avcodec/nvenc: add support for specifying entropy coding mode

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

libavcodec/nvenc.c

@@ -317,6 +317,12 @@ static int nvenc_check_capabilities(AVCodecContext *avctx)
         return AVERROR(ENOSYS);
     }
 
+    ret = nvenc_check_cap(avctx, NV_ENC_CAPS_SUPPORT_CABAC);
+    if (ctx->coder == NV_ENC_H264_ENTROPY_CODING_MODE_CABAC && ret <= 0) {
+        av_log(avctx, AV_LOG_VERBOSE, "CABAC entropy coding not supported\n");
+        return AVERROR(ENOSYS);
+    }
+
     return 0;
 }
 
@@ -916,6 +922,9 @@ static av_cold int nvenc_setup_h264_config(AVCodecContext *avctx)
 
     h264->level = ctx->level;
 
+    if (ctx->coder >= 0)
+        h264->entropyCodingMode = ctx->coder;
+
     return 0;
 }
 

libavcodec/nvenc.h

@@ -162,6 +162,7 @@ typedef struct NvencContext
     int init_qp_i;
     int cqp;
     int weighted_pred;
+    int coder;
 } NvencContext;
 
 int ff_nvenc_encode_init(AVCodecContext *avctx);

libavcodec/nvenc_h264.c

@@ -119,6 +119,13 @@ static const AVOption options[] = {
                                                             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 },
+    { "coder",        "Coder type",                         OFFSET(coder),        AV_OPT_TYPE_INT,   { .i64 = -1                                         },-1, 2, VE, "coder" },
+    { "default",      "",                                   0,                    AV_OPT_TYPE_CONST, { .i64 = -1                                         }, 0, 0, VE, "coder" },
+    { "auto",         "",                                   0,                    AV_OPT_TYPE_CONST, { .i64 = NV_ENC_H264_ENTROPY_CODING_MODE_AUTOSELECT }, 0, 0, VE, "coder" },
+    { "cabac",        "",                                   0,                    AV_OPT_TYPE_CONST, { .i64 = NV_ENC_H264_ENTROPY_CODING_MODE_CABAC      }, 0, 0, VE, "coder" },
+    { "cavlc",        "",                                   0,                    AV_OPT_TYPE_CONST, { .i64 = NV_ENC_H264_ENTROPY_CODING_MODE_CAVLC      }, 0, 0, VE, "coder" },
+    { "ac",           "",                                   0,                    AV_OPT_TYPE_CONST, { .i64 = NV_ENC_H264_ENTROPY_CODING_MODE_CABAC      }, 0, 0, VE, "coder" },
+    { "vlc",          "",                                   0,                    AV_OPT_TYPE_CONST, { .i64 = NV_ENC_H264_ENTROPY_CODING_MODE_CAVLC      }, 0, 0, VE, "coder" },
     { NULL }
 };
 

libavcodec/version.h

@@ -29,7 +29,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR  57
 #define LIBAVCODEC_VERSION_MINOR 104
-#define LIBAVCODEC_VERSION_MICRO 100
+#define LIBAVCODEC_VERSION_MICRO 101
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \