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Diffstat (limited to 'ffmpeg/libavcodec/h264.h')
| -rw-r--r-- | ffmpeg/libavcodec/h264.h | 977 |
1 files changed, 977 insertions, 0 deletions
diff --git a/ffmpeg/libavcodec/h264.h b/ffmpeg/libavcodec/h264.h new file mode 100644 index 0000000..f20401d --- /dev/null +++ b/ffmpeg/libavcodec/h264.h @@ -0,0 +1,977 @@ +/* + * 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 + * H.264 / AVC / MPEG4 part10 codec. + * @author Michael Niedermayer <michaelni@gmx.at> + */ + +#ifndef AVCODEC_H264_H +#define AVCODEC_H264_H + +#include "libavutil/intreadwrite.h" +#include "cabac.h" +#include "error_resilience.h" +#include "get_bits.h" +#include "mpegvideo.h" +#include "h264chroma.h" +#include "h264dsp.h" +#include "h264pred.h" +#include "h264qpel.h" +#include "rectangle.h" + +#define MAX_SPS_COUNT 32 +#define MAX_PPS_COUNT 256 + +#define MAX_MMCO_COUNT 66 + +#define MAX_DELAYED_PIC_COUNT 16 + +#define MAX_MBPAIR_SIZE (256*1024) // a tighter bound could be calculated if someone cares about a few bytes + +/* Compiling in interlaced support reduces the speed + * of progressive decoding by about 2%. */ +#define ALLOW_INTERLACE + +#define FMO 0 + +/** + * The maximum number of slices supported by the decoder. + * must be a power of 2 + */ +#define MAX_SLICES 16 + +#ifdef ALLOW_INTERLACE +#define MB_MBAFF(h) h->mb_mbaff +#define MB_FIELD(h) h->mb_field_decoding_flag +#define FRAME_MBAFF(h) h->mb_aff_frame +#define FIELD_PICTURE(h) (h->picture_structure != PICT_FRAME) +#define LEFT_MBS 2 +#define LTOP 0 +#define LBOT 1 +#define LEFT(i) (i) +#else +#define MB_MBAFF(h) 0 +#define MB_FIELD(h) 0 +#define FRAME_MBAFF(h) 0 +#define FIELD_PICTURE(h) 0 +#undef IS_INTERLACED +#define IS_INTERLACED(mb_type) 0 +#define LEFT_MBS 1 +#define LTOP 0 +#define LBOT 0 +#define LEFT(i) 0 +#endif +#define FIELD_OR_MBAFF_PICTURE(h) (FRAME_MBAFF(h) || FIELD_PICTURE(h)) + +#ifndef CABAC +#define CABAC(h) h->pps.cabac +#endif + +#define CHROMA (h->sps.chroma_format_idc) +#define CHROMA422 (h->sps.chroma_format_idc == 2) +#define CHROMA444 (h->sps.chroma_format_idc == 3) + +#define EXTENDED_SAR 255 + +#define MB_TYPE_REF0 MB_TYPE_ACPRED // dirty but it fits in 16 bit +#define MB_TYPE_8x8DCT 0x01000000 +#define IS_REF0(a) ((a) & MB_TYPE_REF0) +#define IS_8x8DCT(a) ((a) & MB_TYPE_8x8DCT) + +#define QP_MAX_NUM (51 + 6*6) // The maximum supported qp + +/* NAL unit types */ +enum { + NAL_SLICE = 1, + NAL_DPA, + NAL_DPB, + NAL_DPC, + NAL_IDR_SLICE, + NAL_SEI, + NAL_SPS, + NAL_PPS, + NAL_AUD, + NAL_END_SEQUENCE, + NAL_END_STREAM, + NAL_FILLER_DATA, + NAL_SPS_EXT, + NAL_AUXILIARY_SLICE = 19, + NAL_FF_IGNORE = 0xff0f001, +}; + +/** + * SEI message types + */ +typedef enum { + SEI_BUFFERING_PERIOD = 0, ///< buffering period (H.264, D.1.1) + SEI_TYPE_PIC_TIMING = 1, ///< picture timing + SEI_TYPE_USER_DATA_ITU_T_T35 = 4, ///< user data registered by ITU-T Recommendation T.35 + SEI_TYPE_USER_DATA_UNREGISTERED = 5, ///< unregistered user data + SEI_TYPE_RECOVERY_POINT = 6 ///< recovery point (frame # to decoder sync) +} SEI_Type; + +/** + * pic_struct in picture timing SEI message + */ +typedef enum { + SEI_PIC_STRUCT_FRAME = 0, ///< 0: %frame + SEI_PIC_STRUCT_TOP_FIELD = 1, ///< 1: top field + SEI_PIC_STRUCT_BOTTOM_FIELD = 2, ///< 2: bottom field + SEI_PIC_STRUCT_TOP_BOTTOM = 3, ///< 3: top field, bottom field, in that order + SEI_PIC_STRUCT_BOTTOM_TOP = 4, ///< 4: bottom field, top field, in that order + SEI_PIC_STRUCT_TOP_BOTTOM_TOP = 5, ///< 5: top field, bottom field, top field repeated, in that order + SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM = 6, ///< 6: bottom field, top field, bottom field repeated, in that order + SEI_PIC_STRUCT_FRAME_DOUBLING = 7, ///< 7: %frame doubling + SEI_PIC_STRUCT_FRAME_TRIPLING = 8 ///< 8: %frame tripling +} SEI_PicStructType; + +/** + * Sequence parameter set + */ +typedef struct SPS { + int profile_idc; + int level_idc; + int chroma_format_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 + unsigned int crop_left; ///< frame_cropping_rect_left_offset + unsigned int crop_right; ///< frame_cropping_rect_right_offset + unsigned int crop_top; ///< frame_cropping_rect_top_offset + unsigned int crop_bottom; ///< frame_cropping_rect_bottom_offset + int vui_parameters_present_flag; + AVRational sar; + int video_signal_type_present_flag; + int full_range; + int colour_description_present_flag; + enum AVColorPrimaries color_primaries; + enum AVColorTransferCharacteristic color_trc; + enum AVColorSpace colorspace; + 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[6][64]; + int nal_hrd_parameters_present_flag; + int vcl_hrd_parameters_present_flag; + int pic_struct_present_flag; + int time_offset_length; + int cpb_cnt; ///< See H.264 E.1.2 + int initial_cpb_removal_delay_length; ///< initial_cpb_removal_delay_length_minus1 + 1 + int cpb_removal_delay_length; ///< cpb_removal_delay_length_minus1 + 1 + int dpb_output_delay_length; ///< dpb_output_delay_length_minus1 + 1 + int bit_depth_luma; ///< bit_depth_luma_minus8 + 8 + int bit_depth_chroma; ///< bit_depth_chroma_minus8 + 8 + int residual_color_transform_flag; ///< residual_colour_transform_flag + int constraint_set_flags; ///< constraint_set[0-3]_flag + int new; ///< flag to keep track if the decoder context needs re-init due to changed SPS +} 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[6][64]; + uint8_t chroma_qp_table[2][QP_MAX_NUM+1]; ///< 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 { + AVCodecContext *avctx; + VideoDSPContext vdsp; + H264DSPContext h264dsp; + H264ChromaContext h264chroma; + H264QpelContext h264qpel; + MotionEstContext me; + ParseContext parse_context; + GetBitContext gb; + DSPContext dsp; + ERContext er; + + Picture *DPB; + Picture *cur_pic_ptr; + Picture cur_pic; + + int pixel_shift; ///< 0 for 8-bit H264, 1 for high-bit-depth H264 + int chroma_qp[2]; // QPc + + int qp_thresh; ///< QP threshold to skip loopfilter + + int width, height; + int linesize, uvlinesize; + int chroma_x_shift, chroma_y_shift; + + int qscale; + int droppable; + int data_partitioning; + int coded_picture_number; + int low_delay; + + int context_initialized; + int flags; + int workaround_bugs; + + int prev_mb_skipped; + int next_mb_skipped; + + // prediction stuff + int chroma_pred_mode; + int intra16x16_pred_mode; + + int topleft_mb_xy; + int top_mb_xy; + int topright_mb_xy; + int left_mb_xy[LEFT_MBS]; + + int topleft_type; + int top_type; + int topright_type; + int left_type[LEFT_MBS]; + + const uint8_t *left_block; + int