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   1 /*
   2  * XVideo Motion Compensation
   3  * Copyright (c) 2003 Ivan Kalvachev
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 #include <limits.h>
  21
  22 //avcodec include
  23 #include "avcodec.h"
  24 #include "dsputil.h"
  25 #include "mpegvideo.h"
  26
  27 #undef NDEBUG
  28 #include <assert.h>
  29
  30 #ifdef USE_FASTMEMCPY
  31 #include "fastmemcpy.h"
  32 #endif
  33
  34 #ifdef HAVE_XVMC
  35
  36 //X11 includes are in the xvmc_render.h
  37 //by replacing it with none-X one
  38 //XvMC emulation could be performed
  39
  40 #include "xvmc_render.h"
  41
  42 //#include "xvmc_debug.h"
  43
  44 //set s->block
  45 inline void XVMC_init_block(MpegEncContext *s){
  46 xvmc_render_state_t * render;
  47     render = (xvmc_render_state_t*)s->current_picture.data[2];
  48     assert(render != NULL);
  49     if( (render == NULL) || (render->magic != MP_XVMC_RENDER_MAGIC) ){
  50         assert(0);
  51         return;//make sure that this is render packet
  52     }
  53     s->block =(DCTELEM *)(render->data_blocks+(render->next_free_data_block_num)*64);
  54 }
  55
  56 void XVMC_pack_pblocks(MpegEncContext *s, int cbp){
  57 int i,j;
  58 #define numblocks 6
  59
  60     j=0;
  61     for(i=0;i<numblocks;i++){
  62         if(cbp & (1<<(numblocks-1-i)) ){
  63            s->pblocks[i] = (short *)(&s->block[(j++)]);
  64         }else{
  65            s->pblocks[i] = NULL;
  66         }
  67 //        printf("s->pblocks[%d]=%p ,s->block=%p cbp=%d\n",i,s->pblocks[i],s->block,cbp);
  68     }
  69 }
  70
  71 static int calc_cbp(MpegEncContext *s, int blocknum){
  72 /* compute cbp */
  73 // for I420 bit_offset=5
  74 int  i,cbp = 0;
  75     for(i=0; i<blocknum; i++) {
  76         if(s->block_last_index[i] >= 0)
  77             cbp |= 1 << (5 - i);
  78     }
  79     return cbp;
  80 }
  81
  82
  83
  84 //these functions should be called on every new field or/and frame
  85 //They should be safe if they are called few times for same field!
  86 int XVMC_field_start(MpegEncContext*s, AVCodecContext *avctx){
  87 xvmc_render_state_t * render,* last, * next;
  88
  89     assert(avctx != NULL);
  90
  91     render = (xvmc_render_state_t*)s->current_picture.data[2];
  92     assert(render != NULL);
  93     if( (render == NULL) || (render->magic != MP_XVMC_RENDER_MAGIC) )
  94         return -1;//make sure that this is render packet
  95
  96     render->picture_structure = s->picture_structure;
  97     render->flags = (s->first_field)? 0: XVMC_SECOND_FIELD;
  98
  99 //make sure that all data is drawn by XVMC_end_frame
 100     assert(render->filled_mv_blocks_num==0);
 101
 102     render->p_future_surface = NULL;
 103     render->p_past_surface = NULL;
 104
 105     switch(s->pict_type){
 106         case  I_TYPE:
 107             return 0;// no prediction from other frames
 108         case  B_TYPE:
 109             next = (xvmc_render_state_t*)s->next_picture.data[2];
 110             assert(next!=NULL);
 111             assert(next->state & MP_XVMC_STATE_PREDICTION);
 112             if(next == NULL) return -1;
 113             if(next->magic != MP_XVMC_RENDER_MAGIC) return -1;
 114             render->p_future_surface = next->p_surface;
 115             //no return here, going to set forward prediction
 116         case  P_TYPE:
 117             last = (xvmc_render_state_t*)s->last_picture.data[2];
 118             if(last == NULL)// && !s->first_field)
 119                 last = render;//predict second field from the first
 120             if(last->magic != MP_XVMC_RENDER_MAGIC) return -1;
 121             assert(last->state & MP_XVMC_STATE_PREDICTION);
 122             render->p_past_surface = last->p_surface;
 123             return 0;
 124      }
 125
 126 return -1;
 127 }
 128
 129 void XVMC_field_end(MpegEncContext *s){
 130 xvmc_render_state_t * render;
 131     render = (xvmc_render_state_t*)s->current_picture.data[2];
 132     assert(render != NULL);
 133
 134     if(render->filled_mv_blocks_num > 0){
 135 //        printf("xvmcvideo.c: rendering %d left blocks after last slice!!!\n",render->filled_mv_blocks_num );
 136         ff_draw_horiz_band(s,0,0);
 137     }
 138 }
 139
 140 void XVMC_decode_mb(MpegEncContext *s){
 141 XvMCMacroBlock * mv_block;
 142 xvmc_render_state_t * render;
 143 int i,cbp,blocks_per_mb;
 144
 145 const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
 146
 147
 148     if(s->encoding){
 149         fprintf(stderr,"XVMC doesn't support encoding!!!\n");
 150         av_abort();
 151     }
 152
 153    //from MPV_decode_mb(),
 154     /* update DC predictors for P macroblocks */
 155     if (!s->mb_intra) {
 156         s->last_dc[0] =
 157         s->last_dc[1] =
 158         s->last_dc[2] =  128 << s->intra_dc_precision;
 159     }
 160
 161    //MC doesn't skip blocks
 162     s->mb_skiped = 0;
 163
 164
 165    // do I need to export quant when I could not perform postprocessing?
