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/*

 * Copyright (c) 2011 Michael Niedermayer

 *

 * This file is part of FFmpeg.

 *

 * FFmpeg 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.

 *

 * FFmpeg 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 FFmpeg; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 *

 * Parts of this file have been stolen from mplayer

 */

/**

 * @file

 */

#include "avfilter.h"

#include "video.h"

#include "formats.h"

#include "internal.h"

#include "libavutil/avassert.h"

#include "libavutil/pixdesc.h"

#include "libavutil/intreadwrite.h"

#include "libavutil/imgutils.h"

#include "libavutil/opt.h"

#include "libmpcodecs/vf.h"

#include "libmpcodecs/img_format.h"

#include "libmpcodecs/cpudetect.h"

#include "libmpcodecs/av_helpers.h"

#include "libmpcodecs/libvo/fastmemcpy.h"

#include "libswscale/swscale.h"

//FIXME maybe link the orig in

//XXX: identical pix_fmt must be following with each others

static const struct {

    int fmt;

    enum AVPixelFormat pix_fmt;

} conversion_map[] = {

    {IMGFMT_ARGB, AV_PIX_FMT_ARGB},

    {IMGFMT_BGRA, AV_PIX_FMT_BGRA},

    {IMGFMT_BGR24, AV_PIX_FMT_BGR24},

    {IMGFMT_BGR16BE, AV_PIX_FMT_RGB565BE},

    {IMGFMT_BGR16LE, AV_PIX_FMT_RGB565LE},

    {IMGFMT_BGR15BE, AV_PIX_FMT_RGB555BE},

    {IMGFMT_BGR15LE, AV_PIX_FMT_RGB555LE},

    {IMGFMT_BGR12BE, AV_PIX_FMT_RGB444BE},

    {IMGFMT_BGR12LE, AV_PIX_FMT_RGB444LE},

    {IMGFMT_BGR8,  AV_PIX_FMT_RGB8},

    {IMGFMT_BGR4,  AV_PIX_FMT_RGB4},

    {IMGFMT_BGR1,  AV_PIX_FMT_MONOBLACK},

    {IMGFMT_RGB1,  AV_PIX_FMT_MONOBLACK},

    {IMGFMT_RG4B,  AV_PIX_FMT_BGR4_BYTE},

    {IMGFMT_BG4B,  AV_PIX_FMT_RGB4_BYTE},

    {IMGFMT_RGB48LE, AV_PIX_FMT_RGB48LE},

    {IMGFMT_RGB48BE, AV_PIX_FMT_RGB48BE},

    {IMGFMT_ABGR, AV_PIX_FMT_ABGR},

    {IMGFMT_RGBA, AV_PIX_FMT_RGBA},

    {IMGFMT_RGB24, AV_PIX_FMT_RGB24},

    {IMGFMT_RGB16BE, AV_PIX_FMT_BGR565BE},

    {IMGFMT_RGB16LE, AV_PIX_FMT_BGR565LE},

    {IMGFMT_RGB15BE, AV_PIX_FMT_BGR555BE},

    {IMGFMT_RGB15LE, AV_PIX_FMT_BGR555LE},

    {IMGFMT_RGB12BE, AV_PIX_FMT_BGR444BE},

    {IMGFMT_RGB12LE, AV_PIX_FMT_BGR444LE},

    {IMGFMT_RGB8,  AV_PIX_FMT_BGR8},

    {IMGFMT_RGB4,  AV_PIX_FMT_BGR4},

    {IMGFMT_BGR8,  AV_PIX_FMT_PAL8},

    {IMGFMT_YUY2,  AV_PIX_FMT_YUYV422},

    {IMGFMT_UYVY,  AV_PIX_FMT_UYVY422},

    {IMGFMT_NV12,  AV_PIX_FMT_NV12},

    {IMGFMT_NV21,  AV_PIX_FMT_NV21},

    {IMGFMT_Y800,  AV_PIX_FMT_GRAY8},

    {IMGFMT_Y8,    AV_PIX_FMT_GRAY8},

    {IMGFMT_YVU9,  AV_PIX_FMT_YUV410P},

    {IMGFMT_IF09,  AV_PIX_FMT_YUV410P},

    {IMGFMT_YV12,  AV_PIX_FMT_YUV420P},

    {IMGFMT_I420,  AV_PIX_FMT_YUV420P},

    {IMGFMT_IYUV,  AV_PIX_FMT_YUV420P},

    {IMGFMT_411P,  AV_PIX_FMT_YUV411P},

    {IMGFMT_422P,  AV_PIX_FMT_YUV422P},

    {IMGFMT_444P,  AV_PIX_FMT_YUV444P},

    {IMGFMT_440P,  AV_PIX_FMT_YUV440P},

    {IMGFMT_420A,  AV_PIX_FMT_YUVA420P},

