avfilter/vf_histogram: add support for 12bit yuva formats

libavfilter/vf_histogram.c

@@ -95,6 +95,7 @@ static const enum AVPixelFormat levels_in_pix_fmts[] = {
     AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
     AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
     AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
+    AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
     AV_PIX_FMT_GBRAP,    AV_PIX_FMT_GBRP,
     AV_PIX_FMT_GBRP9,    AV_PIX_FMT_GBRP10,  AV_PIX_FMT_GBRAP10,
     AV_PIX_FMT_GBRP12,   AV_PIX_FMT_GBRAP12,
@@ -118,7 +119,7 @@ static const enum AVPixelFormat levels_out_yuv10_pix_fmts[] = {
 };
 
 static const enum AVPixelFormat levels_out_yuv12_pix_fmts[] = {
-    AV_PIX_FMT_YUV444P12,
+    AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUV444P12,
     AV_PIX_FMT_NONE
 };