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9e696d2e5f
Fixes CVE-2012-2782.
905 lines
28 KiB
C
905 lines
28 KiB
C
/*
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* H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
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* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* H.264 / AVC / MPEG4 part10 codec.
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* @author Michael Niedermayer <michaelni@gmx.at>
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*/
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#ifndef AVCODEC_H264_H
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#define AVCODEC_H264_H
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#include "libavutil/intreadwrite.h"
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#include "dsputil.h"
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#include "cabac.h"
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#include "mpegvideo.h"
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#include "h264dsp.h"
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#include "h264pred.h"
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#include "rectangle.h"
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#define interlaced_dct interlaced_dct_is_a_bad_name
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#define mb_intra mb_intra_is_not_initialized_see_mb_type
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#define MAX_SPS_COUNT 32
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#define MAX_PPS_COUNT 256
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#define MAX_MMCO_COUNT 66
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#define MAX_DELAYED_PIC_COUNT 16
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/* Compiling in interlaced support reduces the speed
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* of progressive decoding by about 2%. */
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#define ALLOW_INTERLACE
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#define FMO 0
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/**
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* The maximum number of slices supported by the decoder.
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* must be a power of 2
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*/
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#define MAX_SLICES 16
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#ifdef ALLOW_INTERLACE
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#define MB_MBAFF h->mb_mbaff
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#define MB_FIELD h->mb_field_decoding_flag
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#define FRAME_MBAFF h->mb_aff_frame
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#define FIELD_PICTURE (s->picture_structure != PICT_FRAME)
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#define LEFT_MBS 2
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#define LTOP 0
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#define LBOT 1
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#define LEFT(i) (i)
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#else
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#define MB_MBAFF 0
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#define MB_FIELD 0
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#define FRAME_MBAFF 0
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#define FIELD_PICTURE 0
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#undef IS_INTERLACED
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#define IS_INTERLACED(mb_type) 0
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#define LEFT_MBS 1
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#define LTOP 0
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#define LBOT 0
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#define LEFT(i) 0
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#endif
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#define FIELD_OR_MBAFF_PICTURE (FRAME_MBAFF || FIELD_PICTURE)
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#ifndef CABAC
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#define CABAC h->pps.cabac
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#endif
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#define CHROMA422 (h->sps.chroma_format_idc == 2)
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#define CHROMA444 (h->sps.chroma_format_idc == 3)
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#define EXTENDED_SAR 255
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#define MB_TYPE_REF0 MB_TYPE_ACPRED // dirty but it fits in 16 bit
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#define MB_TYPE_8x8DCT 0x01000000
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#define IS_REF0(a) ((a) & MB_TYPE_REF0)
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#define IS_8x8DCT(a) ((a) & MB_TYPE_8x8DCT)
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#define QP_MAX_NUM (51 + 2 * 6) // The maximum supported qp
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/* NAL unit types */
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enum {
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NAL_SLICE = 1,
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NAL_DPA,
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NAL_DPB,
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NAL_DPC,
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NAL_IDR_SLICE,
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NAL_SEI,
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NAL_SPS,
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NAL_PPS,
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NAL_AUD,
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NAL_END_SEQUENCE,
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NAL_END_STREAM,
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NAL_FILLER_DATA,
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NAL_SPS_EXT,
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NAL_AUXILIARY_SLICE = 19,
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NAL_FF_IGNORE = 0xff0f001,
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};
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/**
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* SEI message types
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*/
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typedef enum {
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SEI_BUFFERING_PERIOD = 0, ///< buffering period (H.264, D.1.1)
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SEI_TYPE_PIC_TIMING = 1, ///< picture timing
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SEI_TYPE_USER_DATA_UNREGISTERED = 5, ///< unregistered user data
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SEI_TYPE_RECOVERY_POINT = 6 ///< recovery point (frame # to decoder sync)
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} SEI_Type;
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/**
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* pic_struct in picture timing SEI message
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*/
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typedef enum {
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SEI_PIC_STRUCT_FRAME = 0, ///< 0: %frame
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SEI_PIC_STRUCT_TOP_FIELD = 1, ///< 1: top field
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SEI_PIC_STRUCT_BOTTOM_FIELD = 2, ///< 2: bottom field
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SEI_PIC_STRUCT_TOP_BOTTOM = 3, ///< 3: top field, bottom field, in that order
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SEI_PIC_STRUCT_BOTTOM_TOP = 4, ///< 4: bottom field, top field, in that order
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SEI_PIC_STRUCT_TOP_BOTTOM_TOP = 5, ///< 5: top field, bottom field, top field repeated, in that order
