/*
 * This file is part of MPlayer.
 *
 * MPlayer is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * MPlayer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with MPlayer; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "config.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "talloc.h"

#include "video/img_format.h"
#include "video/mp_image.h"
#include "video/sws_utils.h"

#include "video/memcpy_pic.h"
#include "libavutil/mem.h"
#include "libavutil/common.h"

void mp_image_alloc_planes(mp_image_t *mpi) {
  if (mpi->imgfmt == IMGFMT_BGRA) {
    mpi->stride[0]=FFALIGN(mpi->width*4,SWS_MIN_BYTE_ALIGN);
    mpi->planes[0]=av_malloc(mpi->stride[0]*mpi->height);
    mpi->flags|=MP_IMGFLAG_ALLOCATED;
    return;
  }
  if (mpi->imgfmt == IMGFMT_444P16 || mpi->imgfmt == IMGFMT_444P) {
    int bp = mpi->imgfmt == IMGFMT_444P16 ? 2 : 1;
    mpi->stride[0]=FFALIGN(mpi->width*bp,SWS_MIN_BYTE_ALIGN);
    mpi->stride[1]=mpi->stride[2]=mpi->stride[0];
    int imgsize = mpi->stride[0] * mpi->height;
    mpi->planes[0]=av_malloc(imgsize*3);
    mpi->planes[1]=mpi->planes[0]+imgsize;
    mpi->planes[2]=mpi->planes[1]+imgsize;
    mpi->flags|=MP_IMGFLAG_ALLOCATED;
    return;
  }
  // IF09 - allocate space for 4. plane delta info - unused
  if (mpi->imgfmt == IMGFMT_IF09) {
    mpi->planes[0]=av_malloc(mpi->bpp*mpi->width*(mpi->height+2)/8+
                            mpi->chroma_width*mpi->chroma_height);
  } else
    mpi->planes[0]=av_malloc(mpi->bpp*mpi->width*(mpi->height+2)/8);
  if (!mpi->planes[0])
    abort(); //out of memory
  if (mpi->flags&MP_IMGFLAG_PLANAR) {
    // FIXME this code only supports same bpp for all planes, and bpp divisible
    // by 8. Currently the case for all planar formats.
    int bpp = MP_IMAGE_PLANAR_BITS_PER_PIXEL_ON_PLANE(mpi, 0) / 8;
    // YV12/I420/YVU9/IF09. feel free to add other planar formats here...
    mpi->stride[0]=mpi->stride[3]=bpp*mpi->width;
    if(mpi->num_planes > 2){
      mpi->stride[1]=mpi->stride[2]=bpp*mpi->chroma_width;
      if(mpi->flags&MP_IMGFLAG_SWAPPED){
        // I420/IYUV  (Y,U,V)
        mpi->planes[1]=mpi->planes[0]+mpi->stride[0]*mpi->height;
        mpi->planes[2]=mpi->planes[1]+mpi->stride[1]*mpi->chroma_height;
        if (mpi->num_planes > 3)
            mpi->planes[3]=mpi->planes[2]+mpi->stride[2]*mpi->chroma_height;
      } else {
        // YV12,YVU9,IF09  (Y,V,U)
        mpi->planes[2]=mpi->planes[0]+mpi->stride[0]*mpi->height;
        mpi->planes[1]=mpi->planes[2]+mpi->stride[1]*mpi->chroma_height;
        if (mpi->num_planes > 3)
            mpi->planes[3]=mpi->planes[1]+mpi->stride[1]*mpi->chroma_height;
      }
    } else {
      // NV12/NV21
      mpi->stride[1]=mpi->chroma_width;
      mpi->planes[1]=mpi->planes[0]+mpi->stride[0]*mpi->height;
    }
  } else {
    mpi->stride[0]=mpi->width*mpi->bpp/8;
    if (mpi->flags & MP_IMGFLAG_RGB_PALETTE)
      mpi->planes[1] = av_malloc(1024);
  }
  mpi->flags|=MP_IMGFLAG_ALLOCATED;
}

mp_image_t* alloc_mpi(int w, int h, unsigned long int fmt) {
  mp_image_t* mpi = new_mp_image(w,h);

