#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"

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.

Data Structures

Macros

Functions

Variables

Detailed Description