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Diffstat (limited to 'apps/codecs/libwmapro/bitstream.c')
-rw-r--r--apps/codecs/libwmapro/bitstream.c358
1 files changed, 0 insertions, 358 deletions
diff --git a/apps/codecs/libwmapro/bitstream.c b/apps/codecs/libwmapro/bitstream.c
deleted file mode 100644
index 142ffa7..0000000
--- a/apps/codecs/libwmapro/bitstream.c
+++ /dev/null
@@ -1,358 +0,0 @@
-/*
- * Common bit i/o utils
- * Copyright (c) 2000, 2001 Fabrice Bellard
- * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
- * Copyright (c) 2010 Loren Merritt
- *
- * alternative bitstream reader & writer by 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 libavcodec/bitstream.c
- * bitstream api.
- */
-
-#include "get_bits.h"
-#include "put_bits.h"
-#include <string.h>
-
-#define av_log(...)
-
-/* Taken from libavutil/common.h */
-#define FFMIN(a,b) ((a) > (b) ? (b) : (a))
-#define FFMAX(a,b) ((a) > (b) ? (a) : (b))
-
-/* av_reverse - taken from libavutil/mathematics.c*/
-const uint8_t av_reverse[256]={
-0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,
-0x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,
-0x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,
-0x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,
-0x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,
-0x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,
-0x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,
-0x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,
-0x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,
-0x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,
-0x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,
-0x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,
-0x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,
-0x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,
-0x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,
-0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,
-};
-
-
-const uint8_t ff_log2_run[32]={
- 0, 0, 0, 0, 1, 1, 1, 1,
- 2, 2, 2, 2, 3, 3, 3, 3,
- 4, 4, 5, 5, 6, 6, 7, 7,
- 8, 9,10,11,12,13,14,15
-};
-
-void align_put_bits(PutBitContext *s)
-{
-#ifdef ALT_BITSTREAM_WRITER
- put_bits(s,( - s->index) & 7,0);
-#else
- put_bits(s,s->bit_left & 7,0);
-#endif
-}
-
-void ff_put_string(PutBitContext *pb, const char *string, int terminate_string)
-{
- while(*string){
- put_bits(pb, 8, *string);
- string++;
- }
- if(terminate_string)
- put_bits(pb, 8, 0);
-}
-
-void ff_copy_bits(PutBitContext *pb, const uint8_t *src, int length)
-{
- int words= length>>4;
- int bits= length&15;
- int i;
-
- if(length==0) return;
-/* The following define was just added to make the codec (wma pro) compile */
-#define CONFIG_SMALL 0
- if(CONFIG_SMALL || words < 16 || put_bits_count(pb)&7){
- for(i=0; i<words; i++) put_bits(pb, 16, AV_RB16(src + 2*i));
- }else{
- for(i=0; put_bits_count(pb)&31; i++)
- put_bits(pb, 8, src[i]);
- flush_put_bits(pb);
- memcpy(put_bits_ptr(pb), src+i, 2*words-i);
- skip_put_bytes(pb, 2*words-i);
- }
-
- put_bits(pb, bits, AV_RB16(src + 2*words)>>(16-bits));
-}
-
-/* VLC decoding */
-
-//#define DEBUG_VLC
-
-#define GET_DATA(v, table, i, wrap, size) \
-{\
- const uint8_t *ptr = (const uint8_t *)table + i * wrap;\
- switch(size) {\
- case 1:\
- v = *(const uint8_t *)ptr;\
- break;\
- case 2:\
- v = *(const uint16_t *)ptr;\
- break;\
- default:\
- v = *(const uint32_t *)ptr;\
- break;\
- }\
-}
-
-
-static int alloc_table(VLC *vlc, int size, int use_static)
-{
- int index;
- index = vlc->table_size;
- vlc->table_size += size;
- if (vlc->table_size > vlc->table_allocated) {
- if(use_static)
- return -1; //cant do anything, init_vlc() is used with too little memory
- vlc->table_allocated += (1 << vlc->bits);
- //vlc->table = av_realloc(vlc->table,
- // sizeof(VLC_TYPE) * 2 * vlc->table_allocated);
- if (!vlc->table)
- return -1;
- }
- return index;
-}
-
-static inline uint32_t bitswap_32(uint32_t x) {
- return av_reverse[x&0xFF]<<24
- | av_reverse[(x>>8)&0xFF]<<16
- | av_reverse[(x>>16)&0xFF]<<8
- | av_reverse[x>>24];
-}
-
-typedef struct {
- uint8_t bits;
- uint16_t symbol;
- /** codeword, with the first bit-to-be-read in the msb
- * (even if intended for a little-endian bitstream reader) */
- uint32_t code;
-} VLCcode;
-
-static int compare_vlcspec(const void *a, const void *b)
-{
- const VLCcode *sa=a, *sb=b;
- return (sa->code >> 1) - (sb->code >> 1);
-}
-
-/**
- * Build VLC decoding tables suitable for use with get_vlc().
