vl: reintroduce PIPE_VIDEO_CAP_PREFERED_FORMAT

Create the video buffers in the format the driver preffers.
This temporary creates problems with decoder less VDPAU video playback.

Signed-off-by: Christian König <deathsimple@vodafone.de>

src/gallium/drivers/nouveau/nouveau_video.c

@@ -835,6 +835,8 @@ nouveau_screen_get_video_param(struct pipe_screen *pscreen,
    case PIPE_VIDEO_CAP_MAX_WIDTH:
    case PIPE_VIDEO_CAP_MAX_HEIGHT:
       return vl_video_buffer_max_size(pscreen);
+   case PIPE_VIDEO_CAP_PREFERED_FORMAT:
+      return PIPE_FORMAT_NV12;
    default:
       debug_printf("unknown video param: %d\n", param);
       return 0;

src/gallium/drivers/nvfx/nvfx_screen.c

@@ -230,6 +230,8 @@ nvfx_screen_get_video_param(struct pipe_screen *screen,
 	case PIPE_VIDEO_CAP_MAX_WIDTH:
 	case PIPE_VIDEO_CAP_MAX_HEIGHT:
 		return vl_video_buffer_max_size(screen);
+	case PIPE_VIDEO_CAP_PREFERED_FORMAT:
+		return PIPE_FORMAT_NV12;
 	default:
 		return 0;
 	}

src/gallium/drivers/r300/r300_screen.c

@@ -307,6 +307,8 @@ static int r300_get_video_param(struct pipe_screen *screen,
       case PIPE_VIDEO_CAP_MAX_WIDTH:
       case PIPE_VIDEO_CAP_MAX_HEIGHT:
          return vl_video_buffer_max_size(screen);
+      case PIPE_VIDEO_CAP_PREFERED_FORMAT:
+         return PIPE_FORMAT_NV12;
       default:
          return 0;
    }

src/gallium/drivers/r600/r600_pipe.c

@@ -526,6 +526,8 @@ static int r600_get_video_param(struct pipe_screen *screen,
 	case PIPE_VIDEO_CAP_MAX_WIDTH:
 	case PIPE_VIDEO_CAP_MAX_HEIGHT:
 		return vl_video_buffer_max_size(screen);
+	case PIPE_VIDEO_CAP_PREFERED_FORMAT:
+		return PIPE_FORMAT_NV12;
 	default:
 		return 0;
 	}

src/gallium/drivers/softpipe/sp_screen.c

@@ -201,6 +201,8 @@ softpipe_get_video_param(struct pipe_screen *screen,
    case PIPE_VIDEO_CAP_MAX_WIDTH:
    case PIPE_VIDEO_CAP_MAX_HEIGHT:
       return vl_video_buffer_max_size(screen);
+   case PIPE_VIDEO_CAP_PREFERED_FORMAT:
+      return PIPE_FORMAT_NV12;
    default:
       return 0;
    }

src/gallium/include/pipe/p_video_enums.h

@@ -50,7 +50,8 @@ enum pipe_video_cap
    PIPE_VIDEO_CAP_SUPPORTED = 0,
    PIPE_VIDEO_CAP_NPOT_TEXTURES = 1,
    PIPE_VIDEO_CAP_MAX_WIDTH = 2,
-   PIPE_VIDEO_CAP_MAX_HEIGHT = 3
+   PIPE_VIDEO_CAP_MAX_HEIGHT = 3,
+   PIPE_VIDEO_CAP_PREFERED_FORMAT = 4
 };
 
 enum pipe_video_codec

src/gallium/state_trackers/vdpau/surface.c

@@ -74,7 +74,12 @@ vlVdpVideoSurfaceCreate(VdpDevice device, VdpChromaType chroma_type,
 
    p_surf->device = dev;
    memset(&tmpl, 0, sizeof(tmpl));
-   tmpl.buffer_format = PIPE_FORMAT_YV12;
+   tmpl.buffer_format = dev->context->pipe->screen->get_video_param
+   (
+      dev->context->pipe->screen,
+      PIPE_VIDEO_PROFILE_UNKNOWN,
+      PIPE_VIDEO_CAP_PREFERED_FORMAT
+   );
    tmpl.chroma_format = ChromaToPipe(chroma_type);
    tmpl.width = width;
    tmpl.height = height;

src/gallium/state_trackers/xorg/xvmc/surface.c

@@ -175,7 +175,12 @@ Status XvMCCreateSurface(Display *dpy, XvMCContext *context, XvMCSurface *surfac
       return BadAlloc;
 
    memset(&tmpl, 0, sizeof(tmpl));
-   tmpl.buffer_format = PIPE_FORMAT_NV12;
+   tmpl.buffer_format = pipe->screen->get_video_param
+   (
+      pipe->screen,
+      PIPE_VIDEO_PROFILE_MPEG2_MAIN,
+      PIPE_VIDEO_CAP_PREFERED_FORMAT
+   );
    tmpl.chroma_format = context_priv->decoder->chroma_format;
    tmpl.width = context_priv->decoder->width;
    tmpl.height = context_priv->decoder->height;