Reindent after last commit.
[libav.git] / libavcodec / h264.h
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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 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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 *
12 * FFmpeg is distributed in the hope that it will be useful,
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
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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20 */
21
22/**
bad5537e 23 * @file libavcodec/h264.h
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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
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30
31#include "dsputil.h"
32#include "cabac.h"
33#include "mpegvideo.h"
c92a30bb 34#include "h264pred.h"
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35
36#define interlaced_dct interlaced_dct_is_a_bad_name
90b5b51e 37#define mb_intra mb_intra_is_not_initialized_see_mb_type
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38
39#define LUMA_DC_BLOCK_INDEX 25
40#define CHROMA_DC_BLOCK_INDEX 26
41
42#define CHROMA_DC_COEFF_TOKEN_VLC_BITS 8
43#define COEFF_TOKEN_VLC_BITS 8
44#define TOTAL_ZEROS_VLC_BITS 9
45#define CHROMA_DC_TOTAL_ZEROS_VLC_BITS 3
46#define RUN_VLC_BITS 3
47#define RUN7_VLC_BITS 6
48
49#define MAX_SPS_COUNT 32
50#define MAX_PPS_COUNT 256
51
52#define MAX_MMCO_COUNT 66
53
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54#define MAX_DELAYED_PIC_COUNT 16
55
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56/* Compiling in interlaced support reduces the speed
57 * of progressive decoding by about 2%. */
58#define ALLOW_INTERLACE
59
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60#define ALLOW_NOCHROMA
61
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62/**
63 * The maximum number of slices supported by the decoder.
64 * must be a power of 2
65 */
66#define MAX_SLICES 16
67
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68#ifdef ALLOW_INTERLACE
69#define MB_MBAFF h->mb_mbaff
70#define MB_FIELD h->mb_field_decoding_flag
71#define FRAME_MBAFF h->mb_aff_frame
d6c52130 72#define FIELD_PICTURE (s->picture_structure != PICT_FRAME)
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73#else
74#define MB_MBAFF 0
75#define MB_FIELD 0
76#define FRAME_MBAFF 0
bbb3edb8 77#define FIELD_PICTURE 0
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78#undef IS_INTERLACED
79#define IS_INTERLACED(mb_type) 0
80#endif
f3e53d9f 81#define FIELD_OR_MBAFF_PICTURE (FRAME_MBAFF || FIELD_PICTURE)
26b4fe82 82
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83#ifdef ALLOW_NOCHROMA
84#define CHROMA h->sps.chroma_format_idc
85#else
86#define CHROMA 1
87#endif
88
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89#define EXTENDED_SAR 255
90
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91#define MB_TYPE_REF0 MB_TYPE_ACPRED //dirty but it fits in 16 bit
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
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96/* NAL unit types */
97enum {
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98 NAL_SLICE=1,
99 NAL_DPA,
100 NAL_DPB,
101 NAL_DPC,
102 NAL_IDR_SLICE,
103 NAL_SEI,
104 NAL_SPS,
105 NAL_PPS,
106 NAL_AUD,
107 NAL_END_SEQUENCE,
108 NAL_END_STREAM,
109 NAL_FILLER_DATA,
110 NAL_SPS_EXT,
111 NAL_AUXILIARY_SLICE=19
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112};
113
26b4fe82 114/**
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115 * SEI message types
116 */
117typedef enum {
2ea89d92 118 SEI_BUFFERING_PERIOD = 0, ///< buffering period (H.264, D.1.1)
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119 SEI_TYPE_PIC_TIMING = 1, ///< picture timing
120 SEI_TYPE_USER_DATA_UNREGISTERED = 5, ///< unregistered user data
121 SEI_TYPE_RECOVERY_POINT = 6 ///< recovery point (frame # to decoder sync)
122} SEI_Type;
123
124/**
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125 * pic_struct in picture timing SEI message
126 */
127typedef enum {
128 SEI_PIC_STRUCT_FRAME = 0, ///< 0: %frame
129 SEI_PIC_STRUCT_TOP_FIELD = 1, ///< 1: top field
130 SEI_PIC_STRUCT_BOTTOM_FIELD = 2, ///< 2: bottom field
131 SEI_PIC_STRUCT_TOP_BOTTOM = 3, ///< 3: top field, bottom field, in that order
132 SEI_PIC_STRUCT_BOTTOM_TOP = 4, ///< 4: bottom field, top field, in that order
133 SEI_PIC_STRUCT_TOP_BOTTOM_TOP = 5, ///< 5: top field, bottom field, top field repeated, in that order
134 SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM = 6, ///< 6: bottom field, top field, bottom field repeated, in that order
135 SEI_PIC_STRUCT_FRAME_DOUBLING = 7, ///< 7: %frame doubling
136 SEI_PIC_STRUCT_FRAME_TRIPLING = 8 ///< 8: %frame tripling
137} SEI_PicStructType;
138
139/**
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140 * Sequence parameter set
141 */
142typedef struct SPS{
143
144 int profile_idc;
145 int level_idc;
0af6967e 146 int chroma_format_idc;
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147 int transform_bypass; ///< qpprime_y_zero_transform_bypass_flag
148 int log2_max_frame_num; ///< log2_max_frame_num_minus4 + 4
149 int poc_type; ///< pic_order_cnt_type
150 int log2_max_poc_lsb; ///< log2_max_pic_order_cnt_lsb_minus4
151 int delta_pic_order_always_zero_flag;
152 int offset_for_non_ref_pic;
153 int offset_for_top_to_bottom_field;
154 int poc_cycle_length; ///< num_ref_frames_in_pic_order_cnt_cycle
155 int ref_frame_count; ///< num_ref_frames
156 int gaps_in_frame_num_allowed_flag;
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157 int mb_width; ///< pic_width_in_mbs_minus1 + 1
158 int mb_height; ///< pic_height_in_map_units_minus1 + 1
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159 int frame_mbs_only_flag;
160 int mb_aff; ///<mb_adaptive_frame_field_flag
161 int direct_8x8_inference_flag;
162 int crop; ///< frame_cropping_flag
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163 unsigned int crop_left; ///< frame_cropping_rect_left_offset
164 unsigned int crop_right; ///< frame_cropping_rect_right_offset
165 unsigned int crop_top; ///< frame_cropping_rect_top_offset
166 unsigned int crop_bottom; ///< frame_cropping_rect_bottom_offset
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167 int vui_parameters_present_flag;
168 AVRational sar;
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169 int video_signal_type_present_flag;
170 int full_range;
171 int colour_description_present_flag;
172 enum AVColorPrimaries color_primaries;
173 enum AVColorTransferCharacteristic color_trc;
174 enum AVColorSpace colorspace;
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175 int timing_info_present_flag;
176 uint32_t num_units_in_tick;
177 uint32_t time_scale;
178 int fixed_frame_rate_flag;
179 short offset_for_ref_frame[256]; //FIXME dyn aloc?
180 int bitstream_restriction_flag;
181 int num_reorder_frames;
182 int scaling_matrix_present;
183 uint8_t scaling_matrix4[6][16];
184 uint8_t scaling_matrix8[2][64];
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185 int nal_hrd_parameters_present_flag;
186 int vcl_hrd_parameters_present_flag;
187 int pic_struct_present_flag;
188 int time_offset_length;
24a414e0 189 int cpb_cnt; ///< See H.264 E.1.2
82e38c29 190 int initial_cpb_removal_delay_length; ///< initial_cpb_removal_delay_length_minus1 +1
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191 int cpb_removal_delay_length; ///< cpb_removal_delay_length_minus1 + 1
192 int dpb_output_delay_length; ///< dpb_output_delay_length_minus1 + 1
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193 int bit_depth_luma; ///< bit_depth_luma_minus8 + 8
194 int bit_depth_chroma; ///< bit_depth_chroma_minus8 + 8
195 int residual_color_transform_flag; ///< residual_colour_transform_flag
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196}SPS;
197
198/**
199 * Picture parameter set
200 */
201typedef struct PPS{
202 unsigned int sps_id;
203 int cabac; ///< entropy_coding_mode_flag
204 int pic_order_present; ///< pic_order_present_flag
205 int slice_group_count; ///< num_slice_groups_minus1 + 1
206 int mb_slice_group_map_type;
207 unsigned int ref_count[2]; ///< num_ref_idx_l0/1_active_minus1 + 1
208 int weighted_pred; ///< weighted_pred_flag
209 int weighted_bipred_idc;
210 int init_qp; ///< pic_init_qp_minus26 + 26
211 int init_qs; ///< pic_init_qs_minus26 + 26
4691a77d 212 int chroma_qp_index_offset[2];
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213 int deblocking_filter_parameters_present; ///< deblocking_filter_parameters_present_flag
214 int constrained_intra_pred; ///< constrained_intra_pred_flag
215 int redundant_pic_cnt_present; ///< redundant_pic_cnt_present_flag
216 int transform_8x8_mode; ///< transform_8x8_mode_flag
217 uint8_t scaling_matrix4[6][16];
218 uint8_t scaling_matrix8[2][64];
5a78bfbd 219 uint8_t chroma_qp_table[2][64]; ///< pre-scaled (with chroma_qp_index_offset) version of qp_table
4691a77d 220 int chroma_qp_diff;
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221}PPS;
222
223/**
224 * Memory management control operation opcode.
225 */
226typedef enum MMCOOpcode{
227 MMCO_END=0,
228 MMCO_SHORT2UNUSED,
229 MMCO_LONG2UNUSED,
230 MMCO_SHORT2LONG,
231 MMCO_SET_MAX_LONG,
232 MMCO_RESET,
233 MMCO_LONG,
234} MMCOOpcode;
235
236/**
237 * Memory management control operation.
238 */
239typedef struct MMCO{
240 MMCOOpcode opcode;
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241 int short_pic_num; ///< pic_num without wrapping (pic_num & max_pic_num)
242 int long_arg; ///< index, pic_num, or num long refs depending on opcode
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243} MMCO;
244
245/**
246 * H264Context
247 */
248typedef struct H264Context{
249 MpegEncContext s;
250 int nal_ref_idc;
251 int nal_unit_type;
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252 uint8_t *rbsp_buffer[2];
253 unsigned int rbsp_buffer_size[2];
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254
255 /**
256 * Used to parse AVC variant of h264
257 */
258 int is_avc; ///< this flag is != 0 if codec is avc1
259 int got_avcC; ///< flag used to parse avcC data only once
260 int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)
261
4691a77d 262 int chroma_qp[2]; //QPc
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263
264 int prev_mb_skipped;
265 int next_mb_skipped;
266
267 //prediction stuff
268 int chroma_pred_mode;
269 int intra16x16_pred_mode;
270
271 int top_mb_xy;
272 int left_mb_xy[2];
273
274 int8_t intra4x4_pred_mode_cache[5*8];
275 int8_t (*intra4x4_pred_mode)[8];
c92a30bb 276 H264PredContext hpc;
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277 unsigned int topleft_samples_available;
278 unsigned int top_samples_available;
279 unsigned int topright_samples_available;
280 unsigned int left_samples_available;
281 uint8_t (*top_borders[2])[16+2*8];
282 uint8_t left_border[2*(17+2*9)];
283
284 /**
285 * non zero coeff count cache.
286 * is 64 if not available.
287 */
288 DECLARE_ALIGNED_8(uint8_t, non_zero_count_cache[6*8]);
289 uint8_t (*non_zero_count)[16];
290
291 /**
292 * Motion vector cache.
293 */
294 DECLARE_ALIGNED_8(int16_t, mv_cache[2][5*8][2]);
295 DECLARE_ALIGNED_8(int8_t, ref_cache[2][5*8]);
296#define LIST_NOT_USED -1 //FIXME rename?
297#define PART_NOT_AVAILABLE -2
298
299 /**
300 * is 1 if the specific list MV&references are set to 0,0,-2.
301 */
302 int mv_cache_clean[2];
303
304 /**
305 * number of neighbors (top and/or left) that used 8x8 dct
306 */
307 int neighbor_transform_size;
308
309 /**
310 * block_offset[ 0..23] for frame macroblocks
311 * block_offset[24..47] for field macroblocks
312 */
313 int block_offset[2*(16+8)];
314
315 uint32_t *mb2b_xy; //FIXME are these 4 a good idea?
316 uint32_t *mb2b8_xy;
317 int b_stride; //FIXME use s->b4_stride
318 int b8_stride;
319
320 int mb_linesize; ///< may be equal to s->linesize or s->linesize*2, for mbaff
321 int mb_uvlinesize;
322
323 int emu_edge_width;
324 int emu_edge_height;
325
326 int halfpel_flag;
327 int thirdpel_flag;
328
329 int unknown_svq3_flag;
330 int next_slice_index;
331
7978debd 332 SPS *sps_buffers[MAX_SPS_COUNT];
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333 SPS sps; ///< current sps
334
7978debd 335 PPS *pps_buffers[MAX_PPS_COUNT];
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336 /**
337 * current pps
338 */
339 PPS pps; //FIXME move to Picture perhaps? (->no) do we need that?
340
341 uint32_t dequant4_buffer[6][52][16];
342 uint32_t dequant8_buffer[2][52][64];
343 uint32_t (*dequant4_coeff[6])[16];
344 uint32_t (*dequant8_coeff[2])[64];
345 int dequant_coeff_pps; ///< reinit tables when pps changes
346
347 int slice_num;
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348 uint16_t *slice_table_base;
349 uint16_t *slice_table; ///< slice_table_base + 2*mb_stride + 1
26b4fe82 350 int slice_type;
e3e6f18f 351 int slice_type_nos; ///< S free slice type (SI/SP are remapped to I/P)
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352 int slice_type_fixed;
353
354 //interlacing specific flags
355 int mb_aff_frame;
356 int mb_field_decoding_flag;
357 int mb_mbaff; ///< mb_aff_frame && mb_field_decoding_flag
358
da2911d5 359 DECLARE_ALIGNED_8(uint16_t, sub_mb_type[4]);
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360
361 //POC stuff
362 int poc_lsb;
363 int poc_msb;
364 int delta_poc_bottom;
365 int delta_poc[2];
366 int frame_num;
367 int prev_poc_msb; ///< poc_msb of the last reference pic for POC type 0
368 int prev_poc_lsb; ///< poc_lsb of the last reference pic for POC type 0
369 int frame_num_offset; ///< for POC type 2
370 int prev_frame_num_offset; ///< for POC type 2
371 int prev_frame_num; ///< frame_num of the last pic for POC type 1/2
372
373 /**
f57e2af6 374 * frame_num for frames or 2*frame_num+1 for field pics.
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375 */
376 int curr_pic_num;
377
378 /**
379 * max_frame_num or 2*max_frame_num for field pics.
380 */
381 int max_pic_num;
382
383 //Weighted pred stuff
384 int use_weight;
385 int use_weight_chroma;
386 int luma_log2_weight_denom;
387 int chroma_log2_weight_denom;
388 int luma_weight[2][48];
389 int luma_offset[2][48];
390 int chroma_weight[2][48][2];
391 int chroma_offset[2][48][2];
392 int implicit_weight[48][48];
393
394 //deblock
395 int deblocking_filter; ///< disable_deblocking_filter_idc with 1<->0
396 int slice_alpha_c0_offset;
397 int slice_beta_offset;
398
399 int redundant_pic_count;
400
401 int direct_spatial_mv_pred;
402 int dist_scale_factor[16];
8b1fd554 403 int dist_scale_factor_field[2][32];
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404 int map_col_to_list0[2][16+32];
405 int map_col_to_list0_field[2][2][16+32];
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406
407 /**
408 * num_ref_idx_l0/1_active_minus1 + 1
409 */
410 unsigned int ref_count[2]; ///< counts frames or fields, depending on current mb mode
411 unsigned int list_count;
412 Picture *short_ref[32];
413 Picture *long_ref[32];
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414 Picture default_ref_list[2][32]; ///< base reference list for all slices of a coded picture
