MSTREAM.H

/*========================================================================== 
 * 
 *  Copyright (C) 1995-1997 Microsoft Corporation. All Rights Reserved. 
 * 
 *  File:MStream.h 
 *  Content:Main header file for the MSTREAM sample application 
 * 
 ***************************************************************************/ 
#ifndef __MSTREAM_INCLUDED__ 
#define __MSTREAM_INCLUDED__ 
 
/*****************************************************************************/ 
/* Controls for buffer size, etc. */ 
 
#define TRACK_BUFFER_SIZE1024 
#define OUT_BUFFER_SIZE                 1024 // Max stream buffer size in bytes 
#define BUFFER_TIME_LENGTH60   // Amount to fill in milliseconds 
#define NUM_STREAM_BUFFERS              2 
 
#define DEBUG_CALLBACK_TIMEOUT2000// Wait 2 seconds for callback 
 
/*****************************************************************************/ 
/* A bunch of constants used for calculating position */ 
/* and size of child controls for the main window.    */ 
 
#define BORDER_SPACE_CX10 
#define BORDER_SPACE_CY10 
#define CONTROL_SPACE_CX4 
#define CONTROL_SPACE_CY4 
#define TEXT_SPACE_CY3 
#define TEXT_SPACE_CX2 
 
#define BUTTON_CX68 
#define BUTTON_CY26 
#define CHECK_CX68 
#define CHECK_CY26 
#define BUTTON_SPACE_CX4 
#define BUTTON_SPACE_CY4 
#define CHECK_SPACE_CY4 
 
#define TEMPO_TB_CX150 
#define TEMPO_TB_CY             32 
#define VOL_TB_CX150 
#define VOL_TB_CY               32 
 
#define TEMPO_TEXT_CXTEMPO_TB_CX 
#define VOL_TEXT_CXVOL_TB_CX 
 
#define VOL_TB_MIN0 
#define VOL_TB_MAX1000 
#define VOL_PAGESIZE10 
#define VOL_MIN0 
#define VOL_MAX127 
#define VOL_CACHE_INIT100 
#define TEMPO_MIN1 
#define TEMPO_MAX500 
#define TEMPO_PAGESIZE10 
 
 
#define WM_MSTREAM_PROGRESS(WM_USER + 100) 
#define WM_MSTREAM_UPDATEVOLUME(WM_USER + 101) 
 
/*****************************************************************************/ 
/* All sorts of bit flags and error codes for */ 
/* communicating between various subsystems.  */ 
 
#define MSTREAM_STOPF_NOREOPEN0x0001 
 
#define STREAMF_BUFFER_WARNING0x00000002 
 
#define CONVERTF_RESET0x00000001 
 
#define CONVERTF_STATUS_DONE0x00000001 
#define CONVERTF_STATUS_STUCK0x00000002 
#define CONVERTF_STATUS_GOTEVENT0x00000004 
 
#define CONVERTERR_NOERROR0// No error occured 
#define CONVERTERR_CORRUPT-101// The input file is corrupt 
// The converter has already encountered a corrupt file and cannot convert any 
// more of this file -- you must reset the converter 
#define CONVERTERR_STUCK-102 
#define CONVERTERR_DONE-103// Converter is done 
#define CONVERTERR_BUFFERFULL-104// The buffer is full 
#define CONVERTERR_METASKIP-105// Skipping unknown meta event 
 
#define STATUS_KILLCALLBACK100// Signals that the callback should die 
#define STATUS_CALLBACKDEAD200// Signals callback is done processing 
#define STATUS_WAITINGFOREND300    // Callback's waiting for buffers to play 
 
#define VOLUME_BUFFER3567// Random value which acts as a buffer id 
 
 
#ifdef DEBUG 
#define DebugPrint( sz )        DPF( 3, sz ) 
#else 
#define DebugPrint( sz ) 
#endif 
 
 
 
/* 
 *   This structure is used to pass information to the ConvertToBuffer() 
 * system and then internally by that function to send information about the 
 * target stream buffer and current state of the conversion process to lower 
 * level conversion routines internal to the MSTRCONV module.  See that source 
 * file for specific details. 
 */ 
typedef struct _ConvertInfo 
{ 
    MIDIHDRmhBuffer;    // Standard Windows stream buffer header 
    DWORDdwStartOffset;    // Start offset from mhStreamBuffer.lpStart 
    DWORDdwMaxLength;    // Max length to convert on this pass 
 
    DWORDdwBytesRecorded;    // Used internally by the MSTRCONV module 
    DWORDtkStart;    // Used internally by the MSTRCONV module 
    BOOLbTimesUp;    // Used internally by the MSTRCONV module 
} CONVERTINFO, *LPCONVERTINFO; 
 
 
/*****************************************************************************/ 
/* Function declarations */ 
 
LRESULT CALLBACK MainWindowProc( HWND, unsigned, WPARAM, LPARAM ); 
BOOL CALLBACK DLG_About( HWND, UINT, WPARAM, LPARAM ); 
void CALLBACK MidiProc( HMIDIIN, UINT, DWORD, DWORD, DWORD ); 
 
void BuildTitleBarText( void ); 
void ErrorMessageBox( UINT, DWORD ); 
void HandleTempoScroll( int, int ); 
void HandleVolScroll( int, int ); 
void MidiErrorMessageBox( MMRESULT ); 
void SetAllChannelVolumes( DWORD dwVolumePercent ); 
void SetChannelVolume( DWORD dwChannel, DWORD dwVolumePercent ); 
void UpdateFromControls( void ); 
 
int CreateChildren( RECT ); 
int HandleCommDlgError( DWORD ); 
BOOL StreamBufferSetup( void ); 
 
BOOL ConverterInit( LPSTR szInFile ); 
void ConverterCleanup( void ); 
intConvertToBuffer( DWORD, LPCONVERTINFO ); 
 
#endif /* __MSTREAM_INCLUDED__ */