diff options
| author | Andy Walls <awalls@radix.net> | 2009-05-16 21:06:57 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-06-16 18:21:14 -0300 |
| commit | 929a3ad1525895c394cbe97a6b74792da9a865a6 (patch) | |
| tree | f047e4a623c537da202f0cb5a4a242469da62dc7 /drivers/media/video/cx18/cx18-av-core.c | |
| parent | 5ab740522fbee3a2ef83554b9a9c92692c8c0f74 (diff) | |
V4L/DVB (11864): cx18: Complete support for Sliced and Raw VBI for 625 line systems
Finish changes for sliced and raw VBI for 625 line systems. Tested with VPS
and WSS being emitted by a PVR-350 in field 1 lines 16 and 23.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/cx18/cx18-av-core.c')
| -rw-r--r-- | drivers/media/video/cx18/cx18-av-core.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/drivers/media/video/cx18/cx18-av-core.c b/drivers/media/video/cx18/cx18-av-core.c index d98010e0da9c..33ec269a0f5e 100644 --- a/drivers/media/video/cx18/cx18-av-core.c +++ b/drivers/media/video/cx18/cx18-av-core.c @@ -299,13 +299,13 @@ void cx18_av_std_setup(struct cx18 *cx) if (std & V4L2_STD_625_50) { /* * The following relationships of half line counts should hold: - * 625 = vblank656 + vactive + postvactive + * 625 = vblank656 + vactive * 10 = vblank656 - vblank = vsync pulses + equalization pulses * * vblank656: half lines after line 625/mid-313 of blanked video * vblank: half lines, after line 5/317, of blanked video - * vactive: half lines of active video - * postvactive: 5 half lines after the end of active video + * vactive: half lines of active video + + * 5 half lines after the end of active video * * As far as I can tell: * vblank656 starts counting from the falling edge of the first @@ -316,10 +316,21 @@ void cx18_av_std_setup(struct cx18 *cx) * For 625 line systems the driver will extract VBI information * from lines 6-23 and lines 318-335 (but the slicer can only * handle 17 lines, not the 18 in the vblank region). + * In addition, we need vblank656 and vblank to be one whole + * line longer, to cover line 24 and 336, so the SAV/EAV RP + * codes get generated such that the encoder can actually + * extract line 23 & 335 (WSS). We'll lose 1 line in each field + * at the top of the screen. + * + * It appears the 5 half lines that happen after active + * video must be included in vactive (579 instead of 574), + * otherwise the colors get badly displayed in various regions + * of the screen. I guess the chroma comb filter gets confused + * without them (at least when a PVR-350 is the PAL source). */ - vblank656 = 46; /* lines 1 - 23 & 313 - 335 */ - vblank = 36; /* lines 6 - 23 & 318 - 335 */ - vactive = 574; /* lines 24 - 310 & 336 - 622 */ + vblank656 = 48; /* lines 1 - 24 & 313 - 336 */ + vblank = 38; /* lines 6 - 24 & 318 - 336 */ + vactive = 579; /* lines 24 - 313 & 337 - 626 */ /* * For a 13.5 Mpps clock and 15,625 Hz line rate, a line is @@ -989,9 +1000,9 @@ static int cx18_av_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt) * cx18_av_std_setup(), above standard values: * * 480 + 1 for 60 Hz systems - * 576 - 2 for 50 Hz systems + * 576 + 3 for 50 Hz systems */ - Vlines = pix->height + (is_50Hz ? -2 : 1); + Vlines = pix->height + (is_50Hz ? 3 : 1); /* * Invalid height and width scaling requests are: |