topleft_partition; + + int8_t intra4x4_pred_mode_cache[5 * 8]; + int8_t(*intra4x4_pred_mode); + 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 * 3) * 2]; + + /** + * non zero coeff count cache. + * is 64 if not available. + */ + DECLARE_ALIGNED(8, uint8_t, non_zero_count_cache)[15 * 8]; + + uint8_t (*non_zero_count)[48]; + + /** + * Motion vector cache. + */ + DECLARE_ALIGNED(16, 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 + + /** + * 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 * 3)]; + + uint32_t *mb2b_xy; // FIXME are these 4 a good idea? + uint32_t *mb2br_xy; + int b_stride; // FIXME use s->b4_stride + + int mb_linesize; ///< may be equal to s->linesize or s->linesize * 2, for mbaff + int mb_uvlinesize; + + unsigned current_sps_id; ///< id of the current SPS + SPS sps; ///< current sps + + /** + * current pps + */ + PPS pps; // FIXME move to Picture perhaps? (->no) do we need that? + + uint32_t dequant4_buffer[6][QP_MAX_NUM + 1][16]; // FIXME should these be moved down? + uint32_t dequant8_buffer[6][QP_MAX_NUM + 1][64]; + uint32_t(*dequant4_coeff[6])[16]; + uint32_t(*dequant8_coeff[6])[64]; + + int slice_num; + uint16_t *slice_table; ///< slice_table_base + 2*mb_stride + 1 + int slice_type; + int slice_type_nos; ///< S free slice type (SI/SP are remapped to I/P) + 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 + int picture_structure; + int first_field; + + DECLARE_ALIGNED(8, uint16_t, sub_mb_type)[4]; + + // Weighted pred stuff + int use_weight; + int use_weight_chroma; + int luma_log2_weight_denom; + int chroma_log2_weight_denom; + // The following 2 can be changed to int8_t but that causes 10cpu cycles speedloss + int luma_weight[48][2][2]; + int chroma_weight[48][2][2][2]; + int implicit_weight[48][48][2]; + + int direct_spatial_mv_pred; + int col_parity; + int col_fieldoff; + int dist_scale_factor[32]; + int dist_scale_factor_field[2][32]; + int map_col_to_list0[2][16 + 32]; + int map_col_to_list0_field[2][2][16 + 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; + uint8_t *list_counts; ///< Array of list_count per MB specifying the slice type + 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 */ + int ref2frm[MAX_SLICES][2][64]; ///< reference to frame number lists, used in the loop filter, the first 2 are for -2,-1 + + // data partitioning + GetBitContext intra_gb; + GetBitContext inter_gb; + GetBitContext *intra_gb_ptr; + GetBitContext *inter_gb_ptr; + + const uint8_t *intra_pcm_ptr; + 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. + DECLARE_ALIGNED(16, int16_t, mb_luma_dc)[3][16 * 2]; + 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 + + /** + * Cabac + */ + CABACContext cabac; + uint8_t cabac_state[1024]; + + /* 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; + uint8_t (*mvd_table[2])[2]; + DECLARE_ALIGNED(16, uint8_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]; + uint8_t zigzag_scan_q0[16]; + uint8_t zigzag_scan8x8_q0[64]; + uint8_t zigzag_scan8x8_cavlc_q0[64]; + uint8_t field_scan_q0[16]; + uint8_t field_scan8x8_q0[64]; + uint8_t field_scan8x8_cavlc_q0[64]; + + int x264_build; + + int mb_x, mb_y; + int resync_mb_x; + int resync_mb_y; + int mb_skip_run; + int mb_height, mb_width; + int mb_stride; + int mb_num; + int mb_xy; + + int