dedicated servers
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# DEDICATED: allows compilation on UNIX without SDL. Useful for dedicated servers
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#
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#
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@ -118,9 +119,6 @@
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# CC_HOST: the gcc of your localhost if you are making a target that produces incompatible executables
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# CC_HOST: the gcc of your localhost if you are making a target that produces incompatible executables
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# CFLAGS_HOST: cflags used for CC_HOST. Make it something if you are getting errors when you try to compi
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# CFLAGS_HOST: cflags used for CC_HOST. Make it something if you are getting errors when you try to compi
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# windows executables on linux. (just: CFLAGS_HOST:='-I' or something)
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# windows executables on linux. (just: CFLAGS_HOST:='-I' or something)
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#
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# Experimental (does not work properly):
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# WITH_DIRECTMUSIC: enable DirectMusic MIDI support
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##############################################################################
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##############################################################################
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@ -751,8 +749,7 @@ OBJS += winres.o
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endif
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endif
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ifdef WITH_DIRECTMUSIC
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ifdef WITH_DIRECTMUSIC
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C_SOURCES += music/dmusic.c
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CXX_SOURCES += music/dmusic.cpp
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CXX_SOURCES += music/dmusic2.cpp
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endif
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endif
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DEPS = $(OBJS:%.o=.deps/%.d)
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DEPS = $(OBJS:%.o=.deps/%.d)
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@ -27,6 +27,7 @@ $(MAKE_CONFIG):
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$(call CONFIG_LINE,MIDI:=$(MIDI))
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$(call CONFIG_LINE,MIDI:=$(MIDI))
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$(call CONFIG_LINE,MIDI_ARG:=$(MIDI_ARG))
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$(call CONFIG_LINE,MIDI_ARG:=$(MIDI_ARG))
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$(call CONFIG_LINE,SUPRESS_LANG_ERRORS:=$(SUPRESS_LANG_ERRORS))
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$(call CONFIG_LINE,SUPRESS_LANG_ERRORS:=$(SUPRESS_LANG_ERRORS))
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$(call CONFIG_LINE,WITH_DIRECTMUSIC:=$(WITH_DIRECTMUSIC))
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$(call CONFIG_LINE,WITH_NETWORK:=$(WITH_NETWORK))
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$(call CONFIG_LINE,WITH_NETWORK:=$(WITH_NETWORK))
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$(call CONFIG_LINE,DEDICATED:=$(DEDICATED))
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$(call CONFIG_LINE,DEDICATED:=$(DEDICATED))
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$(call CONFIG_LINE,GPMI:=$(GPMI))
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$(call CONFIG_LINE,GPMI:=$(GPMI))
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@ -48,11 +49,6 @@ $(MAKE_CONFIG):
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$(call CONFIG_LINE,CUSTOM_LANG_PATH:=$(CUSTOM_LANG_PATH))
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$(call CONFIG_LINE,CUSTOM_LANG_PATH:=$(CUSTOM_LANG_PATH))
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$(call CONFIG_LINE,)
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$(call CONFIG_LINE,)
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$(call CONFIG_LINE,\# Experimental)
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$(call CONFIG_LINE,WITH_DIRECTMUSIC:=$(WITH_DIRECTMUSIC))
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$(call CONFIG_LINE,)
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$(call CONFIG_LINE,)
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$(call CONFIG_LINE,\# Flag to skip test for OS when building static)
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$(call CONFIG_LINE,\# Flag to skip test for OS when building static)
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$(call CONFIG_LINE,\# OpenTTD have only been succesfully tested with static builds on MorphOS and MacOSX)
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$(call CONFIG_LINE,\# OpenTTD have only been succesfully tested with static builds on MorphOS and MacOSX)
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$(call CONFIG_LINE,\# If you want to try anyway on other OSes, set this flag)
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$(call CONFIG_LINE,\# If you want to try anyway on other OSes, set this flag)
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114
music/dmusic.c
114
music/dmusic.c
@ -1,114 +0,0 @@
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/* $Id$ */
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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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#include "../openttd.h"
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#include "../string.h"
