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
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* wavfile.cc
*
* Mi 20. Jan 16:57:16 CET 2016
* Copyright 2016 Christian Glöckner
* cgloeckner@freenet.de
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* DrumGizmo 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include <iostream>
#include "wavfile.h"
WavfileOutputEngine::WavfileOutputEngine() : info{}, channels{}, file{"output"}
{
info.frames = 0;
info.samplerate = 44100;
info.channels = 1;
info.format = SF_FORMAT_WAV | SF_FORMAT_FLOAT;
info.sections = 0;
info.seekable = 0;
}
WavfileOutputEngine::~WavfileOutputEngine()
{
for (auto &ptr : channels)
{
if (ptr != nullptr)
{
sf_close(ptr);
}
}
}
bool WavfileOutputEngine::init(Channels data)
{
channels.clear(), channels.resize(data.size()); // value-initialized with null
for (auto i = 0u; i < data.size(); ++i)
{
// write channel to file
auto fname = file + data[i].name + "-" + std::to_string(i) + ".wav";
channels[i] = sf_open(fname.c_str(), SFM_WRITE, &info);
if (channels[i] == nullptr)
{
std::cerr << "[WaffileOutputEngine] Failed to initialize "
<< "channel #" << i << "\n";
return false;
}
}
return true;
}
void WavfileOutputEngine::setParm(std::string parm, std::string value)
{
if (parm == "file")
{
// apply output filename prefix
file = value;
}
else if (parm == "srate")
{
// try to apply samplerate
try
{
info.samplerate = std::stoi(value);
}
catch (...)
{
std::cerr << "[WavfileOutputEngine] Invalid samplerate " << value << "\n";
}
}
else
{
std::cerr << "[WavfileOutputEngine] Unsupported parameter '" << parm
<< "'\n";
}
}
bool WavfileOutputEngine::start() { return true; }
void WavfileOutputEngine::stop() {}
void WavfileOutputEngine::pre(size_t nsamples) {}
void WavfileOutputEngine::run(int ch, sample_t *samples, size_t nsamples)
{
if (static_cast<unsigned int>(ch) >= channels.size())
{
std::cerr << "[WavfileOutputEngine] cannot access channel #" << ch << " ("
<< channels.size() << " channels available)\n";
return;
}
sf_writef_float(channels[ch], samples, nsamples);
}
void WavfileOutputEngine::post(size_t nsamples) {}
size_t WavfileOutputEngine::samplerate() { return info.samplerate; }
|
