third_party/chromium/media/base/android/media_crypto_context.h

// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MEDIA_BASE_ANDROID_MEDIA_CRYPTO_CONTEXT_H_
#define MEDIA_BASE_ANDROID_MEDIA_CRYPTO_CONTEXT_H_

#include <memory>

#include "base/callback.h"
#include "base/macros.h"
#include "media/base/android/android_util.h"
#include "media/base/media_export.h"

namespace media {

// A class that provides MediaCrypto from MediaDrm to support decrypting and
// decoding of encrypted streams, typically by MediaCodec-based decoders.
//
// Methods can be called on any thread. The registered callbacks can be fired
// on any thread. The caller should make sure that the callbacks are posted to
// the correct thread.
class MEDIA_EXPORT MediaCryptoContext {
 public:
  MediaCryptoContext() = default;

  MediaCryptoContext(const MediaCryptoContext&) = delete;
  MediaCryptoContext& operator=(const MediaCryptoContext&) = delete;

  virtual ~MediaCryptoContext() = default;

  // Notification called when MediaCrypto object is ready.
  // Parameters:
  // |media_crypto| - global reference to MediaCrypto object. |media_crypto| is
  //                  always a non-null std::unique_ptr, but the JavaRef it
  //                  contains can point to a null object.
  // |requires_secure_video_codec| - true if secure video decoder is required.
  //                                 Should be ignored if |media_crypto|
  //                                 contains null MediaCrypto object.
  using MediaCryptoReadyCB =
      base::OnceCallback<void(JavaObjectPtr media_crypto,
                              bool requires_secure_video_codec)>;
  virtual void SetMediaCryptoReadyCB(
      MediaCryptoReadyCB media_crypto_ready_cb) = 0;
};

}  // namespace media

#endif  // MEDIA_BASE_ANDROID_MEDIA_CRYPTO_CONTEXT_H_