path: root/include/media/videobuf2-core.h
diff options
authorKamil Debski <k.debski@samsung.com>2015-02-23 09:26:17 -0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-04-10 09:46:07 -0300
commitf61bf13b6a07a93b9348e77808d369803f40b681 (patch)
tree44ab9d2d33ff1c70cc3d5798a70a913b342737e6 /include/media/videobuf2-core.h
parent06e7a9b638467fddf8f62ca9f07adc7754319461 (diff)
[media] vb2: add allow_zero_bytesused flag to the vb2_queue struct
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>
Diffstat (limited to 'include/media/videobuf2-core.h')
1 files changed, 2 insertions, 0 deletions
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index e49dc6b0de81..a5790fd5d125 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -337,6 +337,7 @@ struct v4l2_fh;
* @io_modes: supported io methods (see vb2_io_modes enum)
* @fileio_read_once: report EOF after reading the first buffer
* @fileio_write_immediately: queue buffer after each write() call
+ * @allow_zero_bytesused: allow bytesused == 0 to be passed to the driver
* @lock: pointer to a mutex that protects the vb2_queue struct. The
* driver can set this to a mutex to let the v4l2 core serialize
* the queuing ioctls. If the driver wants to handle locking
@@ -388,6 +389,7 @@ struct vb2_queue {
unsigned int io_modes;
unsigned fileio_read_once:1;
unsigned fileio_write_immediately:1;
+ unsigned allow_zero_bytesused:1;
struct mutex *lock;
struct v4l2_fh *owner;

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