/*

  * This file is part of FFmpeg.

  *

  * FFmpeg is free software; you can redistribute it and/or

  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 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
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser 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
  */
 
 #include "error_resilience.h"
 #include "mpegvideo.h"
 #include "mpeg_er.h"
 
 static void set_erpic(ERPicture *dst, Picture *src)
 {
     int i;
 

     memset(dst, 0, sizeof(*dst));

     if (!src) {
         dst->f  = NULL;
         dst->tf = NULL;
         return;
     }
 
     dst->f = src->f;
     dst->tf = &src->tf;
 
     for (i = 0; i < 2; i++) {
         dst->motion_val[i] = src->motion_val[i];
         dst->ref_index[i] = src->ref_index[i];
     }
 
     dst->mb_type = src->mb_type;
     dst->field_picture = src->field_picture;
 }
 
 void ff_mpeg_er_frame_start(MpegEncContext *s)
 {
     ERContext *er = &s->er;
 
     set_erpic(&er->cur_pic,  s->current_picture_ptr);
     set_erpic(&er->next_pic, s->next_picture_ptr);
     set_erpic(&er->last_pic, s->last_picture_ptr);
 
     er->pp_time           = s->pp_time;
     er->pb_time           = s->pb_time;
     er->quarter_sample    = s->quarter_sample;
     er->partitioned_frame = s->partitioned_frame;
 
     ff_er_frame_start(er);
 }

 
 static void mpeg_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
                               int (*mv)[2][4][2], int mb_x, int mb_y,
                               int mb_intra, int mb_skipped)
 {
     MpegEncContext *s = opaque;
 
     s->mv_dir     = mv_dir;
     s->mv_type    = mv_type;
     s->mb_intra   = mb_intra;
     s->mb_skipped = mb_skipped;
     s->mb_x       = mb_x;
     s->mb_y       = mb_y;
     memcpy(s->mv, mv, sizeof(*mv));
 
     ff_init_block_index(s);
     ff_update_block_index(s);
 
     s->bdsp.clear_blocks(s->block[0]);
 
     s->dest[0] = s->current_picture.f->data[0] +
                  s->mb_y * 16 * s->linesize +
                  s->mb_x * 16;
     s->dest[1] = s->current_picture.f->data[1] +
                  s->mb_y * (16 >> s->chroma_y_shift) * s->uvlinesize +
                  s->mb_x * (16 >> s->chroma_x_shift);
     s->dest[2] = s->current_picture.f->data[2] +
                  s->mb_y * (16 >> s->chroma_y_shift) * s->uvlinesize +
                  s->mb_x * (16 >> s->chroma_x_shift);
 
     if (ref)
         av_log(s->avctx, AV_LOG_DEBUG,
                "Interlaced error concealment is not fully implemented\n");
     ff_mpv_decode_mb(s, s->block);
 }
 
 int ff_mpeg_er_init(MpegEncContext *s)
 {
     ERContext *er = &s->er;
     int mb_array_size = s->mb_height * s->mb_stride;
     int i;
 
     er->avctx       = s->avctx;
 
     er->mb_index2xy = s->mb_index2xy;
     er->mb_num      = s->mb_num;
     er->mb_width    = s->mb_width;
     er->mb_height   = s->mb_height;
     er->mb_stride   = s->mb_stride;
     er->b8_stride   = s->b8_stride;
 
     er->er_temp_buffer     = av_malloc(s->mb_height * s->mb_stride);
     er->error_status_table = av_mallocz(mb_array_size);
     if (!er->er_temp_buffer || !er->error_status_table)
         goto fail;
 
     er->mbskip_table  = s->mbskip_table;
     er->mbintra_table = s->mbintra_table;
 
     for (i = 0; i < FF_ARRAY_ELEMS(s->dc_val); i++)
         er->dc_val[i] = s->dc_val[i];
 
     er->decode_mb = mpeg_er_decode_mb;
     er->opaque    = s;
 
     return 0;
 fail:
     av_freep(&er->er_temp_buffer);
     av_freep(&er->error_status_table);
     return AVERROR(ENOMEM);
 }