---
Makefile.am | 3 +-
configure.ac | 1 +
utils/rds-ctl/Makefile.am | 5 +
utils/rds-ctl/rds-ctl.cpp | 959 +++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 967 insertions(+), 1 deletion(-)
create mode 100644 utils/rds-ctl/Makefile.am
create mode 100644 utils/rds-ctl/rds-ctl.cpp
diff --git a/Makefile.am b/Makefile.am
index 621d8d9..8ef0d00 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -18,7 +18,8 @@ SUBDIRS += \
utils/v4l2-compliance \
utils/v4l2-ctl \
utils/v4l2-dbg \
- utils/v4l2-sysfs-path
+ utils/v4l2-sysfs-path \
+ utils/rds-ctl
if LINUX_OS
SUBDIRS += \
diff --git a/configure.ac b/configure.ac
index 1109c4d..a99f1c6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -28,6 +28,7 @@ AC_CONFIG_FILES([Makefile
utils/v4l2-sysfs-path/Makefile
utils/xc3028-firmware/Makefile
utils/qv4l2/Makefile
+ utils/rds-ctl/Makefile
contrib/freebsd/Makefile
contrib/test/Makefile
diff --git a/utils/rds-ctl/Makefile.am b/utils/rds-ctl/Makefile.am
new file mode 100644
index 0000000..9a84257
--- /dev/null
+++ b/utils/rds-ctl/Makefile.am
@@ -0,0 +1,5 @@
+bin_PROGRAMS = rds-ctl
+
+rds_ctl_SOURCES = rds-ctl.cpp
+rds_ctl_LDADD = ../../lib/libv4l2/libv4l2.la ../../lib/libv4l2rds/libv4l2rds.la
+
diff --git a/utils/rds-ctl/rds-ctl.cpp b/utils/rds-ctl/rds-ctl.cpp
new file mode 100644
index 0000000..072ffb7
--- /dev/null
+++ b/utils/rds-ctl/rds-ctl.cpp
@@ -0,0 +1,959 @@
+/*
+ * rds-ctl.cpp is based on v4l2-ctl.cpp
+ *
+ * the following applies for all RDS related parts:
+ * Copyright 2012 Cisco Systems, Inc. and/or its affiliates. All rights
reserved.
+ * Author: Konke Radlow <korad...@gmail.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 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, Suite 500, Boston, MA 02110-1335 USA
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <wchar.h>
+#include <locale.h>
+#include <inttypes.h>
+#include <getopt.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <dirent.h>
+#include <config.h>
+#include <signal.h>
+
+#include <linux/videodev2.h>
+#include <libv4l2.h>
+#include <libv4l2rds.h>
+
+#include <list>
+#include <vector>
+#include <map>
+#include <string>
+#include <algorithm>
+
+#define ARRAY_SIZE(arr) ((int)(sizeof(arr) / sizeof((arr)[0])))
+
+typedef std::vector<std::string> dev_vec;
+typedef std::map<std::string, std::string> dev_map;
+
+/* Short option list
+
+ Please keep in alphabetical order.
+ That makes it easier to see which short options are still free.
+
+ In general the lower case is used to set something and the upper
+ case is used to retrieve a setting. */
+enum Option {
+ OptSetDevice = 'd',
+ OptGetDriverInfo = 'D',
+ OptGetFreq = 'F',
+ OptSetFreq = 'f',
+ OptHelp = 'h',
+ OptReadRds = 'R',
+ OptGetTuner = 'T',
+ OptSetTuner = 't',
+ OptUseWrapper = 'w',
+ OptAll = 128,
+ OptFreqSeek,
+ OptListDevices,
+ OptListFreqBands,
+ OptOpenFile,
+ OptPrintBlock,
+ OptSilent,
+ OptTunerIndex,
+ OptVerbose,
+ OptWaitLimit,
+ OptLast = 256
+};
+
+struct ctl_parameters {
+ bool terminate_decoding;
+ char options[OptLast];
+ char fd_name[80];
+ bool filemode_active;
+ double freq;
+ uint32_t wait_limit;
+ uint8_t tuner_index;
+ struct v4l2_hw_freq_seek freq_seek;
+};
+
+static struct ctl_parameters params;
+static int app_result;
+
+static struct option long_options[] = {
+ {"all", no_argument, 0, OptAll},
+ {"device", required_argument, 0, OptSetDevice},
+ {"file", required_argument, 0, OptOpenFile},
+ {"freq-seek", required_argument, 0, OptFreqSeek},
