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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2010-05-19 11:59:00 +0200
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2010-05-19 11:59:00 +0200
commitf2ff2bfef299e3ebddeb4962aef50d3c3012edb6 (patch)
tree9b3f4272ebff19c181bcc07cf8169b02020099d1
Initial import
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
-rw-r--r--COPYING.GPL339
-rw-r--r--Makefile18
-rw-r--r--yavta.c1138
3 files changed, 1495 insertions, 0 deletions
diff --git a/COPYING.GPL b/COPYING.GPL
new file mode 100644
index 0000000..d511905
--- /dev/null
+++ b/COPYING.GPL
@@ -0,0 +1,339 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The licenses for most software are designed to take away your
+freedom to share and change it. By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users. This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it. (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.) You can apply it to
+your programs, too.
+
+ When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+ To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+ For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have. You must make sure that they, too, receive or can get the
+source code. And you must show them these terms so they know their
+rights.
+
+ We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+ Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software. If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+ Finally, any free program is threatened constantly by software
+patents. We wish to avoid the danger that redistributors of a free
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+program proprietary. To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+ The precise terms and conditions for copying, distribution and
+modification follow.
+
+ GNU GENERAL PUBLIC LICENSE
+ TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+ 0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License. The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language. (Hereinafter, translation is included without limitation in
+the term "modification".) Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope. The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+ 1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+ 2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+ a) You must cause the modified files to carry prominent notices
+ stating that you changed the files and the date of any change.
+
+ b) You must cause any work that you distribute or publish, that in
+ whole or in part contains or is derived from the Program or any
+ part thereof, to be licensed as a whole at no charge to all third
+ parties under the terms of this License.
+
+ c) If the modified program normally reads commands interactively
+ when run, you must cause it, when started running for such
+ interactive use in the most ordinary way, to print or display an
+ announcement including an appropriate copyright notice and a
+ notice that there is no warranty (or else, saying that you provide
+ a warranty) and that users may redistribute the program under
+ these conditions, and telling the user how to view a copy of this
+ License. (Exception: if the Program itself is interactive but
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+ the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole. If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works. But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
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+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+ 3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+ a) Accompany it with the complete corresponding machine-readable
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+
+ 4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License. Any attempt
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+parties remain in full compliance.
+
+ 5. You are not required to accept this License, since you have not
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+distribute the Program or its derivative works. These actions are
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+modifying or distributing the Program (or any work based on the
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+the Program or works based on it.
+
+ 6. Each time you redistribute the Program (or any work based on the
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+
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+infringement or for any other reason (not limited to patent issues),
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+may not distribute the Program at all. For example, if a patent
+license would not permit royalty-free redistribution of the Program by
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+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
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+
+It is not the purpose of this section to induce you to infringe any
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+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices. Many people have made
+generous contributions to the wide range of software distributed
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+to distribute software through any other system and a licensee cannot
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+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+ 8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded. In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+ 9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation. If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+ 10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
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+make exceptions for this. Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+ NO WARRANTY
+
+ 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+ 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+ Gnomovision version 69, Copyright (C) year name of author
+ Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. Here is a sample; alter the names:
+
+ Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+ `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+ <signature of Ty Coon>, 1 April 1989
+ Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs. If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..5c9cc68
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,18 @@
+CROSS_COMPILE ?=
+
+CC := $(CROSS_COMPILE)gcc
+CFLAGS := -O2 -W -Wall
+LDFLAGS :=
+
+%.o : %.c
+ $(CC) $(CFLAGS) -c -o $@ $<
+
+all: yavta
+
+yavta: yavta.o
+ $(CC) $(LDFLAGS) -o $@ $^
+
+clean:
+ -rm -f *.o
+ -rm -f yavta
+
diff --git a/yavta.c b/yavta.c
new file mode 100644
index 0000000..4c0d97b
--- /dev/null
+++ b/yavta.c
@@ -0,0 +1,1138 @@
+/*
+ * yavta -- Yet Another V4L2 Test Application
+ *
+ * Copyright (C) 2005-2010 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <getopt.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/select.h>
+#include <sys/time.h>
+
+#include <linux/videodev2.h>
+
+#define ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0]))
+
+struct device
+{
+ int fd;
+
+ enum v4l2_buf_type type;
+ enum v4l2_memory memtype;
+ unsigned int nbufs;
+ unsigned int bufsize;
+ void **mem;
+};
+
+static const char *v4l2_buf_type_name(enum v4l2_buf_type type)
+{
+ static struct {
+ enum v4l2_buf_type type;
+ const char *name;
+ } names[] = {
+ { V4L2_BUF_TYPE_VIDEO_CAPTURE, "Video capture" },
+ { V4L2_BUF_TYPE_VIDEO_OUTPUT, "Video output" },
+ { V4L2_BUF_TYPE_VIDEO_OVERLAY, "Video overlay" },
+ };
+
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(names); ++i) {
+ if (names[i].type == type)
+ return names[i].name;
+ }
+
+ if (type & V4L2_BUF_TYPE_PRIVATE)
+ return "Private";
+ else
+ return "Unknown";
+}
+
+static const char *v4l2_fourcc_name(unsigned int fourcc)
+{
+ static char name[5];
+ unsigned int i;
+
+ for (i = 0; i < 4; ++i) {
+ name[i] = fourcc & 0xff;
+ fourcc >>= 8;
+ }
+
+ name[4] = '\0';
+ return name;
+}
+
+static int video_open(struct device *dev, const char *devname, int no_query)
+{
+ struct v4l2_capability cap;
+ int ret;
+
+ memset(dev, 0, sizeof *dev);
