1. 根目录:
2. drivers
3. media
4. platform
5. vivid
6. vivid-vid-common.h

/*
 * vivid-vid-common.h - common video support functions.
 *
 * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
 *
 * This program is free software; you may redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef _VIVID_VID_COMMON_H_
#define _VIVID_VID_COMMON_H_

typedef int (*fmtfunc)(struct file *file, void *priv, struct v4l2_format *f);

/*
 * Conversion function that converts a single-planar format to a
 * single-plane multiplanar format.
 */
void fmt_sp2mp(const struct v4l2_format *sp_fmt, struct v4l2_format *mp_fmt);
int fmt_sp2mp_func(struct file *file, void *priv,
		struct v4l2_format *f, fmtfunc func);

extern const struct v4l2_dv_timings_cap vivid_dv_timings_cap;

const struct vivid_fmt *vivid_get_format(struct vivid_dev *dev, u32 pixelformat);

bool vivid_vid_can_loop(struct vivid_dev *dev);
void vivid_send_source_change(struct vivid_dev *dev, unsigned type);

bool rect_overlap(const struct v4l2_rect *r1, const struct v4l2_rect *r2);
void rect_set_size_to(struct v4l2_rect *r, const struct v4l2_rect *size);
void rect_set_min_size(struct v4l2_rect *r, const struct v4l2_rect *min_size);
void rect_set_max_size(struct v4l2_rect *r, const struct v4l2_rect *max_size);
void rect_map_inside(struct v4l2_rect *r, const struct v4l2_rect *boundary);
bool rect_same_size(const struct v4l2_rect *r1, const struct v4l2_rect *r2);
struct v4l2_rect rect_intersect(const struct v4l2_rect *a, const struct v4l2_rect *b);
void rect_scale(struct v4l2_rect *r, const struct v4l2_rect *from,
				     const struct v4l2_rect *to);
int vivid_vid_adjust_sel(unsigned flags, struct v4l2_rect *r);

int vivid_enum_fmt_vid(struct file *file, void  *priv, struct v4l2_fmtdesc *f);
int vidioc_enum_fmt_vid_mplane(struct file *file, void  *priv, struct v4l2_fmtdesc *f);
int vidioc_enum_fmt_vid(struct file *file, void  *priv, struct v4l2_fmtdesc *f);
int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id);
int vidioc_g_dv_timings(struct file *file, void *_fh, struct v4l2_dv_timings *timings);
int vidioc_enum_dv_timings(struct file *file, void *_fh, struct v4l2_enum_dv_timings *timings);
int vidioc_dv_timings_cap(struct file *file, void *_fh, struct v4l2_dv_timings_cap *cap);
int vidioc_g_edid(struct file *file, void *_fh, struct v4l2_edid *edid);
int vidioc_subscribe_event(struct v4l2_fh *fh, const struct v4l2_event_subscription *sub);

#endif