pstn-free/baresip
1
0
Fork 0
mirror of https://github.com/baresip/baresip synced 2026-08-07 00:26:06 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

v4l2: enumerate resolutions (#3643)

Browse source 
Searches all pixelformats for the resolution that is closest to the
wanted
This commit is contained in:
Christian Spielberger 2026-02-06 09:53:16 +01:00 • committed by GitHub
parent 4a1c24fc3f
commit 87a6fce1a6
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
1 changed files with 32 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

34
modules/v4l2/v4l2.c
View file

@ -197,6 +197,31 @@ static int init_mmap(struct vidsrc_st *st, const char *dev_name)
}
static uint32_t v4l2_enum_sizes(struct vidsrc_st *st, u_int32_t pixfmt,
int width, int height)
{
struct v4l2_frmsizeenum frmsize;
uint32_t diff = (uint32_t) -1;
memset(&frmsize, 0, sizeof(frmsize));
frmsize.pixel_format = pixfmt;
for (frmsize.index=0;
!v4l2_ioctl(st->fd, VIDIOC_ENUM_FRAMESIZES, &frmsize);
frmsize.index++) {
if (frmsize.type == V4L2_FRMSIZE_TYPE_DISCRETE) {
int ds = abs((int) frmsize.discrete.width - width) +
abs((int) frmsize.discrete.height - height);
if ((uint32_t) ds < diff)
diff = (uint32_t) ds;
if (diff == 0)
break;
}
}
return diff;
}
static int v4l2_init_device(struct vidsrc_st *st, const char *dev_name,
int width, int height)
{
@ -233,11 +258,16 @@ static int v4l2_init_device(struct vidsrc_st *st, const char *dev_name,
memset(&fmts, 0, sizeof(fmts));
fmts.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
uint32_t diff_min = (uint32_t) -1;
for (fmts.index=0; !v4l2_ioctl(st->fd, VIDIOC_ENUM_FMT, &fmts);
fmts.index++) {
if (match_fmt(fmts.pixelformat) != VID_FMT_N) {
st->pixfmt = fmts.pixelformat;
break;
uint32_t diff = v4l2_enum_sizes(st, fmts.pixelformat,
width, height);
if (diff < diff_min) {
diff_min = diff;
st->pixfmt = fmts.pixelformat;
}
}
}