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# synth.h

    00001 /*
    00002  * libmad - MPEG audio decoder library
    00003  * Copyright (C) 2000-2003 Underbit Technologies, Inc.
    00004  *
    00005  * This program is free software; you can redistribute it and/or modify
    00006  * it under the terms of the GNU General Public License as published by
    00007  * the Free Software Foundation; either version 2 of the License, or
    00008  * (at your option) any later version.
    00009  *
    00010  * This program is distributed in the hope that it will be useful,
    00011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00013  * GNU General Public License for more details.
    00014  *
    00015  * You should have received a copy of the GNU General Public License
    00016  * along with this program; if not, write to the Free Software
    00017  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    00018  *
    00019  * $Id: synth.h,v 1.1 2003/08/31 19:00:17 gabest Exp $
    00020  */
    00021
    00022 # ifndef LIBMAD_SYNTH_H
    00023 # define LIBMAD_SYNTH_H
    00024
    00025 # include "fixed.h"
    00026 # include "frame.h"
    00027
    00028 struct mad_pcm {
    00029   unsigned int samplerate;              /* sampling frequency (Hz) */
    00030   unsigned short channels;              /* number of channels */
    00031   unsigned short length;                /* number of samples per channel */
    00032   mad_fixed_t samples[2][1152];         /* PCM output samples [ch][sample] */
    00033 };
    00034
    00035 struct mad_synth {
    00036   mad_fixed_t filter[2][2][2][16][8];   /* polyphase filterbank outputs */
    00037                                         /* [ch][eo][peo][s][v] */
    00038
    00039   unsigned int phase;                   /* current processing phase */
    00040
    00041   struct mad_pcm pcm;                   /* PCM output */
    00042 };
    00043
    00044 /* single channel PCM selector */
    00045 enum {
    00046   MAD_PCM_CHANNEL_SINGLE = 0
    00047 };
    00048
    00049 /* dual channel PCM selector */
    00050 enum {
    00051   MAD_PCM_CHANNEL_DUAL_1 = 0,
    00052   MAD_PCM_CHANNEL_DUAL_2 = 1
    00053 };
    00054
    00055 /* stereo PCM selector */
    00056 enum {
    00057   MAD_PCM_CHANNEL_STEREO_LEFT  = 0,
    00058   MAD_PCM_CHANNEL_STEREO_RIGHT = 1
    00059 };
    00060
    00061 void mad_synth_init(struct mad_synth *);
    00062
    00063 # define mad_synth_finish(synth)  /* nothing */
    00064
    00065 void mad_synth_mute(struct mad_synth *);
    00066
    00067 void mad_synth_frame(struct mad_synth *, struct mad_frame const *);
    00068
    00069 # endif