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-rw-r--r--v4l2-apps/test/Makefile7
-rw-r--r--v4l2-apps/test/v4l2grab.c155
-rw-r--r--v4l2-apps/util/v4l2-ctl.cpp78
3 files changed, 240 insertions, 0 deletions
diff --git a/v4l2-apps/test/Makefile b/v4l2-apps/test/Makefile
index d118b9210..71eaa77cf 100644
--- a/v4l2-apps/test/Makefile
+++ b/v4l2-apps/test/Makefile
@@ -7,6 +7,7 @@ binaries = ioctl-test \
sliced-vbi-detect \
vbi-test \
v4lgrab \
+ v4l2grab \
driver-test \
pixfmt-test \
stress-buffer \
@@ -24,9 +25,15 @@ install:
../libv4l2util/libv4l2util.a: ../libv4l2util/v4l2_driver.c ../libv4l2util/frequencies.c
make -C ../libv4l2util libv4l2util.a
+../libv4l/libv4l2/libv4l2.so:
+ make -C ../libv4l/
+
driver-test: driver-test.o ../libv4l2util/libv4l2util.a
pixfmt-test: pixfmt-test.o
$(CC) $(LDFLAGS) $^ $(LOADLIBES) $(LDLIBS) -o $@ -lX11
+v4l2grab: v4l2grab.o
+ $(CC) $(LDFLAGS) $^ -o $@ ../libv4l/libv4l2/libv4l2.so
+
include ../Make.rules
diff --git a/v4l2-apps/test/v4l2grab.c b/v4l2-apps/test/v4l2grab.c
new file mode 100644
index 000000000..20692117e
--- /dev/null
+++ b/v4l2-apps/test/v4l2grab.c
@@ -0,0 +1,155 @@
+/* V4L2 video picture grabber
+ Copyright (C) 2006 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 version 2 of the License.
+
+ 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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/mman.h>
+#include <linux/videodev2.h>
+#include "../libv4l/include/libv4l2.h"
+
+#define CLEAR(x) memset(&(x), 0, sizeof(x))
+
+struct buffer {
+ void *start;
+ size_t length;
+};
+
+static void xioctl(int fh, int request, void *arg)
+{
+ int r;
+
+ do {
+ r = v4l2_ioctl(fh, request, arg);
+ } while (r == -1 && ((errno == EINTR) || (errno == EAGAIN)));
+
+ if (r == -1) {
+ fprintf(stderr, "error %d, %s\n", errno, strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+}
+
+int main(int argc, char **argv)
+{
+ struct v4l2_format fmt;
+ struct v4l2_buffer buf;
+ struct v4l2_requestbuffers req;
+ enum v4l2_buf_type type;
+ fd_set fds;
+ struct timeval tv;
+ int r, fd = -1;
+ unsigned int i, n_buffers;
+ char *dev_name = "/dev/video0";
+ char out_name[256];
+ FILE *fout;
+ struct buffer *buffers;
+
+ fd = v4l2_open(dev_name, O_RDWR | O_NONBLOCK, 0);
+ if (fd < 0) {
+ perror("Cannot open device");
+ exit(EXIT_FAILURE);
+ }
+
+ CLEAR(fmt);
+ fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ fmt.fmt.pix.width = 640;
+ fmt.fmt.pix.height = 480;
+ fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_RGB24;
+ fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
+ xioctl(fd, VIDIOC_S_FMT, &fmt);
+
+ CLEAR(req);
+ req.count = 2;
+ req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ req.memory = V4L2_MEMORY_MMAP;
+ xioctl(fd, VIDIOC_REQBUFS, &req);
+
+ buffers = calloc(req.count, sizeof(*buffers));
+ for (n_buffers = 0; n_buffers < req.count; ++n_buffers) {
+ CLEAR(buf);
+
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_MMAP;
+ buf.index = n_buffers;
+
+ xioctl(fd, VIDIOC_QUERYBUF, &buf);
+
+ buffers[n_buffers].length = buf.length;
+ buffers[n_buffers].start = v4l2_mmap(NULL, buf.length,
