summaryrefslogtreecommitdiff
path: root/v4l2-apps/libv4l/libv4l2/log.c
blob: 251b46ecf2e6cf7f26ebedcf4b1ff094b20c0d30 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
/*
#             (C) 2008 Elmar Kleijn <elmar_kleijn@hotmail.com>
#             (C) 2008 Sjoerd Piepenbrink <need4weed@gmail.com>
#             (C) 2008 Hans de Goede <hdegoede@redhat.com>

# This program 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.
#
# 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <linux/ioctl.h>
/* These headers are not needed by us, but by linux/videodev2.h,
   which is broken on some systems and doesn't include them itself :( */
#include <sys/time.h>
#include <asm/types.h>
/* end broken header workaround includes */
#include <linux/videodev2.h>
#include "libv4l2.h"
#include "libv4l2-priv.h"

#define ARRAY_SIZE(x) (sizeof(x)/sizeof((x)[0]))

FILE *v4l2_log_file = NULL;

static const char *v4l2_ioctls[] = {
	/* start v4l2 ioctls */
	[_IOC_NR(VIDIOC_QUERYCAP)]         = "VIDIOC_QUERYCAP",
	[_IOC_NR(VIDIOC_RESERVED)]         = "VIDIOC_RESERVED",
	[_IOC_NR(VIDIOC_ENUM_FMT)]         = "VIDIOC_ENUM_FMT",
	[_IOC_NR(VIDIOC_G_FMT)]            = "VIDIOC_G_FMT",
	[_IOC_NR(VIDIOC_S_FMT)]            = "VIDIOC_S_FMT",
	[_IOC_NR(VIDIOC_REQBUFS)]          = "VIDIOC_REQBUFS",
	[_IOC_NR(VIDIOC_QUERYBUF)]         = "VIDIOC_QUERYBUF",
	[_IOC_NR(VIDIOC_G_FBUF)]           = "VIDIOC_G_FBUF",
	[_IOC_NR(VIDIOC_S_FBUF)]           = "VIDIOC_S_FBUF",
	[_IOC_NR(VIDIOC_OVERLAY)]          = "VIDIOC_OVERLAY",
	[_IOC_NR(VIDIOC_QBUF)]             = "VIDIOC_QBUF",
	[_IOC_NR(VIDIOC_DQBUF)]            = "VIDIOC_DQBUF",
	[_IOC_NR(VIDIOC_STREAMON)]         = "VIDIOC_STREAMON",
	[_IOC_NR(VIDIOC_STREAMOFF)]        = "VIDIOC_STREAMOFF",
	[_IOC_NR(VIDIOC_G_PARM)]           = "VIDIOC_G_PARM",
	[_IOC_NR(VIDIOC_S_PARM)]           = "VIDIOC_S_PARM",
	[_IOC_NR(VIDIOC_G_STD)]            = "VIDIOC_G_STD",
	[_IOC_NR(VIDIOC_S_STD)]            = "VIDIOC_S_STD",
	[_IOC_NR(VIDIOC_ENUMSTD)]          = "VIDIOC_ENUMSTD",
	[_IOC_NR(VIDIOC_ENUMINPUT)]        = "VIDIOC_ENUMINPUT",
	[_IOC_NR(VIDIOC_G_CTRL)]           = "VIDIOC_G_CTRL",
	[_IOC_NR(VIDIOC_S_CTRL)]           = "VIDIOC_S_CTRL",
	[_IOC_NR(VIDIOC_G_TUNER)]          = "VIDIOC_G_TUNER",
	[_IOC_NR(VIDIOC_S_TUNER)]          = "VIDIOC_S_TUNER",
	[_IOC_NR(VIDIOC_G_AUDIO)]          = "VIDIOC_G_AUDIO",
	[_IOC_NR(VIDIOC_S_AUDIO)]          = "VIDIOC_S_AUDIO",
