windows/portaudio/pa_asio.h

   1 #ifndef PA_ASIO_H
   2 #define PA_ASIO_H
   3 /*
   4  * $Id$
   5  * PortAudio Portable Real-Time Audio Library
   6  * ASIO specific extensions
   7  *
   8  * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining
  11  * a copy of this software and associated documentation files
  12  * (the "Software"), to deal in the Software without restriction,
  13  * including without limitation the rights to use, copy, modify, merge,
  14  * publish, distribute, sublicense, and/or sell copies of the Software,
  15  * and to permit persons to whom the Software is furnished to do so,
  16  * subject to the following conditions:
  17  *
  18  * The above copyright notice and this permission notice shall be
  19  * included in all copies or substantial portions of the Software.
  20  *
  21  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  24  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
  25  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
  26  * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28  */
  29
  30 /*
  31  * The text above constitutes the entire PortAudio license; however,
  32  * the PortAudio community also makes the following non-binding requests:
  33  *
  34  * Any person wishing to distribute modifications to the Software is
  35  * requested to send the modifications to the original developer so that
  36  * they can be incorporated into the canonical version. It is also
  37  * requested that these non-binding requests be included along with the
  38  * license above.
  39  */
  40
  41
  42 /** @file
  43  @ingroup public_header
  44  @brief ASIO-specific PortAudio API extension header file.
  45 */
  46
  47 #include "portaudio.h"
  48
  49 #ifdef __cplusplus
  50 extern "C"
  51 {
  52 #endif /* __cplusplus */
  53
  54
  55 /** Retrieve legal native buffer sizes for the specificed device, in sample frames.
  56
  57  @param device The global index of the device about which the query is being made.
  58  @param minBufferSizeFrames A pointer to the location which will receive the minimum buffer size value.
  59  @param maxBufferSizeFrames A pointer to the location which will receive the maximum buffer size value.
  60  @param preferredBufferSizeFrames A pointer to the location which will receive the preferred buffer size value.
  61  @param granularity A pointer to the location which will receive the "granularity". This value determines
  62  the step size used to compute the legal values between minBufferSizeFrames and maxBufferSizeFrames.
  63  If granularity is -1 then available buffer size values are powers of two.
  64
  65  @see ASIOGetBufferSize in the ASIO SDK.
  66
  67  @note: this function used to be called PaAsio_GetAvailableLatencyValues. There is a
  68  #define that maps PaAsio_GetAvailableLatencyValues to this function for backwards compatibility.
  69 */
  70 PaError PaAsio_GetAvailableBufferSizes( PaDeviceIndex device,
  71                 long *minBufferSizeFrames, long *maxBufferSizeFrames, long *preferredBufferSizeFrames, long *granularity );
  72
  73
  74 /** Backwards compatibility alias for PaAsio_GetAvailableBufferSizes
  75
  76  @see PaAsio_GetAvailableBufferSizes
  77 */
  78 #define PaAsio_GetAvailableLatencyValues PaAsio_GetAvailableBufferSizes
  79
  80
  81 /** Display the ASIO control panel for the specified device.
  82
  83   @param device The global index of the device whose control panel is to be displayed.
  84   @param systemSpecific On Windows, the calling application's main window handle,
  85   on Macintosh this value should be zero.
  86 */
  87 PaError PaAsio_ShowControlPanel( PaDeviceIndex device, void* systemSpecific );
  88
  89
  90
  91
  92 /** Retrieve a pointer to a string containing the name of the specified
  93  input channel. The string is valid until Pa_Terminate is called.
  94
  95  The string will be no longer than 32 characters including the null terminator.
  96 */
  97 PaError PaAsio_GetInputChannelName( PaDeviceIndex device, int channelIndex,
  98         const char** channelName );
  99
 100
 101 /** Retrieve a pointer to a string containing the name of the specified
 102  input channel. The string is valid until Pa_Terminate is called.
 103
 104  The string will be no longer than 32 characters including the null terminator.
 105 */
 106 PaError PaAsio_GetOutputChannelName( PaDeviceIndex device, int channelIndex,
 107         const char** channelName );
 108
 109
 110 /** Set the sample rate of an open paASIO stream.
 111
 112  @param stream The stream to operate on.
 113  @param sampleRate The new sample rate.
 114
 115  Note that this function may fail if the stream is alredy running and the
 116  ASIO driver does not support switching the sample rate of a running stream.
 117
 118  Returns paIncompatibleStreamHostApi if stream is not a paASIO stream.
 119 */
 120 PaError PaAsio_SetStreamSampleRate( PaStream* stream, double sampleRate );
 121
 122
 123 #define paAsioUseChannelSelectors      (0x01)
 124
 125 typedef struct PaAsioStreamInfo{
 126     unsigned long size;             /**< sizeof(PaAsioStreamInfo) */
 127     PaHostApiTypeId hostApiType;    /**< paASIO */
 128     unsigned long version;          /**< 1 */
 129
 130     unsigned long flags;
 131
 132     /* Support for opening only specific channels of an ASIO device.
 133         If the paAsioUseChannelSelectors flag is set, channelSelectors is a
 134         pointer to an array of integers specifying the device channels to use.
 135         When used, the length of the channelSelectors array must match the
 136         corresponding channelCount parameter to Pa_OpenStream() otherwise a
 137         crash may result.
 138         The values in the selectors array must specify channels within the
 139         range of supported channels for the device or paInvalidChannelCount will
 140         result.
 141     */
 142     int *channelSelectors;
 143 }PaAsioStreamInfo;
 144
 145
 146 #ifdef __cplusplus
 147 }
 148 #endif /* __cplusplus */
 149
 150 #endif /* PA_ASIO_H */