mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-25 00:32:31 +00:00
887 lines
20 KiB
C
887 lines
20 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__) && !defined(__CYGWIN__)
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# define CONFIG_WIN32
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#endif
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//#define ALT_BITSTREAM_WRITER
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//#define ALIGNED_BITSTREAM_WRITER
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#define ALT_BITSTREAM_READER
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//#define LIBMPEG2_BITSTREAM_READER
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//#define A32_BITSTREAM_READER
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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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# ifndef __BEOS__
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# include <errno.h>
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# else
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# include "berrno.h"
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# endif
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# include <math.h>
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# ifndef ENODATA
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# define ENODATA 61
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# endif
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#endif /* HAVE_AV_CONFIG_H */
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/* Suppress restrict if it was not defined in config.h. */
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#ifndef restrict
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# define restrict
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#endif
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#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
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# define always_inline __attribute__((always_inline)) inline
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#else
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# define always_inline inline
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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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typedef UINT64 uint64_t;
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typedef INT64 int64_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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# 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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# define snprintf _snprintf
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#else /* CONFIG_WIN32 */
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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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# 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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# 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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#ifdef HAVE_AV_CONFIG_H
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# include "bswap.h"
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# if defined(__MINGW32__) || defined(__CYGWIN__) || \
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defined(__OS2__) || defined (__OpenBSD__)
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# define MANGLE(a) "_" #a
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# else
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# define MANGLE(a) #a
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# endif
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/* debug stuff */
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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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# define av_abort() do { fprintf(stderr, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
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//rounded divison & shift
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#define RSHIFT(a,b) ((a) > 0 ? ((a) + (1<<((b)-1)))>>(b) : ((a) + (1<<((b)-1))-1)>>(b))
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/* assume b>0 */
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#define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
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#define ABS(a) ((a) >= 0 ? (a) : (-(a)))
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#define FFMAX(a,b) ((a) > (b) ? (a) : (b))
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#define FFMIN(a,b) ((a) > (b) ? (b) : (a))
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#ifdef ARCH_X86
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// avoid +32 for shift optimization (gcc should do that ...)
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static inline int32_t NEG_SSR32( int32_t a, int8_t s){
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asm ("sarl %1, %0\n\t"
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: "+r" (a)
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: "ic" ((uint8_t)(-s))
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);
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return a;
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}
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static inline uint32_t NEG_USR32(uint32_t a, int8_t s){
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asm ("shrl %1, %0\n\t"
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: "+r" (a)
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: "ic" ((uint8_t)(-s))
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);
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return a;
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}
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#else
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# define NEG_SSR32(a,s) ((( int32_t)(a))>>(32-(s)))
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# define NEG_USR32(a,s) (((uint32_t)(a))>>(32-(s)))
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#endif
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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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#ifdef ALT_BITSTREAM_WRITER
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UINT8 *buf, *buf_end;
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int index;
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#else
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UINT32 bit_buf;
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int bit_left;
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UINT8 *buf, *buf_ptr, *buf_end;
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#endif
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INT64 data_out_size; /* in bytes */
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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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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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void put_string(PutBitContext * pbc, char *s);
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/* bit input */
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typedef struct GetBitContext {
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UINT8 *buffer, *buffer_end;
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#ifdef ALT_BITSTREAM_READER
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int index;
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#elif defined LIBMPEG2_BITSTREAM_READER
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UINT8 *buffer_ptr;
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UINT32 cache;
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int bit_count;
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#elif defined A32_BITSTREAM_READER
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UINT32 *buffer_ptr;
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UINT32 cache0;
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UINT32 cache1;
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int bit_count;
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#endif
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int size;
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} GetBitContext;
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static inline int get_bits_count(GetBitContext *s);
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#define VLC_TYPE INT16
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typedef struct VLC {
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int bits;
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VLC_TYPE (*table)[2]; // code, bits
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int table_size, table_allocated;
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} VLC;
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typedef struct RL_VLC_ELEM {
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int16_t level;
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int8_t len;
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uint8_t run;
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} RL_VLC_ELEM;
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/* used to avoid missaligned exceptions on some archs (alpha, ...) */
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#ifdef ARCH_X86
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# define unaligned32(a) (*(UINT32*)(a))
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#else
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# ifdef __GNUC__
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static inline uint32_t unaligned32(const void *v) {
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struct Unaligned {
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uint32_t i;
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} __attribute__((packed));
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return ((const struct Unaligned *) v)->i;
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}
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# elif defined(__DECC)
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static inline uint32_t unaligned32(const void *v) {
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return *(const __unaligned uint32_t *) v;
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}
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# else
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static inline uint32_t unaligned32(const void *v) {
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return *(const uint32_t *) v;
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}
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# endif
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#endif //!ARCH_X86
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#ifndef ALT_BITSTREAM_WRITER
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static inline void put_bits(PutBitContext *s, int n, unsigned int value)
