diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/cavs.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/cavs.c | 716 |
1 files changed, 716 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavcodec/cavs.c b/contrib/ffmpeg/libavcodec/cavs.c new file mode 100644 index 000000000..2867c0679 --- /dev/null +++ b/contrib/ffmpeg/libavcodec/cavs.c @@ -0,0 +1,716 @@ +/* + * 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 cavs.c + * Chinese AVS video (AVS1-P2, JiZhun profile) decoder + * @author Stefan Gehrer <stefan.gehrer@gmx.de> + */ + +#include "avcodec.h" +#include "bitstream.h" +#include "golomb.h" +#include "cavs.h" +#include "cavsdata.h" + +/***************************************************************************** + * + * in-loop deblocking filter + * + ****************************************************************************/ + +static inline int get_bs(vector_t *mvP, vector_t *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 mb_t mb_type) { + DECLARE_ALIGNED_8(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) + *((uint64_t *)bs) = 0x0202020202020202ULL; + else{ + *((uint64_t *)bs) = 0; + 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( *((uint64_t *)bs) ) { + if(h->flags & A_AVAIL) { + qp_avg = (h->qp + h->left_qp + 1) >> 1; + SET_PARAMS; + h->s.dsp.cavs_filter_lv(h->cy,h->l_stride,alpha,beta,tc,bs[0],bs[1]); + h->s.dsp.cavs_filter_cv(h->cu,h->c_stride,alpha,beta,tc,bs[0],bs[1]); + h->s.dsp.cavs_filter_cv(h->cv,h->c_stride,alpha,beta,tc,bs[0],bs[1]); + } + qp_avg = h->qp; + SET_PARAMS; + h->s.dsp.cavs_filter_lv(h->cy + 8,h->l_stride,alpha,beta,tc,bs[2],bs[3]); + h->s.dsp.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->s.dsp.cavs_filter_lh(h->cy,h->l_stride,alpha,beta,tc,bs[4],bs[5]); + h->s.dsp.cavs_filter_ch(h->cu,h->c_stride,alpha,beta,tc,bs[4],bs[5]); + h->s.dsp.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 + +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(ff_left_modifier_l, &h->pred_mode_Y[4] ); + modify_pred(ff_left_modifier_l, &h->pred_mode_Y[7] ); + modify_pred(ff_left_modifier_c, pred_mode_uv ); + } + if(!(h->flags & B_AVAIL)) { + modify_pred(ff_top_modifier_l, &h->pred_mode_Y[4] ); + modify_pred(ff_top_modifier_l, &h->pred_mode_Y[5] ); + modify_pred(ff_top_modifier_c, pred_mode_uv ); + } +} + +/***************************************************************************** + * + * motion compensation + * + ****************************************************************************/ + +static inline void mc_dir_part(AVSContext *h,Picture *pic,int square, + 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,vector_t *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->data[0] + (mx>>2) + (my>>2)*h->l_stride; + uint8_t * src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->c_stride; + uint8_t * src_cr= pic->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->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){ + ff_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(!square){ + qpix_op[luma_xy](dest_y + delta, src_y + delta, h->l_stride); + } + + if(emu){ + ff_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){ + ff_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 square,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, vector_t *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, square, 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, square, 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 mb_t mb_type) { + if(ff_cavs_partition_flags[mb_type] == 0){ // 16x16 + mc_part_std(h, 1, 8, 0, h->cy, h->cu, h->cv, 0, 0, + h->s.dsp.put_cavs_qpel_pixels_tab[0], + h->s.dsp.put_h264_chroma_pixels_tab[0], + h->s.dsp.