h264: switch to h2645_parse for NAL parsing

libavcodec/Makefile

@@ -252,7 +252,8 @@ OBJS-$(CONFIG_H264_DECODER)            += h264.o h264_cabac.o h264_cavlc.o \
                                           h264_direct.o h264_loopfilter.o  \
                                           h264_mb.o h264_picture.o h264_ps.o \
                                           h264_refs.o h264_sei.o \
-                                          h264_slice.o h264data.o h264_parse.o
+                                          h264_slice.o h264data.o h264_parse.o \
+                                          h2645_parse.o
 OBJS-$(CONFIG_H264_MMAL_DECODER)       += mmaldec.o
 OBJS-$(CONFIG_H264_NVENC_ENCODER)      += nvenc_h264.o
 OBJS-$(CONFIG_H264_QSV_DECODER)        += qsvdec_h2645.o

libavcodec/h264.h

@@ -34,6 +34,7 @@
 #include "error_resilience.h"
 #include "get_bits.h"
 #include "h264_parse.h"
+#include "h2645_parse.h"
 #include "h264chroma.h"
 #include "h264dsp.h"
 #include "h264pred.h"
@@ -471,6 +472,8 @@ typedef struct H264Context {
     H264SliceContext *slice_ctx;
     int            nb_slice_ctx;
 
+    H2645Packet pkt;
+
     int pixel_shift;    ///< 0 for 8-bit H264, 1 for high-bit-depth H264
 
     /* coded dimensions -- 16 * mb w/h */