mirror of
https://github.com/DJ2LS/FreeDATA
synced 2024-05-14 08:04:33 +00:00
improved codec2 mode init
This commit is contained in:
dj2ls
parent
0ab0f444a2
commit
2ed79df2be
206
tnc/modem.py
206
tnc/modem.py
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@ -81,110 +81,52 @@ class RF:
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self.fft_data = bytes()
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# Open codec2 instances
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# Datac0 - control frames
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self.datac0_freedv = ctypes.cast(
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codec2.api.freedv_open(codec2.api.FREEDV_MODE_DATAC0), ctypes.c_void_p
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)
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self.c_lib.freedv_set_tuning_range(
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self.datac0_freedv,
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ctypes.c_float(static.TUNING_RANGE_FMIN),
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ctypes.c_float(static.TUNING_RANGE_FMAX),
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)
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self.datac0_bytes_per_frame = int(
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codec2.api.freedv_get_bits_per_modem_frame(self.datac0_freedv) / 8
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)
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self.datac0_bytes_out = ctypes.create_string_buffer(self.datac0_bytes_per_frame)
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codec2.api.freedv_set_frames_per_burst(self.datac0_freedv, 1)
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self.datac0_buffer = codec2.audio_buffer(2 * self.AUDIO_FRAMES_PER_BUFFER_RX)
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# Additional Datac0-specific information - these are not referenced anywhere else.
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# self.datac0_payload_per_frame = self.datac0_bytes_per_frame - 2
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# self.datac0_n_nom_modem_samples = self.c_lib.freedv_get_n_nom_modem_samples(
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# self.datac0_freedv
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# )
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# self.datac0_n_tx_modem_samples = self.c_lib.freedv_get_n_tx_modem_samples(
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# self.datac0_freedv
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# )
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# self.datac0_n_tx_preamble_modem_samples = (
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# self.c_lib.freedv_get_n_tx_preamble_modem_samples(self.datac0_freedv)
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# )
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# self.datac0_n_tx_postamble_modem_samples = (
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# self.c_lib.freedv_get_n_tx_postamble_modem_samples(self.datac0_freedv)
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# )
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# DATAC0
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self.datac0_freedv, \
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self.datac0_bytes_per_frame, \
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self.datac0_bytes_out, \
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self.datac0_buffer, \
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self.datac0_nin = \
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self.init_codec2_mode(codec2.api.FREEDV_MODE_DATAC0, None)
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# Datac1 - higher-bandwidth data frames
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self.datac1_freedv = ctypes.cast(
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codec2.api.freedv_open(codec2.api.FREEDV_MODE_DATAC1), ctypes.c_void_p
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)
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self.c_lib.freedv_set_tuning_range(
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self.datac1_freedv,
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ctypes.c_float(static.TUNING_RANGE_FMIN),
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ctypes.c_float(static.TUNING_RANGE_FMAX),
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)
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self.datac1_bytes_per_frame = int(
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codec2.api.freedv_get_bits_per_modem_frame(self.datac1_freedv) / 8
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)
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self.datac1_bytes_out = ctypes.create_string_buffer(self.datac1_bytes_per_frame)
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codec2.api.freedv_set_frames_per_burst(self.datac1_freedv, 1)
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self.datac1_buffer = codec2.audio_buffer(2 * self.AUDIO_FRAMES_PER_BUFFER_RX)
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# DATAC1
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self.datac1_freedv, \
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self.datac1_bytes_per_frame, \
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self.datac1_bytes_out, \
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self.datac1_buffer, \
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self.datac1_nin = \
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self.init_codec2_mode(codec2.api.FREEDV_MODE_DATAC1, None)
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# Datac3 - lower-bandwidth data frames
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self.datac3_freedv = ctypes.cast(
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codec2.api.freedv_open(codec2.api.FREEDV_MODE_DATAC3), ctypes.c_void_p
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)
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self.c_lib.freedv_set_tuning_range(
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self.datac3_freedv,
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ctypes.c_float(static.TUNING_RANGE_FMIN),
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ctypes.c_float(static.TUNING_RANGE_FMAX),
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)
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self.datac3_bytes_per_frame = int(
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codec2.api.freedv_get_bits_per_modem_frame(self.datac3_freedv) / 8
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)
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self.datac3_bytes_out = ctypes.create_string_buffer(self.datac3_bytes_per_frame)
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codec2.api.freedv_set_frames_per_burst(self.datac3_freedv, 1)
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self.datac3_buffer = codec2.audio_buffer(2 * self.AUDIO_FRAMES_PER_BUFFER_RX)
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# DATAC3
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self.datac3_freedv, \
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self.datac3_bytes_per_frame, \
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self.datac3_bytes_out, \
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self.datac3_buffer, \
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self.datac3_nin = \
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self.init_codec2_mode(codec2.api.FREEDV_MODE_DATAC3, None)
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# FSK Long-distance Parity Code 0 - data frames
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self.fsk_ldpc_freedv_0 = ctypes.cast(
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codec2.api.freedv_open_advanced(
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# FSK LDPC - 0
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self.fsk_ldpc_freedv_0, \
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self.fsk_ldpc_bytes_per_frame_0, \
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self.fsk_ldpc_bytes_out_0, \
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self.fsk_ldpc_buffer_0, \
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self.fsk_ldpc_nin_0 = \
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self.init_codec2_mode(
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codec2.api.FREEDV_MODE_FSK_LDPC,
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ctypes.byref(codec2.api.FREEDV_MODE_FSK_LDPC_0_ADV),
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),
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ctypes.c_void_p,
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)
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self.fsk_ldpc_bytes_per_frame_0 = int(
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codec2.api.freedv_get_bits_per_modem_frame(self.fsk_ldpc_freedv_0) / 8
