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Viewing changes to src/core/audio/AudioFileWave.cpp

  • Committer: Bazaar Package Importer
  • Author(s): Alessio Treglia
  • Date: 2010-11-12 13:32:32 UTC
  • mfrom: (1.1.9 upstream) (3.1.8 sid)
  • Revision ID: james.westby@ubuntu.com-20101112133232-vdld83iyji8srqti
Tags: 0.4.7-2ubuntu1
https://launchpad.net/bugs/606533
* Re-sync with Debian (LP: #606533):
  - Replace build-dep on libwine-dev with libwine-dev-unstable to build
    against the newer Wine.

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src/core/audio/AudioFileWave.cpp
 
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/*
 
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 * AudioFileWave.cpp - audio-device which encodes wave-stream and writes it
 
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 *                     into a WAVE-file. This is used for song-export.
 
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 *
 
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 * Copyright (c) 2004-2009 Tobias Doerffel <tobydox/at/users.sourceforge.net>
 
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 *
 
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 * This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
 
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 *
 
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 * This program is free software; you can redistribute it and/or
 
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 * modify it under the terms of the GNU General Public
 
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 * License as published by the Free Software Foundation; either
 
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 * version 2 of the License, or (at your option) any later version.
 
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 *
 
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 * This program is distributed in the hope that it will be useful,
 
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 
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 * General Public License for more details.
 
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 *
 
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 * You should have received a copy of the GNU General Public
 
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 * License along with this program (see COPYING); if not, write to the
 
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 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 
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 * Boston, MA 02110-1301 USA.
 
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 *
 
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 */
 
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#include "AudioFileWave.h"
 
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#include "endian_handling.h"
 
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AudioFileWave::AudioFileWave( const sample_rate_t _sample_rate,
 
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                                const ch_cnt_t _channels, bool & _success_ful,
 
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                                const QString & _file,
 
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                                const bool _use_vbr,
 
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                                const bitrate_t _nom_bitrate,
 
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                                const bitrate_t _min_bitrate,
 
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                                const bitrate_t _max_bitrate,
 
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                                const int _depth,
 
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                                mixer * _mixer ) :
 
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        AudioFileDevice( _sample_rate, _channels, _file, _use_vbr,
 
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                        _nom_bitrate, _min_bitrate, _max_bitrate,
 
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                                                                _depth, _mixer )
 
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{
 
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        _success_ful = startEncoding();
 
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}
 
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AudioFileWave::~AudioFileWave()
 
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{
 
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        finishEncoding();
 
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}
 
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bool AudioFileWave::startEncoding()
 
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{
 
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        m_si.samplerate = sampleRate();
 
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        m_si.channels = channels();
 
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        m_si.frames = getMixer()->framesPerPeriod();
 
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        m_si.sections = 1;
 
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        m_si.seekable = 0;
 
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        switch( depth() )
 
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        {
 
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                case 32: m_si.format = SF_FORMAT_WAV | SF_FORMAT_FLOAT; break;
 
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                case 16:
 
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                default: m_si.format = SF_FORMAT_WAV | SF_FORMAT_PCM_16; break;
 
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        }
 
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        m_sf = sf_open( outputFile().toUtf8().constData(), SFM_WRITE, &m_si );
 
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        return true;
 
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}
 
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void AudioFileWave::writeBuffer( const surroundSampleFrame * _ab,
 
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                                                const fpp_t _frames,
 
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                                                const float _master_gain )
 
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{
 
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        if( depth() == 32 )
 
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        {
 
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                float *  buf = new float[_frames*channels()];
 
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                for( fpp_t frame = 0; frame < _frames; ++frame )
 
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                {
 
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                        for( ch_cnt_t chnl = 0; chnl < channels(); ++chnl )
 
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                        {
 
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                                buf[frame*channels()+chnl] = _ab[frame][chnl] *
 
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                                                                _master_gain;
 
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                        }
 
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                }
 
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                sf_writef_float( m_sf, buf, _frames );
 
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                delete[] buf;
 
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        }
 
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        else
 
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        {
 
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                int_sample_t * buf = new int_sample_t[_frames * channels()];
 
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                convertToS16( _ab, _frames, _master_gain, buf,
 
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                                                        !isLittleEndian() );
 
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                sf_writef_short( m_sf, buf, _frames );
 
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                delete[] buf;
 
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        }
 
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}
 
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void AudioFileWave::finishEncoding()
 
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{
 
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        sf_close( m_sf );
 
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}
 
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