Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

756 lines (683 sloc) 27.31 kb
/*
* Chinese AVS video (AVS1-P2, JiZhun profile) decoder.
* Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de>
*
* This file is part of FFmpeg.
*
* FFmpeg 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 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Chinese AVS video (AVS1-P2, JiZhun profile) decoder
* @author Stefan Gehrer <stefan.gehrer@gmx.de>
*/
#include "avcodec.h"
#include "get_bits.h"
#include "golomb.h"
#include "mathops.h"
#include "cavs.h"
static const uint8_t alpha_tab[64] = {
0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 3, 3,
4, 4, 5, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 18, 20,
22, 24, 26, 28, 30, 33, 33, 35, 35, 36, 37, 37, 39, 39, 42, 44,
46, 48, 50, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64
};
static const uint8_t beta_tab[64] = {
0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2,
2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6,
6, 7, 7, 7, 8, 8, 8, 9, 9, 10, 10, 11, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 23, 24, 24, 25, 25, 26, 27
};
static const uint8_t tc_tab[64] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2,
2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4,
5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9
};
/** mark block as unavailable, i.e. out of picture
or not yet decoded */
static const cavs_vector un_mv = { 0, 0, 1, NOT_AVAIL };
static const int8_t left_modifier_l[8] = { 0, -1, 6, -1, -1, 7, 6, 7 };
static const int8_t top_modifier_l[8] = { -1, 1, 5, -1, -1, 5, 7, 7 };
static const int8_t left_modifier_c[7] = { 5, -1, 2, -1, 6, 5, 6 };
static const int8_t top_modifier_c[7] = { 4, 1, -1, -1, 4, 6, 6 };
/*****************************************************************************
*
* in-loop deblocking filter
*
****************************************************************************/
static inline int get_bs(cavs_vector *mvP, cavs_vector *mvQ, int b) {
if((mvP->ref == REF_INTRA) || (mvQ->ref == REF_INTRA))
return 2;
if( (abs(mvP->x - mvQ->x) >= 4) || (abs(mvP->y - mvQ->y) >= 4) )
return 1;
if(b){
mvP += MV_BWD_OFFS;
mvQ += MV_BWD_OFFS;
if( (abs(mvP->x - mvQ->x) >= 4) || (abs(mvP->y - mvQ->y) >= 4) )
return 1;
}else{
if(mvP->ref != mvQ->ref)
return 1;
}
return 0;
}
#define SET_PARAMS \
alpha = alpha_tab[av_clip(qp_avg + h->alpha_offset,0,63)]; \
beta = beta_tab[av_clip(qp_avg + h->beta_offset, 0,63)]; \
tc = tc_tab[av_clip(qp_avg + h->alpha_offset,0,63)];
/**
* in-loop deblocking filter for a single macroblock
*
* boundary strength (bs) mapping:
*
* --4---5--
* 0 2 |
* | 6 | 7 |
* 1 3 |
* ---------
*
*/
void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type) {
uint8_t bs[8];
int qp_avg, alpha, beta, tc;
int i;
/* save un-deblocked lines */
h->topleft_border_y = h->top_border_y[h->mbx*16+15];
h->topleft_border_u = h->top_border_u[h->mbx*10+8];
h->topleft_border_v = h->top_border_v[h->mbx*10+8];
memcpy(&h->top_border_y[h->mbx*16], h->cy + 15* h->l_stride,16);
memcpy(&h->top_border_u[h->mbx*10+1], h->cu + 7* h->c_stride,8);
memcpy(&h->top_border_v[h->mbx*10+1], h->cv + 7* h->c_stride,8);
for(i=0;i<8;i++) {
h->left_border_y[i*2+1] = *(h->cy + 15 + (i*2+0)*h->l_stride);
h->left_border_y[i*2+2] = *(h->cy + 15 + (i*2+1)*h->l_stride);
h->left_border_u[i+1] = *(h->cu + 7 + i*h->c_stride);
