portaudio.h

Go to the documentation of this file.

#ifndef PORTAUDIO_H
#define PORTAUDIO_H
/*
 * $Id$
 * PortAudio Portable Real-Time Audio Library
 * PortAudio API Header File
 * Latest version available at: http://www.portaudio.com/
 *
 * Copyright (c) 1999-2002 Ross Bencina and Phil Burk
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files
 * (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge,
 * publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

/*
 * The text above constitutes the entire PortAudio license; however,
 * the PortAudio community also makes the following non-binding requests:
 *
 * Any person wishing to distribute modifications to the Software is
 * requested to send the modifications to the original developer so that
 * they can be incorporated into the canonical version. It is also
 * requested that these non-binding requests be included along with the
 * license above.
 */

#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */

int Pa_GetVersion( void );

const char* Pa_GetVersionText( void );

#define paMakeVersionNumber(major, minor, subminor) \
    (((major)&0xFF)<<16 | ((minor)&0xFF)<<8 | ((subminor)&0xFF))


typedef struct PaVersionInfo {
    int versionMajor;
    int versionMinor;
    int versionSubMinor;
    const char *versionControlRevision;
    const char *versionText;
} PaVersionInfo;

const PaVersionInfo* Pa_GetVersionInfo( void );


typedef int PaError;
typedef enum PaErrorCode
{
    paNoError = 0,

    paNotInitialized = -10000,
    paUnanticipatedHostError,
    paInvalidChannelCount,
    paInvalidSampleRate,
    paInvalidDevice,
    paInvalidFlag,
    paSampleFormatNotSupported,
    paBadIODeviceCombination,
    paInsufficientMemory,
    paBufferTooBig,
    paBufferTooSmall,
    paNullCallback,
    paBadStreamPtr,
    paTimedOut,
    paInternalError,
    paDeviceUnavailable,
    paIncompatibleHostApiSpecificStreamInfo,
    paStreamIsStopped,
    paStreamIsNotStopped,
    paInputOverflowed,
    paOutputUnderflowed,
    paHostApiNotFound,
    paInvalidHostApi,
    paCanNotReadFromACallbackStream,
    paCanNotWriteToACallbackStream,
    paCanNotReadFromAnOutputOnlyStream,
    paCanNotWriteToAnInputOnlyStream,
    paIncompatibleStreamHostApi,
    paBadBufferPtr,
    paCanNotInitializeRecursively
} PaErrorCode;


const char *Pa_GetErrorText( PaError errorCode );


PaError Pa_Initialize( void );


PaError Pa_Terminate( void );



typedef int PaDeviceIndex;


#define paNoDevice ((PaDeviceIndex)-1)


#define paUseHostApiSpecificDeviceSpecification ((PaDeviceIndex)-2)


/* Host API enumeration mechanism */

typedef int PaHostApiIndex;


PaHostApiIndex Pa_GetHostApiCount( void );


PaHostApiIndex Pa_GetDefaultHostApi( void );


typedef enum PaHostApiTypeId
{
    paInDevelopment=0, /* use while developing support for a new host API */
    paDirectSound=1,
    paMME=2,
    paASIO=3,
    paSoundManager=4,
    paCoreAudio=5,
    paOSS=7,
    paALSA=8,
    paAL=9,
    paBeOS=10,
    paWDMKS=11,
    paJACK=12,
    paWASAPI=13,
    paAudioScienceHPI=14,
    paAudioIO=15
} PaHostApiTypeId;


typedef struct PaHostApiInfo
{
    int structVersion;
    PaHostApiTypeId type;
    const char *name;

    int deviceCount;

    PaDeviceIndex defaultInputDevice;

    PaDeviceIndex defaultOutputDevice;

} PaHostApiInfo;


const PaHostApiInfo * Pa_GetHostApiInfo( PaHostApiIndex hostApi );


PaHostApiIndex Pa_HostApiTypeIdToHostApiIndex( PaHostApiTypeId type );


PaDeviceIndex Pa_HostApiDeviceIndexToDeviceIndex( PaHostApiIndex hostApi,
        int hostApiDeviceIndex );



typedef struct PaHostErrorInfo{
    PaHostApiTypeId hostApiType;    
    long errorCode;                 
    const char *errorText;          
}PaHostErrorInfo;


const PaHostErrorInfo* Pa_GetLastHostErrorInfo( void );



/* Device enumeration and capabilities */

PaDeviceIndex Pa_GetDeviceCount( void );


PaDeviceIndex Pa_GetDefaultInputDevice( void );


PaDeviceIndex Pa_GetDefaultOutputDevice( void );


typedef double PaTime;


typedef unsigned long PaSampleFormat;


