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2093 lines
76 KiB
2093 lines
76 KiB
--- a/src/portaudio.h
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+++ /dev/null
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@@ -1,466 +0,0 @@
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-// NOTE: Copy this file to portaudio.h in order to compile with V18 portaudio
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-
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-
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-#ifndef PORT_AUDIO_H
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-#define PORT_AUDIO_H
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-
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-#ifdef __cplusplus
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-extern "C"
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-{
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-#endif /* __cplusplus */
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-
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-/*
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- * $Id: portaudio.h,v 1.5 2002/03/26 18:04:22 philburk Exp $
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- * PortAudio Portable Real-Time Audio Library
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- * PortAudio API Header File
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- * Latest version available at: http://www.audiomulch.com/portaudio/
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- *
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- * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
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- *
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- * Permission is hereby granted, free of charge, to any person obtaining
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- * a copy of this software and associated documentation files
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- * (the "Software"), to deal in the Software without restriction,
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- * including without limitation the rights to use, copy, modify, merge,
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- * publish, distribute, sublicense, and/or sell copies of the Software,
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- * and to permit persons to whom the Software is furnished to do so,
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- * subject to the following conditions:
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- *
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- * The above copyright notice and this permission notice shall be
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- * included in all copies or substantial portions of the Software.
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- *
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- * Any person wishing to distribute modifications to the Software is
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- * requested to send the modifications to the original developer so that
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- * they can be incorporated into the canonical version.
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- *
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- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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- * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
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- * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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- * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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- *
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- */
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-
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-typedef int PaError;
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-typedef enum {
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- paNoError = 0,
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-
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- paHostError = -10000,
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- paInvalidChannelCount,
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- paInvalidSampleRate,
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- paInvalidDeviceId,
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- paInvalidFlag,
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- paSampleFormatNotSupported,
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- paBadIODeviceCombination,
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- paInsufficientMemory,
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- paBufferTooBig,
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- paBufferTooSmall,
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- paNullCallback,
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- paBadStreamPtr,
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- paTimedOut,
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- paInternalError,
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- paDeviceUnavailable
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-} PaErrorNum;
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-
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-/*
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- Pa_Initialize() is the library initialisation function - call this before
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- using the library.
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-
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-*/
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-
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-PaError Pa_Initialize( void );
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-
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-/*
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- Pa_Terminate() is the library termination function - call this after
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- using the library.
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-
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-*/
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-
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-PaError Pa_Terminate( void );
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-
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-/*
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- Pa_GetHostError() returns a host specific error code.
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- This can be called after receiving a PortAudio error code of paHostError.
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-
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-*/
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-
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-long Pa_GetHostError( void );
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-
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-/*
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- Pa_GetErrorText() translates the supplied PortAudio error number
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- into a human readable message.
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-
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-*/
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-
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-const char *Pa_GetErrorText( PaError errnum );
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-
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-/*
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- Sample formats
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-
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- These are formats used to pass sound data between the callback and the
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- stream. Each device has a "native" format which may be used when optimum
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- efficiency or control over conversion is required.
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-
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- Formats marked "always available" are supported (emulated) by all
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- PortAudio implementations.
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-
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- The floating point representation (paFloat32) uses +1.0 and -1.0 as the
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- maximum and minimum respectively.
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-
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- paUInt8 is an unsigned 8 bit format where 128 is considered "ground"
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-
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-*/
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-
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-typedef unsigned long PaSampleFormat;
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-#define paFloat32 ((PaSampleFormat) (1<<0)) /*always available*/
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-#define paInt16 ((PaSampleFormat) (1<<1)) /*always available*/
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-#define paInt32 ((PaSampleFormat) (1<<2)) /*always available*/
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-#define paInt24 ((PaSampleFormat) (1<<3))
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-#define paPackedInt24 ((PaSampleFormat) (1<<4))
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-#define paInt8 ((PaSampleFormat) (1<<5))
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-#define paUInt8 ((PaSampleFormat) (1<<6))
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-#define paCustomFormat ((PaSampleFormat) (1<<16))
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-
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-/*
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- Device enumeration mechanism.
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-
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- Device ids range from 0 to Pa_CountDevices()-1.
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-
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- Devices may support input, output or both.
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-
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-*/
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-
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-typedef int PaDeviceID;
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-#define paNoDevice -1
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-
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-int Pa_CountDevices( void );
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-
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-typedef struct
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-{
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- int structVersion;
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- const char *name;
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- int maxInputChannels;
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- int maxOutputChannels;
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- /* Number of discrete rates, or -1 if range supported. */
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- int numSampleRates;
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- /* Array of supported sample rates, or {min,max} if range supported. */
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- const double *sampleRates;
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- PaSampleFormat nativeSampleFormats;
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-}
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-PaDeviceInfo;
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-
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-/*
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- Pa_GetDefaultInputDeviceID(), Pa_GetDefaultOutputDeviceID() return the
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- default device ids for input and output respectively, or paNoDevice if
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- no device is available.
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- The result can be passed to Pa_OpenStream().
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-
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- On the PC, the user can specify a default device by
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- setting an environment variable. For example, to use device #1.
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-
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- set PA_RECOMMENDED_OUTPUT_DEVICE=1
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-
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- The user should first determine the available device ids by using
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- the supplied application "pa_devs".
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-
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-*/
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-
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-PaDeviceID Pa_GetDefaultInputDeviceID( void );
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-PaDeviceID Pa_GetDefaultOutputDeviceID( void );
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-
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-
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-
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-/*
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- Pa_GetDeviceInfo() returns a pointer to an immutable PaDeviceInfo structure
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- for the device specified.
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- If the device parameter is out of range the function returns NULL.
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-
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- PortAudio manages the memory referenced by the returned pointer, the client
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- must not manipulate or free the memory. The pointer is only guaranteed to be
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- valid between calls to Pa_Initialize() and Pa_Terminate().
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-
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-*/
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-
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-const PaDeviceInfo* Pa_GetDeviceInfo( PaDeviceID device );
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-
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-/*
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- PaTimestamp is used to represent a continuous sample clock with arbitrary
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- start time that can be used for syncronization. The type is used for the
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- outTime argument to the PortAudioCallback and as the result of Pa_StreamTime()
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-
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-*/
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-
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-typedef double PaTimestamp;
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-
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-/*
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- PortAudioCallback is implemented by PortAudio clients.
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-
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- inputBuffer and outputBuffer are arrays of interleaved samples,
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- the format, packing and number of channels used by the buffers are
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- determined by parameters to Pa_OpenStream() (see below).
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-
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- framesPerBuffer is the number of sample frames to be processed by the callback.
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-
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- outTime is the time in samples when the buffer(s) processed by
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- this callback will begin being played at the audio output.
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- See also Pa_StreamTime()
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-
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- userData is the value of a user supplied pointer passed to Pa_OpenStream()
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- intended for storing synthesis data etc.
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-
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- return value:
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- The callback can return a non-zero value to stop the stream. This may be
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- useful in applications such as soundfile players where a specific duration
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- of output is required. However, it is not necessary to utilise this mechanism
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- as StopStream() will also terminate the stream. A callback returning a
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- non-zero value must fill the entire outputBuffer.
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-
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- NOTE: None of the other stream functions may be called from within the
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- callback function except for Pa_GetCPULoad().
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-
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-*/
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-
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-typedef int (PortAudioCallback)(
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- void *inputBuffer, void *outputBuffer,
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- unsigned long framesPerBuffer,
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- PaTimestamp outTime, void *userData );
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-
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-
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-/*
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- Stream flags
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-
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- These flags may be supplied (ored together) in the streamFlags argument to
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- the Pa_OpenStream() function.
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-
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-*/
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-
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-#define paNoFlag (0)
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-#define paClipOff (1<<0) /* disable default clipping of out of range samples */
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-#define paDitherOff (1<<1) /* disable default dithering */
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-#define paPlatformSpecificFlags (0x00010000)
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-typedef unsigned long PaStreamFlags;
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-
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-/*
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- A single PortAudioStream provides multiple channels of real-time
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- input and output audio streaming to a client application.
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- Pointers to PortAudioStream objects are passed between PortAudio functions.
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-*/
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-
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-typedef void PortAudioStream;
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-#define PaStream PortAudioStream
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-
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-/*
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- Pa_OpenStream() opens a stream for either input, output or both.
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-
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- stream is the address of a PortAudioStream pointer which will receive
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- a pointer to the newly opened stream.
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-
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- inputDevice is the id of the device used for input (see PaDeviceID above.)
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- inputDevice may be paNoDevice to indicate that an input device is not required.
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-
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- numInputChannels is the number of channels of sound to be delivered to the
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- callback. It can range from 1 to the value of maxInputChannels in the
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- PaDeviceInfo record for the device specified by the inputDevice parameter.
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- If inputDevice is paNoDevice numInputChannels is ignored.
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-
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- inputSampleFormat is the sample format of inputBuffer provided to the callback
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- function. inputSampleFormat may be any of the formats described by the
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- PaSampleFormat enumeration (see above). PortAudio guarantees support for
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- the device's native formats (nativeSampleFormats in the device info record)
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- and additionally 16 and 32 bit integer and 32 bit floating point formats.
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- Support for other formats is implementation defined.
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-
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- inputDriverInfo is a pointer to an optional driver specific data structure
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- containing additional information for device setup or stream processing.
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- inputDriverInfo is never required for correct operation. If not used
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- inputDriverInfo should be NULL.
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-
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- outputDevice is the id of the device used for output (see PaDeviceID above.)
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- outputDevice may be paNoDevice to indicate that an output device is not required.
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-
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- numOutputChannels is the number of channels of sound to be supplied by the
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- callback. See the definition of numInputChannels above for more details.
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-
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- outputSampleFormat is the sample format of the outputBuffer filled by the
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- callback function. See the definition of inputSampleFormat above for more
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- details.
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-
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- outputDriverInfo is a pointer to an optional driver specific data structure
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- containing additional information for device setup or stream processing.
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- outputDriverInfo is never required for correct operation. If not used
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- outputDriverInfo should be NULL.
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-
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- sampleRate is the desired sampleRate. For full-duplex streams it is the
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- sample rate for both input and output
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-
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- framesPerBuffer is the length in sample frames of all internal sample buffers
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- used for communication with platform specific audio routines. Wherever
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- possible this corresponds to the framesPerBuffer parameter passed to the
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- callback function.
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-
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- numberOfBuffers is the number of buffers used for multibuffered communication
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- with the platform specific audio routines. If you pass zero, then an optimum
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- value will be chosen for you internally. This parameter is provided only
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- as a guide - and does not imply that an implementation must use multibuffered
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- i/o when reliable double buffering is available (such as SndPlayDoubleBuffer()
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- on the Macintosh.)
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-
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- streamFlags may contain a combination of flags ORed together.
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- These flags modify the behaviour of the streaming process. Some flags may only
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- be relevant to certain buffer formats.
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-
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- callback is a pointer to a client supplied function that is responsible
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- for processing and filling input and output buffers (see above for details.)
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-
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- userData is a client supplied pointer which is passed to the callback
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- function. It could for example, contain a pointer to instance data necessary
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- for processing the audio buffers.
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-
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- return value:
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- Upon success Pa_OpenStream() returns PaNoError and places a pointer to a
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- valid PortAudioStream in the stream argument. The stream is inactive (stopped).
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- If a call to Pa_OpenStream() fails a non-zero error code is returned (see
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- PaError above) and the value of stream is invalid.
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-
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-*/
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-
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-PaError Pa_OpenStream( PortAudioStream** stream,
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- PaDeviceID inputDevice,
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- int numInputChannels,
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- PaSampleFormat inputSampleFormat,
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- void *inputDriverInfo,
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- PaDeviceID outputDevice,
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- int numOutputChannels,
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- PaSampleFormat outputSampleFormat,
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- void *outputDriverInfo,
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- double sampleRate,
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- unsigned long framesPerBuffer,
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- unsigned long numberOfBuffers,
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- PaStreamFlags streamFlags,
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- PortAudioCallback *callback,
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- void *userData );
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-
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-
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-/*
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- Pa_OpenDefaultStream() is a simplified version of Pa_OpenStream() that opens
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- the default input and/or output devices. Most parameters have identical meaning
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- to their Pa_OpenStream() counterparts, with the following exceptions:
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-
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- If either numInputChannels or numOutputChannels is 0 the respective device
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- is not opened. This has the same effect as passing paNoDevice in the device
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- arguments to Pa_OpenStream().
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-
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- sampleFormat applies to both the input and output buffers.
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-
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-*/
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-
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-PaError Pa_OpenDefaultStream( PortAudioStream** stream,
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- int numInputChannels,
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- int numOutputChannels,
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- PaSampleFormat sampleFormat,
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- double sampleRate,
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- unsigned long framesPerBuffer,
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- unsigned long numberOfBuffers,
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- PortAudioCallback *callback,
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- void *userData );
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-
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-/*
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- Pa_CloseStream() closes an audio stream, flushing any pending buffers.
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-
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-*/
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-
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-PaError Pa_CloseStream( PortAudioStream* );
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-
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-/*
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- Pa_StartStream() and Pa_StopStream() begin and terminate audio processing.
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- Pa_StopStream() waits until all pending audio buffers have been played.
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- Pa_AbortStream() stops playing immediately without waiting for pending
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- buffers to complete.
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-
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-*/
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-
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-PaError Pa_StartStream( PortAudioStream *stream );
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-
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-PaError Pa_StopStream( PortAudioStream *stream );
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-
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-PaError Pa_AbortStream( PortAudioStream *stream );
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-
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-/*
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- Pa_StreamActive() returns one (1) when the stream is active (ie playing
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- or recording audio), zero (0) when not playing, or a negative error number
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- if the stream is invalid.
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- The stream is active between calls to Pa_StartStream() and Pa_StopStream(),
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- but may also become inactive if the callback returns a non-zero value.
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- In the latter case, the stream is considered inactive after the last
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- buffer has finished playing.
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-
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-*/
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-
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-PaError Pa_StreamActive( PortAudioStream *stream );
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-
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-/*
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- Pa_StreamTime() returns the current output time in samples for the stream.
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- This time may be used as a time reference (for example synchronizing audio to
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- MIDI).
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-
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-*/
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-
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-PaTimestamp Pa_StreamTime( PortAudioStream *stream );
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-
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-/*
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- Pa_GetCPULoad() returns the CPU Load for the stream.
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- The "CPU Load" is a fraction of total CPU time consumed by the stream's
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- audio processing routines including, but not limited to the client supplied
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- callback.
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- A value of 0.5 would imply that PortAudio and the sound generating
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- callback was consuming roughly 50% of the available CPU time.
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- This function may be called from the callback function or the application.
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-
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-*/
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-
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-double Pa_GetCPULoad( PortAudioStream* stream );
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-
|
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-/*
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|
- Pa_GetMinNumBuffers() returns the minimum number of buffers required by
|
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- the current host based on minimum latency.
|
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- On the PC, for the DirectSound implementation, latency can be optionally set
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- by user by setting an environment variable.
|
|
- For example, to set latency to 200 msec, put:
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-
|
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- set PA_MIN_LATENCY_MSEC=200
|
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-
|
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- in the AUTOEXEC.BAT file and reboot.
|
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- If the environment variable is not set, then the latency will be determined
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- based on the OS. Windows NT has higher latency than Win95.
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-
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-*/
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-
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-int Pa_GetMinNumBuffers( int framesPerBuffer, double sampleRate );
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-
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-/*
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|
- Pa_Sleep() puts the caller to sleep for at least 'msec' milliseconds.
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- You may sleep longer than the requested time so don't rely on this for
|
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- accurate musical timing.
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-
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- Pa_Sleep() is provided as a convenience for authors of portable code (such as
|
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- the tests and examples in the PortAudio distribution.)
|
|
-
|
|
-*/
|
|
-
|
|
-void Pa_Sleep( long msec );
|
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-
|
|
-/*
|
|
- Pa_GetSampleSize() returns the size in bytes of a single sample in the
|
|
- supplied PaSampleFormat, or paSampleFormatNotSupported if the format is
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- no supported.
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-
|
|
-*/
|
|
-
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|
-PaError Pa_GetSampleSize( PaSampleFormat format );
|
|
-
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|
-
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|
-#ifdef __cplusplus
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|
-}
|
|
-#endif /* __cplusplus */
|
|
-#endif /* PORT_AUDIO_H */
|
|
--- a/src/portaudio18.h
|
|
+++ /dev/null
|
|
@@ -1,466 +0,0 @@
|
|
-// NOTE: Copy this file to portaudio.h in order to compile with V18 portaudio
|
|
-
|
|
-
|
|
-#ifndef PORT_AUDIO_H
|
|
-#define PORT_AUDIO_H
|
|
-
|
|
-#ifdef __cplusplus
|
|
-extern "C"
|
|
-{
|
|
-#endif /* __cplusplus */
|
|
-
|
|
-/*
|
|
- * $Id: portaudio.h,v 1.5 2002/03/26 18:04:22 philburk Exp $
|
|
- * PortAudio Portable Real-Time Audio Library
|
|
- * PortAudio API Header File
|
|
- * Latest version available at: http://www.audiomulch.com/portaudio/
|
|
- *
|
|
- * Copyright (c) 1999-2000 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.
|
|
- *
|
|
- * 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.
|
|
- *
|
|
- */
|
|
-
|
|
-typedef int PaError;
|
|
-typedef enum {
|
|
- paNoError = 0,
|
|
-
|
|
- paHostError = -10000,
|
|
- paInvalidChannelCount,
|
|
- paInvalidSampleRate,
|
|
- paInvalidDeviceId,
|
|
- paInvalidFlag,
|
|
- paSampleFormatNotSupported,
|
|
- paBadIODeviceCombination,
|
|
- paInsufficientMemory,
|
|
- paBufferTooBig,
|
|
- paBufferTooSmall,
|
|
- paNullCallback,
|
|
- paBadStreamPtr,
|
|
- paTimedOut,
|
|
- paInternalError,
|
|
- paDeviceUnavailable
|
|
-} PaErrorNum;
|
|
-
|
|
-/*
|
|
- Pa_Initialize() is the library initialisation function - call this before
|
|
- using the library.
|
|
-
|
|
-*/
|
|
-
|
|
-PaError Pa_Initialize( void );
|
|
-
|
|
-/*
|
|
- Pa_Terminate() is the library termination function - call this after
|
|
- using the library.
|
|
-
|
|
-*/
|
|
-
|
|
-PaError Pa_Terminate( void );
|
|
-
|
|
-/*
|
|
- Pa_GetHostError() returns a host specific error code.
|
|
- This can be called after receiving a PortAudio error code of paHostError.
|
|
-
|
|
-*/
|
|
-
|
|
-long Pa_GetHostError( void );
|
|
-
|
|
-/*
|
|
- Pa_GetErrorText() translates the supplied PortAudio error number
|
|
- into a human readable message.
|
|
-
|
|
-*/
|
|
-
|
|
-const char *Pa_GetErrorText( PaError errnum );
|
|
-
|
|
-/*
|
|
- Sample formats
|
|
-
|
|
- These are formats used to pass sound data between the callback and the
|
|
- stream. Each device has a "native" format which may be used when optimum
|
|
- efficiency or control over conversion is required.
|
|
-
|
|
- Formats marked "always available" are supported (emulated) by all
|
|
- PortAudio implementations.
|
|
-
|
|
- The floating point representation (paFloat32) uses +1.0 and -1.0 as the
|
|
- maximum and minimum respectively.
|
|
-
|
|
- paUInt8 is an unsigned 8 bit format where 128 is considered "ground"
|
|
-
|
|
-*/
|
|
-
|
|
-typedef unsigned long PaSampleFormat;
|
|
-#define paFloat32 ((PaSampleFormat) (1<<0)) /*always available*/
|
|
-#define paInt16 ((PaSampleFormat) (1<<1)) /*always available*/
|
|
-#define paInt32 ((PaSampleFormat) (1<<2)) /*always available*/
|
|
-#define paInt24 ((PaSampleFormat) (1<<3))
|
|
-#define paPackedInt24 ((PaSampleFormat) (1<<4))
|
|
-#define paInt8 ((PaSampleFormat) (1<<5))
|
|
-#define paUInt8 ((PaSampleFormat) (1<<6))
|
|
-#define paCustomFormat ((PaSampleFormat) (1<<16))
|
|
-
|
|
-/*
|
|
- Device enumeration mechanism.
|
|
-
|
|
- Device ids range from 0 to Pa_CountDevices()-1.
|
|
-
|
|
- Devices may support input, output or both.
|
|
-
|
|
-*/
|
|
-
|
|
-typedef int PaDeviceID;
|
|
-#define paNoDevice -1
|
|
-
|
|
-int Pa_CountDevices( void );
|
|
-
|
|
-typedef struct
|
|
-{
|
|
- int structVersion;
|
|
- const char *name;
|
|
- int maxInputChannels;
|
|
- int maxOutputChannels;
|
|
- /* Number of discrete rates, or -1 if range supported. */
|
|
- int numSampleRates;
|
|
- /* Array of supported sample rates, or {min,max} if range supported. */
|
|
- const double *sampleRates;
|
|
- PaSampleFormat nativeSampleFormats;
|
|
-}
|
|
-PaDeviceInfo;
|
|
-
|
|
-/*
|
|
- Pa_GetDefaultInputDeviceID(), Pa_GetDefaultOutputDeviceID() return the
|
|
- default device ids for input and output respectively, or paNoDevice if
|
|
- no device is available.
|
|
- The result can be passed to Pa_OpenStream().
|
|
-
|
|
- On the PC, the user can specify a default device by
|
|
- setting an environment variable. For example, to use device #1.
|
|
-
|
|
- set PA_RECOMMENDED_OUTPUT_DEVICE=1
|
|
-
|
|
- The user should first determine the available device ids by using
|
|
- the supplied application "pa_devs".
|
|
-
|
|
-*/
|
|
-
|
|
-PaDeviceID Pa_GetDefaultInputDeviceID( void );
|
|
-PaDeviceID Pa_GetDefaultOutputDeviceID( void );
|
|
-
|
|
-
|
|
-
|
|
-/*
|
|
- Pa_GetDeviceInfo() returns a pointer to an immutable PaDeviceInfo structure
|
|
- for the device specified.
|
|
- If the device parameter is out of range the function returns NULL.
|
|
-
|
|
- PortAudio manages the memory referenced by the returned pointer, the client
|
|
- must not manipulate or free the memory. The pointer is only guaranteed to be
|
|
- valid between calls to Pa_Initialize() and Pa_Terminate().
|
|
-
|
|
-*/
|
|
-
|
|
-const PaDeviceInfo* Pa_GetDeviceInfo( PaDeviceID device );
|
|
-
|
|
-/*
|
|
- PaTimestamp is used to represent a continuous sample clock with arbitrary
|
|
- start time that can be used for syncronization. The type is used for the
|
|
- outTime argument to the PortAudioCallback and as the result of Pa_StreamTime()
|
|
-
|
|
-*/
|
|
-
|
|
-typedef double PaTimestamp;
|
|
-
|
|
-/*
|
|
- PortAudioCallback is implemented by PortAudio clients.
|
|
-
|
|
- inputBuffer and outputBuffer are arrays of interleaved samples,
|
|
- the format, packing and number of channels used by the buffers are
|
|
- determined by parameters to Pa_OpenStream() (see below).
|
|
-
|
|
- framesPerBuffer is the number of sample frames to be processed by the callback.
|
|
-
|
|
- outTime is the time in samples when the buffer(s) processed by
|
|
- this callback will begin being played at the audio output.
|
|
- See also Pa_StreamTime()
|
|
-
|
|
- userData is the value of a user supplied pointer passed to Pa_OpenStream()
|
|
- intended for storing synthesis data etc.
|
|
-
|
|
- return value:
|
|
- The callback can return a non-zero value to stop the stream. This may be
|
|
- useful in applications such as soundfile players where a specific duration
|
|
- of output is required. However, it is not necessary to utilise this mechanism
|
|
- as StopStream() will also terminate the stream. A callback returning a
|
|
- non-zero value must fill the entire outputBuffer.
|
|
-
|
|
- NOTE: None of the other stream functions may be called from within the
|
|
- callback function except for Pa_GetCPULoad().
|
|
-
|
|
-*/
|
|
-
|
|
-typedef int (PortAudioCallback)(
|
|
- void *inputBuffer, void *outputBuffer,
|
|
- unsigned long framesPerBuffer,
|
|
- PaTimestamp outTime, void *userData );
|
|
-
|
|
-
|
|
-/*
|
|
- Stream flags
|
|
-
|
|
- These flags may be supplied (ored together) in the streamFlags argument to
|
|
- the Pa_OpenStream() function.
|
|
-
|
|
-*/
|
|
-
|
|
-#define paNoFlag (0)
|
|
-#define paClipOff (1<<0) /* disable default clipping of out of range samples */
|
|
-#define paDitherOff (1<<1) /* disable default dithering */
|
|
-#define paPlatformSpecificFlags (0x00010000)
|
|
-typedef unsigned long PaStreamFlags;
|
|
-
|
|
-/*
|
|
- A single PortAudioStream provides multiple channels of real-time
|
|
- input and output audio streaming to a client application.
|
|
- Pointers to PortAudioStream objects are passed between PortAudio functions.
|
|
-*/
|
|
-
|
|
-typedef void PortAudioStream;
|
|
-#define PaStream PortAudioStream
|
|
-
|
|
-/*
|
|
- Pa_OpenStream() opens a stream for either input, output or both.
|
|
-
|
|
- stream is the address of a PortAudioStream pointer which will receive
|
|
- a pointer to the newly opened stream.
|
|
-
|
|
- inputDevice is the id of the device used for input (see PaDeviceID above.)
|
|
- inputDevice may be paNoDevice to indicate that an input device is not required.
|
|
-
|
|
- numInputChannels is the number of channels of sound to be delivered to the
|
|
- callback. It can range from 1 to the value of maxInputChannels in the
|
|
- PaDeviceInfo record for the device specified by the inputDevice parameter.
|
|
- If inputDevice is paNoDevice numInputChannels is ignored.
|
|
-
|
|
- inputSampleFormat is the sample format of inputBuffer provided to the callback
|
|
- function. inputSampleFormat may be any of the formats described by the
|
|
- PaSampleFormat enumeration (see above). PortAudio guarantees support for
|
|
- the device's native formats (nativeSampleFormats in the device info record)
|
|
- and additionally 16 and 32 bit integer and 32 bit floating point formats.
|
|
- Support for other formats is implementation defined.
|
|
-
|
|
- inputDriverInfo is a pointer to an optional driver specific data structure
|
|
- containing additional information for device setup or stream processing.
|
|
- inputDriverInfo is never required for correct operation. If not used
|
|
- inputDriverInfo should be NULL.
|
|
-
|
|
- outputDevice is the id of the device used for output (see PaDeviceID above.)
|
|
- outputDevice may be paNoDevice to indicate that an output device is not required.
|
|
-
|
|
- numOutputChannels is the number of channels of sound to be supplied by the
|
|
- callback. See the definition of numInputChannels above for more details.
|
|
-
|
|
- outputSampleFormat is the sample format of the outputBuffer filled by the
|
|
- callback function. See the definition of inputSampleFormat above for more
|
|
- details.
|
|
-
|
|
- outputDriverInfo is a pointer to an optional driver specific data structure
|
|
- containing additional information for device setup or stream processing.
|
|
- outputDriverInfo is never required for correct operation. If not used
|
|
- outputDriverInfo should be NULL.
|
|
-
|
|
- sampleRate is the desired sampleRate. For full-duplex streams it is the
|
|
- sample rate for both input and output
|
|
-
|
|
- framesPerBuffer is the length in sample frames of all internal sample buffers
|
|
- used for communication with platform specific audio routines. Wherever
|
|
- possible this corresponds to the framesPerBuffer parameter passed to the
|
|
- callback function.
|
|
-
|
|
- numberOfBuffers is the number of buffers used for multibuffered communication
|
|
- with the platform specific audio routines. If you pass zero, then an optimum
|
|
- value will be chosen for you internally. This parameter is provided only
|
|
- as a guide - and does not imply that an implementation must use multibuffered
|
|
- i/o when reliable double buffering is available (such as SndPlayDoubleBuffer()
|
|
- on the Macintosh.)
|
|
-
|
|
- streamFlags may contain a combination of flags ORed together.
|
|
- These flags modify the behaviour of the streaming process. Some flags may only
|
|
- be relevant to certain buffer formats.
|
|
-
|
|
- callback is a pointer to a client supplied function that is responsible
|
|
- for processing and filling input and output buffers (see above for details.)
|
|
-
|
|
- userData is a client supplied pointer which is passed to the callback
|
|
- function. It could for example, contain a pointer to instance data necessary
|
|
- for processing the audio buffers.
|
|
-
|
|
- return value:
|
|
- Upon success Pa_OpenStream() returns PaNoError and places a pointer to a
|
|
- valid PortAudioStream in the stream argument. The stream is inactive (stopped).
|
|
- If a call to Pa_OpenStream() fails a non-zero error code is returned (see
|
|
- PaError above) and the value of stream is invalid.
|
|
-
|
|
-*/
|
|
-
|
|
-PaError Pa_OpenStream( PortAudioStream** stream,
|
|
- PaDeviceID inputDevice,
|
|
- int numInputChannels,
|
|
- PaSampleFormat inputSampleFormat,
|
|
- void *inputDriverInfo,
|
|
- PaDeviceID outputDevice,
|
|
- int numOutputChannels,
|
|
- PaSampleFormat outputSampleFormat,
|
|
- void *outputDriverInfo,
|
|
- double sampleRate,
|
|
- unsigned long framesPerBuffer,
|
|
- unsigned long numberOfBuffers,
|
|
- PaStreamFlags streamFlags,
|
|
- PortAudioCallback *callback,
|
|
- void *userData );
|
|
-
|
|
-
|
|
-/*
|
|
- Pa_OpenDefaultStream() is a simplified version of Pa_OpenStream() that opens
|
|
- the default input and/or output devices. Most parameters have identical meaning
|
|
- to their Pa_OpenStream() counterparts, with the following exceptions:
|
|
-
|
|
- If either numInputChannels or numOutputChannels is 0 the respective device
|
|
- is not opened. This has the same effect as passing paNoDevice in the device
|
|
- arguments to Pa_OpenStream().
|
|
-
|
|
- sampleFormat applies to both the input and output buffers.
|
|
-
|
|
-*/
|
|
-
|
|
-PaError Pa_OpenDefaultStream( PortAudioStream** stream,
|
|
- int numInputChannels,
|
|
- int numOutputChannels,
|
|
- PaSampleFormat sampleFormat,
|
|
- double sampleRate,
|
|
- unsigned long framesPerBuffer,
|
|
- unsigned long numberOfBuffers,
|
|
- PortAudioCallback *callback,
|
|
- void *userData );
|
|
-
|
|
-/*
|
|
- Pa_CloseStream() closes an audio stream, flushing any pending buffers.
|
|
-
|
|
-*/
|
|
-
|
|
-PaError Pa_CloseStream( PortAudioStream* );
|
|
-
|
|
-/*
|
|
- Pa_StartStream() and Pa_StopStream() begin and terminate audio processing.
|
|
- Pa_StopStream() waits until all pending audio buffers have been played.
|
|
- Pa_AbortStream() stops playing immediately without waiting for pending
|
|
- buffers to complete.
|
|
-
|
|
-*/
|
|
-
|
|
-PaError Pa_StartStream( PortAudioStream *stream );
|
|
-
|
|
-PaError Pa_StopStream( PortAudioStream *stream );
|
|
-
|
|
-PaError Pa_AbortStream( PortAudioStream *stream );
|
|
-
|
|
-/*
|
|
- Pa_StreamActive() returns one (1) when the stream is active (ie playing
|
|
- or recording audio), zero (0) when not playing, or a negative error number
|
|
- if the stream is invalid.
