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124 lines
3.0 KiB
124 lines
3.0 KiB
/*
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* Copyright 2023 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 "bt_audio_output.hpp"
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#include <algorithm>
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#include <cmath>
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#include <cstddef>
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#include <cstdint>
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#include <memory>
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#include <variant>
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#include "esp_err.h"
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#include "esp_heap_caps.h"
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#include "freertos/portmacro.h"
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#include "freertos/projdefs.h"
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#include "gpios.hpp"
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#include "i2c.hpp"
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#include "i2s_dac.hpp"
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#include "result.hpp"
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#include "tasks.hpp"
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#include "wm8523.hpp"
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[[maybe_unused]] static const char* kTag = "BTOUT";
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namespace audio {
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static constexpr uint16_t kVolumeRange = 60;
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BluetoothAudioOutput::BluetoothAudioOutput(StreamBufferHandle_t s,
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drivers::Bluetooth& bt,
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tasks::WorkerPool& p)
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: IAudioOutput(s), bluetooth_(bt), bg_worker_(p), volume_() {}
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BluetoothAudioOutput::~BluetoothAudioOutput() {}
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auto BluetoothAudioOutput::changeMode(Modes mode) -> void {
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if (mode == Modes::kOnPlaying) {
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bluetooth_.SetSource(stream());
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} else {
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bluetooth_.SetSource(nullptr);
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}
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}
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auto BluetoothAudioOutput::SetVolumeImbalance(int_fast8_t balance) -> void {
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// FIXME: Support two separate scaling factors in the bluetooth driver.
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}
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auto BluetoothAudioOutput::SetVolume(uint16_t v) -> void {
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volume_ = std::clamp<uint16_t>(v, 0, 100);
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bg_worker_.Dispatch<void>([&]() {
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float factor =
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pow(10, static_cast<double>(kVolumeRange) * (volume_ - 100) / 100 / 20);
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bluetooth_.SetVolumeFactor(factor);
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});
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}
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auto BluetoothAudioOutput::GetVolume() -> uint16_t {
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return volume_;
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}
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auto BluetoothAudioOutput::GetVolumePct() -> uint_fast8_t {
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return static_cast<uint_fast8_t>(round(static_cast<int>(volume_)));
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}
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auto BluetoothAudioOutput::SetVolumePct(uint_fast8_t val) -> bool {
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if (val > 100) {
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return false;
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}
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SetVolume(val);
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return true;
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}
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auto BluetoothAudioOutput::GetVolumeDb() -> int_fast16_t {
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double pct = GetVolumePct() / 100.0;
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if (pct <= 0) {
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pct = 0.01;
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}
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int_fast16_t db = log(pct) * 20;
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return db;
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}
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auto BluetoothAudioOutput::SetVolumeDb(int_fast16_t val) -> bool {
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double pct = exp(val / 20.0) * 100;
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return SetVolumePct(pct);
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}
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auto BluetoothAudioOutput::AdjustVolumeUp() -> bool {
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if (volume_ == 100 || !bluetooth_.IsConnected()) {
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return false;
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}
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volume_++;
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SetVolume(volume_);
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return true;
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}
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auto BluetoothAudioOutput::AdjustVolumeDown() -> bool {
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if (volume_ == 0 || !bluetooth_.IsConnected()) {
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return false;
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}
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volume_--;
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SetVolume(volume_);
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return true;
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}
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auto BluetoothAudioOutput::PrepareFormat(const Format& orig) -> Format {
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// ESP-IDF's current Bluetooth implementation currently handles SBC encoding,
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// but requires a fixed input format.
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return Format{
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.sample_rate = 48000,
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.num_channels = 2,
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.bits_per_sample = 16,
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};
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}
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auto BluetoothAudioOutput::Configure(const Format& fmt) -> void {
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// No configuration necessary; the output format is fixed.
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}
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} // namespace audio
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