Add functions for converting between pre- and post-cutlist frame numb…

…ers. Refs #8631. These functions are not actually used anywhere yet.
MythTV · Apr 12, 2012 · 769059b · 769059b
1 parent 6114ecd
commit 769059b
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Showing 3 changed files with 76 additions and 0 deletions.
diff --git a/mythtv/libs/libmythtv/deletemap.cpp b/mythtv/libs/libmythtv/deletemap.cpp
@@ -839,3 +839,63 @@ bool DeleteMap::IsSaved(void) const
 
     return currentMap == savedMap;
 }
+
+uint64_t DeleteMap::TranslatePositionAbsToRel(const frm_dir_map_t &deleteMap,
+                                              uint64_t absPosition)
+{
+    uint64_t subtraction = 0;
+    uint64_t startOfCutRegion = 0;
+    frm_dir_map_t::const_iterator i;
+    bool withinCut = false;
+    bool first = true;
+    for (i = deleteMap.constBegin(); i != deleteMap.constEnd(); ++i)
+    {
+        if (first)
+            withinCut = (i.value() == MARK_CUT_END);
+        first = false;
+        if (i.key() > absPosition)
+            break;
+        if (i.value() == MARK_CUT_START && !withinCut)
+        {
+            withinCut = true;
+            startOfCutRegion = i.key();
+        }
+        else if (i.value() == MARK_CUT_END && withinCut)
+        {
+            withinCut = false;
+            subtraction += (i.key() - startOfCutRegion);
+        }
+    }
+    if (withinCut)
+        subtraction += (absPosition - startOfCutRegion);
+    return absPosition - subtraction;
+}
+
+uint64_t DeleteMap::TranslatePositionRelToAbs(const frm_dir_map_t &deleteMap,
+                                              uint64_t relPosition)
+{
+    uint64_t addition = 0;
+    uint64_t startOfCutRegion = 0;
+    frm_dir_map_t::const_iterator i;
+    bool withinCut = false;
+    bool first = true;
+    for (i = deleteMap.constBegin(); i != deleteMap.constEnd(); ++i)
+    {
+        if (first)
+            withinCut = (i.value() == MARK_CUT_END);
+        first = false;
+        if (i.value() == MARK_CUT_START && !withinCut)
+        {
+            withinCut = true;
+            startOfCutRegion = i.key();
+            if (relPosition + addition <= startOfCutRegion)
+                break;
+        }
+        else if (i.value() == MARK_CUT_END && withinCut)
+        {
+            withinCut = false;
+            addition += (i.key() - startOfCutRegion);
+        }
+    }
+    return relPosition + addition;
+}
diff --git a/mythtv/libs/libmythtv/deletemap.h b/mythtv/libs/libmythtv/deletemap.h
@@ -66,6 +66,16 @@ class MTV_PUBLIC DeleteMap
     bool     IsTemporaryMark(uint64_t frame) const;
     bool     HasTemporaryMark(void) const;
     uint64_t GetLastFrame(uint64_t total) const;
+    uint64_t TranslatePositionAbsToRel(uint64_t absPosition) const {
+        return TranslatePositionAbsToRel(m_deleteMap, absPosition);
+    }
+    uint64_t TranslatePositionRelToAbs(uint64_t relPosition) const {
+        return TranslatePositionRelToAbs(m_deleteMap, relPosition);
+    }
+    static uint64_t TranslatePositionAbsToRel(const frm_dir_map_t &deleteMap,
+                                              uint64_t absPosition);
+    static uint64_t TranslatePositionRelToAbs(const frm_dir_map_t &deleteMap,
+                                              uint64_t relPosition);
 
     void TrackerReset(uint64_t frame, uint64_t total);
     bool TrackerWantsToJump(uint64_t frame, uint64_t total, uint64_t &to);

diff --git a/mythtv/libs/libmythtv/mythplayer.h b/mythtv/libs/libmythtv/mythplayer.h
@@ -381,6 +381,12 @@ class MTV_PUBLIC MythPlayer
     virtual long long CalcMaxFFTime(long long ff, bool setjump = true) const;
     long long CalcRWTime(long long rw) const;
     virtual void calcSliderPos(osdInfo &info, bool paddedFields = false);
+    uint64_t TranslatePositionAbsToRel(uint64_t absPosition) {
+        return deleteMap.TranslatePositionAbsToRel(absPosition);
+    }
+    uint64_t TranslatePositionRelToAbs(uint64_t relPosition) {
+        return deleteMap.TranslatePositionRelToAbs(relPosition);
+    }
 
     // Commercial stuff
     void SetAutoCommercialSkip(CommSkipMode autoskip)