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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* cacheaudiofile.cc
*
* Thu Dec 24 12:17:58 CET 2015
* Copyright 2015 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 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 "audiocachefile.h"
#include <assert.h>
#include <hugin.hpp>
#include <cstring>
#include "audiocache.h"
AudioCacheFile::AudioCacheFile(const std::string& filename,
std::vector<sample_t>& read_buffer)
: filename(filename), read_buffer(read_buffer)
{
std::memset(&sf_info, 0, sizeof(SF_INFO));
fh = sf_open(filename.c_str(), SFM_READ, &sf_info);
if(!fh)
{
ERR(audiofile,"SNDFILE Error (%s): %s\n",
filename.c_str(), sf_strerror(fh));
return;
}
if(sf_info.frames == 0)
{
WARN(cache, "sf_info.frames == 0\n");
}
}
AudioCacheFile::~AudioCacheFile()
{
if(fh)
{
sf_close(fh);
fh = nullptr;
}
}
size_t AudioCacheFile::getSize() const
{
return sf_info.frames;
}
const std::string& AudioCacheFile::getFilename() const
{
return filename;
}
size_t AudioCacheFile::getChannelCount()
{
return sf_info.channels;
}
void AudioCacheFile::readChunk(const CacheChannels& channels,
size_t pos, size_t num_samples)
{
//assert(fh != nullptr); // File handle must never be nullptr
if(!fh)
{
return;
}
if((int)pos > sf_info.frames)
{
WARN(cache, "pos (%d) > sf_info.frames (%d)\n",
(int)pos, (int)sf_info.frames);
return;
}
sf_seek(fh, pos, SEEK_SET);
size_t size = sf_info.frames - pos;
if(size > num_samples)
{
size = num_samples;
}
if((size * sf_info.channels) > read_buffer.size())
{
read_buffer.resize(size * sf_info.channels);
}
size_t read_size = sf_readf_float(fh, read_buffer.data(), size);
(void)read_size;
for(auto it = channels.begin(); it != channels.end(); ++it)
{
size_t channel = it->channel;
sample_t* data = it->samples;
for (size_t i = 0; i < size; ++i)
{
data[i] = read_buffer[(i * sf_info.channels) + channel];
}
}
for(auto it = channels.begin(); it != channels.end(); ++it)
{
*(it->ready) = true;
}
}
AudioCacheFile& AudioCacheFiles::getFile(const std::string& filename)
{
std::lock_guard<std::mutex> lock(mutex);
auto it = audiofiles.find(filename);
if(it == audiofiles.end())
{
it = audiofiles.emplace(std::piecewise_construct, std::make_tuple(filename),
std::make_tuple(filename, std::ref(read_buffer))).first;
}
auto& cache_audio_file = it->second;
// Increase ref count.
++cache_audio_file.ref;
return cache_audio_file;
}
void AudioCacheFiles::releaseFile(const std::string& filename)
{
std::lock_guard<std::mutex> lock(mutex);
auto it = audiofiles.find(filename);
if(it == audiofiles.end())
{
assert(false); // This should never happen!
return; // not open
}
auto& audiofile = it->second;
assert(audiofile.ref); // If ref is not > 0 it shouldn't be in the map.
--audiofile.ref;
if(audiofile.ref == 0)
{
audiofiles.erase(it);
}
}
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