2 * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
3 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
5 * This file is part of FFmpeg.
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.
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.
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
24 * H.264 / AVC / MPEG4 part10 codec.
25 * @author Michael Niedermayer <michaelni@gmx.at>
28 #ifndef AVCODEC_H264_H
29 #define AVCODEC_H264_H
31 #include "libavutil/intreadwrite.h"
34 #include "mpegvideo.h"
37 #include "rectangle.h"
39 #define interlaced_dct interlaced_dct_is_a_bad_name
40 #define mb_intra mb_intra_is_not_initialized_see_mb_type
42 #define MAX_SPS_COUNT 32
43 #define MAX_PPS_COUNT 256
45 #define MAX_MMCO_COUNT 66
47 #define MAX_DELAYED_PIC_COUNT 16
49 #define MAX_MBPAIR_SIZE (256*1024) // a tighter bound could be calculated if someone cares about a few bytes
51 /* Compiling in interlaced support reduces the speed
52 * of progressive decoding by about 2%. */
53 #define ALLOW_INTERLACE
58 * The maximum number of slices supported by the decoder.
59 * must be a power of 2
63 #ifdef ALLOW_INTERLACE
64 #define MB_MBAFF h->mb_mbaff
65 #define MB_FIELD h->mb_field_decoding_flag
66 #define FRAME_MBAFF h->mb_aff_frame
67 #define FIELD_PICTURE (s->picture_structure != PICT_FRAME)
76 #define FIELD_PICTURE 0
78 #define IS_INTERLACED(mb_type) 0
84 #define FIELD_OR_MBAFF_PICTURE (FRAME_MBAFF || FIELD_PICTURE)
87 #define CABAC h->pps.cabac
90 #define CHROMA (h->sps.chroma_format_idc)
91 #define CHROMA422 (h->sps.chroma_format_idc == 2)
92 #define CHROMA444 (h->sps.chroma_format_idc == 3)
94 #define EXTENDED_SAR 255
96 #define MB_TYPE_REF0 MB_TYPE_ACPRED // dirty but it fits in 16 bit
97 #define MB_TYPE_8x8DCT 0x01000000
98 #define IS_REF0(a) ((a) & MB_TYPE_REF0)
99 #define IS_8x8DCT(a) ((a) & MB_TYPE_8x8DCT)
102 * Value of Picture.reference when Picture is not a reference picture, but
103 * is held for delayed output.
105 #define DELAYED_PIC_REF 4
107 #define QP_MAX_NUM (51 + 4*6) // The maximum supported qp
124 NAL_AUXILIARY_SLICE = 19
131 SEI_BUFFERING_PERIOD = 0, ///< buffering period (H.264, D.1.1)
132 SEI_TYPE_PIC_TIMING = 1, ///< picture timing
133 SEI_TYPE_USER_DATA_UNREGISTERED = 5, ///< unregistered user data
134 SEI_TYPE_RECOVERY_POINT = 6 ///< recovery point (frame # to decoder sync)
138 * pic_struct in picture timing SEI message
141 SEI_PIC_STRUCT_FRAME = 0, ///< 0: %frame
142 SEI_PIC_STRUCT_TOP_FIELD = 1, ///< 1: top field
143 SEI_PIC_STRUCT_BOTTOM_FIELD = 2, ///< 2: bottom field
144 SEI_PIC_STRUCT_TOP_BOTTOM = 3, ///< 3: top field, bottom field, in that order
145 SEI_PIC_STRUCT_BOTTOM_TOP = 4, ///< 4: bottom field, top field, in that order
146 SEI_PIC_STRUCT_TOP_BOTTOM_TOP = 5, ///< 5: top field, bottom field, top field repeated, in that order
147 SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM = 6, ///< 6: bottom field, top field, bottom field repeated, in that order
148 SEI_PIC_STRUCT_FRAME_DOUBLING = 7, ///< 7: %frame doubling
149 SEI_PIC_STRUCT_FRAME_TRIPLING = 8 ///< 8: %frame tripling
153 * Sequence parameter set
158 int chroma_format_idc;
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;
169 int mb_width; ///< pic_width_in_mbs_minus1 + 1
170 int mb_height; ///< pic_height_in_map_units_minus1 + 1
171 int frame_mbs_only_flag;
172 int mb_aff; ///< mb_adaptive_frame_field_flag
173 int direct_8x8_inference_flag;
174 int crop; ///< frame_cropping_flag
175 unsigned int crop_left; ///< frame_cropping_rect_left_offset
176 unsigned int crop_right; ///< frame_cropping_rect_right_offset
177 unsigned int crop_top; ///< frame_cropping_rect_top_offset
178 unsigned int crop_bottom; ///< frame_cropping_rect_bottom_offset
179 int vui_parameters_present_flag;
181 int video_signal_type_present_flag;
183 int colour_description_present_flag;
184 enum AVColorPrimaries color_primaries;
185 enum AVColorTransferCharacteristic color_trc;
186 enum AVColorSpace colorspace;
187 int timing_info_present_flag;
188 uint32_t num_units_in_tick;
190 int fixed_frame_rate_flag;
191 short offset_for_ref_frame[256]; // FIXME dyn aloc?