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#include "../variables.h"
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#include "../sound.h"
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#include "dmusic.h"
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static const char * DMusicMidiStart(const char * const *parm);
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static void DMusicMidiStop(void);
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static void DMusicMidiPlaySong(const char *filename);
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static void DMusicMidiStopSong(void);
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static bool DMusicMidiIsSongPlaying(void);
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static void DMusicMidiSetVolume(byte vol);
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const HalMusicDriver _dmusic_midi_driver = {
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DMusicMidiStart,
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DMusicMidiStop,
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DMusicMidiPlaySong,
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DMusicMidiStopSong,
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DMusicMidiIsSongPlaying,
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DMusicMidiSetVolume,
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};
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extern bool LoadMIDI (char *directory, char *filename);
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extern bool InitDirectMusic (void);
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extern void ReleaseSegment (void);
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extern void ShutdownDirectMusic (void);
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extern bool LoadMIDI (char *directory, char *filename);
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extern void PlaySegment (void);
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extern void StopSegment (void);
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extern bool IsSegmentPlaying (void);
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extern void SetVolume (long);
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static bool seeking = false;
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static const char * DMusicMidiStart(const char * const *parm)
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{
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return InitDirectMusic() ? NULL : "Unable to initialize DirectMusic";
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}
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static void DMusicMidiStop(void)
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{
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StopSegment();
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}
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static void DMusicMidiPlaySong(const char *filename)
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{
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char *pos;
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char dir[MAX_PATH];
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char file[MAX_PATH];
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// split full path into directory and file components
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ttd_strlcpy(dir, filename, MAX_PATH);
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pos = strrchr(dir, '\\') + 1;
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ttd_strlcpy(file, pos, MAX_PATH);
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*pos = '\0';
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LoadMIDI(dir, file);
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PlaySegment();
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seeking = true;
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}
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static void DMusicMidiStopSong(void)
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{
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StopSegment();
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}
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static bool DMusicMidiIsSongPlaying(void)
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{
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/* Not the nicest code, but there is a short delay before playing actually
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* starts. OpenTTD makes no provision for this. */
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if (!IsSegmentPlaying() && seeking) return true;
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if (IsSegmentPlaying()) seeking = false;
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return IsSegmentPlaying();
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}
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static void DMusicMidiSetVolume(byte vol)
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{
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SetVolume(vol);
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}
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#endif /* WIN32_ENABLE_DIRECTMUSIC_SUPPORT */
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226
music/dmusic.cpp
Normal file
226
music/dmusic.cpp
Normal file
@ -0,0 +1,226 @@
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/* $Id$ */
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#include "../stdafx.h"
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#ifdef WIN32_ENABLE_DIRECTMUSIC_SUPPORT
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extern "C" {
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#include "../openttd.h"
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#include "../debug.h"
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#include "../win32.h"
