/* Copyright (c) 2012 - 2017, The Linux Foundation. All rights reserved.
 *
 * redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *     * redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * redistributions in binary form must reproduce the above
 *       copyright notice, this list of conditions and the following
 *       disclaimer in the documentation and/or other materials provided
 *       with the distribution.
 *     * neither the name of The Linux Foundation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * this software is provided "as is" and any express or implied
 * warranties, including, but not limited to, the implied warranties of
 * merchantability, fitness for a particular purpose and non-infringement
 * are disclaimed.  in no event shall the copyright owner or contributors
 * be liable for any direct, indirect, incidental, special, exemplary, or
 * consequential damages (including, but not limited to, procurement of
 * substitute goods or services; loss of use, data, or profits; or
 * business interruption) however caused and on any theory of liability,
 * whether in contract, strict liability, or tort (including negligence
 * or otherwise) arising in any way out of the use of this software, even
 * if advised of the possibility of such damage.
 *
 */

#include <C2DColorConverter.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <linux/msm_kgsl.h>
#include <sys/ioctl.h>
#include <utils/Log.h>
#include <dlfcn.h>
#include <string.h>
#include <errno.h>

#undef LOG_TAG
#define LOG_TAG "C2DColorConvert"
#define ALIGN( num, to ) (((num) + (to-1)) & (~(to-1)))
#define ALIGN8K 8192
#define ALIGN4K 4096
#define ALIGN2K 2048
#define ALIGN128 128
#define ALIGN32 32
#define ALIGN16 16

//-----------------------------------------------------
namespace android {

class C2DColorConverter : public C2DColorConverterBase {

public:
    C2DColorConverter(size_t srcWidth, size_t srcHeight, size_t dstWidth, size_t dstHeight, ColorConvertFormat srcFormat, ColorConvertFormat dstFormat, int32_t flags,size_t srcStride);
    int32_t getBuffReq(int32_t port, C2DBuffReq *req);
    int32_t dumpOutput(char * filename, char mode);
protected:
    virtual ~C2DColorConverter();
    virtual int convertC2D(int srcFd, void *srcBase, void * srcData, int dstFd, void *dstBase, void * dstData);

private:
    bool isYUVSurface(ColorConvertFormat format);
    void *getDummySurfaceDef(ColorConvertFormat format, size_t width, size_t height, bool isSource);
    C2D_STATUS updateYUVSurfaceDef(uint8_t *addr, void *base, void * data, bool isSource);
    C2D_STATUS updateRGBSurfaceDef(uint8_t *addr, void * data, bool isSource);
    uint32_t getC2DFormat(ColorConvertFormat format);
    size_t calcStride(ColorConvertFormat format, size_t width);
    size_t calcYSize(ColorConvertFormat format, size_t width, size_t height);
    size_t calcSize(ColorConvertFormat format, size_t width, size_t height);
    void *getMappedGPUAddr(int bufFD, void *bufPtr, size_t bufLen);
    bool unmapGPUAddr(unsigned long gAddr);
    size_t calcLumaAlign(ColorConvertFormat format);
    size_t calcSizeAlign(ColorConvertFormat format);
    C2DBytesPerPixel calcBytesPerPixel(ColorConvertFormat format);

    void *mC2DLibHandle;
    LINK_c2dCreateSurface mC2DCreateSurface;
    LINK_c2dUpdateSurface mC2DUpdateSurface;
    LINK_c2dReadSurface mC2DReadSurface;
    LINK_c2dDraw mC2DDraw;
    LINK_c2dFlush mC2DFlush;
    LINK_c2dFinish mC2DFinish;
    LINK_c2dWaitTimestamp mC2DWaitTimestamp;
    LINK_c2dDestroySurface mC2DDestroySurface;
    LINK_c2dMapAddr mC2DMapAddr;
    LINK_c2dUnMapAddr mC2DUnMapAddr;

    uint32_t mSrcSurface, mDstSurface;
    void * mSrcSurfaceDef;
    void * mDstSurfaceDef;

