lavfi/vf_vpp_qsv: add has_passthrough flag in VPPContext

QSV filters may set this flag in preinit callback to turn on / off pass
through mode

This is in preparation for reusing the code for other QSV filters. E.g.
scale_qsv filter doesn't support pass through mode.

Signed-off-by: Haihao Xiang <haihao.xiang@intel.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/libavfilter/vf_vpp_qsv.c b/libavfilter/vf_vpp_qsv.c
index 2a7b06fa33..b04307b644 100644
--- a/libavfilter/vf_vpp_qsv.c
+++ b/libavfilter/vf_vpp_qsv.c
@@ -102,6 +102,7 @@ typedef struct VPPContext{
 
     int async_depth;
     int eof;
+    int has_passthrough;        /* apply pass through mode if possible */
 } VPPContext;
 
 static const AVOption options[] = {
@@ -269,6 +270,8 @@ static av_cold int vpp_preinit(AVFilterContext *ctx)
     vpp->contrast = 1.0;
     vpp->transpose = -1;
 
+    vpp->has_passthrough = 1;
+
     return 0;
 }
 
@@ -552,7 +555,8 @@ static int config_output(AVFilterLink *outlink)
 
     if (vpp->use_frc || vpp->use_crop || vpp->deinterlace || vpp->denoise ||
         vpp->detail || vpp->procamp || vpp->rotate || vpp->hflip ||
-        inlink->w != outlink->w || inlink->h != outlink->h || in_format != vpp->out_format)
+        inlink->w != outlink->w || inlink->h != outlink->h || in_format != vpp->out_format ||
+        !vpp->has_passthrough)
         return ff_qsvvpp_create(ctx, &vpp->qsv, &param);
     else {
         av_log(ctx, AV_LOG_VERBOSE, "qsv vpp pass through mode.\n");