Remove get_bits.h

1 files changed, 0 insertions, 595 deletions

diff --git a/libavcodec/get_bits.h b/libavcodec/get_bits.h
deleted file mode 100644
index 66374f523d..0000000000
--- a/libavcodec/get_bits.h
+++ /dev/null
@@ -1,595 +0,0 @@
-/*
- * copyright (c) 2004 Michael Niedermayer <michaelni@gmx.at>
- *
- * This file is part of Libav.
- *
- * Libav 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.
- *
- * Libav 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 Libav; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * bitstream reader API header.
- */
-
-#ifndef AVCODEC_GET_BITS_H
-#define AVCODEC_GET_BITS_H
-
-#include <stdint.h>
-
-#include "libavutil/common.h"
-#include "libavutil/intreadwrite.h"
-#include "libavutil/log.h"
-#include "mathops.h"
-#include "vlc.h"
-
-/*
- * Safe bitstream reading:
- * optionally, the get_bits API can check to ensure that we
- * don't read past input buffer boundaries. This is protected
- * with CONFIG_SAFE_BITSTREAM_READER at the global level, and
- * then below that with UNCHECKED_BITSTREAM_READER at the per-
- * decoder level. This means that decoders that check internally
- * can "#define UNCHECKED_BITSTREAM_READER 1" to disable
- * overread checks.
- * Boundary checking causes a minor performance penalty so for
- * applications that won't want/need this, it can be disabled
- * globally using "#define CONFIG_SAFE_BITSTREAM_READER 0".
- */
-#ifndef UNCHECKED_BITSTREAM_READER
-#define UNCHECKED_BITSTREAM_READER !CONFIG_SAFE_BITSTREAM_READER
-#endif
-
-typedef struct GetBitContext {
-    const uint8_t *buffer, *buffer_end;
-    int index;
-    int size_in_bits;
-#if !UNCHECKED_BITSTREAM_READER
-    int size_in_bits_plus8;
-#endif
-} GetBitContext;
-
-/* Bitstream reader API docs:
- * name
- *   arbitrary name which is used as prefix for the internal variables
- *
- * gb
- *   getbitcontext
- *
- * OPEN_READER(name, gb)
- *   load gb into local variables
- *
- * CLOSE_READER(name, gb)
- *   store local vars in gb
- *
- * UPDATE_CACHE(name, gb)
- *   Refill the internal cache from the bitstream.
- *   After this call at least MIN_CACHE_BITS will be available.
- *
- * GET_CACHE(name, gb)
- *   Will output the contents of the internal cache,
- *   next bit is MSB of 32 or 64 bits (FIXME 64 bits).
- *
- * SHOW_UBITS(name, gb, num)
- *   Will return the next num bits.
- *
- * SHOW_SBITS(name, gb, num)
- *   Will return the next num bits and do sign extension.
- *
- * SKIP_BITS(name, gb, num)
- *   Will skip over the next num bits.
- *   Note, this is equivalent to SKIP_CACHE; SKIP_COUNTER.
- *
- * SKIP_CACHE(name, gb, num)
- *   Will remove the next num bits from the cache (note SKIP_COUNTER
- *   MUST be called before UPDATE_CACHE / CLOSE_READER).
- *
- * SKIP_COUNTER(name, gb, num)
- *   Will increment the internal bit counter (see SKIP_CACHE & SKIP_BITS).
- *
- * LAST_SKIP_BITS(name, gb, num)
- *   Like SKIP_BITS, to be used if next call is UPDATE_CACHE or CLOSE_READER.
- *
- * For examples see get_bits, show_bits, skip_bits, get_vlc.
- */
-
-#ifdef LONG_BITSTREAM_READER
-#   define MIN_CACHE_BITS 32
-#else
-#   define MIN_CACHE_BITS 25
-#endif
-
-#define OPEN_READER_NOSIZE(name, gb)            \
-    unsigned int name ## _index = (gb)->index;  \
-    unsigned int av_unused name ## _cache = 0
-
-#if UNCHECKED_BITSTREAM_READER
-#define OPEN_READER(name, gb) OPEN_READER_NOSIZE(name, gb)
-
-#define BITS_AVAILABLE(name, gb) 1
-#else
-#define OPEN_READER(name, gb)                   \
-    OPEN_READER_NOSIZE(name, gb);               \
-    unsigned int name ## _size_plus8 = (gb)->size_in_bits_plus8
-
-#define BITS_AVAILABLE(name, gb) name ## _index < name ## _size_plus8
-#endif
-
-#define CLOSE_READER(name, gb) (gb)->index = name ## _index
-
-#ifdef BITSTREAM_READER_LE
-
-# ifdef LONG_BITSTREAM_READER
-#   define UPDATE_CACHE(name, gb) name ## _cache = \
-        AV_RL64((gb)->buffer + (name ## _index >> 3)) >> (name ## _index & 7)
-# else
-#   define UPDATE_CACHE(name, gb) name ## _cache = \
-        AV_RL32((gb)->buffer + (name ## _index >> 3)) >> (name ## _index & 7)
-# endif
-
-# define SKIP_CACHE(name, gb, num) name ## _cache >>= (num)
-
-#else
-
-# ifdef LONG_BITSTREAM_READER
-#   define UPDATE_CACHE(name, gb) name ## _cache = \
-        AV_RB64((gb)->buffer + (name ## _index >> 3)) >> (32 - (name ## _index & 7))
-# else
-#   define UPDATE_CACHE(name, gb) name ## _cache = \
-        AV_RB32((gb)->buffer + (name ## _index >> 3)) << (name ## _index & 7)
-# endif
-
-# define SKIP_CACHE(name, gb, num) name ## _cache <<= (num)
-
-#endif
-
-#if UNCHECKED_BITSTREAM_READER
-#   define SKIP_COUNTER(name, gb, num) name ## _index += (num)
-#else
-#   define SKIP_COUNTER(name, gb, num) \
-    name ## _index = FFMIN(name ## _size_plus8, name ## _index + (num))
-#endif
-
-#define SKIP_BITS(name, gb, num)                \
-    do {                                        \
-        SKIP_CACHE(name, gb, num);              \
-        SKIP_COUNTER(name, gb, num);            \
-    } while (0)
-
-#define LAST_SKIP_BITS(name, gb, num) SKIP_COUNTER(name, gb, num)
-
-#ifdef BITSTREAM_READER_LE
-#   define SHOW_UBITS(name, gb, num) zero_extend(name ## _cache, num)
-#   define SHOW_SBITS(name, gb, num) sign_extend(name ## _cache, num)
-#else
-#   define SHOW_UBITS(name, gb, num) NEG_USR32(name ## _cache, num)
-#   define SHOW_SBITS(name, gb, num) NEG_SSR32(name ## _cache, num)
-#endif
-
-#define GET_CACHE(name, gb) ((uint32_t) name ## _cache)
-
-static inline int get_bits_count(const GetBitContext *s)
-{
-    return s->index;
-}
-
-static inline void skip_bits_long(GetBitContext *s, int n)
-{
-#if UNCHECKED_BITSTREAM_READER
-    s->index += n;
-#else
-    s->index += av_clip(n, -s->index, s->size_in_bits_plus8 - s->index);
-#endif
-}
-
-/**
- * Read MPEG-1 dc-style VLC (sign bit + mantisse with no MSB).
- * if MSB not set it is negative
- * @param n length in bits
- */
-static inline int get_xbits(GetBitContext *s, int n)
-{
-    register int sign;
-    register int32_t cache;
-    OPEN_READER(re, s);
-    UPDATE_CACHE(re, s);
-    cache = GET_CACHE(re, s);
-    sign  = ~cache >> 31;
-    LAST_SKIP_BITS(re, s, n);
-    CLOSE_READER(re, s);
-    return (NEG_USR32(sign ^ cache, n) ^ sign) - sign;
-}
-
-static inline int get_sbits(GetBitContext *s, int n)
-{
-    register int tmp;
-    OPEN_READER(re, s);
-    UPDATE_CACHE(re, s);
-    tmp = SHOW_SBITS(re, s, n);
-    LAST_SKIP_BITS(re, s, n);
-    CLOSE_READER(re, s);
-    return tmp;
-}
-
-/**
- * Read 1-25 bits.
