737 lines
22 KiB
C
737 lines
22 KiB
C
/*
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* Video for Linux Two
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*
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* A generic video device interface for the LINUX operating system
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* using a set of device structures/vectors for low level operations.
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*
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* This file replaces the videodev.c file that comes with the
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* regular kernel distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Author: Bill Dirks <bill@thedirks.org>
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* based on code by Alan Cox, <alan@cymru.net>
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*
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*/
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/*
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* Video capture interface for Linux
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*
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* A generic video device interface for the LINUX operating system
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* using a set of device structures/vectors for low level operations.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Author: Alan Cox, <alan@redhat.com>
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*
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* Fixes:
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*/
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/*
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* Video4linux 1/2 integration by Justin Schoeman
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* <justin@suntiger.ee.up.ac.za>
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* 2.4 PROCFS support ported from 2.4 kernels by
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* Iñaki García Etxebarria <garetxe@euskalnet.net>
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* Makefile fix by "W. Michael Petullo" <mike@flyn.org>
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* 2.4 devfs support ported from 2.4 kernels by
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* Dan Merillat <dan@merillat.org>
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* Added Gerd Knorrs v4l1 enhancements (Justin Schoeman)
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/i2c.h>
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#include <asm/uaccess.h>
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#include <asm/system.h>
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#include <asm/pgtable.h>
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#include <asm/io.h>
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#include <asm/div64.h>
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#define __OLD_VIDIOC_ /* To allow fixing old calls*/
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#include <media/v4l2-common.h>
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#include <media/v4l2-chip-ident.h>
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#ifdef CONFIG_KMOD
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#include <linux/kmod.h>
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#endif
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#include <linux/videodev.h>
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MODULE_AUTHOR("Bill Dirks, Justin Schoeman, Gerd Knorr");
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MODULE_DESCRIPTION("misc helper functions for v4l2 device drivers");
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MODULE_LICENSE("GPL");
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/*
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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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*/
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/*
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* Video Standard Operations (contributed by Michael Schimek)
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*/
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/* ----------------------------------------------------------------- */
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/* priority handling */
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#define V4L2_PRIO_VALID(val) (val == V4L2_PRIORITY_BACKGROUND || \
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val == V4L2_PRIORITY_INTERACTIVE || \
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val == V4L2_PRIORITY_RECORD)
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int v4l2_prio_init(struct v4l2_prio_state *global)
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{
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memset(global,0,sizeof(*global));
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return 0;
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}
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EXPORT_SYMBOL(v4l2_prio_init);
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int v4l2_prio_change(struct v4l2_prio_state *global, enum v4l2_priority *local,
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enum v4l2_priority new)
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{
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if (!V4L2_PRIO_VALID(new))
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return -EINVAL;
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if (*local == new)
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return 0;
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atomic_inc(&global->prios[new]);
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if (V4L2_PRIO_VALID(*local))
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atomic_dec(&global->prios[*local]);
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*local = new;
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return 0;
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}
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EXPORT_SYMBOL(v4l2_prio_change);
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int v4l2_prio_open(struct v4l2_prio_state *global, enum v4l2_priority *local)
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{
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return v4l2_prio_change(global,local,V4L2_PRIORITY_DEFAULT);
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}
