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   1 /*
   2  * XVideo Motion Compensation
   3  * Copyright (c) 2003 Ivan Kalvachev
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include <limits.h>
  23
  24 //avcodec include
  25 #include "avcodec.h"
  26 #include "dsputil.h"
  27 #include "mpegvideo.h"
  28
  29 #undef NDEBUG
  30 #include <assert.h>
  31
  32 #ifdef USE_FASTMEMCPY
  33 #include "libvo/fastmemcpy.h"
  34 #endif
  35
  36 #ifdef HAVE_XVMC
  37
  38 //X11 includes are in the xvmc_render.h
  39 //by replacing it with none-X one
  40 //XvMC emulation could be performed
  41
  42 #include "xvmc_render.h"
  43
  44 //#include "xvmc_debug.h"
  45
  46 //set s->block
  47 inline void XVMC_init_block(MpegEncContext *s){
  48 xvmc_render_state_t * render;
  49     render = (xvmc_render_state_t*)s->current_picture.data[2];
  50     assert(render != NULL);
  51     if( (render == NULL) || (render->magic != MP_XVMC_RENDER_MAGIC) ){
  52         assert(0);
  53         return;//make sure that this is render packet
  54     }
  55     s->block =(DCTELEM *)(render->data_blocks+(render->next_free_data_block_num)*64);
  56 }
  57
  58 void XVMC_pack_pblocks(MpegEncContext *s, int cbp){
  59 int i,j;
  60 const int mb_block_count = 4+(1<<s->chroma_format);
  61
  62     j=0;
  63     cbp<<= 12-mb_block_count;
  64     for(i=0; i<mb_block_count; i++){
  65         if(cbp & (1<<11)) {
  66            s->pblocks[i] = (short *)(&s->block[(j++)]);
  67         }else{
  68            s->pblocks[i] = NULL;
  69         }
  70         cbp+=cbp;
  71 //        printf("s->pblocks[%d]=%p ,s->block=%p cbp=%d\n",i,s->pblocks[i],s->block,cbp);
  72     }
  73 }
  74
  75 //these functions should be called on every new field or/and frame
  76 //They should be safe if they are called few times for same field!
  77 int XVMC_field_start(MpegEncContext*s, AVCodecContext *avctx){
  78 xvmc_render_state_t * render,* last, * next;
  79
  80     assert(avctx != NULL);
  81
  82     render = (xvmc_render_state_t*)s->current_picture.data[2];
  83     assert(render != NULL);
  84     if( (render == NULL) || (render->magic != MP_XVMC_RENDER_MAGIC) )
  85         return -1;//make sure that this is render packet
  86
  87     render->picture_structure = s->picture_structure;
  88     render->flags = (s->first_field)? 0: XVMC_SECOND_FIELD;
  89
  90 //make sure that all data is drawn by XVMC_end_frame
  91     assert(render->filled_mv_blocks_num==0);
  92
  93     render->p_future_surface = NULL;
  94     render->p_past_surface = NULL;
  95
  96     switch(s->pict_type){
  97         case  I_TYPE:
  98             return 0;// no prediction from other frames
  99         case  B_TYPE:
 100             next = (xvmc_render_state_t*)s->next_picture.data[2];
 101             assert(next!=NULL);
 102             assert(next->state & MP_XVMC_STATE_PREDICTION);
 103             if(next == NULL) return -1;
 104             if(next->magic != MP_XVMC_RENDER_MAGIC) return -1;
 105             render->p_future_surface = next->p_surface;
 106             //no return here, going to set forward prediction
 107         case  P_TYPE:
 108             last = (xvmc_render_state_t*)s->last_picture.data[2];
 109             if(last == NULL)// && !s->first_field)
 110                 last = render;//predict second field from the first
 111             if(last->magic != MP_XVMC_RENDER_MAGIC) return -1;
 112             assert(last->state & MP_XVMC_STATE_PREDICTION);
 113             render->p_past_surface = last->p_surface;
 114             return 0;
 115     }
 116
 117 return -1;
 118 }
 119
 120 void XVMC_field_end(MpegEncContext *s){
 121 xvmc_render_state_t * render;
 122     render = (xvmc_render_state_t*)s->current_picture.data[2];
 123     assert(render != NULL);
 124
 125     if(render->filled_mv_blocks_num > 0){
 126 //        printf("xvmcvideo.c: rendering %d left blocks after last slice!!!\n",render->filled_mv_blocks_num );
 127         ff_draw_horiz_band(s,0,0);
 128     }
 129 }
 130
 131 void XVMC_decode_mb(MpegEncContext *s){
 132 XvMCMacroBlock * mv_block;
 133 xvmc_render_state_t * render;
 134 int i,cbp,blocks_per_mb;
 135
 136 const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
 137
 138
 139     if(s->encoding){
 140         av_log(s->avctx, AV_LOG_ERROR, "XVMC doesn't support encoding!!!\n");
 141         return;
 142     }
 143
 144    //from MPV_decode_mb(),
 145     /* update DC predictors for P macroblocks */
 146     if (!s->mb_intra) {
 147         s->last_dc[0] =
 148         s->last_dc[1] =
 149         s->last_dc[2] =  128 << s->intra_dc_precision;
 150     }
 151
 152    //MC doesn't skip blocks
 153     s->mb_skipped = 0;
 154
 155
 156    // do I need to export quant when I could not perform postprocessing?
