common.h.svn-base

现在关于h.264的源码很多

/*****************************************************************************
 * 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 <[e-mail]>
 *
 * 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

#ifdef HAVE_STDINT_H
#include <stdint.h>
#else
#include <inttypes.h>
#endif
#include <stdarg.h>

#ifdef _MSC_VER
#define snprintf _snprintf
#define X264_VERSION "" // no configure script for msvc
#endif

/****************************************************************************
 * 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))

/****************************************************************************
 * Includes
 ****************************************************************************/
#include "x264.h"
#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"
#include "quant.h"

/****************************************************************************
 * Generals functions
 ****************************************************************************/
/* x264_malloc : will do or emulate a memalign
 * XXX you HAVE TO use x264_free for buffer allocated
 * with x264_malloc
 */
void *x264_malloc( int );
void *x264_realloc( void *p, int i_size );
void  x264_free( void * );

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

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

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

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

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

static inline float x264_clip3f( float v, float f_min, float f_max )
{
    return ( (v < f_min) ? f_min : (v > f_max) ? f_max : v );
}

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;
}


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

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

typedef struct
{
    x264_sps_t *sps;
    x264_pps_t *pps;

    int i_type;
    int i_first_mb;
    int i_last_mb;

    int i_pps_id;

    int i_frame_num;

    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;

    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];

    int i_cabac_init_idc;

    int i_qp;
    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
*/

#define X264_BFRAME_MAX 16
#define X264_SLICE_MAX 4
#define X264_NAL_MAX (4 + X264_SLICE_MAX)

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;

    x264_t *thread[X264_SLICE_MAX];

    /* bitstream output */
    struct
    {
        int         i_nal;
        x264_nal_t  nal[X264_NAL_MAX];
        int         i_bitstream;    /* size of p_bitstream */
        uint8_t     *p_bitstream;   /* will hold data for all nal */
        bs_t        bs;
    } 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 */
    int             i_poc;          /* decoding only */

    int             i_thread_num;   /* threads only */
    int             i_nal_type;     /* threads only */
    int             i_nal_ref_idc;  /* threads only */

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

    int             dequant4_mf[4][6][4][4];
    int             dequant8_mf[2][6][8][8];
    int             quant4_mf[4][6][4][4];
    int             quant8_mf[2][6][8][8];
    int             unquant4_mf[4][52][16];
    int             unquant8_mf[2][52][64];

    /* Slice header */
    x264_slice_header_t sh;