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{
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unsigned int bit_buf;
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int bit_left;
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#ifdef STATS
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st_out_bit_counts[st_current_index] += n;
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#endif
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// printf("put_bits=%d %x\n", n, value);
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assert(n == 32 || value < (1U << n));
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bit_buf = s->bit_buf;
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bit_left = s->bit_left;
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// printf("n=%d value=%x cnt=%d buf=%x\n", n, value, bit_cnt, bit_buf);
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/* XXX: optimize */
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if (n < bit_left) {
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bit_buf = (bit_buf<<n) | value;
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bit_left-=n;
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} else {
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bit_buf<<=bit_left;
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bit_buf |= value >> (n - bit_left);
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*(UINT32 *)s->buf_ptr = be2me_32(bit_buf);
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//printf("bitbuf = %08x\n", bit_buf);
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s->buf_ptr+=4;
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bit_left+=32 - n;
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bit_buf = value;
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}
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s->bit_buf = bit_buf;
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s->bit_left = bit_left;
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}
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#endif
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#ifdef ALT_BITSTREAM_WRITER
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static inline void put_bits(PutBitContext *s, int n, unsigned int value)
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{
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# ifdef ALIGNED_BITSTREAM_WRITER
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# ifdef ARCH_X86
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asm volatile(
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"movl %0, %%ecx \n\t"
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"xorl %%eax, %%eax \n\t"
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"shrdl %%cl, %1, %%eax \n\t"
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"shrl %%cl, %1 \n\t"
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"movl %0, %%ecx \n\t"
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"shrl $3, %%ecx \n\t"
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"andl $0xFFFFFFFC, %%ecx \n\t"
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"bswapl %1 \n\t"
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"orl %1, (%2, %%ecx) \n\t"
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"bswapl %%eax \n\t"
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"addl %3, %0 \n\t"
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"movl %%eax, 4(%2, %%ecx) \n\t"
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: "=&r" (s->index), "=&r" (value)
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: "r" (s->buf), "r" (n), "0" (s->index), "1" (value<<(-n))
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: "%eax", "%ecx"
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);
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# else
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int index= s->index;
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uint32_t *ptr= ((uint32_t *)s->buf)+(index>>5);
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value<<= 32-n;
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ptr[0] |= be2me_32(value>>(index&31));
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ptr[1] = be2me_32(value<<(32-(index&31)));
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//if(n>24) printf("%d %d\n", n, value);
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index+= n;
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s->index= index;
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# endif
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# else //ALIGNED_BITSTREAM_WRITER
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# ifdef ARCH_X86
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asm volatile(
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"movl $7, %%ecx \n\t"
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"andl %0, %%ecx \n\t"
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"addl %3, %%ecx \n\t"
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"negl %%ecx \n\t"
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"shll %%cl, %1 \n\t"
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"bswapl %1 \n\t"
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"movl %0, %%ecx \n\t"
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"shrl $3, %%ecx \n\t"
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"orl %1, (%%ecx, %2) \n\t"
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"addl %3, %0 \n\t"
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"movl $0, 4(%%ecx, %2) \n\t"
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: "=&r" (s->index), "=&r" (value)
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: "r" (s->buf), "r" (n), "0" (s->index), "1" (value)
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: "%ecx"
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);
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# else
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int index= s->index;
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uint32_t *ptr= (uint32_t*)(((uint8_t *)s->buf)+(index>>3));
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ptr[0] |= be2me_32(value<<(32-n-(index&7) ));
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ptr[1] = 0;
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//if(n>24) printf("%d %d\n", n, value);
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index+= n;
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s->index= index;
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# endif
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# endif //!ALIGNED_BITSTREAM_WRITER
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}
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#endif
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static inline uint8_t* pbBufPtr(PutBitContext *s)
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{
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#ifdef ALT_BITSTREAM_WRITER
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return s->buf + (s->index>>3);
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#else
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return s->buf_ptr;
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#endif
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}
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/* Bitstream reader API docs:
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name
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abritary name which is used as prefix for the internal variables
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gb
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getbitcontext
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OPEN_READER(name, gb)
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loads gb into local variables
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CLOSE_READER(name, gb)
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stores local vars in gb
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UPDATE_CACHE(name, gb)
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refills the internal cache from the bitstream
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after this call at least MIN_CACHE_BITS will be available,
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GET_CACHE(name, gb)
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will output the contents of the internal cache, next bit is MSB of 32 or 64 bit (FIXME 64bit)
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SHOW_UBITS(name, gb, num)
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will return the nest num bits
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SHOW_SBITS(name, gb, num)
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will return the nest num bits and do sign extension
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SKIP_BITS(name, gb, num)
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will skip over the next num bits
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note, this is equinvalent to SKIP_CACHE; SKIP_COUNTER
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SKIP_CACHE(name, gb, num)
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will remove the next num bits from the cache (note SKIP_COUNTER MUST be called before UPDATE_CACHE / CLOSE_READER)
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SKIP_COUNTER(name, gb, num)
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will increment the internal bit counter (see SKIP_CACHE & SKIP_BITS)
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LAST_SKIP_CACHE(name, gb, num)
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will remove the next num bits from the cache if it is needed for UPDATE_CACHE otherwise it will do nothing
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LAST_SKIP_BITS(name, gb, num)
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is equinvalent to SKIP_LAST_CACHE; SKIP_COUNTER
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for examples see get_bits, show_bits, skip_bits, get_vlc
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*/
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#ifdef ALT_BITSTREAM_READER
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# define MIN_CACHE_BITS 25
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# define OPEN_READER(name, gb)\
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int name##_index= (gb)->index;\
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int name##_cache= 0;\
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# define CLOSE_READER(name, gb)\
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(gb)->index= name##_index;\
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# define UPDATE_CACHE(name, gb)\
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name##_cache= be2me_32( unaligned32( ((uint8_t *)(gb)->buffer)+(name##_index>>3) ) ) << (name##_index&0x07);\
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# define SKIP_CACHE(name, gb, num)\
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name##_cache <<= (num);\
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// FIXME name?
