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util/MP4/box_trun.cpp

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+#include "box.cpp"
+#include <vector>
+
+struct trun_sampleinformationstructure {
+  uint32_t SampleDuration;
+  uint32_t SampleSize;
+};
+
+class Box_trun {
+  public:
+    Box_trun( );
+    ~Box_trun();
+    Box * GetBox();
+    void SetDataOffset( uint32_t Offset = 0 );
+    void AddSampleInformation( uint32_t SampleDuration = 0, uint32_t SampleSize = 0, uint32_t Offset = 0 );
+    void WriteContent( );
+  private:
+    void SetDefaults( );
+    bool setSampleDuration;
+    bool setSampleSize;
+    uint32_t curDataOffset;
+    std::vector<trun_sampleinformationstructure> SampleInfo;
+    Box * Container;
+};//Box_ftyp Class
+
+Box_trun::Box_trun( ) {
+  Container = new Box( 0x74666864 );
+  SetDefaults( );
+}
+
+Box_trun::~Box_trun() {
+  delete Container;
+}
+
+Box * Box_trun::GetBox() {
+  return Container;
+}
+
+void Box_trun::SetDataOffset( uint32_t Offset ) {
+  curDataOffset = Offset;
+}
+
+void Box_trun::WriteContent( ) {
+  uint32_t curoffset;
+  uint32_t flags = 0 & ( curDataOffset ? 0x1 : 0 ) & ( setSampleDuration ? 0x100 : 0 ) & ( setSampleSize ? 0x200 : 0 );
+  Container->SetPayload((uint32_t)4,Box::uint32_to_uint8(flags));
+  Container->SetPayload((uint32_t)4,Box::uint32_to_uint8(SampleInfo.size()),4);
+  curoffset = 8;
+  if( curDataOffset ) {
+    Container->SetPayload((uint32_t)4,Box::uint32_to_uint8(curDataOffset),curoffset);
+    curoffset += 4;
+  }
+  for( uint32_t i = 0; i < SampleInfo.size(); i++ ) {
+    if( setSampleDuration ) {
+      Container->SetPayload((uint32_t)4,Box::uint32_to_uint8(SampleInfo[i].SampleDuration),curoffset);
+      curoffset += 4;
+    }
+    if( setSampleSize ) {
+      Container->SetPayload((uint32_t)4,Box::uint32_to_uint8(SampleInfo[i].SampleSize),curoffset);
+      curoffset += 4;
+    }
+  }
+}
+
+void Box_trun::SetDefaults( ) {
+  setSampleDuration = false;
+  setSampleSize = false;
+}