summaryrefslogtreecommitdiff
path: root/src/audiofile.cc
blob: 6fcdcb598bb9f73041dddb39d93fd85ebff1a143 (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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            audiofile.cc
 *
 *  Tue Jul 22 17:14:11 CEST 2008
 *  Copyright 2008 Bent Bisballe Nyeng
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  This file is part of DrumGizmo.
 *
 *  DrumGizmo 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 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser 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.
 *
 *  Multichannel feature by John Hammen copyright 2014
 */
#include "audiofile.h"

#include <cassert>
#include <sndfile.h>
#include <array>

#include <config.h>

#include <hugin.hpp>

#include "channel.h"

AudioFile::AudioFile(std::string filename, std::size_t filechannel,
                     InstrumentChannel* instrument_channel)
	: filename(std::move(filename))
	, filechannel(filechannel)
	, magic{this}
	, instrument_channel(instrument_channel)
{
}

AudioFile::~AudioFile()
{
	magic = nullptr;
	unload();
}

bool AudioFile::isValid() const
{
	//assert(this == magic);
	return this == magic;
}

void AudioFile::unload()
{
	// Make sure we don't unload the object while loading it...
	const std::lock_guard<std::mutex> guard(mutex);

	is_loaded = false;

	preloadedsize = 0;
	size = 0;
	delete[] data;
	data = nullptr;
}

constexpr std::size_t buffer_size{4096};

void AudioFile::load(const LogFunction& logger, std::size_t sample_limit)
{
	// Make sure we don't unload the object while loading it...
	const std::lock_guard<std::mutex> guard(mutex);

	if(this->data != nullptr) // already loaded
	{
		return;
	}

	SF_INFO sf_info{};
	SNDFILE *file_handle = sf_open(filename.c_str(), SFM_READ, &sf_info);
	if(file_handle == nullptr)
	{
		ERR(audiofile,"SNDFILE Error (%s): %s\n",
		    filename.c_str(), sf_strerror(file_handle));
		if(logger)
		{
			logger(LogLevel::Warning, "Could not load '" + filename +
			       "': " + sf_strerror(file_handle));
		}
		return;
	}

	if(sf_info.channels < 1)
	{
		// This should never happen but lets check just in case.
		if(logger)
		{
			logger(LogLevel::Warning, "Could not load '" + filename +
			       "': no audio channels available.");
		}
		return;
	}

	const std::size_t size = sf_info.frames;
	std::size_t preloadedsize = sf_info.frames;

	if(preloadedsize > sample_limit)
	{
		preloadedsize = sample_limit;
	}

	gsl::owner<sample_t*> data{};
	data = new sample_t[preloadedsize];
	if(sf_info.channels == 1)
	{
		preloadedsize =
			sf_read_float(file_handle, data, static_cast<sf_count_t>(preloadedsize));
	}
	else
	{
		// check filechannel exists
		if(filechannel >= (std::size_t)sf_info.channels)
		{
			if(logger)
			{
				logger(LogLevel::Warning, "Audio file '" + filename +
				       "' does no have " + std::to_string(filechannel + 1) + " channels.");
			}
			filechannel = sf_info.channels - 1;
		}

		std::array<sample_t, buffer_size> buffer{};
		const sf_count_t frame_count{static_cast<sf_count_t>(buffer.size()) /
		                             sf_info.channels};
		std::size_t total_frames_read{};
		std::size_t frames_read{};

		do
		{
			frames_read = static_cast<std::size_t>(
				sf_readf_float(file_handle, buffer.data(), frame_count));
			for(std::size_t i = 0;
	        (i < frames_read) && (total_frames_read < sample_limit);
	        ++i)
	    {
		    data[total_frames_read++] =
			    buffer[i * sf_info.channels + filechannel]; // NOLINT - span
	    }
		}
		while( (frames_read > 0) &&
		       (total_frames_read < preloadedsize) &&
		       (total_frames_read < sample_limit) );

		// set data size to total bytes read
		preloadedsize = total_frames_read;
	}

	sf_close(file_handle);

	this->data = data;
	this->size = size;
	this->preloadedsize = preloadedsize;
	is_loaded = true;
}

bool AudioFile::isLoaded() const
{
	return is_loaded;
}

main_state_t AudioFile::mainState() const
{
	if(instrument_channel == nullptr)
	{
		DEBUG(audiofile, "no instrument_channel!");
		return main_state_t::unset;
	}

	return instrument_channel->main;
}