h->left_border_v[i+1] = *(h->cv + 7 + i*h->c_stride);
}
if(!h->loop_filter_disable) {
/* determine bs */
if(mb_type == I_8X8)
memset(bs,2,8);
else{
memset(bs,0,8);
if(ff_cavs_partition_flags[mb_type] & SPLITV){
bs[2] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X1], mb_type > P_8X8);
bs[3] = get_bs(&h->mv[MV_FWD_X2], &h->mv[MV_FWD_X3], mb_type > P_8X8);
}
if(ff_cavs_partition_flags[mb_type] & SPLITH){
bs[6] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X2], mb_type > P_8X8);
bs[7] = get_bs(&h->mv[MV_FWD_X1], &h->mv[MV_FWD_X3], mb_type > P_8X8);
}
bs[0] = get_bs(&h->mv[MV_FWD_A1], &h->mv[MV_FWD_X0], mb_type > P_8X8);
bs[1] = get_bs(&h->mv[MV_FWD_A3], &h->mv[MV_FWD_X2], mb_type > P_8X8);
bs[4] = get_bs(&h->mv[MV_FWD_B2], &h->mv[MV_FWD_X0], mb_type > P_8X8);
bs[5] = get_bs(&h->mv[MV_FWD_B3], &h->mv[MV_FWD_X1], mb_type > P_8X8);
}
if(AV_RN64(bs)) {
if(h->flags & A_AVAIL) {
qp_avg = (h->qp + h->left_qp + 1) >> 1;
SET_PARAMS;
h->cdsp.cavs_filter_lv(h->cy,h->l_stride,alpha,beta,tc,bs[0],bs[1]);
h->cdsp.cavs_filter_cv(h->cu,h->c_stride,alpha,beta,tc,bs[0],bs[1]);
h->cdsp.cavs_filter_cv(h->cv,h->c_stride,alpha,beta,tc,bs[0],bs[1]);
}
qp_avg = h->qp;
SET_PARAMS;
h->cdsp.cavs_filter_lv(h->cy + 8,h->l_stride,alpha,beta,tc,bs[2],bs[3]);
h->cdsp.cavs_filter_lh(h->cy + 8*h->l_stride,h->l_stride,alpha,beta,tc,
bs[6],bs[7]);
if(h->flags & B_AVAIL) {
qp_avg = (h->qp + h->top_qp[h->mbx] + 1) >> 1;
SET_PARAMS;
h->cdsp.cavs_filter_lh(h->cy,h->l_stride,alpha,beta,tc,bs[4],bs[5]);
h->cdsp.cavs_filter_ch(h->cu,h->c_stride,alpha,beta,tc,bs[4],bs[5]);
h->cdsp.cavs_filter_ch(h->cv,h->c_stride,alpha,beta,tc,bs[4],bs[5]);
}
}
}
h->left_qp = h->qp;
h->top_qp[h->mbx] = h->qp;
}
#undef SET_PARAMS
/*****************************************************************************
*
* spatial intra prediction
*
****************************************************************************/
void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top,
uint8_t **left, int block) {
int i;
switch(block) {
case 0:
*left = h->left_border_y;
h->left_border_y[0] = h->left_border_y[1];
memset(&h->left_border_y[17],h->left_border_y[16],9);
memcpy(&top[1],&h->top_border_y[h->mbx*16],16);
top[17] = top[16];
top[0] = top[1];
if((h->flags & A_AVAIL) && (h->flags & B_AVAIL))
h->left_border_y[0] = top[0] = h->topleft_border_y;
break;
case 1:
*left = h->intern_border_y;
for(i=0;i<8;i++)
h->intern_border_y[i+1] = *(h->cy + 7 + i*h->l_stride);
memset(&h->intern_border_y[9],h->intern_border_y[8],9);
h->intern_border_y[0] = h->intern_border_y[1];
memcpy(&top[1],&h->top_border_y[h->mbx*16+8],8);
if(h->flags & C_AVAIL)
memcpy(&top[9],&h->top_border_y[(h->mbx + 1)*16],8);
else
memset(&top[9],top[8],9);
top[17] = top[16];
top[0] = top[1];
if(h->flags & B_AVAIL)
h->intern_border_y[0] = top[0] = h->top_border_y[h->mbx*16+7];
break;
case 2:
*left = &h->left_border_y[8];
memcpy(&top[1],h->cy + 7*h->l_stride,16);
top[17] = top[16];
top[0] = top[1];
if(h->flags & A_AVAIL)
top[0] = h->left_border_y[8];
break;
case 3:
*left = &h->intern_border_y[8];
for(i=0;i<8;i++)
h->intern_border_y[i+9] = *(h->cy + 7 + (i+8)*h->l_stride);
memset(&h->intern_border_y[17],h->intern_border_y[16],9);
memcpy(&top[0],h->cy + 7 + 7*h->l_stride,9);
memset(&top[9],top[8],9);
break;
}
}
void ff_cavs_load_intra_pred_chroma(AVSContext *h) {
/* extend borders by one pixel */
h->left_border_u[9] = h->left_border_u[8];
