From 01cbc214cfa6e0dbfaea617d32d6d66e7f6608ff Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Sat, 7 Feb 2009 01:31:22 -0300 Subject: [PATCH] V4L/DVB (10444): cx18: Fix sliced VBI PTS and fix artifacts in last raw line of field Fixed an endianess problem with the collection of the PTS from the VBI buffer given to us by the encoder. Also extrapolated the last 12 bytes of the last line of each field, to remove artifacts created by removing the first 12 bytes of each field for raw VBI. Signed-off-by: Andy Walls Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx18/cx18-vbi.c | 24 +++++++++++++++++++----- 1 file changed, 19 insertions(+), 5 deletions(-) diff --git a/drivers/media/video/cx18/cx18-vbi.c b/drivers/media/video/cx18/cx18-vbi.c index d6e15e11958..d8e7d371c8e 100644 --- a/drivers/media/video/cx18/cx18-vbi.c +++ b/drivers/media/video/cx18/cx18-vbi.c @@ -179,6 +179,10 @@ void cx18_process_vbi_data(struct cx18 *cx, struct cx18_buffer *buf, if (streamtype != CX18_ENC_STREAM_TYPE_VBI) return; + /* + * The CX23418 sends us data that is 32 bit LE swapped, but we want + * the raw VBI bytes in the order they were in the raster line + */ cx18_buf_swap(buf); /* @@ -190,17 +194,27 @@ void cx18_process_vbi_data(struct cx18 *cx, struct cx18_buffer *buf, if (cx18_raw_vbi(cx)) { u8 type; - /* Skip 12 bytes of header that gets stuffed in */ + /* + * We've set up to get a field's worth of VBI data at a time. + * Skip 12 bytes of header prefixing the first field or the + * last 12 bytes in the last VBI line from the first field that + * prefixes the second field. + */ size -= 12; memcpy(p, &buf->buf[12], size); type = p[3]; + /* Extrapolate the last 12 bytes of the field's last line */ + memset(&p[size], (int) p[size - 1], 12); + size = buf->bytesused = compress_raw_buf(cx, p, size); - /* second field of the frame? */ if (type == raw_vbi_sav_rp[1]) { - /* Dirty hack needed for backwards - compatibility of old VBI software. */ + /* + * Hack needed for compatibility with old VBI software. + * Write the frame # at the end of the last line of the + * second field + */ p += size - 4; memcpy(p, &cx->vbi.frame, 4); cx->vbi.frame++; @@ -210,7 +224,7 @@ void cx18_process_vbi_data(struct cx18 *cx, struct cx18_buffer *buf, /* Sliced VBI data with data insertion */ - pts = (q[0] == 0x3fffffff) ? q[2] : 0; + pts = (be32_to_cpu(q[0] == 0x3fffffff)) ? be32_to_cpu(q[2]) : 0; /* first field */ /* compress_sliced_buf() will skip the 12 bytes of header */ -- 2.41.0