+ {"get-freq", no_argument, 0, OptGetFreq},
+ {"get-tuner", no_argument, 0, OptGetTuner},
+ {"help", no_argument, 0, OptHelp},
+ {"info", no_argument, 0, OptGetDriverInfo},
+ {"list-devices", no_argument, 0, OptListDevices},
+ {"list-freq-bands", no_argument, 0, OptListFreqBands},
+ {"print-block", no_argument, 0, OptPrintBlock},
+ {"read-rds", no_argument, 0, OptReadRds},
+ {"set-freq", required_argument, 0, OptSetFreq},
+ {"tuner-index", required_argument, 0, OptTunerIndex},
+ {"verbose", no_argument, 0, OptVerbose},
+ {"wait-limit", required_argument, 0, OptWaitLimit},
+ {"wrapper", no_argument, 0, OptUseWrapper},
+ {0, 0, 0, 0}
+};
+
+static void usage_hint(void)
+{
+ fprintf(stderr, "Try 'rds-ctl --help' for more information.\n");
+}
+
+static void usage_common(void)
+{
+ printf("\nGeneral/Common options:\n"
+ " --all display all information available\n"
+ " -D, --info show driver info [VIDIOC_QUERYCAP]\n"
+ " -d, --device=<dev> use device <dev>\n"
+ " if <dev> is a single digit, then
/dev/video<dev> is used\n"
+ " default: checks for RDS-capable devices,\n"
+ " uses device with lowest ID\n"
+ " -h, --help display this help message\n"
+ " -w, --wrapper use the libv4l2 wrapper library.\n"
+ " --list-devices list all v4l radio devices with RDS
capabilities\n"
+ );
+}
+
+static void usage_tuner(void)
+{
+ printf("\nTuner/Modulator options:\n"
+ " -F, --get-freq query the frequency [VIDIOC_G_FREQUENCY]\n"
+ " -f, --set-freq=<freq>\n"
+ " set the frequency to <freq> MHz
[VIDIOC_S_FREQUENCY]\n"
+ " -T, --get-tuner query the tuner settings
[VIDIOC_G_TUNER]\n"
+ " --tuner-index=<idx> Use idx as tuner idx for tuner/modulator
commands\n"
+ " --freq-seek=dir=<0/1>,wrap=<0/1>,spacing=<hz>\n"
+ " perform a hardware frequency seek
[VIDIOC_S_HW_FREQ_SEEK]\n"
+ " dir is 0 (seek downward) or 1 (seek
upward)\n"
+ " wrap is 0 (do not wrap around) or 1 (wrap
around)\n"
+ " spacing sets the seek resolution (use 0
for default)\n"
+ " --list-freq-bands display all frequency bands for the
tuner/modulator\n"
+ " [VIDIOC_ENUM_FREQ_BANDS]\n"
+ );
+}
+
+static void usage_rds(void)
+{
+ printf("\nRDS options: \n"
+ " -R, --read-rds\n"
+ " enable reading of RDS data from device\n"
+ " --file=<path>\n"
+ " open a RDS stream file dump instead of a
device\n"
+ " all General and Tuner Options are disabled
in this mode\n"
+ " --wait-limit=<ms>\n"
+ " defines the maximum wait duration for
avaibility of new\n"
+ " RDS data\n"
+ " <default>: 5000ms\n"
+ " --print-block\n"
+ " prints all valid RDS fields, whenever a
value is updated\n"
+ " instead of printing only updated values\n"
+ " --verbose\n"
+ " turn on verbose mode - every received RDS
group\n"
+ " will be printed\n"
+ );
+}
+
+static void usage(void)
+{
+ printf("Usage:\n");
+ usage_common();
+ usage_tuner();
+ usage_rds();
+}
+
+static void signal_handler_interrupt(int signum)
+{
+ fprintf(stderr, "Interrupt received: Terminating program\n");
+ params.terminate_decoding = true;
+}
+
+static int test_open(const char *file, int oflag)
+{
+ return params.options[OptUseWrapper] ? v4l2_open(file, oflag) :
open(file, oflag);
+}
+
+static int test_close(int fd)
+{
+ return params.options[OptUseWrapper] ? v4l2_close(fd) : close(fd);
+}
+
+static int test_ioctl(int fd, int cmd, void *arg)
+{
+ return params.options[OptUseWrapper] ? v4l2_ioctl(fd, cmd, arg) :
ioctl(fd, cmd, arg);
+}
+
+static int doioctl_name(int fd, unsigned long int request, void *parm, const
