[FFmpeg-cvslog] r10240 - in trunk/libavcodec: bitstream.h unary.h vc1.c wavpack.c
aurel
subversion
Mon Aug 27 00:33:48 CEST 2007
Author: aurel
Date: Mon Aug 27 00:33:48 2007
New Revision: 10240
Log:
move get_unary() to it's own file
Added:
trunk/libavcodec/unary.h
- copied, changed from r10237, /trunk/libavcodec/bitstream.h
Modified:
trunk/libavcodec/bitstream.h
trunk/libavcodec/vc1.c
trunk/libavcodec/wavpack.c
Modified: trunk/libavcodec/bitstream.h
==============================================================================
--- trunk/libavcodec/bitstream.h (original)
+++ trunk/libavcodec/bitstream.h Mon Aug 27 00:33:48 2007
@@ -950,50 +950,4 @@ static inline int decode012(GetBitContex
return get_bits1(gb) + 1;
}
-/**
- * Get unary code of limited length
- * @todo FIXME Slow and ugly
- * @param gb GetBitContext
- * @param[in] stop The bitstop value (unary code of 1's or 0's)
- * @param[in] len Maximum length
- * @return Unary length/index
- */
-static int get_unary(GetBitContext *gb, int stop, int len)
-{
-#if 1
- int i;
-
- for(i = 0; i < len && get_bits1(gb) != stop; i++);
- return i;
-/* int i = 0, tmp = !stop;
-
- while (i != len && tmp != stop)
- {
- tmp = get_bits(gb, 1);
- i++;
- }
- if (i == len && tmp != stop) return len+1;
- return i;*/
-#else
- unsigned int buf;
- int log;
-
- OPEN_READER(re, gb);
- UPDATE_CACHE(re, gb);
- buf=GET_CACHE(re, gb); //Still not sure
- if (stop) buf = ~buf;
-
- log= av_log2(-buf); //FIXME: -?
- if (log < limit){
- LAST_SKIP_BITS(re, gb, log+1);
- CLOSE_READER(re, gb);
- return log;
- }
-
- LAST_SKIP_BITS(re, gb, limit);
- CLOSE_READER(re, gb);
- return limit;
-#endif
-}
-
#endif /* BITSTREAM_H */
Copied: trunk/libavcodec/unary.h (from r10237, /trunk/libavcodec/bitstream.h)
==============================================================================
--- /trunk/libavcodec/bitstream.h (original)
+++ trunk/libavcodec/unary.h Mon Aug 27 00:33:48 2007
@@ -18,937 +18,10 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-/**
- * @file bitstream.h
- * bitstream api header.
- */
-
-#ifndef BITSTREAM_H
-#define BITSTREAM_H
-
-#include <stdint.h>
-#include <stdlib.h>
-#include <assert.h>
-#include "common.h"
-#include "bswap.h"
-#include "intreadwrite.h"
-#include "log.h"
-
-#if defined(ALT_BITSTREAM_READER_LE) && !defined(ALT_BITSTREAM_READER)
-# define ALT_BITSTREAM_READER
-#endif
-
-//#define ALT_BITSTREAM_WRITER
-//#define ALIGNED_BITSTREAM_WRITER
-#if !defined(LIBMPEG2_BITSTREAM_READER) && !defined(A32_BITSTREAM_READER) && !defined(ALT_BITSTREAM_READER)
-# ifdef ARCH_ARMV4L
-# define A32_BITSTREAM_READER
-# else
-# define ALT_BITSTREAM_READER
-//#define LIBMPEG2_BITSTREAM_READER
-//#define A32_BITSTREAM_READER
-# endif
-#endif
-#define LIBMPEG2_BITSTREAM_READER_HACK //add BERO
-
-extern const uint8_t ff_reverse[256];
-
-#if defined(ARCH_X86)
-// avoid +32 for shift optimization (gcc should do that ...)