#define paFloat32        ((PaSampleFormat) 0x00000001) 
#define paInt32          ((PaSampleFormat) 0x00000002) 
#define paInt24          ((PaSampleFormat) 0x00000004) 
#define paInt16          ((PaSampleFormat) 0x00000008) 
#define paInt8           ((PaSampleFormat) 0x00000010) 
#define paUInt8          ((PaSampleFormat) 0x00000020) 
#define paCustomFormat   ((PaSampleFormat) 0x00010000) 
#define paNonInterleaved ((PaSampleFormat) 0x80000000) 
typedef struct PaDeviceInfo
{
    int structVersion;  /* this is struct version 2 */
    const char *name;
    PaHostApiIndex hostApi; 
    int maxInputChannels;
    int maxOutputChannels;

    PaTime defaultLowInputLatency;
    PaTime defaultLowOutputLatency;
    PaTime defaultHighInputLatency;
    PaTime defaultHighOutputLatency;

    double defaultSampleRate;
} PaDeviceInfo;


const PaDeviceInfo* Pa_GetDeviceInfo( PaDeviceIndex device );


typedef struct PaStreamParameters
{
    PaDeviceIndex device;

    int channelCount;

    PaSampleFormat sampleFormat;

    PaTime suggestedLatency;

    void *hostApiSpecificStreamInfo;

} PaStreamParameters;


#define paFormatIsSupported (0)

PaError Pa_IsFormatSupported( const PaStreamParameters *inputParameters,
                              const PaStreamParameters *outputParameters,
                              double sampleRate );



/* Streaming types and functions */


typedef void PaStream;


#define paFramesPerBufferUnspecified  (0)


typedef unsigned long PaStreamFlags;

#define   paNoFlag          ((PaStreamFlags) 0)

#define   paClipOff         ((PaStreamFlags) 0x00000001)

#define   paDitherOff       ((PaStreamFlags) 0x00000002)

#define   paNeverDropInput  ((PaStreamFlags) 0x00000004)

#define   paPrimeOutputBuffersUsingStreamCallback ((PaStreamFlags) 0x00000008)

#define   paPlatformSpecificFlags ((PaStreamFlags)0xFFFF0000)

typedef struct PaStreamCallbackTimeInfo{
    PaTime inputBufferAdcTime;  
    PaTime currentTime;         
    PaTime outputBufferDacTime; 
} PaStreamCallbackTimeInfo;


typedef unsigned long PaStreamCallbackFlags;

#define paInputUnderflow   ((PaStreamCallbackFlags) 0x00000001)

#define paInputOverflow    ((PaStreamCallbackFlags) 0x00000002)

#define paOutputUnderflow  ((PaStreamCallbackFlags) 0x00000004)

#define paOutputOverflow   ((PaStreamCallbackFlags) 0x00000008)

#define paPrimingOutput    ((PaStreamCallbackFlags) 0x00000010)

typedef enum PaStreamCallbackResult
{
    paContinue=0,   
    paComplete=1,   
    paAbort=2       
} PaStreamCallbackResult;


typedef int PaStreamCallback(
    const void *input, void *output,
    unsigned long frameCount,
    const PaStreamCallbackTimeInfo* timeInfo,
    PaStreamCallbackFlags statusFlags,
    void *userData );


PaError Pa_OpenStream( PaStream** stream,
                       const PaStreamParameters *inputParameters,
                       const PaStreamParameters *outputParameters,
                       double sampleRate,
                       unsigned long framesPerBuffer,
                       PaStreamFlags streamFlags,
                       PaStreamCallback *streamCallback,
                       void *userData );


PaError Pa_OpenDefaultStream( PaStream** stream,
                              int numInputChannels,
                              int numOutputChannels,
                              PaSampleFormat sampleFormat,
                              double sampleRate,
                              unsigned long framesPerBuffer,
                              PaStreamCallback *streamCallback,
                              void *userData );


PaError Pa_CloseStream( PaStream *stream );


typedef void PaStreamFinishedCallback( void *userData );


PaError Pa_SetStreamFinishedCallback( PaStream *stream, PaStreamFinishedCallback* streamFinishedCallback );


PaError Pa_StartStream( PaStream *stream );


PaError Pa_StopStream( PaStream *stream );


PaError Pa_AbortStream( PaStream *stream );


PaError Pa_IsStreamStopped( PaStream *stream );


PaError Pa_IsStreamActive( PaStream *stream );



typedef struct PaStreamInfo
{
    int structVersion;

    PaTime inputLatency;

    PaTime outputLatency;

    double sampleRate;

} PaStreamInfo;


const PaStreamInfo* Pa_GetStreamInfo( PaStream *stream );


PaTime Pa_GetStreamTime( PaStream *stream );


double Pa_GetStreamCpuLoad( PaStream* stream );


PaError Pa_ReadStream( PaStream* stream,
                       void *buffer,
                       unsigned long frames );


PaError Pa_WriteStream( PaStream* stream,
                        const void *buffer,
                        unsigned long frames );


signed long Pa_GetStreamReadAvailable( PaStream* stream );


signed long Pa_GetStreamWriteAvailable( PaStream* stream );


/* Miscellaneous utilities */


PaError Pa_GetSampleSize( PaSampleFormat format );


void Pa_Sleep( long msec );



#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* PORTAUDIO_H */