--- /dev/null
+/*********************************************************************
+* Software License Agreement (BSD License)
+*
+* Copyright (C) 2010-2012 Ken Tossell
+* All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions
+* are met:
+*
+* * Redistributions of source code must retain the above copyright
+* notice, this list of conditions and the following disclaimer.
+* * Redistributions in binary form must reproduce the above
+* copyright notice, this list of conditions and the following
+* disclaimer in the documentation and/or other materials provided
+* with the distribution.
+* * Neither the name of the author nor other contributors may be
+* used to endorse or promote products derived from this software
+* without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+* POSSIBILITY OF SUCH DAMAGE.
+*********************************************************************/
+/**
+ * @defgroup ctrl Video capture and processing controls
+ * @brief Functions for manipulating device settings and stream parameters
+ *
+ * The `uvc_get_*` and `uvc_set_*` functions are used to read and write the settings associated
+ * with the device's input, processing and output units.
+ */
+
+#include "libuvc/libuvc.h"
+#include "libuvc/libuvc_internal.h"
+
+static const int REQ_TYPE_SET = 0x21;
+static const int REQ_TYPE_GET = 0xa1;
+
+/***** GENERIC CONTROLS *****/
+/**
+ * @brief Get the length of a control on a terminal or unit.
+ *
+ * @param devh UVC device handle
+ * @param unit Unit or Terminal ID; obtain this from the uvc_extension_unit_t describing the extension unit
+ * @param ctrl Vendor-specific control number to query
+ * @return On success, the length of the control as reported by the device. Otherwise,
+ * a uvc_error_t error describing the error encountered.
+ * @ingroup ctrl
+ */
+int uvc_get_ctrl_len(uvc_device_handle_t *devh, uint8_t unit, uint8_t ctrl) {
+ unsigned char buf[2];
+
+ int ret = libusb_control_transfer(
+ devh->usb_devh,
+ REQ_TYPE_GET, UVC_GET_LEN,
+ ctrl << 8,
+ unit << 8 | devh->info->ctrl_if.bInterfaceNumber, // XXX saki
+ buf,
+ 2,
+ 0 /* timeout */);
+
+ if (ret < 0)
+ return ret;
+ else
+ return (unsigned short)SW_TO_SHORT(buf);
+}
+
+/**
+ * @brief Perform a GET_* request from an extension unit.
+ *
+ * @param devh UVC device handle
+ * @param unit Unit ID; obtain this from the uvc_extension_unit_t describing the extension unit
+ * @param ctrl Control number to query
+ * @param data Data buffer to be filled by the device
+ * @param len Size of data buffer
+ * @param req_code GET_* request to execute
+ * @return On success, the number of bytes actually transferred. Otherwise,
+ * a uvc_error_t error describing the error encountered.
+ * @ingroup ctrl
+ */
+int uvc_get_ctrl(uvc_device_handle_t *devh, uint8_t unit, uint8_t ctrl, void *data, int len, enum uvc_req_code req_code) {
+ return libusb_control_transfer(
+ devh->usb_devh,
+ REQ_TYPE_GET, req_code,
+ ctrl << 8,
+ unit << 8 | devh->info->ctrl_if.bInterfaceNumber, // XXX saki
+ data,
+ len,
+ 0 /* timeout */);
+}
+
+/**
+ * @brief Perform a SET_CUR request to a terminal or unit.
+ *
+ * @param devh UVC device handle
+ * @param unit Unit or Terminal ID
+ * @param ctrl Control number to set
+ * @param data Data buffer to be sent to the device
+ * @param len Size of data buffer
+ * @return On success, the number of bytes actually transferred. Otherwise,
+ * a uvc_error_t error describing the error encountered.
+ * @ingroup ctrl
+ */
+int uvc_set_ctrl(uvc_device_handle_t *devh, uint8_t unit, uint8_t ctrl, void *data, int len) {
+ return libusb_control_transfer(
+ devh->usb_devh,
+ REQ_TYPE_SET, UVC_SET_CUR,
+ ctrl << 8,
+ unit << 8 | devh->info->ctrl_if.bInterfaceNumber, // XXX saki
+ data,
+ len,
+ 0 /* timeout */);
+}
+
+/***** INTERFACE CONTROLS *****/
+uvc_error_t uvc_get_power_mode(uvc_device_handle_t *devh, enum uvc_device_power_mode *mode, enum uvc_req_code req_code) {
+ uint8_t mode_char;
+ uvc_error_t ret;
+
+ ret = libusb_control_transfer(
+ devh->usb_devh,
+ REQ_TYPE_GET, req_code,
+ UVC_VC_VIDEO_POWER_MODE_CONTROL << 8,
+ devh->info->ctrl_if.bInterfaceNumber, // XXX saki
+ &mode_char,
+ sizeof(mode_char),
+ 0);
+
+ if (ret == 1) {
+ *mode = mode_char;
+ return UVC_SUCCESS;
+ } else {
+ return ret;
+ }
+}
+
+uvc_error_t uvc_set_power_mode(uvc_device_handle_t *devh, enum uvc_device_power_mode mode) {
+ uint8_t mode_char = mode;
+ uvc_error_t ret;
+
+ ret = libusb_control_transfer(
+ devh->usb_devh,
+ REQ_TYPE_SET, UVC_SET_CUR,
+ UVC_VC_VIDEO_POWER_MODE_CONTROL << 8,
+ devh->info->ctrl_if.bInterfaceNumber, // XXX saki
+ &mode_char,
+ sizeof(mode_char),
+ 0);
+
+ if (ret == 1)
+ return UVC_SUCCESS;
+ else
+ return ret;
+}
+
+/** @todo Request Error Code Control (UVC 1.5, 4.2.1.2) */
projects / rtmpclient.git / blobdiff