h264: Split h264 slice decoding from nal decoding
[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"
26b4fe82 32#include "cabac.h"
136034d8 33#include "dsputil.h"
5f401b7b 34#include "error_resilience.h"
2c541554 35#include "get_bits.h"
79dad2a9 36#include "h264chroma.h"
4693b031 37#include "h264dsp.h"
c92a30bb 38#include "h264pred.h"
e9d81735 39#include "h264qpel.h"
e0c16e4e 40#include "mpegutils.h"
d24e9a99 41#include "parser.h"
e1e94902 42#include "rectangle.h"
d24e9a99 43#include "videodsp.h"
26b4fe82 44
5d1c2e53 45#define H264_MAX_PICTURE_COUNT 32
e3c2d0f3 46#define H264_MAX_THREADS 16
5d1c2e53 47
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48#define MAX_SPS_COUNT 32
49#define MAX_PPS_COUNT 256
26b4fe82 50
be545b8a 51#define MAX_MMCO_COUNT 66
26b4fe82 52
be545b8a 53#define MAX_DELAYED_PIC_COUNT 16
64b9d48f 54
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55/* Compiling in interlaced support reduces the speed
56 * of progressive decoding by about 2%. */
57#define ALLOW_INTERLACE
58
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59#define FMO 0
60
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61/**
62 * The maximum number of slices supported by the decoder.
63 * must be a power of 2
64 */
65#define MAX_SLICES 16
66
26b4fe82 67#ifdef ALLOW_INTERLACE
82313eaa 68#define MB_MBAFF(h) h->mb_mbaff
da6be8fc 69#define MB_FIELD(h) h->mb_field_decoding_flag
7bece9b2 70#define FRAME_MBAFF(h) h->mb_aff_frame
7fa00653 71#define FIELD_PICTURE(h) (h->picture_structure != PICT_FRAME)
556f8a06 72#define LEFT_MBS 2
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73#define LTOP 0
74#define LBOT 1
75#define LEFT(i) (i)
26b4fe82 76#else
82313eaa 77#define MB_MBAFF(h) 0
da6be8fc 78#define MB_FIELD(h) 0
7bece9b2 79#define FRAME_MBAFF(h) 0
7fa00653 80#define FIELD_PICTURE(h) 0
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81#undef IS_INTERLACED
82#define IS_INTERLACED(mb_type) 0
556f8a06 83#define LEFT_MBS 1
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84#define LTOP 0
85#define LBOT 0
86#define LEFT(i) 0
26b4fe82 87#endif
a6931d8e 88#define FIELD_OR_MBAFF_PICTURE(h) (FRAME_MBAFF(h) || FIELD_PICTURE(h))
26b4fe82 89
ddd60f28 90#ifndef CABAC
6d2b6f21 91#define CABAC(h) h->pps.cabac
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92#endif
93
e962bd08 94#define CHROMA422(h) (h->sps.chroma_format_idc == 2)
23e85be5 95#define CHROMA444(h) (h->sps.chroma_format_idc == 3)
c90b9442 96
be545b8a 97#define EXTENDED_SAR 255
44ee6135 98
be545b8a 99#define MB_TYPE_REF0 MB_TYPE_ACPRED // dirty but it fits in 16 bit
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100#define MB_TYPE_8x8DCT 0x01000000
101#define IS_REF0(a) ((a) & MB_TYPE_REF0)
102#define IS_8x8DCT(a) ((a) & MB_TYPE_8x8DCT)
103
be545b8a 104#define QP_MAX_NUM (51 + 2 * 6) // The maximum supported qp
ea6f00c4 105
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106/* NAL unit types */
107enum {
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108 NAL_SLICE = 1,
109 NAL_DPA = 2,
110 NAL_DPB = 3,
111 NAL_DPC = 4,
112 NAL_IDR_SLICE = 5,
113 NAL_SEI = 6,
114 NAL_SPS = 7,
115 NAL_PPS = 8,
116 NAL_AUD = 9,
117 NAL_END_SEQUENCE = 10,
118 NAL_END_STREAM = 11,
119 NAL_FILLER_DATA = 12,
120 NAL_SPS_EXT = 13,
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121 NAL_AUXILIARY_SLICE = 19,
122 NAL_FF_IGNORE = 0xff0f001,
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123};
124
26b4fe82 125/**
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126 * SEI message types
127 */
128typedef enum {
304e916a 129 SEI_TYPE_BUFFERING_PERIOD = 0, ///< buffering period (H.264, D.1.1)
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130 SEI_TYPE_PIC_TIMING = 1, ///< picture timing
131 SEI_TYPE_USER_DATA_UNREGISTERED = 5, ///< unregistered user data
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132 SEI_TYPE_RECOVERY_POINT = 6, ///< recovery point (frame # to decoder sync)
133 SEI_TYPE_FRAME_PACKING = 45, ///< frame packing arrangement
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134} SEI_Type;
135
136/**
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137 * pic_struct in picture timing SEI message
138 */
139typedef enum {
140 SEI_PIC_STRUCT_FRAME = 0, ///< 0: %frame
141 SEI_PIC_STRUCT_TOP_FIELD = 1, ///< 1: top field
142 SEI_PIC_STRUCT_BOTTOM_FIELD = 2, ///< 2: bottom field
143 SEI_PIC_STRUCT_TOP_BOTTOM = 3, ///< 3: top field, bottom field, in that order
144 SEI_PIC_STRUCT_BOTTOM_TOP = 4, ///< 4: bottom field, top field, in that order
145 SEI_PIC_STRUCT_TOP_BOTTOM_TOP = 5, ///< 5: top field, bottom field, top field repeated, in that order
146 SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM = 6, ///< 6: bottom field, top field, bottom field repeated, in that order
147 SEI_PIC_STRUCT_FRAME_DOUBLING = 7, ///< 7: %frame doubling
148 SEI_PIC_STRUCT_FRAME_TRIPLING = 8 ///< 8: %frame tripling
149} SEI_PicStructType;
150
151/**
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152 * Sequence parameter set
153 */
be545b8a 154typedef struct SPS {
3a057670 155 unsigned int sps_id;
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156 int profile_idc;
157 int level_idc;
0af6967e 158 int chroma_format_idc;
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159 int transform_bypass; ///< qpprime_y_zero_transform_bypass_flag
160 int log2_max_frame_num; ///< log2_max_frame_num_minus4 + 4
161 int poc_type; ///< pic_order_cnt_type
162 int log2_max_poc_lsb; ///< log2_max_pic_order_cnt_lsb_minus4
163 int delta_pic_order_always_zero_flag;
164 int offset_for_non_ref_pic;
165 int offset_for_top_to_bottom_field;
166 int poc_cycle_length; ///< num_ref_frames_in_pic_order_cnt_cycle
167 int ref_frame_count; ///< num_ref_frames
168 int gaps_in_frame_num_allowed_flag;
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169 int mb_width; ///< pic_width_in_mbs_minus1 + 1
170 int mb_height; ///< pic_height_in_map_units_minus1 + 1
26b4fe82 171 int frame_mbs_only_flag;
be545b8a 172 int mb_aff; ///< mb_adaptive_frame_field_flag
26b4fe82 173 int direct_8x8_inference_flag;
be545b8a 174 int crop; ///< frame_cropping_flag
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175
176 /* those 4 are already in luma samples */
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177 unsigned int crop_left; ///< frame_cropping_rect_left_offset
178 unsigned int crop_right; ///< frame_cropping_rect_right_offset
179 unsigned int crop_top; ///< frame_cropping_rect_top_offset
180 unsigned int crop_bottom; ///< frame_cropping_rect_bottom_offset
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181 int vui_parameters_present_flag;
182 AVRational sar;
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183 int video_signal_type_present_flag;
184 int full_range;
185 int colour_description_present_flag;
186 enum AVColorPrimaries color_primaries;
187 enum AVColorTransferCharacteristic color_trc;
188 enum AVColorSpace colorspace;
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189 int timing_info_present_flag;
190 uint32_t num_units_in_tick;
191 uint32_t time_scale;
192 int fixed_frame_rate_flag;
be545b8a 193 short offset_for_ref_frame[256]; // FIXME dyn aloc?
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194 int bitstream_restriction_flag;
195 int num_reorder_frames;
196 int scaling_matrix_present;
197 uint8_t scaling_matrix4[6][16];
c90b9442 198 uint8_t scaling_matrix8[6][64];
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199 int nal_hrd_parameters_present_flag;
200 int vcl_hrd_parameters_present_flag;
201 int pic_struct_present_flag;
202 int time_offset_length;
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203 int cpb_cnt; ///< See H.264 E.1.2
204 int initial_cpb_removal_delay_length; ///< initial_cpb_removal_delay_length_minus1 + 1
205 int cpb_removal_delay_length; ///< cpb_removal_delay_length_minus1 + 1
206 int dpb_output_delay_length; ///< dpb_output_delay_length_minus1 + 1
207 int bit_depth_luma; ///< bit_depth_luma_minus8 + 8
208 int bit_depth_chroma; ///< bit_depth_chroma_minus8 + 8
209 int residual_color_transform_flag; ///< residual_colour_transform_flag
210 int constraint_set_flags; ///< constraint_set[0-3]_flag
072be3e8 211 int new; ///< flag to keep track if the decoder context needs re-init due to changed SPS
be545b8a 212} SPS;
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213
214/**
215 * Picture parameter set
216 */
be545b8a 217typedef struct PPS {
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218 unsigned int sps_id;
219 int cabac; ///< entropy_coding_mode_flag
220 int pic_order_present; ///< pic_order_present_flag
221 int slice_group_count; ///< num_slice_groups_minus1 + 1
222 int mb_slice_group_map_type;
223 unsigned int ref_count[2]; ///< num_ref_idx_l0/1_active_minus1 + 1
224 int weighted_pred; ///< weighted_pred_flag
225 int weighted_bipred_idc;
226 int init_qp; ///< pic_init_qp_minus26 + 26
227 int init_qs; ///< pic_init_qs_minus26 + 26
4691a77d 228 int chroma_qp_index_offset[2];
26b4fe82 229 int deblocking_filter_parameters_present; ///< deblocking_filter_parameters_present_flag
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230 int constrained_intra_pred; ///< constrained_intra_pred_flag
231 int redundant_pic_cnt_present; ///< redundant_pic_cnt_present_flag
232 int transform_8x8_mode; ///< transform_8x8_mode_flag
26b4fe82 233 uint8_t scaling_matrix4[6][16];
c90b9442 234 uint8_t scaling_matrix8[6][64];
be545b8a 235 uint8_t chroma_qp_table[2][64]; ///< pre-scaled (with chroma_qp_index_offset) version of qp_table
4691a77d 236 int chroma_qp_diff;
be545b8a 237} PPS;
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238
239/**
240 * Memory management control operation opcode.
241 */
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242typedef enum MMCOOpcode {
243 MMCO_END = 0,
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244 MMCO_SHORT2UNUSED,
245 MMCO_LONG2UNUSED,
246 MMCO_SHORT2LONG,
247 MMCO_SET_MAX_LONG,
248 MMCO_RESET,
249 MMCO_LONG,
250} MMCOOpcode;
251
252/**
253 * Memory management control operation.