- *
- * @param vlc the context to be initted
- *
- * @param table_nb_bits max length of vlc codes to store directly in this table
- * (Longer codes are delegated to subtables.)
- *
- * @param nb_codes number of elements in codes[]
- *
- * @param codes descriptions of the vlc codes
- * These must be ordered such that codes going into the same subtable are contiguous.
- * Sorting by VLCcode.code is sufficient, though not necessary.
- */
-static int build_table(VLC *vlc, int table_nb_bits, int nb_codes,
- VLCcode *codes, int flags)
-{
- int table_size, table_index, index, code_prefix, symbol, subtable_bits;
- int i, j, k, n, nb, inc;
- uint32_t code;
- VLC_TYPE (*table)[2];
-
- table_size = 1 << table_nb_bits;
- table_index = alloc_table(vlc, table_size, flags & INIT_VLC_USE_NEW_STATIC);
-#ifdef DEBUG_VLC
- av_log(NULL,AV_LOG_DEBUG,"new table index=%d size=%d\n",
- table_index, table_size);
-#endif
- if (table_index < 0)
- return -1;
- table = &vlc->table[table_index];
-
- for (i = 0; i < table_size; i++) {
- table[i][1] = 0; //bits
- table[i][0] = -1; //codes
- }
-
- /* first pass: map codes and compute auxillary table sizes */
- for (i = 0; i < nb_codes; i++) {
- n = codes[i].bits;
- code = codes[i].code;
- symbol = codes[i].symbol;
-#if defined(DEBUG_VLC) && 0
- av_log(NULL,AV_LOG_DEBUG,"i=%d n=%d code=0x%x\n", i, n, code);
-#endif
- if (n <= table_nb_bits) {
- /* no need to add another table */
- j = code >> (32 - table_nb_bits);
- nb = 1 << (table_nb_bits - n);
- inc = 1;
- if (flags & INIT_VLC_LE) {
- j = bitswap_32(code);
- inc = 1 << n;
- }
- for (k = 0; k < nb; k++) {
-#ifdef DEBUG_VLC
- av_log(NULL, AV_LOG_DEBUG, "%4x: code=%d n=%d\n",
- j, i, n);
-#endif
- if (table[j][1] /*bits*/ != 0) {
- av_log(NULL, AV_LOG_ERROR, "incorrect codes\n");
- return -1;
- }
- table[j][1] = n; //bits
- table[j][0] = symbol;
- j += inc;
- }
- } else {
- /* fill auxiliary table recursively */
- n -= table_nb_bits;
- code_prefix = code >> (32 - table_nb_bits);
- subtable_bits = n;
- codes[i].bits = n;
- codes[i].code = code << table_nb_bits;
- for (k = i+1; k < nb_codes; k++) {
- n = codes[k].bits - table_nb_bits;
- if (n <= 0)
- break;
- code = codes[k].code;
- if (code >> (32 - table_nb_bits) != (unsigned)code_prefix)
- break;
- codes[k].bits = n;
- codes[k].code = code << table_nb_bits;
- subtable_bits = FFMAX(subtable_bits, n);
- }
- subtable_bits = FFMIN(subtable_bits, table_nb_bits);
- j = (flags & INIT_VLC_LE) ? bitswap_32(code_prefix) >> (32 - table_nb_bits) : (unsigned)code_prefix;
- table[j][1] = -subtable_bits;
-#ifdef DEBUG_VLC
- av_log(NULL,AV_LOG_DEBUG,"%4x: n=%d (subtable)\n",
- j, codes[i].bits + table_nb_bits);
-#endif
- index = build_table(vlc, subtable_bits, k-i, codes+i, flags);
- if (index < 0)
- return -1;
- /* note: realloc has been done, so reload tables */
- table = &vlc->table[table_index];
- table[j][0] = index; //code
- i = k-1;
- }
- }
- return table_index;
-}
-
-
-/* Build VLC decoding tables suitable for use with get_vlc().
