From 8992cb1d0d07edc33d274f6d7924ecdf6f83d994 Mon Sep 17 00:00:00 2001
From: Tim Redfern <tim@eclectronics.org>
Date: Thu, 5 Sep 2013 17:57:22 +0100
Subject: making act segmenter

---
 ffmpeg/libavcodec/cabac.h | 56 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 ffmpeg/libavcodec/cabac.h

(limited to 'ffmpeg/libavcodec/cabac.h')

diff --git a/ffmpeg/libavcodec/cabac.h b/ffmpeg/libavcodec/cabac.h
new file mode 100644
index 0000000..d4bafe0
--- /dev/null
+++ b/ffmpeg/libavcodec/cabac.h
@@ -0,0 +1,56 @@
+/*
+ * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
+ * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * Context Adaptive Binary Arithmetic Coder.
+ */
+
+#ifndef AVCODEC_CABAC_H
+#define AVCODEC_CABAC_H
+
+#include <stdint.h>
+
+#include "put_bits.h"
+
+#define H264_NORM_SHIFT_OFFSET 0
+#define H264_LPS_RANGE_OFFSET 512
+#define H264_MLPS_STATE_OFFSET 1024
+#define H264_LAST_COEFF_FLAG_OFFSET_8x8_OFFSET 1280
+
+#define CABAC_BITS 16
+#define CABAC_MASK ((1<<CABAC_BITS)-1)
+
+typedef struct CABACContext{
+    int low;
+    int range;
+    int outstanding_count;
+    const uint8_t *bytestream_start;
+    const uint8_t *bytestream;
+    const uint8_t *bytestream_end;
+    PutBitContext pb;
+}CABACContext;
+
+void ff_init_cabac_encoder(CABACContext *c, uint8_t *buf, int buf_size);
+void ff_init_cabac_decoder(CABACContext *c, const uint8_t *buf, int buf_size);
+void ff_init_cabac_states(void);
+
+#endif /* AVCODEC_CABAC_H */
-- 
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