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1 /*
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2 * libmad - MPEG audio decoder library
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3 * Copyright (C) 2000-2004 Underbit Technologies, Inc.
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4 *
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5 * This program is free software; you can redistribute it and/or modify
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6 * it under the terms of the GNU General Public License as published by
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7 * the Free Software Foundation; either version 2 of the License, or
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8 * (at your option) any later version.
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9 *
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10 * This program is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * GNU General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU General Public License
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16 * along with this program; if not, write to the Free Software
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17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18 *
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19 * $Id: decoder.h,v 1.17 2004/01/23 09:41:32 rob Exp $
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20 */
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21
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22 # ifndef LIBMAD_DECODER_H
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23 # define LIBMAD_DECODER_H
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24
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25 # include "stream.h"
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26 # include "frame.h"
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27 # include "synth.h"
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28
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29 enum mad_decoder_mode {
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30 MAD_DECODER_MODE_SYNC = 0,
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31 MAD_DECODER_MODE_ASYNC
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32 };
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33
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34 enum mad_flow {
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35 MAD_FLOW_CONTINUE = 0x0000, /* continue normally */
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36 MAD_FLOW_STOP = 0x0010, /* stop decoding normally */
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37 MAD_FLOW_BREAK = 0x0011, /* stop decoding and signal an error */
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38 MAD_FLOW_IGNORE = 0x0020 /* ignore the current frame */
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39 };
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40
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41 struct mad_decoder {
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42 enum mad_decoder_mode mode;
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43
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44 int options;
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45
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46 struct {
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47 long pid;
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48 int in;
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49 int out;
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50 } async;
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51
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52 struct {
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53 struct mad_stream stream;
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54 struct mad_frame frame;
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55 struct mad_synth synth;
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56 } *sync;
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57
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58 void *cb_data;
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59
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60 enum mad_flow (*input_func)(void *, struct mad_stream *);
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61 enum mad_flow (*header_func)(void *, struct mad_header const *);
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62 enum mad_flow (*filter_func)(void *,
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63 struct mad_stream const *, struct mad_frame *);
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64 enum mad_flow (*output_func)(void *,
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65 struct mad_header const *, struct mad_pcm *);
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66 enum mad_flow (*error_func)(void *, struct mad_stream *, struct mad_frame *);
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67 enum mad_flow (*message_func)(void *, void *, unsigned int *);
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68 };
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69
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70 void mad_decoder_init(struct mad_decoder *, void *,
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71 enum mad_flow (*)(void *, struct mad_stream *),
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72 enum mad_flow (*)(void *, struct mad_header const *),
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73 enum mad_flow (*)(void *,
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74 struct mad_stream const *,
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75 struct mad_frame *),
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76 enum mad_flow (*)(void *,
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77 struct mad_header const *,
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78 struct mad_pcm *),
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79 enum mad_flow (*)(void *,
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80 struct mad_stream *,
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81 struct mad_frame *),
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82 enum mad_flow (*)(void *, void *, unsigned int *));
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83 int mad_decoder_finish(struct mad_decoder *);
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84
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85 # define mad_decoder_options(decoder, opts) \
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86 ((void) ((decoder)->options = (opts)))
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87
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88 int mad_decoder_run(struct mad_decoder *, enum mad_decoder_mode);
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89 int mad_decoder_message(struct mad_decoder *, void *, unsigned int *);
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90
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91 # endif
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