avcodec/nvenc: Extended rate-control support as provided by SDK 7

Merged from libav commit by Yogender Gupta:
https://git.libav.org/?p=libav.git;a=commitdiff;h=70de2ea4261f860457a04e3d0c58c5543f403325

libavcodec/nvenc.c

@@ -724,10 +724,50 @@ static av_cold void nvenc_setup_rate_control(AVCodecContext *avctx)
         ctx->encode_config.rcParams.vbvBufferSize = 2 * ctx->encode_config.rcParams.averageBitRate;
     }
 
-    if (ctx->rc_lookahead > 0) {
-        ctx->encode_config.rcParams.enableLookahead = 1;
-        ctx->encode_config.rcParams.lookaheadDepth = FFMIN(ctx->rc_lookahead, 32);
+    if (ctx->aq) {
+        ctx->encode_config.rcParams.enableAQ   = 1;
+        ctx->encode_config.rcParams.aqStrength = ctx->aq_strength;
+        av_log(avctx, AV_LOG_VERBOSE, "AQ enabled.\n");
     }
+
+    if (ctx->temporal_aq) {
+        ctx->encode_config.rcParams.enableTemporalAQ = 1;
+        av_log(avctx, AV_LOG_VERBOSE, "Temporal AQ enabled.\n");
+    }
+
+    if (ctx->rc_lookahead) {
+        int lkd_bound = FFMIN(ctx->nb_surfaces, ctx->async_depth) -
+                        ctx->encode_config.frameIntervalP - 4;
+
+        if (lkd_bound < 0) {
+            av_log(avctx, AV_LOG_WARNING,
+                   "Lookahead not enabled. Increase buffer delay (-delay).\n");
+        } else {
+            ctx->encode_config.rcParams.enableLookahead = 1;
+            ctx->encode_config.rcParams.lookaheadDepth  = av_clip(ctx->rc_lookahead, 0, lkd_bound);
+            ctx->encode_config.rcParams.disableIadapt   = ctx->no_scenecut;
+            ctx->encode_config.rcParams.disableBadapt   = !ctx->b_adapt;
+            av_log(avctx, AV_LOG_VERBOSE,
+                   "Lookahead enabled: depth %d, scenecut %s, B-adapt %s.\n",
+                   ctx->encode_config.rcParams.lookaheadDepth,
+                   ctx->encode_config.rcParams.disableIadapt ? "disabled" : "enabled",
+                   ctx->encode_config.rcParams.disableBadapt ? "disabled" : "enabled");
+        }
+    }
+
+    if (ctx->strict_gop) {
+        ctx->encode_config.rcParams.strictGOPTarget = 1;
+        av_log(avctx, AV_LOG_VERBOSE, "Strict GOP target enabled.\n");
+    }
+
+    if (ctx->nonref_p)
+        ctx->encode_config.rcParams.enableNonRefP = 1;
+
+    if (ctx->zerolatency)
+        ctx->encode_config.rcParams.zeroReorderDelay = 1;
+
+    if (ctx->quality)
+        ctx->encode_config.rcParams.targetQuality = ctx->quality;
 }
 
 static av_cold int nvenc_setup_h264_config(AVCodecContext *avctx)

libavcodec/nvenc.h

@@ -183,6 +183,15 @@ typedef struct NvencContext
     int flags;
     int async_depth;
     int rc_lookahead;
+    int aq;
+    int no_scenecut;
+    int b_adapt;
+    int temporal_aq;
+    int zerolatency;
+    int nonref_p;
+    int strict_gop;
+    int aq_strength;
+    int quality;
 } NvencContext;
 
 int ff_nvenc_encode_init(AVCodecContext *avctx);

