vo_vdpau: Add support for high-quality scaling feature

Part of the code is currently under #ifdef to allow compilation with
older VDPAU library versions; that can be removed later.

Partially based on a patch by Carl Eugen Hoyos.

DOCS/man/en/mplayer.1

@@ -3462,6 +3462,13 @@ Use ITU-R BT.709 color space.
 .IPs 3
 Use SMPTE-240M color space.
 .RE
+IPs hqscaling
+.RSss
+.IPs 0
+Use default VDPAU scaling (default).
+.IPs 1\-9
+Apply high quality VDPAU scaling (needs capable hardware).
+.RE
 .IPs fps=<number>
 Override autodetected display refresh rate value (the value is needed for framedrop to allow video playback rates higher than display refresh rate, and for vsync-aware frame timing adjustments).
 Default 0 means use autodetected value.

TOOLS/vdpau_functions.py

@@ -31,6 +31,7 @@ presentation_queue_target_create_x11
 presentation_queue_target_destroy
 video_mixer_create
 video_mixer_destroy
+video_mixer_query_feature_support
 video_mixer_render
 video_mixer_set_attribute_values
 video_mixer_set_feature_enables

libvo/vdpau_template.c

@@ -33,6 +33,7 @@ VDP_FUNCTION(VdpPresentationQueueTargetCreateX11, VDP_FUNC_ID_PRESENTATION_QUEUE
 VDP_FUNCTION(VdpPresentationQueueTargetDestroy, VDP_FUNC_ID_PRESENTATION_QUEUE_TARGET_DESTROY, presentation_queue_target_destroy)
 VDP_FUNCTION(VdpVideoMixerCreate, VDP_FUNC_ID_VIDEO_MIXER_CREATE, video_mixer_create)
 VDP_FUNCTION(VdpVideoMixerDestroy, VDP_FUNC_ID_VIDEO_MIXER_DESTROY, video_mixer_destroy)
+VDP_FUNCTION(VdpVideoMixerQueryFeatureSupport, VDP_FUNC_ID_VIDEO_MIXER_QUERY_FEATURE_SUPPORT, video_mixer_query_feature_support)
 VDP_FUNCTION(VdpVideoMixerRender, VDP_FUNC_ID_VIDEO_MIXER_RENDER, video_mixer_render)
 VDP_FUNCTION(VdpVideoMixerSetAttributeValues, VDP_FUNC_ID_VIDEO_MIXER_SET_ATTRIBUTE_VALUES, video_mixer_set_attribute_values)
 VDP_FUNCTION(VdpVideoMixerSetFeatureEnables, VDP_FUNC_ID_VIDEO_MIXER_SET_FEATURE_ENABLES, video_mixer_set_feature_enables)

libvo/vo_vdpau.c

@@ -132,6 +132,7 @@ struct vdpctx {
     int                                pullup;
     float                              denoise;
     float                              sharpen;
+    int                                hqscaling;
     int                                chroma_deint;
     int                                top_field_first;
     bool                               flip;
@@ -576,7 +577,7 @@ static int create_vdp_mixer(struct vo *vo, VdpChromaType vdp_chroma_type)
     struct vdpctx *vc = vo->priv;
     struct vdp_functions *vdp = vc->vdp;
 #define VDP_NUM_MIXER_PARAMETER 3
-#define MAX_NUM_FEATURES 5
+#define MAX_NUM_FEATURES 6
     int i;
     VdpStatus vdp_st;
 
@@ -616,6 +617,25 @@ static int create_vdp_mixer(struct vo *vo, VdpChromaType vdp_chroma_type)
         features[feature_count++] = VDP_VIDEO_MIXER_FEATURE_NOISE_REDUCTION;
     if (vc->sharpen)
         features[feature_count++] = VDP_VIDEO_MIXER_FEATURE_SHARPNESS;
+    if (vc->hqscaling) {
+#ifndef VDP_VIDEO_MIXER_FEATURE_HIGH_QUALITY_SCALING_L1
+        mp_msg(MSGT_VO, MSGL_ERR, "[vdpau] MPlayer was compiled with (old?)"
+               "libvdpau headers with no support for requested hqscaling.\n");
+#else
+        VdpVideoMixerFeature hqscaling_feature =
+            VDP_VIDEO_MIXER_FEATURE_HIGH_QUALITY_SCALING_L1 + vc->hqscaling-1;
+        VdpBool hqscaling_available;
+        vdp_st = vdp->video_mixer_query_feature_support(vc->vdp_device,
+                                                        hqscaling_feature,
+                                                        &hqscaling_available);
+        CHECK_ST_ERROR("Error when calling video_mixer_query_feature_support");
+        if (hqscaling_available)
+            features[feature_count++] = hqscaling_feature;
+        else
+            mp_msg(MSGT_VO, MSGL_ERR, "[vdpau] Your hardware or VDPAU "
+                   "library does not support requested hqscaling.\n");
+    }
+#endif
 
     vdp_st = vdp->video_mixer_create(vc->vdp_device, feature_count, features,
                                      VDP_NUM_MIXER_PARAMETER,
@@ -1592,10 +1612,12 @@ static int preinit(struct vo *vo, const char *arg)
         {"denoise", OPT_ARG_FLOAT, &vc->denoise, NULL},
         {"sharpen", OPT_ARG_FLOAT, &vc->sharpen, NULL},
         {"colorspace", OPT_ARG_INT, &vc->user_colorspace, NULL},
+        {"hqscaling", OPT_ARG_INT, &vc->hqscaling, NULL},
         {"fps",     OPT_ARG_FLOAT, &vc->user_fps, NULL},
         {NULL}
     };
-    if (subopt_parse(arg, subopts) != 0) {
+    if (subopt_parse(arg, subopts) != 0 || vc->hqscaling < 0
+        || vc->hqscaling > 9) {
         mp_msg(MSGT_VO, MSGL_FATAL, help_msg);
         return -1;
     }