	[_IOC_NR(VIDIOC_QUERYCTRL)]        = "VIDIOC_QUERYCTRL",
	[_IOC_NR(VIDIOC_QUERYMENU)]        = "VIDIOC_QUERYMENU",
	[_IOC_NR(VIDIOC_G_INPUT)]          = "VIDIOC_G_INPUT",
	[_IOC_NR(VIDIOC_S_INPUT)]          = "VIDIOC_S_INPUT",
	[_IOC_NR(VIDIOC_G_OUTPUT)]         = "VIDIOC_G_OUTPUT",
	[_IOC_NR(VIDIOC_S_OUTPUT)]         = "VIDIOC_S_OUTPUT",
	[_IOC_NR(VIDIOC_ENUMOUTPUT)]       = "VIDIOC_ENUMOUTPUT",
	[_IOC_NR(VIDIOC_G_AUDOUT)]         = "VIDIOC_G_AUDOUT",
	[_IOC_NR(VIDIOC_S_AUDOUT)]         = "VIDIOC_S_AUDOUT",
	[_IOC_NR(VIDIOC_G_MODULATOR)]      = "VIDIOC_G_MODULATOR",
	[_IOC_NR(VIDIOC_S_MODULATOR)]      = "VIDIOC_S_MODULATOR",
	[_IOC_NR(VIDIOC_G_FREQUENCY)]      = "VIDIOC_G_FREQUENCY",
	[_IOC_NR(VIDIOC_S_FREQUENCY)]      = "VIDIOC_S_FREQUENCY",
	[_IOC_NR(VIDIOC_CROPCAP)]          = "VIDIOC_CROPCAP",
	[_IOC_NR(VIDIOC_G_CROP)]           = "VIDIOC_G_CROP",
	[_IOC_NR(VIDIOC_S_CROP)]           = "VIDIOC_S_CROP",
	[_IOC_NR(VIDIOC_G_JPEGCOMP)]       = "VIDIOC_G_JPEGCOMP",
	[_IOC_NR(VIDIOC_S_JPEGCOMP)]       = "VIDIOC_S_JPEGCOMP",
	[_IOC_NR(VIDIOC_QUERYSTD)]         = "VIDIOC_QUERYSTD",
	[_IOC_NR(VIDIOC_TRY_FMT)]          = "VIDIOC_TRY_FMT",
	[_IOC_NR(VIDIOC_ENUMAUDIO)]        = "VIDIOC_ENUMAUDIO",
	[_IOC_NR(VIDIOC_ENUMAUDOUT)]       = "VIDIOC_ENUMAUDOUT",
	[_IOC_NR(VIDIOC_G_PRIORITY)]       = "VIDIOC_G_PRIORITY",
	[_IOC_NR(VIDIOC_S_PRIORITY)]       = "VIDIOC_S_PRIORITY",
	[_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP",
	[_IOC_NR(VIDIOC_LOG_STATUS)]       = "VIDIOC_LOG_STATUS",
	[_IOC_NR(VIDIOC_G_EXT_CTRLS)]      = "VIDIOC_G_EXT_CTRLS",
	[_IOC_NR(VIDIOC_S_EXT_CTRLS)]      = "VIDIOC_S_EXT_CTRLS",
	[_IOC_NR(VIDIOC_TRY_EXT_CTRLS)]    = "VIDIOC_TRY_EXT_CTRLS",
#ifdef VIDIOC_ENUM_FRAMESIZES
	[_IOC_NR(VIDIOC_ENUM_FRAMESIZES)]  = "VIDIOC_ENUM_FRAMESIZES",
	[_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
#endif
};

void v4l2_log_ioctl(unsigned long int request, void *arg, int result)
{
  const char *ioctl_str;
  char buf[40];
  int saved_errno = errno;

  if (!v4l2_log_file)
    return;

  if (_IOC_TYPE(request) == 'V' && _IOC_NR(request) < ARRAY_SIZE(v4l2_ioctls))
    ioctl_str = v4l2_ioctls[_IOC_NR(request)];
  else {
    snprintf(buf, sizeof(buf), "unknown request: %c %d",
      (int)_IOC_TYPE(request), (int)_IOC_NR(request));
    ioctl_str = buf;
  }

  fprintf(v4l2_log_file, "request == %s\n", ioctl_str);

