global.h

网络MPEG4IP流媒体开发源代码

                                     generally around the predicted vector. Max vector is 2xmcrange.  For 8x8
                                     and 4x4 block sizes the search range is 1/2 of that for 16x16 blocks.       */
  int no_multpred;              /*!< 1: prediction from the last frame only. 2: prediction from the last or
                                     second last frame etc.  Maximum 5 frames                                    */
  int img_width;                //!< GH: if CUSTOM image format is chosen, use this size
  int img_height;               //!< GH: width and height must be a multiple of 16 pels
  int yuv_format;               //!< GH: YUV format (0=4:0:0, 1=4:2:0, 2=4:2:2, 3=4:4:4,currently only 4:2:0 is supported)
  int color_depth;              //!< GH: YUV color depth per component in bit/pel (currently only 8 bit/pel is supported)
  int intra_upd;                /*!< For error robustness. 0: no special action. 1: One GOB/frame is intra coded
                                     as regular 'update'. 2: One GOB every 2 frames is intra coded etc.
                                     In connection with this intra update, restrictions is put on motion vectors
                                     to prevent errors to propagate from the past                                */
  int blc_size[8][2];           //!< array for different block sizes
  int slice_mode;               //!< Indicate what algorithm to use for setting slices
  int slice_argument;           //!< Argument to the specified slice algorithm
  int UseConstrainedIntraPred;  //!< 0: Inter MB pixels are allowed for intra prediction 1: Not allowed
  int  infile_header;           //!< If input file has a header set this to the length of the header
  char infile[100];             //!< YUV 4:2:0 input format
  char outfile[100];            //!< H.26L compressed output bitstream
  char ReconFile[100];          //!< Reconstructed Pictures
  char TraceFile[100];          //!< Trace Outputs
  int intra_period;             //!< Random Access period though intra

  // B pictures
  int successive_Bframe;        //!< number of B frames that will be used
  int qpB;                      //!< QP of B frames

  // SP Pictures
  int sp_periodicity;           //!< The periodicity of SP-pictures
  int qpsp;                     //!< SP Picture QP for prediction error
  int qpsp_pred;                //!< SP Picture QP for predicted block

  // Introduced by TOM
  int symbol_mode;              //!< Specifies the mode the symbols are mapped on bits
  int of_mode;                  //!< Specifies the mode of the output file
  int partition_mode;           //!< Specifies the mode of data partitioning

  int SequenceHeaderType;
  int TRModulus;
  int PicIdModulus;

  int InterSearch16x16;
  int InterSearch16x8;
  int InterSearch8x16;
  int InterSearch8x8;
  int InterSearch8x4;
  int InterSearch4x8;
  int InterSearch4x4;

  char PictureTypeSequence[MAXPICTURETYPESEQUENCELEN];

#ifdef _FULL_SEARCH_RANGE_
  int full_search;
#endif
#ifdef _ADAPT_LAST_GROUP_
  int last_frame;
#endif
#ifdef _CHANGE_QP_
  int qpN2, qpB2, qp2start;
#endif
  int rdopt;
#ifdef _ADDITIONAL_REFERENCE_FRAME_
  int add_ref_frame;
#endif
#ifdef _LEAKYBUCKET_
  int NumberLeakyBuckets;
  char LeakyBucketRateFile[100];
  char LeakyBucketParamFile[100];
#endif

  int LossRate;
  int NoOfDecoders;

} InputParameters;

//! ImageParameters
typedef struct
{
  int number;                  //!< current image number to be encoded
  int nb_references;
  int current_mb_nr;
  int total_number_mb;
  int current_slice_nr;
  int type;
  int types;                   /*!< This is for SP-Pictures, since all the syntax elements for SP-Pictures
                                    are the same as P-pictures, we keep the img->type as P_IMG but indicate
                                    SP-Pictures by img->types */
  int no_multpred;             /*!< 1: prediction from the last frame only.
                                    2: prediction from the last or second last frame etc. */
  int multframe_no;
  int qp;                      //!< quant for the current frame
  int qpsp;                    //!< quant for the prediction frame of SP-frame
  int frame_cycle;
  int framerate;
  int width;                   //!< Number of pels
  int width_cr;                //!< Number of pels chroma
  int height;                  //!< Number of lines
  int height_cr;               //!< Number of lines  chroma
  int height_err;              //!< For y vector limitation for error robustness
  int mb_y;                    //!< current MB vertical
  int mb_x;                    //!< current MB horizontal
  int mb_x_save;               //!< horizontal position of the last written MB
  int mb_y_save;               //!< vertical position of the last written MB
  int block_y;                 //!< current block vertical
  int block_x;                 //!< current block horizontal
  int subblock_y;              //!< current subblock vertical
  int subblock_x;              //!< current subblock horizontal
  int pix_y;                   //!< current pixel vertical
  int pix_x;                   //!< current pixel horizontal
  int mb_y_upd;
  int mb_y_intra;              //!< which GOB to intra code
  int mb_mode;                 //!< MB mode relevant for inter images, for intra images are all MB intra
  int imod;                    //!< new/old intra modes + inter
  int pix_c_y;                 //!< current pixel chroma vertical
  int block_c_x;               //!< current block chroma vertical
  int pix_c_x;                 //!< current pixel chroma horizontal
  int blc_size_h;              //!< block size for motion search, horizontal
  int blc_size_v;              //!< block size for motion search, vertical
  int kac;                     //!< any AC coeffs
  int **ipredmode;             //!< GH ipredmode[90][74];prediction mode for inter frames */ /* fix from ver 4.1
  int cod_counter;             //!< Current count of number of skipped macroblocks in a row

