/* * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file h264.h * H.264 / AVC / MPEG4 part10 codec. * @author Michael Niedermayer <michaelni@gmx.at> */ #ifndef FFMPEG_H264_H #define FFMPEG_H264_H #include "dsputil.h" #include "cabac.h" #include "mpegvideo.h" #include "h264pred.h" #define interlaced_dct interlaced_dct_is_a_bad_name #define mb_intra mb_intra_is_not_initialized_see_mb_type #define LUMA_DC_BLOCK_INDEX 25 #define CHROMA_DC_BLOCK_INDEX 26 #define CHROMA_DC_COEFF_TOKEN_VLC_BITS 8 #define COEFF_TOKEN_VLC_BITS 8 #define TOTAL_ZEROS_VLC_BITS 9 #define CHROMA_DC_TOTAL_ZEROS_VLC_BITS 3 #define RUN_VLC_BITS 3 #define RUN7_VLC_BITS 6 #define MAX_SPS_COUNT 32 #define MAX_PPS_COUNT 256 #define MAX_MMCO_COUNT 66 /* Compiling in interlaced support reduces the speed * of progressive decoding by about 2%. */ #define ALLOW_INTERLACE #ifdef ALLOW_INTERLACE #define MB_MBAFF h->mb_mbaff #define MB_FIELD h->mb_field_decoding_flag #define FRAME_MBAFF h->mb_aff_frame #define FIELD_PICTURE (s->picture_structure != PICT_FRAME) #else #define MB_MBAFF 0 #define MB_FIELD 0 #define FRAME_MBAFF 0 #define FIELD_PICTURE 0 #undef IS_INTERLACED #define IS_INTERLACED(mb_type) 0 #endif #define FIELD_OR_MBAFF_PICTURE (FRAME_MBAFF || FIELD_PICTURE) /** * Sequence parameter set */ typedef struct SPS{ int profile_idc; int level_idc; int transform_bypass; ///< qpprime_y_zero_transform_bypass_flag int log2_max_frame_num; ///< log2_max_frame_num_minus4 + 4 int poc_type; ///< pic_order_cnt_type int log2_max_poc_lsb; ///< log2_max_pic_order_cnt_lsb_minus4 int delta_pic_order_always_zero_flag; int offset_for_non_ref_pic; int offset_for_top_to_bottom_field; int poc_cycle_length; ///< num_ref_frames_in_pic_order_cnt_cycle int ref_frame_count; ///< num_ref_frames int gaps_in_frame_num_allowed_flag; int mb_width; ///< pic_width_in_mbs_minus1 + 1 int mb_height; ///< pic_height_in_map_units_minus1 + 1 int frame_mbs_only_flag; int mb_aff; ///<mb_adaptive_frame_field_flag int direct_8x8_inference_flag; int crop; ///< frame_cropping_flag int crop_left; ///< frame_cropping_rect_left_offset int crop_right; ///< frame_cropping_rect_right_offset int crop_top; ///< frame_cropping_rect_top_offset int crop_bottom; ///< frame_cropping_rect_bottom_offset int vui_parameters_present_flag; AVRational sar; int timing_info_present_flag; uint32_t num_units_in_tick; uint32_t time_scale; int fixed_frame_rate_flag; short offset_for_ref_frame[256]; //FIXME dyn aloc? int bitstream_restriction_flag; int num_reorder_frames; int scaling_matrix_present; uint8_t scaling_matrix4[6][16]; uint8_t scaling_matrix8[2][64]; }SPS; /** * Picture parameter set */ typedef struct PPS{ unsigned int sps_id; int cabac; ///< entropy_coding_mode_flag int pic_order_present; ///< pic_order_present_flag int slice_group_count; ///< num_slice_groups_minus1 + 1 int mb_slice_group_map_type; unsigned int ref_count[2]; ///< num_ref_idx_l0/1_active_minus1 + 1 int weighted_pred; ///< weighted_pred_flag int weighted_bipred_idc; int init_qp; ///< pic_init_qp_minus26 + 26 int init_qs; ///< pic_init_qs_minus26 + 26 int chroma_qp_index_offset[2]; int deblocking_filter_parameters_present; ///< deblocking_filter_parameters_present_flag int constrained_intra_pred; ///< constrained_intra_pred_flag int redundant_pic_cnt_present; ///< redundant_pic_cnt_present_flag int transform_8x8_mode; ///< transform_8x8_mode_flag uint8_t scaling_matrix4[6][16]; uint8_t