Add VDENC(lowpower mode) support for QSV H264
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 kernel version >= 4.16)
Use option "-low_power 1" to enable VDENC.
Add in dump_video_param() to show the status of VDENC in runtime log.
Signed-off-by: Linjie Fu <linjie...@intel.com>
---
[v2]: Modify the commit message and option comments, use AV_OPT_TYPE_BOOL
to replace AV_OPT_TYPE_INT.
[v3]: Enable H264 VDENC separately.
[v4]: Add in dump_video_param to show the status of VDENC in runtime
log.
[v5]: Use print_threestate.
libavcodec/qsvenc.c | 7 +++++++
libavcodec/qsvenc.h | 2 ++
libavcodec/qsvenc_h264.c | 3 +++
3 files changed, 12 insertions(+)
diff --git a/libavcodec/qsvenc.c b/libavcodec/qsvenc.c
index 948751daf4..b1ec90c6c6 100644
--- a/libavcodec/qsvenc.c
+++ b/libavcodec/qsvenc.c
@@ -226,6 +226,10 @@ static void dump_video_param(AVCodecContext *avctx,
QSVEncContext *q,
av_log(avctx, AV_LOG_VERBOSE, "\n");
#endif
+#if QSV_HAVE_VDENC
+ av_log(avctx, AV_LOG_VERBOSE, "VDENC: %s\n",
print_threestate(info->LowPower));
+#endif
+
#if QSV_VERSION_ATLEAST(1, 8)
av_log(avctx, AV_LOG_VERBOSE,
"RepeatPPS: %s; NumMbPerSlice: %"PRIu16"; LookAheadDS: ",
@@ -464,6 +468,9 @@ 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 50cc4267e7..a396aa7d3f 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) || defined(__CYGWIN__)
#define QSV_HAVE_AVBR QSV_VERSION_ATLEAST(1, 3)
@@ -162,6 +163,7 @@ typedef struct QSVEncContext {
int recovery_point_sei;
int a53_cc;
+ int low_power;
#if QSV_HAVE_MF
int mfmode;
diff --git a/libavcodec/qsvenc_h264.c b/libavcodec/qsvenc_h264.c
index 07c9d64e6b..40071d805a 100644
--- a/libavcodec/qsvenc_h264.c
+++ b/libavcodec/qsvenc_h264.c
@@ -153,6 +153,9 @@ 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, BRC modes, etc.)", OFFSET(qsv.low_power), AV_OPT_TYPE_BOOL, { .i64
= 0 }, 0, 1, VE},
+#endif
{ NULL },
};
--
2.17.1
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