diff options
Diffstat (limited to 'encoder/ih264e_cabac_structs.h')
| -rw-r--r-- | encoder/ih264e_cabac_structs.h | 171 |
1 files changed, 105 insertions, 66 deletions
diff --git a/encoder/ih264e_cabac_structs.h b/encoder/ih264e_cabac_structs.h index 82938ca..bc6ba98 100644 --- a/encoder/ih264e_cabac_structs.h +++ b/encoder/ih264e_cabac_structs.h @@ -19,45 +19,52 @@ */ /** - ******************************************************************************* - * @file - * ih264e_cabac_structs.h - * - * @brief - * This file contains cabac related structure definitions. - * - * @author - * Doney Alex - * - * @remarks - * none - * - ******************************************************************************* - */ +******************************************************************************* +* @file +* ih264e_cabac_structs.h +* +* @brief +* This file contains structure definitions necessary for cabac encoding +* +* @author +* ittiam +* +* @remarks +* none +* +******************************************************************************* +*/ -#ifndef IH264E_CABAC_STRUCTS_H_ -#define IH264E_CABAC_STRUCTS_H_ +#ifndef _IH264E_CABAC_STRUCTS_H_ +#define _IH264E_CABAC_STRUCTS_H_ +/*****************************************************************************/ +/* Constant Macros */ +/*****************************************************************************/ #define CABAC_INIT_IDC 2 +/*****************************************************************************/ +/* Structures */ +/*****************************************************************************/ + /** - ****************************************************************************** - * @brief typedef for context model - ****************************************************************************** - */ +******************************************************************************* +* @brief typedef for context model +******************************************************************************* +*/ /* bits 0 to 5 :state bit 6 :mps */ typedef UWORD8 bin_ctxt_model; /** - ****************************************************************************** - * @brief MB info for cabac - ****************************************************************************** - */ +******************************************************************************* +* @brief MB info for cabac +******************************************************************************* +*/ typedef struct { /* Neighbour availability Variables needed to get CtxtInc, for CABAC */ @@ -72,6 +79,7 @@ typedef struct /* CSBP: V1 V0 U1 U0 Y3 Y2 Y1 Y0 */ /*************************************************************************/ UWORD8 u1_yuv_ac_csbp; + /*************************************************************************/ /* Arrangnment of DC CSBP */ /* bits: b7 b6 b5 b4 b3 b2 b1 b0 */ @@ -81,14 +89,15 @@ typedef struct WORD8 i1_ref_idx[4]; UWORD8 u1_mv[4][4]; + } mb_info_ctxt_t; /** - ****************************************************************************** - * @brief CSBP info for CABAC - ****************************************************************************** - */ +******************************************************************************* +* @brief CSBP info for CABAC +******************************************************************************* +*/ typedef struct { /*************************************************************************/ @@ -123,47 +132,56 @@ typedef struct /*************************************************************************/ UWORD8 u1_yuv_dc_csbp_top_mb; UWORD8 u1_yuv_dc_csbp_bot_mb; + } cab_csbp_t; /** - ****************************************************************************** - * @brief CABAC Encoding Environment - ****************************************************************************** - */ - +******************************************************************************* +* @brief CABAC Encoding Environment +******************************************************************************* +*/ typedef struct { - /** cabac interval start L */ + /** + * cabac interval start L + */ UWORD32 u4_code_int_low; - /** cabac interval range R */ + /** + * cabac interval range R + */ UWORD32 u4_code_int_range; /** bytes_outsanding; number of 0xFF bits that occur during renorm - * These will be accumulated till the carry bit is knwon - */ + * These will be accumulated till the carry bit is knwon + */ UWORD32 u4_out_standing_bytes; /** bits generated during renormalization - * A byte is put to stream/u4_out_standing_bytes from u4_low(L) when - * u4_bits_gen exceeds 8 - */ + * A byte is put to stream/u4_out_standing_bytes from u4_low(L) when + * u4_bits_gen exceeds 8 + */ UWORD32 u4_bits_gen; + } encoding_envirnoment_t; /** - ****************************************************************************** - * @brief CABAC Context structure : Variables to handle Cabac - ****************************************************************************** - */ +******************************************************************************* +* @brief CABAC Context structure : Variables to handle Cabac +******************************************************************************* +*/ typedef struct { - /* Base pointer to all the cabac contexts */ + /** + * Base pointer to all the cabac contexts + */ bin_ctxt_model au1_cabac_ctxt_table[NUM_CABAC_CTXTS]; - + /** + * left csbp + */ cab_csbp_t s_lft_csbp; /** @@ -171,51 +189,72 @@ typedef struct */ bitstrm_t *ps_bitstrm; - /* Pointer to mb_info_ctxt_t map_base */ + /** + * Pointer to mb_info_ctxt_t map_base + */ mb_info_ctxt_t *ps_mb_map_ctxt_inc_base; - /* Pointer to encoding_envirnoment_t */ + /** + * Pointer to encoding_envirnoment_t + */ encoding_envirnoment_t s_cab_enc_env; /* These things need to be updated at each MbLevel */ + /** + * Prev mb_qp_delta_ctxt + */ + WORD8 i1_prev_mb_qp_delta_ctxt; - /* Prev ps_mb_qp_delta_ctxt */ - WORD8 i1_prevps_mb_qp_delta_ctxt; - - /* Pointer to mb_info_ctxt_t map */ + /** + * Pointer to mb_info_ctxt_t map + */ mb_info_ctxt_t *ps_mb_map_ctxt_inc; - /* Pointer to default mb_info_ctxt_t */ + /** + * Pointer to default mb_info_ctxt_t + */ mb_info_ctxt_t *ps_def_ctxt_mb_info; - /* Pointer to current mb_info_ctxt_t */ + /** + * Pointer to current mb_info_ctxt_t + */ mb_info_ctxt_t *ps_curr_ctxt_mb_info; - /* Pointer to left mb_info_ctxt_t */ + /** + * Pointer to left mb_info_ctxt_t + */ mb_info_ctxt_t *ps_left_ctxt_mb_info; - /* Pointer to top mb_info_ctxt_t */ + /** + * Pointer to top mb_info_ctxt_t + */ mb_info_ctxt_t *ps_top_ctxt_mb_info; - /* Poniter to left csbp structure */ + /** + * Pointer to csbp structures + */ cab_csbp_t *ps_lft_csbp; UWORD8 *pu1_left_y_ac_csbp; UWORD8 *pu1_left_uv_ac_csbp; UWORD8 *pu1_left_yuv_dc_csbp; - /***************************************************************************/ - /* Ref_idx contexts are stored in the following way */ - /* Array Idx 0,1 for reference indices in Forward direction */ - /* Array Idx 2,3 for reference indices in backward direction */ - /***************************************************************************/ - /* Dimensions for u1_left_ref_ctxt_inc_arr is [2][4] for Mbaff:Top and Bot */ + /**************************************************************************/ + /* Ref_idx contexts are stored in the following way */ + /* Array Idx 0,1 for reference indices in Forward direction */ + /* Array Idx 2,3 for reference indices in backward direction */ + /**************************************************************************/ + /** + * Dimensions for u1_left_ref_ctxt_inc_arr is [2][4] for Mbaff:Top and Bot + */ WORD8 i1_left_ref_idx_ctx_inc_arr[2][4]; WORD8 *pi1_left_ref_idx_ctxt_inc; - /* Dimensions for u1_left_mv_ctxt_inc_arr is [2][4][4] for Mbaff case */ + /** + * Dimensions for u1_left_mv_ctxt_inc_arr is [2][4][4] for Mbaff case + */ UWORD8 u1_left_mv_ctxt_inc_arr[2][4][4]; UWORD8 (*pu1_left_mv_ctxt_inc)[4]; } cabac_ctxt_t; -#endif /* IH264E_CABAC_STRUCTS_H_ */ +#endif /* _IH264E_CABAC_STRUCTS_H_ */ |