192 int bitstream_restriction_flag;
193 int num_reorder_frames;
194 int scaling_matrix_present;
195 uint8_t scaling_matrix4[6][16];
196 uint8_t scaling_matrix8[6][64];
197 int nal_hrd_parameters_present_flag;
198 int vcl_hrd_parameters_present_flag;
199 int pic_struct_present_flag;
200 int time_offset_length;
201 int cpb_cnt; ///< See H.264 E.1.2
202 int initial_cpb_removal_delay_length; ///< initial_cpb_removal_delay_length_minus1 + 1
203 int cpb_removal_delay_length; ///< cpb_removal_delay_length_minus1 + 1
204 int dpb_output_delay_length; ///< dpb_output_delay_length_minus1 + 1
205 int bit_depth_luma; ///< bit_depth_luma_minus8 + 8
206 int bit_depth_chroma; ///< bit_depth_chroma_minus8 + 8
207 int residual_color_transform_flag; ///< residual_colour_transform_flag
208 int constraint_set_flags; ///< constraint_set[0-3]_flag
212 * Picture parameter set
216 int cabac; ///< entropy_coding_mode_flag
217 int pic_order_present; ///< pic_order_present_flag
218 int slice_group_count; ///< num_slice_groups_minus1 + 1
219 int mb_slice_group_map_type;
220 unsigned int ref_count[2]; ///< num_ref_idx_l0/1_active_minus1 + 1
221 int weighted_pred; ///< weighted_pred_flag
222 int weighted_bipred_idc;
223 int init_qp; ///< pic_init_qp_minus26 + 26
224 int init_qs; ///< pic_init_qs_minus26 + 26
225 int chroma_qp_index_offset[2];
226 int deblocking_filter_parameters_present; ///< deblocking_filter_parameters_present_flag
227 int constrained_intra_pred; ///< constrained_intra_pred_flag
228 int redundant_pic_cnt_present; ///< redundant_pic_cnt_present_flag
229 int transform_8x8_mode; ///< transform_8x8_mode_flag
230 uint8_t scaling_matrix4[6][16];
231 uint8_t scaling_matrix8[6][64];
232 uint8_t chroma_qp_table[2][QP_MAX_NUM+1]; ///< pre-scaled (with chroma_qp_index_offset) version of qp_table
237 * Memory management control operation opcode.
239 typedef enum MMCOOpcode {
250 * Memory management control operation.
252 typedef struct MMCO {
254 int short_pic_num; ///< pic_num without wrapping (pic_num & max_pic_num)
255 int long_arg; ///< index, pic_num, or num long refs depending on opcode
261 typedef struct H264Context {
263 H264DSPContext h264dsp;
264 int pixel_shift; ///< 0 for 8-bit H264, 1 for high-bit-depth H264
265 int chroma_qp[2]; // QPc
267 int qp_thresh; ///< QP threshold to skip loopfilter
273 int chroma_pred_mode;
274 int intra16x16_pred_mode;
279 int left_mb_xy[LEFT_MBS];
284 int left_type[LEFT_MBS];
286 const uint8_t *left_block;
287 int topleft_partition;
289 int8_t intra4x4_pred_mode_cache[5 * 8];
290 int8_t(*intra4x4_pred_mode);
292 unsigned int topleft_samples_available;
293 unsigned int top_samples_available;
294 unsigned int topright_samples_available;
295 unsigned int left_samples_available;
296 uint8_t (*top_borders[2])[(16 * 3) * 2];
299 * non zero coeff count cache.
300 * is 64 if not available.
302 DECLARE_ALIGNED(8, uint8_t, non_zero_count_cache)[15 * 8];
304 uint8_t (*non_zero_count)[48];
307 * Motion vector cache.
309 DECLARE_ALIGNED(16, int16_t, mv_cache)[2][5 * 8][2];
310 DECLARE_ALIGNED(8, int8_t, ref_cache)[2][5 * 8];
311 #define LIST_NOT_USED -1 // FIXME rename?
312 #define PART_NOT_AVAILABLE -2
315 * number of neighbors (top and/or left) that used 8x8 dct
317 int neighbor_transform_size;
320 * block_offset[ 0..23] for frame macroblocks
321 * block_offset[24..47] for field macroblocks
323 int block_offset[2 * (16 * 3)];
325 uint32_t *mb2b_xy; // FIXME are these 4 a good idea?
327 int b_stride; // FIXME use s->b4_stride
329 int mb_linesize; ///< may be equal to s->linesize or s->linesize * 2, for mbaff
335 SPS sps; ///< current sps
340 PPS pps; // FIXME move to Picture perhaps? (->no) do we need that?
342 uint32_t dequant4_buffer[6][QP_MAX_NUM + 1][16]; // FIXME should these be moved down?
343 uint32_t dequant8_buffer[6][QP_MAX_NUM + 1][64];
344 uint32_t(*dequant4_coeff[6])[16];
345 uint32_t(*dequant8_coeff[6])[64];
348 uint16_t *slice_table; ///< slice_table_base + 2*mb_stride + 1
350 int slice_type_nos; ///< S free slice type (SI/SP are remapped to I/P)
351 int slice_type_fixed;
353 // interlacing specific flags
355 int mb_field_decoding_flag;
356 int mb_mbaff; ///< mb_aff_frame && mb_field_decoding_flag
358 DECLARE_ALIGNED(8, uint16_t, sub_mb_type)[4];
360 // Weighted pred stuff
362 int use_weight_chroma;
363 int luma_log2_weight_denom;
364 int chroma_log2_weight_denom;
365 // The following 2 can be changed to int8_t but that causes 10cpu cycles speedloss
366 int luma_weight[48][2][2];
367 int chroma_weight[48][2][2][2];
368 int implicit_weight[48][48][2];
370 int direct_spatial_mv_pred;
373 int dist_scale_factor[16];
374 int dist_scale_factor_field[2][32];
375 int map_col_to_list0[2][16 + 32];
376 int map_col_to_list0_field[2][2][16 + 32];
379 * num_ref_idx_l0/1_active_minus1 + 1
381 unsigned int ref_count[2]; ///< counts frames or fields, depending on current mb mode
382 unsigned int list_count;
383 uint8_t *list_counts; ///< Array of list_count per MB specifying the slice type
384 Picture ref_list[2][48]; /**< 0..15: frame refs, 16..47: mbaff field refs.
385 * Reordered version of default_ref_list
386 * according to picture reordering in slice header */
387 int ref2frm[MAX_SLICES][2][64]; ///< reference to frame number lists, used in the loop filter, the first 2 are for -2,-1
390 GetBitContext intra_gb;
391 GetBitContext inter_gb;
392 GetBitContext *intra_gb_ptr;
393 GetBitContext *inter_gb_ptr;
395 DECLARE_ALIGNED(16, DCTELEM, mb)[16 * 48 * 2]; ///< as a dct coeffecient is int32_t in high depth, we need to reserve twice the space.
