diff --git a/libavcodec/cbs.c b/libavcodec/cbs.c
index 57b57238ed..07ae658a4c 100644
--- a/libavcodec/cbs.c
+++ b/libavcodec/cbs.c
@@ -695,26 +695,6 @@ int ff_cbs_write_signed(CodedBitstreamContext *ctx, PutBitContext *pbc,
 }
 
 
-int ff_cbs_alloc_unit_content(CodedBitstreamUnit *unit,
-                              size_t size,
-                              void (*free)(void *opaque, uint8_t *data))
-{
-    av_assert0(!unit->content && !unit->content_ref);
-
-    unit->content = av_mallocz(size);
-    if (!unit->content)
-        return AVERROR(ENOMEM);
-
-    unit->content_ref = av_buffer_create(unit->content, size,
-                                         free, NULL, 0);
-    if (!unit->content_ref) {
-        av_freep(&unit->content);
-        return AVERROR(ENOMEM);
-    }
-
-    return 0;
-}
-
 static int cbs_insert_unit(CodedBitstreamFragment *frag,
                            int position)
 {
@@ -893,8 +873,8 @@ static const CodedBitstreamUnitTypeDescriptor
     return NULL;
 }
 
-int ff_cbs_alloc_unit_content2(CodedBitstreamContext *ctx,
-                               CodedBitstreamUnit *unit)
+int ff_cbs_alloc_unit_content(CodedBitstreamContext *ctx,
+                              CodedBitstreamUnit *unit)
 {
     const CodedBitstreamUnitTypeDescriptor *desc;
 
diff --git a/libavcodec/cbs.h b/libavcodec/cbs.h
index 5583063b5e..ee21623dac 100644
--- a/libavcodec/cbs.h
+++ b/libavcodec/cbs.h
@@ -363,22 +363,13 @@ void ff_cbs_fragment_reset(CodedBitstreamFragment *frag);
  */
 void ff_cbs_fragment_free(CodedBitstreamFragment *frag);
 
-/**
- * Allocate a new internal content buffer of the given size in the unit.
- *
- * The content will be zeroed.
- */
-int ff_cbs_alloc_unit_content(CodedBitstreamUnit *unit,
-                              size_t size,
-                              void (*free)(void *opaque, uint8_t *content));
-
 /**
  * Allocate a new internal content buffer matching the type of the unit.
  *
  * The content will be zeroed.
  */
-int ff_cbs_alloc_unit_content2(CodedBitstreamContext *ctx,
-                               CodedBitstreamUnit *unit);
+int ff_cbs_alloc_unit_content(CodedBitstreamContext *ctx,
+                              CodedBitstreamUnit *unit);
 
 /**
  * Insert a new unit into a fragment with the given content.
diff --git a/libavcodec/cbs_av1.c b/libavcodec/cbs_av1.c
index 1229480567..154d9156cf 100644
--- a/libavcodec/cbs_av1.c
+++ b/libavcodec/cbs_av1.c
@@ -878,7 +878,7 @@ static int cbs_av1_read_unit(CodedBitstreamContext *ctx,
     GetBitContext gbc;
     int err, start_pos, end_pos;
 
-    err = ff_cbs_alloc_unit_content2(ctx, unit);
+    err = ff_cbs_alloc_unit_content(ctx, unit);
     if (err < 0)
         return err;
     obu = unit->content;
diff --git a/libavcodec/cbs_h2645.c b/libavcodec/cbs_h2645.c
index 117b609dc3..e0c617e81d 100644
--- a/libavcodec/cbs_h2645.c
+++ b/libavcodec/cbs_h2645.c
@@ -702,7 +702,7 @@ static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
     if (err < 0)
         return err;
 
-    err = ff_cbs_alloc_unit_content2(ctx, unit);
+    err = ff_cbs_alloc_unit_content(ctx, unit);
     if (err < 0)
         return err;
 
@@ -821,7 +821,7 @@ static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
     if (err < 0)
         return err;
 
-    err = ff_cbs_alloc_unit_content2(ctx, unit);
+    err = ff_cbs_alloc_unit_content(ctx, unit);
     if (err < 0)
         return err;
 
diff --git a/libavcodec/cbs_jpeg.c b/libavcodec/cbs_jpeg.c
index 2afeecfa79..5921d624a1 100644
--- a/libavcodec/cbs_jpeg.c
+++ b/libavcodec/cbs_jpeg.c
@@ -227,7 +227,7 @@ static int cbs_jpeg_read_unit(CodedBitstreamContext *ctx,
     if (err < 0)
         return err;
 
-    err = ff_cbs_alloc_unit_content2(ctx, unit);
+    err = ff_cbs_alloc_unit_content(ctx, unit);
     if (err < 0)
         return err;
 
diff --git a/libavcodec/cbs_mpeg2.c b/libavcodec/cbs_mpeg2.c
index 1c9519cdaf..04b0c7f87d 100644
--- a/libavcodec/cbs_mpeg2.c
+++ b/libavcodec/cbs_mpeg2.c
@@ -204,7 +204,7 @@ static int cbs_mpeg2_read_unit(CodedBitstreamContext *ctx,
     if (err < 0)
         return err;
 
-    err = ff_cbs_alloc_unit_content2(ctx, unit);
+    err = ff_cbs_alloc_unit_content(ctx, unit);
     if (err < 0)
         return err;
 
diff --git a/libavcodec/cbs_sei.c b/libavcodec/cbs_sei.c
index 141e97ec58..50a513f592 100644
--- a/libavcodec/cbs_sei.c
+++ b/libavcodec/cbs_sei.c
@@ -179,7 +179,7 @@ static int cbs_sei_get_unit(CodedBitstreamContext *ctx,
     unit = &au->units[position];
     unit->type = sei_type;
 
-    err = ff_cbs_alloc_unit_content2(ctx, unit);
+    err = ff_cbs_alloc_unit_content(ctx, unit);
     if (err < 0)
         return err;
 
diff --git a/libavcodec/cbs_vp9.c b/libavcodec/cbs_vp9.c
index ae7f88a8a3..184fdcade6 100644
--- a/libavcodec/cbs_vp9.c
+++ b/libavcodec/cbs_vp9.c
@@ -489,7 +489,7 @@ static int cbs_vp9_read_unit(CodedBitstreamContext *ctx,
     if (err < 0)
         return err;
 
-    err = ff_cbs_alloc_unit_content2(ctx, unit);
+    err = ff_cbs_alloc_unit_content(ctx, unit);
     if (err < 0)
         return err;
     frame = unit->content;