/* * H.263/MPEG-4 backend for encoder and decoder * Copyright (c) 2000,2001 Fabrice Bellard * H.263+ support. * Copyright (c) 2001 Juan J. Sierralta P * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> * * 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 * H.263/MPEG-4 codec. */ #include "libavutil/thread.h" #include "mpegvideo.h" #include "h263.h" #include "h263data.h" #include "h263dsp.h" #include "idctdsp.h" #include "mathops.h" #include "mpegpicture.h" #include "mpegutils.h" #include "rl.h" static av_cold void h263_init_rl_inter(void) { static uint8_t h263_rl_inter_table[2][2 * MAX_RUN + MAX_LEVEL + 3]; ff_rl_init(&ff_h263_rl_inter, h263_rl_inter_table); } av_cold void ff_h263_init_rl_inter(void) { static AVOnce init_static_once = AV_ONCE_INIT; ff_thread_once(&init_static_once, h263_init_rl_inter); } void ff_h263_update_motion_val(MpegEncContext * s){ const int mb_xy = s->mb_y * s->mb_stride + s->mb_x; //FIXME a lot of that is only needed for !low_delay const int wrap = s->b8_stride; const int xy = s->block_index[0]; s->current_picture.mbskip_table[mb_xy] = s->mb_skipped; if(s->mv_type != MV_TYPE_8X8){ int motion_x, motion_y; if (s->mb_intra) { motion_x = 0; motion_y = 0; } else if (s->mv_type == MV_TYPE_16X16) { motion_x = s->mv[0][0][0]; motion_y = s->mv[0][0][1]; } else /*if (s->mv_type == MV_TYPE_FIELD)*/ { int i; motion_x = s->mv[0][0][0] + s->mv[0][1][0]; motion_y = s->mv[0][0][1] + s->mv[0][1][1]; motion_x = (motion_x>>1) | (motion_x&1); for(i=0; i<2; i++){ s->p_field_mv_table[i][0][mb_xy][0]= s->mv[0][i][0]; s->p_field_mv_table[i][0][mb_xy][1]= s->mv[0][i][1]; } s->current_picture.ref_index[0][4*mb_xy ] = s->current_picture.ref_index[0][4*mb_xy + 1] = s->field_select[0][0]; s->current_picture.ref_index[0][4*mb_xy + 2] = s->current_picture.ref_index[0][4*mb_xy + 3] = s->field_select[0][1]; } /* no update if 8X8 because it has been done during parsing */ s->current_picture.motion_val[0][xy][0] = motion_x; s->current_picture.motion_val[0][xy][1] = motion_y; s->current_picture.motion_val[0][xy + 1][0] = motion_x; s->current_picture.motion_val[0][xy + 1][1] = motion_y; s->current_picture.motion_val[0][xy + wrap][0] = motion_x; s->current_picture.motion_val[0][xy + wrap][1] = motion_y; s->current_picture.motion_val[0][xy + 1 + wrap][0] = motion_x; s->current_picture.motion_val[0][xy + 1 + wrap][1] = motion_y; } if(s->encoding){ //FIXME encoding MUST be cleaned up if (s->mv_type == MV_TYPE_8X8) s->current_picture.mb_type[mb_xy] = MB_TYPE_L0 | MB_TYPE_8x8; else if(s->mb_intra) s->current_picture.mb_type[mb_xy] = MB_TYPE_INTRA; else s->current_picture.mb_type[mb_xy] = MB_TYPE_L0 | MB_TYPE_16x16; } } void ff_h263_loop_filter(MpegEncContext * s){ int qp_c; const int linesize = s->linesize; const int uvlinesize= s->uvlinesize; const int xy = s->mb_y * s->mb_stride + s->mb_x; uint8_t *dest_y = s->dest[0]; uint8_t *dest_cb= s->dest[1]; uint8_t *dest_cr= s->dest[2]; /* Diag Top Left Center */ if (!IS_SKIP(s->current_picture.mb_type[xy])) { qp_c= s->qscale; s->h263dsp.h263_v_loop_filter(dest_y + 8 * linesize, linesize, qp_c); s->h263dsp.h263_v_loop_filter(dest_y + 8 * linesize + 8, linesize, qp_c); }else qp_c= 