Chris@0: /*
Chris@0:  * libmad - MPEG audio decoder library
Chris@0:  * Copyright (C) 2000-2004 Underbit Technologies, Inc.
Chris@0:  *
Chris@0:  * This program is free software; you can redistribute it and/or modify
Chris@0:  * it under the terms of the GNU General Public License as published by
Chris@0:  * the Free Software Foundation; either version 2 of the License, or
Chris@0:  * (at your option) any later version.
Chris@0:  *
Chris@0:  * This program is distributed in the hope that it will be useful,
Chris@0:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@0:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Chris@0:  * GNU General Public License for more details.
Chris@0:  *
Chris@0:  * You should have received a copy of the GNU General Public License
Chris@0:  * along with this program; if not, write to the Free Software
Chris@0:  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
Chris@0:  *
Chris@0:  * $Id: decoder.h,v 1.17 2004/01/23 09:41:32 rob Exp $
Chris@0:  */
Chris@0: 
Chris@0: # ifndef LIBMAD_DECODER_H
Chris@0: # define LIBMAD_DECODER_H
Chris@0: 
Chris@0: # include "stream.h"
Chris@0: # include "frame.h"
Chris@0: # include "synth.h"
Chris@0: 
Chris@0: enum mad_decoder_mode {
Chris@0:   MAD_DECODER_MODE_SYNC  = 0,
Chris@0:   MAD_DECODER_MODE_ASYNC
Chris@0: };
Chris@0: 
Chris@0: enum mad_flow {
Chris@0:   MAD_FLOW_CONTINUE = 0x0000,	/* continue normally */
Chris@0:   MAD_FLOW_STOP     = 0x0010,	/* stop decoding normally */
Chris@0:   MAD_FLOW_BREAK    = 0x0011,	/* stop decoding and signal an error */
Chris@0:   MAD_FLOW_IGNORE   = 0x0020	/* ignore the current frame */
Chris@0: };
Chris@0: 
Chris@0: struct mad_decoder {
Chris@0:   enum mad_decoder_mode mode;
Chris@0: 
Chris@0:   int options;
Chris@0: 
Chris@0:   struct {
Chris@0:     long pid;
Chris@0:     int in;
Chris@0:     int out;
Chris@0:   } async;
Chris@0: 
Chris@0:   struct {
Chris@0:     struct mad_stream stream;
Chris@0:     struct mad_frame frame;
Chris@0:     struct mad_synth synth;
Chris@0:   } *sync;
Chris@0: 
Chris@0:   void *cb_data;
Chris@0: 
Chris@0:   enum mad_flow (*input_func)(void *, struct mad_stream *);
Chris@0:   enum mad_flow (*header_func)(void *, struct mad_header const *);
Chris@0:   enum mad_flow (*filter_func)(void *,
Chris@0: 			       struct mad_stream const *, struct mad_frame *);
Chris@0:   enum mad_flow (*output_func)(void *,
Chris@0: 			       struct mad_header const *, struct mad_pcm *);
Chris@0:   enum mad_flow (*error_func)(void *, struct mad_stream *, struct mad_frame *);
Chris@0:   enum mad_flow (*message_func)(void *, void *, unsigned int *);
Chris@0: };
Chris@0: 
Chris@0: void mad_decoder_init(struct mad_decoder *, void *,
Chris@0: 		      enum mad_flow (*)(void *, struct mad_stream *),
Chris@0: 		      enum mad_flow (*)(void *, struct mad_header const *),
Chris@0: 		      enum mad_flow (*)(void *,
Chris@0: 					struct mad_stream const *,
Chris@0: 					struct mad_frame *),
Chris@0: 		      enum mad_flow (*)(void *,
Chris@0: 					struct mad_header const *,
Chris@0: 					struct mad_pcm *),
Chris@0: 		      enum mad_flow (*)(void *,
Chris@0: 					struct mad_stream *,
Chris@0: 					struct mad_frame *),
Chris@0: 		      enum mad_flow (*)(void *, void *, unsigned int *));
Chris@0: int mad_decoder_finish(struct mad_decoder *);
Chris@0: 
Chris@0: # define mad_decoder_options(decoder, opts)  \
Chris@0:     ((void) ((decoder)->options = (opts)))
Chris@0: 
Chris@0: int mad_decoder_run(struct mad_decoder *, enum mad_decoder_mode);
Chris@0: int mad_decoder_message(struct mad_decoder *, void *, unsigned int *);
Chris@0: 
Chris@0: # endif