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SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM = 6, ///< 6: bottom field, top field, bottom field repeated, in that order
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SEI_PIC_STRUCT_FRAME_DOUBLING = 7, ///< 7: %frame doubling
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SEI_PIC_STRUCT_FRAME_TRIPLING = 8 ///< 8: %frame tripling
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} SEI_PicStructType;
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/**
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* Sequence parameter set
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*/
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typedef struct SPS {
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int profile_idc;
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int level_idc;
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int chroma_format_idc;
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int transform_bypass; ///< qpprime_y_zero_transform_bypass_flag
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int log2_max_frame_num; ///< log2_max_frame_num_minus4 + 4
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int poc_type; ///< pic_order_cnt_type
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int log2_max_poc_lsb; ///< log2_max_pic_order_cnt_lsb_minus4
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int delta_pic_order_always_zero_flag;
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int offset_for_non_ref_pic;
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int offset_for_top_to_bottom_field;
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int poc_cycle_length; ///< num_ref_frames_in_pic_order_cnt_cycle
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int ref_frame_count; ///< num_ref_frames
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int gaps_in_frame_num_allowed_flag;
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int mb_width; ///< pic_width_in_mbs_minus1 + 1
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int mb_height; ///< pic_height_in_map_units_minus1 + 1
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int frame_mbs_only_flag;
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int mb_aff; ///< mb_adaptive_frame_field_flag
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int direct_8x8_inference_flag;
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int crop; ///< frame_cropping_flag
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unsigned int crop_left; ///< frame_cropping_rect_left_offset
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unsigned int crop_right; ///< frame_cropping_rect_right_offset
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unsigned int crop_top; ///< frame_cropping_rect_top_offset
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unsigned int crop_bottom; ///< frame_cropping_rect_bottom_offset
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int vui_parameters_present_flag;
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AVRational sar;
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int video_signal_type_present_flag;
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int full_range;
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int colour_description_present_flag;
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enum AVColorPrimaries color_primaries;
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enum AVColorTransferCharacteristic color_trc;
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enum AVColorSpace colorspace;
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int timing_info_present_flag;
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uint32_t num_units_in_tick;
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uint32_t time_scale;
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int fixed_frame_rate_flag;
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short offset_for_ref_frame[256]; // FIXME dyn aloc?
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int bitstream_restriction_flag;
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int num_reorder_frames;
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int scaling_matrix_present;
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uint8_t scaling_matrix4[6][16];
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uint8_t scaling_matrix8[6][64];
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int nal_hrd_parameters_present_flag;
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int vcl_hrd_parameters_present_flag;
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int pic_struct_present_flag;
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int time_offset_length;
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int cpb_cnt; ///< See H.264 E.1.2
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int initial_cpb_removal_delay_length; ///< initial_cpb_removal_delay_length_minus1 + 1
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int cpb_removal_delay_length; ///< cpb_removal_delay_length_minus1 + 1
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int dpb_output_delay_length; ///< dpb_output_delay_length_minus1 + 1
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int bit_depth_luma; ///< bit_depth_luma_minus8 + 8
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int bit_depth_chroma; ///< bit_depth_chroma_minus8 + 8
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int residual_color_transform_flag; ///< residual_colour_transform_flag
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int constraint_set_flags; ///< constraint_set[0-3]_flag
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int new; ///< flag to keep track if the decoder context needs re-init due to changed SPS
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} SPS;
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/**
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* Picture parameter set
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*/
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typedef struct PPS {
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unsigned int sps_id;
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int cabac; ///< entropy_coding_mode_flag
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int pic_order_present; ///< pic_order_present_flag
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int slice_group_count; ///< num_slice_groups_minus1 + 1
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int mb_slice_group_map_type;
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unsigned int ref_count[2]; ///< num_ref_idx_l0/1_active_minus1 + 1
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int weighted_pred; ///< weighted_pred_flag
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int weighted_bipred_idc;
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int init_qp; ///< pic_init_qp_minus26 + 26
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int init_qs; ///< pic_init_qs_minus26 + 26
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int chroma_qp_index_offset[2];
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int deblocking_filter_parameters_present; ///< deblocking_filter_parameters_present_flag
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int constrained_intra_pred; ///< constrained_intra_pred_flag
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int redundant_pic_cnt_present; ///< redundant_pic_cnt_present_flag
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int transform_8x8_mode; ///< transform_8x8_mode_flag
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uint8_t scaling_matrix4[6][16];
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uint8_t scaling_matrix8[6][64];
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uint8_t chroma_qp_table[2][64]; ///< pre-scaled (with chroma_qp_index_offset) version of qp_table
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int chroma_qp_diff;
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} PPS;
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/**
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* Memory management control operation opcode.