h->left_border_v[9] = h->left_border_v[8];
h->top_border_u[h->mbx*10+9] = h->top_border_u[h->mbx*10+8];
h->top_border_v[h->mbx*10+9] = h->top_border_v[h->mbx*10+8];
if(h->mbx && h->mby) {
h->top_border_u[h->mbx*10] = h->left_border_u[0] = h->topleft_border_u;
h->top_border_v[h->mbx*10] = h->left_border_v[0] = h->topleft_border_v;
} else {
h->left_border_u[0] = h->left_border_u[1];
h->left_border_v[0] = h->left_border_v[1];
h->top_border_u[h->mbx*10] = h->top_border_u[h->mbx*10+1];
h->top_border_v[h->mbx*10] = h->top_border_v[h->mbx*10+1];
}
}
static void intra_pred_vert(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
int y;
uint64_t a = AV_RN64(&top[1]);
for(y=0;y<8;y++) {
*((uint64_t *)(d+y*stride)) = a;
}
}
static void intra_pred_horiz(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
int y;
uint64_t a;
for(y=0;y<8;y++) {
a = left[y+1] * 0x0101010101010101ULL;
*((uint64_t *)(d+y*stride)) = a;
}
}
static void intra_pred_dc_128(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
int y;
uint64_t a = 0x8080808080808080ULL;
for(y=0;y<8;y++)
*((uint64_t *)(d+y*stride)) = a;
}
static void intra_pred_plane(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
int x,y,ia;
int ih = 0;
int iv = 0;
uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
for(x=0; x<4; x++) {
ih += (x+1)*(top[5+x]-top[3-x]);
iv += (x+1)*(left[5+x]-left[3-x]);
}
ia = (top[8]+left[8])<<4;
ih = (17*ih+16)>>5;
iv = (17*iv+16)>>5;
for(y=0; y<8; y++)
for(x=0; x<8; x++)
d[y*stride+x] = cm[(ia+(x-3)*ih+(y-3)*iv+16)>>5];
}
#define LOWPASS(ARRAY,INDEX) \
(( ARRAY[(INDEX)-1] + 2*ARRAY[(INDEX)] + ARRAY[(INDEX)+1] + 2) >> 2)
static void intra_pred_lp(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
int x,y;
for(y=0; y<8; y++)
for(x=0; x<8; x++)
d[y*stride+x] = (LOWPASS(top,x+1) + LOWPASS(left,y+1)) >> 1;
}
static void intra_pred_down_left(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
int x,y;
for(y=0; y<8; y++)
for(x=0; x<8; x++)
d[y*stride+x] = (LOWPASS(top,x+y+2) + LOWPASS(left,x+y+2)) >> 1;
}
static void intra_pred_down_right(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
int x,y;
for(y=0; y<8; y++)
for(x=0; x<8; x++)
if(x==y)
d[y*stride+x] = (left[1]+2*top[0]+top[1]+2)>>2;
else if(x>y)
d[y*stride+x] = LOWPASS(top,x-y);
else
d[y*stride+x] = LOWPASS(left,y-x);
}
static void intra_pred_lp_left(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
int x,y;
for(y=0; y<8; y++)
for(x=0; x<8; x++)
d[y*stride+x] = LOWPASS(left,y+1);
}
static void intra_pred_lp_top(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
int x,y;
for(y=0; y<8; y++)
for(x=0; x<8; x++)
d[y*stride+x] = LOWPASS(top,x+1);
}
#undef LOWPASS
static inline void modify_pred(const int8_t *mod_table, int *mode)
{
*mode = mod_table[*mode];
if(*mode < 0) {
av_log(NULL, AV_LOG_ERROR, "Illegal intra prediction mode\n");
*mode = 0;
}
}
void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv) {
/* save pred modes before they get modified */
h->pred_mode_Y[3] = h->pred_mode_Y[5];
h->pred_mode_Y[6] = h->pred_mode_Y[8];
h->top_pred_Y[h->mbx*2+0] = h->pred_mode_Y[7];
h->top_pred_Y[h->mbx*2+1] = h->pred_mode_Y[8];
/* modify pred modes according to availability of neighbour samples */
if(!(h->flags & A_AVAIL)) {
modify_pred(left_modifier_l, &h->pred_mode_Y[4]);
modify_pred(left_modifier_l, &h->pred_mode_Y[7]);
modify_pred(left_modifier_c, pred_mode_uv);
