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1 | /* | ||
2 | * H.263 encoder header | ||
3 | * | ||
4 | * This file is part of FFmpeg. | ||
5 | * | ||
6 | * FFmpeg is free software; you can redistribute it and/or | ||
7 | * modify it under the terms of the GNU Lesser General Public | ||
8 | * License as published by the Free Software Foundation; either | ||
9 | * version 2.1 of the License, or (at your option) any later version. | ||
10 | * | ||
11 | * FFmpeg is distributed in the hope that it will be useful, | ||
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
14 | * Lesser General Public License for more details. | ||
15 | * | ||
16 | * You should have received a copy of the GNU Lesser General Public | ||
17 | * License along with FFmpeg; if not, write to the Free Software | ||
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
19 | */ | ||
20 | #ifndef AVCODEC_H263ENC_H | ||
21 | #define AVCODEC_H263ENC_H | ||
22 | |||
23 | #include <stdint.h> | ||
24 | #include "h263data.h" | ||
25 | #include "mpegvideoenc.h" | ||
26 | |||
27 | void ff_h263_encode_init(MpegEncContext *s); | ||
28 | void ff_h263_encode_picture_header(MpegEncContext *s); | ||
29 | void ff_h263_encode_gob_header(MpegEncContext * s, int mb_line); | ||
30 | void ff_h263_encode_mb(MpegEncContext *s, | ||
31 | int16_t block[6][64], | ||
32 | int motion_x, int motion_y); | ||
33 | void ff_h263_encode_mba(MpegEncContext *s); | ||
34 | |||
35 | void ff_init_qscale_tab(MpegEncContext *s); | ||
36 | void ff_clean_h263_qscales(MpegEncContext *s); | ||
37 | |||
38 | void ff_h263_encode_motion(PutBitContext *pb, int val, int f_code); | ||
39 | |||
40 | |||
41 | ✗ | static inline int h263_get_motion_length(int val, int f_code) | |
42 | { | ||
43 | int bit_size, code, sign; | ||
44 | |||
45 | ✗ | if (val == 0) { | |
46 | ✗ | return 1; /* ff_mvtab[0][1] */ | |
47 | } else { | ||
48 | ✗ | bit_size = f_code - 1; | |
49 | /* modulo encoding */ | ||
50 | ✗ | val = sign_extend(val, 6 + bit_size); | |
51 | ✗ | sign = val >> 31; | |
52 | ✗ | val = (val ^ sign) - sign; /* val = FFABS(val) */ | |
53 | ✗ | val--; | |
54 | ✗ | code = (val >> bit_size) + 1; | |
55 | |||
56 | ✗ | return ff_mvtab[code][1] + 1 + bit_size; | |
57 | } | ||
58 | } | ||
59 | |||
60 | 2632578 | static inline void ff_h263_encode_motion_vector(MpegEncContext * s, | |
61 | int x, int y, int f_code) | ||
62 | { | ||
63 |
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2632578 | if (s->avctx->flags2 & AV_CODEC_FLAG2_NO_OUTPUT) { |
64 | ✗ | skip_put_bits(&s->pb, | |
65 | ✗ | h263_get_motion_length(x, f_code) + | |
66 | ✗ | h263_get_motion_length(y, f_code)); | |
67 | } else { | ||
68 | 2632578 | ff_h263_encode_motion(&s->pb, x, f_code); | |
69 | 2632578 | ff_h263_encode_motion(&s->pb, y, f_code); | |
70 | } | ||
71 | 2632578 | } | |
72 | |||
73 | 1189745 | static inline int get_p_cbp(MpegEncContext * s, | |
74 | int16_t block[6][64], | ||
75 | int motion_x, int motion_y){ | ||
76 | int cbp; | ||
77 | |||
78 |
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1189745 | if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) { |
79 | ✗ | int best_cbpy_score = INT_MAX; | |
80 | ✗ | int best_cbpc_score = INT_MAX; | |
81 | ✗ | int cbpc = (-1), cbpy = (-1); | |
82 | ✗ | const int offset = (s->mv_type == MV_TYPE_16X16 ? 0 : 16) + (s->dquant ? 8 : 0); | |
83 | ✗ | const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6); | |
84 | |||
85 | ✗ | for (int i = 0; i < 4; i++) { | |
86 | ✗ | int score = ff_h263_inter_MCBPC_bits[i + offset] * lambda; | |
87 | ✗ | if (i & 1) score += s->coded_score[5]; | |
88 | ✗ | if (i & 2) score += s->coded_score[4]; | |
89 | |||
90 | ✗ | if (score < best_cbpc_score) { | |
91 | ✗ | best_cbpc_score = score; | |
92 | ✗ | cbpc = i; | |
93 | } | ||
94 | } | ||
95 | |||
96 | ✗ | for (int i = 0; i < 16; i++) { | |
97 | ✗ | int score= ff_h263_cbpy_tab[i ^ 0xF][1] * lambda; | |
98 | ✗ | if (i & 1) score += s->coded_score[3]; | |
99 | ✗ | if (i & 2) score += s->coded_score[2]; | |
100 | ✗ | if (i & 4) score += s->coded_score[1]; | |
101 | ✗ | if (i & 8) score += s->coded_score[0]; | |
102 | |||
103 | ✗ | if (score < best_cbpy_score) { | |
104 | ✗ | best_cbpy_score = score; | |
105 | ✗ | cbpy = i; | |
106 | } | ||
107 | } | ||
108 | ✗ | cbp = cbpc + 4 * cbpy; | |
109 | ✗ | if (!(motion_x | motion_y | s->dquant) && s->mv_type == MV_TYPE_16X16) { | |
110 | ✗ | if (best_cbpy_score + best_cbpc_score + 2 * lambda >= 0) | |
111 | ✗ | cbp= 0; | |
112 | } | ||
113 | |||
114 | ✗ | for (int i = 0; i < 6; i++) { | |
115 | ✗ | if (s->block_last_index[i] >= 0 && !((cbp >> (5 - i)) & 1)) { | |
116 | ✗ | s->block_last_index[i] = -1; | |
117 | ✗ | s->bdsp.clear_block(s->block[i]); | |
118 | } | ||
119 | } | ||
120 | } else { | ||
121 | 1189745 | cbp = 0; | |
122 |
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8328215 | for (int i = 0; i < 6; i++) { |
123 |
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7138470 | if (s->block_last_index[i] >= 0) |
124 | 3138965 | cbp |= 1 << (5 - i); | |
125 | } | ||
126 | } | ||
127 | 1189745 | return cbp; | |
128 | } | ||
129 | |||
130 | #endif | ||
131 |