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