    {IMGFMT_420P16_LE,  AV_PIX_FMT_YUV420P16LE},

    {IMGFMT_420P16_BE,  AV_PIX_FMT_YUV420P16BE},

    {IMGFMT_422P16_LE,  AV_PIX_FMT_YUV422P16LE},

    {IMGFMT_422P16_BE,  AV_PIX_FMT_YUV422P16BE},

    {IMGFMT_444P16_LE,  AV_PIX_FMT_YUV444P16LE},

    {IMGFMT_444P16_BE,  AV_PIX_FMT_YUV444P16BE},

    // YUVJ are YUV formats that use the full Y range and not just

    // 16 - 235 (see colorspaces.txt).

    // Currently they are all treated the same way.

    {IMGFMT_YV12,  AV_PIX_FMT_YUVJ420P},

    {IMGFMT_422P,  AV_PIX_FMT_YUVJ422P},

    {IMGFMT_444P,  AV_PIX_FMT_YUVJ444P},

    {IMGFMT_440P,  AV_PIX_FMT_YUVJ440P},

    {IMGFMT_XVMC_MOCO_MPEG2, AV_PIX_FMT_XVMC_MPEG2_MC},

    {IMGFMT_XVMC_IDCT_MPEG2, AV_PIX_FMT_XVMC_MPEG2_IDCT},

    {IMGFMT_VDPAU_MPEG1,     AV_PIX_FMT_VDPAU_MPEG1},

    {IMGFMT_VDPAU_MPEG2,     AV_PIX_FMT_VDPAU_MPEG2},

    {IMGFMT_VDPAU_H264,      AV_PIX_FMT_VDPAU_H264},

    {IMGFMT_VDPAU_WMV3,      AV_PIX_FMT_VDPAU_WMV3},

    {IMGFMT_VDPAU_VC1,       AV_PIX_FMT_VDPAU_VC1},

    {IMGFMT_VDPAU_MPEG4,     AV_PIX_FMT_VDPAU_MPEG4},

    {0, AV_PIX_FMT_NONE}

};

extern const vf_info_t ff_vf_info_eq2;

extern const vf_info_t ff_vf_info_eq;

extern const vf_info_t ff_vf_info_fspp;

extern const vf_info_t ff_vf_info_ilpack;

extern const vf_info_t ff_vf_info_pp7;

extern const vf_info_t ff_vf_info_softpulldown;

extern const vf_info_t ff_vf_info_uspp;

static const vf_info_t* const filters[]={

    &ff_vf_info_eq2,

    &ff_vf_info_eq,

    &ff_vf_info_fspp,

    &ff_vf_info_ilpack,

    &ff_vf_info_pp7,

    &ff_vf_info_softpulldown,

    &ff_vf_info_uspp,

    NULL

};

/*

Unsupported filters

1bpp

ass

bmovl

crop

dvbscale

flip

expand

format

halfpack

lavc

lavcdeint

noformat

pp

scale

tfields

vo

yadif

zrmjpeg

*/

CpuCaps ff_gCpuCaps; //FIXME initialize this so optims work

enum AVPixelFormat ff_mp2ff_pix_fmt(int mp){

    int i;

    for(i=0; conversion_map[i].fmt && mp != conversion_map[i].fmt; i++)

        ;

    return mp == conversion_map[i].fmt ? conversion_map[i].pix_fmt : AV_PIX_FMT_NONE;

}

typedef struct {

    const AVClass *class;

    vf_instance_t vf;

    vf_instance_t next_vf;

    AVFilterContext *avfctx;

    int frame_returned;

    char *filter;

    enum AVPixelFormat in_pix_fmt;

} MPContext;

#define OFFSET(x) offsetof(MPContext, x)

#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

static const AVOption mp_options[] = {

    { "filter", "set MPlayer filter name and parameters", OFFSET(filter), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },

    { NULL }

};

AVFILTER_DEFINE_CLASS(mp);

void ff_mp_msg(int mod, int lev, const char *format, ... ){

    va_list va;

    va_start(va, format);

    //FIXME convert lev/mod

    av_vlog(NULL, AV_LOG_DEBUG, format, va);

    va_end(va);

}

int ff_mp_msg_test(int mod, int lev){

    return 123;

}

void ff_init_avcodec(void)

{

    //we maybe should init but its kinda 1. unneeded 2. a bit inpolite from here

}

//Exact copy of vf.c

void ff_vf_clone_mpi_attributes(mp_image_t* dst, mp_image_t* src){

    dst->pict_type= src->pict_type;

    dst->fields = src->fields;

    dst->qscale_type= src->qscale_type;

    if(dst->width == src->width && dst->height == src->height){

        dst->qstride= src->qstride;

        dst->qscale= src->qscale;

    }

}

//Exact copy of vf.c

void ff_vf_next_draw_slice(struct vf_instance *vf,unsigned char** src, int * stride,int w, int h, int x, int y){

    if (vf->next->draw_slice) {

        vf->next->draw_slice(vf->next,src,stride,w,h,x,y);

        return;

    }

    if (!vf->dmpi) {

        ff_mp_msg(MSGT_VFILTER,MSGL_ERR,"draw_slice: dmpi not stored by vf_%s\n", vf->info->name);

        return;

    }

    if (!(vf->dmpi->flags & MP_IMGFLAG_PLANAR)) {

        memcpy_pic(vf->dmpi->planes[0]+y*vf->dmpi->stride[0]+vf->dmpi->bpp/8*x,

            src[0], vf->dmpi->bpp/8*w, h, vf->dmpi->stride[0], stride[0]);

        return;

    }

    memcpy_pic(vf->dmpi->planes[0]+y*vf->dmpi->stride[0]+x, src[0],

        w, h, vf->dmpi->stride[0], stride[0]);

    memcpy_pic(vf->dmpi->planes[1]+(y>>vf->dmpi->chroma_y_shift)*vf->dmpi->stride[1]+(x>>vf->dmpi->chroma_x_shift),

        src[1], w>>vf->dmpi->chroma_x_shift, h>>vf->dmpi->chroma_y_shift, vf->dmpi->stride[1], stride[1]);

    memcpy_pic(vf->dmpi->planes[2]+(y>>vf->dmpi->chroma_y_shift)*vf->dmpi->stride[2]+(x>>vf->dmpi->chroma_x_shift),

        src[2], w>>vf->dmpi->chroma_x_shift, h>>vf->dmpi->chroma_y_shift, vf->dmpi->stride[2], stride[2]);

}

//Exact copy of vf.c

void ff_vf_mpi_clear(mp_image_t* mpi,int x0,int y0,int w,int h){

    int y;

    if(mpi->flags&MP_IMGFLAG_PLANAR){

        y0&=~1;h+=h&1;

        if(x0==0 && w==mpi->width){

            // full width clear:

            memset(mpi->planes[0]+mpi->stride[0]*y0,0,mpi->stride[0]*h);

            memset(mpi->planes[1]+mpi->stride[1]*(y0>>mpi->chroma_y_shift),128,mpi->stride[1]*(h>>mpi->chroma_y_shift));

            memset(mpi->planes[2]+mpi->stride[2]*(y0>>mpi->chroma_y_shift),128,mpi->stride[2]*(h>>mpi->chroma_y_shift));

        } else

        for(y=y0;y

            memset(mpi->planes[0]+x0+mpi->stride[0]*y,0,w);

            memset(mpi->planes[0]+x0+mpi->stride[0]*(y+1),0,w);

            memset(mpi->planes[1]+(x0>>mpi->chroma_x_shift)+mpi->stride[1]*(y>>mpi->chroma_y_shift),128,(w>>mpi->chroma_x_shift));

            memset(mpi->planes[2]+(x0>>mpi->chroma_x_shift)+mpi->stride[2]*(y>>mpi->chroma_y_shift),128,(w>>mpi->chroma_x_shift));

        }

        return;

    }

    // packed:

    for(y=y0;y

        unsigned char* dst=mpi->planes[0]+mpi->stride[0]*y+(mpi->bpp>>3)*x0;

        if(mpi->flags&MP_IMGFLAG_YUV){

            unsigned int* p=(unsigned int*) dst;

            int size=(mpi->bpp>>3)*w/4;

            int i;

#if HAVE_BIGENDIAN

#define CLEAR_PACKEDYUV_PATTERN 0x00800080

#define CLEAR_PACKEDYUV_PATTERN_SWAPPED 0x80008000

#else

#define CLEAR_PACKEDYUV_PATTERN 0x80008000

#define CLEAR_PACKEDYUV_PATTERN_SWAPPED 0x00800080

#endif

            if(mpi->flags&MP_IMGFLAG_SWAPPED){

                for(i=0;i

                for(;i

            } else {

                for(i=0;i

                for(;i

            }

        } else

            memset(dst,0,(mpi->bpp>>3)*w);

    }

}

int ff_vf_next_query_format(struct vf_instance *vf, unsigned int fmt){

    return 1;

}

//used by delogo

unsigned int ff_vf_match_csp(vf_instance_t** vfp,const unsigned int* list,unsigned int preferred){

    return preferred;

}

mp_image_t* ff_vf_get_image(vf_instance_t* vf, unsigned int outfmt, int mp_imgtype, int mp_imgflag, int w, int h){

    MPContext *m= (MPContext*)(((uint8_t*)vf) - offsetof(MPContext, next_vf));

  mp_image_t* mpi=NULL;

  int w2;

  int number = mp_imgtype >> 16;

  av_assert0(vf->next == NULL); // all existing filters call this just on next

  //vf_dint needs these as it calls ff_vf_get_image() before configuring the output

  if(vf->w==0 && w>0) vf->w=w;

  if(vf->h==0 && h>0) vf->h=h;

  av_assert0(w == -1 || w >= vf->w);

  av_assert0(h == -1 || h >= vf->h);

  av_assert0(vf->w > 0);

  av_assert0(vf->h > 0);

  av_log(m->avfctx, AV_LOG_DEBUG, "get_image: %d:%d, vf: %d:%d\n", w,h,vf->w,vf->h);

  if (w == -1) w = vf->w;

  if (h == -1) h = vf->h;

  w2=(mp_imgflag&MP_IMGFLAG_ACCEPT_ALIGNED_STRIDE)?((w+15)&(~15)):w;

  // Note: we should call libvo first to check if it supports direct rendering

  // and if not, then fallback to software buffers:

  switch(mp_imgtype & 0xff){

  case MP_IMGTYPE_EXPORT:

    if(!vf->imgctx.export_images[0]) vf->imgctx.export_images[0]=ff_new_mp_image(w2,h);

    mpi=vf->imgctx.export_images[0];

    break;

  case MP_IMGTYPE_STATIC:

    if(!vf->imgctx.static_images[0]) vf->imgctx.static_images[0]=ff_new_mp_image(w2,h);

    mpi=vf->imgctx.static_images[0];

    break;

  case MP_IMGTYPE_TEMP:

    if(!vf->imgctx.temp_images[0]) vf->imgctx.temp_images[0]=ff_new_mp_image(w2,h);

    mpi=vf->imgctx.temp_images[0];

    break;

  case MP_IMGTYPE_IPB:

    if(!(mp_imgflag&MP_IMGFLAG_READABLE)){ // B frame:

      if(!vf->imgctx.temp_images[0]) vf->imgctx.temp_images[0]=ff_new_mp_image(w2,h);

      mpi=vf->imgctx.temp_images[0];

      break;

    }

  case MP_IMGTYPE_IP:

    if(!vf->imgctx.static_images[vf->imgctx.static_idx]) vf->imgctx.static_images[vf->imgctx.static_idx]=ff_new_mp_image(w2,h);

    mpi=vf->imgctx.static_images[vf->imgctx.static_idx];

    vf->imgctx.static_idx^=1;

    break;

  case MP_IMGTYPE_NUMBERED:

    if (number == -1) {

      int i;

      for (i = 0; i < NUM_NUMBERED_MPI; i++)

        if (!vf->imgctx.numbered_images[i] || !vf->imgctx.numbered_images[i]->usage_count)

          break;

      number = i;

    }

    if (number < 0 || number >= NUM_NUMBERED_MPI) return NULL;

    if (!vf->imgctx.numbered_images[number]) vf->imgctx.numbered_images[number] = ff_new_mp_image(w2,h);

    mpi = vf->imgctx.numbered_images[number];

    mpi->number = number;

    break;

  }

  if(mpi){

    mpi->type=mp_imgtype;

    mpi->w=vf->w; mpi->h=vf->h;

    // keep buffer allocation status & color flags only:

//    mpi->flags&=~(MP_IMGFLAG_PRESERVE|MP_IMGFLAG_READABLE|MP_IMGFLAG_DIRECT);

    mpi->flags&=MP_IMGFLAG_ALLOCATED|MP_IMGFLAG_TYPE_DISPLAYED|MP_IMGFLAGMASK_COLORS;

    // accept restrictions, draw_slice and palette flags only:

    mpi->flags|=mp_imgflag&(MP_IMGFLAGMASK_RESTRICTIONS|MP_IMGFLAG_DRAW_CALLBACK|MP_IMGFLAG_RGB_PALETTE);

    if(!vf->draw_slice) mpi->flags&=~MP_IMGFLAG_DRAW_CALLBACK;

    if(mpi->width!=w2 || mpi->height!=h){

//      printf("vf.c: MPI parameters changed!  %dx%d -> %dx%d   \n", mpi->width,mpi->height,w2,h);

        if(mpi->flags&MP_IMGFLAG_ALLOCATED){

            if(mpi->widthheight

                // need to re-allocate buffer memory:

                av_free(mpi->planes[0]);

                mpi->flags&=~MP_IMGFLAG_ALLOCATED;

                ff_mp_msg(MSGT_VFILTER,MSGL_V,"vf.c: have to REALLOCATE buffer memory :(\n");

            }

//      } else {

        } {

            mpi->width=w2; mpi->chroma_width=(w2 + (1<chroma_x_shift) - 1)>>mpi->chroma_x_shift;

            mpi->height=h; mpi->chroma_height=(h + (1<chroma_y_shift) - 1)>>mpi->chroma_y_shift;

        }

    }

    if(!mpi->bpp) ff_mp_image_setfmt(mpi,outfmt);

    if(!(mpi->flags&MP_IMGFLAG_ALLOCATED) && mpi->type>MP_IMGTYPE_EXPORT){

        av_assert0(!vf->get_image);

        // check libvo first!

        if(vf->get_image) vf->get_image(vf,mpi);

        if(!(mpi->flags&MP_IMGFLAG_DIRECT)){

          // non-direct and not yet allocated image. allocate it!

          if (!mpi->bpp) { // no way we can allocate this

              ff_mp_msg(MSGT_DECVIDEO, MSGL_FATAL,

                     "ff_vf_get_image: Tried to allocate a format that can not be allocated!\n");

              return NULL;

          }

          // check if codec prefer aligned stride:

          if(mp_imgflag&MP_IMGFLAG_PREFER_ALIGNED_STRIDE){

              int align=(mpi->flags&MP_IMGFLAG_PLANAR &&

                         mpi->flags&MP_IMGFLAG_YUV) ?

                         (8<chroma_x_shift)-1 : 15; // -- maybe FIXME

              w2=((w+align)&(~align));

              if(mpi->width!=w2){

#if 0

                  // we have to change width... check if we CAN co it:

                  int flags=vf->query_format(vf,outfmt); // should not fail

                  if(!(flags&3)) ff_mp_msg(MSGT_DECVIDEO,MSGL_WARN,"??? ff_vf_get_image{vf->query_format(outfmt)} failed!\n");

//                printf("query -> 0x%X    \n",flags);

                  if(flags&VFCAP_ACCEPT_STRIDE){

#endif

                      mpi->width=w2;

                      mpi->chroma_width=(w2 + (1<chroma_x_shift) - 1)>>mpi->chroma_x_shift;

//                  }

              }

          }

          ff_mp_image_alloc_planes(mpi);

//        printf("clearing img!\n");

          ff_vf_mpi_clear(mpi,0,0,mpi->width,mpi->height);

        }

    }

    av_assert0(!vf->start_slice);

    if(mpi->flags&MP_IMGFLAG_DRAW_CALLBACK)

        if(vf->start_slice) vf->start_slice(vf,mpi);

    if(!(mpi->flags&MP_IMGFLAG_TYPE_DISPLAYED)){

            ff_mp_msg(MSGT_DECVIDEO,MSGL_V,"*** [%s] %s%s mp_image_t, %dx%dx%dbpp %s %s, %d bytes\n",

                  "NULL"/*vf->info->name*/,

                  (mpi->type==MP_IMGTYPE_EXPORT)?"Exporting":

                  ((mpi->flags&MP_IMGFLAG_DIRECT)?"Direct Rendering":"Allocating"),

                  (mpi->flags&MP_IMGFLAG_DRAW_CALLBACK)?" (slices)":"",

                  mpi->width,mpi->height,mpi->bpp,

                  (mpi->flags&MP_IMGFLAG_YUV)?"YUV":((mpi->flags&MP_IMGFLAG_SWAPPED)?"BGR":"RGB"),

                  (mpi->flags&MP_IMGFLAG_PLANAR)?"planar":"packed",

                  mpi->bpp*mpi->width*mpi->height/8);

            ff_mp_msg(MSGT_DECVIDEO,MSGL_DBG2,"(imgfmt: %x, planes: %p,%p,%p strides: %d,%d,%d, chroma: %dx%d, shift: h:%d,v:%d)\n",

                mpi->imgfmt, mpi->planes[0], mpi->planes[1], mpi->planes[2],

                mpi->stride[0], mpi->stride[1], mpi->stride[2],

                mpi->chroma_width, mpi->chroma_height, mpi->chroma_x_shift, mpi->chroma_y_shift);

            mpi->flags|=MP_IMGFLAG_TYPE_DISPLAYED;

