static int decode_13(AVCodecContext *avctx, DxaDecContext *c, uint8_t* dst,

                     int stride, uint8_t *src, uint8_t *ref)

{

    uint8_t *code, *data, *mv, *msk, *tmp, *tmp2;

    int i, j, k;

    int type, x, y, d, d2;

    uint32_t mask;



    code = src  + 12;

    data = code + ((avctx->width * avctx->height) >> 4);

    mv   = data + AV_RB32(src + 0);

    msk  = mv   + AV_RB32(src + 4);



    for(j = 0; j < avctx->height; j += 4){

        for(i = 0; i < avctx->width; i += 4){

            tmp  = dst + i;

            tmp2 = ref + i;

            type = *code++;

            switch(type){

            case 4: // motion compensation

                x = (*mv) >> 4;    if(x & 8) x = 8 - x;

                y = (*mv++) & 0xF; if(y & 8) y = 8 - y;

                if (i < -x || avctx->width  - i - 4 < x ||

                    j < -y || avctx->height - j - 4 < y) {

                    av_log(avctx, AV_LOG_ERROR, "MV %d %d out of bounds\n", x,y);

                    return AVERROR_INVALIDDATA;

                }

                tmp2 += x + y*stride;

            case 0: // skip

            case 5: // skip in method 12

                for(y = 0; y < 4; y++){

                    memcpy(tmp, tmp2, 4);

                    tmp  += stride;

                    tmp2 += stride;

                }

                break;

            case 1:  // masked change

            case 10: // masked change with only half of pixels changed

            case 11: // cases 10-15 are for method 12 only

            case 12:

            case 13:

            case 14:

            case 15:

                if(type == 1){

                    mask = AV_RB16(msk);

                    msk += 2;

                }else{

                    type -= 10;

                    mask = ((msk[0] & 0xF0) << shift1[type]) | ((msk[0] & 0xF) << shift2[type]);

                    msk++;

                }

                for(y = 0; y < 4; y++){

                    for(x = 0; x < 4; x++){

                        tmp[x] = (mask & 0x8000) ? *data++ : tmp2[x];

                        mask <<= 1;

                    }

                    tmp  += stride;

                    tmp2 += stride;

                }

                break;

            case 2: // fill block

                for(y = 0; y < 4; y++){

                    memset(tmp, data[0], 4);

                    tmp += stride;

                }

                data++;

                break;

            case 3: // raw block

                for(y = 0; y < 4; y++){

                    memcpy(tmp, data, 4);

                    data += 4;

                    tmp  += stride;

                }

                break;

            case 8: // subblocks - method 13 only

                mask = *msk++;

                for(k = 0; k < 4; k++){

                    d  = ((k & 1) << 1) + ((k & 2) * stride);

                    d2 = ((k & 1) << 1) + ((k & 2) * stride);

                    tmp2 = ref + i + d2;

                    switch(mask & 0xC0){

                    case 0x80: // motion compensation

                        x = (*mv) >> 4;    if(x & 8) x = 8 - x;

                        y = (*mv++) & 0xF; if(y & 8) y = 8 - y;

                        if (i + 2*(k & 1) < -x || avctx->width  - i - 2*(k & 1) - 2 < x ||

                            j +   (k & 2) < -y || avctx->height - j -   (k & 2) - 2 < y) {

                            av_log(avctx, AV_LOG_ERROR, "MV %d %d out of bounds\n", x,y);

                            return AVERROR_INVALIDDATA;

                        }

                        tmp2 += x + y*stride;

                    case 0x00: // skip

                        tmp[d + 0         ] = tmp2[0];

                        tmp[d + 1         ] = tmp2[1];

                        tmp[d + 0 + stride] = tmp2[0 + stride];

                        tmp[d + 1 + stride] = tmp2[1 + stride];

                        break;

                    case 0x40: // fill

                        tmp[d + 0         ] = data[0];

                        tmp[d + 1         ] = data[0];

                        tmp[d + 0 + stride] = data[0];

