diff options
| author | Dean Anderson <dean@sensoray.com> | 2008-08-29 15:33:19 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-10-12 09:36:55 -0200 |
| commit | 22b88d48a08e334d36218ca166749c4e6d644f0c (patch) | |
| tree | f57b3571d6ea16676ee306a7ba9a2a7f2da9140b /drivers/media | |
| parent | abc94fc8feb1488079dd7dd46bd61d37d91c5658 (diff) | |
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>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/video/s2255drv.c | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/drivers/media/video/s2255drv.c b/drivers/media/video/s2255drv.c index ea40f4c8b33..b8e10455220 100644 --- a/drivers/media/video/s2255drv.c +++ b/drivers/media/video/s2255drv.c @@ -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); |