396 DECLARE_ALIGNED(16, DCTELEM, mb_luma_dc)[3][16 * 2];
397 DCTELEM 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
403 uint8_t cabac_state[1024];
405 /* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0, 1, 2), 0x0? luma_cbp */
410 /* chroma_pred_mode for i4x4 or i16x16, else 0 */
411 uint8_t *chroma_pred_mode_table;
412 int last_qscale_diff;
413 uint8_t (*mvd_table[2])[2];
414 DECLARE_ALIGNED(16, uint8_t, mvd_cache)[2][5 * 8][2];
415 uint8_t *direct_table;
416 uint8_t direct_cache[5 * 8];
418 uint8_t zigzag_scan[16];
419 uint8_t zigzag_scan8x8[64];
420 uint8_t zigzag_scan8x8_cavlc[64];
421 uint8_t field_scan[16];
422 uint8_t field_scan8x8[64];
423 uint8_t field_scan8x8_cavlc[64];
424 const uint8_t *zigzag_scan_q0;
425 const uint8_t *zigzag_scan8x8_q0;
426 const uint8_t *zigzag_scan8x8_cavlc_q0;
427 const uint8_t *field_scan_q0;
428 const uint8_t *field_scan8x8_q0;
429 const uint8_t *field_scan8x8_cavlc_q0;
438 int deblocking_filter; ///< disable_deblocking_filter_idc with 1 <-> 0
439 int slice_alpha_c0_offset;
440 int slice_beta_offset;
442 // =============================================================
443 // Things below are not used in the MB or more inner code
447 uint8_t *rbsp_buffer[2];
448 unsigned int rbsp_buffer_size[2];
451 * Used to parse AVC variant of h264
453 int is_avc; ///< this flag is != 0 if codec is avc1
454 int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)
455 int got_first; ///< this flag is != 0 if we've parsed a frame
457 SPS *sps_buffers[MAX_SPS_COUNT];
458 PPS *pps_buffers[MAX_PPS_COUNT];
460 int dequant_coeff_pps; ///< reinit tables when pps changes
462 uint16_t *slice_table_base;
467 int delta_poc_bottom;
470 int prev_poc_msb; ///< poc_msb of the last reference pic for POC type 0
471 int prev_poc_lsb; ///< poc_lsb of the last reference pic for POC type 0
472 int frame_num_offset; ///< for POC type 2
473 int prev_frame_num_offset; ///< for POC type 2
474 int prev_frame_num; ///< frame_num of the last pic for POC type 1/2
477 * frame_num for frames or 2 * frame_num + 1 for field pics.
482 * max_frame_num or 2 * max_frame_num for field pics.
486 int redundant_pic_count;
488 Picture *short_ref[32];
489 Picture *long_ref[32];
490 Picture default_ref_list[2][32]; ///< base reference list for all slices of a coded picture
491 Picture *delayed_pic[MAX_DELAYED_PIC_COUNT + 2]; // FIXME size?
492 int last_pocs[MAX_DELAYED_PIC_COUNT];
493 Picture *next_output_pic;
495 int next_outputed_poc;
498 * memory management control operations buffer.
500 MMCO mmco[MAX_MMCO_COUNT];
504 int long_ref_count; ///< number of actual long term references
505 int short_ref_count; ///< number of actual short term references
510 * @name Members for slice based multithreading
513 struct H264Context *thread_context[MAX_THREADS];
516 * current slice number, used to initalize slice_num of each thread/context
521 * Max number of threads / contexts.
522 * This is equal to AVCodecContext.thread_count unless
523 * multithreaded decoding is impossible, in which case it is
529 * 1 if the single thread fallback warning has already been
530 * displayed, 0 otherwise.
532 int single_decode_warning;
538 * pic_struct in picture timing SEI message
540 SEI_PicStructType sei_pic_struct;
543 * Complement sei_pic_struct
544 * SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced frames.
545 * However, soft telecined frames may have these values.
546 * This is used in an attempt to flag soft telecine progressive.
548 int prev_interlaced_frame;
551 * Bit set of clock types for fields/frames in picture timing SEI message.
552 * For each found ct_type, appropriate bit is set (e.g., bit 1 for
558 * dpb_output_delay in picture timing SEI message, see H.264 C.2.2
560 int sei_dpb_output_delay;
563 * cpb_removal_delay in picture timing SEI message, see H.264 C.1.2
565 int sei_cpb_removal_delay;
568 * recovery_frame_cnt from SEI message
570 * Set to -1 if no recovery point SEI message found or to number of frames
571 * before playback synchronizes. Frames having recovery point are key
574 int sei_recovery_frame_cnt;
576 * recovery_frame is the frame_num at which the next frame should
577 * be fully constructed.
