avcodec/nvenc: add single slice intra refresh support

Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>

libavcodec/nvenc.c

@@ -529,8 +529,21 @@ static int nvenc_check_capabilities(AVCodecContext *avctx)
     }
 #endif
 
+#ifdef NVENC_HAVE_SINGLE_SLICE_INTRA_REFRESH
+    ret = nvenc_check_cap(avctx, NV_ENC_CAPS_SINGLE_SLICE_INTRA_REFRESH);
+    if(ctx->single_slice_intra_refresh && ret <= 0) {
+        av_log(avctx, AV_LOG_WARNING, "Single slice intra refresh not supported by the device\n");
+        return AVERROR(ENOSYS);
+    }
+#else
+    if(ctx->single_slice_intra_refresh) {
+        av_log(avctx, AV_LOG_WARNING, "Single slice intra refresh needs SDK 11.1 at build time\n");
+        return AVERROR(ENOSYS);
+    }
+#endif
+
     ret = nvenc_check_cap(avctx, NV_ENC_CAPS_SUPPORT_INTRA_REFRESH);
-    if(ctx->intra_refresh && ret <= 0) {
+    if((ctx->intra_refresh || ctx->single_slice_intra_refresh) && ret <= 0) {
         av_log(avctx, AV_LOG_WARNING, "Intra refresh not supported by the device\n");
         return AVERROR(ENOSYS);
     }
@@ -1086,6 +1099,9 @@ static av_cold int nvenc_setup_h264_config(AVCodecContext *avctx)
         h264->enableIntraRefresh = 1;
         h264->intraRefreshPeriod = avctx->gop_size;
         h264->intraRefreshCnt = avctx->gop_size - 1;
+#ifdef NVENC_HAVE_SINGLE_SLICE_INTRA_REFRESH
+        h264->singleSliceIntraRefresh = ctx->single_slice_intra_refresh;
+#endif
     }
 
     h264->disableSPSPPS = (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) ? 1 : 0;
@@ -1192,6 +1208,9 @@ static av_cold int nvenc_setup_hevc_config(AVCodecContext *avctx)
         hevc->enableIntraRefresh = 1;
         hevc->intraRefreshPeriod = avctx->gop_size;
         hevc->intraRefreshCnt = avctx->gop_size - 1;
+#ifdef NVENC_HAVE_SINGLE_SLICE_INTRA_REFRESH
+        hevc->singleSliceIntraRefresh = ctx->single_slice_intra_refresh;
+#endif
     }
 
     hevc->disableSPSPPS = (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) ? 1 : 0;
@@ -1391,6 +1410,10 @@ static av_cold int nvenc_setup_encoder(AVCodecContext *avctx)
         ctx->encode_config.gopLength = 1;
     }
 
+    /* force to enable intra refresh */
+    if(ctx->single_slice_intra_refresh)
+        ctx->intra_refresh = 1;
+
     if (ctx->intra_refresh)
         ctx->encode_config.gopLength = NVENC_INFINITE_GOPLENGTH;
 

libavcodec/nvenc.h

@@ -73,6 +73,7 @@ typedef void ID3D11Device;
 // SDK 11.1 compile time feature checks
 #if NVENCAPI_CHECK_VERSION(11, 1)
 #define NVENC_HAVE_QP_CHROMA_OFFSETS
+#define NVENC_HAVE_SINGLE_SLICE_INTRA_REFRESH
 #endif
 
 typedef struct NvencSurface
@@ -231,6 +232,7 @@ typedef struct NvencContext
     int ldkfs;
     int extra_sei;
     int intra_refresh;
+    int single_slice_intra_refresh;
 } NvencContext;
 
 int ff_nvenc_encode_init(AVCodecContext *avctx);

libavcodec/nvenc_h264.c

@@ -190,6 +190,8 @@ static const AVOption options[] = {
                                                             OFFSET(extra_sei),    AV_OPT_TYPE_BOOL,  { .i64 = 1 }, 0, 1, VE },
     { "intra-refresh","Use Periodic Intra Refresh instead of IDR frames",
                                                             OFFSET(intra_refresh),AV_OPT_TYPE_BOOL,  { .i64 = 0 }, 0, 1, VE },
+    { "single-slice-intra-refresh", "Use single slice intra refresh",
+                                                            OFFSET(single_slice_intra_refresh), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
     { NULL }
 };
 

libavcodec/nvenc_hevc.c

@@ -171,6 +171,8 @@ static const AVOption options[] = {
                                                             OFFSET(extra_sei),    AV_OPT_TYPE_BOOL,  { .i64 = 1 }, 0, 1, VE },
     { "intra-refresh","Use Periodic Intra Refresh instead of IDR frames",
                                                             OFFSET(intra_refresh),AV_OPT_TYPE_BOOL,  { .i64 = 0 }, 0, 1, VE },
+    { "single-slice-intra-refresh", "Use single slice intra refresh",
+                                                            OFFSET(single_slice_intra_refresh), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
     { NULL }
 };