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111 lines
3.0 KiB
111 lines
3.0 KiB
/*
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* Copyright 2024 jacqueline <me@jacqueline.id.au>
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*
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* SPDX-License-Identifier: GPL-3.0-only
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*/
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#include "tts/provider.hpp"
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#include <stdint.h>
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#include <ios>
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#include <optional>
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#include <sstream>
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#include <string>
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#include <variant>
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#include "drivers/storage.hpp"
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#include "esp_log.h"
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#include "komihash.h"
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#include "tts/events.hpp"
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namespace tts {
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[[maybe_unused]] static constexpr char kTag[] = "tts";
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static const char* kTtsPath = "/.tangara-tts/";
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static auto textToFile(const std::string& text) -> std::optional<std::string> {
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uint64_t hash = komihash(text.data(), text.size(), 0);
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std::stringstream stream;
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// Assume the TTS sample is a .wav file; since we only support one low-RAM
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// overhead codec, we can presume the suffix. The suffix is needed, else we
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// fail to open the stream when it fails to autodetect the format when looking
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// up tags.
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stream << kTtsPath << std::hex << hash << ".wav";
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return stream.str();
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}
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Provider::Provider(drivers::NvsStorage& nvs) : nvs_(nvs) {
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tts_enabled_ = nvs_.UITextToSpeech();
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}
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auto Provider::player(std::unique_ptr<Player> p) -> void {
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player_ = std::move(p);
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}
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auto Provider::feed(const Event& e) -> void {
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if (std::holds_alternative<SimpleEvent>(e)) {
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// ESP_LOGI(kTag, "context changed");
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} else if (std::holds_alternative<TtsEnabledChanged>(e)) {
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auto ev = std::get<TtsEnabledChanged>(e);
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tts_enabled_ = ev.tts_enabled;
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} else if (std::holds_alternative<SelectionChanged>(e)) {
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auto ev = std::get<SelectionChanged>(e);
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if (!ev.new_selection) {
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// ESP_LOGI(kTag, "no selection");
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} else {
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// ESP_LOGI(kTag, "new selection: '%s', interactive? %i",
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// ev.new_selection->description.value_or("").c_str(),
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// ev.new_selection->is_interactive);
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auto text = ev.new_selection->description;
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if (!text) {
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ESP_LOGW(kTag, "missing description for element");
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return;
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}
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auto file = textToFile(*text);
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if (!file) {
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return;
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}
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if (player_ && tts_enabled_) {
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player_->playFile(*text, *file);
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}
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}
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}
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}
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bool Provider::SamplesOnSDCard() {
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// Does the /.tangara-tts/ path exist on the SD card?
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FILINFO fi;
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FRESULT status = f_stat(kTtsPath, &fi);
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switch (status) {
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case FR_NO_PATH:
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case FR_NO_FILE:
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case FR_NO_FILESYSTEM:
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// If the SD card isn't mounted, or no matching file, then no samples.
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return false;
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case FR_OK:
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// If /.tangara-tts exists, let's check it out first.
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break;
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default:
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// If things look odd, then assume samples aren't present.
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ESP_LOGW(kTag, "got unexpected %d status from f_stat(\"%s\")", status,
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kTtsPath);
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return false;
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}
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// If /.tangara-tts exists and is a directory, it probably contains samples.
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if (fi.fattrib & AM_DIR)
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return true;
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// Otherwise, for example, if it's a file, assume no samples present.
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ESP_LOGW(kTag, "got unexpected file attributes for %s: %d", kTtsPath,
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fi.fattrib);
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return false;
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}
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} // namespace tts
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