The vb2_queue_has_request() function will check whether a buffer has been prepared for the given request ID.
Signed-off-by: Laurent Pinchart <[email protected]> --- drivers/media/v4l2-core/videobuf2-v4l2.c | 17 +++++++++++++++++ include/media/videobuf2-v4l2.h | 2 ++ 2 files changed, 19 insertions(+) diff --git a/drivers/media/v4l2-core/videobuf2-v4l2.c b/drivers/media/v4l2-core/videobuf2-v4l2.c index 2c8776891535..0db7d67092ab 100644 --- a/drivers/media/v4l2-core/videobuf2-v4l2.c +++ b/drivers/media/v4l2-core/videobuf2-v4l2.c @@ -753,6 +753,23 @@ void vb2_queue_release(struct vb2_queue *q) } EXPORT_SYMBOL_GPL(vb2_queue_release); +bool vb2_queue_has_request(struct vb2_queue *q, unsigned int request) +{ + unsigned int i; + + for (i = 0; i < q->num_buffers; i++) { + struct vb2_buffer *vb = q->bufs[i]; + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + + if (vb->state == VB2_BUF_STATE_PREPARED && + vbuf->request == request) + return true; + } + + return false; +} +EXPORT_SYMBOL_GPL(vb2_queue_has_request); + /** * vb2_poll() - implements poll userspace operation * @q: videobuf2 queue diff --git a/include/media/videobuf2-v4l2.h b/include/media/videobuf2-v4l2.h index 48d6a34dcdb4..7cb428fc66ad 100644 --- a/include/media/videobuf2-v4l2.h +++ b/include/media/videobuf2-v4l2.h @@ -68,6 +68,8 @@ int vb2_streamoff(struct vb2_queue *q, enum v4l2_buf_type type); int __must_check vb2_queue_init(struct vb2_queue *q); void vb2_queue_release(struct vb2_queue *q); +bool vb2_queue_has_request(struct vb2_queue *q, unsigned int request); + unsigned int vb2_poll(struct vb2_queue *q, struct file *file, poll_table *wait); size_t vb2_read(struct vb2_queue *q, char __user *data, size_t count, loff_t *ppos, int nonblock); -- 2.4.10 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
