/*
 * libmad - MPEG audio decoder library
 * Copyright (C) 2000-2004 Underbit Technologies, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * $Id: decoder.h,v 1.17 2004/01/23 09:41:32 rob Exp $
 */

#ifndef LIBMAD_DECODER_H
#define LIBMAD_DECODER_H

#include "frame.h"
#include "stream.h"
#include "synth.h"

#ifdef __cplusplus
extern "C"
{
#endif

enum mad_decoder_mode { MAD_DECODER_MODE_SYNC = 0, MAD_DECODER_MODE_ASYNC };

enum mad_flow {
	MAD_FLOW_CONTINUE = 0x0000, /* continue normally */
	MAD_FLOW_STOP	  = 0x0010, /* stop decoding normally */
	MAD_FLOW_BREAK	  = 0x0011, /* stop decoding and signal an error */
	MAD_FLOW_IGNORE	  = 0x0020	/* ignore the current frame */
};

struct mad_decoder
{
	enum mad_decoder_mode mode;

	int options;

	struct
	{
		long pid;
		int	 in;
		int	 out;
	} async;

	struct
	{
		struct mad_stream stream;
		struct mad_frame  frame;
		struct mad_synth  synth;
	}* sync;

	void* cb_data;

	enum mad_flow (*input_func)(void*, struct mad_stream*);
	enum mad_flow (*header_func)(void*, struct mad_header const*);
	enum mad_flow (*filter_func)(void*, struct mad_stream const*, struct mad_frame*);
	enum mad_flow (*output_func)(void*, struct mad_header const*, struct mad_pcm*);
	enum mad_flow (*error_func)(void*, struct mad_stream*, struct mad_frame*);
	enum mad_flow (*message_func)(void*, void*, unsigned int*);
};

void mad_decoder_init(
	struct mad_decoder*, void*, enum mad_flow (*)(void*, struct mad_stream*),
	enum mad_flow (*)(void*, struct mad_header const*),
	enum mad_flow (*)(void*, struct mad_stream const*, struct mad_frame*),
	enum mad_flow (*)(void*, struct mad_header const*, struct mad_pcm*),
	enum mad_flow (*)(void*, struct mad_stream*, struct mad_frame*), enum mad_flow (*)(void*, void*, unsigned int*));
int mad_decoder_finish(struct mad_decoder*);

#define mad_decoder_options(decoder, opts) ((void)((decoder)->options = (opts)))

int mad_decoder_run(struct mad_decoder*, enum mad_decoder_mode);
int mad_decoder_message(struct mad_decoder*, void*, unsigned int*);

#ifdef __cplusplus
}
#endif

#endif