diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/cavs.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/cavs.c | 1540 |
1 files changed, 0 insertions, 1540 deletions
diff --git a/contrib/ffmpeg/libavcodec/cavs.c b/contrib/ffmpeg/libavcodec/cavs.c deleted file mode 100644 index 4672635d7..000000000 --- a/contrib/ffmpeg/libavcodec/cavs.c +++ /dev/null @@ -1,1540 +0,0 @@ -/* - * 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 St, 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 "mpegvideo.h" -#include "cavsdata.h" - -#ifdef CONFIG_CAVS_DECODER -typedef struct { - MpegEncContext s; - Picture picture; ///< currently decoded frame - Picture DPB[2]; ///< reference frames - int dist[2]; ///< temporal distances from current frame to ref frames - int profile, level; - int aspect_ratio; - int mb_width, mb_height; - int pic_type; - int progressive; - int pic_structure; - int skip_mode_flag; ///< select between skip_count or one skip_flag per MB - int loop_filter_disable; - int alpha_offset, beta_offset; - int ref_flag; - int mbx, mby; ///< macroblock coordinates - int flags; ///< availability flags of neighbouring macroblocks - int stc; ///< last start code - uint8_t *cy, *cu, *cv; ///< current MB sample pointers - int left_qp; - uint8_t *top_qp; - - /** mv motion vector cache - 0: D3 B2 B3 C2 - 4: A1 X0 X1 - - 8: A3 X2 X3 - - - X are the vectors in the current macroblock (5,6,9,10) - A is the macroblock to the left (4,8) - B is the macroblock to the top (1,2) - C is the macroblock to the top-right (3) - D is the macroblock to the top-left (0) - - the same is repeated for backward motion vectors */ - vector_t mv[2*4*3]; - vector_t *top_mv[2]; - vector_t *col_mv; - - /** luma pred mode cache - 0: -- B2 B3 - 3: A1 X0 X1 - 6: A3 X2 X3 */ - int pred_mode_Y[3*3]; - int *top_pred_Y; - int l_stride, c_stride; - int luma_scan[4]; - int qp; - int qp_fixed; - int cbp; - ScanTable scantable; - - /** intra prediction is done with un-deblocked samples - they are saved here before deblocking the MB */ - uint8_t *top_border_y, *top_border_u, *top_border_v; - uint8_t left_border_y[26], left_border_u[10], left_border_v[10]; - uint8_t intern_border_y[26]; - uint8_t topleft_border_y, topleft_border_u, topleft_border_v; - - void (*intra_pred_l[8])(uint8_t *d,uint8_t *top,uint8_t *left,int stride); - void (*intra_pred_c[7])(uint8_t *d,uint8_t *top,uint8_t *left,int stride); - uint8_t *col_type_base; - uint8_t *col_type; - - /* scaling factors for MV prediction */ - int sym_factor; ///< for scaling in symmetrical B block - int direct_den[2]; ///< for scaling in direct B block - int scale_den[2]; ///< for scaling neighbouring MVs - - int got_keyframe; - DCTELEM *block; -} AVSContext; - -/***************************************************************************** - * - * 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 | - * --------- - * - */ -static void filter_mb(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(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(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 - * - ****************************************************************************/ - -static inline void 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; - } -} - -static void intra_pred_vert(uint8_t *d,uint8_t *top,uint8_t *left,int stride) { - int y; - uint64_t a = unaligned64(&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 