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/*****************************************************************************
 * common.h: h264 encoder
 *****************************************************************************
 * Copyright (C) 2003 Laurent Aimar
 * $Id: common.h,v 1.1 2004/06/03 19:27:06 fenrir Exp $
 *
 * Authors: 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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

#ifndef _COMMON_H
#define _COMMON_H 1

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/****************************************************************************
 * Macros
 ****************************************************************************/
#define X264_MIN(a,b) ( (a)<(b) ? (a) : (b) )
#define X264_MAX(a,b) ( (a)>(b) ? (a) : (b) )
#define X264_MIN3(a,b,c) X264_MIN((a),X264_MIN((b),(c)))
#define X264_MAX3(a,b,c) X264_MAX((a),X264_MAX((b),(c)))
#define X264_MIN4(a,b,c,d) X264_MIN((a),X264_MIN3((b),(c),(d)))
#define X264_MAX4(a,b,c,d) X264_MAX((a),X264_MAX3((b),(c),(d)))
#define XCHG(type,a,b) { type t = a; a = b; b = t; }
#define FIX8(f) ((int)(f*(1<<8)+.5))

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#ifndef offsetof
#define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
#endif

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#define CHECKED_MALLOC( var, size )\
{\
    var = x264_malloc( size );\
    if( !var )\
    {\
        x264_log( h, X264_LOG_ERROR, "malloc failed\n" );\
        goto fail;\
    }\
}

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#define X264_BFRAME_MAX 16
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#define X264_THREAD_MAX 128
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#define X264_SLICE_MAX 4
#define X264_NAL_MAX (4 + X264_SLICE_MAX)
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// number of pixels (per thread) in progress at any given time.
// 16 for the macroblock in progress + 3 for deblocking + 3 for motion compensation filter + 2 for extra safety
#define X264_THREAD_HEIGHT 24
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/****************************************************************************
 * Includes
 ****************************************************************************/
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#include "osdep.h"
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#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
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#include "x264.h"
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#include "bs.h"
#include "set.h"
#include "predict.h"
#include "pixel.h"
#include "mc.h"
#include "frame.h"
#include "dct.h"
#include "cabac.h"
#include "csp.h"
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#include "quant.h"
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/****************************************************************************
 * Generals functions
 ****************************************************************************/
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/* x264_malloc : will do or emulate a memalign
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 * you have to use x264_free for buffers allocated with x264_malloc */
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void *x264_malloc( int );
void *x264_realloc( void *p, int i_size );
void  x264_free( void * );

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/* x264_slurp_file: malloc space for the whole file and read it */
char *x264_slurp_file( const char *filename );

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/* mdate: return the current date in microsecond */
int64_t x264_mdate( void );

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/* x264_param2string: return a (malloced) string containing most of
 * the encoding options */
char *x264_param2string( x264_param_t *p, int b_res );

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/* log */
void x264_log( x264_t *h, int i_level, const char *psz_fmt, ... );

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void x264_reduce_fraction( int *n, int *d );

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static inline int x264_clip3( int v, int i_min, int i_max )
{
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    return ( (v < i_min) ? i_min : (v > i_max) ? i_max : v );
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}

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static inline double x264_clip3f( double v, double f_min, double f_max )
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{
    return ( (v < f_min) ? f_min : (v > f_max) ? f_max : v );
}
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static inline int x264_median( int a, int b, int c )
{
    int min = a, max =a;
    if( b < min )
        min = b;
    else
        max = b;    /* no need to do 'b > max' (more consuming than always doing affectation) */

    if( c < min )
        min = c;
    else if( c > max )
        max = c;

    return a + b + c - min - max;
}


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/****************************************************************************
 *
 ****************************************************************************/
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enum slice_type_e
{
    SLICE_TYPE_P  = 0,
    SLICE_TYPE_B  = 1,
    SLICE_TYPE_I  = 2,
    SLICE_TYPE_SP = 3,
    SLICE_TYPE_SI = 4
};