|
|
- The stream is active between calls to Pa_StartStream() and Pa_StopStream(),
|
|
- but may also become inactive if the callback returns a non-zero value.
|
|
- In the latter case, the stream is considered inactive after the last
|
|
- buffer has finished playing.
|
|
-
|
|
-*/
|
|
-
|
|
-PaError Pa_StreamActive( PortAudioStream *stream );
|
|
-
|
|
-/*
|
|
- Pa_StreamTime() returns the current output time in samples for the stream.
|
|
- This time may be used as a time reference (for example synchronizing audio to
|
|
- MIDI).
|
|
-
|
|
-*/
|
|
-
|
|
-PaTimestamp Pa_StreamTime( PortAudioStream *stream );
|
|
-
|
|
-/*
|
|
- Pa_GetCPULoad() returns the CPU Load for the stream.
|
|
- The "CPU Load" is a fraction of total CPU time consumed by the stream's
|
|
- audio processing routines including, but not limited to the client supplied
|
|
- callback.
|
|
- A value of 0.5 would imply that PortAudio and the sound generating
|
|
- callback was consuming roughly 50% of the available CPU time.
|
|
- This function may be called from the callback function or the application.
|
|
-
|
|
-*/
|
|
-
|
|
-double Pa_GetCPULoad( PortAudioStream* stream );
|
|
-
|
|
-/*
|
|
- Pa_GetMinNumBuffers() returns the minimum number of buffers required by
|
|
- the current host based on minimum latency.
|
|
- On the PC, for the DirectSound implementation, latency can be optionally set
|
|
- by user by setting an environment variable.
|
|
- For example, to set latency to 200 msec, put:
|
|
-
|
|
- set PA_MIN_LATENCY_MSEC=200
|
|
-
|
|
- in the AUTOEXEC.BAT file and reboot.
|
|
- If the environment variable is not set, then the latency will be determined
|
|
- based on the OS. Windows NT has higher latency than Win95.
|
|
-
|
|
-*/
|
|
-
|
|
-int Pa_GetMinNumBuffers( int framesPerBuffer, double sampleRate );
|
|
-
|
|
-/*
|
|
- Pa_Sleep() puts the caller to sleep for at least 'msec' milliseconds.
|
|
- You may sleep longer than the requested time so don't rely on this for
|
|
- accurate musical timing.
|
|
-
|
|
- Pa_Sleep() is provided as a convenience for authors of portable code (such as
|
|
- the tests and examples in the PortAudio distribution.)
|
|
-
|
|
-*/
|
|
-
|
|
-void Pa_Sleep( long msec );
|
|
-
|
|
-/*
|
|
- Pa_GetSampleSize() returns the size in bytes of a single sample in the
|
|
- supplied PaSampleFormat, or paSampleFormatNotSupported if the format is
|
|
- no supported.
|
|
-
|
|
-*/
|
|
-
|
|
-PaError Pa_GetSampleSize( PaSampleFormat format );
|
|
-
|
|
-
|
|
-#ifdef __cplusplus
|
|
-}
|
|
-#endif /* __cplusplus */
|
|
-#endif /* PORT_AUDIO_H */
|
|
--- a/src/portaudio19.h
|
|
+++ /dev/null
|
|
@@ -1,1127 +0,0 @@
|
|
-// NOTE: Copy this file to portaudio.h in order to compile with V19 portaudio
|
|
-
|
|
-#ifndef PORTAUDIO_H
|
|
-#define PORTAUDIO_H
|
|
-/*
|
|
- * $Id: portaudio.h 1061 2006-06-19 22:46:41Z lschwardt $
|
|
- * 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.
|
|
- *
|
|
- * 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.
|
|
- */
|
|
-
|
|
-/** @file
|
|
- @brief The PortAudio API.
|
|
-*/
|
|
-
|
|
-
|
|
-#ifdef __cplusplus
|
|
-extern "C"
|
|
-{
|
|
-#endif /* __cplusplus */
|
|
-
|
|
-
|
|
-/** Retrieve the release number of the currently running PortAudio build,
|
|
- eg 1900.
|
|
-*/
|
|
-int Pa_GetVersion( void );
|
|
-
|
|
-
|
|
-/** Retrieve a textual description of the current PortAudio build,
|
|
- eg "PortAudio V19-devel 13 October 2002".
|
|
-*/
|
|
-const char* Pa_GetVersionText( void );
|
|
-
|
|
-
|
|
-/** Error codes returned by PortAudio functions.
|
|
- Note that with the exception of paNoError, all PaErrorCodes are negative.
|
|
-*/
|
|
-
|
|
-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, /**< @todo review error code name */
|
|
- paCanNotWriteToACallbackStream, /**< @todo review error code name */
|
|
- paCanNotReadFromAnOutputOnlyStream, /**< @todo review error code name */
|
|
- paCanNotWriteToAnInputOnlyStream, /**< @todo review error code name */
|
|
- paIncompatibleStreamHostApi,
|
|
- paBadBufferPtr
|
|
-} PaErrorCode;
|
|
-
|
|
-
|
|
-/** Translate the supplied PortAudio error code into a human readable
|
|
- message.
|
|
-*/
|
|
-const char *Pa_GetErrorText( PaError errorCode );
|
|
-
|
|
-
|
|
-/** Library initialization function - call this before using PortAudio.
|
|
- This function initialises internal data structures and prepares underlying
|
|
- host APIs for use. This function MUST be called before using any other
|
|
- PortAudio API functions.
|
|
-
|
|
- If Pa_Initialize() is called multiple times, each successful
|
|
- call must be matched with a corresponding call to Pa_Terminate().
|
|
- Pairs of calls to Pa_Initialize()/Pa_Terminate() may overlap, and are not
|
|
- required to be fully nested.
|
|
-
|
|
- Note that if Pa_Initialize() returns an error code, Pa_Terminate() should
|
|
- NOT be called.
|
|
-
|
|
- @return paNoError if successful, otherwise an error code indicating the cause
|
|
- of failure.
|
|
-
|
|
- @see Pa_Terminate
|
|
-*/
|
|
-PaError Pa_Initialize( void );
|
|
-
|
|
-
|
|
-/** Library termination function - call this when finished using PortAudio.
|
|
- This function deallocates all resources allocated by PortAudio since it was
|
|
- initializied by a call to Pa_Initialize(). In cases where Pa_Initialise() has
|
|
- been called multiple times, each call must be matched with a corresponding call
|
|
- to Pa_Terminate(). The final matching call to Pa_Terminate() will automatically
|
|
- close any PortAudio streams that are still open.
|
|
-
|
|
- Pa_Terminate() MUST be called before exiting a program which uses PortAudio.
|
|
- Failure to do so may result in serious resource leaks, such as audio devices
|
|
- not being available until the next reboot.
|
|
-
|
|
- @return paNoError if successful, otherwise an error code indicating the cause
|
|
- of failure.
|
|
-
|
|
- @see Pa_Initialize
|
|
-*/
|
|
-PaError Pa_Terminate( void );
|
|
-
|
|
-
|
|
-
|
|
-/** The type used to refer to audio devices. Values of this type usually
|
|
- range from 0 to (Pa_DeviceCount-1), and may also take on the PaNoDevice
|
|
- and paUseHostApiSpecificDeviceSpecification values.
|
|
-
|
|
- @see Pa_DeviceCount, paNoDevice, paUseHostApiSpecificDeviceSpecification
|
|
-*/
|
|
-typedef int PaDeviceIndex;
|
|
-
|
|
-
|
|
-/** A special PaDeviceIndex value indicating that no device is available,
|
|
- or should be used.
|
|
-
|
|
- @see PaDeviceIndex
|
|
-*/
|
|
-#define paNoDevice ((PaDeviceIndex)-1)
|
|
-
|
|
-
|
|
-/** A special PaDeviceIndex value indicating that the device(s) to be used
|
|
- are specified in the host api specific stream info structure.
|
|
-
|
|
- @see PaDeviceIndex
|
|
-*/
|
|
-#define paUseHostApiSpecificDeviceSpecification ((PaDeviceIndex)-2)
|
|
-
|
|
-
|
|
-/* Host API enumeration mechanism */
|
|
-
|
|
-/** The type used to enumerate to host APIs at runtime. Values of this type
|
|
- range from 0 to (Pa_GetHostApiCount()-1).
|
|
-
|
|
- @see Pa_GetHostApiCount
|
|
-*/
|
|
-typedef int PaHostApiIndex;
|
|
-
|
|
-
|
|
-/** Retrieve the number of available host APIs. Even if a host API is
|
|
- available it may have no devices available.
|
|
-
|
|
- @return A non-negative value indicating the number of available host APIs
|
|
- or, a PaErrorCode (which are always negative) if PortAudio is not initialized
|
|
- or an error is encountered.
|
|
-
|
|
- @see PaHostApiIndex
|
|
-*/
|
|
-PaHostApiIndex Pa_GetHostApiCount( void );
|
|
-
|
|
-
|
|
-/** Retrieve the index of the default host API. The default host API will be
|
|
- the lowest common denominator host API on the current platform and is
|
|
- unlikely to provide the best performance.
|
|
-
|
|
- @return A non-negative value ranging from 0 to (Pa_GetHostApiCount()-1)
|
|
- indicating the default host API index or, a PaErrorCode (which are always
|
|
- negative) if PortAudio is not initialized or an error is encountered.
|
|
-*/
|
|
-PaHostApiIndex Pa_GetDefaultHostApi( void );
|
|
-
|
|
-
|
|
-/** Unchanging unique identifiers for each supported host API. This type
|
|
- is used in the PaHostApiInfo structure. The values are guaranteed to be
|
|
- unique and to never change, thus allowing code to be written that
|
|
- conditionally uses host API specific extensions.
|
|
-
|
|
- New type ids will be allocated when support for a host API reaches
|
|
- "public alpha" status, prior to that developers should use the
|
|
- paInDevelopment type id.
|
|
-
|
|
- @see PaHostApiInfo
|
|
-*/
|
|
-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
|
|
-} PaHostApiTypeId;
|
|
-
|
|
-
|
|
-/** A structure containing information about a particular host API. */
|
|
-
|
|
-typedef struct PaHostApiInfo
|
|
-{
|
|
- /** this is struct version 1 */
|
|
- int structVersion;
|
|
- /** The well known unique identifier of this host API @see PaHostApiTypeId */
|
|
- PaHostApiTypeId type;
|
|
- /** A textual description of the host API for display on user interfaces. */
|
|
- const char *name;
|
|
-
|
|
- /** The number of devices belonging to this host API. This field may be
|
|
- used in conjunction with Pa_HostApiDeviceIndexToDeviceIndex() to enumerate
|
|
- all devices for this host API.
