avcodec/nvenc: add A53CC support

Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>

libavcodec/nvenc.c

@@ -1719,7 +1719,8 @@ static int nvenc_upload_frame(AVCodecContext *avctx, const AVFrame *frame,
 }
 
 static void nvenc_codec_specific_pic_params(AVCodecContext *avctx,
-                                            NV_ENC_PIC_PARAMS *params)
+                                            NV_ENC_PIC_PARAMS *params,
+                                            NV_ENC_SEI_PAYLOAD *sei_data)
 {
     NvencContext *ctx = avctx->priv_data;
 
@@ -1729,12 +1730,22 @@ static void nvenc_codec_specific_pic_params(AVCodecContext *avctx,
             ctx->encode_config.encodeCodecConfig.h264Config.sliceMode;
         params->codecPicParams.h264PicParams.sliceModeData =
             ctx->encode_config.encodeCodecConfig.h264Config.sliceModeData;
+        if (sei_data) {
+            params->codecPicParams.h264PicParams.seiPayloadArray = sei_data;
+            params->codecPicParams.h264PicParams.seiPayloadArrayCnt = 1;
+        }
+
       break;
     case AV_CODEC_ID_HEVC:
         params->codecPicParams.hevcPicParams.sliceMode =
             ctx->encode_config.encodeCodecConfig.hevcConfig.sliceMode;
         params->codecPicParams.hevcPicParams.sliceModeData =
             ctx->encode_config.encodeCodecConfig.hevcConfig.sliceModeData;
+        if (sei_data) {
+            params->codecPicParams.hevcPicParams.seiPayloadArray = sei_data;
+            params->codecPicParams.hevcPicParams.seiPayloadArrayCnt = 1;
+        }
+
         break;
     }
 }
@@ -2036,6 +2047,8 @@ int ff_nvenc_send_frame(AVCodecContext *avctx, const AVFrame *frame)
     NVENCSTATUS nv_status;
     NvencSurface *tmp_out_surf, *in_surf;
     int res, res2;
+    NV_ENC_SEI_PAYLOAD *sei_data = NULL;
+    size_t sei_size;
 
     NvencContext *ctx = avctx->priv_data;
     NvencDynLoadFunctions *dl_fn = &ctx->nvenc_dload_funcs;
@@ -2095,7 +2108,19 @@ int ff_nvenc_send_frame(AVCodecContext *avctx, const AVFrame *frame)
 
         pic_params.inputTimeStamp = frame->pts;
 
-        nvenc_codec_specific_pic_params(avctx, &pic_params);
+        if (av_frame_get_side_data(frame, AV_FRAME_DATA_A53_CC)) {
+            if (ff_alloc_a53_sei(frame, sizeof(NV_ENC_SEI_PAYLOAD), (void**)&sei_data, &sei_size) < 0) {
+                av_log(ctx, AV_LOG_ERROR, "Not enough memory for closed captions, skipping\n");
+            }
+
+            if (sei_data) {
+                sei_data->payloadSize = (uint32_t)sei_size;
+                sei_data->payloadType = 4;
+                sei_data->payload = (uint8_t*)(sei_data + 1);
+            }
+        }
+
+        nvenc_codec_specific_pic_params(avctx, &pic_params, sei_data);
     } else {
         pic_params.encodePicFlags = NV_ENC_PIC_FLAG_EOS;
         ctx->encoder_flushing = 1;
@@ -2106,6 +2131,7 @@ int ff_nvenc_send_frame(AVCodecContext *avctx, const AVFrame *frame)
         return res;
 
     nv_status = p_nvenc->nvEncEncodePicture(ctx->nvencoder, &pic_params);
+    av_free(sei_data);
 
     res = nvenc_pop_context(avctx);
     if (res < 0)