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
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set et sw=2 ts=2: */
/***************************************************************************
* source.cc
*
* Thu Sep 25 10:35:39 CEST 2014
* Copyright 2014 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of LibAudioIO.
*
* LibAudioIO is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* LibAudioIO is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with LibAudioIO; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "source.h"
Source::Source(snd_pcm_t *handle, unsigned int _samplerate,
unsigned int _channels, snd_pcm_uframes_t _frames)
{
this->handle = handle;
this->_samplerate = _samplerate;
this->_channels = _channels;
this->_frames = _frames;
}
Source::~Source()
{
snd_pcm_drain(handle);
snd_pcm_close(handle);
}
int Source::readSamples(char *pcm, size_t maxsize)
{
int rc;
rc = snd_pcm_readi(handle, pcm, maxsize / sizeof(short) / _channels);
if(rc == -EPIPE) {
// EPIPE means overrun
snd_pcm_prepare(handle);
return -2;
} else if (rc < 0) {
return -1; // Read Error
}
return rc * sizeof(short) * _channels;
}
unsigned int Source::samplerate()
{
return this->_samplerate;
}
unsigned int Source::channels()
{
return this->_channels;
}
snd_pcm_uframes_t Source::frames()
{
return this->_frames;
}
|
