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| author | Philipp Zabel <philipp.zabel@gmail.com> | 2015-12-02 19:58:51 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-12-23 19:02:14 +0300 |
| commit | d4de047b536cc0fe06521eda111f4a31a0844e11 (patch) | |
| tree | a5f9ec09e18666b15ef566eedfb22ca9e07c8612 /drivers/media/platform/coda/coda-jpeg.c | |
| parent | 5542570ea9e7dfbd699dce3d542761926ef26712 (diff) | |
| download | linux-d4de047b536cc0fe06521eda111f4a31a0844e11.tar.xz | |
[media] coda: relax coda_jpeg_check_buffer for trailing bytes
coda_jpeg_check_buffer only cares about the buffer length and contents,
so change the parameter type back from v4l2_vb2_buffer to just the
vb2_buffer.
Instead of just checking the first and last bytes for the SOI and EOI
markers, relax the EOI marker check a bit and allow up to 32 trailing
bytes after the EOI marker as hardware generated JPEGs sometimes contain
some alignment overhead.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/platform/coda/coda-jpeg.c')
| -rw-r--r-- | drivers/media/platform/coda/coda-jpeg.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/drivers/media/platform/coda/coda-jpeg.c b/drivers/media/platform/coda/coda-jpeg.c index 96cd42a0baaf..9f899a6cefed 100644 --- a/drivers/media/platform/coda/coda-jpeg.c +++ b/drivers/media/platform/coda/coda-jpeg.c @@ -178,14 +178,28 @@ int coda_jpeg_write_tables(struct coda_ctx *ctx) return 0; } -bool coda_jpeg_check_buffer(struct coda_ctx *ctx, struct vb2_v4l2_buffer *vb) +bool coda_jpeg_check_buffer(struct coda_ctx *ctx, struct vb2_buffer *vb) { - void *vaddr = vb2_plane_vaddr(&vb->vb2_buf, 0); - u16 soi = be16_to_cpup((__be16 *)vaddr); - u16 eoi = be16_to_cpup((__be16 *)(vaddr + - vb2_get_plane_payload(&vb->vb2_buf, 0) - 2)); + void *vaddr = vb2_plane_vaddr(vb, 0); + u16 soi, eoi; + int len, i; + + soi = be16_to_cpup((__be16 *)vaddr); + if (soi != SOI_MARKER) + return false; + + len = vb2_get_plane_payload(vb, 0); + vaddr += len - 2; + for (i = 0; i < 32; i++) { + eoi = be16_to_cpup((__be16 *)(vaddr - i)); + if (eoi == EOI_MARKER) { + if (i > 0) + vb2_set_plane_payload(vb, 0, len - i); + return true; + } + } - return soi == SOI_MARKER && eoi == EOI_MARKER; + return false; } /* |