summaryrefslogtreecommitdiffstats
path: root/drivers/media/platform/s5p-jpeg
diff options
context:
space:
mode:
authorThierry Escande <thierry.escande@collabora.com>2017-06-30 10:15:44 -0400
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2017-07-26 08:31:10 -0400
commitc8d36a80352efd00088ec0e693636c5ac8ca94e8 (patch)
treed5481d4525711947a9d8973d7d93c4904d80e2da /drivers/media/platform/s5p-jpeg
parent14a2de14dc0619bf926c56cd12e29e0245d12abc (diff)
downloadlinux-c8d36a80352efd00088ec0e693636c5ac8ca94e8.tar.bz2
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@collabora.com> Acked-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/platform/s5p-jpeg')
-rw-r--r--drivers/media/platform/s5p-jpeg/jpeg-core.c42
1 files 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 e9ff9773ad32..21ba3b4f397c 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;