    }

  mpi->qscale = NULL;

  mpi->usage_count++;

  }

//    printf("\rVF_MPI: %p %p %p %d %d %d    \n",

//      mpi->planes[0],mpi->planes[1],mpi->planes[2],

//      mpi->stride[0],mpi->stride[1],mpi->stride[2]);

  return mpi;

}

int ff_vf_next_put_image(struct vf_instance *vf,mp_image_t *mpi, double pts){

    MPContext *m= (MPContext*)(((uint8_t*)vf) - offsetof(MPContext, vf));

    AVFilterLink *outlink     = m->avfctx->outputs[0];

    AVFrame *picref = av_frame_alloc();

    int i;

    av_assert0(vf->next);

    av_log(m->avfctx, AV_LOG_DEBUG, "ff_vf_next_put_image\n");

    if (!picref)

        goto fail;

    picref->width  = mpi->w;

    picref->height = mpi->h;

    picref->type = AVMEDIA_TYPE_VIDEO;

    for(i=0; conversion_map[i].fmt && mpi->imgfmt != conversion_map[i].fmt; i++);

    picref->format = conversion_map[i].pix_fmt;

    for(i=0; conversion_map[i].fmt && m->in_pix_fmt != conversion_map[i].pix_fmt; i++);

    if (mpi->imgfmt == conversion_map[i].fmt)

        picref->format = conversion_map[i].pix_fmt;

    memcpy(picref->linesize, mpi->stride, FFMIN(sizeof(picref->linesize), sizeof(mpi->stride)));

    for(i=0; i<4 && mpi->stride[i]; i++){

        picref->data[i] = mpi->planes[i];

    }

    if(pts != MP_NOPTS_VALUE)

        picref->pts= pts * av_q2d(outlink->time_base);

    if(1) { // mp buffers are currently unsupported in libavfilter, we thus must copy

        AVFrame *tofree = picref;

        picref = av_frame_clone(picref);

        av_frame_free(&tofree);

    }

    ff_filter_frame(outlink, picref);

    m->frame_returned++;

    return 1;

fail:

    av_frame_free(&picref);

    return 0;

}

int ff_vf_next_config(struct vf_instance *vf,

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

        unsigned int voflags, unsigned int outfmt){

    av_assert0(width>0 && height>0);

    vf->next->w = width; vf->next->h = height;

    return 1;

#if 0

    int flags=vf->next->query_format(vf->next,outfmt);

    if(!flags){

        // hmm. colorspace mismatch!!!

        //this is fatal for us ATM

        return 0;

    }

    ff_mp_msg(MSGT_VFILTER,MSGL_V,"REQ: flags=0x%X  req=0x%X  \n",flags,vf->default_reqs);

    miss=vf->default_reqs - (flags&vf->default_reqs);

    if(miss&VFCAP_ACCEPT_STRIDE){

        // vf requires stride support but vf->next doesn't support it!

        // let's insert the 'expand' filter, it does the job for us:

        vf_instance_t* vf2=vf_open_filter(vf->next,"expand",NULL);

        if(!vf2) return 0; // shouldn't happen!

        vf->next=vf2;

    }

    vf->next->w = width; vf->next->h = height;

    return 1;

#endif

}

int ff_vf_next_control(struct vf_instance *vf, int request, void* data){

    MPContext *m= (MPContext*)(((uint8_t*)vf) - offsetof(MPContext, vf));

    av_log(m->avfctx, AV_LOG_DEBUG, "Received control %d\n", request);

    return 0;

}

static int vf_default_query_format(struct vf_instance *vf, unsigned int fmt){

    MPContext *m= (MPContext*)(((uint8_t*)vf) - offsetof(MPContext, vf));

    int i;

    av_log(m->avfctx, AV_LOG_DEBUG, "query %X\n", fmt);

    for(i=0; conversion_map[i].fmt; i++){

        if(fmt==conversion_map[i].fmt)

            return 1; //we suport all

    }

    return 0;

}

static av_cold int init(AVFilterContext *ctx)

