forked from tTh/FloatImg
more and more semi-useless datas
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4e687db723
commit
e46d490e05
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@ -73,7 +73,7 @@ fprintf(FP, " device caps 0x%X\n", ptr->device_caps);
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return -1;
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}
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/* --------------------------------------------------------------------- */
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static char *str_input_type(int t)
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char *str_input_type(int t)
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{
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switch (t) {
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case V4L2_INPUT_TYPE_TUNER: return "tuner";
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@ -144,6 +144,44 @@ fprintf(FP, " type %d\n", ptr->type); /* enum v4l2_buf_type */
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return 0;
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}
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/* --------------------------------------------------------------------- */
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/* --------------------------------------------------------------------- */
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/* --------------------------------------------------------------------- */
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char *str_ctrl_type(int type)
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{
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switch (type) {
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case V4L2_CTRL_TYPE_INTEGER: return "integer";
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case V4L2_CTRL_TYPE_BOOLEAN: return "boolean";
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case V4L2_CTRL_TYPE_MENU: return "menu";
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case V4L2_CTRL_TYPE_BUTTON: return "button";
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case V4L2_CTRL_TYPE_INTEGER64: return "int64";
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case V4L2_CTRL_TYPE_CTRL_CLASS: return "ctrl-class";
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case V4L2_CTRL_TYPE_STRING: return "string";
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case V4L2_CTRL_TYPE_BITMASK: return "bitmask";
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case V4L2_CTRL_TYPE_INTEGER_MENU: return "int-menu";
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}
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return "???";
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}
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/* --------------------------------------------------------------------- */
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/*
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The 32-bit qctrl.id value is subdivided into three bit ranges:
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the top 4 bits are reserved for flags (e. g. V4L2_CTRL_FLAG_NEXT_CTRL)
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and are not actually part of the ID.
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The remaining 28 bits form the control ID, of which the most significant
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12 bits define the control class and the least significant
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16 bits identify the control within the control class.
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*/
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void pr_ctrl_id(uint32_t id)
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{
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if (verbosity) fprintf(FP, "%08x : ", id);
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fprintf(FP, "%x %03x %04x", (id>>28)&0xf,
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V4L2_CTRL_ID2CLASS(id)>>16, id&0xffff);
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}
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/* --------------------------------------------------------------------- */
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int pr_v4l2_control(char *txt, struct v4l2_control *ptr)
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{
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return -1;
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}
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/* --------------------------------------------------------------------- */
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@ -9,5 +9,9 @@ int pr_v4l2_capability(char *txt, struct v4l2_capability *ptr);
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int pr_v4l2_input(char *txt, struct v4l2_input *ptr);
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int pr_v4l2_format(char *txt, struct v4l2_format *ptr);
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int pr_v4l2_requestbuffers(char *txt, struct v4l2_requestbuffers *ptr);
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char *str_input_type(int t);
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char *str_ctrl_type(int type);
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/* --------------------------------------------------------------------- */
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@ -8,7 +8,7 @@
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#include <math.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <errno.h>
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#include <linux/videodev2.h>
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#include "../floatimg.h"
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@ -19,12 +19,109 @@
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int verbosity;
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/* --------------------------------------------------------------------- */
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static int enum_input(char *txt, int k)
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static int enum_inputs(int fd, char *txt, int k)
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{
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int index, foo;
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struct v4l2_input input;
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printf("-- inputs enumeration '%s'\n", txt);
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index = 0;
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for(;;) {
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memset (&input, 0, sizeof (input));
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input.index = index;
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foo = ioctl(fd, VIDIOC_ENUMINPUT, &input);
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if (foo) {
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if (EINVAL==errno) { break; }
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else {
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perror("enuminput");
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return -1;
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}
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}
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printf("%-32s | %-10s\n", input.name,
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str_input_type(input.type));
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index++;
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}
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return 0;
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}
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/* --------------------------------------------------------------------- */
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int enum_controls(int fd, char *txt, int k)
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{
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struct v4l2_queryctrl qctrl;
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int foo, idx;
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printf("-- controls enumeration '%s'\n", txt);
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memset (&qctrl, 0, sizeof (qctrl));
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/* V4L2_CID_BASE defined in linux/v4l2-controls.h */
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for (idx=V4L2_CID_BASE; idx<V4L2_CID_LASTP1; idx++) {
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qctrl.id = idx;
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if (verbosity) printf(" id %d ", idx);
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if (0 == ioctl (fd, VIDIOC_QUERYCTRL, &qctrl)) {
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if (qctrl.flags & V4L2_CTRL_FLAG_DISABLED) {
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printf("disabled\n");
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continue;
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}
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printf(" %-32s %-10s [%d..%d]\n",
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qctrl.name,
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str_ctrl_type(qctrl.type),
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qctrl.minimum, qctrl.maximum);
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}
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else if (EINVAL==errno) {
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if (verbosity) puts("einval");
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continue;
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}
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else {
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printf("err %d %s\n", errno, strerror(errno));
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}
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fflush(stdout); fflush(stderr);
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}
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return -1;
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}
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/* --------------------------------------------------------------------- */
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/*
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* code based on :
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https://www.linuxtv.org/downloads/legacy/video4linux/API/V4L2_API/spec-single/v4l2.html
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*
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*/
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int enum_extended_controls(int fd, char *txt, int k)
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{
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struct v4l2_queryctrl qctrl;
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int idx;
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printf("-- controls enumeration '%s'\n", txt);
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memset(&qctrl, 0, sizeof(qctrl));
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qctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
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idx = 0;
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while (0 == ioctl (fd, VIDIOC_QUERYCTRL, &qctrl)) {
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pr_ctrl_id(qctrl.id);
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printf(" %-32s %-10s [%d..%d]\n",
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qctrl.name,
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str_ctrl_type(qctrl.type),
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qctrl.minimum, qctrl.maximum);
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qctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
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idx++;
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}
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return -1;
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}
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/* --------------------------------------------------------------------- */
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int show_webcam_infos(char *devname, int k)
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{
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@ -64,6 +161,15 @@ if (-1 == ioctl(vfd, VIDIOC_ENUMINPUT, &input)) {
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}
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pr_v4l2_input("input 0", &input);
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foo = enum_inputs(vfd, "is that working ?", 0);
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fputs("--\n", stderr);
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foo = enum_controls(vfd, "is that working ?", 0);
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fputs("--\n", stderr);
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foo = enum_extended_controls(vfd, "looking for extended", 0);
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close(vfd);
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