libmpeg2/mpeg2_internal.h

   1 /*
   2  * mpeg2_internal.h
   3  * Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
   4  * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
   5  *
   6  * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
   7  * See http://libmpeg2.sourceforge.net/ for updates.
   8  *
   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.
  13  *
  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.
  18  *
  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
  22  *
  23  * Modified for use with MPlayer, see libmpeg-0.4.1.diff for the exact changes.
  24  * detailed changelog at http://svn.mplayerhq.hu/mplayer/trunk/
  25  * $Id$
  26  */
  27
  28 /* macroblock modes */
  29 #define MACROBLOCK_INTRA 1
  30 #define MACROBLOCK_PATTERN 2
  31 #define MACROBLOCK_MOTION_BACKWARD 4
  32 #define MACROBLOCK_MOTION_FORWARD 8
  33 #define MACROBLOCK_QUANT 16
  34 #define DCT_TYPE_INTERLACED 32
  35 /* motion_type */
  36 #define MOTION_TYPE_SHIFT 6
  37 #define MC_FIELD 1
  38 #define MC_FRAME 2
  39 #define MC_16X8 2
  40 #define MC_DMV 3
  41
  42 /* picture structure */
  43 #define TOP_FIELD 1
  44 #define BOTTOM_FIELD 2
  45 #define FRAME_PICTURE 3
  46
  47 /* picture coding type */
  48 #define I_TYPE 1
  49 #define P_TYPE 2
  50 #define B_TYPE 3
  51 #define D_TYPE 4
  52
  53 typedef void mpeg2_mc_fct (uint8_t *, const uint8_t *, int, int);
  54
  55 typedef struct {
  56     uint8_t * ref[2][3];
  57     uint8_t ** ref2[2];
  58     int pmv[2][2];
  59     int f_code[2];
  60 } motion_t;
  61
  62 typedef void motion_parser_t (mpeg2_decoder_t * decoder,
  63                               motion_t * motion,
  64                               mpeg2_mc_fct * const * table);
  65
  66 struct mpeg2_decoder_s {
  67     /* first, state that carries information from one macroblock to the */
  68     /* next inside a slice, and is never used outside of mpeg2_slice() */
  69
  70     /* bit parsing stuff */
  71     uint32_t bitstream_buf;             /* current 32 bit working set */
  72     int bitstream_bits;                 /* used bits in working set */
  73     const uint8_t * bitstream_ptr;      /* buffer with stream data */
  74
  75     uint8_t * dest[3];
  76
  77     int offset;
  78     int stride;
  79     int uv_stride;
  80     int slice_stride;
  81     int slice_uv_stride;
  82     int stride_frame;
  83     unsigned int limit_x;
  84     unsigned int limit_y_16;
  85     unsigned int limit_y_8;
  86     unsigned int limit_y;
  87
  88     /* Motion vectors */
  89     /* The f_ and b_ correspond to the forward and backward motion */
  90     /* predictors */
  91     motion_t b_motion;
  92     motion_t f_motion;
  93     motion_parser_t * motion_parser[5];
  94
  95     /* predictor for DC coefficients in intra blocks */
  96     int16_t dc_dct_pred[3];
  97
  98     /* DCT coefficients */
  99     int16_t DCTblock[64] ATTR_ALIGN(64);
 100
 101     uint8_t * picture_dest[3];
 102     void (* convert) (void * convert_id, uint8_t * const * src,
 103                       unsigned int v_offset);
 104     void * convert_id;
 105
 106     int dmv_offset;
 107     unsigned int v_offset;
 108
 109     /* now non-slice-specific information */
 110
 111     /* sequence header stuff */
 112     uint16_t * quantizer_matrix[4];
 113     uint16_t (* chroma_quantizer[2])[64];
