circuitpython/shared-bindings/qrio/QRDecoder.c

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/*
* This file is part of the CircuitPython project, https://github.com/adafruit/circuitpython
*
* The MIT License (MIT)
*
* Copyright (c) 2021 Jeff Epler
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "shared-bindings/qrio/__init__.h"
#include "shared-bindings/qrio/QRDecoder.h"
#include "shared-module/qrio/QRDecoder.h"
#include "py/obj.h"
#include "py/objproperty.h"
#include "py/enum.h"
//| class QRDecoder:
//| def __init__(self, width: int, height: int) -> None:
//| """Construct a QRDecoder object
//|
//| :param int width: The pixel width of the image to decode
//| :param int height: The pixel height of the image to decode
//| """
//| ...
STATIC mp_obj_t qrio_qrdecoder_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args_in) {
enum { ARG_width, ARG_height };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_width, MP_ARG_INT | MP_ARG_REQUIRED, {.u_int = 0} },
{ MP_QSTR_height, MP_ARG_INT | MP_ARG_REQUIRED, {.u_int = 0} },
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all_kw_array(n_args, n_kw, args_in, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
qrio_qrdecoder_obj_t *self = mp_obj_malloc(qrio_qrdecoder_obj_t, &qrio_qrdecoder_type_obj);
shared_module_qrio_qrdecoder_construct(self, args[ARG_width].u_int, args[ARG_height].u_int);
return self;
}
STATIC void verify_buffer_size(qrio_qrdecoder_obj_t *self, mp_obj_t *buffer, size_t len, qrio_pixel_policy_t policy) {
int width = shared_module_qrio_qrdecoder_get_width(self);
int height = shared_module_qrio_qrdecoder_get_height(self);
// verify that the buffer is big enough
int sz = width * height;
if (policy != QRIO_EVERY_BYTE) {
sz *= 2;
}
mp_get_index(mp_obj_get_type(*buffer), len, MP_OBJ_NEW_SMALL_INT(sz - 1), false);
}
//| def decode(
//| self, buffer: ReadableBuffer, pixel_policy: PixelPolicy = PixelPolicy.EVERY_BYTE
//| ) -> List[QRInfo]:
//| """Decode zero or more QR codes from the given image. The size of the buffer must be at least ``length``×``width`` bytes for `EVERY_BYTE`, and 2×``length``×``width`` bytes for `EVEN_BYTES` or `ODD_BYTES`."""
STATIC mp_obj_t qrio_qrdecoder_decode(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
qrio_qrdecoder_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
enum { ARG_buffer, ARG_pixel_policy };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_buffer, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_int = 0} },
{ MP_QSTR_pixel_policy, MP_ARG_OBJ, {.u_obj = MP_ROM_PTR((mp_obj_t *)&qrio_pixel_policy_EVERY_BYTE_obj)} },
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(args[ARG_buffer].u_obj, &bufinfo, MP_BUFFER_READ);
qrio_pixel_policy_t policy = cp_enum_value(&qrio_pixel_policy_type, args[ARG_pixel_policy].u_obj, MP_QSTR_pixel_policy);
verify_buffer_size(self, &args[ARG_buffer].u_obj, bufinfo.len, policy);
return shared_module_qrio_qrdecoder_decode(self, &bufinfo, policy);
}
MP_DEFINE_CONST_FUN_OBJ_KW(qrio_qrdecoder_decode_obj, 1, qrio_qrdecoder_decode);
//| def find(
//| self, buffer: ReadableBuffer, pixel_policy: PixelPolicy = PixelPolicy.EVERY_BYTE
//| ) -> List[QRPosition]:
//| """Find all visible QR codes from the given image. The size of the buffer must be at least ``length``×``width`` bytes for `EVERY_BYTE`, and 2×``length``×``width`` bytes for `EVEN_BYTES` or `ODD_BYTES`."""