    C2D_OBJECT mBlit;
    size_t mSrcWidth;
    size_t mSrcHeight;
    size_t mSrcStride;
    size_t mDstWidth;
    size_t mDstHeight;
    size_t mSrcSize;
    size_t mDstSize;
    size_t mSrcYSize;
    size_t mDstYSize;
    enum ColorConvertFormat mSrcFormat;
    enum ColorConvertFormat mDstFormat;
    int32_t mFlags;

    int mError;
};

C2DColorConverter::C2DColorConverter(size_t srcWidth, size_t srcHeight, size_t dstWidth, size_t dstHeight, ColorConvertFormat srcFormat, ColorConvertFormat dstFormat, int32_t flags, size_t srcStride)
{
     mError = 0;
     mC2DLibHandle = dlopen("libC2D2.so", RTLD_NOW);
     if (!mC2DLibHandle) {
         ALOGE("FATAL ERROR: could not dlopen libc2d2.so: %s", dlerror());
         mError = -1;
         return;
     }
     mC2DCreateSurface = (LINK_c2dCreateSurface)dlsym(mC2DLibHandle, "c2dCreateSurface");
     mC2DUpdateSurface = (LINK_c2dUpdateSurface)dlsym(mC2DLibHandle, "c2dUpdateSurface");
     mC2DReadSurface = (LINK_c2dReadSurface)dlsym(mC2DLibHandle, "c2dReadSurface");
     mC2DDraw = (LINK_c2dDraw)dlsym(mC2DLibHandle, "c2dDraw");
     mC2DFlush = (LINK_c2dFlush)dlsym(mC2DLibHandle, "c2dFlush");
     mC2DFinish = (LINK_c2dFinish)dlsym(mC2DLibHandle, "c2dFinish");
     mC2DWaitTimestamp = (LINK_c2dWaitTimestamp)dlsym(mC2DLibHandle, "c2dWaitTimestamp");
     mC2DDestroySurface = (LINK_c2dDestroySurface)dlsym(mC2DLibHandle, "c2dDestroySurface");
     mC2DMapAddr = (LINK_c2dMapAddr)dlsym(mC2DLibHandle, "c2dMapAddr");
     mC2DUnMapAddr = (LINK_c2dUnMapAddr)dlsym(mC2DLibHandle, "c2dUnMapAddr");

     if (!mC2DCreateSurface || !mC2DUpdateSurface || !mC2DReadSurface
        || !mC2DDraw || !mC2DFlush || !mC2DFinish || !mC2DWaitTimestamp
        || !mC2DDestroySurface || !mC2DMapAddr || !mC2DUnMapAddr) {
         ALOGE("%s: dlsym ERROR", __FUNCTION__);
         mError = -1;
         return;
     }

    mSrcWidth = srcWidth;
    mSrcHeight = srcHeight;
    mSrcStride = srcStride;;
    mDstWidth = dstWidth;
    mDstHeight = dstHeight;
    mSrcFormat = srcFormat;
    mDstFormat = dstFormat;
    mSrcSize = calcSize(srcFormat, srcWidth, srcHeight);
    mDstSize = calcSize(dstFormat, dstWidth, dstHeight);
    mSrcYSize = calcYSize(srcFormat, srcWidth, srcHeight);
    mDstYSize = calcYSize(dstFormat, dstWidth, dstHeight);

    mFlags = flags; // can be used for rotation

    mSrcSurfaceDef = getDummySurfaceDef(srcFormat, srcWidth, srcHeight, true);
    mDstSurfaceDef = getDummySurfaceDef(dstFormat, dstWidth, dstHeight, false);

    memset((void*)&mBlit,0,sizeof(C2D_OBJECT));
    mBlit.source_rect.x = 0 << 16;
    mBlit.source_rect.y = 0 << 16;
    mBlit.source_rect.width = srcWidth << 16;
    mBlit.source_rect.height = srcHeight << 16;
    mBlit.target_rect.x = 0 << 16;
    mBlit.target_rect.y = 0 << 16;
    mBlit.target_rect.width = dstWidth << 16;
    mBlit.target_rect.height = dstHeight << 16;
    mBlit.config_mask = C2D_ALPHA_BLEND_NONE | C2D_NO_BILINEAR_BIT | C2D_NO_ANTIALIASING_BIT | C2D_TARGET_RECT_BIT;
    mBlit.surface_id = mSrcSurface;
}