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static const char slice_type_to_char[] = { 'P', 'B', 'I', 'S', 'S' };

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typedef struct
{
    x264_sps_t *sps;
    x264_pps_t *pps;

    int i_type;
    int i_first_mb;
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    int i_last_mb;
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    int i_pps_id;

    int i_frame_num;

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    int b_mbaff;
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    int b_field_pic;
    int b_bottom_field;

    int i_idr_pic_id;   /* -1 if nal_type != 5 */

    int i_poc_lsb;
    int i_delta_poc_bottom;

    int i_delta_poc[2];
    int i_redundant_pic_cnt;

    int b_direct_spatial_mv_pred;

    int b_num_ref_idx_override;
    int i_num_ref_idx_l0_active;
    int i_num_ref_idx_l1_active;

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    int b_ref_pic_list_reordering_l0;
    int b_ref_pic_list_reordering_l1;
    struct {
        int idc;
        int arg;
    } ref_pic_list_order[2][16];

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    int i_cabac_init_idc;

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    int i_qp;
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    int i_qp_delta;
    int b_sp_for_swidth;
    int i_qs_delta;

    /* deblocking filter */
    int i_disable_deblocking_filter_idc;
    int i_alpha_c0_offset;
    int i_beta_offset;

} x264_slice_header_t;

/* From ffmpeg
 */
#define X264_SCAN8_SIZE (6*8)
#define X264_SCAN8_0 (4+1*8)

static const int x264_scan8[16+2*4] =
{
    /* Luma */
    4+1*8, 5+1*8, 4+2*8, 5+2*8,
    6+1*8, 7+1*8, 6+2*8, 7+2*8,
    4+3*8, 5+3*8, 4+4*8, 5+4*8,
    6+3*8, 7+3*8, 6+4*8, 7+4*8,

    /* Cb */
    1+1*8, 2+1*8,
    1+2*8, 2+2*8,

    /* Cr */
    1+4*8, 2+4*8,
    1+5*8, 2+5*8,
};
/*
   0 1 2 3 4 5 6 7
 0
 1   B B   L L L L
 2   B B   L L L L
 3         L L L L
 4   R R   L L L L
 5   R R
*/

typedef struct x264_ratecontrol_t   x264_ratecontrol_t;
typedef struct x264_vlc_table_t     x264_vlc_table_t;

struct x264_t
{
    /* encoder parameters */
    x264_param_t    param;

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    x264_t          *thread[X264_THREAD_MAX];
    pthread_t       thread_handle;
    int             b_thread_active;
    int             i_thread_phase; /* which thread to use for the next frame */
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    /* bitstream output */
    struct
    {
        int         i_nal;
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        x264_nal_t  nal[X264_NAL_MAX];
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        int         i_bitstream;    /* size of p_bitstream */
        uint8_t     *p_bitstream;   /* will hold data for all nal */
        bs_t        bs;
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        int         i_frame_size;
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    } out;

    /* frame number/poc */
    int             i_frame;

    int             i_frame_offset; /* decoding only */
    int             i_frame_num;    /* decoding only */
    int             i_poc_msb;      /* decoding only */
    int             i_poc_lsb;      /* decoding only */
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    int             i_poc;          /* decoding only */
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    int             i_thread_num;   /* threads only */
    int             i_nal_type;     /* threads only */
    int             i_nal_ref_idc;  /* threads only */

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    /* We use only one SPS and one PPS */
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    x264_sps_t      sps_array[1];
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    x264_sps_t      *sps;
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    x264_pps_t      pps_array[1];
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    x264_pps_t      *pps;
    int             i_idr_pic_id;

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    /* quantization matrix for decoding, [cqm][qp%6][coef_y][coef_x] */
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    int             (*dequant4_mf[4])[4][4]; /* [4][6][4][4] */
    int             (*dequant8_mf[2])[8][8]; /* [2][6][8][8] */
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    /* quantization matrix for trellis, [cqm][qp][coef] */
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    int             (*unquant4_mf[4])[16];   /* [4][52][16] */
    int             (*unquant8_mf[2])[64];   /* [2][52][64] */
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    /* quantization matrix for deadzone */
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    uint16_t        (*quant4_mf[4])[16];     /* [4][52][16] */
    uint16_t        (*quant8_mf[2])[64];     /* [2][52][64] */
    uint16_t        (*quant4_bias[4])[16];   /* [4][52][16] */
    uint16_t        (*quant8_bias[2])[64];   /* [2][52][64] */
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    uint32_t        nr_residual_sum[2][64];
    uint32_t        nr_offset[2][64];
    uint32_t        nr_count[2];
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    /* Slice header */
    x264_slice_header_t sh;

    /* cabac context */
    x264_cabac_t    cabac;

    struct
    {
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        /* Frames to be encoded (whose types have been decided) */
        x264_frame_t *current[X264_BFRAME_MAX+3];
        /* Temporary buffer (frames types not yet decided) */
        x264_frame_t *next[X264_BFRAME_MAX+3];
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        /* Unused frames */
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        x264_frame_t *unused[X264_BFRAME_MAX + X264_THREAD_MAX*2 + 16+4];
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        /* For adaptive B decision */
        x264_frame_t *last_nonb;
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        /* frames used for reference + sentinels */
        x264_frame_t *reference[16+2];
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        int i_last_idr; /* Frame number of the last IDR */
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        int i_input;    /* Number of input frames already accepted */
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        int i_max_dpb;  /* Number of frames allocated in the decoded picture buffer */
        int i_max_ref0;
        int i_max_ref1;
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        int i_delay;    /* Number of frames buffered for B reordering */
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        int b_have_lowres;  /* Whether 1/2 resolution luma planes are being used */
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    } frames;

    /* current frame being encoded */
    x264_frame_t    *fenc;

    /* frame being reconstructed */
    x264_frame_t    *fdec;

    /* references lists */
    int             i_ref0;
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    x264_frame_t    *fref0[16+3];     /* ref list 0 */
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    int             i_ref1;
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    x264_frame_t    *fref1[16+3];     /* ref list 1 */
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    int             b_ref_reorder[2];
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    /* Current MB DCT coeffs */
    struct
    {
        DECLARE_ALIGNED( int, luma16x16_dc[16], 16 );
        DECLARE_ALIGNED( int, chroma_dc[2][4], 16 );
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        // FIXME merge with union
        DECLARE_ALIGNED( int, luma8x8[4][64], 16 );
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        union
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        {
            DECLARE_ALIGNED( int, residual_ac[15], 16 );
            DECLARE_ALIGNED( int, luma4x4[16], 16 );
        } block[16+8];
    } dct;

    /* MB table and cache for current frame/mb */
    struct
    {
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        int     i_mb_count;                 /* number of mbs in a frame */

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        /* Strides */
        int     i_mb_stride;
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        int     i_b8_stride;
        int     i_b4_stride;
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        /* Current index */
        int     i_mb_x;
        int     i_mb_y;
        int     i_mb_xy;
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        int     i_b8_xy;
        int     i_b4_xy;
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        /* Search parameters */
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        int     i_me_method;
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        int     i_subpel_refine;
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        int     b_chroma_me;
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        int     b_trellis;
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        int     b_noise_reduction;

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        int     b_interlaced;

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        /* Allowed qpel MV range to stay within the picture + emulated edge pixels */
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        int     mv_min[2];
        int     mv_max[2];
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        /* Subpel MV range for motion search.
         * same mv_min/max but includes levels' i_mv_range. */
        int     mv_min_spel[2];
        int     mv_max_spel[2];
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        /* Fullpel MV range for motion search */
        int     mv_min_fpel[2];
        int     mv_max_fpel[2];
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        /* neighboring MBs */
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        unsigned int i_neighbour;
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        unsigned int i_neighbour8[4];       /* neighbours of each 8x8 or 4x4 block that are available */
        unsigned int i_neighbour4[16];      /* at the time the block is coded */
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        int     i_mb_type_top; 
        int     i_mb_type_left; 
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        int     i_mb_type_topleft; 
        int     i_mb_type_topright; 
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        int     i_mb_prev_xy;
        int     i_mb_top_xy;
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        /* mb table */
        int8_t  *type;                      /* mb type */
        int8_t  *qp;                        /* mb qp */
        int16_t *cbp;                       /* mb cbp: 0x0?: luma, 0x?0: chroma, 0x100: luma dc, 0x0200 and 0x0400: chroma dc  (all set for PCM)*/
        int8_t  (*intra4x4_pred_mode)[7];   /* intra4x4 pred mode. for non I4x4 set to I_PRED_4x4_DC(2) */
        uint8_t (*non_zero_count)[16+4+4];  /* nzc. for I_PCM set to 16 */
        int8_t  *chroma_pred_mode;          /* chroma_pred_mode. cabac only. for non intra I_PRED_CHROMA_DC(0) */
        int16_t (*mv[2])[2];                /* mb mv. set to 0 for intra mb */
        int16_t (*mvd[2])[2];               /* mb mv difference with predict. set to 0 if intra. cabac only */
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        int8_t   *ref[2];                   /* mb ref. set to -1 if non used (intra or Lx only) */
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        int16_t (*mvr[2][32])[2];           /* 16x16 mv for each possible ref */
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        int8_t  *skipbp;                    /* block pattern for SKIP or DIRECT (sub)mbs. B-frames + cabac only */
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        int8_t  *mb_transform_size;         /* transform_size_8x8_flag of each mb */
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        uint8_t *intra_border_backup[2][3]; /* bottom pixels of the previous mb row, used for intra prediction after the framebuffer has been deblocked */
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        uint8_t (*nnz_backup)[16];          /* when using cavlc + 8x8dct, the deblocker uses a modified nnz */
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        /* current value */
        int     i_type;
        int     i_partition;
        int     i_sub_partition[4];
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        int     b_transform_8x8;
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        int     i_cbp_luma;
        int     i_cbp_chroma;

        int     i_intra16x16_pred_mode;
        int     i_chroma_pred_mode;

        struct
        {
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            /* space for p_fenc and p_fdec */
#define FENC_STRIDE 16
#define FDEC_STRIDE 32
            DECLARE_ALIGNED( uint8_t, fenc_buf[24*FENC_STRIDE], 16 );
            DECLARE_ALIGNED( uint8_t, fdec_buf[27*FDEC_STRIDE], 16 );

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            /* pointer over mb of the frame to be compressed */
            uint8_t *p_fenc[3];

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            /* pointer over mb of the frame to be reconstructed  */
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            uint8_t *p_fdec[3];

            /* pointer over mb of the references */
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            int i_fref[2];
            uint8_t *p_fref[2][32][4+2]; /* last: lN, lH, lV, lHV, cU, cV */
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            uint16_t *p_integral[2][16];
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            /* fref stride */
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            int     i_stride[3];
        } pic;

        /* cache */
        struct
        {
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            /* real intra4x4_pred_mode if I_4X4 or I_8X8, I_PRED_4x4_DC if mb available, -1 if not */
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            int     intra4x4_pred_mode[X264_SCAN8_SIZE];

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            /* i_non_zero_count if available else 0x80 */
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            int     non_zero_count[X264_SCAN8_SIZE];

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            /* -1 if unused, -2 if unavailable */
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            int8_t  ref[2][X264_SCAN8_SIZE];

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            /* 0 if not available */
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            int16_t mv[2][X264_SCAN8_SIZE][2];
            int16_t mvd[2][X264_SCAN8_SIZE][2];
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            /* 1 if SKIP or DIRECT. set only for B-frames + CABAC */
            int8_t  skip[X264_SCAN8_SIZE];

            int16_t direct_mv[2][X264_SCAN8_SIZE][2];
            int8_t  direct_ref[2][X264_SCAN8_SIZE];
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            int     pskip_mv[2];
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            /* number of neighbors (top and left) that used 8x8 dct */
            int     i_neighbour_transform_size;
            int     b_transform_8x8_allowed;
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            int     i_neighbour_interlaced;
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        } cache;

