/*****************************************************************************
- * cabac.h: h264 encoder library
+ * cabac.h: arithmetic coder
*****************************************************************************
- * Copyright (C) 2003 Laurent Aimar
- * $Id: cabac.h,v 1.1 2004/06/03 19:27:06 fenrir Exp $
+ * Copyright (C) 2003-2016 x264 project
*
- * Authors: Laurent Aimar <fenrir@via.ecp.fr>
+ * 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
*
* 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.
+ * 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 _CABAC_H
-#define _CABAC_H 1
+#ifndef X264_CABAC_H
+#define X264_CABAC_H
typedef struct
{
- /* context */
- DECLARE_ALIGNED_16( uint8_t state[460] );
-
- int f8_bits_encoded; // only if using x264_cabac_size_decision()
-
/* state */
int i_low;
int i_range;
/* bit stream */
- int i_queue;
+ 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_16( 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;
+extern const uint8_t x264_cabac_transition[128][2];
+extern const uint16_t x264_cabac_entropy[128];
+
/* init the contexts given i_slice_type, the quantif and the model */
-void x264_cabac_context_init( x264_cabac_t *cb, int i_slice_type, int i_qp, int i_model );
+void x264_cabac_context_init( x264_t *h, x264_cabac_t *cb, int i_slice_type, int i_qp, int i_model );
-/* encoder only: */
+void x264_cabac_encode_init_core( x264_cabac_t *cb );
void x264_cabac_encode_init ( x264_cabac_t *cb, uint8_t *p_data, uint8_t *p_end );
-void x264_cabac_encode_decision( x264_cabac_t *cb, int i_ctx_idx, int b );
-void x264_cabac_encode_bypass( x264_cabac_t *cb, int b );
-void x264_cabac_encode_terminal( x264_cabac_t *cb );
+void x264_cabac_encode_decision_c( x264_cabac_t *cb, int i_ctx, int b );
+void x264_cabac_encode_decision_asm( x264_cabac_t *cb, int i_ctx, int b );
+void x264_cabac_encode_bypass_c( x264_cabac_t *cb, int b );
+void x264_cabac_encode_bypass_asm( x264_cabac_t *cb, int b );
+void x264_cabac_encode_terminal_c( x264_cabac_t *cb );
+void x264_cabac_encode_terminal_asm( x264_cabac_t *cb );
+void x264_cabac_encode_ue_bypass( x264_cabac_t *cb, int exp_bits, int val );
void x264_cabac_encode_flush( x264_t *h, x264_cabac_t *cb );
-/* internal only. these don't write the bitstream, just calculate bit cost: */
-void x264_cabac_size_decision( x264_cabac_t *cb, int i_ctx, int b );
-int x264_cabac_size_decision2( uint8_t *state, int b );
-int x264_cabac_size_decision_noup( uint8_t *state, int b );
+#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 inline int x264_cabac_pos( x264_cabac_t *cb )
+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
projects / x264 / blobdiff