avcodec: add TTML encoder

Enables encoding of other subtitle formats into TTML paragraphs.

Signed-off-by: Jan Ekström <jan.ekstrom@24i.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/libavcodec/ttmlenc.h b/libavcodec/ttmlenc.h
new file mode 100644
index 0000000000..c1dd5ec990
--- /dev/null
+++ b/libavcodec/ttmlenc.h
@@ -0,0 +1,28 @@
+/*
+ * TTML subtitle encoder shared functionality
+ * Copyright (c) 2020 24i
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_TTMLENC_H
+#define AVCODEC_TTMLENC_H
+
+#define TTMLENC_EXTRADATA_SIGNATURE "lavc-ttmlenc"
+#define TTMLENC_EXTRADATA_SIGNATURE_SIZE (sizeof(TTMLENC_EXTRADATA_SIGNATURE) - 1)
+
+#endif /* AVCODEC_TTMLENC_H */