PerformSound.h

/*
  $Id: PerformSound.h 3449 2009-04-04 16:52:47Z leighsmith $
  Description:
    This is basically a bare-bones duplicate of NeXT/Apples' performsound module
    functionality using the PortAudio library. Compilable with VC++
    6.0 or MinGW and typically for interface with Objective C
    routines, in particular, the SndKit.

    Only C functions are exported to avoid different C++ name mangling between VC++ and gcc

  Original Author: Leigh Smith <leigh@leighsmith.com>

  Copyright (C) 1999 Permission is granted to use this code for commercial and
  non-commercial purposes so long as this copyright statement (noting the author) is
  preserved.
*/

#ifndef __PERFORMSOUND__
#define __PERFORMSOUND__

/* We #include this file regardless of the setting of
   HAVE_CONFIG_H so that other applications compiling against this
   header don't have to define it. If you are seeing errors for
   MKPerformSndMIDIConfig.h not found, you haven't run ./configure 
 */
#include "MKPerformSndMIDIConfig.h"
#include <objc/objc.h> // for BOOL

/* these don't seem to be defined anywhere standard - probably they
   are in GnuStep */
#ifndef FALSE
#define FALSE 0
#define TRUE !(FALSE)
#endif

#if STDC_HEADERS
# include <stdlib.h> // for NULL definition
#endif
#include "SndStruct.h"
#include "SndFormats.h"

#define MKPERFORMSND_USE_STREAMING       1  // Uses the newer streaming API

#ifdef __cplusplus
extern "C" {
#endif 

typedef struct SNDStreamBuffer {
    SndSampleFormat dataFormat;
    long frameCount;
    int channelCount;
    double sampleRate;
    void *streamData;
} SNDStreamBuffer;

typedef void (*SNDStreamProcessor)(double sampleTime, SNDStreamBuffer *inStream, SNDStreamBuffer *outStream, void *userData);

PERFORM_API BOOL SNDInit(BOOL guessTheDevice);

PERFORM_API BOOL SNDTerminate(void);

PERFORM_API char **SNDGetAvailableDriverNames(void);

PERFORM_API BOOL SNDSetDriverIndex(unsigned int selectedIndex);

PERFORM_API unsigned int SNDGetAssignedDriverIndex(void);

PERFORM_API BOOL SNDIsMuted(void);

PERFORM_API void SNDSetMute(BOOL aFlag);

PERFORM_API BOOL SNDSetBufferSizeInBytes(long liBufferSizeInBytes);

PERFORM_API void SNDStreamNativeFormat(SNDStreamBuffer *streamFormat,
                                       BOOL isOutputStream);

PERFORM_API BOOL SNDStreamStart(SNDStreamProcessor newStreamProcessor, void *userData);

PERFORM_API BOOL SNDStreamStop(void);

PERFORM_API const char **SNDSpeakerConfiguration(void);

#ifdef __cplusplus
}
#endif

#endif

---