/*
DESCRIPTION
  file.go provides an implementation of the AVDevice interface for media files.

AUTHORS
  Saxon A. Nelson-Milton <saxon@ausocean.org>

LICENSE
  Copyright (C) 2019 the Australian Ocean Lab (AusOcean)

  It is free software: you can redistribute it and/or modify them
  under the terms of the GNU General Public License as published by the
  Free Software Foundation, either version 3 of the License, or (at your
  option) any later version.

  It is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  for more details.

  You should have received a copy of the GNU General Public License
  in gpl.txt.  If not, see http://www.gnu.org/licenses.
*/

package revid

import (
	"fmt"
	"io"
	"os"
)

type AVFile struct {
	f   io.ReadCloser
	cfg Config
}

func NewAVFile() *AVFile                     { return &AVFile{} }
func (m *AVFile) Stop() error                { return m.f.Close() }
func (m *AVFile) Read(p []byte) (int, error) { return m.f.Read(p) }

func (m *AVFile) Set(c Config) error {
	m.cfg = c
	return nil
}

func (m *AVFile) Start() error {
	var err error
	m.f, err = os.Open(m.cfg.InputPath)
	if err != nil {
		return fmt.Errorf("could not open media file: %w", err)
	}
	return nil
}