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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * ITU H263 bitstream encoder |
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| 3 | * Copyright (c) 2000,2001 Fabrice Bellard |
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| 4 | * H263+ support. |
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| 5 | * Copyright (c) 2001 Juan J. Sierralta P |
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| 6 | * Copyright (c) 2002-2004 Michael Niedermayer |
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| 7 | * |
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| 8 | * This file is part of FFmpeg. |
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| 9 | * |
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| 10 | * FFmpeg is free software; you can redistribute it and/or |
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| 11 | * modify it under the terms of the GNU Lesser General Public |
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| 12 | * License as published by the Free Software Foundation; either |
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| 13 | * version 2.1 of the License, or (at your option) any later version. |
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| 14 | * |
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| 15 | * FFmpeg is distributed in the hope that it will be useful, |
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| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 18 | * Lesser General Public License for more details. |
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| 19 | * |
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| 20 | * You should have received a copy of the GNU Lesser General Public |
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| 21 | * License along with FFmpeg; if not, write to the Free Software |
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| 22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 23 | */ |
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| 24 | |||
| 25 | /** |
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| 26 | * @file |
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| 27 | * h263 bitstream encoder. |
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| 28 | */ |
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| 29 | |||
| 30 | #include |
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| 31 | |||
| 32 | #include "libavutil/attributes.h" |
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| 33 | #include "avcodec.h" |
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| 34 | #include "mpegvideo.h" |
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| 35 | #include "h263.h" |
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| 36 | #include "mathops.h" |
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| 37 | #include "unary.h" |
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| 38 | #include "flv.h" |
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| 39 | #include "mpeg4video.h" |
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| 40 | #include "internal.h" |
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| 41 | |||
| 42 | /** |
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| 43 | * Table of number of bits a motion vector component needs. |
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| 44 | */ |
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| 45 | static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1]; |
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| 46 | |||
| 47 | /** |
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| 48 | * Minimal fcode that a motion vector component would need. |
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| 49 | */ |
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| 50 | static uint8_t fcode_tab[MAX_MV*2+1]; |
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| 51 | |||
| 52 | /** |
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| 53 | * Minimal fcode that a motion vector component would need in umv. |
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| 54 | * All entries in this table are 1. |
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| 55 | */ |
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| 56 | static uint8_t umv_fcode_tab[MAX_MV*2+1]; |
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| 57 | |||
| 58 | //unified encoding tables for run length encoding of coefficients |
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| 59 | //unified in the sense that the specification specifies the encoding in several steps. |
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| 60 | static uint8_t uni_h263_intra_aic_rl_len [64*64*2*2]; |
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| 61 | static uint8_t uni_h263_inter_rl_len [64*64*2*2]; |
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| 62 | //#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128 + (run)*256 + (level)) |
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| 63 | //#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run) + (level)*64) |
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| 64 | #define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run)*128 + (level)) |
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| 65 | |||
| 66 | static const uint8_t wrong_run[102] = { |
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| 67 | 1, 2, 3, 5, 4, 10, 9, 8, |
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| 68 | 11, 15, 17, 16, 23, 22, 21, 20, |
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| 69 | 19, 18, 25, 24, 27, 26, 11, 7, |
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| 70 | 6, 1, 2, 13, 2, 2, 2, 2, |
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| 71 | 6, 12, 3, 9, 1, 3, 4, 3, |
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| 72 | 7, 4, 1, 1, 5, 5, 14, 6, |
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| 73 | 1, 7, 1, 8, 1, 1, 1, 1, |
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| 74 | 10, 1, 1, 5, 9, 17, 25, 24, |
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| 75 | 29, 33, 32, 41, 2, 23, 28, 31, |
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| 76 | 3, 22, 30, 4, 27, 40, 8, 26, |
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| 77 | 6, 39, 7, 38, 16, 37, 15, 10, |
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| 78 | 11, 12, 13, 14, 1, 21, 20, 18, |
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| 79 | 19, 2, 1, 34, 35, 36 |
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| 80 | }; |
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| 81 | |||
| 82 | /** |
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| 83 | * Return the 4 bit value that specifies the given aspect ratio. |
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| 84 | * This may be one of the standard aspect ratios or it specifies |
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| 85 | * that the aspect will be stored explicitly later. |
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| 86 | */ |
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| 87 | av_const int ff_h263_aspect_to_info(AVRational aspect){ |
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| 88 | int i; |
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| 89 | |||
| 90 | if(aspect.num==0) aspect= (AVRational){1,1}; |
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| 91 | |||
| 92 | for(i=1; i<6; i++){ |
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| 93 | if(av_cmp_q(ff_h263_pixel_aspect[i], aspect) == 0){ |
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| 94 | return i; |
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| 95 | } |
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| 96 | } |
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| 97 | |||
| 98 | return FF_ASPECT_EXTENDED; |
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| 99 | } |
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| 100 | |||
| 101 | void ff_h263_encode_picture_header(MpegEncContext * s, int picture_number) |
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| 102 | { |
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| 103 | int format, coded_frame_rate, coded_frame_rate_base, i, temp_ref; |
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| 104 | int best_clock_code=1; |
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| 105 | int best_divisor=60; |
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| 106 | int best_error= INT_MAX; |
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| 107 | |||
| 108 | if(s->h263_plus){ |
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| 109 | for(i=0; i<2; i++){ |
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| 110 | int div, error; |
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| 111 | div= (s->avctx->time_base.num*1800000LL + 500LL*s->avctx->time_base.den) / ((1000LL+i)*s->avctx->time_base.den); |
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| 112 | div= av_clip(div, 1, 127); |
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| 113 | error= FFABS(s->avctx->time_base.num*1800000LL - (1000LL+i)*s->avctx->time_base.den*div); |
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| 114 | if(error < best_error){ |
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| 115 | best_error= error; |
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| 116 | best_divisor= div; |
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| 117 | best_clock_code= i; |
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| 118 | } |
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| 119 | } |
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| 120 | } |
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| 121 | s->custom_pcf= best_clock_code!=1 || best_divisor!=60; |
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| 122 | coded_frame_rate= 1800000; |
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| 123 | coded_frame_rate_base= (1000+best_clock_code)*best_divisor; |
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| 124 | |||
| 125 | avpriv_align_put_bits(&s->pb); |
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| 126 | |||
| 127 | /* Update the pointer to last GOB */ |
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| 128 | s->ptr_lastgob = put_bits_ptr(&s->pb); |
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| 129 | put_bits(&s->pb, 22, 0x20); /* PSC */ |
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| 130 | temp_ref= s->picture_number * (int64_t)coded_frame_rate * s->avctx->time_base.num / //FIXME use timestamp |
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| 131 | (coded_frame_rate_base * (int64_t)s->avctx->time_base.den); |
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| 132 | put_sbits(&s->pb, 8, temp_ref); /* TemporalReference */ |
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| 133 | |||
| 134 | put_bits(&s->pb, 1, 1); /* marker */ |
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| 135 | put_bits(&s->pb, 1, 0); /* h263 id */ |
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| 136 | put_bits(&s->pb, 1, 0); /* split screen off */ |
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| 137 | put_bits(&s->pb, 1, 0); /* camera off */ |
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| 138 | put_bits(&s->pb, 1, 0); /* freeze picture release off */ |
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| 139 | |||
| 140 | format = ff_match_2uint16(ff_h263_format, FF_ARRAY_ELEMS(ff_h263_format), s->width, s->height); |
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| 141 | if (!s->h263_plus) { |
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| 142 | /* H.263v1 */ |
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| 143 | put_bits(&s->pb, 3, format); |
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| 144 | put_bits(&s->pb, 1, (s->pict_type == AV_PICTURE_TYPE_P)); |
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| 145 | /* By now UMV IS DISABLED ON H.263v1, since the restrictions |
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| 146 | of H.263v1 UMV implies to check the predicted MV after |
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| 147 | calculation of the current MB to see if we're on the limits */ |
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| 148 | put_bits(&s->pb, 1, 0); /* Unrestricted Motion Vector: off */ |
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| 149 | put_bits(&s->pb, 1, 0); /* SAC: off */ |
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| 150 | put_bits(&s->pb, 1, s->obmc); /* Advanced Prediction */ |
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| 151 | put_bits(&s->pb, 1, 0); /* only I/P frames, no PB frame */ |
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| 152 | put_bits(&s->pb, 5, s->qscale); |
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| 153 | put_bits(&s->pb, 1, 0); /* Continuous Presence Multipoint mode: off */ |
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| 154 | } else { |
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| 155 | int ufep=1; |
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| 156 | /* H.263v2 */ |
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| 157 | /* H.263 Plus PTYPE */ |
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| 158 | |||
| 159 | put_bits(&s->pb, 3, 7); |
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| 160 | put_bits(&s->pb,3,ufep); /* Update Full Extended PTYPE */ |
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| 161 | if (format == 8) |
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| 162 | put_bits(&s->pb,3,6); /* Custom Source Format */ |
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| 163 | else |
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| 164 | put_bits(&s->pb, 3, format); |
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| 165 | |||
| 166 | put_bits(&s->pb,1, s->custom_pcf); |
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| 167 | put_bits(&s->pb,1, s->umvplus); /* Unrestricted Motion Vector */ |
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| 168 | put_bits(&s->pb,1,0); /* SAC: off */ |
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| 169 | put_bits(&s->pb,1,s->obmc); /* Advanced Prediction Mode */ |
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| 170 | put_bits(&s->pb,1,s->h263_aic); /* Advanced Intra Coding */ |
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| 171 | put_bits(&s->pb,1,s->loop_filter); /* Deblocking Filter */ |
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| 172 | put_bits(&s->pb,1,s->h263_slice_structured); /* Slice Structured */ |
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| 173 | put_bits(&s->pb,1,0); /* Reference Picture Selection: off */ |
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| 174 | put_bits(&s->pb,1,0); /* Independent Segment Decoding: off */ |
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| 175 | put_bits(&s->pb,1,s->alt_inter_vlc); /* Alternative Inter VLC */ |
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| 176 | put_bits(&s->pb,1,s->modified_quant); /* Modified Quantization: */ |
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| 177 | put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */ |
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| 178 | put_bits(&s->pb,3,0); /* Reserved */ |
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| 179 | |||
| 180 | put_bits(&s->pb, 3, s->pict_type == AV_PICTURE_TYPE_P); |
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| 181 | |||
| 182 | put_bits(&s->pb,1,0); /* Reference Picture Resampling: off */ |
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| 183 | put_bits(&s->pb,1,0); /* Reduced-Resolution Update: off */ |
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| 184 | put_bits(&s->pb,1,s->no_rounding); /* Rounding Type */ |
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| 185 | put_bits(&s->pb,2,0); /* Reserved */ |
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| 186 | put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */ |
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| 187 | |||
| 188 | /* This should be here if PLUSPTYPE */ |
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| 189 | put_bits(&s->pb, 1, 0); /* Continuous Presence Multipoint mode: off */ |
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| 190 | |||
| 191 | if (format == 8) { |
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| 192 | /* Custom Picture Format (CPFMT) */ |
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| 193 | s->aspect_ratio_info= ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio); |
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| 194 | |||
| 195 | put_bits(&s->pb,4,s->aspect_ratio_info); |
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| 196 | put_bits(&s->pb,9,(s->width >> 2) - 1); |
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| 197 | put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */ |
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| 198 | put_bits(&s->pb,9,(s->height >> 2)); |
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| 199 | if (s->aspect_ratio_info == FF_ASPECT_EXTENDED){ |
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| 200 | put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num); |
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| 201 | put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den); |
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| 202 | } |
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| 203 | } |
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| 204 | if(s->custom_pcf){ |
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| 205 | if(ufep){ |
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| 206 | put_bits(&s->pb, 1, best_clock_code); |
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| 207 | put_bits(&s->pb, 7, best_divisor); |
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| 208 | } |
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| 209 | put_sbits(&s->pb, 2, temp_ref>>8); |
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| 210 | } |
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| 211 | |||
| 212 | /* Unlimited Unrestricted Motion Vectors Indicator (UUI) */ |
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| 213 | if (s->umvplus) |
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| 214 | // put_bits(&s->pb,1,1); /* Limited according tables of Annex D */ |
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| 215 | //FIXME check actual requested range |
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| 216 | put_bits(&s->pb,2,1); /* unlimited */ |
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| 217 | if(s->h263_slice_structured) |
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| 218 | put_bits(&s->pb,2,0); /* no weird submodes */ |
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| 219 | |||
| 220 | put_bits(&s->pb, 5, s->qscale); |
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| 221 | } |
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| 222 | |||
| 223 | put_bits(&s->pb, 1, 0); /* no PEI */ |
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| 224 | |||
| 225 | if(s->h263_slice_structured){ |
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| 226 | put_bits(&s->pb, 1, 1); |
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| 227 | |||
| 228 | av_assert1(s->mb_x == 0 && s->mb_y == 0); |
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| 229 | ff_h263_encode_mba(s); |
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| 230 | |||
| 231 | put_bits(&s->pb, 1, 1); |
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| 232 | } |
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| 233 | |||
| 234 | if(s->h263_aic){ |
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| 235 | s->y_dc_scale_table= |
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| 236 | s->c_dc_scale_table= ff_aic_dc_scale_table; |
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| 237 | }else{ |
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| 238 | s->y_dc_scale_table= |
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| 239 | s->c_dc_scale_table= ff_mpeg1_dc_scale_table; |
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| 240 | } |
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| 241 | } |
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| 242 | |||
| 243 | /** |
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| 244 | * Encode a group of blocks header. |
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| 245 | */ |
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| 246 | void ff_h263_encode_gob_header(MpegEncContext * s, int mb_line) |
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| 247 | { |
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| 248 | put_bits(&s->pb, 17, 1); /* GBSC */ |
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| 249 | |||
| 250 | if(s->h263_slice_structured){ |
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| 251 | put_bits(&s->pb, 1, 1); |
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| 252 | |||
| 253 | ff_h263_encode_mba(s); |
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| 254 | |||
| 255 | if(s->mb_num > 1583) |
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| 256 | put_bits(&s->pb, 1, 1); |
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| 257 | put_bits(&s->pb, 5, s->qscale); /* GQUANT */ |
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| 258 | put_bits(&s->pb, 1, 1); |
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| 259 | put_bits(&s->pb, 2, s->pict_type == AV_PICTURE_TYPE_I); /* GFID */ |
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| 260 | }else{ |
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| 261 | int gob_number= mb_line / s->gob_index; |
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| 262 | |||
| 263 | put_bits(&s->pb, 5, gob_number); /* GN */ |
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| 264 | put_bits(&s->pb, 2, s->pict_type == AV_PICTURE_TYPE_I); /* GFID */ |
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| 265 | put_bits(&s->pb, 5, s->qscale); /* GQUANT */ |
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| 266 | } |
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| 267 | } |
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| 268 | |||
| 269 | /** |
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| 270 | * modify qscale so that encoding is actually possible in h263 (limit difference to -2..2) |
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| 271 | */ |
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| 272 | void ff_clean_h263_qscales(MpegEncContext *s){ |
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| 273 | int i; |
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| 274 | int8_t * const qscale_table = s->current_picture.qscale_table; |
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| 275 | |||
| 276 | ff_init_qscale_tab(s); |
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| 277 | |||
| 278 | for(i=1; i |
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| 279 | if(qscale_table[ s->mb_index2xy[i] ] - qscale_table[ s->mb_index2xy[i-1] ] >2) |
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| 280 | qscale_table[ s->mb_index2xy[i] ]= qscale_table[ s->mb_index2xy[i-1] ]+2; |
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| 281 | } |
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| 282 | for(i=s->mb_num-2; i>=0; i--){ |
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| 283 | if(qscale_table[ s->mb_index2xy[i] ] - qscale_table[ s->mb_index2xy[i+1] ] >2) |
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| 284 | qscale_table[ s->mb_index2xy[i] ]= qscale_table[ s->mb_index2xy[i+1] ]+2; |
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| 285 | } |
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| 286 | |||
| 287 | if(s->codec_id != AV_CODEC_ID_H263P){ |
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| 288 | for(i=1; i |
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| 289 | int mb_xy= s->mb_index2xy[i]; |
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| 290 | |||
| 291 | if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_INTER4V)){ |
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| 292 | s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_INTER; |
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| 293 | } |
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| 294 | } |
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| 295 | } |
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| 296 | } |
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| 297 | |||
| 298 | static const int dquant_code[5]= {1,0,9,2,3}; |
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| 299 | |||
| 300 | /** |
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| 301 | * Encode an 8x8 block. |
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| 302 | * @param block the 8x8 block |
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| 303 | * @param n block index (0-3 are luma, 4-5 are chroma) |
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| 304 | */ |
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| 305 | static void h263_encode_block(MpegEncContext * s, int16_t * block, int n) |
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| 306 | { |
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| 307 | int level, run, last, i, j, last_index, last_non_zero, sign, slevel, code; |
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| 308 | RLTable *rl; |
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| 309 | |||
| 310 | rl = &ff_h263_rl_inter; |
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| 311 | if (s->mb_intra && !s->h263_aic) { |
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| 312 | /* DC coef */ |
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| 313 | level = block[0]; |
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| 314 | /* 255 cannot be represented, so we clamp */ |
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| 315 | if (level > 254) { |
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| 316 | level = 254; |
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| 317 | block[0] = 254; |
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| 318 | } |
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| 319 | /* 0 cannot be represented also */ |
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| 320 | else if (level < 1) { |
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| 321 | level = 1; |
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| 322 | block[0] = 1; |
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| 323 | } |
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| 324 | if (level == 128) //FIXME check rv10 |
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| 325 | put_bits(&s->pb, 8, 0xff); |
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| 326 | else |
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| 327 | put_bits(&s->pb, 8, level); |
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| 328 | i = 1; |
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| 329 | } else { |
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| 330 | i = 0; |
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| 331 | if (s->h263_aic && s->mb_intra) |
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| 332 | rl = &ff_rl_intra_aic; |
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| 333 | |||
| 334 | if(s->alt_inter_vlc && !s->mb_intra){ |
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| 335 | int aic_vlc_bits=0; |
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| 336 | int inter_vlc_bits=0; |
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| 337 | int wrong_pos=-1; |
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| 338 | int aic_code; |
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| 339 | |||
| 340 | last_index = s->block_last_index[n]; |
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| 341 | last_non_zero = i - 1; |
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| 342 | for (; i <= last_index; i++) { |
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| 343 | j = s->intra_scantable.permutated[i]; |
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| 344 | level = block[j]; |
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| 345 | if (level) { |
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| 346 | run = i - last_non_zero - 1; |
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| 347 | last = (i == last_index); |
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| 348 | |||
| 349 | if(level<0) level= -level; |
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| 350 | |||
| 351 | code = get_rl_index(rl, last, run, level); |
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| 352 | aic_code = get_rl_index(&ff_rl_intra_aic, last, run, level); |
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| 353 | inter_vlc_bits += rl->table_vlc[code][1]+1; |
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| 354 | aic_vlc_bits += ff_rl_intra_aic.table_vlc[aic_code][1]+1; |
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| 355 | |||
| 356 | if (code == rl->n) { |
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| 357 | inter_vlc_bits += 1+6+8-1; |
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| 358 | } |
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| 359 | if (aic_code == ff_rl_intra_aic.n) { |
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| 360 | aic_vlc_bits += 1+6+8-1; |
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| 361 | wrong_pos += run + 1; |
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| 362 | }else |
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| 363 | wrong_pos += wrong_run[aic_code]; |
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| 364 | last_non_zero = i; |
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| 365 | } |
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| 366 | } |
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| 367 | i = 0; |
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| 368 | if(aic_vlc_bits < inter_vlc_bits && wrong_pos > 63) |
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| 369 | rl = &ff_rl_intra_aic; |
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| 370 | } |
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| 371 | } |
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| 372 | |||
| 373 | /* AC coefs */ |
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| 374 | last_index = s->block_last_index[n]; |
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| 375 | last_non_zero = i - 1; |
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| 376 | for (; i <= last_index; i++) { |
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| 377 | j = s->intra_scantable.permutated[i]; |
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| 378 | level = block[j]; |
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| 379 | if (level) { |
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| 380 | run = i - last_non_zero - 1; |
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| 381 | last = (i == last_index); |
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| 382 | sign = 0; |
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| 383 | slevel = level; |
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| 384 | if (level < 0) { |
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| 385 | sign = 1; |
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| 386 | level = -level; |
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| 387 | } |
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| 388 | code = get_rl_index(rl, last, run, level); |
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| 389 | put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); |
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| 390 | if (code == rl->n) { |
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| 391 | if(!CONFIG_FLV_ENCODER || s->h263_flv <= 1){ |
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| 392 | put_bits(&s->pb, 1, last); |
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| 393 | put_bits(&s->pb, 6, run); |
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| 394 | |||
| 395 | av_assert2(slevel != 0); |
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| 396 | |||
| 397 | if(level < 128) |
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| 398 | put_sbits(&s->pb, 8, slevel); |
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| 399 | else{ |
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| 400 | put_bits(&s->pb, 8, 128); |
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| 401 | put_sbits(&s->pb, 5, slevel); |
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| 402 | put_sbits(&s->pb, 6, slevel>>5); |
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| 403 | } |
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| 404 | }else{ |
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| 405 | ff_flv2_encode_ac_esc(&s->pb, slevel, level, run, last); |
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| 406 | } |
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| 407 | } else { |
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| 408 | put_bits(&s->pb, 1, sign); |
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| 409 | } |
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| 410 | last_non_zero = i; |
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| 411 | } |
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| 412 | } |
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| 413 | } |
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| 414 | |||
| 415 | /* Encode MV differences on H.263+ with Unrestricted MV mode */ |
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| 416 | static void h263p_encode_umotion(MpegEncContext * s, int val) |
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| 417 | { |
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| 418 | short sval = 0; |
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| 419 | short i = 0; |
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| 420 | short n_bits = 0; |
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| 421 | short temp_val; |
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| 422 | int code = 0; |
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| 423 | int tcode; |
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| 424 | |||
| 425 | if ( val == 0) |
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| 426 | put_bits(&s->pb, 1, 1); |
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| 427 | else if (val == 1) |
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| 428 | put_bits(&s->pb, 3, 0); |
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| 429 | else if (val == -1) |
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| 430 | put_bits(&s->pb, 3, 2); |
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| 431 | else { |
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| 432 | |||
| 433 | sval = ((val < 0) ? (short)(-val):(short)val); |
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| 434 | temp_val = sval; |
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| 435 | |||
| 436 | while (temp_val != 0) { |
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| 437 | temp_val = temp_val >> 1; |
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| 438 | n_bits++; |
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| 439 | } |
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| 440 | |||
| 441 | i = n_bits - 1; |
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| 442 | while (i > 0) { |
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| 443 | tcode = (sval & (1 << (i-1))) >> (i-1); |
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| 444 | tcode = (tcode << 1) | 1; |
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| 445 | code = (code << 2) | tcode; |
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| 446 | i--; |
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| 447 | } |
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| 448 | code = ((code << 1) | (val < 0)) << 1; |
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| 449 | put_bits(&s->pb, (2*n_bits)+1, code); |
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| 450 | } |
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| 451 | } |
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| 452 | |||
| 453 | void ff_h263_encode_mb(MpegEncContext * s, |
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| 454 | int16_t block[6][64], |
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| 455 | int motion_x, int motion_y) |
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| 456 | { |
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| 457 | int cbpc, cbpy, i, cbp, pred_x, pred_y; |
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| 458 | int16_t pred_dc; |
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| 459 | int16_t rec_intradc[6]; |
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| 460 | int16_t *dc_ptr[6]; |
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| 461 | const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1); |
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| 462 | |||
| 463 | if (!s->mb_intra) { |
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| 464 | /* compute cbp */ |
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| 465 | cbp= get_p_cbp(s, block, motion_x, motion_y); |
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| 466 | |||
| 467 | if ((cbp | motion_x | motion_y | s->dquant | (s->mv_type - MV_TYPE_16X16)) == 0) { |
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| 468 | /* skip macroblock */ |
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| 469 | put_bits(&s->pb, 1, 1); |
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| 470 | if(interleaved_stats){ |
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| 471 | s->misc_bits++; |
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| 472 | s->last_bits++; |
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| 473 | } |
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| 474 | s->skip_count++; |
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| 475 | |||
| 476 | return; |
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| 477 | } |
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| 478 | put_bits(&s->pb, 1, 0); /* mb coded */ |
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| 479 | |||
| 480 | cbpc = cbp & 3; |
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| 481 | cbpy = cbp >> 2; |
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| 482 | if(s->alt_inter_vlc==0 || cbpc!=3) |
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| 483 | cbpy ^= 0xF; |
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| 484 | if(s->dquant) cbpc+= 8; |
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| 485 | if(s->mv_type==MV_TYPE_16X16){ |
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| 486 | put_bits(&s->pb, |
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| 487 | ff_h263_inter_MCBPC_bits[cbpc], |
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| 488 | ff_h263_inter_MCBPC_code[cbpc]); |
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| 489 | |||
| 490 | put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); |
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| 491 | if(s->dquant) |
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| 492 | put_bits(&s->pb, 2, dquant_code[s->dquant+2]); |
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| 493 | |||
| 494 | if(interleaved_stats){ |
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| 495 | s->misc_bits+= get_bits_diff(s); |
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| 496 | } |
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| 497 | |||
| 498 | /* motion vectors: 16x16 mode */ |
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| 499 | ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); |
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| 500 | |||
| 501 | if (!s->umvplus) { |
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| 502 | ff_h263_encode_motion_vector(s, motion_x - pred_x, |
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| 503 | motion_y - pred_y, 1); |
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| 504 | } |
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| 505 | else { |
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| 506 | h263p_encode_umotion(s, motion_x - pred_x); |
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| 507 | h263p_encode_umotion(s, motion_y - pred_y); |
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| 508 | if (((motion_x - pred_x) == 1) && ((motion_y - pred_y) == 1)) |
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| 509 | /* To prevent Start Code emulation */ |
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| 510 | put_bits(&s->pb,1,1); |
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| 511 | } |
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| 512 | }else{ |
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| 513 | put_bits(&s->pb, |
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| 514 | ff_h263_inter_MCBPC_bits[cbpc+16], |
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| 515 | ff_h263_inter_MCBPC_code[cbpc+16]); |
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| 516 | put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); |
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| 517 | if(s->dquant) |
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| 518 | put_bits(&s->pb, 2, dquant_code[s->dquant+2]); |
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| 519 | |||
| 520 | if(interleaved_stats){ |
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| 521 | s->misc_bits+= get_bits_diff(s); |
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| 522 | } |
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| 523 | |||
| 524 | for(i=0; i<4; i++){ |
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| 525 | /* motion vectors: 8x8 mode*/ |
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| 526 | ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y); |
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| 527 | |||
| 528 | motion_x = s->current_picture.motion_val[0][s->block_index[i]][0]; |
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| 529 | motion_y = s->current_picture.motion_val[0][s->block_index[i]][1]; |
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| 530 | if (!s->umvplus) { |
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| 531 | ff_h263_encode_motion_vector(s, motion_x - pred_x, |
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| 532 | motion_y - pred_y, 1); |
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| 533 | } |
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| 534 | else { |
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| 535 | h263p_encode_umotion(s, motion_x - pred_x); |
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| 536 | h263p_encode_umotion(s, motion_y - pred_y); |
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| 537 | if (((motion_x - pred_x) == 1) && ((motion_y - pred_y) == 1)) |
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| 538 | /* To prevent Start Code emulation */ |
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| 539 | put_bits(&s->pb,1,1); |
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| 540 | } |
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| 541 | } |
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| 542 | } |
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| 543 | |||
| 544 | if(interleaved_stats){ |
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| 545 | s->mv_bits+= get_bits_diff(s); |
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| 546 | } |
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| 547 | } else { |
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| 548 | av_assert2(s->mb_intra); |
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| 549 | |||
| 550 | cbp = 0; |
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| 551 | if (s->h263_aic) { |
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| 552 | /* Predict DC */ |
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| 553 | for(i=0; i<6; i++) { |
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| 554 | int16_t level = block[i][0]; |
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| 555 | int scale; |
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| 556 | |||
| 557 | if(i<4) scale= s->y_dc_scale; |
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| 558 | else scale= s->c_dc_scale; |
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| 559 | |||
| 560 | pred_dc = ff_h263_pred_dc(s, i, &dc_ptr[i]); |
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| 561 | level -= pred_dc; |
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| 562 | /* Quant */ |
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| 563 | if (level >= 0) |
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| 564 | level = (level + (scale>>1))/scale; |
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| 565 | else |
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| 566 | level = (level - (scale>>1))/scale; |
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| 567 | |||
| 568 | /* AIC can change CBP */ |
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| 569 | if (level == 0 && s->block_last_index[i] == 0) |
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| 570 | s->block_last_index[i] = -1; |
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| 571 | |||
| 572 | if(!s->modified_quant){ |
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| 573 | if (level < -127) |
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| 574 | level = -127; |
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| 575 | else if (level > 127) |
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| 576 | level = 127; |
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| 577 | } |
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| 578 | |||
| 579 | block[i][0] = level; |
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| 580 | /* Reconstruction */ |
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| 581 | rec_intradc[i] = scale*level + pred_dc; |
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| 582 | /* Oddify */ |
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| 583 | rec_intradc[i] |= 1; |
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| 584 | //if ((rec_intradc[i] % 2) == 0) |
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| 585 | // rec_intradc[i]++; |
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| 586 | /* Clipping */ |
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| 587 | if (rec_intradc[i] < 0) |
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| 588 | rec_intradc[i] = 0; |
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| 589 | else if (rec_intradc[i] > 2047) |
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| 590 | rec_intradc[i] = 2047; |
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| 591 | |||
| 592 | /* Update AC/DC tables */ |
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| 593 | *dc_ptr[i] = rec_intradc[i]; |
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| 594 | if (s->block_last_index[i] >= 0) |
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| 595 | cbp |= 1 << (5 - i); |
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| 596 | } |
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| 597 | }else{ |
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| 598 | for(i=0; i<6; i++) { |
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| 599 | /* compute cbp */ |
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| 600 | if (s->block_last_index[i] >= 1) |
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| 601 | cbp |= 1 << (5 - i); |
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| 602 | } |
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| 603 | } |
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| 604 | |||
| 605 | cbpc = cbp & 3; |
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| 606 | if (s->pict_type == AV_PICTURE_TYPE_I) { |
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| 607 | if(s->dquant) cbpc+=4; |
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| 608 | put_bits(&s->pb, |
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| 609 | ff_h263_intra_MCBPC_bits[cbpc], |
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| 610 | ff_h263_intra_MCBPC_code[cbpc]); |
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| 611 | } else { |
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| 612 | if(s->dquant) cbpc+=8; |
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| 613 | put_bits(&s->pb, 1, 0); /* mb coded */ |
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| 614 | put_bits(&s->pb, |
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| 615 | ff_h263_inter_MCBPC_bits[cbpc + 4], |
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| 616 | ff_h263_inter_MCBPC_code[cbpc + 4]); |
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| 617 | } |
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| 618 | if (s->h263_aic) { |
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| 619 | /* XXX: currently, we do not try to use ac prediction */ |
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| 620 | put_bits(&s->pb, 1, 0); /* no AC prediction */ |
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| 621 | } |
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| 622 | cbpy = cbp >> 2; |
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| 623 | put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); |
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| 624 | if(s->dquant) |
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| 625 | put_bits(&s->pb, 2, dquant_code[s->dquant+2]); |
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| 626 | |||
| 627 | if(interleaved_stats){ |
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| 628 | s->misc_bits+= get_bits_diff(s); |
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| 629 | } |
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| 630 | } |
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| 631 | |||
| 632 | for(i=0; i<6; i++) { |
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| 633 | /* encode each block */ |
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| 634 | h263_encode_block(s, block[i], i); |
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| 635 | |||
| 636 | /* Update INTRADC for decoding */ |
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| 637 | if (s->h263_aic && s->mb_intra) { |
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| 638 | block[i][0] = rec_intradc[i]; |
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| 639 | |||
| 640 | } |
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| 641 | } |
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| 642 | |||
| 643 | if(interleaved_stats){ |
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| 644 | if (!s->mb_intra) { |
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| 645 | s->p_tex_bits+= get_bits_diff(s); |
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| 646 | s->f_count++; |
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| 647 | }else{ |
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| 648 | s->i_tex_bits+= get_bits_diff(s); |
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| 649 | s->i_count++; |
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| 650 | } |
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| 651 | } |
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| 652 | } |
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| 653 | |||
| 654 | void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code) |
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| 655 | { |
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| 656 | int range, bit_size, sign, code, bits; |
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| 657 | |||
| 658 | if (val == 0) { |
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| 659 | /* zero vector */ |
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| 660 | code = 0; |
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| 661 | put_bits(&s->pb, ff_mvtab[code][1], ff_mvtab[code][0]); |
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| 662 | } else { |
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| 663 | bit_size = f_code - 1; |
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| 664 | range = 1 << bit_size; |
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| 665 | /* modulo encoding */ |
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| 666 | val = sign_extend(val, 6 + bit_size); |
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| 667 | sign = val>>31; |
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| 668 | val= (val^sign)-sign; |
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| 669 | sign&=1; |
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| 670 | |||
| 671 | val--; |
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| 672 | code = (val >> bit_size) + 1; |
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| 673 | bits = val & (range - 1); |
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| 674 | |||
| 675 | put_bits(&s->pb, ff_mvtab[code][1] + 1, (ff_mvtab[code][0] << 1) | sign); |
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| 676 | if (bit_size > 0) { |
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| 677 | put_bits(&s->pb, bit_size, bits); |
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| 678 | } |
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| 679 | } |
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| 680 | } |
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| 681 | |||
| 682 | static av_cold void init_mv_penalty_and_fcode(MpegEncContext *s) |
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| 683 | { |
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| 684 | int f_code; |
