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/*

 * 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 

#include 

#include 

#include "config.h"

#include "mp_msg.h"

#include "img_format.h"

#include "mp_image.h"

#include "vf.h"

#include "libvo/fastmemcpy.h"

struct vf_priv_s {

    int state;

    long long in;

    long long out;

};

static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)

{

    mp_image_t *dmpi;

    int ret = 0;

    int flags = mpi->fields;

    int state = vf->priv->state;

    dmpi = ff_vf_get_image(vf->next, mpi->imgfmt,

                        MP_IMGTYPE_STATIC, MP_IMGFLAG_ACCEPT_STRIDE |

                        MP_IMGFLAG_PRESERVE, mpi->width, mpi->height);

    vf->priv->in++;

    if ((state == 0 &&

         !(flags & MP_IMGFIELD_TOP_FIRST)) ||

        (state == 1 &&

         flags & MP_IMGFIELD_TOP_FIRST)) {

        ff_mp_msg(MSGT_VFILTER, MSGL_WARN,

               "softpulldown: Unexpected field flags: state=%d top_field_first=%d repeat_first_field=%d\n",

               state,

               (flags & MP_IMGFIELD_TOP_FIRST) != 0,

               (flags & MP_IMGFIELD_REPEAT_FIRST) != 0);

        state ^= 1;

    }

    if (state == 0) {

        ret = ff_vf_next_put_image(vf, mpi, MP_NOPTS_VALUE);

        vf->priv->out++;

        if (flags & MP_IMGFIELD_REPEAT_FIRST) {

            my_memcpy_pic(dmpi->planes[0],

                       mpi->planes[0], mpi->w, mpi->h/2,

                       dmpi->stride[0]*2, mpi->stride[0]*2);

            if (mpi->flags & MP_IMGFLAG_PLANAR) {

                my_memcpy_pic(dmpi->planes[1],

                              mpi->planes[1],

                              mpi->chroma_width,

                              mpi->chroma_height/2,

                              dmpi->stride[1]*2,

                              mpi->stride[1]*2);

                my_memcpy_pic(dmpi->planes[2],

                              mpi->planes[2],

                              mpi->chroma_width,

                              mpi->chroma_height/2,

                              dmpi->stride[2]*2,

                              mpi->stride[2]*2);

            }

            state=1;

        }

    } else {

        my_memcpy_pic(dmpi->planes[0]+dmpi->stride[0],

                      mpi->planes[0]+mpi->stride[0], mpi->w, mpi->h/2,

                      dmpi->stride[0]*2, mpi->stride[0]*2);

        if (mpi->flags & MP_IMGFLAG_PLANAR) {

            my_memcpy_pic(dmpi->planes[1]+dmpi->stride[1],

                          mpi->planes[1]+mpi->stride[1],

                          mpi->chroma_width, mpi->chroma_height/2,

                          dmpi->stride[1]*2, mpi->stride[1]*2);

            my_memcpy_pic(dmpi->planes[2]+dmpi->stride[2],

                          mpi->planes[2]+mpi->stride[2],

                          mpi->chroma_width, mpi->chroma_height/2,

                          dmpi->stride[2]*2, mpi->stride[2]*2);

        }

        ret = ff_vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);

        vf->priv->out++;

        if (flags & MP_IMGFIELD_REPEAT_FIRST) {

            ret |= ff_vf_next_put_image(vf, mpi, MP_NOPTS_VALUE);

            vf->priv->out++;

            state=0;

        } else {

            my_memcpy_pic(dmpi->planes[0],

                          mpi->planes[0], mpi->w, mpi->h/2,

                          dmpi->stride[0]*2, mpi->stride[0]*2);

            if (mpi->flags & MP_IMGFLAG_PLANAR) {

                my_memcpy_pic(dmpi->planes[1],

                              mpi->planes[1],

                              mpi->chroma_width,

                              mpi->chroma_height/2,

                              dmpi->stride[1]*2,

                              mpi->stride[1]*2);

                my_memcpy_pic(dmpi->planes[2],

                              mpi->planes[2],

                              mpi->chroma_width,

                              mpi->chroma_height/2,

                              dmpi->stride[2]*2,

                              mpi->stride[2]*2);

            }

        }

    }

    vf->priv->state = state;

    return ret;

}

static int config(struct vf_instance *vf,

    int width, int height, int d_width, int d_height,

    unsigned int flags, unsigned int outfmt)

{

    return ff_vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);

}

static void uninit(struct vf_instance *vf)

{

    ff_mp_msg(MSGT_VFILTER, MSGL_INFO, "softpulldown: %lld frames in, %lld frames out\n", vf->priv->in, vf->priv->out);

    free(vf->priv);

}

static int vf_open(vf_instance_t *vf, char *args)

{

    vf->config = config;

    vf->put_image = put_image;

    vf->uninit = uninit;

    vf->default_reqs = VFCAP_ACCEPT_STRIDE;

    vf->priv = calloc(1, sizeof(struct vf_priv_s));

    vf->priv->state = 0;

    return 1;

}

const vf_info_t ff_vf_info_softpulldown = {

    "mpeg2 soft 3:2 pulldown",

    "softpulldown",

    "Tobias Diedrich ",

    "",

    vf_open,

    NULL

};