int_fast8_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; - } -} - -/***************************************************************************** - * - * 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); - } -} - -static void inter_pred(AVSContext *h, enum mb_t mb_type) { - if(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]); - } - /* set intra prediction modes to default values */ - h->pred_mode_Y[3] = h->pred_mode_Y[6] = INTRA_L_LP; - h->top_pred_Y[h->mbx*2+0] = h->top_pred_Y[h->mbx*2+1] = INTRA_L_LP; -} - -/***************************************************************************** - * - * motion vector prediction - * - ****************************************************************************/ - -static inline void set_mvs(vector_t *mv, enum block_t size) { - switch(size) { - case BLK_16X16: - mv[MV_STRIDE ] = mv[0]; - mv[MV_STRIDE+1] = mv[0]; - case BLK_16X8: - mv[1] = mv[0]; - break; - case BLK_8X16: - mv[MV_STRIDE] = mv[0]; - break; - } -} - -static inline void store_mvs(AVSContext *h) { - h->col_mv[(h->mby*h->mb_width + h->mbx)*4 + 0] = h->mv[MV_FWD_X0]; - h->col_mv[(h->mby*h->mb_width + h->mbx)*4 + 1] = h->mv[MV_FWD_X1]; - h->col_mv[(h->mby*h->mb_width + h->mbx)*4 + 2] = h->mv[MV_FWD_X2]; - h->col_mv[(h->mby*h->mb_width + h->mbx)*4 + 3] = h->mv[MV_FWD_X3]; -} - -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; - } -} - -static inline void mv_pred_direct(AVSContext *h, vector_t *pmv_fw, - vector_t *col_mv) { - vector_t *pmv_bw = pmv_fw + MV_BWD_OFFS; - int den = h->direct_den[col_mv->ref]; - int m = col_mv->x >> 31; - - pmv_fw->dist = h->dist[1]; - pmv_bw->dist = h->dist[0]; - pmv_fw->ref = 1; - pmv_bw->ref = 0; - /* scale the co-located motion vector according to its temporal span */ - pmv_fw->x = (((den+(den*col_mv->x*pmv_fw->dist^m)-m-1)>>14)^m)-m; - pmv_bw->x = m-(((den+(den*col_mv->x*pmv_bw->dist^m)-m-1)>>14)^m); - m = col_mv->y >> 31; - pmv_fw->y = (((den+(den*col_mv->y*pmv_fw->dist^m)-m-1)>>14)^m)-m; - pmv_bw->y = m-(((den+(den*col_mv->y*pmv_bw->dist^m)-m-1)>>14)^m); -} - -static inline void mv_pred_sym(AVSContext *h, vector_t *src, enum block_t size) { - vector_t *dst = src + MV_BWD_OFFS; - - /* backward mv is the scaled and negated forward mv */ - dst->x = -((src->x * h->sym_factor + 256) >> 9); - dst->y = -((src->y * h->sym_factor + 256) >> 9); - dst->ref = 0; - dst->dist = h->dist[0]; - set_mvs(dst, size); -} - -static void mv_pred(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 = &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); -} - -/***************************************************************************** - * - * residual data decoding - * - ****************************************************************************/ - -/** kth-order exponential golomb code */ -static inline int get_ue_code(GetBitContext *gb, int order) { - if(order) { - int ret = get_ue_golomb(gb) << order; - return ret + get_bits(gb,order); - } - return get_ue_golomb(gb); -} - -/** - * decode coefficients from one 8x8 block, dequantize, inverse transform - * and add them to sample block - * @param r pointer to 2D VLC table - * @param esc_golomb_order escape codes are k-golomb with this order k - * @param qp quantizer - * @param dst location of sample block - * @param stride line stride in frame buffer - */ -static int decode_residual_block(AVSContext *h, GetBitContext *gb, - const residual_vlc_t *r, int esc_golomb_order, - int