mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
365 lines
7.3 KiB
C
365 lines
7.3 KiB
C
#ifndef COMMON_H
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#define COMMON_H
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#define FFMPEG_VERSION_INT 0x000406
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#define FFMPEG_VERSION "0.4.6"
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#if defined(WIN32) && !defined(__MINGW32__)
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#define CONFIG_WIN32
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#endif
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#ifdef HAVE_AV_CONFIG_H
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/* only include the following when compiling package */
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#include "../config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#ifndef ENODATA
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#define ENODATA 61
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#endif
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#endif
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#ifdef CONFIG_WIN32
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/* windows */
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typedef unsigned short UINT16;
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typedef signed short INT16;
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typedef unsigned char UINT8;
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typedef unsigned int UINT32;
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typedef unsigned __int64 UINT64;
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typedef signed char INT8;
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typedef signed int INT32;
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typedef signed __int64 INT64;
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typedef UINT8 uint8_t;
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typedef INT8 int8_t;
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typedef UINT16 uint16_t;
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typedef INT16 int16_t;
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typedef UINT32 uint32_t;
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typedef INT32 int32_t;
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#ifndef __MINGW32__
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#define INT64_C(c) (c ## i64)
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#define UINT64_C(c) (c ## i64)
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#define inline __inline
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/*
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Disable warning messages:
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warning C4244: '=' : conversion from 'double' to 'float', possible loss of data
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warning C4305: 'argument' : truncation from 'const double' to 'float'
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*/
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#pragma warning( disable : 4244 )
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#pragma warning( disable : 4305 )
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#else
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#define INT64_C(c) (c ## LL)
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#define UINT64_C(c) (c ## ULL)
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#endif /* __MINGW32__ */
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#define M_PI 3.14159265358979323846
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#define M_SQRT2 1.41421356237309504880 /* sqrt(2) */
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#ifdef _DEBUG
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#define DEBUG
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#endif
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// code from bits/byteswap.h (C) 1997, 1998 Free Software Foundation, Inc.
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#define bswap_32(x) \
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((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
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(((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
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#define be2me_32(x) bswap_32(x)
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#define snprintf _snprintf
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#ifndef __MINGW32__
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/* no config.h with VC */
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#define CONFIG_ENCODERS 1
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#define CONFIG_DECODERS 1
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#define CONFIG_AC3 1
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#define CONFIG_MPGLIB 1
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#endif
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#else
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/* unix */
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#include <inttypes.h>
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#ifndef __WINE_WINDEF16_H
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/* workaround for typedef conflict in MPlayer (wine typedefs) */
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typedef unsigned short UINT16;
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typedef signed short INT16;
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#endif
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typedef unsigned char UINT8;
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typedef unsigned int UINT32;
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typedef unsigned long long UINT64;
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typedef signed char INT8;
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typedef signed int INT32;
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typedef signed long long INT64;
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#ifdef HAVE_AV_CONFIG_H
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#ifdef __FreeBSD__
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#include <sys/param.h>
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#endif
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#ifndef INT64_C
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#define INT64_C(c) (c ## LL)
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#define UINT64_C(c) (c ## ULL)
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#endif
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#include "../bswap.h"
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#ifdef USE_FASTMEMCPY
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#include "fastmemcpy.h"
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#endif
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#endif /* HAVE_AV_CONFIG_H */
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#endif /* !CONFIG_WIN32 */
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/* debug stuff */
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#ifdef HAVE_AV_CONFIG_H
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#ifndef DEBUG
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#define NDEBUG
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#endif
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#include <assert.h>
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/* dprintf macros */
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#if defined(CONFIG_WIN32) && !defined(__MINGW32__)
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inline void dprintf(const char* fmt,...) {}
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#else
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#ifdef DEBUG
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#define dprintf(fmt,args...) printf(fmt, ## args)
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#else
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#define dprintf(fmt,args...)
