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/*
* Copyright 2023 jacqueline <me@jacqueline.id.au>
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#pragma once
#include <cstdint>
#include <memory>
#include "audio/audio_events.hpp"
#include "audio/audio_sink.hpp"
#include "audio/audio_source.hpp"
#include "audio/processor.hpp"
#include "codec.hpp"
#include "database/track.hpp"
#include "sample.hpp"
#include "types.hpp"
namespace audio {
/*
* Handle to a persistent task that takes encoded bytes from arbitrary sources,
* decodes them into sample::Sample (normalised to 16 bit signed PCM), and then
* streams them onward to the sample processor.
*/
class Decoder {
public:
static auto Start(std::shared_ptr<SampleProcessor>) -> Decoder*;
auto open(std::shared_ptr<TaggedStream>) -> void;
Decoder(const Decoder&) = delete;
Decoder& operator=(const Decoder&) = delete;
private:
Decoder(std::shared_ptr<SampleProcessor>);
auto Main() -> void;
auto prepareDecode(std::shared_ptr<TaggedStream>) -> void;
auto continueDecode() -> bool;
auto finishDecode(bool cancel) -> void;
std::shared_ptr<SampleProcessor> processor_;
// Struct used with the next_stream_ queue.
struct NextStream {
std::shared_ptr<TaggedStream> stream;
};
QueueHandle_t next_stream_;
std::shared_ptr<codecs::IStream> stream_;
std::unique_ptr<codecs::ICodec> codec_;
std::shared_ptr<TrackInfo> track_;
std::span<sample::Sample> codec_buffer_;
std::span<sample::Sample> leftover_samples_;
};
} // namespace audio
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