common.h

symbian下的FLV播放视频源码 可以快速便捷的播放FLV格式的视频

#ifndef COMMON_H
#define COMMON_H

#define FFMPEG_VERSION_INT 0x000406
#define FFMPEG_VERSION     "0.4.6"

#if defined(WIN32) && !defined(__MINGW32__) && !defined(__CYGWIN__)
#define CONFIG_WIN32
#endif

//#define ALT_BITSTREAM_WRITER
//#define ALIGNED_BITSTREAM_WRITER
//#define ALT_BITSTREAM_READER
//#define ALIGNED_BITSTREAM
#define FAST_GET_FIRST_VLC
//#define DUMP_STREAM // only works with the ALT_BITSTREAM_READER

#ifdef HAVE_AV_CONFIG_H
/* only include the following when compiling package */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <math.h>

#include "config.h"

#ifndef ENODATA
#define ENODATA  61
#endif

#endif /* HAVE_AV_CONFIG_H */

#ifdef CONFIG_WIN32

/* windows */

typedef unsigned short UINT16;
typedef signed short INT16;
typedef unsigned char UINT8;
typedef unsigned int UINT32;
typedef unsigned __int64 UINT64;
typedef signed char INT8;
typedef signed int INT32;
typedef signed __int64 INT64;

#ifndef __MINGW32__
#define INT64_C(c)     (c ## i64)
#define UINT64_C(c)    (c ## i64)

#define inline __inline

#else
#define INT64_C(c)     (c ## LL)
#define UINT64_C(c)    (c ## ULL)
#endif /* __MINGW32__ */

#define M_PI    3.14159265358979323846
#define M_SQRT2 1.41421356237309504880  /* sqrt(2) */

#ifdef _DEBUG
#define DEBUG
#endif

//#define snprintf _snprintf

#else /* CONFIG_WIN32 */

/* unix */

//#include <inttypes.h>

#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;

#ifdef HAVE_AV_CONFIG_H

#ifdef __FreeBSD__
#include <sys/param.h>
#endif

#ifndef INT64_C
#define INT64_C(c)     (c ## LL)
#define UINT64_C(c)    (c ## ULL)
#endif

#ifdef USE_FASTMEMCPY
#include "fastmemcpy.h"
#endif

#endif /* HAVE_AV_CONFIG_H */

#endif /* !CONFIG_WIN32 */

#ifdef HAVE_AV_CONFIG_H

#include "bswap.h"

#if defined(__MINGW32__) || defined(__CYGWIN__) || \
    defined(__OS2__) || defined (__OpenBSD__)
#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,args...) printf(fmt, ## args)
#else
#define dprintf(fmt,args...)
#endif

#endif /* !CONFIG_WIN32 */

#define av_abort()      do { fprintf(stderr, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)

/* 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 MAX(a,b) ((a) > (b) ? (a) : (b))
#define MIN(a,b) ((a) > (b) ? (b) : (a))

/* bit output */

struct PutBitContext;

typedef void (*WriteDataFunc)(void *, UINT8 *, int);

typedef struct PutBitContext {
#ifdef ALT_BITSTREAM_WRITER
    UINT8 *buf, *buf_end;
    int index;
#else
    UINT32 bit_buf;
    int bit_left;
    UINT8 *buf, *buf_ptr, *buf_end;
#endif
    INT64 data_out_size; /* in bytes */
} PutBitContext;

void init_put_bits(PutBitContext *s, 
                   UINT8 *buffer, int buffer_size,
                   void *opaque,
                   void (*write_data)(void *, UINT8 *, int));

INT64 get_bit_count(PutBitContext *s); /* XXX: change function name */
void align_put_bits(PutBitContext *s);
void flush_put_bits(PutBitContext *s);
void put_string(PutBitContext * pbc, char *s);

/* jpeg specific put_bits */
void jflush_put_bits(PutBitContext *s);

/* bit input */

typedef struct GetBitContext {
#ifdef ALT_BITSTREAM_READER
    int index;
    UINT8 *buffer;
#else
    UINT32 bit_buf;
    int bit_cnt;
    UINT8 *buf, *buf_ptr, *buf_end;
#endif
    int size;
} GetBitContext;

static inline int get_bits_count(GetBitContext *s);

typedef struct VLC {
    int bits;
    INT16 *table_codes;
    INT8 *table_bits;
    int table_size, table_allocated;
} VLC;

