mpeg2_internal.h

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/*
 * mpeg2_internal.h
 * Copyright (C) 2000-2002 Michel Lespinasse <walken@zoy.org>
 * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
 *
 * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
 * See http://libmpeg2.sourceforge.net/ for updates.
 *
 * mpeg2dec 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.
 *
 * mpeg2dec 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 St, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#ifndef MPEG2_INTERNAL_H
#define MPEG2_INTERNAL_H

#include <xine/video_out.h>
#include "accel_xvmc.h"

#ifdef ENABLE_ALTIVEC
#include <altivec.h>
#endif

/* macroblock modes */
#define MACROBLOCK_INTRA            XINE_MACROBLOCK_INTRA
#define MACROBLOCK_PATTERN          XINE_MACROBLOCK_PATTERN
#define MACROBLOCK_MOTION_BACKWARD  XINE_MACROBLOCK_MOTION_BACKWARD
#define MACROBLOCK_MOTION_FORWARD   XINE_MACROBLOCK_MOTION_FORWARD
#define MACROBLOCK_QUANT            XINE_MACROBLOCK_QUANT
#define DCT_TYPE_INTERLACED         XINE_MACROBLOCK_DCT_TYPE_INTERLACED

/* motion_type */
#define MOTION_TYPE_MASK (3*64)
#define MOTION_TYPE_BASE 64
#define MC_FIELD (1*64)
#define MC_FRAME (2*64)
#define MC_16X8 (2*64)
#define MC_DMV (3*64)

/* picture structure */
#define TOP_FIELD     VO_TOP_FIELD
#define BOTTOM_FIELD  VO_BOTTOM_FIELD
#define FRAME_PICTURE VO_BOTH_FIELDS

/* picture coding type (mpeg2 header) */
#define I_TYPE 1
#define P_TYPE 2
#define B_TYPE 3
#define D_TYPE 4
               
typedef struct motion_s {
    uint8_t * ref[2][3];
    uint8_t ** ref2[2];
    int pmv[2][2];
    int f_code[2];
} motion_t;

typedef struct picture_s {
    /* first, state that carries information from one macroblock to the */
    /* next inside a slice, and is never used outside of mpeg2_slice() */

    /* DCT coefficients - should be kept aligned ! */
    int16_t DCTblock[64];

    /* XvMC DCT block and macroblock data for XvMC acceleration */
    xine_macroblocks_t *mc;
    int XvMC_mb_type;
    int XvMC_mv_field_sel[2][2];
    int XvMC_x;
    int XvMC_y;
    int XvMC_motion_type;
    int XvMC_dmvector[2];
    int XvMC_cbp;
    int XvMC_dct_type;

    /* bit parsing stuff */
    uint32_t bitstream_buf;     /* current 32 bit working set of buffer */
    int bitstream_bits;         /* used bits in working set */
    uint8_t * bitstream_ptr;    /* buffer with stream data */

    uint8_t * dest[3];
    int pitches[3];
    int offset;
    unsigned int limit_x;
    unsigned int limit_y_16;
    unsigned int limit_y_8;
    unsigned int limit_y;

    /* Motion vectors */
    /* The f_ and b_ correspond to the forward and backward motion */
    /* predictors */
    motion_t b_motion;
    motion_t f_motion;

    /* predictor for DC coefficients in intra blocks */
    int16_t dc_dct_pred[3];

    int quantizer_scale;        /* remove */
    int current_field;          /* remove */
    int dmv_offset;             /* remove */
    unsigned int v_offset;              /* remove */


    /* now non-slice-specific information */

    /* sequence header stuff */
    uint8_t intra_quantizer_matrix [64];
    uint8_t non_intra_quantizer_matrix [64];
    int load_intra_quantizer_matrix;
    int load_non_intra_quantizer_matrix;

    /* The width and height of the picture snapped to macroblock units */
    int coded_picture_width;
    int coded_picture_height;
    
    /* The width and height as it appears on header sequence */
    unsigned int display_width, display_height;

    /* picture header stuff */

    /* what type of picture this is (I, P, B, D) */
    int picture_coding_type;

    int vbv_delay;
    int low_delay;
        
    /* picture coding extension stuff */
        
    /* quantization factor for intra dc coefficients */
    int intra_dc_precision;
    /* top/bottom/both fields */
    int picture_structure;
    /* bool to indicate all predictions are frame based */
    int frame_pred_frame_dct;
    /* bool to indicate whether intra blocks have motion vectors */
    /* (for concealment) */
    int concealment_motion_vectors;
    /* bit to indicate which quantization table to use */
    int q_scale_type;
    /* bool to use different vlc tables */
    int intra_vlc_format;
    /* used for DMV MC */
    int top_field_first;

    /* stuff derived from bitstream */

    /* pointer to the zigzag scan we're supposed to be using */
    uint8_t * scan;

    struct vo_frame_s * current_frame;
    struct vo_frame_s * forward_reference_frame;
    struct vo_frame_s * backward_reference_frame;

    int frame_width, frame_height;

    int second_field;

    int mpeg1;

    int skip_non_intra_dct;