is_complex; + + // deblock + int deblocking_filter; ///< disable_deblocking_filter_idc with 1 <-> 0 + int slice_alpha_c0_offset; + int slice_beta_offset; + + // ============================================================= + // Things below are not used in the MB or more inner code + + 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 nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4) + int got_first; ///< this flag is != 0 if we've parsed a frame + + int bit_depth_luma; ///< luma bit depth from sps to detect changes + int chroma_format_idc; ///< chroma format from sps to detect changes + + SPS *sps_buffers[MAX_SPS_COUNT]; + PPS *pps_buffers[MAX_PPS_COUNT]; + + int dequant_coeff_pps; ///< reinit tables when pps changes + + uint16_t *slice_table_base; + + // 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; + + int redundant_pic_count; + + Picture default_ref_list[2][32]; ///< base reference list for all slices of a coded picture + Picture *short_ref[32]; + Picture *long_ref[32]; + Picture *delayed_pic[MAX_DELAYED_PIC_COUNT + 2]; // FIXME size? + int last_pocs[MAX_DELAYED_PIC_COUNT]; + Picture *next_output_pic; + int outputed_poc; + int next_outputed_poc; + + /** + * memory management control operations buffer. + */ + MMCO mmco[MAX_MMCO_COUNT]; + int mmco_index; + int mmco_reset; + + int long_ref_count; ///< number of actual long term references + int short_ref_count; ///< number of actual short term references + + int cabac_init_idc; + + /** + * @name Members for slice based multithreading + * @{ + */ + struct H264Context *thread_context[MAX_THREADS]; + + /** + * current slice number, used to initialize 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; + + int slice_context_count; + + /** + * 1 if the single thread fallback warning has already been + * displayed, 0 otherwise. + */ + int single_decode_warning; + + enum AVPictureType pict_type; + + int last_slice_type; + unsigned int last_ref_count[2]; + /** @} */ + + /** + * pic_struct in picture timing SEI message + */ + SEI_PicStructType sei_pic_struct; + + /** + * Complement sei_pic_struct + * SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced frames. + * However, soft telecined frames may have these values. + * This is used in an attempt to flag soft telecine progressive. + */ + int prev_interlaced_frame; + + /** + * Bit set of clock types for fields/frames in picture timing SEI message. + * For each found ct_type, appropriate bit is set (e.g., bit 1 for + * interlaced). + */ + int sei_ct_type; + + /** + * dpb_output_delay in picture timing SEI message, see H.264 C.2.2 + */ + int sei_dpb_output_delay; + + /** + * cpb_removal_delay in picture timing SEI message, see H.264 C.1.2 + */ + int sei_cpb_removal_delay; + + /** + * recovery_frame_cnt from SEI message + * + * Set to -1 if no recovery point SEI message found or to number of frames + * before playback synchronizes. Frames having recovery point are key + * frames. + */ + int sei_recovery_frame_cnt; + /** + * recovery_frame is the frame_num at which the next frame should + * be fully constructed. + * + * Set to -1 when not expecting a recovery point. + */ + int recovery_frame; + + /** + * Are the SEI recovery points looking valid. + */ + int valid_recovery_point; + + int