mpegvideo: split ff_draw_horiz_band().
[libav.git] / libavcodec / h264.h
CommitLineData
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1/*
2 * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
3 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4 *
2912e87a 5 * This file is part of Libav.
26b4fe82 6 *
2912e87a 7 * Libav is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
2912e87a 12 * Libav is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
2912e87a 18 * License along with Libav; if not, write to the Free Software
26b4fe82 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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20 */
21
22/**
ba87f080 23 * @file
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24 * H.264 / AVC / MPEG4 part10 codec.
25 * @author Michael Niedermayer <michaelni@gmx.at>
26 */
27
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28#ifndef AVCODEC_H264_H
29#define AVCODEC_H264_H
26b4fe82 30
19769ece 31#include "libavutil/intreadwrite.h"
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32#include "cabac.h"
33#include "mpegvideo.h"
79dad2a9 34#include "h264chroma.h"
4693b031 35#include "h264dsp.h"
c92a30bb 36#include "h264pred.h"
e9d81735 37#include "h264qpel.h"
e1e94902 38#include "rectangle.h"
26b4fe82 39
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40#define MAX_SPS_COUNT 32
41#define MAX_PPS_COUNT 256
26b4fe82 42
be545b8a 43#define MAX_MMCO_COUNT 66
26b4fe82 44
be545b8a 45#define MAX_DELAYED_PIC_COUNT 16
64b9d48f 46
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47/* Compiling in interlaced support reduces the speed
48 * of progressive decoding by about 2%. */
49#define ALLOW_INTERLACE
50
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51#define FMO 0
52
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53/**
54 * The maximum number of slices supported by the decoder.
55 * must be a power of 2
56 */
57#define MAX_SLICES 16
58
26b4fe82 59#ifdef ALLOW_INTERLACE
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60#define MB_MBAFF h->mb_mbaff
61#define MB_FIELD h->mb_field_decoding_flag
26b4fe82 62#define FRAME_MBAFF h->mb_aff_frame
d6c52130 63#define FIELD_PICTURE (s->picture_structure != PICT_FRAME)
556f8a06 64#define LEFT_MBS 2
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65#define LTOP 0
66#define LBOT 1
67#define LEFT(i) (i)
26b4fe82 68#else
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69#define MB_MBAFF 0
70#define MB_FIELD 0
71#define FRAME_MBAFF 0
bbb3edb8 72#define FIELD_PICTURE 0
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73#undef IS_INTERLACED
74#define IS_INTERLACED(mb_type) 0
556f8a06 75#define LEFT_MBS 1
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76#define LTOP 0
77#define LBOT 0
78#define LEFT(i) 0
26b4fe82 79#endif
f3e53d9f 80#define FIELD_OR_MBAFF_PICTURE (FRAME_MBAFF || FIELD_PICTURE)
26b4fe82 81
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82#ifndef CABAC
83#define CABAC h->pps.cabac
84#endif
85
76741b0e 86#define CHROMA422 (h->sps.chroma_format_idc == 2)
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87#define CHROMA444 (h->sps.chroma_format_idc == 3)
88
be545b8a 89#define EXTENDED_SAR 255
44ee6135 90
be545b8a 91#define MB_TYPE_REF0 MB_TYPE_ACPRED // dirty but it fits in 16 bit
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92#define MB_TYPE_8x8DCT 0x01000000
93#define IS_REF0(a) ((a) & MB_TYPE_REF0)
94#define IS_8x8DCT(a) ((a) & MB_TYPE_8x8DCT)
95
be545b8a 96#define QP_MAX_NUM (51 + 2 * 6) // The maximum supported qp
ea6f00c4 97
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98/* NAL unit types */
99enum {
be545b8a 100 NAL_SLICE = 1,
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101 NAL_DPA,
102 NAL_DPB,
103 NAL_DPC,
104 NAL_IDR_SLICE,
105 NAL_SEI,
106 NAL_SPS,
107 NAL_PPS,
108 NAL_AUD,
109 NAL_END_SEQUENCE,
110 NAL_END_STREAM,
111 NAL_FILLER_DATA,
112 NAL_SPS_EXT,
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113 NAL_AUXILIARY_SLICE = 19,
114 NAL_FF_IGNORE = 0xff0f001,
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115};
116
26b4fe82 117/**
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118 * SEI message types
119 */
120typedef enum {
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121 SEI_BUFFERING_PERIOD = 0, ///< buffering period (H.264, D.1.1)
122 SEI_TYPE_PIC_TIMING = 1, ///< picture timing
123 SEI_TYPE_USER_DATA_UNREGISTERED = 5, ///< unregistered user data
124 SEI_TYPE_RECOVERY_POINT = 6 ///< recovery point (frame # to decoder sync)
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125} SEI_Type;
126
127/**
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128 * pic_struct in picture timing SEI message
129 */
130typedef enum {
131 SEI_PIC_STRUCT_FRAME = 0, ///< 0: %frame
132 SEI_PIC_STRUCT_TOP_FIELD = 1, ///< 1: top field
133 SEI_PIC_STRUCT_BOTTOM_FIELD = 2, ///< 2: bottom field
134 SEI_PIC_STRUCT_TOP_BOTTOM = 3, ///< 3: top field, bottom field, in that order
135 SEI_PIC_STRUCT_BOTTOM_TOP = 4, ///< 4: bottom field, top field, in that order