 166    // anyway, it doesn't hurrt
 167     s->current_picture.qscale_table[mb_xy] = s->qscale;
 168
 169 //START OF XVMC specific code
 170     render = (xvmc_render_state_t*)s->current_picture.data[2];
 171     assert(render!=NULL);
 172     assert(render->magic==MP_XVMC_RENDER_MAGIC);
 173     assert(render->mv_blocks);
 174
 175     //take the next free macroblock
 176     mv_block = &render->mv_blocks[render->start_mv_blocks_num +
 177                                    render->filled_mv_blocks_num ];
 178
 179 // memset(mv_block,0,sizeof(XvMCMacroBlock));
 180
 181     mv_block->x = s->mb_x;
 182     mv_block->y = s->mb_y;
 183     mv_block->dct_type = s->interlaced_dct;//XVMC_DCT_TYPE_FRAME/FIELD;
 184 //    mv_block->motion_type = 0;  //zero to silense warnings
 185     if(s->mb_intra){
 186         mv_block->macroblock_type = XVMC_MB_TYPE_INTRA;//no MC, all done
 187     }else{
 188         mv_block->macroblock_type = XVMC_MB_TYPE_PATTERN;
 189
 190         if(s->mv_dir & MV_DIR_FORWARD){
 191             mv_block->macroblock_type|= XVMC_MB_TYPE_MOTION_FORWARD;
 192             //pmv[n][dir][xy]=mv[dir][n][xy]
 193             mv_block->PMV[0][0][0] = s->mv[0][0][0];
 194             mv_block->PMV[0][0][1] = s->mv[0][0][1];
 195             mv_block->PMV[1][0][0] = s->mv[0][1][0];
 196             mv_block->PMV[1][0][1] = s->mv[0][1][1];
 197         }
 198         if(s->mv_dir & MV_DIR_BACKWARD){
 199             mv_block->macroblock_type|=XVMC_MB_TYPE_MOTION_BACKWARD;
 200             mv_block->PMV[0][1][0] = s->mv[1][0][0];
 201             mv_block->PMV[0][1][1] = s->mv[1][0][1];
 202             mv_block->PMV[1][1][0] = s->mv[1][1][0];
 203             mv_block->PMV[1][1][1] = s->mv[1][1][1];
 204         }
 205
 206         switch(s->mv_type){
 207             case  MV_TYPE_16X16:
 208                 mv_block->motion_type = XVMC_PREDICTION_FRAME;
 209                 break;
 210             case  MV_TYPE_16X8:
 211                 mv_block->motion_type = XVMC_PREDICTION_16x8;
 212                 break;
 213             case  MV_TYPE_FIELD:
 214                 mv_block->motion_type = XVMC_PREDICTION_FIELD;
 215                 if(s->picture_structure == PICT_FRAME){
 216                     mv_block->PMV[0][0][1]<<=1;
 217                     mv_block->PMV[1][0][1]<<=1;
 218                     mv_block->PMV[0][1][1]<<=1;
 219                     mv_block->PMV[1][1][1]<<=1;
 220                 }
 221                 break;
 222             case  MV_TYPE_DMV:
 223                 mv_block->motion_type = XVMC_PREDICTION_DUAL_PRIME;
 224                 if(s->picture_structure == PICT_FRAME){
 225
 226                     mv_block->PMV[0][0][0] = s->mv[0][0][0];//top from top
 227                     mv_block->PMV[0][0][1] = s->mv[0][0][1]<<1;
 228
 229                     mv_block->PMV[0][1][0] = s->mv[0][0][0];//bottom from bottom
 230                     mv_block->PMV[0][1][1] = s->mv[0][0][1]<<1;
 231
 232                     mv_block->PMV[1][0][0] = s->mv[0][2][0];//dmv00, top from bottom
 233                     mv_block->PMV[1][0][1] = s->mv[0][2][1]<<1;//dmv01
 234
 235                     mv_block->PMV[1][1][0] = s->mv[0][3][0];//dmv10, bottom from top
 236                     mv_block->PMV[1][1][1] = s->mv[0][3][1]<<1;//dmv11
 237
 238                 }else{
 239                     mv_block->PMV[0][1][0] = s->mv[0][2][0];//dmv00
