* [PATCH v2] [media] uvcvideo: Add quirk to force the Oculus DK2 IR tracker to grayscale
@ 2014-08-06 20:50 Philipp Zabel
2014-09-29 19:38 ` Philipp Zabel
0 siblings, 1 reply; 5+ messages in thread
From: Philipp Zabel @ 2014-08-06 20:50 UTC (permalink / raw)
To: Laurent Pinchart; +Cc: linux-media, Philipp Zabel
This patch adds a quirk to force Y8 pixel format even if the camera reports
half-width YUYV.
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
---
drivers/media/usb/uvc/uvc_driver.c | 29 ++++++++++++++++++++++++++++-
drivers/media/usb/uvc/uvcvideo.h | 1 +
2 files changed, 29 insertions(+), 1 deletion(-)
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index c3bb250..90a8f10 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -311,6 +311,7 @@ static int uvc_parse_format(struct uvc_device *dev,
struct uvc_format_desc *fmtdesc;
struct uvc_frame *frame;
const unsigned char *start = buffer;
+ bool force_yuy2_to_y8 = false;
unsigned int interval;
unsigned int i, n;
__u8 ftype;
@@ -333,6 +334,22 @@ static int uvc_parse_format(struct uvc_device *dev,
/* Find the format descriptor from its GUID. */
fmtdesc = uvc_format_by_guid(&buffer[5]);
+ format->bpp = buffer[21];
+
+ if (dev->quirks & UVC_QUIRK_FORCE_Y8) {
+ if (fmtdesc && fmtdesc->fcc == V4L2_PIX_FMT_YUYV &&
+ format->bpp == 16) {
+ force_yuy2_to_y8 = true;
+ fmtdesc = &uvc_fmts[9];
+ format->bpp = 8;
+ } else {
+ uvc_printk(KERN_WARNING,
+ "Forcing %d-bit %s to %s not supported",
+ format->bpp, fmtdesc->name,
+ uvc_fmts[9].name);
+ }
+ }
+
if (fmtdesc != NULL) {
strlcpy(format->name, fmtdesc->name,
sizeof format->name);
@@ -345,7 +362,6 @@ static int uvc_parse_format(struct uvc_device *dev,
format->fcc = 0;
}
- format->bpp = buffer[21];
if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) {
ftype = UVC_VS_FRAME_UNCOMPRESSED;
} else {
@@ -455,6 +471,8 @@ static int uvc_parse_format(struct uvc_device *dev,
frame->bFrameIndex = buffer[3];
frame->bmCapabilities = buffer[4];
frame->wWidth = get_unaligned_le16(&buffer[5]);
+ if (force_yuy2_to_y8)
+ frame->wWidth *= 2;
frame->wHeight = get_unaligned_le16(&buffer[7]);
frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
@@ -2467,6 +2485,15 @@ static struct usb_device_id uvc_ids[] = {
.bInterfaceProtocol = 0,
.driver_info = UVC_QUIRK_PROBE_MINMAX
| UVC_QUIRK_IGNORE_SELECTOR_UNIT },
+ /* Oculus VR Positional Tracker DK2 */
+ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
+ | USB_DEVICE_ID_MATCH_INT_INFO,
+ .idVendor = 0x2833,
+ .idProduct = 0x0201,
+ .bInterfaceClass = USB_CLASS_VIDEO,
+ .bInterfaceSubClass = 1,
+ .bInterfaceProtocol = 0,
+ .driver_info = UVC_QUIRK_FORCE_Y8 },
/* Generic USB Video Class */
{ USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) },
{}
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 9e35982..1dd78c0 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -137,6 +137,7 @@
#define UVC_QUIRK_FIX_BANDWIDTH 0x00000080
#define UVC_QUIRK_PROBE_DEF 0x00000100
#define UVC_QUIRK_RESTRICT_FRAME_RATE 0x00000200
+#define UVC_QUIRK_FORCE_Y8 0x00000400
/* Format flags */
#define UVC_FMT_FLAG_COMPRESSED 0x00000001
--
2.0.1
^ permalink raw reply related [flat|nested] 5+ messages in thread* Re: [PATCH v2] [media] uvcvideo: Add quirk to force the Oculus DK2 IR tracker to grayscale
2014-08-06 20:50 [PATCH v2] [media] uvcvideo: Add quirk to force the Oculus DK2 IR tracker to grayscale Philipp Zabel
@ 2014-09-29 19:38 ` Philipp Zabel
2014-10-06 14:34 ` Laurent Pinchart
0 siblings, 1 reply; 5+ messages in thread
From: Philipp Zabel @ 2014-09-29 19:38 UTC (permalink / raw)
To: Laurent Pinchart; +Cc: Linux Media Mailing List, Philipp Zabel
Hi Laurent,
On Wed, Aug 6, 2014 at 10:50 PM, Philipp Zabel <philipp.zabel@gmail.com> wrote:
> This patch adds a quirk to force Y8 pixel format even if the camera reports
> half-width YUYV.
>
> Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
do you have any further comments on this patch?
regards
Philipp
> ---
> drivers/media/usb/uvc/uvc_driver.c | 29 ++++++++++++++++++++++++++++-
> drivers/media/usb/uvc/uvcvideo.h | 1 +
> 2 files changed, 29 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
> index c3bb250..90a8f10 100644
> --- a/drivers/media/usb/uvc/uvc_driver.c
> +++ b/drivers/media/usb/uvc/uvc_driver.c
> @@ -311,6 +311,7 @@ static int uvc_parse_format(struct uvc_device *dev,
> struct uvc_format_desc *fmtdesc;
> struct uvc_frame *frame;
> const unsigned char *start = buffer;
> + bool force_yuy2_to_y8 = false;
> unsigned int interval;
> unsigned int i, n;
> __u8 ftype;
> @@ -333,6 +334,22 @@ static int uvc_parse_format(struct uvc_device *dev,
> /* Find the format descriptor from its GUID. */
> fmtdesc = uvc_format_by_guid(&buffer[5]);
>
> + format->bpp = buffer[21];
> +
> + if (dev->quirks & UVC_QUIRK_FORCE_Y8) {
> + if (fmtdesc && fmtdesc->fcc == V4L2_PIX_FMT_YUYV &&
> + format->bpp == 16) {
> + force_yuy2_to_y8 = true;
> + fmtdesc = &uvc_fmts[9];
> + format->bpp = 8;
> + } else {
> + uvc_printk(KERN_WARNING,
> + "Forcing %d-bit %s to %s not supported",
> + format->bpp, fmtdesc->name,
> + uvc_fmts[9].name);
> + }
> + }
> +
> if (fmtdesc != NULL) {
> strlcpy(format->name, fmtdesc->name,
> sizeof format->name);
> @@ -345,7 +362,6 @@ static int uvc_parse_format(struct uvc_device *dev,
> format->fcc = 0;
> }
>
> - format->bpp = buffer[21];
> if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) {
> ftype = UVC_VS_FRAME_UNCOMPRESSED;
> } else {
> @@ -455,6 +471,8 @@ static int uvc_parse_format(struct uvc_device *dev,
> frame->bFrameIndex = buffer[3];
> frame->bmCapabilities = buffer[4];
> frame->wWidth = get_unaligned_le16(&buffer[5]);
> + if (force_yuy2_to_y8)
> + frame->wWidth *= 2;
> frame->wHeight = get_unaligned_le16(&buffer[7]);
> frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
> frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
> @@ -2467,6 +2485,15 @@ static struct usb_device_id uvc_ids[] = {
> .bInterfaceProtocol = 0,
> .driver_info = UVC_QUIRK_PROBE_MINMAX
> | UVC_QUIRK_IGNORE_SELECTOR_UNIT },
> + /* Oculus VR Positional Tracker DK2 */
> + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
> + | USB_DEVICE_ID_MATCH_INT_INFO,
> + .idVendor = 0x2833,
> + .idProduct = 0x0201,
> + .bInterfaceClass = USB_CLASS_VIDEO,
> + .bInterfaceSubClass = 1,
> + .bInterfaceProtocol = 0,
> + .driver_info = UVC_QUIRK_FORCE_Y8 },
> /* Generic USB Video Class */
> { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) },
> {}
> diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
> index 9e35982..1dd78c0 100644
> --- a/drivers/media/usb/uvc/uvcvideo.h
> +++ b/drivers/media/usb/uvc/uvcvideo.h
> @@ -137,6 +137,7 @@
> #define UVC_QUIRK_FIX_BANDWIDTH 0x00000080
> #define UVC_QUIRK_PROBE_DEF 0x00000100
> #define UVC_QUIRK_RESTRICT_FRAME_RATE 0x00000200
> +#define UVC_QUIRK_FORCE_Y8 0x00000400
>
> /* Format flags */
> #define UVC_FMT_FLAG_COMPRESSED 0x00000001
> --
> 2.0.1
>
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH v2] [media] uvcvideo: Add quirk to force the Oculus DK2 IR tracker to grayscale
2014-09-29 19:38 ` Philipp Zabel
@ 2014-10-06 14:34 ` Laurent Pinchart
2014-10-06 21:45 ` Philipp Zabel
0 siblings, 1 reply; 5+ messages in thread
From: Laurent Pinchart @ 2014-10-06 14:34 UTC (permalink / raw)
To: Philipp Zabel; +Cc: Linux Media Mailing List
Hi Philipp,
On Monday 29 September 2014 21:38:39 Philipp Zabel wrote:
> On Wed, Aug 6, 2014 at 10:50 PM, Philipp Zabel wrote:
> > This patch adds a quirk to force Y8 pixel format even if the camera
> > reports half-width YUYV.
> >
> > Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
>
> do you have any further comments on this patch?
Sorry for the late reply. Please see below for a couple of small comments.
> > ---
> >
> > drivers/media/usb/uvc/uvc_driver.c | 29 ++++++++++++++++++++++++++++-
> > drivers/media/usb/uvc/uvcvideo.h | 1 +
> > 2 files changed, 29 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/media/usb/uvc/uvc_driver.c
> > b/drivers/media/usb/uvc/uvc_driver.c index c3bb250..90a8f10 100644
> > --- a/drivers/media/usb/uvc/uvc_driver.c
> > +++ b/drivers/media/usb/uvc/uvc_driver.c
> > @@ -311,6 +311,7 @@ static int uvc_parse_format(struct uvc_device *dev,
> > struct uvc_format_desc *fmtdesc;
> > struct uvc_frame *frame;
> > const unsigned char *start = buffer;
> > + bool force_yuy2_to_y8 = false;
To keep things a bit more generic, how about an unsigned int width_multiplier
initialized to 1 and set to 2 when the quirk applies ?
> > unsigned int interval;
> > unsigned int i, n;
> > __u8 ftype;
> > @@ -333,6 +334,22 @@ static int uvc_parse_format(struct uvc_device *dev,
> >
> > /* Find the format descriptor from its GUID. */
> > fmtdesc = uvc_format_by_guid(&buffer[5]);
> > + format->bpp = buffer[21];
> > +
> > + if (dev->quirks & UVC_QUIRK_FORCE_Y8) {
> > + if (fmtdesc && fmtdesc->fcc == V4L2_PIX_FMT_YUYV
> > &&
> > + format->bpp == 16) {
I wonder if that check is really needed, all YUYV formats should have 16bpp.
> > + force_yuy2_to_y8 = true;
> > + fmtdesc = &uvc_fmts[9];
The hardcoded index here is hair-raising :-) How about something like the
following instead ?
}
format->bpp = buffer[21];
+
+ /* Some devices report a format that doesn't match what they
+ * really send.
+ */
+ if (dev->quirks & UVC_QUIRK_FORCE_Y8) {
+ if (format->fcc == V4L2_PIX_FMT_YUYV) {
+ strlcpy(format->name, "Greyscale 8-bit (Y8 )",
+ sizeof(format->name));
+ format->fcc = V4L2_PIX_FMT_GREY;
+ format->bpp = 8;
+ width_multiplier = 2;
+ }
+ }
+
if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) {
ftype = UVC_VS_FRAME_UNCOMPRESSED;
} else {
I know it duplicates the format string, but as we're trying to move them to
the V4L2 core anyway, I don't see that as being a big problem.
> > + format->bpp = 8;
> > + } else {
> > + uvc_printk(KERN_WARNING,
> > + "Forcing %d-bit %s to %s not
> > supported",
> > + format->bpp, fmtdesc->name,
> > + uvc_fmts[9].name);
> > + }
> > + }
> > +
> > if (fmtdesc != NULL) {
> > strlcpy(format->name, fmtdesc->name,
> > sizeof format->name);
> > @@ -345,7 +362,6 @@ static int uvc_parse_format(struct uvc_device *dev,
> > format->fcc = 0;
> > }
> >
> > - format->bpp = buffer[21];
> > if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) {
> > ftype = UVC_VS_FRAME_UNCOMPRESSED;
> > } else {
> > @@ -455,6 +471,8 @@ static int uvc_parse_format(struct uvc_device *dev,
> > frame->bFrameIndex = buffer[3];
> > frame->bmCapabilities = buffer[4];
> > frame->wWidth = get_unaligned_le16(&buffer[5]);
> > + if (force_yuy2_to_y8)
> > + frame->wWidth *= 2;
This would become
+ frame->wWidth = get_unaligned_le16(&buffer[5])
+ * width_multiplier;
If you're fine with that there's no need to resubmit, I'll modify the patch
when applying it to my tree.
