diff options
Diffstat (limited to 'drivers/media/video/cx18/cx18-vbi.c')
| -rw-r--r-- | drivers/media/video/cx18/cx18-vbi.c | 58 |
1 files changed, 41 insertions, 17 deletions
diff --git a/drivers/media/video/cx18/cx18-vbi.c b/drivers/media/video/cx18/cx18-vbi.c index fb595bd548e8..38d26c42e4cb 100644 --- a/drivers/media/video/cx18/cx18-vbi.c +++ b/drivers/media/video/cx18/cx18-vbi.c @@ -27,6 +27,16 @@ #include "cx18-queue.h" #include "cx18-av-core.h" +/* + * Raster Reference/Protection (RP) bytes, used in Start/End Active + * Video codes emitted from the digitzer in VIP 1.x mode, that flag the start + * of VBI sample or VBI ancilliary data regions in the digitial ratser line. + * + * Task FieldEven VerticalBlank HorizontalBlank 0 0 0 0 + */ +static const u8 raw_vbi_sav_rp[2] = { 0x20, 0x60 }; /* __V_, _FV_ */ +static const u8 sliced_vbi_eav_rp[2] = { 0xb0, 0xf0 }; /* T_VH, TFVH */ + static void copy_vbi_data(struct cx18 *cx, int lines, u32 pts_stamp) { int line = 0; @@ -34,10 +44,17 @@ static void copy_vbi_data(struct cx18 *cx, int lines, u32 pts_stamp) u32 linemask[2] = { 0, 0 }; unsigned short size; static const u8 mpeg_hdr_data[] = { - 0x00, 0x00, 0x01, 0xba, 0x44, 0x00, 0x0c, 0x66, - 0x24, 0x01, 0x01, 0xd1, 0xd3, 0xfa, 0xff, 0xff, - 0x00, 0x00, 0x01, 0xbd, 0x00, 0x1a, 0x84, 0x80, - 0x07, 0x21, 0x00, 0x5d, 0x63, 0xa7, 0xff, 0xff + /* MPEG-2 Program Pack */ + 0x00, 0x00, 0x01, 0xba, /* Prog Pack start code */ + 0x44, 0x00, 0x0c, 0x66, 0x24, 0x01, /* SCR, SCR Ext, markers */ + 0x01, 0xd1, 0xd3, /* Mux Rate, markers */ + 0xfa, 0xff, 0xff, /* Res, Suff cnt, Stuff */ + /* MPEG-2 Private Stream 1 PES Packet */ + 0x00, 0x00, 0x01, 0xbd, /* Priv Stream 1 start */ + 0x00, 0x1a, /* length */ + 0x84, 0x80, 0x07, /* flags, hdr data len */ + 0x21, 0x00, 0x5d, 0x63, 0xa7, /* PTS, markers */ + 0xff, 0xff /* stuffing */ }; const int sd = sizeof(mpeg_hdr_data); /* start of vbi data */ int idx = cx->vbi.frame % CX18_VBI_FRAMES; @@ -71,7 +88,7 @@ static void copy_vbi_data(struct cx18 *cx, int lines, u32 pts_stamp) memcpy(dst + sd + 4, dst + sd + 12, line * 43); size = 4 + ((43 * line + 3) & ~3); } else { - memcpy(dst + sd, "cx0", 4); + memcpy(dst + sd, "itv0", 4); memcpy(dst + sd + 4, &linemask[0], 8); size = 12 + ((43 * line + 3) & ~3); } @@ -90,10 +107,10 @@ static void copy_vbi_data(struct cx18 *cx, int lines, u32 pts_stamp) Returns new compressed size. */ static u32 compress_raw_buf(struct cx18 *cx, u8 *buf, u32 size) { - u32 line_size = cx->vbi.raw_decoder_line_size; + u32 line_size = vbi_active_samples; u32 lines = cx->vbi.count; - u8 sav1 = cx->vbi.raw_decoder_sav_odd_field; - u8 sav2 = cx->vbi.raw_decoder_sav_even_field; + u8 sav1 = raw_vbi_sav_rp[0]; + u8 sav2 = raw_vbi_sav_rp[1]; u8 *q = buf; u8 *p; int i; @@ -115,15 +132,16 @@ static u32 compress_raw_buf(struct cx18 *cx, u8 *buf, u32 size) /* Compressed VBI format, all found sliced blocks put next to one another Returns new compressed size */ static u32 compress_sliced_buf(struct cx18 *cx, u32 line, u8 *buf, - u32 size, u8 sav) + u32 size, u8 eav) { - u32 line_size = cx->vbi.sliced_decoder_line_size; struct v4l2_decode_vbi_line vbi; int i; + u32 line_size = cx->is_60hz ? vbi_hblank_samples_60Hz + : vbi_hblank_samples_50Hz; /* find the first valid line */ for (i = 0; i < size; i++, buf++) { - if (buf[0] == 0xff && !buf[1] && !buf[2] && buf[3] == sav) + if (buf[0] == 0xff && !buf[1] && !buf[2] && buf[3] == eav) break; } @@ -133,8 +151,8 @@ static u32 compress_sliced_buf(struct cx18 *cx, u32 line, u8 *buf, for (i = 0; i < size / line_size; i++) { u8 *p = buf + i * line_size; - /* Look for SAV code */ - if (p[0] != 0xff || p[1] || p[2] || p[3] != sav) + /* Look for EAV code */ + if (p[0] != 0xff || p[1] || p[2] || p[3] != eav) continue; vbi.p = p + 4; cx18_av_cmd(cx, VIDIOC_INT_DECODE_VBI_LINE, &vbi); @@ -159,6 +177,12 @@ void cx18_process_vbi_data(struct cx18 *cx, struct cx18_buffer *buf, if (streamtype != CX18_ENC_STREAM_TYPE_VBI) return; + /* + * Note the CX23418 provides a 12 byte header, in it's raw VBI + * buffers to us, that we currently throw away: + * 0x3fffffff [4 bytes of something] [4 byte timestamp] + */ + /* Raw VBI data */ if (cx18_raw_vbi(cx)) { u8 type; @@ -173,7 +197,7 @@ void cx18_process_vbi_data(struct cx18 *cx, struct cx18_buffer *buf, size = buf->bytesused = compress_raw_buf(cx, p, size); /* second field of the frame? */ - if (type == cx->vbi.raw_decoder_sav_even_field) { + if (type == raw_vbi_sav_rp[1]) { /* Dirty hack needed for backwards compatibility of old VBI software. */ p += size - 4; @@ -187,14 +211,14 @@ void cx18_process_vbi_data(struct cx18 *cx, struct cx18_buffer *buf, cx18_buf_swap(buf); /* first field */ - lines = compress_sliced_buf(cx, 0, p, size / 2, - cx->vbi.sliced_decoder_sav_odd_field); + /* compress_sliced_buf() will skip the 12 bytes of header */ + lines = compress_sliced_buf(cx, 0, p, size / 2, sliced_vbi_eav_rp[0]); /* second field */ /* experimentation shows that the second half does not always begin at the exact address. So start a bit earlier (hence 32). */ lines = compress_sliced_buf(cx, lines, p + size / 2 - 32, - size / 2 + 32, cx->vbi.sliced_decoder_sav_even_field); + size / 2 + 32, sliced_vbi_eav_rp[1]); /* always return at least one empty line */ if (lines == 0) { cx->vbi.sliced_data[0].id = 0; |