char *name)
+{
+ int retval = test_ioctl(fd, request, parm);
+
+ if (retval < 0) {
+ app_result = -1;
+ }
+ if (params.options[OptSilent]) return retval;
+ if (retval < 0)
+ printf("%s: failed: %s\n", name, strerror(errno));
+ else if (params.options[OptVerbose])
+ printf("%s: ok\n", name);
+
+ return retval;
+}
+
+#define doioctl(n, r, p) doioctl_name(n, r, p, #r)
+
+static const char *audmode2s(int audmode)
+{
+ switch (audmode) {
+ case V4L2_TUNER_MODE_STEREO: return "stereo";
+ case V4L2_TUNER_MODE_LANG1: return "lang1";
+ case V4L2_TUNER_MODE_LANG2: return "lang2";
+ case V4L2_TUNER_MODE_LANG1_LANG2: return "bilingual";
+ case V4L2_TUNER_MODE_MONO: return "mono";
+ default: return "unknown";
+ }
+}
+
+static std::string rxsubchans2s(int rxsubchans)
+{
+ std::string s;
+
+ if (rxsubchans & V4L2_TUNER_SUB_MONO)
+ s += "mono ";
+ if (rxsubchans & V4L2_TUNER_SUB_STEREO)
+ s += "stereo ";
+ if (rxsubchans & V4L2_TUNER_SUB_LANG1)
+ s += "lang1 ";
+ if (rxsubchans & V4L2_TUNER_SUB_LANG2)
+ s += "lang2 ";
+ if (rxsubchans & V4L2_TUNER_SUB_RDS)
+ s += "rds ";
+ return s;
+}
+
+static std::string tcap2s(unsigned cap)
+{
+ std::string s;
+
+ if (cap & V4L2_TUNER_CAP_LOW)
+ s += "62.5 Hz ";
+ else
+ s += "62.5 kHz ";
+ if (cap & V4L2_TUNER_CAP_NORM)
+ s += "multi-standard ";
+ if (cap & V4L2_TUNER_CAP_HWSEEK_BOUNDED)
+ s += "hwseek-bounded ";
+ if (cap & V4L2_TUNER_CAP_HWSEEK_WRAP)
+ s += "hwseek-wrap ";
+ if (cap & V4L2_TUNER_CAP_STEREO)
+ s += "stereo ";
+ if (cap & V4L2_TUNER_CAP_LANG1)
+ s += "lang1 ";
+ if (cap & V4L2_TUNER_CAP_LANG2)
+ s += "lang2 ";
+ if (cap & V4L2_TUNER_CAP_RDS)
+ s += "rds ";
+ if (cap & V4L2_TUNER_CAP_RDS_BLOCK_IO)
+ s += "rds block I/O ";
+ if (cap & V4L2_TUNER_CAP_RDS_CONTROLS)
+ s += "rds control ";
+ if (cap & V4L2_TUNER_CAP_FREQ_BANDS)
+ s += "freq-bands ";
+ if (cap & V4L2_TUNER_CAP_HWSEEK_PROG_LIM)
+ s += "hwseek-prog-lim ";
+ return s;
+}
+
+static std::string cap2s(unsigned cap)
+{
+ std::string s;
+
+ if (cap & V4L2_CAP_RDS_CAPTURE)
+ s += "\t\tRDS Capture\n";
+ if (cap & V4L2_CAP_RDS_OUTPUT)
+ s += "\t\tRDS Output\n";
+ if (cap & V4L2_CAP_TUNER)
+ s += "\t\tTuner\n";
+ if (cap & V4L2_CAP_MODULATOR)
+ s += "\t\tModulator\n";
+ if (cap & V4L2_CAP_AUDIO)
+ s += "\t\tAudio\n";
+ if (cap & V4L2_CAP_RADIO)
+ s += "\t\tRadio\n";
+ if (cap & V4L2_CAP_READWRITE)
+ s += "\t\tRead/Write\n";
+ if (cap & V4L2_CAP_ASYNCIO)
+ s += "\t\tAsync I/O\n";
+ if (cap & V4L2_CAP_STREAMING)
+ s += "\t\tStreaming\n";
+ if (cap & V4L2_CAP_DEVICE_CAPS)
+ s += "\t\tDevice Capabilities\n";
+ return s;
+}
+
+static std::string modulation2s(unsigned modulation)
+{
+ switch (modulation) {
+ case V4L2_BAND_MODULATION_VSB:
+ return "VSB";
+ case V4L2_BAND_MODULATION_FM:
+ return "FM";
+ case V4L2_BAND_MODULATION_AM:
+ return "AM";
+ }
+ return "Unknown";
+}
+
+static bool is_radio_dev(const char *name)
+{
+ return !memcmp(name, "radio", 5);
+}
+
+static void print_devices(dev_vec files)
+{
+ dev_map cards;
+ int fd = -1;
+ std::string bus_info;
+ struct v4l2_capability vcap;
+
+ for (dev_vec::iterator iter = files.begin();
+ iter != files.end(); ++iter) {
+ fd = open(iter->c_str(), O_RDWR);
+ memset(&vcap, 0, sizeof(vcap));
+ if (fd < 0)
+ continue;
+ doioctl(fd, VIDIOC_QUERYCAP, &vcap);
+ close(fd);
+ bus_info = (const char *)vcap.bus_info;
+ if (cards[bus_info].empty())
+ cards[bus_info] += std::string((char *)vcap.card)
+ + " (" + bus_info + "):\n";
