Messages in this thread Patch in this message | | | From | Paul Kocialkowski <> | Subject | [PATCH 4/9] media: v4l2: Add JPEG pixel format to v4l2 format info | Date | Fri, 24 Mar 2023 16:12:23 +0100 |
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Represent the JPEG pixel format in the v4l2 format info table.
Note that the bpp is set to 1 which is not a proper way to estimate the needed buffer size for a given JPEG image. However the compression ratios of JPEG typically allow fitting the image in a smaller size, even though extra metadata could increase the total size by an arbitrary amount. Thus it is not a perfectly safe way to calculate the size of a JPEG buffer for given dimensions but it still provides a reasonable approach.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> --- drivers/media/v4l2-core/v4l2-common.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c index 5101989716aa..8b2f201a8918 100644 --- a/drivers/media/v4l2-core/v4l2-common.c +++ b/drivers/media/v4l2-core/v4l2-common.c @@ -317,6 +317,9 @@ const struct v4l2_format_info *v4l2_format_info(u32 format) { .format = V4L2_PIX_FMT_SGBRG12, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_SGRBG12, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 }, { .format = V4L2_PIX_FMT_SRGGB12, .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 }, + + /* Compressed formats */ + { .format = V4L2_PIX_FMT_JPEG, .pixel_enc = V4L2_PIXEL_ENC_COMPRESSED, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 }, }; unsigned int i; -- 2.39.2
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