254 */
be545b8a 255typedef struct MMCO {
26b4fe82 256 MMCOOpcode opcode;
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257 int short_pic_num; ///< pic_num without wrapping (pic_num & max_pic_num)
258 int long_arg; ///< index, pic_num, or num long refs depending on opcode
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259} MMCO;
260
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261typedef struct H264Picture {
262 struct AVFrame f;
263 ThreadFrame tf;
264
265 AVBufferRef *qscale_table_buf;
266 int8_t *qscale_table;
267
268 AVBufferRef *motion_val_buf[2];
269 int16_t (*motion_val[2])[2];
270
271 AVBufferRef *mb_type_buf;
272 uint32_t *mb_type;
273
274 AVBufferRef *hwaccel_priv_buf;
275 void *hwaccel_picture_private; ///< hardware accelerator private data
276
277 AVBufferRef *ref_index_buf[2];
278 int8_t *ref_index[2];
279
280 int field_poc[2]; ///< top/bottom POC
281 int poc; ///< frame POC
282 int frame_num; ///< frame_num (raw frame_num from slice header)
283 int mmco_reset; /**< MMCO_RESET set this 1. Reordering code must
284 not mix pictures before and after MMCO_RESET. */
285 int pic_id; /**< pic_num (short -> no wrap version of pic_num,
286 pic_num & max_pic_num; long -> long_pic_num) */
287 int long_ref; ///< 1->long term reference 0->short term reference
288 int ref_poc[2][2][32]; ///< POCs of the frames used as reference (FIXME need per slice)
289 int ref_count[2][2]; ///< number of entries in ref_poc (FIXME need per slice)
290 int mbaff; ///< 1 -> MBAFF frame 0-> not MBAFF
291 int field_picture; ///< whether or not picture was encoded in separate fields
292
293 int needs_realloc; ///< picture needs to be reallocated (eg due to a frame size change)
294 int reference;
295 int recovered; ///< picture at IDR or recovery point + recovery count
296} H264Picture;
297
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298/**
299 * H264Context
300 */
be545b8a 301typedef struct H264Context {
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302 AVCodecContext *avctx;
303 DSPContext dsp;
304 VideoDSPContext vdsp;
4693b031 305 H264DSPContext h264dsp;
79dad2a9 306 H264ChromaContext h264chroma;
e9d81735 307 H264QpelContext h264qpel;
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308 ParseContext parse_context;
309 GetBitContext gb;
310 ERContext er;
311
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312 H264Picture *DPB;
313 H264Picture *cur_pic_ptr;
314 H264Picture cur_pic;
2c541554 315
6e3ef511 316 int pixel_shift; ///< 0 for 8-bit H264, 1 for high-bit-depth H264
be545b8a 317 int chroma_qp[2]; // QPc
26b4fe82 318
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319 int qp_thresh; ///< QP threshold to skip loopfilter
320
5e83d9ac 321 /* coded dimensions -- 16 * mb w/h */
2c541554 322 int width, height;
93f30547 323 ptrdiff_t linesize, uvlinesize;
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324 int chroma_x_shift, chroma_y_shift;
325
326 int qscale;
327 int droppable;
328 int data_partitioning;
329 int coded_picture_number;
330 int low_delay;
331
332 int context_initialized;
333 int flags;
334 int workaround_bugs;
335
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336 int prev_mb_skipped;
337 int next_mb_skipped;
338
be545b8a 339 // prediction stuff
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340 int chroma_pred_mode;
341 int intra16x16_pred_mode;
342
c1bb66ac 343 int topleft_mb_xy;
26b4fe82 344 int top_mb_xy;
c1bb66ac 345 int topright_mb_xy;
556f8a06 346 int left_mb_xy[LEFT_MBS];
26b4fe82 347
c1bb66ac 348 int topleft_type;
99344d43 349 int top_type;
c1bb66ac 350 int topright_type;
556f8a06 351 int left_type[LEFT_MBS];
99344d43 352
be545b8a 353 const uint8_t *left_block;
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354 int topleft_partition;
355
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356 int8_t intra4x4_pred_mode_cache[5 * 8];
357 int8_t(*intra4x4_pred_mode);
c92a30bb 358 H264PredContext hpc;
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359 unsigned int topleft_samples_available;
360 unsigned int top_samples_available;
361 unsigned int topright_samples_available;
362 unsigned int left_samples_available;
be545b8a 363 uint8_t (*top_borders[2])[(16 * 3) * 2];
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364
365 /**
366 * non zero coeff count cache.
367 * is 64 if not available.
368 */
be545b8a 369 DECLARE_ALIGNED(8, uint8_t, non_zero_count_cache)[15 * 8];
b6303e6d 370
c90b9442 371 uint8_t (*non_zero_count)[48];
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372
373 /**
374 * Motion vector cache.
375 */
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376 DECLARE_ALIGNED(16, int16_t, mv_cache)[2][5 * 8][2];
377 DECLARE_ALIGNED(8, int8_t, ref_cache)[2][5 * 8];
378#define LIST_NOT_USED -1 // FIXME rename?
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379#define PART_NOT_AVAILABLE -2
380
381 /**
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382 * number of neighbors (top and/or left) that used 8x8 dct
383 */
384 int neighbor_transform_size;
385
386 /**
387 * block_offset[ 0..23] for frame macroblocks
388 * block_offset[24..47] for field macroblocks
389 */
be545b8a 390 int block_offset[2 * (16 * 3)];
26b4fe82 391
be545b8a 392 uint32_t *mb2b_xy; // FIXME are these 4 a good idea?
d43c1922 393 uint32_t *mb2br_xy;
be545b8a 394 int b_stride; // FIXME use s->b4_stride
26b4fe82 395
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396 ptrdiff_t mb_linesize; ///< may be equal to s->linesize or s->linesize * 2, for mbaff
397 ptrdiff_t mb_uvlinesize;
26b4fe82 398
26b4fe82 399 SPS sps; ///< current sps
15210354 400 PPS pps; ///< current pps
26b4fe82 401
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402 uint32_t dequant4_buffer[6][QP_MAX_NUM + 1][16]; // FIXME should these be moved down?
403 uint32_t dequant8_buffer[6][QP_MAX_NUM + 1][64];
404 uint32_t(*dequant4_coeff[6])[16];
405 uint32_t(*dequant8_coeff[6])[64];
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406
407 int slice_num;
be545b8a 408 uint16_t *slice_table; ///< slice_table_base + 2*mb_stride + 1
26b4fe82 409 int slice_type;
be545b8a 410 int slice_type_nos; ///< S free slice type (SI/SP are remapped to I/P)
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411 int slice_type_fixed;
412
be545b8a 413 // interlacing specific flags
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414 int mb_aff_frame;
415 int mb_field_decoding_flag;
be545b8a 416 int mb_mbaff; ///< mb_aff_frame && mb_field_decoding_flag
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417 int picture_structure;
418 int first_field;
26b4fe82 419
84dc2d8a 420 DECLARE_ALIGNED(8, uint16_t, sub_mb_type)[4];
26b4fe82 421
be545b8a 422 // Weighted pred stuff
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423 int use_weight;
424 int use_weight_chroma;
425 int luma_log2_weight_denom;
426 int chroma_log2_weight_denom;
be545b8a 427 // The following 2 can be changed to int8_t but that causes 10cpu cycles speedloss
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428 int luma_weight[48][2][2];
429 int chroma_weight[48][2][2][2];
1052b76f 430 int implicit_weight[48][48][2];
26b4fe82 431
26b4fe82 432 int direct_spatial_mv_pred;
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433 int col_parity;
434 int col_fieldoff;
73ad2c2f 435 int dist_scale_factor[32];
8b1fd554 436 int dist_scale_factor_field[2][32];
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437 int map_col_to_list0[2][16 + 32];
438 int map_col_to_list0_field[2][2][16 + 32];
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439
440 /**
441 * num_ref_idx_l0/1_active_minus1 + 1
442 */
be545b8a 443 unsigned int ref_count[2]; ///< counts frames or fields, depending on current mb mode
26b4fe82 444 unsigned int list_count;
be545b8a 445 uint8_t *list_counts; ///< Array of list_count per MB specifying the slice type
9b749c82 446 H264Picture ref_list[2][48]; /**< 0..15: frame refs, 16..47: mbaff field refs.
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447 * Reordered version of default_ref_list
448 * according to picture reordering in slice header */
449 int ref2frm[MAX_SLICES][2][64]; ///< reference to frame number lists, used in the loop filter, the first 2 are for -2,-1
26b4fe82 450
be545b8a 451 // data partitioning
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452 GetBitContext intra_gb;
453 GetBitContext inter_gb;
454 GetBitContext *intra_gb_ptr;
455 GetBitContext *inter_gb_ptr;
456
7ebfb466 457 const uint8_t *intra_pcm_ptr;
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458 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.
459 DECLARE_ALIGNED(16, int16_t, mb_luma_dc)[3][16 * 2];
460 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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461
462 /**
463 * Cabac
464 */
465 CABACContext cabac;
be545b8a 466 uint8_t cabac_state[1024];
26b4fe82 467
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468 /* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0, 1, 2), 0x0? luma_cbp */
469 uint16_t *cbp_table;
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470 int cbp;
471 int top_cbp;
472 int left_cbp;
473 /* chroma_pred_mode for i4x4 or i16x16, else 0 */
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474 uint8_t *chroma_pred_mode_table;
475 int last_qscale_diff;
476 uint8_t (*mvd_table[2])[2];
477 DECLARE_ALIGNED(16, uint8_t, mvd_cache)[2][5 * 8][2];
478 uint8_t *direct_table;
479 uint8_t direct_cache[5 * 8];
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480
481 uint8_t zigzag_scan[16];
482 uint8_t zigzag_scan8x8[64];
483 uint8_t zigzag_scan8x8_cavlc[64];
484 uint8_t field_scan[16];
485 uint8_t field_scan8x8[64];
486 uint8_t field_scan8x8_cavlc[64];
487 const uint8_t *zigzag_scan_q0;
488 const uint8_t *zigzag_scan8x8_q0;
489 const uint8_t *zigzag_scan8x8_cavlc_q0;
490 const uint8_t *field_scan_q0;
491 const uint8_t *field_scan8x8_q0;
492 const uint8_t *field_scan8x8_cavlc_q0;
493
494 int x264_build;
afebe2f7 495
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496 int mb_x, mb_y;
497 int resync_mb_x;
498 int resync_mb_y;
499 int mb_skip_run;
500 int mb_height, mb_width;
501 int mb_stride;
502 int mb_num;
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503 int mb_xy;
504
505 int is_complex;
506
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507 // deblock
508 int deblocking_filter; ///< disable_deblocking_filter_idc with 1 <-> 0
bd8868e0
MN
509 int slice_alpha_c0_offset;
510 int slice_beta_offset;
511
be545b8a
DB
512 // =============================================================
513 // Things below are not used in the MB or more inner code
bd8868e0
MN
514
515 int nal_ref_idc;
516 int nal_unit_type;
517 uint8_t *rbsp_buffer[2];
518 unsigned int rbsp_buffer_size[2];
519
520 /**
521 * Used to parse AVC variant of h264
522 */
be545b8a
DB
523 int is_avc; ///< this flag is != 0 if codec is avc1
524 int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)
525 int got_first; ///< this flag is != 0 if we've parsed a frame
bd8868e0 526
2c541554
AK
527 int bit_depth_luma; ///< luma bit depth from sps to detect changes
528 int chroma_format_idc; ///< chroma format from sps to detect changes
9e696d2e 529
bd8868e0
MN
530 SPS *sps_buffers[MAX_SPS_COUNT];
531 PPS *pps_buffers[MAX_PPS_COUNT];
532
be545b8a 533 int dequant_coeff_pps; ///< reinit tables when pps changes
bd8868e0
MN
534
535 uint16_t *slice_table_base;
536
be545b8a 537 // POC stuff
bd8868e0
MN
538 int poc_lsb;
539 int poc_msb;
540 int delta_poc_bottom;
541 int delta_poc[2];
542 int frame_num;
be545b8a
DB
543 int prev_poc_msb; ///< poc_msb of the last reference pic for POC type 0
544 int prev_poc_lsb; ///< poc_lsb of the last reference pic for POC type 0
545 int frame_num_offset; ///< for POC type 2
546 int prev_frame_num_offset; ///< for POC type 2
547 int prev_frame_num; ///< frame_num of the last pic for POC type 1/2
bd8868e0
MN
548
549 /**
be545b8a 550 * frame_num for frames or 2 * frame_num + 1 for field pics.
bd8868e0
MN
551 */
552 int curr_pic_num;
553
554 /**
be545b8a 555 * max_frame_num or 2 * max_frame_num for field pics.
bd8868e0
MN
556 */
557 int max_pic_num;
558
559 int redundant_pic_count;
560
9b749c82
VG
561 H264Picture default_ref_list[2][32]; ///< base reference list for all slices of a coded picture
562 H264Picture *short_ref[32];
563 H264Picture *long_ref[32];
564 H264Picture *delayed_pic[MAX_DELAYED_PIC_COUNT + 2]; // FIXME size?
ea2bb12e 565 int last_pocs[MAX_DELAYED_PIC_COUNT];
9b749c82 566 H264Picture *next_output_pic;
bd8868e0 567 int outputed_poc;
6a9c8594 568 int next_outputed_poc;
bd8868e0
MN
569
570 /**
571 * memory management control operations buffer.
572 */
573 MMCO mmco[MAX_MMCO_COUNT];
574 int mmco_index;
adedd840 575 int mmco_reset;
bd8868e0 576
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DB
577 int long_ref_count; ///< number of actual long term references
578 int short_ref_count; ///< number of actual short term references
bd8868e0 579
be545b8a 580 int cabac_init_idc;
bd8868e0 581
afebe2f7 582 /**
21a19b79 583 * @name Members for slice based multithreading
afebe2f7
584 * @{
585 */
e3c2d0f3 586 struct H264Context *thread_context[H264_MAX_THREADS];
afebe2f7
587
588 /**
589 * current slice number, used to initalize slice_num of each thread/context
590 */
591 int current_slice;
592
593 /**
594 * Max number of threads / contexts.
595 * This is equal to AVCodecContext.thread_count unless
596 * multithreaded decoding is impossible, in which case it is
597 * reduced to 1.
598 */
599 int max_contexts;
600
2c541554
AK
601 int slice_context_count;
602
afebe2f7
603 /**
604 * 1 if the single thread fallback warning has already been
605 * displayed, 0 otherwise.
606 */
607 int single_decode_warning;
608
2c541554
AK
609 enum AVPictureType pict_type;
610
afebe2f7
611 int last_slice_type;
612 /** @} */
613
b09a7c05
614 /**
615 * pic_struct in picture timing SEI message
616 */
617 SEI_PicStructType sei_pic_struct;
89db0bae 618
37a558fe 619 /**
b19d493f
HY
620 * Complement sei_pic_struct
621 * SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced frames.
622 * However, soft telecined frames may have these values.
623 * This is used in an attempt to flag soft telecine progressive.
624 */
625 int prev_interlaced_frame;
626
627 /**
5b10ef72
VG
628 * frame_packing_arrangment SEI message
629 */
630 int sei_frame_packing_present;
631 int frame_packing_arrangement_type;
632 int content_interpretation_type;
633 int quincunx_subsampling;
634
635 /**
70e01da3
IS
636 * Bit set of clock types for fields/frames in picture timing SEI message.
637 * For each found ct_type, appropriate bit is set (e.g., bit 1 for
638 * interlaced).
639 */
640 int sei_ct_type;
641
642 /**
ff594f81
IS
643 * dpb_output_delay in picture timing SEI message, see H.264 C.2.2
644 */
645 int sei_dpb_output_delay;
646
647 /**
cf6065ca
IS
648 * cpb_removal_delay in picture timing SEI message, see H.264 C.1.2
649 */
650 int sei_cpb_removal_delay;
651
652 /**
37a558fe
IS
653 * recovery_frame_cnt from SEI message
654 *
655 * Set to -1 if no recovery point SEI message found or to number of frames
656 * before playback synchronizes. Frames having recovery point are key
657 * frames.
658 */
659 int sei_recovery_frame_cnt;
660
28096e0a
JS
661 /**
662 * recovery_frame is the frame_num at which the next frame should
663 * be fully constructed.
664 *
665 * Set to -1 when not expecting a recovery point.
666 */
667 int recovery_frame;
668
669/**
670 * We have seen an IDR, so all the following frames in coded order are correctly
671 * decodable.
672 */
673#define FRAME_RECOVERED_IDR (1 << 0)
674/**
675 * Sufficient number of frames have been decoded since a SEI recovery point,
676 * so all the following frames in presentation order are correct.
677 */
678#define FRAME_RECOVERED_SEI (1 << 1)
679
680 int frame_recovered; ///< Initial frame has been completely recovered
681
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DB
682 int luma_weight_flag[2]; ///< 7.4.3.2 luma_weight_lX_flag
683 int chroma_weight_flag[2]; ///< 7.4.3.2 chroma_weight_lX_flag
2ea89d92
IS
684
685 // Timestamp stuff
be545b8a
DB
686 int sei_buffering_period_present; ///< Buffering period SEI flag
687 int initial_cpb_removal_delay[32]; ///< Initial timestamps for CPBs
76741b0e
BC
688
689 int cur_chroma_format_idc;
a394959b 690 uint8_t *bipred_scratchpad;
2c541554
AK
691 uint8_t *edge_emu_buffer;
692 int16_t *dc_val_base;
759001c5
AK
693
694 AVBufferPool *qscale_table_pool;
695 AVBufferPool *mb_type_pool;
696 AVBufferPool *motion_val_pool;
697 AVBufferPool *ref_index_pool;
136034d8
VG
698
699 /* Motion Estimation */
700 qpel_mc_func (*qpel_put)[16];
701 qpel_mc_func (*qpel_avg)[16];
be545b8a 702} H264Context;
26b4fe82 703
be545b8a 704extern 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 705extern const uint16_t ff_h264_mb_sizes[4];
889fce8e 706
1790a5e9
IS
707/**
708 * Decode SEI
709 */
710int ff_h264_decode_sei(H264Context *h);
711
712/**
713 * Decode SPS
714 */
715int ff_h264_decode_seq_parameter_set(H264Context *h);
716
717/**
fe9a3fbe
JG
718 * compute profile from sps
719 */
720int ff_h264_get_profile(SPS *sps);
721
722/**
1790a5e9
IS
723 * Decode PPS
724 */
725int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length);
726
727/**
49bd8e4b 728 * Decode a network abstraction layer unit.