+ PROT_READ | PROT_WRITE, MAP_SHARED,
+ fd, buf.m.offset);
+
+ if (MAP_FAILED == buffers[n_buffers].start) {
+ perror("mmap");
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ for (i = 0; i < n_buffers; ++i) {
+ CLEAR(buf);
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_MMAP;
+ buf.index = i;
+ xioctl(fd, VIDIOC_QBUF, &buf);
+ }
+ type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+ xioctl(fd, VIDIOC_STREAMON, &type);
+ for (i = 0; i < 20; i++) {
+ do {
+ FD_ZERO(&fds);
+ FD_SET(fd, &fds);
+
+ /* Timeout. */
+ tv.tv_sec = 2;
+ tv.tv_usec = 0;
+
+ r = select(fd + 1, &fds, NULL, NULL, &tv);
+ } while ((r == -1 && (errno = EINTR)));
+ if (r == -1) {
+ perror("select");
+ return errno;
+ }
+
+ CLEAR(buf);
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_MMAP;
+ xioctl(fd, VIDIOC_DQBUF, &buf);
+
+ sprintf(out_name, "out%03d.ppm", i);
+ fout = fopen(out_name, "w");
+ if (!fout) {
+ perror("Cannot open image");
+ exit(EXIT_FAILURE);
+ }
+ fprintf(fout, "P6\n%d %d 255\n",
+ fmt.fmt.pix.width, fmt.fmt.pix.height);
+ fwrite(buffers[buf.index].start, buf.bytesused, 1, fout);
+ fclose(fout);
+
+ xioctl(fd, VIDIOC_QBUF, &buf);
+ }
+
+ type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ xioctl(fd, VIDIOC_STREAMOFF, &type);
+ for (i = 0; i < n_buffers; ++i)
+ v4l2_munmap(buffers[i].start, buffers[i].length);
+ v4l2_close(fd);
+
+ return 0;
+}
diff --git a/v4l2-apps/util/v4l2-ctl.cpp b/v4l2-apps/util/v4l2-ctl.cpp
index dec9edd61..309e14312 100644
--- a/v4l2-apps/util/v4l2-ctl.cpp
+++ b/v4l2-apps/util/v4l2-ctl.cpp
@@ -131,6 +131,8 @@ enum Option {
OptOverlay,
OptGetJpegComp,
OptSetJpegComp,
+ OptGetModulator,
+ OptSetModulator,
OptListDevices,
OptLast = 256
};
@@ -260,6 +262,8 @@ static struct option long_options[] = {
{"set-crop-output-overlay", required_argument, 0, OptSetOutputOverlayCrop},
{"get-jpeg-comp", no_argument, 0, OptGetJpegComp},
{"set-jpeg-comp", required_argument, 0, OptSetJpegComp},
+ {"get-modulator", no_argument, 0, OptGetModulator},
+ {"set-modulator", required_argument, 0, OptSetModulator},
{"overlay", required_argument, 0, OptOverlay},
{"list-devices", no_argument, 0, OptListDevices},
{0, 0, 0, 0}
@@ -404,6 +408,15 @@ static void usage(void)
" display audio outputs [VIDIOC_ENUMAUDOUT]\n"
" --list-audio-inputs\n"
" display audio inputs [VIDIOC_ENUMAUDIO]\n"
+ " --get-modulator query the modulator settings [VIDIOC_G_MODULATOR]\n"
+ " --set-modulator=<txsubchans>\n"
+ " set the sub-carrier modulation [VIDIOC_S_MODULATOR]\n"
+ " <txsubchans> is one of:\n"
+ " mono: Modulate as mono\n"
+ " stereo: Modulate as stereo\n"
+ " bilingual: Modulate as bilingual\n"
+ " mono-sap: Modulate as mono with Second Audio Program\n"
+ " stereo-sap: Modulate as stereo with Second Audio Program\n"
"\n");
printf("Expert options:\n"
" --streamoff turn the stream off [VIDIOC_STREAMOFF]\n"
@@ -946,6 +959,21 @@ static std::string rxsubchans2s(int rxsubchans)
return s;
}
+static std::string txsubchans2s(int txsubchans)
+{
+ std::string s;
+
+ if (txsubchans & V4L2_TUNER_SUB_MONO)
+ s += "mono";
+ if (txsubchans & V4L2_TUNER_SUB_STEREO)
