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ffmpeg / libavcodec / xvmcvideo.c @ 186447f8

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1 302898fc Ivan Kalvachev
/*
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 * XVideo Motion Compensation
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 * Copyright (c) 2003 Ivan Kalvachev
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 */
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#include <limits.h>
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//avcodec include
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#include "avcodec.h"
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#include "dsputil.h"
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#include "mpegvideo.h"
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#undef NDEBUG
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#include <assert.h>
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#ifdef USE_FASTMEMCPY
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#include "fastmemcpy.h"
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#endif
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#ifdef HAVE_XVMC
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//X11 includes are in the xvmc_render.h
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//by replacing it with none-X one
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//XvMC emulation could be performed
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#include "xvmc_render.h"
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//#include "xvmc_debug.h"
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static int calc_cbp(MpegEncContext *s, int blocknum){
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/* compute cbp */
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// for I420 bit_offset=5
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int  i,cbp = 0;
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    for(i=0; i<blocknum; i++) {
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        if(s->block_last_index[i] >= 0)
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            cbp |= 1 << (5 - i);
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    }
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    return cbp;
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}
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//these functions should be called on every new field or/and frame
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//They should be safe if they are called few times for same field!
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int XVMC_field_start(MpegEncContext*s, AVCodecContext *avctx){
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xvmc_render_state_t * render,* last, * next;
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    assert(avctx != NULL);
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    render = (xvmc_render_state_t*)s->current_picture.data[2];
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    assert(render != NULL);
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    if( (render == NULL) || (render->magic != MP_XVMC_RENDER_MAGIC) )
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        return -1;//make sure that this is render packet
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    render->picture_structure = s->picture_structure;
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    render->flags = (s->first_field)? 0: XVMC_SECOND_FIELD;
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//make sure that all data is drawn by XVMC_end_frame
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    assert(render->filled_mv_blocks_num==0);
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    render->p_future_surface = NULL;
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    render->p_past_surface = NULL;
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    switch(s->pict_type){
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        case  I_TYPE:
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            return 0;// no prediction from other frames
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        case  B_TYPE:
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            next = (xvmc_render_state_t*)s->next_picture.data[2];
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            assert(next!=NULL);
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            assert(next->state & MP_XVMC_STATE_PREDICTION);
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            if(next == NULL) return -1;
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            if(next->magic != MP_XVMC_RENDER_MAGIC) return -1;
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            render->p_future_surface = next->p_surface;
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            //no return here, going to set forward prediction
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        case  P_TYPE:
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            last = (xvmc_render_state_t*)s->last_picture.data[2];
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            if(last == NULL)// && !s->first_field)
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                last = render;//predict second field from the first
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            if(last->magic != MP_XVMC_RENDER_MAGIC) return -1;
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            assert(last->state & MP_XVMC_STATE_PREDICTION);
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            render->p_past_surface = last->p_surface;
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            return 0;
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     }
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return -1;
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}
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void XVMC_field_end(MpegEncContext *s){
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xvmc_render_state_t * render;
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    render = (xvmc_render_state_t*)s->current_picture.data[2];
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    assert(render != NULL);
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    if(render->filled_mv_blocks_num > 0){
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//        printf("xvmcvideo.c: rendering %d left blocks after last slice!!!\n",render->filled_mv_blocks_num );
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        ff_draw_horiz_band(s,0,0);
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    }
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}
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void XVMC_decode_mb(MpegEncContext *s, DCTELEM block[6][64]){
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XvMCMacroBlock * mv_block;
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xvmc_render_state_t * render;
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int i,cbp,blocks_per_mb;
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const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
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    if(s->encoding){
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        fprintf(stderr,"XVMC doesn't support encoding!!!\n");
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        assert(0);
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        return;
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    }
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   //from MPV_decode_mb(),
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    /* update DC predictors for P macroblocks */
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    if (!s->mb_intra) {
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        s->last_dc[0] =
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        s->last_dc[1] =
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        s->last_dc[2] =  128 << s->intra_dc_precision;
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    }
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   //MC doesn't skip blocks
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    s->mb_skiped = 0;
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   // do I need to export quant when I could not perform postprocessing?
