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