                        tmp[d + 1 + stride] = data[0];

                        data++;

                        break;

                    case 0xC0: // raw

                        tmp[d + 0         ] = *data++;

                        tmp[d + 1         ] = *data++;

                        tmp[d + 0 + stride] = *data++;

                        tmp[d + 1 + stride] = *data++;

                        break;

                    }

                    mask <<= 2;

                }

                break;

            case 32: // vector quantization - 2 colors

                mask = AV_RB16(msk);

                msk += 2;

                for(y = 0; y < 4; y++){

                    for(x = 0; x < 4; x++){

                        tmp[x] = data[mask & 1];

                        mask >>= 1;

                    }

                    tmp  += stride;

                    tmp2 += stride;

                }

                data += 2;

                break;

            case 33: // vector quantization - 3 or 4 colors

            case 34:

                mask = AV_RB32(msk);

                msk += 4;

                for(y = 0; y < 4; y++){

                    for(x = 0; x < 4; x++){

                        tmp[x] = data[mask & 3];

                        mask >>= 2;

                    }

                    tmp  += stride;

                    tmp2 += stride;

                }

                data += type - 30;

                break;

            default:

                av_log(avctx, AV_LOG_ERROR, "Unknown opcode %d\n", type);

                return AVERROR_INVALIDDATA;

            }

        }

        dst += stride * 4;

        ref += stride * 4;

    }

    return 0;

}

static int decode_13(AVCodecContext *avctx, DxaDecContext *c, uint8_t* dst,

                     int stride, uint8_t *src, uint8_t *ref)

{

    uint8_t *code, *data, *mv, *msk, *tmp, *tmp2;

    int i, j, k;

    int type, x, y, d, d2;

    uint32_t mask;



    code = src  + 12;

    data = code + ((avctx->width * avctx->height) >> 4);

    mv   = data + AV_RB32(src + 0);

    msk  = mv   + AV_RB32(src + 4);



    for(j = 0; j < avctx->height; j += 4){

        for(i = 0; i < avctx->width; i += 4){

            tmp  = dst + i;

            tmp2 = ref + i;

            type = *code++;

            switch(type){

            case 4: 

                x = (*mv) >> 4;    if(x & 8) x = 8 - x;

                y = (*mv++) & 0xF; if(y & 8) y = 8 - y;

                if (i < -x || avctx->width  - i - 4 < x ||

                    j < -y || avctx->height - j - 4 < y) {

                    av_log(avctx, AV_LOG_ERROR, "MV %d %d out of bounds\n", x,y);

                    return AVERROR_INVALIDDATA;

                }

                tmp2 += x + y*stride;

            case 0: 

            case 5:  in method 12

                for(y = 0; y < 4; y++){

                    memcpy(tmp, tmp2, 4);

                    tmp  += stride;

                    tmp2 += stride;

                }

                break;

            case 1:  

            case 10:  with only half of pixels changed

            case 11: 

            case 12:

            case 13:

            case 14:

            case 15:

                if(type == 1){

                    mask = AV_RB16(msk);

                    msk += 2;

                }else{

                    type -= 10;

                    mask = ((msk[0] & 0xF0) << shift1[type]) | ((msk[0] & 0xF) << shift2[type]);

                    msk++;

                }

                for(y = 0; y < 4; y++){

                    for(x = 0; x < 4; x++){

                        tmp[x] = (mask & 0x8000) ? *data++ : tmp2[x];

                        mask <<= 1;

                    }

                    tmp  += stride;

                    tmp2 += stride;

                }

                break;

            case 2: 

                for(y = 0; y < 4; y++){

                    memset(tmp, data[0], 4);

                    tmp += stride;

                }

                data++;

                break;

            case 3: 

                for(y = 0; y < 4; y++){

                    memcpy(tmp, data, 4);

                    data += 4;

                    tmp  += stride;