136 SEI_PIC_STRUCT_TOP_BOTTOM_TOP = 5, ///< 5: top field, bottom field, top field repeated, in that order
137 SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM = 6, ///< 6: bottom field, top field, bottom field repeated, in that order
138 SEI_PIC_STRUCT_FRAME_DOUBLING = 7, ///< 7: %frame doubling
139 SEI_PIC_STRUCT_FRAME_TRIPLING = 8 ///< 8: %frame tripling
140} SEI_PicStructType;
141
142/**
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143 * Sequence parameter set
144 */
be545b8a 145typedef struct SPS {
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146 int profile_idc;
147 int level_idc;
0af6967e 148 int chroma_format_idc;
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149 int transform_bypass; ///< qpprime_y_zero_transform_bypass_flag
150 int log2_max_frame_num; ///< log2_max_frame_num_minus4 + 4
151 int poc_type; ///< pic_order_cnt_type
152 int log2_max_poc_lsb; ///< log2_max_pic_order_cnt_lsb_minus4
153 int delta_pic_order_always_zero_flag;
154 int offset_for_non_ref_pic;
155 int offset_for_top_to_bottom_field;
156 int poc_cycle_length; ///< num_ref_frames_in_pic_order_cnt_cycle
157 int ref_frame_count; ///< num_ref_frames
158 int gaps_in_frame_num_allowed_flag;
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159 int mb_width; ///< pic_width_in_mbs_minus1 + 1
160 int mb_height; ///< pic_height_in_map_units_minus1 + 1
26b4fe82 161 int frame_mbs_only_flag;
be545b8a 162 int mb_aff; ///< mb_adaptive_frame_field_flag
26b4fe82 163 int direct_8x8_inference_flag;
be545b8a 164 int crop; ///< frame_cropping_flag
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165 unsigned int crop_left; ///< frame_cropping_rect_left_offset
166 unsigned int crop_right; ///< frame_cropping_rect_right_offset
167 unsigned int crop_top; ///< frame_cropping_rect_top_offset
168 unsigned int crop_bottom; ///< frame_cropping_rect_bottom_offset
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169 int vui_parameters_present_flag;
170 AVRational sar;
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171 int video_signal_type_present_flag;
172 int full_range;
173 int colour_description_present_flag;
174 enum AVColorPrimaries color_primaries;
175 enum AVColorTransferCharacteristic color_trc;
176 enum AVColorSpace colorspace;
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177 int timing_info_present_flag;
178 uint32_t num_units_in_tick;
179 uint32_t time_scale;
180 int fixed_frame_rate_flag;
be545b8a 181 short offset_for_ref_frame[256]; // FIXME dyn aloc?
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182 int bitstream_restriction_flag;
183 int num_reorder_frames;
184 int scaling_matrix_present;
185 uint8_t scaling_matrix4[6][16];
c90b9442 186 uint8_t scaling_matrix8[6][64];
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187 int nal_hrd_parameters_present_flag;
188 int vcl_hrd_parameters_present_flag;
189 int pic_struct_present_flag;
190 int time_offset_length;
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191 int cpb_cnt; ///< See H.264 E.1.2
192 int initial_cpb_removal_delay_length; ///< initial_cpb_removal_delay_length_minus1 + 1
193 int cpb_removal_delay_length; ///< cpb_removal_delay_length_minus1 + 1
194 int dpb_output_delay_length; ///< dpb_output_delay_length_minus1 + 1
195 int bit_depth_luma; ///< bit_depth_luma_minus8 + 8
196 int bit_depth_chroma; ///< bit_depth_chroma_minus8 + 8
197 int residual_color_transform_flag; ///< residual_colour_transform_flag
198 int constraint_set_flags; ///< constraint_set[0-3]_flag
072be3e8 199 int new; ///< flag to keep track if the decoder context needs re-init due to changed SPS
be545b8a 200} SPS;
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201
202/**
203 * Picture parameter set
204 */
be545b8a 205typedef struct PPS {
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206 unsigned int sps_id;
207 int cabac; ///< entropy_coding_mode_flag
208 int pic_order_present; ///< pic_order_present_flag
209 int slice_group_count; ///< num_slice_groups_minus1 + 1
210 int mb_slice_group_map_type;
211 unsigned int ref_count[2]; ///< num_ref_idx_l0/1_active_minus1 + 1
212 int weighted_pred; ///< weighted_pred_flag
213 int weighted_bipred_idc;
214 int init_qp; ///< pic_init_qp_minus26 + 26
215 int init_qs; ///< pic_init_qs_minus26 + 26
4691a77d 216 int chroma_qp_index_offset[2];
26b4fe82 217 int deblocking_filter_parameters_present; ///< deblocking_filter_parameters_present_flag
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218 int constrained_intra_pred; ///< constrained_intra_pred_flag
219 int redundant_pic_cnt_present; ///< redundant_pic_cnt_present_flag
220 int transform_8x8_mode; ///< transform_8x8_mode_flag
26b4fe82 221 uint8_t scaling_matrix4[6][16];
c90b9442 222 uint8_t scaling_matrix8[6][64];
be545b8a 223 uint8_t chroma_qp_table[2][64]; ///< pre-scaled (with chroma_qp_index_offset) version of qp_table
4691a77d 224 int chroma_qp_diff;
be545b8a 225} PPS;
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226
227/**
228 * Memory management control operation opcode.
229 */
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230typedef enum MMCOOpcode {
231 MMCO_END = 0,
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232 MMCO_SHORT2UNUSED,
233 MMCO_LONG2UNUSED,
234 MMCO_SHORT2LONG,
235 MMCO_SET_MAX_LONG,
236 MMCO_RESET,
237 MMCO_LONG,
238} MMCOOpcode;
239
240/**
241 * Memory management control operation.
242 */
be545b8a 243typedef struct MMCO {
26b4fe82 244 MMCOOpcode opcode;
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245 int short_pic_num; ///< pic_num without wrapping (pic_num & max_pic_num)
246 int long_arg; ///< index, pic_num, or num long refs depending on opcode
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247} MMCO;
248
249/**
250 * H264Context
251 */
be545b8a 252typedef struct H264Context {
26b4fe82 253 MpegEncContext s;
4693b031 254 H264DSPContext h264dsp;
79dad2a9 255 H264ChromaContext h264chroma;
e9d81735 256 H264QpelContext h264qpel;
6e3ef511 257 int pixel_shift; ///< 0 for 8-bit H264, 1 for high-bit-depth H264
be545b8a 258 int chroma_qp[2]; // QPc
26b4fe82 259
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260 int qp_thresh; ///< QP threshold to skip loopfilter
261
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262 int prev_mb_skipped;
263 int next_mb_skipped;
264
be545b8a 265 // prediction stuff
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266 int chroma_pred_mode;
267 int intra16x16_pred_mode;
268
c1bb66ac 269 int topleft_mb_xy;
26b4fe82 270 int top_mb_xy;
c1bb66ac 271 int topright_mb_xy;
556f8a06 272 int left_mb_xy[LEFT_MBS];
26b4fe82 273
c1bb66ac 274 int topleft_type;
99344d43 275 int top_type;
c1bb66ac 276 int topright_type;
556f8a06 277 int left_type[LEFT_MBS];
99344d43 278
be545b8a 279 const uint8_t *left_block;
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280 int topleft_partition;
281
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282 int8_t intra4x4_pred_mode_cache[5 * 8];
283 int8_t(*intra4x4_pred_mode);
c92a30bb 284 H264PredContext hpc;
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285 unsigned int topleft_samples_available;
286 unsigned int top_samples_available;
287 unsigned int topright_samples_available;
288 unsigned int left_samples_available;
be545b8a 289 uint8_t (*top_borders[2])[(16 * 3) * 2];
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290
291 /**
292 * non zero coeff count cache.
293 * is 64 if not available.
294 */
be545b8a 295 DECLARE_ALIGNED(8, uint8_t, non_zero_count_cache)[15 * 8];
b6303e6d 296
c90b9442 297 uint8_t (*non_zero_count)[48];
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298
299 /**
300 * Motion vector cache.
301 */
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302 DECLARE_ALIGNED(16, int16_t, mv_cache)[2][5 * 8][2];
303 DECLARE_ALIGNED(8, int8_t, ref_cache)[2][5 * 8];
304#define LIST_NOT_USED -1 // FIXME rename?
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305#define PART_NOT_AVAILABLE -2
306
307 /**
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308 * number of neighbors (top and/or left) that used 8x8 dct
309 */
310 int neighbor_transform_size;
311
312 /**
313 * block_offset[ 0..23] for frame macroblocks
314 * block_offset[24..47] for field macroblocks
315 */
be545b8a 316 int block_offset[2 * (16 * 3)];
26b4fe82 317
be545b8a 318 uint32_t *mb2b_xy; // FIXME are these 4 a good idea?
d43c1922 319 uint32_t *mb2br_xy;
be545b8a 320 int b_stride; // FIXME use s->b4_stride
26b4fe82 321
be545b8a 322 int mb_linesize; ///< may be equal to s->linesize or s->linesize * 2, for mbaff
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323 int mb_uvlinesize;
324
325 int emu_edge_width;
326 int emu_edge_height;
327
072be3e8 328 unsigned current_sps_id; ///< id of the current SPS
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329 SPS sps; ///< current sps
330
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331 /**
332 * current pps
333 */
be545b8a 334 PPS pps; // FIXME move to Picture perhaps? (->no) do we need that?
26b4fe82 335
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336 uint32_t dequant4_buffer[6][QP_MAX_NUM + 1][16]; // FIXME should these be moved down?
337 uint32_t dequant8_buffer[6][QP_MAX_NUM + 1][64];
338 uint32_t(*dequant4_coeff[6])[16];
339 uint32_t(*dequant8_coeff[6])[64];
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340
341 int slice_num;
be545b8a 342 uint16_t *slice_table; ///< slice_table_base + 2*mb_stride + 1
26b4fe82 343 int slice_type;
be545b8a 344 int slice_type_nos; ///< S free slice type (SI/SP are remapped to I/P)
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345 int slice_type_fixed;
346
be545b8a 347 // interlacing specific flags
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348 int mb_aff_frame;
349 int mb_field_decoding_flag;
be545b8a 350 int mb_mbaff; ///< mb_aff_frame && mb_field_decoding_flag
26b4fe82 351
84dc2d8a 352 DECLARE_ALIGNED(8, uint16_t, sub_mb_type)[4];
26b4fe82 353
be545b8a 354 // Weighted pred stuff
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355 int use_weight;
356 int use_weight_chroma;
357 int luma_log2_weight_denom;
358 int chroma_log2_weight_denom;
be545b8a 359 // The following 2 can be changed to int8_t but that causes 10cpu cycles speedloss
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360 int luma_weight[48][2][2];
361 int chroma_weight[48][2][2][2];
1052b76f 362 int implicit_weight[48][48][2];
26b4fe82 363
26b4fe82 364 int direct_spatial_mv_pred;
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365 int col_parity;
366 int col_fieldoff;
73ad2c2f 367 int dist_scale_factor[32];
8b1fd554 368 int dist_scale_factor_field[2][32];
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369 int map_col_to_list0[2][16 + 32];
370 int map_col_to_list0_field[2][2][16 + 32];
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371
372 /**
373 * num_ref_idx_l0/1_active_minus1 + 1
374 */
be545b8a 375 unsigned int ref_count[2]; ///< counts frames or fields, depending on current mb mode
26b4fe82 376 unsigned int list_count;
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377 uint8_t *list_counts; ///< Array of list_count per MB specifying the slice type
378 Picture ref_list[2][48]; /**< 0..15: frame refs, 16..47: mbaff field refs.
379 * Reordered version of default_ref_list
380 * according to picture reordering in slice header */
381 int ref2frm[MAX_SLICES][2][64]; ///< reference to frame number lists, used in the loop filter, the first 2 are for -2,-1
26b4fe82 382
be545b8a 383 // data partitioning
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384 GetBitContext intra_gb;
385 GetBitContext inter_gb;
386 GetBitContext *intra_gb_ptr;
387 GetBitContext *inter_gb_ptr;
388
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389 DECLARE_ALIGNED(16, int16_t, mb)[16 * 48 * 2]; ///< as a dct coeffecient is int32_t in high depth, we need to reserve twice the space.
390 DECLARE_ALIGNED(16, int16_t, mb_luma_dc)[3][16 * 2];
391 int16_t mb_padding[256 * 2]; ///< as mb is addressed by scantable[i] and scantable is uint8_t we can either check that i is not too large or ensure that there is some unused stuff after mb
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392
393 /**
394 * Cabac
395 */
396 CABACContext cabac;
be545b8a 397 uint8_t cabac_state[1024];
26b4fe82 398
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399 /* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0, 1, 2), 0x0? luma_cbp */
400 uint16_t *cbp_table;
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401 int cbp;
402 int top_cbp;
403 int left_cbp;
404 /* chroma_pred_mode for i4x4 or i16x16, else 0 */
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405 uint8_t *chroma_pred_mode_table;
406 int last_qscale_diff;
407 uint8_t (*mvd_table[2])[2];
408 DECLARE_ALIGNED(16, uint8_t, mvd_cache)[2][5 * 8][2];
409 uint8_t *direct_table;
410 uint8_t direct_cache[5 * 8];
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411
412 uint8_t zigzag_scan[16];
413 uint8_t zigzag_scan8x8[64];
414 uint8_t zigzag_scan8x8_cavlc[64];
415 uint8_t field_scan[16];
416 uint8_t field_scan8x8[64];
417 uint8_t field_scan8x8_cavlc[64];
418 const uint8_t *zigzag_scan_q0;
419 const uint8_t *zigzag_scan8x8_q0;
420 const uint8_t *zigzag_scan8x8_cavlc_q0;
421 const uint8_t *field_scan_q0;
422 const uint8_t *field_scan8x8_q0;
423 const uint8_t *field_scan8x8_cavlc_q0;
424
425 int x264_build;
afebe2f7 426
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427 int mb_xy;
428
429 int is_complex;
430
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431 // deblock
432 int deblocking_filter; ///< disable_deblocking_filter_idc with 1 <-> 0
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433 int slice_alpha_c0_offset;
434 int slice_beta_offset;
435
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436 // =============================================================
437 // Things below are not used in the MB or more inner code
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438
439 int nal_ref_idc;
440 int nal_unit_type;
441 uint8_t *rbsp_buffer[2];
442 unsigned int rbsp_buffer_size[2];
443
444 /**
445 * Used to parse AVC variant of h264
446 */
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447 int is_avc; ///< this flag is != 0 if codec is avc1
448 int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)
449 int got_first; ///< this flag is != 0 if we've parsed a frame
bd8868e0 450
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451 int context_reinitialized;
452
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453 SPS *sps_buffers[MAX_SPS_COUNT];
454 PPS *pps_buffers[MAX_PPS_COUNT];
455
be545b8a 456 int dequant_coeff_pps; ///< reinit tables when pps changes
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457
458 uint16_t *slice_table_base;
459
be545b8a 460 // POC stuff
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461 int poc_lsb;
462 int poc_msb;
463 int delta_poc_bottom;
464 int delta_poc[2];
465 int frame_num;
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466 int prev_poc_msb; ///< poc_msb of the last reference pic for POC type 0
467 int prev_poc_lsb; ///< poc_lsb of the last reference pic for POC type 0
468 int frame_num_offset; ///< for POC type 2
469 int prev_frame_num_offset; ///< for POC type 2
470 int prev_frame_num; ///< frame_num of the last pic for POC type 1/2
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471
472 /**
be545b8a 473 * frame_num for frames or 2 * frame_num + 1 for field pics.