C2DColorConverter::~C2DColorConverter()
{
    if (mError) {
        if (mC2DLibHandle) {
            dlclose(mC2DLibHandle);
        }
        return;
    }

    mC2DDestroySurface(mDstSurface);
    mC2DDestroySurface(mSrcSurface);

    if (mSrcSurfaceDef) {
        free(mSrcSurfaceDef);
    }

    if (mDstSurfaceDef) {
        free(mDstSurfaceDef);
    }

    dlclose(mC2DLibHandle);
}

int C2DColorConverter::convertC2D(int srcFd, void *srcBase, void * srcData, int dstFd, void *dstBase, void * dstData)
{
    C2D_STATUS ret;
    uint8_t *srcMappedGpuAddr = nullptr;
    uint8_t *dstMappedGpuAddr = nullptr;

    if (mError) {
        ALOGE("C2D library initialization failed\n");
        return mError;
    }

    if ((srcFd < 0) || (dstFd < 0) || (srcData == NULL) || (dstData == NULL)) {
        ALOGE("Incorrect input parameters\n");
        return -1;
    }

    srcMappedGpuAddr = (uint8_t *)getMappedGPUAddr(srcFd, srcData, mSrcSize);
    if (!srcMappedGpuAddr)
        return -1;

    if (isYUVSurface(mSrcFormat)) {
        ret = updateYUVSurfaceDef(srcMappedGpuAddr, srcBase, srcData, true);
    } else {
        ret = updateRGBSurfaceDef(srcMappedGpuAddr, srcData, true);
    }

    if (ret != C2D_STATUS_OK) {
        ALOGE("Update src surface def failed\n");
        unmapGPUAddr((unsigned long)srcMappedGpuAddr);
        return -ret;
    }

    dstMappedGpuAddr = (uint8_t *)getMappedGPUAddr(dstFd, dstData, mDstSize);
    if (!dstMappedGpuAddr) {
        unmapGPUAddr((unsigned long)srcMappedGpuAddr);
        return -1;
    }

    if (isYUVSurface(mDstFormat)) {
        ret = updateYUVSurfaceDef(dstMappedGpuAddr, dstBase, dstData, false);
    } else {
        ret = updateRGBSurfaceDef(dstMappedGpuAddr, dstData, false);
    }

    if (ret != C2D_STATUS_OK) {
        ALOGE("Update dst surface def failed\n");
        unmapGPUAddr((unsigned long)srcMappedGpuAddr);
        unmapGPUAddr((unsigned long)dstMappedGpuAddr);
        return -ret;
    }

    mBlit.surface_id = mSrcSurface;
    ret = mC2DDraw(mDstSurface, C2D_TARGET_ROTATE_0, 0, 0, 0, &mBlit, 1);
    mC2DFinish(mDstSurface);

    bool unmappedSrcSuccess;
    unmappedSrcSuccess = unmapGPUAddr((unsigned long)srcMappedGpuAddr);

    bool unmappedDstSuccess;
    unmappedDstSuccess = unmapGPUAddr((unsigned long)dstMappedGpuAddr);

    if (ret != C2D_STATUS_OK) {
        ALOGE("C2D Draw failed\n");
        return -ret; //c2d err values are positive
    } else {
        if (!unmappedSrcSuccess || !unmappedDstSuccess) {
            ALOGE("unmapping GPU address failed\n");
            return -1;
        }
        return ret;
    }
}

