/*
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* Media controller test application
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*
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* Copyright (C) 2010-2014 Ideas on board SPRL
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*
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* Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <ctype.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#ifndef __ANDROID__
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#include <v4l2subdev.h>
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#endif
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#include <linux/media.h>
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#include <linux/videodev2.h>
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#include "options.h"
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#include "v4l2subdev.h"
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#define MEDIA_DEVNAME_DEFAULT "/dev/media0"
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struct media_options media_opts = {
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.devname = MEDIA_DEVNAME_DEFAULT,
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};
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static void usage(const char* argv0)
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{
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unsigned int i;
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printf("%s [options]\n", argv0);
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printf("-d, --device dev Media device name (default: %s)\n", MEDIA_DEVNAME_DEFAULT);
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printf("-e, --entity name Print the device name associated with the "
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"given "
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"entity\n");
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printf("-V, --set-v4l2 v4l2 Comma-separated list of formats to setup\n");
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printf(" --get-v4l2 pad Print the active format on a given pad\n");
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printf(" --get-dv pad Print detected and current DV timings on a "
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"given pad\n");
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printf(" --set-dv pad Configure DV timings on a given pad\n");
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printf("-h, --help Show verbose help and exit\n");
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printf("-i, --interactive Modify links interactively\n");
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printf("-l, --links links Comma-separated list of link descriptors to "
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"setup\n");
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printf(" --known-mbus-fmts List known media bus formats and their "
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"numeric values\n");
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printf("-p, --print-topology Print the device topology. If an entity\n");
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printf(" is specified through the -e option, print\n");
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printf(" information for that entity only.\n");
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printf(" --print-dot Print the device topology as a dot "
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"graph\n");
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printf("-r, --reset Reset all links to inactive\n");
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printf("-v, --verbose Be verbose\n");
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printf("\n");
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printf("Links and formats are defined as\n");
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printf("\tlinks = link { ',' link } ;\n");
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printf("\tlink = pad '->' pad '[' flags ']' ;\n");
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printf("\tpad = entity ':' pad-number ;\n");
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printf("\tentity = entity-number | ( '\"' entity-name '\"' ) ;\n");
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printf("\n");
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printf("\tv4l2 = pad '[' v4l2-properties ']' ;\n");
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printf("\tv4l2-properties = v4l2-property { ',' v4l2-property } ;\n");
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printf("\tv4l2-property = v4l2-mbusfmt | v4l2-crop | v4l2-interval\n");
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printf("\t | v4l2-compose | v4l2-interval ;\n");
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printf("\tv4l2-mbusfmt = 'fmt:' fcc '/' size ; { 'field:' v4l2-field ; } "
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"{ 'colorspace:' v4l2-colorspace ; }\n");
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printf("\t { 'xfer:' v4l2-xfer-func ; } { 'ycbcr-enc:' "
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"v4l2-ycbcr-enc-func ; }\n");
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printf("\t { 'quantization:' v4l2-quant ; }\n");
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printf("\tv4l2-crop = 'crop:' rectangle ;\n");
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printf("\tv4l2-compose = 'compose:' rectangle ;\n");
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printf("\tv4l2-interval = '@' numerator '/' denominator ;\n");
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printf("\n");
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printf("\trectangle = '(' left ',' top, ')' '/' size ;\n");
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printf("\tsize = width 'x' height ;\n");
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printf("\n");
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printf("where the fields are\n");
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printf("\tentity-number Entity numeric identifier\n");
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printf("\tentity-name Entity name (string) \n");
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printf("\tpad-number Pad numeric identifier\n");
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printf("\tflags Link flags (0: inactive, 1: active)\n");
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printf("\tfcc Format FourCC\n");
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printf("\twidth Image width in pixels\n");
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printf("\theight Image height in pixels\n");
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printf("\tnumerator Frame interval numerator\n");
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printf("\tdenominator Frame interval denominator\n");
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printf("\tv4l2-field One of the following:\n");
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for (i = V4L2_FIELD_ANY; i <= V4L2_FIELD_INTERLACED_BT; i++) {
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printf("\t %s\n", v4l2_subdev_field_to_string(i));
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}
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printf("\tv4l2-colorspace One of the following:\n");
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for (i = V4L2_COLORSPACE_DEFAULT; i <= V4L2_COLORSPACE_DCI_P3; i++) {
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printf("\t %s\n", v4l2_subdev_colorspace_to_string(i));
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}
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printf("\tv4l2-xfer-func One of the following:\n");
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for (i = V4L2_XFER_FUNC_DEFAULT; i <= V4L2_XFER_FUNC_SMPTE2084; i++) {
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printf("\t %s\n", v4l2_subdev_xfer_func_to_string(i));
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}
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printf("\tv4l2-quant One of the following:\n");
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for (i = V4L2_QUANTIZATION_DEFAULT; i <= V4L2_QUANTIZATION_LIM_RANGE; i++) {
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printf("\t %s\n", v4l2_subdev_quantization_to_string(i));
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}
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}
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#define OPT_PRINT_DOT 256
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#define OPT_GET_FORMAT 257
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#define OPT_SET_DV 258
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#define OPT_LIST_KNOWN_MBUS_FMTS 259
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#define OPT_GET_DV 260
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static struct option opts[] = {
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{"device", 1, 0, 'd'},
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{"entity", 1, 0, 'e'},
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{"set-format", 1, 0, 'f'},
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{"set-v4l2", 1, 0, 'V'},
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{"get-format", 1, 0, OPT_GET_FORMAT},
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{"get-v4l2", 1, 0, OPT_GET_FORMAT},
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{"get-dv", 1, 0, OPT_GET_DV},
