sceJpegMJpegCscWithColorOption

// Converts YCbCr to RGB
int sceJpegMJpegCscWithColorOption(void *dst, void *srcbuff, unsigned int width_height, unsigned int stride, unsigned int param_5)
{
    int ret;
    SceDmacPlusCscParams *cscparams;
    int display_colorfmt;
    uint colorfmt;
    uint height, width;
    uint y_plane_half, u_v_plane_half;
    uint dst_buff_half_size;
    int in_k1;
    SceMpegYCrCbBuffer srcparams;

    width = (width_height >> 16) & 0xfff;
    height = width_height & 0xfff;
    display_colorfmt = param_5 & 0xf;

    if ((stride > 1024) || (width > 720) || (height > 480)) {
        return SCE_JPEG_ERROR_UNSUPPORT_IMAGE_SIZE;
    }

    if (display_colorfmt == PSP_DISPLAY_PIXEL_FORMAT_565) {
        colorfmt = SCE_DMACPLUS_LCDC_FORMAT_RGB565;
    } else if (display_colorfmt == PSP_DISPLAY_PIXEL_FORMAT_5551) {
        colorfmt = SCE_DMACPLUS_LCDC_FORMAT_RGBA5551;
    } else if (display_colorfmt == PSP_DISPLAY_PIXEL_FORMAT_4444) {
        colorfmt = SCE_DMACPLUS_LCDC_FORMAT_RGBA4444;
    } else if (display_colorfmt == PSP_DISPLAY_PIXEL_FORMAT_8888) {
        colorfmt = SCE_DMACPLUS_LCDC_FORMAT_RGBA8888;
    } else {
        return SCE_JPEG_ERROR_INVALID_COLOR_FORMAT;
    }

    if (sceKernelGetCompiledSdkVersion() < 0x6030011) {
        colorfmt = colorfmt << 1;
    }

    if ((uint)((int)param_5 >> 4) >= 2) {
        return SCE_JPEG_ERROR_INVALID_COLOR_FORMAT;
    }

    if ((width & 0x70) == 0x70) {
        width = width + 0x10;
    }

    // YUV 4:2:0: for a 2×2 square of pixels, 4 Y samples, 1 U sample and 1 V sample
    y_plane_half = (width * height) / 2;
    u_v_plane_half = (width * height) / 8;

    if (((int)(in_k1 << 0xb & (uint)srcbuff) < 0) || ((int)(in_k1 << 0xb & (uint)dst) < 0)) {
        ret = SCE_ERROR_PRIV_REQUIRED;
    } else {
        dst_buff_half_size = stride * height;
        if (colorfmt == SCE_DMACPLUS_LCDC_FORMAT_RGBA8888) {
            dst_buff_half_size *= 2;
        }
        srcparams.iFrameBufferWidth16 = width / 16;
        srcparams.iFrameBufferHeight16 = height / 16;
        srcparams.pYBuffer   = srcbuff;
        srcparams.pYBuffer2  = (void *)((char *)srcbuff              + y_plane_half);
        srcparams.pCrBuffer  = (void *)((char *)srcparams.pYBuffer2  + y_plane_half);
        srcparams.pCrBuffer2 = (void *)((char *)srcparams.pCrBuffer  + u_v_plane_half);
        srcparams.pCbBuffer  = (void *)((char *)srcparams.pCrBuffer2 + u_v_plane_half);
        srcparams.pCbBuffer2 = (void *)((char *)srcparams.pCbBuffer  + u_v_plane_half);
        srcparams.iUnknown   = 0;
        srcparams.iUnknown2  = 1;
        sceKernelDcacheInvalidateRange(dst, dst_buff_half_size * 2);
        if ((int)param_5 >> 4 == 0) {
            cscparams = &csc_YCbCr_to_RGB_full_range;
        } else {
            cscparams = &csc_YCbCr_to_RGB_SDTV;
        }
        dmacplus_set_csc_matrix(colorfmt, stride, cscparams);
        ret = dmacplus_trigger_memcpy3(dst, (char *)dst + dst_buff_half_size, &srcparams);
        sceKernelUnlockMutex(g_SceMpegBaseCSC_mutex, 1);
    }

    return ret;
}