blob: fbeaf7231a1c06f966773e7a36379bfb92bdc7d8
| 1 | /* |
| 2 | * libmad - MPEG audio decoder library |
| 3 | * Copyright (C) 2000-2004 Underbit Technologies, Inc. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | * |
| 19 | * $Id: synth.h,v 1.15 2004/01/23 09:41:33 rob Exp $ |
| 20 | */ |
| 21 | |
| 22 | # ifndef LIBMAD_SYNTH_H |
| 23 | # define LIBMAD_SYNTH_H |
| 24 | |
| 25 | # include "fixed.h" |
| 26 | # include "frame.h" |
| 27 | |
| 28 | struct mad_pcm { |
| 29 | unsigned int samplerate; /* sampling frequency (Hz) */ |
| 30 | unsigned short channels; /* number of channels */ |
| 31 | unsigned short length; /* number of samples per channel */ |
| 32 | mad_fixed_t samples[2][1152]; /* PCM output samples [ch][sample] */ |
| 33 | }; |
| 34 | |
| 35 | struct mad_synth { |
| 36 | mad_fixed_t filter[2][2][2][16][8]; /* polyphase filterbank outputs */ |
| 37 | /* [ch][eo][peo][s][v] */ |
| 38 | |
| 39 | unsigned int phase; /* current processing phase */ |
| 40 | |
| 41 | struct mad_pcm pcm; /* PCM output */ |
| 42 | }; |
| 43 | |
| 44 | /* single channel PCM selector */ |
| 45 | enum { |
| 46 | MAD_PCM_CHANNEL_SINGLE = 0 |
| 47 | }; |
| 48 | |
| 49 | /* dual channel PCM selector */ |
| 50 | enum { |
| 51 | MAD_PCM_CHANNEL_DUAL_1 = 0, |
| 52 | MAD_PCM_CHANNEL_DUAL_2 = 1 |
| 53 | }; |
| 54 | |
| 55 | /* stereo PCM selector */ |
| 56 | enum { |
| 57 | MAD_PCM_CHANNEL_STEREO_LEFT = 0, |
| 58 | MAD_PCM_CHANNEL_STEREO_RIGHT = 1 |
| 59 | }; |
| 60 | |
| 61 | void mad_synth_init(struct mad_synth *); |
| 62 | |
| 63 | # define mad_synth_finish(synth) /* nothing */ |
| 64 | |
| 65 | void mad_synth_mute(struct mad_synth *); |
| 66 | |
| 67 | void mad_synth_frame(struct mad_synth *, struct mad_frame const *); |
| 68 | |
| 69 | # endif |
| 70 |