415 Picture ref_list[2][48]; /**< 0..15: frame refs, 16..47: mbaff field refs.
416 Reordered version of default_ref_list
417 according to picture reordering in slice header */
b735aeea 418 int ref2frm[MAX_SLICES][2][64]; ///< reference to frame number lists, used in the loop filter, the first 2 are for -2,-1
64b9d48f 419 Picture *delayed_pic[MAX_DELAYED_PIC_COUNT+2]; //FIXME size?
df8a7dff 420 int outputed_poc;
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421
422 /**
423 * memory management control operations buffer.
424 */
425 MMCO mmco[MAX_MMCO_COUNT];
426 int mmco_index;
427
428 int long_ref_count; ///< number of actual long term references
429 int short_ref_count; ///< number of actual short term references
430
431 //data partitioning
432 GetBitContext intra_gb;
433 GetBitContext inter_gb;
434 GetBitContext *intra_gb_ptr;
435 GetBitContext *inter_gb_ptr;
436
ed5d7a53 437 DECLARE_ALIGNED_16(DCTELEM, mb[16*24]);
2cab6401 438 DCTELEM mb_padding[256]; ///< 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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439
440 /**
441 * Cabac
442 */
443 CABACContext cabac;
444 uint8_t cabac_state[460];
445 int cabac_init_idc;
446
447 /* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0,1,2), 0x0? luma_cbp */
448 uint16_t *cbp_table;
449 int cbp;
450 int top_cbp;
451 int left_cbp;
452 /* chroma_pred_mode for i4x4 or i16x16, else 0 */
453 uint8_t *chroma_pred_mode_table;
454 int last_qscale_diff;
455 int16_t (*mvd_table[2])[2];
456 DECLARE_ALIGNED_8(int16_t, mvd_cache[2][5*8][2]);
457 uint8_t *direct_table;
458 uint8_t direct_cache[5*8];
459
460 uint8_t zigzag_scan[16];
461 uint8_t zigzag_scan8x8[64];
462 uint8_t zigzag_scan8x8_cavlc[64];
463 uint8_t field_scan[16];
464 uint8_t field_scan8x8[64];
465 uint8_t field_scan8x8_cavlc[64];
466 const uint8_t *zigzag_scan_q0;
467 const uint8_t *zigzag_scan8x8_q0;
468 const uint8_t *zigzag_scan8x8_cavlc_q0;
469 const uint8_t *field_scan_q0;
470 const uint8_t *field_scan8x8_q0;
471 const uint8_t *field_scan8x8_cavlc_q0;
472
473 int x264_build;
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474
475 /**
476 * @defgroup multithreading Members for slice based multithreading
477 * @{
478 */
479 struct H264Context *thread_context[MAX_THREADS];
480
481 /**
482 * current slice number, used to initalize slice_num of each thread/context
483 */
484 int current_slice;
485
486 /**
487 * Max number of threads / contexts.
488 * This is equal to AVCodecContext.thread_count unless
489 * multithreaded decoding is impossible, in which case it is
490 * reduced to 1.
491 */
492 int max_contexts;
493
494 /**
495 * 1 if the single thread fallback warning has already been
496 * displayed, 0 otherwise.
497 */
498 int single_decode_warning;
499
500 int last_slice_type;
501 /** @} */
502
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503 int mb_xy;
504
1fdcdf8d 505 uint32_t svq3_watermark_key;
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506
507 /**
508 * pic_struct in picture timing SEI message
509 */
510 SEI_PicStructType sei_pic_struct;
89db0bae 511
37a558fe 512 /**
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513 * Complement sei_pic_struct
514 * SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced frames.
515 * However, soft telecined frames may have these values.
516 * This is used in an attempt to flag soft telecine progressive.
517 */
518 int prev_interlaced_frame;
519
520 /**
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521 * Bit set of clock types for fields/frames in picture timing SEI message.
522 * For each found ct_type, appropriate bit is set (e.g., bit 1 for
523 * interlaced).
524 */
525 int sei_ct_type;
526
527 /**
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528 * dpb_output_delay in picture timing SEI message, see H.264 C.2.2
529 */
530 int sei_dpb_output_delay;
531
532 /**
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533 * cpb_removal_delay in picture timing SEI message, see H.264 C.1.2
534 */
535 int sei_cpb_removal_delay;
536
537 /**
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538 * recovery_frame_cnt from SEI message
539 *
540 * Set to -1 if no recovery point SEI message found or to number of frames
541 * before playback synchronizes. Frames having recovery point are key
542 * frames.
543 */
544 int sei_recovery_frame_cnt;
545
89db0bae 546 int is_complex;
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547
548 int luma_weight_flag[2]; ///< 7.4.3.2 luma_weight_lX_flag
549 int chroma_weight_flag[2]; ///< 7.4.3.2 chroma_weight_lX_flag
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550
551 // Timestamp stuff
552 int sei_buffering_period_present; ///< Buffering period SEI flag
553 int initial_cpb_removal_delay[32]; ///< Initial timestamps for CPBs
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554}H264Context;
555
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556
557extern const uint8_t ff_h264_chroma_qp[52];
558
559
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560/**
561 * Decode SEI
562 */
563int ff_h264_decode_sei(H264Context *h);
564
565/**
566 * Decode SPS
567 */
568int ff_h264_decode_seq_parameter_set(H264Context *h);
569
570/**
571 * Decode PPS
572 */
573int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length);
574
575/**
576 * Decodes a network abstraction layer unit.
577 * @param consumed is the number of bytes used as input
578 * @param length is the length of the array
579 * @param dst_length is the number of decoded bytes FIXME here or a decode rbsp tailing?
580 * @returns decoded bytes, might be src+1 if no escapes
581 */
582const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length);
583
584/**
585 * identifies the exact end of the bitstream
586 * @return the length of the trailing, or 0 if damaged
587 */
588int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src);
589
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590/**
591 * frees any data that may have been allocated in the H264 context like SPS, PPS etc.
592 */
cbf1eae9 593av_cold void ff_h264_free_context(H264Context *h);
15861962 594
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595/**
596 * reconstructs bitstream slice_type.
597 */
598int ff_h264_get_slice_type(H264Context *h);
599
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600/**
601 * allocates tables.
602 * needs width/height
603 */
604int ff_h264_alloc_tables(H264Context *h);
605
606/**
607 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
608 */
609int ff_h264_check_intra_pred_mode(H264Context *h, int mode);
610
611void ff_h264_write_back_intra_pred_mode(H264Context *h);
612void ff_h264_hl_decode_mb(H264Context *h);
613int ff_h264_frame_start(H264Context *h);
614av_cold int ff_h264_decode_init(AVCodecContext *avctx);
615av_cold int ff_h264_decode_end(AVCodecContext *avctx);
616
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617void ff_h264_direct_dist_scale_factor(H264Context * const h);
618void ff_h264_direct_ref_list_init(H264Context * const h);
619void ff_h264_pred_direct_motion(H264Context * const h, int *mb_type);
620
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621void ff_h264_filter_mb_fast( H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize);
622void ff_h264_filter_mb( H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize);
623
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624/**
625 * Reset SEI values at the beginning of the frame.
626 *
627 * @param h H.264 context.
