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1 | /* |
2 | * H263 internal 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_H263_H | |
21 | #define AVCODEC_H263_H | |
22 | ||
23 | #include <stdint.h> | |
24 | #include "libavutil/rational.h" | |
25 | #include "get_bits.h" | |
26 | #include "mpegvideo.h" | |
27 | #include "rl.h" | |
28 | ||
29 | #if !FF_API_ASPECT_EXTENDED | |
30 | #define FF_ASPECT_EXTENDED 15 | |
31 | #endif | |
f6fa7814 | 32 | #define INT_BIT (CHAR_BIT * sizeof(int)) |
2ba45a60 DM |
33 | |
34 | // The defines below define the number of bits that are read at once for | |
35 | // reading vlc values. Changing these may improve speed and data cache needs | |
36 | // be aware though that decreasing them may need the number of stages that is | |
37 | // passed to get_vlc* to be increased. | |
38 | #define INTRA_MCBPC_VLC_BITS 6 | |
39 | #define INTER_MCBPC_VLC_BITS 7 | |
40 | #define CBPY_VLC_BITS 6 | |
41 | #define TEX_VLC_BITS 9 | |
42 | ||
43 | extern const AVRational ff_h263_pixel_aspect[16]; | |
44 | extern const uint8_t ff_h263_cbpy_tab[16][2]; | |
45 | ||
46 | extern const uint8_t ff_cbpc_b_tab[4][2]; | |
47 | ||
48 | extern const uint8_t ff_mvtab[33][2]; | |
49 | ||
50 | extern const uint8_t ff_h263_intra_MCBPC_code[9]; | |
51 | extern const uint8_t ff_h263_intra_MCBPC_bits[9]; | |
52 | ||
53 | extern const uint8_t ff_h263_inter_MCBPC_code[28]; | |
54 | extern const uint8_t ff_h263_inter_MCBPC_bits[28]; | |
55 | extern const uint8_t ff_h263_mbtype_b_tab[15][2]; | |
56 | ||
57 | extern VLC ff_h263_intra_MCBPC_vlc; | |
58 | extern VLC ff_h263_inter_MCBPC_vlc; | |
59 | extern VLC ff_h263_cbpy_vlc; | |
60 | ||
61 | extern const uint16_t ff_inter_vlc[103][2]; | |
62 | extern const int8_t ff_inter_level[102]; | |
63 | extern const int8_t ff_inter_run[102]; | |
64 | ||
65 | extern RLTable ff_h263_rl_inter; | |
66 | ||
67 | extern RLTable ff_rl_intra_aic; | |
68 | ||
69 | extern const uint16_t ff_h263_format[8][2]; | |
70 | extern const uint8_t ff_modified_quant_tab[2][32]; | |
71 | extern const uint16_t ff_mba_max[6]; | |
72 | extern const uint8_t ff_mba_length[7]; | |
73 | ||
74 | extern uint8_t ff_h263_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3]; | |
75 | ||
76 | extern const enum AVPixelFormat ff_h263_hwaccel_pixfmt_list_420[]; | |
77 | ||
78 | ||
79 | int ff_h263_decode_motion(MpegEncContext * s, int pred, int f_code); | |
80 | av_const int ff_h263_aspect_to_info(AVRational aspect); | |
81 | int ff_h263_decode_init(AVCodecContext *avctx); | |
82 | int ff_h263_decode_frame(AVCodecContext *avctx, | |
83 | void *data, int *got_frame, | |
84 | AVPacket *avpkt); | |
85 | int ff_h263_decode_end(AVCodecContext *avctx); | |
86 | void ff_h263_encode_mb(MpegEncContext *s, | |
87 | int16_t block[6][64], | |
88 | int motion_x, int motion_y); | |
89 | void ff_h263_encode_picture_header(MpegEncContext *s, int picture_number); | |
90 | void ff_h263_encode_gob_header(MpegEncContext * s, int mb_line); | |
91 | int16_t *ff_h263_pred_motion(MpegEncContext * s, int block, int dir, | |
92 | int *px, int *py); | |
93 | void ff_h263_encode_init(MpegEncContext *s); | |
94 | void ff_h263_decode_init_vlc(void); | |
95 | int ff_h263_decode_picture_header(MpegEncContext *s); | |
96 | int ff_h263_decode_gob_header(MpegEncContext *s); | |
97 | void ff_h263_update_motion_val(MpegEncContext * s); | |
98 | void ff_h263_loop_filter(MpegEncContext * s); | |
99 | int ff_h263_decode_mba(MpegEncContext *s); | |
100 | void ff_h263_encode_mba(MpegEncContext *s); | |
101 | void ff_init_qscale_tab(MpegEncContext *s); | |
102 | int ff_h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr); | |
103 | void ff_h263_pred_acdc(MpegEncContext * s, int16_t *block, int n); | |
104 | ||
105 | ||
106 | /** | |
107 | * Print picture info if FF_DEBUG_PICT_INFO is set. | |
108 | */ | |
109 | void ff_h263_show_pict_info(MpegEncContext *s); | |
110 | ||
111 | int ff_intel_h263_decode_picture_header(MpegEncContext *s); | |
112 | int ff_h263_decode_mb(MpegEncContext *s, | |
113 | int16_t block[6][64]); | |
114 | ||
115 | /** | |
116 | * Return the value of the 3bit "source format" syntax element. | |
117 | * This represents some standard picture dimensions or indicates that | |
118 | * width&height are explicitly stored later. | |
119 | */ | |
120 | int av_const h263_get_picture_format(int width, int height); | |
121 | ||
122 | void ff_clean_h263_qscales(MpegEncContext *s); | |
123 | int ff_h263_resync(MpegEncContext *s); | |
124 | int ff_h263_get_gob_height(MpegEncContext *s); | |
125 | void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code); | |
126 | ||
127 | ||
128 | static inline int h263_get_motion_length(MpegEncContext * s, int val, int f_code){ | |
129 | int l, bit_size, code; | |
130 | ||
131 | if (val == 0) { | |
132 | return ff_mvtab[0][1]; | |
133 | } else { | |
134 | bit_size = f_code - 1; | |
135 | /* modulo encoding */ | |
136 | l= INT_BIT - 6 - bit_size; | |
137 | val = (val<<l)>>l; | |
138 | val--; | |
139 | code = (val >> bit_size) + 1; | |
140 | ||
141 | return ff_mvtab[code][1] + 1 + bit_size; | |
142 | } | |
143 | } | |
144 | ||
145 | static inline void ff_h263_encode_motion_vector(MpegEncContext * s, int x, int y, int f_code){ | |
146 | if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){ | |
147 | skip_put_bits(&s->pb, | |
148 | h263_get_motion_length(s, x, f_code) | |
149 | +h263_get_motion_length(s, y, f_code)); | |
150 | }else{ | |
151 | ff_h263_encode_motion(s, x, f_code); | |
152 | ff_h263_encode_motion(s, y, f_code); | |
153 | } | |
154 | } | |
155 | ||
156 | static inline int get_p_cbp(MpegEncContext * s, | |
157 | int16_t block[6][64], | |
158 | int motion_x, int motion_y){ | |
159 | int cbp, i; | |
160 | ||
161 | if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) { | |
162 | int best_cbpy_score= INT_MAX; | |
163 | int best_cbpc_score= INT_MAX; | |
164 | int cbpc = (-1), cbpy= (-1); | |
165 | const int offset= (s->mv_type==MV_TYPE_16X16 ? 0 : 16) + (s->dquant ? 8 : 0); | |
166 | const int lambda= s->lambda2 >> (FF_LAMBDA_SHIFT - 6); | |
167 | ||
168 | for(i=0; i<4; i++){ | |
169 | int score= ff_h263_inter_MCBPC_bits[i + offset] * lambda; | |
170 | if(i&1) score += s->coded_score[5]; | |
171 | if(i&2) score += s->coded_score[4]; | |
172 | ||
173 | if(score < best_cbpc_score){ | |
174 | best_cbpc_score= score; | |
175 | cbpc= i; | |
176 | } | |
177 | } | |
178 | ||
179 | for(i=0; i<16; i++){ | |
180 | int score= ff_h263_cbpy_tab[i ^ 0xF][1] * lambda; | |
181 | if(i&1) score += s->coded_score[3]; | |
182 | if(i&2) score += s->coded_score[2]; | |
183 | if(i&4) score += s->coded_score[1]; | |
184 | if(i&8) score += s->coded_score[0]; | |
185 | ||
186 | if(score < best_cbpy_score){ | |
187 | best_cbpy_score= score; | |
188 | cbpy= i; | |
189 | } | |
190 | } | |
191 | cbp= cbpc + 4*cbpy; | |
192 | if ((motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16){ | |
193 | if(best_cbpy_score + best_cbpc_score + 2*lambda >= 0) | |
194 | cbp= 0; | |
195 | } | |
196 | ||
197 | for (i = 0; i < 6; i++) { | |
198 | if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i))&1)==0 ){ | |
199 | s->block_last_index[i]= -1; | |
200 | s->bdsp.clear_block(s->block[i]); | |
201 | } | |
202 | } | |
203 | }else{ | |
204 | cbp= 0; | |
205 | for (i = 0; i < 6; i++) { | |
206 | if (s->block_last_index[i] >= 0) | |
207 | cbp |= 1 << (5 - i); | |
208 | } | |
209 | } | |
210 | return cbp; | |
211 | } | |
212 | ||
213 | static inline void memsetw(short *tab, int val, int n) | |
214 | { | |
215 | int i; | |
216 | for(i=0;i<n;i++) | |
217 | tab[i] = val; | |
218 | } | |
219 | ||
220 | #endif /* AVCODEC_H263_H */ |