Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / h263.h
CommitLineData
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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))
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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
43extern const AVRational ff_h263_pixel_aspect[16];
44extern const uint8_t ff_h263_cbpy_tab[16][2];
45
46extern const uint8_t ff_cbpc_b_tab[4][2];
47
48extern const uint8_t ff_mvtab[33][2];
49
50extern const uint8_t ff_h263_intra_MCBPC_code[9];
51extern const uint8_t ff_h263_intra_MCBPC_bits[9];
52
53extern const uint8_t ff_h263_inter_MCBPC_code[28];
54extern const uint8_t ff_h263_inter_MCBPC_bits[28];
55extern const uint8_t ff_h263_mbtype_b_tab[15][2];
56
57extern VLC ff_h263_intra_MCBPC_vlc;
58extern VLC ff_h263_inter_MCBPC_vlc;
59extern VLC ff_h263_cbpy_vlc;
60
61extern const uint16_t ff_inter_vlc[103][2];
62extern const int8_t ff_inter_level[102];
63extern const int8_t ff_inter_run[102];
64
65extern RLTable ff_h263_rl_inter;
66
67extern RLTable ff_rl_intra_aic;
68
69extern const uint16_t ff_h263_format[8][2];
70extern const uint8_t ff_modified_quant_tab[2][32];
71extern const uint16_t ff_mba_max[6];
72extern const uint8_t ff_mba_length[7];
73
74extern uint8_t ff_h263_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
75
76extern const enum AVPixelFormat ff_h263_hwaccel_pixfmt_list_420[];
77
78
79int ff_h263_decode_motion(MpegEncContext * s, int pred, int f_code);
80av_const int ff_h263_aspect_to_info(AVRational aspect);
81int ff_h263_decode_init(AVCodecContext *avctx);
82int ff_h263_decode_frame(AVCodecContext *avctx,
83 void *data, int *got_frame,
84 AVPacket *avpkt);
85int ff_h263_decode_end(AVCodecContext *avctx);
86void ff_h263_encode_mb(MpegEncContext *s,
87 int16_t block[6][64],
88 int motion_x, int motion_y);
89void ff_h263_encode_picture_header(MpegEncContext *s, int picture_number);
90void ff_h263_encode_gob_header(MpegEncContext * s, int mb_line);
91int16_t *ff_h263_pred_motion(MpegEncContext * s, int block, int dir,
92 int *px, int *py);
93void ff_h263_encode_init(MpegEncContext *s);
94void ff_h263_decode_init_vlc(void);
95int ff_h263_decode_picture_header(MpegEncContext *s);
96int ff_h263_decode_gob_header(MpegEncContext *s);
97void ff_h263_update_motion_val(MpegEncContext * s);
98void ff_h263_loop_filter(MpegEncContext * s);
99int ff_h263_decode_mba(MpegEncContext *s);
100void ff_h263_encode_mba(MpegEncContext *s);
101void ff_init_qscale_tab(MpegEncContext *s);
102int ff_h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr);
103void 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 */
109void ff_h263_show_pict_info(MpegEncContext *s);
110
111int ff_intel_h263_decode_picture_header(MpegEncContext *s);
112int 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 */
120int av_const h263_get_picture_format(int width, int height);
121
122void ff_clean_h263_qscales(MpegEncContext *s);
123int ff_h263_resync(MpegEncContext *s);
124int ff_h263_get_gob_height(MpegEncContext *s);
125void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);
126
127
128static 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
145static 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
156static 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
213static 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 */