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: decoder.h,v 1.17 2004/01/23 09:41:32 rob Exp $ 20 */ 21 22 # ifndef LIBMAD_DECODER_H 23 # define LIBMAD_DECODER_H 24 25 # include "stream.h" 26 # include "frame.h" 27 # include "synth.h" 28 29 enum mad_decoder_mode { 30 MAD_DECODER_MODE_SYNC = 0, 31 MAD_DECODER_MODE_ASYNC 32 }; 33 34 enum mad_flow { 35 MAD_FLOW_CONTINUE = 0x0000, /* continue normally */ 36 MAD_FLOW_STOP = 0x0010, /* stop decoding normally */ 37 MAD_FLOW_BREAK = 0x0011, /* stop decoding and signal an error */ 38 MAD_FLOW_IGNORE = 0x0020 /* ignore the current frame */ 39 }; 40 41 struct mad_decoder { 42 enum mad_decoder_mode mode; 43 44 int options; 45 46 struct { 47 long pid; 48 int in; 49 int out; 50 } async; 51 52 struct { 53 struct mad_stream stream; 54 struct mad_frame frame; 55 struct mad_synth synth; 56 } *sync; 57 58 void *cb_data; 59 60 enum mad_flow (*input_func)(void *, struct mad_stream *); 61 enum mad_flow (*header_func)(void *, struct mad_header const *); 62 enum mad_flow (*filter_func)(void *, 63 struct mad_stream const *, struct mad_frame *); 64 enum mad_flow (*output_func)(void *, 65 struct mad_header const *, struct mad_pcm *); 66 enum mad_flow (*error_func)(void *, struct mad_stream *, struct mad_frame *); 67 enum mad_flow (*message_func)(void *, void *, unsigned int *); 68 }; 69 70 void mad_decoder_init(struct mad_decoder *, void *, 71 enum mad_flow (*)(void *, struct mad_stream *), 72 enum mad_flow (*)(void *, struct mad_header const *), 73 enum mad_flow (*)(void *, 74 struct mad_stream const *, 75 struct mad_frame *), 76 enum mad_flow (*)(void *, 77 struct mad_header const *, 78 struct mad_pcm *), 79 enum mad_flow (*)(void *, 80 struct mad_stream *, 81 struct mad_frame *), 82 enum mad_flow (*)(void *, void *, unsigned int *)); 83 int mad_decoder_finish(struct mad_decoder *); 84 85 # define mad_decoder_options(decoder, opts) \ 86 ((void) ((decoder)->options = (opts))) 87 88 int mad_decoder_run(struct mad_decoder *, enum mad_decoder_mode); 89 int mad_decoder_message(struct mad_decoder *, void *, unsigned int *); 90 91 # endif 92