From 67f7ecf731d14f732db9d685aefd011f770d21a3 Mon Sep 17 00:00:00 2001 From: Mohamed Tarek Date: Thu, 29 Apr 2010 15:14:43 +0000 Subject: Revert r25739 which added libwmapro to apps/codecs, in preparation to commit the unmodified ffmpeg files first, for the sake of a consistent/complete svn history. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25758 a1c6a512-1295-4272-9138-f99709370657 --- apps/codecs/libwmapro/get_bits.h | 692 --------------------------------------- 1 file changed, 692 deletions(-) delete mode 100644 apps/codecs/libwmapro/get_bits.h (limited to 'apps/codecs/libwmapro/get_bits.h') diff --git a/apps/codecs/libwmapro/get_bits.h b/apps/codecs/libwmapro/get_bits.h deleted file mode 100644 index ca84ea61c0..0000000000 --- a/apps/codecs/libwmapro/get_bits.h +++ /dev/null @@ -1,692 +0,0 @@ -/* - * copyright (c) 2004 Michael Niedermayer - * - * 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/get_bits.h - * bitstream reader API header. - */ - -#ifndef AVCODEC_GET_BITS_H -#define AVCODEC_GET_BITS_H - -#include -#include -#include -#include "libavutil/bswap.h" -#include "libavutil/common.h" -#include "libavutil/intreadwrite.h" -#include "libavutil/log.h" -#include "mathops.h" - -#if defined(ALT_BITSTREAM_READER_LE) && !defined(ALT_BITSTREAM_READER) -# define ALT_BITSTREAM_READER -#endif - -#if !defined(LIBMPEG2_BITSTREAM_READER) && !defined(A32_BITSTREAM_READER) && !defined(ALT_BITSTREAM_READER) -# if ARCH_ARM && !HAVE_FAST_UNALIGNED -# define A32_BITSTREAM_READER -# else -# define ALT_BITSTREAM_READER -//#define LIBMPEG2_BITSTREAM_READER -//#define A32_BITSTREAM_READER -# endif -#endif - -/* bit input */ -/* buffer, buffer_end and size_in_bits must be present and used by every reader */ -typedef struct GetBitContext { - const uint8_t *buffer, *buffer_end; -#ifdef ALT_BITSTREAM_READER - int index; -#elif defined LIBMPEG2_BITSTREAM_READER - uint8_t *buffer_ptr; - uint32_t cache; - int bit_count; -#elif defined A32_BITSTREAM_READER - uint32_t *buffer_ptr; - uint32_t cache0; - uint32_t cache1; - int bit_count; -#endif - int size_in_bits; -} GetBitContext; - -#define VLC_TYPE int16_t - -typedef struct VLC { - int bits; - VLC_TYPE (*table)[2]; ///< code, bits - int table_size, table_allocated; -} VLC; - -typedef struct RL_VLC_ELEM { - int16_t level; - int8_t len; - uint8_t run; -} RL_VLC_ELEM; - -/* Bitstream reader API docs: -name - arbitrary name which is used as prefix for the internal variables - -gb - getbitcontext - -OPEN_READER(name, gb) - loads gb into local variables - -CLOSE_READER(name, gb) - stores local vars in gb - -UPDATE_CACHE(name, gb) - refills 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 bit (FIXME 64bit) - -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_CACHE(name, gb, num) - will remove the next num bits from the cache if it is needed for UPDATE_CACHE otherwise it will do nothing - -LAST_SKIP_BITS(name, gb, num) - is equivalent to LAST_SKIP_CACHE; SKIP_COUNTER - -for examples see get_bits, show_bits, skip_bits, get_vlc -*/ - -#ifdef ALT_BITSTREAM_READER -# define MIN_CACHE_BITS 25 - -# define OPEN_READER(name, gb)\ - unsigned int name##_index= (gb)->index;\ - int name##_cache= 0;\ - -# define CLOSE_READER(name, gb)\ - (gb)->index= name##_index;\ - -# ifdef ALT_BITSTREAM_READER_LE -# define UPDATE_CACHE(name, gb)\ - name##_cache= AV_RL32( ((const uint8_t *)(gb)->buffer)+(name##_index>>3) ) >> (name##_index&0x07);\ - -# define SKIP_CACHE(name, gb, num)\ - name##_cache >>= (num); -# else -# define UPDATE_CACHE(name, gb)\ - name##_cache= AV_RB32( ((const uint8_t *)(gb)->buffer)+(name##_index>>3) ) << (name##_index&0x07);\ - -# define SKIP_CACHE(name, gb, num)\ - name##_cache <<= (num); -# endif - -// FIXME name? -# define SKIP_COUNTER(name, gb, num)\ - name##_index += (num);\ - -# define SKIP_BITS(name, gb, num)\ - {\ - SKIP_CACHE(name, gb, num)\ - SKIP_COUNTER(name, gb, num)\ - }\ - -# define LAST_SKIP_BITS(name, gb, num) SKIP_COUNTER(name, gb, num) -# define LAST_SKIP_CACHE(name, gb, num) ; - -# ifdef ALT_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){ - s->index += n; -} - -#elif defined LIBMPEG2_BITSTREAM_READER -//libmpeg2 like reader - -# define MIN_CACHE_BITS 17 - -# define OPEN_READER(name, gb)\ - int name##_bit_count=(gb)->bit_count;\ - int name##_cache= (gb)->cache;\ - uint8_t * name##_buffer_ptr=(gb)->buffer_ptr;\ - -# define CLOSE_READER(name, gb)\ - (gb)->bit_count= name##_bit_count;\ - (gb)->cache= name##_cache;\ - (gb)->buffer_ptr= name##_buffer_ptr;\ - -# define UPDATE_CACHE(name, gb)\ - if(name##_bit_count >= 0){\ - name##_cache+= AV_RB16(name##_buffer_ptr) << name##_bit_count; \ - name##_buffer_ptr+=2;\ - name##_bit_count-= 16;\ - }\ - -# define SKIP_CACHE(name, gb, num)\ - name##_cache <<= (num);\ - -# define SKIP_COUNTER(name, gb, num)\ - name##_bit_count += (num);\ - -# define SKIP_BITS(name, gb, num)\ - {\ - SKIP_CACHE(name, gb, num)\ - SKIP_COUNTER(name, gb, num)\ - }\ - -# define LAST_SKIP_BITS(name, gb, num) SKIP_BITS(name, gb, num) -# define LAST_SKIP_CACHE(name, gb, num) SKIP_CACHE(name, gb, num) - -# define SHOW_UBITS(name, gb, num)\ - NEG_USR32(name##_cache, num) - -# define SHOW_SBITS(name, gb, num)\ - NEG_SSR32(name##_cache, num) - -# define GET_CACHE(name, gb)\ - ((uint32_t)name##_cache) - -static inline int get_bits_count(const GetBitContext *s){ - return (s->buffer_ptr - s->buffer)*8 - 16 + s->bit_count; -} - -static inline void skip_bits_long(GetBitContext *s, int n){ - OPEN_READER(re, s) - re_bit_count += n; - re_buffer_ptr += 2*(re_bit_count>>4); - re_bit_count &= 15; - re_cache = ((re_buffer_ptr[-2]<<8) + re_buffer_ptr[-1]) << (16+re_bit_count); - UPDATE_CACHE(re, s) - CLOSE_READER(re, s) -} - -#elif defined A32_BITSTREAM_READER - -# define MIN_CACHE_BITS 32 - -# define OPEN_READER(name, gb)\ - int name##_bit_count=(gb)->bit_count;\ - uint32_t name##_cache0= (gb)->cache0;\ - uint32_t name##_cache1= (gb)->cache1;\ - uint32_t * name##_buffer_ptr=(gb)->buffer_ptr;\ - -# define CLOSE_READER(name, gb)\ - (gb)->bit_count= name##_bit_count;\ - (gb)->cache0= name##_cache0;\ - (gb)->cache1= name##_cache1;\ - (gb)->buffer_ptr= name##_buffer_ptr;\ - -# define UPDATE_CACHE(name, gb)\ - if(name##_bit_count > 0){\ - const uint32_t next= be2me_32( *name##_buffer_ptr );\ - name##_cache0 |= NEG_USR32(next,name##_bit_count);\ - name##_cache1 |= next<buffer_ptr - s->buffer)*8 - 32 + s->bit_count; -} - -static inline void skip_bits_long(GetBitContext *s, int n){ - OPEN_READER(re, s) - re_bit_count += n; - re_buffer_ptr += re_bit_count>>5; - re_bit_count &= 31; - re_cache0 = be2me_32( re_buffer_ptr[-1] ) << re_bit_count; - re_cache1 = 0; - UPDATE_CACHE(re, s) - CLOSE_READER(re, s) -} - -#endif - -/** - * read mpeg1 dc style vlc (sign bit + mantisse with no MSB). - * if MSB not set it is negative - * @param n length in bits - * @author BERO - */ -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; -} - -/** - * reads 1-17 bits. - * Note, the alt bitstream reader can read up to 25 bits, but the libmpeg2 reader can't - */ -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; -} - -/** - * shows 1-17 bits. - * Note, the alt bitstream reader can read up to 25 bits, but the libmpeg2 reader can't - */ -static inline unsigned int show_bits(GetBitContext *s, int n){ - register int tmp; - OPEN_READER(re, s) - UPDATE_CACHE(re, s) - tmp= SHOW_UBITS(re, s, n); -// CLOSE_READER(re, s) - return tmp; -} - -static inline void skip_bits(GetBitContext *s, int n){ - //Note gcc seems to optimize this to s->index+=n for the ALT_READER :)) - 