text_stream_info.h

// Copyright 2015 Google LLC. 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 PACKAGER_MEDIA_BASE_TEXT_STREAM_INFO_H_
#define PACKAGER_MEDIA_BASE_TEXT_STREAM_INFO_H_
 
#include <cstdint>
#include <map>
#include <memory>
#include <string>
#include <utility>
 
#include <packager/media/base/stream_info.h>
#include <packager/media/base/text_sample.h>
 
namespace shaka {
namespace media {
 
struct TextRegion {
  TextNumber width{100, TextUnitType::kPercent};
  TextNumber height{100, TextUnitType::kPercent};
 
  TextNumber window_anchor_x{0, TextUnitType::kPercent};
  TextNumber window_anchor_y{0, TextUnitType::kPercent};
  TextNumber region_anchor_x{0, TextUnitType::kPercent};
  TextNumber region_anchor_y{0, TextUnitType::kPercent};
 
  bool scroll = false;
};
 
struct TextSubStreamInfo {
  std::string language;
};
 
class TextStreamInfo : public StreamInfo {
 public:
  TextStreamInfo(int track_id,
                 int32_t time_scale,
                 int64_t duration,
                 Codec codec,
                 const std::string& codec_string,
                 const std::string& codec_config,
                 uint16_t width,
                 uint16_t height,
                 const std::string& language);
 
  ~TextStreamInfo() override;
 
  bool IsValidConfig() const override;
 
  std::string ToString() const override;
  std::unique_ptr<StreamInfo> Clone() const override;
 
  uint16_t width() const { return width_; }
  uint16_t height() const { return height_; }
  const std::map<std::string, TextRegion>& regions() const { return regions_; }
  void AddRegion(const std::string& id, const TextRegion& region) {
    regions_[id] = region;
  }
  const std::string& css_styles() const { return css_styles_; }
  void set_css_styles(const std::string& styles) { css_styles_ = styles; }
 
  void AddSubStream(uint16_t index, TextSubStreamInfo info) {
    sub_streams_.emplace(index, std::move(info));
  }
  const std::map<uint16_t, TextSubStreamInfo>& sub_streams() const {
    return sub_streams_;
  }
 
 private:
  std::map<std::string, TextRegion> regions_;
  std::map<uint16_t, TextSubStreamInfo> sub_streams_;
  std::string css_styles_;
  uint16_t width_;
  uint16_t height_;
 
  // Allow copying. This is very light weight.
};
 
}  // namespace media
}  // namespace shaka
 
#endif  // PACKAGER_MEDIA_BASE_TEXT_STREAM_INFO_H_