/*
- * Video4Linux2 grab interface
* Copyright (c) 2000,2001 Fabrice Bellard
* Copyright (c) 2006 Luca Abeni
*
- * Part of this file is based on the V4L2 video capture example
- * (http://v4l2spec.bytesex.org/v4l2spec/capture.c)
- *
- * Thanks to Michael Niedermayer for providing the mapping between
- * V4L2_PIX_FMT_* and PIX_FMT_*
+ * This file is part of FFmpeg.
*
- *
- * This file is part of Libav.
- *
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+/**
+ * @file
+ * Video4Linux2 grab interface
+ *
+ * Part of this file is based on the V4L2 video capture example
+ * (http://v4l2spec.bytesex.org/v4l2spec/capture.c)
+ *
+ * Thanks to Michael Niedermayer for providing the mapping between
+ * V4L2_PIX_FMT_* and PIX_FMT_*
+ */
+
#undef __STRICT_ANSI__ //workaround due to broken kernel headers
#include "config.h"
-#include "libavformat/avformat.h"
#include "libavformat/internal.h"
#include <unistd.h>
#include <fcntl.h>
#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
+#if HAVE_ASM_TYPES_H
+#include <asm/types.h>
+#endif
#include <linux/videodev2.h>
#endif
#include <time.h>
#include "libavutil/imgutils.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
+#include "avdevice.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/avstring.h"
-#include "libavutil/mathematics.h"
+
+#if CONFIG_LIBV4L2
+#include <libv4l2.h>
+#else
+#define v4l2_open open
+#define v4l2_close close
+#define v4l2_dup dup
+#define v4l2_ioctl ioctl
+#define v4l2_read read
+#define v4l2_mmap mmap
+#define v4l2_munmap munmap
+#endif
static const int desired_video_buffers = 256;
int frame_format; /* V4L2_PIX_FMT_* */
int width, height;
int frame_size;
- int timeout;
int interlaced;
int top_field_first;
{
struct v4l2_capability cap;
int fd;
+#if CONFIG_LIBV4L2
+ int fd_libv4l;
+#endif
int res, err;
int flags = O_RDWR;
flags |= O_NONBLOCK;
}
- fd = open(ctx->filename, flags, 0);
+ fd = v4l2_open(ctx->filename, flags, 0);
if (fd < 0) {
err = errno;
return AVERROR(err);
}
+#if CONFIG_LIBV4L2
+ fd_libv4l = v4l2_fd_open(fd, 0);
+ if (fd < 0) {
+ err = AVERROR(errno);
+ av_log(ctx, AV_LOG_ERROR, "Cannot open video device with libv4l neither %s : %s\n",
+ ctx->filename, strerror(errno));
+ return err;
+ }
+ fd = fd_libv4l;
+#endif
- res = ioctl(fd, VIDIOC_QUERYCAP, &cap);
+ res = v4l2_ioctl(fd, VIDIOC_QUERYCAP, &cap);
if (res < 0) {
err = errno;
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYCAP): %s\n",
return fd;
fail:
- close(fd);
+ v4l2_close(fd);
return AVERROR(err);
}
pix->pixelformat = pix_fmt;
pix->field = V4L2_FIELD_ANY;
- res = ioctl(fd, VIDIOC_S_FMT, &fmt);
+ res = v4l2_ioctl(fd, VIDIOC_S_FMT, &fmt);
if ((*width != fmt.fmt.pix.width) || (*height != fmt.fmt.pix.height)) {
av_log(ctx, AV_LOG_INFO,
int res;
v4l2_std_id std;
- res = ioctl(fd, VIDIOC_G_STD, &std);
+ res = v4l2_ioctl(fd, VIDIOC_G_STD, &std);
if (res < 0) {
return 0;
}
.memory = V4L2_MEMORY_MMAP
};
