Add internet radio streaming with runtime API, modernize web UI, remove auto-tune/beep at boot
Streaming (main feature this session): - New WebRadioConfig/WebRadioJson core types, ISecureStore-backed persistence - New webradio::WebRadioService (thread-safe live config) + GET/POST /api/streaming - web_radio_stream task now runtime-toggleable (no reboot), no hardcoded URL - Content-Type diagnostic: warns clearly when a URL is a webpage, not an audio stream Boot cleanup: - Removed boot-time auto FM/DAB tune, auto-beep, and the (now-concluded) Si4684 crystal IBIAS/CTUN empirical sweep from main.cpp — tuning/beep are on-demand via the existing REST API only Web UI: - Modernized styling (cards, gradients, toggle switches, light/dark theme) - New Stream tab wired to /api/streaming Fixes found via real idf.py build (not just clangd): - Restored wrongly-removed si4684/Si4684Tuner.hpp include in main.cpp - Fixed MP3Decode() argument types in web_radio_stream.cpp (unsigned char**/int*) Quality-gate fixes: - Host-test stub headers (esp_log.h, freertos/*) so TunerService.cpp's scanForStation logging/pacing compiles for station_service_test / integration_service_test instead of running stale binaries - Added WifiScanner and WebRadioService manual sections; filled in missing Doxygen docs on BluetoothService, i2s_sdata_probe, test_firmware, Bt1035At - Ignore clangd's .cache/ index directory Also includes prior uncommitted work carried in the tree: Wi-Fi/Bluetooth device scan REST API and UI (WifiScanner, BT scan), SigmaStudio TCP bridge, and the current ADAU1701 SigmaStudio DSP program export. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
Claude Sonnet 5
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/**
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* @file i2s_sdata_probe.cpp
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* @brief One-shot I2S slave RX capture to check for real audio on SDATA.
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*
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* DigiRadio firmware — https://github.com/manvalan/DigiRadio
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*
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* Copyright 2026 Michele Bigi
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "i2s_sdata_probe.hpp"
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#include "board_pins.hpp"
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#include "driver/i2s_std.h"
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#include "esp_log.h"
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#include "esp_timer.h"
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#include "freertos/FreeRTOS.h"
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#include <cstddef>
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#include <cstdint>
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namespace i2s_sdata_probe {
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namespace {
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constexpr char kTag[] = "i2s_sdata_probe";
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constexpr int kSampleRateHz = 48000;
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constexpr std::size_t kReadBufSamples = 512U;
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// Top 24 bits carry ADAU audio data in a 32-bit slot (see former
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// esp32_i2s_tone.cpp); a few % of full scale is already audible content.
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constexpr std::int32_t kAudibleThreshold = 0x7FFFFFFF / 20; // ~5% FS
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struct CaptureStats {
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std::int32_t peak = 0;
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std::uint32_t nonZeroSamples = 0U;
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std::uint32_t totalSamples = 0U;
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};
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i2s_chan_handle_t openRxChannel()
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{
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i2s_chan_config_t chanCfg =
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I2S_CHANNEL_DEFAULT_CONFIG(I2S_NUM_0, I2S_ROLE_SLAVE);
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i2s_chan_handle_t rxHandle = nullptr;
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if (i2s_new_channel(&chanCfg, nullptr, &rxHandle) != ESP_OK) {
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ESP_LOGW(kTag, "i2s_new_channel failed");
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return nullptr;
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}
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i2s_std_config_t stdCfg = {
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.clk_cfg = I2S_STD_CLK_DEFAULT_CONFIG(kSampleRateHz),
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// 32-bit slots match ADAU1701 SerialOutRegister1=0x800 (64 BCLKs/frame),
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// same format the removed esp32_i2s_tone.cpp used on the TX side.
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.slot_cfg = I2S_STD_PHILIPS_SLOT_DEFAULT_CONFIG(
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I2S_DATA_BIT_WIDTH_32BIT, I2S_SLOT_MODE_STEREO),
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.gpio_cfg = {
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.mclk = I2S_GPIO_UNUSED,
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.bclk = static_cast<gpio_num_t>(board::pins::I2sBclk),
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.ws = static_cast<gpio_num_t>(board::pins::I2sLrclk),
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.dout = I2S_GPIO_UNUSED,
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.din = static_cast<gpio_num_t>(board::pins::I2sDataOut),
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.invert_flags = {
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.mclk_inv = false,
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.bclk_inv = false,
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.ws_inv = false,
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},
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},
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};
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// Slave: BCLK/LRCLK driven by ADAU1701 master; no clock overrides needed.
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if (i2s_channel_init_std_mode(rxHandle, &stdCfg) != ESP_OK
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|| i2s_channel_enable(rxHandle) != ESP_OK) {
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ESP_LOGW(kTag, "I2S RX channel init/enable failed");
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i2s_del_channel(rxHandle);
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return nullptr;
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}
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ESP_LOGI(kTag, "I2S slave RX started (BCLK=%d WS=%d DIN=%d)",
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board::pins::I2sBclk, board::pins::I2sLrclk,
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board::pins::I2sDataOut);
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return rxHandle;
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}
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void accumulateSamples(const std::int32_t* buf, std::size_t count,
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CaptureStats& stats)
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{
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for (std::size_t i = 0U; i < count; ++i) {
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const std::int32_t value = buf[i];
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const std::int32_t absValue = value < 0 ? -value : value;
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if (absValue > stats.peak) {
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stats.peak = absValue;
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}
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if (value != 0) {
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++stats.nonZeroSamples;
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}
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}
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stats.totalSamples += static_cast<std::uint32_t>(count);
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}
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CaptureStats sampleWindow(i2s_chan_handle_t rxHandle, int windowMs)
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{
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CaptureStats stats;
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std::int32_t buf[kReadBufSamples];
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const std::int64_t startUs = esp_timer_get_time();
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const std::int64_t targetUs = static_cast<std::int64_t>(windowMs) * 1000;
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while (esp_timer_get_time() - startUs < targetUs) {
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std::size_t bytesRead = 0U;
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const esp_err_t err = i2s_channel_read(rxHandle, buf, sizeof(buf),
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&bytesRead, pdMS_TO_TICKS(50));
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if (err != ESP_OK || bytesRead == 0U) {
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continue;
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}
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accumulateSamples(buf, bytesRead / sizeof(std::int32_t), stats);
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}
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return stats;
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}
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const char* verdictFor(const CaptureStats& stats)
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{
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if (stats.totalSamples == 0U || stats.nonZeroSamples == 0U) {
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return "SILENT — dead/zero line on GPIO16";
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}
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return stats.peak >= kAudibleThreshold
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? "real audio-level content"
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: "activity present but very low amplitude";
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}
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} // namespace
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void captureAndLog(int windowMs)
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{
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i2s_chan_handle_t rxHandle = openRxChannel();
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if (rxHandle == nullptr) {
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return;
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}
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const CaptureStats stats = sampleWindow(rxHandle, windowMs);
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i2s_channel_disable(rxHandle);
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i2s_del_channel(rxHandle);
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ESP_LOGI(kTag, "SDATA capture: %u samples, peak=%ld, nonzero=%u/%u -> %s",
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static_cast<unsigned>(stats.totalSamples),
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static_cast<long>(stats.peak),
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static_cast<unsigned>(stats.nonZeroSamples),
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static_cast<unsigned>(stats.totalSamples), verdictFor(stats));
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}
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} // namespace i2s_sdata_probe
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