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474 */
475 int curr_pic_num;
476
477 /**
be545b8a 478 * max_frame_num or 2 * max_frame_num for field pics.
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479 */
480 int max_pic_num;
481
482 int redundant_pic_count;
483
940b8b58 484 Picture default_ref_list[2][32]; ///< base reference list for all slices of a coded picture
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485 Picture *short_ref[32];
486 Picture *long_ref[32];
be545b8a 487 Picture *delayed_pic[MAX_DELAYED_PIC_COUNT + 2]; // FIXME size?
ea2bb12e 488 int last_pocs[MAX_DELAYED_PIC_COUNT];
6a9c8594 489 Picture *next_output_pic;
bd8868e0 490 int outputed_poc;
6a9c8594 491 int next_outputed_poc;
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492
493 /**
494 * memory management control operations buffer.
495 */
496 MMCO mmco[MAX_MMCO_COUNT];
497 int mmco_index;
adedd840 498 int mmco_reset;
bd8868e0 499
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500 int long_ref_count; ///< number of actual long term references
501 int short_ref_count; ///< number of actual short term references
bd8868e0 502
be545b8a 503 int cabac_init_idc;
bd8868e0 504
afebe2f7 505 /**
21a19b79 506 * @name Members for slice based multithreading
afebe2f7
507 * @{
508 */
509 struct H264Context *thread_context[MAX_THREADS];
510
511 /**
512 * current slice number, used to initalize slice_num of each thread/context
513 */
514 int current_slice;
515
516 /**
517 * Max number of threads / contexts.
518 * This is equal to AVCodecContext.thread_count unless
519 * multithreaded decoding is impossible, in which case it is
520 * reduced to 1.
521 */
522 int max_contexts;
523
524 /**
525 * 1 if the single thread fallback warning has already been
526 * displayed, 0 otherwise.
527 */
528 int single_decode_warning;
529
530 int last_slice_type;
531 /** @} */
532
b09a7c05
533 /**
534 * pic_struct in picture timing SEI message
535 */
536 SEI_PicStructType sei_pic_struct;
89db0bae 537
37a558fe 538 /**
b19d493f
HY
539 * Complement sei_pic_struct
540 * SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced frames.
541 * However, soft telecined frames may have these values.
542 * This is used in an attempt to flag soft telecine progressive.
543 */
544 int prev_interlaced_frame;
545
546 /**
70e01da3
IS
547 * Bit set of clock types for fields/frames in picture timing SEI message.
548 * For each found ct_type, appropriate bit is set (e.g., bit 1 for
549 * interlaced).
550 */
551 int sei_ct_type;
552
553 /**
ff594f81
IS
554 * dpb_output_delay in picture timing SEI message, see H.264 C.2.2
555 */
556 int sei_dpb_output_delay;
557
558 /**
cf6065ca
IS
559 * cpb_removal_delay in picture timing SEI message, see H.264 C.1.2
560 */
561 int sei_cpb_removal_delay;
562
563 /**
37a558fe
IS
564 * recovery_frame_cnt from SEI message
565 *
566 * Set to -1 if no recovery point SEI message found or to number of frames
567 * before playback synchronizes. Frames having recovery point are key
568 * frames.
569 */
570 int sei_recovery_frame_cnt;
571
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DB
572 int luma_weight_flag[2]; ///< 7.4.3.2 luma_weight_lX_flag
573 int chroma_weight_flag[2]; ///< 7.4.3.2 chroma_weight_lX_flag
2ea89d92
IS
574
575 // Timestamp stuff
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DB
576 int sei_buffering_period_present; ///< Buffering period SEI flag
577 int initial_cpb_removal_delay[32]; ///< Initial timestamps for CPBs
76741b0e
BC
578
579 int cur_chroma_format_idc;
a394959b 580 uint8_t *bipred_scratchpad;
be545b8a 581} H264Context;
26b4fe82 582
be545b8a 583extern const uint8_t ff_h264_chroma_qp[3][QP_MAX_NUM + 1]; ///< One chroma qp table for each supported bit depth (8, 9, 10).
0becb078 584extern const uint16_t ff_h264_mb_sizes[4];
889fce8e 585
1790a5e9
IS
586/**
587 * Decode SEI
588 */
589int ff_h264_decode_sei(H264Context *h);
590
591/**
592 * Decode SPS
593 */
594int ff_h264_decode_seq_parameter_set(H264Context *h);
595
596/**
fe9a3fbe
JG
597 * compute profile from sps
598 */
599int ff_h264_get_profile(SPS *sps);
600
601/**
1790a5e9
IS
602 * Decode PPS
603 */
604int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length);
605
606/**
49bd8e4b 607 * Decode a network abstraction layer unit.
