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synth.h
00001 /* 00002 * libmad - MPEG audio decoder library 00003 * Copyright (C) 2000-2004 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 2010/11/23 20:12:57 andy 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
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