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Diffstat (limited to 'src/libmpeg2/mpeg2_internal.h')
| -rw-r--r-- | src/libmpeg2/mpeg2_internal.h | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/src/libmpeg2/mpeg2_internal.h b/src/libmpeg2/mpeg2_internal.h new file mode 100644 index 000000000..d3a92eb74 --- /dev/null +++ b/src/libmpeg2/mpeg2_internal.h @@ -0,0 +1,194 @@ +/* + * mpeg2_internal.h + * Copyright (C) 1999-2001 Aaron Holtzman <aholtzma@ess.engr.uvic.ca> + * + * This file is part of mpeg2dec, a free MPEG-2 video stream decoder. + * + * 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 + */ + +/* 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_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 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 struct motion_s { + uint8_t * ref[2][3]; + 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 slice_process() */ + + /* DCT coefficients - should be kept aligned ! */ + int16_t DCTblock[64]; + + /* 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 */ + + /* 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 v_offset; /* remove */ + + + /* now non-slice-specific information */ + + /* sequence header stuff */ + uint8_t intra_quantizer_matrix [64]; + uint8_t non_intra_quantizer_matrix [64]; + + /* The width and height of the picture snapped to macroblock units */ + int coded_picture_width; + int coded_picture_height; + + /* picture header stuff */ + + /* what type of picture this is (I, P, B, D) */ + int picture_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; + /* 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 second_field; + + int mpeg1; + + /* 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 frame_rate_code; + int progressive_sequence; + int repeat_first_field; + int progressive_frame; + int bitrate; +} picture_t; + +typedef struct mpeg2_config_s { + /* Bit flags that enable various things */ + uint32_t flags; +} mpeg2_config_t; + +/* The only global variable, */ +/* the config struct */ +extern mpeg2_config_t config; + + + +/* slice.c */ +void header_state_init (picture_t * picture); +int header_process_picture_header (picture_t * picture, uint8_t * buffer); +int header_process_sequence_header (picture_t * picture, uint8_t * buffer); +int header_process_extension (picture_t * picture, uint8_t * buffer); + +/* idct.c */ +void idct_init (void); + +/* idct_mlib.c */ +void idct_block_copy_mlib (int16_t * block, uint8_t * dest, int stride); +void idct_block_add_mlib (int16_t * block, uint8_t * dest, int stride); + +/* idct_mmx.c */ +void idct_block_copy_mmxext (int16_t *block, uint8_t * dest, int stride); +void idct_block_add_mmxext (int16_t *block, uint8_t * dest, int stride); +void idct_block_copy_mmx (int16_t *block, uint8_t * dest, int stride); +void idct_block_add_mmx (int16_t *block, uint8_t * dest, int stride); +void idct_mmx_init (void); + +/* motion_comp.c */ +void motion_comp_init (void); + +typedef struct mc_functions_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); +} mc_functions_t; + +#define MOTION_COMP_EXTERN(x) mc_functions_t mc_functions_##x = \ +{ \ + {MC_put_16_##x, MC_put_x16_##x, MC_put_y16_##x, MC_put_xy16_##x, \ + MC_put_8_##x, MC_put_x8_##x, MC_put_y8_##x, MC_put_xy8_##x}, \ + {MC_avg_16_##x, MC_avg_x16_##x, MC_avg_y16_##x, MC_avg_xy16_##x, \ + MC_avg_8_##x, MC_avg_x8_##x, MC_avg_y8_##x, MC_avg_xy8_##x} \ +}; + +extern mc_functions_t mc_functions_c; +extern mc_functions_t mc_functions_mmx; +extern mc_functions_t mc_functions_mmxext; +extern mc_functions_t mc_functions_3dnow; +extern mc_functions_t mc_functions_mlib; + +/* slice.c */ +int slice_process (picture_t *picture, uint8_t code, uint8_t * buffer); + +/* stats.c */ +void stats_header (uint8_t code, uint8_t * buffer); |