 114     uint16_t quantizer_prescale[4][32][64];
 115
 116     /* The width and height of the picture snapped to macroblock units */
 117     int width;
 118     int height;
 119     int vertical_position_extension;
 120     int chroma_format;
 121
 122     /* picture header stuff */
 123
 124     /* what type of picture this is (I, P, B, D) */
 125     int coding_type;
 126
 127     /* picture coding extension stuff */
 128
 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     /* bool to use different vlc tables */
 139     int intra_vlc_format;
 140     /* used for DMV MC */
 141     int top_field_first;
 142
 143     /* stuff derived from bitstream */
 144
 145     /* pointer to the zigzag scan we're supposed to be using */
 146     const uint8_t * scan;
 147
 148     int second_field;
 149
 150     int mpeg1;
 151
 152     /* for MPlayer: */
 153     int quantizer_scales[32];
 154     int quantizer_scale;
 155     char* quant_store;
 156     int quant_stride;
 157 };
 158
 159 typedef struct {
 160     mpeg2_fbuf_t fbuf;
 161 } fbuf_alloc_t;
 162
 163 struct mpeg2dec_s {
 164     mpeg2_decoder_t decoder;
 165
 166     mpeg2_info_t info;
 167
 168     uint32_t shift;
 169     int is_display_initialized;
 170     mpeg2_state_t (* action) (struct mpeg2dec_s * mpeg2dec);
 171     mpeg2_state_t state;
 172     uint32_t ext_state;
 173
 174     /* allocated in init - gcc has problems allocating such big structures */
 175     uint8_t * chunk_buffer;
 176     /* pointer to start of the current chunk */
 177     uint8_t * chunk_start;
 178     /* pointer to current position in chunk_buffer */
 179     uint8_t * chunk_ptr;
 180     /* last start code ? */
 181     uint8_t code;
 182
 183     /* picture tags */
 184     uint32_t tag_current, tag2_current, tag_previous, tag2_previous;
 185     int num_tags;
 186     int bytes_since_tag;
 187
 188     int first;
 189     int alloc_index_user;
 190     int alloc_index;
 191     uint8_t first_decode_slice;
 192     uint8_t nb_decode_slices;
 193
 194     unsigned int user_data_len;
 195
 196     mpeg2_sequence_t new_sequence;
 197     mpeg2_sequence_t sequence;
 198     mpeg2_gop_t new_gop;
 199     mpeg2_gop_t gop;
 200     mpeg2_picture_t new_picture;
 201     mpeg2_picture_t pictures[4];
 202     mpeg2_picture_t * picture;
 203     /*const*/ mpeg2_fbuf_t * fbuf[3];   /* 0: current fbuf, 1-2: prediction fbufs */
 204
 205     fbuf_alloc_t fbuf_alloc[3];
 206     int custom_fbuf;
 207
 208     uint8_t * yuv_buf[3][3];
 209     int yuv_index;
 210     mpeg2_convert_t * convert;
 211     void * convert_arg;
 212     unsigned int convert_id_size;
 213     int convert_stride;
 214     void (* convert_start) (void * id, const mpeg2_fbuf_t * fbuf,
 215                             const mpeg2_picture_t * picture,
 216                             const mpeg2_gop_t * gop);
 217
 218     uint8_t * buf_start;
 219     uint8_t * buf_end;
 220
 221     int16_t display_offset_x, display_offset_y;
 222
 223     int copy_matrix;
 224     int8_t q_scale_type, scaled[4];
 225     uint8_t quantizer_matrix[4][64];
 226     uint8_t new_quantizer_matrix[4][64];
 227
 228     /* for MPlayer: */
 229     unsigned char *pending_buffer;
 230     int pending_length;
 231 };
 232
 233 typedef struct {
 234 #ifdef ARCH_PPC
 235     uint8_t regv[12*16];
 236 #endif