scaling_matrix8[2][64]; uint8_t chroma_qp_table[2][256]; ///< pre-scaled (with chroma_qp_index_offset) version of qp_table int chroma_qp_diff; }PPS; /** * Memory management control operation opcode. */ typedef enum MMCOOpcode{ MMCO_END=0, MMCO_SHORT2UNUSED, MMCO_LONG2UNUSED, MMCO_SHORT2LONG, MMCO_SET_MAX_LONG, MMCO_RESET, MMCO_LONG, } MMCOOpcode; /** * Memory management control operation. */ typedef struct MMCO{ MMCOOpcode opcode; int short_pic_num; ///< pic_num without wrapping (pic_num & max_pic_num) int long_arg; ///< index, pic_num, or num long refs depending on opcode } MMCO; /** * H264Context */ typedef struct H264Context{ MpegEncContext s; int nal_ref_idc; int nal_unit_type; uint8_t *rbsp_buffer[2]; unsigned int rbsp_buffer_size[2]; /** * Used to parse AVC variant of h264 */ int is_avc; ///< this flag is != 0 if codec is avc1 int got_avcC; ///< flag used to parse avcC data only once int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4) int chroma_qp[2]; //QPc int prev_mb_skipped; int next_mb_skipped; //prediction stuff int chroma_pred_mode; int intra16x16_pred_mode; int top_mb_xy; int left_mb_xy[2]; int8_t intra4x4_pred_mode_cache[5*8]; int8_t (*intra4x4_pred_mode)[8]; H264PredContext hpc; unsigned int topleft_samples_available; unsigned int top_samples_available; unsigned int topright_samples_available; unsigned int left_samples_available; uint8_t (*top_borders[2])[16+2*8]; uint8_t left_border[2*(17+2*9)]; /** * non zero coeff count cache. * is 64 if not available. */ DECLARE_ALIGNED_8(uint8_t, non_zero_count_cache[6*8]); uint8_t (*non_zero_count)[16]; /** * Motion vector cache. */ DECLARE_ALIGNED_8(int16_t, mv_cache[2][5*8][2]); DECLARE_ALIGNED_8(int8_t, ref_cache[2][5*8]); #define LIST_NOT_USED -1 //FIXME rename? #define PART_NOT_AVAILABLE -2 /** * is 1 if the specific list MV&references are set to 0,0,-2. */ int mv_cache_clean[2]; /** * number of neighbors (top and/or left) that used 8x8 dct */ int neighbor_transform_size; /** * block_offset[ 0..23] for frame macroblocks * block_offset[24..47] for field macroblocks */ int block_offset[2*(16+8)]; uint32_t *mb2b_xy; //FIXME are these 4 a good idea? uint32_t *mb2b8_xy; int b_stride; //FIXME use s->b4_stride int b8_stride; int mb_linesize; ///< may be equal to s->linesize or s->linesize*2, for mbaff int mb_uvlinesize; int emu_edge_width; int emu_edge_height; int halfpel_flag; int thirdpel_flag; int unknown_svq3_flag; int next_slice_index; SPS *sps_buffers[MAX_SPS_COUNT]; SPS sps; ///< current sps PPS *pps_buffers[MAX_PPS_COUNT]; /** * current pps */ PPS pps; //FIXME move to Picture perhaps? (->no) do we need that? uint32_t dequant4_buffer[6][52][16]; uint32_t dequant8_buffer[2][52][64]; uint32_t (*dequant4_coeff[6])[16]; uint32_t (*dequant8_coeff[2])[64]; int dequant_coeff_pps; ///< reinit tables when pps changes int slice_num; uint8_t *slice_table_base; uint8_t *slice_table; ///< slice_table_base + 2*mb_stride + 1 int slice_type; int slice_type_fixed; //interlacing specific flags int mb_aff_frame; int mb_field_decoding_flag; int mb_mbaff; ///< mb_aff_frame && mb_field_decoding_flag unsigned int sub_mb_type[4]; //POC stuff int poc_lsb; int poc_msb; int delta_poc_bottom; int delta_poc[2]; int frame_num; int prev_poc_msb; ///< poc_msb of the last reference pic for POC type 0 int prev_poc_lsb; ///< poc_lsb of the last reference pic for POC type 0 int frame_num_offset; ///< for