qp, uint8_t *dst, int stride) { - int i,pos = -1; - int level_code, esc_code, level, run, mask; - int level_buf[64]; - int run_buf[64]; - int dqm = dequant_mul[qp]; - int dqs = dequant_shift[qp]; - int dqa = 1 << (dqs - 1); - const uint8_t *scantab = h->scantable.permutated; - DCTELEM *block = h->block; - - for(i=0;i<65;i++) { - level_code = get_ue_code(gb,r->golomb_order); - if(level_code >= ESCAPE_CODE) { - run = ((level_code - ESCAPE_CODE) >> 1) + 1; - esc_code = get_ue_code(gb,esc_golomb_order); - level = esc_code + (run > r->max_run ? 1 : r->level_add[run]); - while(level > r->inc_limit) - r++; - mask = -(level_code & 1); - level = (level^mask) - mask; - } else { - level = r->rltab[level_code][0]; - if(!level) //end of block signal - break; - run = r->rltab[level_code][1]; - r += r->rltab[level_code][2]; - } - level_buf[i] = level; - run_buf[i] = run; - } - /* inverse scan and dequantization */ - while(--i >= 0){ - pos += run_buf[i]; - if(pos > 63) { - av_log(h->s.avctx, AV_LOG_ERROR, - "position out of block bounds at pic %d MB(%d,%d)\n", - h->picture.poc, h->mbx, h->mby); - return -1; - } - block[scantab[pos]] = (level_buf[i]*dqm + dqa) >> dqs; - } - h->s.dsp.cavs_idct8_add(dst,block,stride); - return 0; -} - - -static inline void decode_residual_chroma(AVSContext *h) { - if(h->cbp & (1<<4)) - decode_residual_block(h,&h->s.gb,chroma_2dvlc,0, chroma_qp[h->qp], - h->cu,h->c_stride); - if(h->cbp & (1<<5)) - decode_residual_block(h,&h->s.gb,chroma_2dvlc,0, chroma_qp[h->qp], - h->cv,h->c_stride); -} - -static inline int decode_residual_inter(AVSContext *h) { - int block; - - /* get coded block pattern */ - int cbp= get_ue_golomb(&h->s.gb); - if(cbp > 63){ - av_log(h->s.avctx, AV_LOG_ERROR, "illegal inter cbp\n"); - return -1; - } - h->cbp = cbp_tab[cbp][1]; - - /* get quantizer */ - if(h->cbp && !h->qp_fixed) - h->qp = (h->qp + get_se_golomb(&h->s.gb)) & 63; - for(block=0;block<4;block++) - if(h->cbp & (1<<block)) - decode_residual_block(h,&h->s.gb,inter_2dvlc,0,h->qp, - h->cy + h->luma_scan[block], h->l_stride); - decode_residual_chroma(h); - - return 0; -} - -/***************************************************************************** - * - * macroblock level - * - ****************************************************************************/ - -/** - * initialise predictors for motion vectors and intra prediction - */ -static inline void 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; - } - /* set pointer for co-located macroblock type */ - h->col_type = &h->col_type_base[h->mby*h->mb_width + h->mbx]; -} - -static inline void check_for_slice(AVSContext *h); - -/** - * save predictors for later macroblocks and increase - * macroblock address - * @returns 0 if end of frame is reached, 1 otherwise - */ -static inline int 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] = 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; -} - -static int decode_mb_i(AVSContext *h, int cbp_code) { - GetBitContext *gb = &h->s.gb; - int block, pred_mode_uv; - uint8_t top[18]; - uint8_t *left = NULL; - uint8_t *d; - - init_mb(h); - - /* get intra prediction modes from stream */ - for(block=0;block<4;block++) { - int nA,nB,predpred; - int pos = scan3x3[block]; - - nA = h->pred_mode_Y[pos-1]; - nB = h->pred_mode_Y[pos-3]; - predpred = FFMIN(nA,nB); - if(predpred == NOT_AVAIL) // if either is not available - predpred = INTRA_L_LP; - if(!get_bits1(gb)){ - int