                }

                break;

            case 8: 

                mask = *msk++;

                for(k = 0; k < 4; k++){

                    d  = ((k & 1) << 1) + ((k & 2) * stride);

                    d2 = ((k & 1) << 1) + ((k & 2) * stride);

                    tmp2 = ref + i + d2;

                    switch(mask & 0xC0){

                    case 0x80: 

                        x = (*mv) >> 4;    if(x & 8) x = 8 - x;

                        y = (*mv++) & 0xF; if(y & 8) y = 8 - y;

                        if (i + 2*(k & 1) < -x || avctx->width  - i - 2*(k & 1) - 2 < x ||

                            j +   (k & 2) < -y || avctx->height - j -   (k & 2) - 2 < y) {

                            av_log(avctx, AV_LOG_ERROR, "MV %d %d out of bounds\n", x,y);

                            return AVERROR_INVALIDDATA;

                        }

                        tmp2 += x + y*stride;

                    case 0x00: 

                        tmp[d + 0         ] = tmp2[0];

                        tmp[d + 1         ] = tmp2[1];

                        tmp[d + 0 + stride] = tmp2[0 + stride];

                        tmp[d + 1 + stride] = tmp2[1 + stride];

                        break;

                    case 0x40: 

                        tmp[d + 0         ] = data[0];

                        tmp[d + 1         ] = data[0];

                        tmp[d + 0 + stride] = data[0];

                        tmp[d + 1 + stride] = data[0];

                        data++;

                        break;

                    case 0xC0: 

                        tmp[d + 0         ] = *data++;

                        tmp[d + 1         ] = *data++;

                        tmp[d + 0 + stride] = *data++;

                        tmp[d + 1 + stride] = *data++;

                        break;

                    }

                    mask <<= 2;

                }

                break;

            case 32: 

                mask = AV_RB16(msk);

                msk += 2;

                for(y = 0; y < 4; y++){

                    for(x = 0; x < 4; x++){

                        tmp[x] = data[mask & 1];

                        mask >>= 1;

                    }

                    tmp  += stride;

                    tmp2 += stride;

                }

                data += 2;

                break;

            case 33: 

            case 34:

                mask = AV_RB32(msk);

                msk += 4;

                for(y = 0; y < 4; y++){

                    for(x = 0; x < 4; x++){

                        tmp[x] = data[mask & 3];

                        mask >>= 2;

                    }

                    tmp  += stride;

                    tmp2 += stride;

                }

                data += type - 30;

                break;

            default:

                av_log(avctx, AV_LOG_ERROR, "Unknown opcode %d\n", type);

                return AVERROR_INVALIDDATA;

            }

        }

        dst += stride * 4;

        ref += stride * 4;

    }

    return 0;

}

                     int stride, uint8_t *src, uint8_t *ref)
static int FUNC_0(AVCodecContext *VAR_0, DxaDecContext *VAR_1, uint8_t* VAR_2,

                     int VAR_3, uint8_t *VAR_4, uint8_t *VAR_5)

{

    uint8_t *code, *data, *mv, *msk, *tmp, *tmp2;

    int VAR_6, VAR_7, VAR_8;

    int VAR_9, VAR_10, VAR_11, VAR_12, VAR_13;

    uint32_t mask;



    code = VAR_4  + 12;

    data = code + ((VAR_0->width * VAR_0->height) >> 4);

    mv   = data + AV_RB32(VAR_4 + 0);

    msk  = mv   + AV_RB32(VAR_4 + 4);



    for(VAR_7 = 0; VAR_7 < VAR_0->height; VAR_7 += 4){

        for(VAR_6 = 0; VAR_6 < VAR_0->width; VAR_6 += 4){

            tmp  = VAR_2 + VAR_6;

            tmp2 = VAR_5 + VAR_6;

            VAR_9 = *code++;

            switch(VAR_9){

            case 4: 

                VAR_10 = (*mv) >> 4;    if(VAR_10 & 8) VAR_10 = 8 - VAR_10;