  // some temporal buffers
  int mprr[6][4][4];           //!< all 5 prediction modes
  int mprr_2[5][16][16];       //!< all 4 new intra prediction modes
  int***** mv;                 //!< motion vectors for all block types and all reference frames
  int mpr[16][16];             //!< current best prediction mode
  int m7[16][16];              //!< the diff pixel values between orginal image and prediction
  int cof[4][6][18][2][2];     //!< coefficients
  int cofu[5][2][2];           //!< coefficients chroma

  byte tmp_loop_Y[BLOCK_MULTIPLE+2][BLOCK_MULTIPLE+2];      //!< temporal storage for LUMA loop-filter strength
  byte tmp_loop_UV[BLOCK_MULTIPLE/2+2][BLOCK_MULTIPLE/2+2]; //!< temporal storage for CHROMA loop-filter strength
  Slice       *currentSlice;                                //!< pointer to current Slice data struct
  Macroblock    *mb_data;                                   //!< array containing all MBs of a whole frame
  SyntaxElement   MB_SyntaxElements[MAX_SYMBOLS_PER_MB];    //!< temporal storage for all chosen syntax elements of one MB

  int quad[256];               //!< Array containing square values,used for snr computation  */                                         /* Values are limited to 5000 for pixel differences over 70 (sqr(5000)).
  int mv_bituse[512];
  int *slice_numbers;
  int *intra_mb;

  // UMV support
  int mhor;
  int mvert;

  int tr;
  int refPicID;                         //<! temporal reference for reference frames (non-B frames), added by WYK

  // B pictures
  int b_interval;
  int p_interval;
  int b_frame_to_code;
  int fw_mb_mode;
  int fw_multframe_no;
  int fw_blc_size_h;
  int fw_blc_size_v;
  int bw_mb_mode;
  int bw_multframe_no;
  int bw_blc_size_h;
  int bw_blc_size_v;
  int***** p_fwMV;       //!< for MVDFW
  int***** p_bwMV;       //!< for MVDBW
  int blk_bituse[10];    //!< it is included when getting bid_sad

  int***** all_mv;       //!< replaces local all_mv
  int***** all_bmv;      //!< replaces local all_mv

  int buf_cycle;

} ImageParameters;

                                //!< statistics
typedef struct
{
  int   quant0;                 //!< quant for the first frame
  int   quant1;                 //!< average quant for the remaining frames
  float bitr;                   //!< bit rate for current frame, used only for output til terminal
  float bitr0;                  //!< stored bit rate for the first frame
  float bitrate;                //!< average bit rate for the sequence except first frame
  int   bit_ctr;                //!< counter for bit usage
  int   bit_ctr_0;              //!< stored bit use for the first frame
  int   bit_ctr_n;              //!< bit usage for the current frame
  int   bit_slice;              //!< number of bits in current slice
  int   bit_use_mode_inter[33]; //!< statistics of bit usage
  int   mode_use_intra[25];     //!< Macroblock mode usage for Intra frames
  int   mode_use_inter[33];

  // B pictures
  int   *mode_use_Bframe;
  int   *bit_use_mode_Bframe;
  int   bit_ctr_P;
  int   bit_ctr_B;
  float bitrate_P;
  float bitrate_B;
  int bit_use_mb_type[3];
  int   bit_use_header[3];
  int   tmp_bit_use_cbp[3];
  int   bit_use_coeffY[3];
  int   bit_use_coeffC[3];
  int   bit_use_delta_quant[3];
} StatParameters;


extern InputParameters *input;
extern ImageParameters *img;
extern StatParameters *h26lstat;
extern SNRParameters *snr;

#ifdef H26L_LIB
extern byte* memout;
extern int memoutlength;
#endif

// files
FILE *p_dec,*p_dec_u,*p_dec_v;   //!< internal decoded image for debugging
FILE *p_stat;                    //!< status file for the last encoding session
FILE *p_log;                     //!< SNR file
FILE *p_in;                      //!< YUV
FILE *p_datpart;                 //!< file to write bitlength and id of all partitions
FILE *p_trace;                   //!< Trace file


/***********************************************************************
 * P r o t o t y p e s   f o r    T M L
 ***********************************************************************
 */


void intrapred_luma(int CurrPixX,int CurrPixY);
void init();
void find_snr();
void oneforthpix();
void oneforthpix_2();
int  encode_oneIorP_Frame();
int  encode_oneB_Frame();
int  find_sad(int hadamard, int m7[16][16]);
int  dct_luma(int pos_mb1,int pos_mb2,int *cnt_nonz);
int  dct_luma_sp(int pos_mb1,int pos_mb2,int *cnt_nonz);
int  copyblock_sp(int pos_mb1,int pos_mb2);
int  dct_chroma(int uv,int i11);
int  dct_chroma_sp(int uv,int i11);
int  motion_search(int isi);
void levrun_linfo_c2x2(int level,int run,int *len,int *info);
void levrun_linfo_intra(int level,int run,int *len,int *info);
void levrun_linfo_inter(int level,int run,int *len,int *info);
int  sign(int a,int b);
void intrapred_chroma(int,int,int uv);
#ifndef NO_RDQUANT
void rd_quant(int no_coeff,int *coeff);
#endif
void intrapred_luma_2();
int  find_sad2(int *intra_mode);
void dct_luma2(int);

void init_img();
void init_stat();
void report();
void information_init();
void init_frame();
void select_picture_type(SyntaxElement *symbol);
void read_one_new_frame();
void write_reconstructed_image();
void DeblockMb(ImageParameters *img, byte **, byte ***) ;

// dynamic mem allocation
int  get_mem4global_buffers();
void free_mem4global_buffers();
int  get_mem2D    (byte ***array2D, int rows, int columns);
int  get_mem2Dint (int ***array2D, int rows, int columns);
int  get_mem3D    (byte ****array2D, int frames, int rows, int columns);
int  get_mem3Dint (int ****array3D, int frames, int rows, int columns);
void no_mem_exit  (char *where);

int  get_mem_mv  (int******);
void free_mem_mv (int*****);
void free_img    ();

// Added for (re-) structuring the TML soft
int   encode_one_frame();
void  encode_one_slice(SyntaxElement *sym);
void  malloc_slice();
void  free_slice();
void  init_slice();
void  encode_one_macroblock();
void  start_macroblock();

void  terminate_macroblock(Boolean *end_of_slice, Boolean *recode_macroblock);
int   slice_too_big(int rlc_bits);
void  write_one_macroblock();
void  proceed2nextMacroblock();
void  LumaResidualCoding_P();
void  ChromaCoding_P(int *cr_cbp);
void  SetRefFrameInfo_P();
int   MakeIntraPrediction(int *intra_pred_mode_2);
void  CheckAvailabilityOfNeighbors();
int   writeMotionInfo2NAL_Pframe();
void  writeCBPandCoeffs2NAL();
int   writeSyntaxElement_UVLC(SyntaxElement *se, DataPartition *this_dataPart);
void  writeUVLC2buffer(SyntaxElement *se, Bitstream *currStream);
int   symbol2uvlc(SyntaxElement *se);
void  n_linfo(int n, int *len,int *info);
void  n_linfo2(int n, int dummy, int *len,int *info);
void  intrapred_linfo(int ipred1, int ipred2, int *len,int *info);
void  mvd_linfo2(int mvd, int dummy, int *len,int *info);
void  dquant_linfo(int mvd, int dummy, int *len,int *info);
void  cbp_linfo_intra(int cbp, int dummy, int *len,int *info);
void  cbp_linfo_inter(int cbp, int dummy, int *len,int *info);
#if TRACE
void  trace2out(SyntaxElement *se);
#endif
Boolean dummy_slice_too_big(int bits_slice);

