160 lines
4.7 KiB
C++
160 lines
4.7 KiB
C++
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/*******************************************************************************/
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/* Copyright (C) 2008 Jonathan Moore Liles */
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/* */
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/* This program is free software; you can redistribute it and/or modify it */
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/* under the terms of the GNU General Public License as published by the */
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/* Free Software Foundation; either version 2 of the License, or (at your */
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/* option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, but WITHOUT */
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for */
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/* more details. */
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/* */
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/* You should have received a copy of the GNU General Public License along */
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/* with This program; see the file COPYING. If not,write to the Free Software */
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/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/*******************************************************************************/
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#pragma once
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#include <stdlib.h>
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#include "types.h"
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#include "Peak.H"
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#include <stdio.h>
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#include "Thread.H"
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class Audio_File;
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class Peakfile;
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class Peaks
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{
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/* true if first block is still being built */
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mutable volatile bool _first_block_pending;
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mutable volatile bool _mipmaps_pending;
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mutable Thread _make_peaks_thread;
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mutable Thread _make_peaks_mipmap_thread;
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static void * make_peaks_mipmap ( void *v );
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static void * make_peaks ( void *v );
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struct peakdata {
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nframes_t chunksize; /* should always be a power of 2 */
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Peak data[];
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};
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struct peakbuffer {
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size_t size; /* total allocation size */
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size_t len; /* number of peaks */
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nframes_t offset; /* starting sample */
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peakdata *buf;
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peakbuffer ( )
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{
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size = len = 0;
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}
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};
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Peakfile *_peakfile;
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class Streamer
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{
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FILE *_fp;
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Peak *_peak;
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int _chunksize;
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int _channels;
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int _index;
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/* not permitted */
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Streamer ( const Streamer &rhs );
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const Streamer &operator= ( const Streamer &rhs );
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public:
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Streamer ( const char *filename, int channels, nframes_t chunksize );
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~Streamer ( );
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void write ( const sample_t *buf, nframes_t nframes );
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};
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class Builder
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{
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FILE *fp;
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off_t last_block_pos;
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const Peaks *_peaks;
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void write_block_header ( nframes_t chunksize );
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public:
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bool make_peaks_mipmap ( void );
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bool make_peaks ( void );
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Builder ( const Peaks *peaks );
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};
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/* FIXME: Is this ever accessed by multiple threads? */
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static peakbuffer _peakbuf;
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Audio_File *_clip;
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mutable float _fpp;
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volatile mutable bool _rescan_needed;
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nframes_t read_peaks ( nframes_t s, nframes_t npeaks, nframes_t chunksize ) const;
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nframes_t read_source_peaks ( Peak *peaks, nframes_t s, nframes_t npeaks, nframes_t chunksize ) const;
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nframes_t read_source_peaks ( Peak *peaks, nframes_t npeaks, nframes_t chunksize ) const;
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nframes_t read_peakfile_peaks ( Peak *peaks, nframes_t s, nframes_t npeaks, nframes_t chunksize ) const;
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Streamer * volatile _peak_writer; /* exists when streaming peaks to disk */
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/* not permitted */
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Peaks ( const Peaks &rhs );
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const Peaks &operator= ( const Peaks &rhs );
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bool current ( void ) const;
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public:
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static bool mipmapped_peakfiles;
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static const int cache_minimum;
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static const int cache_levels;
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static const int cache_step;
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Peaks ( Audio_File *c );
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~Peaks ( );
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Peak *peakbuf ( void ) const { return Peaks::_peakbuf.buf->data; }
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void clip ( Audio_File *c ) { _clip = c; }
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int fill_buffer ( float fpp, nframes_t s, nframes_t e ) const;
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bool peakfile_ready ( void ) const;
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void read ( int X, float *hi, float *lo ) const;
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bool ready ( nframes_t s, nframes_t npeaks, nframes_t chunksize ) const;
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bool make_peaks ( void ) const;
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void make_peaks_asynchronously ( void(*callback)(void*), void *userdata ) const;
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void prepare_for_writing ( void );
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void finish_writing ( void );
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void write ( sample_t *buf, nframes_t nframes );
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bool needs_more_peaks ( void ) const;
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};
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