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   // anyway, it doesn't hurrt
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    s->current_picture.qscale_table[mb_xy] = s->qscale;
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//START OF XVMC specific code
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    render = (xvmc_render_state_t*)s->current_picture.data[2];
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    assert(render!=NULL);
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    assert(render->magic==MP_XVMC_RENDER_MAGIC);
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    assert(render->mv_blocks);
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    //take the next free macroblock
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    mv_block = &render->mv_blocks[render->start_mv_blocks_num + 
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                                   render->filled_mv_blocks_num ];
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// memset(mv_block,0,sizeof(XvMCMacroBlock));
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    mv_block->x = s->mb_x;
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    mv_block->y = s->mb_y;
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    mv_block->dct_type = s->interlaced_dct;//XVMC_DCT_TYPE_FRAME/FIELD;
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//    mv_block->motion_type = 0;  //zero to silense warnings
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    if(s->mb_intra){
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        mv_block->macroblock_type = XVMC_MB_TYPE_INTRA;//no MC, all done
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    }else{
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        mv_block->macroblock_type = XVMC_MB_TYPE_PATTERN;
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        if(s->mv_dir & MV_DIR_FORWARD){
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            mv_block->macroblock_type|= XVMC_MB_TYPE_MOTION_FORWARD;
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            //pmv[n][dir][xy]=mv[dir][n][xy]
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            mv_block->PMV[0][0][0] = s->mv[0][0][0];
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            mv_block->PMV[0][0][1] = s->mv[0][0][1];
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            mv_block->PMV[1][0][0] = s->mv[0][1][0];
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            mv_block->PMV[1][0][1] = s->mv[0][1][1];
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        }
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        if(s->mv_dir & MV_DIR_BACKWARD){
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            mv_block->macroblock_type|=XVMC_MB_TYPE_MOTION_BACKWARD;
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            mv_block->PMV[0][1][0] = s->mv[1][0][0];
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            mv_block->PMV[0][1][1] = s->mv[1][0][1];
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            mv_block->PMV[1][1][0] = s->mv[1][1][0];
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            mv_block->PMV[1][1][1] = s->mv[1][1][1];
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        }
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        switch(s->mv_type){
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            case  MV_TYPE_16X16:
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                mv_block->motion_type = XVMC_PREDICTION_FRAME;
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                break;
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            case  MV_TYPE_16X8:
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                mv_block->motion_type = XVMC_PREDICTION_16x8;
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                break;
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            case  MV_TYPE_FIELD:
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                mv_block->motion_type = XVMC_PREDICTION_FIELD;
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                if(s->picture_structure == PICT_FRAME){
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                    mv_block->PMV[0][0][1]<<=1;
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                    mv_block->PMV[1][0][1]<<=1;
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                    mv_block->PMV[0][1][1]<<=1;
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                    mv_block->PMV[1][1][1]<<=1;
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                }
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                break;
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            case  MV_TYPE_DMV:
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                mv_block->motion_type = XVMC_PREDICTION_DUAL_PRIME;
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                if(s->picture_structure == PICT_FRAME){
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                    mv_block->PMV[0][0][0] = s->mv[0][0][0];//top from top
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                    mv_block->PMV[0][0][1] = s->mv[0][0][1]<<1;
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                    mv_block->PMV[0][1][0] = s->mv[0][0][0];//bottom from bottom
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                    mv_block->PMV[0][1][1] = s->mv[0][0][1]<<1;
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                    mv_block->PMV[1][0][0] = s->mv[0][2][0];//dmv00, top from bottom
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                    mv_block->PMV[1][0][1] = s->mv[0][2][1]<<1;//dmv01
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                    mv_block->PMV[1][1][0] = s->mv[0][3][0];//dmv10, bottom from top
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                    mv_block->PMV[1][1][1] = s->mv[0][3][1]<<1;//dmv11
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                }else{
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                    mv_block->PMV[0][1][0] = s->mv[0][2][0];//dmv00
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                    mv_block->PMV[0][1][1] = s->mv[0][2][1];//dmv01
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                }
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                break;
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            default:
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                assert(0);
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        }
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        mv_block->motion_vertical_field_select = 0;
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//set correct field referenses
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        if(s->mv_type == MV_TYPE_FIELD || s->mv_type == MV_TYPE_16X8){
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            if( s->field_select[0][0] ) mv_block->motion_vertical_field_select|=1;
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            if( s->field_select[1][0] ) mv_block->motion_vertical_field_select|=2;
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            if( s->field_select[0][1] ) mv_block->motion_vertical_field_select|=4;
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            if( s->field_select[1][1] ) mv_block->motion_vertical_field_select|=8;
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        }
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    }//!intra
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//time to handle data blocks;
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    mv_block->index = render->next_free_data_block_num;
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    blocks_per_mb = 6;
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/*
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    switch( s->chroma_format){
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        case CHROMA_422:
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            blocks_per_mb = 8;
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            break;
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        case CHROMA_444:
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            blocks_per_mb = 12;
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            break;
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    }
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*/
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    if(s->flags & CODEC_FLAG_GRAY){
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        if(s->mb_intra){//intra frames are alwasy full chroma block
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            memset(block[4],0,sizeof(short)*8*8);//so we need to clear them
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            memset(block[5],0,sizeof(short)*8*8);
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            if(!render->unsigned_intra)
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                block[4][0] = block[5][0] = 1<<10;
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        }
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        else
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            blocks_per_mb = 4;//Luminance blocks only
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    };
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    cbp = calc_cbp(s,blocks_per_mb);
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    mv_block->coded_block_pattern = cbp;
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    if(cbp == 0)
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        mv_block->macroblock_type &= ~XVMC_MB_TYPE_PATTERN;
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    for(i=0; i<blocks_per_mb; i++){
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        if(s->block_last_index[i] >= 0){
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            // i do not have unsigned_intra MOCO to test, hope it is OK
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            if( (s->mb_intra) && ( render->idct || (!render->idct && !render->unsigned_intra)) )
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                block[i][0]-=1<<10;
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            if(!render->idct){
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                s->dsp.idct(block[i]);
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                //!!TODO!clip!!!
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            }
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//TODO:avoid block copy by modifying s->block pointer
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            memcpy(&render->data_blocks[(render->next_free_data_block_num++)*64],
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                    block[i],sizeof(short)*8*8);
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        }
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    }
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    render->filled_mv_blocks_num++;
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    assert(render->filled_mv_blocks_num <= render->total_number_of_mv_blocks);
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    assert(render->next_free_data_block_num <= render->total_number_of_data_blocks);
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    if(render->filled_mv_blocks_num >= render->total_number_of_mv_blocks)
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        ff_draw_horiz_band(s,0,0);
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// DumpRenderInfo(render);
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// DumpMBlockInfo(mv_block);
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}
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#endif