Libav 0.7.1
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00001 /* 00002 * Copyright (c) 2002 The Libav Project 00003 * 00004 * This file is part of Libav. 00005 * 00006 * Libav is free software; you can redistribute it and/or 00007 * modify it under the terms of the GNU Lesser General Public 00008 * License as published by the Free Software Foundation; either 00009 * version 2.1 of the License, or (at your option) any later version. 00010 * 00011 * Libav is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00014 * Lesser General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU Lesser General Public 00017 * License along with Libav; if not, write to the Free Software 00018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00019 */ 00020 00021 #include "avcodec.h" 00022 #include "mpegvideo.h" 00023 #include "msmpeg4data.h" 00024 #include "simple_idct.h" 00025 #include "wmv2.h" 00026 00027 00028 av_cold void ff_wmv2_common_init(Wmv2Context * w){ 00029 MpegEncContext * const s= &w->s; 00030 00031 ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[0], wmv2_scantableA); 00032 ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[1], wmv2_scantableB); 00033 } 00034 00035 static void wmv2_add_block(Wmv2Context *w, DCTELEM *block1, uint8_t *dst, int stride, int n){ 00036 MpegEncContext * const s= &w->s; 00037 00038 if (s->block_last_index[n] >= 0) { 00039 switch(w->abt_type_table[n]){ 00040 case 0: 00041 s->dsp.idct_add (dst, stride, block1); 00042 break; 00043 case 1: 00044 ff_simple_idct84_add(dst , stride, block1); 00045 ff_simple_idct84_add(dst + 4*stride, stride, w->abt_block2[n]); 00046 s->dsp.clear_block(w->abt_block2[n]); 00047 break; 00048 case 2: 00049 ff_simple_idct48_add(dst , stride, block1); 00050 ff_simple_idct48_add(dst + 4 , stride, w->abt_block2[n]); 00051 s->dsp.clear_block(w->abt_block2[n]); 00052 break; 00053 default: 00054 av_log(s->avctx, AV_LOG_ERROR, "internal error in WMV2 abt\n"); 00055 } 00056 } 00057 } 00058 00059 void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block1[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr){ 00060 Wmv2Context * const w= (Wmv2Context*)s; 00061 00062 wmv2_add_block(w, block1[0], dest_y , s->linesize, 0); 00063 wmv2_add_block(w, block1[1], dest_y + 8 , s->linesize, 1); 00064 wmv2_add_block(w, block1[2], dest_y + 8*s->linesize, s->linesize, 2); 00065 wmv2_add_block(w, block1[3], dest_y + 8 + 8*s->linesize, s->linesize, 3); 00066 00067 if(s->flags&CODEC_FLAG_GRAY) return; 00068 00069 wmv2_add_block(w, block1[4], dest_cb , s->uvlinesize, 4); 00070 wmv2_add_block(w, block1[5], dest_cr , s->uvlinesize, 5); 00071 } 00072 00073 void ff_mspel_motion(MpegEncContext *s, 00074 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, 00075 uint8_t **ref_picture, op_pixels_func (*pix_op)[4], 00076 int motion_x, int motion_y, int h) 00077 { 00078 Wmv2Context * const w= (Wmv2Context*)s; 00079 uint8_t *ptr; 00080 int dxy, offset, mx, my, src_x, src_y, v_edge_pos, linesize, uvlinesize; 00081 int emu=0; 00082 00083 dxy = ((motion_y & 1) << 1) | (motion_x & 1); 00084 dxy = 2*dxy + w->hshift; 00085 src_x = s->mb_x * 16 + (motion_x >> 1); 00086 src_y = s->mb_y * 16 + (motion_y >> 1); 00087 00088 /* WARNING: do no forget half pels */ 00089 v_edge_pos = s->v_edge_pos; 00090 src_x = av_clip(src_x, -16, s->width); 00091 src_y = av_clip(src_y, -16, s->height); 00092 00093 if(src_x<=-16 || src_x >= s->width) 00094 dxy &= ~3; 00095 if(src_y<=-16 || src_y >= s->height) 00096 dxy &= ~4; 00097 00098 linesize = s->linesize; 00099 uvlinesize = s->uvlinesize; 00100 ptr = ref_picture[0] + (src_y * linesize) + src_x; 00101 00102 if(s->flags&CODEC_FLAG_EMU_EDGE){ 00103 if(src_x<1 || src_y<1 || src_x + 17 >= s->h_edge_pos 00104 || src_y + h+1 >= v_edge_pos){ 00105 s->dsp.emulated_edge_mc(s->edge_emu_buffer, ptr - 1 - s->linesize, s->linesize, 19, 19, 00106 src_x-1, src_y-1, s->h_edge_pos, s->v_edge_pos); 00107 ptr= s->edge_emu_buffer + 1 + s->linesize; 00108 emu=1; 00109 } 00110 } 00111 00112 s->dsp.put_mspel_pixels_tab[dxy](dest_y , ptr , linesize); 00113 s->dsp.put_mspel_pixels_tab[dxy](dest_y+8 , ptr+8 , linesize); 00114 s->dsp.put_mspel_pixels_tab[dxy](dest_y +8*linesize, ptr +8*linesize, linesize); 00115 s->dsp.put_mspel_pixels_tab[dxy](dest_y+8+8*linesize, ptr+8+8*linesize, linesize); 00116 00117 if(s->flags&CODEC_FLAG_GRAY) return; 00118 00119 if (s->out_format == FMT_H263) { 00120 dxy = 0; 00121 if ((motion_x & 3) != 0) 00122 dxy |= 1; 00123 if ((motion_y & 3) != 0) 00124 dxy |= 2; 00125 mx = motion_x >> 2; 00126 my = motion_y >> 2; 00127 } else { 00128 mx = motion_x / 2; 00129 my = motion_y / 2; 00130 dxy = ((my & 1) << 1) | (mx & 1); 00131 mx >>= 1; 00132 my >>= 1; 00133 } 00134 00135 src_x = s->mb_x * 8 + mx; 00136 src_y = s->mb_y * 8 + my; 00137 src_x = av_clip(src_x, -8, s->width >> 1); 00138 if (src_x == (s->width >> 1)) 00139 dxy &= ~1; 00140 src_y = av_clip(src_y, -8, s->height >> 1); 00141 if (src_y == (s->height >> 1)) 00142 dxy &= ~2; 00143 offset = (src_y * uvlinesize) + src_x; 00144 ptr = ref_picture[1] + offset; 00145 if(emu){ 00146 s->dsp.emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9, 00147 src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1); 00148 ptr= s->edge_emu_buffer; 00149 } 00150 pix_op[1][dxy](dest_cb, ptr, uvlinesize, h >> 1); 00151 00152 ptr = ref_picture[2] + offset; 00153 if(emu){ 00154 s->dsp.emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9, 00155 src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1); 00156 ptr= s->edge_emu_buffer; 00157 } 00158 pix_op[1][dxy](dest_cr, ptr, uvlinesize, h >> 1); 00159 }