// CABAC
void arienco_start_encoding(EncodingEnvironmentPtr eep, unsigned char *code_buffer, int *code_len );
int  arienco_bits_written(EncodingEnvironmentPtr eep);
void arienco_done_encoding(EncodingEnvironmentPtr eep);
void biari_init_context( BiContextTypePtr ctx, int ini_count_0, int ini_count_1, int max_cum_freq );
void biari_copy_context( BiContextTypePtr ctx_orig, BiContextTypePtr ctx_dest );
void biari_print_context( BiContextTypePtr ctx );
void rescale_cum_freq(BiContextTypePtr bi_ct);
void biari_encode_symbol(EncodingEnvironmentPtr eep, signed short symbol, BiContextTypePtr bi_ct );
MotionInfoContexts* create_contexts_MotionInfo(void);
TextureInfoContexts* create_contexts_TextureInfo(void);
void init_contexts_MotionInfo(MotionInfoContexts *enco_ctx, int ini_flag);
void init_contexts_TextureInfo(TextureInfoContexts *enco_ctx, int ini_flag);
void delete_contexts_MotionInfo(MotionInfoContexts *enco_ctx);
void delete_contexts_TextureInfo(TextureInfoContexts *enco_ctx);
void writeHeaderToBuffer();
void writeEOSToBuffer();
int  writeSyntaxElement_CABAC(SyntaxElement *se, DataPartition *this_dataPart);
void writeMB_typeInfo2Buffer_CABAC(SyntaxElement *se, EncodingEnvironmentPtr eep_dp);
void writeIntraPredMode2Buffer_CABAC(SyntaxElement *se, EncodingEnvironmentPtr eep_dp);
void writeRefFrame2Buffer_CABAC(SyntaxElement *se, EncodingEnvironmentPtr eep_dp);
void writeMVD2Buffer_CABAC(SyntaxElement *se, EncodingEnvironmentPtr eep_dp);
void writeCBP2Buffer_CABAC(SyntaxElement *se, EncodingEnvironmentPtr eep_dp);
void writeDquant_CABAC(SyntaxElement *se, EncodingEnvironmentPtr eep_dp);
void writeRunLevel2Buffer_CABAC(SyntaxElement *se, EncodingEnvironmentPtr eep_dp);
void writeBiDirBlkSize2Buffer_CABAC(SyntaxElement *se, EncodingEnvironmentPtr eep_dp);
void writeBiMVD2Buffer_CABAC(SyntaxElement *se, EncodingEnvironmentPtr eep_dp);

void error(char *text, int code);
int  start_sequence();
int  terminate_sequence();
int  start_slice(SyntaxElement *sym);
int  terminate_slice();

void DP_SliceHeader(FILE *out, int bytes_written, int part_nr);
void DP_PartHeader(FILE *out, int bytes_written, int part_nr);

// B pictures
void copy2mref();
int  motion_search_Bframe(int tot_intra_sad);
int  get_fwMV(int *min_fw_sad, int tot_intra_sad);
void get_bwMV(int *min_bw_sad);
void get_bid(int *bid_sad, int fw_predframe_no);
void get_dir(int *dir_sad);
void compare_sad(int tot_intra_sad, int fw_sad, int bw_sad, int bid_sad, int dir_sad);
void LumaResidualCoding_B();
void ChromaCoding_B(int *cr_cbp);
void SetRefFrameInfo_B();
int  writeMotionInfo2NAL_Bframe();
int  BlkSize2CodeNumber(int blc_size_h, int blc_size_v);

// Introduced for 1/8-pel
void interpolate_frame();
void interpolate_frame_2();
void oneeighthpix(int prior_B_frame);

void InitRefbuf ();
void InitMotionVectorSearchModule();

#endif


int   writeMB_bits_for_4x4_luma   (int, int, int);
int   writeMB_bits_for_16x16_luma ();
int   writeMB_bits_for_luma       (int);
int   writeMB_bits_for_DC_chroma  (int);
int   writeMB_bits_for_AC_chroma  (int);
int   writeMB_bits_for_CBP        ();
int   writeMB_bits_for_Dquant     ();
int   SingleUnifiedMotionSearch   (int, int, int**, int***, int*****, int, int*****, double);

//============= rate-distortion optimization ===================
void  clear_rdopt      ();
void  init_rdopt       ();
void  RD_Mode_Decision ();
//============= rate-distortion opt with packet losses ===========
void decode_one_macroblock();
void Get_Reference_Block(byte **imY, int block_y, int block_x, int mvhor, int mvver, byte **out);
byte Get_Reference_Pixel(byte **imY, int y, int x);
int Half_Upsample(byte **imY, int j, int i);
void DecOneForthPix(byte **dY, byte ***dref);
void compute_residue(int mode);
void UpdateDecoders();
void Build_Status_Map(byte **s_map);
void Error_Concealment(byte **inY, byte **s_map, byte ***refY);
void Conceal_Error(byte **inY, int mb_y, int mb_x, byte ***refY);

//============= fast full integer search =======================
#ifdef _FAST_FULL_ME_
void  InitializeFastFullIntegerSearch (int);
void  ClearFastFullIntegerSearch    ();
void  ResetFastFullIntegerSearch    ();
#endif