initial XvMC support

Originally committed as revision 2085 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 267 insertions, 0 deletions

diff --git a/libavcodec/xvmcvideo.c b/libavcodec/xvmcvideo.c
new file mode 100644
index 0000000000..d6aaee4541
--- /dev/null
+++ b/libavcodec/xvmcvideo.c
@@ -0,0 +1,267 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <limits.h>
+
+//X11 include
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/Xatom.h>
+#include <X11/extensions/Xv.h>
+#include <X11/extensions/Xvlib.h>
+#include <X11/extensions/XvMClib.h>
+
+#include "xvmc_render.h"
+
+//avcodec include
+#include "avcodec.h"
+#include "dsputil.h"
+#include "mpegvideo.h"
+
+#undef NDEBUG
+#include <assert.h>
+
+#ifdef USE_FASTMEMCPY
+#include "fastmemcpy.h"
+#endif
+
+#ifdef HAVE_XVMC
+//#include "xvmc_debug.h"
+
+static int calc_cbp(MpegEncContext *s, int blocknum){
+/* compute cbp */
+// for I420 bit_offset=5
+int  i,cbp = 0;
+    for(i=0; i<blocknum; i++) {
+        if(s->block_last_index[i] >= 0)
+            cbp |= 1 << (5 - i);
+    }
+    return cbp;
+}
+
+
+
+//these functions should be called on every new field or/and frame
+//They should be safe if they are called few times for same field!
+int XVMC_field_start(MpegEncContext*s, AVCodecContext *avctx){
+xvmc_render_state_t * render,* last, * next;
+
+    assert(avctx != NULL);
+    render = (xvmc_render_state_t*)s->current_picture.data[2];
+    assert(render != NULL);
+
+    render->picture_structure = s->picture_structure;
+    render->flags = (s->first_field)? 0: XVMC_SECOND_FIELD;
+
+//make sure that all data is drawn by XVMC_end_frame
+    assert(render->filled_mv_blocks_num==0);
+
+    render->p_future_surface = NULL;
+    render->p_past_surface = NULL;
+
+    switch(s->pict_type){
+        case  I_TYPE:
+            return 0;// no prediction from other frames
+        case  B_TYPE:
+            next = (xvmc_render_state_t*)s->next_picture.data[2];
+            assert(next!=NULL);
+            assert(next->state & MP_XVMC_STATE_PREDICTION);
+            render->p_future_surface = next->p_surface;
+            //no return here, going to set forward prediction
+        case  P_TYPE:
+            last = (xvmc_render_state_t*)s->last_picture.data[2];
+            if(last == NULL)// && !s->first_field)
+                last = render;//predict second field from the first
+            assert(last->state & MP_XVMC_STATE_PREDICTION);
+            render->p_past_surface = last->p_surface;
+            return 0;
+     }
+
+return -1;
+}
+
+void XVMC_field_end(MpegEncContext *s){
+xvmc_render_state_t * render;
+    render = (xvmc_render_state_t*)s->current_picture.data[2];
+    assert(render != NULL);
+
+    if(render->filled_mv_blocks_num > 0){
+//        printf("xvmcvideo.c: rendering %d left blocks after last slice!!!\n",render->filled_mv_blocks_num );
+        ff_draw_horiz_band(s,0,0);
+    }
+}
+
+void XVMC_decode_mb(MpegEncContext *s, DCTELEM block[6][64]){
+XvMCMacroBlock * mv_block;
+xvmc_render_state_t * render;
+int i,cbp,blocks_per_mb;
+
+const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
+
+
+    if(s->encoding){
+        fprintf(stderr,"XVMC doesn't support encoding!!!\n");
+        assert(0);
+        return;
+    }
+
+   //from MPV_decode_mb(),
+    /* update DC predictors for P macroblocks */
+    if (!s->mb_intra) {
+        s->last_dc[0] =
+        s->last_dc[1] =
+        s->last_dc[2] =  128 << s->intra_dc_precision;
+    }
+
+   //MC doesn't skip blocks
+    s->mb_skiped = 0;
+
+
+   // do I need to export quant when I could not perform postprocessing?
+   // anyway, it doesn't hurrt
+    s->current_picture.qscale_table[mb_xy] = s->qscale;
+
+//START OF XVMC specific code
+    render = (xvmc_render_state_t*)s->current_picture.data[2];
+    assert(render!=NULL);
+    assert(render->magic==MP_XVMC_RENDER_MAGIC);
+    assert(render->mv_blocks);
+    //take the next free macroblock
+    mv_block = &render->mv_blocks[render->start_mv_blocks_num + 
+                                   render->filled_mv_blocks_num ];
+
+// memset(mv_block,0,sizeof(XvMCMacroBlock));
+
+    mv_block->x = s->mb_x;
+    mv_block->y = s->mb_y;
+    mv_block->dct_type = s->interlaced_dct;//XVMC_DCT_TYPE_FRAME/FIELD;
+//    mv_block->motion_type = 0;  //zero to silense warnings
+    if(s->mb_intra){
+        mv_block->macroblock_type = XVMC_MB_TYPE_INTRA;//no MC, all done
+    }else{
+        mv_block->macroblock_type = XVMC_MB_TYPE_PATTERN;
+
+        if(s->mv_dir & MV_DIR_FORWARD){
+            mv_block->macroblock_type|= XVMC_MB_TYPE_MOTION_FORWARD;
+            //pmv[n][dir][xy]=mv[dir][n][xy]
+            mv_block->PMV[0][0][0] = s->mv[0][0][0];
+            mv_block->PMV[0][0][1] = s->mv[0][0][1];
+            mv_block->PMV[1][0][0] = s->mv[0][1][0];
+            mv_block->PMV[1][0][1] = s->mv[0][1][1];
+        }
+        if(s->mv_dir & MV_DIR_BACKWARD){
+            mv_block->macroblock_type|=XVMC_MB_TYPE_MOTION_BACKWARD;
+            mv_block->PMV[0][1][0] = s->mv[1][0][0];
+            mv_block->PMV[0][1][1] = s->mv[1][0][1];
+            mv_block->PMV[1][1][0] = s->mv[1][1][0];
+            mv_block->PMV[1][1][1] = s->mv[1][1][1];
+        }
+
+        switch(s->mv_type){
+            case  MV_TYPE_16X16:
+                mv_block->motion_type = XVMC_PREDICTION_FRAME;
+                break;
+            case  MV_TYPE_16X8:
+                mv_block->motion_type = XVMC_PREDICTION_16x8;
+                break;
+            case  MV_TYPE_FIELD:
+                mv_block->motion_type = XVMC_PREDICTION_FIELD;
+                if(s->picture_structure == PICT_FRAME){
+                    mv_block->PMV[0][0][1]<<=1;
+                    mv_block->PMV[1][0][1]<<=1;
+                    mv_block->PMV[0][1][1]<<=1;
+                    mv_block->PMV[1][1][1]<<=1;
+                }
+                break;
+            case  MV_TYPE_DMV:
+                mv_block->motion_type = XVMC_PREDICTION_DUAL_PRIME;
+                if(s->picture_structure == PICT_FRAME){
+
+                    mv_block->PMV[0][0][0] = s->mv[0][0][0];//top from top
+                    mv_block->PMV[0][0][1] = s->mv[0][0][1]<<1;
+
+                    mv_block->PMV[0][1][0] = s->mv[0][0][0];//bottom from bottom
+                    mv_block->PMV[0][1][1] = s->mv[0][0][1]<<1;
+
+                    mv_block->PMV[1][0][0] = s->mv[0][2][0];//dmv00, top from bottom
+                    mv_block->PMV[1][0][1] = s->mv[0][2][1]<<1;//dmv01
+
+                    mv_block->PMV[1][1][0] = s->mv[0][3][0];//dmv10, bottom from top
+                    mv_block->PMV[1][1][1] = s->mv[0][3][1]<<1;//dmv11
+
+                }else{
+                    mv_block->PMV[0][1][0] = s->mv[0][2][0];//dmv00
+                    mv_block->PMV[0][1][1] = s->mv[0][2][1];//dmv01
+                }
+                break;
+            default:
+                assert(0);
+        }
+
+        mv_block->motion_vertical_field_select = 0;
+
+//set correct field referenses
+        if(s->mv_type == MV_TYPE_FIELD || s->mv_type == MV_TYPE_16X8){
+            if( s->field_select[0][0] ) mv_block->motion_vertical_field_select|=1;
+            if( s->field_select[1][0] ) mv_block->motion_vertical_field_select|=2;
+            if( s->field_select[0][1] ) mv_block->motion_vertical_field_select|=4;
+            if( s->field_select[1][1] ) mv_block->motion_vertical_field_select|=8;
+        }
+    }//!intra
+//time to handle data blocks;
+    mv_block->index = render->next_free_data_block_num;
+    blocks_per_mb = 6;
+/*
+    switch( s->chroma_format){
+        case CHROMA_422:
+            blocks_per_mb = 8;
+            break;
+        case CHROMA_444:
+            blocks_per_mb = 12;
+            break;
+    }
+*/
+    if(s->flags & CODEC_FLAG_GRAY){
+        if(s->mb_intra){//intra frames are alwasy full chroma block
+            memset(block[4],0,sizeof(short)*8*8);//so we need to clear them
+            memset(block[5],0,sizeof(short)*8*8);
+            if(!render->unsigned_intra)
+                block[4][0] = block[5][0] = 1<<10;
+        }
+        else
+            blocks_per_mb = 4;//Luminance blocks only
+    };
+    cbp = calc_cbp(s,blocks_per_mb);
+    mv_block->coded_block_pattern = cbp;
+    if(cbp == 0)
+        mv_block->macroblock_type &= ~XVMC_MB_TYPE_PATTERN;
+
+    for(i=0; i<blocks_per_mb; i++){
+        if(s->block_last_index[i] >= 0){
+            // i do not have unsigned_intra MOCO to test, hope it is OK
+            if( (s->mb_intra) && ( render->idct || (!render->idct && !render->unsigned_intra)) )
+                block[i][0]-=1<<10;
+            if(!render->idct){
+                s->dsp.idct(block[i]);
+                //!!TODO!clip!!!
+            }
+//TODO:avoid block copy by modifying s->block pointer
+            memcpy(&render->data_blocks[(render->next_free_data_block_num++)*64],
+                    block[i],sizeof(short)*8*8);
+        }
+    }
+    render->filled_mv_blocks_num++;
+
+    assert(render->filled_mv_blocks_num <= render->total_number_of_mv_blocks);
+    assert(render->next_free_data_block_num <= render->total_number_of_data_blocks);
+
+
+    if(render->filled_mv_blocks_num >= render->total_number_of_mv_blocks)
+        ff_draw_horiz_band(s,0,0);
+
+// DumpRenderInfo(render);
+// DumpMBlockInfo(mv_block);
+
+}
+
+#endif