yading@10: /* yading@10: * H263/MPEG4 backend for encoder and decoder yading@10: * Copyright (c) 2000,2001 Fabrice Bellard yading@10: * H263+ support. yading@10: * Copyright (c) 2001 Juan J. Sierralta P yading@10: * Copyright (c) 2002-2004 Michael Niedermayer yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: /** yading@10: * @file yading@10: * h263/mpeg4 codec. yading@10: */ yading@10: yading@10: //#define DEBUG yading@10: #include yading@10: yading@10: #include "avcodec.h" yading@10: #include "mpegvideo.h" yading@10: #include "h263.h" yading@10: #include "h263data.h" yading@10: #include "mathops.h" yading@10: #include "unary.h" yading@10: #include "flv.h" yading@10: #include "mpeg4video.h" yading@10: yading@10: //#undef NDEBUG yading@10: //#include yading@10: yading@10: uint8_t ff_h263_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3]; yading@10: yading@10: yading@10: void ff_h263_update_motion_val(MpegEncContext * s){ yading@10: const int mb_xy = s->mb_y * s->mb_stride + s->mb_x; yading@10: //FIXME a lot of that is only needed for !low_delay yading@10: const int wrap = s->b8_stride; yading@10: const int xy = s->block_index[0]; yading@10: yading@10: s->current_picture.mbskip_table[mb_xy] = s->mb_skipped; yading@10: yading@10: if(s->mv_type != MV_TYPE_8X8){ yading@10: int motion_x, motion_y; yading@10: if (s->mb_intra) { yading@10: motion_x = 0; yading@10: motion_y = 0; yading@10: } else if (s->mv_type == MV_TYPE_16X16) { yading@10: motion_x = s->mv[0][0][0]; yading@10: motion_y = s->mv[0][0][1]; yading@10: } else /*if (s->mv_type == MV_TYPE_FIELD)*/ { yading@10: int i; yading@10: motion_x = s->mv[0][0][0] + s->mv[0][1][0]; yading@10: motion_y = s->mv[0][0][1] + s->mv[0][1][1]; yading@10: motion_x = (motion_x>>1) | (motion_x&1); yading@10: for(i=0; i<2; i++){ yading@10: s->p_field_mv_table[i][0][mb_xy][0]= s->mv[0][i][0]; yading@10: s->p_field_mv_table[i][0][mb_xy][1]= s->mv[0][i][1]; yading@10: } yading@10: s->current_picture.ref_index[0][4*mb_xy ] = yading@10: s->current_picture.ref_index[0][4*mb_xy + 1] = s->field_select[0][0]; yading@10: s->current_picture.ref_index[0][4*mb_xy + 2] = yading@10: s->current_picture.ref_index[0][4*mb_xy + 3] = s->field_select[0][1]; yading@10: } yading@10: yading@10: /* no update if 8X8 because it has been done during parsing */ yading@10: s->current_picture.motion_val[0][xy][0] = motion_x; yading@10: s->current_picture.motion_val[0][xy][1] = motion_y; yading@10: s->current_picture.motion_val[0][xy + 1][0] = motion_x; yading@10: s->current_picture.motion_val[0][xy + 1][1] = motion_y; yading@10: s->current_picture.motion_val[0][xy + wrap][0] = motion_x; yading@10: s->current_picture.motion_val[0][xy + wrap][1] = motion_y; yading@10: s->current_picture.motion_val[0][xy + 1 + wrap][0] = motion_x; yading@10: s->current_picture.motion_val[0][xy + 1 + wrap][1] = motion_y; yading@10: } yading@10: yading@10: if(s->encoding){ //FIXME encoding MUST be cleaned up yading@10: if (s->mv_type == MV_TYPE_8X8) yading@10: s->current_picture.mb_type[mb_xy] = MB_TYPE_L0 | MB_TYPE_8x8; yading@10: else if(s->mb_intra) yading@10: s->current_picture.mb_type[mb_xy] = MB_TYPE_INTRA; yading@10: else yading@10: s->current_picture.mb_type[mb_xy] = MB_TYPE_L0 | MB_TYPE_16x16; yading@10: } yading@10: } yading@10: yading@10: int ff_h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr) yading@10: { yading@10: int x, y, wrap, a, c, pred_dc; yading@10: int16_t *dc_val; yading@10: yading@10: /* find prediction */ yading@10: if (n < 4) { yading@10: x = 2 * s->mb_x + (n & 1); yading@10: y = 2 * s->mb_y + ((n & 2) >> 1); yading@10: wrap = s->b8_stride; yading@10: dc_val = s->dc_val[0]; yading@10: } else { yading@10: x = s->mb_x; yading@10: y = s->mb_y; yading@10: wrap = s->mb_stride; yading@10: dc_val = s->dc_val[n - 4 + 1]; yading@10: } yading@10: /* B C yading@10: * A X yading@10: */ yading@10: a = dc_val[(x - 1) + (y) * wrap]; yading@10: c = dc_val[(x) + (y - 1) * wrap]; yading@10: yading@10: /* No prediction outside GOB boundary */ yading@10: if(s->first_slice_line && n!=3){ yading@10: if(n!=2) c= 1024; yading@10: if(n!=1 && s->mb_x == s->resync_mb_x) a= 1024; yading@10: } yading@10: /* just DC prediction */ yading@10: if (a != 1024 && c != 1024) yading@10: pred_dc = (a + c) >> 1; yading@10: else if (a != 1024) yading@10: pred_dc = a; yading@10: else yading@10: pred_dc = c; yading@10: yading@10: /* we assume pred is positive */ yading@10: *dc_val_ptr = &dc_val[x + y * wrap]; yading@10: return pred_dc; yading@10: } yading@10: yading@10: void ff_h263_loop_filter(MpegEncContext * s){ yading@10: int qp_c; yading@10: const int linesize = s->linesize; yading@10: const int uvlinesize= s->uvlinesize; yading@10: const int xy = s->mb_y * s->mb_stride + s->mb_x; yading@10: uint8_t *dest_y = s->dest[0]; yading@10: uint8_t *dest_cb= s->dest[1]; yading@10: uint8_t *dest_cr= s->dest[2]; yading@10: yading@10: // if(s->pict_type==AV_PICTURE_TYPE_B && !s->readable) return; yading@10: yading@10: /* yading@10: Diag Top yading@10: Left Center yading@10: */ yading@10: if (!IS_SKIP(s->current_picture.mb_type[xy])) { yading@10: qp_c= s->qscale; yading@10: s->dsp.h263_v_loop_filter(dest_y+8*linesize , linesize, qp_c); yading@10: s->dsp.h263_v_loop_filter(dest_y+8*linesize+8, linesize, qp_c); yading@10: }else yading@10: qp_c= 0; yading@10: yading@10: if(s->mb_y){ yading@10: int qp_dt, qp_tt, qp_tc; yading@10: yading@10: if (IS_SKIP(s->current_picture.mb_type[xy - s->mb_stride])) yading@10: qp_tt=0; yading@10: else yading@10: qp_tt = s->current_picture.qscale_table[xy - s->mb_stride]; yading@10: yading@10: if(qp_c) yading@10: qp_tc= qp_c; yading@10: else yading@10: qp_tc= qp_tt; yading@10: yading@10: if(qp_tc){ yading@10: const int chroma_qp= s->chroma_qscale_table[qp_tc]; yading@10: s->dsp.h263_v_loop_filter(dest_y , linesize, qp_tc); yading@10: s->dsp.h263_v_loop_filter(dest_y+8, linesize, qp_tc); yading@10: yading@10: s->dsp.h263_v_loop_filter(dest_cb , uvlinesize, chroma_qp); yading@10: s->dsp.h263_v_loop_filter(dest_cr , uvlinesize, chroma_qp); yading@10: } yading@10: yading@10: if(qp_tt) yading@10: s->dsp.h263_h_loop_filter(dest_y-8*linesize+8 , linesize, qp_tt); yading@10: yading@10: if(s->mb_x){ yading@10: if (qp_tt || IS_SKIP(s->current_picture.mb_type[xy - 1 - s->mb_stride])) yading@10: qp_dt= qp_tt; yading@10: else yading@10: qp_dt = s->current_picture.qscale_table[xy - 1 - s->mb_stride]; yading@10: yading@10: if(qp_dt){ yading@10: const int chroma_qp= s->chroma_qscale_table[qp_dt]; yading@10: s->dsp.h263_h_loop_filter(dest_y -8*linesize , linesize, qp_dt); yading@10: s->dsp.h263_h_loop_filter(dest_cb-8*uvlinesize, uvlinesize, chroma_qp); yading@10: s->dsp.h263_h_loop_filter(dest_cr-8*uvlinesize, uvlinesize, chroma_qp); yading@10: } yading@10: } yading@10: } yading@10: yading@10: if(qp_c){ yading@10: s->dsp.h263_h_loop_filter(dest_y +8, linesize, qp_c); yading@10: if(s->mb_y + 1 == s->mb_height) yading@10: s->dsp.h263_h_loop_filter(dest_y+8*linesize+8, linesize, qp_c); yading@10: } yading@10: yading@10: if(s->mb_x){ yading@10: int qp_lc; yading@10: if (qp_c || IS_SKIP(s->current_picture.mb_type[xy - 1])) yading@10: qp_lc= qp_c; yading@10: else yading@10: qp_lc = s->current_picture.qscale_table[xy - 1]; yading@10: yading@10: if(qp_lc){ yading@10: s->dsp.h263_h_loop_filter(dest_y, linesize, qp_lc); yading@10: if(s->mb_y + 1 == s->mb_height){ yading@10: const int chroma_qp= s->chroma_qscale_table[qp_lc]; yading@10: s->dsp.h263_h_loop_filter(dest_y +8* linesize, linesize, qp_lc); yading@10: s->dsp.h263_h_loop_filter(dest_cb , uvlinesize, chroma_qp); yading@10: s->dsp.h263_h_loop_filter(dest_cr , uvlinesize, chroma_qp); yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: void ff_h263_pred_acdc(MpegEncContext * s, int16_t *block, int n) yading@10: { yading@10: int x, y, wrap, a, c, pred_dc, scale, i; yading@10: int16_t *dc_val, *ac_val, *ac_val1; yading@10: yading@10: /* find prediction */ yading@10: if (n < 4) { yading@10: x = 2 * s->mb_x + (n & 1); yading@10: y = 2 * s->mb_y + (n>> 1); yading@10: wrap = s->b8_stride; yading@10: dc_val = s->dc_val[0]; yading@10: ac_val = s->ac_val[0][0]; yading@10: scale = s->y_dc_scale; yading@10: } else { yading@10: x = s->mb_x; yading@10: y = s->mb_y; yading@10: wrap = s->mb_stride; yading@10: dc_val = s->dc_val[n - 4 + 1]; yading@10: ac_val = s->ac_val[n - 4 + 1][0]; yading@10: scale = s->c_dc_scale; yading@10: } yading@10: yading@10: ac_val += ((y) * wrap + (x)) * 16; yading@10: ac_val1 = ac_val; yading@10: yading@10: /* B C yading@10: * A X yading@10: */ yading@10: a = dc_val[(x - 1) + (y) * wrap]; yading@10: c = dc_val[(x) + (y - 1) * wrap]; yading@10: yading@10: /* No prediction outside GOB boundary */ yading@10: if(s->first_slice_line && n!=3){ yading@10: if(n!=2) c= 1024; yading@10: if(n!=1 && s->mb_x == s->resync_mb_x) a= 1024; yading@10: } yading@10: yading@10: if (s->ac_pred) { yading@10: pred_dc = 1024; yading@10: if (s->h263_aic_dir) { yading@10: /* left prediction */ yading@10: if (a != 1024) { yading@10: ac_val -= 16; yading@10: for(i=1;i<8;i++) { yading@10: block[s->dsp.idct_permutation[i<<3]] += ac_val[i]; yading@10: } yading@10: pred_dc = a; yading@10: } yading@10: } else { yading@10: /* top prediction */ yading@10: if (c != 1024) { yading@10: ac_val -= 16 * wrap; yading@10: for(i=1;i<8;i++) { yading@10: block[s->dsp.idct_permutation[i ]] += ac_val[i + 8]; yading@10: } yading@10: pred_dc = c; yading@10: } yading@10: } yading@10: } else { yading@10: /* just DC prediction */ yading@10: if (a != 1024 && c != 1024) yading@10: pred_dc = (a + c) >> 1; yading@10: else if (a != 1024) yading@10: pred_dc = a; yading@10: else yading@10: pred_dc = c; yading@10: } yading@10: yading@10: /* we assume pred is positive */ yading@10: block[0]=block[0]*scale + pred_dc; yading@10: yading@10: if (block[0] < 0) yading@10: block[0] = 0; yading@10: else yading@10: block[0] |= 1; yading@10: yading@10: /* Update AC/DC tables */ yading@10: dc_val[(x) + (y) * wrap] = block[0]; yading@10: yading@10: /* left copy */ yading@10: for(i=1;i<8;i++) yading@10: ac_val1[i ] = block[s->dsp.idct_permutation[i<<3]]; yading@10: /* top copy */ yading@10: for(i=1;i<8;i++) yading@10: ac_val1[8 + i] = block[s->dsp.idct_permutation[i ]]; yading@10: } yading@10: yading@10: int16_t *ff_h263_pred_motion(MpegEncContext * s, int block, int dir, yading@10: int *px, int *py) yading@10: { yading@10: int wrap; yading@10: int16_t *A, *B, *C, (*mot_val)[2]; yading@10: static const int off[4]= {2, 1, 1, -1}; yading@10: yading@10: wrap = s->b8_stride; yading@10: mot_val = s->current_picture.motion_val[dir] + s->block_index[block]; yading@10: yading@10: A = mot_val[ - 1]; yading@10: /* special case for first (slice) line */ yading@10: if (s->first_slice_line && block<3) { yading@10: // we can't just change some MVs to simulate that as we need them for the B frames (and ME) yading@10: // and if we ever support non rectangular objects than we need to do a few ifs here anyway :( yading@10: if(block==0){ //most common case yading@10: if(s->mb_x == s->resync_mb_x){ //rare yading@10: *px= *py = 0; yading@10: }else if(s->mb_x + 1 == s->resync_mb_x && s->h263_pred){ //rare yading@10: C = mot_val[off[block] - wrap]; yading@10: if(s->mb_x==0){ yading@10: *px = C[0]; yading@10: *py = C[1]; yading@10: }else{ yading@10: *px = mid_pred(A[0], 0, C[0]); yading@10: *py = mid_pred(A[1], 0, C[1]); yading@10: } yading@10: }else{ yading@10: *px = A[0]; yading@10: *py = A[1]; yading@10: } yading@10: }else if(block==1){ yading@10: if(s->mb_x + 1 == s->resync_mb_x && s->h263_pred){ //rare yading@10: C = mot_val[off[block] - wrap]; yading@10: *px = mid_pred(A[0], 0, C[0]); yading@10: *py = mid_pred(A[1], 0, C[1]); yading@10: }else{ yading@10: *px = A[0]; yading@10: *py = A[1]; yading@10: } yading@10: }else{ /* block==2*/ yading@10: B = mot_val[ - wrap]; yading@10: C = mot_val[off[block] - wrap]; yading@10: if(s->mb_x == s->resync_mb_x) //rare yading@10: A[0]=A[1]=0; yading@10: yading@10: *px = mid_pred(A[0], B[0], C[0]); yading@10: *py = mid_pred(A[1], B[1], C[1]); yading@10: } yading@10: } else { yading@10: B = mot_val[ - wrap]; yading@10: C = mot_val[off[block] - wrap]; yading@10: *px = mid_pred(A[0], B[0], C[0]); yading@10: *py = mid_pred(A[1], B[1], C[1]); yading@10: } yading@10: return *mot_val; yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Get the GOB height based on picture height. yading@10: */ yading@10: int ff_h263_get_gob_height(MpegEncContext *s){ yading@10: if (s->height <= 400) yading@10: return 1; yading@10: else if (s->height <= 800) yading@10: return 2; yading@10: else yading@10: return 4; yading@10: }