avcodec/dovi_rpu: split into dovi_rpu.c and dovi_rpudec.c

To allow compiling the decoding objects without the encoding objects and
vice versa. Common helpers that users of both APIs need are put into the
shared dovi_rpu.c.

libavcodec/Makefile

@@ -86,7 +86,7 @@ OBJS-$(CONFIG_CBS_MPEG2)               += cbs_mpeg2.o
 OBJS-$(CONFIG_CBS_VP8)                 += cbs_vp8.o vp8data.o
 OBJS-$(CONFIG_CBS_VP9)                 += cbs_vp9.o
 OBJS-$(CONFIG_DEFLATE_WRAPPER)         += zlib_wrapper.o
-OBJS-$(CONFIG_DOVI_RPUDEC)             += dovi_rpu.o
+OBJS-$(CONFIG_DOVI_RPUDEC)             += dovi_rpu.o dovi_rpudec.o
 OBJS-$(CONFIG_ERROR_RESILIENCE)        += error_resilience.o
 OBJS-$(CONFIG_EVCPARSE)                += evc_parse.o evc_ps.o
 OBJS-$(CONFIG_EXIF)                    += exif.o tiff_common.o

libavcodec/dovi_rpu.h

@@ -100,6 +100,20 @@ int ff_dovi_rpu_parse(DOVIContext *s, const uint8_t *rpu, size_t rpu_size,
  */
 int ff_dovi_attach_side_data(DOVIContext *s, AVFrame *frame);
 
+/***************************************************
+ * The following section is for internal use only. *
+ ***************************************************/
+
+typedef struct DOVIVdr {
+    AVDOVIDataMapping mapping;
+    AVDOVIColorMetadata color;
+} DOVIVdr;
+
+enum {
+    RPU_COEFF_FIXED = 0,
+    RPU_COEFF_FLOAT = 1,
+};
+
 /**
  * Internal helper function to guess the correct DV profile for HEVC.
  *