Fix a race condition in VAAPI CSC to YUV420P

Signed-off-by: nyanmisaka <nst799610810@gmail.com>

debian/patches/0084-fix-a-race-condition-in-vaapi-csc-to-yuv420p.patch

@@ -0,0 +1,58 @@
+Index: FFmpeg/libavutil/hwcontext_vaapi.c
+===================================================================
+--- FFmpeg.orig/libavutil/hwcontext_vaapi.c
++++ FFmpeg/libavutil/hwcontext_vaapi.c
+@@ -72,6 +72,7 @@ typedef struct VAAPIDevicePriv {
+ typedef struct VAAPISurfaceFormat {
+     enum AVPixelFormat pix_fmt;
+     VAImageFormat image_format;
++    unsigned int fourcc;
+ } VAAPISurfaceFormat;
+
+ typedef struct VAAPIDeviceContext {
+@@ -221,15 +222,21 @@ static int vaapi_get_image_format(AVHWDe
+                                   VAImageFormat **image_format)
+ {
+     VAAPIDeviceContext *ctx = hwdev->hwctx;
++    const VAAPIFormatDescriptor *desc;
+     int i;
+
++    desc = vaapi_format_from_pix_fmt(pix_fmt);
++    if (!desc || !image_format)
++        goto fail;
++
+     for (i = 0; i < ctx->nb_formats; i++) {
+-        if (ctx->formats[i].pix_fmt == pix_fmt) {
+-            if (image_format)
+-                *image_format = &ctx->formats[i].image_format;
++        if (ctx->formats[i].fourcc == desc->fourcc) {
++            *image_format = &ctx->formats[i].image_format;
+             return 0;
+         }
+     }
++
++fail:
+     return AVERROR(ENOSYS);
+ }
+
+@@ -446,6 +453,7 @@ static int vaapi_device_init(AVHWDeviceC
+             av_log(hwdev, AV_LOG_DEBUG, "Format %#x -> %s.\n",
+                    fourcc, av_get_pix_fmt_name(pix_fmt));
+             ctx->formats[ctx->nb_formats].pix_fmt      = pix_fmt;
++            ctx->formats[ctx->nb_formats].fourcc       = fourcc;
+             ctx->formats[ctx->nb_formats].image_format = image_list[i];
+             ++ctx->nb_formats;
+         }
+@@ -1022,12 +1030,6 @@ static int vaapi_map_to_memory(AVHWFrame
+ {
+     int err;
+
+-    if (dst->format != AV_PIX_FMT_NONE) {
+-        err = vaapi_get_image_format(hwfc->device_ctx, dst->format, NULL);
+-        if (err < 0)
+-            return err;
+-    }
+-
+     err = vaapi_map_frame(hwfc, dst, src, flags);
+     if (err)
+         return err;

debian/patches/series

@@ -81,3 +81,4 @@
 0081-backport-av1-videotoolbox.patch
 0082-fix-ass-incorrect-null-copy.patch
 0083-default-to-input-timebase-for-streamcopy.patch
+0084-fix-a-race-condition-in-vaapi-csc-to-yuv420p.patch