h264: factor out calculating the POC count into a separate file

This will allow decoupling the parser from the decoder.

1 files changed, 17 insertions, 0 deletions

diff --git a/libavcodec/h264_parse.h b/libavcodec/h264_parse.h
index 23676b36c7..c47b420e49 100644
--- a/libavcodec/h264_parse.h
+++ b/libavcodec/h264_parse.h
@@ -39,6 +39,19 @@ typedef struct H264PredWeightTable {
     int implicit_weight[48][48][2];
 } H264PredWeightTable;
 
+typedef struct H264POCContext {
+    int poc_lsb;
+    int poc_msb;
+    int delta_poc_bottom;
+    int delta_poc[2];
+    int frame_num;
+    int prev_poc_msb;           ///< poc_msb of the last reference pic for POC type 0
+    int prev_poc_lsb;           ///< poc_lsb of the last reference pic for POC type 0
+    int frame_num_offset;       ///< for POC type 2
+    int prev_frame_num_offset;  ///< for POC type 2
+    int prev_frame_num;         ///< frame_num of the last pic for POC type 1/2
+} H264POCContext;
+
 struct SPS;
 struct PPS;
 
@@ -65,4 +78,8 @@ int ff_h264_parse_ref_count(int *plist_count, int ref_count[2],
                             GetBitContext *gb, const struct PPS *pps,
                             int slice_type_nos, int picture_structure);
 
+int ff_h264_init_poc(int pic_field_poc[2], int *pic_poc,
+                     const struct SPS *sps, H264POCContext *poc,
+                     int picture_structure, int nal_ref_idc);
+
 #endif /* AVCODEC_H264_PARSE_H */