diff --git a/app/src/main/cpp/AVpacket_queue.c b/app/src/main/cpp/AVpacket_queue.c
index 3ed1f0e..74d9627 100644
--- a/app/src/main/cpp/AVpacket_queue.c
+++ b/app/src/main/cpp/AVpacket_queue.c
@@ -6,39 +6,38 @@
 #include <libavcodec/avcodec.h>
 
 
-AVPacketQueue* queue_init(int size){
-    AVPacketQueue* queue = malloc(sizeof(AVPacketQueue));
+AVPacketQueue *queue_init(int size) {
+    AVPacketQueue *queue = malloc(sizeof(AVPacketQueue));
     queue->size = size;
     queue->next_to_read = 0;
     queue->next_to_write = 0;
     int i;
     queue->packets = malloc(sizeof(*queue->packets) * size);
-    for(i = 0; i < size; i++){
+    for (i = 0; i < size; i++) {
         queue->packets[i] = malloc(sizeof(AVPacket));
     }
     return queue;
 }
 
-void queue_free(AVPacketQueue *queue){
+void queue_free(AVPacketQueue *queue) {
     int i;
-    for(i=0; i<queue->size; i++){
+    for (i = 0; i < queue->size; i++) {
         free(queue->packets[i]);
     }
     free(queue->packets);
     free(queue);
 }
 
-int queue_next(AVPacketQueue* queue, int current){
-    return (current+1) % queue->size;
+int queue_next(AVPacketQueue *queue, int current) {
+    return (current + 1) % queue->size;
 }
 
-void* queue_push(AVPacketQueue* queue, pthread_mutex_t* mutex, pthread_cond_t* cond){
+void *queue_push(AVPacketQueue *queue, pthread_mutex_t *mutex, pthread_cond_t *cond) {
     int current = queue->next_to_write;
     int next_to_write;
-    for(;;){
+    for (;;) {
         next_to_write = queue_next(queue, current);
-        //写的不等于读的，跳出循环
-        if(next_to_write != queue->next_to_read){
+        if (next_to_write != queue->next_to_read) {
             break;
         }
         pthread_cond_wait(cond, mutex);
@@ -48,11 +47,10 @@ void* queue_push(AVPacketQueue* queue, pthread_mutex_t* mutex, pthread_cond_t* c
     return queue->packets[current];
 }
 
-void* queue_pop(AVPacketQueue* queue, pthread_mutex_t* mutex, pthread_cond_t* cond){
+void *queue_pop(AVPacketQueue *queue, pthread_mutex_t *mutex, pthread_cond_t *cond) {
     int current = queue->next_to_read;
-    for(;;){
-        //写的不等于读的，跳出循环
-        if(queue->next_to_write != queue->next_to_read){
+    for (;;) {
+        if (queue->next_to_write != queue->next_to_read) {
             break;
         }
         pthread_cond_wait(cond, mutex);
diff --git a/app/src/main/cpp/AVpacket_queue.h b/app/src/main/cpp/AVpacket_queue.h
index 3e899f8..1497a7d 100644
--- a/app/src/main/cpp/AVpacket_queue.h
+++ b/app/src/main/cpp/AVpacket_queue.h
@@ -4,22 +4,26 @@
 
 #ifndef VIDEOPLAYER_AVPACKET_QUEUE_H
 #define VIDEOPLAYER_AVPACKET_QUEUE_H
+
 #include <pthread.h>
 
-typedef struct AVPacketQueue{
-    //队列大小
+typedef struct AVPacketQueue {
+    //the size of queue
     int size;
-    //指针数组
-    void ** packets;
-    //下一个写入的packet
+    //packet array
+    void **packets;
+    //the packet next to write
     int next_to_write;
-    //下一个读取的packet
+    //the packet next to read
     int next_to_read;
-}AVPacketQueue;
+} AVPacketQueue;
+
+AVPacketQueue *queue_init(int size);
 
-AVPacketQueue* queue_init(int size);
 void queue_free(AVPacketQueue *queue);
-void* queue_push(AVPacketQueue* queue, pthread_mutex_t* mutex, pthread_cond_t* cond);
-void* queue_pop(AVPacketQueue* queue, pthread_mutex_t* mutex, pthread_cond_t* cond);
+
+void *queue_push(AVPacketQueue *queue, pthread_mutex_t *mutex, pthread_cond_t *cond);
+
+void *queue_pop(AVPacketQueue *queue, pthread_mutex_t *mutex, pthread_cond_t *cond);
 
 #endif //VIDEOPLAYER_AVPACKET_QUEUE_H
\ No newline at end of file