Move ff_set_qscale() prototype to mpegvideo.h; it is defined in mpegvideo.c
[libav.git] / libavcodec / h263.h
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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// The defines below define the number of bits that are read at once for
24// reading vlc values. Changing these may improve speed and data cache needs
25// be aware though that decreasing them may need the number of stages that is
26// passed to get_vlc* to be increased.
27#define INTRA_MCBPC_VLC_BITS 6
28#define INTER_MCBPC_VLC_BITS 7
29#define CBPY_VLC_BITS 6
30#define TEX_VLC_BITS 9
31
32extern const AVRational ff_h263_pixel_aspect[16];
101ada9a 33extern const uint8_t ff_h263_cbpy_tab[16][2];
ca334dd1 34
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35extern const uint8_t cbpc_b_tab[4][2];
36
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37extern const uint8_t mvtab[33][2];
38
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39extern const uint8_t ff_h263_intra_MCBPC_code[9];
40extern const uint8_t ff_h263_intra_MCBPC_bits[9];
ca334dd1 41
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42extern const uint8_t ff_h263_inter_MCBPC_code[28];
43extern const uint8_t ff_h263_inter_MCBPC_bits[28];
fc53b6af 44extern const uint8_t h263_mbtype_b_tab[15][2];
ca334dd1 45
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46extern VLC ff_h263_intra_MCBPC_vlc;
47extern VLC ff_h263_inter_MCBPC_vlc;
48extern VLC ff_h263_cbpy_vlc;
ca334dd1 49
101ada9a 50extern RLTable ff_h263_rl_inter;
ca334dd1 51
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52extern RLTable rl_intra_aic;
53
54extern const uint16_t h263_format[8][2];
55extern const uint8_t modified_quant_tab[2][32];
56extern uint16_t ff_mba_max[6];
57extern uint8_t ff_mba_length[7];
58
59extern uint8_t ff_h263_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
60
61
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62int h263_decode_motion(MpegEncContext * s, int pred, int f_code);
63av_const int ff_h263_aspect_to_info(AVRational aspect);
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64int ff_h263_decode_init(AVCodecContext *avctx);
65int ff_h263_decode_frame(AVCodecContext *avctx,
66 void *data, int *data_size,
67 AVPacket *avpkt);
68int ff_h263_decode_end(AVCodecContext *avctx);
69void h263_encode_mb(MpegEncContext *s,
70 DCTELEM block[6][64],
71 int motion_x, int motion_y);
72void h263_encode_picture_header(MpegEncContext *s, int picture_number);
73void h263_encode_gob_header(MpegEncContext * s, int mb_line);
74int16_t *h263_pred_motion(MpegEncContext * s, int block, int dir,
75 int *px, int *py);
76void h263_encode_init(MpegEncContext *s);
77void h263_decode_init_vlc(MpegEncContext *s);
78int h263_decode_picture_header(MpegEncContext *s);
79int ff_h263_decode_gob_header(MpegEncContext *s);
80void ff_h263_update_motion_val(MpegEncContext * s);
81void ff_h263_loop_filter(MpegEncContext * s);
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82int ff_h263_decode_mba(MpegEncContext *s);
83void ff_h263_encode_mba(MpegEncContext *s);
84void ff_init_qscale_tab(MpegEncContext *s);
85int h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr);
86void h263_pred_acdc(MpegEncContext * s, DCTELEM *block, int n);
87
88
89/**
90 * Prints picture info if FF_DEBUG_PICT_INFO is set.
91 */
92void ff_h263_show_pict_info(MpegEncContext *s);
93
94int ff_intel_h263_decode_picture_header(MpegEncContext *s);
95int ff_h263_decode_mb(MpegEncContext *s,
96 DCTELEM block[6][64]);
97
98/**
99 * Returns the value of the 3bit "source format" syntax element.
100 * that represents some standard picture dimensions or indicates that
101 * width&height are explicitly stored later.
