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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * MPEG4 decoder / encoder common code. |
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| 3 | * Copyright (c) 2000,2001 Fabrice Bellard |
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| 4 | * Copyright (c) 2002-2010 Michael Niedermayer |
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| 5 | * |
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| 6 | * This file is part of FFmpeg. |
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| 7 | * |
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| 8 | * FFmpeg is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU Lesser General Public |
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| 10 | * License as published by the Free Software Foundation; either |
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| 11 | * version 2.1 of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * FFmpeg is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | * Lesser General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU Lesser General Public |
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| 19 | * License along with FFmpeg; if not, write to the Free Software |
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| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 21 | */ |
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| 22 | |||
| 23 | #include "mpegvideo.h" |
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| 24 | #include "mpeg4video.h" |
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| 25 | #include "mpeg4data.h" |
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| 26 | |||
| 27 | uint8_t ff_mpeg4_static_rl_table_store[3][2][2*MAX_RUN + MAX_LEVEL + 3]; |
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| 28 | |||
| 29 | int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s){ |
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| 30 | switch(s->pict_type){ |
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| 31 | case AV_PICTURE_TYPE_I: |
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| 32 | return 16; |
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| 33 | case AV_PICTURE_TYPE_P: |
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| 34 | case AV_PICTURE_TYPE_S: |
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| 35 | return s->f_code+15; |
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| 36 | case AV_PICTURE_TYPE_B: |
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| 37 | return FFMAX3(s->f_code, s->b_code, 2) + 15; |
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| 38 | default: |
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| 39 | return -1; |
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| 40 | } |
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| 41 | } |
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| 42 | |||
| 43 | void ff_mpeg4_clean_buffers(MpegEncContext *s) |
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| 44 | { |
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| 45 | int c_wrap, c_xy, l_wrap, l_xy; |
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| 46 | |||
| 47 | l_wrap= s->b8_stride; |
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| 48 | l_xy= (2*s->mb_y-1)*l_wrap + s->mb_x*2 - 1; |
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| 49 | c_wrap= s->mb_stride; |
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| 50 | c_xy= (s->mb_y-1)*c_wrap + s->mb_x - 1; |
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| 51 | |||
| 52 | #if 0 |
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| 53 | /* clean DC */ |
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| 54 | memsetw(s->dc_val[0] + l_xy, 1024, l_wrap*2+1); |
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| 55 | memsetw(s->dc_val[1] + c_xy, 1024, c_wrap+1); |
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| 56 | memsetw(s->dc_val[2] + c_xy, 1024, c_wrap+1); |
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| 57 | #endif |
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| 58 | |||
| 59 | /* clean AC */ |
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| 60 | memset(s->ac_val[0] + l_xy, 0, (l_wrap*2+1)*16*sizeof(int16_t)); |
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| 61 | memset(s->ac_val[1] + c_xy, 0, (c_wrap +1)*16*sizeof(int16_t)); |
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| 62 | memset(s->ac_val[2] + c_xy, 0, (c_wrap +1)*16*sizeof(int16_t)); |
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| 63 | |||
| 64 | /* clean MV */ |
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| 65 | // we can't clear the MVs as they might be needed by a b frame |
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| 66 | // memset(s->motion_val + l_xy, 0, (l_wrap*2+1)*2*sizeof(int16_t)); |
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| 67 | // memset(s->motion_val, 0, 2*sizeof(int16_t)*(2 + s->mb_width*2)*(2 + s->mb_height*2)); |
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| 68 | s->last_mv[0][0][0]= |
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| 69 | s->last_mv[0][0][1]= |
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| 70 | s->last_mv[1][0][0]= |
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| 71 | s->last_mv[1][0][1]= 0; |
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| 72 | } |
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| 73 | |||
| 74 | #define tab_size ((signed)FF_ARRAY_ELEMS(s->direct_scale_mv[0])) |
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| 75 | #define tab_bias (tab_size/2) |
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| 76 | |||
| 77 | //used by mpeg4 and rv10 decoder |
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| 78 | void ff_mpeg4_init_direct_mv(MpegEncContext *s){ |
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| 79 | int i; |
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| 80 | for(i=0; i |
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| 81 | s->direct_scale_mv[0][i] = (i-tab_bias)*s->pb_time/s->pp_time; |
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| 82 | s->direct_scale_mv[1][i] = (i-tab_bias)*(s->pb_time-s->pp_time)/s->pp_time; |
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| 83 | } |
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| 84 | } |
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| 85 | |||
| 86 | static inline void ff_mpeg4_set_one_direct_mv(MpegEncContext *s, int mx, int my, int i){ |
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| 87 | int xy= s->block_index[i]; |
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| 88 | uint16_t time_pp= s->pp_time; |
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| 89 | uint16_t time_pb= s->pb_time; |
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| 90 | int p_mx, p_my; |
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| 91 | |||
| 92 | p_mx = s->next_picture.motion_val[0][xy][0]; |
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| 93 | if((unsigned)(p_mx + tab_bias) < tab_size){ |
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| 94 | s->mv[0][i][0] = s->direct_scale_mv[0][p_mx + tab_bias] + mx; |
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| 95 | s->mv[1][i][0] = mx ? s->mv[0][i][0] - p_mx |
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| 96 | : s->direct_scale_mv[1][p_mx + tab_bias]; |
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| 97 | }else{ |
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| 98 | s->mv[0][i][0] = p_mx*time_pb/time_pp + mx; |
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| 99 | s->mv[1][i][0] = mx ? s->mv[0][i][0] - p_mx |
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| 100 | : p_mx*(time_pb - time_pp)/time_pp; |
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| 101 | } |
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| 102 | p_my = s->next_picture.motion_val[0][xy][1]; |
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| 103 | if((unsigned)(p_my + tab_bias) < tab_size){ |
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| 104 | s->mv[0][i][1] = s->direct_scale_mv[0][p_my + tab_bias] + my; |
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| 105 | s->mv[1][i][1] = my ? s->mv[0][i][1] - p_my |
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| 106 | : s->direct_scale_mv[1][p_my + tab_bias]; |
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| 107 | }else{ |
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| 108 | s->mv[0][i][1] = p_my*time_pb/time_pp + my; |
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| 109 | s->mv[1][i][1] = my ? s->mv[0][i][1] - p_my |
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| 110 | : p_my*(time_pb - time_pp)/time_pp; |
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| 111 | } |
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| 112 | } |
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| 113 | |||
| 114 | #undef tab_size |
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| 115 | #undef tab_bias |
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| 116 | |||
| 117 | /** |
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| 118 | * |
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| 119 | * @return the mb_type |
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| 120 | */ |
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| 121 | int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my){ |
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| 122 | const int mb_index= s->mb_x + s->mb_y*s->mb_stride; |
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| 123 | const int colocated_mb_type = s->next_picture.mb_type[mb_index]; |
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| 124 | uint16_t time_pp; |
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| 125 | uint16_t time_pb; |
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| 126 | int i; |
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| 127 | |||
| 128 | //FIXME avoid divides |
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| 129 | // try special case with shifts for 1 and 3 B-frames? |
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| 130 | |||
| 131 | if(IS_8X8(colocated_mb_type)){ |
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| 132 | s->mv_type = MV_TYPE_8X8; |
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| 133 | for(i=0; i<4; i++){ |
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| 134 | ff_mpeg4_set_one_direct_mv(s, mx, my, i); |
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| 135 | } |
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| 136 | return MB_TYPE_DIRECT2 | MB_TYPE_8x8 | MB_TYPE_L0L1; |
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| 137 | } else if(IS_INTERLACED(colocated_mb_type)){ |
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| 138 | s->mv_type = MV_TYPE_FIELD; |
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| 139 | for(i=0; i<2; i++){ |
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| 140 | int field_select = s->next_picture.ref_index[0][4 * mb_index + 2 * i]; |
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| 141 | s->field_select[0][i]= field_select; |
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| 142 | s->field_select[1][i]= i; |
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| 143 | if(s->top_field_first){ |
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| 144 | time_pp= s->pp_field_time - field_select + i; |
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| 145 | time_pb= s->pb_field_time - field_select + i; |
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| 146 | }else{ |
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| 147 | time_pp= s->pp_field_time + field_select - i; |
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| 148 | time_pb= s->pb_field_time + field_select - i; |
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| 149 | } |
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| 150 | s->mv[0][i][0] = s->p_field_mv_table[i][0][mb_index][0]*time_pb/time_pp + mx; |
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| 151 | s->mv[0][i][1] = s->p_field_mv_table[i][0][mb_index][1]*time_pb/time_pp + my; |
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| 152 | s->mv[1][i][0] = mx ? s->mv[0][i][0] - s->p_field_mv_table[i][0][mb_index][0] |
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| 153 | : s->p_field_mv_table[i][0][mb_index][0]*(time_pb - time_pp)/time_pp; |
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| 154 | s->mv[1][i][1] = my ? s->mv[0][i][1] - s->p_field_mv_table[i][0][mb_index][1] |
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| 155 | : s->p_field_mv_table[i][0][mb_index][1]*(time_pb - time_pp)/time_pp; |
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| 156 | } |
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| 157 | return MB_TYPE_DIRECT2 | MB_TYPE_16x8 | MB_TYPE_L0L1 | MB_TYPE_INTERLACED; |
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| 158 | }else{ |
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| 159 | ff_mpeg4_set_one_direct_mv(s, mx, my, 0); |
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| 160 | s->mv[0][1][0] = s->mv[0][2][0] = s->mv[0][3][0] = s->mv[0][0][0]; |
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| 161 | s->mv[0][1][1] = s->mv[0][2][1] = s->mv[0][3][1] = s->mv[0][0][1]; |
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| 162 | s->mv[1][1][0] = s->mv[1][2][0] = s->mv[1][3][0] = s->mv[1][0][0]; |
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| 163 | s->mv[1][1][1] = s->mv[1][2][1] = s->mv[1][3][1] = s->mv[1][0][1]; |
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| 164 | if((s->avctx->workaround_bugs & FF_BUG_DIRECT_BLOCKSIZE) || !s->quarter_sample) |
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| 165 | s->mv_type= MV_TYPE_16X16; |
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| 166 | else |
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| 167 | s->mv_type= MV_TYPE_8X8; |
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| 168 | return MB_TYPE_DIRECT2 | MB_TYPE_16x16 | MB_TYPE_L0L1; //Note see prev line |
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| 169 | } |
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| 170 | } |