tTh/FloatImg
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more precision, please

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tth 2019-07-29 02:53:28 +02:00
parent 4a0941f76b
commit a47730d09d
3 changed files with 26 additions and 27 deletions
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19
v4l2/t.c
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@ -29,32 +29,21 @@ struct v4l2_requestbuffers reqbuf;
fprintf(stderr, ">>> %s ( '%s' %d )\n", __func__, dev, k);
vfd = open_device(dev);
fprintf(stderr, "\topen %s -> %d\n", dev, vfd);
if (verbosity) fprintf(stderr, "\topen %s -> %d\n", dev, vfd);
memset(&fmt, 0, sizeof(fmt));
pr_v4l2_format("after 0", &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;
// pr_v4l2_format("before ioctl", &fmt);
pr_v4l2_format("before ioctl", &fmt);
foo = ioctl(vfd, VIDIOC_S_FMT, &fmt);
foo = ioctl(vfd, VIDIOC_G_FMT, &fmt);
fprintf(stderr, "ioctl -> %d\n", foo);
if (foo < 0) {
if (0 != foo) {
perror("ioctl S_FMT");
exit(1);
}
pr_v4l2_format("after ioctl", &fmt);
/* todo V4L2_BUF_TYPE_VIDEO_CAPTURE */
memset(&reqbuf, 0, sizeof(reqbuf));
pr_v4l2_requestbuffers("after 0", &reqbuf);
return k;
}

27
v4l2/v4l2_pr_structs.c
View File

@ -18,13 +18,13 @@ static char *fmttype2str(int type)
switch(type) {
case 0: return "[zero]";
case 1: return "video capture";
case 2: return "video output";
case V4L2_BUF_TYPE_VIDEO_CAPTURE: return "video capture";
case V4L2_BUF_TYPE_VIDEO_OUTPUT: return "video output";
case 13: return "META capture";
}
return "???";
return "XXX";
}
/* --------------------------------------------------------------------- */
static void pr_capabilities(uint32_t caps)
@ -198,18 +198,25 @@ return -1;
int pr_v4l2_format(char *txt, struct v4l2_format *ptr)
{
fprintf(FP, "-- v4l2_format, %-15s %p\n", txt, ptr);
fprintf(FP, " type %d %s\n", ptr->type,/* enum v4l2_buf_type */
fprintf(FP, " type %d %s\n", ptr->type,/* enum v4l2_buf_type */
fmttype2str(ptr->type));
switch(ptr->type) {
case 1: // fputs(" Capture\n", FP);
fprintf(FP, " dims %dx%d\n",
ptr->fmt.pix.width,
ptr->fmt.pix.height);
break;
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
fprintf(FP, " dims %dx%d\n",
ptr->fmt.pix.width,
ptr->fmt.pix.height);
fprintf(FP, " pixformat %s\n",
str_fourcc(ptr->fmt.pix.pixelformat));
fprintf(FP, " field %d\n",
ptr->fmt.pix.field); /* enum v4l2_field */
fprintf(FP, " padding %d\n",
ptr->fmt.pix.bytesperline);
default: fprintf(FP, "type is %d\n", ptr->type);
break;
default: fprintf(FP, "XXX type %d unknow\n", ptr->type);
break;
}

7
v4l2/video-infos.c
View File

@ -161,7 +161,8 @@ return -1;
/* --------------------------------------------------------------------- */
int show_webcam_infos(char *devname, char *title, int k)
{
int vfd, foo;
int vfd, foo;
char ligne[100];
struct v4l2_capability cap;
// struct v4l2_format fmt;
@ -191,11 +192,13 @@ if (foo < 0) {
pr_v4l2_capability(devname, &cap);
memset(&input, 0, sizeof(input));
input.index = 1;
if (-1 == ioctl(vfd, VIDIOC_ENUMINPUT, &input)) {
perror("VIDIOC_ENUMINPUT");
exit(EXIT_FAILURE);
}
pr_v4l2_input("input 0", &input);
sprintf(ligne, "input %d", input.index);
pr_v4l2_input(ligne, &input);
foo = enum_inputs(vfd, "on peut voir quoi ?", 0);