{

    MPContext *m = ctx->priv;

    int cpu_flags = av_get_cpu_flags();

    char name[256];

    const char *args;

    int i;

    ff_gCpuCaps.hasMMX      = cpu_flags & AV_CPU_FLAG_MMX;

    ff_gCpuCaps.hasMMX2     = cpu_flags & AV_CPU_FLAG_MMX2;

    ff_gCpuCaps.hasSSE      = cpu_flags & AV_CPU_FLAG_SSE;

    ff_gCpuCaps.hasSSE2     = cpu_flags & AV_CPU_FLAG_SSE2;

    ff_gCpuCaps.hasSSE3     = cpu_flags & AV_CPU_FLAG_SSE3;

    ff_gCpuCaps.hasSSSE3    = cpu_flags & AV_CPU_FLAG_SSSE3;

    ff_gCpuCaps.hasSSE4     = cpu_flags & AV_CPU_FLAG_SSE4;

    ff_gCpuCaps.hasSSE42    = cpu_flags & AV_CPU_FLAG_SSE42;

    ff_gCpuCaps.hasAVX      = cpu_flags & AV_CPU_FLAG_AVX;

    ff_gCpuCaps.has3DNow    = cpu_flags & AV_CPU_FLAG_3DNOW;

    ff_gCpuCaps.has3DNowExt = cpu_flags & AV_CPU_FLAG_3DNOWEXT;

    m->avfctx= ctx;

    args = m->filter;

    if(!args || 1!=sscanf(args, "%255[^:=]", name)){

        av_log(ctx, AV_LOG_ERROR, "Invalid parameter.\n");

        return AVERROR(EINVAL);

    }

    args += strlen(name);

    if (args[0] == '=')

        args++;

    for(i=0; ;i++){

        if(!filters[i] || !strcmp(name, filters[i]->name))

            break;

    }

    if(!filters[i]){

        av_log(ctx, AV_LOG_ERROR, "Unknown filter %s\n", name);

        return AVERROR(EINVAL);

    }

    av_log(ctx, AV_LOG_WARNING,

           "'%s' is a wrapped MPlayer filter (libmpcodecs). This filter may be removed\n"

           "once it has been ported to a native libavfilter.\n", name);

    memset(&m->vf,0,sizeof(m->vf));

    m->vf.info= filters[i];

    m->vf.next        = &m->next_vf;

    m->vf.put_image   = ff_vf_next_put_image;

    m->vf.config      = ff_vf_next_config;

    m->vf.query_format= vf_default_query_format;

    m->vf.control     = ff_vf_next_control;

    m->vf.default_caps=VFCAP_ACCEPT_STRIDE;

    m->vf.default_reqs=0;

    if(m->vf.info->opts)

        av_log(ctx, AV_LOG_ERROR, "opts / m_struct_set is unsupported\n");

#if 0

    if(vf->info->opts) { // vf_vo get some special argument

      const m_struct_t* st = vf->info->opts;

      void* vf_priv = m_struct_alloc(st);

      int n;

      for(n = 0 ; args && args[2*n] ; n++)

        m_struct_set(st,vf_priv,args[2*n],args[2*n+1]);

      vf->priv = vf_priv;

      args = NULL;

    } else // Otherwise we should have the '_oldargs_'

      if(args && !strcmp(args[0],"_oldargs_"))

        args = (char**)args[1];

      else

        args = NULL;

#endif

    if(m->vf.info->vf_open(&m->vf, (char*)args)<=0){

        av_log(ctx, AV_LOG_ERROR, "vf_open() of %s with arg=%s failed\n", name, args);

        return -1;

    }

    return 0;

}

static av_cold void uninit(AVFilterContext *ctx)

{

    MPContext *m = ctx->priv;

    vf_instance_t *vf = &m->vf;

    while(vf){

        vf_instance_t *next = vf->next;

        if(vf->uninit)

            vf->uninit(vf);

        ff_free_mp_image(vf->imgctx.static_images[0]);

        ff_free_mp_image(vf->imgctx.static_images[1]);

        ff_free_mp_image(vf->imgctx.temp_images[0]);

        ff_free_mp_image(vf->imgctx.export_images[0]);

        vf = next;

    }

}

static int query_formats(AVFilterContext *ctx)

{

    AVFilterFormats *avfmts=NULL;

    MPContext *m = ctx->priv;

    enum AVPixelFormat lastpixfmt = AV_PIX_FMT_NONE;

    int i;

    for(i=0; conversion_map[i].fmt; i++){

        av_log(ctx, AV_LOG_DEBUG, "query: %X\n", conversion_map[i].fmt);

        if(m->vf.query_format(&m->vf, conversion_map[i].fmt)){

            av_log(ctx, AV_LOG_DEBUG, "supported,adding\n");

            if (conversion_map[i].pix_fmt != lastpixfmt) {

                ff_add_format(&avfmts, conversion_map[i].pix_fmt);

                lastpixfmt = conversion_map[i].pix_fmt;