rem_mode= get_bits(gb, 2); - predpred = rem_mode + (rem_mode >= predpred); - } - h->pred_mode_Y[pos] = predpred; - } - pred_mode_uv = get_ue_golomb(gb); - if(pred_mode_uv > 6) { - av_log(h->s.avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n"); - return -1; - } - - /* 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 ); - } - - /* get coded block pattern */ - if(h->pic_type == FF_I_TYPE) - cbp_code = get_ue_golomb(gb); - if(cbp_code > 63){ - av_log(h->s.avctx, AV_LOG_ERROR, "illegal intra cbp\n"); - return -1; - } - h->cbp = cbp_tab[cbp_code][0]; - if(h->cbp && !h->qp_fixed) - h->qp = (h->qp + get_se_golomb(gb)) & 63; //qp_delta - - /* luma intra prediction interleaved with residual decode/transform/add */ - for(block=0;block<4;block++) { - d = h->cy + h->luma_scan[block]; - load_intra_pred_luma(h, top, &left, block); - h->intra_pred_l[h->pred_mode_Y[scan3x3[block]]] - (d, top, left, h->l_stride); - if(h->cbp & (1<<block)) - decode_residual_block(h,gb,intra_2dvlc,1,h->qp,d,h->l_stride); - } - - /* chroma intra prediction */ - /* 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]; - } - h->intra_pred_c[pred_mode_uv](h->cu, &h->top_border_u[h->mbx*10], - h->left_border_u, h->c_stride); - h->intra_pred_c[pred_mode_uv](h->cv, &h->top_border_v[h->mbx*10], - h->left_border_v, h->c_stride); - - decode_residual_chroma(h); - filter_mb(h,I_8X8); - - /* mark motion vectors as intra */ - h->mv[MV_FWD_X0] = intra_mv; - set_mvs(&h->mv[MV_FWD_X0], BLK_16X16); - h->mv[MV_BWD_X0] = intra_mv; - set_mvs(&h->mv[MV_BWD_X0], BLK_16X16); - if(h->pic_type != FF_B_TYPE) - *h->col_type = I_8X8; - - return 0; -} - -static void decode_mb_p(AVSContext *h, enum mb_t mb_type) { - GetBitContext *gb = &h->s.gb; - int ref[4]; - - init_mb(h); - switch(mb_type) { - case P_SKIP: - mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP, BLK_16X16, 0); - break; - case P_16X16: - ref[0] = h->ref_flag ? 0 : get_bits1(gb); - mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16,ref[0]); - break; - case P_16X8: - ref[0] = h->ref_flag ? 0 : get_bits1(gb); - ref[2] = h->ref_flag ? 0 : get_bits1(gb); - mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, ref[0]); - mv_pred(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, ref[2]); - break; - case P_8X16: - ref[0] = h->ref_flag ? 0 : get_bits1(gb); - ref[1] = h->ref_flag ? 0 : get_bits1(gb); - mv_pred(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, ref[0]); - mv_pred(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, ref[1]); - break; - case P_8X8: - ref[0] = h->ref_flag ? 0 : get_bits1(gb); - ref[1] = h->ref_flag ? 0 : get_bits1(gb); - ref[2] = h->ref_flag ? 0 : get_bits1(gb); - ref[3] = h->ref_flag ? 0 : get_bits1(gb); - mv_pred(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_MEDIAN, BLK_8X8, ref[0]); - mv_pred(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_MEDIAN, BLK_8X8, ref[1]); - mv_pred(h, MV_FWD_X2, MV_FWD_X1, MV_PRED_MEDIAN, BLK_8X8, ref[2]); - mv_pred(h, MV_FWD_X3, MV_FWD_X0, MV_PRED_MEDIAN, BLK_8X8, ref[3]); - } - inter_pred(h, mb_type); - store_mvs(h); - if(mb_type != P_SKIP) - decode_residual_inter(h); - filter_mb(h,mb_type); - *h->col_type = mb_type; -} - -static void decode_mb_b(AVSContext *h, enum mb_t mb_type) { - int block; - enum sub_mb_t sub_type[4]; - int flags; - - init_mb(h); - - /* reset all MVs */ - h->mv[MV_FWD_X0] = dir_mv; - set_mvs(&h->mv[MV_FWD_X0], BLK_16X16); - h->mv[MV_BWD_X0] = dir_mv; - set_mvs(&h->mv[MV_BWD_X0], BLK_16X16); - switch(mb_type) { - case B_SKIP: - case B_DIRECT: - if(!