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){ -#ifdef ALT_BITSTREAM_READER - unsigned int index= s->index; - uint8_t result= s->buffer[ index>>3 ]; -#ifdef ALT_BITSTREAM_READER_LE - result>>= (index&0x07); - result&= 1; -#else - result<<= (index&0x07); - result>>= 8 - 1; -#endif - index++; - s->index= index; - - return result; -#else - return get_bits(s, 1); -#endif -} - -static inline unsigned int show_bits1(GetBitContext *s){ - return show_bits(s, 1); -} - -static inline void skip_bits1(GetBitContext *s){ - skip_bits(s, 1); -} - -/** - * reads 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 ALT_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 - } -} -#if 0 -/* mt : switched those off */ -/** - * reads 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); -} -#endif -/** - * shows 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); - } -} - -static inline int check_marker(GetBitContext *s, const char *msg) -{ - int bit= get_bits1(s); - if(!bit) - av_log(NULL, AV_LOG_INFO, "Marker bit missing %s\n", msg); - - return bit; -} - -/** - * init GetBitContext. - * @param buffer bitstream buffer, must be FF_INPUT_BUFFER_PADDING_SIZE bytes larger then 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 - * - * While GetBitContext stores the buffer size, for performance reasons you are - * responsible for checking for the buffer end yourself (take advantage of the padding)! - */ -static inline void init_get_bits(GetBitContext *s, - const uint8_t *buffer, int bit_size) -{ - int buffer_size= (bit_size+7)>>3; - if(buffer_size < 0 || bit_size < 0) { - buffer_size = bit_size = 0; - buffer = NULL; - } - - s->buffer= buffer; - s->size_in_bits= bit_size; - s->buffer_end= buffer + buffer_size; -#ifdef ALT_BITSTREAM_READER - s->index=0; -#elif defined LIBMPEG2_BITSTREAM_READER - s->buffer_ptr = (uint8_t*)((intptr_t)buffer&(~1)); - s->bit_count = 16 + 8*((intptr_t)buffer&1); - skip_bits_long(s, 0); -#elif defined A32_BITSTREAM_READER - s->buffer_ptr = (uint32_t*)((intptr_t)buffer&(~3)); - s->bit_count = 32 + 8*((intptr_t)buffer&3); - skip_bits_long(s, 0); -#endif -} - -static inline void align_get_bits(GetBitContext *s) -{ - int n= (-get_bits_count(s)) & 7; - if(n) skip_bits(s, n); -} - -#define init_vlc(vlc, nb_bits, nb_codes,\ - bits, bits_wrap, bits_size,\ - codes, codes_wrap, codes_size,\ - flags)\ - init_vlc_sparse(vlc, nb_bits, nb_codes,\ - bits, bits_wrap, bits_size,\ - codes, codes_wrap, codes_size,\ - NULL, 0, 0, flags) - -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); -#define INIT_VLC_LE 2 -#define INIT_VLC_USE_NEW_STATIC 4 -void free_vlc(VLC *vlc); - -#define INIT_VLC_STATIC(vlc, bits, a,b,c,d,e,f,g, static_size)\ -{\ - static VLC_TYPE table[static_size][2];\ - (vlc)->table= table;\ - (vlc)->table_allocated= static_size;\ - init_vlc(vlc, bits, a,b,c,d,e,f,g, INIT_VLC_USE_NEW_STATIC);\ -} - - -/** - * - * 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)\ -{\ - 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)\ -} - -#define GET_RL_VLC(level, run, name, gb, table, bits, max_depth, need_update)\ -{\ - 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;\ - }\ - run= table[index].run;\ - SKIP_BITS(name, gb, n)\ -} - - -/** - * parses a vlc code, faster then get_vlc() - * @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; -} - -//#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, 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, 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, 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__) - -#define tprintf(p, ...) av_log(p, AV_LOG_DEBUG, __VA_ARGS__) - -#else //TRACE -#define tprintf(p, ...) {} -#endif - -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); -} - -#endif /* AVCODEC_GET_BITS_H */ -- cgit v1.2.3