avcodec/nvenc: add constrainedFrame encoding support

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

libavcodec/nvenc.c

@@ -548,6 +548,19 @@ static int nvenc_check_capabilities(AVCodecContext *avctx)
         return AVERROR(ENOSYS);
     }
 
+#ifndef NVENC_HAVE_HEVC_CONSTRAINED_ENCODING
+    if (ctx->constrained_encoding && avctx->codec->id == AV_CODEC_ID_HEVC) {
+        av_log(avctx, AV_LOG_WARNING, "HEVC constrained encoding needs SDK 10.0 at build time\n");
+        return AVERROR(ENOSYS);
+    }
+#endif
+
+    ret = nvenc_check_cap(avctx, NV_ENC_CAPS_SUPPORT_CONSTRAINED_ENCODING);
+    if(ctx->constrained_encoding && ret <= 0) {
+        av_log(avctx, AV_LOG_WARNING, "Constrained encoding not supported by the device\n");
+        return AVERROR(ENOSYS);
+    }
+
     ctx->support_dyn_bitrate = nvenc_check_cap(avctx, NV_ENC_CAPS_SUPPORT_DYN_BITRATE_CHANGE);
 
     return 0;
@@ -1104,6 +1117,9 @@ static av_cold int nvenc_setup_h264_config(AVCodecContext *avctx)
 #endif
     }
 
+    if (ctx->constrained_encoding)
+        h264->enableConstrainedEncoding = 1;
+
     h264->disableSPSPPS = (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) ? 1 : 0;
     h264->repeatSPSPPS  = (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) ? 0 : 1;
     h264->outputAUD     = ctx->aud;
@@ -1213,6 +1229,11 @@ static av_cold int nvenc_setup_hevc_config(AVCodecContext *avctx)
 #endif
     }
 
+#ifdef NVENC_HAVE_HEVC_CONSTRAINED_ENCODING
+    if (ctx->constrained_encoding)
+        hevc->enableConstrainedEncoding = 1;
+#endif
+
     hevc->disableSPSPPS = (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) ? 1 : 0;
     hevc->repeatSPSPPS  = (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) ? 0 : 1;
     hevc->outputAUD     = ctx->aud;

libavcodec/nvenc.h

@@ -68,6 +68,7 @@ typedef void ID3D11Device;
 #define NVENC_HAVE_MULTIPASS
 #define NVENC_HAVE_LDKFS
 #define NVENC_HAVE_H264_LVL6
+#define NVENC_HAVE_HEVC_CONSTRAINED_ENCODING
 #endif
 
 // SDK 11.1 compile time feature checks
@@ -233,6 +234,7 @@ typedef struct NvencContext
     int extra_sei;
     int intra_refresh;
     int single_slice_intra_refresh;
+    int constrained_encoding;
 } NvencContext;
 
 int ff_nvenc_encode_init(AVCodecContext *avctx);

libavcodec/nvenc_h264.c

@@ -192,6 +192,8 @@ static const AVOption options[] = {
                                                             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 },
+    { "constrained-encoding", "Enable constrainedFrame encoding where each slice in the constrained picture is independent of other slices",
+                                                            OFFSET(constrained_encoding), AV_OPT_TYPE_BOOL,  { .i64 = 0 }, 0, 1, VE },
     { NULL }
 };
 

libavcodec/nvenc_hevc.c

@@ -173,6 +173,8 @@ static const AVOption options[] = {
                                                             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 },
+    { "constrained-encoding", "Enable constrainedFrame encoding where each slice in the constrained picture is independent of other slices",
+                                                            OFFSET(constrained_encoding), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
     { NULL }
 };
 

libavcodec/version.h

@@ -29,7 +29,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR  59
 #define LIBAVCODEC_VERSION_MINOR   7
-#define LIBAVCODEC_VERSION_MICRO 100
+#define LIBAVCODEC_VERSION_MICRO 101
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \