cbs_h265: read/write HEVC PREFIX SEI

Similar to H264, cbs_h265_{read, write}_nal_unit() can handle HEVC
prefix SEI NAL units. Currently mastering display colour volume SEI
message is added only, we may add more SEI message if needed later

Signed-off-by: Haihao Xiang <haihao.xiang@intel.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/libavcodec/cbs_h2645.c b/libavcodec/cbs_h2645.c
index 1ce42c6950..dd13d8ab5f 100644
--- a/libavcodec/cbs_h2645.c
+++ b/libavcodec/cbs_h2645.c
@@ -29,6 +29,7 @@
 #include "h264_sei.h"
 #include "h2645_parse.h"
 #include "hevc.h"
+#include "hevc_sei.h"
 
 
 static int cbs_read_ue_golomb(CodedBitstreamContext *ctx, GetBitContext *gbc,
@@ -483,6 +484,26 @@ static void cbs_h265_free_slice(void *unit, uint8_t *content)
     av_freep(&content);
 }
 
+static void cbs_h265_free_sei_payload(H265RawSEIPayload *payload)
+{
+    switch (payload->payload_type) {
+    case HEVC_SEI_TYPE_MASTERING_DISPLAY_INFO:
+        break;
+    default:
+        av_buffer_unref(&payload->payload.other.data_ref);
+        break;
+    }
+}
+
+static void cbs_h265_free_sei(void *unit, uint8_t *content)
+{
+    H265RawSEI *sei = (H265RawSEI*)content;
+    int i;
+    for (i = 0; i < sei->payload_count; i++)
+        cbs_h265_free_sei_payload(&sei->payload[i]);
+    av_freep(&content);
+}
+
 static int cbs_h2645_fragment_add_nals(CodedBitstreamContext *ctx,
                                        CodedBitstreamFragment *frag,
                                        const H2645Packet *packet)
@@ -986,6 +1007,21 @@ static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
         }
         break;
 
+    case HEVC_NAL_SEI_PREFIX:
+        {
+            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H265RawSEI),
+                                            &cbs_h265_free_sei);
+
+            if (err < 0)
+                return err;
+
+            err = cbs_h265_read_sei(ctx, &gbc, unit->content);
+
+            if (err < 0)
+                return err;
+        }
+        break;
+
     default:
         return AVERROR(ENOSYS);
     }
@@ -1226,6 +1262,15 @@ static int cbs_h265_write_nal_unit(CodedBitstreamContext *ctx,
         }
         break;
 
+    case HEVC_NAL_SEI_PREFIX:
+        {
+            err = cbs_h265_write_sei(ctx, pbc, unit->content);
+
+            if (err < 0)
+                return err;
+        }
+        break;
+
     default:
         av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
                "NAL unit type %"PRIu32".\n", unit->type);