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#endif
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#endif /* !CONFIG_WIN32 */
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#endif /* HAVE_AV_CONFIG_H */
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/* bit output */
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struct PutBitContext;
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typedef void (*WriteDataFunc)(void *, UINT8 *, int);
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typedef struct PutBitContext {
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UINT32 bit_buf;
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int bit_cnt;
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UINT8 *buf, *buf_ptr, *buf_end;
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INT64 data_out_size; /* in bytes */
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void *opaque;
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WriteDataFunc write_data;
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} PutBitContext;
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void init_put_bits(PutBitContext *s,
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UINT8 *buffer, int buffer_size,
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void *opaque,
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void (*write_data)(void *, UINT8 *, int));
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void put_bits(PutBitContext *s, int n, unsigned int value);
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INT64 get_bit_count(PutBitContext *s); /* XXX: change function name */
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void align_put_bits(PutBitContext *s);
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void flush_put_bits(PutBitContext *s);
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/* jpeg specific put_bits */
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void jput_bits(PutBitContext *s, int n, unsigned int value);
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void jflush_put_bits(PutBitContext *s);
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/* bit input */
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typedef struct GetBitContext {
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UINT32 bit_buf;
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int bit_cnt;
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UINT8 *buf, *buf_ptr, *buf_end;
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} GetBitContext;
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typedef struct VLC {
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int bits;
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INT16 *table_codes;
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INT8 *table_bits;
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int table_size, table_allocated;
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} VLC;
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void init_get_bits(GetBitContext *s,
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UINT8 *buffer, int buffer_size);
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unsigned int get_bits_long(GetBitContext *s, int n);
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static inline unsigned int get_bits(GetBitContext *s, int n){
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if(s->bit_cnt>=n){
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/* most common case here */
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unsigned int val = s->bit_buf >> (32 - n);
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s->bit_buf <<= n;
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s->bit_cnt -= n;
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#ifdef STATS
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st_bit_counts[st_current_index] += n;
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#endif
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return val;
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}
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return get_bits_long(s,n);
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}
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static inline unsigned int get_bits1(GetBitContext *s){
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if(s->bit_cnt>0){
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/* most common case here */
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unsigned int val = s->bit_buf >> 31;
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s->bit_buf <<= 1;
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s->bit_cnt--;
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#ifdef STATS
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st_bit_counts[st_current_index]++;
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#endif
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return val;
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}
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return get_bits_long(s,1);
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}
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static inline void skip_bits(GetBitContext *s, int n){
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if(s->bit_cnt>=n){
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/* most common case here */
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s->bit_buf <<= n;
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s->bit_cnt -= n;
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#ifdef STATS
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st_bit_counts[st_current_index] += n;
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#endif
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} else {
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get_bits_long(s,n);
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}
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}
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static inline void skip_bits1(GetBitContext *s){
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if(s->bit_cnt>0){
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/* most common case here */
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s->bit_buf <<= 1;
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s->bit_cnt--;
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#ifdef STATS
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st_bit_counts[st_current_index]++;
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#endif
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} else {
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get_bits_long(s,1);
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}
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}
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static inline int get_bits_count(GetBitContext *s)
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{
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return (s->buf_ptr - s->buf) * 8 - s->bit_cnt;
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}
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void align_get_bits(GetBitContext *s);
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int init_vlc(VLC *vlc, int nb_bits, int nb_codes,
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const void *bits, int bits_wrap, int bits_size,
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const void *codes, int codes_wrap, int codes_size);
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void free_vlc(VLC *vlc);
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int get_vlc(GetBitContext *s, VLC *vlc);
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/* macro to go faster */
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/* n must be <= 24 */
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/* XXX: optimize buffer end test */
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#define SHOW_BITS(s, val, n)\
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{\
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if (bit_cnt < n && buf_ptr < (s)->buf_end) {\
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bit_buf |= *buf_ptr++ << (24 - bit_cnt);\
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bit_cnt += 8;\
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if (bit_cnt < n && buf_ptr < (s)->buf_end) {\
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bit_buf |= *buf_ptr++ << (24 - bit_cnt);\
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bit_cnt += 8;\
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if (bit_cnt < n && buf_ptr < (s)->buf_end) {\
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bit_buf |= *buf_ptr++ << (24 - bit_cnt);\
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bit_cnt += 8;\
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}\
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}\
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}\
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val = bit_buf >> (32 - n);\
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}
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/* SHOW_BITS with n1 >= n must be been done before */
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#define FLUSH_BITS(n)\
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{\
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bit_buf <<= n;\
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bit_cnt -= n;\
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}
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#define SAVE_BITS(s) \
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{\
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bit_cnt = (s)->bit_cnt;\
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bit_buf = (s)->bit_buf;\
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buf_ptr = (s)->buf_ptr;\
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}
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#define RESTORE_BITS(s) \
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{\
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(s)->buf_ptr = buf_ptr;\
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(s)->bit_buf = bit_buf;\
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(s)->bit_cnt = bit_cnt;\
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}
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/* define it to include statistics code (useful only for optimizing
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codec efficiency */
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//#define STATS
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#ifdef STATS
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enum {
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ST_UNKNOWN,
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ST_DC,
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ST_INTRA_AC,
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ST_INTER_AC,
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ST_INTRA_MB,
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ST_INTER_MB,
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ST_MV,
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ST_NB,
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};
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extern int st_current_index;
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extern unsigned int st_bit_counts[ST_NB];
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extern unsigned int st_out_bit_counts[ST_NB];
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void print_stats(void);
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#endif
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/* misc math functions */
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extern inline int av_log2(unsigned int v)
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{
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int n;
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n = 0;
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if (v & 0xffff0000) {
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v >>= 16;
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n += 16;
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}
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if (v & 0xff00) {
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v >>= 8;
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n += 8;
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}
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if (v & 0xf0) {
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v >>= 4;
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n += 4;
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}
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if (v & 0xc) {
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v >>= 2;
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n += 2;
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}
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if (v & 0x2) {
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n++;
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}
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return n;
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}
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/* memory */
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void *av_mallocz(int size);
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#endif
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