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
|
#ifndef _PABLIO_H
#define _PABLIO_H
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
/*
* $Id: pablio.h,v 1.1.1.2 2003-05-09 16:03:59 ggeiger Exp $
* PABLIO.h
* Portable Audio Blocking read/write utility.
*
* Author: Phil Burk, http://www.softsynth.com/portaudio/
*
* Include file for PABLIO, the Portable Audio Blocking I/O Library.
* PABLIO is built on top of PortAudio, the Portable Audio Library.
* For more information see: 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.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "portaudio.h"
#include "ringbuffer.h"
#include <string.h>
typedef struct
{
RingBuffer inFIFO;
RingBuffer outFIFO;
PortAudioStream *stream;
int bytesPerFrame;
int samplesPerFrame;
}
PABLIO_Stream;
/* Values for flags for OpenAudioStream(). */
#define PABLIO_READ (1<<0)
#define PABLIO_WRITE (1<<1)
#define PABLIO_READ_WRITE (PABLIO_READ|PABLIO_WRITE)
#define PABLIO_MONO (1<<2)
#define PABLIO_STEREO (1<<3)
/************************************************************
* Write data to ring buffer.
* Will not return until all the data has been written.
*/
long WriteAudioStream( PABLIO_Stream *aStream, void *data, long numFrames );
/************************************************************
* Read data from ring buffer.
* Will not return until all the data has been read.
*/
long ReadAudioStream( PABLIO_Stream *aStream, void *data, long numFrames );
/************************************************************
* Return the number of frames that could be written to the stream without
* having to wait.
*/
long GetAudioStreamWriteable( PABLIO_Stream *aStream );
/************************************************************
* Return the number of frames that are available to be read from the
* stream without having to wait.
*/
long GetAudioStreamReadable( PABLIO_Stream *aStream );
/************************************************************
* Opens a PortAudio stream with default characteristics.
* Allocates PABLIO_Stream structure.
*
* flags parameter can be an ORed combination of:
* PABLIO_READ, PABLIO_WRITE, or PABLIO_READ_WRITE,
* and either PABLIO_MONO or PABLIO_STEREO
*/
PaError OpenAudioStream( PABLIO_Stream **aStreamPtr, double sampleRate,
PaSampleFormat format, long flags );
PaError CloseAudioStream( PABLIO_Stream *aStream );
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* _PABLIO_H */
|
