diff options
Diffstat (limited to 'drivers/media/video/cx18/cx18-vbi.c')
| -rw-r--r-- | drivers/media/video/cx18/cx18-vbi.c | 277 |
1 files changed, 0 insertions, 277 deletions
diff --git a/drivers/media/video/cx18/cx18-vbi.c b/drivers/media/video/cx18/cx18-vbi.c deleted file mode 100644 index 6d3121ff45a2..000000000000 --- a/drivers/media/video/cx18/cx18-vbi.c +++ /dev/null @@ -1,277 +0,0 @@ -/* - * cx18 Vertical Blank Interval support functions - * - * Derived from ivtv-vbi.c - * - * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - * 02111-1307 USA - */ - -#include "cx18-driver.h" -#include "cx18-vbi.h" -#include "cx18-ioctl.h" -#include "cx18-queue.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 ancillary 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; - int i; - u32 linemask[2] = { 0, 0 }; - unsigned short size; - static const u8 mpeg_hdr_data[] = { - /* 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; - u8 *dst = &cx->vbi.sliced_mpeg_data[idx][0]; - - for (i = 0; i < lines; i++) { - struct v4l2_sliced_vbi_data *sdata = cx->vbi.sliced_data + i; - int f, l; - - if (sdata->id == 0) - continue; - - l = sdata->line - 6; - f = sdata->field; - if (f) - l += 18; - if (l < 32) - linemask[0] |= (1 << l); - else - linemask[1] |= (1 << (l - 32)); - dst[sd + 12 + line * 43] = cx18_service2vbi(sdata->id); - memcpy(dst + sd + 12 + line * 43 + 1, sdata->data, 42); - line++; - } - memcpy(dst, mpeg_hdr_data, sizeof(mpeg_hdr_data)); - if (line == 36) { - /* All lines are used, so there is no space for the linemask - (the max size of the VBI data is 36 * 43 + 4 bytes). - So in this case we use the magic number 'ITV0'. */ - memcpy(dst + sd, "ITV0", 4); - memcpy(dst + sd + 4, dst + sd + 12, line * 43); - size = 4 + ((43 * line + 3) & ~3); - } else { - memcpy(dst + sd, "itv0", 4); - cpu_to_le32s(&linemask[0]); - cpu_to_le32s(&linemask[1]); - memcpy(dst + sd + 4, &linemask[0], 8); - size = 12 + ((43 * line + 3) & ~3); - } - dst[4+16] = (size + 10) >> 8; - dst[5+16] = (size + 10) & 0xff; - dst[9+16] = 0x21 | ((pts_stamp >> 29) & 0x6); - dst[10+16] = (pts_stamp >> 22) & 0xff; - dst[11+16] = 1 | ((pts_stamp >> 14) & 0xff); - dst[12+16] = (pts_stamp >> 7) & 0xff; - dst[13+16] = 1 | ((pts_stamp & 0x7f) << 1); - cx->vbi.sliced_mpeg_size[idx] = sd + size; -} - -/* Compress raw VBI format, removes leading SAV codes and surplus space - after the frame. Returns new compressed size. */ -/* FIXME - this function ignores the input size. */ -static u32 compress_raw_buf(struct cx18 *cx, u8 *buf, u32 size, u32 hdr_size) -{ - u32 line_size = vbi_active_samples; - u32 lines = cx->vbi.count * 2; - u8 *q = buf; - u8 *p; - int i; - - /* Skip the header */ - buf += hdr_size; - - for (i = 0; i < lines; i++) { - p = buf + i * line_size; - - /* Look for SAV code */ - if (p[0] != 0xff || p[1] || p[2] || - (p[3] != raw_vbi_sav_rp[0] && - p[3] != raw_vbi_sav_rp[1])) - break; - if (i == lines - 1) { - /* last line is hdr_size bytes short - extrapolate it */ - memcpy(q, p + 4, line_size - 4 - hdr_size); - q += line_size - 4 - hdr_size; - p += line_size - hdr_size - 1; - memset(q, (int) *p, hdr_size); - } else { - memcpy(q, p + 4, line_size - 4); - q += line_size - 4; - } - } - return lines * (line_size - 4); -} - -static u32 compress_sliced_buf(struct cx18 *cx, u8 *buf, u32 size, - const u32 hdr_size) -{ - struct v4l2_decode_vbi_line vbi; - int i; - u32 line = 0; - u32 line_size = cx->is_60hz ? vbi_hblank_samples_60Hz - : vbi_hblank_samples_50Hz; - - /* find the first valid line */ - for (i = hdr_size, buf += hdr_size; i < size; i++, buf++) { - if (buf[0] == 0xff && !buf[1] && !buf[2] && - (buf[3] == sliced_vbi_eav_rp[0] || - buf[3] == sliced_vbi_eav_rp[1])) - break; - } - - /* - * The last line is short by hdr_size bytes, but for the remaining - * checks against size, we pretend that it is not, by counting the - * header bytes we knowingly skipped - */ - size -= (i - hdr_size); - if (size < line_size) - return line; - - for (i = 0; i < size / line_size; i++) { - u8 *p = buf + i * line_size; - - /* Look for EAV code */ - if (p[0] != 0xff || p[1] || p[2] || - (p[3] != sliced_vbi_eav_rp[0] && - p[3] != sliced_vbi_eav_rp[1])) - continue; - vbi.p = p + 4; - v4l2_subdev_call(cx->sd_av, vbi, decode_vbi_line, &vbi); - if (vbi.type) { - cx->vbi.sliced_data[line].id = vbi.type; - cx->vbi.sliced_data[line].field = vbi.is_second_field; - cx->vbi.sliced_data[line].line = vbi.line; - memcpy(cx->vbi.sliced_data[line].data, vbi.p, 42); - line++; - } - } - return line; -} - -static void _cx18_process_vbi_data(struct cx18 *cx, struct cx18_buffer *buf) -{ - /* - * The CX23418 provides a 12 byte header in its raw VBI buffers to us: - * 0x3fffffff [4 bytes of something] [4 byte presentation time stamp] - */ - struct vbi_data_hdr { - __be32 magic; - __be32 unknown; - __be32 pts; - } *hdr = (struct vbi_data_hdr *) buf->buf; - - u8 *p = (u8 *) buf->buf; - u32 size = buf->bytesused; - u32 pts; - int lines; - - /* - * The CX23418 sends us data that is 32 bit little-endian swapped, - * but we want the raw VBI bytes in the order they were in the raster - * line. This has a side effect of making the header big endian - */ - cx18_buf_swap(buf); - - /* Raw VBI data */ - if (cx18_raw_vbi(cx)) { - - size = buf->bytesused = - compress_raw_buf(cx, p, size, sizeof(struct vbi_data_hdr)); - - /* - * Hack needed for compatibility with old VBI software. - * Write the frame # at the last 4 bytes of the frame - */ - p += size - 4; - memcpy(p, &cx->vbi.frame, 4); - cx->vbi.frame++; - return; - } - - /* Sliced VBI data with data insertion */ - - pts = (be32_to_cpu(hdr->magic) == 0x3fffffff) ? be32_to_cpu(hdr->pts) - : 0; - - lines = compress_sliced_buf(cx, p, size, sizeof(struct vbi_data_hdr)); - - /* always return at least one empty line */ - if (lines == 0) { - cx->vbi.sliced_data[0].id = 0; - cx->vbi.sliced_data[0].line = 0; - cx->vbi.sliced_data[0].field = 0; - lines = 1; - } - buf->bytesused = size = lines * sizeof(cx->vbi.sliced_data[0]); - memcpy(p, &cx->vbi.sliced_data[0], size); - - if (cx->vbi.insert_mpeg) - copy_vbi_data(cx, lines, pts); - cx->vbi.frame++; -} - -void cx18_process_vbi_data(struct cx18 *cx, struct cx18_mdl *mdl, - int streamtype) -{ - struct cx18_buffer *buf; - u32 orig_used; - - if (streamtype != CX18_ENC_STREAM_TYPE_VBI) - return; - - /* - * Big assumption here: - * Every buffer hooked to the MDL's buf_list is a complete VBI frame - * that ends at the end of the buffer. - * - * To assume anything else would make the code in this file - * more complex, or require extra memcpy()'s to make the - * buffers satisfy the above assumption. It's just simpler to set - * up the encoder buffer transfers to make the assumption true. - */ - list_for_each_entry(buf, &mdl->buf_list, list) { - orig_used = buf->bytesused; - if (orig_used == 0) - break; - _cx18_process_vbi_data(cx, buf); - mdl->bytesused -= (orig_used - buf->bytesused); - } -} |