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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>
53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/*---------------------------------------------------------------------------*\
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FILE........: codec2_fm.h
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AUTHOR......: David Rowe
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DATE CREATED: February 2015
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Functions that implement analog FM, see also octave/fm.m.
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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_FM__
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#define __CODEC2_FM__
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#include "comp.h"
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struct FM {
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float Fs; /* setme: sample rate */
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float fm_max; /* setme: maximum modulation frequency */
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float fd; /* setme: maximum deviation */
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float fc; /* setme: carrier frequency */
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COMP *rx_bb;
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COMP rx_bb_filt_prev;
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float *rx_dem_mem;
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float tx_phase;
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int nsam;
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COMP lo_phase;
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};
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struct FM *fm_create(int nsam);
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void fm_destroy(struct FM *fm_states);
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void fm_demod(struct FM *fm, float rx_out[], float rx[]);
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void fm_mod(struct FM *fm, float tx_in[], float tx_out[]);
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void fm_mod_comp(struct FM *fm_states, float tx_in[], COMP tx_out[]);
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#endif
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