我使用#include <iostream>
struct Node
{
int value;
struct Node *next;
};
struct List
{
struct Node *first, *last;
};
Node* node(int v)
{
Node *newNode = new Node();
newNode->value = v;
newNode->next = NULL;
return newNode;
}
List* list()
{
List *newList = new List();
newList->first = NULL;
newList->last = NULL;
return newList;
}
List* insert(List* s, Node* n)
{
if (s->last == NULL)
{
n->next = s->last;
s->last = n;
s->first = n;
return s;
}
s->last->next = n;
s->last = s->last->next;
return s;
}
void print(List* s)
{
Node *tmp = s->first;
while(tmp)
{
std::cout << tmp->value << ' ';
tmp = tmp->next;
}
std::cout << '\n';
}
List* insertAfter(List* s, Node* curr, Node* n)
{
Node *currListNode = s->first;
while(currListNode != NULL)
{
if (currListNode->value == curr->value)
{
n->next = currListNode->next;
currListNode->next = n;
break;
}
currListNode = currListNode->next;
}
return s;
}
List* insertBefore(List* s, Node* curr, Node* n)
{
Node* prev = s->first;
Node* currListNode = s->first->next;
while(currListNode != NULL)
{
if(currListNode->value == curr->value)
{
break;
}
else
{
prev = currListNode;
currListNode = currListNode->next;
}
}
if(currListNode != NULL)
{
prev->next = n;
n->next = currListNode;
}
return s;
}
void deleteList(List *s)
{
Node * curr = s->first;
while (s->first != NULL)
{
s->first = s->first->next;
delete curr;
curr = s->first;
}
delete s;
}
int main(int argc, char *argv[])
{
List *myList2;
myList2 = list();
myList2 = insert(myList2, node(3));
myList2 = insert(myList2, node(5));
myList2 = insert(myList2, node(7));
myList2 = insert(myList2, node(9));
myList2 = insert(myList2, node(5));
myList2 = insert(myList2, node(34));
myList2 = insert(myList2, node(67));
myList2 = insertBefore(myList2, node(9), node(1024));
myList2 = insertAfter(myList2, node(9), node(1024));
print(myList2);
deleteList(myList2);
}
获取timed_text_track_id并使用它将给定视频流的内部字幕更改为mediaplayer.trackinfo。
当我使用SelectTrack更改此视频视图中的内部dvbsub字幕轨道时，我收到如下错误：
mediaplayer.selecttrack(timed_text_track_id)当我使用相同的代码在同一视频流上选择音轨时，没有错误，音轨也会改变。