}
if(!(h->flags & B_AVAIL)) {
modify_pred(top_modifier_l, &h->pred_mode_Y[4]);
modify_pred(top_modifier_l, &h->pred_mode_Y[5]);
modify_pred(top_modifier_c, pred_mode_uv);
}
}
/*****************************************************************************
*
* motion compensation
*
****************************************************************************/
static inline void mc_dir_part(AVSContext *h,Picture *pic,
int chroma_height,int delta,int list,uint8_t *dest_y,
uint8_t *dest_cb,uint8_t *dest_cr,int src_x_offset,
int src_y_offset,qpel_mc_func *qpix_op,
h264_chroma_mc_func chroma_op,cavs_vector *mv)
{
MpegEncContext * const s = &h->s;
const int mx= mv->x + src_x_offset*8;
const int my= mv->y + src_y_offset*8;
const int luma_xy= (mx&3) + ((my&3)<<2);
uint8_t * src_y = pic->f.data[0] + (mx >> 2) + (my >> 2) * h->l_stride;
uint8_t * src_cb = pic->f.data[1] + (mx >> 3) + (my >> 3) * h->c_stride;
uint8_t * src_cr = pic->f.data[2] + (mx >> 3) + (my >> 3) * h->c_stride;
int extra_width= 0; //(s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16;
int extra_height= extra_width;
int emu=0;
const int full_mx= mx>>2;
const int full_my= my>>2;
const int pic_width = 16*h->mb_width;
const int pic_height = 16*h->mb_height;
if(!pic->f.data[0])
return;
if(mx&7) extra_width -= 3;
if(my&7) extra_height -= 3;
if( full_mx < 0-extra_width
|| full_my < 0-extra_height
|| full_mx + 16/*FIXME*/ > pic_width + extra_width
|| full_my + 16/*FIXME*/ > pic_height + extra_height){
s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_y - 2 - 2*h->l_stride, h->l_stride,
16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height);
src_y= s->edge_emu_buffer + 2 + 2*h->l_stride;
emu=1;
}
qpix_op[luma_xy](dest_y, src_y, h->l_stride); //FIXME try variable height perhaps?
if(emu){
s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_cb, h->c_stride,
9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
src_cb= s->edge_emu_buffer;
}
chroma_op(dest_cb, src_cb, h->c_stride, chroma_height, mx&7, my&7);
if(emu){
s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_cr, h->c_stride,
9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
src_cr= s->edge_emu_buffer;
}
chroma_op(dest_cr, src_cr, h->c_stride, chroma_height, mx&7, my&7);
}
static inline void mc_part_std(AVSContext *h,int chroma_height,int delta,
uint8_t *dest_y,uint8_t *dest_cb,uint8_t *dest_cr,
int x_offset, int y_offset,qpel_mc_func *qpix_put,
h264_chroma_mc_func chroma_put,qpel_mc_func *qpix_avg,
h264_chroma_mc_func chroma_avg, cavs_vector *mv)
{
qpel_mc_func *qpix_op= qpix_put;
h264_chroma_mc_func chroma_op= chroma_put;
dest_y += 2*x_offset + 2*y_offset*h->l_stride;
dest_cb += x_offset + y_offset*h->c_stride;
dest_cr += x_offset + y_offset*h->c_stride;
x_offset += 8*h->mbx;
y_offset += 8*h->mby;
if(mv->ref >= 0){
Picture *ref= &h->DPB[mv->ref];
mc_dir_part(h, ref, chroma_height, delta, 0,
dest_y, dest_cb, dest_cr, x_offset, y_offset,
qpix_op, chroma_op, mv);
qpix_op= qpix_avg;
chroma_op= chroma_avg;
}
if((mv+MV_BWD_OFFS)->ref >= 0){
Picture *ref= &h->DPB[0];
mc_dir_part(h, ref, chroma_height, delta, 1,
dest_y, dest_cb, dest_cr, x_offset, y_offset,
qpix_op, chroma_op, mv+MV_BWD_OFFS);
}
}
void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type) {
if(ff_cavs_partition_flags[mb_type] == 0){ // 16x16
mc_part_std(h, 8, 0, h->cy, h->cu, h->cv, 0, 0,
