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58 lines
1.4 KiB
58 lines
1.4 KiB
2 years ago
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#pragma once
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#include <memory>
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#include "freertos/FreeRTOS.h"
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#include "freertos/queue.h"
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#include "span.hpp"
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#include "stream_info.hpp"
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namespace audio {
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struct StreamEvent {
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static auto CreateStreamInfo(QueueHandle_t source,
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std::unique_ptr<StreamInfo> payload)
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-> std::unique_ptr<StreamEvent>;
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static auto CreateChunkData(QueueHandle_t source, std::size_t chunk_size)
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-> std::unique_ptr<StreamEvent>;
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static auto CreateChunkNotification(QueueHandle_t source)
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-> std::unique_ptr<StreamEvent>;
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StreamEvent();
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~StreamEvent();
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StreamEvent(StreamEvent&&);
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QueueHandle_t source;
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enum {
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UNINITIALISED,
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STREAM_INFO,
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CHUNK_DATA,
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CHUNK_NOTIFICATION,
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} tag;
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union {
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std::unique_ptr<StreamInfo> stream_info;
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// Scott Meyers says:
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// `About the only situation I can conceive of when a std::unique_ptr<T[]>
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// would make sense would be when you’re using a C-like API that returns a
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// raw pointer to a heap array that you assume ownership of.`
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// :-)
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struct {
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std::unique_ptr<std::byte*> raw_bytes;
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cpp::span<std::byte> bytes;
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} chunk_data;
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// FIXME: It would be nice to also support a pointer to himem data here, to
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// save a little ordinary heap space.
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};
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StreamEvent(const StreamEvent&) = delete;
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StreamEvent& operator=(const StreamEvent&) = delete;
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};
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} // namespace audio
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