[FFmpeg-devel] [PATCH 2/2] avfilter/vf_zscale: add support for grayscale formats

From: James Almer <jamrial@gmail.com>
To: ffmpeg-devel@ffmpeg.org
Subject: [FFmpeg-devel] [PATCH 2/2] avfilter/vf_zscale: add support for grayscale formats
Date: Mon, 17 Mar 2025 00:31:44 -0300
Message-ID: <20250317033144.1861-1-jamrial@gmail.com> (raw)
In-Reply-To: <20250317024833.1242-1-jamrial@gmail.com>

Signed-off-by: James Almer <jamrial@gmail.com>
---
 libavfilter/vf_zscale.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/libavfilter/vf_zscale.c b/libavfilter/vf_zscale.c
index 5fe6e555e7..d913f7d99c 100644
--- a/libavfilter/vf_zscale.c
+++ b/libavfilter/vf_zscale.c
@@ -206,11 +206,12 @@ static int query_formats(const AVFilterContext *ctx,
         AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
         AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA422P12,
         AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
+        AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10,
         AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
         AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
         AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP14, AV_PIX_FMT_GBRAP16,
-        AV_PIX_FMT_GBRPF16, AV_PIX_FMT_GBRAPF16,
-        AV_PIX_FMT_GBRPF32, AV_PIX_FMT_GBRAPF32,
+        AV_PIX_FMT_GRAYF16, AV_PIX_FMT_GBRPF16, AV_PIX_FMT_GBRAPF16,
+        AV_PIX_FMT_GRAYF32, AV_PIX_FMT_GBRPF32, AV_PIX_FMT_GBRAPF32,
         AV_PIX_FMT_NONE
     };
     int ret;
@@ -585,7 +586,8 @@ static void format_init(zimg_image_format *format, AVFrame *frame, const AVPixFm
     format->depth = desc->comp[0].depth;
     format->pixel_type = (desc->flags & AV_PIX_FMT_FLAG_FLOAT) ? (desc->comp[0].depth > 16 ? ZIMG_PIXEL_FLOAT : ZIMG_PIXEL_HALF)
                                                                : (desc->comp[0].depth > 8  ? ZIMG_PIXEL_WORD  : ZIMG_PIXEL_BYTE);
-    format->color_family = (desc->flags & AV_PIX_FMT_FLAG_RGB) ? ZIMG_COLOR_RGB : ZIMG_COLOR_YUV;
+    format->color_family = (desc->flags & AV_PIX_FMT_FLAG_RGB) ? ZIMG_COLOR_RGB
+                                                               : (desc->nb_components > 1 ? ZIMG_COLOR_YUV : ZIMG_COLOR_GREY);
     format->matrix_coefficients = (desc->flags & AV_PIX_FMT_FLAG_RGB) ? ZIMG_MATRIX_RGB : colorspace == -1 ? convert_matrix(frame->colorspace) : colorspace;
     format->color_primaries = primaries == -1 ? convert_primaries(frame->color_primaries) : primaries;
     format->transfer_characteristics = transfer == -1 ? convert_trc(frame->color_trc) : transfer;
@@ -738,14 +740,18 @@ static int filter_slice(AVFilterContext *ctx, void *data, int job_nr, int n_jobs
 
         p = td->desc->comp[i].plane;
 
+        if (i < td->desc->nb_components) {
         src_buf.plane[i].data = td->in->data[p];
         src_buf.plane[i].stride = td->in->linesize[p];
         src_buf.plane[i].mask = -1;
+        }
 
         p = td->odesc->comp[i].plane;
+        if (i < td->odesc->nb_components) {
         dst_buf.plane[i].data = td->out->data[p] + td->out->linesize[p] * (out_slice_start >> vsamp);
         dst_buf.plane[i].stride = td->out->linesize[p];
         dst_buf.plane[i].mask = -1;
+        }
     }
     if (!s->graph[job_nr])
         return AVERROR(EINVAL);
-- 
2.48.1

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