 157    // anyway, it doesn't hurrt
 158     s->current_picture.qscale_table[mb_xy] = s->qscale;
 159
 160 //START OF XVMC specific code
 161     render = (xvmc_render_state_t*)s->current_picture.data[2];
 162     assert(render!=NULL);
 163     assert(render->magic==MP_XVMC_RENDER_MAGIC);
 164     assert(render->mv_blocks);
 165
 166     //take the next free macroblock
 167     mv_block = &render->mv_blocks[render->start_mv_blocks_num +
 168                                    render->filled_mv_blocks_num ];
 169
 170 // memset(mv_block,0,sizeof(XvMCMacroBlock));
 171
 172     mv_block->x = s->mb_x;
 173     mv_block->y = s->mb_y;
 174     mv_block->dct_type = s->interlaced_dct;//XVMC_DCT_TYPE_FRAME/FIELD;
 175 //    mv_block->motion_type = 0;  //zero to silense warnings
 176     if(s->mb_intra){
 177         mv_block->macroblock_type = XVMC_MB_TYPE_INTRA;//no MC, all done
 178     }else{
 179         mv_block->macroblock_type = XVMC_MB_TYPE_PATTERN;
 180
 181         if(s->mv_dir & MV_DIR_FORWARD){
 182             mv_block->macroblock_type|= XVMC_MB_TYPE_MOTION_FORWARD;
 183             //pmv[n][dir][xy]=mv[dir][n][xy]
 184             mv_block->PMV[0][0][0] = s->mv[0][0][0];
 185             mv_block->PMV[0][0][1] = s->mv[0][0][1];
 186             mv_block->PMV[1][0][0] = s->mv[0][1][0];
 187             mv_block->PMV[1][0][1] = s->mv[0][1][1];
 188         }
 189         if(s->mv_dir & MV_DIR_BACKWARD){
 190             mv_block->macroblock_type|=XVMC_MB_TYPE_MOTION_BACKWARD;
 191             mv_block->PMV[0][1][0] = s->mv[1][0][0];
 192             mv_block->PMV[0][1][1] = s->mv[1][0][1];
 193             mv_block->PMV[1][1][0] = s->mv[1][1][0];
 194             mv_block->PMV[1][1][1] = s->mv[1][1][1];
 195         }
 196
 197         switch(s->mv_type){
 198             case  MV_TYPE_16X16:
 199                 mv_block->motion_type = XVMC_PREDICTION_FRAME;
 200                 break;
 201             case  MV_TYPE_16X8:
 202                 mv_block->motion_type = XVMC_PREDICTION_16x8;
 203                 break;
 204             case  MV_TYPE_FIELD:
 205                 mv_block->motion_type = XVMC_PREDICTION_FIELD;
 206                 if(s->picture_structure == PICT_FRAME){
 207                     mv_block->PMV[0][0][1]<<=1;
 208                     mv_block->PMV[1][0][1]<<=1;
 209                     mv_block->PMV[0][1][1]<<=1;
 210                     mv_block->PMV[1][1][1]<<=1;
 211                 }
 212                 break;
 213             case  MV_TYPE_DMV:
 214                 mv_block->motion_type = XVMC_PREDICTION_DUAL_PRIME;
 215                 if(s->picture_structure == PICT_FRAME){
 216
 217                     mv_block->PMV[0][0][0] = s->mv[0][0][0];//top from top
 218                     mv_block->PMV[0][0][1] = s->mv[0][0][1]<<1;
 219
 220                     mv_block->PMV[0][1][0] = s->mv[0][0][0];//bottom from bottom
 221                     mv_block->PMV[0][1][1] = s->mv[0][0][1]<<1;
 222
 223                     mv_block->PMV[1][0][0] = s->mv[0][2][0];//dmv00, top from bottom
 224                     mv_block->PMV[1][0][1] = s->mv[0][2][1]<<1;//dmv01
 225
 226                     mv_block->PMV[1][1][0] = s->mv[0][3][0];//dmv10, bottom from top
 227                     mv_block->PMV[1][1][1] = s->mv[0][3][1]<<1;//dmv11
 228
 229                 }else{
 230                     mv_block->PMV[0][1][0] = s->mv[0][2][0];//dmv00
 231                     mv_block->PMV[0][1][1] = s->mv[0][2][1];//dmv01