+ dev->fd = -1;
+ dev->memtype = V4L2_MEMORY_MMAP;
+ dev->mem = NULL;
+
+ dev->fd = open(devname, O_RDWR);
+ if (dev->fd < 0) {
+ printf("Error opening device %s: %d.\n", devname, errno);
+ return dev->fd;
+ }
+
+ if (!no_query) {
+ memset(&cap, 0, sizeof cap);
+ ret = ioctl(dev->fd, VIDIOC_QUERYCAP, &cap);
+ if (ret < 0) {
+ printf("Error opening device %s: unable to query "
+ "device.\n", devname);
+ close(dev->fd);
+ return ret;
+ }
+
+ if (cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)
+ dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ else if (cap.capabilities & V4L2_CAP_VIDEO_OUTPUT)
+ dev->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+ else {
+ printf("Error opening device %s: neither video capture "
+ "nor video output supported.\n", devname);
+ close(dev->fd);
+ return -EINVAL;
+ }
+
+ printf("Device %s opened: %s.\n", devname, cap.card);
+ } else {
+ dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ printf("Device %s opened.\n", devname);
+ }
+
+ return 0;
+}
+
+static void video_close(struct device *dev)
+{
+ free(dev->mem);
+ close(dev->fd);
+}
+
+static void uvc_get_control(struct device *dev, unsigned int id)
+{
+ struct v4l2_control ctrl;
+ int ret;
+
+ ctrl.id = id;
+
+ ret = ioctl(dev->fd, VIDIOC_G_CTRL, &ctrl);
+ if (ret < 0) {
+ printf("unable to get control: %s (%d).\n",
+ strerror(errno), errno);
+ return;
+ }
+
+ printf("Control 0x%08x value %u\n", id, ctrl.value);
+}
+
+static void uvc_set_control(struct device *dev, unsigned int id, int value)
+{
+ struct v4l2_control ctrl;
+ int ret;
+
+ ctrl.id = id;
+ ctrl.value = value;
+
+ ret = ioctl(dev->fd, VIDIOC_S_CTRL, &ctrl);
+ if (ret < 0) {
+ printf("unable to set control: %s (%d).\n",
+ strerror(errno), errno);
+ return;
+ }
+
+ printf("Control 0x%08x set to %u, is %u\n", id, value,
+ ctrl.value);
+}
+
+static int video_get_format(struct device *dev)
+{
+ struct v4l2_format fmt;
+ int ret;
+
+ memset(&fmt, 0, sizeof fmt);
+ fmt.type = dev->type;
+
+ ret = ioctl(dev->fd, VIDIOC_G_FMT, &fmt);
+ if (ret < 0) {
+ printf("Unable to get format: %s (%d).\n", strerror(errno),
+ errno);
+ return ret;
+ }
+
+ printf("Video format: %c%c%c%c (%08x) %ux%u\n",
+ (fmt.fmt.pix.pixelformat >> 0) & 0xff,
+ (fmt.fmt.pix.pixelformat >> 8) & 0xff,
+ (fmt.fmt.pix.pixelformat >> 16) & 0xff,
+ (fmt.fmt.pix.pixelformat >> 24) & 0xff,
+ fmt.fmt.pix.pixelformat,
+ fmt.fmt.pix.width, fmt.fmt.pix.height);
+ return 0;
+}
+
+static int video_set_format(struct device *dev, unsigned int w, unsigned int h, unsigned int format)
+{
+ struct v4l2_format fmt;
+ int ret;
+
+ memset(&fmt, 0, sizeof fmt);
+ fmt.type = dev->type;
+ fmt.fmt.pix.width = w;
+ fmt.fmt.pix.height = h;
+ fmt.fmt.pix.pixelformat = format;
+ fmt.fmt.pix.field = V4L2_FIELD_ANY;
+
+ ret = ioctl(dev->fd, VIDIOC_S_FMT, &fmt);
+ if (ret < 0) {
+ printf("Unable to set format: %s (%d).\n", strerror(errno),
+ errno);
+ return ret;
+ }
+
+ printf("Video format set: width: %u height: %u buffer size: %u\n",
+ fmt.fmt.pix.width, fmt.fmt.pix.height, fmt.fmt.pix.sizeimage);
+ return 0;
+}
+
+static int video_set_framerate(struct device *dev, struct v4l2_fract *time_per_frame)
+{
+ struct v4l2_streamparm parm;
+ int ret;
+
+ memset(&parm, 0, sizeof parm);
+ parm.type = dev->type;
+
+ ret = ioctl(dev->fd, VIDIOC_G_PARM, &parm);
+ if (ret < 0) {
+ printf("Unable to get frame rate: %d.\n", errno);
+ return ret;
+ }
+
+ printf("Current frame rate: %u/%u\n",
+ parm.parm.capture.timeperframe.numerator,
+ parm.parm.capture.timeperframe.denominator);
+
+ printf("Setting frame rate to: %u/%u\n",
+ time_per_frame->numerator,
+ time_per_frame->denominator);
+
+ parm.parm.capture.timeperframe.numerator = time_per_frame->numerator;
+ parm.parm.capture.timeperframe.denominator = time_per_frame->denominator;
+
+ ret = ioctl(dev->fd, VIDIOC_S_PARM, &parm);
+ if (ret < 0) {
+ printf("Unable to set frame rate: %d.\n", errno);
+ return ret;
+ }
+
+ ret = ioctl(dev->fd, VIDIOC_G_PARM, &parm);
+ if (ret < 0) {
+ printf("Unable to get frame rate: %d.\n", errno);
+ return ret;
+ }
+
+ printf("Frame rate set: %u/%u\n",