628 */
629void ff_h264_reset_sei(H264Context *h);
630
631
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632/*
633o-o o-o
634 / / /
635o-o o-o
636 ,---'
637o-o o-o
638 / / /
639o-o o-o
640*/
641//This table must be here because scan8[constant] must be known at compiletime
642static const uint8_t scan8[16 + 2*4]={
643 4+1*8, 5+1*8, 4+2*8, 5+2*8,
644 6+1*8, 7+1*8, 6+2*8, 7+2*8,
645 4+3*8, 5+3*8, 4+4*8, 5+4*8,
646 6+3*8, 7+3*8, 6+4*8, 7+4*8,
647 1+1*8, 2+1*8,
648 1+2*8, 2+2*8,
649 1+4*8, 2+4*8,
650 1+5*8, 2+5*8,
651};
652
653static av_always_inline uint32_t pack16to32(int a, int b){
654#if HAVE_BIGENDIAN
655 return (b&0xFFFF) + (a<<16);
656#else
657 return (a&0xFFFF) + (b<<16);
658#endif
659}
660
661/**
662 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
663 */
664static inline int check_intra4x4_pred_mode(H264Context *h){
665 MpegEncContext * const s = &h->s;
666 static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
667 static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
668 int i;
669
670 if(!(h->top_samples_available&0x8000)){
671 for(i=0; i<4; i++){
672 int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
673 if(status<0){
674 av_log(h->s.avctx, AV_LOG_ERROR, "top block unavailable for requested intra4x4 mode %d at %d %d\n", status, s->mb_x, s->mb_y);
675 return -1;
676 } else if(status){
677 h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
678 }
679 }
680 }
681
682 if((h->left_samples_available&0x8888)!=0x8888){
683 static const int mask[4]={0x8000,0x2000,0x80,0x20};
684 for(i=0; i<4; i++){
685 if(!(h->left_samples_available&mask[i])){
686 int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
687 if(status<0){
688 av_log(h->s.avctx, AV_LOG_ERROR, "left block unavailable for requested intra4x4 mode %d at %d %d\n", status, s->mb_x, s->mb_y);
689 return -1;
690 } else if(status){
691 h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
692 }
693 }
694 }
695 }
696
697 return 0;
698} //FIXME cleanup like ff_h264_check_intra_pred_mode
699
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700/**
701 * gets the chroma qp.
702 */
703static inline int get_chroma_qp(H264Context *h, int t, int qscale){
704 return h->pps.chroma_qp_table[t][qscale];
705}
706
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707static inline int fetch_diagonal_mv(H264Context *h, const int16_t **C, int i, int list, int part_width){
708 const int topright_ref= h->ref_cache[list][ i - 8 + part_width ];
709 MpegEncContext *s = &h->s;
710
711 /* there is no consistent mapping of mvs to neighboring locations that will
712 * make mbaff happy, so we can't move all this logic to fill_caches */
713 if(FRAME_MBAFF){
714 const uint32_t *mb_types = s->current_picture_ptr->mb_type;
715 const int16_t *mv;
716 *(uint32_t*)h->mv_cache[list][scan8[0]-2] = 0;
717 *C = h->mv_cache[list][scan8[0]-2];
718
719 if(!MB_FIELD
720 && (s->mb_y&1) && i < scan8[0]+8 && topright_ref != PART_NOT_AVAILABLE){
721 int topright_xy = s->mb_x + (s->mb_y-1)*s->mb_stride + (i == scan8[0]+3);
722 if(IS_INTERLACED(mb_types[topright_xy])){
723#define SET_DIAG_MV(MV_OP, REF_OP, X4, Y4)\
724 const int x4 = X4, y4 = Y4;\
725 const int mb_type = mb_types[(x4>>2)+(y4>>2)*s->mb_stride];\
726 if(!USES_LIST(mb_type,list))\
727 return LIST_NOT_USED;\
728 mv = s->current_picture_ptr->motion_val[list][x4 + y4*h->b_stride];\
729 h->mv_cache[list][scan8[0]-2][0] = mv[0];\
730 h->mv_cache[list][scan8[0]-2][1] = mv[1] MV_OP;\
731 return s->current_picture_ptr->ref_index[list][(x4>>1) + (y4>>1)*h->b8_stride] REF_OP;
732
733 SET_DIAG_MV(*2, >>1, s->mb_x*4+(i&7)-4+part_width, s->mb_y*4-1);
734 }
735 }
736 if(topright_ref == PART_NOT_AVAILABLE
737 && ((s->mb_y&1) || i >= scan8[0]+8) && (i&7)==4
738 && h->ref_cache[list][scan8[0]-1] != PART_NOT_AVAILABLE){
739 if(!MB_FIELD
740 && IS_INTERLACED(mb_types[h->left_mb_xy[0]])){
741 SET_DIAG_MV(*2, >>1, s->mb_x*4-1, (s->mb_y|1)*4+(s->mb_y&1)*2+(i>>4)-1);
742 }
743 if(MB_FIELD
744 && !IS_INTERLACED(mb_types[h->left_mb_xy[0]])
745 && i >= scan8[0]+8){
746 // left shift will turn LIST_NOT_USED into PART_NOT_AVAILABLE, but that's OK.
