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/*
* Copyright 2023 jacqueline <me@jacqueline.id.au>
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#include "audio/sine_source.hpp"
#include <cmath>
#include <cstddef>
#include <cstdint>
#include <limits>
#include <memory>
#include <numbers>
#include "esp_log.h"
#include "audio/audio_source.hpp"
#include "codec.hpp"
#include "drivers/spi.hpp"
#include "sample.hpp"
#include "system_fsm/system_events.hpp"
#include "types.hpp"
namespace audio {
[[maybe_unused]] static constexpr char kTag[] = "sine_src";
SineSource::SineSource(uint32_t freq)
: IStream(codecs::StreamType::kNative),
step_(0),
increment_((2.0 * std::numbers::pi) / (48000.0 / freq)) {}
auto SineSource::Read(std::span<std::byte> dest_bytes) -> ssize_t {
std::span<sample::Sample> dest{
reinterpret_cast<sample::Sample*>(dest_bytes.data()),
dest_bytes.size_bytes() / sizeof(sample::Sample)};
for (size_t i = 0; i < dest.size(); i++) {
dest[i] = std::numeric_limits<sample::Sample>::max() *
std::sin(step_ += increment_);
}
return dest.size_bytes();
}
auto SineSource::CanSeek() -> bool {
return false;
}
auto SineSource::SeekTo(int64_t destination, SeekFrom from) -> void {}
auto SineSource::CurrentPosition() -> int64_t {
return 0;
}
auto SineSource::Size() -> std::optional<int64_t> {
return {};
}
} // namespace audio
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