ref: 09fde33f4e4d8c5c0163c42230e84ff8c9016afb
dir: /src/common.h/
/* ** Copyright (c) 2002-2016, Erik de Castro Lopo <[email protected]> ** All rights reserved. ** ** This code is released under 2-clause BSD license. Please see the ** file at : https://github.com/erikd/libsamplerate/blob/master/COPYING */ #ifndef COMMON_H_INCLUDED #define COMMON_H_INCLUDED #ifdef HAVE_STDINT_H #include <stdint.h> #elif (SIZEOF_INT == 4) typedef int int32_t ; #elif (SIZEOF_LONG == 4) typedef long int32_t ; #endif #define SRC_MAX_RATIO 256 #define SRC_MAX_RATIO_STR "256" #define SRC_MIN_RATIO_DIFF (1e-20) #define MAX(a,b) (((a) > (b)) ? (a) : (b)) #define MIN(a,b) (((a) < (b)) ? (a) : (b)) #define ARRAY_LEN(x) ((int) (sizeof (x) / sizeof ((x) [0]))) #define OFFSETOF(type,member) ((int) (&((type*) 0)->member)) #define MAKE_MAGIC(a,b,c,d,e,f) ((a) + ((b) << 4) + ((c) << 8) + ((d) << 12) + ((e) << 16) + ((f) << 20)) /* ** Inspiration : http://sourcefrog.net/weblog/software/languages/C/unused.html */ #ifdef UNUSED #elif defined (__GNUC__) # define UNUSED(x) UNUSED_ ## x __attribute__ ((unused)) #elif defined (__LCLINT__) # define UNUSED(x) /*@unused@*/ x #else # define UNUSED(x) x #endif #ifdef __GNUC__ # define WARN_UNUSED __attribute__ ((warn_unused_result)) #else # define WARN_UNUSED #endif #include "samplerate.h" enum { SRC_FALSE = 0, SRC_TRUE = 1, SRC_MODE_PROCESS = 555, SRC_MODE_CALLBACK = 556 } ; enum { SRC_ERR_NO_ERROR = 0, SRC_ERR_MALLOC_FAILED, SRC_ERR_BAD_STATE, SRC_ERR_BAD_DATA, SRC_ERR_BAD_DATA_PTR, SRC_ERR_NO_PRIVATE, SRC_ERR_BAD_SRC_RATIO, SRC_ERR_BAD_PROC_PTR, SRC_ERR_SHIFT_BITS, SRC_ERR_FILTER_LEN, SRC_ERR_BAD_CONVERTER, SRC_ERR_BAD_CHANNEL_COUNT, SRC_ERR_SINC_BAD_BUFFER_LEN, SRC_ERR_SIZE_INCOMPATIBILITY, SRC_ERR_BAD_PRIV_PTR, SRC_ERR_BAD_SINC_STATE, SRC_ERR_DATA_OVERLAP, SRC_ERR_BAD_CALLBACK, SRC_ERR_BAD_MODE, SRC_ERR_NULL_CALLBACK, SRC_ERR_NO_VARIABLE_RATIO, SRC_ERR_SINC_PREPARE_DATA_BAD_LEN, SRC_ERR_BAD_INTERNAL_STATE, /* This must be the last error number. */ SRC_ERR_MAX_ERROR } ; typedef struct SRC_PRIVATE_tag { double last_ratio, last_position ; int error ; int channels ; /* SRC_MODE_PROCESS or SRC_MODE_CALLBACK */ int mode ; /* Pointer to data to converter specific data. */ void *private_data ; /* Varispeed process function. */ int (*vari_process) (struct SRC_PRIVATE_tag *psrc, SRC_DATA *data) ; /* Constant speed process function. */ int (*const_process) (struct SRC_PRIVATE_tag *psrc, SRC_DATA *data) ; /* State reset. */ void (*reset) (struct SRC_PRIVATE_tag *psrc) ; /* State clone. */ int (*copy) (struct SRC_PRIVATE_tag *from, struct SRC_PRIVATE_tag *to) ; /* Data specific to SRC_MODE_CALLBACK. */ src_callback_t callback_func ; void *user_callback_data ; long saved_frames ; const float *saved_data ; } SRC_PRIVATE ; /* In src_sinc.c */ const char* sinc_get_name (int src_enum) ; const char* sinc_get_description (int src_enum) ; int sinc_set_converter (SRC_PRIVATE *psrc, int src_enum) ; /* In src_linear.c */ const char* linear_get_name (int src_enum) ; const char* linear_get_description (int src_enum) ; int linear_set_converter (SRC_PRIVATE *psrc, int src_enum) ; /* In src_zoh.c */ const char* zoh_get_name (int src_enum) ; const char* zoh_get_description (int src_enum) ; int zoh_set_converter (SRC_PRIVATE *psrc, int src_enum) ; /*---------------------------------------------------------- ** Common static inline functions. */ static inline double fmod_one (double x) { double res ; res = x - lrint (x) ; if (res < 0.0) return res + 1.0 ; return res ; } /* fmod_one */ static inline int is_bad_src_ratio (double ratio) { return (ratio < (1.0 / SRC_MAX_RATIO) || ratio > (1.0 * SRC_MAX_RATIO)) ; } /* is_bad_src_ratio */ #endif /* COMMON_H_INCLUDED */