Bundle libsamplerate

[audio-libsamplerate.git] / libsamplerate / src / common.h

diff --git a/libsamplerate/src/common.h b/libsamplerate/src/common.h
new file mode 100644 (file)
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--- /dev/null
+++ b/libsamplerate/src/common.h
@@ -0,0 +1,160 @@
+/*
+** Copyright (c) 2002-2016, Erik de Castro Lopo <erikd@mega-nerd.com>
+** 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) ;
+
+       /* 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 */
+