- res = ioctl(s->fd, VIDIOC_REQBUFS, &req);
+ res = v4l2_ioctl(s->fd, VIDIOC_REQBUFS, &req);
if (res < 0) {
if (errno == EINVAL) {
av_log(ctx, AV_LOG_ERROR, "Device does not support mmap\n");
} else {
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_REQBUFS)\n");
}
-
return AVERROR(errno);
}
if (req.count < 2) {
av_log(ctx, AV_LOG_ERROR, "Insufficient buffer memory\n");
-
return AVERROR(ENOMEM);
}
s->buffers = req.count;
s->buf_start = av_malloc(sizeof(void *) * s->buffers);
if (s->buf_start == NULL) {
av_log(ctx, AV_LOG_ERROR, "Cannot allocate buffer pointers\n");
-
return AVERROR(ENOMEM);
}
s->buf_len = av_malloc(sizeof(unsigned int) * s->buffers);
if (s->buf_len == NULL) {
av_log(ctx, AV_LOG_ERROR, "Cannot allocate buffer sizes\n");
av_free(s->buf_start);
-
return AVERROR(ENOMEM);
}
.index = i,
.memory = V4L2_MEMORY_MMAP
};
-
- res = ioctl(s->fd, VIDIOC_QUERYBUF, &buf);
+ res = v4l2_ioctl(s->fd, VIDIOC_QUERYBUF, &buf);
if (res < 0) {
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYBUF)\n");
-
return AVERROR(errno);
}
return -1;
}
- s->buf_start[i] = mmap(NULL, buf.length,
+ s->buf_start[i] = v4l2_mmap(NULL, buf.length,
PROT_READ | PROT_WRITE, MAP_SHARED,
s->fd, buf.m.offset);
if (s->buf_start[i] == MAP_FAILED) {
av_log(ctx, AV_LOG_ERROR, "mmap: %s\n", strerror(errno));
-
return AVERROR(errno);
}
}
fd = buf_descriptor->fd;
av_free(buf_descriptor);
- res = ioctl(fd, VIDIOC_QBUF, &buf);
+ res = v4l2_ioctl(fd, VIDIOC_QBUF, &buf);
if (res < 0)
av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n",
strerror(errno));
.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 = ioctl(s->fd, VIDIOC_DQBUF, &buf)) < 0 && (errno == EINTR));
+ while ((res = v4l2_ioctl(s->fd, VIDIOC_DQBUF, &buf)) < 0 && (errno == EINTR));
if (res < 0) {
if (errno == EAGAIN) {
pkt->size = 0;
-
return AVERROR(EAGAIN);
}
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_DQBUF): %s\n",
return AVERROR(errno);
}
- assert (buf.index < s->buffers);
+ assert(buf.index < s->buffers);
if (s->frame_size > 0 && buf.bytesused != s->frame_size) {
av_log(ctx, AV_LOG_ERROR,
"The v4l2 frame is %d bytes, but %d bytes are expected\n",
* allocate a buffer for memcopying into it
*/
av_log(ctx, AV_LOG_ERROR, "Failed to allocate a buffer descriptor\n");
- res = ioctl(s->fd, VIDIOC_QBUF, &buf);
+ res = v4l2_ioctl(s->fd, VIDIOC_QBUF, &buf);
return AVERROR(ENOMEM);
}
.memory = V4L2_MEMORY_MMAP
};
- res = ioctl(s->fd, VIDIOC_QBUF, &buf);
+ res = v4l2_ioctl(s->fd, VIDIOC_QBUF, &buf);
if (res < 0) {
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n",
strerror(errno));
}
type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- res = ioctl(s->fd, VIDIOC_STREAMON, &type);
+ res = v4l2_ioctl(s->fd, VIDIOC_STREAMON, &type);
if (res < 0) {
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_STREAMON): %s\n",
strerror(errno));
/* We do not check for the result, because we could
* not do anything about it anyway...
