hevc: Add names for reserved NAL unit types
[libav.git] / libavcodec / h263.h
1 /*
2 * H.263 internal header
3 *
4 * This file is part of Libav.
5 *
6 * Libav 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 * Libav 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 Libav; 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
25 #include "config.h"
26
27 #include "libavutil/rational.h"
28
29 #include "get_bits.h"
30 #include "mpegvideo.h"
31 #include "h263data.h"
32 #include "rl.h"
33
34 #define FF_ASPECT_EXTENDED 15
35 #define INT_BIT (CHAR_BIT * sizeof(int))
36
37 // The defines below define the number of bits that are read at once for
38 // reading vlc values. Changing these may improve speed and data cache needs
39 // be aware though that decreasing them may need the number of stages that is
40 // passed to get_vlc* to be increased.
41 #define INTRA_MCBPC_VLC_BITS 6
42 #define INTER_MCBPC_VLC_BITS 7
43 #define CBPY_VLC_BITS 6
44 #define TEX_VLC_BITS 9
45
46 #define H263_GOB_HEIGHT(h) ((h) <= 400 ? 1 : (h) <= 800 ? 2 : 4)
47
48 extern VLC ff_h263_intra_MCBPC_vlc;
49 extern VLC ff_h263_inter_MCBPC_vlc;
50 extern VLC ff_h263_cbpy_vlc;
51
52 extern const enum AVPixelFormat ff_h263_hwaccel_pixfmt_list_420[];
53
54
55 int ff_h263_decode_motion(MpegEncContext * s, int pred, int f_code);
56 av_const int ff_h263_aspect_to_info(AVRational aspect);
57 int ff_h263_decode_init(AVCodecContext *avctx);
58 int ff_h263_decode_frame(AVCodecContext *avctx,
59 void *data, int *got_frame,
60 AVPacket *avpkt);
61 int ff_h263_decode_end(AVCodecContext *avctx);
62 void ff_h263_encode_mb(MpegEncContext *s,
63 int16_t block[6][64],
64 int motion_x, int motion_y);
65 void ff_h263_encode_picture_header(MpegEncContext *s, int picture_number);
66 void ff_h263_encode_gob_header(MpegEncContext * s, int mb_line);
67 int16_t *ff_h263_pred_motion(MpegEncContext * s, int block, int dir,
68 int *px, int *py);
69 void ff_h263_encode_init(MpegEncContext *s);
70 void ff_h263_decode_init_vlc(void);
71 int ff_h263_decode_picture_header(MpegEncContext *s);
72 int ff_h263_decode_gob_header(MpegEncContext *s);
73 void ff_h263_update_motion_val(MpegEncContext * s);
74 void ff_h263_loop_filter(MpegEncContext * s);
75 int ff_h263_decode_mba(MpegEncContext *s);
76 void ff_h263_encode_mba(MpegEncContext *s);
77 void ff_init_qscale_tab(MpegEncContext *s);
78 int ff_h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr);
79 void ff_h263_pred_acdc(MpegEncContext * s, int16_t *block, int n);
80
81
82 /**
83 * Print picture info if FF_DEBUG_PICT_INFO is set.
84 */
85 void ff_h263_show_pict_info(MpegEncContext *s);
86
87 int ff_intel_h263_decode_picture_header(MpegEncContext *s);
88 int ff_h263_decode_mb(MpegEncContext *s,
89 int16_t block[6][64]);
90
91 /**
92 * Return the value of the 3-bit "source format" syntax element.
93 * This represents some standard picture dimensions or indicates that
94 * width&height are explicitly stored later.
95 */
96 int av_const h263_get_picture_format(int width, int height);
97
98 void ff_clean_h263_qscales(MpegEncContext *s);
99 int ff_h263_resync(MpegEncContext *s);
100 const uint8_t *ff_h263_find_resync_marker(const uint8_t *restrict p, const uint8_t *restrict end);
101 void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);
102
103
104 static inline int h263_get_motion_length(MpegEncContext * s, int val, int f_code){
105 int l, bit_size, code;
106
107 if (val == 0) {
108 return ff_mvtab[0][1];
109 } else {
110 bit_size = f_code - 1;
111 /* modulo encoding */
112 l= INT_BIT - 6 - bit_size;
113 val = (val<<l)>>l;
114 val--;
115 code = (val >> bit_size) + 1;
116
117 return ff_mvtab[code][1] + 1 + bit_size;
118 }
119 }
120
121 static inline void ff_h263_encode_motion_vector(MpegEncContext * s, int x, int y, int f_code){
122 if (s->avctx->flags2 & AV_CODEC_FLAG2_NO_OUTPUT) {
123 skip_put_bits(&s->pb,
124 h263_get_motion_length(s, x, f_code)
125 +h263_get_motion_length(s, y, f_code));
126 }else{
127 ff_h263_encode_motion(s, x, f_code);
128 ff_h263_encode_motion(s, y, f_code);
129 }
130 }
131
132 static inline int get_p_cbp(MpegEncContext * s,
133 int16_t block[6][64],
134 int motion_x, int motion_y){
135 int cbp, i;
136
137 if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) {
138 int best_cbpy_score= INT_MAX;
139 int best_cbpc_score= INT_MAX;
140 int cbpc = (-1), cbpy= (-1);
141 const int offset= (s->mv_type==MV_TYPE_16X16 ? 0 : 16) + (s->dquant ? 8 : 0);
142 const int lambda= s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
143
144 for(i=0; i<4; i++){
145 int score= ff_h263_inter_MCBPC_bits[i + offset] * lambda;
146 if(i&1) score += s->coded_score[5];
147 if(i&2) score += s->coded_score[4];
148
149 if(score < best_cbpc_score){
150 best_cbpc_score= score;
151 cbpc= i;
152 }
153 }
154
155 for(i=0; i<16; i++){
156 int score= ff_h263_cbpy_tab[i ^ 0xF][1] * lambda;
157 if(i&1) score += s->coded_score[3];
158 if(i&2) score += s->coded_score[2];
159 if(i&4) score += s->coded_score[1];
160 if(i&8) score += s->coded_score[0];
161
162 if(score < best_cbpy_score){
163 best_cbpy_score= score;
164 cbpy= i;
165 }
166 }
167 cbp= cbpc + 4*cbpy;
168 if ((motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16){
169 if(best_cbpy_score + best_cbpc_score + 2*lambda >= 0)
170 cbp= 0;
171 }
172
173 for (i = 0; i < 6; i++) {
174 if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i))&1)==0 ){
175 s->block_last_index[i]= -1;
176 s->bdsp.clear_block(s->block[i]);
177 }
178 }
179 }else{
180 cbp= 0;
181 for (i = 0; i < 6; i++) {
182 if (s->block_last_index[i] >= 0)
183 cbp |= 1 << (5 - i);
184 }
185 }
186 return cbp;
187 }
188
189 #endif /* AVCODEC_H263_H */