avcodec/amfenc: add smart access video option

This commit adds option for enabling SmartAccess Video (SAV)
in AMF encoders. SAV is an AMD hardware-specific feature which
enables the parallelization of encode and decode streams across
multiple Video Codec Engine (VCN) hardware instances.

Author: lucenticus

libavcodec/amfenc.h

@@ -72,6 +72,7 @@ typedef struct AMFEncoderContext {
     int                 b_frame_delta_qp;
     int                 ref_b_frame_delta_qp;
     int                 bit_depth;
+    int                 smart_access_video;
 
     // Dynamic options, can be set after Init() call
 

libavcodec/amfenc_av1.c

@@ -133,6 +133,8 @@ static const AVOption options[] = {
     { "1080p",                  "", 0, AV_OPT_TYPE_CONST, {.i64 = AMF_VIDEO_ENCODER_AV1_ALIGNMENT_MODE_64X16_1080P_CODED_1082   }, 0, 0, VE, .unit = "align" },
     { "none",                   "", 0, AV_OPT_TYPE_CONST, {.i64 = AMF_VIDEO_ENCODER_AV1_ALIGNMENT_MODE_NO_RESTRICTIONS          }, 0, 0, VE, .unit = "align" },
 
+    { "smart_access_video",     "Enable Smart Access Video to enhance  performance by utilizing both APU and dGPU memory access",                OFFSET(smart_access_video),             AV_OPT_TYPE_BOOL, {.i64 = -1  }, -1, 1, VE},
+
     //Pre Analysis options
     { "preanalysis",                            "Enable preanalysis",                                           OFFSET(preanalysis),                            AV_OPT_TYPE_BOOL,   {.i64 = -1 }, -1, 1, VE },
 
@@ -326,6 +328,21 @@ FF_ENABLE_DEPRECATION_WARNINGS
             av_log(ctx, AV_LOG_DEBUG, "Rate control turned to Peak VBR\n");
         }
     }
+    if (ctx->smart_access_video != -1) {
+        AMF_ASSIGN_PROPERTY_BOOL(res, ctx->encoder, AMF_VIDEO_ENCODER_AV1_ENABLE_SMART_ACCESS_VIDEO, ctx->smart_access_video != 0);
+        if (res != AMF_OK) {
+            av_log(avctx, AV_LOG_ERROR, "The Smart Access Video is not supported by AMF.\n");
+            if (ctx->smart_access_video != 0)
+                return AVERROR(ENOSYS);
+        } else {
+            av_log(avctx, AV_LOG_INFO, "The Smart Access Video (%d) is set.\n", ctx->smart_access_video);
+            // Set low latency mode if Smart Access Video is enabled
+            if (ctx->smart_access_video != 0) {
+                AMF_ASSIGN_PROPERTY_BOOL(res, ctx->encoder, AMF_VIDEO_ENCODER_AV1_ENCODING_LATENCY_MODE, AMF_VIDEO_ENCODER_AV1_ENCODING_LATENCY_MODE_LOWEST_LATENCY);
+                av_log(avctx, AV_LOG_INFO, "The Smart Access Video set low latency mode.\n");
+            }
+        }
+    }
 
     // Pre-Pass, Pre-Analysis, Two-Pass
     if (ctx->rate_control_mode == AMF_VIDEO_ENCODER_AV1_RATE_CONTROL_METHOD_CONSTANT_QP) {

libavcodec/amfenc_h264.c

@@ -139,6 +139,8 @@ static const AVOption options[] = {
     { "forced_idr",     "Force I frames to be IDR frames",      OFFSET(forced_idr)   , AV_OPT_TYPE_BOOL,  { .i64 = 0  }, 0, 1, VE },
     { "aud",            "Inserts AU Delimiter NAL unit",        OFFSET(aud)          , AV_OPT_TYPE_BOOL,  { .i64 = -1 }, -1, 1, VE },
 
+    { "smart_access_video",     "Enable Smart Access Video to enhance  performance by utilizing both APU and dGPU memory access",    OFFSET(smart_access_video), AV_OPT_TYPE_BOOL, {.i64 = -1  }, -1, 1, VE},
+
     //Pre Analysis options
     { "preanalysis",                            "Enable preanalysis",                                           OFFSET(preanalysis),                            AV_OPT_TYPE_BOOL,   {.i64 = -1 }, -1, 1, VE },
 
