Ioctls executed on complex media devices need special handling. For instance some ioctls need to be targeted for specific sub-devices, depending on the media device configuration. The APIs being introduced address such requirements.
Signed-off-by: Jacek Anaszewski <j.anaszew...@samsung.com> Acked-by: Kyungmin Park <kyungmin.p...@samsung.com> --- utils/media-ctl/Makefile.am | 2 +- utils/media-ctl/libv4l2media_ioctl.c | 369 ++++++++++++++++++++++++++++++++++ utils/media-ctl/libv4l2media_ioctl.h | 40 ++++ 3 files changed, 410 insertions(+), 1 deletion(-) create mode 100644 utils/media-ctl/libv4l2media_ioctl.c create mode 100644 utils/media-ctl/libv4l2media_ioctl.h diff --git a/utils/media-ctl/Makefile.am b/utils/media-ctl/Makefile.am index 3e883e0..7f18624 100644 --- a/utils/media-ctl/Makefile.am +++ b/utils/media-ctl/Makefile.am @@ -1,6 +1,6 @@ noinst_LTLIBRARIES = libmediactl.la libv4l2subdev.la libmediatext.la -libmediactl_la_SOURCES = libmediactl.c mediactl-priv.h +libmediactl_la_SOURCES = libmediactl.c mediactl-priv.h libv4l2media_ioctl.c libv4l2media_ioctl.h libmediactl_la_CFLAGS = -static $(LIBUDEV_CFLAGS) libmediactl_la_LDFLAGS = -static $(LIBUDEV_LIBS) diff --git a/utils/media-ctl/libv4l2media_ioctl.c b/utils/media-ctl/libv4l2media_ioctl.c new file mode 100644 index 0000000..c324f01 --- /dev/null +++ b/utils/media-ctl/libv4l2media_ioctl.c @@ -0,0 +1,369 @@ +/* + * Copyright (c) 2015 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 <unistd.h> +#include <linux/videodev2.h> +#include <sys/syscall.h> + +#include "libv4l2media_ioctl.h" +#include "mediactl-priv.h" +#include "mediactl.h" +#include "v4l2subdev.h" + +#define VIDIOC_CTRL(type) \ + ((type) == VIDIOC_S_CTRL ? "VIDIOC_S_CTRL" : \ + "VIDIOC_G_CTRL") + +#define VIDIOC_EXT_CTRL(type) \ + ((type) == VIDIOC_S_EXT_CTRLS ? \ + "VIDIOC_S_EXT_CTRLS" : \ + ((type) == VIDIOC_G_EXT_CTRLS ? \ + "VIDIOC_G_EXT_CTRLS" : \ + "VIDIOC_TRY_EXT_CTRLS")) + +#define SYS_IOCTL(fd, cmd, arg) \ + syscall(SYS_ioctl, (int)(fd), (unsigned long)(cmd), (void *)(arg)) + + +int media_ioctl_ctrl(struct media_device *media, int request, + struct v4l2_control *arg) +{ + struct media_entity *entity = media->pipeline; + struct v4l2_control ctrl = *arg; + struct v4l2_queryctrl queryctrl; + bool ctrl_found = 0; + int ret; + + /* + * 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 (entity) { + queryctrl.id = ctrl.id; + + ret = SYS_IOCTL(entity->sd->fd, VIDIOC_QUERYCTRL, + &queryctrl); + if (ret < 0) { + entity = entity->next; + continue; + } + + ctrl_found = true; + + if (queryctrl.type & V4L2_CTRL_TYPE_BUTTON) + break; + + ctrl.value = queryctrl.default_value; + ret = SYS_IOCTL(entity->sd->fd, VIDIOC_S_CTRL, &ctrl); + if (ret < 0) + return -EINVAL; + + entity = entity->next; + } + + ctrl.value = arg->value; + } + + if (!ctrl_found) { + ret = -EINVAL; + goto exit; + } + + entity = v4l2_subdev_get_pipeline_entity_by_cid(media, ctrl.id); + if (entity) { + ret = SYS_IOCTL(entity->sd->fd, request, &ctrl); + goto exit; + } + + /* Walk the pipeline until the request succeeds */ + entity = media->pipeline; + + ret = -ENOENT; + + while (entity) { + ret = SYS_IOCTL(entity->sd->fd, request, &ctrl); + if (!ret) + goto exit; + + entity = entity->next; + } + +exit: + *arg = ctrl; + + media_dbg(media, "%s [id: 0x%8.8x, entity: %s] (%d)\n", + VIDIOC_CTRL(request), ctrl.id, + entity ? entity->info.name : NULL, ret); + + return ret; +} + +static int media_ioctl_single_ext_ctrl(struct media_device *media, + int request, struct v4l2_ext_controls *arg) +{ + struct media_entity *entity = media->pipeline; + struct v4l2_ext_controls ctrls = *arg; + struct v4l2_ext_control *ctrl; + struct v4l2_query_ext_ctrl queryctrl; + bool ctrl_found = 0; + 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 (entity) { + queryctrl.id = ctrl->id; + + ret = SYS_IOCTL(entity->sd->fd, VIDIOC_QUERY_EXT_CTRL, + &queryctrl); + if (ret < 0) { + entity = entity->next; + continue; + } + + ctrl_found = true; + + if (queryctrl.type & V4L2_CTRL_TYPE_BUTTON) + break; + + ctrl->value64 = queryctrl.default_value; + + ret = SYS_IOCTL(entity->sd->fd, VIDIOC_S_EXT_CTRLS, + &ctrls); + if (ret < 0) + return -EINVAL; + + entity = entity->next; + } + + ctrl->value64 = arg->controls[0].value64; + } + + if (!ctrl_found) { + ret = -EINVAL; + goto exit; + } + + entity = v4l2_subdev_get_pipeline_entity_by_cid(media, ctrl->id); + if (entity) { + ret = SYS_IOCTL(entity->sd->fd, request, &ctrls); + goto exit; + } + + /* Walk the pipeline until the request succeeds */ + entity = media->pipeline; + + while (entity) { + ret = SYS_IOCTL(entity->sd->fd, request, &ctrls); + if (!ret) + goto exit; + + entity = entity->next; + } + +exit: + *arg = ctrls; + + media_dbg(media, "%s [id: 0x%8.8x, entity: %s] (%d)\n", + VIDIOC_EXT_CTRL(request), ctrl->id, + entity ? entity->info.name : NULL, ret); + + return ret; +} + +int media_ioctl_ext_ctrl(struct media_device *media, 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 = media_ioctl_single_ext_ctrl(media, 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 media_ioctl_queryctrl(struct media_device *media, + struct v4l2_queryctrl *arg) +{ + struct media_entity *entity = media->pipeline, *target_entity; + struct v4l2_queryctrl queryctrl = *arg; + int ret = -EINVAL; + + while (entity) { + ret = SYS_IOCTL(entity->sd->fd, VIDIOC_QUERYCTRL, &queryctrl); + if (!ret) { + /* + * Control id might be or'ed with V4L2_CTRL_FLAG_NEXT_CTRL, + * therefore the check for the config settings must be + * done no sooner than after first successful ioctl execution + * on a pipeline sub-device. + */ + target_entity = + v4l2_subdev_get_pipeline_entity_by_cid(media, + queryctrl.id); + /* + * If the control is in the config, then + * query the associated sub-device. + */ + if (target_entity) { + /* + * It might happen that pipeline head is the + * target entity for the control - in such a + * case preclude requering it. + */ + if (target_entity != entity) + ret = SYS_IOCTL(target_entity->sd->fd, + VIDIOC_QUERYCTRL, + &queryctrl); + entity = target_entity; + } + + break; + } + + entity = entity->next; + } + + *arg = queryctrl; + + media_dbg(media, + "VIDIOC_QUERYCTRL [id: 0x%8.8x, entity: %s] (%d)\n", + queryctrl.id, entity ? entity->info.name : NULL, ret); + + return ret; +} + +int media_ioctl_query_ext_ctrl(struct media_device *media, + struct v4l2_query_ext_ctrl *arg) +{ + struct media_entity *entity = media->pipeline, *target_entity; + struct v4l2_query_ext_ctrl query_ext_ctrl = *arg; + int ret = -EINVAL; + + while (entity) { + ret = SYS_IOCTL(entity->sd->fd, VIDIOC_QUERY_EXT_CTRL, + &query_ext_ctrl); + if (!ret) { + /* + * Passed query_ext_ctrl.id id might be or'ed with + * V4L2_CTRL_FLAG_NEXT_CTRL, therefore the check for + * existence of the related configuration must be + * done no sooner than after first successful ioctl + * execution on a pipeline sub-device. + */ + target_entity = + v4l2_subdev_get_pipeline_entity_by_cid(media, + query_ext_ctrl.id); + /* + * If the control is in the config, then + * query the associated sub-device. + */ + if (target_entity) { + /* + * It might happen that pipeline head is the + * target entity for the control - in such a + * case preclude requering it. + */ + if (target_entity != entity) + ret = SYS_IOCTL(target_entity->sd->fd, + VIDIOC_QUERY_EXT_CTRL, + &query_ext_ctrl); + entity = target_entity; + } + + break; + } + + entity = entity->next; + } + + *arg = query_ext_ctrl; + + media_dbg(media, + "VIDIOC_QUERY_EXT_CTRL [id: 0x%8.8x, entity: %s] (%d)\n", + query_ext_ctrl.id, entity ? entity->info.name : NULL, ret); + + return ret; +} + +int media_ioctl_querymenu(struct media_device *media, + struct v4l2_querymenu *arg) +{ + struct media_entity *entity = media->pipeline; + struct v4l2_querymenu querymenu = *arg; + int ret = -EINVAL; + + entity = v4l2_subdev_get_pipeline_entity_by_cid(media, querymenu.id); + if (entity) { + ret = SYS_IOCTL(entity->sd->fd, VIDIOC_QUERYMENU, &querymenu); + goto exit; + } + + entity = media->pipeline; + + while (entity) { + ret = SYS_IOCTL(entity->sd->fd, VIDIOC_QUERYMENU, &querymenu); + if (!ret) + goto exit; + + entity = entity->next; + } + +exit: + *arg = querymenu; + + media_dbg(media, "VIDIOC_QUERYMENU [id: 0x%8.8x, entity: %s] (%d)\n", + querymenu.id, entity ? entity->info.name : NULL, ret); + + return ret; +} diff --git a/utils/media-ctl/libv4l2media_ioctl.h b/utils/media-ctl/libv4l2media_ioctl.h new file mode 100644 index 0000000..2841c09 --- /dev/null +++ b/utils/media-ctl/libv4l2media_ioctl.h @@ -0,0 +1,40 @@ +/* + * Copyright (c) 2015 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 __LIBV4L2MEDIA_IOCTL_H +#define __LIBV4L2MEDIA_IOCTL_H + +#include <linux/videodev2.h> + +struct media_device; + +int media_ioctl_ctrl(struct media_device *media, int request, + struct v4l2_control *arg); + +int media_ioctl_ext_ctrl(struct media_device *media, int request, + struct v4l2_ext_controls *arg); + +int media_ioctl_queryctrl(struct media_device *media, + struct v4l2_queryctrl *arg); + +int media_ioctl_query_ext_ctrl(struct media_device *media, + struct v4l2_query_ext_ctrl *arg); + +int media_ioctl_querymenu(struct media_device *media, + struct v4l2_querymenu *arg); + +#endif /* __LIBV4L2MEDIA_IOCTL_H */ -- 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