h->cdsp.put_cavs_qpel_pixels_tab[0],
h->s.dsp.put_h264_chroma_pixels_tab[0],
h->cdsp.avg_cavs_qpel_pixels_tab[0],
h->s.dsp.avg_h264_chroma_pixels_tab[0],&h->mv[MV_FWD_X0]);
}else{
mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 0,
h->cdsp.put_cavs_qpel_pixels_tab[1],
h->s.dsp.put_h264_chroma_pixels_tab[1],
h->cdsp.avg_cavs_qpel_pixels_tab[1],
h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X0]);
mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 4, 0,
h->cdsp.put_cavs_qpel_pixels_tab[1],
h->s.dsp.put_h264_chroma_pixels_tab[1],
h->cdsp.avg_cavs_qpel_pixels_tab[1],
h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X1]);
mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 4,
h->cdsp.put_cavs_qpel_pixels_tab[1],
h->s.dsp.put_h264_chroma_pixels_tab[1],
h->cdsp.avg_cavs_qpel_pixels_tab[1],
h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X2]);
mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 4, 4,
h->cdsp.put_cavs_qpel_pixels_tab[1],
h->s.dsp.put_h264_chroma_pixels_tab[1],
h->cdsp.avg_cavs_qpel_pixels_tab[1],
h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X3]);
}
}
/*****************************************************************************
*
* motion vector prediction
*
****************************************************************************/
static inline void scale_mv(AVSContext *h, int *d_x, int *d_y, cavs_vector *src, int distp) {
int den = h->scale_den[src->ref];
*d_x = (src->x*distp*den + 256 + (src->x>>31)) >> 9;
*d_y = (src->y*distp*den + 256 + (src->y>>31)) >> 9;
}
static inline void mv_pred_median(AVSContext *h, cavs_vector *mvP,
cavs_vector *mvA, cavs_vector *mvB, cavs_vector *mvC) {
int ax, ay, bx, by, cx, cy;
int len_ab, len_bc, len_ca, len_mid;
/* scale candidates according to their temporal span */
scale_mv(h, &ax, &ay, mvA, mvP->dist);
scale_mv(h, &bx, &by, mvB, mvP->dist);
scale_mv(h, &cx, &cy, mvC, mvP->dist);
/* find the geometrical median of the three candidates */
len_ab = abs(ax - bx) + abs(ay - by);
len_bc = abs(bx - cx) + abs(by - cy);
len_ca = abs(cx - ax) + abs(cy - ay);
len_mid = mid_pred(len_ab, len_bc, len_ca);
if(len_mid == len_ab) {
mvP->x = cx;
mvP->y = cy;
} else if(len_mid == len_bc) {
mvP->x = ax;
mvP->y = ay;
} else {
mvP->x = bx;
mvP->y = by;
}
}
void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC,
enum cavs_mv_pred mode, enum cavs_block size, int ref) {
cavs_vector *mvP = &h->mv[nP];
cavs_vector *mvA = &h->mv[nP-1];
cavs_vector *mvB = &h->mv[nP-4];
cavs_vector *mvC = &h->mv[nC];
const cavs_vector *mvP2 = NULL;
mvP->ref = ref;
mvP->dist = h->dist[mvP->ref];
if(mvC->ref == NOT_AVAIL)
mvC = &h->mv[nP-5]; // set to top-left (mvD)
if((mode == MV_PRED_PSKIP) &&
((mvA->ref == NOT_AVAIL) || (mvB->ref == NOT_AVAIL) ||
((mvA->x | mvA->y | mvA->ref) == 0) ||
((mvB->x | mvB->y | mvB->ref) == 0) )) {
mvP2 = &un_mv;
/* if there is only one suitable candidate, take it */
} else if((mvA->ref >= 0) && (mvB->ref < 0) && (mvC->ref < 0)) {
mvP2= mvA;
} else if((mvA->ref < 0) && (mvB->ref >= 0) && (mvC->ref < 0)) {
mvP2= mvB;
} else if((mvA->ref < 0) && (mvB->ref < 0) && (mvC->ref >= 0)) {
mvP2= mvC;
} else if(mode == MV_PRED_LEFT && mvA->ref == ref){
mvP2= mvA;
} else if(mode == MV_PRED_TOP && mvB->ref == ref){
mvP2= mvB;
} else if(mode == MV_PRED_TOPRIGHT && mvC->ref == ref){
mvP2= mvC;
}
if(mvP2){
mvP->x = mvP2->x;
mvP->y = mvP2->y;
}else
