dmusic.cpp File Reference

Playing music via DirectMusic. More...

#include "../stdafx.h"
#include "../debug.h"
#include "../os/windows/win32.h"
#include "../core/mem_func.hpp"
#include "../thread.h"
#include "../fileio_func.h"
#include "../base_media_base.h"
#include "dmusic.h"
#include "midifile.hpp"
#include "midi.h"
#include <windows.h>
#include <dmksctrl.h>
#include <dmusicc.h>
#include <mutex>
#include "../safeguards.h"

Go to the source code of this file.

Data Structures
struct	DLSFile
	A DLS file. More...
struct	DLSFile::DLSRegion
	An instrument region maps a note range to wave data. More...
struct	DLSFile::DLSInstrument
	Instrument definition read from a DLS file. More...
struct	DLSFile::DLSWave
	Wave data definition from a DLS file. More...
struct	PlaybackSegment

Macros
#define	INITGUID
#define	FOURCC_INFO   mmioFOURCC('I', 'N', 'F', 'O')
#define	FOURCC_fmt   mmioFOURCC('f', 'm', 't', ' ')
#define	FOURCC_data   mmioFOURCC('d', 'a', 't', 'a')

Functions
	PACK_N (struct ChunkHeader { FOURCC type;DWORD length;}, 2)
	A RIFF chunk header.
	PACK_N (struct WAVE_DOWNLOAD { DMUS_DOWNLOADINFO dlInfo;ULONG ulOffsetTable[2];DMUS_WAVE dmWave;DMUS_WAVEDATA dmWaveData;}, 2)
	Buffer format for a DLS wave download.
static uint8_t	ScaleVolume (uint8_t original, uint8_t scale)
static void	TransmitChannelMsg (IDirectMusicBuffer *buffer, REFERENCE_TIME rt, uint8_t status, uint8_t p1, uint8_t p2=0)
static void	TransmitSysex (IDirectMusicBuffer *buffer, REFERENCE_TIME rt, const uint8_t *&msg_start, size_t &remaining)
static void	TransmitStandardSysex (IDirectMusicBuffer *buffer, REFERENCE_TIME rt, MidiSysexMessage msg)
static void	TransmitNotesOff (IDirectMusicBuffer *buffer, REFERENCE_TIME block_time, REFERENCE_TIME cur_time)
	Transmit 'Note off' messages to all MIDI channels.
static void	MidiThreadProc ()
static void *	DownloadArticulationData (int base_offset, void *data, const std::vector< CONNECTION > &artic)
static const char *	LoadDefaultDLSFile (const char *user_dls)

Variables
static const int	MS_TO_REFTIME = 1000 * 10
	DirectMusic time base is 100 ns.
static const int	MIDITIME_TO_REFTIME = 10
	Time base of the midi file reader is 1 us.
struct {
bool   shutdown
	flag to indicate playback thread shutdown
bool   playing
	flag indicating that playback is active
bool   do_start
	flag for starting playback of next_file at next opportunity
bool   do_stop
	flag for stopping playback at next opportunity
int   preload_time
	preload time for music blocks.
uint8_t   new_volume
	volume setting to change to
MidiFile   next_file
	upcoming file to play
PlaybackSegment   next_segment
	segment info for upcoming file
}	_playback
static std::thread	_dmusic_thread
	Handle to our worker thread.
static HANDLE	_thread_event = nullptr
	Event to signal the thread that it should look at a state change.
static std::mutex	_thread_mutex
	Lock access to playback data that is not thread-safe.
static IDirectMusic *	_music = nullptr
	The direct music object manages buffers and ports.
static IDirectMusicPort *	_port = nullptr
	The port object lets us send MIDI data to the synthesizer.
static IDirectMusicBuffer *	_buffer = nullptr
	The buffer object collects the data to sent.
static std::vector< IDirectMusicDownload * >	_dls_downloads
	List of downloaded DLS instruments.
static FMusicDriver_DMusic	iFMusicDriver_DMusic

Detailed Description

Playing music via DirectMusic.

Definition in file dmusic.cpp.