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https://github.com/pikvm/ustreamer.git
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65 lines
2.6 KiB
C
65 lines
2.6 KiB
C
/*****************************************************************************
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# #
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# uStreamer - Lightweight and fast MJPEG-HTTP streamer. #
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# #
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# Copyright (C) 2018-2023 Maxim Devaev <mdevaev@gmail.com> #
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# #
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# This program is free software: you can redistribute it and/or modify #
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# it under the terms of the GNU General Public License as published by #
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# the Free Software Foundation, either version 3 of the License, or #
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# (at your option) any later version. #
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# #
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# This program is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY; without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# GNU General Public License for more details. #
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# #
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# You should have received a copy of the GNU General Public License #
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# along with this program. If not, see <https://www.gnu.org/licenses/>. #
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# #
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*****************************************************************************/
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#include "tc358743.h"
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#ifndef V4L2_CID_USER_TC358743_BASE
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# define V4L2_CID_USER_TC358743_BASE (V4L2_CID_USER_BASE + 0x1080)
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#endif
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#ifndef TC358743_CID_AUDIO_PRESENT
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# define TC358743_CID_AUDIO_PRESENT (V4L2_CID_USER_TC358743_BASE + 1)
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#endif
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#ifndef TC358743_CID_AUDIO_SAMPLING_RATE
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# define TC358743_CID_AUDIO_SAMPLING_RATE (V4L2_CID_USER_TC358743_BASE + 0)
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#endif
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int us_tc358743_read_info(const char *path, us_tc358743_info_s *info) {
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US_MEMSET_ZERO(*info);
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int fd = -1;
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if ((fd = open(path, O_RDWR)) < 0) {
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US_JLOG_PERROR("audio", "Can't open TC358743 V4L2 device");
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return -1;
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}
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# define READ_CID(x_cid, x_field) { \
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struct v4l2_control m_ctl = {0}; \
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m_ctl.id = x_cid; \
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if (us_xioctl(fd, VIDIOC_G_CTRL, &m_ctl) < 0) { \
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US_JLOG_PERROR("audio", "Can't get value of " #x_cid); \
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close(fd); \
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return -1; \
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} \
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info->x_field = m_ctl.value; \
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}
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READ_CID(TC358743_CID_AUDIO_PRESENT, has_audio);
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READ_CID(TC358743_CID_AUDIO_SAMPLING_RATE, audio_hz);
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# undef READ_CID
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close(fd);
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return 0;
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}
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