From e716323fa8526c7243ce73edd077761dc40e5f86 Mon Sep 17 00:00:00 2001
From: Linjie Fu <linjie.fu@intel.com>
Date: Mon, 5 Nov 2018 10:28:59 +0800
Subject: [PATCH] qsvenc: Add VDENC support for H264 and HEVC

Add VDENC(lowpower mode) support for QSV h264 and HEVC

It's an experimental function(like lowpower in vaapi) with
some limitations:
- CBR/VBR require HuC which should be explicitly loaded via i915
module parameter(i915.enable_guc=2 for linux kerner version >= 4.16)
- HEVC VDENC was supported >= ICE LAKE

use option "-low_power 1" to enable VDENC.

Signed-off-by: Linjie Fu <linjie.fu@intel.com>
---
 libavcodec/qsvenc.c      | 3 +++
 libavcodec/qsvenc.h      | 2 ++
 libavcodec/qsvenc_h264.c | 3 +++
 libavcodec/qsvenc_hevc.c | 3 +++
 4 files changed, 11 insertions(+)

diff --git a/libavcodec/qsvenc.c b/libavcodec/qsvenc.c
index 17a0559f36..16d6e79e2b 100644
--- a/libavcodec/qsvenc.c
+++ b/libavcodec/qsvenc.c
@@ -472,6 +472,9 @@ static int init_video_param(AVCodecContext *avctx, QSVEncContext *q)
         }
     }
 
+#if QSV_HAVE_VDENC
+    q->param.mfx.LowPower           = q->low_power ? MFX_CODINGOPTION_ON:MFX_CODINGOPTION_OFF;
+#endif
     q->param.mfx.CodecProfile       = q->profile;
     q->param.mfx.TargetUsage        = avctx->compression_level;
     q->param.mfx.GopPicSize         = FFMAX(0, avctx->gop_size);
diff --git a/libavcodec/qsvenc.h b/libavcodec/qsvenc.h
index 2d83c7b1af..b74b977e88 100644
--- a/libavcodec/qsvenc.h
+++ b/libavcodec/qsvenc.h
@@ -44,6 +44,7 @@
 #define QSV_HAVE_LA     QSV_VERSION_ATLEAST(1, 7)
 #define QSV_HAVE_LA_DS  QSV_VERSION_ATLEAST(1, 8)
 #define QSV_HAVE_LA_HRD QSV_VERSION_ATLEAST(1, 11)
+#define QSV_HAVE_VDENC  QSV_VERSION_ATLEAST(1, 15)
 
 #if defined(_WIN32)
 #define QSV_HAVE_AVBR   QSV_VERSION_ATLEAST(1, 3)
@@ -159,6 +160,7 @@ typedef struct QSVEncContext {
     int int_ref_cycle_size;
     int int_ref_qp_delta;
     int recovery_point_sei;
+    int low_power;
 
 #if QSV_HAVE_MF
     int mfmode;
diff --git a/libavcodec/qsvenc_h264.c b/libavcodec/qsvenc_h264.c
index 164f57332f..795e27c002 100644
--- a/libavcodec/qsvenc_h264.c
+++ b/libavcodec/qsvenc_h264.c
@@ -101,6 +101,9 @@ static const AVOption options[] = {
     { "off"    , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_MF_DISABLED }, INT_MIN, INT_MAX,     VE, "mfmode" },
     { "auto"   , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_MF_AUTO     }, INT_MIN, INT_MAX,     VE, "mfmode" },
 #endif
+#if QSV_HAVE_VDENC
+    { "low_power", "enable low power mode (experimental, many limitations by mfx version, HW platform, BRC modes, etc.", OFFSET(qsv.low_power), AV_OPT_TYPE_INT, { .i64 =  0 }, 0, 1, VE},
+#endif
 
     { NULL },
 };
diff --git a/libavcodec/qsvenc_hevc.c b/libavcodec/qsvenc_hevc.c
index 471d174873..cba671bb90 100644
--- a/libavcodec/qsvenc_hevc.c
+++ b/libavcodec/qsvenc_hevc.c
@@ -238,6 +238,9 @@ static const AVOption options[] = {
     { "main",    NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_HEVC_MAIN    }, INT_MIN, INT_MAX,     VE, "profile" },
     { "main10",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_HEVC_MAIN10  }, INT_MIN, INT_MAX,     VE, "profile" },
     { "mainsp",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_HEVC_MAINSP  }, INT_MIN, INT_MAX,     VE, "profile" },
+#if QSV_HAVE_VDENC
+    { "low_power", "enable low power mode (experimental, many limitations by mfx version, HW platform, BRC modes, etc.", OFFSET(qsv.low_power), AV_OPT_TYPE_INT, { .i64 =  0 },  0,  1, VE },
+#endif
 
     { NULL },
 };