747 SET_DIAG_MV(/2, <<1, s->mb_x*4-1, (s->mb_y&~1)*4 - 1 + ((i-scan8[0])>>3)*2);
748 }
749 }
750#undef SET_DIAG_MV
751 }
752
753 if(topright_ref != PART_NOT_AVAILABLE){
754 *C= h->mv_cache[list][ i - 8 + part_width ];
755 return topright_ref;
756 }else{
757 tprintf(s->avctx, "topright MV not available\n");
758
759 *C= h->mv_cache[list][ i - 8 - 1 ];
760 return h->ref_cache[list][ i - 8 - 1 ];
761 }
762}
763
764/**
765 * gets the predicted MV.
766 * @param n the block index
767 * @param part_width the width of the partition (4, 8,16) -> (1, 2, 4)
768 * @param mx the x component of the predicted motion vector
769 * @param my the y component of the predicted motion vector
770 */
771static inline void pred_motion(H264Context * const h, int n, int part_width, int list, int ref, int * const mx, int * const my){
772 const int index8= scan8[n];
773 const int top_ref= h->ref_cache[list][ index8 - 8 ];
774 const int left_ref= h->ref_cache[list][ index8 - 1 ];
775 const int16_t * const A= h->mv_cache[list][ index8 - 1 ];
776 const int16_t * const B= h->mv_cache[list][ index8 - 8 ];
777 const int16_t * C;
778 int diagonal_ref, match_count;
779
780 assert(part_width==1 || part_width==2 || part_width==4);
781
782/* mv_cache
783 B . . A T T T T
784 U . . L . . , .
785 U . . L . . . .
786 U . . L . . , .
787 . . . L . . . .
788*/
789
790 diagonal_ref= fetch_diagonal_mv(h, &C, index8, list, part_width);
791 match_count= (diagonal_ref==ref) + (top_ref==ref) + (left_ref==ref);
792 tprintf(h->s.avctx, "pred_motion match_count=%d\n", match_count);
793 if(match_count > 1){ //most common
794 *mx= mid_pred(A[0], B[0], C[0]);
795 *my= mid_pred(A[1], B[1], C[1]);
796 }else if(match_count==1){
797 if(left_ref==ref){
798 *mx= A[0];
799 *my= A[1];
800 }else if(top_ref==ref){
801 *mx= B[0];
802 *my= B[1];
803 }else{
804 *mx= C[0];
805 *my= C[1];
806 }
807 }else{
808 if(top_ref == PART_NOT_AVAILABLE && diagonal_ref == PART_NOT_AVAILABLE && left_ref != PART_NOT_AVAILABLE){
809 *mx= A[0];
810 *my= A[1];
811 }else{
812 *mx= mid_pred(A[0], B[0], C[0]);
813 *my= mid_pred(A[1], B[1], C[1]);
814 }
815 }
816
817 tprintf(h->s.avctx, "pred_motion (%2d %2d %2d) (%2d %2d %2d) (%2d %2d %2d) -> (%2d %2d %2d) at %2d %2d %d list %d\n", top_ref, B[0], B[1], diagonal_ref, C[0], C[1], left_ref, A[0], A[1], ref, *mx, *my, h->s.mb_x, h->s.mb_y, n, list);
818}
819
820
98790382 821#endif /* AVCODEC_H264_H */