mirror of https://gitee.com/openkylin/linux.git
66 lines
2.2 KiB
C
66 lines
2.2 KiB
C
/*
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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 (*isoc_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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