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
|
/*
* $Id: test_rw.c 1083 2006-08-23 07:30:49Z rossb $
* test_rw.c
* Read input from one stream and write it to another.
*
* Author: Phil Burk, http://www.softsynth.com/portaudio/
*
* This program uses 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.portaudio.com
* 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.
*
* 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include "pablio.h"
/*
** Note that many of the older ISA sound cards on PCs do NOT support
** full duplex audio (simultaneous record and playback).
** And some only support full duplex at lower sample rates.
*/
#define SAMPLE_RATE (44100)
#define NUM_SECONDS (5)
#define SAMPLES_PER_FRAME (2)
#define FRAMES_PER_BLOCK (64)
/* Select whether we will use floats or shorts. */
#if 1
#define SAMPLE_TYPE paFloat32
typedef float SAMPLE;
#else
#define SAMPLE_TYPE paInt16
typedef short SAMPLE;
#endif
/*******************************************************************/
int main(void);
int main(void)
{
int i;
SAMPLE samples[SAMPLES_PER_FRAME * FRAMES_PER_BLOCK];
PaError err;
PABLIO_Stream *aStream;
printf("Full duplex sound test using PortAudio and RingBuffers\n");
fflush(stdout);
/* Open simplified blocking I/O layer on top of PortAudio. */
err = OpenAudioStream( &aStream, SAMPLE_RATE, SAMPLE_TYPE,
(PABLIO_READ_WRITE | PABLIO_STEREO) );
if( err != paNoError ) goto error;
/* Process samples in the foreground. */
for( i=0; i<(NUM_SECONDS * SAMPLE_RATE); i += FRAMES_PER_BLOCK )
{
/* Read one block of data into sample array from audio input. */
ReadAudioStream( aStream, samples, FRAMES_PER_BLOCK );
/* Write that same block of data to output. */
WriteAudioStream( aStream, samples, FRAMES_PER_BLOCK );
}
CloseAudioStream( aStream );
printf("Full duplex sound test complete.\n" );
fflush(stdout);
return 0;
error:
Pa_Terminate();
fprintf( stderr, "An error occured while using the portaudio stream\n" );
fprintf( stderr, "Error number: %d\n", err );
fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
return -1;
}
|