Some ioctl calls predestined for a media device have to be separately executed on each sub-device of a pipeline or redirected to the predefined one basing on the configuration data. This patch adds wrappers that adjust intercepted ioctl calls and execute them on every required sub-device.
Signed-off-by: Jacek Anaszewski <j.anaszew...@samsung.com> Acked-by: Kyungmin Park <kyungmin.p...@samsung.com> Cc: Mauro Carvalho Chehab <mche...@osg.samsung.com> Cc: Hans Verkuil <hans.verk...@cisco.com> --- lib/include/libv4l2-mdev-ioctl.h | 45 ++++++ lib/libv4l2/libv4l2-mdev-ioctl.c | 329 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 374 insertions(+) create mode 100644 lib/include/libv4l2-mdev-ioctl.h create mode 100644 lib/libv4l2/libv4l2-mdev-ioctl.c diff --git a/lib/include/libv4l2-mdev-ioctl.h b/lib/include/libv4l2-mdev-ioctl.h new file mode 100644 index 0000000..10326be --- /dev/null +++ b/lib/include/libv4l2-mdev-ioctl.h @@ -0,0 +1,45 @@ +/* + * Copyright (c) 2014 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * Author: Jacek Anaszewski <j.anaszew...@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation; either version 2.1 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + */ + +#ifndef __LIBV4L2_MDEV_IOCTL_H +#define __LIBV4L2_MDEV_IOCTL_H + +#include <linux/videodev2.h> +#include <libv4l2-mdev.h> + +int mdev_ioctl_set_fmt(struct media_device *mdev, + struct v4l2_format *fmt); + +int mdev_ioctl_ctrl(struct media_device *mdev, int request, + struct v4l2_control *arg); + +int mdev_ioctl_ext_ctrl(struct media_device *mdev, int request, + struct v4l2_ext_controls *arg); + +int mdev_ioctl_single_ext_ctrl(struct media_device *mdev, + int request, struct v4l2_ext_controls *arg); + +int mdev_ioctl_queryctrl(struct media_device *mdev, + struct v4l2_queryctrl *arg); + +int mdev_ioctl_query_ext_ctrl(struct media_device *mdev, + struct v4l2_query_ext_ctrl *arg); + +int mdev_ioctl_querymenu(struct media_device *mdev, + struct v4l2_querymenu *arg); + +#endif /* __LIBV4L2_MDEV_IOCTL_H */ diff --git a/lib/libv4l2/libv4l2-mdev-ioctl.c b/lib/libv4l2/libv4l2-mdev-ioctl.c new file mode 100644 index 0000000..0347f37 --- /dev/null +++ b/lib/libv4l2/libv4l2-mdev-ioctl.c @@ -0,0 +1,329 @@ +/* + * Copyright (c) 2014 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * Author: Jacek Anaszewski <j.anaszew...@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation; either version 2.1 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + */ + +#include <errno.h> +#include <linux/videodev2.h> +#include <sys/ioctl.h> + +#include <libv4l2-mdev-ioctl.h> + +int mdev_ioctl_set_fmt(struct media_device *mdev, + struct v4l2_format *fmt) +{ + struct v4l2_subdev_format sd_fmt = { 0 }; + struct media_entity *pipeline = mdev->pipeline; + int ret; + + while (pipeline) { + sd_fmt = pipeline->subdev_fmt; + sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; + ret = SYS_IOCTL(pipeline->fd, VIDIOC_SUBDEV_S_FMT, + &sd_fmt); + if (ret < 0) + return ret; + + pipeline = pipeline->next; + + /* Last entity in the pipeline is not a sub-device */ + if (pipeline->next == NULL) + break; + } + + ret = SYS_IOCTL(pipeline->fd, VIDIOC_S_FMT, fmt); + if (ret < 0) + return ret; + + return 0; +} + +int mdev_ioctl_ctrl(struct media_device *mdev, int request, + struct v4l2_control *arg) +{ + struct media_entity *pipeline = mdev->pipeline, *entity; + struct v4l2_control ctrl = *arg; + struct v4l2_queryctrl queryctrl; + int ret = -EINVAL; + + /* + * The control has to be reset to the default value + * on all of the pipeline entities, prior setting a new + * value. This is required in cases when the control config + * is changed between subsequent calls to VIDIOC_S_CTRL, + * to avoid the situation when a control is set on more + * than one sub-device. + */ + if (request == VIDIOC_S_CTRL) { + while (pipeline) { + queryctrl.id = ctrl.id; + + ret = SYS_IOCTL(pipeline->fd, VIDIOC_QUERYCTRL, + &queryctrl); + if (ret < 0) { + pipeline = pipeline->next; + continue; + } + + ctrl.value = queryctrl.default_value; + ret = SYS_IOCTL(pipeline->fd, VIDIOC_S_CTRL, &ctrl); + if (ret < 0) + return -EINVAL; + + pipeline = pipeline->next; + } + + ctrl.value = arg->value; + } + + entity = mdev_conf_get_entity_by_cid(mdev->config.controls, ctrl.id); + if (entity) { + ret = SYS_IOCTL(entity->fd, request, &ctrl); + V4L2_MDEV_DBG("Ioctl result for user control %x on %s: %d.", + ctrl.id, entity->name, ret); + goto exit; + } + + V4L2_MDEV_DBG("No config for control id %x.", ctrl.id); + + /* Walk the pipeline until the request succeeds */ + pipeline = mdev->pipeline; + + while (pipeline) { + ret = SYS_IOCTL(pipeline->fd, request, &ctrl); + if (!ret) { + V4L2_MDEV_DBG("Ioctl succeeded for user control %x on %s.", + ctrl.id, pipeline->name); + goto exit; + } + + pipeline = pipeline->next; + } + +exit: + *arg = ctrl; + return ret; +} + +int mdev_ioctl_single_ext_ctrl(struct media_device *mdev, + int request, struct v4l2_ext_controls *arg) +{ + struct media_entity *pipeline = mdev->pipeline, *entity; + struct v4l2_ext_controls ctrls = *arg; + struct v4l2_ext_control *ctrl; + struct v4l2_query_ext_ctrl queryctrl; + int ret = -EINVAL; + + ctrl = &ctrls.controls[0]; + + /* + * The control has to be reset to the default value + * on all of the pipeline entities, prior setting a new + * value. This is required in cases when the control config + * is changed between subsequent calls to VIDIOC_S_EXT_CTRLS, + * to avoid the situation when a control is set on more + * than one sub-device. + */ + if (request == VIDIOC_S_EXT_CTRLS) { + while (pipeline) { + queryctrl.id = ctrl->id; + + ret = SYS_IOCTL(pipeline->fd, VIDIOC_QUERY_EXT_CTRL, + &queryctrl); + if (ret < 0) { + pipeline = pipeline->next; + continue; + } + + ctrl->value64 = queryctrl.default_value; + + ret = SYS_IOCTL(pipeline->fd, VIDIOC_S_EXT_CTRLS, &ctrls); + if (ret < 0) + return -EINVAL; + + pipeline = pipeline->next; + } + + ctrl->value64 = arg->controls[0].value64; + } + + entity = mdev_conf_get_entity_by_cid(mdev->config.controls, ctrl->id); + if (entity) { + ret = SYS_IOCTL(entity->fd, request, &ctrls); + V4L2_MDEV_DBG("Ioctl result for extended control %x on %s: %d.", + ctrl->id, entity->name, ret); + goto exit; + } + + V4L2_MDEV_DBG("No config for control id %x.", ctrl->id); + + /* Walk the pipeline until the request succeeds */ + pipeline = mdev->pipeline; + + while (pipeline) { + ret = SYS_IOCTL(pipeline->fd, request, &ctrls); + if (!ret) { + V4L2_MDEV_DBG("Ioctl succeeded for extended control %x on %s.", + ctrl->id, pipeline->name); + goto exit; + } + + + pipeline = pipeline->next; + } + +exit: + *arg = ctrls; + return ret; +} + +int mdev_ioctl_ext_ctrl(struct media_device *mdev, int request, + struct v4l2_ext_controls *arg) +{ + struct v4l2_ext_controls out_ctrls = *arg, ctrls = *arg; + int ret = -EINVAL, i; + + ctrls.count = 1; + + /* + * Split cluster to individual ioctl calls for each control + * from the array, to make possible redirection of every + * single control to different sub-device, according to the + * configuration settings. + */ + for (i = 0; i < arg->count; ++i) { + ctrls.controls = &arg->controls[i]; + + ret = mdev_ioctl_single_ext_ctrl(mdev, request, &ctrls); + out_ctrls.controls[i] = ctrls.controls[i]; + if (ret < 0) { + if (ctrls.error_idx == 1) + out_ctrls.error_idx = ctrls.count; + else + out_ctrls.error_idx = i; + goto exit; + } + } + +exit: + *arg = out_ctrls; + return ret; +} + +int mdev_ioctl_queryctrl(struct media_device *mdev, + struct v4l2_queryctrl *arg) +{ + struct media_entity *pipeline = mdev->pipeline, *entity; + struct v4l2_queryctrl queryctrl = *arg; + int ret = -EINVAL; + + while (pipeline) { + ret = SYS_IOCTL(pipeline->fd, VIDIOC_QUERYCTRL, &queryctrl); + if (!ret) { + entity = mdev_conf_get_entity_by_cid(mdev->config.controls, + queryctrl.id); + /* + * If the control is in the config, then + * query the associated sub-device. + */ + if (entity) { + V4L2_MDEV_DBG("Control \"%s\" found in config.", queryctrl.name); + /* Check if the control hasn't been already queried */ + if (entity->fd != pipeline->fd) + ret = SYS_IOCTL(entity->fd, VIDIOC_QUERYCTRL, &queryctrl); + } + + V4L2_MDEV_DBG("Queryctrl ext control \"%s\" on %s (%d).", + queryctrl.name, entity ? entity->name : + pipeline->name, + ret); + break; + } + + pipeline = pipeline->next; + } + + *arg = queryctrl; + return ret; +} + +int mdev_ioctl_query_ext_ctrl(struct media_device *mdev, + struct v4l2_query_ext_ctrl *arg) +{ + struct media_entity *pipeline = mdev->pipeline, *entity; + struct v4l2_query_ext_ctrl query_ext_ctrl = *arg; + int ret = -EINVAL; + + while (pipeline) { + ret = SYS_IOCTL(pipeline->fd, VIDIOC_QUERY_EXT_CTRL, &query_ext_ctrl); + if (!ret) { + entity = mdev_conf_get_entity_by_cid(mdev->config.controls, + query_ext_ctrl.id); + /* + * If the control is in the config, then + * query the associated sub-device. + */ + if (entity) { + V4L2_MDEV_DBG("Control \"%s\" found in config.", query_ext_ctrl.name); + /* Check if the control hasn't been already queried */ + if (entity->fd != pipeline->fd) + ret = SYS_IOCTL(entity->fd, VIDIOC_QUERYCTRL, &query_ext_ctrl); + } + + V4L2_MDEV_DBG("Queryctrl ext control \"%s\" on %s (%d).", + query_ext_ctrl.name, entity ? + entity->name : + pipeline->name, + ret); + break; + } + + pipeline = pipeline->next; + } + + *arg = query_ext_ctrl; + return ret; +} + +int mdev_ioctl_querymenu(struct media_device *mdev, + struct v4l2_querymenu *arg) +{ + struct media_entity *pipeline = mdev->pipeline, *entity; + struct v4l2_querymenu querymenu = *arg; + int ret = -EINVAL; + + entity = mdev_conf_get_entity_by_cid(mdev->config.controls, querymenu.id); + if (entity) { + ret = SYS_IOCTL(entity->fd, VIDIOC_QUERYMENU, &querymenu); + V4L2_MDEV_DBG("Querymenu result for the control %x on %s: %d.", + querymenu.id, entity->name, ret); + goto exit; + } + + while (pipeline) { + ret = SYS_IOCTL(pipeline->fd, VIDIOC_QUERYMENU, &querymenu); + if (!ret) { + V4L2_MDEV_DBG("Querymenu succeeded for the control %x on %s.", + querymenu.id, pipeline->name); + goto exit; + } + + pipeline = pipeline->next; + } + +exit: + *arg = querymenu; + return ret; +} -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