        /* */
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        int     i_qp;       /* current qp */
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        int     i_chroma_qp;
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        int     i_last_qp;  /* last qp */
        int     i_last_dqp; /* last delta qp */
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        int     b_variable_qp; /* whether qp is allowed to vary per macroblock */
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        int     b_lossless;
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        int     b_direct_auto_read; /* take stats for --direct auto from the 2pass log */
        int     b_direct_auto_write; /* analyse direct modes, to use and/or save */
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        /* B_direct and weighted prediction */
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        int     dist_scale_factor[16][2];
        int     bipred_weight[32][4];
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        /* maps fref1[0]'s ref indices into the current list0 */
        int     map_col_to_list0_buf[2]; // for negative indices
        int     map_col_to_list0[16];
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    } mb;

    /* rate control encoding only */
    x264_ratecontrol_t *rc;

    /* stats */
    struct
    {
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        /* Current frame stats */
        struct
        {
            /* Headers bits (MV+Ref+MB Block Type */
            int i_hdr_bits;
            /* Texture bits (Intra/Predicted) */
            int i_itex_bits;
            int i_ptex_bits;
            /* ? */
            int i_misc_bits;
            /* MB type counts */
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            int i_mb_count[19];
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            int i_mb_count_i;
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            int i_mb_count_p;
            int i_mb_count_skip;
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            int i_mb_count_8x8dct[2];
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            int i_mb_count_size[7];
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            int i_mb_count_ref[32];
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            /* Estimated (SATD) cost as Intra/Predicted frame */
            /* XXX: both omit the cost of MBs coded as P_SKIP */
            int i_intra_cost;
            int i_inter_cost;
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            int i_mbs_analysed;
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            /* Adaptive direct mv pred */
            int i_direct_score[2];
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        } frame;

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        /* Cumulated stats */
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        /* per slice info */
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        int     i_slice_count[5];
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        int64_t i_slice_size[5];
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        int     i_slice_qp[5];
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        /* */
        int64_t i_sqe_global[5];
        float   f_psnr_average[5];
        float   f_psnr_mean_y[5];
        float   f_psnr_mean_u[5];
        float   f_psnr_mean_v[5];
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        float   f_ssim_mean_y[5];
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        /* */
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        int64_t i_mb_count[5][19];
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        int64_t i_mb_count_8x8dct[2];
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        int64_t i_mb_count_size[2][7];
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        int64_t i_mb_count_ref[2][32];
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        /* */
        int     i_direct_score[2];
        int     i_direct_frames[2];
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    } stat;

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    /* CPU functions dependents */
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    x264_predict_t      predict_16x16[4+3];
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    x264_predict_t      predict_8x8c[4+3];
    x264_predict8x8_t   predict_8x8[9+3];
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    x264_predict_t      predict_4x4[9+3];

    x264_pixel_function_t pixf;
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    x264_mc_functions_t   mc;
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    x264_dct_function_t   dctf;
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    x264_zigzag_function_t zigzagf;
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    x264_csp_function_t   csp;
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    x264_quant_function_t quantf;
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    x264_deblock_function_t loopf;
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    /* vlc table for decoding purpose only */
    x264_vlc_table_t *x264_coeff_token_lookup[5];
    x264_vlc_table_t *x264_level_prefix_lookup;
    x264_vlc_table_t *x264_total_zeros_lookup[15];
    x264_vlc_table_t *x264_total_zeros_dc_lookup[3];
    x264_vlc_table_t *x264_run_before_lookup[7];
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#if VISUALIZE
    struct visualize_t *visualize;
#endif
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};

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// included at the end because it needs x264_t
#include "macroblock.h"

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#endif