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include/vamp_zero/performance.hpp

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+#pragma once
+#include <expected>
+#include <filesystem>
+#include <string_view>
+#include <boost/json.hpp>
+#include <sonus.hpp>
+#include <vamp_zero/types.hpp>
+
+
+namespace vamp_zero {
+
+auto parse_beat(boost::json::value const &value) -> std::expected<vamp_zero::beat_position, modulus::error>;
+auto frame_at(vamp_zero::beat_position beat, std::uint32_t bpm) -> std::uint64_t;
+auto available_tempos(vamp_zero::app_state const &state) -> std::vector<std::uint32_t>;
+auto parse_audio_assets(std::string_view json) -> std::expected<std::vector<vamp_zero::audio_asset>, modulus::error>;
+auto validate_audio_assets(vamp_zero::catalog const &catalog, std::filesystem::path const &assets) -> std::expected<void, modulus::error>;
+auto prepare_performance(vamp_zero::score_document const &score, vamp_zero::app_state const &state, std::filesystem::path const &assets, std::float32_t click_volume) -> std::expected<sonus::prepared_transport, modulus::error>;
+
+struct performance_position {
+  std::size_t page{};
+  std::string phase{};
+};
+
+auto performance_at(vamp_zero::score_document const &score, std::uint64_t frames, std::uint32_t bpm) -> vamp_zero::performance_position;
+auto automatic(vamp_zero::audio_state const &audio) -> bool;
+
+}