diff options
| -rw-r--r-- | yavta.c | 230 |
1 files changed, 173 insertions, 57 deletions
@@ -19,6 +19,7 @@ #define __STDC_FORMAT_MACROS +#include <ctype.h> #include <stdio.h> #include <string.h> #include <fcntl.h> @@ -569,59 +570,38 @@ static int get_control(struct device *dev, return 0; } -static void set_control(struct device *dev, unsigned int id, - int64_t val) +static int set_control(struct device *dev, + const struct v4l2_query_ext_ctrl *query, + struct v4l2_ext_control *ctrl) { struct v4l2_ext_controls ctrls; - struct v4l2_ext_control ctrl; - struct v4l2_query_ext_ctrl query; - int64_t old_val = val; - int is_64; + struct v4l2_control old; int ret; - ret = query_control(dev, id, &query); - if (ret < 0) - return; - - is_64 = query.type == V4L2_CTRL_TYPE_INTEGER64; - memset(&ctrls, 0, sizeof(ctrls)); - memset(&ctrl, 0, sizeof(ctrl)); - ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(id); + ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(ctrl->id); ctrls.count = 1; - ctrls.controls = &ctrl; + ctrls.controls = ctrl; - ctrl.id = id; - if (is_64) - ctrl.value64 = val; - else - ctrl.value = val; + ctrl->id = query->id; ret = ioctl(dev->fd, VIDIOC_S_EXT_CTRLS, &ctrls); - if (ret != -1) { - if (is_64) - val = ctrl.value64; - else - val = ctrl.value; - } else if (!is_64 && query.type != V4L2_CTRL_TYPE_STRING && - (errno == EINVAL || errno == ENOTTY)) { - struct v4l2_control old; - - old.id = id; - old.value = val; - ret = ioctl(dev->fd, VIDIOC_S_CTRL, &old); - if (ret != -1) - val = old.value; - } - if (ret == -1) { - printf("unable to set control 0x%8.8x: %s (%d).\n", - id, strerror(errno), errno); - return; - } + if (ret != -1) + return 0; - printf("Control 0x%08x set to %" PRId64 ", is %" PRId64 "\n", - id, old_val, val); + if (query->flags & V4L2_CTRL_FLAG_HAS_PAYLOAD || + query->type == V4L2_CTRL_TYPE_INTEGER64 || + (errno != EINVAL && errno != ENOTTY)) + return -1; + + old.id = ctrl->id; + old.value = ctrl->value; + ret = ioctl(dev->fd, VIDIOC_S_CTRL, &old); + if (ret != -1) + ctrl->value = old.value; + + return ret; } static int video_get_format(struct device *dev) @@ -1278,9 +1258,9 @@ static void video_print_control_value(const struct v4l2_query_ext_ctrl *query, } } -static int video_print_control(struct device *dev, - const struct v4l2_query_ext_ctrl *query, - bool full) +static int video_get_control(struct device *dev, + const struct v4l2_query_ext_ctrl *query, + bool full) { struct v4l2_ext_control ctrl; unsigned int i; @@ -1338,17 +1318,157 @@ static int video_print_control(struct device *dev, return 1; } -static int __video_print_control(struct device *dev, - const struct v4l2_query_ext_ctrl *query) +static int __video_get_control(struct device *dev, + const struct v4l2_query_ext_ctrl *query) +{ + return video_get_control(dev, query, true); +} + +static int video_parse_control_array(const struct v4l2_query_ext_ctrl *query, + struct v4l2_ext_control *ctrl, + const char *val) +{ + unsigned int i; + char *endptr; + __u32 value; + + for ( ; isspace(*val); ++val) { }; + if (*val++ != '{') + return -EINVAL; + + for (i = 0; i < query->elems; ++i) { + for ( ; isspace(*val); ++val) { }; + + switch (query->type) { + case V4L2_CTRL_TYPE_U8: + case V4L2_CTRL_TYPE_U16: + case V4L2_CTRL_TYPE_U32: + default: + value = strtoul(val, &endptr, 0); + break; + } + + if (endptr == NULL) + return -EINVAL; + + switch (query->type) { + case V4L2_CTRL_TYPE_U8: + ctrl->p_u8[i] = value; + break; + case