chasing indexing error

1 files changed, 0 insertions, 119 deletions

diff --git a/ffmpeg/libavcodec/lagarithrac.h b/ffmpeg/libavcodec/lagarithrac.h
deleted file mode 100644
index 9892d11..0000000
--- a/ffmpeg/libavcodec/lagarithrac.h
+++ /dev/null
@@ -1,119 +0,0 @@
-/*
- * Lagarith range decoder
- * Copyright (c) 2009 Nathan Caldwell <saintdev (at) gmail.com>
- * Copyright (c) 2009 David Conrad
- *
- * 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
- * Lagarith range decoder
- * @author Nathan Caldwell
- * @author David Conrad
- */
-
-#ifndef AVCODEC_LAGARITHRAC_H
-#define AVCODEC_LAGARITHRAC_H
-
-#include <stdint.h>
-#include "libavutil/common.h"
-#include "libavutil/intreadwrite.h"
-#include "avcodec.h"
-#include "get_bits.h"
-
-typedef struct lag_rac {
-    AVCodecContext *avctx;
-    unsigned low;
-    unsigned range;
-    unsigned scale;             /**< Number of bits of precision in range. */
-    unsigned hash_shift;        /**< Number of bits to shift to calculate hash for radix search. */
-
-    const uint8_t *bytestream_start;  /**< Start of input bytestream. */
-    const uint8_t *bytestream;        /**< Current position in input bytestream. */
-    const uint8_t *bytestream_end;    /**< End position of input bytestream. */
-
-    uint32_t prob[258];         /**< Table of cumulative probability for each symbol. */
-    uint8_t  range_hash[256];   /**< Hash table mapping upper byte to approximate symbol. */
-} lag_rac;
-
-void ff_lag_rac_init(lag_rac *l, GetBitContext *gb, int length);
-
-/* TODO: Optimize */
-static inline void lag_rac_refill(lag_rac *l)
-{
-    while (l->range <= 0x800000) {
-        l->low   <<= 8;
-        l->range <<= 8;
-        l->low |= 0xff & (AV_RB16(l->bytestream) >> 1);
-        if (l->bytestream < l->bytestream_end)
-            l->bytestream++;
-    }
-}
-
-/**
- * Decode a single byte from the compressed plane described by *l.
- * @param l pointer to lag_rac for the current plane
- * @return next byte of decoded data
- */
-static inline uint8_t lag_get_rac(lag_rac *l)
-{
-    unsigned range_scaled, low_scaled, div;
-    int val;
-    uint8_t shift;
-
-    lag_rac_refill(l);
-
-    range_scaled = l->range >> l->scale;
-
-    if (l->low < range_scaled * l->prob[255]) {
-        /* val = 0 is frequent enough to deserve a shortcut */
-        if (l->low < range_scaled * l->prob[1]) {
-            val = 0;
-        } else {
-            /* FIXME __builtin_clz is ~20% faster here, but not allowed in generic code. */
-            shift = 30 - av_log2(range_scaled);
-            div = ((range_scaled << shift) + (1 << 23) - 1) >> 23;
-            /* low>>24 ensures that any cases too big for exact FASTDIV are
-             * under- rather than over-estimated
-             */
-            low_scaled = FASTDIV(l->low - (l->low >> 24), div);
-            shift -= l->hash_shift;
-            shift &= 31;
-            low_scaled = (low_scaled << shift) | (low_scaled >> (32 - shift));
-            /* low_scaled is now a lower bound of low/range_scaled */
-            val = l->range_hash[(uint8_t) low_scaled];
-            while (l->low >= range_scaled * l->prob[val + 1])
-                val++;
-        }
-
-        l->range = range_scaled * (l->prob[val + 1] - l->prob[val]);
-    } else {
-        val = 255;
-        l->range -= range_scaled * l->prob[255];
-    }
-
-    if (!l->range)
-        l->range = 0x80;
-
-    l->low -= range_scaled * l->prob[val];
-
-    return val;
-}
-
-
-#endif /* AVCODEC_LAGARITHRAC_H */