+ s += "stereo";
+ if (txsubchans & V4L2_TUNER_SUB_LANG1)
+ s += "bilingual";
+ if (txsubchans & V4L2_TUNER_SUB_SAP)
+ s += "+sap";
+ return s;
+}
+
static std::string tcap2s(unsigned cap)
{
std::string s;
@@ -1384,6 +1412,7 @@ int main(int argc, char **argv)
struct v4l2_jpegcompression jpegcomp; /* jpeg compression */
int input; /* set_input/get_input */
int output; /* set_output/get_output */
+ int txsubchans; /* set_modulator */
v4l2_std_id std; /* get_std/set_std */
double freq = 0; /* get/set frequency */
struct v4l2_frequency vf; /* get_freq/set_freq */
@@ -1695,6 +1724,24 @@ int main(int argc, char **argv)
return 1;
}
break;
+ case OptSetModulator:
+ txsubchans = strtol(optarg, 0L, 0);
+ if (!strcmp(optarg, "stereo"))
+ txsubchans = V4L2_TUNER_SUB_STEREO;
+ else if (!strcmp(optarg, "stereo-sap"))
+ txsubchans = V4L2_TUNER_SUB_STEREO | V4L2_TUNER_SUB_SAP;
+ else if (!strcmp(optarg, "bilingual"))
+ txsubchans = V4L2_TUNER_SUB_LANG1;
+ else if (!strcmp(optarg, "mono"))
+ txsubchans = V4L2_TUNER_SUB_MONO;
+ else if (!strcmp(optarg, "mono-sap"))
+ txsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_SAP;
+ else {
+ fprintf(stderr, "Unknown txsubchans value\n");
+ usage();
+ return 1;
+ }
+ break;
case OptSetSlicedVbiFormat:
case OptSetSlicedVbiOutFormat:
case OptTrySlicedVbiFormat:
@@ -1861,6 +1908,7 @@ int main(int argc, char **argv)
options[OptGetStandard] = 1;
options[OptGetFreq] = 1;
options[OptGetTuner] = 1;
+ options[OptGetModulator] = 1;
options[OptGetOverlayFormat] = 1;
options[OptGetOutputOverlayFormat] = 1;
options[OptGetVbiFormat] = 1;
@@ -1954,6 +2002,16 @@ int main(int argc, char **argv)
}
}
+ if (options[OptSetModulator]) {
+ struct v4l2_modulator mt;
+
+ memset(&mt, 0, sizeof(struct v4l2_modulator));
+ if (doioctl(fd, VIDIOC_G_MODULATOR, &mt, "VIDIOC_G_MODULATOR") == 0) {
+ mt.txsubchans = txsubchans;
+ doioctl(fd, VIDIOC_S_MODULATOR, &mt, "VIDIOC_S_MODULATOR");
+ }
+ }
+
if (options[OptSetVideoFormat] || options[OptTryVideoFormat]) {
struct v4l2_format in_vfmt;
@@ -2403,6 +2461,7 @@ set_vid_fmt_error:
if (options[OptGetTuner]) {
struct v4l2_tuner vt;
+
memset(&vt, 0, sizeof(struct v4l2_tuner));
if (doioctl(fd, VIDIOC_G_TUNER, &vt, "VIDIOC_G_TUNER") == 0) {
printf("Tuner:\n");
@@ -2421,6 +2480,25 @@ set_vid_fmt_error:
}
}
+ if (options[OptGetModulator]) {
+ struct v4l2_modulator mt;
+
+ memset(&mt, 0, sizeof(struct v4l2_modulator));
+ if (doioctl(fd, VIDIOC_G_MODULATOR, &mt, "VIDIOC_G_MODULATOR") == 0) {
+ printf("Modulator:\n");
+ printf("\tName : %s\n", mt.name);
+ printf("\tCapabilities : %s\n", tcap2s(mt.capability).c_str());
+ if (mt.capability & V4L2_TUNER_CAP_LOW)
+ printf("\tFrequency range : %.1f MHz - %.1f MHz\n",
+ mt.rangelow / 16000.0, mt.rangehigh / 16000.0);
+ else
+ printf("\tFrequency range : %.1f MHz - %.1f MHz\n",
+ mt.rangelow / 16.0, mt.rangehigh / 16.0);
+ printf("\tSubchannel modulation: %s\n",
+ txsubchans2s(mt.txsubchans).c_str());
+ }
+ }
+
if (options[OptLogStatus]) {
static char buf[40960];
int len;
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-30 15:38:07 +0000