                VAR_11 = (*mv++) & 0xF; if(VAR_11 & 8) VAR_11 = 8 - VAR_11;

                if (VAR_6 < -VAR_10 || VAR_0->width  - VAR_6 - 4 < VAR_10 ||

                    VAR_7 < -VAR_11 || VAR_0->height - VAR_7 - 4 < VAR_11) {

                    av_log(VAR_0, AV_LOG_ERROR, "MV %VAR_12 %VAR_12 out of bounds\n", VAR_10,VAR_11);

                    return AVERROR_INVALIDDATA;

                }

                tmp2 += VAR_10 + VAR_11*VAR_3;

            case 0: 

            case 5:  in method 12

                for(VAR_11 = 0; VAR_11 < 4; VAR_11++){

                    memcpy(tmp, tmp2, 4);

                    tmp  += VAR_3;

                    tmp2 += VAR_3;

                }

                break;

            case 1:  

            case 10:  with only half of pixels changed

            case 11: 

            case 12:

            case 13:

            case 14:

            case 15:

                if(VAR_9 == 1){

                    mask = AV_RB16(msk);

                    msk += 2;

                }else{

                    VAR_9 -= 10;

                    mask = ((msk[0] & 0xF0) << shift1[VAR_9]) | ((msk[0] & 0xF) << shift2[VAR_9]);

                    msk++;

                }

                for(VAR_11 = 0; VAR_11 < 4; VAR_11++){

                    for(VAR_10 = 0; VAR_10 < 4; VAR_10++){

                        tmp[VAR_10] = (mask & 0x8000) ? *data++ : tmp2[VAR_10];

                        mask <<= 1;

                    }

                    tmp  += VAR_3;

                    tmp2 += VAR_3;

                }

                break;

            case 2: 

                for(VAR_11 = 0; VAR_11 < 4; VAR_11++){

                    memset(tmp, data[0], 4);

                    tmp += VAR_3;

                }

                data++;

                break;

            case 3: 

                for(VAR_11 = 0; VAR_11 < 4; VAR_11++){

                    memcpy(tmp, data, 4);

                    data += 4;

                    tmp  += VAR_3;

                }

                break;

            case 8: 

                mask = *msk++;

                for(VAR_8 = 0; VAR_8 < 4; VAR_8++){

                    VAR_12  = ((VAR_8 & 1) << 1) + ((VAR_8 & 2) * VAR_3);

                    VAR_13 = ((VAR_8 & 1) << 1) + ((VAR_8 & 2) * VAR_3);

                    tmp2 = VAR_5 + VAR_6 + VAR_13;

                    switch(mask & 0xC0){

                    case 0x80: 

                        VAR_10 = (*mv) >> 4;    if(VAR_10 & 8) VAR_10 = 8 - VAR_10;

                        VAR_11 = (*mv++) & 0xF; if(VAR_11 & 8) VAR_11 = 8 - VAR_11;

                        if (VAR_6 + 2*(VAR_8 & 1) < -VAR_10 || VAR_0->width  - VAR_6 - 2*(VAR_8 & 1) - 2 < VAR_10 ||

                            VAR_7 +   (VAR_8 & 2) < -VAR_11 || VAR_0->height - VAR_7 -   (VAR_8 & 2) - 2 < VAR_11) {

                            av_log(VAR_0, AV_LOG_ERROR, "MV %VAR_12 %VAR_12 out of bounds\n", VAR_10,VAR_11);

                            return AVERROR_INVALIDDATA;

                        }

                        tmp2 += VAR_10 + VAR_11*VAR_3;

                    case 0x00: 

                        tmp[VAR_12 + 0         ] = tmp2[0];

                        tmp[VAR_12 + 1         ] = tmp2[1];

                        tmp[VAR_12 + 0 + VAR_3] = tmp2[0 + VAR_3];

                        tmp[VAR_12 + 1 + VAR_3] = tmp2[1 + VAR_3];

                        break;

                    case 0x40: 

                        tmp[VAR_12 + 0         ] = data[0];

                        tmp[VAR_12 + 1         ] = data[0];

