cannam@85: /*
cannam@85:  * libmad - MPEG audio decoder library
cannam@85:  * Copyright (C) 2000-2004 Underbit Technologies, Inc.
cannam@85:  *
cannam@85:  * This program is free software; you can redistribute it and/or modify
cannam@85:  * it under the terms of the GNU General Public License as published by
cannam@85:  * the Free Software Foundation; either version 2 of the License, or
cannam@85:  * (at your option) any later version.
cannam@85:  *
cannam@85:  * This program is distributed in the hope that it will be useful,
cannam@85:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
cannam@85:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
cannam@85:  * GNU General Public License for more details.
cannam@85:  *
cannam@85:  * You should have received a copy of the GNU General Public License
cannam@85:  * along with this program; if not, write to the Free Software
cannam@85:  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
cannam@85:  *
cannam@85:  * $Id: decoder.h,v 1.17 2004/01/23 09:41:32 rob Exp $
cannam@85:  */
cannam@85: 
cannam@85: # ifndef LIBMAD_DECODER_H
cannam@85: # define LIBMAD_DECODER_H
cannam@85: 
cannam@85: # include "stream.h"
cannam@85: # include "frame.h"
cannam@85: # include "synth.h"
cannam@85: 
cannam@85: enum mad_decoder_mode {
cannam@85:   MAD_DECODER_MODE_SYNC  = 0,
cannam@85:   MAD_DECODER_MODE_ASYNC
cannam@85: };
cannam@85: 
cannam@85: enum mad_flow {
cannam@85:   MAD_FLOW_CONTINUE = 0x0000,	/* continue normally */
cannam@85:   MAD_FLOW_STOP     = 0x0010,	/* stop decoding normally */
cannam@85:   MAD_FLOW_BREAK    = 0x0011,	/* stop decoding and signal an error */
cannam@85:   MAD_FLOW_IGNORE   = 0x0020	/* ignore the current frame */
cannam@85: };
cannam@85: 
cannam@85: struct mad_decoder {
cannam@85:   enum mad_decoder_mode mode;
cannam@85: 
cannam@85:   int options;
cannam@85: 
cannam@85:   struct {
cannam@85:     long pid;
cannam@85:     int in;
cannam@85:     int out;
cannam@85:   } async;
cannam@85: 
cannam@85:   struct {
cannam@85:     struct mad_stream stream;
cannam@85:     struct mad_frame frame;
cannam@85:     struct mad_synth synth;
cannam@85:   } *sync;
cannam@85: 
cannam@85:   void *cb_data;
cannam@85: 
cannam@85:   enum mad_flow (*input_func)(void *, struct mad_stream *);
cannam@85:   enum mad_flow (*header_func)(void *, struct mad_header const *);
cannam@85:   enum mad_flow (*filter_func)(void *,
cannam@85: 			       struct mad_stream const *, struct mad_frame *);
cannam@85:   enum mad_flow (*output_func)(void *,
cannam@85: 			       struct mad_header const *, struct mad_pcm *);
cannam@85:   enum mad_flow (*error_func)(void *, struct mad_stream *, struct mad_frame *);
cannam@85:   enum mad_flow (*message_func)(void *, void *, unsigned int *);
cannam@85: };
cannam@85: 
cannam@85: void mad_decoder_init(struct mad_decoder *, void *,
cannam@85: 		      enum mad_flow (*)(void *, struct mad_stream *),
cannam@85: 		      enum mad_flow (*)(void *, struct mad_header const *),
cannam@85: 		      enum mad_flow (*)(void *,
cannam@85: 					struct mad_stream const *,
cannam@85: 					struct mad_frame *),
cannam@85: 		      enum mad_flow (*)(void *,
cannam@85: 					struct mad_header const *,
cannam@85: 					struct mad_pcm *),
cannam@85: 		      enum mad_flow (*)(void *,
cannam@85: 					struct mad_stream *,
cannam@85: 					struct mad_frame *),
cannam@85: 		      enum mad_flow (*)(void *, void *, unsigned int *));
cannam@85: int mad_decoder_finish(struct mad_decoder *);
cannam@85: 
cannam@85: # define mad_decoder_options(decoder, opts)  \
cannam@85:     ((void) ((decoder)->options = (opts)))
cannam@85: 
cannam@85: int mad_decoder_run(struct mad_decoder *, enum mad_decoder_mode);
cannam@85: int mad_decoder_message(struct mad_decoder *, void *, unsigned int *);
cannam@85: 
cannam@85: # endif