[FFmpeg-devel] [PATCH] lavf/qsv_scale: add interpolation methods support

[Artem Galin]

Since 1.33 API version
https://github.com/Intel-Media-SDK/MediaSDK/blob/master/api/include/mfxstructures.h#L2088

Signed-off-by: Artem Galin <artem.galin at intel.com>
---
 libavfilter/vf_scale_qsv.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/libavfilter/vf_scale_qsv.c b/libavfilter/vf_scale_qsv.c
index 5064dcbb60..1a6121c295 100644
--- a/libavfilter/vf_scale_qsv.c
+++ b/libavfilter/vf_scale_qsv.c
@@ -70,6 +70,7 @@ enum var_name {
 };
 
 #define QSV_HAVE_SCALING_CONFIG  QSV_VERSION_ATLEAST(1, 19)
+#define QSV_HAVE_INTERPOLATION_METHOD QSV_VERSION_ATLEAST(1, 33)
 
 typedef struct QSVScaleContext {
     const AVClass *class;
@@ -95,6 +96,7 @@ typedef struct QSVScaleContext {
     mfxExtVPPScaling         scale_conf;
 #endif
     int                      mode;
+    int                      interpmethod;
 
     mfxExtBuffer             *ext_buffers[1 + QSV_HAVE_SCALING_CONFIG];
     int                      num_ext_buf;
@@ -409,6 +411,10 @@ static int init_out_session(AVFilterContext *ctx)
     s->scale_conf.Header.BufferId     = MFX_EXTBUFF_VPP_SCALING;
     s->scale_conf.Header.BufferSz     = sizeof(mfxExtVPPScaling);
     s->scale_conf.ScalingMode         = s->mode;
+#if QSV_HAVE_INTERPOLATION_METHOD
+    s->scale_conf.InterpolationMethod = s->interpmethod;
+    av_log(ctx, AV_LOG_VERBOSE, "Interpolation method: %d\n", s->interpmethod);
+#endif
     s->ext_buffers[s->num_ext_buf++]  = (mfxExtBuffer*)&s->scale_conf;
     av_log(ctx, AV_LOG_VERBOSE, "Scaling mode: %d\n", s->mode);
 #endif
@@ -624,6 +630,17 @@ static const AVOption options[] = {
     { "low_power", "",                      0,             AV_OPT_TYPE_CONST,  { .i64 = 1}, 0,   0,     FLAGS, "mode"},
     { "hq",        "",                      0,             AV_OPT_TYPE_CONST,  { .i64 = 2}, 0,   0,     FLAGS, "mode"},
 #endif
+#if QSV_HAVE_INTERPOLATION_METHOD
+    { "interpmethod",  "set interpolation method", OFFSET(interpmethod), AV_OPT_TYPE_INT,   { .i64 = MFX_INTERPOLATION_DEFAULT}, MFX_INTERPOLATION_DEFAULT, MFX_INTERPOLATION_ADVANCED, FLAGS, "interpmethod"},
+    { "nearest",       "nearest neighbor method",  0,                    AV_OPT_TYPE_CONST, { .i64 = MFX_INTERPOLATION_NEAREST_NEIGHBOR}, INT_MIN, INT_MAX, FLAGS, "interpmethod"},
+    { "bilinear",      "bilinear method",          0,                    AV_OPT_TYPE_CONST, { .i64 = MFX_INTERPOLATION_BILINEAR},         INT_MIN, INT_MAX, FLAGS, "interpmethod"},
+    { "advanced",      "advanced method",          0,                    AV_OPT_TYPE_CONST, { .i64 = MFX_INTERPOLATION_ADVANCED},         INT_MIN, INT_MAX, FLAGS, "interpmethod"},
+#else
+    { "interpmethod",  "(not supported)",          OFFSET(interpmethod), AV_OPT_TYPE_INT,   { .i64 = 0}, 0, INT_MAX, FLAGS, "interpmethod"},
+    { "nearest",       "",                         0,                    AV_OPT_TYPE_CONST, { .i64 = 1}, 0, 0, FLAGS, "interpmethod"},
+    { "bilinear",      "",                         0,                    AV_OPT_TYPE_CONST, { .i64 = 2}, 0, 0, FLAGS, "interpmethod"},
+    { "advanced",      "",                         0,                    AV_OPT_TYPE_CONST, { .i64 = 3}, 0, 0, FLAGS, "interpmethod"},
+#endif
 
     { NULL },
 };
-- 
2.26.2