579 * Set to -1 when not expecting a recovery point.
583 int luma_weight_flag[2]; ///< 7.4.3.2 luma_weight_lX_flag
584 int chroma_weight_flag[2]; ///< 7.4.3.2 chroma_weight_lX_flag
587 int sei_buffering_period_present; ///< Buffering period SEI flag
588 int initial_cpb_removal_delay[32]; ///< Initial timestamps for CPBs
590 int cur_chroma_format_idc;
592 int16_t slice_row[MAX_SLICES]; ///< to detect when MAX_SLICES is too low
594 int sync; ///< did we had a keyframe or recovery point
596 uint8_t parse_history[4];
597 int parse_history_count;
601 extern const uint8_t ff_h264_chroma_qp[5][QP_MAX_NUM + 1]; ///< One chroma qp table for each possible bit depth (8-12).
602 extern const uint16_t ff_h264_mb_sizes[4];
607 int ff_h264_decode_sei(H264Context *h);
612 int ff_h264_decode_seq_parameter_set(H264Context *h);
615 * compute profile from sps
617 int ff_h264_get_profile(SPS *sps);
622 int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length);
625 * Decode a network abstraction layer unit.
626 * @param consumed is the number of bytes used as input
627 * @param length is the length of the array
628 * @param dst_length is the number of decoded bytes FIXME here
629 * or a decode rbsp tailing?
630 * @return decoded bytes, might be src+1 if no escapes
632 const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src,
633 int *dst_length, int *consumed, int length);
636 * Free any data that may have been allocated in the H264 context
639 av_cold void ff_h264_free_context(H264Context *h);
642 * Reconstruct bitstream slice_type.
644 int ff_h264_get_slice_type(const H264Context *h);
650 int ff_h264_alloc_tables(H264Context *h);
653 * Fill the default_ref_list.
655 int ff_h264_fill_default_ref_list(H264Context *h);
657 int ff_h264_decode_ref_pic_list_reordering(H264Context *h);
658 void ff_h264_fill_mbaff_ref_list(H264Context *h);
659 void ff_h264_remove_all_refs(H264Context *h);
662 * Execute the reference picture marking (memory management control operations).
664 int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count);
666 int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb);
668 void ff_generate_sliding_window_mmcos(H264Context *h);
671 * Check if the top & left blocks are available if needed & change the
672 * dc mode so it only uses the available blocks.
674 int ff_h264_check_intra4x4_pred_mode(H264Context *h);
677 * Check if the top & left blocks are available if needed & change the
678 * dc mode so it only uses the available blocks.
680 int ff_h264_check_intra_pred_mode(H264Context *h, int mode, int is_chroma);
682 void ff_h264_hl_decode_mb(H264Context *h);
683 int ff_h264_frame_start(H264Context *h);
684 int ff_h264_decode_extradata(H264Context *h, const uint8_t *buf, int size);
685 av_cold int ff_h264_decode_init(AVCodecContext *avctx);
686 av_cold void ff_h264_decode_init_vlc(void);
689 * Decode a macroblock
690 * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error
692 int ff_h264_decode_mb_cavlc(H264Context *h);
695 * Decode a CABAC coded macroblock
696 * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error
698 int ff_h264_decode_mb_cabac(H264Context *h);
700 void ff_h264_init_cabac_states(H264Context *h);
702 void ff_h264_direct_dist_scale_factor(H264Context *const h);
703 void ff_h264_direct_ref_list_init(H264Context *const h);
704 void ff_h264_pred_direct_motion(H264Context *const h, int *mb_type);
706 void ff_h264_filter_mb_fast(H264Context *h, int mb_x, int mb_y,
707 uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr,
708 unsigned int linesize, unsigned int uvlinesize);
709 void ff_h264_filter_mb(H264Context *h, int mb_x, int mb_y,
710 uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr,
711 unsigned int linesize, unsigned int uvlinesize);
714 * Reset SEI values at the beginning of the frame.
716 * @param h H.264 context.
718 void ff_h264_reset_sei(H264Context *h);
730 /* Scan8 organization:
747 * DY/DU/DV are for luma/chroma DC.
