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