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| author | Hans Verkuil <hans.verkuil@cisco.com> | 2012-05-02 08:33:52 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-05-14 20:03:12 +0200 |
| commit | 7088f4df4c489811f6a5ad9a883b7dd259adfb6a (patch) | |
| tree | bdada78cf74b8653720806e5a66b95c158f7b83a /drivers/media/video/vivi.c | |
| parent | [media] vivi: add more pixelformats (diff) | |
| download | linux-7088f4df4c489811f6a5ad9a883b7dd259adfb6a.tar.xz linux-7088f4df4c489811f6a5ad9a883b7dd259adfb6a.zip | |
[media] vivi: add the alpha component control
Useful to set the alpha component for the pixel formats with an alpha channel.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/vivi.c')
| -rw-r--r-- | drivers/media/video/vivi.c | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/drivers/media/video/vivi.c b/drivers/media/video/vivi.c index 5e457452a6e1..0960d7f0d394 100644 --- a/drivers/media/video/vivi.c +++ b/drivers/media/video/vivi.c @@ -200,6 +200,7 @@ struct vivi_dev { struct v4l2_ctrl *gain; }; struct v4l2_ctrl *volume; + struct v4l2_ctrl *alpha; struct v4l2_ctrl *button; struct v4l2_ctrl *boolean; struct v4l2_ctrl *int32; @@ -237,6 +238,7 @@ struct vivi_dev { u8 bars[9][3]; u8 line[MAX_WIDTH * 8]; unsigned int pixelsize; + u8 alpha_component; }; /* ------------------------------------------------------------------ @@ -359,6 +361,7 @@ static void precalculate_bars(struct vivi_dev *dev) static void gen_twopix(struct vivi_dev *dev, u8 *buf, int colorpos, bool odd) { u8 r_y, g_u, b_v; + u8 alpha = dev->alpha_component; int color; u8 *p; @@ -436,14 +439,14 @@ static void gen_twopix(struct vivi_dev *dev, u8 *buf, int colorpos, bool odd) *p = (g_u << 5) | b_v; break; case 1: - *p = (r_y << 2) | (g_u >> 3); + *p = (alpha & 0x80) | (r_y << 2) | (g_u >> 3); break; } break; case V4L2_PIX_FMT_RGB555X: switch (color) { case 0: - *p = (r_y << 2) | (g_u >> 3); + *p = (alpha & 0x80) | (r_y << 2) | (g_u >> 3); break; case 1: *p = (g_u << 5) | b_v; @@ -479,7 +482,7 @@ static void gen_twopix(struct vivi_dev *dev, u8 *buf, int colorpos, bool odd) case V4L2_PIX_FMT_RGB32: switch (color) { case 0: - *p = 0; + *p = alpha; break; case 1: *p = r_y; @@ -504,7 +507,7 @@ static void gen_twopix(struct vivi_dev *dev, u8 *buf, int colorpos, bool odd) *p = r_y; break; case 3: - *p = 0; + *p = alpha; break; } break; @@ -595,8 +598,9 @@ static void vivi_fillbuff(struct vivi_dev *dev, struct vivi_buffer *buf) dev->saturation->cur.val, dev->hue->cur.val); gen_text(dev, vbuf, line++ * 16, 16, str); - snprintf(str, sizeof(str), " autogain %d, gain %3d, volume %3d ", - dev->autogain->cur.val, gain, dev->volume->cur.val); + snprintf(str, sizeof(str), " autogain %d, gain %3d, volume %3d, alpha 0x%02x ", + dev->autogain->cur.val, gain, dev->volume->cur.val, + dev->alpha->cur.val); gen_text(dev, vbuf, line++ * 16, 16, str); snprintf(str, sizeof(str), " int32 %d, int64 %lld, bitmask %08x ", dev->int32->cur.val, @@ -1125,8 +1129,15 @@ static int vivi_s_ctrl(struct v4l2_ctrl *ctrl) { struct vivi_dev *dev = container_of(ctrl->handler, struct vivi_dev, ctrl_handler); - if (ctrl == dev->button) - dev->button_pressed = 30; + switch (ctrl->id) { + case V4L2_CID_ALPHA_COMPONENT: + dev->alpha_component = ctrl->val; + break; + default: + if (ctrl == dev->button) + dev->button_pressed = 30; + break; + } return 0; } @@ -1387,6 +1398,8 @@ static int __init vivi_create_instance(int inst) V4L2_CID_AUTOGAIN, 0, 1, 1, 1); dev->gain = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops, V4L2_CID_GAIN, 0, 255, 1, 100); + dev->alpha = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops, + V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 0); dev->button = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_button, NULL); dev->int32 = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_int32, NULL); dev->int64 = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_int64, NULL); |