/* used to avoid missaligned exceptions on some archs (alpha, ...) */
#ifdef ARCH_X86
#define unaligned32(a) (*(UINT32*)(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);
        *(UINT32 *)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

#ifndef ALT_BITSTREAM_WRITER
/* for jpeg : escape 0xff with 0x00 after it */
static inline void jput_bits(PutBitContext *s, int n, unsigned int value)
{
    unsigned int bit_buf, b;
    int bit_left, i;
    
    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);
        /* handle escape */
        for(i=0;i<4;i++) {
            b = (bit_buf >> 24);
            *(s->buf_ptr++) = b;
            if (b == 0xff)
                *(s->buf_ptr++) = 0;
            bit_buf <<= 8;
        }

	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 jput_bits(PutBitContext *s, int n, int value)
{
    int index= s->index;
    uint32_t *ptr= (uint32_t*)(((uint8_t *)s->buf)+(index>>3));
    int v= ptr[0];
//if(n>24) printf("%d %d\n", n, value);
    
    v |= be2me_32(value<<(32-n-(index&7) ));
    if(((v+0x01010101)^0xFFFFFFFF)&v&0x80808080)
    {
	/* handle idiotic (m)jpeg escapes */
	uint8_t *bPtr= (uint8_t*)ptr;
	int numChecked= ((index+n)>>3) - (index>>3);
	
	v= be2me_32(v);

	*(bPtr++)= v>>24;
	if((v&0xFF000000)==0xFF000000 && numChecked>0){
		*(bPtr++)= 0x00;
		index+=8;
	}
	*(bPtr++)= (v>>16)&0xFF;
	if((v&0x00FF0000)==0x00FF0000 && numChecked>1){
		*(bPtr++)= 0x00;
		index+=8;
	}
	*(bPtr++)= (v>>8)&0xFF;
	if((v&0x0000FF00)==0x0000FF00 && numChecked>2){
		*(bPtr++)= 0x00;
		index+=8;
	}
	*(bPtr++)= v&0xFF;
	if((v&0x000000FF)==0x000000FF && numChecked>3){
		*(bPtr++)= 0x00;
		index+=8;
	}
	*((uint32_t*)bPtr)= 0;
    }
    else
    {
	ptr[0] = v;
	ptr[1] = 0;
    }

    index+= n;
    s->index= index;
 }
#endif

static inline uint8_t* pbBufPtr(PutBitContext *s)
{
#ifdef ALT_BITSTREAM_WRITER
	return s->buf + (s->index>>3);
#else
	return s->buf_ptr;
#endif
}

void init_get_bits(GetBitContext *s, 
                   UINT8 *buffer, int buffer_size);

#ifndef ALT_BITSTREAM_READER
unsigned int get_bits_long(GetBitContext *s, int n);
unsigned int show_bits_long(GetBitContext *s, int n);
#endif

static inline unsigned int get_bits(GetBitContext *s, int n){
#ifdef ALT_BITSTREAM_READER
#ifdef ALIGNED_BITSTREAM
    int index= s->index;
    uint32_t result1= be2me_32( ((uint32_t *)s->buffer)[index>>5] );
    uint32_t result2= be2me_32( ((uint32_t *)s->buffer)[(index>>5) + 1] );
#ifdef ARCH_X86
    asm ("shldl %%cl, %2, %0\n\t"
         : "=r" (result1)
	 : "0" (result1), "r" (result2), "c" (index));
#else
    result1<<= (index&0x1F);
    result2= (result2>>1) >> (31-(index&0x1F));
    result1|= result2;
#endif
    result1>>= 32 - n;
    index+= n;
    s->index= index;
    
    return result1;
#else //ALIGNED_BITSTREAM
    int index= s->index;
    uint32_t result= be2me_32( unaligned32( ((uint8_t *)s->buffer)+(index>>3) ) );

    result<<= (index&0x07);
    result>>= 32 - n;
    index+= n;
    s->index= index;
#ifdef DUMP_STREAM
    while(n){
        printf("%d", (result>>(n-1))&1);