diff --git a/mpp/codec/inc/mpp_buf_slot.h b/mpp/codec/inc/mpp_buf_slot.h
index 15cc77ef..1b5a155b 100644
--- a/mpp/codec/inc/mpp_buf_slot.h
+++ b/mpp/codec/inc/mpp_buf_slot.h
@@ -162,9 +162,23 @@ MPP_RET mpp_buf_slot_clr_decoding(MppBufSlots slots, RK_U32 index);
 MPP_RET mpp_buf_slot_set_display(MppBufSlots slots, RK_U32 index);
 MPP_RET mpp_buf_slot_clr_display(MppBufSlots slots, RK_U32 index);
 
-
-MPP_RET mpp_buf_slot_set_buffer(MppBufSlots slots, RK_U32 index, MppBuffer buffer);
-MppBuffer mpp_buf_slot_get_buffer(const MppBufSlots slots, RK_U32 index);
+/*
+ * mpp_buf_slot_set_buffer
+ *      - called by dec thread when find a output index has not buffer
+ *
+ * mpp_buf_slot_get_buffer
+ *      - called by hal module on register generation
+ *
+ * mpp_buf_slot_set_pts
+ *      - called by parser when decoding a new frame
+ *
+ * mpp_buf_slot_get_pts
+ *      - called by hal thread when output a frame
+ */
+MPP_RET     mpp_buf_slot_set_buffer(MppBufSlots slots, RK_U32 index, MppBuffer buffer);
+MppBuffer   mpp_buf_slot_get_buffer(const MppBufSlots slots, RK_U32 index);
+MPP_RET     mpp_buf_slot_set_pts(MppBufSlots slots, RK_U32 index, RK_S64 pts);
+RK_S64      mpp_buf_slot_get_pts(const MppBufSlots slots, RK_U32 index);
 
 #ifdef __cplusplus
 }
diff --git a/mpp/codec/mpp_buf_slot.cpp b/mpp/codec/mpp_buf_slot.cpp
index 7618c21f..3adbca54 100644
--- a/mpp/codec/mpp_buf_slot.cpp
+++ b/mpp/codec/mpp_buf_slot.cpp
@@ -33,6 +33,7 @@
 typedef struct MppBufSlotEntry_t {
     MppBuffer   buffer;
     RK_U32      status;
+    RK_S64      pts;
 } MppBufSlotEntry;
 
 typedef struct MppBufSlotsImpl_t {
@@ -320,3 +321,32 @@ MppBuffer mpp_buf_slot_get_buffer(const MppBufSlots slots, RK_U32 index)
     return slot[index].buffer;
 }
 
+MPP_RET mpp_buf_slot_set_pts(MppBufSlots slots, RK_U32 index, RK_S64 pts)
+{
+    if (NULL == slots) {
+        mpp_err_f("found NULL input\n");
+        return MPP_ERR_NULL_PTR;
+    }
+
+    MppBufSlotsImpl *impl = (MppBufSlotsImpl *)slots;
+    Mutex::Autolock auto_lock(impl->lock);
+    MppBufSlotEntry *slot = impl->slots;
+    mpp_assert(index < impl->count);
+    slot[index].pts = pts;
+    return MPP_OK;
+}
+
+RK_S64 mpp_buf_slot_get_pts(const MppBufSlots slots, RK_U32 index)
+{
+    if (NULL == slots) {
+        mpp_err_f("found NULL input\n");
+        return NULL;
+    }
+
+    MppBufSlotsImpl *impl = (MppBufSlotsImpl *)slots;
+    Mutex::Autolock auto_lock(impl->lock);
+    MppBufSlotEntry *slot = impl->slots;
+    mpp_assert(index < impl->count);
+    return slot[index].pts;
+}
+