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, 1, 4, 0, h->cy, h->cu, h->cv, 0, 0, + h->s.dsp.put_cavs_qpel_pixels_tab[1], + h->s.dsp.put_h264_chroma_pixels_tab[1], + h->s.dsp.avg_cavs_qpel_pixels_tab[1], + h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X0]); + mc_part_std(h, 1, 4, 0, h->cy, h->cu, h->cv, 4, 0, + h->s.dsp.put_cavs_qpel_pixels_tab[1], + h->s.dsp.put_h264_chroma_pixels_tab[1], + h->s.dsp.avg_cavs_qpel_pixels_tab[1], + h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X1]); + mc_part_std(h, 1, 4, 0, h->cy, h->cu, h->cv, 0, 4, + h->s.dsp.put_cavs_qpel_pixels_tab[1], + h->s.dsp.put_h264_chroma_pixels_tab[1], + h->s.dsp.avg_cavs_qpel_pixels_tab[1], + h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X2]); + mc_part_std(h, 1, 4, 0, h->cy, h->cu, h->cv, 4, 4, + h->s.dsp.put_cavs_qpel_pixels_tab[1], + h->s.dsp.put_h264_chroma_pixels_tab[1], + h->s.dsp.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, vector_t *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, vector_t *mvP, vector_t *mvA, vector_t *mvB, vector_t *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 mv_loc_t nP, enum mv_loc_t nC, + enum mv_pred_t mode, enum block_t size, int ref) { + vector_t *mvP = &h->mv[nP]; + vector_t *mvA = &h->mv[nP-1]; + vector_t *mvB = &h->mv[nP-4]; + vector_t *mvC = &h->mv[nC]; + const vector_t *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 = &ff_cavs_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] = ff_cavs_un_mv; + h->mv[MV_FWD_B3] = ff_cavs_un_mv; + h->mv[MV_BWD_B2] = ff_cavs_un_mv; + h->mv[MV_BWD_B3] = ff_cavs_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] = ff_cavs_un_mv; + h->mv[MV_BWD_C2] = ff_cavs_un_mv; + } + /* clear top-left predictors if MB D is not available */ + if(!(h->flags & D_AVAIL)) { + h->mv[MV_FWD_D3] = ff_cavs_un_mv; + h->mv[MV_BWD_D3] = ff_cavs_un_mv; + } + /* set pointer for co-located macroblock type */ + h->col_type = &h->col_type_base[h->mby*h->mb_width + h->mbx]; +} + +/** + * save predictors for later macroblocks and increase + * macroblock address + * @returns 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->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] = ff_cavs_un_mv; + h->mbx = 0; + h->mby++; + /* re-calculate sample pointers */ + h->cy = h->picture.data[0] + h->mby*16*h->l_stride; + h->cu = h->picture.data[1] + h->mby*8*h->c_stride; + h->cv = h->picture.data[2] + h->mby*8*h->c_stride; + if(h->mby == h->mb_height) { //frame end + return 0; + } else { + //check_for_slice(h); + } + } + 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] = ff_cavs_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.data[0]; + h->cu = h->picture.data[1]; + h->cv = h->picture.data[2]; + h->l_stride = h->picture.linesize[0]; + h->c_stride = h->picture.linesize[1]; + h->luma_scan[2] = 8*h->l_stride; + h->luma_scan[3] = 8*h->l_stride+8; + h->mbx = h->mby = 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_malloc( h->mb_width); + h->top_mv[0] = av_malloc((h->mb_width*2+1)*sizeof(vector_t)); + h->top_mv[1] = av_malloc((h->mb_width*2+1)*sizeof(vector_t)); + h->top_pred_Y = av_malloc( h->mb_width*2*sizeof(*h->top_pred_Y)); + h->top_border_y = av_malloc((h->mb_width+1)*16); + h->top_border_u = av_malloc((h->mb_width)*10); + h->top_border_v = av_malloc((h->mb_width)*10); + + /* alloc space for co-located MVs and types */ + h->col_mv = av_malloc( h->mb_width*h->mb_height*4*sizeof(vector_t)); + h->col_type_base = av_malloc(h->mb_width*h->mb_height); + h->block = av_mallocz(64*sizeof(DCTELEM)); +} + +int ff_cavs_init(AVCodecContext *avctx) { + AVSContext *h = avctx->priv_data; + MpegEncContext * const s = &h->s; + + MPV_decode_defaults(s); + 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] = ff_cavs_un_mv; + h->mv[19] = ff_cavs_un_mv; + return 0; +} + +int ff_cavs_end(AVCodecContext *avctx) { + AVSContext *h = avctx->priv_data; + + 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; +} |