+ parm.parm.capture.timeperframe.numerator,
+ parm.parm.capture.timeperframe.denominator);
+ return 0;
+}
+
+static int video_alloc_buffers(struct device *dev, int nbufs)
+{
+ struct v4l2_requestbuffers rb;
+ struct v4l2_buffer buf;
+ void **bufmem;
+ unsigned int i;
+ int ret;
+
+ memset(&rb, 0, sizeof rb);
+ rb.count = nbufs;
+ rb.type = dev->type;
+ rb.memory = dev->memtype;
+
+ ret = ioctl(dev->fd, VIDIOC_REQBUFS, &rb);
+ if (ret < 0) {
+ printf("Unable to request buffers: %d.\n", errno);
+ return ret;
+ }
+
+ printf("%u buffers requested.\n", rb.count);
+
+ bufmem = malloc(rb.count * sizeof bufmem[0]);
+ if (bufmem == NULL)
+ return -ENOMEM;
+
+ /* Map the buffers. */
+ for (i = 0; i < rb.count; ++i) {
+ memset(&buf, 0, sizeof buf);
+ buf.index = i;
+ buf.type = dev->type;
+ buf.memory = dev->memtype;
+ ret = ioctl(dev->fd, VIDIOC_QUERYBUF, &buf);
+ if (ret < 0) {
+ printf("Unable to query buffer %u (%d).\n", i, errno);
+ return ret;
+ }
+ printf("length: %u offset: %u\n", buf.length, buf.m.offset);
+
+ switch (dev->memtype) {
+ case V4L2_MEMORY_MMAP:
+ bufmem[i] = mmap(0, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, dev->fd, buf.m.offset);
+ if (bufmem[i] == MAP_FAILED) {
+ printf("Unable to map buffer %u (%d)\n", i, errno);
+ return ret;
+ }
+ printf("Buffer %u mapped at address %p.\n", i, bufmem[i]);
+ break;
+
+ case V4L2_MEMORY_USERPTR:
+ bufmem[i] = malloc(buf.length);
+ if (bufmem[i] == NULL) {
+ printf("Unable to allocate buffer %u (%d)\n", i, errno);
+ return -ENOMEM;
+ }
+ printf("Buffer %u allocated at address %p.\n", i, bufmem[i]);
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ dev->mem = bufmem;
+ dev->nbufs = rb.count;
+ dev->bufsize = buf.length;
+ return 0;
+}
+
+static int video_free_buffers(struct device *dev)
+{
+ struct v4l2_requestbuffers rb;
+ unsigned int i;
+ int ret;
+
+ if (dev->nbufs == 0)
+ return 0;
+
+ if (dev->memtype == V4L2_MEMORY_MMAP) {
+ for (i = 0; i < dev->nbufs; ++i) {
+ ret = munmap(dev->mem[i], dev->bufsize);
+ if (ret < 0) {
+ printf("Unable to unmap buffer %u (%d)\n", i, errno);
+ return ret;
+ }
+ }
+ }
+
+ memset(&rb, 0, sizeof rb);
+ rb.count = 0;
+ rb.type = dev->type;
+ rb.memory = dev->memtype;
+
+ ret = ioctl(dev->fd, VIDIOC_REQBUFS, &rb);
+ if (ret < 0) {
+ printf("Unable to release buffers: %d.\n", errno);
+ return ret;
+ }
+
+ printf("%u buffers released.\n", dev->nbufs);
+
+ free(dev->mem);
+ dev->nbufs = 0;
+ dev->mem = NULL;
+
+ return 0;
+}
+
+static int video_queue_buffer(struct device *dev, int index)
+{
+ struct v4l2_buffer buf;
+ int ret;
+
+ memset(&buf, 0, sizeof buf);
+ buf.index = index;
+ buf.type = dev->type;
+ buf.memory = dev->memtype;
+ if (dev->memtype == V4L2_MEMORY_USERPTR)
+ buf.m.userptr = (unsigned long)dev->mem[index];
+
+ if (dev->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
+ buf.bytesused = buf.length;
+ memset(dev->mem[buf.index], 0, buf.bytesused);
+ }
+
+ ret = ioctl(dev->fd, VIDIOC_QBUF, &buf);
+ if (ret < 0)
+ printf("Unable to queue buffer (%d).\n", errno);
+
+ return ret;
+}
+
+static int video_enable(struct device *dev, int enable)
+{
+ int type = dev->type;
+ int ret;
+
+ ret = ioctl(dev->fd, enable ? VIDIOC_STREAMON : VIDIOC_STREAMOFF, &type);
+ if (ret < 0) {
+ printf("Unable to %s streaming: %d.\n", enable ? "start" : "stop",
+ errno);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void video_query_menu(struct device *dev, unsigned int id)
+{
+ struct v4l2_querymenu menu;
+ int ret;
+
+ menu.index = 0;
+ while (1) {
+ menu.id = id;
+ ret = ioctl(dev->fd, VIDIOC_QUERYMENU, &menu);
+ if (ret < 0)
+ break;
+
+ printf(" %u: %.32s\n", menu.index, menu.name);
+ menu.index++;
+ };
+}
+
+static void video_list_controls(struct device *dev)
+{
+ struct v4l2_queryctrl query;
+ struct v4l2_control ctrl;
+ unsigned int nctrls = 0;
+ char value[12];
+ int ret;
+
+#ifndef V4L2_CTRL_FLAG_NEXT_CTRL
+ unsigned int i;
+
+ for (i = V4L2_CID_BASE; i <= V4L2_CID_LASTP1; ++i) {
+ query.id = i;
+#else
+ query.id = 0;
+ while (1) {
+ query.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
+#endif
+ ret = ioctl(dev->fd, VIDIOC_QUERYCTRL, &query);