mv_pred_median(h, mvP, mvA, mvB, mvC);
if(mode < MV_PRED_PSKIP) {
mvP->x += get_se_golomb(&h->s.gb);
mvP->y += get_se_golomb(&h->s.gb);
}
set_mvs(mvP,size);
}
/*****************************************************************************
*
* macroblock level
*
****************************************************************************/
/**
* initialise predictors for motion vectors and intra prediction
*/
void ff_cavs_init_mb(AVSContext *h) {
int i;
/* copy predictors from top line (MB B and C) into cache */
for(i=0;i<3;i++) {
h->mv[MV_FWD_B2+i] = h->top_mv[0][h->mbx*2+i];
h->mv[MV_BWD_B2+i] = h->top_mv[1][h->mbx*2+i];
}
h->pred_mode_Y[1] = h->top_pred_Y[h->mbx*2+0];
h->pred_mode_Y[2] = h->top_pred_Y[h->mbx*2+1];
/* clear top predictors if MB B is not available */
if(!(h->flags & B_AVAIL)) {
h->mv[MV_FWD_B2] = un_mv;
h->mv[MV_FWD_B3] = un_mv;
h->mv[MV_BWD_B2] = un_mv;
h->mv[MV_BWD_B3] = un_mv;
h->pred_mode_Y[1] = h->pred_mode_Y[2] = NOT_AVAIL;
h->flags &= ~(C_AVAIL|D_AVAIL);
} else if(h->mbx) {
h->flags |= D_AVAIL;
}
if(h->mbx == h->mb_width-1) //MB C not available
h->flags &= ~C_AVAIL;
/* clear top-right predictors if MB C is not available */
if(!(h->flags & C_AVAIL)) {
h->mv[MV_FWD_C2] = un_mv;
h->mv[MV_BWD_C2] = un_mv;
}
/* clear top-left predictors if MB D is not available */
if(!(h->flags & D_AVAIL)) {
h->mv[MV_FWD_D3] = un_mv;
h->mv[MV_BWD_D3] = un_mv;
}
}
/**
* save predictors for later macroblocks and increase
* macroblock address
* @return 0 if end of frame is reached, 1 otherwise
*/
int ff_cavs_next_mb(AVSContext *h) {
int i;
h->flags |= A_AVAIL;
h->cy += 16;
h->cu += 8;
h->cv += 8;
/* copy mvs as predictors to the left */
for(i=0;i<=20;i+=4)
h->mv[i] = h->mv[i+2];
/* copy bottom mvs from cache to top line */
h->top_mv[0][h->mbx*2+0] = h->mv[MV_FWD_X2];
h->top_mv[0][h->mbx*2+1] = h->mv[MV_FWD_X3];
h->top_mv[1][h->mbx*2+0] = h->mv[MV_BWD_X2];
h->top_mv[1][h->mbx*2+1] = h->mv[MV_BWD_X3];
/* next MB address */
h->mbidx++;
h->mbx++;
if(h->mbx == h->mb_width) { //new mb line
h->flags = B_AVAIL|C_AVAIL;
/* clear left pred_modes */
h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
/* clear left mv predictors */
for(i=0;i<=20;i+=4)
h->mv[i] = un_mv;
h->mbx = 0;
h->mby++;
/* re-calculate sample pointers */
h->cy = h->picture.f.data[0] + h->mby * 16 * h->l_stride;
h->cu = h->picture.f.data[1] + h->mby * 8 * h->c_stride;
h->cv = h->picture.f.data[2] + h->mby * 8 * h->c_stride;
if(h->mby == h->mb_height) { //frame end
return 0;
}
}
return 1;
}
/*****************************************************************************
*
* frame level
*
****************************************************************************/
void ff_cavs_init_pic(AVSContext *h) {
int i;
/* clear some predictors */
for(i=0;i<=20;i+=4)
h->mv[i] = un_mv;
h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
h->cy = h->picture.f.data[0];
h->cu = h->picture.f.data[1];
h->cv = h->picture.f.data[2];
h->l_stride = h->picture.f.linesize[0];
h->c_stride = h->picture.f.linesize[1];
h->luma_scan[2] = 8*h->l_stride;
h->luma_scan[3] = 8*h->l_stride+8;
h->mbx = h->mby = h->mbidx = 0;
h->flags = 0;
}
/*****************************************************************************
*
* headers and interface
*
****************************************************************************/
/**
* some predictions require data from the top-neighbouring macroblock.
