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V4L/DVB (8845): s2255drv: adds JPEG compression quality control 

adds VIDIOC_S_JPEGCOMP and VIDIOC_G_JPEGCOMP ioctls for
controlling JPEG compression quality.

Signed-off-by: Dean Anderson <dean@sensoray.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Dean Anderson 2008-08-29 15:33:19 -03:00 committed by Mauro Carvalho Chehab
parent abc94fc8fe
commit 22b88d48a0
1 changed files with 34 additions and 1 deletions
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35
drivers/media/video/s2255drv.c
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@ -58,6 +58,8 @@
/* default JPEG quality */
#define S2255_DEF_JPEG_QUAL 50
/* vendor request in */
#define S2255_VR_IN 0
/* vendor request out */
@ -242,6 +244,8 @@ struct s2255_dev {
struct s2255_pipeinfo pipes[MAX_PIPE_BUFFERS];
struct s2255_bufferi buffer[MAX_CHANNELS];
struct s2255_mode mode[MAX_CHANNELS];
/* jpeg compression */
struct v4l2_jpegcompression jc[MAX_CHANNELS];
const struct s2255_fmt *cur_fmt[MAX_CHANNELS];
int cur_frame[MAX_CHANNELS];
int last_frame[MAX_CHANNELS];
@ -1035,7 +1039,8 @@ static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
fh->mode.color = COLOR_Y8;
break;
case V4L2_PIX_FMT_JPEG:
fh->mode.color = COLOR_JPG | (50 << 8);
fh->mode.color = COLOR_JPG |
(fh->dev->jc[fh->channel].quality << 8);
break;
case V4L2_PIX_FMT_YUV422P:
fh->mode.color = COLOR_YUVPL;
@ -1208,6 +1213,10 @@ static int s2255_set_mode(struct s2255_dev *dev, unsigned long chn,
dev->mode[chn].scale);
dprintk(2, "mode contrast %x\n", mode->contrast);
/* if JPEG, set the quality */
if ((mode->color & MASK_COLOR) == COLOR_JPG)
mode->color = (dev->jc[chn].quality << 8) | COLOR_JPG;
/* save the mode */
dev->mode[chn] = *mode;
dev->req_image_size[chn] = get_transfer_size(mode);
@ -1472,6 +1481,27 @@ static int vidioc_s_ctrl(struct file *file, void *priv,
return -EINVAL;
}
static int vidioc_g_jpegcomp(struct file *file, void *priv,
struct v4l2_jpegcompression *jc)
{
struct s2255_fh *fh = priv;
struct s2255_dev *dev = fh->dev;
*jc = dev->jc[fh->channel];
dprintk(2, "getting jpegcompression, quality %d\n", jc->quality);
return 0;
}
static int vidioc_s_jpegcomp(struct file *file, void *priv,
struct v4l2_jpegcompression *jc)
{
struct s2255_fh *fh = priv;
struct s2255_dev *dev = fh->dev;
if (jc->quality < 0 || jc->quality > 100)
return -EINVAL;
dev->jc[fh->channel].quality = jc->quality;
dprintk(2, "setting jpeg quality %d\n", jc->quality);
return 0;
}
static int s2255_open(struct inode *inode, struct file *file)
{
int minor = iminor(inode);
@ -1762,6 +1792,8 @@ static const struct v4l2_ioctl_ops s2255_ioctl_ops = {
#ifdef CONFIG_VIDEO_V4L1_COMPAT
.vidiocgmbuf = vidioc_cgmbuf,
#endif
.vidioc_s_jpegcomp = vidioc_s_jpegcomp,
.vidioc_g_jpegcomp = vidioc_g_jpegcomp,
};
static struct video_device template = {
@ -2148,6 +2180,7 @@ static int s2255_board_init(struct s2255_dev *dev)
for (j = 0; j < MAX_CHANNELS; j++) {
dev->b_acquire[j] = 0;
dev->mode[j] = mode_def;
dev->jc[j].quality = S2255_DEF_JPEG_QUAL;
dev->cur_fmt[j] = &formats[0];
dev->mode[j].restart = 1;
dev->req_image_size[j] = get_transfer_size(&mode_def);