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media: s5p-jpeg: Split s5p_jpeg_parse_hdr()

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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>
This commit is contained in:
Thierry Escande 2017-06-30 10:15:44 -04:00 committed by Mauro Carvalho Chehab
parent 14a2de14dc
commit c8d36a8035
1 changed files with 24 additions and 18 deletions
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42
drivers/media/platform/s5p-jpeg/jpeg-core.c
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@ -1096,6 +1096,29 @@ static void skip(struct s5p_jpeg_buffer *buf, long len)
get_byte(buf); 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, static bool s5p_jpeg_parse_hdr(struct s5p_jpeg_q_data *result,
unsigned long buffer, unsigned long size, unsigned long buffer, unsigned long size,
struct s5p_jpeg_ctx *ctx) 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; 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->w = width;
result->h = height; result->h = height;
result->sos = sos; result->sos = sos;