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#include "dmusic.h"
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}
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#include <windows.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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// the performance object controls manipulation of the segments
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static IDirectMusicPerformance* performance = NULL;
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// the loader object can load many types of DMusic related files
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static IDirectMusicLoader* loader = NULL;
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// the segment object is where the MIDI data is stored for playback
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static IDirectMusicSegment* segment = NULL;
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static bool seeking = false;
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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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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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static ProcPtrs proc;
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static const char* DMusicMidiStart(const char* const* parm)
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{
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if (performance != NULL) return NULL;
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if (proc.CoCreateInstance == NULL) {
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if (!LoadLibraryList((Function*)&proc, ole_files))
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return "ole32.dll load failed";
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}
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// Initialize COM
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if (FAILED(proc.CoInitialize(NULL))) {
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return "COM initialization failed";
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}
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// create the performance object
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if (FAILED(proc.CoCreateInstance(
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CLSID_DirectMusicPerformance,
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NULL,
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CLSCTX_INPROC,
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IID_IDirectMusicPerformance,
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(LPVOID*)&performance
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))) {
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proc.CoUninitialize();
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return "Failed to create the performance object";
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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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performance->Release();
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performance = NULL;
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proc.CoUninitialize();
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return "Failed to initialize performance object";
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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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performance->CloseDown();
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performance->Release();
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performance = NULL;
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proc.CoUninitialize();
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return "AddPort failed";
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}
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// create the loader object; this will be used to load the MIDI file
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if (FAILED(proc.CoCreateInstance(
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CLSID_DirectMusicLoader,
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NULL,
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CLSCTX_INPROC,
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IID_IDirectMusicLoader,
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(LPVOID*)&loader
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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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proc.CoUninitialize();
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return "Failed to create loader object";
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}
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return NULL;
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}
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static void DMusicMidiStop(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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seeking = false;
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loader->Release();
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loader = NULL;
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performance->CloseDown();
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performance->Release();
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performance = NULL;
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segment = NULL;
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proc.CoUninitialize();
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}
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static void DMusicMidiPlaySong(const char* filename)
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{
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// set up the loader object info
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DMUS_OBJECTDESC obj_desc;
