[FFmpeg-devel] [PATCH 1/3] libavcodec/h2645_sei: export raw LCEVC metadata

[James Almer <jamrial@gmail.com>]

Signed-off-by: James Almer <jamrial@gmail.com>
---
 libavcodec/h2645_sei.c | 36 ++++++++++++++++++++++++++++++++++++
 libavcodec/h2645_sei.h |  5 +++++
 libavcodec/itut35.h    |  2 ++
 libavutil/frame.c      |  1 +
 libavutil/frame.h      |  5 +++++
 5 files changed, 49 insertions(+)

diff --git a/libavcodec/h2645_sei.c b/libavcodec/h2645_sei.c
index e8eb15524f..a6e71894ff 100644
--- a/libavcodec/h2645_sei.c
+++ b/libavcodec/h2645_sei.c
@@ -99,6 +99,20 @@ static int decode_registered_user_data_dynamic_hdr_vivid(HEVCSEIDynamicHDRVivid
 }
 #endif
 
+static int decode_registered_user_data_lcevc(HEVCSEILCEVC *s,
+                                             GetByteContext *gb)
+{
+    int size = bytestream2_get_bytes_left(gb);
+
+    av_buffer_unref(&s->info);
+    s->info = av_buffer_alloc(size);
+    if (!s->info)
+        return AVERROR(ENOMEM);
+
+    bytestream2_get_bufferu(gb, s->info->data, size);
+    return 0;
+}
+
 static int decode_registered_user_data_afd(H2645SEIAFD *h, GetByteContext *gb)
 {
     int flag;
@@ -142,6 +156,7 @@ static int decode_registered_user_data(H2645SEI *h, GetByteContext *gb,
     }
 
     if (country_code != ITU_T_T35_COUNTRY_CODE_US &&
+        country_code != ITU_T_T35_COUNTRY_CODE_UK &&
         country_code != ITU_T_T35_COUNTRY_CODE_CN) {
         av_log(logctx, AV_LOG_VERBOSE,
                "Unsupported User Data Registered ITU-T T35 SEI message (country_code = %d)\n",
@@ -173,6 +188,13 @@ static int decode_registered_user_data(H2645SEI *h, GetByteContext *gb,
         }
         break;
     }
+    case ITU_T_T35_PROVIDER_CODE_LCEVC: {
+        if (bytestream2_get_bytes_left(gb) < 2)
+            return AVERROR_INVALIDDATA;
+
+        bytestream2_skipu(gb, 1); // user_data_type_code
+        return decode_registered_user_data_lcevc(&h->lcevc, gb);
+    }
 #if CONFIG_HEVC_SEI
     case ITU_T_T35_PROVIDER_CODE_CUVA: {
         const uint16_t cuva_provider_oriented_code = 0x0005;
@@ -483,6 +505,11 @@ int ff_h2645_sei_ctx_replace(H2645SEI *dst, const H2645SEI *src)
         av_buffer_unref(&dst->unregistered.buf_ref[i]);
     dst->unregistered.nb_buf_ref = 0;
 
+    ret = av_buffer_replace(&dst->lcevc.info,
+                             src->lcevc.info);
+    if (ret < 0)
+        return ret;
+
     if (src->unregistered.nb_buf_ref) {
         ret = av_reallocp_array(&dst->unregistered.buf_ref,
                                 src->unregistered.nb_buf_ref,
@@ -773,6 +800,14 @@ int ff_h2645_sei_to_frame(AVFrame *frame, H2645SEI *sei,
         }
     }
 
+    if (sei->lcevc.info) {
+        HEVCSEILCEVC *lcevc = &sei->lcevc;
+        AVFrameSideData *sd = av_frame_new_side_data_from_buf(frame, AV_FRAME_DATA_LCEVC, lcevc->info);
+        if (!sd)
+            av_buffer_unref(&lcevc->info);
+        lcevc->info = NULL;
+    }
+
     return 0;
 }
 
