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-#ifndef PA_HOST_H
-#define PA_HOST_H
-
-/*
- * $Id: pa_host.h 401 2004-07-23 17:41:54Z jaromil $
- * Host dependant internal API for PortAudio
- *
- * Author: Phil Burk <philburk@softsynth.com>
- *
- * PortAudio Portable Real-Time Audio Library
- * Latest Version at: http://www.softsynth.com/portaudio/
- * DirectSound and Macintosh Implementation
- * Copyright (c) 1999-2000 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.
- *
- * 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.
- *
- * 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.
- *
- */
-
-#include "portaudio.h"
-
-#ifdef __cplusplus
-extern "C"
-{
-#endif /* __cplusplus */
-
-#ifndef SUPPORT_AUDIO_CAPTURE
-#define SUPPORT_AUDIO_CAPTURE (1)
-#endif
-
-#ifndef int32
- typedef long int32;
-#endif
-#ifndef uint32
- typedef unsigned long uint32;
-#endif
-#ifndef int16
- typedef short int16;
-#endif
-#ifndef uint16
- typedef unsigned short uint16;
-#endif
-
-/* Used to convert between various sample formats. */
-typedef void (PortAudioConverter)(
- void *inputBuffer, int inputStride,
- void *outputBuffer, int outputStride,
- int numSamples );
-
-#define PA_MAGIC (0x18273645)
-
-/************************************************************************************/
-/****************** Structures ******************************************************/
-/************************************************************************************/
-
-typedef struct internalPortAudioStream
-{
- uint32 past_Magic; /* ID for struct to catch bugs. */
-
- /* Begin user specified information. */
- uint32 past_FramesPerUserBuffer;
- uint32 past_NumUserBuffers;
- double past_SampleRate; /* Closest supported sample rate. */
- int past_NumInputChannels;
- int past_NumOutputChannels;
- PaDeviceID past_InputDeviceID;
- PaDeviceID past_OutputDeviceID;
- PaSampleFormat past_InputSampleFormat;
- PaSampleFormat past_OutputSampleFormat;
- PortAudioCallback *past_Callback;
- void *past_UserData;
- uint32 past_Flags;
- /* End user specified information. */
-
- void *past_DeviceData;
- PaSampleFormat past_NativeOutputSampleFormat;
- PaSampleFormat past_NativeInputSampleFormat;
-
- /* Flags for communicating between foreground and background. */
- volatile int past_IsActive; /* Background is still playing. */
- volatile int past_StopSoon; /* Background should keep playing when buffers empty. */
- volatile int past_StopNow; /* Background should stop playing now. */
- /* These buffers are used when the native format does not match the user format. */
- void *past_InputBuffer;
- uint32 past_InputBufferSize; /* Size in bytes of the input buffer. */
- void *past_OutputBuffer;
- uint32 past_OutputBufferSize;
- /* Measurements */
- uint32 past_NumCallbacks;
- PaTimestamp past_FrameCount; /* Frames output to buffer. */
- /* For measuring CPU utilization. */
- double past_AverageInsideCount;
- double past_AverageTotalCount;
- double past_Usage;
- int past_IfLastExitValid;
- /* Format Conversion */
- /* These are setup by PaConversion_Setup() */
- PortAudioConverter *past_InputConversionProc;
- int past_InputConversionSourceStride;
- int past_InputConversionTargetStride;
- PortAudioConverter *past_OutputConversionProc;
- int past_OutputConversionSourceStride;
- int past_OutputConversionTargetStride;
-}
-internalPortAudioStream;
-
-/************************************************************************************/
-/******** These functions must be provided by a platform implementation. ************/
-/************************************************************************************/
-
-PaError PaHost_Init( void );
-PaError PaHost_Term( void );
-
-PaError PaHost_OpenStream( internalPortAudioStream *past );
-PaError PaHost_CloseStream( internalPortAudioStream *past );
-
-PaError PaHost_StartOutput( internalPortAudioStream *past );
-PaError PaHost_StopOutput( internalPortAudioStream *past, int abort );
-PaError PaHost_StartInput( internalPortAudioStream *past );
-PaError PaHost_StopInput( internalPortAudioStream *past, int abort );
-PaError PaHost_StartEngine( internalPortAudioStream *past );
-PaError PaHost_StopEngine( internalPortAudioStream *past, int abort );
-PaError PaHost_StreamActive( internalPortAudioStream *past );
-
-void *PaHost_AllocateFastMemory( long numBytes );
-void PaHost_FreeFastMemory( void *addr, long numBytes );
-
-/* This only called if PA_VALIDATE_RATE IS CALLED. */
-PaError PaHost_ValidateSampleRate( PaDeviceID id, double requestedFrameRate,
- double *closestFrameRatePtr );
-
-/**********************************************************************/
-/************ Common Utility Routines provided by PA ******************/
-/**********************************************************************/
-
-/* PaHost_IsInitialized() returns non-zero if PA is initialized, 0 otherwise */
-int PaHost_IsInitialized( void );
-
-internalPortAudioStream* PaHost_GetStreamRepresentation( PortAudioStream *stream );
-
-int PaHost_FindClosestTableEntry( double allowableError, const double *rateTable,
- int numRates, double frameRate );
-
-long Pa_CallConvertInt16( internalPortAudioStream *past,
- short *nativeInputBuffer,
- short *nativeOutputBuffer );
-
-/* Calculate 2 LSB dither signal with a triangular distribution.
-** Ranged properly for adding to a 32 bit 1.31 fixed point value prior to >>15.
-** Range of output is +/- 65535
-** Multiply by PA_DITHER_SCALE to get a float between -2.0 and 2.0. */
-#define PA_DITHER_BITS (15)
-#define PA_DITHER_SCALE (1.0f / ((1<<PA_DITHER_BITS)-1))
-long PaConvert_TriangularDither( void );
-
-PaError PaConvert_SetupInput( internalPortAudioStream *past,
- PaSampleFormat nativeInputSampleFormat );
-
-PaError PaConvert_SetupOutput( internalPortAudioStream *past,
- PaSampleFormat nativeOutputSampleFormat );
-
-long PaConvert_Process( internalPortAudioStream *past,
- void *nativeInputBuffer,
- void *nativeOutputBuffer );
-
-#ifdef __cplusplus
-}
-#endif /* __cplusplus */
-#endif /* PA_HOST_H */