1790a5e9
IS
729 * @param consumed is the number of bytes used as input
730 * @param length is the length of the array
be545b8a
DB
731 * @param dst_length is the number of decoded bytes FIXME here
732 * or a decode rbsp tailing?
32e543f8 733 * @return decoded bytes, might be src+1 if no escapes
1790a5e9 734 */
be545b8a
DB
735const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src,
736 int *dst_length, int *consumed, int length);
1790a5e9
IS
737
738/**
be545b8a
DB
739 * Free any data that may have been allocated in the H264 context
740 * like SPS, PPS etc.
15861962 741 */
94ee7da0 742void ff_h264_free_context(H264Context *h);
15861962 743
75dd6938 744/**
49bd8e4b 745 * Reconstruct bitstream slice_type.
75dd6938 746 */
0dc343d4 747int ff_h264_get_slice_type(const H264Context *h);
75dd6938 748
903d58f6 749/**
49bd8e4b 750 * Allocate tables.
903d58f6
MN
751 * needs width/height
752 */
753int ff_h264_alloc_tables(H264Context *h);
754
755/**
49bd8e4b 756 * Fill the default_ref_list.
ea6f00c4
MN
757 */
758int ff_h264_fill_default_ref_list(H264Context *h);
759
760int ff_h264_decode_ref_pic_list_reordering(H264Context *h);
761void ff_h264_fill_mbaff_ref_list(H264Context *h);
762void ff_h264_remove_all_refs(H264Context *h);
763
764/**
49bd8e4b 765 * Execute the reference picture marking (memory management control operations).
ea6f00c4
MN
766 */
767int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count);
768
bad446e2
RB
769int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb,
770 int first_slice);
ea6f00c4 771
ea382767 772int ff_generate_sliding_window_mmcos(H264Context *h, int first_slice);
733f5990 773
ea6f00c4 774/**
be545b8a
DB
775 * Check if the top & left blocks are available if needed & change the
776 * dc mode so it only uses the available blocks.
903d58f6 777 */
2bedc0e8
MN
778int ff_h264_check_intra4x4_pred_mode(H264Context *h);
779
780/**
be545b8a
DB
781 * Check if the top & left blocks are available if needed & change the
782 * dc mode so it only uses the available blocks.
2bedc0e8 783 */
45b7bd7c 784int ff_h264_check_intra_pred_mode(H264Context *h, int mode, int is_chroma);
903d58f6 785
903d58f6 786void ff_h264_hl_decode_mb(H264Context *h);
05e95319 787int ff_h264_decode_extradata(H264Context *h);
94ee7da0
DB
788int ff_h264_decode_init(AVCodecContext *avctx);
789void ff_h264_decode_init_vlc(void);
e1e94902
MN
790
791/**
49bd8e4b 792 * Decode a macroblock
be545b8a 793 * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error
e1e94902
MN
794 */
795int ff_h264_decode_mb_cavlc(H264Context *h);
903d58f6 796
cc51b282 797/**
49bd8e4b 798 * Decode a CABAC coded macroblock
be545b8a 799 * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error
cc51b282
MN
800 */
801int ff_h264_decode_mb_cabac(H264Context *h);
802
803void ff_h264_init_cabac_states(H264Context *h);
804
f51d0f39
LB
805void h264_init_dequant_tables(H264Context *h);
806
be545b8a
DB
807void ff_h264_direct_dist_scale_factor(H264Context *const h);
808void ff_h264_direct_ref_list_init(H264Context *const h);
809void ff_h264_pred_direct_motion(H264Context *const h, int *mb_type);
943f69a6 810
be545b8a
DB
811void ff_h264_filter_mb_fast(H264Context *h, int mb_x, int mb_y,
812 uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr,
813 unsigned int linesize, unsigned int uvlinesize);
814void ff_h264_filter_mb(H264Context *h, int mb_x, int mb_y,
815 uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr,
816 unsigned int linesize, unsigned int uvlinesize);
082cf971 817
9c095463
MN
818/**
819 * Reset SEI values at the beginning of the frame.
820 *
821 * @param h H.264 context.
822 */
823void ff_h264_reset_sei(H264Context *h);
824
903d58f6 825/*
be545b8a
DB
826 * o-o o-o
827 * / / /
828 * o-o o-o
829 * ,---'
830 * o-o o-o
831 * / / /
832 * o-o o-o
833 */
5657d140
JGG
834
835/* Scan8 organization:
c90b9442
JGG
836 * 0 1 2 3 4 5 6 7
837 * 0 DY y y y y y
838 * 1 y Y Y Y Y
839 * 2 y Y Y Y Y
840 * 3 y Y Y Y Y
841 * 4 y Y Y Y Y
842 * 5 DU u u u u u
843 * 6 u U U U U
844 * 7 u U U U U
845 * 8 u U U U U
846 * 9 u U U U U
847 * 10 DV v v v v v
848 * 11 v V V V V
849 * 12 v V V V V
850 * 13 v V V V V
851 * 14 v V V V V
5657d140
JGG
852 * DY/DU/DV are for luma/chroma DC.
