avcodec/libvpxenc: Copy Smpte2094App5 metadata

If incoming packets contain Smpte2094App5 metadata, retain them
so that they are passed through to the output.

Signed-off-by: Vignesh Venkat <vigneshv@google.com>

Changelog

@@ -9,6 +9,7 @@ version <next>:
 - HE-AAC 960 decoding (DAB+)
 - transpose_cuda filter
 - Add AMF Frame Rate Converter (vf_frc_amf) filter
+- SMPTE 2094-50 metadata support and passthrough
 
 
 version 8.1:

libavcodec/libvpxenc.c

@@ -74,6 +74,7 @@ typedef struct FrameData {
     AVBufferRef *frame_opaque_ref;
 
     AVBufferRef *hdr10_plus;
+    AVBufferRef *hdr_smpte2094_app5;
 } FrameData;
 
 typedef struct VPxEncoderContext {
@@ -341,6 +342,7 @@ static void frame_data_uninit(FrameData *fd)
 {
     av_buffer_unref(&fd->frame_opaque_ref);
     av_buffer_unref(&fd->hdr10_plus);
+    av_buffer_unref(&fd->hdr_smpte2094_app5);
 }
 
 static av_cold void fifo_free(AVFifo **fifo)
@@ -366,12 +368,13 @@ static int frame_data_submit(AVCodecContext *avctx, AVFifo *fifo,
 
     FrameData fd = { .pts = frame->pts };
     int ret;
+    const AVFrameSideData *sd;
 
     if (IS_VP9(avctx) &&
         // Keep HDR10+ if it has bit depth higher than 8 and
         // it has PQ trc (SMPTE2084).
         enccfg->g_bit_depth > 8 && avctx->color_trc == AVCOL_TRC_SMPTE2084) {
-        const AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_DYNAMIC_HDR_PLUS);
+        sd = av_frame_get_side_data(frame, AV_FRAME_DATA_DYNAMIC_HDR_PLUS);
 
         if (sd) {
             fd.hdr10_plus = av_buffer_ref(sd->buf);
@@ -380,6 +383,14 @@ static int frame_data_submit(AVCodecContext *avctx, AVFifo *fifo,
         }
     }
 
+    // Keep SMPTE2094_APP5 metadata.
+    sd = av_frame_get_side_data(frame, AV_FRAME_DATA_DYNAMIC_HDR_SMPTE_2094_APP5);
+    if (sd) {
+        fd.hdr_smpte2094_app5 = av_buffer_ref(sd->buf);
+        if (!fd.hdr_smpte2094_app5)
+            return AVERROR(ENOMEM);
+    }
+
     fd.duration     = frame->duration;
     fd.frame_opaque = frame->opaque;
     if (avctx->flags & AV_CODEC_FLAG_COPY_OPAQUE && frame->opaque_ref) {
@@ -454,6 +465,16 @@ static int frame_data_apply(AVCodecContext *avctx, AVFifo *fifo, AVPacket *pkt)
         memcpy(data, fd.hdr10_plus->data, fd.hdr10_plus->size);
     }
 
+    if (fd.hdr_smpte2094_app5) {
+        data = av_packet_new_side_data(pkt, AV_PKT_DATA_DYNAMIC_HDR_SMPTE_2094_APP5, fd.hdr_smpte2094_app5->size);
+        if (!data) {
+            ret = AVERROR(ENOMEM);
+            goto skip;
+        }
+
+        memcpy(data, fd.hdr_smpte2094_app5->data, fd.hdr_smpte2094_app5->size);
+    }
+
 skip:
     av_fifo_drain2(fifo, 1);
     frame_data_uninit(&fd);

libavcodec/version.h

@@ -29,7 +29,7 @@
 
 #include "version_major.h"
 
-#define LIBAVCODEC_VERSION_MINOR  30
+#define LIBAVCODEC_VERSION_MINOR  31
 #define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \