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v4l2: return a default format from G_FMT

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This commit is contained in:
Wim Taymans 2022-11-04 10:59:13 +01:00
parent 73ad5d9057
commit 5a262b4bd3
1 changed files with 31 additions and 2 deletions
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31
pipewire-v4l2/src/pipewire-v4l2.c
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@ -1466,11 +1466,40 @@ static int vidioc_enum_fmt(struct file *file, struct v4l2_fmtdesc *arg)
static int vidioc_g_fmt(struct file *file, struct v4l2_format *arg) static int vidioc_g_fmt(struct file *file, struct v4l2_format *arg)
{ {
struct param *p;
struct global *g = file->node;
int res;
if (arg->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) if (arg->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL; return -EINVAL;
pw_thread_loop_lock(file->loop);
if (file->v4l2_format.fmt.pix.pixelformat != 0) {
*arg = file->v4l2_format; *arg = file->v4l2_format;
return 0; } else {
struct v4l2_format tmp;
bool found = false;
spa_list_for_each(p, &g->param_list, link) {
if (p->id != SPA_PARAM_EnumFormat || p->param == NULL)
continue;
if (param_to_fmt(p->param, &tmp) < 0)
continue;
found = true;
break;
}
if (!found) {
res = -EINVAL;
goto exit_unlock;
}
*arg = file->v4l2_format = tmp;
}
res = 0;
exit_unlock:
pw_thread_loop_unlock(file->loop);
return res;
} }
static int score_diff(struct v4l2_format *fmt, struct v4l2_format *tmp) static int score_diff(struct v4l2_format *fmt, struct v4l2_format *tmp)