3 * Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
4 * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
6 * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
7 * See http://libmpeg2.sourceforge.net/ for updates.
9 * mpeg2dec is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * mpeg2dec is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 /* macroblock modes */
25 #define MACROBLOCK_INTRA 1
26 #define MACROBLOCK_PATTERN 2
27 #define MACROBLOCK_MOTION_BACKWARD 4
28 #define MACROBLOCK_MOTION_FORWARD 8
29 #define MACROBLOCK_QUANT 16
30 #define DCT_TYPE_INTERLACED 32
32 #define MOTION_TYPE_SHIFT 6
38 /* picture structure */
40 #define BOTTOM_FIELD 2
41 #define FRAME_PICTURE 3
43 /* picture coding type */
49 typedef void mpeg2_mc_fct (uint8_t *, const uint8_t *, int, int);
59 typedef void motion_parser_t( mpeg2_decoder_t * decoder,
61 mpeg2_mc_fct * const * table );
63 struct mpeg2_decoder_s
65 /* first, state that carries information from one macroblock to the */
66 /* next inside a slice, and is never used outside of mpeg2_slice() */
68 /* bit parsing stuff */
69 uint32_t bitstream_buf; /* current 32 bit working set */
70 int bitstream_bits; /* used bits in working set */
71 const uint8_t * bitstream_ptr; /* buffer with stream data */
82 unsigned int limit_y_16;
83 unsigned int limit_y_8;
87 /* The f_ and b_ correspond to the forward and backward motion */
91 motion_parser_t * motion_parser[5];
93 /* predictor for DC coefficients in intra blocks */
94 int16_t dc_dct_pred[3];
96 /* DCT coefficients */
97 int16_t DCTblock[64] ATTR_ALIGN(64);
99 uint8_t * picture_dest[3];
100 void (* convert) (void * convert_id, uint8_t * const * src,
101 unsigned int v_offset);
105 unsigned int v_offset;
107 /* now non-slice-specific information */
109 /* sequence header stuff */
110 uint16_t * quantizer_matrix[4];
111 uint16_t (* chroma_quantizer[2])[64];
112 uint16_t quantizer_prescale[4][32][64];
113 int load_intra_quantizer_matrix;
114 int load_non_intra_quantizer_matrix;
116 /* The width and height of the picture snapped to macroblock units */
119 int vertical_position_extension;
122 /* picture header stuff */
124 /* what type of picture this is (I, P, B, D) */
127 /* picture coding extension stuff */
129 /* quantization factor for intra dc coefficients */
130 int intra_dc_precision;
131 /* top/bottom/both fields */
132 int picture_structure;
133 /* bool to indicate all predictions are frame based */
134 int frame_pred_frame_dct;
135 /* bool to indicate whether intra blocks have motion vectors */
136 /* (for concealment) */
137 int concealment_motion_vectors;
138 /* bit to indicate which quantization table to use */
140 /* bool to use different vlc tables */
141 int intra_vlc_format;
142 /* used for DMV MC */
145 /* stuff derived from bitstream */
147 /* pointer to the zigzag scan we're supposed to be using */
148 const uint8_t * scan;
154 int aspect_ratio_information;
155 int progressive_sequence;
165 mpeg2_decoder_t decoder;
170 int is_display_initialized;
171 mpeg2_state_t (* action) (struct mpeg2dec_s * mpeg2dec);
175 /* allocated in init - gcc has problems allocating such big structures */