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# define SKIP_COUNTER(name, gb, num)\
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name##_index += (num);\
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# define SKIP_BITS(name, gb, num)\
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{\
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SKIP_CACHE(name, gb, num)\
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SKIP_COUNTER(name, gb, num)\
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}\
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# define LAST_SKIP_BITS(name, gb, num) SKIP_COUNTER(name, gb, num)
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# define LAST_SKIP_CACHE(name, gb, num) ;
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# define SHOW_UBITS(name, gb, num)\
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NEG_USR32(name##_cache, num)
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# define SHOW_SBITS(name, gb, num)\
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NEG_SSR32(name##_cache, num)
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# define GET_CACHE(name, gb)\
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((uint32_t)name##_cache)
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static inline int get_bits_count(GetBitContext *s){
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return s->index;
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}
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#elif defined LIBMPEG2_BITSTREAM_READER
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//libmpeg2 like reader
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# define MIN_CACHE_BITS 16
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# define OPEN_READER(name, gb)\
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int name##_bit_count=(gb)->bit_count;\
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int name##_cache= (gb)->cache;\
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uint8_t * name##_buffer_ptr=(gb)->buffer_ptr;\
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# define CLOSE_READER(name, gb)\
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(gb)->bit_count= name##_bit_count;\
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(gb)->cache= name##_cache;\
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(gb)->buffer_ptr= name##_buffer_ptr;\
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# define UPDATE_CACHE(name, gb)\
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if(name##_bit_count > 0){\
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name##_cache+= ((name##_buffer_ptr[0]<<8) + name##_buffer_ptr[1]) << name##_bit_count;\
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name##_buffer_ptr+=2;\
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name##_bit_count-= 16;\
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}\
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# define SKIP_CACHE(name, gb, num)\
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name##_cache <<= (num);\
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# define SKIP_COUNTER(name, gb, num)\
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name##_bit_count += (num);\
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# define SKIP_BITS(name, gb, num)\
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{\
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SKIP_CACHE(name, gb, num)\
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SKIP_COUNTER(name, gb, num)\
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}\
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# define LAST_SKIP_BITS(name, gb, num) SKIP_BITS(name, gb, num)
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# define LAST_SKIP_CACHE(name, gb, num) SKIP_CACHE(name, gb, num)
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# define SHOW_UBITS(name, gb, num)\
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NEG_USR32(name##_cache, num)
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# define SHOW_SBITS(name, gb, num)\
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NEG_SSR32(name##_cache, num)
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# define GET_CACHE(name, gb)\
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((uint32_t)name##_cache)
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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
|
|
|
|
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;
|
|
}
|
|
|
|
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 ];
|
|
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,
|
|
UINT8 *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);
|
|
|
|
#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;
|
|
}
|
|
|
|
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 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 */
|
|
|
|
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;
|
|
}
|
|
if (v & 0xf0) {
|
|
v >>= 4;
|
|
n += 4;
|
|
}
|
|
if (v & 0xc) {
|
|
v >>= 2;
|
|
n += 2;
|
|
}
|
|
if (v & 0x2) {
|
|
n++;
|
|
}
|
|
return n;
|
|
}
|
|
|
|
/* median of 3 */
|
|
static inline int mid_pred(int a, int b, int c)
|
|
{
|
|
int vmin, vmax;
|
|
vmax = vmin = a;
|
|
if (b < vmin)
|
|
vmin = b;
|
|
else
|
|
vmax = b;
|
|
|
|
if (c < vmin)
|
|
vmin = c;
|
|
else if (c > vmax)
|
|
vmax = c;
|
|
|
|
return a + b + c - vmin - vmax;
|
|
}
|
|
|
|
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 ff_sqrt_tab[128];
|
|
|
|
int ff_gcd(int a, int 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);
|
|
}
|
|
|
|
void ff_float2fraction(int *nom_arg, int *denom_arg, double f, int max);
|
|
|
|
|
|
#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
|
|
|
|
#define CLAMP_TO_8BIT(d) ((d > 0xff) ? 0xff : (d < 0) ? 0 : d)
|
|
|
|
#endif /* HAVE_AV_CONFIG_H */
|
|
|
|
#endif /* COMMON_H */
|