2150158b31
A possibility to preallocate and initialise buffers of different sizes in V4L2 is required for an efficient implementation of a snapshot mode. This patch adds two new ioctl()s: VIDIOC_CREATE_BUFS and VIDIOC_PREPARE_BUF and defines respective data structures. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
329 lines
12 KiB
C
329 lines
12 KiB
C
/*
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*
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* V 4 L 2 D R I V E R H E L P E R A P I
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*
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* Moved from videodev2.h
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*
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* Some commonly needed functions for drivers (v4l2-common.o module)
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*/
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#ifndef _V4L2_IOCTL_H
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#define _V4L2_IOCTL_H
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#include <linux/poll.h>
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#include <linux/fs.h>
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#include <linux/device.h>
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#include <linux/mutex.h>
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#include <linux/compiler.h> /* need __user */
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#include <linux/videodev2.h>
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struct v4l2_fh;
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struct v4l2_ioctl_ops {
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/* ioctl callbacks */
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/* VIDIOC_QUERYCAP handler */
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int (*vidioc_querycap)(struct file *file, void *fh, struct v4l2_capability *cap);
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/* Priority handling */
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int (*vidioc_g_priority) (struct file *file, void *fh,
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enum v4l2_priority *p);
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int (*vidioc_s_priority) (struct file *file, void *fh,
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enum v4l2_priority p);
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/* VIDIOC_ENUM_FMT handlers */
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int (*vidioc_enum_fmt_vid_cap) (struct file *file, void *fh,
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struct v4l2_fmtdesc *f);
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int (*vidioc_enum_fmt_vid_overlay) (struct file *file, void *fh,
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struct v4l2_fmtdesc *f);
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int (*vidioc_enum_fmt_vid_out) (struct file *file, void *fh,
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struct v4l2_fmtdesc *f);
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int (*vidioc_enum_fmt_vid_cap_mplane)(struct file *file, void *fh,
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struct v4l2_fmtdesc *f);
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int (*vidioc_enum_fmt_vid_out_mplane)(struct file *file, void *fh,
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struct v4l2_fmtdesc *f);
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int (*vidioc_enum_fmt_type_private)(struct file *file, void *fh,
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struct v4l2_fmtdesc *f);
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/* VIDIOC_G_FMT handlers */
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int (*vidioc_g_fmt_vid_cap) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_g_fmt_vid_overlay)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_g_fmt_vid_out) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_g_fmt_vid_out_overlay)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_g_fmt_vbi_cap) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_g_fmt_vbi_out) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_g_fmt_sliced_vbi_cap)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_g_fmt_sliced_vbi_out)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_g_fmt_vid_cap_mplane)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_g_fmt_vid_out_mplane)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_g_fmt_type_private)(struct file *file, void *fh,
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struct v4l2_format *f);
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/* VIDIOC_S_FMT handlers */
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int (*vidioc_s_fmt_vid_cap) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_s_fmt_vid_overlay)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_s_fmt_vid_out) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_s_fmt_vid_out_overlay)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_s_fmt_vbi_cap) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_s_fmt_vbi_out) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_s_fmt_sliced_vbi_cap)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_s_fmt_sliced_vbi_out)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_s_fmt_vid_cap_mplane)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_s_fmt_vid_out_mplane)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_s_fmt_type_private)(struct file *file, void *fh,
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struct v4l2_format *f);
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/* VIDIOC_TRY_FMT handlers */
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int (*vidioc_try_fmt_vid_cap) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_try_fmt_vid_overlay)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_try_fmt_vid_out) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_try_fmt_vid_out_overlay)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_try_fmt_vbi_cap) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_try_fmt_vbi_out) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_try_fmt_sliced_vbi_cap)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_try_fmt_sliced_vbi_out)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_try_fmt_vid_cap_mplane)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_try_fmt_vid_out_mplane)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_try_fmt_type_private)(struct file *file, void *fh,
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struct v4l2_format *f);
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/* Buffer handlers */
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int (*vidioc_reqbufs) (struct file *file, void *fh, struct v4l2_requestbuffers *b);
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int (*vidioc_querybuf)(struct file *file, void *fh, struct v4l2_buffer *b);
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int (*vidioc_qbuf) (struct file *file, void *fh, struct v4l2_buffer *b);
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int (*vidioc_dqbuf) (struct file *file, void *fh, struct v4l2_buffer *b);
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int (*vidioc_create_bufs)(struct file *file, void *fh, struct v4l2_create_buffers *b);
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int (*vidioc_prepare_buf)(struct file *file, void *fh, struct v4l2_buffer *b);
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int (*vidioc_overlay) (struct file *file, void *fh, unsigned int i);
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int (*vidioc_g_fbuf) (struct file *file, void *fh,
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struct v4l2_framebuffer *a);
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int (*vidioc_s_fbuf) (struct file *file, void *fh,
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struct v4l2_framebuffer *a);
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/* Stream on/off */
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int (*vidioc_streamon) (struct file *file, void *fh, enum v4l2_buf_type i);
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int (*vidioc_streamoff)(struct file *file, void *fh, enum v4l2_buf_type i);
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/* Standard handling
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ENUMSTD is handled by videodev.c
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*/
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int (*vidioc_g_std) (struct file *file, void *fh, v4l2_std_id *norm);
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int (*vidioc_s_std) (struct file *file, void *fh, v4l2_std_id *norm);
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int (*vidioc_querystd) (struct file *file, void *fh, v4l2_std_id *a);
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/* Input handling */
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int (*vidioc_enum_input)(struct file *file, void *fh,
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struct v4l2_input *inp);
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int (*vidioc_g_input) (struct file *file, void *fh, unsigned int *i);
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int (*vidioc_s_input) (struct file *file, void *fh, unsigned int i);
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/* Output handling */
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int (*vidioc_enum_output) (struct file *file, void *fh,
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struct v4l2_output *a);
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int (*vidioc_g_output) (struct file *file, void *fh, unsigned int *i);
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int (*vidioc_s_output) (struct file *file, void *fh, unsigned int i);
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/* Control handling */
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int (*vidioc_queryctrl) (struct file *file, void *fh,
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struct v4l2_queryctrl *a);
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int (*vidioc_g_ctrl) (struct file *file, void *fh,
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struct v4l2_control *a);
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int (*vidioc_s_ctrl) (struct file *file, void *fh,
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struct v4l2_control *a);
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int (*vidioc_g_ext_ctrls) (struct file *file, void *fh,
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struct v4l2_ext_controls *a);
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int (*vidioc_s_ext_ctrls) (struct file *file, void *fh,
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struct v4l2_ext_controls *a);
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int (*vidioc_try_ext_ctrls) (struct file *file, void *fh,
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struct v4l2_ext_controls *a);
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int (*vidioc_querymenu) (struct file *file, void *fh,
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struct v4l2_querymenu *a);
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/* Audio ioctls */
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int (*vidioc_enumaudio) (struct file *file, void *fh,
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struct v4l2_audio *a);
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int (*vidioc_g_audio) (struct file *file, void *fh,
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struct v4l2_audio *a);
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int (*vidioc_s_audio) (struct file *file, void *fh,
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struct v4l2_audio *a);
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/* Audio out ioctls */
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int (*vidioc_enumaudout) (struct file *file, void *fh,
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struct v4l2_audioout *a);
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int (*vidioc_g_audout) (struct file *file, void *fh,
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struct v4l2_audioout *a);
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int (*vidioc_s_audout) (struct file *file, void *fh,
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struct v4l2_audioout *a);
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int (*vidioc_g_modulator) (struct file *file, void *fh,
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struct v4l2_modulator *a);
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int (*vidioc_s_modulator) (struct file *file, void *fh,
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struct v4l2_modulator *a);
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/* Crop ioctls */
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int (*vidioc_cropcap) (struct file *file, void *fh,
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struct v4l2_cropcap *a);
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int (*vidioc_g_crop) (struct file *file, void *fh,
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struct v4l2_crop *a);
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int (*vidioc_s_crop) (struct file *file, void *fh,
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struct v4l2_crop *a);
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/* Compression ioctls */
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int (*vidioc_g_jpegcomp) (struct file *file, void *fh,
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struct v4l2_jpegcompression *a);
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int (*vidioc_s_jpegcomp) (struct file *file, void *fh,
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struct v4l2_jpegcompression *a);
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int (*vidioc_g_enc_index) (struct file *file, void *fh,
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struct v4l2_enc_idx *a);
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int (*vidioc_encoder_cmd) (struct file *file, void *fh,
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struct v4l2_encoder_cmd *a);
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int (*vidioc_try_encoder_cmd) (struct file *file, void *fh,
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struct v4l2_encoder_cmd *a);
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/* Stream type-dependent parameter ioctls */
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int (*vidioc_g_parm) (struct file *file, void *fh,
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struct v4l2_streamparm *a);
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int (*vidioc_s_parm) (struct file *file, void *fh,
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struct v4l2_streamparm *a);
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/* Tuner ioctls */
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int (*vidioc_g_tuner) (struct file *file, void *fh,
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struct v4l2_tuner *a);
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int (*vidioc_s_tuner) (struct file *file, void *fh,
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struct v4l2_tuner *a);
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int (*vidioc_g_frequency) (struct file *file, void *fh,
