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Message-Id: <1498579734-1594-6-git-send-email-thierry.escande@collabora.com>
Date: Tue, 27 Jun 2017 18:08:51 +0200
From: Thierry Escande <thierry.escande@...labora.com>
To: Andrzej Pietrasiewicz <andrzej.p@...sung.com>,
Jacek Anaszewski <jacek.anaszewski@...il.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 5/8] [media] s5p-jpeg: Split s5p_jpeg_parse_hdr()
This patch moves the subsampling value decoding read from the jpeg
header into its own function. This new function is called
s5p_jpeg_subsampling_decode() and returns true if it successfully
decodes the subsampling value, false otherwise.
Signed-off-by: Thierry Escande <thierry.escande@...labora.com>
---
drivers/media/platform/s5p-jpeg/jpeg-core.c | 42 ++++++++++++++++-------------
1 file changed, 24 insertions(+), 18 deletions(-)
diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c
index 1769744..0783809 100644
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
@@ -1096,6 +1096,29 @@ static void skip(struct s5p_jpeg_buffer *buf, long len)
get_byte(buf);
}
+static bool s5p_jpeg_subsampling_decode(struct s5p_jpeg_ctx *ctx,
+ unsigned int subsampling)
+{
+ switch (subsampling) {
+ case 0x11:
+ ctx->subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_444;
+ break;
+ case 0x21:
+ ctx->subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_422;
+ break;
+ case 0x22:
+ ctx->subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_420;
+ break;
+ case 0x33:
+ ctx->subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY;
+ break;
+ default:
+ return false;
+ }
+
+ return true;
+}
+
static bool s5p_jpeg_parse_hdr(struct s5p_jpeg_q_data *result,
unsigned long buffer, unsigned long size,
struct s5p_jpeg_ctx *ctx)
@@ -1207,26 +1230,9 @@ static bool s5p_jpeg_parse_hdr(struct s5p_jpeg_q_data *result,
}
}
- if (notfound || !sos)
+ if (notfound || !sos || !s5p_jpeg_subsampling_decode(ctx, subsampling))
return false;
- switch (subsampling) {
- case 0x11:
- ctx->subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_444;
- break;
- case 0x21:
- ctx->subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_422;
- break;
- case 0x22:
- ctx->subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_420;
- break;
- case 0x33:
- ctx->subsampling = V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY;
- break;
- default:
- return false;
- }
-
result->w = width;
result->h = height;
result->sos = sos;
--
2.7.4
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