vo_gpu_next: parse Dolby Vision metadata for dynamic scene brightness

Improves playback for Dolby Vision video files as the metadata can be
used instead of requiring `hdr-compute-peak=yes`.

video/out/placebo/utils.c

@@ -1,6 +1,10 @@
 #include "common/common.h"
 #include "utils.h"
 
+#if PL_API_VER >= 251
+#include <libplacebo/utils/dolbyvision.h>
+#endif
+
 static const int pl_log_to_msg_lev[PL_LOG_ALL+1] = {
     [PL_LOG_FATAL] = MSGL_FATAL,
     [PL_LOG_ERR]   = MSGL_ERR,
@@ -165,3 +169,41 @@ enum pl_chroma_location mp_chroma_to_pl(enum mp_chroma_location chroma)
 
     MP_ASSERT_UNREACHABLE();
 }
+
+void mp_map_dovi_metadata_to_pl(struct mp_image *mpi,
+                                struct pl_frame *frame)
+{
+#ifdef PL_HAVE_LAV_DOLBY_VISION
+    if (mpi->dovi) {
+        const AVDOVIMetadata *metadata = (AVDOVIMetadata *) mpi->dovi->data;
+        const AVDOVIRpuDataHeader *header = av_dovi_get_header(metadata);
+
+        if (header->disable_residual_flag) {
+            // Only automatically map DoVi RPUs that don't require an EL
+            struct pl_dovi_metadata *dovi = talloc_ptrtype(mpi, dovi);
+
+#if PL_API_VER >= 250
+            pl_frame_map_avdovi_metadata(frame, dovi, metadata);
+#else // back-compat fallback for older libplacebo
+            const AVDOVIColorMetadata *color = av_dovi_get_color(metadata);
+            pl_map_dovi_metadata(dovi, metadata);
+            frame->repr.dovi = dovi;
+            frame->repr.sys = PL_COLOR_SYSTEM_DOLBYVISION;
+            frame->color.primaries = PL_COLOR_PRIM_BT_2020;
+            frame->color.transfer = PL_COLOR_TRC_PQ;
+            frame->color.hdr.min_luma =
+                pl_hdr_rescale(PL_HDR_PQ, PL_HDR_NITS, color->source_min_pq / 4095.0f);
+            frame->color.hdr.max_luma =
+                pl_hdr_rescale(PL_HDR_PQ, PL_HDR_NITS, color->source_max_pq / 4095.0f);
+#endif
+        }
+    }
+
+#if PL_API_VER >= 251 && defined(PL_HAVE_LIBDOVI)
+    if (mpi->dovi_buf)
+        pl_hdr_metadata_from_dovi_rpu(&frame->color.hdr, mpi->dovi_buf->data,
+                                      mpi->dovi_buf->size);
+#endif
+
+#endif // PL_HAVE_LAV_DOLBY_VISION
+}

video/out/placebo/utils.h

@@ -1,12 +1,18 @@
 #pragma once
 
+#include "config.h"
 #include "common/common.h"
 #include "common/msg.h"
 #include "video/csputils.h"
+#include "video/mp_image.h"
+
+#include <libavutil/buffer.h>
 
 #include <libplacebo/common.h>
 #include <libplacebo/log.h>
 #include <libplacebo/colorspace.h>
+#include <libplacebo/renderer.h>
+#include <libplacebo/utils/libav.h>
 
 pl_log mppl_log_create(void *tactx, struct mp_log *log);
 void mppl_log_set_probing(pl_log log, bool probing);
@@ -27,3 +33,6 @@ enum pl_color_system mp_csp_to_pl(enum mp_csp csp);
 enum pl_color_levels mp_levels_to_pl(enum mp_csp_levels levels);
 enum pl_alpha_mode mp_alpha_to_pl(enum mp_alpha_type alpha);
 enum pl_chroma_location mp_chroma_to_pl(enum mp_chroma_location chroma);
+
+void mp_map_dovi_metadata_to_pl(struct mp_image *mpi,
+                                struct pl_frame *frame);

video/out/vo_gpu_next.c

@@ -699,22 +699,8 @@ static bool map_frame(pl_gpu gpu, pl_tex *tex, const struct pl_source_frame *src
     // Update chroma location, must be done after initializing planes
     pl_frame_set_chroma_location(frame, mp_chroma_to_pl(par->chroma_location));
 
-#ifdef PL_HAVE_LAV_DOLBY_VISION
+    // Set the frame DOVI metadata
-    if (mpi->dovi) {
+    mp_map_dovi_metadata_to_pl(mpi, frame);
-        const AVDOVIMetadata *metadata = (AVDOVIMetadata *) mpi->dovi->data;
-        struct pl_dovi_metadata *dovi = talloc_ptrtype(mpi, dovi);
-        const AVDOVIColorMetadata *color = av_dovi_get_color(metadata);
-        pl_map_dovi_metadata(dovi, metadata);
-        frame->repr.dovi = dovi;
-        frame->repr.sys = PL_COLOR_SYSTEM_DOLBYVISION;
-        frame->color.primaries = PL_COLOR_PRIM_BT_2020;
-        frame->color.transfer = PL_COLOR_TRC_PQ;
-        frame->color.hdr.min_luma =
-            pl_hdr_rescale(PL_HDR_PQ, PL_HDR_NITS, color->source_min_pq / 4095.0f);
-        frame->color.hdr.max_luma =
-            pl_hdr_rescale(PL_HDR_PQ, PL_HDR_NITS, color->source_max_pq / 4095.0f);
-    }
-#endif
 
 #ifdef PL_HAVE_LAV_FILM_GRAIN
     if (mpi->film_grain)