1790a5e9
IS
608 * @param consumed is the number of bytes used as input
609 * @param length is the length of the array
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DB
610 * @param dst_length is the number of decoded bytes FIXME here
611 * or a decode rbsp tailing?
32e543f8 612 * @return decoded bytes, might be src+1 if no escapes
1790a5e9 613 */
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DB
614const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src,
615 int *dst_length, int *consumed, int length);
1790a5e9
IS
616
617/**
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DB
618 * Free any data that may have been allocated in the H264 context
619 * like SPS, PPS etc.
15861962 620 */
cbf1eae9 621av_cold void ff_h264_free_context(H264Context *h);
15861962 622
75dd6938 623/**
49bd8e4b 624 * Reconstruct bitstream slice_type.
75dd6938 625 */
0dc343d4 626int ff_h264_get_slice_type(const H264Context *h);
75dd6938 627
903d58f6 628/**
49bd8e4b 629 * Allocate tables.
903d58f6
MN
630 * needs width/height
631 */
632int ff_h264_alloc_tables(H264Context *h);
633
634/**
49bd8e4b 635 * Fill the default_ref_list.
ea6f00c4
MN
636 */
637int ff_h264_fill_default_ref_list(H264Context *h);
638
639int ff_h264_decode_ref_pic_list_reordering(H264Context *h);
640void ff_h264_fill_mbaff_ref_list(H264Context *h);
641void ff_h264_remove_all_refs(H264Context *h);
642
643/**
49bd8e4b 644 * Execute the reference picture marking (memory management control operations).
ea6f00c4
MN
645 */
646int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count);
647
bad446e2
RB
648int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb,
649 int first_slice);
ea6f00c4 650
ea382767 651int ff_generate_sliding_window_mmcos(H264Context *h, int first_slice);
733f5990 652
ea6f00c4 653/**
be545b8a
DB
654 * Check if the top & left blocks are available if needed & change the
655 * dc mode so it only uses the available blocks.
903d58f6 656 */
2bedc0e8
MN
657int ff_h264_check_intra4x4_pred_mode(H264Context *h);
658
659/**
be545b8a
DB
660 * Check if the top & left blocks are available if needed & change the
661 * dc mode so it only uses the available blocks.
2bedc0e8 662 */
45b7bd7c 663int ff_h264_check_intra_pred_mode(H264Context *h, int mode, int is_chroma);
903d58f6 664
903d58f6
MN
665void ff_h264_hl_decode_mb(H264Context *h);
666int ff_h264_frame_start(H264Context *h);
05e95319 667int ff_h264_decode_extradata(H264Context *h);
903d58f6 668av_cold int ff_h264_decode_init(AVCodecContext *avctx);
e1e94902
MN
669av_cold void ff_h264_decode_init_vlc(void);
670
671/**
49bd8e4b 672 * Decode a macroblock
be545b8a 673 * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error
e1e94902
MN
674 */
675int ff_h264_decode_mb_cavlc(H264Context *h);
903d58f6 676
cc51b282 677/**
49bd8e4b 678 * Decode a CABAC coded macroblock
be545b8a 679 * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error
cc51b282
MN
680 */
681int ff_h264_decode_mb_cabac(H264Context *h);
682
683void ff_h264_init_cabac_states(H264Context *h);
684
be545b8a
DB
685void ff_h264_direct_dist_scale_factor(H264Context *const h);
686void ff_h264_direct_ref_list_init(H264Context *const h);
687void ff_h264_pred_direct_motion(H264Context *const h, int *mb_type);
943f69a6 688
be545b8a
DB
689void ff_h264_filter_mb_fast(H264Context *h, int mb_x, int mb_y,
690 uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr,
691 unsigned int linesize, unsigned int uvlinesize);
692void ff_h264_filter_mb(H264Context *h, int mb_x, int mb_y,
693 uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr,
694 unsigned int linesize, unsigned int uvlinesize);
082cf971 695
9c095463
MN
696/**
697 * Reset SEI values at the beginning of the frame.
698 *
699 * @param h H.264 context.
700 */
701void ff_h264_reset_sei(H264Context *h);
702
903d58f6 703/*
be545b8a
DB
704 * o-o o-o
705 * / / /
706 * o-o o-o
707 * ,---'
708 * o-o o-o
709 * / / /
710 * o-o o-o
711 */
5657d140
JGG
712
713/* Scan8 organization:
c90b9442
JGG
714 * 0 1 2 3 4 5 6 7
715 * 0 DY y y y y y
716 * 1 y Y Y Y Y
717 * 2 y Y Y Y Y
718 * 3 y Y Y Y Y
719 * 4 y Y Y Y Y
720 * 5 DU u u u u u
721 * 6 u U U U U
722 * 7 u U U U U
723 * 8 u U U U U
724 * 9 u U U U U
725 * 10 DV v v v v v
726 * 11 v V V V V
727 * 12 v V V V V
728 * 13 v V V V V
729 * 14 v V V V V
5657d140
JGG
730 * DY/DU/DV are for luma/chroma DC.