luma_weight_flag[2]; ///< 7.4.3.2 luma_weight_lX_flag + int chroma_weight_flag[2]; ///< 7.4.3.2 chroma_weight_lX_flag + + // Timestamp stuff + int sei_buffering_period_present; ///< Buffering period SEI flag + int initial_cpb_removal_delay[32]; ///< Initial timestamps for CPBs + + int cur_chroma_format_idc; + uint8_t *bipred_scratchpad; + + int16_t slice_row[MAX_SLICES]; ///< to detect when MAX_SLICES is too low + + int sync; ///< did we had a keyframe or recovery point + + uint8_t parse_history[4]; + int parse_history_count; + int parse_last_mb; + uint8_t *edge_emu_buffer; + int16_t *dc_val_base; + + uint8_t *visualization_buffer[3]; ///< temporary buffer vor MV visualization + + AVBufferPool *qscale_table_pool; + AVBufferPool *mb_type_pool; + AVBufferPool *motion_val_pool; + AVBufferPool *ref_index_pool; +} H264Context; + +extern const uint8_t ff_h264_chroma_qp[7][QP_MAX_NUM + 1]; ///< One chroma qp table for each possible bit depth (8-14). +extern const uint16_t ff_h264_mb_sizes[4]; + +/** + * Decode SEI + */ +int ff_h264_decode_sei(H264Context *h); + +/** + * Decode SPS + */ +int ff_h264_decode_seq_parameter_set(H264Context *h); + +/** + * compute profile from sps + */ +int ff_h264_get_profile(SPS *sps); + +/** + * Decode PPS + */ +int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length); + +/** + * Decode a network abstraction layer unit. + * @param consumed is the number of bytes used as input + * @param length is the length of the array + * @param dst_length is the number of decoded bytes FIXME here + * or a decode rbsp tailing? + * @return decoded bytes, might be src+1 if no escapes + */ +const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, + int *dst_length, int *consumed, int length); + +/** + * Free any data that may have been allocated in the H264 context + * like SPS, PPS etc. + */ +void ff_h264_free_context(H264Context *h); + +/** + * Reconstruct bitstream slice_type. + */ +int ff_h264_get_slice_type(const H264Context *h); + +/** + * Allocate tables. + * needs width/height + */ +int ff_h264_alloc_tables(H264Context *h); + +/** + * Fill the default_ref_list. + */ +int ff_h264_fill_default_ref_list(H264Context *h); + +int ff_h264_decode_ref_pic_list_reordering(H264Context *h); +void ff_h264_fill_mbaff_ref_list(H264Context *h); +void ff_h264_remove_all_refs(H264Context *h); + +/** + * Execute the reference picture marking (memory management control operations). + */ +int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count); + +int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb, + int first_slice); + +int ff_generate_sliding_window_mmcos(H264Context *h, int first_slice); + +/** + * Check if the top & left blocks are available if needed & change the + * dc mode so it only uses the available blocks. + */ +int ff_h264_check_intra4x4_pred_mode(H264Context *h); + +/** + * Check if the top & left blocks are available if needed & change the + * dc mode so it only uses the available blocks. + */ +int ff_h264_check_intra_pred_mode(H264Context *h, int mode, int is_chroma); + +void ff_h264_hl_decode_mb(H264Context *h); +int ff_h264_decode_extradata(H264Context *h, const uint8_t *buf, int size); +int ff_h264_decode_init(AVCodecContext *avctx); +void ff_h264_decode_init_vlc(void); + +/** + * Decode a macroblock + * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error + */ +int ff_h264_decode_mb_cavlc(H264Context *h); + +/** + * Decode a CABAC coded macroblock + * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error + */ +int ff_h264_decode_mb_cabac(H264Context *h); + +void ff_h264_init_cabac_states(H264Context *h); + +void ff_h264_direct_dist_scale_factor(H264Context *const h); +void ff_h264_direct_ref_list_init(H264Context *const h); +void ff_h264_pred_direct_motion(H264Context *const h, int *mb_type); + +void 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); +void 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); + +/** + * Reset SEI values at the beginning of the frame. + * + * @param h H.264 context. + */ +void ff_h264_reset_sei(H264Context *h); + +/* + * o-o o-o + * / / / + * o-o o-o + * ,---' + * o-o o-o + * / / / + * o-o o-o + */ + +/* Scan8 organization: + * 0 1 2 3 4 5 6 7 + * 0 DY y y y y y + * 1 y Y Y Y Y + * 2 y Y Y Y Y + * 3 y Y Y Y Y + * 4 y Y Y Y Y + * 5 DU u u u u u + * 6 u U U U U + * 7 u U U U U + * 8 u U U U U + * 9 u U U U U + * 10 DV v v v v v + * 11 v V V V V + * 12 v V V V V + * 13 v V V V V + * 14 v V V V V + * DY/DU/DV are for luma/chroma DC. + */ + +#define LUMA_DC_BLOCK_INDEX 48 +#define CHROMA_DC_BLOCK_INDEX 49 + +// This table must be here because scan8[constant] must be known at compiletime +static const uint8_t scan8[16 * 3 + 3] = { + 4 + 1 * 8, 5 + 1 * 8, 4 + 2 * 8, 5 + 2 * 8, + 6 + 1 * 8, 7 + 1 * 8, 6 + 2 * 8, 7 + 2 * 8, + 4 + 3 * 8, 5 + 3 * 8, 4 + 4 * 8, 5 + 4 * 8, + 6 + 3 * 8, 7 + 3 * 8, 6 + 4 * 8, 7 + 4 * 8, + 4 + 6 * 8, 5 + 6 * 8, 4 + 7 * 8, 5 + 7 * 8, + 6 + 6 * 8, 7 + 6 * 8, 6 + 7 * 8, 7 + 7 * 8, + 4 + 8 * 8, 5 + 8 * 8, 4 + 9 * 8, 5 + 9 * 8, + 6 + 8 * 8, 7 + 8 * 8, 6 + 9 * 8, 7 + 9 * 8, + 4 + 11 * 8, 5 + 11 * 8, 4 + 12 * 8, 5 + 12 * 8, + 6 + 11 * 8, 7 + 11 * 8, 6 + 12 * 8, 7 + 12 * 8, + 4 + 13 * 8, 5 + 13 * 8, 4 + 14 * 8, 5 + 14 * 8, + 6 + 13 * 8, 7 + 13 * 8, 6 + 14 * 8, 7 + 14 * 8, + 0 + 0 * 8, 0 + 5 * 8, 0 + 10 * 8 +}; + +static av_always_inline uint32_t pack16to32(int a, int b) +{ +#if HAVE_BIGENDIAN + return (b & 0xFFFF) + (a << 16); +#else + return (a & 0xFFFF) + (b << 16); +#endif +} + +static av_always_inline uint16_t pack8to16(int a, int b) +{ +#if HAVE_BIGENDIAN + return (b & 0xFF) + (a << 8); +#else + return (a & 0xFF) + (b << 8); +#endif +} + +/** + * Get the chroma qp. + */ +static av_always_inline int get_chroma_qp(H264Context *h, int t, int qscale) +{ + return h->pps.chroma_qp_table[t][qscale]; +} + +/** + * Get the predicted intra4x4 prediction mode. + */ +static av_always_inline int pred_intra_mode(H264Context *h, int n) +{ + const int index8 = scan8[n]; + const int left = h->intra4x4_pred_mode_cache[index8 - 1]; + const int top = h->intra4x4_pred_mode_cache[index8 - 8]; + const int min = FFMIN(left, top); + + tprintf(h->avctx, "mode:%d %d min:%d\n", left, top, min); + + if (min < 0) + return DC_PRED; + else + return min; +} + +static av_always_inline void write_back_intra_pred_mode(H264Context *h) +{ + int8_t *i4x4 = h->intra4x4_pred_mode + h->mb2br_xy[h->mb_xy]; + int8_t *i4x4_cache = h->intra4x4_pred_mode_cache; + + AV_COPY32(i4x4, i4x4_cache + 4 + 8 * 4); + i4x4[4] = i4x4_cache[7 + 8 * 3]; + i4x4[5] = i4x4_cache[7 + 8 * 2]; + i4x4[6] = i4x4_cache[7 + 8 * 1]; +} + +static av_always_inline void write_back_non_zero_count(H264Context *h) +{ + const int mb_xy = h->mb_xy; + uint8_t *nnz = h->non_zero_count[mb_xy]; + uint8_t *nnz_cache = h->non_zero_count_cache; + + AV_COPY32(&nnz[ 0], &nnz_cache[4 + 8 * 1]); + AV_COPY32(&nnz[ 4], &nnz_cache[4 + 8 * 2]); + AV_COPY32(&nnz[ 8], &nnz_cache[4 + 8 * 3]); + AV_COPY32(&nnz[12], &nnz_cache[4 + 8 * 4]); + AV_COPY32(&nnz[16], &nnz_cache[4 + 8 * 6]); + AV_COPY32(&nnz[20], &nnz_cache[4 + 8 * 7]); + AV_COPY32(&nnz[32], &nnz_cache[4 + 8 * 11]); + AV_COPY32(&nnz[36], &nnz_cache[4 + 8 * 12]); + + if (!h->chroma_y_shift) { + AV_COPY32(&nnz[24], &nnz_cache[4 + 8 * 8]); + AV_COPY32(&nnz[28], &nnz_cache[4 + 8 * 9]); + AV_COPY32(&nnz[40], &nnz_cache[4 + 8 * 13]); + AV_COPY32(&nnz[44], &nnz_cache[4 + 8 * 14]); + } +} + +static av_always_inline void write_back_motion_list(H264Context *h, + int b_stride, + int b_xy, int b8_xy, + int mb_type, int list) +{ + int16_t(*mv_dst)[2] = &h->cur_pic.motion_val[list][b_xy]; + int16_t(*mv_src)[2] = &h->mv_cache[list][scan8[0]]; + AV_COPY128(mv_dst + 0 * b_stride, mv_src + 8 * 0); + AV_COPY128(mv_dst + 1 * b_stride, mv_src + 8 * 1); + AV_COPY128(mv_dst + 2 * b_stride, mv_src + 8 * 2); + AV_COPY128(mv_dst + 3 * b_stride, mv_src + 8 * 3); + if (CABAC(h)) { + uint8_t (*mvd_dst)[2] = &h->mvd_table[list][FMO ? 8 * h->mb_xy + : h->mb2br_xy[h->mb_xy]]; + uint8_t(*mvd_src)[2] = &h->mvd_cache[list][scan8[0]]; + if (IS_SKIP(mb_type)) { + AV_ZERO128(mvd_dst); + } else { + AV_COPY64(mvd_dst, mvd_src + 8 * 3); + AV_COPY16(mvd_dst + 3 + 3, mvd_src + 3 + 8 * 0); + AV_COPY16(mvd_dst + 3 + 2, mvd_src + 3 + 8 * 1); + AV_COPY16(mvd_dst + 3 + 1, mvd_src + 3 + 8 * 2); + } + } + + { + int8_t *ref_index = &h->cur_pic.ref_index[list][b8_xy]; + int8_t *ref_cache = h->ref_cache[list]; + ref_index[0 + 0 * 2] = ref_cache[scan8[0]]; + ref_index[1 + 0 * 2] = ref_cache[scan8[4]]; + ref_index[0 + 1 * 2] = ref_cache[scan8[8]]; + ref_index[1 + 1 * 2] = ref_cache[scan8[12]]; + } +} + +static av_always_inline void write_back_motion(H264Context *h, int mb_type) +{ + const int b_stride = h->b_stride; + const int b_xy = 4 * h->mb_x + 4 * h->mb_y * h->b_stride; // try mb2b(8)_xy + const int b8_xy = 4 * h->mb_xy; + + if (USES_LIST(mb_type, 0)) { + write_back_motion_list(h, b_stride, b_xy, b8_xy, mb_type, 0); + } else { + fill_rectangle(&h->cur_pic.ref_index[0][b8_xy], + 2, 2, 2, (uint8_t)LIST_NOT_USED, 1); + } + if (USES_LIST(mb_type, 1)) + write_back_motion_list(h, b_stride, b_xy, b8_xy, mb_type, 1); + + if (h->slice_type_nos == AV_PICTURE_TYPE_B && CABAC(h)) { + if (IS_8X8(mb_type)) { + uint8_t *direct_table = &h->direct_table[4 * h->mb_xy]; + direct_table[1] = h->sub_mb_type[1] >> 1; + direct_table[2] = h->sub_mb_type[2] >> 1; + direct_table[3] = h->sub_mb_type[3] >> 1; + } + } +} + +static av_always_inline int get_dct8x8_allowed(H264Context *h) +{ + if (h->sps.direct_8x8_inference_flag) + return !(AV_RN64A(h->sub_mb_type) & + ((MB_TYPE_16x8 | MB_TYPE_8x16 | MB_TYPE_8x8) * + 0x0001000100010001ULL)); + else + return !(AV_RN64A(h->sub_mb_type) & + ((MB_TYPE_16x8 | MB_TYPE_8x16 | MB_TYPE_8x8 | MB_TYPE_DIRECT2) * + 0x0001000100010001ULL)); +} + +void ff_h264_draw_horiz_band(H264Context *h, int y, int height); + +#endif /* AVCODEC_H264_H */ |