CREATE TABLE IF NOT EXISTS audio_files (
  id integer PRIMARY KEY,
  file_path text NOT NULL UNIQUE,
  length_milliseconds int NOT NULL,
  file_type_id int NOT NULL,
  recording_id int NOT NULL,
  sample_rate int NOT NULL DEFAULT 0,
  bit_depth int NOT NULL DEFAULT 0,
  channels int NOT NULL DEFAULT 0,
  bitrate int NOT NULL DEFAULT 0,
  file_size int NOT NULL DEFAULT 0,
  basename text NOT NULL DEFAULT '',
  library_id int NOT NULL DEFAULT 0,
  FOREIGN KEY(file_type_id) REFERENCES file_types(id),
  FOREIGN KEY(recording_id) REFERENCES recordings(id),
  FOREIGN KEY(library_id) REFERENCES libraries(id)
);

CREATE INDEX IF NOT EXISTS idx_audio_files_recording_id
    ON audio_files(recording_id);

-- idx_audio_files_library_id is created by migration 6 (not here) because
-- on existing databases this schema file is a no-op (CREATE TABLE IF NOT EXISTS)
-- and the library_id column doesn't exist until the migration adds it.