|
|
- @see Pa_HostApiDeviceIndexToDeviceIndex
|
|
- */
|
|
- int deviceCount;
|
|
-
|
|
- /** The default input device for this host API. The value will be a
|
|
- device index ranging from 0 to (Pa_GetDeviceCount()-1), or paNoDevice
|
|
- if no default input device is available.
|
|
- */
|
|
- PaDeviceIndex defaultInputDevice;
|
|
-
|
|
- /** The default output device for this host API. The value will be a
|
|
- device index ranging from 0 to (Pa_GetDeviceCount()-1), or paNoDevice
|
|
- if no default output device is available.
|
|
- */
|
|
- PaDeviceIndex defaultOutputDevice;
|
|
-
|
|
-} PaHostApiInfo;
|
|
-
|
|
-
|
|
-/** Retrieve a pointer to a structure containing information about a specific
|
|
- host Api.
|
|
-
|
|
- @param hostApi A valid host API index ranging from 0 to (Pa_GetHostApiCount()-1)
|
|
-
|
|
- @return A pointer to an immutable PaHostApiInfo structure describing
|
|
- a specific host API. If the hostApi parameter is out of range or an error
|
|
- is encountered, the function returns NULL.
|
|
-
|
|
- The returned structure is owned by the PortAudio implementation and must not
|
|
- be manipulated or freed. The pointer is only guaranteed to be valid between
|
|
- calls to Pa_Initialize() and Pa_Terminate().
|
|
-*/
|
|
-const PaHostApiInfo * Pa_GetHostApiInfo( PaHostApiIndex hostApi );
|
|
-
|
|
-
|
|
-/** Convert a static host API unique identifier, into a runtime
|
|
- host API index.
|
|
-
|
|
- @param type A unique host API identifier belonging to the PaHostApiTypeId
|
|
- enumeration.
|
|
-
|
|
- @return A valid PaHostApiIndex ranging from 0 to (Pa_GetHostApiCount()-1) or,
|
|
- a PaErrorCode (which are always negative) if PortAudio is not initialized
|
|
- or an error is encountered.
|
|
-
|
|
- The paHostApiNotFound error code indicates that the host API specified by the
|
|
- type parameter is not available.
|
|
-
|
|
- @see PaHostApiTypeId
|
|
-*/
|
|
-PaHostApiIndex Pa_HostApiTypeIdToHostApiIndex( PaHostApiTypeId type );
|
|
-
|
|
-
|
|
-/** Convert a host-API-specific device index to standard PortAudio device index.
|
|
- This function may be used in conjunction with the deviceCount field of
|
|
- PaHostApiInfo to enumerate all devices for the specified host API.
|
|
-
|
|
- @param hostApi A valid host API index ranging from 0 to (Pa_GetHostApiCount()-1)
|
|
-
|
|
- @param hostApiDeviceIndex A valid per-host device index in the range
|
|
- 0 to (Pa_GetHostApiInfo(hostApi)->deviceCount-1)
|
|
-
|
|
- @return A non-negative PaDeviceIndex ranging from 0 to (Pa_GetDeviceCount()-1)
|
|
- or, a PaErrorCode (which are always negative) if PortAudio is not initialized
|
|
- or an error is encountered.
|
|
-
|
|
- A paInvalidHostApi error code indicates that the host API index specified by
|
|
- the hostApi parameter is out of range.
|
|
-
|
|
- A paInvalidDevice error code indicates that the hostApiDeviceIndex parameter
|
|
- is out of range.
|
|
-
|
|
- @see PaHostApiInfo
|
|
-*/
|
|
-PaDeviceIndex Pa_HostApiDeviceIndexToDeviceIndex( PaHostApiIndex hostApi,
|
|
- int hostApiDeviceIndex );
|
|
-
|
|
-
|
|
-
|
|
-/** Structure used to return information about a host error condition.
|
|
-*/
|
|
-typedef struct PaHostErrorInfo{
|
|
- PaHostApiTypeId hostApiType; /**< the host API which returned the error code */
|
|
- long errorCode; /**< the error code returned */
|
|
- const char *errorText; /**< a textual description of the error if available, otherwise a zero-length string */
|
|
-}PaHostErrorInfo;
|
|
-
|
|
-
|
|
-/** Return information about the last host error encountered. The error
|
|
- information returned by Pa_GetLastHostErrorInfo() will never be modified
|
|
- asyncronously by errors occurring in other PortAudio owned threads
|
|
- (such as the thread that manages the stream callback.)
|
|
-
|
|
- This function is provided as a last resort, primarily to enhance debugging
|
|
- by providing clients with access to all available error information.
|
|
-
|
|
- @return A pointer to an immutable structure constaining information about
|
|
- the host error. The values in this structure will only be valid if a
|
|
- PortAudio function has previously returned the paUnanticipatedHostError
|
|
- error code.
|
|
-*/
|
|
-const PaHostErrorInfo* Pa_GetLastHostErrorInfo( void );
|
|
-
|
|
-
|
|
-
|
|
-/* Device enumeration and capabilities */
|
|
-
|
|
-/** Retrieve the number of available devices. The number of available devices
|
|
- may be zero.
|
|
-
|
|
- @return A non-negative value indicating the number of available devices or,
|
|
- a PaErrorCode (which are always negative) if PortAudio is not initialized
|
|
- or an error is encountered.
|
|
-*/
|
|
-PaDeviceIndex Pa_GetDeviceCount( void );
|
|
-
|
|
-
|
|
-/** Retrieve the index of the default input device. The result can be
|
|
- used in the inputDevice parameter to Pa_OpenStream().
|
|
-
|
|
- @return The default input device index for the default host API, or paNoDevice
|
|
- if no default input device is available or an error was encountered.
|
|
-*/
|
|
-PaDeviceIndex Pa_GetDefaultInputDevice( void );
|
|
-
|
|
-
|
|
-/** Retrieve the index of the default output device. The result can be
|
|
- used in the outputDevice parameter to Pa_OpenStream().
|
|
-
|
|
- @return The default output device index for the defualt host API, or paNoDevice
|
|
- if no default output device is available or an error was encountered.
|
|
-
|
|
- @note
|
|
- On the PC, the user can specify a default device by
|
|
- setting an environment variable. For example, to use device #1.
|
|
-<pre>
|
|
- set PA_RECOMMENDED_OUTPUT_DEVICE=1
|
|
-</pre>
|
|
- The user should first determine the available device ids by using
|
|
- the supplied application "pa_devs".
|
|
-*/
|
|
-PaDeviceIndex Pa_GetDefaultOutputDevice( void );
|
|
-
|
|
-
|
|
-/** The type used to represent monotonic time in seconds that can be used
|
|
- for syncronisation. The type is used for the outTime argument to the
|
|
- PaStreamCallback and as the result of Pa_GetStreamTime().
|
|
-
|
|
- @see PaStreamCallback, Pa_GetStreamTime
|
|
-*/
|
|
-typedef double PaTime;
|
|
-
|
|
-
|
|
-/** A type used to specify one or more sample formats. Each value indicates
|
|
- a possible format for sound data passed to and from the stream callback,
|
|
- Pa_ReadStream and Pa_WriteStream.
|
|
-
|
|
- The standard formats paFloat32, paInt16, paInt32, paInt24, paInt8
|
|
- and aUInt8 are usually implemented by all implementations.
|
|
-
|
|
- The floating point representation (paFloat32) uses +1.0 and -1.0 as the
|
|
- maximum and minimum respectively.
|
|
-
|
|
- paUInt8 is an unsigned 8 bit format where 128 is considered "ground"
|
|
-
|
|
- The paNonInterleaved flag indicates that a multichannel buffer is passed
|
|
- as a set of non-interleaved pointers.
|
|
-
|
|
- @see Pa_OpenStream, Pa_OpenDefaultStream, PaDeviceInfo
|
|
- @see paFloat32, paInt16, paInt32, paInt24, paInt8
|
|
- @see paUInt8, paCustomFormat, paNonInterleaved
|
|
-*/
|
|
-typedef unsigned long PaSampleFormat;
|
|
-
|
|
-
|
|
-#define paFloat32 ((PaSampleFormat) 0x00000001) /**< @see PaSampleFormat */
|
|
-#define paInt32 ((PaSampleFormat) 0x00000002) /**< @see PaSampleFormat */
|
|
-#define paInt24 ((PaSampleFormat) 0x00000004) /**< Packed 24 bit format. @see PaSampleFormat */
|
|
-#define paInt16 ((PaSampleFormat) 0x00000008) /**< @see PaSampleFormat */
|
|
-#define paInt8 ((PaSampleFormat) 0x00000010) /**< @see PaSampleFormat */
|
|
-#define paUInt8 ((PaSampleFormat) 0x00000020) /**< @see PaSampleFormat */
|
|
-#define paCustomFormat ((PaSampleFormat) 0x00010000)/**< @see PaSampleFormat */
|
|
-
|
|
-#define paNonInterleaved ((PaSampleFormat) 0x80000000)
|
|
-
|
|
-/** A structure providing information and capabilities of PortAudio devices.
|
|
- Devices may support input, output or both input and output.
|
|
-*/
|
|
-typedef struct PaDeviceInfo
|
|
-{
|
|
- int structVersion; /* this is struct version 2 */
|
|
- const char *name;
|
|
- PaHostApiIndex hostApi; /* note this is a host API index, not a type id*/
|
|
-
|
|
- int maxInputChannels;
|
|
- int maxOutputChannels;
|
|
-
|
|
- /* Default latency values for interactive performance. */
|
|
- PaTime defaultLowInputLatency;
|
|
- PaTime defaultLowOutputLatency;
|
|
- /* Default latency values for robust non-interactive applications (eg. playing sound files). */
|
|
- PaTime defaultHighInputLatency;
|
|
- PaTime defaultHighOutputLatency;
|
|
-
|
|
- double defaultSampleRate;
|
|
-} PaDeviceInfo;
|
|
-
|
|
-
|
|
-/** Retrieve a pointer to a PaDeviceInfo structure containing information
|
|
- about the specified device.
|
|
- @return A pointer to an immutable PaDeviceInfo structure. If the device
|
|
- parameter is out of range the function returns NULL.
|
|
-
|
|
- @param device A valid device index in the range 0 to (Pa_GetDeviceCount()-1)
|
|
-
|
|
- @note PortAudio manages the memory referenced by the returned pointer,
|
|
- the client must not manipulate or free the memory. The pointer is only
|
|
- guaranteed to be valid between calls to Pa_Initialize() and Pa_Terminate().
|
|
-
|
|
- @see PaDeviceInfo, PaDeviceIndex
|
|
-*/
|
|
-const PaDeviceInfo* Pa_GetDeviceInfo( PaDeviceIndex device );
|
|
-
|
|
-
|
|
-/** Parameters for one direction (input or output) of a stream.
