[FFmpeg-devel] [PATCH] avcodec/dovi - disable metadata compression by default

[Cosmin Stejerean via ffmpeg-devel <ffmpeg-devel@ffmpeg.org>]

From: Cosmin Stejerean <cosmin@cosmin.at>

not all clients support metadata compression, make this an option and off by
default until we can verify output.

vdr_dm_metadata_changed = 0 case fails the DV verifier so force this to true
for now until we can determine the correct output format for this case.


---
 libavcodec/dovi_rpu.h    | 5 +++++
 libavcodec/dovi_rpuenc.c | 8 ++++++--
 libavcodec/libaomenc.c   | 1 +
 libavcodec/libsvtav1.c   | 1 +
 libavcodec/libx265.c     | 1 +
 5 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/libavcodec/dovi_rpu.h b/libavcodec/dovi_rpu.h
index 8ce0c88e9d..fca30804ae 100644
--- a/libavcodec/dovi_rpu.h
+++ b/libavcodec/dovi_rpu.h
@@ -71,6 +71,11 @@ typedef struct DOVIContext {
     AVDOVIDmData *ext_blocks;
     int num_ext_blocks;
 
+    /**
+     * Enable metadata compression in the output. Currently this is experimental.
+     */
+    int enable_compression;
+
     /**
      * Private fields internal to dovi_rpu.c
      */
diff --git a/libavcodec/dovi_rpuenc.c b/libavcodec/dovi_rpuenc.c
index 3c3e0f84c0..26ed25733a 100644
--- a/libavcodec/dovi_rpuenc.c
+++ b/libavcodec/dovi_rpuenc.c
@@ -512,8 +512,12 @@ int ff_dovi_rpu_generate(DOVIContext *s, const AVDOVIMetadata *metadata,
         }
     }
 
-    vdr_dm_metadata_changed = !s->color || memcmp(s->color, color, sizeof(*color));
-    use_prev_vdr_rpu = !memcmp(&s->vdr[vdr_rpu_id]->mapping, mapping, sizeof(*mapping));
+    // the output when vdr_dm_metadata_changed is 0 fails the DV verifier
+    // force it to 1 until we can get some samples or documentation on correct syntax
+    vdr_dm_metadata_changed = 1; // !s->color || memcmp(s->color, color, sizeof(*color));
+
+    // not all clients support metadata compression
+    use_prev_vdr_rpu = s->enable_compression && !memcmp(&s->vdr[vdr_rpu_id]->mapping, mapping, sizeof(*mapping));
 
     buffer_size = 12 /* vdr seq info */ + 5 /* CRC32 + terminator */;
     buffer_size += num_ext_blocks_v1 * 13;
diff --git a/libavcodec/libaomenc.c b/libavcodec/libaomenc.c
index dec74ebecd..c6104f5522 100644
--- a/libavcodec/libaomenc.c
+++ b/libavcodec/libaomenc.c
@@ -1489,6 +1489,7 @@ static const AVOption options[] = {
     { "still-picture", "Encode in single frame mode (typically used for still AVIF images).", OFFSET(still_picture), AV_OPT_TYPE_BOOL, {.i64 = 0}, -1, 1, VE },
     { "dolbyvision",     "Enable Dolby Vision RPU coding", OFFSET(dovi.enable), AV_OPT_TYPE_BOOL, {.i64 = FF_DOVI_AUTOMATIC }, -1, 1, VE, .unit = "dovi" },
     {   "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_DOVI_AUTOMATIC}, .flags = VE, .unit = "dovi" },
+    { "dv_enable_compression", "Enable Dolby Vision metadata compression", OFFSET(dovi.enable_compression), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, VE },
     { "enable-rect-partitions", "Enable rectangular partitions", OFFSET(enable_rect_partitions), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, VE},
     { "enable-1to4-partitions", "Enable 1:4/4:1 partitions",     OFFSET(enable_1to4_partitions), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, VE},
     { "enable-ab-partitions",   "Enable ab shape partitions",    OFFSET(enable_ab_partitions),   AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, VE},
diff --git a/libavcodec/libsvtav1.c b/libavcodec/libsvtav1.c
index 2fef8c8971..86bb6686dd 100644
--- a/libavcodec/libsvtav1.c
+++ b/libavcodec/libsvtav1.c
@@ -733,6 +733,7 @@ static const AVOption options[] = {
 
     { "dolbyvision", "Enable Dolby Vision RPU coding", OFFSET(dovi.enable), AV_OPT_TYPE_BOOL, {.i64 = FF_DOVI_AUTOMATIC }, -1, 1, VE, .unit = "dovi" },
     {   "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_DOVI_AUTOMATIC}, .flags = VE, .unit = "dovi" },
+    { "dv_enable_compression", "Enable Dolby Vision metadata compression", OFFSET(dovi.enable_compression), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, VE },
 
     {NULL},
 };
diff --git a/libavcodec/libx265.c b/libavcodec/libx265.c
index ac1dbc4f97..2a79a5e6da 100644
--- a/libavcodec/libx265.c
+++ b/libavcodec/libx265.c
@@ -953,6 +953,7 @@ static const AVOption options[] = {
 #if X265_BUILD >= 167
     { "dolbyvision", "Enable Dolby Vision RPU coding", OFFSET(dovi.enable), AV_OPT_TYPE_BOOL, {.i64 = FF_DOVI_AUTOMATIC }, -1, 1, VE, .unit = "dovi" },
     {   "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_DOVI_AUTOMATIC}, .flags = VE, .unit = "dovi" },
+    { "dv_enable_compression", "Enable Dolby Vision metadata compression", OFFSET(dovi.enable_compression), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, VE },
 #endif
     { NULL }
 };
-- 
2.42.1


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