From febcb53ca85d911619456c09c4be49fd73c4964b Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Sat, 30 Jul 2011 14:33:37 +0200 Subject: omap3-isp-live: Initial commit Signed-off-by: Laurent Pinchart --- isp/subdev.c | 287 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 287 insertions(+) create mode 100644 isp/subdev.c (limited to 'isp/subdev.c') diff --git a/isp/subdev.c b/isp/subdev.c new file mode 100644 index 0000000..b4894a2 --- /dev/null +++ b/isp/subdev.c @@ -0,0 +1,287 @@ +/* + * OMAP3 ISP library - V4L2 sub-devices + * + * Copyright (C) 2010-2011 Ideas on board SPRL + * + * Contact: Laurent Pinchart + * + * This library 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 library 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 General Public License for + * more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include + +#include +#include +#include +#include +#include + +#include + +#include "media.h" +#include "subdev.h" +#include "tools.h" + +static struct { + const char *name; + enum v4l2_mbus_pixelcode code; +} mbus_formats[] = { + { "YUYV", V4L2_MBUS_FMT_YUYV8_1X16 }, + { "UYVY", V4L2_MBUS_FMT_UYVY8_1X16 }, + { "SGRBG10", V4L2_MBUS_FMT_SGRBG10_1X10 }, + { "SGRBG10_DPCM8", V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8 }, +}; + +static const char *pixelcode_to_string(enum v4l2_mbus_pixelcode code) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(mbus_formats); ++i) { + if (mbus_formats[i].code == code) + return mbus_formats[i].name; + } + + return "unknown"; +} + +int v4l2_subdev_open(struct media_entity *entity) +{ + if (entity->fd != -1) + return 0; + + entity->fd = open(entity->devname, O_RDWR); + if (entity->fd == -1) { + printf("%s: Failed to open subdev device node %s\n", __func__, + entity->devname); + return -errno; + } + + return 0; +} + +void v4l2_subdev_close(struct media_entity *entity) +{ + close(entity->fd); +} + +int v4l2_subdev_get_format(struct media_entity *entity, + struct v4l2_mbus_framefmt *format, unsigned int pad, + enum v4l2_subdev_format_whence which) +{ + struct v4l2_subdev_format fmt; + int ret; + + ret = v4l2_subdev_open(entity); + if (ret < 0) + return ret; + + memset(&fmt, 0, sizeof(fmt)); + fmt.pad = pad; + fmt.which = which; + + ret = ioctl(entity->fd, VIDIOC_SUBDEV_G_FMT, &fmt); + if (ret < 0) + return -errno; + + *format = fmt.format; + return 0; +} + +int v4l2_subdev_set_format(struct media_entity *entity, + struct v4l2_mbus_framefmt *format, unsigned int pad, + enum v4l2_subdev_format_whence which) +{ + struct v4l2_subdev_format fmt; + int ret; + + ret = v4l2_subdev_open(entity); + if (ret < 0) + return ret; + + memset(&fmt, 0, sizeof(fmt)); + fmt.pad = pad; + fmt.which = which; + fmt.format = *format; + + ret = ioctl(entity->fd, VIDIOC_SUBDEV_S_FMT, &fmt); + if (ret < 0) + return -errno; + + *format = fmt.format; + return 0; +} + +int v4l2_subdev_get_crop(struct media_entity *entity, struct v4l2_rect *rect, + unsigned int pad, enum v4l2_subdev_format_whence which) +{ + struct v4l2_subdev_crop crop; + int ret; + + ret = v4l2_subdev_open(entity); + if (ret < 0) + return ret; + + memset(&crop, 0, sizeof(crop)); + crop.pad = pad; + crop.which = which; + + ret = ioctl(entity->fd, VIDIOC_SUBDEV_G_CROP, &crop); + if (ret < 0) + return -errno; + + *rect = crop.rect; + return 0; +} + +int v4l2_subdev_set_crop(struct media_entity *entity, struct v4l2_rect *rect, + unsigned int pad, enum v4l2_subdev_format_whence which) +{ + struct v4l2_subdev_crop crop; + int ret; + + ret = v4l2_subdev_open(entity); + if (ret < 0) + return ret; + + memset(&crop, 0, sizeof(crop)); + crop.pad = pad; + crop.which = which; + crop.rect = *rect; + + ret = ioctl(entity->fd, VIDIOC_SUBDEV_S_CROP, &crop); + if (ret < 0) + return -errno; + + *rect = crop.rect; + return 0; +} + +int v4l2_subdev_set_frame_interval(struct media_entity *entity, + struct v4l2_fract *interval) +{ + struct v4l2_subdev_frame_interval ival; + int ret; + + ret = v4l2_subdev_open(entity); + if (ret < 0) + return ret; + + memset(&ival, 0, sizeof(ival)); + ival.interval = *interval; + + ret = ioctl(entity->fd, VIDIOC_SUBDEV_S_FRAME_INTERVAL, &ival); + if (ret < 0) + return -errno; + + *interval = ival.interval; + return 0; +} + +/* ----------------------------------------------------------------------------- + * Controls + */ + +int v4l2_subdev_get_control(struct media_entity *entity, unsigned int id, + int32_t *value) +{ + struct v4l2_control ctrl; + int ret; + + ret = v4l2_subdev_open(entity); + if (ret < 0) + return ret; + + ctrl.id = id; + + ret = ioctl(entity->fd, VIDIOC_G_CTRL, &ctrl); + if (ret < 0) { + printf("unable to get control: %s (%d).\n", + strerror(errno), errno); + return -errno; + } + + *value = ctrl.value; + return 0; +} + +int v4l2_subdev_set_control(struct media_entity *entity, unsigned int id, + int32_t *value) +{ + struct v4l2_control ctrl; + int ret; + + ret = v4l2_subdev_open(entity); + if (ret < 0) + return ret; + + ctrl.id = id; + ctrl.value = *value; + + ret = ioctl(entity->fd, VIDIOC_S_CTRL, &ctrl); + if (ret < 0) { + printf("unable to set control: %s (%d).\n", + strerror(errno), errno); + return -errno; + } + + *value = ctrl.value; + return 0; +} + +int v4l2_subdev_get_controls(struct media_entity *entity, unsigned int count, + struct v4l2_ext_control *ctrls) +{ + struct v4l2_ext_controls controls; + int ret; + + ret = v4l2_subdev_open(entity); + if (ret < 0) + return ret; + + memset(&controls, 0, sizeof controls); + controls.count = count; + controls.controls = ctrls; + + ret = ioctl(entity->fd, VIDIOC_G_EXT_CTRLS, &controls); + if (ret < 0) + printf("unable to get multiple controls: %s (%d).\n", + strerror(errno), errno); + + return ret; +} + +int v4l2_subdev_set_controls(struct media_entity *entity, unsigned int count, + struct v4l2_ext_control *ctrls) +{ + struct v4l2_ext_controls controls; + int ret; + + ret = v4l2_subdev_open(entity); + if (ret < 0) + return ret; + + memset(&controls, 0, sizeof controls); + controls.count = count; + controls.controls = ctrls; + + ret = ioctl(entity->fd, VIDIOC_S_EXT_CTRLS, &controls); + if (ret < 0) + printf("unable to set multiple controls: %s (%d).\n", + strerror(errno), errno); + + return ret; +} -- cgit v1.2.3