avcodec/nvenc: add weighted prediction support

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

libavcodec/nvenc.c

@@ -298,6 +298,12 @@ static int nvenc_check_capabilities(AVCodecContext *avctx)
         return AVERROR(ENOSYS);
     }
 
+    ret = nvenc_check_cap(avctx, NV_ENC_CAPS_SUPPORT_WEIGHTED_PREDICTION);
+    if (ctx->weighted_pred > 0 && ret <= 0) {
+        av_log (avctx, AV_LOG_VERBOSE, "Weighted Prediction not supported\n");
+        return AVERROR(ENOSYS);
+    }
+
     return 0;
 }
 
@@ -1032,6 +1038,9 @@ static av_cold int nvenc_setup_encoder(AVCodecContext *avctx)
     ctx->init_encode_params.enableEncodeAsync = 0;
     ctx->init_encode_params.enablePTD = 1;
 
+    if (ctx->weighted_pred == 1)
+        ctx->init_encode_params.enableWeightedPrediction = 1;
+
     if (ctx->bluray_compat) {
         ctx->aud = 1;
         avctx->refs = FFMIN(FFMAX(avctx->refs, 0), 6);

libavcodec/nvenc.h

@@ -161,6 +161,7 @@ typedef struct NvencContext
     int init_qp_b;
     int init_qp_i;
     int cqp;
+    int weighted_pred;
 } NvencContext;
 
 int ff_nvenc_encode_init(AVCodecContext *avctx);

libavcodec/nvenc_h264.c

@@ -117,6 +117,8 @@ static const AVOption options[] = {
     { "init_qpI",     "Initial QP value for I frame",       OFFSET(init_qp_i),    AV_OPT_TYPE_INT,   { .i64 = -1 }, -1, 51, VE },
     { "qp",           "Constant quantization parameter rate control method",
                                                             OFFSET(cqp),          AV_OPT_TYPE_INT,   { .i64 = -1 }, -1, 51, VE },
+    { "weighted_pred","Set 1 to enable weighted prediction",
+                                                            OFFSET(weighted_pred),AV_OPT_TYPE_INT,   { .i64 = 0 }, 0, 1, VE },
     { NULL }
 };
 

libavcodec/nvenc_hevc.c

@@ -114,6 +114,8 @@ static const AVOption options[] = {
     { "init_qpI",     "Initial QP value for I frame",       OFFSET(init_qp_i),    AV_OPT_TYPE_INT,   { .i64 = -1 }, -1, 51, VE },
     { "qp",           "Constant quantization parameter rate control method",
                                                             OFFSET(cqp),          AV_OPT_TYPE_INT,   { .i64 = -1 }, -1, 51, VE },
+    { "weighted_pred","Set 1 to enable weighted prediction",
+                                                            OFFSET(weighted_pred),AV_OPT_TYPE_INT,   { .i64 = 0 }, 0, 1, VE },
     { NULL }
 };
 

libavcodec/version.h

@@ -29,7 +29,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR  57
 #define LIBAVCODEC_VERSION_MINOR  95
-#define LIBAVCODEC_VERSION_MICRO 100
+#define LIBAVCODEC_VERSION_MICRO 101
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \