1 files changed, 54 insertions, 0 deletions
diff --git a/libs/libltc/ltc/decoder.h b/libs/libltc/ltc/decoder.h
new file mode 100644
index 0000000000..fc2556f8ac
--- /dev/null
+++ b/libs/libltc/ltc/decoder.h
@@ -0,0 +1,54 @@
+/*
+   libltc - en+decode linear timecode
+
+   Copyright (C) 2006-2012 Robin Gareus <robin@gareus.org>
+
+   This program 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 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 Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library.
+   If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "ltc/ltc.h"
+#ifndef SAMPLE_CENTER // also defined in encoder.h
+#define SAMPLE_CENTER 128 // unsigned 8 bit.
+#endif
+
+struct LTCDecoder {
+	LTCFrameExt* queue;
+	int queue_len;
+	int queue_read_off;
+	int queue_write_off;
+
+	unsigned char biphase_state;
+	unsigned char biphase_prev;
+	unsigned char snd_to_biphase_state;
+	int snd_to_biphase_cnt;		///< counts the samples in the current period
+	int snd_to_biphase_lmt;	///< specifies when a state-change is considered biphase-clock or 2*biphase-clock
+	double snd_to_biphase_period;	///< track length of a period - used to set snd_to_biphase_lmt
+
+	ltcsnd_sample_t snd_to_biphase_min;
+	ltcsnd_sample_t snd_to_biphase_max;
+
+	unsigned short decoder_sync_word;
+	LTCFrame ltc_frame;
+	int bit_cnt;
+
+	ltc_off_t frame_start_off;
+	ltc_off_t frame_start_prev;
+
+	float biphase_tics[LTC_FRAME_BIT_COUNT];
+	int biphase_tic;
+};
+
+
+void decode_ltc(LTCDecoder *d, ltcsnd_sample_t *sound, size_t size, ltc_off_t posinfo);