lkml.org 
[lkml]   [2017]   [Jun]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v4 5/8] [media] s5p-jpeg: Split s5p_jpeg_parse_hdr()
Date
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@collabora.com>
Acked-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.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
\
 
 \ /
  Last update: 2017-06-30 23:14    [W:0.077 / U:0.232 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site