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EXPORT_SYMBOL(v4l2_prio_open);
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int v4l2_prio_close(struct v4l2_prio_state *global, enum v4l2_priority *local)
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{
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if (V4L2_PRIO_VALID(*local))
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atomic_dec(&global->prios[*local]);
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return 0;
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}
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EXPORT_SYMBOL(v4l2_prio_close);
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enum v4l2_priority v4l2_prio_max(struct v4l2_prio_state *global)
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{
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if (atomic_read(&global->prios[V4L2_PRIORITY_RECORD]) > 0)
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return V4L2_PRIORITY_RECORD;
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if (atomic_read(&global->prios[V4L2_PRIORITY_INTERACTIVE]) > 0)
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return V4L2_PRIORITY_INTERACTIVE;
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if (atomic_read(&global->prios[V4L2_PRIORITY_BACKGROUND]) > 0)
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return V4L2_PRIORITY_BACKGROUND;
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return V4L2_PRIORITY_UNSET;
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}
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EXPORT_SYMBOL(v4l2_prio_max);
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int v4l2_prio_check(struct v4l2_prio_state *global, enum v4l2_priority *local)
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{
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if (*local < v4l2_prio_max(global))
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return -EBUSY;
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return 0;
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}
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EXPORT_SYMBOL(v4l2_prio_check);
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/* ----------------------------------------------------------------- */
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/* Helper functions for control handling */
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/* Check for correctness of the ctrl's value based on the data from
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struct v4l2_queryctrl and the available menu items. Note that
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menu_items may be NULL, in that case it is ignored. */
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int v4l2_ctrl_check(struct v4l2_ext_control *ctrl, struct v4l2_queryctrl *qctrl,
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const char **menu_items)
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{
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if (qctrl->flags & V4L2_CTRL_FLAG_DISABLED)
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return -EINVAL;
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if (qctrl->flags & V4L2_CTRL_FLAG_GRABBED)
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return -EBUSY;
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if (qctrl->type == V4L2_CTRL_TYPE_BUTTON ||
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qctrl->type == V4L2_CTRL_TYPE_INTEGER64 ||
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qctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
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return 0;
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if (ctrl->value < qctrl->minimum || ctrl->value > qctrl->maximum)
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return -ERANGE;
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if (qctrl->type == V4L2_CTRL_TYPE_MENU && menu_items != NULL) {
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if (menu_items[ctrl->value] == NULL ||
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menu_items[ctrl->value][0] == '\0')
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return -EINVAL;
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}
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return 0;
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}
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EXPORT_SYMBOL(v4l2_ctrl_check);
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/* Returns NULL or a character pointer array containing the menu for
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the given control ID. The pointer array ends with a NULL pointer.
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An empty string signifies a menu entry that is invalid. This allows
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drivers to disable certain options if it is not supported. */
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const char **v4l2_ctrl_get_menu(u32 id)
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{
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static const char *mpeg_audio_sampling_freq[] = {
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"44.1 kHz",
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"48 kHz",
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"32 kHz",
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NULL
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};
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static const char *mpeg_audio_encoding[] = {
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"Layer I",
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"Layer II",
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"Layer III",
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NULL
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};
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static const char *mpeg_audio_l1_bitrate[] = {
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"32 kbps",
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"64 kbps",
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"96 kbps",
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"128 kbps",
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"160 kbps",
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"192 kbps",
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"224 kbps",
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"256 kbps",
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"288 kbps",
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"320 kbps",
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"352 kbps",
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"384 kbps",
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"416 kbps",
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"448 kbps",
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NULL
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};
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static const char *mpeg_audio_l2_bitrate[] = {
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"32 kbps",
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"48 kbps",
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"56 kbps",
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"64 kbps",
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"80 kbps",
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"96 kbps",
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"112 kbps",
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"128 kbps",
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"160 kbps",
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"192 kbps",
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"224 kbps",
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"256 kbps",
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"320 kbps",
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"384 kbps",
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NULL
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};
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static const char *mpeg_audio_l3_bitrate[] = {
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"32 kbps",
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"40 kbps",
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"48 kbps",
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"56 kbps",
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"64 kbps",
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"80 kbps",
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"96 kbps",
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"112 kbps",
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"128 kbps",
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"160 kbps",
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"192 kbps",
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"224 kbps",
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"256 kbps",
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"320 kbps",
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NULL
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};
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static const char *mpeg_audio_mode[] = {
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"Stereo",
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"Joint Stereo",
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"Dual",
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"Mono",
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NULL
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};
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static const char *mpeg_audio_mode_extension[] = {
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"Bound 4",
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"Bound 8",
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"Bound 12",
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"Bound 16",
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NULL
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};
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static const char *mpeg_audio_emphasis[] = {
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"No Emphasis",
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"50/15 us",
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"CCITT J17",
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NULL
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};
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static const char *mpeg_audio_crc[] = {
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"No CRC",
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"16-bit CRC",
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NULL
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};
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static const char *mpeg_video_encoding[] = {
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"MPEG-1",
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"MPEG-2",
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NULL
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};
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static const char *mpeg_video_aspect[] = {
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"1x1",
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"4x3",
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"16x9",
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"2.21x1",
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NULL
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};
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static const char *mpeg_video_bitrate_mode[] = {
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"Variable Bitrate",
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"Constant Bitrate",
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NULL
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};
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static const char *mpeg_stream_type[] = {
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"MPEG-2 Program Stream",
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"MPEG-2 Transport Stream",
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"MPEG-1 System Stream",
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"MPEG-2 DVD-compatible Stream",
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"MPEG-1 VCD-compatible Stream",
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"MPEG-2 SVCD-compatible Stream",
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NULL
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};
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static const char *mpeg_stream_vbi_fmt[] = {
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"No VBI",
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"Private packet, IVTV format",
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NULL
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};
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switch (id) {
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case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
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return mpeg_audio_sampling_freq;
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case V4L2_CID_MPEG_AUDIO_ENCODING:
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return mpeg_audio_encoding;
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case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
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return mpeg_audio_l1_bitrate;
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case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
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return mpeg_audio_l2_bitrate;
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case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
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return mpeg_audio_l3_bitrate;
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case V4L2_CID_MPEG_AUDIO_MODE:
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return mpeg_audio_mode;
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case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
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return mpeg_audio_mode_extension;
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case V4L2_CID_MPEG_AUDIO_EMPHASIS:
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return mpeg_audio_emphasis;
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case V4L2_CID_MPEG_AUDIO_CRC:
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return mpeg_audio_crc;
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case V4L2_CID_MPEG_VIDEO_ENCODING:
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return mpeg_video_encoding;
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case V4L2_CID_MPEG_VIDEO_ASPECT:
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return mpeg_video_aspect;
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case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
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return mpeg_video_bitrate_mode;
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case V4L2_CID_MPEG_STREAM_TYPE:
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return mpeg_stream_type;
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case V4L2_CID_MPEG_STREAM_VBI_FMT:
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return mpeg_stream_vbi_fmt;
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default:
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return NULL;
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}
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}
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EXPORT_SYMBOL(v4l2_ctrl_get_menu);
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/* Fill in a struct v4l2_queryctrl */
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int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 step, s32 def)
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{
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const char *name;
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qctrl->flags = 0;
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switch (qctrl->id) {
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/* USER controls */
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case V4L2_CID_USER_CLASS: name = "User Controls"; break;
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case V4L2_CID_AUDIO_VOLUME: name = "Volume"; break;
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case V4L2_CID_AUDIO_MUTE: name = "Mute"; break;
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case V4L2_CID_AUDIO_BALANCE: name = "Balance"; break;
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case V4L2_CID_AUDIO_BASS: name = "Bass"; break;
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case V4L2_CID_AUDIO_TREBLE: name = "Treble"; break;
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case V4L2_CID_AUDIO_LOUDNESS: name = "Loudness"; break;
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case V4L2_CID_BRIGHTNESS: name = "Brightness"; break;
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case V4L2_CID_CONTRAST: name = "Contrast"; break;
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case V4L2_CID_SATURATION: name = "Saturation"; break;
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case V4L2_CID_HUE: name = "Hue"; break;
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/* MPEG controls */
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case V4L2_CID_MPEG_CLASS: name = "MPEG Encoder Controls"; break;
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case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: name = "Audio Sampling Frequency"; break;
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case V4L2_CID_MPEG_AUDIO_ENCODING: name = "Audio Encoding Layer"; break;
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case V4L2_CID_MPEG_AUDIO_L1_BITRATE: name = "Audio Layer I Bitrate"; break;
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case V4L2_CID_MPEG_AUDIO_L2_BITRATE: name = "Audio Layer II Bitrate"; break;
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case V4L2_CID_MPEG_AUDIO_L3_BITRATE: name = "Audio Layer III Bitrate"; break;
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case V4L2_CID_MPEG_AUDIO_MODE: name = "Audio Stereo Mode"; break;
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case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: name = "Audio Stereo Mode Extension"; break;
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case V4L2_CID_MPEG_AUDIO_EMPHASIS: name = "Audio Emphasis"; break;
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case V4L2_CID_MPEG_AUDIO_CRC: name = "Audio CRC"; break;
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case V4L2_CID_MPEG_AUDIO_MUTE: name = "Audio Mute"; break;
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case V4L2_CID_MPEG_VIDEO_ENCODING: name = "Video Encoding"; break;
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case V4L2_CID_MPEG_VIDEO_ASPECT: name = "Video Aspect"; break;
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case V4L2_CID_MPEG_VIDEO_B_FRAMES: name = "Video B Frames"; break;
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case V4L2_CID_MPEG_VIDEO_GOP_SIZE: name = "Video GOP Size"; break;
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case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: name = "Video GOP Closure"; break;
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case V4L2_CID_MPEG_VIDEO_PULLDOWN: name = "Video Pulldown"; break;
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case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: name = "Video Bitrate Mode"; break;
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case V4L2_CID_MPEG_VIDEO_BITRATE: name = "Video Bitrate"; break;
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case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: name = "Video Peak Bitrate"; break;
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case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: name = "Video Temporal Decimation"; break;
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case V4L2_CID_MPEG_VIDEO_MUTE: name = "Video Mute"; break;
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case V4L2_CID_MPEG_VIDEO_MUTE_YUV: name = "Video Mute YUV"; break;
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case V4L2_CID_MPEG_STREAM_TYPE: name = "Stream Type"; break;
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case V4L2_CID_MPEG_STREAM_PID_PMT: name = "Stream PMT Program ID"; break;
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case V4L2_CID_MPEG_STREAM_PID_AUDIO: name = "Stream Audio Program ID"; break;
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case V4L2_CID_MPEG_STREAM_PID_VIDEO: name = "Stream Video Program ID"; break;
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case V4L2_CID_MPEG_STREAM_PID_PCR: name = "Stream PCR Program ID"; break;
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case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: name = "Stream PES Audio ID"; break;
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case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: name = "Stream PES Video ID"; break;
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case V4L2_CID_MPEG_STREAM_VBI_FMT: name = "Stream VBI Format"; break;
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default:
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return -EINVAL;
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}
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switch (qctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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case V4L2_CID_AUDIO_LOUDNESS:
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case V4L2_CID_MPEG_AUDIO_MUTE:
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case V4L2_CID_MPEG_VIDEO_MUTE:
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case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
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case V4L2_CID_MPEG_VIDEO_PULLDOWN:
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qctrl->type = V4L2_CTRL_TYPE_BOOLEAN;
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min = 0;
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max = step = 1;
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break;
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case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
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case V4L2_CID_MPEG_AUDIO_ENCODING:
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case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
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case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
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case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
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case V4L2_CID_MPEG_AUDIO_MODE:
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case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
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case V4L2_CID_MPEG_AUDIO_EMPHASIS:
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case V4L2_CID_MPEG_AUDIO_CRC:
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case V4L2_CID_MPEG_VIDEO_ENCODING:
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case V4L2_CID_MPEG_VIDEO_ASPECT:
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case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
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case V4L2_CID_MPEG_STREAM_TYPE:
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case V4L2_CID_MPEG_STREAM_VBI_FMT:
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qctrl->type = V4L2_CTRL_TYPE_MENU;
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step = 1;
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break;
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case V4L2_CID_USER_CLASS:
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case V4L2_CID_MPEG_CLASS:
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qctrl->type = V4L2_CTRL_TYPE_CTRL_CLASS;
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qctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
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min = max = step = def = 0;
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break;
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default:
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qctrl->type = V4L2_CTRL_TYPE_INTEGER;
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break;
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}
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switch (qctrl->id) {
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case V4L2_CID_MPEG_AUDIO_ENCODING:
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case V4L2_CID_MPEG_AUDIO_MODE:
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case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
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case V4L2_CID_MPEG_VIDEO_B_FRAMES:
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case V4L2_CID_MPEG_STREAM_TYPE:
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qctrl->flags |= V4L2_CTRL_FLAG_UPDATE;
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break;
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case V4L2_CID_AUDIO_VOLUME:
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case V4L2_CID_AUDIO_BALANCE:
|
|
case V4L2_CID_AUDIO_BASS:
|
|
case V4L2_CID_AUDIO_TREBLE:
|
|
case V4L2_CID_BRIGHTNESS:
|
|
case V4L2_CID_CONTRAST:
|
|
case V4L2_CID_SATURATION:
|
|
case V4L2_CID_HUE:
|
|
qctrl->flags |= V4L2_CTRL_FLAG_SLIDER;
|
|
break;
|
|
}
|
|
qctrl->minimum = min;
|
|
qctrl->maximum = max;
|
|
qctrl->step = step;
|
|
qctrl->default_value = def;
|
|
qctrl->reserved[0] = qctrl->reserved[1] = 0;
|
|
snprintf(qctrl->name, sizeof(qctrl->name), name);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(v4l2_ctrl_query_fill);
|
|
|
|
/* Fill in a struct v4l2_queryctrl with standard values based on
|
|
the control ID. */
|
|
int v4l2_ctrl_query_fill_std(struct v4l2_queryctrl *qctrl)
|
|
{
|
|
switch (qctrl->id) {
|
|
/* USER controls */
|
|
case V4L2_CID_USER_CLASS:
|
|
case V4L2_CID_MPEG_CLASS:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, 0, 0, 0);
|
|
case V4L2_CID_AUDIO_VOLUME:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, 65535, 65535 / 100, 58880);
|
|
case V4L2_CID_AUDIO_MUTE:
|
|
case V4L2_CID_AUDIO_LOUDNESS:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0);
|
|
case V4L2_CID_AUDIO_BALANCE:
|
|
case V4L2_CID_AUDIO_BASS:
|
|
case V4L2_CID_AUDIO_TREBLE:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, 65535, 65535 / 100, 32768);
|
|
case V4L2_CID_BRIGHTNESS:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 128);
|
|
case V4L2_CID_CONTRAST:
|
|
case V4L2_CID_SATURATION:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, 127, 1, 64);
|
|
case V4L2_CID_HUE:
|
|
return v4l2_ctrl_query_fill(qctrl, -128, 127, 1, 0);
|
|
|
|
/* MPEG controls */
|
|
case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
|
|
return v4l2_ctrl_query_fill(qctrl,
|
|
V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100,
|
|
V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000, 1,
|
|
V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000);
|
|
case V4L2_CID_MPEG_AUDIO_ENCODING:
|
|
return v4l2_ctrl_query_fill(qctrl,
|
|
V4L2_MPEG_AUDIO_ENCODING_LAYER_1,
|
|
V4L2_MPEG_AUDIO_ENCODING_LAYER_3, 1,
|
|
V4L2_MPEG_AUDIO_ENCODING_LAYER_2);
|
|
case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
|
|
return v4l2_ctrl_query_fill(qctrl,
|
|
V4L2_MPEG_AUDIO_L1_BITRATE_32K,
|
|
V4L2_MPEG_AUDIO_L1_BITRATE_448K, 1,
|
|
V4L2_MPEG_AUDIO_L1_BITRATE_256K);
|
|
case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
|
|
return v4l2_ctrl_query_fill(qctrl,
|
|
V4L2_MPEG_AUDIO_L2_BITRATE_32K,
|
|
V4L2_MPEG_AUDIO_L2_BITRATE_384K, 1,
|
|
V4L2_MPEG_AUDIO_L2_BITRATE_224K);
|
|
case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
|
|
return v4l2_ctrl_query_fill(qctrl,
|
|
V4L2_MPEG_AUDIO_L3_BITRATE_32K,
|
|
V4L2_MPEG_AUDIO_L3_BITRATE_320K, 1,
|
|
V4L2_MPEG_AUDIO_L3_BITRATE_192K);
|
|
case V4L2_CID_MPEG_AUDIO_MODE:
|
|
return v4l2_ctrl_query_fill(qctrl,
|
|
V4L2_MPEG_AUDIO_MODE_STEREO,
|
|
V4L2_MPEG_AUDIO_MODE_MONO, 1,
|
|
V4L2_MPEG_AUDIO_MODE_STEREO);
|
|
case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
|
|
return v4l2_ctrl_query_fill(qctrl,
|
|
V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_4,
|
|
V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_16, 1,
|
|
V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_4);
|
|
case V4L2_CID_MPEG_AUDIO_EMPHASIS:
|
|
return v4l2_ctrl_query_fill(qctrl,
|
|
V4L2_MPEG_AUDIO_EMPHASIS_NONE,
|
|
V4L2_MPEG_AUDIO_EMPHASIS_CCITT_J17, 1,
|
|
V4L2_MPEG_AUDIO_EMPHASIS_NONE);
|
|
case V4L2_CID_MPEG_AUDIO_CRC:
|
|
return v4l2_ctrl_query_fill(qctrl,
|
|
V4L2_MPEG_AUDIO_CRC_NONE,
|
|
V4L2_MPEG_AUDIO_CRC_CRC16, 1,
|
|
V4L2_MPEG_AUDIO_CRC_NONE);
|
|
case V4L2_CID_MPEG_AUDIO_MUTE:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0);
|
|
case V4L2_CID_MPEG_VIDEO_ENCODING:
|
|
return v4l2_ctrl_query_fill(qctrl,
|
|
V4L2_MPEG_VIDEO_ENCODING_MPEG_1,
|
|
V4L2_MPEG_VIDEO_ENCODING_MPEG_2, 1,
|
|
V4L2_MPEG_VIDEO_ENCODING_MPEG_2);
|
|
case V4L2_CID_MPEG_VIDEO_ASPECT:
|
|
return v4l2_ctrl_query_fill(qctrl,
|
|
V4L2_MPEG_VIDEO_ASPECT_1x1,
|
|
V4L2_MPEG_VIDEO_ASPECT_221x100, 1,
|
|
V4L2_MPEG_VIDEO_ASPECT_4x3);
|
|
case V4L2_CID_MPEG_VIDEO_B_FRAMES:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, 33, 1, 2);
|
|
case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
|
|
return v4l2_ctrl_query_fill(qctrl, 1, 34, 1, 12);
|
|
case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 1);
|
|
case V4L2_CID_MPEG_VIDEO_PULLDOWN:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0);
|
|
case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
|
|
return v4l2_ctrl_query_fill(qctrl,
|
|
V4L2_MPEG_VIDEO_BITRATE_MODE_VBR,
|
|
V4L2_MPEG_VIDEO_BITRATE_MODE_CBR, 1,
|
|
V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
|
|
case V4L2_CID_MPEG_VIDEO_BITRATE:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, 27000000, 1, 6000000);
|
|
case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, 27000000, 1, 8000000);
|
|
case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 0);
|
|
case V4L2_CID_MPEG_VIDEO_MUTE:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0);
|
|
case V4L2_CID_MPEG_VIDEO_MUTE_YUV: /* Init YUV (really YCbCr) to black */
|
|
return v4l2_ctrl_query_fill(qctrl, 0, 0xffffff, 1, 0x008080);
|
|
case V4L2_CID_MPEG_STREAM_TYPE:
|
|
return v4l2_ctrl_query_fill(qctrl,
|
|
V4L2_MPEG_STREAM_TYPE_MPEG2_PS,
|
|
V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD, 1,
|
|
V4L2_MPEG_STREAM_TYPE_MPEG2_PS);
|
|
case V4L2_CID_MPEG_STREAM_PID_PMT:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 16);
|
|
case V4L2_CID_MPEG_STREAM_PID_AUDIO:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 260);
|
|
case V4L2_CID_MPEG_STREAM_PID_VIDEO:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 256);
|
|
case V4L2_CID_MPEG_STREAM_PID_PCR:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 259);
|
|
case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 0);
|
|
case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO:
|
|
return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 0);
|
|
case V4L2_CID_MPEG_STREAM_VBI_FMT:
|
|
return v4l2_ctrl_query_fill(qctrl,
|
|
V4L2_MPEG_STREAM_VBI_FMT_NONE,
|
|
V4L2_MPEG_STREAM_VBI_FMT_IVTV, 1,
|
|
V4L2_MPEG_STREAM_VBI_FMT_NONE);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(v4l2_ctrl_query_fill_std);
|
|
|
|
/* Fill in a struct v4l2_querymenu based on the struct v4l2_queryctrl and
|
|
the menu. The qctrl pointer may be NULL, in which case it is ignored. */
|
|
int v4l2_ctrl_query_menu(struct v4l2_querymenu *qmenu, struct v4l2_queryctrl *qctrl,
|
|
const char **menu_items)
|
|
{
|
|
int i;
|
|
|
|
if (menu_items == NULL ||
|
|
(qctrl && (qmenu->index < qctrl->minimum || qmenu->index > qctrl->maximum)))
|
|
return -EINVAL;
|
|
for (i = 0; i < qmenu->index && menu_items[i]; i++) ;
|
|
if (menu_items[i] == NULL || menu_items[i][0] == '\0')
|
|
return -EINVAL;
|
|
snprintf(qmenu->name, sizeof(qmenu->name), menu_items[qmenu->index]);
|
|
qmenu->reserved = 0;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(v4l2_ctrl_query_menu);
|
|
|
|
/* ctrl_classes points to an array of u32 pointers, the last element is
|
|
a NULL pointer. Each u32 array is a 0-terminated array of control IDs.
|
|
Each array must be sorted low to high and belong to the same control
|
|
class. The array of u32 pointer must also be sorted, from low class IDs
|
|
to high class IDs.
|
|
|
|
This function returns the first ID that follows after the given ID.
