text_padder.h

// Copyright 2018 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_FORMATS_WEBVTT_TEXT_PADDER_H_
#define PACKAGER_MEDIA_FORMATS_WEBVTT_TEXT_PADDER_H_
 
#include <cstdint>
#include <memory>
 
#include <packager/media/base/media_handler.h>
#include <packager/status.h>
 
namespace shaka {
namespace media {
 
class TextPadder : public MediaHandler {
 public:
  explicit TextPadder(int64_t zero_start_bias_ms);
  ~TextPadder() override = default;
 
 private:
  TextPadder(const TextPadder&) = delete;
  TextPadder& operator=(const TextPadder&) = delete;
 
  Status InitializeInternal() override;
 
  Status Process(std::unique_ptr<StreamData> data) override;
  Status OnTextSample(std::unique_ptr<StreamData> data);
 
  const int64_t zero_start_bias_ms_;
  // Will be set once we see our first sample. Using -1 to signal that we have
  // not seen the first sample yet.
  int64_t max_end_time_ms_ = -1;
};
 
}  // namespace media
}  // namespace shaka
 
#endif  // MEDIA_FORMATS_WEBVTT_TEXT_PADDER_H_