bsncubed
bae6a8a2f9
- aes67_tx: TX task woken by an esp_timer every packet time; sends every packet whose last sample is in the past (PTP time), RTP ts = (sample index from PTP + clk_offset) mod 2^32, packets aligned to multiples of the packet size. Sends only while PTP is locked; resyncs on lock, clock step or > 20 ms lag. L24/L16 big-endian, TTL/DSCP/ multicast IF from config; a config save restarts TX. - Built-in 1 kHz tone at -18 dBFS, phase from the PTP sample index; aes67_tx_set_source() pull callback for later sources (underruns counted, padded with silence). status: tx_packets, underruns. - Verified with a receiver script on the PC: 1 ms L24 stereo 1000/s, 0 gaps, ts step 48, tone -18.00 dBFS within 1.2 LSB of the ideal PTP-phased sine; also L16 mono 0.333 ms, 0.125 ms (8000/s) and 4 ms. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
20 lines
831 B
C
20 lines
831 B
C
// aes67_tx: RTP sender task, PTP-paced, pull callback; optional mono sum.
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// Core component: must not depend on main/ (project code).
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#pragma once
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#include <stddef.h>
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#include <stdint.h>
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#include "esp_err.h"
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// Audio source: fill buf with frames x channels interleaved samples (full scale = INT32_MAX).
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// Return the number of frames delivered; fewer than asked counts as an underrun (padded with silence).
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typedef size_t (*aes67_tx_read_cb_t)(int32_t *buf, size_t frames);
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// Registers the "aes67" config group and the TX status fields.
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esp_err_t aes67_tx_init(void);
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// Start the sender task. Sends while PTP is locked and aes67.enabled is set.
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esp_err_t aes67_tx_start(void);
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// Set the audio source. NULL = built-in 1 kHz test tone at -18 dBFS, phase-locked to PTP time.
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void aes67_tx_set_source(aes67_tx_read_cb_t read);
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