@@ -399,6 +401,22 @@ FF_ENABLE_DEPRECATION_WARNINGS
         AMF_ASSIGN_PROPERTY_BOOL(res, ctx->encoder, AMF_VIDEO_ENCODER_LOWLATENCY_MODE, ((ctx->latency == 0) ? false : true));
     }
 
+    if (ctx->smart_access_video != -1) {
+        AMF_ASSIGN_PROPERTY_BOOL(res, ctx->encoder, AMF_VIDEO_ENCODER_ENABLE_SMART_ACCESS_VIDEO, ctx->smart_access_video != 0);
+        if (res != AMF_OK) {
+            av_log(avctx, AV_LOG_ERROR, "The Smart Access Video is not supported by AMF.\n");
+            if (ctx->smart_access_video != 0)
+                return AVERROR(ENOSYS);
+        } else {
+            av_log(avctx, AV_LOG_INFO, "The Smart Access Video (%d) is set.\n", ctx->smart_access_video);
+            // Set low latency mode if Smart Access Video is enabled
+            if (ctx->smart_access_video != 0) {
+                AMF_ASSIGN_PROPERTY_BOOL(res, ctx->encoder, AMF_VIDEO_ENCODER_LOWLATENCY_MODE, true);
+                av_log(avctx, AV_LOG_INFO, "The Smart Access Video set low latency mode.\n");
+            }
+        }
+    }
+
     if (ctx->preanalysis != -1) {
         AMF_ASSIGN_PROPERTY_BOOL(res, ctx->encoder, AMF_VIDEO_ENCODER_PRE_ANALYSIS_ENABLE, !!((ctx->preanalysis == 0) ? false : true));
     }

libavcodec/amfenc_hevc.c

@@ -109,6 +109,8 @@ static const AVOption options[] = {
     { "forced_idr",     "Force I frames to be IDR frames",          OFFSET(forced_idr)    ,AV_OPT_TYPE_BOOL,{ .i64 = 0  }, 0, 1, VE },
     { "aud",            "Inserts AU Delimiter NAL unit",            OFFSET(aud)           ,AV_OPT_TYPE_BOOL,{ .i64 = -1 }, -1, 1, VE },
 
+    { "smart_access_video",     "Enable Smart Access Video to enhance  performance by utilizing both APU and dGPU memory access",        OFFSET(smart_access_video), AV_OPT_TYPE_BOOL, {.i64 = -1  }, -1, 1, VE},
+
     //Pre Analysis options
     { "preanalysis",                            "Enable preanalysis", OFFSET(preanalysis),                            AV_OPT_TYPE_BOOL,   {.i64 = -1 }, -1, 1, VE },
 
@@ -309,6 +311,22 @@ FF_ENABLE_DEPRECATION_WARNINGS
         }
     }
 
+    if (ctx->smart_access_video != -1) {
+        AMF_ASSIGN_PROPERTY_BOOL(res, ctx->encoder, AMF_VIDEO_ENCODER_HEVC_ENABLE_SMART_ACCESS_VIDEO, ctx->smart_access_video != 0);
+        if (res != AMF_OK) {
+            av_log(avctx, AV_LOG_ERROR, "The Smart Access Video is not supported by AMF.\n");
+            if (ctx->smart_access_video != 0)
+                return AVERROR(ENOSYS);
+        } else {
+            av_log(avctx, AV_LOG_INFO, "The Smart Access Video (%d) is set.\n", ctx->smart_access_video);
+            // Set low latency mode if Smart Access Video is enabled
+            if (ctx->smart_access_video != 0) {
+                AMF_ASSIGN_PROPERTY_BOOL(res, ctx->encoder, AMF_VIDEO_ENCODER_HEVC_LOWLATENCY_MODE, true);
+                av_log(avctx, AV_LOG_INFO, "The Smart Access Video set low latency mode.\n");
+            }
+        }
+    }
+
     // Pre-Pass, Pre-Analysis, Two-Pass
     if (ctx->rate_control_mode == AMF_VIDEO_ENCODER_HEVC_RATE_CONTROL_METHOD_CONSTANT_QP) {
         AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder, AMF_VIDEO_ENCODER_HEVC_PREENCODE_ENABLE, 0);