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v4l2: report framerate using VIDIOC_G_PARM

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Dmitry Sharshakov 2023-01-08 10:07:27 +03:00 committed by Wim Taymans
parent 6d58c73937
commit 549e543444
1 changed files with 76 additions and 0 deletions
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76
pipewire-v4l2/src/pipewire-v4l2.c
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@ -1746,6 +1746,76 @@ static int vidioc_try_fmt(struct file *file, struct v4l2_format *arg)
return res;
}
static int vidioc_g_parm(struct file *file, struct v4l2_streamparm *arg)
{
if (arg->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
struct param *p;
pw_thread_loop_lock(file->loop);
bool found = false;
struct spa_video_info info;
int num = 0, denom = 0;
spa_list_for_each(p, &file->node->param_list, link) {
if (p->id != SPA_PARAM_EnumFormat || p->param == NULL)
continue;
if (param_to_info(p->param, &info) < 0)
continue;
switch (info.media_subtype) {
case SPA_MEDIA_SUBTYPE_raw:
num = info.info.raw.framerate.num;
denom = info.info.raw.framerate.denom;
break;
case SPA_MEDIA_SUBTYPE_mjpg:
num = info.info.mjpg.framerate.num;
denom = info.info.mjpg.framerate.denom;
break;
case SPA_MEDIA_SUBTYPE_h264:
num = info.info.h264.framerate.num;
denom = info.info.h264.framerate.denom;
break;
}
if (num == 0 || denom == 0)
continue;
found = true;
break;
}
if (!found) {
pw_thread_loop_unlock(file->loop);
return -EINVAL;
}
pw_thread_loop_unlock(file->loop);
spa_zero(*arg);
arg->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
arg->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
arg->parm.capture.capturemode = 0;
arg->parm.capture.extendedmode = 0;
arg->parm.capture.readbuffers = 0;
arg->parm.capture.timeperframe.numerator = denom;
arg->parm.capture.timeperframe.denominator = num;
pw_log_info("VIDIOC_G_PARM frametime: %d/%d", num, denom);
return 0;
}
// TODO: implement setting parameters
static int vidioc_s_parm(struct file *file, struct v4l2_streamparm *arg)
{
pw_log_warn("VIDIOC_S_PARM is unimplemented, returning current value");
vidioc_g_parm(file, arg);
return 0;
}
static int vidioc_enuminput(struct file *file, struct v4l2_input *arg)
{
uint32_t index = arg->index;
@ -2322,6 +2392,12 @@ static int v4l2_ioctl(int fd, unsigned long int request, void *arg)
case VIDIOC_TRY_FMT:
res = vidioc_try_fmt(file, (struct v4l2_format *)arg);
break;
case VIDIOC_G_PARM:
res = vidioc_g_parm(file, (struct v4l2_streamparm *)arg);
break;
case VIDIOC_S_PARM:
res = vidioc_s_parm(file, (struct v4l2_streamparm *)arg);
break;
case VIDIOC_ENUMINPUT:
res = vidioc_enuminput(file, (struct v4l2_input *)arg);
break;