path: root/Documentation
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authorAlbert Wang <twang13@marvell.com>2012-08-01 02:45:41 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-08-15 19:24:28 -0300
commit991b3137f21e13db4711f313edbe67d49bed795b (patch)
tree7bbd81dc41e29a271b56bf1e22549fea5f77a1fe /Documentation
parentad5b987031835b0ac3064ef12209282277dbae54 (diff)
[media] media: soc_camera: don't clear pix->sizeimage in JPEG mode
In JPEG mode, the size of image is variable due to different JPEG compression rate. We only can get the pix->sizeimage from the user. If we clear pix->sizeimage in soc_camera_try_fmt() then we will get it from: ret = soc_mbus_image_size(xlate->host_fmt, pix->bytesperline, pix->height); if (ret < 0) return ret; pix->sizeimage = max_t(u32, pix->sizeimage, ret); In general, this sizeimage will be larger than the actul JPEG image size. But vb2 will check the buffer and size of image in __qbuf_userptr(): /* Check if the provided plane buffer is large enough */ if (planes[plane].length < q->plane_sizes[plane]) So we shouldn't clear the pix->sizeimage and also shouldn't re-calculate the pix->sizeimage in soc_mbus_image_size() in JPEG mode We also shouldn't re-calculate pix->bytesperline: ret = soc_mbus_bytes_per_line(pix->width, xlate->host_fmt); if (ret < 0) return ret; pix->bytesperline = max_t(u32, pix->bytesperline, ret); pix->bytesperline also should be set by the user or by the driver's try_fmt() implementation. Change-Id: I700690a2287346127a624b5260922eaa5427a596 Signed-off-by: Albert Wang <twang13@marvell.com> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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