[patch] v4l: #2 - v4l1-compat update

Gerd Knorr
2003-05-12T16:43:17Z

Hi,

This patch updates the v4l1-compat module. Changes:
* use f_op->poll() instead of do_select()
* reduce stack usage of the v4l1_translate_ioctl() function.
* misc minor fixes here and there.

Please apply,

Gerd

diff -u linux-2.5.69/drivers/media/video/v4l1-compat.c linux/drivers/media/video/v4l1-compat.c
--- linux-2.5.69/drivers/media/video/v4l1-compat.c 2003-05-08 13:31:03.000000000 +0200
+++ linux/drivers/media/video/v4l1-compat.c 2003-05-08 13:55:11.000000000 +0200
@@ -127,6 +127,8 @@
return 0;
}

+/* ----------------------------------------------------------------- */
+
static int palette2pixelformat[] = {
[VIDEO_PALETTE_GREY] = V4L2_PIX_FMT_GREY,
[VIDEO_PALETTE_RGB555] = V4L2_PIX_FMT_RGB555,
@@ -145,16 +147,16 @@
[VIDEO_PALETTE_YUV422P] = V4L2_PIX_FMT_YUV422P,
};

-static int
-palette_to_pixelformat(int palette)
+static unsigned int
+palette_to_pixelformat(unsigned int palette)
{
- if (palette < sizeof(palette2pixelformat)/sizeof(int))
+ if (palette < ARRAY_SIZE(palette2pixelformat))
return palette2pixelformat[palette];
else
return 0;
}

-static int
+static unsigned int
pixelformat_to_palette(int pixelformat)
{
int palette = 0;
@@ -199,66 +201,43 @@
return palette;
}

-/* Do an 'in' (wait for input) select on a single file descriptor */
-/* This stuff plaigarized from linux/fs/select.c */
-#define __FD_IN(fds, n) (fds->in + n)
-#define BIT(i) (1UL << ((i)&(__NFDBITS-1)))
-#define SET(i,m) (*(m) |= (i))
-extern int do_select(int n, fd_set_bits *fds, long *timeout);
-
+/* ----------------------------------------------------------------- */

-static int
-simple_select(struct file *file)
+static int poll_one(struct file *file)
{
- fd_set_bits fds;
- char *bits;
- long timeout;
- int i, fd, n, ret, size;
-
- for (i = 0; i < current->files->max_fds; ++i)
- if (file == current->files->fd[i])
- break;
- if (i == current->files->max_fds)
- return -EINVAL;
- fd = i;
- n = fd + 1;
-
- timeout = MAX_SCHEDULE_TIMEOUT;
- /*
- * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
- * since we used fdset we need to allocate memory in units of
- * long-words.
- */
- ret = -ENOMEM;
- size = FDS_BYTES(n);
- bits = kmalloc(6 * size, GFP_KERNEL);
- if (!bits)
- goto out_nofds;
- fds.in = (unsigned long *) bits;
- fds.out = (unsigned long *) (bits + size);
- fds.ex = (unsigned long *) (bits + 2*size);
- fds.res_in = (unsigned long *) (bits + 3*size);
- fds.res_out = (unsigned long *) (bits + 4*size);
- fds.res_ex = (unsigned long *) (bits + 5*size);
-
- /* All zero except our one file descriptor bit, for input */
- memset(bits, 0, 6 * size);
- SET(BIT(fd), __FD_IN((&fds), fd / __NFDBITS));
-
- ret = do_select(n, &fds, &timeout);
-
- if (ret < 0)
- goto out;
- if (!ret) {
- ret = -ERESTARTNOHAND;
- if (signal_pending(current))
- goto out;
- ret = 0;
- }
-out:
- kfree(bits);
-out_nofds:
- return ret;
+ int retval = 1;
+ poll_table *table;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,48)
+ poll_table wait_table;
+
+ poll_initwait(&wait_table);
+ table = &wait_table;
+#else
+ struct poll_wqueues pwq;
+
+ poll_initwait(&pwq);
+ table = &pwq.pt;
+#endif
+ 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();
+ }
+ current->state = TASK_RUNNING;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,48)
+ poll_freewait(&wait_table);
+#else
+ poll_freewait(&pwq);
+#endif
+ return retval;
}

