diff options
Diffstat (limited to 'yavta.c')
| -rw-r--r-- | yavta.c | 57 |
1 files changed, 48 insertions, 9 deletions
@@ -63,6 +63,7 @@ struct buffer struct device { int fd; + int opened; enum v4l2_buf_type type; enum v4l2_memory memtype; @@ -258,8 +259,30 @@ static void video_init(struct device *dev) dev->type = (enum v4l2_buf_type)-1; } +static bool video_has_fd(struct device *dev) +{ + return dev->fd != -1; +} + +static int video_set_fd(struct device *dev, int fd) +{ + if (video_has_fd(dev)) { + printf("Can't set fd (already open).\n"); + return -1; + } + + dev->fd = fd; + + return 0; +} + static int video_open(struct device *dev, const char *devname) { + if (video_has_fd(dev)) { + printf("Can't open device (already open).\n"); + return -1; + } + dev->fd = open(devname, O_RDWR); if (dev->fd < 0) { printf("Error opening device %s: %s (%d).\n", devname, @@ -269,6 +292,8 @@ static int video_open(struct device *dev, const char *devname) printf("Device %s opened.\n", devname); + dev->opened = 1; + return 0; } @@ -318,7 +343,8 @@ static void video_close(struct device *dev) free(dev->pattern[i]); free(dev->buffers); - close(dev->fd); + if (dev->opened) + close(dev->fd); } static unsigned int get_control_type(struct device *dev, unsigned int id) @@ -1544,6 +1570,7 @@ static void usage(const char *argv0) printf("-w, --set-control 'ctrl value' Set control 'ctrl' to 'value'\n"); printf(" --enum-formats Enumerate formats\n"); printf(" --enum-inputs Enumerate inputs\n"); + printf(" --fd Use a numeric file descriptor insted of a device\n"); printf(" --no-query Don't query capabilities on open\n"); printf(" --offset User pointer buffer offset from page start\n"); printf(" --requeue-last Requeue the last buffers before streamoff\n"); @@ -1560,6 +1587,7 @@ static void usage(const char *argv0) #define OPT_USERPTR_OFFSET 261 #define OPT_REQUEUE_LAST 262 #define OPT_STRIDE 263 +#define OPT_FD 264 static struct option opts[] = { {"buffer-type", 1, 0, 'B'}, @@ -1568,6 +1596,7 @@ static struct option opts[] = { {"delay", 1, 0, 'd'}, {"enum-formats", 0, 0, OPT_ENUM_FORMATS}, {"enum-inputs", 0, 0, OPT_ENUM_INPUTS}, + {"fd", 1, 0, OPT_FD}, {"file", 2, 0, 'F'}, {"fill-frames", 0, 0, 'I'}, {"format", 1, 0, 'f'}, @@ -1761,6 +1790,15 @@ int main(int argc, char *argv[]) case OPT_ENUM_INPUTS: do_enum_inputs = 1; break; + case OPT_FD: + ret = atoi(optarg); + if (ret < 0) { + printf("Bad file descriptor %d\n", ret); + return 1; + } + printf("Using file descriptor %d\n", ret); + video_set_fd(&dev, ret); + break; case OPT_NO_QUERY: no_query = 1; break; @@ -1791,17 +1829,18 @@ int main(int argc, char *argv[]) return 1; } - if (optind >= argc) { - usage(argv[0]); - return 1; - } - if (!do_file) filename = NULL; - ret = video_open(&dev, argv[optind]); - if (ret < 0) - return 1; + if (!video_has_fd(&dev)) { + if (optind >= argc) { + usage(argv[0]); + return 1; + } + ret = video_open(&dev, argv[optind]); + if (ret < 0) + return 1; + } if (!no_query) { ret = video_querycap(&dev, &capabilities); |