- */
-static inline unsigned int get_bits(GetBitContext *s, int n)
-{
-    register int tmp;
-    OPEN_READER(re, s);
-    UPDATE_CACHE(re, s);
-    tmp = SHOW_UBITS(re, s, n);
-    LAST_SKIP_BITS(re, s, n);
-    CLOSE_READER(re, s);
-    return tmp;
-}
-
-/**
- * Read 0-25 bits.
- */
-static av_always_inline int get_bitsz(GetBitContext *s, int n)
-{
-    return n ? get_bits(s, n) : 0;
-}
-
-/**
- * Show 1-25 bits.
- */
-static inline unsigned int show_bits(GetBitContext *s, int n)
-{
-    register int tmp;
-    OPEN_READER_NOSIZE(re, s);
-    UPDATE_CACHE(re, s);
-    tmp = SHOW_UBITS(re, s, n);
-    return tmp;
-}
-
-static inline void skip_bits(GetBitContext *s, int n)
-{
-    OPEN_READER(re, s);
-    UPDATE_CACHE(re, s);
-    LAST_SKIP_BITS(re, s, n);
-    CLOSE_READER(re, s);
-}
-
-static inline unsigned int get_bits1(GetBitContext *s)
-{
-    unsigned int index = s->index;
-    uint8_t result     = s->buffer[index >> 3];
-#ifdef BITSTREAM_READER_LE
-    result >>= index & 7;
-    result  &= 1;
-#else
-    result <<= index & 7;
-    result >>= 8 - 1;
-#endif
-#if !UNCHECKED_BITSTREAM_READER
-    if (s->index < s->size_in_bits_plus8)
-#endif
-        index++;
-    s->index = index;
-
-    return result;
-}
-
-static inline unsigned int show_bits1(GetBitContext *s)
-{
-    return show_bits(s, 1);
-}
-
-static inline void skip_bits1(GetBitContext *s)
-{
-    skip_bits(s, 1);
-}
-
-/**
- * Read 0-32 bits.
- */
-static inline unsigned int get_bits_long(GetBitContext *s, int n)
-{
-    if (n <= MIN_CACHE_BITS) {
-        return get_bits(s, n);
-    } else {
-#ifdef BITSTREAM_READER_LE
-        int ret = get_bits(s, 16);
-        return ret | (get_bits(s, n - 16) << 16);
-#else
-        int ret = get_bits(s, 16) << (n - 16);
-        return ret | get_bits(s, n - 16);
-#endif
-    }
-}
-
-/*
- * Read 0-64 bits.
- */
-static inline uint64_t get_bits64(GetBitContext *s, int n)
-{
-    if (n <= 32) {
-        return get_bits_long(s, n);
-    } else {
-#ifdef BITSTREAM_READER_LE
-        uint64_t ret = get_bits_long(s, 32);
-        return ret | (uint64_t) get_bits_long(s, n - 32) << 32;
-#else
-        uint64_t ret = (uint64_t) get_bits_long(s, n - 32) << 32;
-        return ret | get_bits_long(s, 32);
-#endif
-    }
-}
-
-/**
- * Read 0-32 bits as a signed integer.
- */
-static inline int get_sbits_long(GetBitContext *s, int n)
-{
-    return sign_extend(get_bits_long(s, n), n);
-}
-
-/**
- * Show 0-32 bits.
- */
-static inline unsigned int show_bits_long(GetBitContext *s, int n)
-{
-    if (n <= MIN_CACHE_BITS) {
-        return show_bits(s, n);
-    } else {
-        GetBitContext gb = *s;
-        return get_bits_long(&gb, n);
-    }
-}
-
-/**
- * Initialize GetBitContext.
- * @param buffer bitstream buffer, must be AV_INPUT_BUFFER_PADDING_SIZE bytes
- *        larger than the actual read bits because some optimized bitstream
- *        readers read 32 or 64 bit at once and could read over the end
- * @param bit_size the size of the buffer in bits
- * @return 0 on success, AVERROR_INVALIDDATA if the buffer_size would overflow.
- */
-static inline int init_get_bits(GetBitContext *s, const uint8_t *buffer,
-                                int bit_size)
-{
-    int buffer_size;
-    int ret = 0;
-
-    if (bit_size > INT_MAX - 7 || bit_size < 0 || !buffer) {
-        bit_size    = 0;
-        buffer      = NULL;
-        ret         = AVERROR_INVALIDDATA;
-    }
-
-    buffer_size = (bit_size + 7) >> 3;
-
-    s->buffer             = buffer;
-    s->size_in_bits       = bit_size;
-#if !UNCHECKED_BITSTREAM_READER
-    s->size_in_bits_plus8 = bit_size + 8;
-#endif
-    s->buffer_end         = buffer + buffer_size;
-    s->index              = 0;
-
-    return ret;
-}
-
-/**
- * Initialize GetBitContext.
- * @param buffer bitstream buffer, must be AV_INPUT_BUFFER_PADDING_SIZE bytes
- *        larger than the actual read bits because some optimized bitstream
- *        readers read 32 or 64 bit at once and could read over the end
- * @param byte_size the size of the buffer in bytes
- * @return 0 on success, AVERROR_INVALIDDATA if the buffer_size would overflow.
- */
-static inline int init_get_bits8(GetBitContext *s, const uint8_t *buffer,
-                                 int byte_size)
-{
-    if (byte_size > INT_MAX / 8)
-        return AVERROR_INVALIDDATA;
-    return init_get_bits(s, buffer, byte_size * 8);
-}
-
-static inline const uint8_t *align_get_bits(GetBitContext *s)
-{
-    int n = -get_bits_count(s) & 7;
-    if (n)
-        skip_bits(s, n);
-    return s->buffer + (s->index >> 3);
-}
-
-/**
- * If the vlc code is invalid and max_depth=1, then no bits will be removed.
- * If the vlc code is invalid and max_depth>1, then the number of bits removed
- * is undefined.
- */
-#define GET_VLC(code, name, gb, table, bits, max_depth)         \
-    do {                                                        \
-        int n, nb_bits;                                         \
-        unsigned int index;                                     \
-                                                                \
-        index = SHOW_UBITS(name, gb, bits);                     \
-        code  = table[index][0];                                \
-        n     = table[index][1];                                \
-                                                                \
-        if (max_depth > 1 && n < 0) {                           \
-            LAST_SKIP_BITS(name, gb, bits);                     \
-            UPDATE_CACHE(name, gb);                             \
-                                                                \
-            nb_bits = -n;                                       \
-                                                                \
-            index = SHOW_UBITS(name, gb, nb_bits) + code;       \
-            code  = table[index][0];                            \
-            n     = table[index][1];                            \
-            if (max_depth > 2 && n < 0) {                       \
-                LAST_SKIP_BITS(name, gb, nb_bits);              \
-                UPDATE_CACHE(name, gb);                         \
-                                                                \
-                nb_bits = -n;                                   \
-                                                                \
-                index = SHOW_UBITS(name, gb, nb_bits) + code;   \
-                code  = table[index][0];                        \
-                n     = table[index][1];                        \
-            }                                                   \
-        }                                                       \
-        SKIP_BITS(name, gb, n);                                 \
-    } while (0)
-
-#define GET_RL_VLC(level, run, name, gb, table, bits,           \
-                   max_depth, need_update)                      \
-    do {                                                        \
-        int n, nb_bits;                                         \
-        unsigned int index;                                     \
-                                                                \
-        index = SHOW_UBITS(name, gb, bits);                     \
-        level = table[index].level;                             \
-        n     = table[index].len;                               \
-                                                                \
-        if (max_depth > 1 && n < 0) {                           \
-            SKIP_BITS(name, gb, bits);                          \
-            if (need_update) {                                  \
-                UPDATE_CACHE(name, gb);                         \
-            }                                                   \
-                                                                \
-            nb_bits = -n;                                       \
-                                                                \
-            index = SHOW_UBITS(name, gb, nb_bits) + level;      \
-            level = table[index].level;                         \
-            n     = table[index].len;                           \
-            if (max_depth > 2 && n < 0) {                       \
-                LAST_SKIP_BITS(name, gb, nb_bits);              \
-                if (need_update) {                              \
-                    UPDATE_CACHE(name, gb);                     \
-                }                                               \
-                nb_bits = -n;                                   \
-                                                                \
-                index = SHOW_UBITS(name, gb, nb_bits) + level;  \
-                level = table[index].level;                     \
-                n     = table[index].len;                       \
-            }                                                   \
-        }                                                       \
-        run = table[index].run;                                 \
-        SKIP_BITS(name, gb, n);                                 \
-    } while (0)
-
-/**
- * Parse a vlc code.
