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/*
* Copyright 2023 jacqueline <me@jacqueline.id.au>
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#include "audio_fsm.hpp"
#include <stdint.h>
#include <future>
#include <memory>
#include <variant>
#include "audio_sink.hpp"
#include "esp_log.h"
#include "freertos/portmacro.h"
#include "freertos/projdefs.h"
#include "audio_converter.hpp"
#include "audio_decoder.hpp"
#include "audio_events.hpp"
#include "bluetooth.hpp"
#include "bt_audio_output.hpp"
#include "event_queue.hpp"
#include "fatfs_audio_input.hpp"
#include "future_fetcher.hpp"
#include "i2s_audio_output.hpp"
#include "i2s_dac.hpp"
#include "idf_additions.h"
#include "nvs.hpp"
#include "sample.hpp"
#include "service_locator.hpp"
#include "system_events.hpp"
#include "track.hpp"
#include "track_queue.hpp"
#include "wm8523.hpp"
namespace audio {
[[maybe_unused]] static const char kTag[] = "audio_fsm";
std::shared_ptr<system_fsm::ServiceLocator> AudioState::sServices;
std::shared_ptr<FatfsAudioInput> AudioState::sFileSource;
std::unique_ptr<Decoder> AudioState::sDecoder;
std::shared_ptr<SampleConverter> AudioState::sSampleConverter;
std::shared_ptr<I2SAudioOutput> AudioState::sI2SOutput;
std::shared_ptr<BluetoothAudioOutput> AudioState::sBtOutput;
std::shared_ptr<IAudioOutput> AudioState::sOutput;
std::optional<database::TrackId> AudioState::sCurrentTrack;
void AudioState::react(const system_fsm::KeyLockChanged& ev) {
if (ev.locking && sServices) {
sServices->nvs().AmpCurrentVolume(sOutput->GetVolume());
}
}
void AudioState::react(const StepUpVolume& ev) {
if (sOutput->AdjustVolumeUp()) {
events::Ui().Dispatch(VolumeChanged{
.percent = sOutput->GetVolumePct(),
.db = sOutput->GetVolumeDb(),
});
}
}
void AudioState::react(const StepDownVolume& ev) {
if (sOutput->AdjustVolumeDown()) {
events::Ui().Dispatch(VolumeChanged{
.percent = sOutput->GetVolumePct(),
.db = sOutput->GetVolumeDb(),
});
}
}
void AudioState::react(const system_fsm::HasPhonesChanged& ev) {
if (ev.has_headphones) {
ESP_LOGI(kTag, "headphones in!");
} else {
ESP_LOGI(kTag, "headphones out!");
}
}
void AudioState::react(const ChangeMaxVolume& ev) {
ESP_LOGI(kTag, "new max volume %i db",
(ev.new_max - drivers::wm8523::kLineLevelReferenceVolume) / 4);
sI2SOutput->SetMaxVolume(ev.new_max);
sServices->nvs().AmpMaxVolume(ev.new_max);
}
void AudioState::react(const OutputModeChanged& ev) {
// TODO: handle SetInUse
ESP_LOGI(kTag, "output mode changed");
auto new_mode = sServices->nvs().OutputMode();
sOutput->SetMode(IAudioOutput::Modes::kOff);
switch (new_mode) {
case drivers::NvsStorage::Output::kBluetooth:
sOutput = sBtOutput;
break;
case drivers::NvsStorage::Output::kHeadphones:
sOutput = sI2SOutput;
break;
}
sOutput->SetMode(IAudioOutput::Modes::kOnPaused);
}
auto AudioState::playTrack(database::TrackId id) -> void {
sCurrentTrack = id;
sServices->bg_worker().Dispatch<void>([=]() {
auto db = sServices->database().lock();
if (!db) {
return;
}
sFileSource->SetPath(db->getTrackPath(id));
});
}
namespace states {
void Uninitialised::react(const system_fsm::BootComplete& ev) {
sServices = ev.services;
constexpr size_t kDrainBufferSize =
drivers::kI2SBufferLengthFrames * sizeof(sample::Sample) * 2 * 8;
ESP_LOGI(kTag, "allocating drain buffer, size %u KiB",