* this data has to be stored for one complete row of macroblocks
* and this storage space is allocated here
*/
void ff_cavs_init_top_lines(AVSContext *h) {
/* alloc top line of predictors */
h->top_qp = av_mallocz( h->mb_width);
h->top_mv[0] = av_mallocz((h->mb_width*2+1)*sizeof(cavs_vector));
h->top_mv[1] = av_mallocz((h->mb_width*2+1)*sizeof(cavs_vector));
h->top_pred_Y = av_mallocz( h->mb_width*2*sizeof(*h->top_pred_Y));
h->top_border_y = av_mallocz((h->mb_width+1)*16);
h->top_border_u = av_mallocz( h->mb_width * 10);
h->top_border_v = av_mallocz( h->mb_width * 10);
/* alloc space for co-located MVs and types */
h->col_mv = av_mallocz( h->mb_width*h->mb_height*4*sizeof(cavs_vector));
h->col_type_base = av_mallocz(h->mb_width*h->mb_height);
h->block = av_mallocz(64*sizeof(DCTELEM));
}
av_cold int ff_cavs_init(AVCodecContext *avctx) {
AVSContext *h = avctx->priv_data;
MpegEncContext * const s = &h->s;
ff_MPV_decode_defaults(s);
ff_cavsdsp_init(&h->cdsp, avctx);
s->avctx = avctx;
avctx->pix_fmt= PIX_FMT_YUV420P;
h->luma_scan[0] = 0;
h->luma_scan[1] = 8;
h->intra_pred_l[ INTRA_L_VERT] = intra_pred_vert;
h->intra_pred_l[ INTRA_L_HORIZ] = intra_pred_horiz;
h->intra_pred_l[ INTRA_L_LP] = intra_pred_lp;
h->intra_pred_l[ INTRA_L_DOWN_LEFT] = intra_pred_down_left;
h->intra_pred_l[INTRA_L_DOWN_RIGHT] = intra_pred_down_right;
h->intra_pred_l[ INTRA_L_LP_LEFT] = intra_pred_lp_left;
h->intra_pred_l[ INTRA_L_LP_TOP] = intra_pred_lp_top;
h->intra_pred_l[ INTRA_L_DC_128] = intra_pred_dc_128;
h->intra_pred_c[ INTRA_C_LP] = intra_pred_lp;
h->intra_pred_c[ INTRA_C_HORIZ] = intra_pred_horiz;
h->intra_pred_c[ INTRA_C_VERT] = intra_pred_vert;
h->intra_pred_c[ INTRA_C_PLANE] = intra_pred_plane;
h->intra_pred_c[ INTRA_C_LP_LEFT] = intra_pred_lp_left;
h->intra_pred_c[ INTRA_C_LP_TOP] = intra_pred_lp_top;
h->intra_pred_c[ INTRA_C_DC_128] = intra_pred_dc_128;
h->mv[ 7] = un_mv;
h->mv[19] = un_mv;
return 0;
}
av_cold int ff_cavs_end(AVCodecContext *avctx) {
AVSContext *h = avctx->priv_data;
ff_MPV_common_end(&h->s);
av_free(h->top_qp);
av_free(h->top_mv[0]);
av_free(h->top_mv[1]);
av_free(h->top_pred_Y);
av_free(h->top_border_y);
av_free(h->top_border_u);
av_free(h->top_border_v);
av_free(h->col_mv);
av_free(h->col_type_base);
av_free(h->block);
return 0;
}
Jump to Line
Something went wrong with that request. Please try again.