libavcodec/qsvenc: Add min/max QP control options for I/P/B frame

To do more accurate QP control, add min/max QP control on I/P/B frame
separately to qsv encoder. qmax and qmin still work but newly-added
options have higher priority.

Signed-off-by: Yue Heng <yue.heng@intel.com>
Signed-off-by: Wenbin Chen <wenbin.chen@intel.com>

5 files changed, 72 insertions, 2 deletions

diff --git a/doc/encoders.texi b/doc/encoders.texi
index bee45f9853..1850c99fe9 100644
--- a/doc/encoders.texi
+++ b/doc/encoders.texi
@@ -3472,6 +3472,24 @@ Multi-Frame Mode.
 
 @item @var{repeat_pps}
 Repeat pps for every frame.
+
+@item @var{max_qp_i}
+Maximum video quantizer scale for I frame.
+
+@item @var{min_qp_i}
+Minimum video quantizer scale for I frame.
+
+@item @var{max_qp_p}
+Maximum video quantizer scale for P frame.
+
+@item @var{min_qp_p}
+Minimum video quantizer scale for P frame.
+
+@item @var{max_qp_b}
+Maximum video quantizer scale for B frame.
+
+@item @var{min_qp_b}
+Minimum video quantizer scale for B frame.
 @end table
 
 @subsection HEVC Options
@@ -3595,6 +3613,24 @@ range is [-63, 63] for 10 bit-depth or [-75, 75] for 12 bit-depth respectively.
 
 @item @var{int_ref_cycle_dist}
 Distance between the beginnings of the intra-refresh cycles in frames.
+
+@item @var{max_qp_i}
+Maximum video quantizer scale for I frame.
+
+@item @var{min_qp_i}
+Minimum video quantizer scale for I frame.
+
+@item @var{max_qp_p}
+Maximum video quantizer scale for P frame.
+
+@item @var{min_qp_p}
+Minimum video quantizer scale for P frame.
+
+@item @var{max_qp_b}
+Maximum video quantizer scale for B frame.
+
+@item @var{min_qp_b}
+Minimum video quantizer scale for B frame.
 @end table
 
 @subsection MPEG2 Options
diff --git a/libavcodec/qsvenc.c b/libavcodec/qsvenc.c
index 2b3b06767d..03e9e5523d 100644
--- a/libavcodec/qsvenc.c
+++ b/libavcodec/qsvenc.c
@@ -828,8 +828,13 @@ static int init_video_param(AVCodecContext *avctx, QSVEncContext *q)
 
             if (q->b_strategy >= 0)
                 q->extco2.BRefType = q->b_strategy ? MFX_B_REF_PYRAMID : MFX_B_REF_OFF;
-            if (avctx->qmin >= 0 && avctx->qmax >= 0 && avctx->qmin > avctx->qmax) {
-                av_log(avctx, AV_LOG_ERROR, "qmin and or qmax are set but invalid, please make sure min <= max\n");
+            if ((avctx->qmin >= 0 && avctx->qmax >= 0 && avctx->qmin > avctx->qmax) ||
+                (q->max_qp_i >= 0 && q->min_qp_i >= 0 && q->min_qp_i > q->max_qp_i) ||
+                (q->max_qp_p >= 0 && q->min_qp_p >= 0 && q->min_qp_p > q->max_qp_p) ||
+                (q->max_qp_b >= 0 && q->min_qp_b >= 0 && q->min_qp_b > q->max_qp_b)) {
+                av_log(avctx, AV_LOG_ERROR,
+                       "qmin and or qmax are set but invalid,"
+                       " please make sure min <= max\n");
                 return AVERROR(EINVAL);
             }
             if (avctx->qmin >= 0) {
@@ -840,6 +845,18 @@ static int init_video_param(AVCodecContext *avctx, QSVEncContext *q)
                 q->extco2.MaxQPI = avctx->qmax > 51 ? 51 : avctx->qmax;
                 q->extco2.MaxQPP = q->extco2.MaxQPB = q->extco2.MaxQPI;
             }
+            if (q->min_qp_i >= 0)
+                q->extco2.MinQPI = q->min_qp_i > 51 ? 51 : q->min_qp_i;
+            if (q->max_qp_i >= 0)
+                q->extco2.MaxQPI = q->max_qp_i > 51 ? 51 : q->max_qp_i;
+            if (q->min_qp_p >= 0)
+                q->extco2.MinQPP = q->min_qp_p > 51 ? 51 : q->min_qp_p;
+            if (q->max_qp_p >= 0)
+                q->extco2.MaxQPP = q->max_qp_p > 51 ? 51 : q->max_qp_p;
+            if (q->min_qp_b >= 0)
+                q->extco2.MinQPB = q->min_qp_b > 51 ? 51 : q->min_qp_b;
+            if (q->max_qp_b >= 0)
+                q->extco2.MaxQPB = q->max_qp_b > 51 ? 51 : q->max_qp_b;
             if (q->mbbrc >= 0)
                 q->extco2.MBBRC = q->mbbrc ? MFX_CODINGOPTION_ON : MFX_CODINGOPTION_OFF;
 