            }

        }

    }

    if (!avfmts)

        return -1;

    //We assume all allowed input formats are also allowed output formats

    ff_set_common_formats(ctx, avfmts);

    return 0;

}

static int config_inprops(AVFilterLink *inlink)

{

    MPContext *m = inlink->dst->priv;

    int i;

    for(i=0; conversion_map[i].fmt && conversion_map[i].pix_fmt != inlink->format; i++);

    av_assert0(conversion_map[i].fmt && inlink->w && inlink->h);

    m->vf.fmt.have_configured = 1;

    m->vf.fmt.orig_height     = inlink->h;

    m->vf.fmt.orig_width      = inlink->w;

    m->vf.fmt.orig_fmt        = conversion_map[i].fmt;

    if(m->vf.config(&m->vf, inlink->w, inlink->h, inlink->w, inlink->h, 0, conversion_map[i].fmt)<=0)

        return -1;

    return 0;

}

static int config_outprops(AVFilterLink *outlink)

{

    MPContext *m = outlink->src->priv;

    outlink->w = m->next_vf.w;

    outlink->h = m->next_vf.h;

    return 0;

}

static int request_frame(AVFilterLink *outlink)

{

    MPContext *m = outlink->src->priv;

    int ret;

    av_log(m->avfctx, AV_LOG_DEBUG, "mp request_frame\n");

    for(m->frame_returned=0; !m->frame_returned;){

        ret=ff_request_frame(outlink->src->inputs[0]);

        if(ret<0)

            break;

    }

    av_log(m->avfctx, AV_LOG_DEBUG, "mp request_frame ret=%d\n", ret);

    return ret;

}

static int filter_frame(AVFilterLink *inlink, AVFrame *inpic)

{

    MPContext *m = inlink->dst->priv;

    int i;

    double pts= MP_NOPTS_VALUE;

    mp_image_t* mpi = ff_new_mp_image(inpic->width, inpic->height);

    if(inpic->pts != AV_NOPTS_VALUE)

        pts= inpic->pts / av_q2d(inlink->time_base);

    for(i=0; conversion_map[i].fmt && conversion_map[i].pix_fmt != inlink->format; i++);

    ff_mp_image_setfmt(mpi,conversion_map[i].fmt);

    m->in_pix_fmt = inlink->format;

    memcpy(mpi->planes, inpic->data,     FFMIN(sizeof(inpic->data)    , sizeof(mpi->planes)));

    memcpy(mpi->stride, inpic->linesize, FFMIN(sizeof(inpic->linesize), sizeof(mpi->stride)));

    if (inpic->interlaced_frame)

        mpi->fields |= MP_IMGFIELD_INTERLACED;

    if (inpic->top_field_first)

        mpi->fields |= MP_IMGFIELD_TOP_FIRST;

    if (inpic->repeat_pict)

        mpi->fields |= MP_IMGFIELD_REPEAT_FIRST;

    // mpi->flags|=MP_IMGFLAG_ALLOCATED; ?

    mpi->flags |= MP_IMGFLAG_READABLE;

    if(!av_frame_is_writable(inpic))

        mpi->flags |= MP_IMGFLAG_PRESERVE;

    if(m->vf.put_image(&m->vf, mpi, pts) == 0){

        av_log(m->avfctx, AV_LOG_DEBUG, "put_image() says skip\n");

    }else{

        av_frame_free(&inpic);

    }

    ff_free_mp_image(mpi);

    return 0;

}

static const AVFilterPad mp_inputs[] = {

    {

        .name         = "default",

        .type         = AVMEDIA_TYPE_VIDEO,

        .filter_frame = filter_frame,

        .config_props = config_inprops,

    },

    { NULL }

};

static const AVFilterPad mp_outputs[] = {

    {

        .name          = "default",

        .type          = AVMEDIA_TYPE_VIDEO,

        .request_frame = request_frame,

        .config_props  = config_outprops,

    },

    { NULL }

};

AVFilter avfilter_vf_mp = {

    .name          = "mp",

    .description   = NULL_IF_CONFIG_SMALL("Apply a libmpcodecs filter to the input video."),

    .init          = init,

    .uninit        = uninit,

    .priv_size     = sizeof(MPContext),

    .query_formats = query_formats,

    .inputs        = mp_inputs,

    .outputs       = mp_outputs,

    .priv_class    = &mp_class,

};