# ----------------------------------------------------------------------------
# pyglet
# Copyright (c) 2006-2008 Alex Holkner
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"""Wrapper for include/libswresample/swresample.h
"""
from ctypes import c_int, c_int64
from ctypes import c_uint8
from ctypes import c_void_p, POINTER, Structure

import pyglet.lib
from pyglet.util import debug_print
from . import compat

_debug = debug_print('debug_media')


try:
    swresample = pyglet.lib.load_library(
        'swresample',
        win32='swresample-4',
        darwin='swresample.4'
    )
    version = 4

except ImportError:
    if _debug:
        print("Failed to load: swresample-4. Trying older version.")

    swresample = pyglet.lib.load_library(
        'swresample',
        win32='swresample-3',
        darwin='swresample.3'
    )
    version = 3

compat.set_version('swresample', version)

SWR_CH_MAX = 32


class SwrContext(Structure):
    pass


swresample.swr_alloc_set_opts.restype = POINTER(SwrContext)
swresample.swr_alloc_set_opts.argtypes = [POINTER(SwrContext),
                                          c_int64, c_int, c_int, c_int64,
                                          c_int, c_int, c_int, c_void_p]
swresample.swr_init.restype = c_int
swresample.swr_init.argtypes = [POINTER(SwrContext)]
swresample.swr_free.argtypes = [POINTER(POINTER(SwrContext))]
swresample.swr_convert.restype = c_int
swresample.swr_convert.argtypes = [POINTER(SwrContext),
                                   POINTER(c_uint8) * SWR_CH_MAX,
                                   c_int,
                                   POINTER(POINTER(c_uint8)),
                                   c_int]
swresample.swr_set_compensation.restype = c_int
swresample.swr_set_compensation.argtypes = [POINTER(SwrContext),
                                            c_int, c_int]
swresample.swr_get_out_samples.restype = c_int
swresample.swr_get_out_samples.argtypes = [POINTER(SwrContext), c_int]

__all__ = [
    'swresample',
    'SWR_CH_MAX',
    'SwrContext'
]