html_media_element.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_HTML_HTML_MEDIA_ELEMENT_H_
#define INCLUDE_SAMSUNG_HTML_HTML_MEDIA_ELEMENT_H_

#include <functional>
#include <string>

#include "samsung/wasm/common.h"
#include "samsung/wasm/operation_result.h"

namespace samsung {

namespace wasm {

class ElementaryMediaStreamSource;
class ElementaryMediaStreamSourceListener;
enum class OperationResult;

}  // namespace wasm

namespace html {

class HTMLMediaElementListener;

class HTMLMediaElement final {
 public:
  enum class ReadyState {
    kHaveNothing,
    kHaveMetadata,
    kHaveCurrentData,
    kHaveFutureData,
    kHaveEnoughData,
  };

  explicit HTMLMediaElement(const char* id);
  HTMLMediaElement(const HTMLMediaElement&) = delete;
  HTMLMediaElement(HTMLMediaElement&&);
  HTMLMediaElement& operator=(const HTMLMediaElement&) = delete;
  HTMLMediaElement& operator=(HTMLMediaElement&&);
  ~HTMLMediaElement();

  bool IsValid() const;

  wasm::Result<bool> IsAutoplay() const;
  wasm::Result<void> SetAutoplay(bool new_autoplay);

  wasm::Result<wasm::Seconds> GetCurrentTime() const;
  wasm::Result<void> SetCurrentTime(wasm::Seconds new_time);

  wasm::Result<wasm::Seconds> GetDuration() const;
  wasm::Result<bool> IsEnded() const;

  wasm::Result<bool> IsLoop() const;
  wasm::Result<void> SetLoop(bool new_loop);

  wasm::Result<bool> IsPaused() const;

  wasm::Result<ReadyState> GetReadyState() const;

  wasm::Result<std::string> GetSrc() const;

  bool HasSrc() const;

  wasm::Result<void> SetSrc(wasm::ElementaryMediaStreamSource* source);

  wasm::Result<void> Play(
      std::function<void(wasm::OperationResult)> finished_callback);
  wasm::Result<void> Pause();

  wasm::Result<void> SetListener(HTMLMediaElementListener* listener);

 private:
  wasm::OperationResult SetListenerInternal(HTMLMediaElementListener* listener);

  // legacy EMSS compatibility: methods
  wasm::Result<void> RegisterOnTimeUpdateEMSS(
      wasm::ElementaryMediaStreamSourceListener*,
      int source_handle);
  void UnregisterOnTimeUpdateEMSS(int source_handle);

  int handle_;
  HTMLMediaElementListener* listener_;

  // legacy EMSS compatibility: variables
  wasm::ElementaryMediaStreamSource* source_;

  friend class wasm::ElementaryMediaStreamSource;
};

}  // namespace html
}  // namespace samsung

#endif  // INCLUDE_SAMSUNG_HTML_HTML_MEDIA_ELEMENT_H_