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| author | hans@localhost.localdomain <hans@localhost.localdomain> | 2008-08-03 14:35:38 +0200 |
|---|---|---|
| committer | hans@localhost.localdomain <hans@localhost.localdomain> | 2008-08-03 14:35:38 +0200 |
| commit | bad01ca943742b5a2938b3718abc8590a0f3929d (patch) | |
| tree | 9770fdfb8a93e5ebc599cfab1a37ca47dcdeef3a /v4l2-apps/lib/libv4l | |
| parent | 3dbcf4e987933e8e41ff496e76223f457a7609e5 (diff) | |
| download | mediapointer-dvb-s2-bad01ca943742b5a2938b3718abc8590a0f3929d.tar.gz mediapointer-dvb-s2-bad01ca943742b5a2938b3718abc8590a0f3929d.tar.bz2 | |
libv4l: mpa buffers before queuing
From: Hans de Goede <j.w.r.degoede@hhs.nl>
With some drivers the buffers must be mapped before queuing, so when
converting map the (real) buffers before calling the qbuf ioctl
Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Diffstat (limited to 'v4l2-apps/lib/libv4l')
| -rw-r--r-- | v4l2-apps/lib/libv4l/ChangeLog | 2 | ||||
| -rw-r--r-- | v4l2-apps/lib/libv4l/libv4l2/libv4l2.c | 5 |
2 files changed, 7 insertions, 0 deletions
diff --git a/v4l2-apps/lib/libv4l/ChangeLog b/v4l2-apps/lib/libv4l/ChangeLog index 45c9cca63..cdd29fac8 100644 --- a/v4l2-apps/lib/libv4l/ChangeLog +++ b/v4l2-apps/lib/libv4l/ChangeLog @@ -3,6 +3,8 @@ libv4l-0.4.0 * Be more relaxed in our checks for mixing read and mmap access, we were being more strict in this then certain kernel drivers (bttv) making xawtv unhappy +* With some drivers the buffers must be mapped before queuing, so when + converting map the (real) buffers before calling the qbuf ioctl * Add support for conversion to RGB24 (before we only supported BGR24) based on a patch by Jean-Francois Moine * Various Makefile and pkgconfig file improvements by Gregor Jasny (Debian) diff --git a/v4l2-apps/lib/libv4l/libv4l2/libv4l2.c b/v4l2-apps/lib/libv4l/libv4l2/libv4l2.c index 2a0dd4837..d6a8a6d2a 100644 --- a/v4l2-apps/lib/libv4l/libv4l2/libv4l2.c +++ b/v4l2-apps/lib/libv4l/libv4l2/libv4l2.c @@ -798,6 +798,11 @@ int v4l2_ioctl (int fd, unsigned long int request, ...) if ((result = v4l2_deactivate_read_stream(index))) break; + /* With some drivers the buffers must be mapped before queuing */ + if (converting) + if ((result = v4l2_map_buffers(index))) + break; + result = syscall(SYS_ioctl, devices[index].fd, VIDIOC_QBUF, arg); break; |