@@ -786,6 +821,7 @@ void ff_h2645_sei_reset(H2645SEI *s)
     av_freep(&s->unregistered.buf_ref);
     av_buffer_unref(&s->dynamic_hdr_plus.info);
     av_buffer_unref(&s->dynamic_hdr_vivid.info);
+    av_buffer_unref(&s->lcevc.info);
 
     s->ambient_viewing_environment.present = 0;
     s->mastering_display.present = 0;
diff --git a/libavcodec/h2645_sei.h b/libavcodec/h2645_sei.h
index 0ebf48011a..70d7c2277c 100644
--- a/libavcodec/h2645_sei.h
+++ b/libavcodec/h2645_sei.h
@@ -48,6 +48,10 @@ typedef struct HEVCSEIDynamicHDRVivid {
     AVBufferRef *info;
 } HEVCSEIDynamicHDRVivid;
 
+typedef struct HEVCSEILCEVC {
+    AVBufferRef *info;
+} HEVCSEILCEVC;
+
 typedef struct H2645SEIUnregistered {
     AVBufferRef **buf_ref;
     unsigned nb_buf_ref;
@@ -124,6 +128,7 @@ typedef struct H2645SEI {
     H2645SEIAFD afd;
     HEVCSEIDynamicHDRPlus  dynamic_hdr_plus;     //< HEVC only
     HEVCSEIDynamicHDRVivid dynamic_hdr_vivid;    //< HEVC only
+    HEVCSEILCEVC lcevc;
     H2645SEIUnregistered unregistered;
     H2645SEIFramePacking frame_packing;
     H2645SEIDisplayOrientation display_orientation;
diff --git a/libavcodec/itut35.h b/libavcodec/itut35.h
index ffa7024981..a75ef37929 100644
--- a/libavcodec/itut35.h
+++ b/libavcodec/itut35.h
@@ -20,11 +20,13 @@
 #define AVCODEC_ITUT35_H
 
 #define ITU_T_T35_COUNTRY_CODE_CN 0x26
+#define ITU_T_T35_COUNTRY_CODE_UK 0xB4
 #define ITU_T_T35_COUNTRY_CODE_US 0xB5
 
 #define ITU_T_T35_PROVIDER_CODE_ATSC  0x31
 #define ITU_T_T35_PROVIDER_CODE_CUVA  0x04
 #define ITU_T_T35_PROVIDER_CODE_DOLBY 0x3B
+#define ITU_T_T35_PROVIDER_CODE_LCEVC 0x50
 #define ITU_T_T35_PROVIDER_CODE_SMTPE 0x3C
 
 #endif /* AVCODEC_ITUT35_H */
diff --git a/libavutil/frame.c b/libavutil/frame.c
index 079cf6595b..f872b1c67d 100644
--- a/libavutil/frame.c
+++ b/libavutil/frame.c
@@ -822,6 +822,7 @@ const char *av_frame_side_data_name(enum AVFrameSideDataType type)
     case AV_FRAME_DATA_DOVI_RPU_BUFFER:             return "Dolby Vision RPU Data";
     case AV_FRAME_DATA_DOVI_METADATA:               return "Dolby Vision Metadata";
     case AV_FRAME_DATA_AMBIENT_VIEWING_ENVIRONMENT: return "Ambient viewing environment";
+    case AV_FRAME_DATA_LCEVC:                       return "Raw LCEVC metadata";
     }
     return NULL;
 }
diff --git a/libavutil/frame.h b/libavutil/frame.h
index b94687941d..8959922f85 100644
--- a/libavutil/frame.h
+++ b/libavutil/frame.h
@@ -224,6 +224,11 @@ enum AVFrameSideDataType {
      * encoding.
      */
     AV_FRAME_DATA_VIDEO_HINT,
+
+    /**
+     * Raw LCEVC payload data, as a uint8_t array.
+     */
+    AV_FRAME_DATA_LCEVC,
 };
 
 enum AVActiveFormatDescription {
-- 
2.44.0

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