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 RLTable ff_mpeg4_rl_intra;
68 /* Note this is identical to the intra rvlc except that it is reordered. */
69 extern RLTable ff_rvlc_rl_inter;
70 extern RLTable ff_rvlc_rl_intra;
72 extern const uint16_t ff_sprite_trajectory_tab[15][2];
73 extern const uint8_t ff_mb_type_b_tab[4][2];
75 /* these matrixes will be permuted for the idct */
76 extern const int16_t ff_mpeg4_default_intra_matrix[64];
77 extern const int16_t ff_mpeg4_default_non_intra_matrix[64];
79 extern const uint8_t ff_mpeg4_y_dc_scale_table[32];
80 extern const uint8_t ff_mpeg4_c_dc_scale_table[32];
81 extern const uint16_t ff_mpeg4_resync_prefix[8];
83 extern const uint8_t ff_mpeg4_dc_threshold[8];
85 void ff_mpeg4_encode_mb(MpegEncContext *s,
87 int motion_x, int motion_y);
88 void ff_mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n,
90 void ff_set_mpeg4_time(MpegEncContext * s);
91 void ff_mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
93 int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb);
94 void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);
95 void ff_mpeg4_clean_buffers(MpegEncContext *s);
96 void ff_mpeg4_stuffing(PutBitContext * pbc);
97 void ff_mpeg4_init_partitions(MpegEncContext *s);
98 void ff_mpeg4_merge_partitions(MpegEncContext *s);
99 void ff_clean_mpeg4_qscales(MpegEncContext *s);
100 int ff_mpeg4_decode_partitions(MpegEncContext *s);
101 int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
102 int ff_mpeg4_decode_video_packet_header(MpegEncContext *s);
103 void ff_mpeg4_init_direct_mv(MpegEncContext *s);
107 * @return the mb_type
109 int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
111 extern uint8_t ff_mpeg4_static_rl_table_store[3][2][2*MAX_RUN + MAX_LEVEL + 3];
114 #if 0 //3IV1 is quite rare and it slows things down a tiny bit
115 #define IS_3IV1 s->codec_tag == AV_RL32("3IV1")
123 * encoding quantized level -> quantized diff
124 * decoding quantized diff -> quantized level
125 * @param n block index (0-3 are luma, 4-5 are chroma)
126 * @param dir_ptr pointer to an integer where the prediction direction will be stored
128 static inline int ff_mpeg4_pred_dc(MpegEncContext * s, int n, int level, int *dir_ptr, int encoding)
130 int a, b, c, wrap, pred, scale, ret;
133 /* find prediction */
135 scale = s->y_dc_scale;
137 scale = s->c_dc_scale;
142 wrap= s->block_wrap[n];
143 dc_val = s->dc_val[0] + s->block_index[n];
149 b = dc_val[ - 1 - wrap];
152 /* outside slice handling (we can't do that by memset as we need the dc for error resilience) */
153 if(s->first_slice_line && n!=3){
155 if(n!=1 && s->mb_x == s->resync_mb_x) b=a= 1024;
157 if(s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y+1){
158 if(n==0 || n==4 || n==5)
162 if (abs(a - b) < abs(b - c)) {
164 *dir_ptr = 1; /* top */
167 *dir_ptr = 0; /* left */
169 /* we assume pred is positive */
170 pred = FASTDIV((pred + (scale >> 1)), scale);
177 if(s->err_recognition&(AV_EF_BITSTREAM|AV_EF_AGGRESSIVE)){
179 av_log(s->avctx, AV_LOG_ERROR, "dc<0 at %dx%d\n", s->mb_x, s->mb_y);
182 if(level*scale > 2048 + scale){
183 av_log(s->avctx, AV_LOG_ERROR, "dc overflow at %dx%d\n", s->mb_x, s->mb_y);
192 else if(!(s->workaround_bugs&FF_BUG_DC_CLIP))
199 #endif /* AVCODEC_MPEG4VIDEO_H */