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/*
v4l-ioctl-test - This small utility sends dumb v4l2 ioctl to a device.
It is meant to check ioctl debug messages generated and to check
if a function is implemented by that device.
Copyright (C) 2005 Mauro Carvalho Chehab <mchehab@infradead.org>
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#define __OLD_VIDIOC_
#include "linux/videodev.h"
/* All possible parameters used on v4l ioctls */
union v4l_parms {
int i;
unsigned long ulong;
u_int32_t u32;
v4l2_std_id id;
enum v4l2_priority prio;
#ifdef CONFIG_VIDEO_V4L1_COMPAT
/* V4L1 structs */
struct video_capability p_video_capability;
struct video_channel p_video_channel;
struct video_tuner p_video_tuner;
struct video_picture p_video_picture;
struct video_window p_video_window;
struct video_buffer p_video_buffer;
struct video_key p_video_key;
struct video_audio p_video_audio;
struct video_mmap p_video_mmap;
struct video_mbuf p_video_mbuf;
struct video_unit p_video_unit;
struct video_capture p_video_capture;
struct video_play_mode p_video_play_mode;
struct video_info p_video_info;
struct video_code p_video_code;
struct vbi_format p_vbi_format;
#endif
/* V4L2 structs */
struct v4l2_capability p_v4l2_capability;
struct v4l2_fmtdesc p_v4l2_fmtdesc;
struct v4l2_format p_v4l2_format;
struct v4l2_requestbuffers p_v4l2_requestbuffers;
struct v4l2_buffer p_v4l2_buffer;
struct v4l2_framebuffer p_v4l2_framebuffer;
struct v4l2_streamparm p_v4l2_streamparm;
struct v4l2_standard p_v4l2_standard;
struct v4l2_input p_v4l2_input;
struct v4l2_control p_v4l2_control;
struct v4l2_tuner p_v4l2_tuner;
struct v4l2_audio p_v4l2_audio;
struct v4l2_queryctrl p_v4l2_queryctrl;
struct v4l2_querymenu p_v4l2_querymenu;
struct v4l2_output p_v4l2_output;
struct v4l2_audioout p_v4l2_audioout;
struct v4l2_modulator p_v4l2_modulator;
struct v4l2_frequency p_v4l2_frequency;
struct v4l2_cropcap p_v4l2_cropcap;
struct v4l2_crop p_v4l2_crop;
struct v4l2_jpegcompression p_v4l2_jpegcompression;
struct v4l2_sliced_vbi_cap p_v4l2_sliced_vbi_cap;
struct v4l2_ext_controls p_v4l2_ext_controls;
struct v4l2_frmsizeenum p_v4l2_frmsizeenum;
struct v4l2_frmivalenum p_v4l2_frmivalenum;
struct v4l2_enc_idx p_v4l2_enc_idx;
struct v4l2_encoder_cmd p_v4l2_encoder_cmd;
struct v4l2_dbg_register p_v4l2_dbg_register;
struct v4l2_dbg_chip_ident p_v4l2_dbg_chip_ident;
struct v4l2_hw_freq_seek p_v4l2_hw_freq_seek;
};
#define ioc(cmd) { cmd, #cmd }
/* All defined ioctls */
static const struct {
u_int32_t cmd;
const char *name;
} ioctls[] = {
#ifdef CONFIG_VIDEO_V4L1_COMPAT
/* V4L1 ioctls */
ioc(VIDIOCGCAP), /* struct video_capability */
ioc(VIDIOCGCHAN), /* struct video_channel */
ioc(VIDIOCSCHAN), /* struct video_channel */
ioc(VIDIOCGTUNER), /* struct video_tuner */
ioc(VIDIOCSTUNER), /* struct video_tuner */
ioc(VIDIOCGPICT), /* struct video_picture */
ioc(VIDIOCSPICT), /* struct video_picture */
ioc(VIDIOCCAPTURE), /* int */
