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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/media/video/cx231xx/cx231xx-vbi.h
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/*

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   cx231xx_vbi.h - driver for Conexant Cx23100/101/102 USB video capture devices

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   Copyright (C) 2008 <srinivasa.deevi at conexant dot com>

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		Based on cx88 driver

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   This program is free software; you can redistribute it and/or modify

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   it under the terms of the GNU General Public License as published by

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   the Free Software Foundation; either version 2 of the License, or

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   (at your option) any later version.

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   This program is distributed in the hope that it will be useful,

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   but WITHOUT ANY WARRANTY; without even the implied warranty of

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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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   GNU General Public License for more details.

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   You should have received a copy of the GNU General Public License

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   along with this program; if not, write to the Free Software

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   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

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 */

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#ifndef _CX231XX_VBI_H

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#define _CX231XX_VBI_H

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extern struct videobuf_queue_ops cx231xx_vbi_qops;

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#define   NTSC_VBI_START_LINE 10	/* line 10 - 21 */

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#define   NTSC_VBI_END_LINE   21

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#define   NTSC_VBI_LINES	  (NTSC_VBI_END_LINE-NTSC_VBI_START_LINE+1)

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#define   PAL_VBI_START_LINE  6

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#define   PAL_VBI_END_LINE    23

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#define   PAL_VBI_LINES       (PAL_VBI_END_LINE-PAL_VBI_START_LINE+1)

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#define   VBI_STRIDE            1440

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#define   VBI_SAMPLES_PER_LINE  1440

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#define   CX231XX_NUM_VBI_PACKETS       4

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#define   CX231XX_NUM_VBI_BUFS          5

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/* stream functions */

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int cx231xx_init_vbi_isoc(struct cx231xx *dev, int max_packets,

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			  int num_bufs, int max_pkt_size,

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			  int (*bulk_copy) (struct cx231xx *dev,

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					    struct urb *urb));

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void cx231xx_uninit_vbi_isoc(struct cx231xx *dev);

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/* vbi data copy functions */

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u32 cx231xx_get_vbi_line(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q,

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			 u8 sav_eav, u8 *p_buffer, u32 buffer_size);

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u32 cx231xx_copy_vbi_line(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q,

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			  u8 *p_line, u32 length, int field_number);

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void cx231xx_reset_vbi_buffer(struct cx231xx *dev,

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			      struct cx231xx_dmaqueue *dma_q);

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int cx231xx_do_vbi_copy(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q,

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			u8 *p_buffer, u32 bytes_to_copy);

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u8 cx231xx_is_vbi_buffer_done(struct cx231xx *dev,

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			      struct cx231xx_dmaqueue *dma_q);

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#endif

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