kDrainBufferSize / 1024);
StreamBufferHandle_t stream = xStreamBufferCreateWithCaps(
kDrainBufferSize, sizeof(sample::Sample) * 2, MALLOC_CAP_DMA);
sFileSource.reset(
new FatfsAudioInput(sServices->tag_parser(), sServices->bg_worker()));
sI2SOutput.reset(new I2SAudioOutput(stream, sServices->gpios()));
sBtOutput.reset(new BluetoothAudioOutput(stream, sServices->bluetooth()));
auto& nvs = sServices->nvs();
sI2SOutput->SetMaxVolume(nvs.AmpMaxVolume());
sI2SOutput->SetVolume(nvs.AmpCurrentVolume());
if (sServices->nvs().OutputMode() ==
drivers::NvsStorage::Output::kHeadphones) {
sOutput = sI2SOutput;
} else {
sOutput = sBtOutput;
}
sOutput->SetMode(IAudioOutput::Modes::kOnPaused);
sSampleConverter.reset(new SampleConverter());
sSampleConverter->SetOutput(sOutput);
Decoder::Start(sFileSource, sSampleConverter);
transit<Standby>();
}
void Standby::react(const PlayFile& ev) {
sFileSource->SetPath(ev.filename);
}
void Playback::react(const PlayFile& ev) {
sFileSource->SetPath(ev.filename);
}
void Standby::react(const internal::InputFileOpened& ev) {
transit<Playback>();
}
void Standby::react(const QueueUpdate& ev) {
auto current_track = sServices->track_queue().current();
if (!current_track || (sCurrentTrack && *sCurrentTrack == *current_track)) {
return;
}
playTrack(*current_track);
}
void Standby::react(const TogglePlayPause& ev) {
if (sCurrentTrack) {
transit<Playback>();
}
}
void Playback::entry() {
ESP_LOGI(kTag, "beginning playback");
sOutput->SetMode(IAudioOutput::Modes::kOnPlaying);
events::System().Dispatch(PlaybackStarted{});
events::Ui().Dispatch(PlaybackStarted{});
}
void Playback::exit() {
ESP_LOGI(kTag, "finishing playback");
// TODO(jacqueline): Second case where it's useful to wait for the i2s buffer
// to drain.
vTaskDelay(pdMS_TO_TICKS(10));
sOutput->SetMode(IAudioOutput::Modes::kOnPaused);
// Stash the current volume now, in case it changed during playback, since we
// might be powering off soon.
sServices->nvs().AmpCurrentVolume(sOutput->GetVolume());
events::System().Dispatch(PlaybackFinished{});
events::Ui().Dispatch(PlaybackFinished{});
}
void Playback::react(const system_fsm::HasPhonesChanged& ev) {
if (!ev.has_headphones) {
transit<Standby>();
}
}
void Playback::react(const QueueUpdate& ev) {
if (!ev.current_changed) {
return;
}
auto current_track = sServices->track_queue().current();
if (!current_track) {
sFileSource->SetPath();
sCurrentTrack.reset();
transit<Standby>();
return;
}
playTrack(*current_track);
}
void Playback::react(const TogglePlayPause& ev) {
transit<Standby>();
}
void Playback::react(const PlaybackUpdate& ev) {
ESP_LOGI(kTag, "elapsed: %lu, total: %lu", ev.seconds_elapsed,
ev.track->duration);
}
void Playback::react(const internal::InputFileOpened& ev) {}
void Playback::react(const internal::InputFileClosed& ev) {}
void Playback::react(const internal::InputFileFinished& ev) {
ESP_LOGI(kTag, "finished playing file");
sServices->track_queue().next();
if (!sServices->track_queue().current()) {
transit<Standby>();
}
}
void Playback::react(const internal::AudioPipelineIdle& ev) {
transit<Standby>();
}
} // namespace states
} // namespace audio
FSM_INITIAL_STATE(audio::AudioState, audio::states::Uninitialised)
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