V4L2_CTRL_TYPE_U16: + ctrl->p_u16[i] = value; + break; + case V4L2_CTRL_TYPE_U32: + ctrl->p_u32[i] = value; + break; + } + + val = endptr; + for ( ; isspace(*val); ++val) { }; + if (*val++ != ',') + break; + } + + if (i < query->elems - 1) + return -EINVAL; + + for ( ; isspace(*val); ++val) { }; + if (*val++ != '}') + return -EINVAL; + + for ( ; isspace(*val); ++val) { }; + if (*val++ != '\0') + return -EINVAL; + + return 0; +} + +static void video_set_control(struct device *dev, unsigned int id, + const char *val) { - return video_print_control(dev, query, true); + struct v4l2_query_ext_ctrl query; + struct v4l2_ext_control ctrl; + char *endptr; + int ret; + + ret = query_control(dev, id, &query); + if (ret < 0) + return; + + memset(&ctrl, 0, sizeof(ctrl)); + + if (query.nr_of_dims == 0) { + switch (query.type) { + case V4L2_CTRL_TYPE_INTEGER: + case V4L2_CTRL_TYPE_BOOLEAN: + case V4L2_CTRL_TYPE_MENU: + case V4L2_CTRL_TYPE_INTEGER_MENU: + case V4L2_CTRL_TYPE_BITMASK: + ctrl.value = strtol(val, &endptr, 0); + if (*endptr != 0) { + printf("Invalid control value '%s'\n", val); + return; + } + break; + case V4L2_CTRL_TYPE_INTEGER64: + ctrl.value64 = strtoll(val, &endptr, 0); + if (*endptr != 0) { + printf("Invalid control value '%s'\n", val); + return; + } + break; + case V4L2_CTRL_TYPE_STRING: + ctrl.size = query.elem_size; + ctrl.ptr = malloc(ctrl.size); + if (ctrl.ptr == NULL) + return; + strncpy(ctrl.string, val, ctrl.size); + break; + default: + printf("Unsupported control type\n"); + return; + } + } else { + switch (query.type) { + case V4L2_CTRL_TYPE_U8: + case V4L2_CTRL_TYPE_U16: + case V4L2_CTRL_TYPE_U32: + ctrl.size = query.elem_size * query.elems; + ctrl.ptr = malloc(ctrl.size); + if (ctrl.ptr == NULL) + return; + ret = video_parse_control_array(&query, &ctrl, val); + if (ret < 0) { + printf("Invalid compound control value '%s'\n", val); + return; + } + break; + default: + printf("Unsupported control type %u\n", query.type); + break; + } + } + + ret = set_control(dev, &query, &ctrl); + if (ret < 0) { + printf("unable to set control 0x%8.8x: %s (%d).\n", + id, strerror(errno), errno); + } else { + printf("Control 0x%08x set to %s, is ", id, val); + + video_print_control_value(&query, &ctrl); + printf("\n"); + } + + if ((query.flags & V4L2_CTRL_FLAG_HAS_PAYLOAD) && ctrl.ptr) + free(ctrl.ptr); } static void video_list_controls(struct device *dev) { int ret; - ret = video_for_each_control(dev, __video_print_control); + ret = video_for_each_control(dev, __video_get_control); if (ret < 0) return; @@ -2064,7 +2184,7 @@ int main(int argc, char *argv[]) /* Controls */ int ctrl_name = 0; - int ctrl_value = 0; + const char *ctrl_value = NULL; /* Video buffers */ enum v4l2_memory memtype = V4L2_MEMORY_MMAP; @@ -2204,11 +2324,7 @@ int main(int argc, char *argv[]) printf("Invalid control name '%s'\n", optarg); return 1; } - ctrl_value = strtol(endptr + 1, &endptr, 0); - if (*endptr != 0) { - printf("Invalid control value '%s'\n", optarg); - return 1; - } + ctrl_value = endptr + 1; do_set_control = 1; break; case OPT_BUFFER_SIZE: @@ -2324,11 +2440,11 @@ int main(int argc, char *argv[]) ret = query_control(&dev, ctrl_name, &query); if (ret == 0) - video_print_control(&dev, &query, false); + video_get_control(&dev, &query, false); } if (do_set_control) - set_control(&dev, ctrl_name, ctrl_value); + video_set_control(&dev, ctrl_name, ctrl_value); if (do_list_controls) video_list_controls(&dev); |