|
|
-*/
|
|
-typedef struct PaStreamParameters
|
|
-{
|
|
- /** A valid device index in the range 0 to (Pa_GetDeviceCount()-1)
|
|
- specifying the device to be used or the special constant
|
|
- paUseHostApiSpecificDeviceSpecification which indicates that the actual
|
|
- device(s) to use are specified in hostApiSpecificStreamInfo.
|
|
- This field must not be set to paNoDevice.
|
|
- */
|
|
- PaDeviceIndex device;
|
|
-
|
|
- /** The number of channels of sound to be delivered to the
|
|
- stream callback or accessed by Pa_ReadStream() or Pa_WriteStream().
|
|
- It can range from 1 to the value of maxInputChannels in the
|
|
- PaDeviceInfo record for the device specified by the device parameter.
|
|
- */
|
|
- int channelCount;
|
|
-
|
|
- /** The sample format of the buffer provided to the stream callback,
|
|
- a_ReadStream() or Pa_WriteStream(). It may be any of the formats described
|
|
- by the PaSampleFormat enumeration.
|
|
- */
|
|
- PaSampleFormat sampleFormat;
|
|
-
|
|
- /** The desired latency in seconds. Where practical, implementations should
|
|
- configure their latency based on these parameters, otherwise they may
|
|
- choose the closest viable latency instead. Unless the suggested latency
|
|
- is greater than the absolute upper limit for the device implementations
|
|
- should round the suggestedLatency up to the next practial value - ie to
|
|
- provide an equal or higher latency than suggestedLatency wherever possibe.
|
|
- Actual latency values for an open stream may be retrieved using the
|
|
- inputLatency and outputLatency fields of the PaStreamInfo structure
|
|
- returned by Pa_GetStreamInfo().
|
|
- @see default*Latency in PaDeviceInfo, *Latency in PaStreamInfo
|
|
- */
|
|
- PaTime suggestedLatency;
|
|
-
|
|
- /** An optional pointer to a host api specific data structure
|
|
- containing additional information for device setup and/or stream processing.
|
|
- hostApiSpecificStreamInfo is never required for correct operation,
|
|
- if not used it should be set to NULL.
|
|
- */
|
|
- void *hostApiSpecificStreamInfo;
|
|
-
|
|
-} PaStreamParameters;
|
|
-
|
|
-
|
|
-/** Return code for Pa_IsFormatSupported indicating success. */
|
|
-#define paFormatIsSupported (0)
|
|
-
|
|
-/** Determine whether it would be possible to open a stream with the specified
|
|
- parameters.
|
|
-
|
|
- @param inputParameters A structure that describes the input parameters used to
|
|
- open a stream. The suggestedLatency field is ignored. See PaStreamParameters
|
|
- for a description of these parameters. inputParameters must be NULL for
|
|
- output-only streams.
|
|
-
|
|
- @param outputParameters A structure that describes the output parameters used
|
|
- to open a stream. The suggestedLatency field is ignored. See PaStreamParameters
|
|
- for a description of these parameters. outputParameters must be NULL for
|
|
- input-only streams.
|
|
-
|
|
- @param sampleRate The required sampleRate. For full-duplex streams it is the
|
|
- sample rate for both input and output
|
|
-
|
|
- @return Returns 0 if the format is supported, and an error code indicating why
|
|
- the format is not supported otherwise. The constant paFormatIsSupported is
|
|
- provided to compare with the return value for success.
|
|
-
|
|
- @see paFormatIsSupported, PaStreamParameters
|
|
-*/
|
|
-PaError Pa_IsFormatSupported( const PaStreamParameters *inputParameters,
|
|
- const PaStreamParameters *outputParameters,
|
|
- double sampleRate );
|
|
-
|
|
-
|
|
-
|
|
-/* Streaming types and functions */
|
|
-
|
|
-
|
|
-/**
|
|
- A single PaStream can provide multiple channels of real-time
|
|
- streaming audio input and output to a client application. A stream
|
|
- provides access to audio hardware represented by one or more
|
|
- PaDevices. Depending on the underlying Host API, it may be possible
|
|
- to open multiple streams using the same device, however this behavior
|
|
- is implementation defined. Portable applications should assume that
|
|
- a PaDevice may be simultaneously used by at most one PaStream.
|
|
-
|
|
- Pointers to PaStream objects are passed between PortAudio functions that
|
|
- operate on streams.
|
|
-
|
|
- @see Pa_OpenStream, Pa_OpenDefaultStream, Pa_OpenDefaultStream, Pa_CloseStream,
|
|
- Pa_StartStream, Pa_StopStream, Pa_AbortStream, Pa_IsStreamActive,
|
|
- Pa_GetStreamTime, Pa_GetStreamCpuLoad
|
|
-
|
|
-*/
|
|
-typedef void PaStream;
|
|
-
|
|
-
|
|
-/** Can be passed as the framesPerBuffer parameter to Pa_OpenStream()
|
|
- or Pa_OpenDefaultStream() to indicate that the stream callback will
|
|
- accept buffers of any size.
|
|
-*/
|
|
-#define paFramesPerBufferUnspecified (0)
|
|
-
|
|
-
|
|
-/** Flags used to control the behavior of a stream. They are passed as
|
|
- parameters to Pa_OpenStream or Pa_OpenDefaultStream. Multiple flags may be
|
|
- ORed together.
|
|
-
|
|
- @see Pa_OpenStream, Pa_OpenDefaultStream
|
|
- @see paNoFlag, paClipOff, paDitherOff, paNeverDropInput,
|
|
- paPrimeOutputBuffersUsingStreamCallback, paPlatformSpecificFlags
|
|
-*/
|
|
-typedef unsigned long PaStreamFlags;
|
|
-
|
|
-/** @see PaStreamFlags */
|
|
-#define paNoFlag ((PaStreamFlags) 0)
|
|
-
|
|
-/** Disable default clipping of out of range samples.
|
|
- @see PaStreamFlags
|
|
-*/
|
|
-#define paClipOff ((PaStreamFlags) 0x00000001)
|
|
-
|
|
-/** Disable default dithering.
|
|
- @see PaStreamFlags
|
|
-*/
|
|
-#define paDitherOff ((PaStreamFlags) 0x00000002)
|
|
-
|
|
-/** Flag requests that where possible a full duplex stream will not discard
|
|
- overflowed input samples without calling the stream callback. This flag is
|
|
- only valid for full duplex callback streams and only when used in combination
|
|
- with the paFramesPerBufferUnspecified (0) framesPerBuffer parameter. Using
|
|
- this flag incorrectly results in a paInvalidFlag error being returned from
|
|
- Pa_OpenStream and Pa_OpenDefaultStream.
|
|
-
|
|
- @see PaStreamFlags, paFramesPerBufferUnspecified
|
|
-*/
|
|
-#define paNeverDropInput ((PaStreamFlags) 0x00000004)
|
|
-
|
|
-/** Call the stream callback to fill initial output buffers, rather than the
|
|
- default behavior of priming the buffers with zeros (silence). This flag has
|
|
- no effect for input-only and blocking read/write streams.
|
|
-
|
|
- @see PaStreamFlags
|
|
-*/
|
|
-#define paPrimeOutputBuffersUsingStreamCallback ((PaStreamFlags) 0x00000008)
|
|
-
|
|
-/** A mask specifying the platform specific bits.
|
|
- @see PaStreamFlags
|
|
-*/
|
|
-#define paPlatformSpecificFlags ((PaStreamFlags)0xFFFF0000)
|
|
-
|
|
-/**
|
|
- Timing information for the buffers passed to the stream callback.
|
|
-*/
|
|
-typedef struct PaStreamCallbackTimeInfo{
|
|
- PaTime inputBufferAdcTime;
|
|
- PaTime currentTime;
|
|
- PaTime outputBufferDacTime;
|
|
-} PaStreamCallbackTimeInfo;
|
|
-
|
|
-
|
|
-/**
|
|
- Flag bit constants for the statusFlags to PaStreamCallback.
|
|
-
|
|
- @see paInputUnderflow, paInputOverflow, paOutputUnderflow, paOutputOverflow,
|
|
- paPrimingOutput
|
|
-*/
|
|
-typedef unsigned long PaStreamCallbackFlags;
|
|
-
|
|
-/** In a stream opened with paFramesPerBufferUnspecified, indicates that
|
|
- input data is all silence (zeros) because no real data is available. In a
|
|
- stream opened without paFramesPerBufferUnspecified, it indicates that one or
|
|
- more zero samples have been inserted into the input buffer to compensate
|
|
- for an input underflow.
|
|
- @see PaStreamCallbackFlags
|
|
-*/
|
|
-#define paInputUnderflow ((PaStreamCallbackFlags) 0x00000001)
|
|
-
|
|
-/** In a stream opened with paFramesPerBufferUnspecified, indicates that data
|
|
- prior to the first sample of the input buffer was discarded due to an
|
|
- overflow, possibly because the stream callback is using too much CPU time.
|
|
- Otherwise indicates that data prior to one or more samples in the
|
|
- input buffer was discarded.
|
|
- @see PaStreamCallbackFlags
|
|
-*/
|
|
-#define paInputOverflow ((PaStreamCallbackFlags) 0x00000002)
|
|
-
|
|
-/** Indicates that output data (or a gap) was inserted, possibly because the
|
|
- stream callback is using too much CPU time.
|
|
- @see PaStreamCallbackFlags
|
|
-*/
|
|
-#define paOutputUnderflow ((PaStreamCallbackFlags) 0x00000004)
|
|
-
|
|
-/** Indicates that output data will be discarded because no room is available.
|
|
- @see PaStreamCallbackFlags
|
|
-*/
|
|
-#define paOutputOverflow ((PaStreamCallbackFlags) 0x00000008)
|
|
-
|
|
-/** Some of all of the output data will be used to prime the stream, input
|
|
- data may be zero.
|
|
- @see PaStreamCallbackFlags
|
|
-*/
|
|
-#define paPrimingOutput ((PaStreamCallbackFlags) 0x00000010)
|
|
-
|
|
-/**
|
|
- Allowable return values for the PaStreamCallback.
|
|
- @see PaStreamCallback
|
|
-*/
|
|
-typedef enum PaStreamCallbackResult
|
|
-{
|
|
- paContinue=0,
|
|
- paComplete=1,
|
|
- paAbort=2
|
|
-} PaStreamCallbackResult;
|
|
-
|
|
-
|
|
-/**
|
|
- Functions of type PaStreamCallback are implemented by PortAudio clients.
|
|
- They consume, process or generate audio in response to requests from an
|
|
- active PortAudio stream.
