midi_capture_materializer.hpp

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#pragma once
 
#include <pulp/playback/capture_engine.hpp>
#include <pulp/runtime/result.hpp>
#include <pulp/timebase/compiled_tempo_map.hpp>
#include <pulp/timeline/model.hpp>
 
#include <cstdint>
#include <span>
#include <vector>
 
namespace pulp::playback {
 
struct MidiCaptureMaterializationConfig {
    const timebase::CompiledTempoMap* tempo_map = nullptr;
    // The frame domain of CapturedMidiEvent::take_frame. Materialization
    // rejects a rate that differs from the sample-rate-specific tempo map.
    timebase::RationalRate capture_sample_rate{0, 1};
    timebase::SamplePosition placement_start;
    std::uint64_t frame_count = 0;
    timebase::TickDuration quantize_grid;
    timebase::TickDuration minimum_note_duration{1};
    std::uint64_t next_item_id = 1;
};
 
struct MaterializedMidiCapture {
    timebase::TickPosition clip_start;
    timeline::MidiContent notes;
    std::vector<CapturedMidiEvent> mpe_expression;
    std::uint64_t next_item_id = 1;
};
 
enum class MidiCaptureMaterializationError : std::uint8_t {
    InvalidConfig,
    IdentityExhausted,
    InvalidNotes,
    SampleRateMismatch,
};
 
runtime::Result<MaterializedMidiCapture, MidiCaptureMaterializationError>
materialize_midi_capture(std::span<const CapturedMidiEvent> events,
                         MidiCaptureMaterializationConfig config);
 
} // namespace pulp::playback