2 * MPEG4 encoder/decoder internal header.
3 * Copyright (c) 2000,2001 Fabrice Bellard
4 * Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #ifndef AVCODEC_MPEG4VIDEO_H
24 #define AVCODEC_MPEG4VIDEO_H
28 #include "mpegvideo.h"
34 #define BIN_ONLY_SHAPE 2
37 #define SIMPLE_VO_TYPE 1
38 #define CORE_VO_TYPE 3
39 #define MAIN_VO_TYPE 4
40 #define NBIT_VO_TYPE 5
41 #define ARTS_VO_TYPE 10
42 #define ACE_VO_TYPE 12
43 #define ADV_SIMPLE_VO_TYPE 17
46 #define EXTENDED_PAR 15
48 //vol_sprite_usage / sprite_enable
49 #define STATIC_SPRITE 1
52 #define MOTION_MARKER 0x1F001
53 #define DC_MARKER 0x6B001
55 #define VOS_STARTCODE 0x1B0
56 #define USER_DATA_STARTCODE 0x1B2
57 #define GOP_STARTCODE 0x1B3
58 #define VISUAL_OBJ_STARTCODE 0x1B5
59 #define VOP_STARTCODE 0x1B6
61 /* dc encoding for mpeg4 */
62 extern const uint8_t ff_mpeg4_DCtab_lum[13][2];
63 extern const uint8_t ff_mpeg4_DCtab_chrom[13][2];
65 extern const uint16_t ff_mpeg4_intra_vlc[103][2];
66 extern const int8_t ff_mpeg4_intra_level[102];
67 extern const int8_t ff_mpeg4_intra_run[102];
69 extern RLTable ff_mpeg4_rl_intra;
71 /* Note this is identical to the intra rvlc except that it is reordered. */
72 extern RLTable ff_rvlc_rl_inter;
73 extern RLTable ff_rvlc_rl_intra;
75 extern const uint16_t ff_sprite_trajectory_tab[15][2];
76 extern const uint8_t ff_mb_type_b_tab[4][2];
78 /* these matrixes will be permuted for the idct */
79 extern const int16_t ff_mpeg4_default_intra_matrix[64];
80 extern const int16_t ff_mpeg4_default_non_intra_matrix[64];
82 extern const uint8_t ff_mpeg4_y_dc_scale_table[32];
83 extern const uint8_t ff_mpeg4_c_dc_scale_table[32];
84 extern const uint16_t ff_mpeg4_resync_prefix[8];
86 extern const uint8_t ff_mpeg4_dc_threshold[8];
88 void ff_mpeg4_encode_mb(MpegEncContext *s,
90 int motion_x, int motion_y);
91 void ff_mpeg4_pred_ac(MpegEncContext * s, int16_t *block, int n,
93 void ff_set_mpeg4_time(MpegEncContext * s);
94 void ff_mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
96 int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb);
97 void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);
98 void ff_mpeg4_clean_buffers(MpegEncContext *s);
99 void ff_mpeg4_stuffing(PutBitContext * pbc);
100 void ff_mpeg4_init_partitions(MpegEncContext *s);
101 void ff_mpeg4_merge_partitions(MpegEncContext *s);
102 void ff_clean_mpeg4_qscales(MpegEncContext *s);
103 int ff_mpeg4_decode_partitions(MpegEncContext *s);
104 int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
105 int ff_mpeg4_decode_video_packet_header(MpegEncContext *s);
106 void ff_mpeg4_init_direct_mv(MpegEncContext *s);
107 void ff_mpeg4videodec_static_init(void);
111 * @return the mb_type
113 int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
115 extern uint8_t ff_mpeg4_static_rl_table_store[3][2][2*MAX_RUN + MAX_LEVEL + 3];
118 #if 0 //3IV1 is quite rare and it slows things down a tiny bit
119 #define IS_3IV1 s->codec_tag == AV_RL32("3IV1")
127 * encoding quantized level -> quantized diff
128 * decoding quantized diff -> quantized level
129 * @param n block index (0-3 are luma, 4-5 are chroma)
130 * @param dir_ptr pointer to an integer where the prediction direction will be stored
132 static inline int ff_mpeg4_pred_dc(MpegEncContext * s, int n, int level, int *dir_ptr, int encoding)
134 int a, b, c, wrap, pred, scale, ret;
137 /* find prediction */
139 scale = s->y_dc_scale;
141 scale = s->c_dc_scale;
146 wrap= s->block_wrap[n];
147 dc_val = s->dc_val[0] + s->block_index[n];
153 b = dc_val[ - 1 - wrap];
156 /* outside slice handling (we can't do that by memset as we need the dc for error resilience) */
157 if(s->first_slice_line && n!=3){
159 if(n!=1 && s->mb_x == s->resync_mb_x) b=a= 1024;
161 if(s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y+1){
162 if(n==0 || n==4 || n==5)
166 if (abs(a - b) < abs(b - c)) {
168 *dir_ptr = 1; /* top */
171 *dir_ptr = 0; /* left */
173 /* we assume pred is positive */
174 pred = FASTDIV((pred + (scale >> 1)), scale);
181 if(s->err_recognition&(AV_EF_BITSTREAM|AV_EF_AGGRESSIVE)){
183 av_log(s->avctx, AV_LOG_ERROR, "dc<0 at %dx%d\n", s->mb_x, s->mb_y);
186 if(level*scale > 2048 + scale){
187 av_log(s->avctx, AV_LOG_ERROR, "dc overflow at %dx%d\n", s->mb_x, s->mb_y);
196 else if(!(s->workaround_bugs&FF_BUG_DC_CLIP))
203 #endif /* AVCODEC_MPEG4VIDEO_H */