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ARQ WIP - prepared data frame factory for compression flags

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DJ2LS 2023-12-25 12:27:48 +01:00
parent 43fdd83178
commit d91b7763e8
1 changed files with 11 additions and 5 deletions
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16
modem/data_frame_factory.py
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@ -7,14 +7,14 @@ class DataFrameFactory:
LENGTH_SIG0_FRAME = 14
LENGTH_SIG1_FRAME = 14
"""
helpers.set_flag(byte, 'DATA-ACK-NACK', True, FLAG_POSITIONS)
helpers.get_flag(byte, 'DATA-ACK-NACK', FLAG_POSITIONS)
"""
ARQ_FLAGS = {
'FINAL': 0, # Bit position for indicating the FINAL state
'CHECKSUM': 1, # Bit position for indicating the CHECKSUM is correct or not
'FINAL': 0, # Bit-position for indicating the FINAL state
'CHECKSUM': 1, # Bit-position for indicating the CHECKSUM is correct or not
'ENABLE_COMPRESSION': 2 # Bit-position for indicating compression is enabled
}
def __init__(self, config):
@ -115,6 +115,7 @@ class DataFrameFactory:
"total_length": 4,
"total_crc": 4,
"snr": 1,
"flag": 1,
}
self.template_list[FR_TYPE.ARQ_SESSION_INFO_ACK.value] = {
@ -238,7 +239,6 @@ class DataFrameFactory:
return extracted_data
def get_bytes_per_frame(self, mode: codec2.FREEDV_MODE) -> int:
freedv = codec2.open_instance(mode.value)
bytes_per_frame = int(codec2.api.freedv_get_bits_per_modem_frame(freedv) / 8)
@ -342,12 +342,18 @@ class DataFrameFactory:
}
return self.construct(FR_TYPE.ARQ_SESSION_OPEN_ACK, payload)
def build_arq_session_info(self, session_id: int, total_length: int, total_crc: bytes, snr):
def build_arq_session_info(self, session_id: int, total_length: int, total_crc: bytes, snr, flag_compression=False):
flag = 0b00000000
if flag_compression:
flag = helpers.set_flag(flag, 'ENABLE_COMPRESSION', True, self.ARQ_FLAGS)
payload = {
"session_id": session_id.to_bytes(1, 'big'),
"total_length": total_length.to_bytes(4, 'big'),
"total_crc": total_crc,
"snr": helpers.snr_to_bytes(1),
"flag": flag.to_bytes(1, 'big'),
}
return self.construct(FR_TYPE.ARQ_SESSION_INFO, payload)