-static inline int32_t NEG_SSR32( int32_t a, int8_t s){
- asm ("sarl %1, %0\n\t"
- : "+r" (a)
- : "ic" ((uint8_t)(-s))
- );
- return a;
-}
-static inline uint32_t NEG_USR32(uint32_t a, int8_t s){
- asm ("shrl %1, %0\n\t"
- : "+r" (a)
- : "ic" ((uint8_t)(-s))
- );
- return a;
-}
-#else
-# define NEG_SSR32(a,s) ((( int32_t)(a))>>(32-(s)))
-# define NEG_USR32(a,s) (((uint32_t)(a))>>(32-(s)))
-#endif
-
-/* bit output */
-
-/* buf and buf_end must be present and used by every alternative writer. */
-typedef struct PutBitContext {
-#ifdef ALT_BITSTREAM_WRITER
- uint8_t *buf, *buf_end;
- int index;
-#else
- uint32_t bit_buf;
- int bit_left;
- uint8_t *buf, *buf_ptr, *buf_end;
-#endif
-} PutBitContext;
-
-static inline void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
-{
- if(buffer_size < 0) {
- buffer_size = 0;
- buffer = NULL;
- }
-
- s->buf = buffer;
- s->buf_end = s->buf + buffer_size;
-#ifdef ALT_BITSTREAM_WRITER
- s->index=0;
- ((uint32_t*)(s->buf))[0]=0;
-// memset(buffer, 0, buffer_size);
-#else
- s->buf_ptr = s->buf;
- s->bit_left=32;
- s->bit_buf=0;
-#endif
-}
-
-/* return the number of bits output */
-static inline int put_bits_count(PutBitContext *s)
-{
-#ifdef ALT_BITSTREAM_WRITER
- return s->index;
-#else
- return (s->buf_ptr - s->buf) * 8 + 32 - s->bit_left;
-#endif
-}
-
-/* pad the end of the output stream with zeros */
-static inline void flush_put_bits(PutBitContext *s)
-{
-#ifdef ALT_BITSTREAM_WRITER
- align_put_bits(s);
-#else
- s->bit_buf<<= s->bit_left;
- while (s->bit_left < 32) {
- /* XXX: should test end of buffer */
- *s->buf_ptr++=s->bit_buf >> 24;
- s->bit_buf<<=8;
- s->bit_left+=8;
- }
- s->bit_left=32;
- s->bit_buf=0;
-#endif
-}
-
-void align_put_bits(PutBitContext *s);
-void ff_put_string(PutBitContext * pbc, char *s, int put_zero);
-void ff_copy_bits(PutBitContext *pb, uint8_t *src, int length);
-
-/* 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;
-
-#if defined(ARCH_SPARC) || defined(ARCH_ARMV4L) || defined(ARCH_MIPS) || defined(ARCH_BFIN)
-#define UNALIGNED_STORES_ARE_BAD
-#endif
-
-/* used to avoid misaligned exceptions on some archs (alpha, ...) */
-#if defined(ARCH_X86)
-# define unaligned16(a) (*(const uint16_t*)(a))
-# define unaligned32(a) (*(const uint32_t*)(a))
-# define unaligned64(a) (*(const uint64_t*)(a))
-#else
-# ifdef __GNUC__
-# define unaligned(x) \
-static inline uint##x##_t unaligned##x(const void *v) { \
- struct Unaligned { \
- uint##x##_t i; \
- } __attribute__((packed)); \
- \
- return ((const struct Unaligned *) v)->i; \
-}
-# elif defined(__DECC)
-# define unaligned(x) \
-static inline uint##x##_t unaligned##x(const void *v) { \
- return *(const __unaligned uint##x##_t *) v; \
-}
-# else
-# define unaligned(x) \
-static inline uint##x##_t unaligned##x(const void *v) { \
- return *(const uint##x##_t *) v; \
-}
-# endif
-unaligned(16)
-unaligned(32)
-unaligned(64)
-#undef unaligned
-#endif /* defined(ARCH_X86) */
-
-#ifndef ALT_BITSTREAM_WRITER
-static inline void put_bits(PutBitContext *s, int n, unsigned int value)
-{
- unsigned int bit_buf;
- int bit_left;
-
- // printf("put_bits=%d %x\n", n, value);
- assert(n == 32 || value < (1U << n));
-
- bit_buf = s->bit_buf;
- bit_left = s->bit_left;
-
- // printf("n=%d value=%x cnt=%d buf=%x\n", n, value, bit_cnt, bit_buf);
- /* XXX: optimize */
- if (n < bit_left) {
- bit_buf = (bit_buf<<n) | value;
- bit_left-=n;
- } else {
- bit_buf<<=bit_left;
- bit_buf |= value >> (n - bit_left);
-#ifdef UNALIGNED_STORES_ARE_BAD
- if (3 & (intptr_t) s->buf_ptr) {
- s->buf_ptr[0] = bit_buf >> 24;
- s->buf_ptr[1] = bit_buf >> 16;
- s->buf_ptr[2] = bit_buf >> 8;
- s->buf_ptr[3] = bit_buf ;
- } else
-#endif
- *(uint32_t *)s->buf_ptr = be2me_32(bit_buf);
- //printf("bitbuf = %08x\n", bit_buf);
- s->buf_ptr+=4;
- bit_left+=32 - n;
- bit_buf = value;
- }
-
- s->bit_buf = bit_buf;
- s->bit_left = bit_left;
-}
-#endif
-
-
-#ifdef ALT_BITSTREAM_WRITER
-static inline void put_bits(PutBitContext *s, int n, unsigned int value)
-{
-# ifdef ALIGNED_BITSTREAM_WRITER
-# if defined(ARCH_X86)
- asm volatile(
- "movl %0, %%ecx \n\t"
- "xorl %%eax, %%eax \n\t"
- "shrdl %%cl, %1, %%eax \n\t"
- "shrl %%cl, %1 \n\t"
- "movl %0, %%ecx \n\t"
- "shrl $3, %%ecx \n\t"
- "andl $0xFFFFFFFC, %%ecx \n\t"
- "bswapl %1 \n\t"
- "orl %1, (%2, %%ecx) \n\t"
- "bswapl %%eax \n\t"
- "addl %3, %0 \n\t"
- "movl %%eax, 4(%2, %%ecx) \n\t"
- : "=&r" (s->index), "=&r" (value)
- : "r" (s->buf), "r" (n), "0" (s->index), "1" (value<<(-n))
- : "%eax", "%ecx"
- );
-# else
- int index= s->index;
- uint32_t *ptr= ((uint32_t *)s->buf)+(index>>5);
-
- value<<= 32-n;
-
- ptr[0] |= be2me_32(value>>(index&31));
- ptr[1] = be2me_32(value<<(32-(index&31)));
-//if(n>24) printf("%d %d\n", n, value);
- index+= n;
- s->index= index;
-# endif
-# else //ALIGNED_BITSTREAM_WRITER
-# if defined(ARCH_X86)
- asm volatile(
- "movl $7, %%ecx \n\t"
- "andl %0, %%ecx \n\t"
- "addl %3, %%ecx \n\t"
- "negl %%ecx \n\t"
- "shll %%cl, %1 \n\t"
- "bswapl %1 \n\t"
- "movl %0, %%ecx \n\t"
- "shrl $3, %%ecx \n\t"
- "orl %1, (%%ecx, %2) \n\t"
- "addl %3, %0 \n\t"
- "movl $0, 4(%%ecx, %2) \n\t"
- : "=&r" (s->index), "=&r" (value)
- : "r" (s->buf), "r" (n), "0" (s->index), "1" (value)
- : "%ecx"
- );
-# else
- int index= s->index;
- uint32_t *ptr= (uint32_t*)(((uint8_t *)s->buf)+(index>>3));
-
- ptr[0] |= be2me_32(value<<(32-n-(index&7) ));
- ptr[1] = 0;
-//if(n>24) printf("%d %d\n", n, value);
- index+= n;
- s->index= index;
-# endif
-# endif //!ALIGNED_BITSTREAM_WRITER
-}
-#endif
-
-
-static inline uint8_t* pbBufPtr(PutBitContext *s)
-{
-#ifdef ALT_BITSTREAM_WRITER
- return s->buf + (s->index>>3);
-#else
- return s->buf_ptr;
-#endif
-}
-
-/**
- *
- * PutBitContext must be flushed & aligned to a byte boundary before calling this.
- */
-static inline void skip_put_bytes(PutBitContext *s, int n){
- assert((put_bits_count(s)&7)==0);
-#ifdef ALT_BITSTREAM_WRITER
- FIXME may need some cleaning of the buffer
- s->index += n<<3;
-#else
- assert(s->bit_left==32);
- s->buf_ptr += n;
-#endif
-}
-
-/**
- * Skips the given number of bits.
- * Must only be used if the actual values in the bitstream do not matter.
- */
-static inline void skip_put_bits(PutBitContext *s, int n){
-#ifdef ALT_BITSTREAM_WRITER
- s->index += n;
-#else
- s->bit_left -= n;
- s->buf_ptr-= s->bit_left>>5;
- s->bit_left &= 31;
-#endif
-}
-
-/**
- * Changes the end of the buffer.