+ if (ret < 0)
+ break;
+
+ if (query.flags & V4L2_CTRL_FLAG_DISABLED)
+ continue;
+
+ ctrl.id = query.id;
+ ret = ioctl(dev->fd, VIDIOC_G_CTRL, &ctrl);
+ if (ret < 0)
+ strcpy(value, "n/a");
+ else
+ sprintf(value, "%d", ctrl.value);
+
+ printf("control 0x%08x %s min %d max %d step %d default %d current %s.\n",
+ query.id, query.name, query.minimum, query.maximum,
+ query.step, query.default_value, value);
+
+ if (query.type == V4L2_CTRL_TYPE_MENU)
+ video_query_menu(dev, query.id);
+
+ nctrls++;
+ }
+
+ if (nctrls)
+ printf("%u control%s found.\n", nctrls, nctrls > 1 ? "s" : "");
+ else
+ printf("No control found.\n");
+}
+
+static void video_enum_frame_intervals(struct device *dev, __u32 pixelformat,
+ unsigned int width, unsigned int height)
+{
+ struct v4l2_frmivalenum ival;
+ unsigned int i;
+ int ret;
+
+ for (i = 0; ; ++i) {
+ memset(&ival, 0, sizeof ival);
+ ival.index = i;
+ ival.pixel_format = pixelformat;
+ ival.width = width;
+ ival.height = height;
+ ret = ioctl(dev->fd, VIDIOC_ENUM_FRAMEINTERVALS, &ival);
+ if (ret < 0)
+ break;
+
+ if (i != ival.index)
+ printf("Warning: driver returned wrong ival index "
+ "%u.\n", ival.index);
+ if (pixelformat != ival.pixel_format)
+ printf("Warning: driver returned wrong ival pixel "
+ "format %08x.\n", ival.pixel_format);
+ if (width != ival.width)
+ printf("Warning: driver returned wrong ival width "
+ "%u.\n", ival.width);
+ if (height != ival.height)
+ printf("Warning: driver returned wrong ival height "
+ "%u.\n", ival.height);
+
+ if (i != 0)
+ printf(", ");
+
+ switch (ival.type) {
+ case V4L2_FRMIVAL_TYPE_DISCRETE:
+ printf("%u/%u",
+ ival.discrete.numerator,
+ ival.discrete.denominator);
+ break;
+
+ case V4L2_FRMIVAL_TYPE_CONTINUOUS:
+ printf("%u/%u - %u/%u",
+ ival.stepwise.min.numerator,
+ ival.stepwise.min.denominator,
+ ival.stepwise.max.numerator,
+ ival.stepwise.max.denominator);
+ return;
+
+ case V4L2_FRMIVAL_TYPE_STEPWISE:
+ printf("%u/%u - %u/%u (by %u/%u)",
+ ival.stepwise.min.numerator,
+ ival.stepwise.min.denominator,
+ ival.stepwise.max.numerator,
+ ival.stepwise.max.denominator,
+ ival.stepwise.step.numerator,
+ ival.stepwise.step.denominator);
+ return;
+
+ default:
+ break;
+ }
+ }
+}
+
+static void video_enum_frame_sizes(struct device *dev, __u32 pixelformat)
+{
+ struct v4l2_frmsizeenum frame;
+ unsigned int i;
+ int ret;
+
+ for (i = 0; ; ++i) {
+ memset(&frame, 0, sizeof frame);
+ frame.index = i;
+ frame.pixel_format = pixelformat;
+ ret = ioctl(dev->fd, VIDIOC_ENUM_FRAMESIZES, &frame);
+ if (ret < 0)
+ break;
+
+ if (i != frame.index)
+ printf("Warning: driver returned wrong frame index "
+ "%u.\n", frame.index);
+ if (pixelformat != frame.pixel_format)
+ printf("Warning: driver returned wrong frame pixel "
+ "format %08x.\n", frame.pixel_format);
+
+ switch (frame.type) {
+ case V4L2_FRMSIZE_TYPE_DISCRETE:
+ printf("\tFrame size: %ux%u (", frame.discrete.width,
+ frame.discrete.height);
+ video_enum_frame_intervals(dev, frame.pixel_format,
+ frame.discrete.width, frame.discrete.height);
+ printf(")\n");
+ break;
+
+ case V4L2_FRMSIZE_TYPE_CONTINUOUS:
+ printf("\tFrame size: %ux%u - %ux%u (",
+ frame.stepwise.min_width,
+ frame.stepwise.min_height,
+ frame.stepwise.max_width,
+ frame.stepwise.max_height);
+ video_enum_frame_intervals(dev, frame.pixel_format,
+ frame.stepwise.max_width,
+ frame.stepwise.max_height);
+ printf(")\n");
+ break;
+
+ case V4L2_FRMSIZE_TYPE_STEPWISE:
+ printf("\tFrame size: %ux%u - %ux%u (by %ux%u) (\n",
+ frame.stepwise.min_width,
+ frame.stepwise.min_height,
+ frame.stepwise.max_width,
+ frame.stepwise.max_height,
+ frame.stepwise.step_width,
+ frame.stepwise.step_height);
+ video_enum_frame_intervals(dev, frame.pixel_format,
+ frame.stepwise.max_width,
+ frame.stepwise.max_height);
+ printf(")\n");
+ break;
+
+ default:
+ break;
+ }
+ }
+}
+static void video_enum_formats(struct device *dev, enum v4l2_buf_type type)
+{
+ struct v4l2_fmtdesc fmt;
+ unsigned int i;
+ int ret;
+
+ for (i = 0; ; ++i) {
+ memset(&fmt, 0, sizeof fmt);
+ fmt.index = i;
+ fmt.type = type;
+ ret = ioctl(dev->fd, VIDIOC_ENUM_FMT, &fmt);
