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ffmpeg/libavcodec/xvmcvideo.c
Ivan Kalvachev 715731a32b better cbp handling and small speedup in mpeg12 
Originally committed as revision 3219 to svn://svn.ffmpeg.org/ffmpeg/trunk
2004-06-12 16:51:15 +00:00

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/*
* XVideo Motion Compensation
* Copyright (c) 2003 Ivan Kalvachev
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <limits.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
//X11 includes are in the xvmc_render.h
//by replacing it with none-X one
//XvMC emulation could be performed
#include "xvmc_render.h"
//#include "xvmc_debug.h"
//set s->block
inline void XVMC_init_block(MpegEncContext *s){
xvmc_render_state_t * render;
render = (xvmc_render_state_t*)s->current_picture.data[2];
assert(render != NULL);
if( (render == NULL) || (render->magic != MP_XVMC_RENDER_MAGIC) ){
assert(0);
return;//make sure that this is render packet
}
s->block =(DCTELEM *)(render->data_blocks+(render->next_free_data_block_num)*64);
}
void XVMC_pack_pblocks(MpegEncContext *s, int cbp){
int i,j;
const int mb_block_count = 4+(1<<s->chroma_format);
j=0;
cbp<<= 12-mb_block_count;
for(i=0; i<mb_block_count; i++){
if(cbp & (1<<11)) {
s->pblocks[i] = (short *)(&s->block[(j++)]);
}else{
s->pblocks[i] = NULL;
}
cbp+=cbp;
// printf("s->pblocks[%d]=%p ,s->block=%p cbp=%d\n",i,s->pblocks[i],s->block,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);
if( (render == NULL) || (render->magic != MP_XVMC_RENDER_MAGIC) )
return -1;//make sure that this is render packet
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);
if(next == NULL) return -1;
if(next->magic != MP_XVMC_RENDER_MAGIC) return -1;
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
if(last->magic != MP_XVMC_RENDER_MAGIC) return -1;
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){
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){
av_log(s->avctx, AV_LOG_ERROR, "XVMC doesn't support encoding!!!\n");
av_abort();
}
//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;
if( s->chroma_format >= 2){
blocks_per_mb = 4 + (1 << (s->chroma_format));
}
// calculate cbp
cbp = 0;
for(i=0; i<blocks_per_mb; i++) {
cbp+= cbp;
if(s->block_last_index[i] >= 0)
cbp++;
}
if(s->flags & CODEC_FLAG_GRAY){
if(s->mb_intra){//intra frames are alwasy full chroma block
for(i=4; i<blocks_per_mb; i++){
memset(s->pblocks[i],0,sizeof(short)*8*8);//so we need to clear them
if(!render->unsigned_intra)
s->pblocks[i][0] = 1<<10;
}
}else{
cbp&= 0xf << (blocks_per_mb - 4);
blocks_per_mb = 4;//Luminance blocks only
}
}
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)) )
s->pblocks[i][0]-=1<<10;
if(!render->idct){
s->dsp.idct(s->pblocks[i]);
//!!TODO!clip!!!
}
//copy blocks only if the codec doesn't support pblocks reordering
if(s->avctx->xvmc_acceleration == 1){
memcpy(&render->data_blocks[(render->next_free_data_block_num)*64],
s->pblocks[i],sizeof(short)*8*8);
}else{
/* if(s->pblocks[i] != &render->data_blocks[
(render->next_free_data_block_num)*64]){
printf("ERROR mb(%d,%d) s->pblocks[i]=%p data_block[]=%p\n",
s->mb_x,s->mb_y, s->pblocks[i],
&render->data_blocks[(render->next_free_data_block_num)*64]);
}*/
}
render->next_free_data_block_num++;
}
}
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
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