                        tmp[VAR_12 + 0 + VAR_3] = data[0];

                        tmp[VAR_12 + 1 + VAR_3] = data[0];

                        data++;

                        break;

                    case 0xC0: 

                        tmp[VAR_12 + 0         ] = *data++;

                        tmp[VAR_12 + 1         ] = *data++;

                        tmp[VAR_12 + 0 + VAR_3] = *data++;

                        tmp[VAR_12 + 1 + VAR_3] = *data++;

                        break;

                    }

                    mask <<= 2;

                }

                break;

            case 32: 

                mask = AV_RB16(msk);

                msk += 2;

                for(VAR_11 = 0; VAR_11 < 4; VAR_11++){

                    for(VAR_10 = 0; VAR_10 < 4; VAR_10++){

                        tmp[VAR_10] = data[mask & 1];

                        mask >>= 1;

                    }

                    tmp  += VAR_3;

                    tmp2 += VAR_3;

                }

                data += 2;

                break;

            case 33: 

            case 34:

                mask = AV_RB32(msk);

                msk += 4;

                for(VAR_11 = 0; VAR_11 < 4; VAR_11++){

                    for(VAR_10 = 0; VAR_10 < 4; VAR_10++){

                        tmp[VAR_10] = data[mask & 3];

                        mask >>= 2;

                    }

                    tmp  += VAR_3;

                    tmp2 += VAR_3;

                }

                data += VAR_9 - 30;

                break;

            default:

                av_log(VAR_0, AV_LOG_ERROR, "Unknown opcode %VAR_12\n", VAR_9);

                return AVERROR_INVALIDDATA;

            }

        }

        VAR_2 += VAR_3 * 4;

        VAR_5 += VAR_3 * 4;

    }

    return 0;