750 #define LUMA_DC_BLOCK_INDEX 48
751 #define CHROMA_DC_BLOCK_INDEX 49
753 // This table must be here because scan8[constant] must be known at compiletime
754 static const uint8_t scan8[16 * 3 + 3] = {
755 4 + 1 * 8, 5 + 1 * 8, 4 + 2 * 8, 5 + 2 * 8,
756 6 + 1 * 8, 7 + 1 * 8, 6 + 2 * 8, 7 + 2 * 8,
757 4 + 3 * 8, 5 + 3 * 8, 4 + 4 * 8, 5 + 4 * 8,
758 6 + 3 * 8, 7 + 3 * 8, 6 + 4 * 8, 7 + 4 * 8,
759 4 + 6 * 8, 5 + 6 * 8, 4 + 7 * 8, 5 + 7 * 8,
760 6 + 6 * 8, 7 + 6 * 8, 6 + 7 * 8, 7 + 7 * 8,
761 4 + 8 * 8, 5 + 8 * 8, 4 + 9 * 8, 5 + 9 * 8,
762 6 + 8 * 8, 7 + 8 * 8, 6 + 9 * 8, 7 + 9 * 8,
763 4 + 11 * 8, 5 + 11 * 8, 4 + 12 * 8, 5 + 12 * 8,
764 6 + 11 * 8, 7 + 11 * 8, 6 + 12 * 8, 7 + 12 * 8,
765 4 + 13 * 8, 5 + 13 * 8, 4 + 14 * 8, 5 + 14 * 8,
766 6 + 13 * 8, 7 + 13 * 8, 6 + 14 * 8, 7 + 14 * 8,
767 0 + 0 * 8, 0 + 5 * 8, 0 + 10 * 8
770 static av_always_inline uint32_t pack16to32(int a, int b)
773 return (b & 0xFFFF) + (a << 16);
775 return (a & 0xFFFF) + (b << 16);
779 static av_always_inline uint16_t pack8to16(int a, int b)
782 return (b & 0xFF) + (a << 8);
784 return (a & 0xFF) + (b << 8);
791 static av_always_inline int get_chroma_qp(H264Context *h, int t, int qscale)
793 return h->pps.chroma_qp_table[t][qscale];
797 * Get the predicted intra4x4 prediction mode.
799 static av_always_inline int pred_intra_mode(H264Context *h, int n)
801 const int index8 = scan8[n];
802 const int left = h->intra4x4_pred_mode_cache[index8 - 1];
803 const int top = h->intra4x4_pred_mode_cache[index8 - 8];
804 const int min = FFMIN(left, top);
806 tprintf(h->s.avctx, "mode:%d %d min:%d\n", left, top, min);
814 static av_always_inline void write_back_intra_pred_mode(H264Context *h)
816 int8_t *i4x4 = h->intra4x4_pred_mode + h->mb2br_xy[h->mb_xy];
817 int8_t *i4x4_cache = h->intra4x4_pred_mode_cache;
819 AV_COPY32(i4x4, i4x4_cache + 4 + 8 * 4);
820 i4x4[4] = i4x4_cache[7 + 8 * 3];
821 i4x4[5] = i4x4_cache[7 + 8 * 2];
822 i4x4[6] = i4x4_cache[7 + 8 * 1];
825 static av_always_inline void write_back_non_zero_count(H264Context *h)
827 const int mb_xy = h->mb_xy;
828 uint8_t *nnz = h->non_zero_count[mb_xy];
829 uint8_t *nnz_cache = h->non_zero_count_cache;
831 AV_COPY32(&nnz[ 0], &nnz_cache[4 + 8 * 1]);
832 AV_COPY32(&nnz[ 4], &nnz_cache[4 + 8 * 2]);
833 AV_COPY32(&nnz[ 8], &nnz_cache[4 + 8 * 3]);
834 AV_COPY32(&nnz[12], &nnz_cache[4 + 8 * 4]);
835 AV_COPY32(&nnz[16], &nnz_cache[4 + 8 * 6]);
836 AV_COPY32(&nnz[20], &nnz_cache[4 + 8 * 7]);
837 AV_COPY32(&nnz[32], &nnz_cache[4 + 8 * 11]);
838 AV_COPY32(&nnz[36], &nnz_cache[4 + 8 * 12]);
840 if (!h->s.chroma_y_shift) {
