/** * @file common.h * common internal api header. */ #ifndef COMMON_H #define COMMON_H #if defined(WIN32) && !defined(__MINGW32__) && !defined(__CYGWIN__) # define CONFIG_WIN32 #endif //#define ALT_BITSTREAM_WRITER //#define ALIGNED_BITSTREAM_WRITER #define ALT_BITSTREAM_READER //#define LIBMPEG2_BITSTREAM_READER //#define A32_BITSTREAM_READER #define LIBMPEG2_BITSTREAM_READER_HACK //add BERO #ifndef M_PI #define M_PI 3.14159265358979323846 #endif #ifdef HAVE_AV_CONFIG_H /* only include the following when compiling package */ # include "config.h" # include <stdlib.h> # include <stdio.h> # include <string.h> # include <ctype.h> # ifndef __BEOS__ # include <errno.h> # else # include "berrno.h" # endif # include <math.h> # ifndef ENODATA # define ENODATA 61 # endif #include <stddef.h> #ifndef offsetof # define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F)) #endif #define AVOPTION_CODEC_BOOL(name, help, field) \ { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_BOOL } #define AVOPTION_CODEC_DOUBLE(name, help, field, minv, maxv, defval) \ { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_DOUBLE, minv, maxv, defval } #define AVOPTION_CODEC_FLAG(name, help, field, flag, defval) \ { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_FLAG, flag, 0, defval } #define AVOPTION_CODEC_INT(name, help, field, minv, maxv, defval) \ { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_INT, minv, maxv, defval } #define AVOPTION_CODEC_STRING(name, help, field, str, val) \ { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_STRING, .defval = val, .defstr = str } #define AVOPTION_CODEC_RCOVERRIDE(name, help, field) \ { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_RCOVERRIDE, .defval = 0, .defstr = NULL } #define AVOPTION_SUB(ptr) { .name = NULL, .help = (const char*)ptr } #define AVOPTION_END() AVOPTION_SUB(NULL) struct AVOption; #ifdef HAVE_MMX extern const struct AVOption avoptions_common[3 + 5]; #else extern const struct AVOption avoptions_common[3]; #endif extern const struct AVOption avoptions_workaround_bug[11]; #endif /* HAVE_AV_CONFIG_H */ /* Suppress restrict if it was not defined in config.h. */ #ifndef restrict # define restrict #endif #if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0) # define always_inline __attribute__((always_inline)) inline #else # define always_inline inline #endif #if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0) # define attribute_used __attribute__((used)) #else # define attribute_used #endif #ifndef EMULATE_INTTYPES # include <inttypes.h> #else typedef signed char int8_t; typedef signed short int16_t; typedef signed int int32_t; typedef unsigned char uint8_t; typedef unsigned short uint16_t; typedef unsigned int uint32_t; # ifdef CONFIG_WIN32 typedef signed __int64 int64_t; typedef unsigned __int64 uint64_t; # else /* other OS */ typedef signed long long int64_t; typedef unsigned long long uint64_t; # endif /* other OS */ #endif /* HAVE_INTTYPES_H */ #ifndef INT64_MAX #define INT64_MAX int64_t_C(9223372036854775807) #endif #ifdef EMULATE_FAST_INT /* note that we don't emulate 64bit ints */ typedef signed char int_fast8_t; typedef signed int int_fast16_t; typedef signed int int_fast32_t; typedef unsigned char uint_fast8_t; typedef unsigned int uint_fast16_t; typedef unsigned int uint_fast32_t; #endif #if defined(CONFIG_OS2) || defined(CONFIG_SUNOS) static inline float floorf(float f) { return floor(f); } #endif #ifdef CONFIG_WIN32 /* windows */ # ifndef __MINGW32__ # define int64_t_C(c) (c ## i64) # define uint64_t_C(c) (c ## i64) # ifdef HAVE_AV_CONFIG_H # define inline __inline # endif # else # define int64_t_C(c) (c ## LL) # define uint64_t_C(c) (c ## ULL) # endif /* __MINGW32__ */ # ifdef HAVE_AV_CONFIG_H # ifdef _DEBUG # define DEBUG # endif # define snprintf _snprintf # define vsnprintf _vsnprintf # endif /* CONFIG_WIN32 end */ #elif defined (CONFIG_OS2) /* OS/2 EMX */ #ifndef int64_t_C #define int64_t_C(c) (c ## LL) #define uint64_t_C(c) (c ## ULL) #endif #ifdef HAVE_AV_CONFIG_H #ifdef USE_FASTMEMCPY #include "fastmemcpy.h" #endif #include <float.h> #endif /* HAVE_AV_CONFIG_H */ /* CONFIG_OS2 end */ #else /* unix */ #ifndef int64_t_C #define int64_t_C(c) (c ## LL) #define uint64_t_C(c) (c ## ULL) #endif #ifdef HAVE_AV_CONFIG_H # ifdef USE_FASTMEMCPY # include "fastmemcpy.h" # endif # endif /* HAVE_AV_CONFIG_H */ #endif /* !CONFIG_WIN32 && !CONFIG_OS2 */ #ifdef HAVE_AV_CONFIG_H # include "bswap.h" # if defined(__MINGW32__) || defined(__CYGWIN__) || \ defined(__OS2__) || (defined (__OpenBSD__) && !defined(__ELF__)) # define MANGLE(a) "_" #a # else # define MANGLE(a) #a # endif /* debug stuff */ # ifndef DEBUG # define NDEBUG # endif # include <assert.h> /* dprintf macros */ # if defined(CONFIG_WIN32) && !defined(__MINGW32__) inline void dprintf(const char* fmt,...) {} # else # ifdef DEBUG # define dprintf(fmt,...) printf(fmt, __VA_ARGS__) # else # define dprintf(fmt,...) # endif # endif /* !CONFIG_WIN32 */ # define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0) //rounded divison & shift #define RSHIFT(a,b) ((a) > 0 ? ((a) + (1<<((b)-1)))>>(b) : ((a) + (1<<((b)-1))-1)>>(b)) /* assume b>0 */ #define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b)) #define ABS(a) ((a) >= 0 ? (a) : (-(a))) #define FFMAX(a,b) ((a) > (b) ? (a) : (b)) #define FFMIN(a,b) ((a) > (b) ? (b) : (a)) extern const uint32_t inverse[256]; #ifdef ARCH_X86 # define FASTDIV(a,b) \ ({\ int ret,dmy;\ asm volatile(\ "mull %3"\ :"=d"(ret),"=a"(dmy)\ :"1"(a),"g"(inverse[b])\ );\ ret;\ }) #elif defined(CONFIG_FASTDIV) # define FASTDIV(a,b) ((uint32_t)((((uint64_t)a)*inverse[b])>>32)) #else # define FASTDIV(a,b) ((a)/(b)) #endif #ifdef 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 */ struct PutBitContext; typedef void (*WriteDataFunc)(void *, uint8_t *, int); 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; void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size); int put_bits_count(PutBitContext *s); void align_put_bits(PutBitContext *s); void flush_put_bits(PutBitContext *s); void put_string(PutBitContext * pbc, char *s, int put_zero); /* bit input */ 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; static inline int get_bits_count(GetBitContext *s); #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; #ifdef ARCH_SPARC64 #define UNALIGNED_STORES_ARE_BAD #endif /* used to avoid missaligned exceptions on some archs (alpha, ...) */ #ifdef ARCH_X86 # define unaligned32(a) (*(uint32_t*)(a)) #else # ifdef __GNUC__ static inline uint32_t unaligned32(const void *v) { struct Unaligned { uint32_t i; } __attribute__((packed)); return ((const struct Unaligned *) v)->i; } # elif defined(__DECC) static inline uint32_t unaligned32(const void *v) { return *(const __unaligned uint32_t *) v; } # else static inline uint32_t unaligned32(const void *v) { return *(const uint32_t *) v; } # endif #endif //!