git.sesse.net Git - ffmpeg/blob - libavcodec/xvmcvideo.c

   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 static int calc_cbp(MpegEncContext *s, int blocknum){
  45 /* compute cbp */
  46 // for I420 bit_offset=5
  47 int  i,cbp = 0;
  48     for(i=0; i<blocknum; i++) {
  49         if(s->block_last_index[i] >= 0)
  50             cbp |= 1 << (5 - i);
  51     }
  52     return cbp;
  53 }
  54
  55
  56
  57 //these functions should be called on every new field or/and frame
  58 //They should be safe if they are called few times for same field!
  59 int XVMC_field_start(MpegEncContext*s, AVCodecContext *avctx){
  60 xvmc_render_state_t * render,* last, * next;
  61
  62     assert(avctx != NULL);
  63
  64     render = (xvmc_render_state_t*)s->current_picture.data[2];
  65     assert(render != NULL);
  66     if( (render == NULL) || (render->magic != MP_XVMC_RENDER_MAGIC) )
  67         return -1;//make sure that this is render packet
  68
  69     render->picture_structure = s->picture_structure;
  70     render->flags = (s->first_field)? 0: XVMC_SECOND_FIELD;
  71
  72 //make sure that all data is drawn by XVMC_end_frame
  73     assert(render->filled_mv_blocks_num==0);
  74
  75     render->p_future_surface = NULL;
  76     render->p_past_surface = NULL;
  77
  78     switch(s->pict_type){
  79         case  I_TYPE:
  80             return 0;// no prediction from other frames
  81         case  B_TYPE:
  82             next = (xvmc_render_state_t*)s->next_picture.data[2];
  83             assert(next!=NULL);
  84             assert(next->state & MP_XVMC_STATE_PREDICTION);
  85             if(next == NULL) return -1;
  86             if(next->magic != MP_XVMC_RENDER_MAGIC) return -1;
  87             render->p_future_surface = next->p_surface;
  88             //no return here, going to set forward prediction
  89         case  P_TYPE:
  90             last = (xvmc_render_state_t*)s->last_picture.data[2];
  91             if(last == NULL)// && !s->first_field)
  92                 last = render;//predict second field from the first
  93             if(last->magic != MP_XVMC_RENDER_MAGIC) return -1;
  94             assert(last->state & MP_XVMC_STATE_PREDICTION);
  95             render->p_past_surface = last->p_surface;
  96             return 0;
  97      }
  98
  99 return -1;
 100 }
 101
 102 void XVMC_field_end(MpegEncContext *s){
 103 xvmc_render_state_t * render;
 104     render = (xvmc_render_state_t*)s->current_picture.data[2];
 105     assert(render != NULL);
 106
 107     if(render->filled_mv_blocks_num > 0){
 108 //        printf("xvmcvideo.c: rendering %d left blocks after last slice!!!\n",render->filled_mv_blocks_num );
 109         ff_draw_horiz_band(s,0,0);
 110     }
 111 }
 112
 113 void XVMC_decode_mb(MpegEncContext *s, DCTELEM block[6][64]){
 114 XvMCMacroBlock * mv_block;
 115 xvmc_render_state_t * render;
 116 int i,cbp,blocks_per_mb;
 117
 118 const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
 119
 120
 121     if(s->encoding){
 122         fprintf(stderr,"XVMC doesn't support encoding!!!\n");
 123         av_abort();
 124     }
 125
 126    //from MPV_decode_mb(),
 127     /* update DC predictors for P macroblocks */
 128     if (!s->mb_intra) {
 129         s->last_dc[0] =
 130         s->last_dc[1] =
 131         s->last_dc[2] =  128 << s->intra_dc_precision;
 132     }
 133
 134    //MC doesn't skip blocks
 135     s->mb_skiped = 0;
 136
 137
 138    // do I need to export quant when I could not perform postprocessing?
 139    // anyway, it doesn't hurrt
 140     s->current_picture.qscale_table[mb_xy] = s->qscale;
 141
 142 //START OF XVMC specific code
 143     render = (xvmc_render_state_t*)s->current_picture.data[2];
 144     assert(render!=NULL);
 145     assert(render->magic==MP_XVMC_RENDER_MAGIC);
 146     assert(render->mv_blocks);
 147
 148     //take the next free macroblock
 149     mv_block = &render->mv_blocks[render->start_mv_blocks_num +
 150                                    render->filled_mv_blocks_num ];
 151
 152 // memset(mv_block,0,sizeof(XvMCMacroBlock));
 153
 154     mv_block->x = s->mb_x;
 155     mv_block->y = s->mb_y;
 156     mv_block->dct_type = s->interlaced_dct;//XVMC_DCT_TYPE_FRAME/FIELD;
 157 //    mv_block->motion_type = 0;  //zero to silense warnings
 158     if(s->mb_intra){
 159         mv_block->macroblock_type = XVMC_MB_TYPE_INTRA;//no MC, all done
 160     }else{
 161         mv_block->macroblock_type = XVMC_MB_TYPE_PATTERN;
 162
 163         if(s->mv_dir & MV_DIR_FORWARD){
 164             mv_block->macroblock_type|= XVMC_MB_TYPE_MOTION_FORWARD;
 165             //pmv[n][dir][xy]=mv[dir][n][xy]
 166             mv_block->PMV[0][0][0] = s->mv[0][0][0];
 167             mv_block->PMV[0][0][1] = s->mv[0][0][1];
 168             mv_block->PMV[1][0][0] = s->mv[0][1][0];
 169             mv_block->PMV[1][0][1] = s->mv[0][1][1];
 170         }
