pssh_generator.h

// Copyright 2017 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 PACKAGER_MEDIA_BASE_PSSH_GENERATOR_H_
#define PACKAGER_MEDIA_BASE_PSSH_GENERATOR_H_

#include <vector>

#include "packager/base/optional.h"
#include "packager/media/base/protection_system_specific_info.h"
#include "packager/status.h"

// TODO(hmchen): move pssh related files into a sperate folder.
namespace shaka {
namespace media {

struct EncryptionKey;

class PsshGenerator {
 public:
  PsshGenerator();
  virtual ~PsshGenerator() = 0;

  virtual bool SupportMultipleKeys() = 0;

  Status GeneratePsshFromKeyIds(
      const std::vector<std::vector<uint8_t>>& key_ids,
      ProtectionSystemSpecificInfo* info) const;

  Status GeneratePsshFromKeyIdAndKey(const std::vector<uint8_t>& key_id,
                                     const std::vector<uint8_t>& key,
                                     ProtectionSystemSpecificInfo* info) const;

 private:
  virtual base::Optional<std::vector<uint8_t>> GeneratePsshDataFromKeyIds(
      const std::vector<std::vector<uint8_t>>& key_ids) const = 0;

  virtual base::Optional<std::vector<uint8_t>> GeneratePsshDataFromKeyIdAndKey(
      const std::vector<uint8_t>& key_id,
      const std::vector<uint8_t>& key) const = 0;

  virtual uint8_t PsshBoxVersion() const = 0;

  virtual const std::vector<uint8_t>& SystemId() const = 0;
};

}  // namespace media
}  // namespace shaka

#endif  // PACKAGER_MEDIA_BASE_PSSH_GENERATOR_H_