-
- 'nb_bits' set thee decoding table size (2^nb_bits) entries. The
- bigger it is, the faster is the decoding. But it should not be too
- big to save memory and L1 cache. '9' is a good compromise.
-
- 'nb_codes' : number of vlcs codes
-
- 'bits' : table which gives the size (in bits) of each vlc code.
-
- 'codes' : table which gives the bit pattern of of each vlc code.
-
- 'symbols' : table which gives the values to be returned from get_vlc().
-
- 'xxx_wrap' : give the number of bytes between each entry of the
- 'bits' or 'codes' tables.
-
- 'xxx_size' : gives the number of bytes of each entry of the 'bits'
- or 'codes' tables.
-
- 'wrap' and 'size' allows to use any memory configuration and types
- (byte/word/long) to store the 'bits', 'codes', and 'symbols' tables.
-
- 'use_static' should be set to 1 for tables, which should be freed
- with av_free_static(), 0 if free_vlc() will be used.
-*/
-int init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes,
- const void *bits, int bits_wrap, int bits_size,
- const void *codes, int codes_wrap, int codes_size,
- const void *symbols, int symbols_wrap, int symbols_size,
- int flags)
-{
- VLCcode buf[nb_codes];
- int i, j;
-
- vlc->bits = nb_bits;
- if(flags & INIT_VLC_USE_NEW_STATIC){
- if(vlc->table_size && vlc->table_size == vlc->table_allocated){
- return 0;
- }else if(vlc->table_size){
- return -1; // fatal error, we are called on a partially initialized table
- }
- }else {
- vlc->table = NULL;
- vlc->table_allocated = 0;
- vlc->table_size = 0;
- }
-
-#ifdef DEBUG_VLC
- av_log(NULL,AV_LOG_DEBUG,"build table nb_codes=%d\n", nb_codes);
-#endif
-
- //assert(symbols_size <= 2 || !symbols);
- j = 0;
-#define COPY(condition)\
- for (i = 0; i < nb_codes; i++) {\
- GET_DATA(buf[j].bits, bits, i, bits_wrap, bits_size);\
- if (!(condition))\
- continue;\
- GET_DATA(buf[j].code, codes, i, codes_wrap, codes_size);\
- if (flags & INIT_VLC_LE)\
- buf[j].code = bitswap_32(buf[j].code);\
- else\
- buf[j].code <<= 32 - buf[j].bits;\
- if (symbols)\
- GET_DATA(buf[j].symbol, symbols, i, symbols_wrap, symbols_size)\
- else\
- buf[j].symbol = i;\
- j++;\
- }
- COPY(buf[j].bits > nb_bits);
- // qsort is the slowest part of init_vlc, and could probably be improved or avoided
- qsort(buf, j, sizeof(VLCcode), compare_vlcspec);
- COPY(buf[j].bits && buf[j].bits <= nb_bits);
- nb_codes = j;
-
- if (build_table(vlc, nb_bits, nb_codes, buf, flags) < 0) {
- //av_freep(&vlc->table);
- return -1;
- }
- //if((flags & INIT_VLC_USE_NEW_STATIC) && vlc->table_size != vlc->table_allocated)
- // av_log(NULL, AV_LOG_ERROR, "needed %d had %d\n", vlc->table_size, vlc->table_allocated);
- return 0;
-}
-
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