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path: root/drivers/media/video/v4l1-compat.c
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Diffstat (limited to 'drivers/media/video/v4l1-compat.c')
-rw-r--r--drivers/media/video/v4l1-compat.c1036
1 files changed, 1036 insertions, 0 deletions
diff --git a/drivers/media/video/v4l1-compat.c b/drivers/media/video/v4l1-compat.c
new file mode 100644
index 000000000000..b0d4bcb027d0
--- /dev/null
+++ b/drivers/media/video/v4l1-compat.c
@@ -0,0 +1,1036 @@
+/*
+ * Video for Linux Two
+ * Backward Compatibility Layer
+ *
+ * Support subroutines for providing V4L2 drivers with backward
+ * compatibility with applications using the old API.
+ *
+ * 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.
+ *
+ * Author: Bill Dirks <bdirks@pacbell.net>
+ * et al.
+ *
+ */
+
+#ifndef __KERNEL__
+#define __KERNEL__
+#endif
+
+#include <linux/config.h>
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/smp_lock.h>
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/videodev.h>
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/pgtable.h>
+
+#ifdef CONFIG_KMOD
+#include <linux/kmod.h>
+#endif
+
+static unsigned int debug = 0;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug,"enable debug messages");
+MODULE_AUTHOR("Bill Dirks");
+MODULE_DESCRIPTION("v4l(1) compatibility layer for v4l2 drivers.");
+MODULE_LICENSE("GPL");
+
+#define dprintk(fmt, arg...) if (debug) \
+ printk(KERN_DEBUG "v4l1-compat: " fmt , ## arg)
+
+/*
+ * I O C T L T R A N S L A T I O N
+ *
+ * From here on down is the code for translating the numerous
+ * ioctl commands from the old API to the new API.
+ */
+
+static int
+get_v4l_control(struct inode *inode,
+ struct file *file,
+ int cid,
+ v4l2_kioctl drv)
+{
+ struct v4l2_queryctrl qctrl2;
+ struct v4l2_control ctrl2;
+ int err;
+
+ qctrl2.id = cid;
+ err = drv(inode, file, VIDIOC_QUERYCTRL, &qctrl2);
+ if (err < 0)
+ dprintk("VIDIOC_QUERYCTRL: %d\n",err);
+ if (err == 0 &&
+ !(qctrl2.flags & V4L2_CTRL_FLAG_DISABLED))
+ {
+ ctrl2.id = qctrl2.id;
+ err = drv(inode, file, VIDIOC_G_CTRL, &ctrl2);
+ if (err < 0) {
+ dprintk("VIDIOC_G_CTRL: %d\n",err);
+ return 0;
+ }
+ return ((ctrl2.value - qctrl2.minimum) * 65535
+ + (qctrl2.maximum - qctrl2.minimum) / 2)
+ / (qctrl2.maximum - qctrl2.minimum);
+ }
+ return 0;
+}
+
+static int
+set_v4l_control(struct inode *inode,
+ struct file *file,
+ int cid,
+ int value,
+ v4l2_kioctl drv)
+{
+ struct v4l2_queryctrl qctrl2;
+ struct v4l2_control ctrl2;
+ int err;
+
+ qctrl2.id = cid;
+ err = drv(inode, file, VIDIOC_QUERYCTRL, &qctrl2);
+ if (err < 0)
+ dprintk("VIDIOC_QUERYCTRL: %d\n",err);
+ if (err == 0 &&
+ !(qctrl2.flags & V4L2_CTRL_FLAG_DISABLED) &&
+ !(qctrl2.flags & V4L2_CTRL_FLAG_GRABBED))
+ {
+ if (value < 0)
+ value = 0;
+ if (value > 65535)
+ value = 65535;
+ if (value && qctrl2.type == V4L2_CTRL_TYPE_BOOLEAN)
+ value = 65535;
+ ctrl2.id = qctrl2.id;
+ ctrl2.value =
+ (value * (qctrl2.maximum - qctrl2.minimum)
+ + 32767)
+ / 65535;
+ ctrl2.value += qctrl2.minimum;
+ err = drv(inode, file, VIDIOC_S_CTRL, &ctrl2);
+ if (err < 0)
+ dprintk("VIDIOC_S_CTRL: %d\n",err);
+ }
+ return 0;
+}
+
+/* ----------------------------------------------------------------- */
+
+static int palette2pixelformat[] = {
+ [VIDEO_PALETTE_GREY] = V4L2_PIX_FMT_GREY,
+ [VIDEO_PALETTE_RGB555] = V4L2_PIX_FMT_RGB555,
+ [VIDEO_PALETTE_RGB565] = V4L2_PIX_FMT_RGB565,
+ [VIDEO_PALETTE_RGB24] = V4L2_PIX_FMT_BGR24,
+ [VIDEO_PALETTE_RGB32] = V4L2_PIX_FMT_BGR32,
+ /* yuv packed pixel */
+ [VIDEO_PALETTE_YUYV] = V4L2_PIX_FMT_YUYV,
+ [VIDEO_PALETTE_YUV422] = V4L2_PIX_FMT_YUYV,
+ [VIDEO_PALETTE_UYVY] = V4L2_PIX_FMT_UYVY,
+ /* yuv planar */
+ [VIDEO_PALETTE_YUV410P] = V4L2_PIX_FMT_YUV410,
+ [VIDEO_PALETTE_YUV420] = V4L2_PIX_FMT_YUV420,
+ [VIDEO_PALETTE_YUV420P] = V4L2_PIX_FMT_YUV420,
+ [VIDEO_PALETTE_YUV411P] = V4L2_PIX_FMT_YUV411P,
+ [VIDEO_PALETTE_YUV422P] = V4L2_PIX_FMT_YUV422P,
+};
+
+static unsigned int
+palette_to_pixelformat(unsigned int palette)
+{
+ if (palette < ARRAY_SIZE(palette2pixelformat))
+ return palette2pixelformat[palette];
+ else
+ return 0;
+}
+
+static unsigned int
+pixelformat_to_palette(int pixelformat)
+{
+ int palette = 0;
+ switch (pixelformat)
+ {
+ case V4L2_PIX_FMT_GREY:
+ palette = VIDEO_PALETTE_GREY;
+ break;
+ case V4L2_PIX_FMT_RGB555:
+ palette = VIDEO_PALETTE_RGB555;
+ break;
+ case V4L2_PIX_FMT_RGB565:
+ palette = VIDEO_PALETTE_RGB565;
+ break;
+ case V4L2_PIX_FMT_BGR24:
+ palette = VIDEO_PALETTE_RGB24;
+ break;
+ case V4L2_PIX_FMT_BGR32:
+ palette = VIDEO_PALETTE_RGB32;
+ break;
+ /* yuv packed pixel */
+ case V4L2_PIX_FMT_YUYV:
+ palette = VIDEO_PALETTE_YUYV;
+ break;
+ case V4L2_PIX_FMT_UYVY:
+ palette = VIDEO_PALETTE_UYVY;
+ break;
+ /* yuv planar */
+ case V4L2_PIX_FMT_YUV410:
+ palette = VIDEO_PALETTE_YUV420;
+ break;
+ case V4L2_PIX_FMT_YUV420:
+ palette = VIDEO_PALETTE_YUV420;
+ break;
+ case V4L2_PIX_FMT_YUV411P:
+ palette = VIDEO_PALETTE_YUV411P;
+ break;
+ case V4L2_PIX_FMT_YUV422P:
+ palette = VIDEO_PALETTE_YUV422P;
+ break;
+ }
+ return palette;
+}
+
+/* ----------------------------------------------------------------- */
+
+static int poll_one(struct file *file)
+{
+ int retval = 1;
+ poll_table *table;
+ struct poll_wqueues pwq;
+
+ poll_initwait(&pwq);
+ table = &pwq.pt;
+ for (;;) {
+ int mask;
+ set_current_state(TASK_INTERRUPTIBLE);
+ mask = file->f_op->poll(file, table);
+ if (mask & POLLIN)
+ break;
+ table = NULL;
+ if (signal_pending(current)) {
+ retval = -ERESTARTSYS;
+ break;
+ }
+ schedule();
+ }
+ set_current_state(TASK_RUNNING);
+ poll_freewait(&pwq);
+ return retval;
+}
+
+static int count_inputs(struct inode *inode,
+ struct file *file,
+ v4l2_kioctl drv)
+{
+ struct v4l2_input input2;
+ int i;
+
+ for (i = 0;; i++) {
+ memset(&input2,0,sizeof(input2));
+ input2.index = i;
+ if (0 != drv(inode,file,VIDIOC_ENUMINPUT, &input2))
+ break;
+ }
+ return i;
+}
+
+static int check_size(struct inode *inode,
+ struct file *file,
+ v4l2_kioctl drv,
+ int *maxw, int *maxh)
+{
+ struct v4l2_fmtdesc desc2;
+ struct v4l2_format fmt2;
+
+ memset(&desc2,0,sizeof(desc2));
+ memset(&fmt2,0,sizeof(fmt2));
+
+ desc2.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ if (0 != drv(inode,file,VIDIOC_ENUM_FMT, &desc2))
+ goto done;
+
+ fmt2.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ fmt2.fmt.pix.width = 10000;
+ fmt2.fmt.pix.height = 10000;
+ fmt2.fmt.pix.pixelformat = desc2.pixelformat;
+ if (0 != drv(inode,file,VIDIOC_TRY_FMT, &fmt2))
+ goto done;
+
+ *maxw = fmt2.fmt.pix.width;
+ *maxh = fmt2.fmt.pix.height;
+
+ done:
+ return 0;
+}
+
+/* ----------------------------------------------------------------- */
+
+/*
+ * This function is exported.
+ */
+int
+v4l_compat_translate_ioctl(struct inode *inode,
+ struct file *file,
+ int cmd,
+ void *arg,
+ v4l2_kioctl drv)
+{
+ struct v4l2_capability *cap2 = NULL;
+ struct v4l2_format *fmt2 = NULL;
+ enum v4l2_buf_type captype = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+ struct v4l2_framebuffer fbuf2;
+ struct v4l2_input input2;
+ struct v4l2_tuner tun2;
+ struct v4l2_standard std2;
+ struct v4l2_frequency freq2;
+ struct v4l2_audio aud2;
+ struct v4l2_queryctrl qctrl2;
+ struct v4l2_buffer buf2;
+ v4l2_std_id sid;
+ int i, err = 0;
+
+ switch (cmd) {
+ case VIDIOCGCAP: /* capability */
+ {
+ struct video_capability *cap = arg;
+
+ cap2 = kmalloc(sizeof(*cap2),GFP_KERNEL);
+ memset(cap, 0, sizeof(*cap));
+ memset(cap2, 0, sizeof(*cap2));
+ memset(&fbuf2, 0, sizeof(fbuf2));
+
+ err = drv(inode, file, VIDIOC_QUERYCAP, cap2);
+ if (err < 0) {
+ dprintk("VIDIOCGCAP / VIDIOC_QUERYCAP: %d\n",err);
+ break;
+ }
+ if (cap2->capabilities & V4L2_CAP_VIDEO_OVERLAY) {
+ err = drv(inode, file, VIDIOC_G_FBUF, &fbuf2);
+ if (err < 0) {
+ dprintk("VIDIOCGCAP / VIDIOC_G_FBUF: %d\n",err);
+ memset(&fbuf2, 0, sizeof(fbuf2));
+ }
+ err = 0;
+ }
+
+ memcpy(cap->name, cap2->card,
+ min(sizeof(cap->name), sizeof(cap2->card)));
+ cap->name[sizeof(cap->name) - 1] = 0;
+ if (cap2->capabilities & V4L2_CAP_VIDEO_CAPTURE)
+ cap->type |= VID_TYPE_CAPTURE;
+ if (cap2->capabilities & V4L2_CAP_TUNER)
+ cap->type |= VID_TYPE_TUNER;
+ if (cap2->capabilities & V4L2_CAP_VBI_CAPTURE)
+ cap->type |= VID_TYPE_TELETEXT;
+ if (cap2->capabilities & V4L2_CAP_VIDEO_OVERLAY)
+ cap->type |= VID_TYPE_OVERLAY;
+ if (fbuf2.capability & V4L2_FBUF_CAP_LIST_CLIPPING)
+ cap->type |= VID_TYPE_CLIPPING;
+
+ cap->channels = count_inputs(inode,file,drv);
+ check_size(inode,file,drv,
+ &cap->maxwidth,&cap->maxheight);
+ cap->audios = 0; /* FIXME */
+ cap->minwidth = 48; /* FIXME */
+ cap->minheight = 32; /* FIXME */
+ break;
+ }
+ case VIDIOCGFBUF: /* get frame buffer */
+ {
+ struct video_buffer *buffer = arg;
+
+ err = drv(inode, file, VIDIOC_G_FBUF, &fbuf2);
+ if (err < 0) {
+ dprintk("VIDIOCGFBUF / VIDIOC_G_FBUF: %d\n",err);
+ break;
+ }
+ buffer->base = fbuf2.base;
+ buffer->height = fbuf2.fmt.height;
+ buffer->width = fbuf2.fmt.width;
+
+ switch (fbuf2.fmt.pixelformat) {
+ case V4L2_PIX_FMT_RGB332:
+ buffer->depth = 8;
+ break;
+ case V4L2_PIX_FMT_RGB555:
+ buffer->depth = 15;
+ break;
+ case V4L2_PIX_FMT_RGB565:
+ buffer->depth = 16;
+ break;
+ case V4L2_PIX_FMT_BGR24:
+ buffer->depth = 24;
+ break;
+ case V4L2_PIX_FMT_BGR32:
+ buffer->depth = 32;
+ break;
+ default:
+ buffer->depth = 0;
+ }
+ if (0 != fbuf2.fmt.bytesperline)
+ buffer->bytesperline = fbuf2.fmt.bytesperline;
+ else {
+ buffer->bytesperline =
+ (buffer->width * buffer->depth + 7) & 7;
+ buffer->bytesperline >>= 3;
+ }
+ break;
+ }
+ case VIDIOCSFBUF: /* set frame buffer */
+ {
+ struct video_buffer *buffer = arg;
+
+ memset(&fbuf2, 0, sizeof(fbuf2));
+ fbuf2.base = buffer->base;
+ fbuf2.fmt.height = buffer->height;
+ fbuf2.fmt.width = buffer->width;
+ switch (buffer->depth) {
+ case 8:
+ fbuf2.fmt.pixelformat = V4L2_PIX_FMT_RGB332;
+ break;
+ case 15:
+ fbuf2.fmt.pixelformat = V4L2_PIX_FMT_RGB555;
+ break;
+ case 16:
+ fbuf2.fmt.pixelformat = V4L2_PIX_FMT_RGB565;
+ break;
+ case 24:
+ fbuf2.fmt.pixelformat = V4L2_PIX_FMT_BGR24;
+ break;
+ case 32:
+ fbuf2.fmt.pixelformat = V4L2_PIX_FMT_BGR32;
+ break;
+ }
+ fbuf2.fmt.bytesperline = buffer->bytesperline;
+ err = drv(inode, file, VIDIOC_S_FBUF, &fbuf2);
+ if (err < 0)
+ dprintk("VIDIOCSFBUF / VIDIOC_S_FBUF: %d\n",err);
+ break;
+ }
+ case VIDIOCGWIN: /* get window or capture dimensions */
+ {
+ struct video_window *win = arg;
+
+ fmt2 = kmalloc(sizeof(*fmt2),GFP_KERNEL);
+ memset(win,0,sizeof(*win));
+ memset(fmt2,0,sizeof(*fmt2));
+
+ fmt2->type = V4L2_BUF_TYPE_VIDEO_OVERLAY;
+ err = drv(inode, file, VIDIOC_G_FMT, fmt2);
+ if (err < 0)
+ dprintk("VIDIOCGWIN / VIDIOC_G_WIN: %d\n",err);
+ if (err == 0) {
+ win->x = fmt2->fmt.win.w.left;
+ win->y = fmt2->fmt.win.w.top;
+ win->width = fmt2->fmt.win.w.width;
+ win->height = fmt2->fmt.win.w.height;
+ win->chromakey = fmt2->fmt.win.chromakey;
+ win->clips = NULL;
+ win->clipcount = 0;
+ break;
+ }
+
+ fmt2->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ err = drv(inode, file, VIDIOC_G_FMT, fmt2);
+ if (err < 0) {
+ dprintk("VIDIOCGWIN / VIDIOC_G_FMT: %d\n",err);
+ break;
+ }
+ win->x = 0;
+ win->y = 0;
+ win->width = fmt2->fmt.pix.width;
+ win->height = fmt2->fmt.pix.height;
+ win->chromakey = 0;
+ win->clips = NULL;
+ win->clipcount = 0;
+ break;
+ }
+ case VIDIOCSWIN: /* set window and/or capture dimensions */
+ {
+ struct video_window *win = arg;
+ int err1,err2;
+
+ fmt2 = kmalloc(sizeof(*fmt2),GFP_KERNEL);
+ memset(fmt2,0,sizeof(*fmt2));
+ fmt2->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ drv(inode, file, VIDIOC_STREAMOFF, &fmt2->type);
+ err1 = drv(inode, file, VIDIOC_G_FMT, fmt2);
+ if (err1 < 0)
+ dprintk("VIDIOCSWIN / VIDIOC_G_FMT: %d\n",err);
+ if (err1 == 0) {
+ fmt2->fmt.pix.width = win->width;
+ fmt2->fmt.pix.height = win->height;
+ fmt2->fmt.pix.field = V4L2_FIELD_ANY;
+ fmt2->fmt.pix.bytesperline = 0;
+ err = drv(inode, file, VIDIOC_S_FMT, fmt2);
+ if (err < 0)
+ dprintk("VIDIOCSWIN / VIDIOC_S_FMT #1: %d\n",
+ err);
+ win->width = fmt2->fmt.pix.width;
+ win->height = fmt2->fmt.pix.height;
+ }
+
+ memset(fmt2,0,sizeof(*fmt2));
+ fmt2->type = V4L2_BUF_TYPE_VIDEO_OVERLAY;
+ fmt2->fmt.win.w.left = win->x;
+ fmt2->fmt.win.w.top = win->y;
+ fmt2->fmt.win.w.width = win->width;
+ fmt2->fmt.win.w.height = win->height;
+ fmt2->fmt.win.chromakey = win->chromakey;
+ fmt2->fmt.win.clips = (void __user *)win->clips;
+ fmt2->fmt.win.clipcount = win->clipcount;
+ err2 = drv(inode, file, VIDIOC_S_FMT, fmt2);
+ if (err2 < 0)
+ dprintk("VIDIOCSWIN / VIDIOC_S_FMT #2: %d\n",err);
+
+ if (err1 != 0 && err2 != 0)
+ err = err1;
+ break;
+ }
+ case VIDIOCCAPTURE: /* turn on/off preview */
+ {
+ int *on = arg;
+
+ if (0 == *on) {
+ /* dirty hack time. But v4l1 has no STREAMOFF
+ * equivalent in the API, and this one at
+ * least comes close ... */
+ drv(inode, file, VIDIOC_STREAMOFF, &captype);
+ }
+ err = drv(inode, file, VIDIOC_OVERLAY, arg);
+ if (err < 0)
+ dprintk("VIDIOCCAPTURE / VIDIOC_PREVIEW: %d\n",err);
+ break;
+ }
+ case VIDIOCGCHAN: /* get input information */
+ {
+ struct video_channel *chan = arg;
+
+ memset(&input2,0,sizeof(input2));
+ input2.index = chan->channel;
+ err = drv(inode, file, VIDIOC_ENUMINPUT, &input2);
+ if (err < 0) {
+ dprintk("VIDIOCGCHAN / VIDIOC_ENUMINPUT: "
+ "channel=%d err=%d\n",chan->channel,err);
+ break;
+ }
+ chan->channel = input2.index;
+ memcpy(chan->name, input2.name,
+ min(sizeof(chan->name), sizeof(input2.name)));
+ chan->name[sizeof(chan->name) - 1] = 0;
+ chan->tuners = (input2.type == V4L2_INPUT_TYPE_TUNER) ? 1 : 0;
+ chan->flags = (chan->tuners) ? VIDEO_VC_TUNER : 0;
+ switch (input2.type) {
+ case V4L2_INPUT_TYPE_TUNER:
+ chan->type = VIDEO_TYPE_TV;
+ break;
+ default:
+ case V4L2_INPUT_TYPE_CAMERA:
+ chan->type = VIDEO_TYPE_CAMERA;
+ break;
+ }
+ chan->norm = 0;
+ err = drv(inode, file, VIDIOC_G_STD, &sid);
+ if (err < 0)
+ dprintk("VIDIOCGCHAN / VIDIOC_G_STD: %d\n",err);
+ if (err == 0) {
+ if (sid & V4L2_STD_PAL)
+ chan->norm = VIDEO_MODE_PAL;
+ if (sid & V4L2_STD_NTSC)
+ chan->norm = VIDEO_MODE_NTSC;
+ if (sid & V4L2_STD_SECAM)
+ chan->norm = VIDEO_MODE_SECAM;
+ }
+ break;
+ }
+ case VIDIOCSCHAN: /* set input */
+ {
+ struct video_channel *chan = arg;
+
+ sid = 0;
+ err = drv(inode, file, VIDIOC_S_INPUT, &chan->channel);
+ if (err < 0)
+ dprintk("VIDIOCSCHAN / VIDIOC_S_INPUT: %d\n",err);
+ switch (chan->norm) {
+ case VIDEO_MODE_PAL:
+ sid = V4L2_STD_PAL;
+ break;
+ case VIDEO_MODE_NTSC:
+ sid = V4L2_STD_NTSC;
+ break;
+ case VIDEO_MODE_SECAM:
+ sid = V4L2_STD_SECAM;
+ break;
+ }
+ if (0 != sid) {
+ err = drv(inode, file, VIDIOC_S_STD, &sid);
+ if (err < 0)
+ dprintk("VIDIOCSCHAN / VIDIOC_S_STD: %d\n",err);
+ }
+ break;
+ }
+ case VIDIOCGPICT: /* get tone controls & partial capture format */
+ {
+ struct video_picture *pict = arg;
+
+ pict->brightness = get_v4l_control(inode, file,
+ V4L2_CID_BRIGHTNESS,drv);
+ pict->hue = get_v4l_control(inode, file,
+ V4L2_CID_HUE, drv);
+ pict->contrast = get_v4l_control(inode, file,
+ V4L2_CID_CONTRAST, drv);
+ pict->colour = get_v4l_control(inode, file,
+ V4L2_CID_SATURATION, drv);
+ pict->whiteness = get_v4l_control(inode, file,
+ V4L2_CID_WHITENESS, drv);
+
+ fmt2 = kmalloc(sizeof(*fmt2),GFP_KERNEL);
+ memset(fmt2,0,sizeof(*fmt2));
+ fmt2->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ err = drv(inode, file, VIDIOC_G_FMT, fmt2);
+ if (err < 0) {
+ dprintk("VIDIOCGPICT / VIDIOC_G_FMT: %d\n",err);
+ break;
+ }
+#if 0 /* FIXME */
+ pict->depth = fmt2->fmt.pix.depth;
+#endif
+ pict->palette = pixelformat_to_palette(
+ fmt2->fmt.pix.pixelformat);
+ break;
+ }
+ case VIDIOCSPICT: /* set tone controls & partial capture format */
+ {
+ struct video_picture *pict = arg;
+
+ set_v4l_control(inode, file,
+ V4L2_CID_BRIGHTNESS, pict->brightness, drv);
+ set_v4l_control(inode, file,
+ V4L2_CID_HUE, pict->hue, drv);
+ set_v4l_control(inode, file,
+ V4L2_CID_CONTRAST, pict->contrast, drv);
+ set_v4l_control(inode, file,
+ V4L2_CID_SATURATION, pict->colour, drv);
+ set_v4l_control(inode, file,
+ V4L2_CID_WHITENESS, pict->whiteness, drv);
+
+ fmt2 = kmalloc(sizeof(*fmt2),GFP_KERNEL);
+ memset(fmt2,0,sizeof(*fmt2));
+ fmt2->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ err = drv(inode, file, VIDIOC_G_FMT, fmt2);
+ if (err < 0)
+ dprintk("VIDIOCSPICT / VIDIOC_G_FMT: %d\n",err);
+ if (fmt2->fmt.pix.pixelformat !=
+ palette_to_pixelformat(pict->palette)) {
+ fmt2->fmt.pix.pixelformat = palette_to_pixelformat(
+ pict->palette);
+ err = drv(inode, file, VIDIOC_S_FMT, fmt2);
+ if (err < 0)
+ dprintk("VIDIOCSPICT / VIDIOC_S_FMT: %d\n",err);
+ }
+
+ err = drv(inode, file, VIDIOC_G_FBUF, &fbuf2);
+ if (err < 0)
+ dprintk("VIDIOCSPICT / VIDIOC_G_FBUF: %d\n",err);
+ if (fbuf2.fmt.pixelformat !=
+ palette_to_pixelformat(pict->palette)) {
+ fbuf2.fmt.pixelformat = palette_to_pixelformat(
+ pict->palette);
+ err = drv(inode, file, VIDIOC_S_FBUF, &fbuf2);
+ if (err < 0)
+ dprintk("VIDIOCSPICT / VIDIOC_S_FBUF: %d\n",err);
+ err = 0; /* likely fails for non-root */
+ }
+ break;
+ }
+ case VIDIOCGTUNER: /* get tuner information */
+ {
+ struct video_tuner *tun = arg;
+
+ memset(&tun2,0,sizeof(tun2));
+ err = drv(inode, file, VIDIOC_G_TUNER, &tun2);
+ if (err < 0) {
+ dprintk("VIDIOCGTUNER / VIDIOC_G_TUNER: %d\n",err);
+ break;
+ }
+ memcpy(tun->name, tun2.name,
+ min(sizeof(tun->name), sizeof(tun2.name)));
+ tun->name[sizeof(tun->name) - 1] = 0;
+ tun->rangelow = tun2.rangelow;
+ tun->rangehigh = tun2.rangehigh;
+ tun->flags = 0;
+ tun->mode = VIDEO_MODE_AUTO;
+
+ for (i = 0; i < 64; i++) {
+ memset(&std2,0,sizeof(std2));
+ std2.index = i;
+ if (0 != drv(inode, file, VIDIOC_ENUMSTD, &std2))
+ break;
+ if (std2.id & V4L2_STD_PAL)
+ tun->flags |= VIDEO_TUNER_PAL;
+ if (std2.id & V4L2_STD_NTSC)
+ tun->flags |= VIDEO_TUNER_NTSC;
+ if (std2.id & V4L2_STD_SECAM)
+ tun->flags |= VIDEO_TUNER_SECAM;
+ }
+
+ err = drv(inode, file, VIDIOC_G_STD, &sid);
+ if (err < 0)
+ dprintk("VIDIOCGTUNER / VIDIOC_G_STD: %d\n",err);
+ if (err == 0) {
+ if (sid & V4L2_STD_PAL)
+ tun->mode = VIDEO_MODE_PAL;
+ if (sid & V4L2_STD_NTSC)
+ tun->mode = VIDEO_MODE_NTSC;
+ if (sid & V4L2_STD_SECAM)
+ tun->mode = VIDEO_MODE_SECAM;
+ }
+
+ if (tun2.capability & V4L2_TUNER_CAP_LOW)
+ tun->flags |= VIDEO_TUNER_LOW;
+ if (tun2.rxsubchans & V4L2_TUNER_SUB_STEREO)
+ tun->flags |= VIDEO_TUNER_STEREO_ON;
+ tun->signal = tun2.signal;
+ break;
+ }
+ case VIDIOCSTUNER: /* select a tuner input */
+ {
+#if 0 /* FIXME */
+ err = drv(inode, file, VIDIOC_S_INPUT, &i);
+ if (err < 0)
+ dprintk("VIDIOCSTUNER / VIDIOC_S_INPUT: %d\n",err);
+#else
+ err = 0;
+#endif
+ break;
+ }
+ case VIDIOCGFREQ: /* get frequency */
+ {
+ int *freq = arg;
+
+ freq2.tuner = 0;
+ err = drv(inode, file, VIDIOC_G_FREQUENCY, &freq2);
+ if (err < 0)
+ dprintk("VIDIOCGFREQ / VIDIOC_G_FREQUENCY: %d\n",err);
+ if (0 == err)
+ *freq = freq2.frequency;
+ break;
+ }
+ case VIDIOCSFREQ: /* set frequency */
+ {
+ int *freq = arg;
+
+ freq2.tuner = 0;
+ drv(inode, file, VIDIOC_G_FREQUENCY, &freq2);
+ freq2.frequency = *freq;
+ err = drv(inode, file, VIDIOC_S_FREQUENCY, &freq2);
+ if (err < 0)
+ dprintk("VIDIOCSFREQ / VIDIOC_S_FREQUENCY: %d\n",err);
+ break;
+ }
+ case VIDIOCGAUDIO: /* get audio properties/controls */
+ {
+ struct video_audio *aud = arg;
+
+ err = drv(inode, file, VIDIOC_G_AUDIO, &aud2);
+ if (err < 0) {
+ dprintk("VIDIOCGAUDIO / VIDIOC_G_AUDIO: %d\n",err);
+ break;
+ }
+ memcpy(aud->name, aud2.name,
+ min(sizeof(aud->name), sizeof(aud2.name)));
+ aud->name[sizeof(aud->name) - 1] = 0;
+ aud->audio = aud2.index;
+ aud->flags = 0;
+ i = get_v4l_control(inode, file, V4L2_CID_AUDIO_VOLUME, drv);
+ if (i >= 0) {
+ aud->volume = i;
+ aud->flags |= VIDEO_AUDIO_VOLUME;
+ }
+ i = get_v4l_control(inode, file, V4L2_CID_AUDIO_BASS, drv);
+ if (i >= 0) {
+ aud->bass = i;
+ aud->flags |= VIDEO_AUDIO_BASS;
+ }
+ i = get_v4l_control(inode, file, V4L2_CID_AUDIO_TREBLE, drv);
+ if (i >= 0) {
+ aud->treble = i;
+ aud->flags |= VIDEO_AUDIO_TREBLE;
+ }
+ i = get_v4l_control(inode, file, V4L2_CID_AUDIO_BALANCE, drv);
+ if (i >= 0) {
+ aud->balance = i;
+ aud->flags |= VIDEO_AUDIO_BALANCE;
+ }
+ i = get_v4l_control(inode, file, V4L2_CID_AUDIO_MUTE, drv);
+ if (i >= 0) {
+ if (i)
+ aud->flags |= VIDEO_AUDIO_MUTE;
+ aud->flags |= VIDEO_AUDIO_MUTABLE;
+ }
+ aud->step = 1;
+ qctrl2.id = V4L2_CID_AUDIO_VOLUME;
+ if (drv(inode, file, VIDIOC_QUERYCTRL, &qctrl2) == 0 &&
+ !(qctrl2.flags & V4L2_CTRL_FLAG_DISABLED))
+ aud->step = qctrl2.step;
+ aud->mode = 0;
+ err = drv(inode, file, VIDIOC_G_TUNER, &tun2);
+ if (err < 0) {
+ dprintk("VIDIOCGAUDIO / VIDIOC_G_TUNER: %d\n",err);
+ err = 0;
+ break;
+ }
+ if (tun2.rxsubchans & V4L2_TUNER_SUB_LANG2)
+ aud->mode = VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
+ else if (tun2.rxsubchans & V4L2_TUNER_SUB_STEREO)
+ aud->mode = VIDEO_SOUND_STEREO;
+ else if (tun2.rxsubchans & V4L2_TUNER_SUB_MONO)
+ aud->mode = VIDEO_SOUND_MONO;
+ break;
+ }
+ case VIDIOCSAUDIO: /* set audio controls */
+ {
+ struct video_audio *aud = arg;
+
+ memset(&aud2,0,sizeof(aud2));
+ memset(&tun2,0,sizeof(tun2));
+
+ aud2.index = aud->audio;
+ err = drv(inode, file, VIDIOC_S_AUDIO, &aud2);
+ if (err < 0) {
+ dprintk("VIDIOCSAUDIO / VIDIOC_S_AUDIO: %d\n",err);
+ break;
+ }
+
+ set_v4l_control(inode, file, V4L2_CID_AUDIO_VOLUME,
+ aud->volume, drv);
+ set_v4l_control(inode, file, V4L2_CID_AUDIO_BASS,
+ aud->bass, drv);
+ set_v4l_control(inode, file, V4L2_CID_AUDIO_TREBLE,
+ aud->treble, drv);
+ set_v4l_control(inode, file, V4L2_CID_AUDIO_BALANCE,
+ aud->balance, drv);
+ set_v4l_control(inode, file, V4L2_CID_AUDIO_MUTE,
+ !!(aud->flags & VIDEO_AUDIO_MUTE), drv);
+
+ err = drv(inode, file, VIDIOC_G_TUNER, &tun2);
+ if (err < 0)
+ dprintk("VIDIOCSAUDIO / VIDIOC_G_TUNER: %d\n",err);
+ if (err == 0) {
+ switch (aud->mode) {
+ default:
+ case VIDEO_SOUND_MONO:
+ case VIDEO_SOUND_LANG1:
+ tun2.audmode = V4L2_TUNER_MODE_MONO;
+ break;
+ case VIDEO_SOUND_STEREO:
+ tun2.audmode = V4L2_TUNER_MODE_STEREO;
+ break;
+ case VIDEO_SOUND_LANG2:
+ tun2.audmode = V4L2_TUNER_MODE_LANG2;
+ break;
+ }
+ err = drv(inode, file, VIDIOC_S_TUNER, &tun2);
+ if (err < 0)
+ dprintk("VIDIOCSAUDIO / VIDIOC_S_TUNER: %d\n",err);
+ }
+ err = 0;
+ break;
+ }
+#if 0
+ case VIDIOCGMBUF:
+ /* v4l2 drivers must implement that themself. The
+ mmap() differences can't be translated fully
+ transparent, thus there is no point to try that */
+#endif
+ case VIDIOCMCAPTURE: /* capture a frame */
+ {
+ struct video_mmap *mm = arg;
+
+ fmt2 = kmalloc(sizeof(*fmt2),GFP_KERNEL);
+ memset(&buf2,0,sizeof(buf2));
+ memset(fmt2,0,sizeof(*fmt2));
+
+ fmt2->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ err = drv(inode, file, VIDIOC_G_FMT, fmt2);
+ if (err < 0) {
+ dprintk("VIDIOCMCAPTURE / VIDIOC_G_FMT: %d\n",err);
+ break;
+ }
+ if (mm->width != fmt2->fmt.pix.width ||
+ mm->height != fmt2->fmt.pix.height ||
+ palette_to_pixelformat(mm->format) !=
+ fmt2->fmt.pix.pixelformat)
+ {/* New capture format... */
+ fmt2->fmt.pix.width = mm->width;
+ fmt2->fmt.pix.height = mm->height;
+ fmt2->fmt.pix.pixelformat =
+ palette_to_pixelformat(mm->format);
+ fmt2->fmt.pix.field = V4L2_FIELD_ANY;
+ fmt2->fmt.pix.bytesperline = 0;
+ err = drv(inode, file, VIDIOC_S_FMT, fmt2);
+ if (err < 0) {
+ dprintk("VIDIOCMCAPTURE / VIDIOC_S_FMT: %d\n",err);
+ break;
+ }
+ }
+ buf2.index = mm->frame;
+ buf2.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ err = drv(inode, file, VIDIOC_QUERYBUF, &buf2);
+ if (err < 0) {
+ dprintk("VIDIOCMCAPTURE / VIDIOC_QUERYBUF: %d\n",err);
+ break;
+ }
+ err = drv(inode, file, VIDIOC_QBUF, &buf2);
+ if (err < 0) {
+ dprintk("VIDIOCMCAPTURE / VIDIOC_QBUF: %d\n",err);
+ break;
+ }
+ err = drv(inode, file, VIDIOC_STREAMON, &captype);
+ if (err < 0)
+ dprintk("VIDIOCMCAPTURE / VIDIOC_STREAMON: %d\n",err);
+ break;
+ }
+ case VIDIOCSYNC: /* wait for a frame */
+ {
+ int *i = arg;
+
+ buf2.index = *i;
+ buf2.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ err = drv(inode, file, VIDIOC_QUERYBUF, &buf2);
+ if (err < 0) {
+ /* No such buffer */
+ dprintk("VIDIOCSYNC / VIDIOC_QUERYBUF: %d\n",err);
+ break;
+ }
+ if (!(buf2.flags & V4L2_BUF_FLAG_MAPPED)) {
+ /* Buffer is not mapped */
+ err = -EINVAL;
+ break;
+ }
+
+ /* make sure capture actually runs so we don't block forever */
+ err = drv(inode, file, VIDIOC_STREAMON, &captype);
+ if (err < 0) {
+ dprintk("VIDIOCSYNC / VIDIOC_STREAMON: %d\n",err);
+ break;
+ }
+
+ /* Loop as long as the buffer is queued, but not done */
+ while ((buf2.flags &
+ (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE))
+ == V4L2_BUF_FLAG_QUEUED)
+ {
+ err = poll_one(file);
+ if (err < 0 || /* error or sleep was interrupted */
+ err == 0) /* timeout? Shouldn't occur. */
+ break;
+ err = drv(inode, file, VIDIOC_QUERYBUF, &buf2);
+ if (err < 0)
+ dprintk("VIDIOCSYNC / VIDIOC_QUERYBUF: %d\n",err);
+ }
+ if (!(buf2.flags & V4L2_BUF_FLAG_DONE)) /* not done */
+ break;
+ do {
+ err = drv(inode, file, VIDIOC_DQBUF, &buf2);
+ if (err < 0)
+ dprintk("VIDIOCSYNC / VIDIOC_DQBUF: %d\n",err);
+ } while (err == 0 && buf2.index != *i);
+ break;
+ }
+
+ case VIDIOCGVBIFMT: /* query VBI data capture format */
+ {
+ struct vbi_format *fmt = arg;
+
+ fmt2 = kmalloc(sizeof(*fmt2),GFP_KERNEL);
+ memset(fmt2, 0, sizeof(*fmt2));
+ fmt2->type = V4L2_BUF_TYPE_VBI_CAPTURE;
+
+ err = drv(inode, file, VIDIOC_G_FMT, fmt2);
+ if (err < 0) {
+ dprintk("VIDIOCGVBIFMT / VIDIOC_G_FMT: %d\n", err);
+ break;
+ }
+ memset(fmt, 0, sizeof(*fmt));
+ fmt->samples_per_line = fmt2->fmt.vbi.samples_per_line;
+ fmt->sampling_rate = fmt2->fmt.vbi.sampling_rate;
+ fmt->sample_format = VIDEO_PALETTE_RAW;
+ fmt->start[0] = fmt2->fmt.vbi.start[0];
+ fmt->count[0] = fmt2->fmt.vbi.count[0];
+ fmt->start[1] = fmt2->fmt.vbi.start[1];
+ fmt->count[1] = fmt2->fmt.vbi.count[1];
+ fmt->flags = fmt2->fmt.vbi.flags & 0x03;
+ break;
+ }
+ case VIDIOCSVBIFMT:
+ {
+ struct vbi_format *fmt = arg;
+
+ fmt2 = kmalloc(sizeof(*fmt2),GFP_KERNEL);
+ memset(fmt2, 0, sizeof(*fmt2));
+
+ fmt2->type = V4L2_BUF_TYPE_VBI_CAPTURE;
+ fmt2->fmt.vbi.samples_per_line = fmt->samples_per_line;
+ fmt2->fmt.vbi.sampling_rate = fmt->sampling_rate;
+ fmt2->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
+ fmt2->fmt.vbi.start[0] = fmt->start[0];
+ fmt2->fmt.vbi.count[0] = fmt->count[0];
+ fmt2->fmt.vbi.start[1] = fmt->start[1];
+ fmt2->fmt.vbi.count[1] = fmt->count[1];
+ fmt2->fmt.vbi.flags = fmt->flags;
+ err = drv(inode, file, VIDIOC_TRY_FMT, fmt2);
+ if (err < 0) {
+ dprintk("VIDIOCSVBIFMT / VIDIOC_TRY_FMT: %d\n", err);
+ break;
+ }
+
+ if (fmt2->fmt.vbi.samples_per_line != fmt->samples_per_line ||
+ fmt2->fmt.vbi.sampling_rate != fmt->sampling_rate ||
+ VIDEO_PALETTE_RAW != fmt->sample_format ||
+ fmt2->fmt.vbi.start[0] != fmt->start[0] ||
+ fmt2->fmt.vbi.count[0] != fmt->count[0] ||
+ fmt2->fmt.vbi.start[1] != fmt->start[1] ||
+ fmt2->fmt.vbi.count[1] != fmt->count[1] ||
+ fmt2->fmt.vbi.flags != fmt->flags) {
+ err = -EINVAL;
+ break;
+ }
+ err = drv(inode, file, VIDIOC_S_FMT, fmt2);
+ if (err < 0)
+ dprintk("VIDIOCSVBIFMT / VIDIOC_S_FMT: %d\n", err);
+ break;
+ }
+
+ default:
+ err = -ENOIOCTLCMD;
+ break;
+ }
+
+ if (cap2)
+ kfree(cap2);
+ if (fmt2)
+ kfree(fmt2);
+ return err;
+}
+
+EXPORT_SYMBOL(v4l_compat_translate_ioctl);
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.