media_key.h

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// Copyright 2020 Samsung Electronics
// TizenTV Emscripten extensions are available under two separate licenses, the
// MIT license and the University of Illinois/NCSA Open Source License.  Both
// these licenses can be found in the LICENSE file.

#ifndef INCLUDE_SAMSUNG_WASM_MEDIA_KEY_H_
#define INCLUDE_SAMSUNG_WASM_MEDIA_KEY_H_

#include <cstdint>
#include <functional>
#include <string>
#include <vector>

#include "samsung/wasm/common.h"

namespace samsung {
namespace wasm {

enum class EncryptionMode {
  kUnknown,  
  kCenc,     
  kCbcs,     
};

enum class ContentDecryptionModule {
  kUnknown,    
  kPlayready,  
  kWidevine,   
};

enum class Robustness {
  kEmpty,
  kSWSecureCrypto,
  kSWSecureDecode,
  kHWSecureCrypto,
  kHWSecureDecode,
  kHWSecureAll,
};

struct DRMConfig {
  ContentDecryptionModule cdm;

  EncryptionMode encryption_mode;

  std::string license_server;

  std::vector<uint8_t> init_data;

  std::string audio_mime_type;

  Robustness audio_robustness;

  std::string video_mime_type;

  Robustness video_robustness;
};

class MediaKey final {
 public:
  using SetupFinishedCallback = std::function<void(OperationResult, MediaKey)>;

  MediaKey();
  MediaKey(const MediaKey&) = delete;
  MediaKey(MediaKey&& other);
  MediaKey& operator=(const MediaKey&) = delete;
  MediaKey& operator=(MediaKey&&);
  ~MediaKey();

  bool IsValid() const;

  static Result<void> SetupEncryption(const DRMConfig& config,
                                      SetupFinishedCallback on_finished);

 private:
  struct AsyncImpl;

  explicit MediaKey(int handle);

  int handle_;

  // access to handle_
  friend class ElementaryMediaTrack;
};

}  // namespace wasm
}  // namespace samsung

#endif  // INCLUDE_SAMSUNG_WASM_MEDIA_KEY_H_