*/
- ioctl(s->fd, VIDIOC_STREAMOFF, &type);
+ v4l2_ioctl(s->fd, VIDIOC_STREAMOFF, &type);
for (i = 0; i < s->buffers; i++) {
- munmap(s->buf_start[i], s->buf_len[i]);
+ v4l2_munmap(s->buf_start[i], s->buf_len[i]);
}
av_free(s->buf_start);
av_free(s->buf_len);
/* set tv video input */
input.index = s->channel;
- if (ioctl(s->fd, VIDIOC_ENUMINPUT, &input) < 0) {
+ if (v4l2_ioctl(s->fd, VIDIOC_ENUMINPUT, &input) < 0) {
av_log(s1, AV_LOG_ERROR, "The V4L2 driver ioctl enum input failed:\n");
return AVERROR(EIO);
}
av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set input_id: %d, input: %s\n",
s->channel, input.name);
- if (ioctl(s->fd, VIDIOC_S_INPUT, &input.index) < 0) {
+ if (v4l2_ioctl(s->fd, VIDIOC_S_INPUT, &input.index) < 0) {
av_log(s1, AV_LOG_ERROR,
"The V4L2 driver ioctl set input(%d) failed\n",
s->channel);
/* set tv standard */
for(i=0;;i++) {
standard.index = i;
- if (ioctl(s->fd, VIDIOC_ENUMSTD, &standard) < 0) {
- av_log(s1, AV_LOG_ERROR,
- "The V4L2 driver ioctl set standard(%s) failed\n",
- s->standard);
- return AVERROR(EIO);
- }
-
- if (!av_strcasecmp(standard.name, s->standard)) {
+ ret = v4l2_ioctl(s->fd, VIDIOC_ENUMSTD, &standard);
+ if (ret < 0 || !av_strcasecmp(standard.name, s->standard))
break;
- }
+ }
+ if (ret < 0) {
+ av_log(s1, AV_LOG_ERROR, "Unknown standard '%s'\n", s->standard);
+ return ret;
}
av_log(s1, AV_LOG_DEBUG,
"The V4L2 driver set standard: %s, id: %"PRIu64"\n",
s->standard, (uint64_t)standard.id);
- if (ioctl(s->fd, VIDIOC_S_STD, &standard.id) < 0) {
+ if (v4l2_ioctl(s->fd, VIDIOC_S_STD, &standard.id) < 0) {
av_log(s1, AV_LOG_ERROR,
"The V4L2 driver ioctl set standard(%s) failed\n",
s->standard);
tpf->numerator = framerate_q.den;
tpf->denominator = framerate_q.num;
- if (ioctl(s->fd, VIDIOC_S_PARM, &streamparm) != 0) {
+ if (v4l2_ioctl(s->fd, VIDIOC_S_PARM, &streamparm) != 0) {
av_log(s1, AV_LOG_ERROR,
"ioctl set time per frame(%d/%d) failed\n",
framerate_q.den, framerate_q.num);
tpf->numerator, tpf->denominator);
}
} else {
- if (ioctl(s->fd, VIDIOC_G_PARM, &streamparm) != 0) {
+ if (v4l2_ioctl(s->fd, VIDIOC_G_PARM, &streamparm) != 0) {
av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_G_PARM): %s\n",
strerror(errno));
return AVERROR(errno);
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;
}
av_log(s1, AV_LOG_VERBOSE,
"Querying the device for the current frame size\n");
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- if (ioctl(s->fd, VIDIOC_G_FMT, &fmt) < 0) {
+ if (v4l2_ioctl(s->fd, VIDIOC_G_FMT, &fmt) < 0) {
av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_G_FMT): %s\n",
strerror(errno));
res = AVERROR(errno);
if (desired_format == 0) {
av_log(s1, AV_LOG_ERROR, "Cannot find a proper format for "
"codec_id %d, pix_fmt %d.\n", s1->video_codec_id, pix_fmt);
- close(s->fd);
+ v4l2_close(s->fd);
res = AVERROR(EIO);
goto out;
}
-
- if ((res = av_image_check_size(s->width, s->height, 0, s1) < 0))
+ if ((res = av_image_check_size(s->width, s->height, 0, s1)) < 0)
goto out;
s->frame_format = desired_format;
- if ((res = v4l2_set_parameters(s1) < 0))
+ if ((res = v4l2_set_parameters(s1)) < 0)
goto out;
st->codec->pix_fmt = fmt_v4l2ff(desired_format, codec_id);
if ((res = mmap_init(s1)) ||
(res = mmap_start(s1)) < 0) {
- close(s->fd);
+ v4l2_close(s->fd);
goto out;
}
mmap_close(s);
- close(s->fd);
+ v4l2_close(s->fd);
return 0;
}
#define OFFSET(x) offsetof(struct video_data, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
+
static const AVOption options[] = {
{ "standard", "TV standard, used only by analog frame grabber", OFFSET(standard), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC },
{ "channel", "TV channel, used only by frame grabber", OFFSET(channel), AV_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, DEC },
};
AVInputFormat ff_v4l2_demuxer = {
- .name = "video4linux2",
+ .name = "video4linux2,v4l2",
.long_name = NULL_IF_CONFIG_SMALL("Video4Linux2 device grab"),
.priv_data_size = sizeof(struct video_data),
.read_header = v4l2_read_header,
projects / ffmpeg / blobdiff