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authorValentin Zagura <puthre@gmail.com>2006-05-22 10:31:59 -0300
committerMauro Carvalho Chehab <mchehab@infradead.org>2006-06-25 02:00:04 -0300
commit2544bf2d619d09b564fbdd451fe4b1ba798f9c03 (patch)
treed3c6f67a413db292e0a9bf93a1e2efcb25dfc491
parent07f640f0ddd72e6158fca7f0694dbaf95cee4d2c (diff)
V4L/DVB (3973): Cx88-blackbird: pause the encoder during frequency change
Added code to cx88-blackbird.c to treat the VIDIOC_S_FREQUENCY ioctl to stop mpeg stream before changing the frequency and restart it after. It seems that the mpeg stream needs to be paused while changing the channel frequency, otherwise the mpeg encoder enters into a bad state, producing artifacts. Signed-off-by: Valentin Zagura <puthre@gmail.com> Signed-off-by: Michael Krufky <mkrufky@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
-rw-r--r--drivers/media/video/cx88/cx88-blackbird.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/media/video/cx88/cx88-blackbird.c b/drivers/media/video/cx88/cx88-blackbird.c
index 997b9b87b54..036f87643e1 100644
--- a/drivers/media/video/cx88/cx88-blackbird.c
+++ b/drivers/media/video/cx88/cx88-blackbird.c
@@ -1456,6 +1456,20 @@ static int mpeg_do_ioctl(struct inode *inode, struct file *file,
blackbird_set_params(dev, f);
return 0;
}
+ case VIDIOC_S_FREQUENCY:
+ {
+ blackbird_api_cmd(fh->dev, CX2341X_ENC_STOP_CAPTURE, 3, 0,
+ BLACKBIRD_END_NOW,
+ BLACKBIRD_MPEG_CAPTURE,
+ BLACKBIRD_RAW_BITS_NONE);
+
+ cx88_do_ioctl( inode, file, 0, dev->core, cmd, arg, cx88_ioctl_hook );
+
+ blackbird_initialize_codec(dev);
+ cx88_set_scale(dev->core, dev->width, dev->height,
+ fh->mpegq.field);
+ return 0;
+ }
default:
return cx88_do_ioctl( inode, file, 0, dev->core, cmd, arg, cx88_ioctl_hook );