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closedcaption: zvbi: Enforce strict line21 CC detection

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zvbi switched to a lot more flexible CC detection in VBI.

The problem is that it returns a *lot* of non-VBI lines as containing
CC which isn't the case.
This commit is contained in:
Edward Hervey 2018-03-19 10:52:08 +01:00 committed by Edward Hervey
parent 7ea93b9f94
commit 61334a38a3
1 changed files with 11 additions and 2 deletions
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13
ext/closedcaption/raw_decoder.c
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@ -198,13 +198,16 @@ const _vbi_service_par _vbi_service_table[] = {
{21, 0},
{21, 0},
10500, 1006976, 503488, /* 32 x FH */
#if 0
/* Test of CRI bits has been removed to handle the
incorrect signal observed by Rich Kandel (see
_VBI_RAW_SHIFT_CC_CRI). */
0x03, 0x0F, 4, 0, 2 * 8, VBI_MODULATION_NRZ_LSB,
/* 0x00005551, 0x7FF, 14, 2, 2 * 8, VBI_MODULATION_NRZ_LSB, */
#else
0x00005551, 0x7FF, 14, 2, 2 * 8, VBI_MODULATION_NRZ_LSB,
/* I've seen CC signals on other lines and there's no
way to distinguish from the transmitted data. */
#endif
_VBI_SP_FIELD_NUM | _VBI_SP_LINE_NUM,
}, {
VBI_SLICED_CAPTION_525_F2,
@ -213,8 +216,14 @@ const _vbi_service_par _vbi_service_table[] = {
{0, 284},
{0, 284},
10500, 1006976, 503488, /* 32 x FH */
#if 0
/* Test of CRI bits has been removed to handle the
incorrect signal observed by Rich Kandel (see
_VBI_RAW_SHIFT_CC_CRI). */
0x03, 0x0F, 4, 0, 2 * 8, VBI_MODULATION_NRZ_LSB,
/* 0x00005551, 0x7FF, 14, 2, 2 * 8, VBI_MODULATION_NRZ_LSB, */
#else
0x00005551, 0x7FF, 14, 2, 2 * 8, VBI_MODULATION_NRZ_LSB,
#endif
_VBI_SP_FIELD_NUM | _VBI_SP_LINE_NUM,
}, {
VBI_SLICED_2xCAPTION_525, /* NOT CONFIRMED */