(*h->col_type)) { - /* intra MB at co-location, do in-plane prediction */ - mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_16X16, 1); - mv_pred(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_BSKIP, BLK_16X16, 0); - } else - /* direct prediction from co-located P MB, block-wise */ - for(block=0;block<4;block++) - mv_pred_direct(h,&h->mv[mv_scan[block]], - &h->col_mv[(h->mby*h->mb_width+h->mbx)*4 + block]); - break; - case B_FWD_16X16: - mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1); - break; - case B_SYM_16X16: - mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1); - mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X16); - break; - case B_BWD_16X16: - mv_pred(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_MEDIAN, BLK_16X16, 0); - break; - case B_8X8: - for(block=0;block<4;block++) - sub_type[block] = get_bits(&h->s.gb,2); - for(block=0;block<4;block++) { - switch(sub_type[block]) { - case B_SUB_DIRECT: - if(!(*h->col_type)) { - /* intra MB at co-location, do in-plane prediction */ - mv_pred(h, mv_scan[block], mv_scan[block]-3, - MV_PRED_BSKIP, BLK_8X8, 1); - mv_pred(h, mv_scan[block]+MV_BWD_OFFS, - mv_scan[block]-3+MV_BWD_OFFS, - MV_PRED_BSKIP, BLK_8X8, 0); - } else - mv_pred_direct(h,&h->mv[mv_scan[block]], - &h->col_mv[(h->mby*h->mb_width + h->mbx)*4 + block]); - break; - case B_SUB_FWD: - mv_pred(h, mv_scan[block], mv_scan[block]-3, - MV_PRED_MEDIAN, BLK_8X8, 1); - break; - case B_SUB_SYM: - mv_pred(h, mv_scan[block], mv_scan[block]-3, - MV_PRED_MEDIAN, BLK_8X8, 1); - mv_pred_sym(h, &h->mv[mv_scan[block]], BLK_8X8); - break; - } - } - for(block=0;block<4;block++) { - if(sub_type[block] == B_SUB_BWD) - mv_pred(h, mv_scan[block]+MV_BWD_OFFS, - mv_scan[block]+MV_BWD_OFFS-3, - MV_PRED_MEDIAN, BLK_8X8, 0); - } - break; - default: - assert((mb_type > B_SYM_16X16) && (mb_type < B_8X8)); - flags = partition_flags[mb_type]; - if(mb_type & 1) { /* 16x8 macroblock types */ - if(flags & FWD0) - mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, 1); - if(flags & SYM0) - mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X8); - if(flags & FWD1) - mv_pred(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, 1); - if(flags & SYM1) - mv_pred_sym(h, &h->mv[MV_FWD_X2], BLK_16X8); - if(flags & BWD0) - mv_pred(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_TOP, BLK_16X8, 0); - if(flags & BWD1) - mv_pred(h, MV_BWD_X2, MV_BWD_A1, MV_PRED_LEFT, BLK_16X8, 0); - } else { /* 8x16 macroblock types */ - if(flags & FWD0) - mv_pred(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, 1); - if(flags & SYM0) - mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_8X16); - if(flags & FWD1) - mv_pred(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT,BLK_8X16, 1); - if(flags & SYM1) - mv_pred_sym(h, &h->mv[MV_FWD_X1], BLK_8X16); - if(flags & BWD0) - mv_pred(h, MV_BWD_X0, MV_BWD_B3, MV_PRED_LEFT, BLK_8X16, 0); - if(flags & BWD1) - mv_pred(h, MV_BWD_X1, MV_BWD_C2, MV_PRED_TOPRIGHT,BLK_8X16, 0); - } - } - inter_pred(h, mb_type); - if(mb_type != B_SKIP) - decode_residual_inter(h); - filter_mb(h,mb_type); -} - -/***************************************************************************** - * - * slice level - * - ****************************************************************************/ - -static inline int