841 AV_COPY32(&nnz[24], &nnz_cache[4 + 8 * 8]);
842 AV_COPY32(&nnz[28], &nnz_cache[4 + 8 * 9]);
843 AV_COPY32(&nnz[40], &nnz_cache[4 + 8 * 13]);
844 AV_COPY32(&nnz[44], &nnz_cache[4 + 8 * 14]);
848 static av_always_inline void write_back_motion_list(H264Context *h,
849 MpegEncContext *const s,
852 int mb_type, int list)
854 int16_t(*mv_dst)[2] = &s->current_picture.f.motion_val[list][b_xy];
855 int16_t(*mv_src)[2] = &h->mv_cache[list][scan8[0]];
856 AV_COPY128(mv_dst + 0 * b_stride, mv_src + 8 * 0);
857 AV_COPY128(mv_dst + 1 * b_stride, mv_src + 8 * 1);
858 AV_COPY128(mv_dst + 2 * b_stride, mv_src + 8 * 2);
859 AV_COPY128(mv_dst + 3 * b_stride, mv_src + 8 * 3);
861 uint8_t (*mvd_dst)[2] = &h->mvd_table[list][FMO ? 8 * h->mb_xy
862 : h->mb2br_xy[h->mb_xy]];
863 uint8_t(*mvd_src)[2] = &h->mvd_cache[list][scan8[0]];
864 if (IS_SKIP(mb_type)) {
867 AV_COPY64(mvd_dst, mvd_src + 8 * 3);
868 AV_COPY16(mvd_dst + 3 + 3, mvd_src + 3 + 8 * 0);
869 AV_COPY16(mvd_dst + 3 + 2, mvd_src + 3 + 8 * 1);
870 AV_COPY16(mvd_dst + 3 + 1, mvd_src + 3 + 8 * 2);
875 int8_t *ref_index = &s->current_picture.f.ref_index[list][b8_xy];
876 int8_t *ref_cache = h->ref_cache[list];
877 ref_index[0 + 0 * 2] = ref_cache[scan8[0]];
878 ref_index[1 + 0 * 2] = ref_cache[scan8[4]];
879 ref_index[0 + 1 * 2] = ref_cache[scan8[8]];
880 ref_index[1 + 1 * 2] = ref_cache[scan8[12]];
884 static av_always_inline void write_back_motion(H264Context *h, int mb_type)
886 MpegEncContext *const s = &h->s;
887 const int b_stride = h->b_stride;
888 const int b_xy = 4 * s->mb_x + 4 * s->mb_y * h->b_stride; // try mb2b(8)_xy
889 const int b8_xy = 4 * h->mb_xy;
891 if (USES_LIST(mb_type, 0)) {
892 write_back_motion_list(h, s, b_stride, b_xy, b8_xy, mb_type, 0);
894 fill_rectangle(&s->current_picture.f.ref_index[0][b8_xy],
895 2, 2, 2, (uint8_t)LIST_NOT_USED, 1);
897 if (USES_LIST(mb_type, 1))
898 write_back_motion_list(h, s, b_stride, b_xy, b8_xy, mb_type, 1);
900 if (h->slice_type_nos == AV_PICTURE_TYPE_B && CABAC) {
901 if (IS_8X8(mb_type)) {
902 uint8_t *direct_table = &h->direct_table[4 * h->mb_xy];
903 direct_table[1] = h->sub_mb_type[1] >> 1;
904 direct_table[2] = h->sub_mb_type[2] >> 1;
905 direct_table[3] = h->sub_mb_type[3] >> 1;
910 static av_always_inline int get_dct8x8_allowed(H264Context *h)
912 if (h->sps.direct_8x8_inference_flag)
913 return !(AV_RN64A(h->sub_mb_type) &
914 ((MB_TYPE_16x8 | MB_TYPE_8x16 | MB_TYPE_8x8) *
915 0x0001000100010001ULL));
917 return !(AV_RN64A(h->sub_mb_type) &
918 ((MB_TYPE_16x8 | MB_TYPE_8x16 | MB_TYPE_8x8 | MB_TYPE_DIRECT2) *
919 0x0001000100010001ULL));
922 #endif /* AVCODEC_H264_H */