 240                     mv_block->PMV[0][1][1] = s->mv[0][2][1];//dmv01
 241                 }
 242                 break;
 243             default:
 244                 assert(0);
 245         }
 246
 247         mv_block->motion_vertical_field_select = 0;
 248
 249 //set correct field referenses
 250         if(s->mv_type == MV_TYPE_FIELD || s->mv_type == MV_TYPE_16X8){
 251             if( s->field_select[0][0] ) mv_block->motion_vertical_field_select|=1;
 252             if( s->field_select[1][0] ) mv_block->motion_vertical_field_select|=2;
 253             if( s->field_select[0][1] ) mv_block->motion_vertical_field_select|=4;
 254             if( s->field_select[1][1] ) mv_block->motion_vertical_field_select|=8;
 255         }
 256     }//!intra
 257 //time to handle data blocks;
 258     mv_block->index = render->next_free_data_block_num;
 259     blocks_per_mb = 6;
 260 /*
 261     switch( s->chroma_format){
 262         case CHROMA_422:
 263             blocks_per_mb = 8;
 264             break;
 265         case CHROMA_444:
 266             blocks_per_mb = 12;
 267             break;
 268     }
 269 */
 270     if(s->flags & CODEC_FLAG_GRAY){
 271         if(s->mb_intra){//intra frames are alwasy full chroma block
 272             for(i=4; i<blocks_per_mb; i++){
 273                 memset(s->pblocks[i],0,sizeof(short)*8*8);//so we need to clear them
 274                 if(!render->unsigned_intra)
 275                     s->pblocks[i][0] = 1<<10;
 276             }
 277         }else
 278             blocks_per_mb = 4;//Luminance blocks only
 279     }
 280     cbp = calc_cbp(s,blocks_per_mb);
 281     mv_block->coded_block_pattern = cbp;
 282     if(cbp == 0)
 283         mv_block->macroblock_type &= ~XVMC_MB_TYPE_PATTERN;
 284
 285     for(i=0; i<blocks_per_mb; i++){
 286         if(s->block_last_index[i] >= 0){
 287             // i do not have unsigned_intra MOCO to test, hope it is OK
 288             if( (s->mb_intra) && ( render->idct || (!render->idct && !render->unsigned_intra)) )
 289                 s->pblocks[i][0]-=1<<10;
 290             if(!render->idct){
 291                 s->dsp.idct(s->pblocks[i]);
 292                 //!!TODO!clip!!!
 293             }
 294 //copy blocks only if the codec doesn't support pblocks reordering
 295             if(s->avctx->xvmc_acceleration == 1){
 296                 memcpy(&render->data_blocks[(render->next_free_data_block_num)*64],
 297                         s->pblocks[i],sizeof(short)*8*8);
 298             }else{
 299 /*              if(s->pblocks[i] != &render->data_blocks[
 300                         (render->next_free_data_block_num)*64]){
 301                    printf("ERROR mb(%d,%d) s->pblocks[i]=%p data_block[]=%p\n",
 302                    s->mb_x,s->mb_y, s->pblocks[i],
 303                    &render->data_blocks[(render->next_free_data_block_num)*64]);
 304                 }*/
 305             }
 306             render->next_free_data_block_num++;
 307         }
 308     }
 309     render->filled_mv_blocks_num++;
 310
 311     assert(render->filled_mv_blocks_num <= render->total_number_of_mv_blocks);
 312     assert(render->next_free_data_block_num <= render->total_number_of_data_blocks);
 313
 314
 315     if(render->filled_mv_blocks_num >= render->total_number_of_mv_blocks)
 316         ff_draw_horiz_band(s,0,0);
 317
 318 // DumpRenderInfo(render);
 319 // DumpMBlockInfo(mv_block);
 320
 321 }
 322
 323 #endif