+ cards[bus_info] += "\t" + (*iter);
+ cards[bus_info] += "\n";
+ }
+ for (dev_map::iterator iter = cards.begin();
+ iter != cards.end(); ++iter) {
+ printf("%s\n", iter->second.c_str());
+ }
+}
+static dev_vec list_devices(void)
+{
+ DIR *dp;
+ struct dirent *ep;
+ dev_vec files;
+ dev_map links;
+
+ struct v4l2_tuner vt;
+
+ dp = opendir("/dev");
+ if (dp == NULL) {
+ perror ("Couldn't open the directory");
+ exit(1);
+ }
+ while ((ep = readdir(dp)))
+ if (is_radio_dev(ep->d_name))
+ files.push_back(std::string("/dev/") + ep->d_name);
+ closedir(dp);
+
+ /* Iterate through all devices, and remove all non-accessible devices
+ * and all devices that don't offer the RDS_BLOCK_IO capability */
+ for (dev_vec::iterator iter = files.begin();
+ iter != files.end(); ++iter) {
+ int fd = open(iter->c_str(), O_RDONLY | O_NONBLOCK);
+ std::string bus_info;
+
+ if (fd < 0) {
+ iter = files.erase(iter);
+ continue;
+ }
+ memset(&vt, 0, sizeof(vt));
+ if (doioctl(fd, VIDIOC_G_TUNER, &vt) != 0) {
+ close(fd);
+ iter = files.erase(iter);
+ continue;
+ }
+ /* remove device if it doesn't support rds block I/O */
+ if (!vt.capability & V4L2_TUNER_CAP_RDS_BLOCK_IO)
+ iter = files.erase(iter);
+ }
+ return files;
+}
+
+static int parse_subopt(char **subs, const char * const *subopts, char **value)
+{
+ int opt = getsubopt(subs, (char * const *)subopts, value);
+
+ if (opt == -1) {
+ fprintf(stderr, "Invalid suboptions specified\n");
+ return -1;
+ }
+ if (value == NULL) {
+ fprintf(stderr, "No value given to suboption <%s>\n",
+ subopts[opt]);
+ return -1;
+ }
+ return opt;
+}
+
+static void parse_freq_seek(char *optarg, struct v4l2_hw_freq_seek &seek)
+{
+ char *value;
+ char *subs = optarg;
+
+ while (*subs != '\0') {
+ static const char *const subopts[] = {
+ "dir",
+ "wrap",
+ "spacing",
+ NULL
+ };
+
+ switch (parse_subopt(&subs, subopts, &value)) {
+ case 0:
+ seek.seek_upward = strtol(value, 0L, 0);
+ break;
+ case 1:
+ seek.wrap_around = strtol(value, 0L, 0);
+ break;
+ case 2:
+ seek.spacing = strtol(value, 0L, 0);
+ break;
+ default:
+ usage_tuner();
+ exit(1);
+ }
+ }
+}
+
+static void print_byte(char byte, bool linebreak)
+{
+ int count = 8;
+ printf(" ");
+ while (count--) {
+ printf("%d", (byte & 128) ? 1 : 0 );
+ byte <<= 1;
+ }
+ if (linebreak)
+ printf("\n");
+}
+
+static void print_rds_group(const struct v4l2_rds_group *rds_group)
+{
+ printf("\nComplete RDS data group received \n");
+ printf("PI: %04x\n", rds_group->pi);
+ printf("Group: %u%c \n", rds_group->group_id, rds_group->group_version);
+ printf("Data B:");
+ print_byte(rds_group->data_b_lsb, true);
+ printf("Data C:");
+ print_byte(rds_group->data_c_msb, false);
+ print_byte(rds_group->data_c_lsb, true);
+ printf("Data D:");
+ print_byte(rds_group->data_d_msb, false);
+ print_byte(rds_group->data_d_lsb, true);
+ printf("\n");
+}
+
+static void print_decoder_info(uint8_t di)
+{
+ printf("\nDI: ");
+ if (di & V4L2_RDS_FLAG_STEREO)
+ printf("Stereo, ");
+ else
+ printf("Mono, ");
+ if (di & V4L2_RDS_FLAG_ARTIFICIAL_HEAD)
+ printf("Artificial Head, ");
+ else
+ printf("No Artificial Head, ");
+ if (di & V4L2_RDS_FLAG_COMPRESSED)
+ printf("Compressed");
+ else
+ printf("Not Compressed");
+}
+
+static void print_rds_statistics(struct v4l2_rds_statistics *statistics)
+{
+ printf("\n\nRDS Statistics: \n");
+ printf("received blocks / received groups: %u / %u\n",
+ statistics->block_cnt, statistics->group_cnt);
+
