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Revert "v4l2: poll the file descriptor"

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This reverts commit 0efd48dfd1.
Reason for the revert is that the code seems based on some
misunderstanding on how the code works.

Conflicts:

	libavdevice/v4l2.c

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-01-11 14:17:16 +01:00
parent 98dfdfdd8e
commit 106f714d30
1 changed files with 0 additions and 15 deletions
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15
libavdevice/v4l2.c
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@ -38,7 +38,6 @@
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <poll.h>
#if HAVE_SYS_VIDEOIO_H
#include <sys/videoio.h>
#else
@ -55,7 +54,6 @@
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/avstring.h"
#include "libavutil/mathematics.h"
#if CONFIG_LIBV4L2
#include <libv4l2.h>
@ -81,7 +79,6 @@ struct video_data {
int frame_format; /* V4L2_PIX_FMT_* */
int width, height;
int frame_size;
int timeout;
int interlaced;
int top_field_first;
@ -462,16 +459,8 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt)
.memory = V4L2_MEMORY_MMAP
};
struct buff_data *buf_descriptor;
struct pollfd p = { .fd = s->fd, .events = POLLIN };
int res;
res = poll(&p, 1, s->timeout);
if (res < 0)
return AVERROR(errno);
if (!(p.revents & (POLLIN | POLLERR | POLLHUP)))
return AVERROR(EAGAIN);
/* FIXME: Some special treatment might be needed in case of loss of signal... */
while ((res = v4l2_ioctl(s->fd, VIDIOC_DQBUF, &buf)) < 0 && (errno == EINTR));
if (res < 0) {
@ -658,10 +647,6 @@ static int v4l2_set_parameters(AVFormatContext *s1, AVFormatParameters *ap)
s1->streams[0]->codec->time_base.den = tpf->denominator;
s1->streams[0]->codec->time_base.num = tpf->numerator;
s->timeout = 100 +
av_rescale_q(1, s1->streams[0]->codec->time_base,
(AVRational){1, 1000});
return 0;
}