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| 685 | int mv; |
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| 686 | |||
| 687 | for(f_code=1; f_code<=MAX_FCODE; f_code++){ |
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| 688 | for(mv=-MAX_MV; mv<=MAX_MV; mv++){ |
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| 689 | int len; |
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| 690 | |||
| 691 | if(mv==0) len= ff_mvtab[0][1]; |
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| 692 | else{ |
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| 693 | int val, bit_size, code; |
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| 694 | |||
| 695 | bit_size = f_code - 1; |
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| 696 | |||
| 697 | val=mv; |
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| 698 | if (val < 0) |
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| 699 | val = -val; |
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| 700 | val--; |
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| 701 | code = (val >> bit_size) + 1; |
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| 702 | if(code<33){ |
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| 703 | len= ff_mvtab[code][1] + 1 + bit_size; |
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| 704 | }else{ |
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| 705 | len= ff_mvtab[32][1] + av_log2(code>>5) + 2 + bit_size; |
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| 706 | } |
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| 707 | } |
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| 708 | |||
| 709 | mv_penalty[f_code][mv+MAX_MV]= len; |
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| 710 | } |
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| 711 | } |
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| 712 | |||
| 713 | for(f_code=MAX_FCODE; f_code>0; f_code--){ |
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| 714 | for(mv=-(16< |
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| 715 | fcode_tab[mv+MAX_MV]= f_code; |
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| 716 | } |
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| 717 | } |
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| 718 | |||
| 719 | for(mv=0; mv |
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| 720 | umv_fcode_tab[mv]= 1; |
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| 721 | } |
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| 722 | } |
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| 723 | |||
| 724 | static av_cold void init_uni_h263_rl_tab(RLTable *rl, uint32_t *bits_tab, |
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| 725 | uint8_t *len_tab) |
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| 726 | { |
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| 727 | int slevel, run, last; |
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| 728 | |||
| 729 | av_assert0(MAX_LEVEL >= 64); |
||
| 730 | av_assert0(MAX_RUN >= 63); |
||
| 731 | |||
| 732 | for(slevel=-64; slevel<64; slevel++){ |
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| 733 | if(slevel==0) continue; |
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| 734 | for(run=0; run<64; run++){ |
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| 735 | for(last=0; last<=1; last++){ |
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| 736 | const int index= UNI_MPEG4_ENC_INDEX(last, run, slevel+64); |
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| 737 | int level= slevel < 0 ? -slevel : slevel; |
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| 738 | int sign= slevel < 0 ? 1 : 0; |
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| 739 | int bits, len, code; |
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| 740 | |||
| 741 | len_tab[index]= 100; |
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| 742 | |||
| 743 | /* ESC0 */ |
||
| 744 | code= get_rl_index(rl, last, run, level); |
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| 745 | bits= rl->table_vlc[code][0]; |
||
| 746 | len= rl->table_vlc[code][1]; |
||
| 747 | bits=bits*2+sign; len++; |
||
| 748 | |||
| 749 | if(code!=rl->n && len < len_tab[index]){ |
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| 750 | if(bits_tab) bits_tab[index]= bits; |
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| 751 | len_tab [index]= len; |
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| 752 | } |
||
| 753 | /* ESC */ |
||
| 754 | bits= rl->table_vlc[rl->n][0]; |
||
| 755 | len = rl->table_vlc[rl->n][1]; |
||
| 756 | bits=bits*2+last; len++; |
||
| 757 | bits=bits*64+run; len+=6; |
||
| 758 | bits=bits*256+(level&0xff); len+=8; |
||
| 759 | |||
| 760 | if(len < len_tab[index]){ |
||
| 761 | if(bits_tab) bits_tab[index]= bits; |
||
| 762 | len_tab [index]= len; |
||
| 763 | } |
||
| 764 | } |
||
| 765 | } |
||
| 766 | } |
||
| 767 | } |
||
| 768 | |||
| 769 | av_cold void ff_h263_encode_init(MpegEncContext *s) |
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| 770 | { |
||
| 771 | static int done = 0; |
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| 772 | |||
| 773 | if (!done) { |
||
| 774 | done = 1; |
||
| 775 | |||
| 776 | ff_init_rl(&ff_h263_rl_inter, ff_h263_static_rl_table_store[0]); |
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| 777 | ff_init_rl(&ff_rl_intra_aic, ff_h263_static_rl_table_store[1]); |
||
| 778 | |||
| 779 | init_uni_h263_rl_tab(&ff_rl_intra_aic, NULL, uni_h263_intra_aic_rl_len); |
||
| 780 | init_uni_h263_rl_tab(&ff_h263_rl_inter , NULL, uni_h263_inter_rl_len); |
||
| 781 | |||
| 782 | init_mv_penalty_and_fcode(s); |
||
| 783 | } |
||
| 784 | s->me.mv_penalty= mv_penalty; //FIXME exact table for msmpeg4 & h263p |
||
| 785 | |||
| 786 | s->intra_ac_vlc_length =s->inter_ac_vlc_length = uni_h263_inter_rl_len; |
||
| 787 | s->intra_ac_vlc_last_length=s->inter_ac_vlc_last_length= uni_h263_inter_rl_len + 128*64; |
||
| 788 | if(s->h263_aic){ |
||
| 789 | s->intra_ac_vlc_length = uni_h263_intra_aic_rl_len; |
||
| 790 | s->intra_ac_vlc_last_length= uni_h263_intra_aic_rl_len + 128*64; |
||
| 791 | } |
||
| 792 | s->ac_esc_length= 7+1+6+8; |
||
| 793 | |||
| 794 | // use fcodes >1 only for mpeg4 & h263 & h263p FIXME |
||
| 795 | switch(s->codec_id){ |
||
| 796 | case AV_CODEC_ID_MPEG4: |
||
| 797 | s->fcode_tab= fcode_tab; |
||
| 798 | break; |
||
| 799 | case AV_CODEC_ID_H263P: |
||
| 800 | if(s->umvplus) |
||
| 801 | s->fcode_tab= umv_fcode_tab; |
||
| 802 | if(s->modified_quant){ |
||
| 803 | s->min_qcoeff= -2047; |
||
| 804 | s->max_qcoeff= 2047; |
||
| 805 | }else{ |
||
| 806 | s->min_qcoeff= -127; |
||
| 807 | s->max_qcoeff= 127; |
||
| 808 | } |
||
| 809 | break; |
||
| 810 | //Note for mpeg4 & h263 the dc-scale table will be set per frame as needed later |
||
| 811 | case AV_CODEC_ID_FLV1: |
||
| 812 | if (s->h263_flv > 1) { |
||
| 813 | s->min_qcoeff= -1023; |
||
| 814 | s->max_qcoeff= 1023; |
||
| 815 | } else { |
||
| 816 | s->min_qcoeff= -127; |
||
| 817 | s->max_qcoeff= 127; |
||
| 818 | } |
||
| 819 | s->y_dc_scale_table= |
||
| 820 | s->c_dc_scale_table= ff_mpeg1_dc_scale_table; |
||
| 821 | break; |
||
| 822 | default: //nothing needed - default table already set in mpegvideo.c |
||
| 823 | s->min_qcoeff= -127; |
||
| 824 | s->max_qcoeff= 127; |
||
| 825 | s->y_dc_scale_table= |
||
| 826 | s->c_dc_scale_table= ff_mpeg1_dc_scale_table; |
||
| 827 | } |
||
| 828 | } |
||
| 829 | |||
| 830 | void ff_h263_encode_mba(MpegEncContext *s) |
||
| 831 | { |
||
| 832 | int i, mb_pos; |
||
| 833 | |||
| 834 | for(i=0; i<6; i++){ |
||
| 835 | if(s->mb_num-1 <= ff_mba_max[i]) break; |
||
| 836 | } |
||
| 837 | mb_pos= s->mb_x + s->mb_width*s->mb_y; |
||
| 838 | put_bits(&s->pb, ff_mba_length[i], mb_pos); |
||
| 839 | } |