diff options
| author | Lubomir Rintel <lkundrak@v3.sk> | 2013-07-02 12:56:39 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2013-07-26 15:30:36 +0200 |
| commit | f52dc448a344ddb90c8516c06656d62710baa869 (patch) | |
| tree | d4834131e91eb55a9fd37f7cdd787aad2bb0986e /drivers/media/usb | |
| parent | [media] usbtv: Fix deinterlacing (diff) | |
| download | linux-f52dc448a344ddb90c8516c06656d62710baa869.tar.xz linux-f52dc448a344ddb90c8516c06656d62710baa869.zip | |
[media] usbtv: Throw corrupted frames away
Ignore out of order data and mark incomplete buffers as errored.
This gets rid of annoying flicker due to occassional garbage from hardware.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-media@vger.kernel.org
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media/usb')
| -rw-r--r-- | drivers/media/usb/usbtv/usbtv.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/media/usb/usbtv/usbtv.c b/drivers/media/usb/usbtv/usbtv.c index 9dcc677f3015..91650173941a 100644 --- a/drivers/media/usb/usbtv/usbtv.c +++ b/drivers/media/usb/usbtv/usbtv.c @@ -89,6 +89,7 @@ struct usbtv { /* Number of currently processed frame, useful find * out when a new one begins. */ u32 frame_id; + int chunks_done; int iso_size; unsigned int sequence; @@ -242,8 +243,13 @@ static void usbtv_image_chunk(struct usbtv *usbtv, u32 *chunk) return; /* Beginning of a frame. */ - if (chunk_no == 0) + if (chunk_no == 0) { usbtv->frame_id = frame_id; + usbtv->chunks_done = 0; + } + + if (usbtv->frame_id != frame_id) + return; spin_lock_irqsave(&usbtv->buflock, flags); if (list_empty(&usbtv->bufs)) { @@ -258,16 +264,21 @@ static void usbtv_image_chunk(struct usbtv *usbtv, u32 *chunk) /* Copy the chunk data. */ usbtv_chunk_to_vbuf(frame, &chunk[1], chunk_no, odd); + usbtv->chunks_done++; /* Last chunk in a frame, signalling an end */ if (odd && chunk_no == USBTV_CHUNKS-1) { int size = vb2_plane_size(&buf->vb, 0); + enum vb2_buffer_state state = usbtv->chunks_done == + USBTV_CHUNKS ? + VB2_BUF_STATE_DONE : + VB2_BUF_STATE_ERROR; buf->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED; buf->vb.v4l2_buf.sequence = usbtv->sequence++; v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp); vb2_set_plane_payload(&buf->vb, 0, size); - vb2_buffer_done(&buf->vb, VB2_BUF_STATE_DONE); + vb2_buffer_done(&buf->vb, state); list_del(&buf->list); } |