From 2544bf2d619d09b564fbdd451fe4b1ba798f9c03 Mon Sep 17 00:00:00 2001 From: Valentin Zagura Date: Mon, 22 May 2006 10:31:59 -0300 Subject: [PATCH] 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 Signed-off-by: Michael Krufky Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx88/cx88-blackbird.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/media/video/cx88/cx88-blackbird.c b/drivers/media/video/cx88/cx88-blackbird.c index 997b9b87b5..036f87643e 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 ); -- 2.39.5