POC type 2 int prev_frame_num_offset; ///< for POC type 2 int prev_frame_num; ///< frame_num of the last pic for POC type 1/2 /** * frame_num for frames or 2*frame_num+1 for field pics. */ int curr_pic_num; /** * max_frame_num or 2*max_frame_num for field pics. */ int max_pic_num; //Weighted pred stuff int use_weight; int use_weight_chroma; int luma_log2_weight_denom; int chroma_log2_weight_denom; int luma_weight[2][48]; int luma_offset[2][48]; int chroma_weight[2][48][2]; int chroma_offset[2][48][2]; int implicit_weight[48][48]; //deblock int deblocking_filter; ///< disable_deblocking_filter_idc with 1<->0 int slice_alpha_c0_offset; int slice_beta_offset; int redundant_pic_count; int direct_spatial_mv_pred; int dist_scale_factor[16]; int dist_scale_factor_field[32]; int map_col_to_list0[2][16]; int map_col_to_list0_field[2][32]; /** * num_ref_idx_l0/1_active_minus1 + 1 */ unsigned int ref_count[2]; ///< counts frames or fields, depending on current mb mode unsigned int list_count; Picture *short_ref[32]; Picture *long_ref[32]; Picture default_ref_list[2][32]; ///< base reference list for all slices of a coded picture Picture ref_list[2][48]; /**< 0..15: frame refs, 16..47: mbaff field refs. Reordered version of default_ref_list according to picture reordering in slice header */ Picture *delayed_pic[18]; //FIXME size? Picture *delayed_output_pic; /** * memory management control operations buffer. */ MMCO mmco[MAX_MMCO_COUNT]; int mmco_index; int long_ref_count; ///< number of actual long term references int short_ref_count; ///< number of actual short term references //data partitioning GetBitContext intra_gb; GetBitContext inter_gb; GetBitContext *intra_gb_ptr; GetBitContext *inter_gb_ptr; DECLARE_ALIGNED_8(DCTELEM, mb[16*24]); DCTELEM mb_padding[256]; ///< as mb is addressed by scantable[i] and scantable is uint8_t we can either check that i is not to large or ensure that there is some unused stuff after mb /** * Cabac */ CABACContext cabac; uint8_t cabac_state[460]; int cabac_init_idc; /* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0,1,2), 0x0? luma_cbp */ uint16_t *cbp_table; int cbp; int top_cbp; int left_cbp; /* chroma_pred_mode for i4x4 or i16x16, else 0 */ uint8_t *chroma_pred_mode_table; int last_qscale_diff; int16_t (*mvd_table[2])[2]; DECLARE_ALIGNED_8(int16_t, mvd_cache[2][5*8][2]); uint8_t *direct_table; uint8_t direct_cache[5*8]; uint8_t zigzag_scan[16]; uint8_t zigzag_scan8x8[64]; uint8_t zigzag_scan8x8_cavlc[64]; uint8_t field_scan[16]; uint8_t field_scan8x8[64]; uint8_t field_scan8x8_cavlc[64]; const uint8_t *zigzag_scan_q0; const uint8_t *zigzag_scan8x8_q0; const uint8_t *zigzag_scan8x8_cavlc_q0; const uint8_t *field_scan_q0; const uint8_t *field_scan8x8_q0; const uint8_t *field_scan8x8_cavlc_q0; int x264_build; /** * @defgroup multithreading Members for slice based multithreading * @{ */ struct H264Context *thread_context[MAX_THREADS]; /** * current slice number, used to initalize slice_num of each thread/context */ int current_slice; /** * Max number of threads / contexts. * This is equal to AVCodecContext.thread_count unless * multithreaded decoding is impossible, in which case it is * reduced to 1. */ int max_contexts; /** * 1 if the single thread fallback warning has already been * displayed, 0 otherwise. */ int single_decode_warning; int last_slice_type; /** @} */ }H264Context; #endif /* FFMPEG_H264_H */