+ float block_error_percentage =
+ ((float)statistics->block_error_cnt / statistics->block_cnt) * 100.0;
+ printf("block errors / group errors: %u (%3.2f%%) / %u \n",
+ statistics->block_error_cnt,
+ block_error_percentage, statistics->group_error_cnt);
+ float block_corrected_percentage =
+ ((float)statistics->block_corrected_cnt / statistics->block_cnt) *
100.0;
+ printf("corrected blocks: %u (%3.2f%%)\n",
+ statistics->block_corrected_cnt, block_corrected_percentage);
+ for(int i=0; i<16; i++)
+ printf("Group %02d: %u\n", i, statistics->group_type_cnt[i]);
+}
+
+static void print_rds_af(const struct v4l2_rds_af_set *af_set)
+{
+ int counter = 0;
+
+ printf("\nAnnounced AFs: %u", af_set->announced_af);
+ for (int i = 0; i < af_set->size && i < af_set->announced_af; i++,
counter++) {
+ if (af_set->af[i] >= 87500000 ) {
+ printf("\nAF%02d: %.1fMHz", counter, af_set->af[i] /
1000000.0);
+ continue;
+ }
+ printf("\nAF%02d: %.3fkHz", counter, af_set->af[i] / 1000.0);
+ }
+}
+
+static void print_rds_pi(const struct v4l2_rds *handle)
+{
+ printf("\nArea Coverage: %s", v4l2_rds_get_coverage_str(handle));
+}
+
+static void print_rds_data(const struct v4l2_rds *handle, uint32_t
updated_fields)
+{
+ if (params.options[OptPrintBlock])
+ updated_fields = 0xffffffff;
+
+ if ((updated_fields & V4L2_RDS_PI) &&
+ (handle->valid_fields & V4L2_RDS_PI)) {
+ printf("\nPI: %04x", handle->pi);
+ print_rds_pi(handle);
+ }
+
+ if (updated_fields & V4L2_RDS_PS &&
+ handle->valid_fields & V4L2_RDS_PS) {
+ printf("\nPS: ");
+ for (int i = 0; i < 8; ++i) {
+ /* filter out special characters */
+ if (handle->ps[i] >= 0x20 && handle->ps[i] <= 0x7E)
+ printf("%lc",handle->ps[i]);
+ else
+ printf(" ");
+ }
+ }
+
+ if (updated_fields & V4L2_RDS_PTY && handle->valid_fields &
V4L2_RDS_PTY)
+ printf("\nPTY: %0u -> %s",handle->pty,
v4l2_rds_get_pty_str(handle));
+
+ if (updated_fields & V4L2_RDS_PTYN && handle->valid_fields &
V4L2_RDS_PTYN) {
+ printf("\nPTYN: ");
+ for (int i = 0; i < 8; ++i) {
+ /* filter out special characters */
+ if (handle->ptyn[i] >= 0x20 && handle->ptyn[i] <= 0x7E)
+ printf("%lc",handle->ptyn[i]);
+ else
+ printf(" ");
+ }
+ }
+
+ if (updated_fields & V4L2_RDS_TIME) {
+ printf("\nTime: %s", ctime(&handle->time));
+ }
+ if (updated_fields & V4L2_RDS_RT && handle->valid_fields & V4L2_RDS_RT)
{
+ printf("\nRT: ");
+ for (int i = 0; i < handle->rt_length; ++i) {
+ /* filter out special characters */
+ if (handle->rt[i] >= 0x20 && handle->rt[i] <= 0x7E)
+ printf("%lc",handle->rt[i]);
+ else
+ printf(" ");
+ }
+ }
+
+ if (updated_fields & V4L2_RDS_TP && handle->valid_fields & V4L2_RDS_TP)
+ printf("\nTP: %s TA: %s", (handle->tp)? "yes":"no",
+ handle->ta? "yes":"no");
+ if (updated_fields & V4L2_RDS_MS && handle->valid_fields & V4L2_RDS_MS)
+ printf("\nMS Flag: %s", (handle->ms)? "Music" : "Speech");
+ if (updated_fields & V4L2_RDS_ECC && handle->valid_fields &
V4L2_RDS_ECC)
+ printf("\nECC: %X%x, Country: %u -> %s",
+ handle->ecc >> 4, handle->ecc & 0x0f, handle->pi >> 12,
+ v4l2_rds_get_country_str(handle));
+ if (updated_fields & V4L2_RDS_LC && handle->valid_fields & V4L2_RDS_LC)
+ printf("\nLanguage: %u -> %s ", handle->lc,
+ v4l2_rds_get_language_str(handle));
+ if (updated_fields & V4L2_RDS_DI && handle->valid_fields & V4L2_RDS_DI)
+ print_decoder_info(handle->di);
+ if (updated_fields & V4L2_RDS_ODA &&
+ handle->decode_information & V4L2_RDS_ODA) {
+ for (int i = 0; i < handle->rds_oda.size; ++i)
