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-rw-r--r--src/audiocachefile.cc166
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diff --git a/src/audiocachefile.cc b/src/audiocachefile.cc
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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 "audiocache.h"
+
+AudioCacheFile::AudioCacheFile(const std::string& filename)
+ : filename(filename)
+{
+ 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));
+ }
+
+ if(sf_info.frames == 0)
+ {
+ printf("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(pos > sf_info.frames)
+ {
+ printf("pos (%d) > sf_info.frames (%d)\n", 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;
+ }
+
+ static sample_t *read_buffer = nullptr;
+ static size_t read_buffer_size = 0;
+
+ if((size * sf_info.channels) > read_buffer_size)
+ {
+ delete[] read_buffer;
+ read_buffer_size = size * sf_info.channels;
+ read_buffer = new sample_t[read_buffer_size];
+ // TODO: This buffer is never free'd on app shutdown.
+ }
+
+ size_t read_size = sf_readf_float(fh, read_buffer, 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)
+{
+ AudioCacheFile* cacheAudioFile = nullptr;
+
+ auto it = audiofiles.find(filename);
+ if(it == audiofiles.end())
+ {
+ cacheAudioFile = new AudioCacheFile(filename);
+ audiofiles.insert(std::make_pair(filename, cacheAudioFile));
+ }
+ else
+ {
+ cacheAudioFile = it->second;
+ }
+
+ assert(cacheAudioFile);
+
+ // Increase ref count.
+ ++cacheAudioFile->ref;
+
+ return *cacheAudioFile;
+}
+
+void AudioCacheFiles::releaseFile(const std::string& filename)
+{
+ 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)
+ {
+ delete audiofile;
+ audiofiles.erase(it);
+ }
+}