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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* audiofile.h
*
* 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 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.
*/
#ifndef __DRUMGIZMO_AUDIOFILE_H__
#define __DRUMGIZMO_AUDIOFILE_H__
#include <string>
#include <map>
#include <vector>
#include <sndfile.h>
#include "mutex.h"
#include "audio.h"
/*
Plan for lazy loading of audio (Brainstorming)
* Encapsulate data array?
- Speed issues?
- Other suggestion
* Trigger on read begin and read done
- readnext(instrument)?
* size_t current latest loaded sample
* run in own thread? threads in drumgizmo??
- Add soundfile-loader-class which run in its own thread
* Add pre-loading constant
* Pointer to pos in audio stream (maybe just last position read)
* Strategy for how to handle pre-loading of remaining file
- Is it acceptable only to handle sequential reading of data (no random access)?
Thread A Thread B
:preload constant (user defined)
:speed modifier constant (in which time must
sample n be loaded relative to trigger time)
---------- ------
| Loader | <------- Trigger load of InstrumentSample n --------- | DG |
---------- ------
Load (int- right most loaded sample --> If current sample pos loaded
| --------- | |
Wave Into --> | SndFile | <----- Read data (directly from array)
---------
*/
//#define LAZYLOAD
#define ALL_SAMPLES -1
class AudioFile {
public:
AudioFile(std::string filename, int filechannel);
~AudioFile();
void load(int num_samples = ALL_SAMPLES);
void unload();
bool isLoaded();
volatile size_t size;
volatile sample_t *data;
std::string filename;
#ifdef LAZYLOAD
// SF_INFO sf_info;
// SNDFILE *fh;
// bool completely_loaded;
void init();
void reset();
void loadNext();
sample_t* preloaded_data;
#endif/*LAZYLOAD*/
bool isValid();
Mutex mutex;
private:
void *magic;
volatile bool is_loaded;
int filechannel;
};
#endif/*__DRUMGIZMO_AUDIOFILE_H__*/
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