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       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim: set ts=8 sts=2 et sw=2 tw=80: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #ifndef SEEK_TARGET_H
       8             : #define SEEK_TARGET_H
       9             : 
      10             : #include "TimeUnits.h"
      11             : 
      12             : namespace mozilla {
      13             : 
      14             : enum class MediaDecoderEventVisibility : int8_t
      15             : {
      16             :   Observable,
      17             :   Suppressed
      18             : };
      19             : 
      20             : // Stores the seek target; the time to seek to, and whether an Accurate,
      21             : // "Fast" (nearest keyframe), or "Video Only" (no audio seek) seek was
      22             : // requested.
      23             : struct SeekTarget
      24             : {
      25             :   enum Type
      26             :   {
      27             :     Invalid,
      28             :     PrevSyncPoint,
      29             :     Accurate,
      30             :     NextFrame,
      31             :   };
      32           0 :   SeekTarget()
      33           0 :     : mTime(media::TimeUnit::Invalid())
      34             :     , mType(SeekTarget::Invalid)
      35           0 :     , mVideoOnly(false)
      36             :   {
      37           0 :   }
      38           0 :   SeekTarget(int64_t aTimeUsecs, Type aType, bool aVideoOnly = false)
      39           0 :     : mTime(media::TimeUnit::FromMicroseconds(aTimeUsecs))
      40             :     , mType(aType)
      41           0 :     , mVideoOnly(aVideoOnly)
      42             :   {
      43           0 :   }
      44           0 :   SeekTarget(const media::TimeUnit& aTime, Type aType, bool aVideoOnly = false)
      45           0 :     : mTime(aTime)
      46             :     , mType(aType)
      47           0 :     , mVideoOnly(aVideoOnly)
      48             :   {
      49           0 :   }
      50           0 :   SeekTarget(const SeekTarget& aOther)
      51           0 :     : mTime(aOther.mTime)
      52           0 :     , mType(aOther.mType)
      53           0 :     , mVideoOnly(aOther.mVideoOnly)
      54             :   {
      55           0 :   }
      56             :   bool IsValid() const { return mType != SeekTarget::Invalid; }
      57             :   void Reset()
      58             :   {
      59             :     mTime = media::TimeUnit::Invalid();
      60             :     mType = SeekTarget::Invalid;
      61             :     mVideoOnly = false;
      62             :   }
      63           0 :   media::TimeUnit GetTime() const
      64             :   {
      65           0 :     NS_ASSERTION(mTime.IsValid(), "Invalid SeekTarget");
      66           0 :     return mTime;
      67             :   }
      68           0 :   void SetTime(const media::TimeUnit& aTime)
      69             :   {
      70           0 :     NS_ASSERTION(aTime.IsValid(), "Invalid SeekTarget destination");
      71           0 :     mTime = aTime;
      72           0 :   }
      73           0 :   void SetType(Type aType) { mType = aType; }
      74             :   void SetVideoOnly(bool aVideoOnly) { mVideoOnly = aVideoOnly; }
      75           0 :   bool IsFast() const { return mType == SeekTarget::Type::PrevSyncPoint; }
      76           0 :   bool IsAccurate() const { return mType == SeekTarget::Type::Accurate; }
      77           0 :   bool IsNextFrame() const { return mType == SeekTarget::Type::NextFrame; }
      78           0 :   bool IsVideoOnly() const { return mVideoOnly; }
      79             : 
      80             : private:
      81             :   // Seek target time.
      82             :   media::TimeUnit mTime;
      83             :   // Whether we should seek "Fast", or "Accurate".
      84             :   // "Fast" seeks to the seek point preceding mTime, whereas
      85             :   // "Accurate" seeks as close as possible to mTime.
      86             :   Type mType;
      87             :   bool mVideoOnly;
      88             : };
      89             : 
      90             : } // namespace mozilla
      91             : 
      92             : #endif /* SEEK_TARGET_H */