731 */
732
c90b9442
JGG
733#define LUMA_DC_BLOCK_INDEX 48
734#define CHROMA_DC_BLOCK_INDEX 49
735
be545b8a
DB
736// This table must be here because scan8[constant] must be known at compiletime
737static const uint8_t scan8[16 * 3 + 3] = {
738 4 + 1 * 8, 5 + 1 * 8, 4 + 2 * 8, 5 + 2 * 8,
739 6 + 1 * 8, 7 + 1 * 8, 6 + 2 * 8, 7 + 2 * 8,
740 4 + 3 * 8, 5 + 3 * 8, 4 + 4 * 8, 5 + 4 * 8,
741 6 + 3 * 8, 7 + 3 * 8, 6 + 4 * 8, 7 + 4 * 8,
742 4 + 6 * 8, 5 + 6 * 8, 4 + 7 * 8, 5 + 7 * 8,
743 6 + 6 * 8, 7 + 6 * 8, 6 + 7 * 8, 7 + 7 * 8,
744 4 + 8 * 8, 5 + 8 * 8, 4 + 9 * 8, 5 + 9 * 8,
745 6 + 8 * 8, 7 + 8 * 8, 6 + 9 * 8, 7 + 9 * 8,
746 4 + 11 * 8, 5 + 11 * 8, 4 + 12 * 8, 5 + 12 * 8,
747 6 + 11 * 8, 7 + 11 * 8, 6 + 12 * 8, 7 + 12 * 8,
748 4 + 13 * 8, 5 + 13 * 8, 4 + 14 * 8, 5 + 14 * 8,
749 6 + 13 * 8, 7 + 13 * 8, 6 + 14 * 8, 7 + 14 * 8,
750 0 + 0 * 8, 0 + 5 * 8, 0 + 10 * 8
903d58f6
MN
751};
752
be545b8a
DB
753static av_always_inline uint32_t pack16to32(int a, int b)
754{
903d58f6 755#if HAVE_BIGENDIAN
be545b8a 756 return (b & 0xFFFF) + (a << 16);
903d58f6 757#else
be545b8a 758 return (a & 0xFFFF) + (b << 16);
903d58f6
MN
759#endif
760}
761
be545b8a
DB
762static av_always_inline uint16_t pack8to16(int a, int b)
763{
b5bd0700 764#if HAVE_BIGENDIAN
be545b8a 765 return (b & 0xFF) + (a << 8);
b5bd0700 766#else
be545b8a 767 return (a & 0xFF) + (b << 8);
b5bd0700
MN
768#endif
769}
770
903d58f6 771/**
58c42af7 772 * Get the chroma qp.
082cf971 773 */
be545b8a
DB
774static av_always_inline int get_chroma_qp(H264Context *h, int t, int qscale)
775{
082cf971
MN
776 return h->pps.chroma_qp_table[t][qscale];
777}
778
44a5e7b6 779/**
58c42af7 780 * Get the predicted intra4x4 prediction mode.
e1e94902 781 */
be545b8a
DB
782static av_always_inline int pred_intra_mode(H264Context *h, int n)
783{
784 const int index8 = scan8[n];
785 const int left = h->intra4x4_pred_mode_cache[index8 - 1];
786 const int top = h->intra4x4_pred_mode_cache[index8 - 8];
787 const int min = FFMIN(left, top);
e1e94902 788
be545b8a 789 tprintf(h->s.avctx, "mode:%d %d min:%d\n", left, top, min);
e1e94902 790
be545b8a
DB
791 if (min < 0)
792 return DC_PRED;
793 else
794 return min;
e1e94902
MN
795}
796
be545b8a
DB
797static av_always_inline void write_back_intra_pred_mode(H264Context *h)
798{
799 int8_t *i4x4 = h->intra4x4_pred_mode + h->mb2br_xy[h->mb_xy];
800 int8_t *i4x4_cache = h->intra4x4_pred_mode_cache;
3b7ebeb4 801
be545b8a
DB
802 AV_COPY32(i4x4, i4x4_cache + 4 + 8 * 4);
803 i4x4[4] = i4x4_cache[7 + 8 * 3];
804 i4x4[5] = i4x4_cache[7 + 8 * 2];
805 i4x4[6] = i4x4_cache[7 + 8 * 1];
3b7ebeb4 806}
e1e94902 807
be545b8a
DB
808static av_always_inline void write_back_non_zero_count(H264Context *h)
809{
810 const int mb_xy = h->mb_xy;
811 uint8_t *nnz = h->non_zero_count[mb_xy];
3b7ebeb4
JGG
812 uint8_t *nnz_cache = h->non_zero_count_cache;
813
be545b8a
DB
814 AV_COPY32(&nnz[ 0], &nnz_cache[4 + 8 * 1]);
815 AV_COPY32(&nnz[ 4], &nnz_cache[4 + 8 * 2]);
816 AV_COPY32(&nnz[ 8], &nnz_cache[4 + 8 * 3]);
817 AV_COPY32(&nnz[12], &nnz_cache[4 + 8 * 4]);
818 AV_COPY32(&nnz[16], &nnz_cache[4 + 8 * 6]);
819 AV_COPY32(&nnz[20], &nnz_cache[4 + 8 * 7]);
820 AV_COPY32(&nnz[32], &nnz_cache[4 + 8 * 11]);
821 AV_COPY32(&nnz[36], &nnz_cache[4 + 8 * 12]);