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*/
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typedef enum MMCOOpcode {
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MMCO_END = 0,
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MMCO_SHORT2UNUSED,
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MMCO_LONG2UNUSED,
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MMCO_SHORT2LONG,
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MMCO_SET_MAX_LONG,
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MMCO_RESET,
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MMCO_LONG,
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} MMCOOpcode;
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/**
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* Memory management control operation.
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*/
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typedef struct MMCO {
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MMCOOpcode opcode;
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int short_pic_num; ///< pic_num without wrapping (pic_num & max_pic_num)
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int long_arg; ///< index, pic_num, or num long refs depending on opcode
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} MMCO;
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/**
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* H264Context
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*/
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typedef struct H264Context {
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MpegEncContext s;
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H264DSPContext h264dsp;
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int pixel_shift; ///< 0 for 8-bit H264, 1 for high-bit-depth H264
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int chroma_qp[2]; // QPc
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int qp_thresh; ///< QP threshold to skip loopfilter
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int prev_mb_skipped;
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int next_mb_skipped;
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// prediction stuff
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int chroma_pred_mode;
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int intra16x16_pred_mode;
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int topleft_mb_xy;
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int top_mb_xy;
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int topright_mb_xy;
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int left_mb_xy[LEFT_MBS];
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int topleft_type;
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int top_type;
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int topright_type;
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int left_type[LEFT_MBS];
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const uint8_t *left_block;
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int topleft_partition;
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int8_t intra4x4_pred_mode_cache[5 * 8];
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int8_t(*intra4x4_pred_mode);
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H264PredContext hpc;
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unsigned int topleft_samples_available;
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unsigned int top_samples_available;
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unsigned int topright_samples_available;
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unsigned int left_samples_available;
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uint8_t (*top_borders[2])[(16 * 3) * 2];
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/**
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* non zero coeff count cache.
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* is 64 if not available.
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*/
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DECLARE_ALIGNED(8, uint8_t, non_zero_count_cache)[15 * 8];
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uint8_t (*non_zero_count)[48];
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/**
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* Motion vector cache.
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*/
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DECLARE_ALIGNED(16, int16_t, mv_cache)[2][5 * 8][2];
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DECLARE_ALIGNED(8, int8_t, ref_cache)[2][5 * 8];
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#define LIST_NOT_USED -1 // FIXME rename?
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#define PART_NOT_AVAILABLE -2
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/**
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* number of neighbors (top and/or left) that used 8x8 dct
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*/
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int neighbor_transform_size;
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/**
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* block_offset[ 0..23] for frame macroblocks
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* block_offset[24..47] for field macroblocks
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*/
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int block_offset[2 * (16 * 3)];
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uint32_t *mb2b_xy; // FIXME are these 4 a good idea?
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uint32_t *mb2br_xy;
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int b_stride; // FIXME use s->b4_stride
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int mb_linesize; ///< may be equal to s->linesize or s->linesize * 2, for mbaff
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int mb_uvlinesize;
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int emu_edge_width;
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int emu_edge_height;
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unsigned current_sps_id; ///< id of the current SPS
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SPS sps; ///< current sps
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/**
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* current pps
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*/
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PPS pps; // FIXME move to Picture perhaps? (->no) do we need that?
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uint32_t dequant4_buffer[6][QP_MAX_NUM + 1][16]; // FIXME should these be moved down?
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uint32_t dequant8_buffer[6][QP_MAX_NUM + 1][64];
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uint32_t(*dequant4_coeff[6])[16];
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uint32_t(*dequant8_coeff[6])[64];
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int slice_num;
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uint16_t *slice_table; ///< slice_table_base + 2*mb_stride + 1
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int slice_type;
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int slice_type_nos; ///< S free slice type (SI/SP are remapped to I/P)
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int slice_type_fixed;
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// interlacing specific flags
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int mb_aff_frame;
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int mb_field_decoding_flag;
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int mb_mbaff; ///< mb_aff_frame && mb_field_decoding_flag
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DECLARE_ALIGNED(8, uint16_t, sub_mb_type)[4];
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// Weighted pred stuff
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int use_weight;
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int use_weight_chroma;
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int luma_log2_weight_denom;
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int chroma_log2_weight_denom;
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// The following 2 can be changed to int8_t but that causes 10cpu cycles speedloss
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int luma_weight[48][2][2];
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int chroma_weight[48][2][2][2];
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int implicit_weight[48][48][2];
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int direct_spatial_mv_pred;
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int col_parity;
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int col_fieldoff;
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int dist_scale_factor[32];
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int dist_scale_factor_field[2][32];
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int map_col_to_list0[2][16 + 32];
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int map_col_to_list0_field[2][2][16 + 32];
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/**
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* num_ref_idx_l0/1_active_minus1 + 1
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*/
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unsigned int ref_count[2]; ///< counts frames or fields, depending on current mb mode
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unsigned int list_count;
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uint8_t *list_counts; ///< Array of list_count per MB specifying the slice type
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Picture ref_list[2][48]; /**< 0..15: frame refs, 16..47: mbaff field refs.