  mp_image_setfmt(mpi,fmt);
  mp_image_alloc_planes(mpi);

  return mpi;
}

void copy_mpi(mp_image_t *dmpi, mp_image_t *mpi) {
  if(mpi->flags&MP_IMGFLAG_PLANAR){
    memcpy_pic(dmpi->planes[0],mpi->planes[0], MP_IMAGE_BYTES_PER_ROW_ON_PLANE(mpi, 0), mpi->h,
	       dmpi->stride[0],mpi->stride[0]);
    memcpy_pic(dmpi->planes[1],mpi->planes[1], MP_IMAGE_BYTES_PER_ROW_ON_PLANE(mpi, 1), mpi->chroma_height,
	       dmpi->stride[1],mpi->stride[1]);
    memcpy_pic(dmpi->planes[2], mpi->planes[2], MP_IMAGE_BYTES_PER_ROW_ON_PLANE(mpi, 2), mpi->chroma_height,
	       dmpi->stride[2],mpi->stride[2]);
  } else {
    memcpy_pic(dmpi->planes[0],mpi->planes[0],
	       MP_IMAGE_BYTES_PER_ROW_ON_PLANE(mpi, 0), mpi->h,
	       dmpi->stride[0],mpi->stride[0]);
  }
}

void mp_image_setfmt(mp_image_t* mpi,unsigned int out_fmt){
    mpi->flags&=~(MP_IMGFLAG_PLANAR|MP_IMGFLAG_YUV|MP_IMGFLAG_SWAPPED);
    mpi->imgfmt=out_fmt;
    // compressed formats
    if(IMGFMT_IS_HWACCEL(out_fmt)){
	mpi->bpp=0;
	return;
    }
    mpi->num_planes=1;
    if (IMGFMT_IS_RGB(out_fmt)) {
	if (IMGFMT_RGB_DEPTH(out_fmt) < 8 && !(out_fmt&128))
	    mpi->bpp = IMGFMT_RGB_DEPTH(out_fmt);
	else
	    mpi->bpp=(IMGFMT_RGB_DEPTH(out_fmt)+7)&(~7);
	return;
    }
    if (IMGFMT_IS_BGR(out_fmt)) {
	if (IMGFMT_BGR_DEPTH(out_fmt) < 8 && !(out_fmt&128))
	    mpi->bpp = IMGFMT_BGR_DEPTH(out_fmt);
	else
	    mpi->bpp=(IMGFMT_BGR_DEPTH(out_fmt)+7)&(~7);
	mpi->flags|=MP_IMGFLAG_SWAPPED;
	return;
    }
    switch (out_fmt) {
    case IMGFMT_BGR0:
        mpi->bpp = 32;
        return;
    }
    mpi->num_planes=3;
    if (out_fmt == IMGFMT_GBRP) {
        mpi->bpp=24;
        mpi->flags|=MP_IMGFLAG_PLANAR;
        return;
    }
    mpi->flags|=MP_IMGFLAG_YUV;
    if (mp_get_chroma_shift(out_fmt, NULL, NULL, NULL)) {
        mpi->flags|=MP_IMGFLAG_PLANAR;
        mpi->bpp = mp_get_chroma_shift(out_fmt, &mpi->chroma_x_shift, &mpi->chroma_y_shift, NULL);
        mpi->chroma_width  = mpi->width  >> mpi->chroma_x_shift;
        mpi->chroma_height = mpi->height >> mpi->chroma_y_shift;
    }
    switch(out_fmt){
    case IMGFMT_I420:
    case IMGFMT_IYUV:
	mpi->flags|=MP_IMGFLAG_SWAPPED;
    case IMGFMT_YV12:
	return;
    case IMGFMT_420A:
    case IMGFMT_IF09:
	mpi->num_planes=4;
    case IMGFMT_YVU9:
    case IMGFMT_444P:
    case IMGFMT_422P:
    case IMGFMT_411P:
    case IMGFMT_440P:
    case IMGFMT_444P16_LE:
    case IMGFMT_444P16_BE:
    case IMGFMT_444P10_LE:
    case IMGFMT_444P10_BE:
    case IMGFMT_444P9_LE:
    case IMGFMT_444P9_BE:
    case IMGFMT_422P16_LE:
    case IMGFMT_422P16_BE:
    case IMGFMT_422P10_LE:
    case IMGFMT_422P10_BE:
    case IMGFMT_422P9_LE:
    case IMGFMT_422P9_BE:
    case IMGFMT_420P16_LE:
    case IMGFMT_420P16_BE:
    case IMGFMT_420P10_LE:
    case IMGFMT_420P10_BE:
    case IMGFMT_420P9_LE:
    case IMGFMT_420P9_BE:
	return;
    case IMGFMT_Y800:
    case IMGFMT_Y8:
    case IMGFMT_Y16LE:
    case IMGFMT_Y16BE:
	/* they're planar ones, but for easier handling use them as packed */
	mpi->flags&=~MP_IMGFLAG_PLANAR;
	mpi->num_planes=1;
	return;
    case IMGFMT_UYVY:
	mpi->flags|=MP_IMGFLAG_SWAPPED;
    case IMGFMT_YUY2:
        mpi->chroma_x_shift = 1;
        mpi->chroma_y_shift = 1;
        mpi->chroma_width=(mpi->width>>1);
        mpi->chroma_height=(mpi->height>>1);
	mpi->bpp=16;
	mpi->num_planes=1;
	return;
    case IMGFMT_NV12:
	mpi->flags|=MP_IMGFLAG_SWAPPED;
    case IMGFMT_NV21:
	mpi->flags|=MP_IMGFLAG_PLANAR;
	mpi->bpp=12;
	mpi->num_planes=2;
	mpi->chroma_width=(mpi->width>>0);
	mpi->chroma_height=(mpi->height>>1);
	mpi->chroma_x_shift=0;
	mpi->chroma_y_shift=1;
	return;
    }
    mp_msg(MSGT_DECVIDEO,MSGL_WARN,"mp_image: unknown out_fmt: 0x%X\n",out_fmt);
    mpi->bpp=0;
}

