[6d9958]: portaudio / src / common / pa_stream.c  Maximize  Restore  History

Download this file

151 lines (122 with data), 5.4 kB

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
/*
* $Id: pa_stream.c 1339 2008-02-15 07:50:33Z rossb $
* Portable Audio I/O Library
* stream interface
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 2008 Ross Bencina
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* The text above constitutes the entire PortAudio license; however,
* the PortAudio community also makes the following non-binding requests:
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version. It is also
* requested that these non-binding requests be included along with the
* license above.
*/
/** @file
@ingroup common_src
@brief Stream interfaces, representation structures and helper functions
used to interface between pa_front.c host API implementations.
*/
#include "pa_stream.h"
void PaUtil_InitializeStreamInterface( PaUtilStreamInterface *streamInterface,
PaError (*Close)( PaStream* ),
PaError (*Start)( PaStream* ),
PaError (*Stop)( PaStream* ),
PaError (*Abort)( PaStream* ),
PaError (*IsStopped)( PaStream* ),
PaError (*IsActive)( PaStream* ),
PaTime (*GetTime)( PaStream* ),
double (*GetCpuLoad)( PaStream* ),
PaError (*Read)( PaStream*, void *, unsigned long ),
PaError (*Write)( PaStream*, const void *, unsigned long ),
signed long (*GetReadAvailable)( PaStream* ),
signed long (*GetWriteAvailable)( PaStream* ) )
{
streamInterface->Close = Close;
streamInterface->Start = Start;
streamInterface->Stop = Stop;
streamInterface->Abort = Abort;
streamInterface->IsStopped = IsStopped;
streamInterface->IsActive = IsActive;
streamInterface->GetTime = GetTime;
streamInterface->GetCpuLoad = GetCpuLoad;
streamInterface->Read = Read;
streamInterface->Write = Write;
streamInterface->GetReadAvailable = GetReadAvailable;
streamInterface->GetWriteAvailable = GetWriteAvailable;
}
void PaUtil_InitializeStreamRepresentation( PaUtilStreamRepresentation *streamRepresentation,
PaUtilStreamInterface *streamInterface,
PaStreamCallback *streamCallback,
void *userData )
{
streamRepresentation->magic = PA_STREAM_MAGIC;
streamRepresentation->nextOpenStream = 0;
streamRepresentation->streamInterface = streamInterface;
streamRepresentation->streamCallback = streamCallback;
streamRepresentation->streamFinishedCallback = 0;
streamRepresentation->userData = userData;
streamRepresentation->streamInfo.inputLatency = 0.;
streamRepresentation->streamInfo.outputLatency = 0.;
streamRepresentation->streamInfo.sampleRate = 0.;
}
void PaUtil_TerminateStreamRepresentation( PaUtilStreamRepresentation *streamRepresentation )
{
streamRepresentation->magic = 0;
}
PaError PaUtil_DummyRead( PaStream* stream,
void *buffer,
unsigned long frames )
{
(void)stream; /* unused parameter */
(void)buffer; /* unused parameter */
(void)frames; /* unused parameter */
return paCanNotReadFromACallbackStream;
}
PaError PaUtil_DummyWrite( PaStream* stream,
const void *buffer,
unsigned long frames )
{
(void)stream; /* unused parameter */
(void)buffer; /* unused parameter */
(void)frames; /* unused parameter */
return paCanNotWriteToACallbackStream;
}
signed long PaUtil_DummyGetReadAvailable( PaStream* stream )
{
(void)stream; /* unused parameter */
return paCanNotReadFromACallbackStream;
}
signed long PaUtil_DummyGetWriteAvailable( PaStream* stream )
{
(void)stream; /* unused parameter */
return paCanNotWriteToACallbackStream;
}
double PaUtil_DummyGetCpuLoad( PaStream* stream )
{
(void)stream; /* unused parameter */
return 0.0;
}

Get latest updates about Open Source Projects, Conferences and News.

Sign up for the SourceForge newsletter:





No, thanks