openmv/tools/tflite2c.py

78 lines
3.0 KiB
Python
Executable File

#!/usr/bin/env python3
# This file is part of the OpenMV project.
#
# Copyright (c) 2013-2022 Ibrahim Abdelkader <iabdalkader@openmv.io>
# Copyright (c) 2013-2022 Kwabena W. Agyeman <kwagyeman@openmv.io>
#
# This work is licensed under the MIT license, see the file LICENSE for details.
#
# This script converts tflite models and labels to a C structs.
import sys, os
import glob
import argparse
import binascii
def main():
parser = argparse.ArgumentParser(description='Converts TFLite models to C file.')
parser.add_argument('--input', action = 'store', help = 'Input tflite models directory.', required=True)
parser.add_argument('--header', action = 'store_true', help = 'Generate header file.', required=False, default=False)
args = parser.parse_args()
libtf_builtin_models = []
print('/* NOTE: This file is auto-generated. */\n')
models_list = glob.glob(os.path.join(args.input, "*tflite"))
if (args.header):
# Generate the header file
print('// Built-in TFLite Models.')
print('typedef struct {')
print(' const char *name;')
print(' const unsigned int n_labels;')
print(' const char **labels;')
print(' const unsigned int size;')
print(' const unsigned char *data;')
print('}libtf_builtin_model_t;\n')
print('extern const libtf_builtin_model_t libtf_builtin_models[{:d}];'.format(len(models_list)))
else:
# Generate the C file
print('#include "libtf_builtin_models.h"')
for model_file in models_list:
model_size = os.path.getsize(model_file)
model_name = os.path.basename(os.path.splitext(model_file)[0])
labels_file = os.path.splitext(model_file)[0]+'.txt'
# Generate model labels.
labels = []
n_labels = 0
with open(labels_file, 'r') as f:
labels = ['"{:s}"'.format(l.strip()) for l in f.readlines()]
n_labels = len(labels)
print('const char *libtf_{:s}_labels[] = {{{:s}}};'.format(model_name, ', '.join(labels)))
# Generate model data.
print('const unsigned char libtf_{:s}_data[] = {{'.format(model_name))
with open(model_file, 'rb') as f:
for chunk in iter(lambda: f.read(12), b''):
print(' ', end='')
print(' '.join(['0x{:02x},'.format(x) for x in chunk]))
print('};')
# Store model info in builtin models table.
libtf_builtin_models.append([
model_name,
n_labels,
'libtf_{:s}_labels'.format(model_name),
model_size,
'libtf_{:s}_data'.format(model_name)]
)
# Generate built-in models table.
print('const libtf_builtin_model_t libtf_builtin_models[{:d}] = {{'.format(len(models_list)))
for model in libtf_builtin_models:
print(' {{"{:s}", {:d}, {:s}, {:d}, {:s}}},'.format(*model))
print('};')
if __name__ == '__main__':
main()