0; if(s->mb_y){ int qp_dt, qp_tt, qp_tc; if (IS_SKIP(s->current_picture.mb_type[xy - s->mb_stride])) qp_tt=0; else qp_tt = s->current_picture.qscale_table[xy - s->mb_stride]; if(qp_c) qp_tc= qp_c; else qp_tc= qp_tt; if(qp_tc){ const int chroma_qp= s->chroma_qscale_table[qp_tc]; s->h263dsp.h263_v_loop_filter(dest_y, linesize, qp_tc); s->h263dsp.h263_v_loop_filter(dest_y + 8, linesize, qp_tc); s->h263dsp.h263_v_loop_filter(dest_cb, uvlinesize, chroma_qp); s->h263dsp.h263_v_loop_filter(dest_cr, uvlinesize, chroma_qp); } if(qp_tt) s->h263dsp.h263_h_loop_filter(dest_y - 8 * linesize + 8, linesize, qp_tt); if(s->mb_x){ if (qp_tt || IS_SKIP(s->current_picture.mb_type[xy - 1 - s->mb_stride])) qp_dt= qp_tt; else qp_dt = s->current_picture.qscale_table[xy - 1 - s->mb_stride]; if(qp_dt){ const int chroma_qp= s->chroma_qscale_table[qp_dt]; s->h263dsp.h263_h_loop_filter(dest_y - 8 * linesize, linesize, qp_dt); s->h263dsp.h263_h_loop_filter(dest_cb - 8 * uvlinesize, uvlinesize, chroma_qp); s->h263dsp.h263_h_loop_filter(dest_cr - 8 * uvlinesize, uvlinesize, chroma_qp); } } } if(qp_c){ s->h263dsp.h263_h_loop_filter(dest_y + 8, linesize, qp_c); if(s->mb_y + 1 == s->mb_height) s->h263dsp.h263_h_loop_filter(dest_y + 8 * linesize + 8, linesize, qp_c); } if(s->mb_x){ int qp_lc; if (qp_c || IS_SKIP(s->current_picture.mb_type[xy - 1])) qp_lc= qp_c; else qp_lc = s->current_picture.qscale_table[xy - 1]; if(qp_lc){ s->h263dsp.h263_h_loop_filter(dest_y, linesize, qp_lc); if(s->mb_y + 1 == s->mb_height){ const int chroma_qp= s->chroma_qscale_table[qp_lc]; s->h263dsp.h263_h_loop_filter(dest_y + 8 * linesize, linesize, qp_lc); s->h263dsp.h263_h_loop_filter(dest_cb, uvlinesize, chroma_qp); s->h263dsp.h263_h_loop_filter(dest_cr, uvlinesize, chroma_qp); } } } } int16_t *ff_h263_pred_motion(MpegEncContext * s, int block, int dir, int *px, int *py) { int wrap; int16_t *A, *B, *C, (*mot_val)[2]; static const int off[4]= {2, 1, 1, -1}; wrap = s->b8_stride; mot_val = s->current_picture.motion_val[dir] + s->block_index[block]; A = mot_val[ - 1]; /* special case for first (slice) line */ if (s->first_slice_line && block<3) { // we can't just change some MVs to simulate that as we need them for the B-frames (and ME) // and if we ever support non rectangular objects than we need to do a few ifs here anyway :( if(block==0){ //most common case if(s->mb_x == s->resync_mb_x){ //rare *px= *py = 0; }else if(s->mb_x + 1 == s->resync_mb_x && s->h263_pred){ //rare C = mot_val[off[block] - wrap]; if(s->mb_x==0){ *px = C[0]; *py = C[1]; }else{ *px = mid_pred(A[0], 0, C[0]); *py = mid_pred(A[1], 0, C[1]); } }else{ *px = A[0]; *py = A[1]; } }else if(block==1){ if(s->mb_x + 1 == s->resync_mb_x && s->h263_pred){ //rare C = mot_val[off[block] - wrap]; *px = mid_pred(A[0], 0, C[0]); *py = mid_pred(A[1], 0, C[1]); }else{ *px = A[0]; *py = A[1]; } }else{ /* block==2*/ B = mot_val[ - wrap]; C = mot_val[off[block] - wrap]; if(s->mb_x == s->resync_mb_x) //rare A[0]=A[1]=0; *px = mid_pred(A[0], B[0], C[0]); *py = mid_pred(A[1], B[1], C[1]); } } else { B = mot_val[ - wrap]; C = mot_val[off[block] - wrap]; *px = mid_pred(A[0], B[0], C[0]); *py = mid_pred(A[1], B[1], C[1]); } return *mot_val; }