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| author | Mauro Carvalho Chehab <mchehab@infradead.org> | 2007-05-22 10:30:04 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2007-05-22 10:30:04 -0300 |
| commit | 4a78e983d25641804f5c0c83b6c10e51063b7872 (patch) | |
| tree | ce0631476907751234d1d60ee9d1f72e18b30de2 /v4l2-apps/lib | |
| parent | 2a03de082a1ec685712a48cedb06a73d5d607088 (diff) | |
| parent | 126b42f75f3d60cf024d206f8d7fb8680903cf8a (diff) | |
| download | mediapointer-dvb-s2-4a78e983d25641804f5c0c83b6c10e51063b7872.tar.gz mediapointer-dvb-s2-4a78e983d25641804f5c0c83b6c10e51063b7872.tar.bz2 | |
merge: http://linuxtv.org/hg/~aapot/m920x
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 | 59 | ||||
| -rw-r--r-- | v4l2-apps/lib/v4l2_driver.h | 3 |
2 files changed, 61 insertions, 1 deletions
diff --git a/v4l2-apps/lib/v4l2_driver.c b/v4l2-apps/lib/v4l2_driver.c index 24ed2846b..94f826968 100644 --- a/v4l2-apps/lib/v4l2_driver.c +++ b/v4l2-apps/lib/v4l2_driver.c @@ -211,7 +211,7 @@ int v4l2_enum_stds (struct v4l2_driver *drv) p->index=i; ok=xioctl(drv->fd,VIDIOC_ENUMSTD,p); if (ok<0) { - ok=errno; + ok=-errno; free(p); break; } @@ -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); + |