}

static int FUNC_0(AVCodecContext *VAR_0, DxaDecContext *VAR_1, uint8_t* VAR_2,
int VAR_3, uint8_t *VAR_4, uint8_t *VAR_5)
{ uint8_t *code, *data, *mv, *msk, *tmp, *tmp2; int VAR_6, VAR_7, VAR_8; int VAR_9, VAR_10, VAR_11, VAR_12, VAR_13; uint32_t mask; code = VAR_4  + 12; data = code + ((VAR_0->width * VAR_0->height) >> 4); mv   = data + AV_RB32(VAR_4 + 0); msk  = mv   + AV_RB32(VAR_4 + 4); for(VAR_7 = 0; VAR_7 < VAR_0->height; VAR_7 += 4){ for(VAR_6 = 0; VAR_6 < VAR_0->width; VAR_6 += 4){ tmp  = VAR_2 + VAR_6; tmp2 = VAR_5 + VAR_6; VAR_9 = *code++; switch(VAR_9){ case 4:
VAR_10 = (*mv) >> 4;    if(VAR_10 & 8) VAR_10 = 8 - VAR_10; VAR_11 = (*mv++) & 0xF; if(VAR_11 & 8) VAR_11 = 8 - VAR_11; if (VAR_6 < -VAR_10 || VAR_0->width  - VAR_6 - 4 < VAR_10 ||
VAR_7 < -VAR_11 || VAR_0->height - VAR_7 - 4 < VAR_11) { av_log(VAR_0, AV_LOG_ERROR, "MV %VAR_12 %VAR_12 out of bounds\n", VAR_10,VAR_11); return AVERROR_INVALIDDATA; } tmp2 += VAR_10 + VAR_11*VAR_3; case 0:
case 5:  in method 12
for(VAR_11 = 0; VAR_11 < 4; VAR_11++){ memcpy(tmp, tmp2, 4); tmp  += VAR_3; tmp2 += VAR_3; } break; case 1:
case 10:  with only half of pixels changed
case 11:
case 12:
case 13:
case 14:
case 15:
if(VAR_9 == 1){ mask = AV_RB16(msk); msk += 2; }else{ VAR_9 -= 10; mask = ((msk[0] & 0xF0) << shift1[VAR_9]) | ((msk[0] & 0xF) << shift2[VAR_9]); msk++; } for(VAR_11 = 0; VAR_11 < 4; VAR_11++){ for(VAR_10 = 0; VAR_10 < 4; VAR_10++){ tmp[VAR_10] = (mask & 0x8000) ? *data++ : tmp2[VAR_10]; mask <<= 1; } tmp  += VAR_3; tmp2 += VAR_3; } break; case 2:
for(VAR_11 = 0; VAR_11 < 4; VAR_11++){ memset(tmp, data[0], 4); tmp += VAR_3; } data++; break; case 3:
for(VAR_11 = 0; VAR_11 < 4; VAR_11++){ memcpy(tmp, data, 4); data += 4; tmp  += VAR_3; } break; case 8:
mask = *msk++; for(VAR_8 = 0; VAR_8 < 4; VAR_8++){ VAR_12  = ((VAR_8 & 1) << 1) + ((VAR_8 & 2) * VAR_3); VAR_13 = ((VAR_8 & 1) << 1) + ((VAR_8 & 2) * VAR_3); tmp2 = VAR_5 + VAR_6 + VAR_13; switch(mask & 0xC0){ case 0x80:
VAR_10 = (*mv) >> 4;    if(VAR_10 & 8) VAR_10 = 8 - VAR_10; VAR_11 = (*mv++) & 0xF; if(VAR_11 & 8) VAR_11 = 8 - VAR_11; if (VAR_6 + 2*(VAR_8 & 1) < -VAR_10 || VAR_0->width  - VAR_6 - 2*(VAR_8 & 1) - 2 < VAR_10 ||
VAR_7 +   (VAR_8 & 2) < -VAR_11 || VAR_0->height - VAR_7 -   (VAR_8 & 2) - 2 < VAR_11) { av_log(VAR_0, AV_LOG_ERROR, "MV %VAR_12 %VAR_12 out of bounds\n", VAR_10,VAR_11); return AVERROR_INVALIDDATA; } tmp2 += VAR_10 + VAR_11*VAR_3; case 0x00:
tmp[VAR_12 + 0         ] = tmp2[0]; tmp[VAR_12 + 1         ] = tmp2[1]; tmp[VAR_12 + 0 + VAR_3] = tmp2[0 + VAR_3]; tmp[VAR_12 + 1 + VAR_3] = tmp2[1 + VAR_3]; break; case 0x40:
tmp[VAR_12 + 0         ] = data[0]; tmp[VAR_12 + 1         ] = data[0]; tmp[VAR_12 + 0 + VAR_3] = data[0]; tmp[VAR_12 + 1 + VAR_3] = data[0]; data++; break; case 0xC0:
tmp[VAR_12 + 0         ] = *data++; tmp[VAR_12 + 1         ] = *data++; tmp[VAR_12 + 0 + VAR_3] = *data++; tmp[VAR_12 + 1 + VAR_3] = *data++; break; } mask <<= 2; } break; case 32:
mask = AV_RB16(msk); msk += 2; for(VAR_11 = 0; VAR_11 < 4; VAR_11++){ for(VAR_10 = 0; VAR_10 < 4; VAR_10++){ tmp[VAR_10] = data[mask & 1]; mask >>= 1; } tmp  += VAR_3; tmp2 += VAR_3; } data += 2; break; case 33:
case 34:
mask = AV_RB32(msk); msk += 4; for(VAR_11 = 0; VAR_11 < 4; VAR_11++){ for(VAR_10 = 0; VAR_10 < 4; VAR_10++){ tmp[VAR_10] = data[mask & 3]; mask >>= 2; } tmp  += VAR_3; tmp2 += VAR_3; } data += VAR_9 - 30; break; default:
av_log(VAR_0, AV_LOG_ERROR, "Unknown opcode %VAR_12\n", VAR_9); return AVERROR_INVALIDDATA; } } VAR_2 += VAR_3 * 4; VAR_5 += VAR_3 * 4; } return 0; }