|
|
-
|
|
- @param input and @param output are arrays of interleaved samples,
|
|
- the format, packing and number of channels used by the buffers are
|
|
- determined by parameters to Pa_OpenStream().
|
|
-
|
|
- @param frameCount The number of sample frames to be processed by
|
|
- the stream callback.
|
|
-
|
|
- @param timeInfo The time in seconds when the first sample of the input
|
|
- buffer was received at the audio input, the time in seconds when the first
|
|
- sample of the output buffer will begin being played at the audio output, and
|
|
- the time in seconds when the stream callback was called.
|
|
- See also Pa_GetStreamTime()
|
|
-
|
|
- @param statusFlags Flags indicating whether input and/or output buffers
|
|
- have been inserted or will be dropped to overcome underflow or overflow
|
|
- conditions.
|
|
-
|
|
- @param userData The value of a user supplied pointer passed to
|
|
- Pa_OpenStream() intended for storing synthesis data etc.
|
|
-
|
|
- @return
|
|
- The stream callback should return one of the values in the
|
|
- PaStreamCallbackResult enumeration. To ensure that the callback continues
|
|
- to be called, it should return paContinue (0). Either paComplete or paAbort
|
|
- can be returned to finish stream processing, after either of these values is
|
|
- returned the callback will not be called again. If paAbort is returned the
|
|
- stream will finish as soon as possible. If paComplete is returned, the stream
|
|
- will continue until all buffers generated by the callback have been played.
|
|
- This may be useful in applications such as soundfile players where a specific
|
|
- duration of output is required. However, it is not necessary to utilise this
|
|
- mechanism as Pa_StopStream(), Pa_AbortStream() or Pa_CloseStream() can also
|
|
- be used to stop the stream. The callback must always fill the entire output
|
|
- buffer irrespective of its return value.
|
|
-
|
|
- @see Pa_OpenStream, Pa_OpenDefaultStream
|
|
-
|
|
- @note With the exception of Pa_GetStreamCpuLoad() it is not permissable to call
|
|
- PortAudio API functions from within the stream callback.
|
|
-*/
|
|
-typedef int PaStreamCallback(
|
|
- const void *input, void *output,
|
|
- unsigned long frameCount,
|
|
- const PaStreamCallbackTimeInfo* timeInfo,
|
|
- PaStreamCallbackFlags statusFlags,
|
|
- void *userData );
|
|
-
|
|
-
|
|
-/** Opens a stream for either input, output or both.
|
|
-
|
|
- @param stream The address of a PaStream pointer which will receive
|
|
- a pointer to the newly opened stream.
|
|
-
|
|
- @param inputParameters A structure that describes the input parameters used by
|
|
- the opened stream. See PaStreamParameters for a description of these parameters.
|
|
- inputParameters must be NULL for output-only streams.
|
|
-
|
|
- @param outputParameters A structure that describes the output parameters used by
|
|
- the opened stream. See PaStreamParameters for a description of these parameters.
|
|
- outputParameters must be NULL for input-only streams.
|
|
-
|
|
- @param sampleRate The desired sampleRate. For full-duplex streams it is the
|
|
- sample rate for both input and output
|
|
-
|
|
- @param framesPerBuffer The number of frames passed to the stream callback
|
|
- function, or the preferred block granularity for a blocking read/write stream.
|
|
- The special value paFramesPerBufferUnspecified (0) may be used to request that
|
|
- the stream callback will recieve an optimal (and possibly varying) number of
|
|
- frames based on host requirements and the requested latency settings.
|
|
- Note: With some host APIs, the use of non-zero framesPerBuffer for a callback
|
|
- stream may introduce an additional layer of buffering which could introduce
|
|
- additional latency. PortAudio guarantees that the additional latency
|
|
- will be kept to the theoretical minimum however, it is strongly recommended
|
|
- that a non-zero framesPerBuffer value only be used when your algorithm
|
|
- requires a fixed number of frames per stream callback.
|
|
-
|
|
- @param streamFlags Flags which modify the behaviour of the streaming process.
|
|
- This parameter may contain a combination of flags ORed together. Some flags may
|
|
- only be relevant to certain buffer formats.
|
|
-
|
|
- @param streamCallback A pointer to a client supplied function that is responsible
|
|
- for processing and filling input and output buffers. If this parameter is NULL
|
|
- the stream will be opened in 'blocking read/write' mode. In blocking mode,
|
|
- the client can receive sample data using Pa_ReadStream and write sample data
|
|
- using Pa_WriteStream, the number of samples that may be read or written
|
|
- without blocking is returned by Pa_GetStreamReadAvailable and
|
|
- Pa_GetStreamWriteAvailable respectively.
|
|
-
|
|
- @param userData A client supplied pointer which is passed to the stream callback
|
|
- function. It could for example, contain a pointer to instance data necessary
|
|
- for processing the audio buffers. This parameter is ignored if streamCallback
|
|
- is NULL.
|
|
-
|
|
- @return
|
|
- Upon success Pa_OpenStream() returns paNoError and places a pointer to a
|
|
- valid PaStream in the stream argument. The stream is inactive (stopped).
|
|
- If a call to Pa_OpenStream() fails, a non-zero error code is returned (see
|
|
- PaError for possible error codes) and the value of stream is invalid.
|
|
-
|
|
- @see PaStreamParameters, PaStreamCallback, Pa_ReadStream, Pa_WriteStream,
|
|
- Pa_GetStreamReadAvailable, Pa_GetStreamWriteAvailable
|
|
-*/
|
|
-PaError Pa_OpenStream( PaStream** stream,
|
|
- const PaStreamParameters *inputParameters,
|
|
- const PaStreamParameters *outputParameters,
|
|
- double sampleRate,
|
|
- unsigned long framesPerBuffer,
|
|
- PaStreamFlags streamFlags,
|
|
- PaStreamCallback *streamCallback,
|
|
- void *userData );
|
|
-
|
|
-
|
|
-/** A simplified version of Pa_OpenStream() that opens the default input
|
|
- and/or output devices.
|
|
-
|
|
- @param stream The address of a PaStream pointer which will receive
|
|
- a pointer to the newly opened stream.
|
|
-
|
|
- @param numInputChannels The number of channels of sound that will be supplied
|
|
- to the stream callback or returned by Pa_ReadStream. It can range from 1 to
|
|
- the value of maxInputChannels in the PaDeviceInfo record for the default input
|
|
- device. If 0 the stream is opened as an output-only stream.
|
|
-
|
|
- @param numOutputChannels The number of channels of sound to be delivered to the
|
|
- stream callback or passed to Pa_WriteStream. It can range from 1 to the value
|
|
- of maxOutputChannels in the PaDeviceInfo record for the default output dvice.
|
|
- If 0 the stream is opened as an output-only stream.
|
|
-
|
|
- @param sampleFormat The sample format of both the input and output buffers
|
|
- provided to the callback or passed to and from Pa_ReadStream and Pa_WriteStream.
|
|
- sampleFormat may be any of the formats described by the PaSampleFormat
|
|
- enumeration.
|
|
-
|
|
- @param sampleRate Same as Pa_OpenStream parameter of the same name.
|
|
- @param framesPerBuffer Same as Pa_OpenStream parameter of the same name.
|
|
- @param streamCallback Same as Pa_OpenStream parameter of the same name.
|
|
- @param userData Same as Pa_OpenStream parameter of the same name.
|
|
-
|
|
- @return As for Pa_OpenStream
|
|
-
|
|
- @see Pa_OpenStream, PaStreamCallback
|
|
-*/
|
|
-PaError Pa_OpenDefaultStream( PaStream** stream,
|
|
- int numInputChannels,
|
|
- int numOutputChannels,
|
|
- PaSampleFormat sampleFormat,
|
|
- double sampleRate,
|
|
- unsigned long framesPerBuffer,
|
|
- PaStreamCallback *streamCallback,
|
|
- void *userData );
|
|
-
|
|
-
|
|
-/** Closes an audio stream. If the audio stream is active it
|
|
- discards any pending buffers as if Pa_AbortStream() had been called.
|
|
-*/
|
|
-PaError Pa_CloseStream( PaStream *stream );
|
|
-
|
|
-
|
|
-/** Functions of type PaStreamFinishedCallback are implemented by PortAudio
|
|
- clients. They can be registered with a stream using the Pa_SetStreamFinishedCallback
|
|
- function. Once registered they are called when the stream becomes inactive
|
|
- (ie once a call to Pa_StopStream() will not block).
|
|
- A stream will become inactive after the stream callback returns non-zero,
|
|
- or when Pa_StopStream or Pa_AbortStream is called. For a stream providing audio
|
|
- output, if the stream callback returns paComplete, or Pa_StopStream is called,
|
|
- the stream finished callback will not be called until all generated sample data
|
|
- has been played.
|
|
-
|
|
- @param userData The userData parameter supplied to Pa_OpenStream()
|
|
-
|
|
- @see Pa_SetStreamFinishedCallback
|
|
-*/
|
|
-typedef void PaStreamFinishedCallback( void *userData );
|
|
-
|
|
-
|
|
-/** Register a stream finished callback function which will be called when the
|
|
- stream becomes inactive. See the description of PaStreamFinishedCallback for
|
|
- further details about when the callback will be called.
|
|
-
|
|
- @param stream a pointer to a PaStream that is in the stopped state - if the
|
|
- stream is not stopped, the stream's finished callback will remain unchanged
|
|
- and an error code will be returned.
|
|
-
|
|
- @param streamFinishedCallback a pointer to a function with the same signature
|
|
- as PaStreamFinishedCallback, that will be called when the stream becomes
|
|
- inactive. Passing NULL for this parameter will un-register a previously
|
|
- registered stream finished callback function.
|
|
-
|
|
- @return on success returns paNoError, otherwise an error code indicating the cause
|
|
- of the error.
|
|
-
|
|
- @see PaStreamFinishedCallback
|
|
-*/
|
|
-PaError Pa_SetStreamFinishedCallback( PaStream *stream, PaStreamFinishedCallback* streamFinishedCallback );
|
|
-
|
|
-
|
|
-/** Commences audio processing.
|
|
-*/
|
|
-PaError Pa_StartStream( PaStream *stream );
|
|
-
|
|
-
|
|
-/** Terminates audio processing. It waits until all pending
|
|
- audio buffers have been played before it returns.
|
|
-*/
|
|
-PaError Pa_StopStream( PaStream *stream );
|
|
-
|
|
-
|
|
-/** Terminates audio processing immediately without waiting for pending
|
|
- buffers to complete.
|
|
-*/
|
|
-PaError Pa_AbortStream( PaStream *stream );
|
|
-
|
|
-
|
|
-/** Determine whether the stream is stopped.