+ if (ret < 0)
+ break;
+
+ if (i != fmt.index)
+ printf("Warning: driver returned wrong format index "
+ "%u.\n", fmt.index);
+ if (type != fmt.type)
+ printf("Warning: driver returned wrong format type "
+ "%u.\n", fmt.type);
+
+ printf("\tFormat %u: %s (%08x)\n", i,
+ v4l2_fourcc_name(fmt.pixelformat), fmt.pixelformat);
+ printf("\tType: %s (%u)\n", v4l2_buf_type_name(fmt.type),
+ fmt.type);
+ printf("\tName: %.32s\n", fmt.description);
+ video_enum_frame_sizes(dev, fmt.pixelformat);
+ printf("\n");
+ }
+}
+
+static void video_enum_inputs(struct device *dev)
+{
+ struct v4l2_input input;
+ unsigned int i;
+ int ret;
+
+ for (i = 0; ; ++i) {
+ memset(&input, 0, sizeof input);
+ input.index = i;
+ ret = ioctl(dev->fd, VIDIOC_ENUMINPUT, &input);
+ if (ret < 0)
+ break;
+
+ if (i != input.index)
+ printf("Warning: driver returned wrong input index "
+ "%u.\n", input.index);
+
+ printf("\tInput %u: %s.\n", i, input.name);
+ }
+
+ printf("\n");
+}
+
+static int video_get_input(struct device *dev)
+{
+ __u32 input;
+ int ret;
+
+ ret = ioctl(dev->fd, VIDIOC_G_INPUT, &input);
+ if (ret < 0) {
+ printf("Unable to get current input: %s.\n", strerror(errno));
+ return ret;
+ }
+
+ return input;
+}
+
+static int video_set_input(struct device *dev, unsigned int input)
+{
+ __u32 _input = input;
+ int ret;
+
+ ret = ioctl(dev->fd, VIDIOC_S_INPUT, &_input);
+ if (ret < 0)
+ printf("Unable to select input %u: %s.\n", input,
+ strerror(errno));
+
+ return ret;
+}
+
+static int video_set_quality(struct device *dev, unsigned int quality)
+{
+ struct v4l2_jpegcompression jpeg;
+ int ret;
+
+ if (quality == (unsigned int)-1)
+ return 0;
+
+ memset(&jpeg, 0, sizeof jpeg);
+ jpeg.quality = quality;
+
+ ret = ioctl(dev->fd, VIDIOC_S_JPEGCOMP, &jpeg);
+ if (ret < 0) {
+ printf("Unable to set quality to %u: %s.\n", quality,
+ strerror(errno));
+ return ret;
+ }
+
+ ret = ioctl(dev->fd, VIDIOC_G_JPEGCOMP, &jpeg);
+ if (ret >= 0)
+ printf("Quality set to %u\n", jpeg.quality);
+
+ return 0;
+}
+
+static int video_prepare_capture(struct device *dev, int nbufs)
+{
+ unsigned int i;
+ int ret;
+
+ /* Allocate and map buffers. */
+ if ((ret = video_alloc_buffers(dev, nbufs)) < 0)
+ return ret;
+
+ /* Queue the buffers. */
+ for (i = 0; i < dev->nbufs; ++i) {
+ ret = video_queue_buffer(dev, i);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int video_do_capture(struct device *dev, unsigned int nframes,
+ unsigned int skip, unsigned int delay, const char *filename_prefix)
+{
+ char *filename;
+ struct timeval start, end, ts;
+ struct v4l2_buffer buf;
+ unsigned int size;
+ unsigned int i;
+ FILE *file;
+ double bps;
+ double fps;
+ int ret;
+
+ if (filename_prefix != NULL) {
+ filename = malloc(strlen(filename_prefix) + 12);
+ if (filename == NULL)
+ return -ENOMEM;
+ }
+
+ /* Start streaming. */
+ video_enable(dev, 1);
+
+ size = 0;
+
+ for (i = 0; i < nframes; ++i) {
+ /* Dequeue a buffer. */
+ memset(&buf, 0, sizeof buf);
+ buf.type = dev->type;
+ buf.memory = dev->memtype;
+ ret = ioctl(dev->fd, VIDIOC_DQBUF, &buf);
+ if (ret < 0) {
+ if (errno != EIO) {
+ printf("Unable to dequeue buffer (%d).\n", errno);
+ goto done;
+ }
+ buf.type = dev->type;
+ buf.memory = dev->memtype;
+ if (dev->memtype == V4L2_MEMORY_USERPTR)
+ buf.m.userptr = (unsigned long)dev->mem[i];
+ }
+
+ size += buf.bytesused;
+
+ gettimeofday(&ts, NULL);
+ printf("%u (%u) %u bytes %ld.%06ld %ld.%06ld\n", i, buf.index,
+ buf.bytesused, buf.timestamp.tv_sec,
+ buf.timestamp.tv_usec, ts.tv_sec, ts.tv_usec);
+
+ if (i == 0)
+ start = ts;
+
+ /* Save the image. */
+ if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && filename_prefix && !skip) {
+ sprintf(filename, "%s-%06u.bin", filename_prefix, i);
+ file = fopen(filename, "wb");
+ if (file != NULL) {
+ ret = fwrite(dev->mem[buf.index], buf.bytesused, 1, file);
+ fclose(file);
+ }
+ }
+ if (skip)
+ --skip;
+
+ /* Requeue the buffer. */
+ if (delay > 0)
+ usleep(delay * 1000);
+
+ ret = video_queue_buffer(dev, buf.index);
+ if (ret < 0) {
+ printf("Unable to requeue buffer (%d).\n", errno);
+ goto done;
+ }
+
+ fflush(stdout);
+ }