+ printf("\nODA Group: %02u%c, AID:
%08x",handle->rds_oda.oda[i].group_id,
+ handle->rds_oda.oda[i].group_version,
handle->rds_oda.oda[i].aid);
+ }
+ if (updated_fields & V4L2_RDS_AF && handle->valid_fields & V4L2_RDS_AF)
+ print_rds_af(&handle->rds_af);
+ if (params.options[OptPrintBlock])
+ printf("\n");
+}
+
+static void read_rds(struct v4l2_rds *handle, const int fd, const int
wait_limit)
+{
+ int byte_cnt = 0;
+ int error_cnt = 0;
+ uint32_t updated_fields = 0x00;
+ struct v4l2_rds_data rds_data; /* read buffer for rds blocks */
+
+ while (!params.terminate_decoding) {
+ memset(&rds_data, 0, sizeof(rds_data));
+ if ((byte_cnt=read(fd, &rds_data, 3)) != 3) {
+ if (byte_cnt == 0) {
+ printf("\nEnd of input file reached \n");
+ break;
+ } else if(++error_cnt > 2) {
+ fprintf(stderr, "\nError reading from "
+ "device (no RDS data available)\n");
+ break;
+ }
+ /* wait for new data to arrive: transmission of 1
+ * group takes ~88.7ms */
+ usleep(wait_limit * 1000);
+ }
+ else if (byte_cnt == 3) {
+ error_cnt = 0;
+ /* true if a new group was decoded */
+ if ((updated_fields = v4l2_rds_add(handle, &rds_data)))
{
+ print_rds_data(handle, updated_fields);
+ if (params.options[OptVerbose])
+
print_rds_group(v4l2_rds_get_group(handle));
+ }
+ }
+ }
+ /* print a summary of all valid RDS-fields before exiting */
+ printf("\nSummary of valid RDS-fields:");
+ print_rds_data(handle, 0xFFFFFFFF);
+}
+
+static void read_rds_from_fd(const int fd)
+{
+ struct v4l2_rds *rds_handle;
+
+ /* create an rds handle for the current device */
+ if (!(rds_handle = v4l2_rds_create(true))) {
+ fprintf(stderr, "Failed to init RDS lib: %s\n",
strerror(errno));
+ exit(1);
+ }
+
+ /* try to receive and decode RDS data */
+ read_rds(rds_handle, fd, params.wait_limit);
+ print_rds_statistics(&rds_handle->rds_statistics);
+
+ v4l2_rds_destroy(rds_handle);
+}
+
+static int parse_cl(int argc, char **argv)
+{
+ int i = 0;
+ int idx = 0;
+ int opt = 0;
+ /* 26 letters in the alphabet, case sensitive = 26 * 2 possible
+ * short options, where each option requires at most two chars
+ * {option, optional argument} */
+ char short_options[26 * 2 * 2 + 1];
+
+ if (argc == 1) {
+ usage_hint();
+ exit(1);
+ }
+ for (i = 0; long_options[i].name; i++) {
+ if (!isalpha(long_options[i].val))
+ continue;
+ short_options[idx++] = long_options[i].val;
+ if (long_options[i].has_arg == required_argument)
+ short_options[idx++] = ':';
+ }
+ while (1) {
+ int option_index = 0;
+
+ short_options[idx] = 0;
+ opt = getopt_long(argc, argv, short_options,
+ long_options, &option_index);
+ if (opt == -1)
+ break;
+
+ params.options[(int)opt] = 1;
+ switch (opt) {
+ case OptSetDevice:
+ strncpy(params.fd_name, optarg, 80);
+ if (isdigit(optarg[0]) && optarg[1] == 0) {
+ char newdev[20];
+ sprintf(newdev, "/dev/radio%c", optarg[0]);
+ strncpy(params.fd_name, newdev, 20);
+ }
+ break;
+ case OptSetFreq:
+ params.freq = strtod(optarg, NULL);
+ break;
+ case OptListDevices:
+ print_devices(list_devices());
+ break;
+ case OptFreqSeek:
+ parse_freq_seek(optarg, params.freq_seek);
+ break;
+ case OptTunerIndex:
+ params.tuner_index = strtoul(optarg, NULL, 0);
+ break;
+ case OptOpenFile:
+ {
+ if (access(optarg, F_OK) != -1) {
+ params.filemode_active = true;
+ strncpy(params.fd_name, optarg, 80);
+ } else {
+ fprintf(stderr, "Unable to open file: %s\n",
optarg);
+ return -1;
+ }
+ /* enable the read-rds option by default for
convenience */