- */
-static inline void set_put_bits_buffer_size(PutBitContext *s, int size){
- s->buf_end= s->buf + size;
-}
-
-/* Bitstream reader API docs:
-name
- abritary 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 SKIP_LAST_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)\
- 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)\
- ((name##_cache) & (NEG_USR32(0xffffffff,num)))
-
-# define SHOW_SBITS(name, gb, num)\
- NEG_SSR32((name##_cache)<<(32-(num)), 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(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;\
-
-#ifdef LIBMPEG2_BITSTREAM_READER_HACK
-
-# define UPDATE_CACHE(name, gb)\
- if(name##_bit_count >= 0){\
- name##_cache+= (int)be2me_16(*(uint16_t*)name##_buffer_ptr) << name##_bit_count;\
- name##_buffer_ptr += 2;\
- name##_bit_count-= 16;\
- }\
-
-#else
-
-# define UPDATE_CACHE(name, gb)\
- if(name##_bit_count >= 0){\
- name##_cache+= ((name##_buffer_ptr[0]<<8) + name##_buffer_ptr[1]) << name##_bit_count;\
- name##_buffer_ptr+=2;\
- name##_bit_count-= 16;\
- }\
-
-#endif
-
-# 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(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<<name##_bit_count;\
- name##_buffer_ptr++;\
- name##_bit_count-= 32;\
- }\
-
-#if defined(ARCH_X86)
-# define SKIP_CACHE(name, gb, num)\
- asm(\
- "shldl %2, %1, %0 \n\t"\
- "shll %2, %1 \n\t"\
- : "+r" (name##_cache0), "+r" (name##_cache1)\
- : "Ic" ((uint8_t)(num))\
- );
-#else
-# define SKIP_CACHE(name, gb, num)\
- name##_cache0 <<= (num);\
- name##_cache0 |= NEG_USR32(name##_cache1,num);\
- name##_cache1 <<= (num);
-#endif
-
-# 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##_cache0, num)
-
-# define SHOW_SBITS(name, gb, num)\
- NEG_SSR32(name##_cache0, num)
-
-# define GET_CACHE(name, gb)\
- (name##_cache0)
-
-static inline int get_bits_count(GetBitContext *s){
- return ((uint8_t*)s->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
- 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<=17) 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
- }
-}
-
-/**
- * shows 0-32 bits.
- */
-static inline unsigned int show_bits_long(GetBitContext *s, int n){
- if(n<=17) return show_bits(s, n);
- else{
- GetBitContext gb= *s;
- int ret= get_bits_long(s, n);
- *s= gb;
- return ret;
- }
-}
-
-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
- */
-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_USE_STATIC 1
-#define INIT_VLC_LE 2
-void free_vlc(VLC *vlc);
-
-/**
- *
- * if the vlc code is invalid and max_depth=1 than no bits will be removed
- * if the vlc code is invalid and max_depth>1 than the number of bits removed
- * is undefined
- */
-#define GET_VLC(code, name, gb, table, bits, max_depth)\
-{\
- int n, index, nb_bits;\
-\
- 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, index, nb_bits;\
-\
- 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
+#ifndef AVCODEC_UNARY_H
+#define AVCODEC_UNARY_H
-static inline int decode012(GetBitContext *gb){
- int n;
- n = get_bits1(gb);
- if (n == 0)
- return 0;
- else
- return get_bits1(gb) + 1;
-}
+#include "bitstream.h"
/**
* Get unary code of limited length
@@ -996,4 +69,4 @@ static int get_unary(GetBitContext *gb,
#endif
}
-#endif /* BITSTREAM_H */
+#endif /* AVCODEC_UNARY_H */
Modified: trunk/libavcodec/vc1.c
==============================================================================
--- trunk/libavcodec/vc1.c (original)
+++ trunk/libavcodec/vc1.c Mon Aug 27 00:33:48 2007
@@ -32,6 +32,7 @@
#include "vc1data.h"
#include "vc1acdata.h"
#include "msmpeg4data.h"
+#include "unary.h"
#undef NDEBUG
#include <assert.h>
Modified: trunk/libavcodec/wavpack.c
==============================================================================
--- trunk/libavcodec/wavpack.c (original)
+++ trunk/libavcodec/wavpack.c Mon Aug 27 00:33:48 2007
@@ -21,6 +21,7 @@
#define ALT_BITSTREAM_READER_LE
#include "avcodec.h"
#include "bitstream.h"
+#include "unary.h"
/**
* @file wavpack.c
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