 171         if(s->mv_dir & MV_DIR_BACKWARD){
 172             mv_block->macroblock_type|=XVMC_MB_TYPE_MOTION_BACKWARD;
 173             mv_block->PMV[0][1][0] = s->mv[1][0][0];
 174             mv_block->PMV[0][1][1] = s->mv[1][0][1];
 175             mv_block->PMV[1][1][0] = s->mv[1][1][0];
 176             mv_block->PMV[1][1][1] = s->mv[1][1][1];
 177         }
 178
 179         switch(s->mv_type){
 180             case  MV_TYPE_16X16:
 181                 mv_block->motion_type = XVMC_PREDICTION_FRAME;
 182                 break;
 183             case  MV_TYPE_16X8:
 184                 mv_block->motion_type = XVMC_PREDICTION_16x8;
 185                 break;
 186             case  MV_TYPE_FIELD:
 187                 mv_block->motion_type = XVMC_PREDICTION_FIELD;
 188                 if(s->picture_structure == PICT_FRAME){
 189                     mv_block->PMV[0][0][1]<<=1;
 190                     mv_block->PMV[1][0][1]<<=1;
 191                     mv_block->PMV[0][1][1]<<=1;
 192                     mv_block->PMV[1][1][1]<<=1;
 193                 }
 194                 break;
 195             case  MV_TYPE_DMV:
 196                 mv_block->motion_type = XVMC_PREDICTION_DUAL_PRIME;
 197                 if(s->picture_structure == PICT_FRAME){
 198
 199                     mv_block->PMV[0][0][0] = s->mv[0][0][0];//top from top
 200                     mv_block->PMV[0][0][1] = s->mv[0][0][1]<<1;
 201
 202                     mv_block->PMV[0][1][0] = s->mv[0][0][0];//bottom from bottom
 203                     mv_block->PMV[0][1][1] = s->mv[0][0][1]<<1;
 204
 205                     mv_block->PMV[1][0][0] = s->mv[0][2][0];//dmv00, top from bottom
 206                     mv_block->PMV[1][0][1] = s->mv[0][2][1]<<1;//dmv01
 207
 208                     mv_block->PMV[1][1][0] = s->mv[0][3][0];//dmv10, bottom from top
 209                     mv_block->PMV[1][1][1] = s->mv[0][3][1]<<1;//dmv11
 210
 211                 }else{
 212                     mv_block->PMV[0][1][0] = s->mv[0][2][0];//dmv00
 213                     mv_block->PMV[0][1][1] = s->mv[0][2][1];//dmv01
 214                 }
 215                 break;
 216             default:
 217                 assert(0);
 218         }
 219
 220         mv_block->motion_vertical_field_select = 0;
 221
 222 //set correct field referenses
 223         if(s->mv_type == MV_TYPE_FIELD || s->mv_type == MV_TYPE_16X8){
 224             if( s->field_select[0][0] ) mv_block->motion_vertical_field_select|=1;
 225             if( s->field_select[1][0] ) mv_block->motion_vertical_field_select|=2;
 226             if( s->field_select[0][1] ) mv_block->motion_vertical_field_select|=4;
 227             if( s->field_select[1][1] ) mv_block->motion_vertical_field_select|=8;
 228         }
 229     }//!intra
 230 //time to handle data blocks;
 231     mv_block->index = render->next_free_data_block_num;
 232     blocks_per_mb = 6;
 233 /*
 234     switch( s->chroma_format){
 235         case CHROMA_422:
 236             blocks_per_mb = 8;
 237             break;
 238         case CHROMA_444:
 239             blocks_per_mb = 12;
 240             break;
 241     }
 242 */
 243     if(s->flags & CODEC_FLAG_GRAY){
 244         if(s->mb_intra){//intra frames are alwasy full chroma block
 245             memset(block[4],0,sizeof(short)*8*8);//so we need to clear them
 246             memset(block[5],0,sizeof(short)*8*8);
 247             if(!render->unsigned_intra)
 248                 block[4][0] = block[5][0] = 1<<10;
 249         }
 250         else
 251             blocks_per_mb = 4;//Luminance blocks only
 252     };
 253     cbp = calc_cbp(s,blocks_per_mb);
 254     mv_block->coded_block_pattern = cbp;
 255     if(cbp == 0)
 256         mv_block->macroblock_type &= ~XVMC_MB_TYPE_PATTERN;
 257
 258     for(i=0; i<blocks_per_mb; i++){
 259         if(s->block_last_index[i] >= 0){
 260             // i do not have unsigned_intra MOCO to test, hope it is OK
 261             if( (s->mb_intra) && ( render->idct || (!render->idct && !render->unsigned_intra)) )
 262                 block[i][0]-=1<<10;
 263             if(!render->idct){
 264                 s->dsp.idct(block[i]);
 265                 //!!TODO!clip!!!
 266             }
 267 //TODO:avoid block copy by modifying s->block pointer
 268             memcpy(&render->data_blocks[(render->next_free_data_block_num++)*64],
 269                     block[i],sizeof(short)*8*8);
 270         }
 271     }
 272     render->filled_mv_blocks_num++;
 273
 274     assert(render->filled_mv_blocks_num <= render->total_number_of_mv_blocks);
 275     assert(render->next_free_data_block_num <= render->total_number_of_data_blocks);
 276
 277
 278     if(render->filled_mv_blocks_num >= render->total_number_of_mv_blocks)
 279         ff_draw_horiz_band(s,0,0);
 280
 281 // DumpRenderInfo(render);
 282 // DumpMBlockInfo(mv_block);
 283
 284 }
 285
 286 #endif