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; #ifdef STATS st_out_bit_counts[st_current_index] += n; #endif // 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 & (int) 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 # ifdef 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 # ifdef 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 } /** * 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 nest num bits SHOW_SBITS(name, gb, num) will return the nest num bits and do sign extension SKIP_BITS(name, gb, num) will skip over the next num bits note, this is equinvalent 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 equinvalent to SKIP_LAST_CACHE; SKIP_COUNTER for examples see get_bits, show_bits, skip_bits, get_vlc */ static inline int unaligned32_be(const void *v) { #ifdef CONFIG_ALIGN const uint8_t *p=v; return (((p[0]<<8) | p[1])<<16) | (p[2]<<8) | (p[3]); #else return be2me_32( unaligned32(v)); //original #endif } #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;\ # define UPDATE_CACHE(name, gb)\ name##_cache= unaligned32_be( ((uint8_t *)(gb)->buffer)+(name##_index>>3) ) << (name##_index&0x07);\ # define SKIP_CACHE(name, gb, num)\ name##_cache <<= (num);\ // 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) ; # 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->index; } #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;\ ((uint16_t*)name##_buffer_ptr)++;\ 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; } #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;\ }\ #ifdef 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; } #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 tmp; register int32_t cache; OPEN_READER(re, s) UPDATE_CACHE(re, s) cache = GET_CACHE(re,s); if ((int32_t)cache<0) { //MSB=1 tmp = NEG_USR32(cache,n); } else { // tmp = (-1<<n) | NEG_USR32(cache,n) + 1; mpeg12.c algo // tmp = - (NEG_USR32(cache,n) ^ ((1 << n) - 1)); h263.c algo tmp = - NEG_USR32(~cache,n); } LAST_SKIP_BITS(re, s, n) CLOSE_READER(re, s) return tmp; } 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 0-17 bits. * Note, the alt bitstream reader can read upto 25 bits, but the libmpeg2 reader cant */ 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; } unsigned int get_bits_long(GetBitContext *s, int n); /** * shows 0-17 bits. * Note, the alt bitstream reader can read upto 25 bits, but the libmpeg2 reader cant */ 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; } unsigned int show_bits_long(GetBitContext *s, int n); 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 ]; result<<= (index&0x07); result>>= 8 - 1; 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); } void init_get_bits(GetBitContext *s, const uint8_t *buffer, int buffer_size); int check_marker(GetBitContext *s, const char *msg); void align_get_bits(GetBitContext *s); int init_vlc(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); 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)\ {\ 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){\ LAST_SKIP_BITS(name, gb, bits)\ 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)\ } // deprecated, dont use get_vlc for new code, use get_vlc2 instead or use GET_VLC directly static inline int get_vlc(GetBitContext *s, VLC *vlc) { int code; VLC_TYPE (*table)[2]= vlc->table; OPEN_READER(re, s) UPDATE_CACHE(re, s) GET_VLC(code, re, s, table, vlc->bits, 3) CLOSE_READER(re, s) return code; } /** * 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 readed to completly * read the longest vlc code * = (max_vlc_length + bits - 1) / bits */ static 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--){ printf("%d", (bits>>i)&1); } for(i=n; i<24; i++) printf(" "); } static inline int get_bits_trace(GetBitContext *s, int n, char *file, char *func, int line){ int r= get_bits(s, n); print_bin(r, n); printf("%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, 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); printf("%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, char *func, int line){ int show= show_bits(s, n); int r= get_xbits(s, n); print_bin(show, n); printf("%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 printf #else //TRACE #define tprintf(...) {} #endif /* define it to include statistics code (useful only for optimizing codec efficiency */ //#define STATS #ifdef STATS enum { ST_UNKNOWN, ST_DC, ST_INTRA_AC, ST_INTER_AC, ST_INTRA_MB, ST_INTER_MB, ST_MV, ST_NB, }; extern int st_current_index; extern unsigned int st_bit_counts[ST_NB]; extern unsigned int st_out_bit_counts[ST_NB]; void print_stats(void); #endif /* misc math functions */ extern const uint8_t ff_log2_tab[256]; static inline int av_log2(unsigned int v) { int n; n = 0; if (v & 0xffff0000) { v >>= 16; n += 16; } if (v & 0xff00) { v >>= 8; n += 8; } n += ff_log2_tab[v]; return n; } static inline int av_log2_16bit(unsigned int v) { int n; n = 0; if (v & 0xff00) { v >>= 8; n += 8; } n += ff_log2_tab[v]; return n; } /* median of 3 */ static inline int mid_pred(int a, int b, int c) { #if 0 int t= (a-b)&((a-b)>>31); a-=t; b+=t; b-= (b-c)&((b-c)>>31); b+= (a-b)&((a-b)>>31); return b; #else if(a>b){ if(c>b){ if(c>a) b=a; else b=c; } }else{ if(b>c){ if(c>a) b=c; else b=a; } } return b; #endif } static inline int clip(int a, int amin, int amax) { if (a < amin) return amin; else if (a > amax) return amax; else return a; } /* math */ extern const uint8_t ff_sqrt_tab[128]; int64_t ff_gcd(int64_t a, int64_t b); static inline int ff_sqrt(int a) { int ret=0; int s; int ret_sq=0; if(a<128) return ff_sqrt_tab[a]; for(s=15; s>=0; s--){ int b= ret_sq + (1<<(s*2)) + (ret<<s)*2; if(b<=a){ ret_sq=b; ret+= 1<<s; } } return ret; } /** * converts fourcc string to int */ static inline int ff_get_fourcc(const char *s){ assert( strlen(s)==4 ); return (s[0]) + (s[1]<<8) + (s[2]<<16) + (s[3]<<24); } #define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24)) #define MKBETAG(a,b,c,d) (d | (c << 8) | (b << 16) | (a << 24)) #ifdef ARCH_X86 #define MASK_ABS(mask, level)\ asm volatile(\ "cdq \n\t"\ "xorl %1, %0 \n\t"\ "subl %1, %0 \n\t"\ : "+a" (level), "=&d" (mask)\ ); #else #define MASK_ABS(mask, level)\ mask= level>>31;\ level= (level^mask)-mask; #endif #if __CPU__ >= 686 && !defined(RUNTIME_CPUDETECT) #define COPY3_IF_LT(x,y,a,b,c,d)\ asm volatile (\ "cmpl %0, %3 \n\t"\ "cmovl %3, %0 \n\t"\ "cmovl %4, %1 \n\t"\ "cmovl %5, %2 \n\t"\ : "+r" (x), "+r" (a), "+r" (c)\ : "r" (y), "r" (b), "r" (d)\ ); #else #define COPY3_IF_LT(x,y,a,b,c,d)\ if((y)<(x)){\ (x)=(y);\ (a)=(b);\ (c)=(d);\ } #endif #ifdef ARCH_X86 static inline long long rdtsc() { long long l; asm volatile( "rdtsc\n\t" : "=A" (l) ); return l; } #define START_TIMER \ uint64_t tend;\ uint64_t tstart= rdtsc();\ #define STOP_TIMER(id) \ tend= rdtsc();\ {\ static uint64_t tsum=0;\ static int tcount=0;\ static int tskip_count=0;\ if(tcount<2 || tend - tstart < 8*tsum/tcount){\ tsum+= tend - tstart;\ tcount++;\ }else\ tskip_count++;\ if(256*256*256*64%(tcount+tskip_count)==0){\ av_log(NULL, AV_LOG_DEBUG, "%Ld dezicycles in %s, %d runs, %d skips\n", tsum*10/tcount, id, tcount, tskip_count);\ }\ } #endif #define CLAMP_TO_8BIT(d) ((d > 0xff) ? 0xff : (d < 0) ? 0 : d) /* avoid usage of various functions */ #define malloc please_use_av_malloc #define free please_use_av_free #define realloc please_use_av_realloc #if !(defined(LIBAVFORMAT_BUILD) || defined(_FRAMEHOOK_H)) #define printf please_use_av_log #define fprintf please_use_av_log #endif #define CHECKED_ALLOCZ(p, size)\ {\ p= av_mallocz(size);\ if(p==NULL && (size)!=0){\ perror("malloc");\ goto fail;\ }\ } #endif /* HAVE_AV_CONFIG_H */ #endif /* COMMON_H */