    /* these things are not needed by the decoder */
    /* this is a temporary interface, we will build a better one later. */
    int aspect_ratio_information;
    int saved_aspect_ratio;
    int frame_rate_code;
    int progressive_sequence;
    int repeat_first_field;
    int progressive_frame;
    int32_t frame_centre_horizontal_offset;
    int32_t frame_centre_vertical_offset;
    uint32_t video_format;
    uint32_t colour_description;
    uint32_t colour_primatives;
    uint32_t transfer_characteristics;
    uint32_t matrix_coefficients;
    uint32_t display_horizontal_size;
    uint32_t display_vertical_size;
    uint32_t drop_frame_flag;
    uint32_t time_code_hours;
    uint32_t time_code_minutes;
    uint32_t time_code_seconds;
    uint32_t time_code_pictures;
    uint32_t closed_gop;
    uint32_t broken_link;

    int bitrate;
    int frame_rate_ext_n;
    int frame_rate_ext_d;

} picture_t;

typedef struct cpu_state_s {
#ifdef ARCH_PPC
    uint8_t regv[12*16];
#endif
    int dummy;
} cpu_state_t;

/* cpu_state.c */
extern void (* mpeg2_cpu_state_save) (cpu_state_t * state);
extern void (* mpeg2_cpu_state_restore) (cpu_state_t * state);
void mpeg2_cpu_state_init (uint32_t mm_accel);

/* header.c */
extern uint8_t mpeg2_scan_norm[64];
extern uint8_t mpeg2_scan_alt[64];
void mpeg2_header_state_init (picture_t * picture);
int mpeg2_header_picture (picture_t * picture, uint8_t * buffer);
int mpeg2_header_sequence (picture_t * picture, uint8_t * buffer);
int mpeg2_header_extension (picture_t * picture, uint8_t * buffer);
int mpeg2_header_group_of_pictures (picture_t * picture, uint8_t * buffer);

/* idct.c */
extern void (* mpeg2_idct_copy) (int16_t * block, uint8_t * dest, int stride);
extern void (* mpeg2_idct_add) (int16_t * block, uint8_t * dest, int stride);
extern void (* mpeg2_idct) (int16_t * block);
extern void (* mpeg2_zero_block) (int16_t * block);
void mpeg2_idct_init (uint32_t mm_accel);

/* idct_mlib.c */
void mpeg2_idct_add_mlib (int16_t * block, uint8_t * dest, int stride);
void mpeg2_idct_copy_mlib_non_ieee (int16_t * block, uint8_t * dest,
                                    int stride);
void mpeg2_idct_add_mlib_non_ieee (int16_t * block, uint8_t * dest,
                                   int stride);
void mpeg2_idct_mlib (int16_t * block);

/* idct_mmx.c */
void mpeg2_idct_copy_mmxext (int16_t * block, uint8_t * dest, int stride);
void mpeg2_idct_add_mmxext (int16_t * block, uint8_t * dest, int stride);
void mpeg2_idct_mmxext (int16_t * block);
void mpeg2_idct_copy_mmx (int16_t * block, uint8_t * dest, int stride);
void mpeg2_idct_add_mmx (int16_t * block, uint8_t * dest, int stride);
void mpeg2_idct_mmx (int16_t * block);
void mpeg2_zero_block_mmx (int16_t * block);
void mpeg2_idct_mmx_init (void);

/* idct_altivec.c */
# ifdef ENABLE_ALTIVEC
void mpeg2_idct_copy_altivec (vector signed short * block, unsigned char * dest,
                              int stride);
void mpeg2_idct_add_altivec (vector signed short * block, unsigned char * dest,
                             int stride);
# else /* ! ENABLE_ALTIVEC */
void mpeg2_idct_copy_altivec (signed short * block, unsigned char * dest,
                              int stride);
void mpeg2_idct_add_altivec (signed short * block, unsigned char * dest,
                             int stride);
# endif /* ENABLE_ALTIVEC */
void mpeg2_idct_altivec_init (void);

/* motion_comp.c */
void mpeg2_mc_init (uint32_t mm_accel);

typedef struct mpeg2_mc_s {
    void (* put [8]) (uint8_t * dst, uint8_t *, int32_t, int32_t);
    void (* avg [8]) (uint8_t * dst, uint8_t *, int32_t, int32_t);
} mpeg2_mc_t;

#define MPEG2_MC_EXTERN(x) mpeg2_mc_t mpeg2_mc_##x = {                    \
    {MC_put_o_16_##x, MC_put_x_16_##x, MC_put_y_16_##x, MC_put_xy_16_##x, \
     MC_put_o_8_##x,  MC_put_x_8_##x,  MC_put_y_8_##x,  MC_put_xy_8_##x}, \
    {MC_avg_o_16_##x, MC_avg_x_16_##x, MC_avg_y_16_##x, MC_avg_xy_16_##x, \
     MC_avg_o_8_##x,  MC_avg_x_8_##x,  MC_avg_y_8_##x,  MC_avg_xy_8_##x}  \
};

extern mpeg2_mc_t mpeg2_mc;
extern mpeg2_mc_t mpeg2_mc_c;
extern mpeg2_mc_t mpeg2_mc_mmx;
extern mpeg2_mc_t mpeg2_mc_mmxext;
extern mpeg2_mc_t mpeg2_mc_3dnow;
extern mpeg2_mc_t mpeg2_mc_altivec;
extern mpeg2_mc_t mpeg2_mc_mlib;
extern mpeg2_mc_t mpeg2_mc_vis;

/* slice.c */
void mpeg2_slice (picture_t * picture, int code, uint8_t * buffer);

/* stats.c */
void mpeg2_stats (int code, uint8_t * buffer);


#endif