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* Reordered version of default_ref_list
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* according to picture reordering in slice header */
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int ref2frm[MAX_SLICES][2][64]; ///< reference to frame number lists, used in the loop filter, the first 2 are for -2,-1
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// data partitioning
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GetBitContext intra_gb;
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GetBitContext inter_gb;
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GetBitContext *intra_gb_ptr;
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GetBitContext *inter_gb_ptr;
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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.
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DECLARE_ALIGNED(16, DCTELEM, mb_luma_dc)[3][16 * 2];
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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
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/**
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* Cabac
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*/
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CABACContext cabac;
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uint8_t cabac_state[1024];
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/* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0, 1, 2), 0x0? luma_cbp */
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uint16_t *cbp_table;
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int cbp;
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int top_cbp;
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int left_cbp;
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/* chroma_pred_mode for i4x4 or i16x16, else 0 */
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uint8_t *chroma_pred_mode_table;
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int last_qscale_diff;
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uint8_t (*mvd_table[2])[2];
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DECLARE_ALIGNED(16, uint8_t, mvd_cache)[2][5 * 8][2];
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uint8_t *direct_table;
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uint8_t direct_cache[5 * 8];
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uint8_t zigzag_scan[16];
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uint8_t zigzag_scan8x8[64];
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uint8_t zigzag_scan8x8_cavlc[64];
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uint8_t field_scan[16];
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uint8_t field_scan8x8[64];
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uint8_t field_scan8x8_cavlc[64];
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const uint8_t *zigzag_scan_q0;
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const uint8_t *zigzag_scan8x8_q0;
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const uint8_t *zigzag_scan8x8_cavlc_q0;
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const uint8_t *field_scan_q0;
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const uint8_t *field_scan8x8_q0;
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const uint8_t *field_scan8x8_cavlc_q0;
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int x264_build;
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int mb_xy;
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int is_complex;
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// deblock
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int deblocking_filter; ///< disable_deblocking_filter_idc with 1 <-> 0
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int slice_alpha_c0_offset;
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int slice_beta_offset;
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// =============================================================
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// Things below are not used in the MB or more inner code
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int nal_ref_idc;
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int nal_unit_type;
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uint8_t *rbsp_buffer[2];
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unsigned int rbsp_buffer_size[2];
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/**
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* Used to parse AVC variant of h264
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*/
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int is_avc; ///< this flag is != 0 if codec is avc1
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int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)
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int got_first; ///< this flag is != 0 if we've parsed a frame
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int context_reinitialized;
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SPS *sps_buffers[MAX_SPS_COUNT];
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PPS *pps_buffers[MAX_PPS_COUNT];
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int dequant_coeff_pps; ///< reinit tables when pps changes
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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 *short_ref[32];
|
|
Picture *long_ref[32];
|
|
Picture default_ref_list[2][32]; ///< base reference list for all slices of a coded picture
|
|
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 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;
|
|
/** @} */
|
|
|
|
/**
|
|
* 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;
|
|
|
|
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;
|
|
} H264Context;
|
|
|
|
extern const uint8_t ff_h264_chroma_qp[3][QP_MAX_NUM + 1]; ///< One chroma qp table for each supported bit depth (8, 9, 10).
|
|
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.
|
|
*/
|
|
av_cold 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);
|
|
|
|
void ff_generate_sliding_window_mmcos(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_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_frame_start(H264Context *h);
|
|
int ff_h264_decode_extradata(H264Context *h);
|
|
av_cold int ff_h264_decode_init(AVCodecContext *avctx);
|
|
av_cold 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->s.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->s.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,
|
|
MpegEncContext *const s,
|
|
int b_stride,
|
|
int b_xy, int b8_xy,
|
|
int mb_type, int list)
|
|
{
|
|
int16_t(*mv_dst)[2] = &s->current_picture.f.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) {
|
|
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 = &s->current_picture.f.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)
|
|
{
|
|
MpegEncContext *const s = &h->s;
|
|
const int b_stride = h->b_stride;
|
|
const int b_xy = 4 * s->mb_x + 4 * s->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, s, b_stride, b_xy, b8_xy, mb_type, 0);
|
|
} else {
|
|
fill_rectangle(&s->current_picture.f.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, s, b_stride, b_xy, b8_xy, mb_type, 1);
|
|
|
|
if (h->slice_type_nos == AV_PICTURE_TYPE_B && CABAC) {
|
|
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));
|
|
}
|
|
|
|
#endif /* AVCODEC_H264_H */
|