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tc358743 hacks

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This commit is contained in:
Maxim Devaev
2022-06-06 19:32:49 +03:00
parent 054748234e
commit 2e0a19c1cb
6 changed files with 137 additions and 4 deletions
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64
janus/src/tc358743.c Normal file
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/*****************************************************************************
# #
# uStreamer - Lightweight and fast MJPEG-HTTP streamer. #
# #
# Copyright (C) 2018-2022 Maxim Devaev <mdevaev@gmail.com> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation, either version 3 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 General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program. If not, see <https://www.gnu.org/licenses/>. #
# #
*****************************************************************************/
#include "tc358743.h"
#ifndef V4L2_CID_USER_TC358743_BASE
# define V4L2_CID_USER_TC358743_BASE (V4L2_CID_USER_BASE + 0x1080)
#endif
#ifndef TC358743_CID_AUDIO_PRESENT
# define TC358743_CID_AUDIO_PRESENT (V4L2_CID_USER_TC358743_BASE + 1)
#endif
#ifndef TC358743_CID_AUDIO_SAMPLING_RATE
# define TC358743_CID_AUDIO_SAMPLING_RATE (V4L2_CID_USER_TC358743_BASE + 0)
#endif
int tc358743_read_info(const char *path, tc358743_info_s *info) {
MEMSET_ZERO(*info);
int fd = -1;
if ((fd = open(path, O_RDWR)) < 0) {
JLOG_PERROR("audio", "Can't open TC358743 V4L2 device");
return -1;
}
# define READ_CID(_cid, _field) { \
struct v4l2_control ctl = {0}; \
ctl.id = _cid; \
if (xioctl(fd, VIDIOC_G_CTRL, &ctl) < 0) { \
JLOG_PERROR("audio", "Can't get value of " #_cid); \
close(fd); \
return -1; \
} \
info->_field = ctl.value; \
}
READ_CID(TC358743_CID_AUDIO_PRESENT, has_audio);
READ_CID(TC358743_CID_AUDIO_SAMPLING_RATE, audio_hz);
# undef READ_CID
close(fd);
return 0;
}