> > frame->wHeight = get_unaligned_le16(&buffer[7]);
> > frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
> > frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
> > @@ -2467,6 +2485,15 @@ static struct usb_device_id uvc_ids[] = {
> > .bInterfaceProtocol = 0,
> > .driver_info = UVC_QUIRK_PROBE_MINMAX
> > | UVC_QUIRK_IGNORE_SELECTOR_UNIT },
> > + /* Oculus VR Positional Tracker DK2 */
> > + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
> > + | USB_DEVICE_ID_MATCH_INT_INFO,
> > + .idVendor = 0x2833,
> > + .idProduct = 0x0201,
> > + .bInterfaceClass = USB_CLASS_VIDEO,
> > + .bInterfaceSubClass = 1,
> > + .bInterfaceProtocol = 0,
> > + .driver_info = UVC_QUIRK_FORCE_Y8 },
> > /* Generic USB Video Class */
> > { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) },
> > {}
> > diff --git a/drivers/media/usb/uvc/uvcvideo.h
> > b/drivers/media/usb/uvc/uvcvideo.h index 9e35982..1dd78c0 100644
> > --- a/drivers/media/usb/uvc/uvcvideo.h
> > +++ b/drivers/media/usb/uvc/uvcvideo.h
> > @@ -137,6 +137,7 @@
> > #define UVC_QUIRK_FIX_BANDWIDTH 0x00000080
> > #define UVC_QUIRK_PROBE_DEF 0x00000100
> > #define UVC_QUIRK_RESTRICT_FRAME_RATE 0x00000200
> > +#define UVC_QUIRK_FORCE_Y8 0x00000400
> >
> > /* Format flags */
> > #define UVC_FMT_FLAG_COMPRESSED 0x00000001
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH v2] [media] uvcvideo: Add quirk to force the Oculus DK2 IR tracker to grayscale
2014-10-06 14:34 ` Laurent Pinchart
@ 2014-10-06 21:45 ` Philipp Zabel
2014-10-06 23:08 ` Laurent Pinchart
0 siblings, 1 reply; 5+ messages in thread
From: Philipp Zabel @ 2014-10-06 21:45 UTC (permalink / raw)
To: Laurent Pinchart; +Cc: Linux Media Mailing List
Hi Laurent,
On Mon, Oct 6, 2014 at 4:34 PM, Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
>> > @@ -311,6 +311,7 @@ static int uvc_parse_format(struct uvc_device *dev,
>> > struct uvc_format_desc *fmtdesc;
>> > struct uvc_frame *frame;
>> > const unsigned char *start = buffer;
>> > + bool force_yuy2_to_y8 = false;
>
> To keep things a bit more generic, how about an unsigned int width_multiplier
> initialized to 1 and set to 2 when the quirk applies ?
[...]
>> > @@ -333,6 +334,22 @@ static int uvc_parse_format(struct uvc_device *dev,
>> >
>> > /* Find the format descriptor from its GUID. */
>> > fmtdesc = uvc_format_by_guid(&buffer[5]);
>> > + format->bpp = buffer[21];
>> > +
>> > + if (dev->quirks & UVC_QUIRK_FORCE_Y8) {
>> > + if (fmtdesc && fmtdesc->fcc == V4L2_PIX_FMT_YUYV
>> > &&
>> > + format->bpp == 16) {
>
> I wonder if that check is really needed, all YUYV formats should have 16bpp.
>
>> > + force_yuy2_to_y8 = true;
>> > + fmtdesc = &uvc_fmts[9];
>
> The hardcoded index here is hair-raising :-) How about something like the
> following instead ?
>
> }
>
> format->bpp = buffer[21];
> +
> + /* Some devices report a format that doesn't match what they
> + * really send.
> + */
> + if (dev->quirks & UVC_QUIRK_FORCE_Y8) {
> + if (format->fcc == V4L2_PIX_FMT_YUYV) {
> + strlcpy(format->name, "Greyscale 8-bit (Y8 )",
> + sizeof(format->name));
> + format->fcc = V4L2_PIX_FMT_GREY;
> + format->bpp = 8;
> + width_multiplier = 2;
> + }
> + }
> +
> if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) {
> ftype = UVC_VS_FRAME_UNCOMPRESSED;
> } else {
>
> I know it duplicates the format string, but as we're trying to move them to
> the V4L2 core anyway, I don't see that as being a big problem.
[...]
