/* * libmad - MPEG audio decoder library * Copyright (C) 2000-2004 Underbit Technologies, Inc. * * This program 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. * * This program 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 this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA * * $Id: synth.h,v 1.15 2004/01/23 09:41:33 rob Exp $ */# ifndef LIBMAD_SYNTH_H# define LIBMAD_SYNTH_H# include "fixed.h"# include "frame.h"struct mad_pcm {  unsigned int samplerate;		/* sampling frequency (Hz) */  unsigned short channels;		/* number of channels */  unsigned short length;		/* number of samples per channel */  mad_fixed_t samples[2][1152];		/* PCM output samples [ch][sample] */};struct mad_synth {  mad_fixed_t filter[2][2][2][16][8];	/* polyphase filterbank outputs */  					/* [ch][eo][peo][s][v] */  unsigned int phase;			/* current processing phase */  struct mad_pcm pcm;			/* PCM output */};/* single channel PCM selector */enum {  MAD_PCM_CHANNEL_SINGLE = 0};/* dual channel PCM selector */enum {  MAD_PCM_CHANNEL_DUAL_1 = 0,  MAD_PCM_CHANNEL_DUAL_2 = 1};/* stereo PCM selector */enum {  MAD_PCM_CHANNEL_STEREO_LEFT  = 0,  MAD_PCM_CHANNEL_STEREO_RIGHT = 1};void mad_synth_init(struct mad_synth *);# define mad_synth_finish(synth)  /* nothing */void mad_synth_mute(struct mad_synth *);void mad_synth_frame(struct mad_synth *, struct mad_frame const *);# endif