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rockbox/apps/plugins/mpegplayer/libmpeg2/mpeg2_internal.h
Michael Sevakis 652463ecc0 mpegplayer: Move libmpeg2 files into their own subdirectory so things are less cluttered. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29381 a1c6a512-1295-4272-9138-f99709370657
2011-02-22 21:44:15 +00:00

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/*
* mpeg2_internal.h
* Copyright (C) 2000-2003 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id$
* libmpeg2 sync history:
* 2008-07-01 - CVS revision 1.89
*/
#ifndef MPEG2_INTERNAL_H
#define MPEG2_INTERNAL_H
#include "config.h" /* for Rockbox CPU_ #defines */
/* macroblock modes */
#define MACROBLOCK_INTRA 1
#define MACROBLOCK_PATTERN 2
#define MACROBLOCK_MOTION_BACKWARD 4
#define MACROBLOCK_MOTION_FORWARD 8
#define MACROBLOCK_QUANT 16
#define DCT_TYPE_INTERLACED 32
/* motion_type */
#define MOTION_TYPE_SHIFT 6
#define MC_FIELD 1
#define MC_FRAME 2
#define MC_16X8 2
#define MC_DMV 3
/* picture structure */
#define TOP_FIELD 1
#define BOTTOM_FIELD 2
#define FRAME_PICTURE 3
/* picture coding type */
#define I_TYPE 1
#define P_TYPE 2
#define B_TYPE 3
#define D_TYPE 4
typedef void mpeg2_mc_fct (uint8_t *, const uint8_t *, int, int);
typedef struct
{
uint8_t * ref[2][MPEG2_COMPONENTS];
uint8_t ** ref2[2];
int pmv[2][2];
int f_code[2];
} motion_t;
typedef void motion_parser_t(mpeg2_decoder_t * decoder,
motion_t * motion,
mpeg2_mc_fct * const * table);
struct mpeg2_decoder_s
{
/* first, state that carries information from one macroblock to the */
/* next inside a slice, and is never used outside of mpeg2_slice() */
/* bit parsing stuff */
uint32_t bitstream_buf; /* current 32 bit working set */
int bitstream_bits; /* used bits in working set */
const uint8_t * bitstream_ptr; /* buffer with stream data */
uint8_t * dest[MPEG2_COMPONENTS];
int offset;
int stride;
int uv_stride;
int slice_stride;
int slice_uv_stride;
int stride_frame;
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;
motion_parser_t * motion_parser[5];
/* predictor for DC coefficients in intra blocks */
int16_t dc_dct_pred[MPEG2_COMPONENTS];
/* DCT coefficients */
int16_t * DCTblock; /* put buffer separately to have it in IRAM */
uint8_t * picture_dest[MPEG2_COMPONENTS];
void (* convert) (void * convert_id, uint8_t * const * src,
unsigned int v_offset);
void * convert_id;
int dmv_offset;
unsigned int v_offset;
/* now non-slice-specific information */
/* sequence header stuff */
uint16_t * quantizer_matrix[4];
uint16_t (* chroma_quantizer[2])[64];
uint16_t quantizer_prescale[4][32][64];
/* The width and height of the picture snapped to macroblock units */
int width;
int height;
int vertical_position_extension;
int chroma_format;
/* picture header stuff */
/* what type of picture this is (I, P, B, D) */
int coding_type;
/* 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;
/* 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 */
const uint8_t * scan;
int second_field;
int mpeg1;
};
typedef struct
{