822
823 if (!h->s.chroma_y_shift) {
824 AV_COPY32(&nnz[24], &nnz_cache[4 + 8 * 8]);
825 AV_COPY32(&nnz[28], &nnz_cache[4 + 8 * 9]);
826 AV_COPY32(&nnz[40], &nnz_cache[4 + 8 * 13]);
827 AV_COPY32(&nnz[44], &nnz_cache[4 + 8 * 14]);
3b7ebeb4
JGG
828 }
829}
830
be545b8a
DB
831static av_always_inline void write_back_motion_list(H264Context *h,
832 MpegEncContext *const s,
833 int b_stride,
834 int b_xy, int b8_xy,
835 int mb_type, int list)
3b7ebeb4 836{
be545b8a
DB
837 int16_t(*mv_dst)[2] = &s->current_picture.f.motion_val[list][b_xy];
838 int16_t(*mv_src)[2] = &h->mv_cache[list][scan8[0]];
839 AV_COPY128(mv_dst + 0 * b_stride, mv_src + 8 * 0);
840 AV_COPY128(mv_dst + 1 * b_stride, mv_src + 8 * 1);
841 AV_COPY128(mv_dst + 2 * b_stride, mv_src + 8 * 2);
842 AV_COPY128(mv_dst + 3 * b_stride, mv_src + 8 * 3);
843 if (CABAC) {
844 uint8_t (*mvd_dst)[2] = &h->mvd_table[list][FMO ? 8 * h->mb_xy
845 : h->mb2br_xy[h->mb_xy]];
846 uint8_t(*mvd_src)[2] = &h->mvd_cache[list][scan8[0]];
847 if (IS_SKIP(mb_type)) {
3b7ebeb4 848 AV_ZERO128(mvd_dst);
be545b8a
DB
849 } else {
850 AV_COPY64(mvd_dst, mvd_src + 8 * 3);
851 AV_COPY16(mvd_dst + 3 + 3, mvd_src + 3 + 8 * 0);
852 AV_COPY16(mvd_dst + 3 + 2, mvd_src + 3 + 8 * 1);
853 AV_COPY16(mvd_dst + 3 + 1, mvd_src + 3 + 8 * 2);
3b7ebeb4
JGG
854 }
855 }
856
857 {
657ccb5a 858 int8_t *ref_index = &s->current_picture.f.ref_index[list][b8_xy];
3b7ebeb4 859 int8_t *ref_cache = h->ref_cache[list];
be545b8a
DB
860 ref_index[0 + 0 * 2] = ref_cache[scan8[0]];
861 ref_index[1 + 0 * 2] = ref_cache[scan8[4]];
862 ref_index[0 + 1 * 2] = ref_cache[scan8[8]];
863 ref_index[1 + 1 * 2] = ref_cache[scan8[12]];
c90b9442 864 }
e1e94902
MN
865}
866
be545b8a
DB
867static av_always_inline void write_back_motion(H264Context *h, int mb_type)
868{
869 MpegEncContext *const s = &h->s;
870 const int b_stride = h->b_stride;
871 const int b_xy = 4 * s->mb_x + 4 * s->mb_y * h->b_stride; // try mb2b(8)_xy
872 const int b8_xy = 4 * h->mb_xy;
e1e94902 873
be545b8a 874 if (USES_LIST(mb_type, 0)) {
3b7ebeb4 875 write_back_motion_list(h, s, b_stride, b_xy, b8_xy, mb_type, 0);
be545b8a 876 } else {
657ccb5a
DB
877 fill_rectangle(&s->current_picture.f.ref_index[0][b8_xy],
878 2, 2, 2, (uint8_t)LIST_NOT_USED, 1);
3b7ebeb4 879 }
be545b8a 880 if (USES_LIST(mb_type, 1))
3b7ebeb4 881 write_back_motion_list(h, s, b_stride, b_xy, b8_xy, mb_type, 1);
e1e94902 882
be545b8a
DB
883 if (h->slice_type_nos == AV_PICTURE_TYPE_B && CABAC) {
884 if (IS_8X8(mb_type)) {
885 uint8_t *direct_table = &h->direct_table[4 * h->mb_xy];
886 direct_table[1] = h->sub_mb_type[1] >> 1;
887 direct_table[2] = h->sub_mb_type[2] >> 1;
888 direct_table[3] = h->sub_mb_type[3] >> 1;
e1e94902
MN
889 }
890 }
891}
892
be545b8a
DB
893static av_always_inline int get_dct8x8_allowed(H264Context *h)
894{
895 if (h->sps.direct_8x8_inference_flag)
896 return !(AV_RN64A(h->sub_mb_type) &
897 ((MB_TYPE_16x8 | MB_TYPE_8x16 | MB_TYPE_8x8) *
898 0x0001000100010001ULL));
e1e94902 899 else
be545b8a
DB
900 return !(AV_RN64A(h->sub_mb_type) &
901 ((MB_TYPE_16x8 | MB_TYPE_8x16 | MB_TYPE_8x8 | MB_TYPE_DIRECT2) *
902 0x0001000100010001ULL));
e1e94902
MN
903}
904
98790382 905#endif /* AVCODEC_H264_H */