853 */
854
c90b9442
JGG
855#define LUMA_DC_BLOCK_INDEX 48
856#define CHROMA_DC_BLOCK_INDEX 49
857
be545b8a
DB
858// This table must be here because scan8[constant] must be known at compiletime
859static const uint8_t scan8[16 * 3 + 3] = {
860 4 + 1 * 8, 5 + 1 * 8, 4 + 2 * 8, 5 + 2 * 8,
861 6 + 1 * 8, 7 + 1 * 8, 6 + 2 * 8, 7 + 2 * 8,
862 4 + 3 * 8, 5 + 3 * 8, 4 + 4 * 8, 5 + 4 * 8,
863 6 + 3 * 8, 7 + 3 * 8, 6 + 4 * 8, 7 + 4 * 8,
864 4 + 6 * 8, 5 + 6 * 8, 4 + 7 * 8, 5 + 7 * 8,
865 6 + 6 * 8, 7 + 6 * 8, 6 + 7 * 8, 7 + 7 * 8,
866 4 + 8 * 8, 5 + 8 * 8, 4 + 9 * 8, 5 + 9 * 8,
867 6 + 8 * 8, 7 + 8 * 8, 6 + 9 * 8, 7 + 9 * 8,
868 4 + 11 * 8, 5 + 11 * 8, 4 + 12 * 8, 5 + 12 * 8,
869 6 + 11 * 8, 7 + 11 * 8, 6 + 12 * 8, 7 + 12 * 8,
870 4 + 13 * 8, 5 + 13 * 8, 4 + 14 * 8, 5 + 14 * 8,
871 6 + 13 * 8, 7 + 13 * 8, 6 + 14 * 8, 7 + 14 * 8,
872 0 + 0 * 8, 0 + 5 * 8, 0 + 10 * 8
903d58f6
MN
873};
874
be545b8a
DB
875static av_always_inline uint32_t pack16to32(int a, int b)
876{
903d58f6 877#if HAVE_BIGENDIAN
be545b8a 878 return (b & 0xFFFF) + (a << 16);
903d58f6 879#else
be545b8a 880 return (a & 0xFFFF) + (b << 16);
903d58f6
MN
881#endif
882}
883
be545b8a
DB
884static av_always_inline uint16_t pack8to16(int a, int b)
885{
b5bd0700 886#if HAVE_BIGENDIAN
be545b8a 887 return (b & 0xFF) + (a << 8);
b5bd0700 888#else
be545b8a 889 return (a & 0xFF) + (b << 8);
b5bd0700
MN
890#endif
891}
892
903d58f6 893/**
58c42af7 894 * Get the chroma qp.
082cf971 895 */
be545b8a
DB
896static av_always_inline int get_chroma_qp(H264Context *h, int t, int qscale)
897{
082cf971
MN
898 return h->pps.chroma_qp_table[t][qscale];
899}
900
44a5e7b6 901/**
58c42af7 902 * Get the predicted intra4x4 prediction mode.
e1e94902 903 */
be545b8a
DB
904static av_always_inline int pred_intra_mode(H264Context *h, int n)
905{
906 const int index8 = scan8[n];
907 const int left = h->intra4x4_pred_mode_cache[index8 - 1];
908 const int top = h->intra4x4_pred_mode_cache[index8 - 8];
909 const int min = FFMIN(left, top);
e1e94902 910
2c541554 911 tprintf(h->avctx, "mode:%d %d min:%d\n", left, top, min);
e1e94902 912
be545b8a
DB
913 if (min < 0)
914 return DC_PRED;
915 else
916 return min;
e1e94902
MN
917}
918
be545b8a
DB
919static av_always_inline void write_back_intra_pred_mode(H264Context *h)
920{
921 int8_t *i4x4 = h->intra4x4_pred_mode + h->mb2br_xy[h->mb_xy];
922 int8_t *i4x4_cache = h->intra4x4_pred_mode_cache;
3b7ebeb4 923
be545b8a
DB
924 AV_COPY32(i4x4, i4x4_cache + 4 + 8 * 4);
925 i4x4[4] = i4x4_cache[7 + 8 * 3];
926 i4x4[5] = i4x4_cache[7 + 8 * 2];
927 i4x4[6] = i4x4_cache[7 + 8 * 1];
3b7ebeb4 928}
e1e94902 929
be545b8a
DB
930static av_always_inline void write_back_non_zero_count(H264Context *h)
931{
932 const int mb_xy = h->mb_xy;
933 uint8_t *nnz = h->non_zero_count[mb_xy];
3b7ebeb4
JGG
934 uint8_t *nnz_cache = h->non_zero_count_cache;
935
be545b8a
DB
936 AV_COPY32(&nnz[ 0], &nnz_cache[4 + 8 * 1]);
937 AV_COPY32(&nnz[ 4], &nnz_cache[4 + 8 * 2]);
938 AV_COPY32(&nnz[ 8], &nnz_cache[4 + 8 * 3]);
939 AV_COPY32(&nnz[12], &nnz_cache[4 + 8 * 4]);
940 AV_COPY32(&nnz[16], &nnz_cache[4 + 8 * 6]);
941 AV_COPY32(&nnz[20], &nnz_cache[4 + 8 * 7]);
942 AV_COPY32(&nnz[32], &nnz_cache[4 + 8 * 11]);
943 AV_COPY32(&nnz[36], &nnz_cache[4 + 8 * 12]);
944
2c541554 945 if (!h->chroma_y_shift) {
be545b8a
DB
946 AV_COPY32(&nnz[24], &nnz_cache[4 + 8 * 8]);
947 AV_COPY32(&nnz[28], &nnz_cache[4 + 8 * 9]);
948 AV_COPY32(&nnz[40], &nnz_cache[4 + 8 * 13]);
949 AV_COPY32(&nnz[44], &nnz_cache[4 + 8 * 14]);
3b7ebeb4
JGG
950 }
951}
952
be545b8a 953static av_always_inline void write_back_motion_list(H264Context *h,
be545b8a
DB
954 int b_stride,
955 int b_xy, int b8_xy,
956 int mb_type, int list)
3b7ebeb4 957{