+ gettimeofday(&end, NULL);
+
+ /* Stop streaming. */
+ video_enable(dev, 0);
+
+ end.tv_sec -= start.tv_sec;
+ end.tv_usec -= start.tv_usec;
+ if (end.tv_usec < 0) {
+ end.tv_sec--;
+ end.tv_usec += 1000000;
+ }
+
+ bps = size/(end.tv_usec+1000000.0*end.tv_sec)*1000000.0;
+ fps = (i-1)/(end.tv_usec+1000000.0*end.tv_sec)*1000000.0;
+
+ printf("Captured %u frames in %lu.%06lu seconds (%f fps, %f B/s).\n",
+ i-1, end.tv_sec, end.tv_usec, fps, bps);
+
+done:
+ free(filename);
+ return video_free_buffers(dev);
+}
+
+#define V4L_BUFFERS_DEFAULT 8
+#define V4L_BUFFERS_MAX 32
+
+static void usage(const char *argv0)
+{
+ printf("Usage: %s [options] device\n", argv0);
+ printf("Supported options:\n");
+ printf("-c, --capture[=nframes] Capture frames\n");
+ printf("-d, --delay Delay (in ms) before requeuing buffers\n");
+ printf("-f, --format format Set the video format\n");
+ printf("-F, --file prefix Read/write frames from/to disk\n");
+ printf("-h, --help Show this help screen\n");
+ printf("-i, --input input Select the video input\n");
+ printf("-l, --list-controls List available controls\n");
+ printf("-n, --nbufs n Set the number of video buffers\n");
+ printf("-p, --pause Pause before starting the video stream\n");
+ printf("-q, --quality n MJPEG quality (0-100)\n");
+ printf("-r, --get-control ctrl Get control 'ctrl'\n");
+ printf("-s, --size WxH Set the frame size\n");
+ printf("-t, --time-per-frame num/denom Set the time per frame (eg. 1/25 = 25 fps)\n");
+ printf("-u, --userptr Use the user pointers streaming method\n");
+ printf("-w, --set-control 'ctrl value' Set control 'ctrl' to 'value'\n");
+ printf(" --enum-formats Enumerate formats\n");
+ printf(" --enum-inputs Enumerate inputs\n");
+ printf(" --no-query Don't query capabilities on open\n");
+ printf(" --skip n Skip the first n frames\n");
+ printf(" --sleep-forever Sleep forever after configuring the device\n");
+}
+
+#define OPT_ENUM_FORMATS 256
+#define OPT_ENUM_INPUTS 257
+#define OPT_SKIP_FRAMES 258
+#define OPT_NO_QUERY 259
+#define OPT_SLEEP_FOREVER 260
+
+static struct option opts[] = {
+ {"capture", 2, 0, 'c'},
+ {"delay", 1, 0, 'd'},
+ {"enum-formats", 0, 0, OPT_ENUM_FORMATS},
+ {"enum-inputs", 0, 0, OPT_ENUM_INPUTS},
+ {"file", 2, 0, 'F'},
+ {"format", 1, 0, 'f'},
+ {"help", 0, 0, 'h'},
+ {"input", 1, 0, 'i'},
+ {"list-controls", 0, 0, 'l'},
+ {"nbufs", 1, 0, 'n'},
+ {"no-query", 0, 0, OPT_NO_QUERY},
+ {"pause", 0, 0, 'p'},
+ {"quality", 1, 0, 'q'},
+ {"get-control", 1, 0, 'r'},
+ {"size", 1, 0, 's'},
+ {"set-control", 1, 0, 'w'},
+ {"skip", 1, 0, OPT_SKIP_FRAMES},
+ {"sleep-forever", 0, 0, OPT_SLEEP_FOREVER},
+ {"time-per-frame", 1, 0, 't'},
+ {"userptr", 0, 0, 'u'},
+ {0, 0, 0, 0}
+};
+
+int main(int argc, char *argv[])
+{
+ struct device dev;
+ int ret;
+
+ /* Options parsings */
+ int do_file = 0, do_capture = 0, do_pause = 0;
+ int do_set_time_per_frame = 0;
+ int do_enum_formats = 0, do_set_format = 0;
+ int do_enum_inputs = 0, do_set_input = 0;
+ int do_list_controls = 0, do_get_control = 0, do_set_control = 0;
+ int do_sleep_forever = 0;
+ int no_query = 0;
+ char *endptr;
+ int c;
+
+ /* Controls */
+ int ctrl_name = 0;
+ int ctrl_value = 0;
+
+ /* Video buffers */
+ enum v4l2_memory memtype = V4L2_MEMORY_MMAP;
+ unsigned int pixelformat = V4L2_PIX_FMT_YUYV;
+ unsigned int width = 640;
+ unsigned int height = 480;
+ unsigned int nbufs = V4L_BUFFERS_DEFAULT;
+ unsigned int input = 0;
+ unsigned int skip = 0;
+ unsigned int quality = (unsigned int)-1;
+ struct v4l2_fract time_per_frame = {1, 25};
+
+ /* Capture loop */
+ unsigned int delay = 0, nframes = (unsigned int)-1;
+ const char *filename = "frame";
+
+ opterr = 0;
+ while ((c = getopt_long(argc, argv, "cd:f:Fhi:ln:pq:r:s:t:uw:", opts, NULL)) != -1) {
+
+ switch (c) {
+ case 'c':
+ do_capture = 1;
+ if (optarg)
+ nframes = atoi(optarg);
+ break;
+ case 'd':
+ delay = atoi(optarg);
+ break;
+ case 'f':
+ do_set_format = 1;
+ if (strcasecmp(optarg, "MJPEG") == 0)
+ pixelformat = V4L2_PIX_FMT_MJPEG;
+ else if (strcasecmp(optarg, "YUYV") == 0)
+ pixelformat = V4L2_PIX_FMT_YUYV;
+ else if (strcasecmp(optarg, "UYVY") == 0)
