mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-05-16 23:42:54 +00:00
713f74f4f9
Import the code from gst-plugins-rs (origin is https://github.com/szatmary/libcaption) Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4929>
65 lines
3 KiB
C
65 lines
3 KiB
C
/**********************************************************************************************/
|
|
/* The MIT License */
|
|
/* */
|
|
/* Copyright 2016-2017 Twitch Interactive, Inc. or its affiliates. All Rights Reserved. */
|
|
/* */
|
|
/* Permission is hereby granted, free of charge, to any person obtaining a copy */
|
|
/* of this software and associated documentation files (the "Software"), to deal */
|
|
/* in the Software without restriction, including without limitation the rights */
|
|
/* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell */
|
|
/* copies of the Software, and to permit persons to whom the Software is */
|
|
/* furnished to do so, subject to the following conditions: */
|
|
/* */
|
|
/* The above copyright notice and this permission notice shall be included in */
|
|
/* all copies or substantial portions of the Software. */
|
|
/* */
|
|
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR */
|
|
/* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, */
|
|
/* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE */
|
|
/* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER */
|
|
/* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, */
|
|
/* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN */
|
|
/* THE SOFTWARE. */
|
|
/**********************************************************************************************/
|
|
// http://www.theneitherworld.com/mcpoodle/SCC_TOOLS/DOCS/CC_XDS.HTML#PR
|
|
#include "xds.h"
|
|
#include "caption.h"
|
|
#include <string.h>
|
|
|
|
void
|
|
xds_init (xds_t * xds)
|
|
{
|
|
memset (xds, 0, sizeof (xds_t));
|
|
}
|
|
|
|
int
|
|
xds_decode (xds_t * xds, uint16_t cc)
|
|
{
|
|
switch (xds->state) {
|
|
default:
|
|
case 0:
|
|
xds_init (xds);
|
|
xds->class_code = (cc & 0x0F00) >> 8;
|
|
xds->type = (cc & 0x000F);
|
|
xds->state = 1;
|
|
return LIBCAPTION_OK;
|
|
|
|
case 1:
|
|
if (0x8F00 == (cc & 0xFF00)) {
|
|
xds->checksum = (cc & 0x007F);
|
|
xds->state = 0;
|
|
return LIBCAPTION_READY;
|
|
}
|
|
|
|
if (xds->size < 32) {
|
|
xds->content[xds->size + 0] = (cc & 0x7F00) >> 8;
|
|
xds->content[xds->size + 1] = (cc & 0x007F);
|
|
xds->size += 2;
|
|
return LIBCAPTION_OK;
|
|
}
|
|
}
|
|
|
|
xds->state = 0;
|
|
return LIBCAPTION_ERROR;
|
|
}
|