+ params.options[OptReadRds] = 1;
+ break;
+ }
+ case OptWaitLimit:
+ params.wait_limit = strtoul(optarg, NULL, 0);
+ break;
+ case ':':
+ fprintf(stderr, "Option '%s' requires a value\n",
+ argv[optind]);
+ usage_hint();
+ return 1;
+ case '?':
+ if (argv[optind])
+ fprintf(stderr, "Unknown argument '%s'\n",
argv[optind]);
+ usage_hint();
+ return 1;
+ }
+ }
+ if (optind < argc) {
+ printf("unknown arguments: ");
+ while (optind < argc)
+ printf("%s ", argv[optind++]);
+ printf("\n");
+ usage_hint();
+ return 1;
+ }
+ if (params.options[OptAll]) {
+ params.options[OptGetDriverInfo] = 1;
+ params.options[OptGetFreq] = 1;
+ params.options[OptGetTuner] = 1;
+ params.options[OptSilent] = 1;
+ }
+
+ return 0;
+}
+
+static void print_driver_info(const struct v4l2_capability *vcap)
+{
+
+ printf("Driver Info (%susing libv4l2):\n",
+ params.options[OptUseWrapper] ? "" : "not ");
+ printf("\tDriver name : %s\n", vcap->driver);
+ printf("\tCard type : %s\n", vcap->card);
+ printf("\tBus info : %s\n", vcap->bus_info);
+ printf("\tDriver version: %d.%d.%d\n",
+ vcap->version >> 16,
+ (vcap->version >> 8) & 0xff,
+ vcap->version & 0xff);
+ printf("\tCapabilities : 0x%08X\n", vcap->capabilities);
+ printf("%s", cap2s(vcap->capabilities).c_str());
+ if (vcap->capabilities & V4L2_CAP_DEVICE_CAPS) {
+ printf("\tDevice Caps : 0x%08X\n", vcap->device_caps);
+ printf("%s", cap2s(vcap->device_caps).c_str());
+ }
+}
+
+static void set_options(const int fd, const int capabilities, struct
v4l2_frequency *vf,
+ struct v4l2_tuner *tuner)
+{
+ int mode = -1; /* set audio mode */
+ double fac = 16; /* factor for frequency division */
+
+ if (params.options[OptSetFreq]) {
+ vf->type = V4L2_TUNER_RADIO;
+ tuner->index = params.tuner_index;
+ if (doioctl(fd, VIDIOC_G_TUNER, tuner) == 0) {
+ fac = (tuner->capability & V4L2_TUNER_CAP_LOW) ? 16000
: 16;
+ vf->type = tuner->type;
+ }
+
+ vf->tuner = params.tuner_index;
+ vf->frequency = __u32(params.freq * fac);
+ if (doioctl(fd, VIDIOC_S_FREQUENCY, vf) == 0)
+ printf("Frequency for tuner %d set to %d (%f MHz)\n",
+ vf->tuner, vf->frequency, vf->frequency / fac);
+ }
+
+ if (params.options[OptSetTuner]) {
+ struct v4l2_tuner vt;
+
+ memset(&vt, 0, sizeof(struct v4l2_tuner));
+ vt.index = params.tuner_index;
+ if (doioctl(fd, VIDIOC_G_TUNER, &vt) == 0) {
+ if (mode != -1)
+ vt.audmode = mode;
+ doioctl(fd, VIDIOC_S_TUNER, &vt);
+ }
+ }
+
+ if (params.options[OptFreqSeek]) {
+ params.freq_seek.tuner = params.tuner_index;
+ params.freq_seek.type = V4L2_TUNER_RADIO;
+ doioctl(fd, VIDIOC_S_HW_FREQ_SEEK, ¶ms.freq_seek);
+ }
+}
+
+static void get_options(const int fd, const int capabilities, struct
v4l2_frequency *vf,
+ struct v4l2_tuner *tuner)
+{
+ double fac = 16; /* factor for frequency division */
+
+ if (params.options[OptGetFreq]) {
+ vf->type = V4L2_TUNER_RADIO;
+ tuner->index = params.tuner_index;
+ if (doioctl(fd, VIDIOC_G_TUNER, tuner) == 0) {
+ fac = (tuner->capability & V4L2_TUNER_CAP_LOW) ? 16000
: 16;
+ vf->type = tuner->type;
+ }
+ vf->tuner = params.tuner_index;
+ if (doioctl(fd, VIDIOC_G_FREQUENCY, vf) == 0)
+ printf("Frequency for tuner %d: %d (%f MHz)\n",
+ vf->tuner, vf->frequency, vf->frequency /
fac);
+ }
+
+ if (params.options[OptGetTuner]) {
+ struct v4l2_tuner vt;
+
+ memset(&vt, 0, sizeof(struct v4l2_tuner));
+ vt.index = params.tuner_index;
+ if (doioctl(fd, VIDIOC_G_TUNER, &vt) == 0) {
+ printf("Tuner %d:\n", vt.index);
+ printf("\tName : %s\n", vt.name);