 237     int dummy;
 238 } cpu_state_t;
 239
 240 /* cpu_accel.c */
 241 uint32_t mpeg2_detect_accel (void);
 242
 243 /* cpu_state.c */
 244 void mpeg2_cpu_state_init (uint32_t accel);
 245
 246 /* decode.c */
 247 mpeg2_state_t mpeg2_seek_header (mpeg2dec_t * mpeg2dec);
 248 mpeg2_state_t mpeg2_parse_header (mpeg2dec_t * mpeg2dec);
 249
 250 /* header.c */
 251 void mpeg2_header_state_init (mpeg2dec_t * mpeg2dec);
 252 void mpeg2_reset_info (mpeg2_info_t * info);
 253 int mpeg2_header_sequence (mpeg2dec_t * mpeg2dec);
 254 int mpeg2_header_gop (mpeg2dec_t * mpeg2dec);
 255 mpeg2_state_t mpeg2_header_picture_start (mpeg2dec_t * mpeg2dec);
 256 int mpeg2_header_picture (mpeg2dec_t * mpeg2dec);
 257 int mpeg2_header_extension (mpeg2dec_t * mpeg2dec);
 258 int mpeg2_header_user_data (mpeg2dec_t * mpeg2dec);
 259 void mpeg2_header_sequence_finalize (mpeg2dec_t * mpeg2dec);
 260 void mpeg2_header_gop_finalize (mpeg2dec_t * mpeg2dec);
 261 void mpeg2_header_picture_finalize (mpeg2dec_t * mpeg2dec, uint32_t accels);
 262 mpeg2_state_t mpeg2_header_slice_start (mpeg2dec_t * mpeg2dec);
 263 mpeg2_state_t mpeg2_header_end (mpeg2dec_t * mpeg2dec);
 264 void mpeg2_set_fbuf (mpeg2dec_t * mpeg2dec, int b_type);
 265
 266 /* idct.c */
 267 void mpeg2_idct_init (uint32_t accel);
 268
 269 /* idct_mmx.c */
 270 void mpeg2_idct_copy_mmxext (int16_t * block, uint8_t * dest, int stride);
 271 void mpeg2_idct_add_mmxext (int last, int16_t * block,
 272                             uint8_t * dest, int stride);
 273 void mpeg2_idct_copy_mmx (int16_t * block, uint8_t * dest, int stride);
 274 void mpeg2_idct_add_mmx (int last, int16_t * block,
 275                          uint8_t * dest, int stride);
 276 void mpeg2_idct_mmx_init (void);
 277
 278 /* idct_altivec.c */
 279 void mpeg2_idct_copy_altivec (int16_t * block, uint8_t * dest, int stride);
 280 void mpeg2_idct_add_altivec (int last, int16_t * block,
 281                              uint8_t * dest, int stride);
 282 void mpeg2_idct_altivec_init (void);
 283
 284 /* idct_alpha.c */
 285 void mpeg2_idct_copy_mvi (int16_t * block, uint8_t * dest, int stride);
 286 void mpeg2_idct_add_mvi (int last, int16_t * block,
 287                          uint8_t * dest, int stride);
 288 void mpeg2_idct_copy_alpha (int16_t * block, uint8_t * dest, int stride);
 289 void mpeg2_idct_add_alpha (int last, int16_t * block,
 290                            uint8_t * dest, int stride);
 291 void mpeg2_idct_alpha_init (void);
 292
 293 /* motion_comp.c */
 294 void mpeg2_mc_init (uint32_t accel);
 295
 296 typedef struct {
 297     mpeg2_mc_fct * put [8];
 298     mpeg2_mc_fct * avg [8];
 299 } mpeg2_mc_t;
 300
 301 #define MPEG2_MC_EXTERN(x) mpeg2_mc_t mpeg2_mc_##x = {                    \
 302     {MC_put_o_16_##x, MC_put_x_16_##x, MC_put_y_16_##x, MC_put_xy_16_##x, \
 303      MC_put_o_8_##x,  MC_put_x_8_##x,  MC_put_y_8_##x,  MC_put_xy_8_##x}, \
 304     {MC_avg_o_16_##x, MC_avg_x_16_##x, MC_avg_y_16_##x, MC_avg_xy_16_##x, \
 305      MC_avg_o_8_##x,  MC_avg_x_8_##x,  MC_avg_y_8_##x,  MC_avg_xy_8_##x}  \
 306 };
 307
 308 extern mpeg2_mc_t mpeg2_mc_c;
 309 extern mpeg2_mc_t mpeg2_mc_mmx;
 310 extern mpeg2_mc_t mpeg2_mc_mmxext;
 311 extern mpeg2_mc_t mpeg2_mc_3dnow;
 312 extern mpeg2_mc_t mpeg2_mc_altivec;
 313 extern mpeg2_mc_t mpeg2_mc_alpha;
 314 extern mpeg2_mc_t mpeg2_mc_vis;