summaryrefslogtreecommitdiff
path: root/drumgizmo/output/wavfile.cc
blob: 86e0168ac34e24f6febd3041a03e60fce4c6c68e (plain)
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
/* -*- 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 3 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()
	: AudioOutputEngine{}
	, info{}
	, channels{}
	, file{"output"}
{
	info.samplerate = 44100;
	info.channels = 1;
	info.format = SF_FORMAT_WAV | SF_FORMAT_FLOAT;
}

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;
}