diff --git a/libavcodec/qsvenc.h b/libavcodec/qsvenc.h
index fec5e584db..b754ac4b56 100644
--- a/libavcodec/qsvenc.h
+++ b/libavcodec/qsvenc.h
@@ -100,6 +100,14 @@
 #define QSV_OPTION_LOW_DELAY_BRC \
 { "low_delay_brc",   "Allow to strictly obey avg frame size", OFFSET(qsv.low_delay_brc),  AV_OPT_TYPE_BOOL,{ .i64 = -1 }, -1,          1, VE },
 
+#define QSV_OPTION_MAX_MIN_QP \
+{ "max_qp_i", "Maximum video quantizer scale for I frame",       OFFSET(qsv.max_qp_i),       AV_OPT_TYPE_INT, { .i64 = -1 },  -1,          51, VE},                         \
+{ "min_qp_i", "Minimum video quantizer scale for I frame",       OFFSET(qsv.min_qp_i),       AV_OPT_TYPE_INT, { .i64 = -1 },  -1,          51, VE},                         \
+{ "max_qp_p", "Maximum video quantizer scale for P frame",       OFFSET(qsv.max_qp_p),       AV_OPT_TYPE_INT, { .i64 = -1 },  -1,          51, VE},                         \
+{ "min_qp_p", "Minimum video quantizer scale for P frame",       OFFSET(qsv.min_qp_p),       AV_OPT_TYPE_INT, { .i64 = -1 },  -1,          51, VE},                         \
+{ "max_qp_b", "Maximum video quantizer scale for B frame",       OFFSET(qsv.max_qp_b),       AV_OPT_TYPE_INT, { .i64 = -1 },  -1,          51, VE},                         \
+{ "min_qp_b", "Minimum video quantizer scale for B frame",       OFFSET(qsv.min_qp_b),       AV_OPT_TYPE_INT, { .i64 = -1 },  -1,          51, VE},
+
 extern const AVCodecHWConfigInternal *const ff_qsv_enc_hw_configs[];
 
 typedef int SetEncodeCtrlCB (AVCodecContext *avctx,
@@ -209,6 +217,13 @@ typedef struct QSVEncContext {
     int co3_idx;
     int exthevctiles_idx;
     int vp9_idx;
+
+    int max_qp_i;
+    int min_qp_i;
+    int max_qp_p;
+    int min_qp_p;
+    int max_qp_b;
+    int min_qp_b;
 } QSVEncContext;
 
 int ff_qsv_enc_init(AVCodecContext *avctx, QSVEncContext *q);
diff --git a/libavcodec/qsvenc_h264.c b/libavcodec/qsvenc_h264.c
index cf77ea575b..87b09360cb 100644
--- a/libavcodec/qsvenc_h264.c
+++ b/libavcodec/qsvenc_h264.c
@@ -114,6 +114,7 @@ static const AVOption options[] = {
     QSV_OPTION_B_STRATEGY
     QSV_OPTION_DBLK_IDC
     QSV_OPTION_LOW_DELAY_BRC
+    QSV_OPTION_MAX_MIN_QP
 
     { "cavlc",          "Enable CAVLC",                           OFFSET(qsv.cavlc),          AV_OPT_TYPE_BOOL, { .i64 = 0 },   0,          1, VE },
 #if QSV_HAVE_VCM
diff --git a/libavcodec/qsvenc_hevc.c b/libavcodec/qsvenc_hevc.c
index a6bf39c148..da2bf457af 100644
--- a/libavcodec/qsvenc_hevc.c
+++ b/libavcodec/qsvenc_hevc.c
@@ -233,6 +233,7 @@ static const AVOption options[] = {
     QSV_OPTION_B_STRATEGY
     QSV_OPTION_DBLK_IDC
     QSV_OPTION_LOW_DELAY_BRC
+    QSV_OPTION_MAX_MIN_QP
 
     { "idr_interval", "Distance (in I-frames) between IDR frames", OFFSET(qsv.idr_interval), AV_OPT_TYPE_INT, { .i64 = 0 }, -1, INT_MAX, VE, "idr_interval" },
     { "begin_only", "Output an IDR-frame only at the beginning of the stream", 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, 0, 0, VE, "idr_interval" },