 232                 }
 233                 break;
 234             default:
 235                 assert(0);
 236         }
 237
 238         mv_block->motion_vertical_field_select = 0;
 239
 240 //set correct field referenses
 241         if(s->mv_type == MV_TYPE_FIELD || s->mv_type == MV_TYPE_16X8){
 242             if( s->field_select[0][0] ) mv_block->motion_vertical_field_select|=1;
 243             if( s->field_select[1][0] ) mv_block->motion_vertical_field_select|=2;
 244             if( s->field_select[0][1] ) mv_block->motion_vertical_field_select|=4;
 245             if( s->field_select[1][1] ) mv_block->motion_vertical_field_select|=8;
 246         }
 247     }//!intra
 248 //time to handle data blocks;
 249     mv_block->index = render->next_free_data_block_num;
 250
 251     blocks_per_mb = 6;
 252     if( s->chroma_format >= 2){
 253         blocks_per_mb = 4 + (1 << (s->chroma_format));
 254     }
 255
 256 //  calculate cbp
 257     cbp = 0;
 258     for(i=0; i<blocks_per_mb; i++) {
 259         cbp+= cbp;
 260         if(s->block_last_index[i] >= 0)
 261             cbp++;
 262     }
 263
 264     if(s->flags & CODEC_FLAG_GRAY){
 265         if(s->mb_intra){//intra frames are alwasy full chroma block
 266             for(i=4; i<blocks_per_mb; i++){
 267                 memset(s->pblocks[i],0,sizeof(short)*8*8);//so we need to clear them
 268                 if(!render->unsigned_intra)
 269                     s->pblocks[i][0] = 1<<10;
 270             }
 271         }else{
 272             cbp&= 0xf << (blocks_per_mb - 4);
 273             blocks_per_mb = 4;//Luminance blocks only
 274         }
 275     }
 276     mv_block->coded_block_pattern = cbp;
 277     if(cbp == 0)
 278         mv_block->macroblock_type &= ~XVMC_MB_TYPE_PATTERN;
 279
 280     for(i=0; i<blocks_per_mb; i++){
 281         if(s->block_last_index[i] >= 0){
 282             // i do not have unsigned_intra MOCO to test, hope it is OK
 283             if( (s->mb_intra) && ( render->idct || (!render->idct && !render->unsigned_intra)) )
 284                 s->pblocks[i][0]-=1<<10;
 285             if(!render->idct){
 286                 s->dsp.idct(s->pblocks[i]);
 287                 //!!TODO!clip!!!
 288             }
 289 //copy blocks only if the codec doesn't support pblocks reordering
 290             if(s->avctx->xvmc_acceleration == 1){
 291                 memcpy(&render->data_blocks[(render->next_free_data_block_num)*64],
 292                         s->pblocks[i],sizeof(short)*8*8);
 293             }else{
 294 /*              if(s->pblocks[i] != &render->data_blocks[
 295                         (render->next_free_data_block_num)*64]){
 296                    printf("ERROR mb(%d,%d) s->pblocks[i]=%p data_block[]=%p\n",
 297                    s->mb_x,s->mb_y, s->pblocks[i],
 298                    &render->data_blocks[(render->next_free_data_block_num)*64]);
 299                 }*/
 300             }
 301             render->next_free_data_block_num++;
 302         }
 303     }
 304     render->filled_mv_blocks_num++;
 305
 306     assert(render->filled_mv_blocks_num <= render->total_number_of_mv_blocks);
 307     assert(render->next_free_data_block_num <= render->total_number_of_data_blocks);
 308
 309
 310     if(render->filled_mv_blocks_num >= render->total_number_of_mv_blocks)
 311         ff_draw_horiz_band(s,0,0);
 312
 313 // DumpRenderInfo(render);
 314 // DumpMBlockInfo(mv_block);
 315
 316 }
 317
 318 #endif