|
|
When no more controls are available 0 is returned. */
|
|
u32 v4l2_ctrl_next(const u32 * const * ctrl_classes, u32 id)
|
|
{
|
|
u32 ctrl_class = V4L2_CTRL_ID2CLASS(id);
|
|
const u32 *pctrl;
|
|
|
|
if (ctrl_classes == NULL)
|
|
return 0;
|
|
|
|
/* if no query is desired, then check if the ID is part of ctrl_classes */
|
|
if ((id & V4L2_CTRL_FLAG_NEXT_CTRL) == 0) {
|
|
/* find class */
|
|
while (*ctrl_classes && V4L2_CTRL_ID2CLASS(**ctrl_classes) != ctrl_class)
|
|
ctrl_classes++;
|
|
if (*ctrl_classes == NULL)
|
|
return 0;
|
|
pctrl = *ctrl_classes;
|
|
/* find control ID */
|
|
while (*pctrl && *pctrl != id) pctrl++;
|
|
return *pctrl ? id : 0;
|
|
}
|
|
id &= V4L2_CTRL_ID_MASK;
|
|
id++; /* select next control */
|
|
/* find first class that matches (or is greater than) the class of
|
|
the ID */
|
|
while (*ctrl_classes && V4L2_CTRL_ID2CLASS(**ctrl_classes) < ctrl_class)
|
|
ctrl_classes++;
|
|
/* no more classes */
|
|
if (*ctrl_classes == NULL)
|
|
return 0;
|
|
pctrl = *ctrl_classes;
|
|
/* find first ctrl within the class that is >= ID */
|
|
while (*pctrl && *pctrl < id) pctrl++;
|
|
if (*pctrl)
|
|
return *pctrl;
|
|
/* we are at the end of the controls of the current class. */
|
|
/* continue with next class if available */
|
|
ctrl_classes++;
|
|
if (*ctrl_classes == NULL)
|
|
return 0;
|
|
return **ctrl_classes;
|
|
}
|
|
EXPORT_SYMBOL(v4l2_ctrl_next);
|
|
|
|
int v4l2_chip_match_host(u32 match_type, u32 match_chip)
|
|
{
|
|
switch (match_type) {
|
|
case V4L2_CHIP_MATCH_HOST:
|
|
return match_chip == 0;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(v4l2_chip_match_host);
|
|
|
|
#if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE))
|
|
int v4l2_chip_match_i2c_client(struct i2c_client *c, u32 match_type, u32 match_chip)
|
|
{
|
|
switch (match_type) {
|
|
case V4L2_CHIP_MATCH_I2C_DRIVER:
|
|
return (c != NULL && c->driver != NULL && c->driver->id == match_chip);
|
|
case V4L2_CHIP_MATCH_I2C_ADDR:
|
|
return (c != NULL && c->addr == match_chip);
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(v4l2_chip_match_i2c_client);
|
|
|
|
int v4l2_chip_ident_i2c_client(struct i2c_client *c, struct v4l2_chip_ident *chip,
|
|
u32 ident, u32 revision)
|
|
{
|
|
if (!v4l2_chip_match_i2c_client(c, chip->match_type, chip->match_chip))
|
|
return 0;
|
|
if (chip->ident == V4L2_IDENT_NONE) {
|
|
chip->ident = ident;
|
|
chip->revision = revision;
|
|
}
|
|
else {
|
|
chip->ident = V4L2_IDENT_AMBIGUOUS;
|
|
chip->revision = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(v4l2_chip_ident_i2c_client);
|
|
|
|
/* ----------------------------------------------------------------- */
|
|
|
|
/* Helper function for I2C legacy drivers */
|
|
|
|
int v4l2_i2c_attach(struct i2c_adapter *adapter, int address, struct i2c_driver *driver,
|
|
const char *name, int (*probe)(struct i2c_client *))
|
|
{
|
|
struct i2c_client *client;
|
|
int err;
|
|
|
|
client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
|
|
if (client == 0)
|
|
return -ENOMEM;
|
|
|
|
client->addr = address;
|
|
client->adapter = adapter;
|
|
client->driver = driver;
|
|
strlcpy(client->name, name, sizeof(client->name));
|
|
|
|
err = probe(client);
|
|
if (err == 0) {
|
|
i2c_attach_client(client);
|
|
} else {
|
|
kfree(client);
|
|
}
|
|
return err != -ENOMEM ? 0 : err;
|
|
}
|
|
EXPORT_SYMBOL(v4l2_i2c_attach);
|
|
#endif
|