static int mp_image_destructor(void *ptr)
{
    mp_image_t *mpi = ptr;

    if(mpi->flags&MP_IMGFLAG_ALLOCATED){
        /* because we allocate the whole image at once */
        av_free(mpi->planes[0]);
        if (mpi->flags & MP_IMGFLAG_RGB_PALETTE)
            av_free(mpi->planes[1]);
    }

    return 0;
}

mp_image_t* new_mp_image(int w,int h){
    mp_image_t* mpi = talloc_zero(NULL, mp_image_t);
    talloc_set_destructor(mpi, mp_image_destructor);
    mpi->width=mpi->w=w;
    mpi->height=mpi->h=h;
    return mpi;
}

void free_mp_image(mp_image_t* mpi){
    talloc_free(mpi);
}

enum mp_csp mp_image_csp(struct mp_image *img)
{
    if (img->colorspace != MP_CSP_AUTO)
        return img->colorspace;
    return (img->flags & MP_IMGFLAG_YUV) ? MP_CSP_BT_601 : MP_CSP_RGB;
}

enum mp_csp_levels mp_image_levels(struct mp_image *img)
{
    if (img->levels != MP_CSP_LEVELS_AUTO)
        return img->levels;
    return (img->flags & MP_IMGFLAG_YUV) ? MP_CSP_LEVELS_TV : MP_CSP_LEVELS_PC;
}

void mp_image_set_colorspace_details(struct mp_image *image,
                                     struct mp_csp_details *csp)
{
    if (image->flags & MP_IMGFLAG_YUV) {
        image->colorspace = csp->format;
        if (image->colorspace == MP_CSP_AUTO)
            image->colorspace = MP_CSP_BT_601;
        image->levels = csp->levels_in;
        if (image->levels == MP_CSP_LEVELS_AUTO)
            image->levels = MP_CSP_LEVELS_TV;
    } else {
        image->colorspace = MP_CSP_RGB;
        image->levels = MP_CSP_LEVELS_PC;
    }
}