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torlando-techandClaude Opus 4.7
5a3ee97856
The PlatformIO dep sh123/esp32_codec2_arduino@1.0.7 bundles codec2 v0.9.2. Mac-side pycodec2 v3.0.4 links libcodec2 v1.2.0. Years of codec2 development between those releases. Replace the upstream lib with a local vendor of drowe67/codec2 v1.2.0 under lib/codec2/. Trim the 191-file source tree down to the ~100 files actually needed for codec2 (drop FreeDV, OFDM, COHPSK, FSK, FM-FSK, LDPC, Horus, CLI tools — pyxis only uses codec2_create/destroy/encode/decode + samples_per_frame / bytes_per_frame). Carry over the v0.9 codebook .c files since the codebook contents matched (compared against v1.2's src/codebook/*.txt). Define __EMBEDDED__ so the codebooks land in flash (.const) rather than RAM. Without it the codebooks add ~127KB to BSS and the LVGL task fails to start (RAM was 65% full vs 27% with __EMBEDDED__). Provide trivial codec2_malloc/codec2_free wrappers in codec2_alloc_esp32.c (codec2 v1.2 expects them when __EMBEDDED__ is defined; ESP-IDF's malloc/free already pull from internal RAM). Also explicitly add SD/FS to lib_deps and #include <SD.h> in main.cpp — the previous esp32_codec2 dep transitively pulled SD which let SDArchiveFileSystem.h get away with depending on it implicitly. With chain+ ldf mode and no esp32_codec2 dep, we have to declare the framework lib explicitly. DOES NOT fix the ~30x speech-decode RMS asymmetry between pycodec2 self-tests (~5800) and pyxis decoding the same encoded bytes (~170). Sine waves and 3-formant synthesis pass clean both directions; only real TTS speech triggers it. Probably a separate codec-state divergence (the encoder/decoder are independent codec2 instances in pyxis, both fresh per call) or a wire-format quirk we still need to track down. v1.2 is the right baseline regardless — same bug class as several upstream fixes. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
74 lines
2.9 KiB
C
74 lines
2.9 KiB
C
/*---------------------------------------------------------------------------*\
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FILE........: codec2_cohpsk.h
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AUTHOR......: David Rowe
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DATE CREATED: March 2015
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Functions that implement a coherent PSK FDM modem.
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\*---------------------------------------------------------------------------*/
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/*
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Copyright (C) 2015 David Rowe
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All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License version 2.1, as
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published by the Free Software Foundation. This program is
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distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __CODEC2_COHPSK__
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#define __CODEC2_COHPSK__
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#define COHPSK_BITS_PER_FRAME 56
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#define COHPSK_NC 7 /* number of carriers */
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#define COHPSK_NOM_SAMPLES_PER_FRAME 600
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#define COHPSK_MAX_SAMPLES_PER_FRAME 625
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#define COHPSK_RS 75 /* symbol rate of each carrier */
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#define COHPSK_FS \
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7500 /* note this is a weird value to get an integer \
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oversampling rate */
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#define COHPSK_CLIP 6.5 /* hard clipping for Nc*Nc=14 to reduce PAPR */
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#define COHPSK_SCALE 975 /* suggested scaling for 16 bit shorts */
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#include "comp.h"
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#include "modem_stats.h"
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struct COHPSK;
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extern const int test_bits_coh[];
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struct COHPSK *cohpsk_create(void);
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void cohpsk_destroy(struct COHPSK *coh);
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void cohpsk_mod(struct COHPSK *cohpsk, COMP tx_fdm[], int tx_bits[], int nbits);
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void cohpsk_clip(COMP tx_fdm[], float clip_thresh, int n);
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void cohpsk_demod(struct COHPSK *cohpsk, float rx_bits[], int *sync,
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COMP rx_fdm[], int *nin_frame);
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void cohpsk_get_demod_stats(struct COHPSK *cohpsk, struct MODEM_STATS *stats);
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void cohpsk_set_verbose(struct COHPSK *coh, int verbose);
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void cohpsk_get_test_bits(struct COHPSK *coh, int rx_bits[]);
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void cohpsk_put_test_bits(struct COHPSK *coh, int *state, short error_pattern[],
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int *bit_errors, char rx_bits[], int channel);
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int cohpsk_error_pattern_size(void);
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void cohpsk_set_frame(struct COHPSK *coh, int frame);
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void fdmdv_freq_shift_coh(COMP rx_fdm_fcorr[], COMP rx_fdm[], float foff,
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float Fs, COMP *foff_phase_rect, int nin);
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void cohpsk_set_freq_est_mode(struct COHPSK *coh, int used_simple_mode);
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/* used for accessing upper and lower bits before diversity combination */
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float *cohpsk_get_rx_bits_lower(struct COHPSK *coh);
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float *cohpsk_get_rx_bits_upper(struct COHPSK *coh);
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void cohpsk_set_carrier_ampl(struct COHPSK *coh, int c, float ampl);
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#endif
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