+ printf("\tCapabilities : %s\n",
+ tcap2s(vt.capability).c_str());
+ if (vt.capability & V4L2_TUNER_CAP_LOW)
+ printf("\tFrequency range : %.1f MHz -
%.1f MHz\n",
+ vt.rangelow / 16000.0, vt.rangehigh /
16000.0);
+ else
+ printf("\tFrequency range : %.1f MHz -
%.1f MHz\n",
+ vt.rangelow / 16.0, vt.rangehigh /
16.0);
+ printf("\tSignal strength/AFC : %d%%/%d\n",
+ (int)((vt.signal / 655.35)+0.5), vt.afc);
+ printf("\tCurrent audio mode : %s\n",
audmode2s(vt.audmode));
+ printf("\tAvailable subchannels: %s\n",
+ rxsubchans2s(vt.rxsubchans).c_str());
+ }
+ }
+
+ if (params.options[OptListFreqBands]) {
+ struct v4l2_frequency_band band;
+
+ memset(&band, 0, sizeof(band));
+ band.tuner = params.tuner_index;
+ band.type = V4L2_TUNER_RADIO;
+ band.index = 0;
+ printf("ioctl: VIDIOC_ENUM_FREQ_BANDS\n");
+ while (test_ioctl(fd, VIDIOC_ENUM_FREQ_BANDS, &band) >= 0) {
+ if (band.index)
+ printf("\n");
+ printf("\tIndex : %d\n", band.index);
+ printf("\tModulation : %s\n",
modulation2s(band.modulation).c_str());
+ printf("\tCapability : %s\n",
tcap2s(band.capability).c_str());
+ if (band.capability & V4L2_TUNER_CAP_LOW)
+ printf("\tFrequency Range: %.3f MHz - %.3f
MHz\n",
+ band.rangelow / 16000.0, band.rangehigh /
16000.0);
+ else
+ printf("\tFrequency Range: %.3f MHz - %.3f
MHz\n",
+ band.rangelow / 16.0, band.rangehigh /
16.0);
+ band.index++;
+ }
+ }
+}
+
+int main(int argc, char **argv)
+{
+ int fd = -1;
+
+ /* command args */
+ struct v4l2_tuner tuner; /* set_freq/get_freq */
+ struct v4l2_capability vcap; /* list_cap */
+ struct v4l2_frequency vf; /* get_freq/set_freq */
+
+ memset(&tuner, 0, sizeof(tuner));
+ memset(&vcap, 0, sizeof(vcap));
+ memset(&vf, 0, sizeof(vf));
+ strcpy(params.fd_name, "/dev/radio0");
+
+ /* define locale for unicode support */
+ if (!setlocale(LC_CTYPE, "")) {
+ fprintf(stderr, "Can't set the specified locale!\n");
+ return 1;
+ }
+ /* register signal handler for interrupt signal, to exit gracefully */
+ signal(SIGINT, signal_handler_interrupt);
+
+ /* try to parse the command line */
+ parse_cl(argc, argv);
+ if (params.options[OptHelp]) {
+ usage();
+ exit(0);
+ }
+
+ /* File Mode: disables all other features, except for RDS decoding */
+ if (params.filemode_active) {
+ if ((fd = open(params.fd_name, O_RDONLY|O_NONBLOCK)) < 0){
+ perror("error opening file");
+ exit(1);
+ }
+ read_rds_from_fd(fd);
+ test_close(fd);
+ exit(0);
+ }
+
+ /* Device Mode: open the radio device as read-only and non-blocking */
+ if (!params.options[OptSetDevice]) {
+ /* check the system for RDS capable devices */
+ dev_vec devices = list_devices();
+ if (devices.size() == 0) {
+ fprintf(stderr, "No RDS-capable device found\n");
+ exit(1);
+ }
+ strncpy(params.fd_name, devices[0].c_str(), 80);
+ printf("Using device: %s\n", params.fd_name);
+ }
+ if ((fd = test_open(params.fd_name, O_RDONLY | O_NONBLOCK)) < 0) {
+ fprintf(stderr, "Failed to open %s: %s\n", params.fd_name,
+ strerror(errno));
+ exit(1);
+ }
+ doioctl(fd, VIDIOC_QUERYCAP, &vcap);
+
+ /* Info options */
+ if (params.options[OptGetDriverInfo])
+ print_driver_info(&vcap);
+ /* Set options */
+ set_options(fd, vcap.capabilities, &vf, &tuner);
+ /* Get options */
+ get_options(fd, vcap.capabilities, &vf, &tuner);
+ /* RDS decoding */
+ if (params.options[OptReadRds])
+ read_rds_from_fd(fd);
+
+ test_close(fd);
+ exit(app_result);
+}
--
1.7.10.4
--
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