diff options
Diffstat (limited to 'src/v4l.c')
| -rw-r--r-- | src/v4l.c | 30 |
1 files changed, 27 insertions, 3 deletions
@@ -36,7 +36,8 @@ void print_cam(cam_t *cam) printf("timestamp = %s\n\n", cam->ts_string); } -static void insert_resolution(cam_t *cam, unsigned int x, unsigned int y) +static void insert_resolution(cam_t *cam, unsigned int x, unsigned int y, + float max_fps) { unsigned int i; @@ -50,6 +51,7 @@ static void insert_resolution(cam_t *cam, unsigned int x, unsigned int y) cam->res[cam->n_res].x = x; cam->res[cam->n_res].y = y; + cam->res[cam->n_res].max_fps = max_fps; cam->n_res++; } @@ -66,6 +68,27 @@ static int sort_func(const void *__b, const void *__a) return r; } +static float get_max_fps_discrete(cam_t *cam, + struct v4l2_frmsizeenum *frmsize) +{ + struct v4l2_frmivalenum frmival; + float fps, max_fps = -1; + + frmival.width = frmsize->discrete.width; + frmival.height = frmsize->discrete.height; + frmival.pixel_format = frmsize->pixel_format; + frmival.index = 0; + + for (frmival.index = 0; + !v4l2_ioctl(cam->dev, VIDIOC_ENUM_FRAMEINTERVALS, &frmival); + frmival.index++) { + fps = ((float)frmival.discrete.denominator)/frmival.discrete.numerator; + if (fps > max_fps) + max_fps = fps; + } + return max_fps; +} + void get_supported_resolutions(cam_t *cam) { struct v4l2_fmtdesc fmt; @@ -87,7 +110,8 @@ void get_supported_resolutions(cam_t *cam) while (!v4l2_ioctl(cam->dev, VIDIOC_ENUM_FRAMESIZES, &frmsize)) { if (frmsize.type == V4L2_FRMSIZE_TYPE_DISCRETE) { insert_resolution(cam, frmsize.discrete.width, - frmsize.discrete.height); + frmsize.discrete.height, + get_max_fps_discrete(cam, &frmsize)); } else if (frmsize.type == V4L2_FRMSIZE_TYPE_STEPWISE) { for (i = 0; i < 4; i++) { x = frmsize.stepwise.min_width + @@ -96,7 +120,7 @@ void get_supported_resolutions(cam_t *cam) y = frmsize.stepwise.min_height + i * (frmsize.stepwise.max_height - frmsize.stepwise.min_height) / 4; - insert_resolution(cam, x, y); + insert_resolution(cam, x, y, -1); } } frmsize.index++; |