102 */
103int av_const h263_get_picture_format(int width, int height);
104
105void ff_clean_h263_qscales(MpegEncContext *s);
106int ff_h263_resync(MpegEncContext *s);
107const uint8_t *ff_h263_find_resync_marker(const uint8_t *p, const uint8_t *end);
108int ff_h263_get_gob_height(MpegEncContext *s);
109void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);
110
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111
112static inline int h263_get_motion_length(MpegEncContext * s, int val, int f_code){
113 int l, bit_size, code;
114
115 if (val == 0) {
116 return mvtab[0][1];
117 } else {
118 bit_size = f_code - 1;
119 /* modulo encoding */
120 l= INT_BIT - 6 - bit_size;
121 val = (val<<l)>>l;
122 val--;
123 code = (val >> bit_size) + 1;
124
125 return mvtab[code][1] + 1 + bit_size;
126 }
127}
128
129static inline void ff_h263_encode_motion_vector(MpegEncContext * s, int x, int y, int f_code){
130 if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){
131 skip_put_bits(&s->pb,
132 h263_get_motion_length(s, x, f_code)
133 +h263_get_motion_length(s, y, f_code));
134 }else{
135 ff_h263_encode_motion(s, x, f_code);
136 ff_h263_encode_motion(s, y, f_code);
137 }
138}
139
140static inline int get_p_cbp(MpegEncContext * s,
141 DCTELEM block[6][64],
142 int motion_x, int motion_y){
143 int cbp, i;
144
145 if(s->flags & CODEC_FLAG_CBP_RD){
146 int best_cbpy_score= INT_MAX;
147 int best_cbpc_score= INT_MAX;
148 int cbpc = (-1), cbpy= (-1);
149 const int offset= (s->mv_type==MV_TYPE_16X16 ? 0 : 16) + (s->dquant ? 8 : 0);
150 const int lambda= s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
151
152 for(i=0; i<4; i++){
101ada9a 153 int score= ff_h263_inter_MCBPC_bits[i + offset] * lambda;
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154 if(i&1) score += s->coded_score[5];
155 if(i&2) score += s->coded_score[4];
156
157 if(score < best_cbpc_score){
158 best_cbpc_score= score;
159 cbpc= i;
160 }
161 }
162
163 for(i=0; i<16; i++){
101ada9a 164 int score= ff_h263_cbpy_tab[i ^ 0xF][1] * lambda;
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165 if(i&1) score += s->coded_score[3];
166 if(i&2) score += s->coded_score[2];
167 if(i&4) score += s->coded_score[1];
168 if(i&8) score += s->coded_score[0];
169
170 if(score < best_cbpy_score){
171 best_cbpy_score= score;
172 cbpy= i;
173 }
174 }
175 cbp= cbpc + 4*cbpy;
176 if ((motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16){
177 if(best_cbpy_score + best_cbpc_score + 2*lambda >= 0)
178 cbp= 0;
179 }
180
181 for (i = 0; i < 6; i++) {
182 if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i))&1)==0 ){
183 s->block_last_index[i]= -1;
184 s->dsp.clear_block(s->block[i]);
185 }
186 }
187 }else{
188 cbp= 0;
189 for (i = 0; i < 6; i++) {
190 if (s->block_last_index[i] >= 0)
191 cbp |= 1 << (5 - i);
192 }
193 }
194 return cbp;
195}
196
197static inline int get_b_cbp(MpegEncContext * s, DCTELEM block[6][64],
198 int motion_x, int motion_y, int mb_type){
199 int cbp=0, i;
200
201 if(s->flags & CODEC_FLAG_CBP_RD){
202 int score=0;
203 const int lambda= s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
204
205 for(i=0; i<6; i++){
206 if(s->coded_score[i] < 0){
207 score += s->coded_score[i];
208 cbp |= 1 << (5 - i);
209 }
210 }
211
212 if(cbp){
213 int zero_score= -6;
214 if ((motion_x | motion_y | s->dquant | mb_type) == 0){
215 zero_score-= 4; //2*MV + mb_type + cbp bit
216 }
217
218 zero_score*= lambda;
219 if(zero_score <= score){
220 cbp=0;
221 }
222 }
223
224 for (i = 0; i < 6; i++) {
225 if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i))&1)==0 ){
226 s->block_last_index[i]= -1;
227 s->dsp.clear_block(s->block[i]);
228 }
229 }
230 }else{
231 for (i = 0; i < 6; i++) {
232 if (s->block_last_index[i] >= 0)
233 cbp |= 1 << (5 - i);
234 }
235 }
236 return cbp;
237}
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238
239static inline void memsetw(short *tab, int val, int n)
240{
241 int i;
242 for(i=0;i<n;i++)
243 tab[i] = val;
244}
ca334dd1 245#endif