759001c5 958 int16_t(*mv_dst)[2] = &h->cur_pic.motion_val[list][b_xy];
be545b8a
DB
959 int16_t(*mv_src)[2] = &h->mv_cache[list][scan8[0]];
960 AV_COPY128(mv_dst + 0 * b_stride, mv_src + 8 * 0);
961 AV_COPY128(mv_dst + 1 * b_stride, mv_src + 8 * 1);
962 AV_COPY128(mv_dst + 2 * b_stride, mv_src + 8 * 2);
963 AV_COPY128(mv_dst + 3 * b_stride, mv_src + 8 * 3);
6d2b6f21 964 if (CABAC(h)) {
be545b8a
DB
965 uint8_t (*mvd_dst)[2] = &h->mvd_table[list][FMO ? 8 * h->mb_xy
966 : h->mb2br_xy[h->mb_xy]];
967 uint8_t(*mvd_src)[2] = &h->mvd_cache[list][scan8[0]];
968 if (IS_SKIP(mb_type)) {
3b7ebeb4 969 AV_ZERO128(mvd_dst);
be545b8a
DB
970 } else {
971 AV_COPY64(mvd_dst, mvd_src + 8 * 3);
972 AV_COPY16(mvd_dst + 3 + 3, mvd_src + 3 + 8 * 0);
973 AV_COPY16(mvd_dst + 3 + 2, mvd_src + 3 + 8 * 1);
974 AV_COPY16(mvd_dst + 3 + 1, mvd_src + 3 + 8 * 2);
3b7ebeb4
JGG
975 }
976 }
977
978 {
759001c5 979 int8_t *ref_index = &h->cur_pic.ref_index[list][b8_xy];
3b7ebeb4 980 int8_t *ref_cache = h->ref_cache[list];
be545b8a
DB
981 ref_index[0 + 0 * 2] = ref_cache[scan8[0]];
982 ref_index[1 + 0 * 2] = ref_cache[scan8[4]];
983 ref_index[0 + 1 * 2] = ref_cache[scan8[8]];
984 ref_index[1 + 1 * 2] = ref_cache[scan8[12]];
c90b9442 985 }
e1e94902
MN
986}
987
be545b8a
DB
988static av_always_inline void write_back_motion(H264Context *h, int mb_type)
989{
be545b8a 990 const int b_stride = h->b_stride;
2c541554 991 const int b_xy = 4 * h->mb_x + 4 * h->mb_y * h->b_stride; // try mb2b(8)_xy
be545b8a 992 const int b8_xy = 4 * h->mb_xy;
e1e94902 993
be545b8a 994 if (USES_LIST(mb_type, 0)) {
2c541554 995 write_back_motion_list(h, b_stride, b_xy, b8_xy, mb_type, 0);
be545b8a 996 } else {
759001c5 997 fill_rectangle(&h->cur_pic.ref_index[0][b8_xy],
657ccb5a 998 2, 2, 2, (uint8_t)LIST_NOT_USED, 1);
3b7ebeb4 999 }
be545b8a 1000 if (USES_LIST(mb_type, 1))
2c541554 1001 write_back_motion_list(h, b_stride, b_xy, b8_xy, mb_type, 1);
e1e94902 1002
6d2b6f21 1003 if (h->slice_type_nos == AV_PICTURE_TYPE_B && CABAC(h)) {
be545b8a
DB
1004 if (IS_8X8(mb_type)) {
1005 uint8_t *direct_table = &h->direct_table[4 * h->mb_xy];
1006 direct_table[1] = h->sub_mb_type[1] >> 1;
1007 direct_table[2] = h->sub_mb_type[2] >> 1;
1008 direct_table[3] = h->sub_mb_type[3] >> 1;
e1e94902
MN
1009 }
1010 }
1011}
1012
be545b8a
DB
1013static av_always_inline int get_dct8x8_allowed(H264Context *h)
1014{
1015 if (h->sps.direct_8x8_inference_flag)
1016 return !(AV_RN64A(h->sub_mb_type) &
1017 ((MB_TYPE_16x8 | MB_TYPE_8x16 | MB_TYPE_8x8) *
1018 0x0001000100010001ULL));
e1e94902 1019 else
be545b8a
DB
1020 return !(AV_RN64A(h->sub_mb_type) &
1021 ((MB_TYPE_16x8 | MB_TYPE_8x16 | MB_TYPE_8x8 | MB_TYPE_DIRECT2) *
1022 0x0001000100010001ULL));
e1e94902
MN
1023}
1024
f51d0f39
LB
1025int ff_h264_field_end(H264Context *h, int in_setup);
1026
1027int ff_h264_ref_picture(H264Context *h, H264Picture *dst, H264Picture *src);
1028void ff_h264_unref_picture(H264Context *h, H264Picture *pic);
1029
1030int ff_h264_context_init(H264Context *h);
1031int ff_h264_set_parameter_from_sps(H264Context *h);
1032
2c541554 1033void ff_h264_draw_horiz_band(H264Context *h, int y, int height);
3f1a7ceb 1034int ff_init_poc(H264Context *h, int pic_field_poc[2], int *pic_poc);
4baba6c8
YN
1035int ff_pred_weight_table(H264Context *h);
1036int ff_set_ref_count(H264Context *h);
2c541554 1037
f51d0f39
LB
1038int ff_h264_decode_slice_header(H264Context *h, H264Context *h0);
1039int ff_h264_execute_decode_slices(H264Context *h, unsigned context_count);
1040int ff_h264_update_thread_context(AVCodecContext *dst,
1041 const AVCodecContext *src);
1042
1043void ff_h264_flush_change(H264Context *h);
1044
1045void ff_h264_free_tables(H264Context *h, int free_rbsp);
1046
98790382 1047#endif /* AVCODEC_H264_H */