  switch (request) {
    case VIDIOC_ENUM_FMT:
      {
	struct v4l2_fmtdesc *fmt = arg;
	fprintf(v4l2_log_file, "  index: %u, description: %s\n",
	  fmt->index, (result < 0) ? "" : (const char *)fmt->description);
      }
      break;
    case VIDIOC_G_FMT:
    case VIDIOC_S_FMT:
    case VIDIOC_TRY_FMT:
      {
	struct v4l2_format *fmt = arg;
	int pixfmt = fmt->fmt.pix.pixelformat;

	if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
	  fprintf(v4l2_log_file, "  pixelformat: %c%c%c%c %ux%u\n",
	    pixfmt & 0xff,
	    (pixfmt >> 8) & 0xff,
	    (pixfmt >> 16) & 0xff,
	    pixfmt >> 24,
	    fmt->fmt.pix.width,
	    fmt->fmt.pix.height);
	  fprintf(v4l2_log_file, "  field: %d bytesperline: %d imagesize%d\n",
	    (int)fmt->fmt.pix.field, (int)fmt->fmt.pix.bytesperline,
	    (int)fmt->fmt.pix.sizeimage);
	  fprintf(v4l2_log_file, "  colorspace: %d, priv: %x\n",
	    (int)fmt->fmt.pix.colorspace, (int)fmt->fmt.pix.priv);
	}
      }
      break;
    case VIDIOC_REQBUFS:
      {
	struct v4l2_requestbuffers *req = arg;

	fprintf(v4l2_log_file, "  count: %u type: %d memory: %d\n",
	  req->count, (int)req->type, (int)req->memory);
      }
      break;
#ifdef VIDIOC_ENUM_FRAMESIZES
    case VIDIOC_ENUM_FRAMESIZES:
      {
	struct v4l2_frmsizeenum *frmsize = arg;
	int pixfmt = frmsize->pixel_format;

	fprintf(v4l2_log_file, "  index: %u pixelformat: %c%c%c%c",
	  frmsize->index,
	  pixfmt & 0xff,
	  (pixfmt >> 8) & 0xff,
	  (pixfmt >> 16) & 0xff,
	  pixfmt >> 24);
	switch (frmsize->type) {
	  case V4L2_FRMSIZE_TYPE_DISCRETE:
	    fprintf(v4l2_log_file, " %ux%u\n", frmsize->discrete.width,
	      frmsize->discrete.height);
	    break;
	  case V4L2_FRMSIZE_TYPE_CONTINUOUS:
	  case V4L2_FRMSIZE_TYPE_STEPWISE:
	    fprintf(v4l2_log_file, " %ux%u -> %ux%u\n",
	      frmsize->stepwise.min_width, frmsize->stepwise.min_height,
	      frmsize->stepwise.max_width, frmsize->stepwise.max_height);
	    break;
	}
      }
      break;
    case VIDIOC_ENUM_FRAMEINTERVALS:
      {
	struct v4l2_frmivalenum *frmival = arg;
	int pixfmt = frmival->pixel_format;

	fprintf(v4l2_log_file, "  index: %u pixelformat: %c%c%c%c %ux%u: ",
	  frmival->index,
	  pixfmt & 0xff,
	  (pixfmt >> 8) & 0xff,
	  (pixfmt >> 16) & 0xff,
	  pixfmt >> 24,
	  frmival->width,
	  frmival->height);
	switch (frmival->type) {
	  case V4L2_FRMIVAL_TYPE_DISCRETE:
	    fprintf(v4l2_log_file, "%u/%u\n", frmival->discrete.numerator,
	      frmival->discrete.denominator);
	    break;
	  case V4L2_FRMIVAL_TYPE_CONTINUOUS:
	  case V4L2_FRMIVAL_TYPE_STEPWISE:
	    fprintf(v4l2_log_file, "%u/%u -> %u/%u\n",
	      frmival->stepwise.min.numerator,
	      frmival->stepwise.min.denominator,
	      frmival->stepwise.max.numerator,
	      frmival->stepwise.max.denominator);
	    break;
	}
      }
      break;
#endif
  }

  if (result < 0)
    fprintf(v4l2_log_file, "result == %d (%s)\n", result, strerror(saved_errno));
  else
    fprintf(v4l2_log_file, "result == %d\n", result);

  fflush(v4l2_log_file);
}