mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-09-09 09:16:59 +02:00
229 lines
4.7 KiB
C
229 lines
4.7 KiB
C
#ifndef COMMON_H
|
|
#define COMMON_H
|
|
|
|
#ifdef HAVE_AV_CONFIG_H
|
|
#include "../config.h"
|
|
#endif
|
|
|
|
#ifndef __WINE_WINDEF16_H
|
|
/* workaround for typedef conflict in MPlayer (wine typedefs) */
|
|
typedef unsigned short UINT16;
|
|
typedef signed short INT16;
|
|
#endif
|
|
|
|
typedef unsigned char UINT8;
|
|
typedef unsigned int UINT32;
|
|
typedef unsigned long long UINT64;
|
|
typedef signed char INT8;
|
|
typedef signed int INT32;
|
|
typedef signed long long INT64;
|
|
|
|
/* bit output */
|
|
|
|
struct PutBitContext;
|
|
|
|
typedef void (*WriteDataFunc)(void *, UINT8 *, int);
|
|
|
|
typedef struct PutBitContext {
|
|
UINT32 bit_buf;
|
|
int bit_cnt;
|
|
UINT8 *buf, *buf_ptr, *buf_end;
|
|
long long data_out_size; /* in bytes */
|
|
void *opaque;
|
|
WriteDataFunc write_data;
|
|
} PutBitContext;
|
|
|
|
void init_put_bits(PutBitContext *s,
|
|
UINT8 *buffer, int buffer_size,
|
|
void *opaque,
|
|
void (*write_data)(void *, UINT8 *, int));
|
|
void put_bits(PutBitContext *s, int n, unsigned int value);
|
|
long long get_bit_count(PutBitContext *s);
|
|
void align_put_bits(PutBitContext *s);
|
|
void flush_put_bits(PutBitContext *s);
|
|
|
|
/* jpeg specific put_bits */
|
|
void jput_bits(PutBitContext *s, int n, unsigned int value);
|
|
void jflush_put_bits(PutBitContext *s);
|
|
|
|
/* bit input */
|
|
|
|
typedef struct GetBitContext {
|
|
UINT32 bit_buf;
|
|
int bit_cnt;
|
|
UINT8 *buf, *buf_ptr, *buf_end;
|
|
} GetBitContext;
|
|
|
|
typedef struct VLC {
|
|
int bits;
|
|
INT16 *table_codes;
|
|
INT8 *table_bits;
|
|
int table_size, table_allocated;
|
|
} VLC;
|
|
|
|
void init_get_bits(GetBitContext *s,
|
|
UINT8 *buffer, int buffer_size);
|
|
|
|
unsigned int get_bits_long(GetBitContext *s, int n);
|
|
|
|
static inline unsigned int get_bits(GetBitContext *s, int n){
|
|
if(s->bit_cnt>=n){
|
|
/* most common case here */
|
|
unsigned int val = s->bit_buf >> (32 - n);
|
|
s->bit_buf <<= n;
|
|
s->bit_cnt -= n;
|
|
#ifdef STATS
|
|
st_bit_counts[st_current_index] += n;
|
|
#endif
|
|
return val;
|
|
}
|
|
return get_bits_long(s,n);
|
|
}
|
|
|
|
static inline unsigned int get_bits1(GetBitContext *s){
|
|
if(s->bit_cnt>0){
|
|
/* most common case here */
|
|
unsigned int val = s->bit_buf >> 31;
|
|
s->bit_buf <<= 1;
|
|
s->bit_cnt--;
|
|
#ifdef STATS
|
|
st_bit_counts[st_current_index]++;
|
|
#endif
|
|
return val;
|
|
}
|
|
return get_bits_long(s,1);
|
|
}
|
|
|
|
static inline void skip_bits(GetBitContext *s, int n){
|
|
if(s->bit_cnt>=n){
|
|
/* most common case here */
|
|
s->bit_buf <<= n;
|
|
s->bit_cnt -= n;
|
|
#ifdef STATS
|
|
st_bit_counts[st_current_index] += n;
|
|
#endif
|
|
} else {
|
|
get_bits_long(s,n);
|
|
}
|
|
}
|
|
|
|
static inline void skip_bits1(GetBitContext *s){
|
|
if(s->bit_cnt>0){
|
|
/* most common case here */
|
|
s->bit_buf <<= 1;
|
|
s->bit_cnt--;
|
|
#ifdef STATS
|
|
st_bit_counts[st_current_index]++;
|
|
#endif
|
|
} else {
|
|
get_bits_long(s,1);
|
|
}
|
|
}
|
|
|
|
|
|
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);
|
|
int get_vlc(GetBitContext *s, VLC *vlc);
|
|
|
|
/* macro to go faster */
|
|
/* n must be <= 24 */
|
|
/* XXX: optimize buffer end test */
|
|
#define SHOW_BITS(s, val, n)\
|
|
{\
|
|
if (bit_cnt < n && buf_ptr < (s)->buf_end) {\
|
|
bit_buf |= *buf_ptr++ << (24 - bit_cnt);\
|
|
bit_cnt += 8;\
|
|
if (bit_cnt < n && buf_ptr < (s)->buf_end) {\
|
|
bit_buf |= *buf_ptr++ << (24 - bit_cnt);\
|
|
bit_cnt += 8;\
|
|
if (bit_cnt < n && buf_ptr < (s)->buf_end) {\
|
|
bit_buf |= *buf_ptr++ << (24 - bit_cnt);\
|
|
bit_cnt += 8;\
|
|
}\
|
|
}\
|
|
}\
|
|
val = bit_buf >> (32 - n);\
|
|
}
|
|
|
|
/* SHOW_BITS with n1 >= n must be been done before */
|
|
#define FLUSH_BITS(n)\
|
|
{\
|
|
bit_buf <<= n;\
|
|
bit_cnt -= n;\
|
|
}
|
|
|
|
#define SAVE_BITS(s) \
|
|
{\
|
|
bit_cnt = (s)->bit_cnt;\
|
|
bit_buf = (s)->bit_buf;\
|
|
buf_ptr = (s)->buf_ptr;\
|
|
}
|
|
|
|
#define RESTORE_BITS(s) \
|
|
{\
|
|
(s)->buf_ptr = buf_ptr;\
|
|
(s)->bit_buf = bit_buf;\
|
|
(s)->bit_cnt = bit_cnt;\
|
|
}
|
|
|
|
/* 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 inline int log2(unsigned int v)
|
|
{
|
|
int n;
|
|
|
|
n = 0;
|
|
if (v & 0xffff0000) {
|
|
v >>= 16;
|
|
n += 16;
|
|
}
|
|
if (v & 0xff00) {
|
|
v >>= 8;
|
|
n += 8;
|
|
}
|
|
if (v & 0xf0) {
|
|
v >>= 4;
|
|
n += 4;
|
|
}
|
|
if (v & 0xc) {
|
|
v >>= 2;
|
|
n += 2;
|
|
}
|
|
if (v & 0x2) {
|
|
n++;
|
|
}
|
|
return n;
|
|
}
|
|
|
|
/* memory */
|
|
void *av_mallocz(int size);
|
|
|
|
#endif
|