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struct v4l2_frequency *a);
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int (*vidioc_s_frequency) (struct file *file, void *fh,
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struct v4l2_frequency *a);
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/* Sliced VBI cap */
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int (*vidioc_g_sliced_vbi_cap) (struct file *file, void *fh,
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struct v4l2_sliced_vbi_cap *a);
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/* Log status ioctl */
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int (*vidioc_log_status) (struct file *file, void *fh);
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int (*vidioc_s_hw_freq_seek) (struct file *file, void *fh,
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struct v4l2_hw_freq_seek *a);
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/* Debugging ioctls */
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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int (*vidioc_g_register) (struct file *file, void *fh,
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struct v4l2_dbg_register *reg);
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int (*vidioc_s_register) (struct file *file, void *fh,
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struct v4l2_dbg_register *reg);
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#endif
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int (*vidioc_g_chip_ident) (struct file *file, void *fh,
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struct v4l2_dbg_chip_ident *chip);
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int (*vidioc_enum_framesizes) (struct file *file, void *fh,
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struct v4l2_frmsizeenum *fsize);
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int (*vidioc_enum_frameintervals) (struct file *file, void *fh,
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struct v4l2_frmivalenum *fival);
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/* DV Timings IOCTLs */
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int (*vidioc_enum_dv_presets) (struct file *file, void *fh,
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struct v4l2_dv_enum_preset *preset);
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int (*vidioc_s_dv_preset) (struct file *file, void *fh,
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struct v4l2_dv_preset *preset);
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int (*vidioc_g_dv_preset) (struct file *file, void *fh,
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struct v4l2_dv_preset *preset);
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int (*vidioc_query_dv_preset) (struct file *file, void *fh,
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struct v4l2_dv_preset *qpreset);
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int (*vidioc_s_dv_timings) (struct file *file, void *fh,
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struct v4l2_dv_timings *timings);
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int (*vidioc_g_dv_timings) (struct file *file, void *fh,
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struct v4l2_dv_timings *timings);
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int (*vidioc_subscribe_event) (struct v4l2_fh *fh,
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struct v4l2_event_subscription *sub);
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int (*vidioc_unsubscribe_event)(struct v4l2_fh *fh,
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struct v4l2_event_subscription *sub);
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/* For other private ioctls */
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long (*vidioc_default) (struct file *file, void *fh,
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bool valid_prio, int cmd, void *arg);
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};
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/* v4l debugging and diagnostics */
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/* Debug bitmask flags to be used on V4L2 */
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#define V4L2_DEBUG_IOCTL 0x01
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#define V4L2_DEBUG_IOCTL_ARG 0x02
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/* Use this macro for non-I2C drivers. Pass the driver name as the first arg. */
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#define v4l_print_ioctl(name, cmd) \
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do { \
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printk(KERN_DEBUG "%s: ", name); \
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v4l_printk_ioctl(cmd); \
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} while (0)
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/* Use this macro in I2C drivers where 'client' is the struct i2c_client
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pointer */
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#define v4l_i2c_print_ioctl(client, cmd) \
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do { \
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v4l_client_printk(KERN_DEBUG, client, ""); \
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v4l_printk_ioctl(cmd); \
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} while (0)
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/* Video standard functions */
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extern const char *v4l2_norm_to_name(v4l2_std_id id);
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extern void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod);
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extern int v4l2_video_std_construct(struct v4l2_standard *vs,
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int id, const char *name);
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/* Prints the ioctl in a human-readable format */
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extern void v4l_printk_ioctl(unsigned int cmd);
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/* names for fancy debug output */
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extern const char *v4l2_field_names[];
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extern const char *v4l2_type_names[];
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#ifdef CONFIG_COMPAT
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/* 32 Bits compatibility layer for 64 bits processors */
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extern long v4l2_compat_ioctl32(struct file *file, unsigned int cmd,
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unsigned long arg);
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#endif
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typedef long (*v4l2_kioctl)(struct file *file,
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unsigned int cmd, void *arg);
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/* Include support for obsoleted stuff */
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extern long video_usercopy(struct file *file, unsigned int cmd,
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unsigned long arg, v4l2_kioctl func);
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/* Standard handlers for V4L ioctl's */
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extern long video_ioctl2(struct file *file,
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unsigned int cmd, unsigned long arg);
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#endif /* _V4L2_IOCTL_H */
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