mpeg2_fbuf_t fbuf;
} fbuf_alloc_t;
struct mpeg2dec_s
{
mpeg2_decoder_t decoder;
mpeg2_info_t info;
uint32_t shift;
int is_display_initialized;
mpeg2_state_t (* action) (struct mpeg2dec_s * mpeg2dec);
mpeg2_state_t state;
uint32_t ext_state;
/* allocated in init - gcc has problems allocating such big structures */
uint8_t * ATTR_ALIGN(4) chunk_buffer;
/* pointer to start of the current chunk */
uint8_t * chunk_start;
/* pointer to current position in chunk_buffer */
uint8_t * chunk_ptr;
/* last start code ? */
uint8_t code;
/* picture tags */
uint32_t tag_current, tag2_current, tag_previous, tag2_previous;
int num_tags;
int bytes_since_tag;
int first;
int alloc_index_user;
int alloc_index;
uint8_t first_decode_slice;
uint8_t nb_decode_slices;
unsigned int user_data_len;
mpeg2_sequence_t new_sequence;
mpeg2_sequence_t sequence;
mpeg2_gop_t new_gop;
mpeg2_gop_t gop;
mpeg2_picture_t new_picture;
mpeg2_picture_t pictures[4];
mpeg2_picture_t * picture;
/*const*/ mpeg2_fbuf_t * fbuf[3]; /* 0: current fbuf, 1-2: prediction fbufs */
fbuf_alloc_t fbuf_alloc[3];
int custom_fbuf;
uint8_t * yuv_buf[3][MPEG2_COMPONENTS];
int yuv_index;
mpeg2_convert_t * convert;
void * convert_arg;
unsigned int convert_id_size;
int convert_stride;
void (* convert_start) (void * id, const mpeg2_fbuf_t * fbuf,
const mpeg2_picture_t * picture,
const mpeg2_gop_t * gop);
uint8_t * buf_start;
uint8_t * buf_end;
int16_t display_offset_x, display_offset_y;
int copy_matrix;
int8_t q_scale_type, scaled[4];
uint8_t quantizer_matrix[4][64];
uint8_t new_quantizer_matrix[4][64];
};
/* decode.c */
mpeg2_state_t mpeg2_seek_header (mpeg2dec_t * mpeg2dec);
mpeg2_state_t mpeg2_parse_header (mpeg2dec_t * mpeg2dec);
/* header.c */
void mpeg2_header_state_init (mpeg2dec_t * mpeg2dec);
void mpeg2_reset_info (mpeg2_info_t * info);
int mpeg2_header_sequence (mpeg2dec_t * mpeg2dec);
int mpeg2_header_gop (mpeg2dec_t * mpeg2dec);
int mpeg2_header_picture (mpeg2dec_t * mpeg2dec);
int mpeg2_header_extension (mpeg2dec_t * mpeg2dec);
int mpeg2_header_user_data (mpeg2dec_t * mpeg2dec);
void mpeg2_header_sequence_finalize (mpeg2dec_t * mpeg2dec);
void mpeg2_header_gop_finalize (mpeg2dec_t * mpeg2dec);
void mpeg2_header_picture_finalize (mpeg2dec_t * mpeg2dec);
mpeg2_state_t mpeg2_header_slice_start (mpeg2dec_t * mpeg2dec);
mpeg2_state_t mpeg2_header_end (mpeg2dec_t * mpeg2dec);
void mpeg2_set_fbuf (mpeg2dec_t * mpeg2dec, int b_type);
/* idct.c */
void mpeg2_idct_init (void);
void mpeg2_idct_copy(int16_t * block, uint8_t * dest,
const int stride);
void mpeg2_idct_add(const int last, int16_t * block,
uint8_t * dest, const int stride);
extern const uint8_t default_mpeg2_scan_norm[64];
extern const uint8_t default_mpeg2_scan_alt[64];
extern uint8_t mpeg2_scan_norm[64];
extern uint8_t mpeg2_scan_alt[64];
/* motion_comp.c */
void mpeg2_mc_init (void);
typedef struct
{
mpeg2_mc_fct * put [8];
mpeg2_mc_fct * avg [8];
} mpeg2_mc_t;
extern const mpeg2_mc_t mpeg2_mc;
#endif /* MPEG2_INTERNAL_H */
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