bool C2DColorConverter::isYUVSurface(ColorConvertFormat format)
{
    switch (format) {
        case YCbCr420Tile:
        case YCbCr420SP:
        case YCbCr420P:
        case YCrCb420P:
        case NV12_2K:
        case NV12_128m:
            return true;
        case RGB565:
        case RGBA8888:
        default:
            return false;
    }
}

void* C2DColorConverter::getDummySurfaceDef(ColorConvertFormat format, size_t width, size_t height, bool isSource)
{
    if (isYUVSurface(format)) {
        C2D_YUV_SURFACE_DEF * surfaceDef = (C2D_YUV_SURFACE_DEF *)malloc(sizeof(C2D_YUV_SURFACE_DEF));
        memset(surfaceDef, 0x0, sizeof(C2D_YUV_SURFACE_DEF));
        surfaceDef->format = getC2DFormat(format);
        surfaceDef->width = width;
        surfaceDef->height = height;
        surfaceDef->plane0 = (void *)0xaaaaaaaa;
        surfaceDef->phys0 = (void *)0xaaaaaaaa;
        surfaceDef->stride0 = calcStride(format, width);
        surfaceDef->plane1 = (void *)0xaaaaaaaa;
        surfaceDef->phys1 = (void *)0xaaaaaaaa;
        surfaceDef->stride1 = calcStride(format, width);

        if (format == YCbCr420P ||
            format == YCrCb420P) {
          printf("half stride for Cb Cr planes \n");
          surfaceDef->stride1 = calcStride(format, width) / 2;
          surfaceDef->phys2 = (void *)0xaaaaaaaa;
          surfaceDef->stride2 = calcStride(format, width) / 2;
        }
        mC2DCreateSurface(isSource ? &mSrcSurface : &mDstSurface, isSource ? C2D_SOURCE : C2D_TARGET,
                        (C2D_SURFACE_TYPE)(C2D_SURFACE_YUV_HOST | C2D_SURFACE_WITH_PHYS | C2D_SURFACE_WITH_PHYS_DUMMY),
                        &(*surfaceDef));
        return ((void *)surfaceDef);
    } else {
        C2D_RGB_SURFACE_DEF * surfaceDef = (C2D_RGB_SURFACE_DEF *)malloc(sizeof(C2D_RGB_SURFACE_DEF));
        memset(surfaceDef, 0x0, sizeof(C2D_RGB_SURFACE_DEF));
        surfaceDef->format = getC2DFormat(format);
        surfaceDef->width = width;
        surfaceDef->height = height;
        surfaceDef->buffer = (void *)0xaaaaaaaa;
        surfaceDef->phys = (void *)0xaaaaaaaa;
        surfaceDef->stride = calcStride(format, width);
        mC2DCreateSurface(isSource ? &mSrcSurface : &mDstSurface, isSource ? C2D_SOURCE : C2D_TARGET,
                        (C2D_SURFACE_TYPE)(C2D_SURFACE_RGB_HOST | C2D_SURFACE_WITH_PHYS | C2D_SURFACE_WITH_PHYS_DUMMY),
                        &(*surfaceDef));
        return ((void *)surfaceDef);
    }
}

C2D_STATUS C2DColorConverter::updateYUVSurfaceDef(uint8_t *gpuAddr, void *base, void *data, bool isSource)
{
    if (isSource) {
        C2D_YUV_SURFACE_DEF * srcSurfaceDef = (C2D_YUV_SURFACE_DEF *)mSrcSurfaceDef;
        srcSurfaceDef->plane0 = data;
        srcSurfaceDef->phys0  = gpuAddr + ((uint8_t *)data - (uint8_t *)base);
        srcSurfaceDef->plane1 = (uint8_t *)data + mSrcYSize;
        srcSurfaceDef->phys1  = (uint8_t *)srcSurfaceDef->phys0 + mSrcYSize;
        srcSurfaceDef->plane2 = (uint8_t *)srcSurfaceDef->plane1 + mSrcYSize/4;
        srcSurfaceDef->phys2  = (uint8_t *)srcSurfaceDef->phys1 + mSrcYSize/4;

        return mC2DUpdateSurface(mSrcSurface, C2D_SOURCE,
                        (C2D_SURFACE_TYPE)(C2D_SURFACE_YUV_HOST | C2D_SURFACE_WITH_PHYS),
                        &(*srcSurfaceDef));
    } else {
        C2D_YUV_SURFACE_DEF * dstSurfaceDef = (C2D_YUV_SURFACE_DEF *)mDstSurfaceDef;
        dstSurfaceDef->plane0 = data;
        dstSurfaceDef->phys0  = gpuAddr + ((uint8_t *)data - (uint8_t *)base);
        dstSurfaceDef->plane1 = (uint8_t *)data + mDstYSize;
        dstSurfaceDef->phys1  = (uint8_t *)dstSurfaceDef->phys0 + mDstYSize;
        dstSurfaceDef->plane2 = (uint8_t *)dstSurfaceDef->plane1 + mDstYSize/4;
        dstSurfaceDef->phys2  = (uint8_t *)dstSurfaceDef->phys1 + mDstYSize/4;

        return mC2DUpdateSurface(mDstSurface, C2D_TARGET,
                        (C2D_SURFACE_TYPE)(C2D_SURFACE_YUV_HOST | C2D_SURFACE_WITH_PHYS),
                        &(*dstSurfaceDef));
    }
}

C2D_STATUS C2DColorConverter::updateRGBSurfaceDef(uint8_t *gpuAddr, void * data, bool isSource)
{
    if (isSource) {
        C2D_RGB_SURFACE_DEF * srcSurfaceDef = (C2D_RGB_SURFACE_DEF *)mSrcSurfaceDef;
        srcSurfaceDef->buffer = data;
        srcSurfaceDef->phys = gpuAddr;
        return  mC2DUpdateSurface(mSrcSurface, C2D_SOURCE,
                        (C2D_SURFACE_TYPE)(C2D_SURFACE_RGB_HOST | C2D_SURFACE_WITH_PHYS),
                        &(*srcSurfaceDef));
    } else {
        C2D_RGB_SURFACE_DEF * dstSurfaceDef = (C2D_RGB_SURFACE_DEF *)mDstSurfaceDef;
        dstSurfaceDef->buffer = data;
        ALOGV("dstSurfaceDef->buffer = %p\n", data);
        dstSurfaceDef->phys = gpuAddr;
        return mC2DUpdateSurface(mDstSurface, C2D_TARGET,
                        (C2D_SURFACE_TYPE)(C2D_SURFACE_RGB_HOST | C2D_SURFACE_WITH_PHYS),
                        &(*dstSurfaceDef));
    }
}

uint32_t C2DColorConverter::getC2DFormat(ColorConvertFormat format)
{
    switch (format) {
        case RGB565:
            return C2D_COLOR_FORMAT_565_RGB;
        case RGBA8888:
            return C2D_COLOR_FORMAT_8888_RGBA | C2D_FORMAT_SWAP_ENDIANNESS | C2D_FORMAT_PREMULTIPLIED;
        case YCbCr420Tile:
            return (C2D_COLOR_FORMAT_420_NV12 | C2D_FORMAT_MACROTILED);
        case YCbCr420SP:
        case NV12_2K:
        case NV12_128m:
            return C2D_COLOR_FORMAT_420_NV12;
        case YCbCr420P:
            return C2D_COLOR_FORMAT_420_I420;
        case YCrCb420P:
            return C2D_COLOR_FORMAT_420_YV12;
        default:
            ALOGE("Format not supported , %d\n", format);
            return -1;
    }
}

