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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6148 | serge | 1 | /* |
| 2 | * Copyright (c) 2002 The FFmpeg Project |
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| 3 | * |
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| 4 | * This file is part of FFmpeg. |
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| 5 | * |
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| 6 | * FFmpeg is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; either |
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| 9 | * version 2.1 of the License, or (at your option) any later version. |
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| 10 | * |
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| 11 | * FFmpeg is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with FFmpeg; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | */ |
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| 20 | |||
| 21 | #include "avcodec.h" |
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| 22 | #include "mpegvideo.h" |
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| 23 | #include "msmpeg4.h" |
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| 24 | #include "msmpeg4data.h" |
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| 25 | #include "h263.h" |
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| 26 | #include "wmv2.h" |
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| 27 | |||
| 28 | |||
| 29 | static int encode_ext_header(Wmv2Context *w){ |
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| 30 | MpegEncContext * const s= &w->s; |
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| 31 | PutBitContext pb; |
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| 32 | int code; |
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| 33 | |||
| 34 | init_put_bits(&pb, s->avctx->extradata, s->avctx->extradata_size); |
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| 35 | |||
| 36 | put_bits(&pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); //yes 29.97 -> 29 |
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| 37 | put_bits(&pb, 11, FFMIN(s->bit_rate/1024, 2047)); |
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| 38 | |||
| 39 | put_bits(&pb, 1, w->mspel_bit=1); |
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| 40 | put_bits(&pb, 1, s->loop_filter); |
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| 41 | put_bits(&pb, 1, w->abt_flag=1); |
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| 42 | put_bits(&pb, 1, w->j_type_bit=1); |
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| 43 | put_bits(&pb, 1, w->top_left_mv_flag=0); |
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| 44 | put_bits(&pb, 1, w->per_mb_rl_bit=1); |
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| 45 | put_bits(&pb, 3, code=1); |
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| 46 | |||
| 47 | flush_put_bits(&pb); |
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| 48 | |||
| 49 | s->slice_height = s->mb_height / code; |
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| 50 | |||
| 51 | return 0; |
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| 52 | } |
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| 53 | |||
| 54 | static av_cold int wmv2_encode_init(AVCodecContext *avctx){ |
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| 55 | Wmv2Context * const w= avctx->priv_data; |
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| 56 | |||
| 57 | if(ff_MPV_encode_init(avctx) < 0) |
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| 58 | return -1; |
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| 59 | |||
| 60 | ff_wmv2_common_init(w); |
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| 61 | |||
| 62 | avctx->extradata_size= 4; |
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| 63 | avctx->extradata= av_mallocz(avctx->extradata_size + 10); |
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| 64 | encode_ext_header(w); |
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| 65 | |||
| 66 | return 0; |
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| 67 | } |
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| 68 | |||
| 69 | int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number) |
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| 70 | { |
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| 71 | Wmv2Context * const w= (Wmv2Context*)s; |
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| 72 | |||
| 73 | put_bits(&s->pb, 1, s->pict_type - 1); |
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| 74 | if(s->pict_type == AV_PICTURE_TYPE_I){ |
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| 75 | put_bits(&s->pb, 7, 0); |
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| 76 | } |
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| 77 | put_bits(&s->pb, 5, s->qscale); |
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| 78 | |||
| 79 | s->dc_table_index = 1; |
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| 80 | s->mv_table_index = 1; /* only if P frame */ |
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| 81 | s->per_mb_rl_table = 0; |
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| 82 | s->mspel= 0; |
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| 83 | w->per_mb_abt=0; |
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| 84 | w->abt_type=0; |
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| 85 | w->j_type=0; |
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| 86 | |||
| 87 | av_assert0(s->flipflop_rounding); |
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| 88 | |||
| 89 | if (s->pict_type == AV_PICTURE_TYPE_I) { |
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| 90 | av_assert0(s->no_rounding==1); |
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| 91 | if(w->j_type_bit) put_bits(&s->pb, 1, w->j_type); |
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| 92 | |||
| 93 | if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table); |
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| 94 | |||
| 95 | if(!s->per_mb_rl_table){ |
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| 96 | ff_msmpeg4_code012(&s->pb, s->rl_chroma_table_index); |
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| 97 | ff_msmpeg4_code012(&s->pb, s->rl_table_index); |
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| 98 | } |
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| 99 | |||
| 100 | put_bits(&s->pb, 1, s->dc_table_index); |
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| 101 | |||
| 102 | s->inter_intra_pred= 0; |
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| 103 | }else{ |
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| 104 | int cbp_index; |
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| 105 | |||
| 106 | put_bits(&s->pb, 2, SKIP_TYPE_NONE); |
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| 107 | |||
| 108 | ff_msmpeg4_code012(&s->pb, cbp_index=0); |
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| 109 | if(s->qscale <= 10){ |
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| 110 | int map[3]= {0,2,1}; |
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| 111 | w->cbp_table_index= map[cbp_index]; |
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| 112 | }else if(s->qscale <= 20){ |
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| 113 | int map[3]= {1,0,2}; |
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| 114 | w->cbp_table_index= map[cbp_index]; |
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| 115 | }else{ |
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| 116 | int map[3]= {2,1,0}; |
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| 117 | w->cbp_table_index= map[cbp_index]; |
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| 118 | } |
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| 119 | |||
| 120 | if(w->mspel_bit) put_bits(&s->pb, 1, s->mspel); |
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| 121 | |||
| 122 | if(w->abt_flag){ |
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| 123 | put_bits(&s->pb, 1, w->per_mb_abt^1); |
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| 124 | if(!w->per_mb_abt){ |
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| 125 | ff_msmpeg4_code012(&s->pb, w->abt_type); |
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| 126 | } |
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| 127 | } |
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| 128 | |||
| 129 | if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table); |
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| 130 | |||
| 131 | if(!s->per_mb_rl_table){ |
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| 132 | ff_msmpeg4_code012(&s->pb, s->rl_table_index); |
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| 133 | s->rl_chroma_table_index = s->rl_table_index; |
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| 134 | } |
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| 135 | put_bits(&s->pb, 1, s->dc_table_index); |
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| 136 | put_bits(&s->pb, 1, s->mv_table_index); |
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| 137 | |||
| 138 | s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE); |
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| 139 | } |
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| 140 | s->esc3_level_length= 0; |
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| 141 | s->esc3_run_length= 0; |
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| 142 | |||
| 143 | return 0; |
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| 144 | } |
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| 145 | |||
| 146 | /* Nearly identical to wmv1 but that is just because we do not use the |
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| 147 | * useless M$ crap features. It is duplicated here in case someone wants |
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| 148 | * to add support for these crap features. */ |
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| 149 | void ff_wmv2_encode_mb(MpegEncContext * s, |
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| 150 | int16_t block[6][64], |
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| 151 | int motion_x, int motion_y) |
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| 152 | { |
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| 153 | Wmv2Context * const w= (Wmv2Context*)s; |
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| 154 | int cbp, coded_cbp, i; |
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| 155 | int pred_x, pred_y; |
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| 156 | uint8_t *coded_block; |
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| 157 | |||
| 158 | ff_msmpeg4_handle_slices(s); |
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| 159 | |||
| 160 | if (!s->mb_intra) { |
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| 161 | /* compute cbp */ |
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| 162 | cbp = 0; |
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| 163 | for (i = 0; i < 6; i++) { |
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| 164 | if (s->block_last_index[i] >= 0) |
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| 165 | cbp |= 1 << (5 - i); |
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| 166 | } |
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| 167 | |||
| 168 | put_bits(&s->pb, |
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| 169 | ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][1], |
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| 170 | ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][0]); |
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| 171 | |||
| 172 | /* motion vector */ |
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| 173 | ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); |
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| 174 | ff_msmpeg4_encode_motion(s, motion_x - pred_x, |
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| 175 | motion_y - pred_y); |
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| 176 | } else { |
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| 177 | /* compute cbp */ |
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| 178 | cbp = 0; |
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| 179 | coded_cbp = 0; |
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| 180 | for (i = 0; i < 6; i++) { |
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| 181 | int val, pred; |
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| 182 | val = (s->block_last_index[i] >= 1); |
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| 183 | cbp |= val << (5 - i); |
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| 184 | if (i < 4) { |
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| 185 | /* predict value for close blocks only for luma */ |
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| 186 | pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block); |
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| 187 | *coded_block = val; |
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| 188 | val = val ^ pred; |
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| 189 | } |
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| 190 | coded_cbp |= val << (5 - i); |
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| 191 | } |
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| 192 | |||
| 193 | if (s->pict_type == AV_PICTURE_TYPE_I) { |
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| 194 | put_bits(&s->pb, |
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| 195 | ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]); |
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| 196 | } else { |
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| 197 | put_bits(&s->pb, |
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| 198 | ff_wmv2_inter_table[w->cbp_table_index][cbp][1], |
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| 199 | ff_wmv2_inter_table[w->cbp_table_index][cbp][0]); |
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| 200 | } |
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| 201 | put_bits(&s->pb, 1, 0); /* no AC prediction yet */ |
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| 202 | if(s->inter_intra_pred){ |
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| 203 | s->h263_aic_dir=0; |
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| 204 | put_bits(&s->pb, ff_table_inter_intra[s->h263_aic_dir][1], ff_table_inter_intra[s->h263_aic_dir][0]); |
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| 205 | } |
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| 206 | } |
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| 207 | |||
| 208 | for (i = 0; i < 6; i++) { |
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| 209 | ff_msmpeg4_encode_block(s, block[i], i); |
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| 210 | } |
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| 211 | } |
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| 212 | |||
| 213 | AVCodec ff_wmv2_encoder = { |
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| 214 | .name = "wmv2", |
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| 215 | .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"), |
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| 216 | .type = AVMEDIA_TYPE_VIDEO, |
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| 217 | .id = AV_CODEC_ID_WMV2, |
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| 218 | .priv_data_size = sizeof(Wmv2Context), |
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| 219 | .init = wmv2_encode_init, |
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| 220 | .encode2 = ff_MPV_encode_picture, |
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| 221 | .close = ff_MPV_encode_end, |
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| 222 | .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, |
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| 223 | }; |