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{"set-dv", 1, 0, OPT_SET_DV},
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{"help", 0, 0, 'h'},
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{"interactive", 0, 0, 'i'},
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{"links", 1, 0, 'l'},
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{"known-mbus-fmts", 0, 0, OPT_LIST_KNOWN_MBUS_FMTS},
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{"print-dot", 0, 0, OPT_PRINT_DOT},
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{"print-topology", 0, 0, 'p'},
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{"reset", 0, 0, 'r'},
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{"verbose", 0, 0, 'v'},
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{},
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};
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static void list_known_mbus_formats(void)
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{
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unsigned int ncodes;
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const unsigned int* code = v4l2_subdev_pixelcode_list(&ncodes);
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while (ncodes--) {
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const char* str = v4l2_subdev_pixelcode_to_string(*code);
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int spaces = 30 - (int)strlen(str);
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if (*code == 0) {
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break;
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}
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if (spaces < 0) {
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spaces = 0;
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}
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printf("%s %*c 0x%4.4x\n", str, spaces, ' ', *code);
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code++;
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}
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}
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static const char* make_devname(const char* device)
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{
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static char newdev[300];
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struct dirent* ep;
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DIR* dp;
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if (!access(device, F_OK)) {
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return device;
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}
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if (device[0] >= '0' && device[0] <= '9' && strlen(device) <= 3) {
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snprintf(newdev, sizeof(newdev), "/dev/media%s", device);
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return newdev;
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}
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dp = opendir("/dev");
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if (dp == NULL) {
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return device;
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}
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while ((ep = readdir(dp))) {
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const char* name = ep->d_name;
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if (!memcmp(name, "media", 5) && isdigit(name[5])) {
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struct media_device_info mdi;
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int ret;
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int fd;
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snprintf(newdev, sizeof(newdev), "/dev/%s", name);
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fd = open(newdev, O_RDWR);
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if (fd < 0) {
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continue;
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}
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ret = ioctl(fd, MEDIA_IOC_DEVICE_INFO, &mdi);
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close(fd);
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if (!ret && !strcmp(device, mdi.bus_info)) {
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closedir(dp);
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return newdev;
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}
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}
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}
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closedir(dp);
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return device;
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}
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int parse_cmdline(int argc, char** argv)
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{
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int opt;
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if (argc == 1) {
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usage(argv[0]);
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return 1;
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}
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/* parse options */
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while ((opt = getopt_long(argc, argv, "d:e:f:hil:prvV:", opts, NULL)) != -1) {
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switch (opt) {
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case 'd':
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media_opts.devname = make_devname(optarg);
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break;
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case 'e':
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media_opts.entity = optarg;
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break;
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/* 'f' is supported for backward compatibility reasons and will
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* be removed later.
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*/
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case 'f':
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fprintf(stderr, "Warning: the -f option is deprecated "
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"and has been replaced by -V.\n");
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/* fall through */
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case 'V':
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media_opts.formats = optarg;
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break;
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case 'h':
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usage(argv[0]);
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exit(0);
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case 'i':
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media_opts.interactive = 1;
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break;
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case 'l':
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media_opts.links = optarg;
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break;
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case 'p':
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media_opts.print = 1;
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break;
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case 'r':
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media_opts.reset = 1;
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break;
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case 'v':
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media_opts.verbose = 1;
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break;
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case OPT_PRINT_DOT:
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media_opts.print_dot = 1;
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break;
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case OPT_GET_FORMAT:
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media_opts.fmt_pad = optarg;
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break;
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case OPT_GET_DV:
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media_opts.get_dv_pad = optarg;
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break;
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case OPT_SET_DV:
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media_opts.dv_pad = optarg;
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break;
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case OPT_LIST_KNOWN_MBUS_FMTS:
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list_known_mbus_formats();
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exit(0);
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default:
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printf("Invalid option -%c\n", opt);
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printf("Run %s -h for help.\n", argv[0]);
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return 1;
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}
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}
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return 0;
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}
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