size_t C2DColorConverter::calcStride(ColorConvertFormat format, size_t width)
{
    switch (format) {
        case RGB565:
            return ALIGN(width, ALIGN32) * 2; // RGB565 has width as twice
        case RGBA8888:
	if (mSrcStride)
		return mSrcStride * 4;
	else
		return ALIGN(width, ALIGN32) * 4;
        case YCbCr420Tile:
            return ALIGN(width, ALIGN128);
        case YCbCr420SP:
            return ALIGN(width, ALIGN16);
        case NV12_2K:
            return ALIGN(width, ALIGN16);
        case NV12_128m:
            return ALIGN(width, ALIGN128);
        case YCbCr420P:
            return width;
        case YCrCb420P:
            return ALIGN(width, ALIGN16);
        default:
            return 0;
    }
}

size_t C2DColorConverter::calcYSize(ColorConvertFormat format, size_t width, size_t height)
{
    switch (format) {
        case YCbCr420SP:
            return (ALIGN(width, ALIGN16) * height);
        case YCbCr420P:
            return width * height;
        case YCrCb420P:
            return ALIGN(width, ALIGN16) * height;
        case YCbCr420Tile:
            return ALIGN(ALIGN(width, ALIGN128) * ALIGN(height, ALIGN32), ALIGN8K);
        case NV12_2K: {
            size_t alignedw = ALIGN(width, ALIGN16);
            size_t lumaSize = ALIGN(alignedw * height, ALIGN2K);
            return lumaSize;
        }
        case NV12_128m:
            return ALIGN(width, ALIGN128) * ALIGN(height, ALIGN32);
        default:
            return 0;
    }
}

size_t C2DColorConverter::calcSize(ColorConvertFormat format, size_t width, size_t height)
{
    int32_t alignedw = 0;
    int32_t alignedh = 0;
    int32_t size = 0;

    switch (format) {
        case RGB565:
            size = ALIGN(width, ALIGN32) * ALIGN(height, ALIGN32) * 2;
            size = ALIGN(size, ALIGN4K);
            break;
        case RGBA8888:
            if (mSrcStride)
              size = mSrcStride *  ALIGN(height, ALIGN32) * 4;
            else
              size = ALIGN(width, ALIGN32) * ALIGN(height, ALIGN32) * 4;
            size = ALIGN(size, ALIGN4K);
            break;
        case YCbCr420SP:
            alignedw = ALIGN(width, ALIGN16);
            size = ALIGN((alignedw * height) + (ALIGN(width/2, ALIGN32) * (height/2) * 2), ALIGN4K);
            break;
        case YCbCr420P:
            size = ALIGN((width * height * 3 / 2), ALIGN4K);
            break;
        case YCrCb420P:
            alignedw = ALIGN(width, ALIGN16);
            size = ALIGN((alignedw * height) + (ALIGN(width/2, ALIGN16) * (height/2) * 2), ALIGN4K);
            break;
        case YCbCr420Tile:
            alignedw = ALIGN(width, ALIGN128);
            alignedh = ALIGN(height, ALIGN32);
            size = ALIGN(alignedw * alignedh, ALIGN8K) + ALIGN(alignedw * ALIGN(height/2, ALIGN32), ALIGN8K);
            break;
        case NV12_2K: {
            alignedw = ALIGN(width, ALIGN16);
            size_t lumaSize = ALIGN(alignedw * height, ALIGN2K);
            size_t chromaSize = ALIGN((alignedw * height)/2, ALIGN2K);
            size = ALIGN(lumaSize + chromaSize, ALIGN4K);
            ALOGV("NV12_2k, width = %d, height = %d, size = %d", width, height, size);
            }
            break;
        case NV12_128m:
            alignedw = ALIGN(width, ALIGN128);
            alignedh = ALIGN(height, ALIGN32);
            size = ALIGN(alignedw * alignedh + (alignedw * ALIGN(height/2, ALIGN16)), ALIGN4K);
            break;
        default:
            break;
    }
    return size;
}
/*
 * Tells GPU to map given buffer and returns a physical address of mapped buffer
 */
void * C2DColorConverter::getMappedGPUAddr(int bufFD, void *bufPtr, size_t bufLen)
{
    C2D_STATUS status;
    void *gpuaddr = NULL;