- * @param bits is the number of bits which will be read at once, must be
- *             identical to nb_bits in init_vlc()
- * @param max_depth is the number of times bits bits must be read to completely
- *                  read the longest vlc code
- *                  = (max_vlc_length + bits - 1) / bits
- */
-static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE (*table)[2],
-                                     int bits, int max_depth)
-{
-    int code;
-
-    OPEN_READER(re, s);
-    UPDATE_CACHE(re, s);
-
-    GET_VLC(code, re, s, table, bits, max_depth);
-
-    CLOSE_READER(re, s);
-
-    return code;
-}
-
-static inline int decode012(GetBitContext *gb)
-{
-    int n;
-    n = get_bits1(gb);
-    if (n == 0)
-        return 0;
-    else
-        return get_bits1(gb) + 1;
-}
-
-static inline int decode210(GetBitContext *gb)
-{
-    if (get_bits1(gb))
-        return 0;
-    else
-        return 2 - get_bits1(gb);
-}
-
-static inline int get_bits_left(GetBitContext *gb)
-{
-    return gb->size_in_bits - get_bits_count(gb);
-}
-
-//#define TRACE
-
-#ifdef TRACE
-static inline void print_bin(int bits, int n)
-{
-    int i;
-
-    for (i = n - 1; i >= 0; i--)
-        av_log(NULL, AV_LOG_DEBUG, "%d", (bits >> i) & 1);
-    for (i = n; i < 24; i++)
-        av_log(NULL, AV_LOG_DEBUG, " ");
-}
-
-static inline int get_bits_trace(GetBitContext *s, int n, const char *file,
-                                 const char *func, int line)
-{
-    int r = get_bits(s, n);
-
-    print_bin(r, n);
-    av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d bit @%5d in %s %s:%d\n",
-           r, n, r, get_bits_count(s) - n, file, func, line);
-
-    return r;
-}
-
-static inline int get_vlc_trace(GetBitContext *s, VLC_TYPE (*table)[2],
-                                int bits, int max_depth, const char *file,
-                                const char *func, int line)
-{
-    int show  = show_bits(s, 24);
-    int pos   = get_bits_count(s);
-    int r     = get_vlc2(s, table, bits, max_depth);
-    int len   = get_bits_count(s) - pos;
-    int bits2 = show >> (24 - len);
-
-    print_bin(bits2, len);
-
-    av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d vlc @%5d in %s %s:%d\n",
-           bits2, len, r, pos, file, func, line);
-
-    return r;
-}
-
-static inline int get_xbits_trace(GetBitContext *s, int n, const char *file,
-                                  const char *func, int line)
-{
-    int show = show_bits(s, n);
-    int r    = get_xbits(s, n);
-
-    print_bin(show, n);
-    av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d xbt @%5d in %s %s:%d\n",
-           show, n, r, get_bits_count(s) - n, file, func, line);
-
-    return r;
-}
-
-#define get_bits(s, n)  get_bits_trace(s , n, __FILE__, __PRETTY_FUNCTION__, __LINE__)
-#define get_bits1(s)    get_bits_trace(s,  1, __FILE__, __PRETTY_FUNCTION__, __LINE__)
-#define get_xbits(s, n) get_xbits_trace(s, n, __FILE__, __PRETTY_FUNCTION__, __LINE__)
-
-#define get_vlc(s, vlc)             get_vlc_trace(s, (vlc)->table, (vlc)->bits,   3, __FILE__, __PRETTY_FUNCTION__, __LINE__)
-#define get_vlc2(s, tab, bits, max) get_vlc_trace(s,          tab,        bits, max, __FILE__, __PRETTY_FUNCTION__, __LINE__)
-#endif
-
-#endif /* AVCODEC_GET_BITS_H */