libavcodec/nvenc_h264.c

@@ -84,6 +84,15 @@ static const AVOption options[] = {
     { "any",      "Pick the first device available",      0,                   AV_OPT_TYPE_CONST,  { .i64 = ANY_DEVICE },           0, 0, VE, "gpu" },
     { "list",     "List the available devices",           0,                   AV_OPT_TYPE_CONST,  { .i64 = LIST_DEVICES },         0, 0, VE, "gpu" },
     { "delay",    "Delay frame output by the given amount of frames", OFFSET(async_depth), AV_OPT_TYPE_INT, { .i64 = INT_MAX }, 0, INT_MAX, VE },
+    { "no-scenecut", "When lookahead is enabled, set this to 1 to disable adaptive I-frame insertion at scene cuts", OFFSET(no_scenecut), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
+    { "b_adapt", "When lookahead is enabled, set this to 0 to disable adaptive B-frame decision", OFFSET(b_adapt), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE },
+    { "spatial-aq", "set to 1 to enable Spatial AQ", OFFSET(aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
+    { "temporal-aq", "set to 1 to enable Temporal AQ",     OFFSET(temporal_aq),  AV_OPT_TYPE_INT,   { .i64 = 0                       }, 0, 1, VE        },
+    { "zerolatency", "Set 1 to indicate zero latency operation (no reordering delay)", OFFSET(zerolatency), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
+    { "nonref_p", "Set this to 1 to enable automatic insertion of non-reference P-frames", OFFSET(nonref_p), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
+    { "strict_gop", "Set 1 to minimize GOP-to-GOP rate fluctuations", OFFSET(strict_gop), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
+    { "aq-strength", "When Spatial AQ is enabled, this field is used to specify AQ strength. AQ strength scale is from 1 (low) - 15 (aggressive)", OFFSET(aq_strength), AV_OPT_TYPE_INT, { .i64 = 8 }, 1, 15, VE },
+    { "cq", "Set target quality level (0 to 51, 0 means automatic) for constant quality mode in VBR rate control", OFFSET(quality), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 51, VE },
     { NULL }
 };
 

libavcodec/nvenc_hevc.c

@@ -83,6 +83,13 @@ static const AVOption options[] = {
     { "any",      "Pick the first device available",      0,                   AV_OPT_TYPE_CONST,  { .i64 = ANY_DEVICE },           0, 0, VE, "device" },
     { "list",     "List the available devices",           0,                   AV_OPT_TYPE_CONST,  { .i64 = LIST_DEVICES },         0, 0, VE, "device" },
     { "delay",    "Delay frame output by the given amount of frames", OFFSET(async_depth), AV_OPT_TYPE_INT, { .i64 = INT_MAX }, 0, INT_MAX, VE },
+    { "no-scenecut", "When lookahead is enabled, set this to 1 to disable adaptive I-frame insertion at scene cuts", OFFSET(no_scenecut), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
+    { "spatial_aq", "set to 1 to enable Spatial AQ", OFFSET(aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
+    { "zerolatency", "Set 1 to indicate zero latency operation (no reordering delay)", OFFSET(zerolatency), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
+    { "nonref_p", "Set this to 1 to enable automatic insertion of non-reference P-frames", OFFSET(nonref_p), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
+    { "strict_gop", "Set 1 to minimize GOP-to-GOP rate fluctuations", OFFSET(strict_gop), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
+    { "aq-strength", "When Spatial AQ is enabled, this field is used to specify AQ strength. AQ strength scale is from 1 (low) - 15 (aggressive)", OFFSET(aq_strength), AV_OPT_TYPE_INT, { .i64 = 8 }, 1, 15, VE },
+    { "cq", "Set target quality level (0 to 51, 0 means automatic) for constant quality mode in VBR rate control", OFFSET(quality), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 51, VE },
     { NULL }
 };
 

libavcodec/version.h

@@ -29,7 +29,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR  57
 #define LIBAVCODEC_VERSION_MINOR  58
-#define LIBAVCODEC_VERSION_MICRO 100
+#define LIBAVCODEC_VERSION_MICRO 101
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \