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V4L/DVB (12325): Implement changing resolution on the fly for zr364xx driver 

This patch implements changing resolution in zr364xx_vidioc_s_fmt_vid_cap for
zr364xx driver. This version is synced with v4l-dvb as of 20/Jul/2009. Tested
with Creative PC-CAM 880.

OBS: I had to increase MAX_FRAME_SIZE to prevent a hard crash in my notebook
(caps lock blinking) when testing with mplayer, which automatically sets
resolution to the maximum (640x480). Maybe we should add code to auto-detect
frame size to prevent this kind of crash in the future.

Signed-off-by: Lamarque V. Souza <lamarque@gmail.com>
Signed-off-by: Antoine Jacquet <royale@zerezo.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Lamarque Vieira Souza 2009-07-20 20:46:42 -03:00 committed by Mauro Carvalho Chehab
parent 6ace40effd
commit 8c5f32ac2f
1 changed files with 55 additions and 10 deletions
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65
drivers/media/video/zr364xx.c
View File

@ -43,14 +43,14 @@
/* Version Information */
#define DRIVER_VERSION "v0.73"
#define ZR364_VERSION_CODE KERNEL_VERSION(0, 7, 3)
#define ZR364XX_VERSION_CODE KERNEL_VERSION(0, 7, 3)
#define DRIVER_AUTHOR "Antoine Jacquet, http://royale.zerezo.com/"
#define DRIVER_DESC "Zoran 364xx"
/* Camera */
#define FRAMES 1
#define MAX_FRAME_SIZE 100000
#define MAX_FRAME_SIZE 200000
#define BUFFER_SIZE 0x1000
#define CTRL_TIMEOUT 500
@ -734,7 +734,7 @@ static int zr364xx_vidioc_querycap(struct file *file, void *priv,
strlcpy(cap->card, cam->udev->product, sizeof(cap->card));
strlcpy(cap->bus_info, dev_name(&cam->udev->dev),
sizeof(cap->bus_info));
cap->version = ZR364_VERSION_CODE;
cap->version = ZR364XX_VERSION_CODE;
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
V4L2_CAP_READWRITE |
V4L2_CAP_STREAMING;
@ -874,9 +874,14 @@ static int zr364xx_vidioc_try_fmt_vid_cap(struct file *file, void *priv,
return -EINVAL;
}
if (!(f->fmt.pix.width == 160 && f->fmt.pix.height == 120) &&
!(f->fmt.pix.width == 640 && f->fmt.pix.height == 480)) {
f->fmt.pix.width = 320;
f->fmt.pix.height = 240;
}
f->fmt.pix.field = V4L2_FIELD_NONE;
f->fmt.pix.width = cam->width;
f->fmt.pix.height = cam->height;
f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
f->fmt.pix.colorspace = 0;
@ -907,7 +912,6 @@ static int zr364xx_vidioc_g_fmt_vid_cap(struct file *file, void *priv,
return 0;
}
/* Lamarque TODO: implement changing resolution on the fly */
static int zr364xx_vidioc_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
@ -915,6 +919,7 @@ static int zr364xx_vidioc_s_fmt_vid_cap(struct file *file, void *priv,
struct videobuf_queue *q = &cam->vb_vidq;
char pixelformat_name[5];
int ret = zr364xx_vidioc_try_fmt_vid_cap(file, cam, f);
int i;
if (ret < 0)
return ret;
@ -927,15 +932,55 @@ static int zr364xx_vidioc_s_fmt_vid_cap(struct file *file, void *priv,
goto out;
}
f->fmt.pix.field = V4L2_FIELD_NONE;
f->fmt.pix.width = cam->width;
f->fmt.pix.height = cam->height;
if (res_check(cam)) {
DBG("%s can't change format after started\n", __func__);
ret = -EBUSY;
goto out;
}
cam->width = f->fmt.pix.width;
cam->height = f->fmt.pix.height;
dev_info(&cam->udev->dev, "%s: %dx%d mode selected\n", __func__,
cam->width, cam->height);
f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
f->fmt.pix.colorspace = 0;
f->fmt.pix.priv = 0;
cam->vb_vidq.field = f->fmt.pix.field;
cam->mode.color = V4L2_PIX_FMT_JPEG;
if (f->fmt.pix.width == 160 && f->fmt.pix.height == 120)
mode = 1;
else if (f->fmt.pix.width == 640 && f->fmt.pix.height == 480)
mode = 2;
else
mode = 0;
m0d1[0] = mode;
m1[2].value = 0xf000 + mode;
m2[1].value = 0xf000 + mode;
header2[437] = cam->height / 256;
header2[438] = cam->height % 256;
header2[439] = cam->width / 256;
header2[440] = cam->width % 256;
for (i = 0; init[cam->method][i].size != -1; i++) {
ret =
send_control_msg(cam->udev, 1, init[cam->method][i].value,
0, init[cam->method][i].bytes,
init[cam->method][i].size);
if (ret < 0) {
dev_err(&cam->udev->dev,
"error during resolution change sequence: %d\n", i);
goto out;
}
}
/* Added some delay here, since opening/closing the camera quickly,
* like Ekiga does during its startup, can crash the webcam
*/
mdelay(100);
cam->skip = 2;
ret = 0;
out:
@ -1123,6 +1168,7 @@ static int zr364xx_start_acquire(struct zr364xx_camera *cam)
cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;
cam->buffer.frame[j].cur_size = 0;
}
cam->b_acquire = 1;
return 0;
}
@ -1165,7 +1211,6 @@ static int zr364xx_vidioc_streamon(struct file *file, void *priv,
res = videobuf_streamon(&cam->vb_vidq);
if (res == 0) {
zr364xx_start_acquire(cam);
cam->b_acquire = 1;
} else {
res_free(cam);
}