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)
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self.fsk_ldpc_bytes_out_0 = ctypes.create_string_buffer(
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self.fsk_ldpc_bytes_per_frame_0
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)
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# codec2.api.freedv_set_frames_per_burst(self.fsk_ldpc_freedv_0, 1)
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self.fsk_ldpc_buffer_0 = codec2.audio_buffer(self.AUDIO_FRAMES_PER_BUFFER_RX)
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codec2.api.FREEDV_MODE_FSK_LDPC_0_ADV
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)
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# FSK Long-distance Parity Code 1 - data frames
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self.fsk_ldpc_freedv_1 = ctypes.cast(
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codec2.api.freedv_open_advanced(
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# FSK LDPC - 1
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self.fsk_ldpc_freedv_1, \
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self.fsk_ldpc_bytes_per_frame_1, \
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self.fsk_ldpc_bytes_out_1, \
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self.fsk_ldpc_buffer_1, \
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self.fsk_ldpc_nin_1 = \
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self.init_codec2_mode(
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codec2.api.FREEDV_MODE_FSK_LDPC,
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ctypes.byref(codec2.api.FREEDV_MODE_FSK_LDPC_1_ADV),
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),
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ctypes.c_void_p,
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)
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self.fsk_ldpc_bytes_per_frame_1 = int(
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codec2.api.freedv_get_bits_per_modem_frame(self.fsk_ldpc_freedv_1) / 8
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)
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self.fsk_ldpc_bytes_out_1 = ctypes.create_string_buffer(
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self.fsk_ldpc_bytes_per_frame_1
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)
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# codec2.api.freedv_set_frames_per_burst(self.fsk_ldpc_freedv_0, 1)
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self.fsk_ldpc_buffer_1 = codec2.audio_buffer(self.AUDIO_FRAMES_PER_BUFFER_RX)
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# initial nin values
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self.datac0_nin = codec2.api.freedv_nin(self.datac0_freedv)
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self.datac1_nin = codec2.api.freedv_nin(self.datac1_freedv)
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self.datac3_nin = codec2.api.freedv_nin(self.datac3_freedv)
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self.fsk_ldpc_nin_0 = codec2.api.freedv_nin(self.fsk_ldpc_freedv_0)
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self.fsk_ldpc_nin_1 = codec2.api.freedv_nin(self.fsk_ldpc_freedv_1)
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# self.log.debug("[MDM] RF: ",datac0_nin=self.datac0_nin)
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codec2.api.FREEDV_MODE_FSK_LDPC_1_ADV
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)
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# --------------------------------------------CREATE PYAUDIO INSTANCE
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if not TESTMODE:
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@ -622,6 +564,76 @@ class RF:
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self.calculate_snr(freedv)
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return nin
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def init_codec2_mode(self, mode, adv):
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"""
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Init codec2 and return some important parameters
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Args:
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self:
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mode:
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adv:
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Returns:
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c2instance, bytes_per_frame, bytes_out, audio_buffer, nin
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"""
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if adv:
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# FSK Long-distance Parity Code 1 - data frames
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c2instance = ctypes.cast(
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codec2.api.freedv_open_advanced(
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codec2.api.FREEDV_MODE_FSK_LDPC,
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ctypes.byref(adv),
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),
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ctypes.c_void_p,
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)
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else:
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# create codec2 instance
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c2instance = ctypes.cast(
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codec2.api.freedv_open(mode), ctypes.c_void_p
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)
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# set tuning range
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self.c_lib.freedv_set_tuning_range(
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c2instance,
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ctypes.c_float(static.TUNING_RANGE_FMIN),
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ctypes.c_float(static.TUNING_RANGE_FMAX),
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)
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# get bytes per frame
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bytes_per_frame = int(
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codec2.api.freedv_get_bits_per_modem_frame(c2instance) / 8
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)
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# create byte out buffer
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bytes_out = ctypes.create_string_buffer(bytes_per_frame)
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# set initial frames per burst
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codec2.api.freedv_set_frames_per_burst(c2instance, 1)
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# init audio buffer
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audio_buffer = codec2.audio_buffer(2 * self.AUDIO_FRAMES_PER_BUFFER_RX)
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# get initial nin
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nin = codec2.api.freedv_nin(c2instance)
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# Additional Datac0-specific information - these are not referenced anywhere else.
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# self.datac0_payload_per_frame = self.datac0_bytes_per_frame - 2
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# self.datac0_n_nom_modem_samples = self.c_lib.freedv_get_n_nom_modem_samples(
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# self.datac0_freedv
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# )
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# self.datac0_n_tx_modem_samples = self.c_lib.freedv_get_n_tx_modem_samples(
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# self.datac0_freedv
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# )
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# self.datac0_n_tx_preamble_modem_samples = (
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# self.c_lib.freedv_get_n_tx_preamble_modem_samples(self.datac0_freedv)
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# )
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# self.datac0_n_tx_postamble_modem_samples = (
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# self.c_lib.freedv_get_n_tx_postamble_modem_samples(self.datac0_freedv)
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# )
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# return values
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return c2instance, bytes_per_frame, bytes_out, audio_buffer, nin
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def audio_datac0(self) -> None:
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"""Receive data encoded with datac0"""
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self.datac0_nin = self.demodulate_audio(
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