simple_hls_notifier.h

// Copyright 2016 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_HLS_BASE_SIMPLE_HLS_NOTIFIER_H_
#define PACKAGER_HLS_BASE_SIMPLE_HLS_NOTIFIER_H_
 
#include <cstdint>
#include <list>
#include <map>
#include <memory>
#include <string>
#include <vector>
 
#include <absl/synchronization/mutex.h>
 
#include <packager/hls/base/hls_notifier.h>
#include <packager/hls/base/master_playlist.h>
#include <packager/hls/base/media_playlist.h>
#include <packager/hls_params.h>
#include <packager/macros/classes.h>
 
namespace shaka {
namespace hls {
 
class MediaPlaylistFactory {
 public:
  virtual ~MediaPlaylistFactory();
  virtual std::unique_ptr<MediaPlaylist> Create(const HlsParams& hls_params,
                                                const std::string& file_name,
                                                const std::string& name,
                                                const std::string& group_id);
};
 
class SimpleHlsNotifier : public HlsNotifier {
 public:
  explicit SimpleHlsNotifier(const HlsParams& hls_params);
  ~SimpleHlsNotifier() override;
 
  bool Init() override;
  bool NotifyNewStream(const MediaInfo& media_info,
                       const std::string& playlist_name,
                       const std::string& stream_name,
                       const std::string& group_id,
                       uint32_t* stream_id) override;
  bool NotifySampleDuration(uint32_t stream_id,
                            int32_t sample_duration) override;
  bool NotifyNewSegment(uint32_t stream_id,
                        const std::string& segment_name,
                        int64_t start_time,
                        int64_t duration,
                        uint64_t start_byte_offset,
                        uint64_t size) override;
  bool NotifyKeyFrame(uint32_t stream_id,
                      int64_t timestamp,
                      uint64_t start_byte_offset,
                      uint64_t size) override;
  bool NotifyCueEvent(uint32_t container_id, int64_t timestamp) override;
  bool NotifyEncryptionUpdate(
      uint32_t stream_id,
      const std::vector<uint8_t>& key_id,
      const std::vector<uint8_t>& system_id,
      const std::vector<uint8_t>& iv,
      const std::vector<uint8_t>& protection_system_specific_data) override;
  bool Flush() override;
 
 protected:
  const absl::Time& reference_time() const { return reference_time_; }
 
 private:
  friend class SimpleHlsNotifierTest;
 
  struct StreamEntry {
    std::unique_ptr<MediaPlaylist> media_playlist;
    MediaPlaylist::EncryptionMethod encryption_method;
  };
 
  std::string master_playlist_dir_;
  int32_t target_duration_ = 0;
 
  std::unique_ptr<MediaPlaylistFactory> media_playlist_factory_;
  std::unique_ptr<MasterPlaylist> master_playlist_;
 
  // Maps to unique_ptr because StreamEntry also holds unique_ptr
  std::map<uint32_t, std::unique_ptr<StreamEntry>> stream_map_;
  std::list<MediaPlaylist*> media_playlists_;
 
  uint32_t sequence_number_ = 0;
 
  absl::Mutex lock_;
  absl::Time reference_time_ = absl::InfinitePast();
 
  DISALLOW_COPY_AND_ASSIGN(SimpleHlsNotifier);
};
 
}  // namespace hls
}  // namespace shaka
 
#endif  // PACKAGER_HLS_BASE_SIMPLE_HLS_NOTIFIER_H_