diff options
Diffstat (limited to 'libavcodec/golomb_legacy.h')
-rw-r--r-- | libavcodec/golomb_legacy.h | 573 |
1 files changed, 0 insertions, 573 deletions
diff --git a/libavcodec/golomb_legacy.h b/libavcodec/golomb_legacy.h deleted file mode 100644 index 9fafbcd..0000000 --- a/libavcodec/golomb_legacy.h +++ /dev/null @@ -1,573 +0,0 @@ -/* - * exp golomb vlc stuff - * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> - * Copyright (c) 2004 Alex Beregszaszi - * - * 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 - * @brief - * exp golomb vlc stuff - * @author Michael Niedermayer <michaelni@gmx.at> and Alex Beregszaszi - */ - -#ifndef AVCODEC_GOLOMB_H -#define AVCODEC_GOLOMB_H - -#include <stdint.h> - -#include "get_bits.h" -#include "put_bits.h" - -#define INVALID_VLC 0x80000000 - -extern const uint8_t ff_golomb_vlc_len[512]; -extern const uint8_t ff_ue_golomb_vlc_code[512]; -extern const int8_t ff_se_golomb_vlc_code[512]; -extern const uint8_t ff_ue_golomb_len[256]; - -extern const uint8_t ff_interleaved_golomb_vlc_len[256]; -extern const uint8_t ff_interleaved_ue_golomb_vlc_code[256]; -extern const int8_t ff_interleaved_se_golomb_vlc_code[256]; -extern const uint8_t ff_interleaved_dirac_golomb_vlc_code[256]; - -/** - * read unsigned exp golomb code. - */ -static inline int get_ue_golomb(GetBitContext *gb) -{ - unsigned int buf; - - OPEN_READER(re, gb); - UPDATE_CACHE(re, gb); - buf = GET_CACHE(re, gb); - - if (buf >= (1 << 27)) { - buf >>= 32 - 9; - LAST_SKIP_BITS(re, gb, ff_golomb_vlc_len[buf]); - CLOSE_READER(re, gb); - - return ff_ue_golomb_vlc_code[buf]; - } else { - int log = 2 * av_log2(buf) - 31; - buf >>= log; - buf--; - LAST_SKIP_BITS(re, gb, 32 - log); - CLOSE_READER(re, gb); - - return buf; - } -} - -/** - * Read an unsigned Exp-Golomb code in the range 0 to UINT32_MAX-1. - */ -static inline unsigned get_ue_golomb_long(GetBitContext *gb) -{ - unsigned buf, log; - - buf = show_bits_long(gb, 32); - log = 31 - av_log2(buf); - skip_bits_long(gb, log); - - return get_bits_long(gb, log + 1) - 1; -} - -/** - * read unsigned exp golomb code, constraint to a max of 31. - * the return value is undefined if the stored value exceeds 31. - */ -static inline int get_ue_golomb_31(GetBitContext *gb) -{ - unsigned int buf; - - OPEN_READER(re, gb); - UPDATE_CACHE(re, gb); - buf = GET_CACHE(re, gb); - - buf >>= 32 - 9; - LAST_SKIP_BITS(re, gb, ff_golomb_vlc_len[buf]); - CLOSE_READER(re, gb); - - return ff_ue_golomb_vlc_code[buf]; -} - -static inline unsigned get_interleaved_ue_golomb(GetBitContext *gb) -{ - uint32_t buf; - - OPEN_READER(re, gb); - UPDATE_CACHE(re, gb); - buf = GET_CACHE(re, gb); - - if (buf & 0xAA800000) { - buf >>= 32 - 8; - LAST_SKIP_BITS(re, gb, ff_interleaved_golomb_vlc_len[buf]); - CLOSE_READER(re, gb); - - return ff_interleaved_ue_golomb_vlc_code[buf]; - } else { - unsigned ret = 1; - - do { - buf >>= 32 - 8; - LAST_SKIP_BITS(re, gb, - FFMIN(ff_interleaved_golomb_vlc_len[buf], 8)); - - if (ff_interleaved_golomb_vlc_len[buf] != 9) { - ret <<= (ff_interleaved_golomb_vlc_len[buf] - 1) >> 1; - ret |= ff_interleaved_dirac_golomb_vlc_code[buf]; - break; - } - ret = (ret << 4) | ff_interleaved_dirac_golomb_vlc_code[buf]; - UPDATE_CACHE(re, gb); - buf = GET_CACHE(re, gb); - } while (BITS_AVAILABLE(re, gb)); - - CLOSE_READER(re, gb); - return ret - 1; - } -} - -/** - * read unsigned truncated exp golomb code. - */ -static inline int get_te0_golomb(GetBitContext *gb, int range) -{ - assert(range >= 1); - - if (range == 1) - return 0; - else if (range == 2) - return get_bits1(gb) ^ 1; - else - return get_ue_golomb(gb); -} - -/** - * read unsigned truncated exp golomb code. - */ -static inline int get_te_golomb(GetBitContext *gb, int range) -{ - assert(range >= 1); - - if (range == 2) - return get_bits1(gb) ^ 1; - else - return get_ue_golomb(gb); -} - -/** - * read signed exp golomb code. - */ -static inline int get_se_golomb(GetBitContext *gb) -{ - unsigned int buf; - - OPEN_READER(re, gb); - UPDATE_CACHE(re, gb); - buf = GET_CACHE(re, gb); - - if (buf >= (1 << 27)) { - buf >>= 32 - 9; - LAST_SKIP_BITS(re, gb, ff_golomb_vlc_len[buf]); - CLOSE_READER(re, gb); - - return ff_se_golomb_vlc_code[buf]; - } else { - int log = 2 * av_log2(buf) - 31; - buf >>= log; - - LAST_SKIP_BITS(re, gb, 32 - log); - CLOSE_READER(re, gb); - - if (buf & 1) - buf = -(buf >> 1); - else - buf = (buf >> 1); - - return buf; - } -} - -static inline int get_se_golomb_long(GetBitContext *gb) -{ - unsigned int buf = get_ue_golomb_long(gb); - - if (buf & 1) - buf = (buf + 1) >> 1; - else - buf = -(buf >> 1); - - return buf; -} - -static inline int get_interleaved_se_golomb(GetBitContext *gb) -{ - unsigned int buf; - - OPEN_READER(re, gb); - UPDATE_CACHE(re, gb); - buf = GET_CACHE(re, gb); - - if (buf & 0xAA800000) { - buf >>= 32 - 8; - LAST_SKIP_BITS(re, gb, ff_interleaved_golomb_vlc_len[buf]); - CLOSE_READER(re, gb); - - return ff_interleaved_se_golomb_vlc_code[buf]; - } else { - int log; - LAST_SKIP_BITS(re, gb, 8); - UPDATE_CACHE(re, gb); - buf |= 1 | (GET_CACHE(re, gb) >> 8); - - if ((buf & 0xAAAAAAAA) == 0) - return INVALID_VLC; - - for (log = 31; (buf & 0x80000000) == 0; log--) - buf = (buf << 2) - ((buf << log) >> (log - 1)) + (buf >> 30); - - LAST_SKIP_BITS(re, gb, 63 - 2 * log - 8); - CLOSE_READER(re, gb); - - return (signed) (((((buf << log) >> log) - 1) ^ -(buf & 0x1)) + 1) >> 1; - } -} - -static inline int dirac_get_se_golomb(GetBitContext *gb) -{ - uint32_t ret = get_interleaved_ue_golomb(gb); - - if (ret) { - uint32_t buf; - OPEN_READER(re, gb); - UPDATE_CACHE(re, gb); - buf = SHOW_SBITS(re, gb, 1); - LAST_SKIP_BITS(re, gb, 1); - ret = (ret ^ buf) - buf; - CLOSE_READER(re, gb); - } - - return ret; -} - -/** - * read unsigned golomb rice code (ffv1). - */ -static inline int get_ur_golomb(GetBitContext *gb, int k, int limit, - int esc_len) -{ - unsigned int buf; - int log; - - OPEN_READER(re, gb); - UPDATE_CACHE(re, gb); - buf = GET_CACHE(re, gb); - - log = av_log2(buf); - - if (log > 31 - limit) { - buf >>= log - k; - buf += (30 - log) << k; - LAST_SKIP_BITS(re, gb, 32 + k - log); - CLOSE_READER(re, gb); - - return buf; - } else { - LAST_SKIP_BITS(re, gb, limit); - UPDATE_CACHE(re, gb); - - buf = SHOW_UBITS(re, gb, esc_len); - - LAST_SKIP_BITS(re, gb, esc_len); - CLOSE_READER(re, gb); - - return buf + limit - 1; - } -} - -/** - * read unsigned golomb rice code (jpegls). - */ -static inline int get_ur_golomb_jpegls(GetBitContext *gb, int k, int limit, - int esc_len) -{ - unsigned int buf; - int log; - - OPEN_READER(re, gb); - UPDATE_CACHE(re, gb); - buf = GET_CACHE(re, gb); - - log = av_log2(buf); - - if (log - k >= 32 - MIN_CACHE_BITS + (MIN_CACHE_BITS == 32) && - 32 - log < limit) { - buf >>= log - k; - buf += (30 - log) << k; - LAST_SKIP_BITS(re, gb, 32 + k - log); - CLOSE_READER(re, gb); - - return buf; - } else { - int i; - for (i = 0; i < limit && SHOW_UBITS(re, gb, 1) == 0 && BITS_AVAILABLE(re, gb); i++) { - LAST_SKIP_BITS(re, gb, 1); - UPDATE_CACHE(re, gb); - } - SKIP_BITS(re, gb, 1); - - if (i < limit - 1) { - if (k) { - buf = SHOW_UBITS(re, gb, k); - LAST_SKIP_BITS(re, gb, k); - } else { - buf = 0; - } - - CLOSE_READER(re, gb); - return buf + (i << k); - } else if (i == limit - 1) { - buf = SHOW_UBITS(re, gb, esc_len); - LAST_SKIP_BITS(re, gb, esc_len); - CLOSE_READER(re, gb); - - return buf + 1; - } else - return -1; - } -} - -/** - * read signed golomb rice code (ffv1). - */ -static inline int get_sr_golomb(GetBitContext *gb, int k, int limit, - int esc_len) -{ - int v = get_ur_golomb(gb, k, limit, esc_len); - - v++; - if (v & 1) - return v >> 1; - else - return -(v >> 1); - -// return (v>>1) ^ -(v&1); -} - -/** - * read signed golomb rice code (flac). - */ -static inline int get_sr_golomb_flac(GetBitContext *gb, int k, int limit, - int esc_len) -{ - int v = get_ur_golomb_jpegls(gb, k, limit, esc_len); - return (v >> 1) ^ -(v & 1); -} - -/** - * read unsigned golomb rice code (shorten). - */ -static inline unsigned int get_ur_golomb_shorten(GetBitContext *gb, int k) -{ - return get_ur_golomb_jpegls(gb, k, INT_MAX, 0); -} - -/** - * read signed golomb rice code (shorten). - */ -static inline int get_sr_golomb_shorten(GetBitContext *gb, int k) -{ - int uvar = get_ur_golomb_jpegls(gb, k + 1, INT_MAX, 0); - if (uvar & 1) - return ~(uvar >> 1); - else - return uvar >> 1; -} - -#ifdef TRACE - -static inline int get_ue(GetBitContext *s, const char *file, const char *func, - int line) -{ - int show = show_bits(s, 24); - int pos = get_bits_count(s); - int i = get_ue_golomb(s); - int len = get_bits_count(s) - pos; - int bits = show >> (24 - len); - - av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d ue @%5d in %s %s:%d\n", - bits, len, i, pos, file, func, line); - - return i; -} - -static inline int get_se(GetBitContext *s, const char *file, const char *func, - int line) -{ - int show = show_bits(s, 24); - int pos = get_bits_count(s); - int i = get_se_golomb(s); - int len = get_bits_count(s) - pos; - int bits = show >> (24 - len); - - av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d se @%5d in %s %s:%d\n", - bits, len, i, pos, file, func, line); - - return i; -} - -static inline int get_te(GetBitContext *s, int r, char *file, const char *func, - int line) -{ - int show = show_bits(s, 24); - int pos = get_bits_count(s); - int i = get_te0_golomb(s, r); - int len = get_bits_count(s) - pos; - int bits = show >> (24 - len); - - av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d te @%5d in %s %s:%d\n", - bits, len, i, pos, file, func, line); - - return i; -} - -#define get_ue_golomb(a) get_ue(a, __FILE__, __func__, __LINE__) -#define get_se_golomb(a) get_se(a, __FILE__, __func__, __LINE__) -#define get_te_golomb(a, r) get_te(a, r, __FILE__, __func__, __LINE__) -#define get_te0_golomb(a, r) get_te(a, r, __FILE__, __func__, __LINE__) - -#endif /* TRACE */ - -/** - * write unsigned exp golomb code. - */ -static inline void set_ue_golomb(PutBitContext *pb, int i) -{ - assert(i >= 0); - - if (i < 256) - put_bits(pb, ff_ue_golomb_len[i], i + 1); - else { - int e = av_log2(i + 1); - put_bits(pb, 2 * e + 1, i + 1); - } -} - -/** - * write truncated unsigned exp golomb code. - */ -static inline void set_te_golomb(PutBitContext *pb, int i, int range) -{ - assert(range >= 1); - assert(i <= range); - - if (range == 2) - put_bits(pb, 1, i ^ 1); - else - set_ue_golomb(pb, i); -} - -/** - * write signed exp golomb code. 16 bits at most. - */ -static inline void set_se_golomb(PutBitContext *pb, int i) -{ - i = 2 * i - 1; - if (i < 0) - i ^= -1; //FIXME check if gcc does the right thing - set_ue_golomb(pb, i); -} - -/** - * write unsigned golomb rice code (ffv1). - */ -static inline void set_ur_golomb(PutBitContext *pb, int i, int k, int limit, - int esc_len) -{ - int e; - - assert(i >= 0); - - e = i >> k; - if (e < limit) - put_bits(pb, e + k + 1, (1 << k) + (i & ((1 << k) - 1))); - else - put_bits(pb, limit + esc_len, i - limit + 1); -} - -/** - * write unsigned golomb rice code (jpegls). - */ -static inline void set_ur_golomb_jpegls(PutBitContext *pb, int i, int k, - int limit, int esc_len) -{ - int e; - - assert(i >= 0); - - e = (i >> k) + 1; - if (e < limit) { - while (e > 31) { - put_bits(pb, 31, 0); - e -= 31; - } - put_bits(pb, e, 1); - if (k) - put_sbits(pb, k, i); - } else { - while (limit > 31) { - put_bits(pb, 31, 0); - limit -= 31; - } - put_bits(pb, limit, 1); - put_bits(pb, esc_len, i - 1); - } -} - -/** - * write signed golomb rice code (ffv1). - */ -static inline void set_sr_golomb(PutBitContext *pb, int i, int k, int limit, - int esc_len) -{ - int v; - - v = -2 * i - 1; - v ^= (v >> 31); - - set_ur_golomb(pb, v, k, limit, esc_len); -} - -/** - * write signed golomb rice code (flac). - */ -static inline void set_sr_golomb_flac(PutBitContext *pb, int i, int k, - int limit, int esc_len) -{ - int v; - - v = -2 * i - 1; - v ^= (v >> 31); - - set_ur_golomb_jpegls(pb, v, k, limit, esc_len); -} - -#endif /* AVCODEC_GOLOMB_H */ |