avcodec/cbs_internal, cbs_h2645: Add and use new descriptor macros

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/cbs_h2645.c

@@ -1396,18 +1396,9 @@ static const CodedBitstreamUnitTypeDescriptor cbs_h264_unit_types[] = {
 
     CBS_UNIT_TYPE_INTERNAL_REF(H264_NAL_PPS, H264RawPPS, slice_group_id),
 
-    {
-        .nb_unit_types  = 3,
-        .unit_types     = {
-            H264_NAL_IDR_SLICE,
-            H264_NAL_SLICE,
-            H264_NAL_AUXILIARY_SLICE,
-        },
-        .content_type   = CBS_CONTENT_TYPE_INTERNAL_REFS,
-        .content_size   = sizeof(H264RawSlice),
-        .nb_ref_offsets = 1,
-        .ref_offsets    = { offsetof(H264RawSlice, data) },
-    },
+    CBS_UNIT_TYPES_INTERNAL_REF((H264_NAL_IDR_SLICE,
+                                 H264_NAL_SLICE,
+                                 H264_NAL_AUXILIARY_SLICE), H264RawSlice, data),
 
     CBS_UNIT_TYPE_POD(H264_NAL_AUD,          H264RawAUD),
     CBS_UNIT_TYPE_POD(H264_NAL_FILLER_DATA,  H264RawFiller),
@@ -1433,40 +1424,15 @@ static const CodedBitstreamUnitTypeDescriptor cbs_h265_unit_types[] = {
 
     CBS_UNIT_TYPE_POD(HEVC_NAL_AUD, H265RawAUD),
 
-    {
-        // Slices of non-IRAP pictures.
-        .nb_unit_types         = CBS_UNIT_TYPE_RANGE,
-        .unit_type_range_start = HEVC_NAL_TRAIL_N,
-        .unit_type_range_end   = HEVC_NAL_RASL_R,
-
-        .content_type   = CBS_CONTENT_TYPE_INTERNAL_REFS,
-        .content_size   = sizeof(H265RawSlice),
-        .nb_ref_offsets = 1,
-        .ref_offsets    = { offsetof(H265RawSlice, data) },
-    },
+    // Slices of non-IRAP pictures.
+    CBS_UNIT_RANGE_INTERNAL_REF(HEVC_NAL_TRAIL_N, HEVC_NAL_RASL_R,
+                                H265RawSlice, data),
+    // Slices of IRAP pictures.
+    CBS_UNIT_RANGE_INTERNAL_REF(HEVC_NAL_BLA_W_LP, HEVC_NAL_CRA_NUT,
+                                H265RawSlice, data),
 
-    {
-        // Slices of IRAP pictures.
-        .nb_unit_types         = CBS_UNIT_TYPE_RANGE,
-        .unit_type_range_start = HEVC_NAL_BLA_W_LP,
-        .unit_type_range_end   = HEVC_NAL_CRA_NUT,
-
-        .content_type   = CBS_CONTENT_TYPE_INTERNAL_REFS,
-        .content_size   = sizeof(H265RawSlice),
-        .nb_ref_offsets = 1,
-        .ref_offsets    = { offsetof(H265RawSlice, data) },
-    },
-
-    {
-        .nb_unit_types  = 2,
-        .unit_types     = {
-            HEVC_NAL_SEI_PREFIX,
-            HEVC_NAL_SEI_SUFFIX
-        },
-        .content_type   = CBS_CONTENT_TYPE_COMPLEX,
-        .content_size   = sizeof(H265RawSEI),
-        .content_free   = &cbs_h265_free_sei,
-    },
+    CBS_UNIT_TYPES_COMPLEX((HEVC_NAL_SEI_PREFIX, HEVC_NAL_SEI_SUFFIX),
+                           H265RawSEI, cbs_h265_free_sei),
 
     CBS_UNIT_TYPE_END_OF_LIST
 };

libavcodec/cbs_internal.h

@@ -181,28 +181,45 @@ int ff_cbs_write_signed(CodedBitstreamContext *ctx, PutBitContext *pbc,
 // range_min in the above functions.
 #define MIN_INT_BITS(length) (-(INT64_C(1) << ((length) - 1)))
 
-
+#define TYPE_LIST(...) { __VA_ARGS__ }
 #define CBS_UNIT_TYPE_POD(type, structure) { \
         .nb_unit_types  = 1, \
         .unit_types     = { type }, \
         .content_type   = CBS_CONTENT_TYPE_POD, \
         .content_size   = sizeof(structure), \
     }
-#define CBS_UNIT_TYPE_INTERNAL_REF(type, structure, ref_field) { \
-        .nb_unit_types  = 1, \
-        .unit_types     = { type }, \
+
+#define CBS_UNIT_TYPES_INTERNAL_REF(types, structure, ref_field) { \
+        .nb_unit_types  = FF_ARRAY_ELEMS((CodedBitstreamUnitType[])TYPE_LIST types), \
+        .unit_types     = TYPE_LIST types, \
         .content_type   = CBS_CONTENT_TYPE_INTERNAL_REFS, \
         .content_size   = sizeof(structure), \
         .nb_ref_offsets = 1, \
         .ref_offsets    = { offsetof(structure, ref_field) }, \
     }
-#define CBS_UNIT_TYPE_COMPLEX(type, structure, free_func) { \
-        .nb_unit_types  = 1, \
-        .unit_types     = { type }, \
+#define CBS_UNIT_TYPE_INTERNAL_REF(type, structure, ref_field) \
+    CBS_UNIT_TYPES_INTERNAL_REF((type), structure, ref_field)
+
+#define CBS_UNIT_RANGE_INTERNAL_REF(range_start, range_end, structure, ref_field) { \
+        .nb_unit_types  = CBS_UNIT_TYPE_RANGE, \
+        .unit_type_range_start = range_start, \
+        .unit_type_range_end   = range_end, \
+        .content_type          = CBS_CONTENT_TYPE_INTERNAL_REFS, \
+        .content_size          = sizeof(structure), \
+        .nb_ref_offsets        = 1, \
+        .ref_offsets           = { offsetof(structure, ref_field) }, \
+    }
+
+#define CBS_UNIT_TYPES_COMPLEX(types, structure, free_func) { \
+        .nb_unit_types  = FF_ARRAY_ELEMS((CodedBitstreamUnitType[])TYPE_LIST types), \
+        .unit_types     = TYPE_LIST types, \
         .content_type   = CBS_CONTENT_TYPE_COMPLEX, \
         .content_size   = sizeof(structure), \
         .content_free   = free_func, \
     }
+#define CBS_UNIT_TYPE_COMPLEX(type, structure, free_func) \
+    CBS_UNIT_TYPES_COMPLEX((type), structure, free_func)
+
 #define CBS_UNIT_TYPE_END_OF_LIST { .nb_unit_types = 0 }