[libav-devel] [PATCH] avcodec/qsvenc: add VDENC support for H264 and HEVC

Linjie Fu linjie.fu at intel.com
Thu Nov 1 07:45:47 CET 2018


Add VDENC(lowpower mode) support for QSV h264 and HEVC
with the limitation of MSDK API verion greater than 1.15.

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 >=4.16)
- HEVC VDENC was supported >= ICE LAKE

use option "-low_power 1" to enable VDENC.

Signed-off-by: Linjie Fu <linjie.fu at intel.com>
---
 libavcodec/qsvenc.c      | 3 +++
 libavcodec/qsvenc.h      | 1 +
 libavcodec/qsvenc_h264.c | 3 +++
 libavcodec/qsvenc_hevc.c | 3 +++
 4 files changed, 10 insertions(+)

diff --git a/libavcodec/qsvenc.c b/libavcodec/qsvenc.c
index 17a0559f3..16d6e79e2 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 2d83c7b1a..997ccf2e3 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)
diff --git a/libavcodec/qsvenc_h264.c b/libavcodec/qsvenc_h264.c
index 164f57332..fc2d09154 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",  "low power mode for encoder h264_qsv",   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 471d17487..c86069c28 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", "low power mode for encoder hevc_qsv", OFFSET(qsv.low_power), AV_OPT_TYPE_INT, { .i64 =  0 },  0,  1, VE },
+#endif
 
     { NULL },
 };
-- 
2.17.1



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