yuv2yuv.c

linux下的一款播放器

                    su += uPitch;
                    sv += vPitch;
                    d += dest_pitch/2;
                }

            } else {

                /* adjust hue: */
                for (i = 0; i < dest_dy/2; i ++) {

                    /* convert pixels: */
                    for (j = 0; j < dest_dx/2; j ++) {
                        register unsigned v = sv[j], u = su[j];
                        d[j] = _CLIP(8,_vvtab[v] + _vutab[u]);
                        d[j + dest_uv_offs] = _CLIP(8,_uutab[u] + _uvtab[v]);
                    }

                    su += uPitch;
                    sv += vPitch;
                    d += dest_pitch/2;
                }
            }
        }
        return 0;
    }

    /* conversion is not supported */
    return -1;
}

/*
 * I420toYV12() converter:
 */
int I420toYV12 (unsigned char *dest_ptr, int dest_width, int dest_height,
    int dest_pitch, int dest_x, int dest_y, int dest_dx, int dest_dy,
    unsigned char *src_ptr, int src_width, int src_height, int src_pitch,
    int src_x, int src_y, int src_dx, int src_dy)
{
#if 1
    unsigned char *pU = src_ptr+src_height*src_pitch,
                  *pV = pU + src_height*src_pitch/4;
    return I420toYV12x(dest_ptr, dest_width, dest_height, dest_pitch, dest_x, dest_y, dest_dx, dest_dy,
                       src_ptr, pU, pV, 
                       src_width, src_height, src_pitch, src_pitch/2, src_pitch/2,
                       src_x, src_y, src_dx, src_dy);
                    

#else
    /* scale factors: */
    int scale_x, scale_y;

    /* check arguments: */
    if (!chk_args (dest_ptr, dest_width, dest_height, dest_pitch,
        dest_x, dest_y, dest_dx, dest_dy, src_ptr, src_width, src_height,
        src_pitch, src_x, src_y, src_dx, src_dy, &scale_x, &scale_y))
        return -1;

    /* remove odd destination pixels: */
    if (!adjust_range (&dest_x, &dest_dx, &src_x, &src_dx, scale_x) ||
        !adjust_range (&dest_y, &dest_dy, &src_y, &src_dy, scale_y))
        return 0;

    /* check if we have matching chroma components: */
    if ((src_x & 1) || (src_y & 1))
        return -1;                          /* can't shift chromas */

    /* check if bottop-up images: */
    if (dest_pitch <= 0 || src_pitch <= 0)
        return -1;                          /* not supported for this format */

    /* check if 1:1 scale: */
    if (scale_x == 1 && scale_y == 1) {

        /* check if no color adjustments: */
        if (!(is_alpha | is_beta | is_gamma | is_kappa)) {

            /* no color adjustments: */
            unsigned char *s, *d;
            int src_uv_offs, dest_uv_offs;
            register int i;

            /* copy Y plane: */
            s = src_ptr + src_x + src_y * src_pitch;
            d = dest_ptr + dest_x + dest_y * dest_pitch;
            for (i = 0; i < dest_dy; i ++) {
                memcpy (d, s, dest_dx); /* Flawfinder: ignore */
                s += src_pitch;
                d += dest_pitch;
            }

            /* get Cr/Cb offsets: */
            src_uv_offs = src_height * src_pitch / 4;
            dest_uv_offs = dest_height * dest_pitch / 4;

            /* copy Cr/Cb planes: */
            s = (src_ptr + src_height * src_pitch) + src_x/2 + src_y/2 * src_pitch/2;
            d = (dest_ptr + dest_height * dest_pitch) + dest_x/2 + dest_y/2 * dest_pitch/2;
            for (i = 0; i < dest_dy/2; i ++) {
                memcpy (d, s + src_uv_offs, dest_dx/2); /* Flawfinder: ignore */
                memcpy (d + dest_uv_offs, s, dest_dx/2); /* Flawfinder: ignore */
                s += src_pitch/2;
                d += dest_pitch/2;
            }

        } else {

            /* adjust colors: */
            unsigned char *s, *d;
            int src_uv_offs, dest_uv_offs;
            register int i, j;

            /* convert Y plane: */
            s = src_ptr + src_x + src_y * src_pitch;
            d = dest_ptr + dest_x + dest_y * dest_pitch;
            for (i = 0; i < dest_dy; i ++) {

                /* convert pixels: */
                for (j = 0; j < dest_dx; j ++)
                    d[j] = _yytab[s[j]];

                s += src_pitch;
                d += dest_pitch;
            }

            /* get Cr/Cb offsets: */
            src_uv_offs = src_height * src_pitch / 4;
            dest_uv_offs = dest_height * dest_pitch / 4;

            /* get chroma pointers: */
            s = (src_ptr + src_height * src_pitch) + src_x/2 + src_y/2 * src_pitch/2;
            d = (dest_ptr + dest_height * dest_pitch) + dest_x/2 + dest_y/2 * dest_pitch/2;

            /* check if no hue adjustment: */
            if (!is_alpha) {

                /* no chroma rotation: */
                for (i = 0; i < dest_dy/2; i ++) {

                    /* convert pixels: */
                    for (j = 0; j < dest_dx/2; j ++) {
                        d[j] = _vvtab[s[j + src_uv_offs]];
                        d[j + dest_uv_offs] = _uutab[s[j]];
                    }

                    s += src_pitch/2;
                    d += dest_pitch/2;
                }

            } else {

                /* adjust hue: */
                for (i = 0; i < dest_dy/2; i ++) {

                    /* convert pixels: */
                    for (j = 0; j < dest_dx/2; j ++) {
                        register unsigned v = s[j + src_uv_offs], u = s[j];
                        d[j] = _CLIP(8,_vvtab[v] + _vutab[u]);
                        d[j + dest_uv_offs] = _CLIP(8,_uutab[u] + _uvtab[v]);
                    }

                    s += src_pitch/2;
                    d += dest_pitch/2;
                }
            }
        }
        return 0;
    }

    /* conversion is not supported */
    return -1;
#endif
}



#if (defined(_M_IX86) || defined(_USE_MMX_BLENDERS)) && !defined(WINCE_EMULATOR)

//Our MMX optimized YUY2 and UYVY to YUV converters.
//No scaling supported yet.
extern void YUY2ToPlanarYUV_MMX( unsigned char* d1,      
                                 unsigned char* d2,      
                                 unsigned char* du,      
                                 unsigned char* dv,      
                                 INT32          dyPitch, 
                                 INT32          duPitch, 
                                 INT32          dvPitch, 
                                 INT32          dest_dx, 
                                 INT32          dest_dy, 
                                 unsigned char* s1,      
                                 unsigned char* s2,      
                                 INT32          src_pitch
                                 );
extern void UYVYToPlanarYUV_MMX( unsigned char* d1,      
                                 unsigned char* d2,      
                                 unsigned char* du,      
                                 unsigned char* dv,      
                                 INT32          dyPitch, 
                                 INT32          duPitch, 
                                 INT32          dvPitch, 
                                 INT32          dest_dx, 
                                 INT32          dest_dy, 
                                 unsigned char* s1,      
                                 unsigned char* s2,      
                                 INT32          src_pitch
                                 );

extern  YUY2toUYVY_MMX( unsigned char* src,
                        unsigned char* dest,
                        ULONG32        dx
                        );

/* MMX version of I420toYUY2 converter: */
extern void _MMX_lineI420toYUY2( unsigned char *sy,
                                 unsigned char *su,
                                 unsigned char *sv,
                                 unsigned char *d,
                                 int count
                                 );

/*  MMX version of I420toUYVY converter */
extern void _MMX_lineI420toUYVY( unsigned char *sy,
                                 unsigned char *su,
                                 unsigned char *sv,
                                 unsigned char *d,
                                 int count
                                 );

#endif

#ifdef _MACINTOSH
#ifdef __cplusplus
extern "C"
#endif
void
AltiVec_lineI420toYUY2 (
	unsigned char *sy, 
	unsigned char *su, 
	unsigned char *sv,
	unsigned char *d,
	int dest_dx);
#endif


