shaka-packager/packager/media/base/muxer_options.h

// Copyright 2014 Google Inc. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd

#ifndef MEDIA_BASE_MUXER_OPTIONS_H_
#define MEDIA_BASE_MUXER_OPTIONS_H_

#include <stdint.h>

#include <string>

namespace shaka {
namespace media {

/// This structure contains the list of configuration options for Muxer.
struct MuxerOptions {
  MuxerOptions();
  ~MuxerOptions();

  /// Segment duration in seconds. If single_segment is specified, this
  /// parameter sets the duration of a subsegment; otherwise, this parameter
  /// sets the duration of a segment. A segment can contain one or many
  /// fragments.
  double segment_duration = 0;

  /// Fragment duration in seconds. Should not be larger than the segment
  /// duration.
  double fragment_duration = 0;

  /// Force segments to begin with stream access points. Segment duration may
  /// not be exactly what specified by segment_duration.
  bool segment_sap_aligned = false;

  /// Force fragments to begin with stream access points. Fragment duration
  /// may not be exactly what specified by segment_duration. Setting to true
  /// implies that segment_sap_aligned is true as well.
  bool fragment_sap_aligned = false;

  /// For ISO BMFF only.
  /// Set the number of subsegments in each SIDX box. If 0, a single SIDX box
  /// is used per segment. If -1, no SIDX box is used. Otherwise, the Muxer
  /// will pack N subsegments in the root SIDX of the segment, with
  /// segment_duration/N/fragment_duration fragments per subsegment.
  int num_subsegments_per_sidx = 0;

  /// For ISO BMFF only.
  /// Set the flag use_decoding_timestamp_in_timeline, which if set to true, use
  /// decoding timestamp instead of presentation timestamp in media timeline,
  /// which is needed to workaround a Chromium bug that decoding timestamp is
  /// used in buffered range, https://crbug.com/398130.
  bool mp4_use_decoding_timestamp_in_timeline = false;

  /// Output file name. If segment_template is not specified, the Muxer
  /// generates this single output file with all segments concatenated;
  /// Otherwise, it specifies the init segment name.
  std::string output_file_name;

  /// Specify output segment name pattern for generated segments. It can
  /// furthermore be configured by using a subset of the SegmentTemplate
  /// identifiers: $RepresentationID$, $Number$, $Bandwidth$ and $Time.
  /// Optional.
  std::string segment_template;

  /// Specify temporary directory for intermediate files.
  std::string temp_dir;

  /// User-specified bit rate for the media stream. If zero, the muxer will
  /// attempt to estimate.
  uint32_t bandwidth = 0;

  // Enable/disable subsample encryption for WebM containers.
  bool webm_subsample_encryption = true;
};

}  // namespace media
}  // namespace shaka

#endif  // MEDIA_BASE_MUXER_OPTIONS_H_