mirror of
https://github.com/cookiengineer/audacity
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70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/*
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* libmad - MPEG audio decoder library
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* Copyright (C) 2000-2004 Underbit Technologies, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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
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* GNU 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 License
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* along with this program; 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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* $Id: synth.h,v 1.2 2005-09-12 07:01:30 dmazzoni Exp $
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*/
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# ifndef LIBMAD_SYNTH_H
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# define LIBMAD_SYNTH_H
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# include "fixed.h"
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# include "frame.h"
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struct mad_pcm {
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unsigned int samplerate; /* sampling frequency (Hz) */
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unsigned short channels; /* number of channels */
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unsigned short length; /* number of samples per channel */
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mad_fixed_t samples[2][1152]; /* PCM output samples [ch][sample] */
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};
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struct mad_synth {
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mad_fixed_t filter[2][2][2][16][8]; /* polyphase filterbank outputs */
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/* [ch][eo][peo][s][v] */
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unsigned int phase; /* current processing phase */
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struct mad_pcm pcm; /* PCM output */
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};
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/* single channel PCM selector */
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enum {
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MAD_PCM_CHANNEL_SINGLE = 0
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};
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/* dual channel PCM selector */
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enum {
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MAD_PCM_CHANNEL_DUAL_1 = 0,
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MAD_PCM_CHANNEL_DUAL_2 = 1
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};
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/* stereo PCM selector */
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enum {
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MAD_PCM_CHANNEL_STEREO_LEFT = 0,
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MAD_PCM_CHANNEL_STEREO_RIGHT = 1
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};
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void mad_synth_init(struct mad_synth *);
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# define mad_synth_finish(synth) /* nothing */
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void mad_synth_mute(struct mad_synth *);
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void mad_synth_frame(struct mad_synth *, struct mad_frame const *);
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# endif
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