>> > @@ -455,6 +471,8 @@ static int uvc_parse_format(struct uvc_device *dev,
>> > frame->bFrameIndex = buffer[3];
>> > frame->bmCapabilities = buffer[4];
>> > frame->wWidth = get_unaligned_le16(&buffer[5]);
>> > + if (force_yuy2_to_y8)
>> > + frame->wWidth *= 2;
>
> This would become
>
> + frame->wWidth = get_unaligned_le16(&buffer[5])
> + * width_multiplier;
>
> If you're fine with that there's no need to resubmit, I'll modify the patch
> when applying it to my tree.
Thank you, I'm fine with your suggested changes.
Especially the format setting part looks a lot more civilized now.
regards
Philipp
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH v2] [media] uvcvideo: Add quirk to force the Oculus DK2 IR tracker to grayscale
2014-10-06 21:45 ` Philipp Zabel
@ 2014-10-06 23:08 ` Laurent Pinchart
0 siblings, 0 replies; 5+ messages in thread
From: Laurent Pinchart @ 2014-10-06 23:08 UTC (permalink / raw)
To: Philipp Zabel; +Cc: Linux Media Mailing List
Hi Philipp,
On Monday 06 October 2014 23:45:54 Philipp Zabel wrote:
> On Mon, Oct 6, 2014 at 4:34 PM, Laurent Pinchart wrote:
> >> > @@ -311,6 +311,7 @@ static int uvc_parse_format(struct uvc_device *dev,
> >> > struct uvc_format_desc *fmtdesc;
> >> > struct uvc_frame *frame;
> >> > const unsigned char *start = buffer;
> >> > + bool force_yuy2_to_y8 = false;
> >
> > To keep things a bit more generic, how about an unsigned int
> > width_multiplier initialized to 1 and set to 2 when the quirk applies ?
>
> [...]
>
> >> > @@ -333,6 +334,22 @@ static int uvc_parse_format(struct uvc_device
> >> > *dev,
> >> >
> >> > /* Find the format descriptor from its GUID. */
> >> > fmtdesc = uvc_format_by_guid(&buffer[5]);
> >> >
> >> > + format->bpp = buffer[21];
> >> > +
> >> > + if (dev->quirks & UVC_QUIRK_FORCE_Y8) {
> >> > + if (fmtdesc && fmtdesc->fcc ==
> >> > V4L2_PIX_FMT_YUYV
> >> > &&
> >> > + format->bpp == 16) {
> >
> > I wonder if that check is really needed, all YUYV formats should have
> > 16bpp.
> >
> >> > + force_yuy2_to_y8 = true;
> >> > + fmtdesc = &uvc_fmts[9];
> >
> > The hardcoded index here is hair-raising :-) How about something like the
> > following instead ?
> >
> > }
> >
> > format->bpp = buffer[21];
> >
> > +
> > + /* Some devices report a format that doesn't match what
> > they
> > + * really send.
> > + */
> > + if (dev->quirks & UVC_QUIRK_FORCE_Y8) {
> > + if (format->fcc == V4L2_PIX_FMT_YUYV) {
> > + strlcpy(format->name, "Greyscale 8-bit (Y8
> > )",
> > + sizeof(format->name));
> > + format->fcc = V4L2_PIX_FMT_GREY;
> > + format->bpp = 8;
> > + width_multiplier = 2;
> > + }
> > + }
> > +
> >
> > if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) {
> > ftype = UVC_VS_FRAME_UNCOMPRESSED;
> > } else {
> >
> > I know it duplicates the format string, but as we're trying to move them
> > to the V4L2 core anyway, I don't see that as being a big problem.
>
> [...]
>
> >> > @@ -455,6 +471,8 @@ static int uvc_parse_format(struct uvc_device *dev,
> >> >
> >> > frame->bFrameIndex = buffer[3];
> >> > frame->bmCapabilities = buffer[4];
> >> > frame->wWidth = get_unaligned_le16(&buffer[5]);
> >> >
> >> > + if (force_yuy2_to_y8)
> >> > + frame->wWidth *= 2;
> >
> > This would become
> >
> > + frame->wWidth = get_unaligned_le16(&buffer[5])
> > + * width_multiplier;
> >
> > If you're fine with that there's no need to resubmit, I'll modify the
> > patch when applying it to my tree.
>
> Thank you, I'm fine with your suggested changes.
> Especially the format setting part looks a lot more civilized now.
Great. I'll add the patch to my next pull request. Thank you.
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 5+ messages in thread
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2014-08-06 20:50 [PATCH v2] [media] uvcvideo: Add quirk to force the Oculus DK2 IR tracker to grayscale Philipp Zabel
2014-09-29 19:38 ` Philipp Zabel
2014-10-06 14:34 ` Laurent Pinchart
2014-10-06 21:45 ` Philipp Zabel
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