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ZeroMemory(&obj_desc, sizeof(obj_desc));
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obj_desc.dwSize = sizeof(obj_desc);
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obj_desc.guidClass = CLSID_DirectMusicSegment;
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obj_desc.dwValidData = DMUS_OBJ_CLASS | DMUS_OBJ_FILENAME | DMUS_OBJ_FULLPATH;
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MultiByteToWideChar(
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CP_ACP, MB_PRECOMPOSED,
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filename, -1,
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obj_desc.wszFileName, lengthof(obj_desc.wszFileName)
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);
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// release the existing segment if we have any
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if (segment != NULL) {
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segment->Release();
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segment = NULL;
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}
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// make a new segment
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if (FAILED(loader->GetObject(
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&obj_desc, IID_IDirectMusicSegment, (LPVOID*)&segment
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))) {
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DEBUG(misc, 0) ("DirectMusic: Get object failed");
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return;
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}
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// tell the segment what kind of data it contains
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if (FAILED(segment->SetParam(
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GUID_StandardMIDIFile, 0xFFFFFFFF, 0, 0, performance
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))) {
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DEBUG(misc, 0) ("DirectMusic: SetParam (MIDI file) failed");
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return;
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}
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// tell the segment to 'download' the instruments
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if (FAILED(segment->SetParam(GUID_Download, 0xFFFFFFFF, 0, 0, performance))) {
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DEBUG(misc, 0) ("DirectMusic: Failed to download instruments");
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return;
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}
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// start playing the MIDI file
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if (FAILED(performance->PlaySegment(segment, 0, 0, NULL))) {
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DEBUG(misc, 0) ("DirectMusic: PlaySegment failed");
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return;
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}
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seeking = true;
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}
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static void DMusicMidiStopSong(void)
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{
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if (FAILED(performance->Stop(segment, NULL, 0, 0))) {
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DEBUG(misc, 0) ("DirecMusic: StopSegment failed");
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}
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seeking = false;
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}
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static bool DMusicMidiIsSongPlaying(void)
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{
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/* Not the nicest code, but there is a short delay before playing actually
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* starts. OpenTTD makes no provision for this. */
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if (performance->IsPlaying(segment, NULL) == S_OK) {
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seeking = false;
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return true;
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} else {
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return seeking;
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}
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}
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static void DMusicMidiSetVolume(byte vol)
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{
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// 0 - 127 -> -2000 - 0
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long db = vol * 2000 / 127 - 2000;
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performance->SetGlobalParam(GUID_PerfMasterVolume, &db, sizeof(db));
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}
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extern "C" const HalMusicDriver _dmusic_midi_driver = {
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DMusicMidiStart,
|
||||||
|
DMusicMidiStop,
|
||||||
|
DMusicMidiPlaySong,
|
||||||
|
DMusicMidiStopSong,
|
||||||
|
DMusicMidiIsSongPlaying,
|
||||||
|
DMusicMidiSetVolume,
|
||||||
|
};
|
||||||
|
|
||||||
|
#endif
|
||||||
@ -1,313 +0,0 @@
|
|||||||
/* $Id$ */
|
|
||||||
|
|
||||||
/*********************************************************************
|
|
||||||
* OpenTTD: An Open Source Transport Tycoon Deluxe clone *
|
|
||||||
* Copyright (c) 2002-2004 OpenTTD Developers. All Rights Reserved. *
|
|
||||||
* *
|
|
||||||
* Web site: http://openttd.sourceforge.net/ *
|
|
||||||
*********************************************************************/
|
|
||||||
|
|
||||||
/*
|
|
||||||