STATIC mp_obj_t qrio_qrdecoder_find(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
qrio_qrdecoder_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
enum { ARG_buffer, ARG_pixel_policy };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_buffer, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_int = 0} },
{ MP_QSTR_pixel_policy, MP_ARG_OBJ, {.u_obj = MP_ROM_PTR((mp_obj_t *)&qrio_pixel_policy_EVERY_BYTE_obj)} },
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(args[ARG_buffer].u_obj, &bufinfo, MP_BUFFER_READ);
qrio_pixel_policy_t policy = cp_enum_value(&qrio_pixel_policy_type, args[ARG_pixel_policy].u_obj, MP_QSTR_pixel_policy);
verify_buffer_size(self, &args[ARG_buffer].u_obj, bufinfo.len, policy);
return shared_module_qrio_qrdecoder_find(self, &bufinfo, policy);
}
MP_DEFINE_CONST_FUN_OBJ_KW(qrio_qrdecoder_find_obj, 1, qrio_qrdecoder_find);
//| width: int
//| """The width of image the decoder expects"""
STATIC mp_obj_t qrio_qrdecoder_get_width(mp_obj_t self_in) {
qrio_qrdecoder_obj_t *self = MP_OBJ_TO_PTR(self_in);
return mp_obj_new_int(shared_module_qrio_qrdecoder_get_width(self));
}
MP_DEFINE_CONST_FUN_OBJ_1(qrio_qrdecoder_get_width_obj, qrio_qrdecoder_get_width);
STATIC mp_obj_t qrio_qrdecoder_set_width(mp_obj_t self_in, mp_obj_t width_in) {
qrio_qrdecoder_obj_t *self = MP_OBJ_TO_PTR(self_in);
int width = mp_obj_get_int(width_in);
shared_module_qrio_qrdecoder_set_width(self, width);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_2(qrio_qrdecoder_set_width_obj, qrio_qrdecoder_set_width);
MP_PROPERTY_GETSET(qrio_qrdecoder_width_obj,
(mp_obj_t)&qrio_qrdecoder_get_width_obj,
(mp_obj_t)&qrio_qrdecoder_set_width_obj);
//| height: int
//| """The height of image the decoder expects"""
//|
STATIC mp_obj_t qrio_qrdecoder_get_height(mp_obj_t self_in) {
qrio_qrdecoder_obj_t *self = MP_OBJ_TO_PTR(self_in);
return mp_obj_new_int(shared_module_qrio_qrdecoder_get_height(self));
}
MP_DEFINE_CONST_FUN_OBJ_1(qrio_qrdecoder_get_height_obj, qrio_qrdecoder_get_height);
STATIC mp_obj_t qrio_qrdecoder_set_height(mp_obj_t self_in, mp_obj_t height_in) {
qrio_qrdecoder_obj_t *self = MP_OBJ_TO_PTR(self_in);
int height = mp_obj_get_int(height_in);
shared_module_qrio_qrdecoder_set_height(self, height);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_2(qrio_qrdecoder_set_height_obj, qrio_qrdecoder_set_height);
MP_PROPERTY_GETSET(qrio_qrdecoder_height_obj,
(mp_obj_t)&qrio_qrdecoder_get_height_obj,
(mp_obj_t)&qrio_qrdecoder_set_height_obj);
STATIC const mp_rom_map_elem_t qrio_qrdecoder_locals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_QRDecoder) },
{ MP_ROM_QSTR(MP_QSTR_width), MP_ROM_PTR(&qrio_qrdecoder_width_obj) },
{ MP_ROM_QSTR(MP_QSTR_height), MP_ROM_PTR(&qrio_qrdecoder_height_obj) },
{ MP_ROM_QSTR(MP_QSTR_decode), MP_ROM_PTR(&qrio_qrdecoder_decode_obj) },
{ MP_ROM_QSTR(MP_QSTR_find), MP_ROM_PTR(&qrio_qrdecoder_find_obj) },
};
STATIC MP_DEFINE_CONST_DICT(qrio_qrdecoder_locals, qrio_qrdecoder_locals_table);
MP_DEFINE_CONST_OBJ_TYPE(
qrio_qrdecoder_type_obj,
MP_QSTR_QRDecoder,
MP_TYPE_FLAG_HAS_SPECIAL_ACCESSORS,
make_new, qrio_qrdecoder_make_new,
locals_dict, &qrio_qrdecoder_locals
);