[media] vb2: add allow_zero_bytesused flag to the vb2_queue struct

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The vb2: fix bytesused == 0 handling (8a75ffb) patch changed the behavior
of __fill_vb2_buffer function, so that if bytesused is 0 it is set to the
size of the buffer. However, bytesused set to 0 is used by older codec
drivers as as indication used to mark the end of stream.

To keep backward compatibility, this patch adds a flag passed to the
vb2_queue_init function - allow_zero_bytesused. If the flag is set upon
initialization of the queue, the videobuf2 keeps the value of bytesused
intact in the OUTPUT queue and passes it to the driver.

Reported-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

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This commit is contained in:

Kamil Debski 2015-02-23 09:26:17 -03:00 • committed by Mauro Carvalho Chehab

parent 06e7a9b638

commit f61bf13b6a

2 changed files with 35 additions and 6 deletions

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39

drivers/media/v4l2-core/videobuf2-core.c

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2

include/media/videobuf2-core.h

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