forked from tTh/FloatImg
more precision, please
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4a0941f76b
commit
a47730d09d
19
v4l2/t.c
19
v4l2/t.c
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@ -29,32 +29,21 @@ struct v4l2_requestbuffers reqbuf;
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fprintf(stderr, ">>> %s ( '%s' %d )\n", __func__, dev, k);
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fprintf(stderr, ">>> %s ( '%s' %d )\n", __func__, dev, k);
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vfd = open_device(dev);
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vfd = open_device(dev);
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fprintf(stderr, "\topen %s -> %d\n", dev, vfd);
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if (verbosity) fprintf(stderr, "\topen %s -> %d\n", dev, vfd);
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memset(&fmt, 0, sizeof(fmt));
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memset(&fmt, 0, sizeof(fmt));
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pr_v4l2_format("after 0", &fmt);
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fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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fmt.fmt.pix.width = 640;
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// pr_v4l2_format("before ioctl", &fmt);
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fmt.fmt.pix.height = 480;
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fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_RGB24;
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fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
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pr_v4l2_format("before ioctl", &fmt);
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foo = ioctl(vfd, VIDIOC_G_FMT, &fmt);
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foo = ioctl(vfd, VIDIOC_S_FMT, &fmt);
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fprintf(stderr, "ioctl -> %d\n", foo);
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fprintf(stderr, "ioctl -> %d\n", foo);
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if (foo < 0) {
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if (0 != foo) {
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perror("ioctl S_FMT");
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perror("ioctl S_FMT");
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exit(1);
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exit(1);
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}
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}
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pr_v4l2_format("after ioctl", &fmt);
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pr_v4l2_format("after ioctl", &fmt);
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/* todo V4L2_BUF_TYPE_VIDEO_CAPTURE */
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memset(&reqbuf, 0, sizeof(reqbuf));
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pr_v4l2_requestbuffers("after 0", &reqbuf);
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return k;
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return k;
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}
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}
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@ -18,13 +18,13 @@ static char *fmttype2str(int type)
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switch(type) {
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switch(type) {
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case 0: return "[zero]";
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case 0: return "[zero]";
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case 1: return "video capture";
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case V4L2_BUF_TYPE_VIDEO_CAPTURE: return "video capture";
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case 2: return "video output";
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case V4L2_BUF_TYPE_VIDEO_OUTPUT: return "video output";
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case 13: return "META capture";
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case 13: return "META capture";
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}
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}
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return "???";
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return "XXX";
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}
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}
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/* --------------------------------------------------------------------- */
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/* --------------------------------------------------------------------- */
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static void pr_capabilities(uint32_t caps)
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static void pr_capabilities(uint32_t caps)
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@ -203,13 +203,20 @@ fprintf(FP, " type %d %s\n", ptr->type,/* enum v4l2_buf_type */
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switch(ptr->type) {
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switch(ptr->type) {
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case 1: // fputs(" Capture\n", FP);
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case V4L2_BUF_TYPE_VIDEO_CAPTURE:
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fprintf(FP, " dims %dx%d\n",
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fprintf(FP, " dims %dx%d\n",
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ptr->fmt.pix.width,
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ptr->fmt.pix.width,
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ptr->fmt.pix.height);
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ptr->fmt.pix.height);
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fprintf(FP, " pixformat %s\n",
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str_fourcc(ptr->fmt.pix.pixelformat));
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fprintf(FP, " field %d\n",
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ptr->fmt.pix.field); /* enum v4l2_field */
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fprintf(FP, " padding %d\n",
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ptr->fmt.pix.bytesperline);
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break;
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break;
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default: fprintf(FP, "type is %d\n", ptr->type);
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default: fprintf(FP, "XXX type %d unknow\n", ptr->type);
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break;
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break;
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}
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}
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@ -162,6 +162,7 @@ return -1;
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int show_webcam_infos(char *devname, char *title, int k)
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int show_webcam_infos(char *devname, char *title, int k)
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{
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{
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int vfd, foo;
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int vfd, foo;
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char ligne[100];
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struct v4l2_capability cap;
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struct v4l2_capability cap;
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// struct v4l2_format fmt;
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// struct v4l2_format fmt;
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@ -191,11 +192,13 @@ if (foo < 0) {
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pr_v4l2_capability(devname, &cap);
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pr_v4l2_capability(devname, &cap);
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memset(&input, 0, sizeof(input));
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memset(&input, 0, sizeof(input));
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input.index = 1;
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if (-1 == ioctl(vfd, VIDIOC_ENUMINPUT, &input)) {
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if (-1 == ioctl(vfd, VIDIOC_ENUMINPUT, &input)) {
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perror("VIDIOC_ENUMINPUT");
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perror("VIDIOC_ENUMINPUT");
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exit(EXIT_FAILURE);
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exit(EXIT_FAILURE);
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}
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}
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pr_v4l2_input("input 0", &input);
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sprintf(ligne, "input %d", input.index);
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pr_v4l2_input(ligne, &input);
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foo = enum_inputs(vfd, "on peut voir quoi ?", 0);
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foo = enum_inputs(vfd, "on peut voir quoi ?", 0);
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