andrew@0: /*
andrew@0: ** Copyright (C) 2002-2008 Erik de Castro Lopo <erikd@mega-nerd.com>
andrew@0: **
andrew@0: ** This program is free software; you can redistribute it and/or modify
andrew@0: ** it under the terms of the GNU General Public License as published by
andrew@0: ** the Free Software Foundation; either version 2 of the License, or
andrew@0: ** (at your option) any later version.
andrew@0: **
andrew@0: ** This program is distributed in the hope that it will be useful,
andrew@0: ** but WITHOUT ANY WARRANTY; without even the implied warranty of
andrew@0: ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
andrew@0: ** GNU General Public License for more details.
andrew@0: **
andrew@0: ** You should have received a copy of the GNU General Public License
andrew@0: ** along with this program; if not, write to the Free Software
andrew@0: ** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
andrew@0: */
andrew@0: 
andrew@0: /*
andrew@0: ** This code is part of Secret Rabibt Code aka libsamplerate. A commercial
andrew@0: ** use license for this code is available, please see:
andrew@0: **		http://www.mega-nerd.com/SRC/procedure.html
andrew@0: */
andrew@0: 
andrew@0: #ifndef COMMON_H_INCLUDED
andrew@0: #define COMMON_H_INCLUDED
andrew@0: 
andrew@0: #ifdef HAVE_STDINT_H
andrew@0: #include <stdint.h>
andrew@0: #elif (SIZEOF_INT == 4)
andrew@0: typedef	int		int32_t ;
andrew@0: #elif (SIZEOF_LONG == 4)
andrew@0: typedef	long	int32_t ;
andrew@0: #endif
andrew@0: 
andrew@0: #define	SRC_MAX_RATIO			256
andrew@0: #define	SRC_MIN_RATIO_DIFF		(1e-20)
andrew@0: 
andrew@0: #define	MAX(a,b)	(((a) > (b)) ? (a) : (b))
andrew@0: #define	MIN(a,b)	(((a) < (b)) ? (a) : (b))
andrew@0: 
andrew@0: #define	ARRAY_LEN(x)			((int) (sizeof (x) / sizeof ((x) [0])))
andrew@0: #define OFFSETOF(type,member)	((int) (&((type*) 0)->member))
andrew@0: 
andrew@0: #define	MAKE_MAGIC(a,b,c,d,e,f)	((a) + ((b) << 4) + ((c) << 8) + ((d) << 12) + ((e) << 16) + ((f) << 20))
andrew@0: 
andrew@0: 
andrew@0: #include "samplerate.h"
andrew@0: 
andrew@0: enum
andrew@0: {	SRC_FALSE	= 0,
andrew@0: 	SRC_TRUE	= 1,
andrew@0: 
andrew@0: 	SRC_MODE_PROCESS	= 555,
andrew@0: 	SRC_MODE_CALLBACK	= 556
andrew@0: } ;
andrew@0: 
andrew@0: enum
andrew@0: {	SRC_ERR_NO_ERROR = 0,
andrew@0: 
andrew@0: 	SRC_ERR_MALLOC_FAILED,
andrew@0: 	SRC_ERR_BAD_STATE,
andrew@0: 	SRC_ERR_BAD_DATA,
andrew@0: 	SRC_ERR_BAD_DATA_PTR,
andrew@0: 	SRC_ERR_NO_PRIVATE,
andrew@0: 	SRC_ERR_BAD_SRC_RATIO,
andrew@0: 	SRC_ERR_BAD_PROC_PTR,
andrew@0: 	SRC_ERR_SHIFT_BITS,
andrew@0: 	SRC_ERR_FILTER_LEN,
andrew@0: 	SRC_ERR_BAD_CONVERTER,
andrew@0: 	SRC_ERR_BAD_CHANNEL_COUNT,
andrew@0: 	SRC_ERR_SINC_BAD_BUFFER_LEN,
andrew@0: 	SRC_ERR_SIZE_INCOMPATIBILITY,
andrew@0: 	SRC_ERR_BAD_PRIV_PTR,
andrew@0: 	SRC_ERR_BAD_SINC_STATE,
andrew@0: 	SRC_ERR_DATA_OVERLAP,
andrew@0: 	SRC_ERR_BAD_CALLBACK,
andrew@0: 	SRC_ERR_BAD_MODE,
andrew@0: 	SRC_ERR_NULL_CALLBACK,
andrew@0: 	SRC_ERR_NO_VARIABLE_RATIO,
andrew@0: 
andrew@0: 	/* This must be the last error number. */
andrew@0: 	SRC_ERR_MAX_ERROR
andrew@0: } ;
andrew@0: 
andrew@0: typedef struct SRC_PRIVATE_tag
andrew@0: {	double	last_ratio, last_position ;
andrew@0: 
andrew@0: 	int		error ;
andrew@0: 	int		channels ;
andrew@0: 
andrew@0: 	/* SRC_MODE_PROCESS or SRC_MODE_CALLBACK */
andrew@0: 	int		mode ;
andrew@0: 
andrew@0: 	/* Pointer to data to converter specific data. */
andrew@0: 	void	*private_data ;
andrew@0: 
andrew@0: 	/* Varispeed process function. */
andrew@0: 	int		(*vari_process) (struct SRC_PRIVATE_tag *psrc, SRC_DATA *data) ;
andrew@0: 
andrew@0: 	/* Constant speed process function. */
andrew@0: 	int		(*const_process) (struct SRC_PRIVATE_tag *psrc, SRC_DATA *data) ;
andrew@0: 
andrew@0: 	/* State reset. */
andrew@0: 	void	(*reset) (struct SRC_PRIVATE_tag *psrc) ;
andrew@0: 
andrew@0: 	/* Data specific to SRC_MODE_CALLBACK. */
andrew@0: 	src_callback_t	callback_func ;
andrew@0: 	void			*user_callback_data ;
andrew@0: 	long			saved_frames ;
andrew@0: 	float			*saved_data ;
andrew@0: } SRC_PRIVATE ;
andrew@0: 
andrew@0: /* In src_sinc.c */
andrew@0: const char* sinc_get_name (int src_enum) ;
andrew@0: const char* sinc_get_description (int src_enum) ;
andrew@0: 
andrew@0: int sinc_set_converter (SRC_PRIVATE *psrc, int src_enum) ;
andrew@0: 
andrew@0: /* In src_linear.c */
andrew@0: const char* linear_get_name (int src_enum) ;
andrew@0: const char* linear_get_description (int src_enum) ;
andrew@0: 
andrew@0: int linear_set_converter (SRC_PRIVATE *psrc, int src_enum) ;
andrew@0: 
andrew@0: /* In src_zoh.c */
andrew@0: const char* zoh_get_name (int src_enum) ;
andrew@0: const char* zoh_get_description (int src_enum) ;
andrew@0: 
andrew@0: int zoh_set_converter (SRC_PRIVATE *psrc, int src_enum) ;
andrew@0: 
andrew@0: /*----------------------------------------------------------
andrew@0: **	Common static inline functions.
andrew@0: */
andrew@0: 
andrew@0: static inline double
andrew@0: fmod_one (double x)
andrew@0: {	double res ;
andrew@0: 
andrew@0: 	res = x - lrint (x) ;
andrew@0: 	if (res < 0.0)
andrew@0: 		return res + 1.0 ;
andrew@0: 
andrew@0: 	return res ;
andrew@0: } /* fmod_one */
andrew@0: 
andrew@0: #endif	/* COMMON_H_INCLUDED */
andrew@0: