swscale.c

ffmpeg移植到symbian的全部源代码

    void (*conv)(const uint8_t *src, uint8_t *dst, long src_size)=NULL;

    /* BGR -> BGR */
    if (  (isBGR(srcFormat) && isBGR(dstFormat))
       || (isRGB(srcFormat) && isRGB(dstFormat))){
        switch(srcId | (dstId<<4)){
        case 0x34: conv= rgb16to15; break;
        case 0x36: conv= rgb24to15; break;
        case 0x38: conv= rgb32to15; break;
        case 0x43: conv= rgb15to16; break;
        case 0x46: conv= rgb24to16; break;
        case 0x48: conv= rgb32to16; break;
        case 0x63: conv= rgb15to24; break;
        case 0x64: conv= rgb16to24; break;
        case 0x68: conv= rgb32to24; break;
        case 0x83: conv= rgb15to32; break;
        case 0x84: conv= rgb16to32; break;
        case 0x86: conv= rgb24to32; break;
        default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
                        sws_format_name(srcFormat), sws_format_name(dstFormat)); break;
        }
    }else if (  (isBGR(srcFormat) && isRGB(dstFormat))
             || (isRGB(srcFormat) && isBGR(dstFormat))){
        switch(srcId | (dstId<<4)){
        case 0x33: conv= rgb15tobgr15; break;
        case 0x34: conv= rgb16tobgr15; break;
        case 0x36: conv= rgb24tobgr15; break;
        case 0x38: conv= rgb32tobgr15; break;
        case 0x43: conv= rgb15tobgr16; break;
        case 0x44: conv= rgb16tobgr16; break;
        case 0x46: conv= rgb24tobgr16; break;
        case 0x48: conv= rgb32tobgr16; break;
        case 0x63: conv= rgb15tobgr24; break;
        case 0x64: conv= rgb16tobgr24; break;
        case 0x66: conv= rgb24tobgr24; break;
        case 0x68: conv= rgb32tobgr24; break;
        case 0x83: conv= rgb15tobgr32; break;
        case 0x84: conv= rgb16tobgr32; break;
        case 0x86: conv= rgb24tobgr32; break;
        case 0x88: conv= rgb32tobgr32; break;
        default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
                        sws_format_name(srcFormat), sws_format_name(dstFormat)); break;
        }
    }else{
        av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
               sws_format_name(srcFormat), sws_format_name(dstFormat));
    }

    if(conv)
    {
        if (dstStride[0]*srcBpp == srcStride[0]*dstBpp && srcStride[0] > 0)
            conv(src[0], dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);
        else
        {
            int i;
            uint8_t *srcPtr= src[0];
            uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

            for (i=0; i<srcSliceH; i++)
            {
                conv(srcPtr, dstPtr, c->srcW*srcBpp);
                srcPtr+= srcStride[0];
                dstPtr+= dstStride[0];
            }
        }
    }
    return srcSliceH;
}

static int bgr24toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
                              int srcSliceH, uint8_t* dst[], int dstStride[]){

    rgb24toyv12(
        src[0],
        dst[0]+ srcSliceY    *dstStride[0],
        dst[1]+(srcSliceY>>1)*dstStride[1],
        dst[2]+(srcSliceY>>1)*dstStride[2],
        c->srcW, srcSliceH,
        dstStride[0], dstStride[1], srcStride[0]);
    return srcSliceH;
}

static int yvu9toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
                             int srcSliceH, uint8_t* dst[], int dstStride[]){
    int i;

    /* copy Y */
    if (srcStride[0]==dstStride[0] && srcStride[0] > 0)
        memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);
    else{
        uint8_t *srcPtr= src[0];
        uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

        for (i=0; i<srcSliceH; i++)
        {
            memcpy(dstPtr, srcPtr, c->srcW);
            srcPtr+= srcStride[0];
            dstPtr+= dstStride[0];
        }
    }

    if (c->dstFormat==PIX_FMT_YUV420P){
        planar2x(src[1], dst[1], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[1]);
        planar2x(src[2], dst[2], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[2]);
    }else{
        planar2x(src[1], dst[2], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[2]);
        planar2x(src[2], dst[1], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[1]);
    }
    return srcSliceH;
}

/* unscaled copy like stuff (assumes nearly identical formats) */
static int packedCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
                      int srcSliceH, uint8_t* dst[], int dstStride[])
{
    if (dstStride[0]==srcStride[0] && srcStride[0] > 0)
        memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);
    else
    {
        int i;
        uint8_t *srcPtr= src[0];
        uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;
        int length=0;

        /* universal length finder */
        while(length+c->srcW <= FFABS(dstStride[0])
           && length+c->srcW <= FFABS(srcStride[0])) length+= c->srcW;
        assert(length!=0);

        for (i=0; i<srcSliceH; i++)
        {
            memcpy(dstPtr, srcPtr, length);
            srcPtr+= srcStride[0];
            dstPtr+= dstStride[0];
        }
    }
    return srcSliceH;
}

static int planarCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
                      int srcSliceH, uint8_t* dst[], int dstStride[])
{
    int plane;
    for (plane=0; plane<3; plane++)
    {
        int length= plane==0 ? c->srcW  : -((-c->srcW  )>>c->chrDstHSubSample);
        int y=      plane==0 ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);
        int height= plane==0 ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);

        if ((isGray(c->srcFormat) || isGray(c->dstFormat)) && plane>0)
        {
            if (!isGray(c->dstFormat))
                memset(dst[plane], 128, dstStride[plane]*height);
        }
        else
        {
            if (dstStride[plane]==srcStride[plane] && srcStride[plane] > 0)
                memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);
            else
            {
                int i;
                uint8_t *srcPtr= src[plane];
                uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;
                for (i=0; i<height; i++)
                {
                    memcpy(dstPtr, srcPtr, length);
                    srcPtr+= srcStride[plane];
                    dstPtr+= dstStride[plane];
                }
            }
        }
    }
    return srcSliceH;
}

static int gray16togray(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
                        int srcSliceH, uint8_t* dst[], int dstStride[]){

    int length= c->srcW;
    int y=      srcSliceY;
    int height= srcSliceH;
    int i, j;
    uint8_t *srcPtr= src[0];
    uint8_t *dstPtr= dst[0] + dstStride[0]*y;

    if (!isGray(c->dstFormat)){
        int height= -((-srcSliceH)>>c->chrDstVSubSample);
        memset(dst[1], 128, dstStride[1]*height);
        memset(dst[2], 128, dstStride[2]*height);
    }
    if (c->srcFormat == PIX_FMT_GRAY16LE) srcPtr++;
    for (i=0; i<height; i++)
    {
        for (j=0; j<length; j++) dstPtr[j] = srcPtr[j<<1];
        srcPtr+= srcStride[0];
        dstPtr+= dstStride[0];
    }
    return srcSliceH;
}

static int graytogray16(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
                        int srcSliceH, uint8_t* dst[], int dstStride[]){

    int length= c->srcW;
    int y=      srcSliceY;
    int height= srcSliceH;
    int i, j;
    uint8_t *srcPtr= src[0];
    uint8_t *dstPtr= dst[0] + dstStride[0]*y;
    for (i=0; i<height; i++)
    {
        for (j=0; j<length; j++)
        {
            dstPtr[j<<1] = srcPtr[j];
            dstPtr[(j<<1)+1] = srcPtr[j];
        }
        srcPtr+= srcStride[0];
        dstPtr+= dstStride[0];
    }
    return srcSliceH;
}

static int gray16swap(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
                      int srcSliceH, uint8_t* dst[], int dstStride[]){

    int length= c->srcW;
    int y=      srcSliceY;
    int height= srcSliceH;
    int i, j;
    uint16_t *srcPtr= (uint16_t*)src[0];
    uint16_t *dstPtr= (uint16_t*)(dst[0] + dstStride[0]*y/2);
    for (i=0; i<height; i++)
    {
        for (j=0; j<length; j++) dstPtr[j] = bswap_16(srcPtr[j]);
        srcPtr+= srcStride[0]/2;
        dstPtr+= dstStride[0]/2;
    }
    return srcSliceH;
}


static void getSubSampleFactors(int *h, int *v, int format){
    switch(format){
    case PIX_FMT_UYVY422:
    case PIX_FMT_YUYV422:
        *h=1;
        *v=0;
        break;
    case PIX_FMT_YUV420P:
    case PIX_FMT_YUVA420P:
    case PIX_FMT_GRAY16BE:
    case PIX_FMT_GRAY16LE:
    case PIX_FMT_GRAY8: //FIXME remove after different subsamplings are fully implemented
    case PIX_FMT_NV12:
    case PIX_FMT_NV21:
        *h=1;
        *v=1;
        break;
    case PIX_FMT_YUV440P:
        *h=0;
        *v=1;
        break;
    case PIX_FMT_YUV410P:
        *h=2;
        *v=2;
        break;
    case PIX_FMT_YUV444P:
        *h=0;
        *v=0;
        break;
    case PIX_FMT_YUV422P:
        *h=1;
        *v=0;
        break;
    case PIX_FMT_YUV411P:
        *h=2;
        *v=0;
        break;
    default:
        *h=0;
        *v=0;
        break;
    }
}

static uint16_t roundToInt16(int64_t f){
    int r= (f + (1<<15))>>16;
         if (r<-0x7FFF) return 0x8000;
    else if (r> 0x7FFF) return 0x7FFF;
    else                return r;
}

/**
 * @param inv_table the yuv2rgb coeffs, normally Inverse_Table_6_9[x]
 * @param fullRange if 1 then the luma range is 0..255 if 0 it is 16..235
 * @return -1 if not supported
 */
int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation){
    int64_t crv =  inv_table[0];
    int64_t cbu =  inv_table[1];
    int64_t cgu = -inv_table[2];
    int64_t cgv = -inv_table[3];
    int64_t cy  = 1<<16;
    int64_t oy  = 0;

    if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
    memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);
    memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);

    c->brightness= brightness;
    c->contrast  = contrast;
    c->saturation= saturation;
    c->srcRange  = srcRange;
    c->dstRange  = dstRange;

    c->uOffset=   0x0400040004000400LL;
    c->vOffset=   0x0400040004000400LL;

    if (!srcRange){
        cy= (cy*255) / 219;
        oy= 16<<16;
    }else{
        crv= (crv*224) / 255;
        cbu= (cbu*224) / 255;
        cgu= (cgu*224) / 255;
        cgv= (cgv*224) / 255;
    }

    cy = (cy *contrast             )>>16;
    crv= (crv*contrast * saturation)>>32;
    cbu= (cbu*contrast * saturation)>>32;
    cgu= (cgu*contrast * saturation)>>32;
    cgv= (cgv*contrast * saturation)>>32;

    oy -= 256*brightness;

    c->yCoeff=    roundToInt16(cy *8192) * 0x0001000100010001ULL;
    c->vrCoeff=   roundToInt16(crv*8192) * 0x0001000100010001ULL;
    c->ubCoeff=   roundToInt16(cbu*8192) * 0x0001000100010001ULL;
    c->vgCoeff=   roundToInt16(cgv*8192) * 0x0001000100010001ULL;
    c->ugCoeff=   roundToInt16(cgu*8192) * 0x0001000100010001ULL;
    c->yOffset=   roundToInt16(oy *   8) * 0x0001000100010001ULL;

    yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);
    //FIXME factorize

#ifdef COMPILE_ALTIVEC
    if (c->flags & SWS_CPU_CAPS_ALTIVEC)
        yuv2rgb_altivec_init_tables (c, inv_table, brightness, contrast, saturation);
#endif
    return 0;
}

/**
 * @return -1 if not supported
 */
int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation){
    if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

    *inv_table = c->srcColorspaceTable;
    *table     = c->dstColorspaceTable;
    *srcRange  = c->srcRange;
    *dstRange  = c->dstRange;
    *brightness= c->brightness;
    *contrast  = c->contrast;
    *saturation= c->saturation;

    return 0;
}

static int handle_jpeg(int *format)
{
    switch (*format) {
        case PIX_FMT_YUVJ420P:
            *format = PIX_FMT_YUV420P;
            return 1;
        case PIX_FMT_YUVJ422P:
            *format = PIX_FMT_YUV422P;
            return 1;
        case PIX_FMT_YUVJ444P:
            *format = PIX_FMT_YUV444P;
            return 1;
        case PIX_FMT_YUVJ440P:
            *format = PIX_FMT_YUV440P;
            return 1;
        default:
            return 0;
    }
}

SwsContext *sws_getContext(int srcW, int srcH, int srcForma