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cdef extern from "c/common.h":
ctypedef int pywt_index_t
cdef void* wtmalloc(long size)
cdef void* wtcalloc(long len, long size)
cdef void wtfree(void* ptr)
ctypedef struct ArrayInfo:
size_t * shape
pywt_index_t * strides
size_t ndim
ctypedef enum Coefficient:
COEF_APPROX = 0
COEF_DETAIL = 1
ctypedef enum DiscreteTransformType:
DWT_TRANSFORM = 0
SWT_TRANSFORM = 1
ctypedef enum MODE:
MODE_INVALID = -1
MODE_ZEROPAD = 0
MODE_SYMMETRIC
MODE_CONSTANT_EDGE
MODE_SMOOTH
MODE_PERIODIC
MODE_PERIODIZATION
MODE_REFLECT
MODE_ANTISYMMETRIC
MODE_ANTIREFLECT
MODE_MAX
# buffers lengths
cdef size_t dwt_buffer_length(size_t input_len, size_t filter_len, MODE mode)
cdef size_t upsampling_buffer_length(size_t coeffs_len, size_t filter_len,
MODE mode)
cdef size_t reconstruction_buffer_length(size_t coeffs_len, size_t filter_len)
cdef size_t idwt_buffer_length(size_t coeffs_len, size_t filter_len, MODE mode)
cdef size_t swt_buffer_length(size_t coeffs_len)
# max dec levels
cdef unsigned char dwt_max_level(size_t input_len, size_t filter_len)
cdef unsigned char swt_max_level(size_t input_len)
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