ioc(VIDIOCGWIN), /* struct video_window */
ioc(VIDIOCSWIN), /* struct video_window */
ioc(VIDIOCGFBUF), /* struct video_buffer */
ioc(VIDIOCSFBUF), /* struct video_buffer */
ioc(VIDIOCKEY), /* struct video_key */
ioc(VIDIOCGFREQ), /* unsigned long */
ioc(VIDIOCSFREQ), /* unsigned long */
ioc(VIDIOCGAUDIO), /* struct video_audio */
ioc(VIDIOCSAUDIO), /* struct video_audio */
ioc(VIDIOCSYNC), /* int */
ioc(VIDIOCMCAPTURE), /* struct video_mmap */
ioc(VIDIOCGMBUF), /* struct video_mbuf */
ioc(VIDIOCGUNIT), /* struct video_unit */
ioc(VIDIOCGCAPTURE), /* struct video_capture */
ioc(VIDIOCSCAPTURE), /* struct video_capture */
ioc(VIDIOCSPLAYMODE), /* struct video_play_mode */
ioc(VIDIOCSWRITEMODE), /* int */
ioc(VIDIOCGPLAYINFO), /* struct video_info */
ioc(VIDIOCSMICROCODE), /* struct video_code */
ioc(VIDIOCGVBIFMT), /* struct vbi_format */
ioc(VIDIOCSVBIFMT), /* struct vbi_format */
#endif
/* V4L2 ioctls */
ioc(VIDIOC_QUERYCAP), /* struct v4l2_capability */
ioc(VIDIOC_RESERVED),
ioc(VIDIOC_ENUM_FMT), /* struct v4l2_fmtdesc */
ioc(VIDIOC_G_FMT), /* struct v4l2_format */
ioc(VIDIOC_S_FMT), /* struct v4l2_format */
ioc(VIDIOC_REQBUFS), /* struct v4l2_requestbuffers */
ioc(VIDIOC_QUERYBUF), /* struct v4l2_buffer */
ioc(VIDIOC_G_FBUF), /* struct v4l2_framebuffer */
ioc(VIDIOC_S_FBUF), /* struct v4l2_framebuffer */
ioc(VIDIOC_OVERLAY), /* int */
ioc(VIDIOC_QBUF), /* struct v4l2_buffer */
ioc(VIDIOC_DQBUF), /* struct v4l2_buffer */
ioc(VIDIOC_STREAMON), /* int */
ioc(VIDIOC_STREAMOFF), /* int */
ioc(VIDIOC_G_PARM), /* struct v4l2_streamparm */
ioc(VIDIOC_S_PARM), /* struct v4l2_streamparm */
ioc(VIDIOC_G_STD), /* v4l2_std_id */
ioc(VIDIOC_S_STD), /* v4l2_std_id */
ioc(VIDIOC_ENUMSTD), /* struct v4l2_standard */
ioc(VIDIOC_ENUMINPUT), /* struct v4l2_input */
ioc(VIDIOC_G_CTRL), /* struct v4l2_control */
ioc(VIDIOC_S_CTRL), /* struct v4l2_control */
ioc(VIDIOC_G_TUNER), /* struct v4l2_tuner */
ioc(VIDIOC_S_TUNER), /* struct v4l2_tuner */
ioc(VIDIOC_G_AUDIO), /* struct v4l2_audio */
ioc(VIDIOC_S_AUDIO), /* struct v4l2_audio */
ioc(VIDIOC_QUERYCTRL), /* struct v4l2_queryctrl */
ioc(VIDIOC_QUERYMENU), /* struct v4l2_querymenu */
ioc(VIDIOC_G_INPUT), /* int */
ioc(VIDIOC_S_INPUT), /* int */
ioc(VIDIOC_G_OUTPUT), /* int */
ioc(VIDIOC_S_OUTPUT), /* int */
ioc(VIDIOC_ENUMOUTPUT), /* struct v4l2_output */
ioc(VIDIOC_G_AUDOUT), /* struct v4l2_audioout */
ioc(VIDIOC_S_AUDOUT), /* struct v4l2_audioout */
ioc(VIDIOC_G_MODULATOR), /* struct v4l2_modulator */
ioc(VIDIOC_S_MODULATOR), /* struct v4l2_modulator */
ioc(VIDIOC_G_FREQUENCY), /* struct v4l2_frequency */
ioc(VIDIOC_S_FREQUENCY), /* struct v4l2_frequency */
ioc(VIDIOC_CROPCAP), /* struct v4l2_cropcap */
ioc(VIDIOC_G_CROP), /* struct v4l2_crop */
ioc(VIDIOC_S_CROP), /* struct v4l2_crop */
ioc(VIDIOC_G_JPEGCOMP), /* struct v4l2_jpegcompression */
ioc(VIDIOC_S_JPEGCOMP), /* struct v4l2_jpegcompression */
ioc(VIDIOC_QUERYSTD), /* v4l2_std_id */