static int count_inputs(struct inode *inode,
@@ -306,6 +285,7 @@
return 0;
}

+/* ----------------------------------------------------------------- */

/*
* This function is exported.
@@ -317,26 +297,36 @@
void *arg,
v4l2_kioctl drv)
{
- int err = -ENOIOCTLCMD;
+ struct v4l2_capability *cap2 = NULL;
+ struct v4l2_format *fmt2 = NULL;

- switch (cmd)
- {
+ 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;
- struct v4l2_capability cap2;
- struct v4l2_framebuffer fbuf2;
-
+
+ cap2 = kmalloc(sizeof(*cap2),GFP_KERNEL);
memset(cap, 0, sizeof(*cap));
- memset(&cap2, 0, sizeof(cap2));
+ memset(cap2, 0, sizeof(*cap2));
memset(&fbuf2, 0, sizeof(fbuf2));

- err = drv(inode, file, VIDIOC_QUERYCAP, &cap2);
+ 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) {
+ 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);
@@ -345,16 +335,16 @@
err = 0;
}

- memcpy(cap->name, cap2.card,
- min(sizeof(cap->name), sizeof(cap2.card)));
+ 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)
+ if (cap2->capabilities & V4L2_CAP_VIDEO_CAPTURE)
cap->type |= VID_TYPE_CAPTURE;
- if (cap2.capabilities & V4L2_CAP_TUNER)
+ if (cap2->capabilities & V4L2_CAP_TUNER)
cap->type |= VID_TYPE_TUNER;
- if (cap2.capabilities & V4L2_CAP_VBI_CAPTURE)
+ if (cap2->capabilities & V4L2_CAP_VBI_CAPTURE)
cap->type |= VID_TYPE_TELETEXT;
- if (cap2.capabilities & V4L2_CAP_VIDEO_OVERLAY)
+ 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;
@@ -370,7 +360,6 @@
case VIDIOCGFBUF: /* get frame buffer */
{
struct video_buffer *buffer = arg;
- struct v4l2_framebuffer fbuf2;

err = drv(inode, file, VIDIOC_G_FBUF, &fbuf2);
if (err < 0) {
@@ -412,7 +401,6 @@
case VIDIOCSFBUF: /* set frame buffer */
{
struct video_buffer *buffer = arg;
- struct v4l2_framebuffer fbuf2;

memset(&fbuf2, 0, sizeof(fbuf2));
fbuf2.base = buffer->base;
@@ -444,36 +432,36 @@
case VIDIOCGWIN: /* get window or capture dimensions */
{
struct video_window *win = arg;
- struct v4l2_format fmt2;

+ fmt2 = kmalloc(sizeof(*fmt2),GFP_KERNEL);
memset(win,0,sizeof(*win));
- memset(&fmt2,0,sizeof(fmt2));
+ memset(fmt2,0,sizeof(*fmt2));

- fmt2.type = V4L2_BUF_TYPE_VIDEO_OVERLAY;
- err = drv(inode, file, VIDIOC_G_FMT, &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->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);
+ 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->width = fmt2->fmt.pix.width;
+ win->height = fmt2->fmt.pix.height;
win->chromakey = 0;
win->clips = NULL;
win->clipcount = 0;
@@ -482,37 +470,41 @@
case VIDIOCSWIN: /* set window and/or capture dimensions */
{
struct video_window *win = arg;
- struct v4l2_format fmt2;
+ int err1,err2;

- memset(&fmt2,0,sizeof(fmt2));
- fmt2.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- err = drv(inode, file, VIDIOC_G_FMT, &fmt2);
- if (err < 0)
+ fmt2 = kmalloc(sizeof(*fmt2),GFP_KERNEL);
+ memset(fmt2,0,sizeof(*fmt2));
+ fmt2->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ err1 = drv(inode, file, VIDIOC_G_FMT, fmt2);
+ if (err1 < 0)
dprintk("VIDIOCSWIN / VIDIOC_G_FMT: %d\n",err);
- if (err == 0) {
- fmt2.fmt.pix.width = win->width;
- fmt2.fmt.pix.height = win->height;
- fmt2.fmt.pix.field = V4L2_FIELD_ANY;
- err = drv(inode, file, VIDIOC_S_FMT, &fmt2);
+ if (err1 == 0) {
+ fmt2->fmt.pix.width = win->width;
+ fmt2->fmt.pix.height = win->height;
+ fmt2->fmt.pix.field = V4L2_FIELD_ANY;
+ 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;
+ 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 *)win->clips;
- fmt2.fmt.win.clipcount = win->clipcount;
- err = drv(inode, file, VIDIOC_S_FMT, &fmt2);
- if (err < 0)
+ 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 *)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 */
@@ -525,8 +517,6 @@
case VIDIOCGCHAN: /* get input information */
{
struct video_channel *chan = arg;
- struct v4l2_input input2;
- v4l2_std_id sid;

memset(&input2,0,sizeof(input2));
input2.index = chan->channel;
@@ -568,16 +558,32 @@
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;
- struct v4l2_format fmt2;

pict->brightness = get_v4l_control(inode, file,
V4L2_CID_BRIGHTNESS,drv);
@@ -590,25 +596,24 @@
pict->whiteness = get_v4l_control(inode, file,
V4L2_CID_WHITENESS, drv);

- memset(&fmt2,0,sizeof(fmt2));
- fmt2.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- err = drv(inode, file, VIDIOC_G_FMT, &fmt2);
+ 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;
+ pict->depth = fmt2->fmt.pix.depth;
#endif
pict->palette = pixelformat_to_palette(
- fmt2.fmt.pix.pixelformat);
+ fmt2->fmt.pix.pixelformat);
break;
}
case VIDIOCSPICT: /* set tone controls & partial capture format */
{
struct video_picture *pict = arg;
- struct v4l2_format fmt2;
- struct v4l2_framebuffer fbuf2;

set_v4l_control(inode, file,
V4L2_CID_BRIGHTNESS, pict->brightness, drv);
@@ -621,16 +626,17 @@
set_v4l_control(inode, file,
V4L2_CID_WHITENESS, pict->whiteness, drv);

- memset(&fmt2,0,sizeof(fmt2));
- fmt2.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- err = drv(inode, file, VIDIOC_G_FMT, &fmt2);
+ 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 !=
+ if (fmt2->fmt.pix.pixelformat !=
palette_to_pixelformat(pict->palette)) {
- fmt2.fmt.pix.pixelformat = palette_to_pixelformat(
+ fmt2->fmt.pix.pixelformat = palette_to_pixelformat(
pict->palette);
- err = drv(inode, file, VIDIOC_S_FMT, &fmt2);
+ err = drv(inode, file, VIDIOC_S_FMT, fmt2);
if (err < 0)
dprintk("VIDIOCSPICT / VIDIOC_S_FMT: %d\n",err);
}
@@ -652,8 +658,6 @@
case VIDIOCGTUNER: /* get tuner information */
{
struct video_tuner *tun = arg;
- struct v4l2_tuner tun2;
- v4l2_std_id sid;

memset(&tun2,0,sizeof(tun2));
err = drv(inode, file, VIDIOC_G_TUNER, &tun2);
@@ -669,6 +673,19 @@
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);
@@ -688,21 +705,20 @@
tun->signal = tun2.signal;
break;
}
-#if 0 /* FIXME */
case VIDIOCSTUNER: /* select a tuner input */
{
- int i;
-
+#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;
}
-#endif
case VIDIOCGFREQ: /* get frequency */
{
int *freq = arg;
- struct v4l2_frequency freq2;

err = drv(inode, file, VIDIOC_G_FREQUENCY, &freq2);
if (err < 0)
@@ -714,7 +730,6 @@
case VIDIOCSFREQ: /* set frequency */
{
int *freq = arg;
- struct v4l2_frequency freq2;

drv(inode, file, VIDIOC_G_FREQUENCY, &freq2);
freq2.frequency = *freq;
@@ -726,10 +741,6 @@
case VIDIOCGAUDIO: /* get audio properties/controls */
{
struct video_audio *aud = arg;
- struct v4l2_audio aud2;
- struct v4l2_queryctrl qctrl2;
- struct v4l2_tuner tun2;
- int v;

err = drv(inode, file, VIDIOC_G_AUDIO, &aud2);
if (err < 0) {
@@ -741,34 +752,29 @@
aud->name[sizeof(aud->name) - 1] = 0;
aud->audio = aud2.index;
aud->flags = 0;
- v = get_v4l_control(inode, file, V4L2_CID_AUDIO_VOLUME, drv);
- if (v >= 0)
- {
- aud->volume = v;
+ i = get_v4l_control(inode, file, V4L2_CID_AUDIO_VOLUME, drv);
+ if (i >= 0) {
+ aud->volume = i;
aud->flags |= VIDEO_AUDIO_VOLUME;
}
- v = get_v4l_control(inode, file, V4L2_CID_AUDIO_BASS, drv);
- if (v >= 0)
- {
- aud->bass = v;
+ i = get_v4l_control(inode, file, V4L2_CID_AUDIO_BASS, drv);
+ if (i >= 0) {
+ aud->bass = i;
aud->flags |= VIDEO_AUDIO_BASS;
}
- v = get_v4l_control(inode, file, V4L2_CID_AUDIO_TREBLE, drv);
- if (v >= 0)
- {
- aud->treble = v;
+ i = get_v4l_control(inode, file, V4L2_CID_AUDIO_TREBLE, drv);
+ if (i >= 0) {
+ aud->treble = i;
aud->flags |= VIDEO_AUDIO_TREBLE;
}
- v = get_v4l_control(inode, file, V4L2_CID_AUDIO_BALANCE, drv);
- if (v >= 0)
- {
- aud->balance = v;
+ i = get_v4l_control(inode, file, V4L2_CID_AUDIO_BALANCE, drv);
+ if (i >= 0) {
+ aud->balance = i;
aud->flags |= VIDEO_AUDIO_BALANCE;
}
- v = get_v4l_control(inode, file, V4L2_CID_AUDIO_MUTE, drv);
- if (v >= 0)
- {
- if (v)
+ 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;
}
@@ -795,8 +801,6 @@
case VIDIOCSAUDIO: /* set audio controls */
{
struct video_audio *aud = arg;
- struct v4l2_audio aud2;
- struct v4l2_tuner tun2;

memset(&aud2,0,sizeof(aud2));
memset(&tun2,0,sizeof(tun2));
@@ -844,83 +848,36 @@
break;
}
#if 0
- case VIDIOCGMBUF: /* get mmap parameters */
- {
- struct video_mbuf *mbuf = arg;
- struct v4l2_requestbuffers reqbuf2;
- struct v4l2_buffer buf2;
- struct v4l2_format fmt2, fmt2o;
- struct v4l2_capability cap2;
- int i;
-
- /* Set the format to maximum dimensions */
- if ((err = drv(inode, file, VIDIOC_QUERYCAP, &cap2)) < 0)
- break;
- fmt2o.type = V4L2_BUF_TYPE_CAPTURE;
- if ((err = drv(inode, file, VIDIOC_G_FMT, &fmt2o)) < 0)
- break;
- fmt2 = fmt2o;
- fmt2.fmt.pix.width = cap2.maxwidth;
- fmt2.fmt.pix.height = cap2.maxheight;
- fmt2.fmt.pix.flags |= V4L2_FMT_FLAG_INTERLACED;
- if ((err = drv(inode, file, VIDIOC_S_FMT, &fmt2)) < 0)
- break;
- reqbuf2.count = 2; /* v4l always used two buffers */
- reqbuf2.type = V4L2_BUF_TYPE_CAPTURE | V4L2_BUF_REQ_CONTIG;
- err = drv(inode, file, VIDIOC_REQBUFS, &reqbuf2);
- if (err < 0 || reqbuf2.count < 2 || reqbuf2.type
- != (V4L2_BUF_TYPE_CAPTURE | V4L2_BUF_REQ_CONTIG))
- {/* Driver doesn't support v4l back-compatibility */
- fmt2o.fmt.pix.flags |= V4L2_FMT_FLAG_INTERLACED;
- drv(inode, file, VIDIOC_S_FMT, &fmt2o);
- reqbuf2.count = 1;
- reqbuf2.type = V4L2_BUF_TYPE_CAPTURE;
- err = drv(inode, file, VIDIOC_REQBUFS, &reqbuf2);
- if (err < 0)
- {
- err = -EINVAL;
- break;
- }
- printk(KERN_INFO"V4L2: Device \"%s\" doesn't support"
- " v4l memory mapping\n", vfl->name);
- }
- buf2.index = 0;
- buf2.type = V4L2_BUF_TYPE_CAPTURE;
- err = drv(inode, file, VIDIOC_QUERYBUF, &buf2);
- mbuf->size = buf2.length * reqbuf2.count;
- mbuf->frames = reqbuf2.count;
- memset(mbuf->offsets, 0, sizeof(mbuf->offsets));
- for (i = 0; i < mbuf->frames; ++i)
- mbuf->offsets[i] = i * buf2.length;
- break;
- }
+ 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;
- struct v4l2_buffer buf2;
- struct v4l2_format fmt2;

+ fmt2 = kmalloc(sizeof(*fmt2),GFP_KERNEL);
memset(&buf2,0,sizeof(buf2));
- memset(&fmt2,0,sizeof(fmt2));
+ memset(fmt2,0,sizeof(*fmt2));

- fmt2.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- err = drv(inode, file, VIDIOC_G_FMT, &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 ||
+ if (mm->width != fmt2->fmt.pix.width ||
+ mm->height != fmt2->fmt.pix.height ||
palette_to_pixelformat(mm->format) !=
- fmt2.fmt.pix.pixelformat)
+ fmt2->fmt.pix.pixelformat)
{/* New capture format... */
- fmt2.fmt.pix.width = mm->width;
- fmt2.fmt.pix.height = mm->height;
- fmt2.fmt.pix.pixelformat =
+ 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;
- err = drv(inode, file, VIDIOC_S_FMT, &fmt2);
+ fmt2->fmt.pix.field = V4L2_FIELD_ANY;
+ err = drv(inode, file, VIDIOC_S_FMT, fmt2);
if (err < 0) {
dprintk("VIDIOCMCAPTURE / VIDIOC_S_FMT: %d\n",err);
break;
@@ -946,7 +903,6 @@
case VIDIOCSYNC: /* wait for a frame */
{
int *i = arg;
- struct v4l2_buffer buf2;

buf2.index = *i;
buf2.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
@@ -967,7 +923,7 @@
(V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE))
== V4L2_BUF_FLAG_QUEUED)
{
- err = simple_select(file);
+ err = poll_one(file);
if (err < 0 || /* error or sleep was interrupted */
err == 0) /* timeout? Shouldn't occur. */
break;
@@ -984,20 +940,80 @@
} while (err == 0 && buf2.index != *i);
break;
}
- case VIDIOCGUNIT: /* get related device minors */
- /* No translation */
- break;
- case VIDIOCGCAPTURE: /* */
- /* No translation, yet... */
- printk(KERN_INFO"v4l1-compat: VIDIOCGCAPTURE not implemented."
- " Send patches to bdirks@pacbell.net :-)\n");
- break;
- case VIDIOCSCAPTURE: /* */
- /* No translation, yet... */
- printk(KERN_INFO"v4l1-compat: VIDIOCSCAPTURE not implemented."
- " Send patches to bdirks@pacbell.net :-)\n");
+
+ 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 ||
+ 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 = -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;
}

--
sigfault