176 uint8_t * chunk_buffer;
177 /* pointer to start of the current chunk */
178 uint8_t * chunk_start;
179 /* pointer to current position in chunk_buffer */
182 /* last start code ? */
187 uint32_t tag_current, tag2_current, tag_previous, tag2_previous;
192 int alloc_index_user;
194 uint8_t first_decode_slice;
195 uint8_t nb_decode_slices;
197 unsigned int user_data_len;
199 mpeg2_sequence_t new_sequence;
200 mpeg2_sequence_t sequence;
203 mpeg2_picture_t new_picture;
204 mpeg2_picture_t pictures[4];
205 mpeg2_picture_t * picture;
206 /*const*/ mpeg2_fbuf_t * fbuf[3]; /* 0: current fbuf, 1-2: prediction fbufs */
208 fbuf_alloc_t fbuf_alloc[3];
211 uint8_t * yuv_buf[3][3];
213 mpeg2_convert_t * convert;
215 unsigned int convert_id_size;
217 void (* convert_start) (void * id, const mpeg2_fbuf_t * fbuf,
218 const mpeg2_picture_t * picture,
219 const mpeg2_gop_t * gop);
224 int16_t display_offset_x, display_offset_y;
227 int8_t q_scale_type, scaled[4];
228 uint8_t quantizer_matrix[4][64];
229 uint8_t new_quantizer_matrix[4][64];
231 /* a spu decoder for possible closed captions */
232 //spu_decoder_t *cc_dec;
233 int xvmc_last_slice_code;
234 unsigned xxmc_mb_pic_height;
236 void *ptr_forward_ref_picture;
237 void *ptr_backward_ref_picture;
249 uint32_t mpeg2_detect_accel (void);
252 void mpeg2_cpu_state_init (uint32_t accel);
255 mpeg2_state_t mpeg2_seek_header (mpeg2dec_t * mpeg2dec);
256 mpeg2_state_t mpeg2_parse_header (mpeg2dec_t * mpeg2dec);
259 extern uint8_t mpeg2_scan_norm[64];
260 extern uint8_t mpeg2_scan_alt[64];
261 void mpeg2_header_state_init (mpeg2dec_t * mpeg2dec);
262 void mpeg2_reset_info (mpeg2_info_t * info);
263 int mpeg2_header_sequence (mpeg2dec_t * mpeg2dec);
264 int mpeg2_header_gop (mpeg2dec_t * mpeg2dec);
265 mpeg2_state_t mpeg2_header_picture_start (mpeg2dec_t * mpeg2dec);
266 int mpeg2_header_picture (mpeg2dec_t * mpeg2dec);
267 int mpeg2_header_extension (mpeg2dec_t * mpeg2dec);
268 int mpeg2_header_user_data (mpeg2dec_t * mpeg2dec);
269 void mpeg2_header_sequence_finalize (mpeg2dec_t * mpeg2dec);
270 void mpeg2_header_gop_finalize (mpeg2dec_t * mpeg2dec);
271 void mpeg2_header_picture_finalize (mpeg2dec_t * mpeg2dec, uint32_t accels);
272 mpeg2_state_t mpeg2_header_slice_start (mpeg2dec_t * mpeg2dec);
273 mpeg2_state_t mpeg2_header_end (mpeg2dec_t * mpeg2dec);
274 void mpeg2_set_fbuf (mpeg2dec_t * mpeg2dec, int b_type);
277 void mpeg2_mc_init (uint32_t accel);
280 mpeg2_mc_fct * put [8];
281 mpeg2_mc_fct * avg [8];
284 #define MPEG2_MC_EXTERN(x) mpeg2_mc_t mpeg2_mc_##x = { \
285 {MC_put_o_16_##x, MC_put_x_16_##x, MC_put_y_16_##x, MC_put_xy_16_##x, \
286 MC_put_o_8_##x, MC_put_x_8_##x, MC_put_y_8_##x, MC_put_xy_8_##x}, \
287 {MC_avg_o_16_##x, MC_avg_x_16_##x, MC_avg_y_16_##x, MC_avg_xy_16_##x, \
288 MC_avg_o_8_##x, MC_avg_x_8_##x, MC_avg_y_8_##x, MC_avg_xy_8_##x} \
291 extern mpeg2_mc_t mpeg2_mc_c;
292 extern mpeg2_mc_t mpeg2_mc_mmx;
293 extern mpeg2_mc_t mpeg2_mc_mmxext;
294 extern mpeg2_mc_t mpeg2_mc_3dnow;
295 extern mpeg2_mc_t mpeg2_mc_altivec;
296 extern mpeg2_mc_t mpeg2_mc_alpha;
297 extern mpeg2_mc_t mpeg2_mc_vis;