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
||||||
*/
|
|
||||||
|
|
||||||
/* DirectMusic driver for Win32 */
|
|
||||||
/* Based on dxmci from TTDPatch */
|
|
||||||
|
|
||||||
#include "../stdafx.h"
|
|
||||||
|
|
||||||
#ifdef WIN32_ENABLE_DIRECTMUSIC_SUPPORT
|
|
||||||
|
|
||||||
// for gcc, the GUIDs are available in a library instead
|
|
||||||
#ifndef __GNUC__
|
|
||||||
#define INITGUID
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#ifdef __cplusplus
|
|
||||||
extern "C" {
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#include "../openttd.h"
|
|
||||||
#include "../debug.h"
|
|
||||||
|
|
||||||
#ifdef __cplusplus
|
|
||||||
}
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#include <windows.h>
|
|
||||||
#include <stdio.h>
|
|
||||||
|
|
||||||
#include <dmksctrl.h>
|
|
||||||
#include <dmusici.h>
|
|
||||||
#include <dmusicc.h>
|
|
||||||
#include <dmusicf.h>
|
|
||||||
|
|
||||||
#define MSGBOX(output) DEBUG(misc, 0) ("DirectMusic driver: %s\n", output); //MessageBox(NULL, output, "dxmci",MB_OK);
|
|
||||||
|
|
||||||
static void MultiToWide(WCHAR* to, const char* from)
|
|
||||||
{
|
|
||||||
MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, from, -1, to, _MAX_PATH);
|
|
||||||
}
|
|
||||||
|
|
||||||
// the performance object controls manipulation of the segments
|
|
||||||
static IDirectMusicPerformance *performance = NULL;
|
|
||||||
|
|
||||||
// the segment object is where the MIDI data is stored for playback
|
|
||||||
static IDirectMusicSegment *segment = NULL;
|
|
||||||
|
|
||||||
// the loader bject can load many types of DMusic related files
|
|
||||||
static IDirectMusicLoader *loader = NULL;
|
|
||||||
|
|
||||||
// whether we've initialized COM or not (when deciding whether to shut down)
|
|
||||||
static int COMInitialized = 0;
|
|
||||||
|
|
||||||
|
|
||||||
extern "C" bool LoadLibraryList(void **proc, const char *dll);
|
|
||||||
|
|
||||||
// Use lazy linking
|
|
||||||
struct ProcPtrs {
|
|
||||||
unsigned long (WINAPI *CoCreateInstance)(REFCLSID rclsid, LPUNKNOWN pUnkOuter, DWORD dwClsContext, REFIID riid, LPVOID * ppv);
|
|
||||||
HRESULT (WINAPI *CoInitialize)( LPVOID pvReserved );
|
|
||||||
void (WINAPI *CoUninitialize)( );
|
|
||||||
};
|
|
||||||
|
|
||||||
#define M(x) x "\0"
|
|
||||||
static const char ole_files[] =
|
|
||||||
M("ole32.dll")
|
|
||||||
M("CoCreateInstance")
|
|
||||||
M("CoInitialize")
|
|
||||||
M("CoUninitialize")
|
|
||||||
M("")
|
|
||||||
;
|
|
||||||
#undef M
|
|
||||||
|
|
||||||
|
|
||||||
static ProcPtrs _proc;
|
|
||||||
|
|
||||||
static bool LoadOleDLL(void)
|
|
||||||
{
|
|
||||||
if (_proc.CoCreateInstance != NULL)
|
|
||||||
return true;
|
|
||||||
if (!LoadLibraryList((void**)&_proc, ole_files))
|
|
||||||
return false;
|
|
||||||
return true;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
#ifdef __cplusplus
|
|
||||||
extern "C" {
|
|
||||||
#endif
|
|
||||||
|
|
||||||
// Initialize COM and DirectMusic
|
|
||||||
bool InitDirectMusic(void)
|
|
||||||
{
|
|
||||||
if (NULL != performance)
|
|
||||||
return true;
|
|
||||||
|
|
||||||
// Initialize COM
|
|
||||||
if (!COMInitialized) {
|
|
||||||
if (!LoadOleDLL()) {
|
|
||||||
MSGBOX("ole32.dll load failed");
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
|
|
||||||
_proc.CoInitialize(NULL);
|
|
||||||
COMInitialized = 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Create the performance object via CoCreateInstance
|
|
||||||
if (FAILED(_proc.CoCreateInstance(
|
|
||||||
CLSID_DirectMusicPerformance,
|
|
||||||
NULL,
|
|
||||||
CLSCTX_INPROC,
|
|
||||||
IID_IDirectMusicPerformance,
|
|
||||||
(LPVOID*)&performance
|
|
||||||
))) {
|
|
||||||
MSGBOX("Failed to create the performance object");
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Initialize it
|
|
||||||
if (FAILED(performance->Init(NULL, NULL, NULL))) {
|
|
||||||
MSGBOX("Failed to initialize performance object");
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Choose default Windows synth
|
|
||||||
if (FAILED(performance->AddPort(NULL))) {
|
|
||||||
MSGBOX("AddPort failed");
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
|
|
||||||
// now we'll create the loader object. This will be used to load the
|
|
||||||
// midi file for our demo. Again, we need to use CoCreateInstance
|
|
||||||
// and pass the appropriate ID parameters
|
|
||||||
if (FAILED(_proc.CoCreateInstance(
|
|
||||||
CLSID_DirectMusicLoader,
|
|
||||||
NULL,
|
|
||||||
CLSCTX_INPROC,
|
|
||||||
IID_IDirectMusicLoader,
|
|
||||||
(LPVOID*)&loader
|
|
||||||
))) {
|
|
||||||
MSGBOX("Failed to create loader object");
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
|
|
||||||
// that's it for initialization. If we made it this far we
|
|
||||||
// were successful.
|
|
||||||
return true;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Releases memory used by all of the initialized
|
|
||||||
// DirectMusic objects in the program
|
|
||||||
void ReleaseSegment(void)
|
|
||||||
{
|
|
||||||
if (NULL != segment) {
|
|
||||||
segment->Release();
|
|
||||||
segment = NULL;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
void ShutdownDirectMusic(void)
|
|
||||||
{
|
|
||||||
// release everything but the segment, which the performance
|
|
||||||
// will release automatically (and it'll crash if it's been
|
|
||||||
// released already)
|
|
||||||
|
|
||||||
if (NULL != loader) {
|
|
||||||
loader->Release();
|
|
||||||
loader = NULL;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (NULL != performance) {
|
|
||||||
performance->CloseDown();
|
|
||||||
performance->Release();
|
|
||||||
performance = NULL;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (COMInitialized) {
|
|
||||||
_proc.CoUninitialize();
|
|
||||||
COMInitialized = 0;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
// Load MIDI file for playing
|
|
||||||
bool LoadMIDI(const char *directory, const char *filename)
|
|
||||||
{
|
|
||||||
DMUS_OBJECTDESC obj_desc;
|
|
||||||
WCHAR w_directory[_MAX_PATH]; // utf-16 version of the directory name.