    status = mC2DMapAddr(bufFD, bufPtr, bufLen, 0, KGSL_USER_MEM_TYPE_ION,
            &gpuaddr);
    if (status != C2D_STATUS_OK) {
        ALOGE("c2dMapAddr failed: status %d fd %d ptr %p len %d flags %d\n",
                status, bufFD, bufPtr, bufLen, KGSL_USER_MEM_TYPE_ION);
        return NULL;
    }
    ALOGV("c2d mapping created: gpuaddr %p fd %d ptr %p len %d\n",
            gpuaddr, bufFD, bufPtr, bufLen);

    return gpuaddr;
}

bool C2DColorConverter::unmapGPUAddr(unsigned long gAddr)
{

    C2D_STATUS status = mC2DUnMapAddr((void*)gAddr);

    if (status != C2D_STATUS_OK)
        ALOGE("c2dUnMapAddr failed: status %d gpuaddr %08lx\n", status, gAddr);

    return (status == C2D_STATUS_OK);
}

int32_t C2DColorConverter::getBuffReq(int32_t port, C2DBuffReq *req) {
    if (!req) return -1;

    if (port != C2D_INPUT && port != C2D_OUTPUT) return -1;

    memset(req, 0, sizeof(C2DBuffReq));
    if (port == C2D_INPUT) {
        req->width = mSrcWidth;
        req->height = mSrcHeight;
        req->stride = calcStride(mSrcFormat, mSrcWidth);
        req->sliceHeight = mSrcHeight;
        req->lumaAlign = calcLumaAlign(mSrcFormat);
        req->sizeAlign = calcSizeAlign(mSrcFormat);
        req->size = calcSize(mSrcFormat, mSrcWidth, mSrcHeight);
        req->bpp = calcBytesPerPixel(mSrcFormat);
        ALOGV("input req->size = %d\n", req->size);
    } else if (port == C2D_OUTPUT) {
        req->width = mDstWidth;
        req->height = mDstHeight;
        req->stride = calcStride(mDstFormat, mDstWidth);
        req->sliceHeight = mDstHeight;
        req->lumaAlign = calcLumaAlign(mDstFormat);
        req->sizeAlign = calcSizeAlign(mDstFormat);
        req->size = calcSize(mDstFormat, mDstWidth, mDstHeight);
        req->bpp = calcBytesPerPixel(mDstFormat);
        ALOGV("output req->size = %d\n", req->size);
    }
    return 0;
}

size_t C2DColorConverter::calcLumaAlign(ColorConvertFormat format) {
    if (!isYUVSurface(format)) return 1; //no requirement

    switch (format) {
        case NV12_2K:
          return ALIGN2K;
        case NV12_128m:
        case YCbCr420SP: //OR NV12
        case YCbCr420P:
          return 1;
        default:
          ALOGE("unknown format passed for luma alignment number");
          return 1;
    }
}

size_t C2DColorConverter::calcSizeAlign(ColorConvertFormat format) {
    if (!isYUVSurface(format)) return 1; //no requirement

    switch (format) {
        case YCbCr420SP: //OR NV12
        case YCbCr420P:
        case NV12_2K:
        case NV12_128m:
          return ALIGN4K;
        default:
          ALOGE("unknown format passed for size alignment number");
          return 1;
    }
}

C2DBytesPerPixel C2DColorConverter::calcBytesPerPixel(ColorConvertFormat format) {
    C2DBytesPerPixel bpp;
    bpp.numerator = 0;
    bpp.denominator = 1;

    switch (format) {
        case RGB565:
            bpp.numerator = 2;
            break;
        case RGBA8888:
            bpp.numerator = 4;
            break;
        case YCbCr420SP:
        case YCbCr420P:
        case YCrCb420P:
        case YCbCr420Tile:
        case NV12_2K:
        case NV12_128m:
            bpp.numerator = 3;
            bpp.denominator = 2;
            break;
        default:
            break;
    }
    return bpp;
}

int32_t C2DColorConverter::dumpOutput(char * filename, char mode) {
    int fd;
    size_t stride, sliceHeight;
    if (!filename) return -1;

