2 cx231xx_vbi.h - driver for Conexant Cx23100/101/102 USB video capture devices
4 Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #ifndef _CX231XX_VBI_H
23 #define _CX231XX_VBI_H
25 extern struct videobuf_queue_ops cx231xx_vbi_qops
;
28 #define NTSC_VBI_START_LINE 10 /* line 10 - 21 */
29 #define NTSC_VBI_END_LINE 21
30 #define NTSC_VBI_LINES (NTSC_VBI_END_LINE - NTSC_VBI_START_LINE + 1)
32 #define PAL_VBI_START_LINE 6
33 #define PAL_VBI_END_LINE 23
34 #define PAL_VBI_LINES (PAL_VBI_END_LINE - PAL_VBI_START_LINE + 1)
36 #define VBI_STRIDE 1440
37 #define VBI_SAMPLES_PER_LINE 1440
39 #define CX231XX_NUM_VBI_PACKETS 4
40 #define CX231XX_NUM_VBI_BUFS 5
42 /* stream functions */
43 int cx231xx_init_vbi_isoc(struct cx231xx
*dev
, int max_packets
,
44 int num_bufs
, int max_pkt_size
,
45 int (*isoc_copy
) (struct cx231xx
*dev
, struct urb
*urb
));
47 void cx231xx_uninit_vbi_isoc(struct cx231xx
*dev
);
49 /* vbi data copy functions */
50 u32
cx231xx_get_vbi_line(struct cx231xx
*dev
, struct cx231xx_dmaqueue
*dma_q
,
51 u8 sav_eav
, u8
*p_buffer
, u32 buffer_size
);
52 u32
cx231xx_copy_vbi_line(struct cx231xx
*dev
, struct cx231xx_dmaqueue
*dma_q
,
53 u8
*p_line
, u32 length
, int field_number
);
54 void cx231xx_reset_vbi_buffer(struct cx231xx
*dev
, struct cx231xx_dmaqueue
*dma_q
);
56 int cx231xx_do_vbi_copy(struct cx231xx
*dev
, struct cx231xx_dmaqueue
*dma_q
,
57 u8
*p_buffer
, u32 bytes_to_copy
);
59 u8
cx231xx_is_vbi_buffer_done(struct cx231xx
*dev
,struct cx231xx_dmaqueue
*dma_q
);