+ pixelformat = V4L2_PIX_FMT_UYVY;
+ else if (strcasecmp(optarg, "SGRBG10") == 0)
+ pixelformat = V4L2_PIX_FMT_SGRBG10;
+ else if (strcasecmp(optarg, "DV") == 0)
+ pixelformat = V4L2_PIX_FMT_DV;
+ else {
+ printf("Unsupported video format '%s'\n", optarg);
+ return 1;
+ }
+ break;
+ case 'F':
+ do_file = 1;
+ if (optarg)
+ filename = optarg;
+ break;
+ case 'h':
+ usage(argv[0]);
+ return 0;
+ case 'i':
+ do_set_input = 1;
+ input = atoi(optarg);
+ break;
+ case 'l':
+ do_list_controls = 1;
+ break;
+ case 'n':
+ nbufs = atoi(optarg);
+ if (nbufs > V4L_BUFFERS_MAX)
+ nbufs = V4L_BUFFERS_MAX;
+ break;
+ case 'p':
+ do_pause = 1;
+ break;
+ case 'q':
+ quality = atoi(optarg);
+ break;
+ case 'r':
+ ctrl_name = strtol(optarg, &endptr, 0);
+ if (*endptr != 0) {
+ printf("Invalid control name '%s'\n", optarg);
+ return 1;
+ }
+ do_get_control = 1;
+ break;
+ case 's':
+ do_set_format = 1;
+ width = strtol(optarg, &endptr, 10);
+ if (*endptr != 'x' || endptr == optarg) {
+ printf("Invalid size '%s'\n", optarg);
+ return 1;
+ }
+ height = strtol(endptr + 1, &endptr, 10);
+ if (*endptr != 0) {
+ printf("Invalid size '%s'\n", optarg);
+ return 1;
+ }
+ break;
+ case 't':
+ do_set_time_per_frame = 1;
+ time_per_frame.numerator = strtol(optarg, &endptr, 10);
+ if (*endptr != '/' || endptr == optarg) {
+ printf("Invalid time per frame '%s'\n", optarg);
+ return 1;
+ }
+ time_per_frame.denominator = strtol(endptr + 1, &endptr, 10);
+ if (*endptr != 0) {
+ printf("Invalid time per frame '%s'\n", optarg);
+ return 1;
+ }
+ break;
+ case 'u':
+ memtype = V4L2_MEMORY_USERPTR;
+ break;
+ case 'w':
+ ctrl_name = strtol(optarg, &endptr, 0);
+ if (*endptr != ' ' || endptr == optarg) {
+ printf("Invalid control name '%s'\n", optarg);
+ return 1;
+ }
+ ctrl_value = strtol(endptr + 1, &endptr, 0);
+ if (*endptr != 0) {
+ printf("Invalid control value '%s'\n", optarg);
+ return 1;
+ }
+ do_set_control = 1;
+ break;
+ case OPT_ENUM_FORMATS:
+ do_enum_formats = 1;
+ break;
+ case OPT_ENUM_INPUTS:
+ do_enum_inputs = 1;
+ break;
+ case OPT_NO_QUERY:
+ no_query = 1;
+ break;
+ case OPT_SKIP_FRAMES:
+ skip = atoi(optarg);
+ break;
+ case OPT_SLEEP_FOREVER:
+ do_sleep_forever = 1;
+ break;
+ default:
+ printf("Invalid option -%c\n", c);
+ printf("Run %s -h for help.\n", argv[0]);
+ return 1;
+ }
+ }
+
+ if (optind >= argc) {
+ usage(argv[0]);
+ return 1;
+ }
+
+ if (!do_file)
+ filename = NULL;
+
+ /* Open the video device. */
+ ret = video_open(&dev, argv[optind], no_query);
+ if (ret < 0)
+ return 1;
+
+ dev.memtype = memtype;
+
+ if (do_get_control)
+ uvc_get_control(&dev, ctrl_name);
+ if (do_set_control)
+ uvc_set_control(&dev, ctrl_name, ctrl_value);
+
+ if (do_list_controls)
+ video_list_controls(&dev);
+
+ if (do_enum_formats) {
+ printf("- Available formats:\n");
+ video_enum_formats(&dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
+ video_enum_formats(&dev, V4L2_BUF_TYPE_VIDEO_OUTPUT);
+ video_enum_formats(&dev, V4L2_BUF_TYPE_VIDEO_OVERLAY);
+ }
+
+ if (do_enum_inputs) {
+ printf("- Available inputs:\n");
+ video_enum_inputs(&dev);
+ }
+
+ if (do_set_input) {
+ video_set_input(&dev, input);
+ ret = video_get_input(&dev);
+ printf("Input %d selected\n", ret);
+ }
+
+ /* Set the video format. */
+ if (do_set_format) {
+ if (video_set_format(&dev, width, height, pixelformat) < 0) {
+ video_close(&dev);
+ return 1;
+ }
+ }
+
+ if (!no_query)
+ video_get_format(&dev);
+
+ /* Set the frame rate. */
+ if (do_set_time_per_frame) {
+ if (video_set_framerate(&dev, &time_per_frame) < 0) {
+ video_close(&dev);
+ return 1;
+ }
+ }
+
+ while (do_sleep_forever)
+ sleep(1000);
+
+ if (!do_capture) {
+ video_close(&dev);
+ return 0;
+ }
+
+ /* Set the compression quality. */
+ if (video_set_quality(&dev, quality) < 0) {
+ video_close(&dev);
+ return 1;
+ }
+
+ if (video_prepare_capture(&dev, nbufs)) {
+ video_close(&dev);
+ return 1;
+ }
+
+ if (do_pause) {
+ printf("Press enter to start capture\n");
+ getchar();
+ }
+
+ if (video_do_capture(&dev, nframes, skip, delay, filename) < 0) {
+ video_close(&dev);
+ return 1;
+ }
+
+ video_close(&dev);
+ return 0;
+}
+