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/*
* Copyright 2023 jacqueline <me@jacqueline.id.au>
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#include "i2s_audio_output.hpp"
#include <algorithm>
#include <cstddef>
#include <memory>
#include <variant>
#include "esp_err.h"
#include "freertos/portmacro.h"
#include "audio_element.hpp"
#include "dac.hpp"
#include "freertos/projdefs.h"
#include "gpio_expander.hpp"
#include "result.hpp"
#include "stream_info.hpp"
static const char* kTag = "I2SOUT";
namespace audio {
I2SAudioOutput::I2SAudioOutput(drivers::GpioExpander* expander,
std::weak_ptr<drivers::AudioDac> dac)
: expander_(expander), dac_(dac.lock()), current_config_() {
dac_->WriteVolume(127); // for testing
dac_->SetSource(buffer());
}
I2SAudioOutput::~I2SAudioOutput() {
dac_->SetSource(nullptr);
}
auto I2SAudioOutput::Configure(const StreamInfo::Format& format) -> bool {
if (!std::holds_alternative<StreamInfo::Pcm>(format)) {
ESP_LOGI(kTag, "ignoring non-pcm stream (%d)", format.index());
return false;
}
StreamInfo::Pcm pcm = std::get<StreamInfo::Pcm>(format);
if (current_config_ && pcm == *current_config_) {
ESP_LOGI(kTag, "ignoring unchanged format");
return true;
}
ESP_LOGI(kTag, "incoming audio stream: %u bpp @ %lu Hz", pcm.bits_per_sample,
pcm.sample_rate);
drivers::AudioDac::BitsPerSample bps;
switch (pcm.bits_per_sample) {
case 16:
bps = drivers::AudioDac::BPS_16;
break;
case 24:
bps = drivers::AudioDac::BPS_24;
break;
case 32:
bps = drivers::AudioDac::BPS_32;
break;
default:
ESP_LOGE(kTag, "dropping stream with unknown bps");
return false;
}
drivers::AudioDac::SampleRate sample_rate;
switch (pcm.sample_rate) {
case 44100:
sample_rate = drivers::AudioDac::SAMPLE_RATE_44_1;
break;
case 48000:
sample_rate = drivers::AudioDac::SAMPLE_RATE_48;
break;
default:
ESP_LOGE(kTag, "dropping stream with unknown rate");
return false;
}
// TODO(jacqueline): probs do something with the channel hey
dac_->Reconfigure(bps, sample_rate);
current_config_ = pcm;
return true;
}
auto I2SAudioOutput::Send(const cpp::span<std::byte>& data) -> void {
dac_->WriteData(data);
}
auto I2SAudioOutput::Log() -> void {
dac_->LogStatus();
}
auto I2SAudioOutput::SetVolume(uint8_t volume) -> void {
dac_->WriteVolume(volume);
}
} // namespace audio
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