ioc(VIDIOC_TRY_FMT), /* struct v4l2_format */
ioc(VIDIOC_ENUMAUDIO), /* struct v4l2_audio */
ioc(VIDIOC_ENUMAUDOUT), /* struct v4l2_audioout */
ioc(VIDIOC_G_PRIORITY), /* enum v4l2_priority */
ioc(VIDIOC_S_PRIORITY), /* enum v4l2_priority */
ioc(VIDIOC_G_SLICED_VBI_CAP), /* struct v4l2_sliced_vbi_cap */
ioc(VIDIOC_LOG_STATUS),
ioc(VIDIOC_G_EXT_CTRLS), /* struct v4l2_ext_controls */
ioc(VIDIOC_S_EXT_CTRLS), /* struct v4l2_ext_controls */
ioc(VIDIOC_TRY_EXT_CTRLS), /* struct v4l2_ext_controls */
ioc(VIDIOC_ENUM_FRAMESIZES), /* struct v4l2_frmsizeenum */
ioc(VIDIOC_ENUM_FRAMEINTERVALS),/* struct v4l2_frmivalenum */
ioc(VIDIOC_G_ENC_INDEX), /* struct v4l2_enc_idx */
ioc(VIDIOC_ENCODER_CMD), /* struct v4l2_encoder_cmd */
ioc(VIDIOC_TRY_ENCODER_CMD), /* struct v4l2_encoder_cmd */
ioc(VIDIOC_DBG_S_REGISTER), /* struct v4l2_register */
ioc(VIDIOC_DBG_G_REGISTER), /* struct v4l2_register */
ioc(VIDIOC_DBG_G_CHIP_IDENT), /* struct v4l2_dbg_chip_ident */
ioc(VIDIOC_S_HW_FREQ_SEEK), /* struct v4l2_hw_freq_seek */
#ifdef __OLD_VIDIOC_
ioc(VIDIOC_OVERLAY_OLD), /* int */
ioc(VIDIOC_S_PARM_OLD), /* struct v4l2_streamparm */
ioc(VIDIOC_S_CTRL_OLD), /* struct v4l2_control */
ioc(VIDIOC_G_AUDIO_OLD), /* struct v4l2_audio */
ioc(VIDIOC_G_AUDOUT_OLD), /* struct v4l2_audioout */
ioc(VIDIOC_CROPCAP_OLD), /* struct v4l2_cropcap */
#endif
};
#define S_IOCTLS sizeof(ioctls)/sizeof(ioctls[0])
/********************************************************************/
int main(int argc, char **argv)
{
int fd = 0, ret = 0;
unsigned i;
unsigned maxlen = 0;
char *device = "/dev/video0";
char marker[8] = { 0xde, 0xad, 0xbe, 0xef, 0xad, 0xbc, 0xcb, 0xda };
char p[sizeof(union v4l_parms) + 2 * sizeof(marker)];
static const char *dirs[] = {
" IO",
" IOW",
" IOR",
"IOWR"
};
if (argv[1])
device = argv[1];
if ((fd = open(device, O_RDONLY)) < 0) {
fprintf(stderr, "Couldn't open %s\n", device);
return -1;
}
for (i = 0; i < S_IOCTLS; i++) {
if (strlen(ioctls[i].name) > maxlen)
maxlen = strlen(ioctls[i].name);
}
for (i = 0; i < S_IOCTLS; i++) {
char buf[maxlen + 100];
const char *name = ioctls[i].name;
u_int32_t cmd = ioctls[i].cmd;
int dir = _IOC_DIR(cmd);
char type = _IOC_TYPE(cmd);
int nr = _IOC_NR(cmd);
int sz = _IOC_SIZE(cmd);
/* Check whether the front and back markers aren't overwritten.
Useful to verify the compat32 code. */
memset(&p, 0, sizeof(p));
memcpy(p, marker, sizeof(marker));
memcpy(p + sz + sizeof(marker), marker, sizeof(marker));
sprintf(buf, "ioctl 0x%08x = %s('%c', %2d, %4d) = %-*s",
cmd, dirs[dir], type, nr, sz, maxlen, name);
errno = 0;
ret = ioctl(fd, cmd, (void *)&p[sizeof(marker)]);
perror(buf);
if (memcmp(p, marker, sizeof(marker)))
fprintf(stderr, "%s: front marker overwritten!\n", name);
if (memcmp(p + sizeof(marker) + sz, marker, sizeof(marker)))
fprintf(stderr, "%s: back marker overwritten!\n", name);
}
close (fd);
return 0;
}
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