diff options
| author | Mauro Carvalho Chehab <mchehab@infradead.org> | 2007-05-08 23:19:22 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2007-05-08 23:19:22 -0300 |
| commit | 4f1a121a633c3de1bd905b3becd57955b5e2b608 (patch) | |
| tree | 859303f993775836463f03b441a938f9e6541be8 /v4l2-apps/lib | |
| parent | 02e085b956ce32aa54ff3a2e938a0919ac75c643 (diff) | |
| parent | aca3b2a0241d96ebe7198577dd48ba46b3e8079f (diff) | |
| download | mediapointer-dvb-s2-4f1a121a633c3de1bd905b3becd57955b5e2b608.tar.gz mediapointer-dvb-s2-4f1a121a633c3de1bd905b3becd57955b5e2b608.tar.bz2 | |
merge: http://linuxtv.org/hg/~mkrufky/dvb-pll-conv
From: Mauro Carvalho Chehab <mchehab@infradead.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'v4l2-apps/lib')
| -rw-r--r-- | v4l2-apps/lib/v4l2_driver.c | 57 | ||||
| -rw-r--r-- | v4l2-apps/lib/v4l2_driver.h | 3 |
2 files changed, 60 insertions, 0 deletions
diff --git a/v4l2-apps/lib/v4l2_driver.c b/v4l2-apps/lib/v4l2_driver.c index 3f7a1188f..94f826968 100644 --- a/v4l2-apps/lib/v4l2_driver.c +++ b/v4l2-apps/lib/v4l2_driver.c @@ -745,3 +745,60 @@ int v4l2_close (struct v4l2_driver *drv) return (close(drv->fd)); } + +/**************************************************************************** + Get/Set frequency + ****************************************************************************/ + +int v4l2_getset_freq (struct v4l2_driver *drv, enum v4l2_direction dir, + double *freq) +{ + struct v4l2_tuner tun; + struct v4l2_frequency frq; + double d = 62500; + unsigned int counter; + + memset(&tun, 0, sizeof(tun)); + + if (-1 == xioctl (drv->fd, VIDIOC_G_TUNER, &tun)) { + perror ("g_tuner"); + printf("Assuming 62.5 kHz step\n"); + } else { + if (tun.capability & V4L2_TUNER_CAP_LOW) + d=62.5; + } + + if (drv->debug) { + if (tun.capability & V4L2_TUNER_CAP_LOW) + printf("62.5 Hz step\n"); + else + printf("62.5 kHz step\n"); + } + + memset(&frq, 0, sizeof(frq)); + + frq.type = V4L2_TUNER_ANALOG_TV; + + if (dir & V4L2_GET) { + if (-1 == xioctl (drv->fd, VIDIOC_G_FREQUENCY, &frq)) { + perror ("s_frequency"); + return errno; + } + *freq = frq.frequency * d; + if (drv->debug) + printf("board is at freq %4.3f MHz (%d)\n", + *freq/1000000, frq.frequency); + } else { + frq.frequency = (uint32_t)(((*freq)+d/2) / d); + + if (-1 == xioctl (drv->fd, VIDIOC_S_FREQUENCY, &frq)) { + perror ("s_frequency"); + return errno; + } + if (drv->debug) + printf("board set to freq %4.3f MHz (%d)\n", + *freq/1000000, frq.frequency); + + } + return 0; +} diff --git a/v4l2-apps/lib/v4l2_driver.h b/v4l2-apps/lib/v4l2_driver.h index ef6a754f4..74d5b8358 100644 --- a/v4l2-apps/lib/v4l2_driver.h +++ b/v4l2-apps/lib/v4l2_driver.h @@ -75,3 +75,6 @@ int v4l2_free_bufs(struct v4l2_driver *drv); int v4l2_start_streaming(struct v4l2_driver *drv); int v4l2_stop_streaming(struct v4l2_driver *drv); int v4l2_rcvbuf(struct v4l2_driver *drv, v4l2_recebe_buffer *v4l2_rec_buf); +int v4l2_getset_freq (struct v4l2_driver *drv, enum v4l2_direction dir, + double *freq); + |