tor-browser

The Tor Browser
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EncodedFrame.h (2206B)

      1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
      4 * You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 #ifndef EncodedFrame_h_
      7 #define EncodedFrame_h_
      8 
      9 #include "TimeUnits.h"
     10 #include "VideoUtils.h"
     11 #include "mozilla/media/MediaUtils.h"
     12 #include "nsISupportsImpl.h"
     13 
     14 namespace mozilla {
     15 
     16 // Represent an encoded frame emitted by an encoder
     17 class EncodedFrame final {
     18  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(EncodedFrame)
     19 public:
     20  enum FrameType {
     21    VP8_I_FRAME,       // VP8 intraframe
     22    VP8_P_FRAME,       // VP8 predicted frame
     23    OPUS_AUDIO_FRAME,  // Opus audio frame
     24    UNKNOWN            // FrameType not set
     25  };
     26  using ConstFrameData = const media::Refcountable<nsTArray<uint8_t>>;
     27  using FrameData = media::Refcountable<nsTArray<uint8_t>>;
     28  EncodedFrame(const media::TimeUnit& aTime, uint64_t aDuration,
     29               uint64_t aDurationBase, FrameType aFrameType,
     30               RefPtr<ConstFrameData> aData)
     31      : mTime(aTime),
     32        mDuration(aDuration),
     33        mDurationBase(aDurationBase),
     34        mFrameType(aFrameType),
     35        mFrameData(std::move(aData)) {
     36    MOZ_ASSERT(mFrameData);
     37    MOZ_ASSERT_IF(mFrameType == VP8_I_FRAME, mDurationBase == PR_USEC_PER_SEC);
     38    MOZ_ASSERT_IF(mFrameType == VP8_P_FRAME, mDurationBase == PR_USEC_PER_SEC);
     39    MOZ_ASSERT_IF(mFrameType == OPUS_AUDIO_FRAME, mDurationBase == 48000);
     40  }
     41  // Timestamp in microseconds
     42  const media::TimeUnit mTime;
     43  // The playback duration of this packet in mDurationBase.
     44  const uint64_t mDuration;
     45  // The time base of mDuration.
     46  const uint64_t mDurationBase;
     47  // Represent what is in the FrameData
     48  const FrameType mFrameType;
     49  // Encoded data
     50  const RefPtr<ConstFrameData> mFrameData;
     51 
     52  // The end time of the frame in microseconds.
     53  media::TimeUnit GetEndTime() const {
     54    return mTime + media::TimeUnit(mDuration, mDurationBase);
     55  }
     56 
     57 private:
     58  // Private destructor, to discourage deletion outside of Release():
     59  ~EncodedFrame() = default;
     60 };
     61 
     62 }  // namespace mozilla
     63 
     64 #endif  // EncodedFrame_h_