x264.h

X264的纯C语言的的原码

        int          i_me_range; /* integer pixel motion estimation search range (from predicted mv) */
        int          i_mv_range; /* maximum length of a mv (in pixels) */
        int          i_subpel_refine; /* subpixel motion estimation quality */
        int          b_bidir_me; /* jointly optimize both MVs in B-frames */
        int          b_chroma_me; /* chroma ME for subpel and mode decision in P-frames */
        int          b_bframe_rdo; /* RD based mode decision for B-frames */
        int          b_mixed_references; /* allow each mb partition in P-frames to have it's own reference number */
        int          i_trellis;  /* trellis RD quantization */
        int          b_fast_pskip; /* early SKIP detection on P-frames */
        int          b_dct_decimate; /* transform coefficient thresholding on P-frames */
        int          i_noise_reduction; /* adaptive pseudo-deadzone */

        int          b_psnr;    /* Do we compute PSNR stats (save a few % of cpu) */
    } analyse;

    /* Rate control parameters */
    struct
    {
        int         i_rc_method;    /* X264_RC_* */

        int         i_qp_constant;  /* 0-51 */
        int         i_qp_min;       /* min allowed QP value */
        int         i_qp_max;       /* max allowed QP value */
        int         i_qp_step;      /* max QP step between frames */

        int         i_bitrate;
        int         i_rf_constant;  /* 1pass VBR, nominal QP */
        float       f_rate_tolerance;
        int         i_vbv_max_bitrate;
        int         i_vbv_buffer_size;
        float       f_vbv_buffer_init;
        float       f_ip_factor;
        float       f_pb_factor;

        /* 2pass */
        int         b_stat_write;   /* Enable stat writing in psz_stat_out */
        char        *psz_stat_out;
        int         b_stat_read;    /* Read stat from psz_stat_in and use it */
        char        *psz_stat_in;

        /* 2pass params (same as ffmpeg ones) */
        char        *psz_rc_eq;     /* 2 pass rate control equation */
        float       f_qcompress;    /* 0.0 => cbr, 1.0 => constant qp */
        float       f_qblur;        /* temporally blur quants */
        float       f_complexity_blur; /* temporally blur complexity */
        x264_zone_t *zones;         /* ratecontrol overrides */
        int         i_zones;        /* sumber of zone_t's */
        char        *psz_zones;     /* alternate method of specifying zones */
    } rc;

    /* Muxing parameters */
    int b_aud;                  /* generate access unit delimiters */
    int b_repeat_headers;       /* put SPS/PPS before each keyframe */
    int i_sps_id;               /* SPS and PPS id number */
} x264_param_t;

typedef struct {
    int level_idc;
    int mbps;        // max macroblock processing rate (macroblocks/sec)
    int frame_size;  // max frame size (macroblocks)
    int dpb;         // max decoded picture buffer (bytes)
    int bitrate;     // max bitrate (kbit/sec)
    int cpb;         // max vbv buffer (kbit)
    int mv_range;    // max vertical mv component range (pixels)
    int mvs_per_2mb; // max mvs per 2 consecutive mbs.
    int slice_rate;  // ??
    int bipred8x8;   // limit bipred to >=8x8
    int direct8x8;   // limit b_direct to >=8x8
    int frame_only;  // forbid interlacing
} x264_level_t;

/* all of the levels defined in the standard, terminated by .level_idc=0 */
extern const x264_level_t x264_levels[];

/* x264_param_default:
 *      fill x264_param_t with default values and do CPU detection */
void    x264_param_default( x264_param_t * );

/* x264_param_parse:
 *      set one parameter by name.
 *      returns 0 on success, or returns one of the following errors.
 *      note: bad value occurs only if it can't even parse the value,
 *      numerical range is not checked until x264_encoder_open() or x264_encoder_reconfig(). */
#define X264_PARAM_BAD_NAME  (-1)
#define X264_PARAM_BAD_VALUE (-2)
int x264_param_parse( x264_param_t *, const char *name, const char *value );

