@@ -68,7 +68,9 @@ typedef struct QSVDeintContext {

     int             nb_surface_ptrs;

     mfxExtOpaqueSurfaceAlloc opaque_alloc;

-    mfxExtBuffer            *ext_buffers[1];

+    mfxExtVPPDeinterlacing   deint_conf;

+    mfxExtBuffer            *ext_buffers[2];

+    int                      num_ext_buffers;

     QSVFrame *work_frames;

@@ -76,6 +78,9 @@ typedef struct QSVDeintContext {

     int got_output_frame;

     int eof;

+

+    /* option for Deinterlacing algorithm to be used */

+    int mode;

 } QSVDeintContext;

 static void qsvdeint_uninit(AVFilterContext *ctx)

@@ -211,6 +216,12 @@ static int init_out_session(AVFilterContext *ctx)

     memset(&par, 0, sizeof(par));

+    s->deint_conf.Header.BufferId = MFX_EXTBUFF_VPP_DEINTERLACING;

+    s->deint_conf.Header.BufferSz = sizeof(s->deint_conf);

+    s->deint_conf.Mode = s->mode;

+

+    s->ext_buffers[s->num_ext_buffers++] = (mfxExtBuffer *)&s->deint_conf;

+

     if (opaque) {

         s->surface_ptrs = av_mallocz_array(hw_frames_hwctx->nb_surfaces,

                                            sizeof(*s->surface_ptrs));

@@ -229,10 +240,7 @@ static int init_out_session(AVFilterContext *ctx)

         s->opaque_alloc.Header.BufferId = MFX_EXTBUFF_OPAQUE_SURFACE_ALLOCATION;

         s->opaque_alloc.Header.BufferSz = sizeof(s->opaque_alloc);

-        s->ext_buffers[0] = (mfxExtBuffer*)&s->opaque_alloc;

-

-        par.ExtParam    = s->ext_buffers;

-        par.NumExtParam = FF_ARRAY_ELEMS(s->ext_buffers);

+        s->ext_buffers[s->num_ext_buffers++] = (mfxExtBuffer *)&s->opaque_alloc;

         par.IOPattern = MFX_IOPATTERN_IN_OPAQUE_MEMORY | MFX_IOPATTERN_OUT_OPAQUE_MEMORY;

     } else {

@@ -260,6 +268,9 @@ static int init_out_session(AVFilterContext *ctx)

         par.IOPattern = MFX_IOPATTERN_IN_VIDEO_MEMORY | MFX_IOPATTERN_OUT_VIDEO_MEMORY;

     }

+    par.ExtParam    = s->ext_buffers;

+    par.NumExtParam = s->num_ext_buffers;

+

     par.AsyncDepth = 1;    // TODO async

     par.vpp.In = hw_frames_hwctx->surfaces[0].Info;

@@ -534,6 +545,9 @@ static int qsvdeint_request_frame(AVFilterLink *outlink)

 #define OFFSET(x) offsetof(QSVDeintContext, x)

 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM

 static const AVOption options[] = {

+    { "mode", "set deinterlace mode", OFFSET(mode),   AV_OPT_TYPE_INT, {.i64 = MFX_DEINTERLACING_ADVANCED}, MFX_DEINTERLACING_BOB, MFX_DEINTERLACING_ADVANCED, FLAGS, "mode"},

+    { "bob",   "bob algorithm",                  0, AV_OPT_TYPE_CONST,      {.i64 = MFX_DEINTERLACING_BOB}, MFX_DEINTERLACING_BOB, MFX_DEINTERLACING_ADVANCED, FLAGS, "mode"},

+    { "advanced", "Motion adaptive algorithm",   0, AV_OPT_TYPE_CONST, {.i64 = MFX_DEINTERLACING_ADVANCED}, MFX_DEINTERLACING_BOB, MFX_DEINTERLACING_ADVANCED, FLAGS, "mode"},

     { NULL },

 };