Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit accf9b2c authored by Tony K Nadackal's avatar Tony K Nadackal Committed by Mauro Carvalho Chehab
Browse files

media: s5p-jpeg: Decode 4:1:1 chroma subsampling format 



This patch adds support for decoding 4:1:1 chroma subsampling in the
JPEG header parsing function.

Signed-off-by: default avatarTony K Nadackal <tony.kn@samsung.com>
Signed-off-by: default avatarThierry Escande <thierry.escande@collabora.com>
Acked-by: default avatarAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Acked-by: default avatarJacek Anaszewski <jacek.anaszewski@gmail.com>
Signed-off-by: default avatarSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent c8d36a80

drivers/media/platform/s5p-jpeg/jpeg-core.c

+15 −0
Original line number Diff line number Diff line
@@ -1099,6 +1099,8 @@ static void skip(struct s5p_jpeg_buffer *buf, long len) 
static bool s5p_jpeg_subsampling_decode(struct s5p_jpeg_ctx *ctx,

					unsigned int subsampling)

{

	unsigned int version;



	switch (subsampling) {

	case 0x11:

		ctx->subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_444;
@@ -1112,6 +1114,19 @@ static bool s5p_jpeg_subsampling_decode(struct s5p_jpeg_ctx *ctx, 
	case 0x33:

		ctx->subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY;

		break;

	case 0x41:

		/*

		 * 4:1:1 subsampling only supported by 3250, 5420, and 5433

		 * variants

		 */

		version = ctx->jpeg->variant->version;

		if (version != SJPEG_EXYNOS3250 &&

		    version != SJPEG_EXYNOS5420 &&

		    version != SJPEG_EXYNOS5433)

			return false;



		ctx->subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_411;

		break;

	default:

		return false;

	}