📄 vpar_blocks.h
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/***************************************************************************** * vpar_blocks.h : video parser blocks management ***************************************************************************** * Copyright (C) 1999, 2000 VideoLAN * * Authors: * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. *****************************************************************************//***************************************************************************** * Requires: * "config.h" * "common.h" * "mtime.h" * "threads.h" * "input.h" * "video.h" * "video_output.h" * "decoder_fifo.h" * "video_fifo.h" *****************************************************************************//***************************************************************************** * macroblock_t : information on a macroblock passed to the video_decoder * thread *****************************************************************************/typedef struct macroblock_s{ picture_t * p_picture; /* current frame in progress */ int i_mb_type; /* macroblock type */ int i_coded_block_pattern; /* which blocks are coded ? */ int i_chroma_nb_blocks; /* number of blocks for * chroma components */ /* IDCT information */ dctelem_t ppi_blocks[12][64]; /* blocks */ f_idct_t pf_idct[12]; /* sparse IDCT or not ? */ int pi_sparse_pos[12]; /* position of the * non-NULL coeff */ /* Motion compensation information */ f_motion_t pf_motion; /* function to use for motion comp */ picture_t * p_backward; /* backward reference frame */ picture_t * p_forward; /* forward reference frame */ int ppi_field_select[2][2]; /* field to use to * form predictions */ int pppi_motion_vectors[2][2][2]; /* motion vectors */ int ppi_dmv[2][2]; /* differential motion vectors */ /* coordinates of the block in the picture */ int i_l_x, i_c_x; int i_motion_l_y; int i_motion_c_y; int i_l_stride; /* number of yuv_data_t to * ignore when changing line */ int i_c_stride; /* idem, for chroma */ boolean_t b_P_second; /* Second field of a P picture ? * (used to determine the predicting * frame) */ boolean_t b_motion_field; /* Field we are predicting * (top field or bottom field) */ /* AddBlock information */ yuv_data_t * p_data[12]; /* pointer to the position * in the final picture */ int i_addb_l_stride, i_addb_c_stride; /* nb of coeffs to jump when changing lines */} macroblock_t;/***************************************************************************** * macroblock_parsing_t : macroblock context & predictors *****************************************************************************/typedef struct{ unsigned char i_quantizer_scale; /* scale of the quantization * matrices */ int pi_dc_dct_pred[3]; /* ISO/IEC 13818-2 7.2.1 */ int pppi_pmv[2][2][2]; /* Motion vect predictors, 7.6.3 */ /* Context used to optimize block parsing */ int i_motion_type, i_mv_count, i_mv_format; boolean_t b_dmv, b_dct_type; /* Coordinates of the upper-left pixel of the macroblock, in lum and * chroma */ int i_l_x, i_l_y, i_c_x, i_c_y;} macroblock_parsing_t;/***************************************************************************** * lookup_t : entry type for lookup tables * *****************************************************************************/typedef struct lookup_s{ int i_value; int i_length;} lookup_t;/***************************************************************************** * ac_lookup_t : special entry type for lookup tables about ac coefficients *****************************************************************************/typedef struct dct_lookup_s{ char i_run; char i_level; char i_length;} dct_lookup_t;/***************************************************************************** * Standard codes *****************************************************************************//* Macroblock types */#define MB_INTRA 1#define MB_PATTERN 2#define MB_MOTION_BACKWARD 4#define MB_MOTION_FORWARD 8#define MB_QUANT 16/* Motion types */#define MOTION_FIELD 1#define MOTION_FRAME 2#define MOTION_16X8 2#define MOTION_DMV 3/* Macroblock Address Increment types */#define MB_ADDRINC_ESCAPE 8#define MB_ADDRINC_STUFFING 15/* Error constant for lookup tables */#define MB_ERROR (-1)/* Scan */#define SCAN_ZIGZAG 0#define SCAN_ALT 1/* Constant for block decoding */#define DCT_EOB 64#define DCT_ESCAPE 65/***************************************************************************** * Constants *****************************************************************************/extern int pi_default_intra_quant[];extern int pi_default_nonintra_quant[];extern u8 pi_scan[2][64];/***************************************************************************** * Prototypes *****************************************************************************/void vpar_InitCrop( struct vpar_thread_s* p_vpar );void vpar_InitMbAddrInc( struct vpar_thread_s * p_vpar );void vpar_InitPMBType( struct vpar_thread_s * p_vpar );void vpar_InitBMBType( struct vpar_thread_s * p_vpar );void vpar_InitCodedPattern( struct vpar_thread_s * p_vpar );void vpar_InitDCTTables( struct vpar_thread_s * p_vpar );void vpar_PictureDataGENERIC( struct vpar_thread_s * p_vpar, int i_mb_base );#if (VPAR_OPTIM_LEVEL > 0)void vpar_PictureData2I420F0( struct vpar_thread_s * p_vpar, int i_mb_base );void vpar_PictureData2P420F0( struct vpar_thread_s * p_vpar, int i_mb_base );void vpar_PictureData2B420F0( struct vpar_thread_s * p_vpar, int i_mb_base );#endif#if (VPAR_OPTIM_LEVEL > 1)void vpar_PictureData2I420TZ( struct vpar_thread_s * p_vpar, int i_mb_base );void vpar_PictureData2P420TZ( struct vpar_thread_s * p_vpar, int i_mb_base );void vpar_PictureData2B420TZ( struct vpar_thread_s * p_vpar, int i_mb_base );void vpar_PictureData2I420BZ( struct vpar_thread_s * p_vpar, int i_mb_base );void vpar_PictureData2P420BZ( struct vpar_thread_s * p_vpar, int i_mb_base );void vpar_PictureData2B420BZ( struct vpar_thread_s * p_vpar, int i_mb_base );#endif⌨️ 快捷键说明
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