|
|
- A stream is considered to be stopped prior to a successful call to
|
|
- Pa_StartStream and after a successful call to Pa_StopStream or Pa_AbortStream.
|
|
- If a stream callback returns a value other than paContinue the stream is NOT
|
|
- considered to be stopped.
|
|
-
|
|
- @return Returns one (1) when the stream is stopped, zero (0) when
|
|
- the stream is running or, a PaErrorCode (which are always negative) if
|
|
- PortAudio is not initialized or an error is encountered.
|
|
-
|
|
- @see Pa_StopStream, Pa_AbortStream, Pa_IsStreamActive
|
|
-*/
|
|
-PaError Pa_IsStreamStopped( PaStream *stream );
|
|
-
|
|
-
|
|
-/** Determine whether the stream is active.
|
|
- A stream is active after a successful call to Pa_StartStream(), until it
|
|
- becomes inactive either as a result of a call to Pa_StopStream() or
|
|
- Pa_AbortStream(), or as a result of a return value other than paContinue from
|
|
- the stream callback. In the latter case, the stream is considered inactive
|
|
- after the last buffer has finished playing.
|
|
-
|
|
- @return Returns one (1) when the stream is active (ie playing or recording
|
|
- audio), zero (0) when not playing or, a PaErrorCode (which are always negative)
|
|
- if PortAudio is not initialized or an error is encountered.
|
|
-
|
|
- @see Pa_StopStream, Pa_AbortStream, Pa_IsStreamStopped
|
|
-*/
|
|
-PaError Pa_IsStreamActive( PaStream *stream );
|
|
-
|
|
-
|
|
-
|
|
-/** A structure containing unchanging information about an open stream.
|
|
- @see Pa_GetStreamInfo
|
|
-*/
|
|
-
|
|
-typedef struct PaStreamInfo
|
|
-{
|
|
- /** this is struct version 1 */
|
|
- int structVersion;
|
|
-
|
|
- /** The input latency of the stream in seconds. This value provides the most
|
|
- accurate estimate of input latency available to the implementation. It may
|
|
- differ significantly from the suggestedLatency value passed to Pa_OpenStream().
|
|
- The value of this field will be zero (0.) for output-only streams.
|
|
- @see PaTime
|
|
- */
|
|
- PaTime inputLatency;
|
|
-
|
|
- /** The output latency of the stream in seconds. This value provides the most
|
|
- accurate estimate of output latency available to the implementation. It may
|
|
- differ significantly from the suggestedLatency value passed to Pa_OpenStream().
|
|
- The value of this field will be zero (0.) for input-only streams.
|
|
- @see PaTime
|
|
- */
|
|
- PaTime outputLatency;
|
|
-
|
|
- /** The sample rate of the stream in Hertz (samples per second). In cases
|
|
- where the hardware sample rate is inaccurate and PortAudio is aware of it,
|
|
- the value of this field may be different from the sampleRate parameter
|
|
- passed to Pa_OpenStream(). If information about the actual hardware sample
|
|
- rate is not available, this field will have the same value as the sampleRate
|
|
- parameter passed to Pa_OpenStream().
|
|
- */
|
|
- double sampleRate;
|
|
-
|
|
-} PaStreamInfo;
|
|
-
|
|
-
|
|
-/** Retrieve a pointer to a PaStreamInfo structure containing information
|
|
- about the specified stream.
|
|
- @return A pointer to an immutable PaStreamInfo structure. If the stream
|
|
- parameter invalid, or an error is encountered, the function returns NULL.
|
|
-
|
|
- @param stream A pointer to an open stream previously created with Pa_OpenStream.
|
|
-
|
|
- @note PortAudio manages the memory referenced by the returned pointer,
|
|
- the client must not manipulate or free the memory. The pointer is only
|
|
- guaranteed to be valid until the specified stream is closed.
|
|
-
|
|
- @see PaStreamInfo
|
|
-*/
|
|
-const PaStreamInfo* Pa_GetStreamInfo( PaStream *stream );
|
|
-
|
|
-
|
|
-/** Determine the current time for the stream according to the same clock used
|
|
- to generate buffer timestamps. This time may be used for syncronising other
|
|
- events to the audio stream, for example synchronizing audio to MIDI.
|
|
-
|
|
- @return The stream's current time in seconds, or 0 if an error occurred.
|
|
-
|
|
- @see PaTime, PaStreamCallback
|
|
-*/
|
|
-PaTime Pa_GetStreamTime( PaStream *stream );
|
|
-
|
|
-
|
|
-/** Retrieve CPU usage information for the specified stream.
|
|
- The "CPU Load" is a fraction of total CPU time consumed by a callback stream's
|
|
- audio processing routines including, but not limited to the client supplied
|
|
- stream callback. This function does not work with blocking read/write streams.
|
|
-
|
|
- This function may be called from the stream callback function or the
|
|
- application.
|
|
-
|
|
- @return
|
|
- A floating point value, typically between 0.0 and 1.0, where 1.0 indicates
|
|
- that the stream callback is consuming the maximum number of CPU cycles possible
|
|
- to maintain real-time operation. A value of 0.5 would imply that PortAudio and
|
|
- the stream callback was consuming roughly 50% of the available CPU time. The
|
|
- return value may exceed 1.0. A value of 0.0 will always be returned for a
|
|
- blocking read/write stream, or if an error occurrs.
|
|
-*/
|
|
-double Pa_GetStreamCpuLoad( PaStream* stream );
|
|
-
|
|
-
|
|
-/** Read samples from an input stream. The function doesn't return until
|
|
- the entire buffer has been filled - this may involve waiting for the operating
|
|
- system to supply the data.
|
|
-
|
|
- @param stream A pointer to an open stream previously created with Pa_OpenStream.
|
|
-
|
|
- @param buffer A pointer to a buffer of sample frames. The buffer contains
|
|
- samples in the format specified by the inputParameters->sampleFormat field
|
|
- used to open the stream, and the number of channels specified by
|
|
- inputParameters->numChannels. If non-interleaved samples were requested,
|
|
- buffer is a pointer to the first element of an array of non-interleaved
|
|
- buffer pointers, one for each channel.
|
|
-
|
|
- @param frames The number of frames to be read into buffer. This parameter
|
|
- is not constrained to a specific range, however high performance applications
|
|
- will want to match this parameter to the framesPerBuffer parameter used
|
|
- when opening the stream.
|
|
-
|
|
- @return On success PaNoError will be returned, or PaInputOverflowed if input
|
|
- data was discarded by PortAudio after the previous call and before this call.
|
|
-*/
|
|
-PaError Pa_ReadStream( PaStream* stream,
|
|
- void *buffer,
|
|
- unsigned long frames );
|
|
-
|
|
-
|
|
-/** Write samples to an output stream. This function doesn't return until the
|
|
- entire buffer has been consumed - this may involve waiting for the operating
|
|
- system to consume the data.
|
|
-
|
|
- @param stream A pointer to an open stream previously created with Pa_OpenStream.
|
|
-
|
|
- @param buffer A pointer to a buffer of sample frames. The buffer contains
|
|
- samples in the format specified by the outputParameters->sampleFormat field
|
|
- used to open the stream, and the number of channels specified by
|
|
- outputParameters->numChannels. If non-interleaved samples were requested,
|
|
- buffer is a pointer to the first element of an array of non-interleaved
|
|
- buffer pointers, one for each channel.
|
|
-
|
|
- @param frames The number of frames to be written from buffer. This parameter
|
|
- is not constrained to a specific range, however high performance applications
|
|
- will want to match this parameter to the framesPerBuffer parameter used
|
|
- when opening the stream.
|
|
-
|
|
- @return On success PaNoError will be returned, or paOutputUnderflowed if
|
|
- additional output data was inserted after the previous call and before this
|
|
- call.
|
|
-*/
|
|
-PaError Pa_WriteStream( PaStream* stream,
|
|
- const void *buffer,
|
|
- unsigned long frames );
|
|
-
|
|
-
|
|
-/** Retrieve the number of frames that can be read from the stream without
|
|
- waiting.
|
|
-
|
|
- @return Returns a non-negative value representing the maximum number of frames
|
|
- that can be read from the stream without blocking or busy waiting or, a
|
|
- PaErrorCode (which are always negative) if PortAudio is not initialized or an
|
|
- error is encountered.
|
|
-*/
|
|
-signed long Pa_GetStreamReadAvailable( PaStream* stream );
|
|
-
|
|
-
|
|
-/** Retrieve the number of frames that can be written to the stream without
|
|
- waiting.
|
|
-
|
|
- @return Returns a non-negative value representing the maximum number of frames
|
|
- that can be written to the stream without blocking or busy waiting or, a
|
|
- PaErrorCode (which are always negative) if PortAudio is not initialized or an
|
|
- error is encountered.
|
|
-*/
|
|
-signed long Pa_GetStreamWriteAvailable( PaStream* stream );
|
|
-
|
|
-
|
|
-/* Miscellaneous utilities */
|
|
-
|
|
-
|
|
-/** Retrieve the size of a given sample format in bytes.
|
|
-
|
|
- @return The size in bytes of a single sample in the specified format,
|
|
- or paSampleFormatNotSupported if the format is not supported.
|
|
-*/
|
|
-PaError Pa_GetSampleSize( PaSampleFormat format );
|
|
-
|
|
-
|
|
-/** Put the caller to sleep for at least 'msec' milliseconds. This function is
|
|
- provided only as a convenience for authors of portable code (such as the tests
|
|
- and examples in the PortAudio distribution.)
|
|
-
|
|
- The function may sleep longer than requested so don't rely on this for accurate
|
|
- musical timing.
|
|
-*/
|
|
-void Pa_Sleep( long msec );
|
|
-
|
|
-
|
|
-
|
|
-#ifdef __cplusplus
|
|
-}
|
|
-#endif /* __cplusplus */
|
|
-#endif /* PORTAUDIO_H */
|
|
--- a/src/wave.cpp
|
|
+++ b/src/wave.cpp
|
|
@@ -31,7 +31,10 @@
|
|
#include <sys/time.h>
|
|
#include <time.h>
|
|
|
|
-#include "portaudio.h"
|
|
+#ifdef USE_PORTAUDIO
|
|
+#include <portaudio.h>
|
|
+#endif
|
|
+
|
|
#ifdef PLATFORM_WINDOWS
|
|
#include <windows.h>
|
|
#else
|
|
--- a/src/wavegen.cpp
|
|
+++ b/src/wavegen.cpp
|
|
@@ -40,7 +40,7 @@
|
|
#endif
|
|
|
|
#ifdef USE_PORTAUDIO
|
|
-#include "portaudio.h"
|
|
+#include <portaudio.h>
|
|
#undef USE_PORTAUDIO
|
|
// determine portaudio version by looking for a #define which is not in V18
|
|
#ifdef paNeverDropInput
|