/*
 * Combine 4 bytes in a register for fast transfer to
 * the main memory:
 */
#if BYTE_ORDER == LITTLE_ENDIAN
#define COMBINE(b0,b1,b2,b3)  \
    ((unsigned int)(b0) | ((unsigned int)(b1) << 8) | \
    ((unsigned int)(b2) << 16) | ((unsigned int)(b3) << 24))
#else /* BYTE_ORDER != LITTLE_ENDIAN */
#define COMBINE(b0,b1,b2,b3)  \
    ((unsigned int)(b3) | ((unsigned int)(b2) << 8) | \
    ((unsigned int)(b1) << 16) | ((unsigned int)(b0) << 24))
#endif

int I420toYUY2x (unsigned char *dest_ptr, int dest_width, int dest_height,
                 int dest_pitch, int dest_x, int dest_y, int dest_dx, int dest_dy,
                 unsigned char *pY, unsigned char *pU, unsigned char *pV,
                 int src_width, int src_height, int yPitch, int uPitch, int vPitch,
                 int src_x, int src_y, int src_dx, int src_dy)
{
    /* scale factors: */
    int scale_x, scale_y;

    /* check arguments: */
    if (!chk_args (dest_ptr, dest_width, dest_height, dest_pitch,
        dest_x, dest_y, dest_dx, dest_dy, pY, src_width, src_height,
        yPitch, src_x, src_y, src_dx, src_dy, &scale_x, &scale_y))
        return -1;

    /* remove odd destination columns: */
    if (!adjust_range (&dest_x, &dest_dx, &src_x, &src_dx, scale_x))
        return 0;

    /* check if we have misaligned input: */
    if (src_x & 1)
        return -1;                          /* can't shift chromas */

    /* check if bottop-up images: */
    if (dest_pitch < 0) dest_ptr -= (dest_height-1) * dest_pitch;
    if (yPitch <= 0 ||
        uPitch <= 0 ||
        vPitch <= 0)
        return -1;          /* not supported */

    /* check if 1:1 scale: */
    if (scale_x == 1 && scale_y == 1) {

        /* check if no color adjustments: */
        if (!(is_alpha | is_beta | is_gamma | is_kappa)) {

            /* no color adjustments: */
            unsigned char *sy, *sv, *su, *d;
            register int i, j;

            /* get pointers: */
            sy = pY + src_x + src_y * yPitch;           /* luma offset */
            su = pU + (src_x/2 + src_y/2 * uPitch);
            sv = pV + (src_x/2 + src_y/2 * vPitch);
            d  = dest_ptr + dest_x * 2 + dest_y * dest_pitch;   /* 2 bytes/pixel */

#if (defined(_M_IX86) || defined(_USE_MMX_BLENDERS))  && !defined(WINCE_EMULATOR)
            /* check if we can use MMX-optimized code here: */
            if (_x86_MMX_Available)
            {
                /* process top line (if chroma is not pairable): */
                if (dest_y & 1) {
                    _MMX_lineI420toYUY2 (sy, su, sv, d, dest_dx);
                    sy += yPitch;
                    su += uPitch;
                    sv += vPitch;
                    d  += dest_pitch;
                    dest_dy --;
                }
                /* the main loop (processes two lines a time): */
                for (i = 0; i < dest_dy/2; i ++) {
                    _MMX_lineI420toYUY2 (sy, su, sv, d, dest_dx);
                    sy += yPitch;
                    d  += dest_pitch;
                    _MMX_lineI420toYUY2 (sy, su, sv, d, dest_dx);
                    sy += yPitch;
                    su += uPitch;
                    sv += vPitch;
                    d  += dest_pitch;
                }
                /* process the last line (if dy is odd): */
                if (dest_dy & 1) {
                    _MMX_lineI420toYUY2 (sy, su, sv, d, dest_dx);
                }
                /* end of MMX code */
#if defined(_M_IX86) && !defined(WINCE_EMULATOR)                
                __asm emms
#elif defined(_USE_MMX_BLENDERS) && !defined(WINCE_EMULATOR)
               __asm__ __volatile__ ( "emms" );
#endif                    
            } else
#endif
#ifdef _MACINTOSH
            /* check if we can use MMX-optimized code here: */
            if (_AltiVec_Available)