From 6a33091f13d840a2ba020605180a3e591be5c2cd Mon Sep 17 00:00:00 2001 From: =?utf8?q?Jean-Fran=C3=A7ois=20Moine?= Date: Sat, 2 Oct 2010 04:12:25 -0300 Subject: [PATCH] [media] gspca - main: New video control mechanism MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The new control mechanism uses dynamic control values in the subdriver descriptor. It simplifies standard control handling. Signed-off-by: Jean-François Moine Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/gspca/gspca.c | 131 ++++++++++++++++++++++-------- drivers/media/video/gspca/gspca.h | 12 ++- 2 files changed, 110 insertions(+), 33 deletions(-) diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c index 90f058bda7da..68b58106e4c8 100644 --- a/drivers/media/video/gspca/gspca.c +++ b/drivers/media/video/gspca/gspca.c @@ -878,6 +878,7 @@ out: static void gspca_set_default_mode(struct gspca_dev *gspca_dev) { + struct gspca_ctrl *ctrl; int i; i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ @@ -885,6 +886,16 @@ static void gspca_set_default_mode(struct gspca_dev *gspca_dev) gspca_dev->width = gspca_dev->cam.cam_mode[i].width; gspca_dev->height = gspca_dev->cam.cam_mode[i].height; gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat; + + /* set the current control values to their default values + * which may have changed in sd_init() */ + ctrl = gspca_dev->cam.ctrls; + if (ctrl != NULL) { + for (i = 0; + i < gspca_dev->sd_desc->nctrls; + i++, ctrl++) + ctrl->val = ctrl->def; + } } static int wxh_to_mode(struct gspca_dev *gspca_dev, @@ -1308,7 +1319,7 @@ out: return ret; } -static const struct ctrl *get_ctrl(struct gspca_dev *gspca_dev, +static int get_ctrl(struct gspca_dev *gspca_dev, int id) { const struct ctrl *ctrls; @@ -1320,9 +1331,9 @@ static const struct ctrl *get_ctrl(struct gspca_dev *gspca_dev, if (gspca_dev->ctrl_dis & (1 << i)) continue; if (id == ctrls->qctrl.id) - return ctrls; + return i; } - return NULL; + return -1; } static int vidioc_queryctrl(struct file *file, void *priv, @@ -1330,34 +1341,40 @@ static int vidioc_queryctrl(struct file *file, void *priv, { struct gspca_dev *gspca_dev = priv; const struct ctrl *ctrls; - int i; + struct gspca_ctrl *gspca_ctrl; + int i, idx; u32 id; - ctrls = NULL; id = q_ctrl->id; if (id & V4L2_CTRL_FLAG_NEXT_CTRL) { id &= V4L2_CTRL_ID_MASK; id++; + idx = -1; for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { if (gspca_dev->ctrl_dis & (1 << i)) continue; if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id) continue; - if (ctrls && gspca_dev->sd_desc->ctrls[i].qctrl.id - > ctrls->qctrl.id) + if (idx >= 0 + && gspca_dev->sd_desc->ctrls[i].qctrl.id + > gspca_dev->sd_desc->ctrls[idx].qctrl.id) continue; - ctrls = &gspca_dev->sd_desc->ctrls[i]; + idx = i; } - if (ctrls == NULL) - return -EINVAL; } else { - ctrls = get_ctrl(gspca_dev, id); - if (ctrls == NULL) - return -EINVAL; - i = ctrls - gspca_dev->sd_desc->ctrls; + idx = get_ctrl(gspca_dev, id); } - memcpy(q_ctrl, ctrls, sizeof *q_ctrl); - if (gspca_dev->ctrl_inac & (1 << i)) + if (idx < 0) + return -EINVAL; + ctrls = &gspca_dev->sd_desc->ctrls[idx]; + memcpy(q_ctrl, &ctrls->qctrl, sizeof *q_ctrl); + if (gspca_dev->cam.ctrls != NULL) { + gspca_ctrl = &gspca_dev->cam.ctrls[idx]; + q_ctrl->default_value = gspca_ctrl->def; + q_ctrl->minimum = gspca_ctrl->min; + q_ctrl->maximum = gspca_ctrl->max; + } + if (gspca_dev->ctrl_inac & (1 << idx)) q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE; return 0; } @@ -1367,23 +1384,46 @@ static int vidioc_s_ctrl(struct file *file, void *priv, { struct gspca_dev *gspca_dev = priv; const struct ctrl *ctrls; - int ret; + struct gspca_ctrl *gspca_ctrl; + int idx, ret; - ctrls = get_ctrl(gspca_dev, ctrl->id); - if (ctrls == NULL) + idx = get_ctrl(gspca_dev, ctrl->id); + if (idx < 0) return -EINVAL; - - if (ctrl->value < ctrls->qctrl.minimum - || ctrl->value > ctrls->qctrl.maximum) - return -ERANGE; + if (gspca_dev->ctrl_inac & (1 << idx)) + return -EINVAL; + ctrls = &gspca_dev->sd_desc->ctrls[idx]; + if (gspca_dev->cam.ctrls != NULL) { + gspca_ctrl = &gspca_dev->cam.ctrls[idx]; + if (ctrl->value < gspca_ctrl->min + || ctrl->value > gspca_ctrl->max) + return -ERANGE; + } else { + gspca_ctrl = NULL; + if (ctrl->value < ctrls->qctrl.minimum + || ctrl->value > ctrls->qctrl.maximum) + return -ERANGE; + } PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value); if (mutex_lock_interruptible(&gspca_dev->usb_lock)) return -ERESTARTSYS; + if (!gspca_dev->present) { + ret = -ENODEV; + goto out; + } gspca_dev->usb_err = 0; - if (gspca_dev->present) + if (ctrls->set != NULL) { ret = ctrls->set(gspca_dev, ctrl->value); - else - ret = -ENODEV; + goto out; + } + if (gspca_ctrl != NULL) { + gspca_ctrl->val = ctrl->value; + if (ctrls->set_control != NULL + && gspca_dev->streaming) + ctrls->set_control(gspca_dev); + } + ret = gspca_dev->usb_err; +out: mutex_unlock(&gspca_dev->usb_lock); return ret; } @@ -1393,19 +1433,28 @@ static int vidioc_g_ctrl(struct file *file, void *priv, { struct gspca_dev *gspca_dev = priv; const struct ctrl *ctrls; - int ret; + int idx, ret; - ctrls = get_ctrl(gspca_dev, ctrl->id); - if (ctrls == NULL) + idx = get_ctrl(gspca_dev, ctrl->id); + if (idx < 0) return -EINVAL; + ctrls = &gspca_dev->sd_desc->ctrls[idx]; if (mutex_lock_interruptible(&gspca_dev->usb_lock)) return -ERESTARTSYS; + if (!gspca_dev->present) { + ret = -ENODEV; + goto out; + } gspca_dev->usb_err = 0; - if (gspca_dev->present) + if (ctrls->get != NULL) { ret = ctrls->get(gspca_dev, &ctrl->value); - else - ret = -ENODEV; + goto out; + } + if (gspca_dev->cam.ctrls != NULL) + ctrl->value = gspca_dev->cam.ctrls[idx].val; + ret = 0; +out: mutex_unlock(&gspca_dev->usb_lock); return ret; } @@ -2125,6 +2174,22 @@ static struct video_device gspca_template = { .release = gspca_release, }; +/* initialize the controls */ +static void ctrls_init(struct gspca_dev *gspca_dev) +{ + struct gspca_ctrl *ctrl; + int i; + + for (i = 0, ctrl = gspca_dev->cam.ctrls; + i < gspca_dev->sd_desc->nctrls; + i++, ctrl++) { + ctrl->def = gspca_dev->sd_desc->ctrls[i].qctrl.default_value; + ctrl->val = ctrl->def; + ctrl->min = gspca_dev->sd_desc->ctrls[i].qctrl.minimum; + ctrl->max = gspca_dev->sd_desc->ctrls[i].qctrl.maximum; + } +} + /* * probe and create a new gspca device * @@ -2186,6 +2251,8 @@ int gspca_dev_probe2(struct usb_interface *intf, ret = sd_desc->config(gspca_dev, id); if (ret < 0) goto out; + if (gspca_dev->cam.ctrls != NULL) + ctrls_init(gspca_dev); ret = sd_desc->init(gspca_dev); if (ret < 0) goto out; diff --git a/drivers/media/video/gspca/gspca.h b/drivers/media/video/gspca/gspca.h index b749c36d9f7e..d4d210b56b49 100644 --- a/drivers/media/video/gspca/gspca.h +++ b/drivers/media/video/gspca/gspca.h @@ -52,11 +52,20 @@ struct framerates { int nrates; }; +/* control definition */ +struct gspca_ctrl { + s16 val; /* current value */ + s16 def; /* default value */ + s16 min, max; /* minimum and maximum values */ +}; + /* device information - set at probe time */ struct cam { const struct v4l2_pix_format *cam_mode; /* size nmodes */ const struct framerates *mode_framerates; /* must have size nmode, * just like cam_mode */ + struct gspca_ctrl *ctrls; /* control table - size nctrls */ + /* may be NULL */ u32 bulk_size; /* buffer size when image transfer by bulk */ u32 input_flags; /* value for ENUM_INPUT status flags */ u8 nmodes; /* size of cam_mode */ @@ -99,6 +108,7 @@ struct ctrl { struct v4l2_queryctrl qctrl; int (*set)(struct gspca_dev *, __s32); int (*get)(struct gspca_dev *, __s32 *); + cam_v_op set_control; }; /* subdriver description */ @@ -106,7 +116,7 @@ struct sd_desc { /* information */ const char *name; /* sub-driver name */ /* controls */ - const struct ctrl *ctrls; + const struct ctrl *ctrls; /* static control definition */ int nctrls; /* mandatory operations */ cam_cf_op config; /* called on probe */ -- 2.34.1