diff options
| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2010-10-02 11:06:05 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-10-21 01:18:20 -0200 |
| commit | 650b95feee353305203724cb2e8b2bc50f6d130a (patch) | |
| tree | 0649923ba63f58ef9eb0d28d463a23ac12a586d1 /drivers/media/video/uvc/uvc_queue.c | |
| parent | 9bb7262de9c077ccccb129f47d128edb7af5f92e (diff) | |
[media] uvcvideo: Generate discontinuous sequence numbers when frames are lost
Increase the sequence number of the v4l2_buffer structure regardless of
any buffer states, so that discontinuous sequence numbers allow
applications to detect lost video frames.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/uvc/uvc_queue.c')
| -rw-r--r-- | drivers/media/video/uvc/uvc_queue.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/drivers/media/video/uvc/uvc_queue.c b/drivers/media/video/uvc/uvc_queue.c index d27a315dcf06..ed6d5449741c 100644 --- a/drivers/media/video/uvc/uvc_queue.c +++ b/drivers/media/video/uvc/uvc_queue.c @@ -135,7 +135,6 @@ int uvc_alloc_buffers(struct uvc_video_queue *queue, unsigned int nbuffers, queue->buffer[i].buf.m.offset = i * bufsize; queue->buffer[i].buf.length = buflength; queue->buffer[i].buf.type = queue->type; - queue->buffer[i].buf.sequence = 0; queue->buffer[i].buf.field = V4L2_FIELD_NONE; queue->buffer[i].buf.memory = V4L2_MEMORY_MMAP; queue->buffer[i].buf.flags = 0; @@ -410,8 +409,7 @@ done: * state can be properly initialized before buffers are accessed from the * interrupt handler. * - * Enabling the video queue initializes parameters (such as sequence number, - * sync pattern, ...). If the queue is already enabled, return -EBUSY. + * Enabling the video queue returns -EBUSY if the queue is already enabled. * * Disabling the video queue cancels the queue and removes all buffers from * the main queue. @@ -430,7 +428,6 @@ int uvc_queue_enable(struct uvc_video_queue *queue, int enable) ret = -EBUSY; goto done; } - queue->sequence = 0; queue->flags |= UVC_QUEUE_STREAMING; queue->buf_used = 0; } else { @@ -510,8 +507,6 @@ struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue, nextbuf = NULL; spin_unlock_irqrestore(&queue->irqlock, flags); - buf->buf.sequence = queue->sequence++; - wake_up(&buf->wait); return nextbuf; } |