int saa7146_stop_preview(struct saa7146_fh *fh) { struct saa7146_dev *dev = fh->dev; struct saa7146_vv *vv = dev->vv_data; DEB_EE(("dev:%p, fh:%p\n",dev,fh)); /* check if streaming capture is running */ if (IS_CAPTURE_ACTIVE(fh) != 0) { DEB_D(("streaming capture is active.\n")); return -EBUSY; } /* check if overlay is running at all */ if ((vv->video_status & STATUS_OVERLAY) == 0) { DEB_D(("no active overlay.\n")); return 0; } if (vv->video_fh != fh) { DEB_D(("overlay is active, but in another open.\n")); return -EBUSY; } vv->video_status = 0; vv->video_fh = NULL; saa7146_disable_overlay(fh); saa7146_res_free(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP); return 0; }
int saa7146_start_preview(struct saa7146_fh *fh) { struct saa7146_dev *dev = fh->dev; struct saa7146_vv *vv = dev->vv_data; struct v4l2_format fmt; int ret = 0, err = 0; DEB_EE("dev:%p, fh:%p\n", dev, fh); /* check if we have overlay information */ if (vv->ov.fh == NULL) { DEB_D("no overlay data available. try S_FMT first.\n"); return -EAGAIN; } /* check if streaming capture is running */ if (IS_CAPTURE_ACTIVE(fh) != 0) { DEB_D("streaming capture is active\n"); return -EBUSY; } /* check if overlay is running */ if (IS_OVERLAY_ACTIVE(fh) != 0) { if (vv->video_fh == fh) { DEB_D("overlay is already active\n"); return 0; } DEB_D("overlay is already active in another open\n"); return -EBUSY; } if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) { DEB_D("cannot get necessary overlay resources\n"); return -EBUSY; } fmt.fmt.win = vv->ov.win; err = vidioc_try_fmt_vid_overlay(NULL, fh, &fmt); if (0 != err) { saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP); return -EBUSY; } vv->ov.win = fmt.fmt.win; DEB_D("%dx%d+%d+%d %s field=%s\n", vv->ov.win.w.width, vv->ov.win.w.height, vv->ov.win.w.left, vv->ov.win.w.top, vv->ov_fmt->name, v4l2_field_names[vv->ov.win.field]); if (0 != (ret = saa7146_enable_overlay(fh))) { DEB_D("enabling overlay failed: %d\n", ret); saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP); return ret; } vv->video_status = STATUS_OVERLAY; vv->video_fh = fh; return 0; }
static int s_fmt(struct saa7146_fh *fh, struct v4l2_format *f) { struct saa7146_dev *dev = fh->dev; struct saa7146_vv *vv = dev->vv_data; int err; switch (f->type) { case V4L2_BUF_TYPE_VIDEO_CAPTURE: DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n",dev,fh)); if (IS_CAPTURE_ACTIVE(fh) != 0) { DEB_EE(("streaming capture is active\n")); return -EBUSY; } err = try_fmt(fh,f); if (0 != err) return err; fh->video_fmt = f->fmt.pix; DEB_EE(("set to pixelformat '%4.4s'\n",(char *)&fh->video_fmt.pixelformat)); return 0; case V4L2_BUF_TYPE_VIDEO_OVERLAY: DEB_EE(("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n",dev,fh)); err = try_win(dev,&f->fmt.win); if (0 != err) return err; down(&dev->lock); fh->ov.win = f->fmt.win; fh->ov.nclips = f->fmt.win.clipcount; if (fh->ov.nclips > 16) fh->ov.nclips = 16; if (copy_from_user(fh->ov.clips,f->fmt.win.clips,sizeof(struct v4l2_clip)*fh->ov.nclips)) { up(&dev->lock); return -EFAULT; } /* fh->ov.fh is used to indicate that we have valid overlay informations, too */ fh->ov.fh = fh; up(&dev->lock); /* check if our current overlay is active */ if (IS_OVERLAY_ACTIVE(fh) != 0) { saa7146_stop_preview(fh); saa7146_start_preview(fh); } return 0; default: DEB_D(("unknown format type '%d'\n",f->type)); return -EINVAL; } }
static void video_close(struct saa7146_dev *dev, struct file *file) { struct saa7146_fh *fh = file->private_data; struct saa7146_vv *vv = dev->vv_data; struct videobuf_queue *q = &fh->video_q; if (IS_CAPTURE_ACTIVE(fh) != 0) video_end(fh, file); else if (IS_OVERLAY_ACTIVE(fh) != 0) saa7146_stop_preview(fh); videobuf_stop(q); /* hmm, why is this function declared void? */ }
static void video_close(struct saa7146_dev *dev, struct file *file) { struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data; struct saa7146_vv *vv = dev->vv_data; int err; if (IS_CAPTURE_ACTIVE(fh) != 0) { err = video_end(fh, file); } else if (IS_OVERLAY_ACTIVE(fh) != 0) { err = saa7146_stop_preview(fh); } /* hmm, why is this function declared void? */ /* return err */ }
static int vidioc_s_fmt_vid_cap(struct file *file, void *__fh, struct v4l2_format *f) { struct saa7146_fh *fh = __fh; struct saa7146_dev *dev = fh->dev; struct saa7146_vv *vv = dev->vv_data; int err; DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh)); if (IS_CAPTURE_ACTIVE(fh) != 0) { DEB_EE(("streaming capture is active\n")); return -EBUSY; } err = vidioc_try_fmt_vid_cap(file, fh, f); if (0 != err) return err; fh->video_fmt = f->fmt.pix; DEB_EE(("set to pixelformat '%4.4s'\n", (char *)&fh->video_fmt.pixelformat)); return 0; }
static void video_close(struct saa7146_dev *dev, struct file *file) { struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data; struct saa7146_vv *vv = dev->vv_data; struct videobuf_queue *q = &fh->video_q; int err; if (IS_CAPTURE_ACTIVE(fh) != 0) { err = video_end(fh, file); } else if (IS_OVERLAY_ACTIVE(fh) != 0) { err = saa7146_stop_preview(fh); } // release all capture buffers mutex_lock(&q->lock); videobuf_read_stop(q); mutex_unlock(&q->lock); /* hmm, why is this function declared void? */ /* return err */ }
static int set_control(struct saa7146_fh *fh, struct v4l2_control *c) { struct saa7146_dev *dev = fh->dev; struct saa7146_vv *vv = dev->vv_data; const struct v4l2_queryctrl* ctrl; ctrl = ctrl_by_id(c->id); if (NULL == ctrl) { DEB_D(("unknown control %d\n",c->id)); return -EINVAL; } down(&dev->lock); switch (ctrl->type) { case V4L2_CTRL_TYPE_BOOLEAN: case V4L2_CTRL_TYPE_MENU: case V4L2_CTRL_TYPE_INTEGER: if (c->value < ctrl->minimum) c->value = ctrl->minimum; if (c->value > ctrl->maximum) c->value = ctrl->maximum; break; default: /* nothing */; }; switch (c->id) { case V4L2_CID_BRIGHTNESS: { u32 value = saa7146_read(dev, BCS_CTRL); value &= 0x00ffffff; value |= (c->value << 24); saa7146_write(dev, BCS_CTRL, value); saa7146_write(dev, MC2, MASK_22 | MASK_06 ); break; } case V4L2_CID_CONTRAST: { u32 value = saa7146_read(dev, BCS_CTRL); value &= 0xff00ffff; value |= (c->value << 16); saa7146_write(dev, BCS_CTRL, value); saa7146_write(dev, MC2, MASK_22 | MASK_06 ); break; } case V4L2_CID_SATURATION: { u32 value = saa7146_read(dev, BCS_CTRL); value &= 0xffffff00; value |= (c->value << 0); saa7146_write(dev, BCS_CTRL, value); saa7146_write(dev, MC2, MASK_22 | MASK_06 ); break; } case V4L2_CID_HFLIP: /* fixme: we can support changing VFLIP and HFLIP here... */ if (IS_CAPTURE_ACTIVE(fh) != 0) { DEB_D(("V4L2_CID_HFLIP while active capture.\n")); up(&dev->lock); return -EINVAL; } vv->hflip = c->value; break; case V4L2_CID_VFLIP: if (IS_CAPTURE_ACTIVE(fh) != 0) { DEB_D(("V4L2_CID_VFLIP while active capture.\n")); up(&dev->lock); return -EINVAL; } vv->vflip = c->value; break; default: { return -EINVAL; } } up(&dev->lock); if (IS_OVERLAY_ACTIVE(fh) != 0) { saa7146_stop_preview(fh); saa7146_start_preview(fh); } return 0; }