drivers/media/usb/cx231xx/cx231xx-vbi.h

   1 /*
   2    cx231xx_vbi.h - driver for Conexant Cx23100/101/102 USB video capture devices
   3
   4    Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
   5                 Based on cx88 driver
   6
   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.
  11
  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.
  16
  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.
  20  */
  21
  22 #ifndef _CX231XX_VBI_H
  23 #define _CX231XX_VBI_H
  24
  25 extern struct videobuf_queue_ops cx231xx_vbi_qops;
  26
  27 #define   NTSC_VBI_START_LINE 10        /* line 10 - 21 */
  28 #define   NTSC_VBI_END_LINE   21
  29 #define   NTSC_VBI_LINES          (NTSC_VBI_END_LINE-NTSC_VBI_START_LINE+1)
  30
  31 #define   PAL_VBI_START_LINE  6
  32 #define   PAL_VBI_END_LINE    23
  33 #define   PAL_VBI_LINES       (PAL_VBI_END_LINE-PAL_VBI_START_LINE+1)
  34
  35 #define   VBI_STRIDE            1440
  36 #define   VBI_SAMPLES_PER_LINE  1440
  37
  38 #define   CX231XX_NUM_VBI_PACKETS       4
  39 #define   CX231XX_NUM_VBI_BUFS          5
  40
  41 /* stream functions */
  42 int cx231xx_init_vbi_isoc(struct cx231xx *dev, int max_packets,
  43                           int num_bufs, int max_pkt_size,
  44                           int (*bulk_copy) (struct cx231xx *dev,
  45                                             struct urb *urb));
  46
  47 void cx231xx_uninit_vbi_isoc(struct cx231xx *dev);
  48
  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
  53 u32 cx231xx_copy_vbi_line(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q,
  54                           u8 *p_line, u32 length, int field_number);
  55
  56 void cx231xx_reset_vbi_buffer(struct cx231xx *dev,
  57                               struct cx231xx_dmaqueue *dma_q);
  58
  59 int cx231xx_do_vbi_copy(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q,
  60                         u8 *p_buffer, u32 bytes_to_copy);
  61
  62 u8 cx231xx_is_vbi_buffer_done(struct cx231xx *dev,
  63                               struct cx231xx_dmaqueue *dma_q);
  64
  65 #endif