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Unlike other cases where the closed captions are embedded in the video stream as MPEG-2 userdata or H.264 SEI data, with MOV files the captions are often found on a separate "e608" subtitle track. Add support for playout of such files, leveraging the new ccfifo mechanism to ensure that they are embedded into VANC at the correct rate (since e608 packets often contain batches of multiple 608 pairs). Note this patch includes a new file named libavdevice/ccfifo.c, which allows the ccfifo functionality in libavfilter to be reused even if doing shared builds. This is the same approach used for log2_tab.c. Signed-off-by: Devin Heitmueller <dheitmueller@ltnglobal.com> Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
25 lines
942 B
C
25 lines
942 B
C
/*
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* CEA-708 Closed Captioning FIFO
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* Copyright (c) 2023 LTN Global Communications
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*
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* Author: Devin Heitmueller <dheitmueller@ltnglobal.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavfilter/ccfifo.c"
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