Messages in this thread Patch in this message | | | From | Thierry Escande <> | Subject | [PATCH v3 6/8] [media] s5p-jpeg: Decode 4:1:1 chroma subsampling format | Date | Tue, 27 Jun 2017 18:08:52 +0200 |
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From: Tony K Nadackal <tony.kn@samsung.com>
This patch adds support for decoding 4:1:1 chroma subsampling in the jpeg header parsing function.
Signed-off-by: Tony K Nadackal <tony.kn@samsung.com> Signed-off-by: Thierry Escande <thierry.escande@collabora.com> --- drivers/media/platform/s5p-jpeg/jpeg-core.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c index 0783809..cca0fb8 100644 --- a/drivers/media/platform/s5p-jpeg/jpeg-core.c +++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c @@ -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; } -- 2.7.4
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