1 files changed, 63 insertions, 0 deletions
diff --git a/src/utils/dolbyvision.c b/src/utils/dolbyvision.c
new file mode 100644
index 0000000..3798532
--- /dev/null
+++ b/src/utils/dolbyvision.c
@@ -0,0 +1,63 @@
+/*
+ * This file is part of libplacebo.
+ *
+ * libplacebo is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * libplacebo is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with libplacebo. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "common.h"
+#include <libplacebo/utils/dolbyvision.h>
+
+#ifdef PL_HAVE_LIBDOVI
+#include <libplacebo/tone_mapping.h>
+#include <libdovi/rpu_parser.h>
+#endif
+
+void pl_hdr_metadata_from_dovi_rpu(struct pl_hdr_metadata *out,
+                                   const uint8_t *buf, size_t size)
+{
+#ifdef PL_HAVE_LIBDOVI
+    if (buf && size) {
+        DoviRpuOpaque *rpu =
+            dovi_parse_unspec62_nalu(buf, size);
+        const DoviRpuDataHeader *header = dovi_rpu_get_header(rpu);
+
+        if (header && header->vdr_dm_metadata_present_flag) {
+            // Profile 4 reshaping isn't done as it is a dual layer format.
+            // However there are still unknowns on its EOTF, so it cannot be enabled.
+            //
+            // For profile 7, the brightness metadata can still be used as most
+            // titles are going to have accurate metadata<->image brightness,
+            // with the exception of some titles that require the enhancement layer
+            // to be processed to restore the intended brightness, which would then
+            // match the metadata values.
+            if (header->guessed_profile == 4) {
+                goto done;
+            }
+
+            const DoviVdrDmData *vdr_dm_data = dovi_rpu_get_vdr_dm_data(rpu);
+            if (vdr_dm_data->dm_data.level1) {
+                const DoviExtMetadataBlockLevel1 *l1 = vdr_dm_data->dm_data.level1;
+                out->max_pq_y = l1->max_pq / 4095.0f;
+                out->avg_pq_y = l1->avg_pq / 4095.0f;
+            }
+
+            dovi_rpu_free_vdr_dm_data(vdr_dm_data);
+        }
+
+    done:
+        dovi_rpu_free_header(header);
+        dovi_rpu_free(rpu);
+    }
+#endif
+}