Windows CE

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C/C++

h264.c：源码内容

/* * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> * * This library 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 of the License, or (at your option) any later version. * * This library 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 this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ /** * @file h264.c * H.264 / AVC / MPEG4 part10 codec. * @author Michael Niedermayer <michaelni@gmx.at> */ #include "common.h" #include "dsputil.h" #include "avcodec.h" #include "mpegvideo.h" #include "h264data.h" #include "golomb.h" #include "cabac.h" //#undef NDEBUG //#include <assert.h> #define interlaced_dct interlaced_dct_is_a_bad_name #define mb_intra mb_intra_isnt_initalized_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 /** * 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; ///< frame_width_in_mbs_minus1 + 1 int mb_height; ///< frame_height_in_mbs_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; }SPS; /** * Picture parameter set */ typedef struct PPS{ 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; 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; 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 }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_frame_num; int long_index; } MMCO; /** * H264Context */ typedef struct H264Context{ MpegEncContext s; int nal_ref_idc; int nal_unit_type; #define NAL_SLICE 1 #define NAL_DPA 2 #define NAL_DPB 3 #define NAL_DPC 4 #define NAL_IDR_SLICE 5 #define NAL_SEI 6 #define NAL_SPS 7 #define NAL_PPS 8 #define NAL_PICTURE_DELIMITER 9 #define NAL_FILTER_DATA 10 uint8_t *rbsp_buffer; int rbsp_buffer_size; /** * 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; //QPc int prev_mb_skipped; //FIXME remove (IMHO not used) //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]; void (*pred4x4 [9+3])(uint8_t *src, uint8_t *topright, int stride);//FIXME move to dsp? void (*pred8x8l [9+3])(uint8_t *src, int topleft, int topright, int stride); void (*pred8x8 [4+3])(uint8_t *src, int stride); void (*pred16x16[4+3])(uint8_t *src, int stride); 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. */ __align(a)
uint8_t non_zero_count_cache[6*8] __align8; uint8_t (*non_zero_count)[16]; /** * Motion vector cache. */ int16_t mv_cache[2][5*8][2] __align8; int8_t ref_cache[2][5*8] __align8; #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 halfpel_flag; int thirdpel_flag; int unknown_svq3_flag; int next_slice_index; SPS sps_buffer[MAX_SPS_COUNT]; SPS sps; ///< current sps PPS pps_buffer[MAX_PPS_COUNT]; /** * current pps */ PPS pps; //FIXME move to Picture perhaps? (->no) do we need that? uint16_t (*dequant4_coeff)[16]; // FIXME quant matrices should be per SPS or PPS uint16_t (*dequant8_coeff)[64]; int slice_num; uint8_t *slice_table_base; uint8_t *slice_table; ///< slice_table_base + mb_stride + 1 int slice_type; int slice_type_fixed; //interlacing specific flags int mb_aff_frame; int mb_field_decoding_flag; 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 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][16]; int luma_offset[2][16]; int chroma_weight[2][16][2]; int chroma_offset[2][16][2]; int implicit_weight[16][16]; //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 map_col_to_list0[2][16]; /** * num_ref_idx_l0/1_active_minus1 + 1 */ int ref_count[2];// FIXME split for AFF Picture *short_ref[32]; Picture *long_ref[32]; Picture default_ref_list[2][32]; Picture ref_list[2][32]; //FIXME size? Picture field_ref_list[2][32]; //FIXME size? Picture *delayed_pic[16]; //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; DCTELEM mb[16*24] __align8; /** * 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 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]; int16_t mvd_cache[2][5*8][2] __align8; uint8_t *direct_table; uint8_t direct_cache[5*8]; uint8_t zigzag_scan[16]; uint8_t field_scan[16]; const uint8_t *zigzag_scan_q0; const uint8_t *field_scan_q0; int x264_build; }H264Context; static VLC coeff_token_vlc[4]; static VLC chroma_dc_coeff_token_vlc; static VLC total_zeros_vlc[15]; static VLC chroma_dc_total_zeros_vlc[3]; static VLC run_vlc[6]; static VLC run7_vlc; static void svq3_luma_dc_dequant_idct_c(DCTELEM *block, int qp); static void svq3_add_idct_c(uint8_t *dst, DCTELEM *block, int stride, int qp, int dc); static void 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); static inline uint32_t pack16to32(int a, int b){ #ifdef WORDS_BIGENDIAN return (b&0xFFFF) + (a<<16); #else return (a&0xFFFF) + (b<<16); #endif } /** * fill a rectangle. * @param h height of the rectangle, should be a constant * @param w width of the rectangle, should be a constant * @param size the size of val (1 or 4), should be a constant */ static inline void fill_rectangle(void *vp, int w, int h, int stride, uint32_t val, int size){ //FIXME ensure this IS inlined uint8_t *p= (uint8_t*)vp; assert(size==1 || size==4); w *= size; stride *= size; assert((((int)vp)&(FFMIN(w, STRIDE_ALIGN)-1)) == 0); assert((stride&(w-1))==0); //FIXME check what gcc generates for 64 bit on x86 and possibly write a 32 bit ver of it if(w==2 && h==2){ *(uint16_t*)(p + 0)= *(uint16_t*)(p + stride)= size==4 ? val : val*0x0101; }else if(w==2 && h==4){ *(uint16_t*)(p + 0*stride)= *(uint16_t*)(p + 1*stride)= *(uint16_t*)(p + 2*stride)= *(uint16_t*)(p + 3*stride)= size==4 ? val : val*0x0101; }else if(w==4 && h==1){ *(uint32_t*)(p + 0*stride)= size==4 ? val : val*0x01010101; }else if(w==4 && h==2){ *(uint32_t*)(p + 0*stride)= *(uint32_t*)(p + 1*stride)= size==4 ? val : val*0x01010101; }else if(w==4 && h==4){ *(uint32_t*)(p + 0*stride)= *(uint32_t*)(p + 1*stride)= *(uint32_t*)(p + 2*stride)= *(uint32_t*)(p + 3*stride)= size==4 ? val : val*0x01010101; }else if(w==8 && h==1){ *(uint32_t*)(p + 0)= *(uint32_t*)(p + 4)= size==4 ? val : val*0x01010101; }else if(w==8 && h==2){ *(uint32_t*)(p + 0 + 0*stride)= *(uint32_t*)(p + 4 + 0*stride)= *(uint32_t*)(p + 0 + 1*stride)= *(uint32_t*)(p + 4 + 1*stride)= size==4 ? val : val*0x01010101; }else if(w==8 && h==4){ *(uint64_t*)(p + 0*stride)= *(uint64_t*)(p + 1*stride)= *(uint64_t*)(p + 2*stride)= *(uint64_t*)(p + 3*stride)= size==4 ? (uint64_t)val*0x0100000001U : (uint64_t)val*0x0101010101010101U;
}else if(w==16 && h==2){ *(uint64_t*)(p + 0+0*stride)= *(uint64_t*)(p + 8+0*stride)= *(uint64_t*)(p + 0+1*stride)= *(uint64_t*)(p + 8+1*stride)= size==4 ? (uint64_t)val*0x0100000001U : (uint64_t)val*0x0101010101010101U;
}else if(w==16 && h==4){ *(uint64_t*)(p + 0+0*stride)= *(uint64_t*)(p + 8+0*stride)= *(uint64_t*)(p + 0+1*stride)= *(uint64_t*)(p + 8+1*stride)= *(uint64_t*)(p + 0+2*stride)= *(uint64_t*)(p + 8+2*stride)= *(uint64_t*)(p + 0+3*stride)= *(uint64_t*)(p + 8+3*stride)= size==4 ? (uint64_t)val*0x0100000001U : (uint64_t)val*0x0101010101010101U;