diff options
Diffstat (limited to 'src/audio/i2s_audio_output.cpp')
| -rw-r--r-- | src/audio/i2s_audio_output.cpp | 232 |
1 files changed, 0 insertions, 232 deletions
diff --git a/src/audio/i2s_audio_output.cpp b/src/audio/i2s_audio_output.cpp deleted file mode 100644 index bf1c3e5e..00000000 --- a/src/audio/i2s_audio_output.cpp +++ /dev/null @@ -1,232 +0,0 @@ -/* - * Copyright 2023 jacqueline <me@jacqueline.id.au> - * - * SPDX-License-Identifier: GPL-3.0-only - */ - -#include "i2s_audio_output.hpp" -#include <stdint.h> - -#include <algorithm> -#include <cstddef> -#include <cstdint> -#include <memory> -#include <variant> - -#include "esp_err.h" -#include "esp_heap_caps.h" -#include "freertos/portmacro.h" -#include "freertos/projdefs.h" - -#include "audio_sink.hpp" -#include "gpios.hpp" -#include "i2c.hpp" -#include "i2s_dac.hpp" -#include "result.hpp" -#include "wm8523.hpp" - -[[maybe_unused]] static const char* kTag = "I2SOUT"; - -namespace audio { - -// Consumer line level = 0.316 VRMS = -10db = 61 -// Professional line level = 1.228 VRMS = +4dB = 111 -// Cliipping level = 2.44 VRMS = 133? -// all into 650 ohms - -static constexpr uint16_t kMaxVolume = 0x1ff; -static constexpr uint16_t kMinVolume = 0b0; -static constexpr uint16_t kMaxVolumeBeforeClipping = 0x185; -static constexpr uint16_t kLineLevelVolume = 0x13d; -static constexpr uint16_t kDefaultVolume = 0x100; - -static constexpr size_t kDrainBufferSize = 8 * 1024; - -I2SAudioOutput::I2SAudioOutput(StreamBufferHandle_t s, - drivers::IGpios& expander) - : IAudioOutput(s), - expander_(expander), - dac_(), - current_mode_(Modes::kOff), - current_config_(), - left_difference_(0), - current_volume_(kDefaultVolume), - max_volume_(0) {} - -I2SAudioOutput::~I2SAudioOutput() { - dac_->Stop(); - dac_->SetSource(nullptr); -} - -auto I2SAudioOutput::changeMode(Modes mode) -> void { - if (mode == current_mode_) { - return; - } - if (mode == Modes::kOff) { - if (dac_) { - dac_->Stop(); - dac_.reset(); - } - return; - } - if (current_mode_ == Modes::kOff) { - if (!dac_) { - auto instance = drivers::I2SDac::create(expander_); - if (!instance) { - return; - } - dac_.reset(*instance); - } - SetVolume(GetVolume()); - dac_->SetSource(stream()); - dac_->Start(); - } - current_mode_ = mode; - dac_->SetPaused(mode == Modes::kOnPaused); -} - -auto I2SAudioOutput::SetVolumeImbalance(int_fast8_t balance) -> void { - left_difference_ = balance; - SetVolume(GetVolume()); -} - -auto I2SAudioOutput::SetMaxVolume(uint16_t max) -> void { - max_volume_ = std::clamp(max, drivers::wm8523::kAbsoluteMinVolume, - drivers::wm8523::kAbsoluteMaxVolume); - SetVolume(GetVolume()); -} - -auto I2SAudioOutput::SetVolume(uint16_t vol) -> void { - current_volume_ = std::clamp(vol, kMinVolume, max_volume_); - - int32_t left_unclamped = current_volume_ + left_difference_; - uint16_t left = std::clamp<int32_t>(left_unclamped, kMinVolume, max_volume_); - - using drivers::wm8523::Register; - drivers::wm8523::WriteRegister(Register::kDacGainLeft, left); - drivers::wm8523::WriteRegister(Register::kDacGainRight, - current_volume_ | 0x200); -} - -auto I2SAudioOutput::GetVolume() -> uint16_t { - return current_volume_; -} - -auto I2SAudioOutput::GetVolumePct() -> uint_fast8_t { - return (current_volume_ - kMinVolume) * 100 / (max_volume_ - kMinVolume); -} - -auto I2SAudioOutput::SetVolumePct(uint_fast8_t val) -> bool { - if (val > 100) { - return false; - } - uint16_t vol = (val * (max_volume_ - kMinVolume))/100 + kMinVolume; - SetVolume(vol); - return true; -} - -auto I2SAudioOutput::GetVolumeDb() -> int_fast16_t { - // Add two before dividing in order to round correctly. - return (static_cast<int>(current_volume_) - - static_cast<int>(drivers::wm8523::kLineLevelReferenceVolume) + 2) / - 4; -} - -auto I2SAudioOutput::SetVolumeDb(int_fast16_t val) -> bool { - SetVolume(val * 4 + static_cast<int>(drivers::wm8523::kLineLevelReferenceVolume) - 2); - return true; -} - -auto I2SAudioOutput::AdjustVolumeUp() -> bool { - if (GetVolume() >= max_volume_) { - return false; - } - SetVolume(GetVolume() + 1); - return true; -} - -auto I2SAudioOutput::AdjustVolumeDown() -> bool { - if (GetVolume() == kMinVolume) { - return false; - } - if (GetVolume() <= kMinVolume + 1) { - SetVolume(0); - } else { - SetVolume(GetVolume() - 1); - } - return true; -} - -auto I2SAudioOutput::PrepareFormat(const Format& orig) -> Format { - return Format{ - .sample_rate = std::clamp<uint32_t>(orig.sample_rate, 8000, 96000), - .num_channels = std::min<uint8_t>(orig.num_channels, 2), - .bits_per_sample = std::clamp<uint8_t>(orig.bits_per_sample, 16, 32), - }; -} - -auto I2SAudioOutput::Configure(const Format& fmt) -> void { - if (current_config_ && fmt == *current_config_) { - ESP_LOGI(kTag, "ignoring unchanged format"); - return; - } - - drivers::I2SDac::Channels ch; - switch (fmt.num_channels) { - case 1: - ch = drivers::I2SDac::CHANNELS_MONO; - break; - case 2: - ch = drivers::I2SDac::CHANNELS_STEREO; - break; - default: - ESP_LOGE(kTag, "dropping stream with out of bounds channels"); - return; - } - - drivers::I2SDac::BitsPerSample bps; - switch (fmt.bits_per_sample) { - case 16: - bps = drivers::I2SDac::BPS_16; - break; - case 24: - bps = drivers::I2SDac::BPS_24; - break; - case 32: - bps = drivers::I2SDac::BPS_32; - break; - default: - ESP_LOGE(kTag, "dropping stream with unknown bps"); - return; - } - - drivers::I2SDac::SampleRate sample_rate; - switch (fmt.sample_rate) { - case 8000: - sample_rate = drivers::I2SDac::SAMPLE_RATE_8; - break; - case 32000: - sample_rate = drivers::I2SDac::SAMPLE_RATE_32; - break; - case 44100: - sample_rate = drivers::I2SDac::SAMPLE_RATE_44_1; - break; - case 48000: - sample_rate = drivers::I2SDac::SAMPLE_RATE_48; - break; - case 88200: - sample_rate = drivers::I2SDac::SAMPLE_RATE_88_2; - break; - case 96000: - sample_rate = drivers::I2SDac::SAMPLE_RATE_96; - break; - default: - ESP_LOGE(kTag, "dropping stream with unknown rate"); - return; - } - - dac_->Reconfigure(ch, bps, sample_rate); - current_config_ = fmt; -} - -} // namespace audio |