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avcodec/qsv : Added look ahead rate control mode

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Reviewed-by: Ivan Uskov <ivan.uskov@nablet.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Sven Dueking 2015-08-21 09:17:35 +01:00 committed by Michael Niedermayer
parent dead1964ea
commit 67e87f8050
3 changed files with 49 additions and 2 deletions
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31
libavcodec/qsvenc.c
View File

@ -107,8 +107,16 @@ static int init_video_param(AVCodecContext *avctx, QSVEncContext *q)
q->param.mfx.RateControlMethod = MFX_RATECONTROL_CBR;
ratecontrol_desc = "constant bitrate (CBR)";
} else if (!avctx->rc_max_rate) {
q->param.mfx.RateControlMethod = MFX_RATECONTROL_AVBR;
ratecontrol_desc = "average variable bitrate (AVBR)";
#if QSV_VERSION_ATLEAST(1,7)
if (q->look_ahead) {
q->param.mfx.RateControlMethod = MFX_RATECONTROL_LA;
ratecontrol_desc = "lookahead (LA)";
} else
#endif
{
q->param.mfx.RateControlMethod = MFX_RATECONTROL_AVBR;
ratecontrol_desc = "average variable bitrate (AVBR)";
}
} else {
q->param.mfx.RateControlMethod = MFX_RATECONTROL_VBR;
ratecontrol_desc = "variable bitrate (VBR)";
@ -132,6 +140,9 @@ static int init_video_param(AVCodecContext *avctx, QSVEncContext *q)
break;
case MFX_RATECONTROL_AVBR:
#if QSV_VERSION_ATLEAST(1,7)
case MFX_RATECONTROL_LA:
#endif
q->param.mfx.TargetKbps = avctx->bit_rate / 1000;
q->param.mfx.Convergence = q->avbr_convergence;
q->param.mfx.Accuracy = q->avbr_accuracy;
@ -151,6 +162,22 @@ static int init_video_param(AVCodecContext *avctx, QSVEncContext *q)
q->extparam[0] = (mfxExtBuffer *)&q->extco;
#if QSV_VERSION_ATLEAST(1,6)
q->extco2.Header.BufferId = MFX_EXTBUFF_CODING_OPTION2;
q->extco2.Header.BufferSz = sizeof(q->extco2);
#if QSV_VERSION_ATLEAST(1,7)
// valid value range is from 10 to 100 inclusive
// to instruct the encoder to use the default value this should be set to zero
q->extco2.LookAheadDepth = q->look_ahead_depth != 0 ? FFMAX(10, q->look_ahead_depth) : 0;
#endif
#if QSV_VERSION_ATLEAST(1,8)
q->extco2.LookAheadDS = q->look_ahead_downsampling;
#endif
q->extparam[1] = (mfxExtBuffer *)&q->extco2;
#endif
q->param.ExtParam = q->extparam;
q->param.NumExtParam = FF_ARRAY_ELEMS(q->extparam);
}

8
libavcodec/qsvenc.h
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@ -50,7 +50,12 @@ typedef struct QSVEncContext {
mfxFrameAllocRequest req;
mfxExtCodingOption extco;
#if QSV_VERSION_ATLEAST(1,6)
mfxExtCodingOption2 extco2;
mfxExtBuffer *extparam[2];
#else
mfxExtBuffer *extparam[1];
#endif
AVFifoBuffer *async_fifo;
@ -62,6 +67,9 @@ typedef struct QSVEncContext {
int avbr_accuracy;
int avbr_convergence;
int pic_timing_sei;
int look_ahead;
int look_ahead_depth;
int look_ahead_downsampling;
char *load_plugins;
} QSVEncContext;

12
libavcodec/qsvenc_h264.c
View File

@ -71,6 +71,18 @@ static const AVOption options[] = {
{ "avbr_convergence", "Convergence of the AVBR ratecontrol", OFFSET(qsv.avbr_convergence), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
{ "pic_timing_sei", "Insert picture timing SEI with pic_struct_syntax element", OFFSET(qsv.pic_timing_sei), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE },
#if QSV_VERSION_ATLEAST(1,7)
{ "look_ahead", "Use VBR algorithm with look ahead", OFFSET(qsv.look_ahead), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE },
{ "look_ahead_depth", "Depth of look ahead in number frames", OFFSET(qsv.look_ahead_depth), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 100, VE },
#endif
#if QSV_VERSION_ATLEAST(1,8)
{ "look_ahead_downsampling", NULL, OFFSET(qsv.look_ahead_downsampling), AV_OPT_TYPE_INT, { .i64 = MFX_LOOKAHEAD_DS_UNKNOWN }, MFX_LOOKAHEAD_DS_UNKNOWN, MFX_LOOKAHEAD_DS_2x, VE, "look_ahead_downsampling" },
{ "unknown" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_LOOKAHEAD_DS_UNKNOWN }, INT_MIN, INT_MAX, VE, "look_ahead_downsampling" },
{ "off" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_LOOKAHEAD_DS_OFF }, INT_MIN, INT_MAX, VE, "look_ahead_downsampling" },
{ "2x" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_LOOKAHEAD_DS_2x }, INT_MIN, INT_MAX, VE, "look_ahead_downsampling" },
#endif
{ "profile", NULL, OFFSET(qsv.profile), AV_OPT_TYPE_INT, { .i64 = MFX_PROFILE_UNKNOWN }, 0, INT_MAX, VE, "profile" },
{ "unknown" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_UNKNOWN }, INT_MIN, INT_MAX, VE, "profile" },
{ "baseline", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_AVC_BASELINE }, INT_MIN, INT_MAX, VE, "profile" },