ivtv-fileops.h

linux内核源码

/*
    file operation functions
    Copyright (C) 2003-2004  Kevin Thayer <nufan_wfk at yahoo.com>
    Copyright (C) 2005-2007  Hans Verkuil <[e-mail]>

    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
 */

#ifndef IVTV_FILEOPS_H
#define IVTV_FILEOPS_H

/* Testing/Debugging */
int ivtv_v4l2_open(struct inode *inode, struct file *filp);
ssize_t ivtv_v4l2_read(struct file *filp, char __user *buf, size_t count,
		      loff_t * pos);
ssize_t ivtv_v4l2_write(struct file *filp, const char __user *buf, size_t count,
		       loff_t * pos);
int ivtv_v4l2_close(struct inode *inode, struct file *filp);
unsigned int ivtv_v4l2_enc_poll(struct file *filp, poll_table * wait);
unsigned int ivtv_v4l2_dec_poll(struct file *filp, poll_table * wait);
int ivtv_start_capture(struct ivtv_open_id *id);
void ivtv_stop_capture(struct ivtv_open_id *id, int gop_end);
int ivtv_start_decoding(struct ivtv_open_id *id, int speed);
void ivtv_mute(struct ivtv *itv);
void ivtv_unmute(struct ivtv *itv);

/* Utilities */

/* Try to claim a stream for the filehandle. Return 0 on success,
   -EBUSY if stream already claimed. Once a stream is claimed, it
   remains claimed until the associated filehandle is closed. */
int ivtv_claim_stream(struct ivtv_open_id *id, int type);

/* Release a previously claimed stream. */
void ivtv_release_stream(struct ivtv_stream *s);

#endif