123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126 |
- /*****************************************************************************
- * cabac.h: arithmetic coder
- *****************************************************************************
- * Copyright (C) 2003-2018 x264 project
- *
- * Authors: Loren Merritt <lorenm@u.washington.edu>
- * Laurent Aimar <fenrir@via.ecp.fr>
- *
- * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
- *
- * This program is also available under a commercial proprietary license.
- * For more information, contact us at licensing@x264.com.
- *****************************************************************************/
- #ifndef X264_CABAC_H
- #define X264_CABAC_H
- typedef struct
- {
- /* state */
- int i_low;
- int i_range;
- /* bit stream */
- int i_queue; //stored with an offset of -8 for faster asm
- int i_bytes_outstanding;
- uint8_t *p_start;
- uint8_t *p;
- uint8_t *p_end;
- /* aligned for memcpy_aligned starting here */
- ALIGNED_64( int f8_bits_encoded ); // only if using x264_cabac_size_decision()
- /* context */
- uint8_t state[1024];
- /* for 16-byte alignment */
- uint8_t padding[12];
- } x264_cabac_t;
- /* init the contexts given i_slice_type, the quantif and the model */
- #define x264_cabac_context_init x264_template(cabac_context_init)
- void x264_cabac_context_init( x264_t *h, x264_cabac_t *cb, int i_slice_type, int i_qp, int i_model );
- #define x264_cabac_encode_init_core x264_template(cabac_encode_init_core)
- void x264_cabac_encode_init_core( x264_cabac_t *cb );
- #define x264_cabac_encode_init x264_template(cabac_encode_init)
- void x264_cabac_encode_init( x264_cabac_t *cb, uint8_t *p_data, uint8_t *p_end );
- #define x264_cabac_encode_decision_c x264_template(cabac_encode_decision_c)
- void x264_cabac_encode_decision_c( x264_cabac_t *cb, int i_ctx, int b );
- #define x264_cabac_encode_decision_asm x264_template(cabac_encode_decision_asm)
- void x264_cabac_encode_decision_asm( x264_cabac_t *cb, int i_ctx, int b );
- #define x264_cabac_encode_bypass_c x264_template(cabac_encode_bypass_c)
- void x264_cabac_encode_bypass_c( x264_cabac_t *cb, int b );
- #define x264_cabac_encode_bypass_asm x264_template(cabac_encode_bypass_asm)
- void x264_cabac_encode_bypass_asm( x264_cabac_t *cb, int b );
- #define x264_cabac_encode_terminal_c x264_template(cabac_encode_terminal_c)
- void x264_cabac_encode_terminal_c( x264_cabac_t *cb );
- #define x264_cabac_encode_terminal_asm x264_template(cabac_encode_terminal_asm)
- void x264_cabac_encode_terminal_asm( x264_cabac_t *cb );
- #define x264_cabac_encode_ue_bypass x264_template(cabac_encode_ue_bypass)
- void x264_cabac_encode_ue_bypass( x264_cabac_t *cb, int exp_bits, int val );
- #define x264_cabac_encode_flush x264_template(cabac_encode_flush)
- void x264_cabac_encode_flush( x264_t *h, x264_cabac_t *cb );
- #if HAVE_MMX
- #define x264_cabac_encode_decision x264_cabac_encode_decision_asm
- #define x264_cabac_encode_bypass x264_cabac_encode_bypass_asm
- #define x264_cabac_encode_terminal x264_cabac_encode_terminal_asm
- #elif defined(ARCH_AARCH64)
- #define x264_cabac_encode_decision x264_cabac_encode_decision_asm
- #define x264_cabac_encode_bypass x264_cabac_encode_bypass_asm
- #define x264_cabac_encode_terminal x264_cabac_encode_terminal_asm
- #else
- #define x264_cabac_encode_decision x264_cabac_encode_decision_c
- #define x264_cabac_encode_bypass x264_cabac_encode_bypass_c
- #define x264_cabac_encode_terminal x264_cabac_encode_terminal_c
- #endif
- #define x264_cabac_encode_decision_noup x264_cabac_encode_decision
- static ALWAYS_INLINE int x264_cabac_pos( x264_cabac_t *cb )
- {
- return (cb->p - cb->p_start + cb->i_bytes_outstanding) * 8 + cb->i_queue;
- }
- /* internal only. these don't write the bitstream, just calculate bit cost: */
- static ALWAYS_INLINE void x264_cabac_size_decision( x264_cabac_t *cb, long i_ctx, long b )
- {
- int i_state = cb->state[i_ctx];
- cb->state[i_ctx] = x264_cabac_transition[i_state][b];
- cb->f8_bits_encoded += x264_cabac_entropy[i_state^b];
- }
- static ALWAYS_INLINE int x264_cabac_size_decision2( uint8_t *state, long b )
- {
- int i_state = *state;
- *state = x264_cabac_transition[i_state][b];
- return x264_cabac_entropy[i_state^b];
- }
- static ALWAYS_INLINE void x264_cabac_size_decision_noup( x264_cabac_t *cb, long i_ctx, long b )
- {
- int i_state = cb->state[i_ctx];
- cb->f8_bits_encoded += x264_cabac_entropy[i_state^b];
- }
- static ALWAYS_INLINE int x264_cabac_size_decision_noup2( uint8_t *state, long b )
- {
- return x264_cabac_entropy[*state^b];
- }
- #endif
|