|
|
||||||
WCHAR w_filename[_MAX_PATH]; // utf-16 version of the file name
|
|
||||||
|
|
||||||
if (NULL == performance)
|
|
||||||
return false;
|
|
||||||
|
|
||||||
MultiToWide(w_directory, directory);
|
|
||||||
|
|
||||||
if (FAILED(loader->SetSearchDirectory(
|
|
||||||
GUID_DirectMusicAllTypes, w_directory, FALSE
|
|
||||||
))) {
|
|
||||||
MSGBOX("LoadMIDI: SetSearchDirectory failed");
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
|
|
||||||
// set up the loader object info
|
|
||||||
ZeroMemory(&obj_desc, sizeof(obj_desc));
|
|
||||||
obj_desc.dwSize = sizeof(obj_desc);
|
|
||||||
|
|
||||||
MultiToWide(w_filename, filename);
|
|
||||||
obj_desc.guidClass = CLSID_DirectMusicSegment;
|
|
||||||
|
|
||||||
wcscpy(obj_desc.wszFileName, w_filename);
|
|
||||||
obj_desc.dwValidData = DMUS_OBJ_CLASS | DMUS_OBJ_FILENAME;
|
|
||||||
|
|
||||||
// release the existing segment if we have any
|
|
||||||
if (NULL != segment)
|
|
||||||
ReleaseSegment();
|
|
||||||
|
|
||||||
// and make a new segment
|
|
||||||
if (FAILED(loader->GetObject(
|
|
||||||
&obj_desc, IID_IDirectMusicSegment, (LPVOID*)&segment
|
|
||||||
))) {
|
|
||||||
MSGBOX("LoadMIDI: Get object failed");
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
|
|
||||||
// next we need to tell the segment what kind of data it contains. We do this
|
|
||||||
// with the IDirectMusicSegment::SetParam function.
|
|
||||||
if (FAILED(segment->SetParam(
|
|
||||||
GUID_StandardMIDIFile, 0xFFFFFFFF, 0, 0, performance
|
|
||||||
))) {
|
|
||||||
MSGBOX("LoadMIDI: SetParam (MIDI file) failed");
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
|
|
||||||
// finally, we need to tell the segment to 'download' the instruments
|
|
||||||
if (FAILED(segment->SetParam(GUID_Download, 0xFFFFFFFF, 0, 0, performance))) {
|
|
||||||
MSGBOX("LoadMIDI: Failed to download instruments");
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
|
|
||||||
// at this point, the MIDI file is loaded and ready to play!
|
|
||||||
return true;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Start playing the MIDI file
|
|
||||||
void PlaySegment(void)
|
|
||||||
{
|
|
||||||
if (NULL == performance)
|
|
||||||
return;
|
|
||||||
|
|
||||||
if (FAILED(performance->PlaySegment(segment, 0, 0, NULL))) {
|
|
||||||
MSGBOX("PlaySegment failed");
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
// Stop playing
|
|
||||||
void StopSegment(void)
|
|
||||||
{
|
|
||||||
if (NULL == performance || NULL == segment)
|
|
||||||
return;
|
|
||||||
|
|
||||||
if (FAILED(performance->Stop(segment, NULL, 0, 0))) {
|
|
||||||
MSGBOX("StopSegment failed");
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
// Find out whether playing has started or stopped
|
|
||||||
bool IsSegmentPlaying(void)
|
|
||||||
{
|
|
||||||
if (NULL == performance || NULL == segment)
|
|
||||||
return false;
|
|
||||||
|
|
||||||
// IsPlaying return S_OK if the segment is currently playing
|
|
||||||
return performance->IsPlaying(segment, NULL) == S_OK;
|
|
||||||
}
|
|
||||||
|
|
||||||
void SetVolume(long vol)
|
|
||||||
{
|
|
||||||
long db;
|
|
||||||
|
|
||||||
if (performance == NULL && !InitDirectMusic())
|
|
||||||
return;
|
|
||||||
|
|
||||||
db = ((vol >> 21) & 0x7ff) - 1000;
|
|
||||||
performance->SetGlobalParam(GUID_PerfMasterVolume, &db, sizeof(db));
|
|
||||||
}
|
|
||||||
|
|
||||||
#if defined(__cplusplus)
|
|
||||||
}
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#endif /* WIN32_ENABLE_DIRECTMUSIC_SUPPORT */
|
|
||||||
Loading…
Reference in New Issue
Block a user