decode_slice_header(AVSContext *h, GetBitContext *gb) { - if(h->stc > 0xAF) - av_log(h->s.avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc); - h->mby = h->stc; - if((h->mby == 0) && (!h->qp_fixed)){ - h->qp_fixed = get_bits1(gb); - h->qp = get_bits(gb,6); - } - /* inter frame or second slice can have weighting params */ - if((h->pic_type != FF_I_TYPE) || (!h->pic_structure && h->mby >= h->mb_width/2)) - if(get_bits1(gb)) { //slice_weighting_flag - av_log(h->s.avctx, AV_LOG_ERROR, - "weighted prediction not yet supported\n"); - } - return 0; -} - -static inline void check_for_slice(AVSContext *h) { - GetBitContext *gb = &h->s.gb; - int align; - align = (-get_bits_count(gb)) & 7; - if((show_bits_long(gb,24+align) & 0xFFFFFF) == 0x000001) { - get_bits_long(gb,24+align); - h->stc = get_bits(gb,8); - decode_slice_header(h,gb); - } -} - -/***************************************************************************** - * - * frame level - * - ****************************************************************************/ - -static void 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] = dir_mv; - set_mvs(&h->mv[MV_BWD_X0], BLK_16X16); - h->mv[MV_FWD_X0] = 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; -} - -static int decode_pic(AVSContext *h) { - MpegEncContext *s = &h->s; - int skip_count; - enum mb_t mb_type; - - if (!s->context_initialized) { - s->avctx->idct_algo = FF_IDCT_CAVS; - if (MPV_common_init(s) < 0) - return -1; - ff_init_scantable(s->dsp.idct_permutation,&h->scantable,ff_zigzag_direct); - } - get_bits(&s->gb,16);//bbv_dwlay - if(h->stc == PIC_PB_START_CODE) { - h->pic_type = get_bits(&s->gb,2) + FF_I_TYPE; - if(h->pic_type > FF_B_TYPE) { - av_log(s->avctx, AV_LOG_ERROR, "illegal picture type\n"); - return -1; - } - /* make sure we have the reference frames we need */ - if(!h->DPB[0].data[0] || - (!h->DPB[1].data[0] && h->pic_type == FF_B_TYPE)) - return -1; - } else { - h->pic_type = FF_I_TYPE; - if(get_bits1(&s->gb)) - get_bits(&s->gb,16);//time_code - } - /* release last B frame */ - if(h->picture.data[0]) - s->avctx->release_buffer(s->avctx, (AVFrame *)&h->picture); - - s->avctx->get_buffer(s->avctx, (AVFrame *)&h->picture); - init_pic(h); - h->picture.poc = get_bits(&s->gb,8)*2; - - /* get temporal distances and MV scaling factors */ - if(h->pic_type != FF_B_TYPE) { - h->dist[0] = (h->picture.poc - h->DPB[0].poc + 512) % 512; - } else { - h->dist[0] = (h->DPB[0].poc - h->picture.poc + 512) % 512; - } - h->dist[1] = (h->picture.poc - h->DPB[1].poc + 512) % 512; - h->scale_den[0] = h->dist[0] ? 512/h->dist[0] : 0; - h->scale_den[1] = h->dist[1] ? 512/h->dist[1] : 0; - if(h->pic_type == FF_B_TYPE) { - h->sym_factor = h->dist[0]*h->scale_den[1]; - } else { - h->direct_den[0] = h->dist[0] ? 16384/h->dist[0] : 0; - h->direct_den[1] = h->dist[1] ? 16384/h->dist[1] : 0; - } - - if(s->low_delay) - get_ue_golomb(&s->gb); //bbv_check_times - h->progressive = get_bits1(&s->gb); - if(h->progressive) - h->pic_structure = 1; - else if(!(h->pic_structure = get_bits1(&s->gb) && (h->stc == PIC_PB_START_CODE)) ) - get_bits1(&s->gb); //advanced_pred_mode_disable - skip_bits1(&s->gb); //top_field_first - skip_bits1(&s->gb); //repeat_first_field - h->qp_fixed = get_bits1(&s->gb); - h->qp = get_bits(&s->gb,6); - if(h->pic_type == FF_I_TYPE) { - if(!h->progressive && !h->pic_structure) - skip_bits1(&s->gb);//what is this? - skip_bits(&s->gb,4); //reserved bits - } else { - if(!(h->pic_type == FF_B_TYPE && h->pic_structure == 1)) - h->ref_flag = get_bits1(&s->gb); - skip_bits(&s->gb,4); //reserved bits - h->skip_mode_flag = get_bits1(&s->gb); - } - h->loop_filter_disable = get_bits1(&s->gb); - if(!h->loop_filter_disable && get_bits1(&s->gb)) { - h->alpha_offset = get_se_golomb(&s->gb); - h->beta_offset = get_se_golomb(&s->gb); - } else { - h->alpha_offset = h->beta_offset = 0; - } - check_for_slice(h); - if(h->pic_type == FF_I_TYPE) { - do { - decode_mb_i(h, 0); - } while(next_mb(h)); - } else if(h->pic_type == FF_P_TYPE) { - do { - if(h->skip_mode_flag) { - skip_count = get_ue_golomb(&s->gb); - while(skip_count--) { - decode_mb_p(h,P_SKIP); - if(!next_mb(h)) - goto done; - } - mb_type = get_ue_golomb(&s->gb) + P_16X16; - } else - mb_type = get_ue_golomb(&s->gb) + P_SKIP; - if(mb_type > P_8X8) { - decode_mb_i(h, mb_type - P_8X8 - 1); - } else - decode_mb_p(h,mb_type); - } while(next_mb(h)); - } else { /* FF_B_TYPE */ - do { - if(h->skip_mode_flag) { - skip_count = get_ue_golomb(&s->gb); - while(skip_count--) { - decode_mb_b(h,B_SKIP); - if(!next_mb(h)) - goto done; - } - mb_type = get_ue_golomb(&s->gb) + B_DIRECT; - } else - mb_type = get_ue_golomb(&s->gb) + B_SKIP; - if(mb_type > B_8X8) { - decode_mb_i(h, mb_type - B_8X8 - 1); - } else - decode_mb_b(h,mb_type); - } while(next_mb(h)); - } - done: - if(h->pic_type != FF_B_TYPE) { - if(h->DPB[1].data[0]) - s->avctx->release_buffer(s->avctx, (AVFrame *)&h->DPB[1]); - memcpy(&h->DPB[1], &h->DPB[0], sizeof(Picture)); - memcpy(&h->DPB[0], &h->picture, sizeof(Picture)); - memset(&h->picture,0,sizeof(Picture)); - } - return 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 - */ -static void 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)); -} - -static int decode_seq_header(AVSContext *h) { - MpegEncContext *s = &h->s; - extern const AVRational ff_frame_rate_tab[]; - int frame_rate_code; - - h->profile = get_bits(&s->gb,8); - h->level = get_bits(&s->gb,8); - skip_bits1(&s->gb); //progressive sequence - s->width = get_bits(&s->gb,14); - s->height = get_bits(&s->gb,14); - skip_bits(&s->gb,2); //chroma format - skip_bits(&s->gb,3); //sample_precision - h->aspect_ratio = get_bits(&s->gb,4); - frame_rate_code = get_bits(&s->gb,4); - skip_bits(&s->gb,18);//bit_rate_lower - skip_bits1(&s->gb); //marker_bit - skip_bits(&s->gb,12);//bit_rate_upper - s->low_delay = get_bits1(&s->gb); - h->mb_width = (s->width + 15) >> 4; - h->mb_height = (s->height + 15) >> 4; - h->s.avctx->time_base.den = ff_frame_rate_tab[frame_rate_code].num; - h->s.avctx->time_base.num = ff_frame_rate_tab[frame_rate_code].den; - h->s.avctx->width = s->width; - h->s.avctx->height = s->height; - if(!h->top_qp) - init_top_lines(h); - return 0; -} - -static void cavs_flush(AVCodecContext * avctx) { - AVSContext *h = avctx->priv_data; - h->got_keyframe = 0; -} - -static int cavs_decode_frame(AVCodecContext * avctx,void *data, int *data_size, - uint8_t * buf, int buf_size) { - AVSContext *h = avctx->priv_data; - MpegEncContext *s = &h->s; - int input_size; - const uint8_t *buf_end; - const uint8_t *buf_ptr; - AVFrame *picture = data; - uint32_t stc; - - s->avctx = avctx; - - if (buf_size == 0) { - if(!s->low_delay && h->DPB[0].data[0]) { - *data_size = sizeof(AVPicture); - *picture = *(AVFrame *) &h->DPB[0]; - } - return 0; - } - - buf_ptr = buf; - buf_end = buf + buf_size; - for(;;) { - buf_ptr = ff_find_start_code(buf_ptr,buf_end, &stc); - if(stc & 0xFFFFFE00) - return FFMAX(0, buf_ptr - buf - s->parse_context.last_index); - input_size = (buf_end - buf_ptr)*8; - switch(stc) { - case SEQ_START_CODE: - init_get_bits(&s->gb, buf_ptr, input_size); - decode_seq_header(h); - break; - case PIC_I_START_CODE: - if(!h->got_keyframe) { - if(h->DPB[0].data[0]) - avctx->release_buffer(avctx, (AVFrame *)&h->DPB[0]); - if(h->DPB[1].data[0]) - avctx->release_buffer(avctx, (AVFrame *)&h->DPB[1]); - h->got_keyframe = 1; - } - case PIC_PB_START_CODE: - *data_size = 0; - if(!h->got_keyframe) - break; - init_get_bits(&s->gb, buf_ptr, input_size); - h->stc = stc; - if(decode_pic(h)) - break; - *data_size = sizeof(AVPicture); - if(h->pic_type != FF_B_TYPE) { - if(h->DPB[1].data[0]) { - *picture = *(AVFrame *) &h->DPB[1]; - } else { - *data_size = 0; - } - } else - *picture = *(AVFrame *) &h->picture; - break; - case EXT_START_CODE: - //mpeg_decode_extension(avctx,buf_ptr, input_size); - break; - case USER_START_CODE: - //mpeg_decode_user_data(avctx,buf_ptr, input_size); - break; - default: - if (stc >= SLICE_MIN_START_CODE && - stc <= SLICE_MAX_START_CODE) { - init_get_bits(&s->gb, buf_ptr, input_size); - decode_slice_header(h, &s->gb); - } - break; - } - } -} - -static int cavs_decode_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] = un_mv; - h->mv[19] = un_mv; - return 0; -} - -static int cavs_decode_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; -} - -AVCodec cavs_decoder = { - "cavs", - CODEC_TYPE_VIDEO, - CODEC_ID_CAVS, - sizeof(AVSContext), - cavs_decode_init, - NULL, - cavs_decode_end, - cavs_decode_frame, - CODEC_CAP_DR1 | CODEC_CAP_DELAY, - .flush= cavs_flush, -}; -#endif /* CONFIG_CAVS_DECODER */ - -#ifdef CONFIG_CAVSVIDEO_PARSER -/** - * finds the end of the current frame in the bitstream. - * @return the position of the first byte of the next frame, or -1 - */ -static int cavs_find_frame_end(ParseContext *pc, const uint8_t *buf, - int buf_size) { - int pic_found, i; - uint32_t state; - - pic_found= pc->frame_start_found; - state= pc->state; - - i=0; - if(!pic_found){ - for(i=0; i<buf_size; i++){ - state= (state<<8) | buf[i]; - if(state == PIC_I_START_CODE || state == PIC_PB_START_CODE){ - i++; - pic_found=1; - break; - } - } - } - - if(pic_found){ - /* EOF considered as end of frame */ - if (buf_size == 0) - return 0; - for(; i<buf_size; i++){ - state= (state<<8) | buf[i]; - if((state&0xFFFFFF00) == 0x100){ - if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){ - pc->frame_start_found=0; - pc->state=-1; - return i-3; - } - } - } - } - pc->frame_start_found= pic_found; - pc->state= state; - return END_NOT_FOUND; -} - -static int cavsvideo_parse(AVCodecParserContext *s, - AVCodecContext *avctx, - uint8_t **poutbuf, int *poutbuf_size, - const uint8_t *buf, int buf_size) -{ - ParseContext *pc = s->priv_data; - int next; - - if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){ - next= buf_size; - }else{ - next= cavs_find_frame_end(pc, buf, buf_size); - - if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) { - *poutbuf = NULL; - *poutbuf_size = 0; - return buf_size; - } - } - *poutbuf = (uint8_t *)buf; - *poutbuf_size = buf_size; - return next; -} - -AVCodecParser cavsvideo_parser = { - { CODEC_ID_CAVS }, - sizeof(ParseContext1), - NULL, - cavsvideo_parse, - ff_parse1_close, - ff_mpeg4video_split, -}; -#endif /* CONFIG_CAVSVIDEO_PARSER */ |