    int flags = O_RDWR | O_CREAT;
    if (mode == 'a') {
      flags |= O_APPEND;
    }

    if ((fd = open(filename, flags)) < 0) {
        ALOGE("open dump file failed w/ errno %s", strerror(errno));
        return -1;
    }

    int ret = 0;
    if (isYUVSurface(mDstFormat)) {
      C2D_YUV_SURFACE_DEF * dstSurfaceDef = (C2D_YUV_SURFACE_DEF *)mDstSurfaceDef;
      uint8_t * base = (uint8_t *)dstSurfaceDef->plane0;
      stride = dstSurfaceDef->stride0;
      sliceHeight = dstSurfaceDef->height;
      /* dump luma */
      for (size_t i = 0; i < sliceHeight; i++) {
        ret = write(fd, base, mDstWidth); //will work only for the 420 ones
        if (ret < 0) goto cleanup;
        base += stride;
      }

      if (mDstFormat == YCbCr420P ||
          mDstFormat == YCrCb420P) {
          printf("Dump Cb and Cr separately for Planar\n");
          //dump Cb/Cr
          base = (uint8_t *)dstSurfaceDef->plane1;
          stride = dstSurfaceDef->stride1;
          for (size_t i = 0; i < sliceHeight/2;i++) { //will work only for the 420 ones
            ret = write(fd, base, mDstWidth/2);
            if (ret < 0) goto cleanup;
            base += stride;
          }

          //dump Cr/Cb
          base = (uint8_t *)dstSurfaceDef->plane2;
          stride = dstSurfaceDef->stride2;

          for (size_t i = 0; i < sliceHeight/2;i++) { //will work only for the 420 ones
            ret = write(fd, base, mDstWidth/2);
            if (ret < 0) goto cleanup;
            base += stride;
          }

      } else {
          /* dump chroma */
          base = (uint8_t *)dstSurfaceDef->plane1;
          stride = dstSurfaceDef->stride1;
          for (size_t i = 0; i < sliceHeight/2;i++) { //will work only for the 420 ones
            ret = write(fd, base, mDstWidth);
            if (ret < 0) goto cleanup;
            base += stride;
          }
      }
    } else {
      C2D_RGB_SURFACE_DEF * dstSurfaceDef = (C2D_RGB_SURFACE_DEF *)mDstSurfaceDef;
      uint8_t * base = (uint8_t *)dstSurfaceDef->buffer;
      stride = dstSurfaceDef->stride;
      sliceHeight = dstSurfaceDef->height;

      printf("rgb surface base is %p", base);
      printf("rgb surface dumpsslice height is %lu\n", (unsigned long)sliceHeight);
      printf("rgb surface dump stride is %lu\n", (unsigned long)stride);

      int bpp = 1; //bytes per pixel
      if (mDstFormat == RGB565) {
        bpp = 2;
      } else if (mDstFormat == RGBA8888) {
        bpp = 4;
      }

      int count = 0;
      for (size_t i = 0; i < sliceHeight; i++) {
        ret = write(fd, base, mDstWidth*bpp);
        if (ret < 0) {
          printf("write failed, count = %d\n", count);
          goto cleanup;
        }
        base += stride;
        count += stride;
      }
    }
 cleanup:
    if (ret < 0) {
      ALOGE("file write failed w/ errno %s", strerror(errno));
    }
    close(fd);
    return ret < 0 ? ret : 0;
}

extern "C" C2DColorConverterBase* createC2DColorConverter(size_t srcWidth, size_t srcHeight, size_t dstWidth, size_t dstHeight, ColorConvertFormat srcFormat, ColorConvertFormat dstFormat, int32_t flags, size_t srcStride)
{
    return new C2DColorConverter(srcWidth, srcHeight, dstWidth, dstHeight, srcFormat, dstFormat, flags, srcStride);
}

extern "C" void destroyC2DColorConverter(C2DColorConverterBase* C2DCC)
{
    delete C2DCC;
}

}