/****************************************************************************
 * Picture structures and functions.
 ****************************************************************************/
typedef struct
{
    int     i_csp;

    int     i_plane;
    int     i_stride[4];
    uint8_t *plane[4];
} x264_image_t;

typedef struct
{
    /* In: force picture type (if not auto) XXX: ignored for now
     * Out: type of the picture encoded */
    int     i_type;
    /* In: force quantizer for > 0 */
    int     i_qpplus1;
    /* In: user pts, Out: pts of encoded picture (user)*/
    int64_t i_pts;

    /* In: raw data */
    x264_image_t img;
} x264_picture_t;

/* x264_picture_alloc:
 *  alloc data for a picture. You must call x264_picture_clean on it. */
void x264_picture_alloc( x264_picture_t *pic, int i_csp, int i_width, int i_height );

/* x264_picture_clean:
 *  free associated resource for a x264_picture_t allocated with
 *  x264_picture_alloc ONLY */
void x264_picture_clean( x264_picture_t *pic );

/****************************************************************************
 * NAL structure and functions:
 ****************************************************************************/
/* nal */
enum nal_unit_type_e
{
    NAL_UNKNOWN = 0,
    NAL_SLICE   = 1,
    NAL_SLICE_DPA   = 2,
    NAL_SLICE_DPB   = 3,
    NAL_SLICE_DPC   = 4,
    NAL_SLICE_IDR   = 5,    /* ref_idc != 0 */
    NAL_SEI         = 6,    /* ref_idc == 0 */
    NAL_SPS         = 7,
    NAL_PPS         = 8,
    NAL_AUD         = 9,
    /* ref_idc == 0 for 6,9,10,11,12 */
};
enum nal_priority_e
{
    NAL_PRIORITY_DISPOSABLE = 0,
    NAL_PRIORITY_LOW        = 1,
    NAL_PRIORITY_HIGH       = 2,
    NAL_PRIORITY_HIGHEST    = 3,
};

typedef struct
{
    int i_ref_idc;  /* nal_priority_e */
    int i_type;     /* nal_unit_type_e */

    /* This data are raw payload */
    int     i_payload;
    uint8_t *p_payload;
} x264_nal_t;

/* x264_nal_encode:
 *      encode a nal into a buffer, setting the size.
 *      if b_annexeb then a long synch work is added
 *      XXX: it currently doesn't check for overflow */
int x264_nal_encode( void *, int *, int b_annexeb, x264_nal_t *nal );

/* x264_nal_decode:
 *      decode a buffer nal into a x264_nal_t */
int x264_nal_decode( x264_nal_t *nal, void *, int );

/****************************************************************************
 * Encoder functions:
 ****************************************************************************/

/* x264_encoder_open:
 *      create a new encoder handler, all parameters from x264_param_t are copied */
x264_t *x264_encoder_open   ( x264_param_t * );
/* x264_encoder_reconfig:
 *      change encoder options while encoding,
 *      analysis-related parameters from x264_param_t are copied */
int     x264_encoder_reconfig( x264_t *, x264_param_t * );
/* x264_encoder_headers:
 *      return the SPS and PPS that will be used for the whole stream */
int     x264_encoder_headers( x264_t *, x264_nal_t **, int * );
/* x264_encoder_encode:
 *      encode one picture */
int     x264_encoder_encode ( x264_t *, x264_nal_t **, int *, x264_picture_t *, x264_picture_t * );
/* x264_encoder_close:
 *      close an encoder handler */
void    x264_encoder_close  ( x264_t * );

/* XXX: decoder isn't working so no need to export it */

/****************************************************************************
 * Private stuff for internal usage:
 ****************************************************************************/
//#ifdef __X264__
#   ifdef _MSC_VER
#       define inline __inline
#       define DECLARE_ALIGNED( type, var, n ) __declspec(align(n)) type var
#		define strncasecmp(s1, s2, n) strnicmp(s1, s2, n)
#   else
#       define DECLARE_ALIGNED( type, var, n ) type var __attribute__((aligned(n)))
#   endif
#endif

//#endif