1 /*****************************************************************************
2 * vpar_blocks.c : blocks parsing
4 *****************************************************************************/
6 /*****************************************************************************
8 *****************************************************************************/
16 #include <X11/extensions/XShm.h>
21 #include "vlc_thread.h"
24 #include "debug.h" /* ?? temporaire, requis par netlist.h */
27 #include "input_netlist.h"
28 #include "decoder_fifo.h"
30 #include "video_output.h"
31 #include "video_parser.h"
33 #include "video_fifo.h"
34 #include "video_decoder.h"
39 static __inline__ void InitMacroblock( vpar_thread_t * p_vpar,
40 macroblock_t * p_mb, int i_mb_address );
41 static __inline__ int MacroblockAddressIncrement( vpar_thread_t * p_vpar );
42 static __inline__ void MacroblockModes( vpar_thread_t * p_vpar,
43 macroblock_t * p_mb );
45 typedef (void *) f_decode_block_t( vpar_thread_t *, macroblock_t *, int );
47 /*****************************************************************************
48 * vpar_ParseMacroblock : Parse the next macroblock
49 *****************************************************************************/
50 void vpar_ParseMacroblock( vpar_thread_t * p_vpar, int * pi_mb_address,
51 int i_mb_previous, int i_mb_base )
53 static f_addb_t ppf_addb_intra[2] = {vdec_AddBlock, vdec_CopyBlock};
55 int i_mb, i_b, i_mask, i_x, i_y, pi_pos[3], pi_width[3];
59 *pi_mb_address += MacroblockAddressIncrement( p_vpar );
61 for( i_mb = i_mb_previous; i_mb < *pi_mb_address; i_mb++ )
63 /* Skipped macroblock (ISO/IEC 13818-2 7.6.6). */
64 static int pi_dc_dct_reinit[4] = {128,256,512,1024};
65 static f_motion_t pf_motion_skipped[4] = {NULL, vdec_MotionField,
66 vdec_MotionField, vdec_MotionFrame};
68 /* Reset DC predictors (7.2.1). */
69 p_vpar->slice.pi_dct_pred[0] = p_vpar->slice.pi_dct_pred[1]
70 = p_vpar->slice.pi_dct_pred[2]
71 = pi_dc_dct_reinit[p_vpar->picture.i_intra_dc_precision];
73 if( p_vpar->picture.i_coding_type == P_CODING_TYPE )
75 /* Reset motion vector predictors (ISO/IEC 13818-2 7.6.3.4). */
76 bzero( p_vpar->slice.pppi_pmv, 8*sizeof(int) );
79 if( (p_mb = p_vpar->picture.pp_mb[i_mb_base + i_mb] =
80 vpar_NewMacroblock( &p_vpar->vfifo )) == NULL )
82 p_vpar->picture.b_error = TRUE;
83 intf_ErrMsg("vpar error: macroblock list is empty !");
87 InitMacroblock( p_vpar, p_mb, i_mb );
89 /* No IDCT nor AddBlock. */
90 for( i_b = 0; i_b < 12; i_b++ )
92 p_mb->pf_idct[i_b] = vdec_DummyIDCT;
93 p_mb->pf_addb[i_b] = vdec_DummyBlock;
96 /* Motion type is picture structure. */
97 p_mb->pf_motion = pf_motion_skipped[p_vpar->picture.i_structure];
99 /* Predict from field of same parity. */
103 /* Get a macroblock structure. */
104 if( (p_mb = p_vpar->picture.pp_mb[i_mb_base + *pi_mb_address] =
105 vpar_NewMacroblock( &p_vpar->vfifo )) == NULL )
107 p_vpar->picture.b_error = TRUE;
108 intf_ErrMsg("vpar error: macroblock list is empty !");
112 InitMacroblock( p_vpar, p_mb, *pi_mb_address );
114 /* Parse off macroblock_modes structure. */
115 MacroblockModes( p_vpar, p_mb );
117 if( p_vpar->mb.i_mb_type & MB_QUANT )
119 LoadQuantizerScale( p_vpar );
122 if( p_vpar->mb.i_mb_type & MB_MOTION_FORWARD )
124 (*p_vpar->sequence.pf_decode_mv)( p_vpar, 0 );
127 if( p_vpar->mb.i_mb_type & MB_MOTION_BACKWARD )
129 (*p_vpar->sequence.pf_decode_mv)( p_vpar, 1 );
132 if( p_vpar->picture.b_concealment_mv && (p_vpar->mb.i_mb_type & MB_INTRA) )
134 DumpBits( &p_vpar->bit_stream, 1 );
137 if( p_vpar->mb.i_mb_type & MB_PATTERN )
139 (*p_vpar->sequence.pf_decode_pattern)( p_vpar );
143 int pi_coded_block_pattern[2] = {0,
144 (1 << 4+2*p_vpar->sequence.i_chroma_nb_blocks) - 1};
145 p_vpar->mb.i_coded_block_pattern = pi_coded_block_pattern
146 [p_vpar->mb.i_mb_type & MB_INTRA];
149 pf_addb = ppf_addb_intra[p_vpar->mb.i_mb_type & MB_INTRA];
151 /* C'est de la merde, il faut recommencer */
153 i_x = p_mb->i_mb_x << 4;
154 i_y = p_mb->i_mb_y << 4;
156 pi_pos[0] = i_y*(p_vpar->sequence.i_width
157 << (!p_vpar->picture.b_frame_structure))
158 + (p_mb->i_structure == BOTTOM_FIELD)*p_vpar->sequence.i_width
160 pi_pos[1] = pi_pos[2] = i_y*(p_vpar->sequence.i_chroma_width
161 << (!p_vpar->picture.b_frame_structure))
162 + (p_mb->i_structure == BOTTOM_FIELD)*p_vpar->sequence.i_chroma_width
163 + (i_x >> (3-p_vpar->sequence.i_chroma_format));
164 pi_width[0] = p_vpar->sequence.i_width << (!p_vpar->picture.b_frame_structure
165 || p_vpar->mb.b_dct_type);
166 pi_width[1] = pi_width[2] = p_vpar->sequence.i_chroma_width
167 << (!p_vpar->picture.b_frame_structure || p_vpar->mb.b_dct_type);
169 /* Effectively decode blocks. */
170 for( i_b = 0, i_mask = 1 << (3 + 2*p_vpar->sequence.i_chroma_nb_blocks);
171 i_b < 4 + 2*p_vpar->sequence.i_chroma_nb_blocks; i_b++, i_mask >>= 1 )
173 if( p_vpar->mb.i_coded_block_pattern & i_mask )
175 static f_decode_block_t pppf_decode_block[2][2] =
176 { {vpar_DecodeMPEG1Non, vpar_DecodeMPEG1Intra},
177 {vpar_DecodeMPEG2Non, vpar_DecodeMPEG2Intra} };
178 static int pi_x[12] = {0,8,0,8,0,0,0,0,8,8,8,8};
179 static int pi_y[12] = {0,0,8,8,0,0,8,8,0,0,8,8};
181 {p_mb->p_picture->p_y, p_mb->p_picture->p_y,
182 p_mb->p_picture->p_y, p_mb->p_picture->p_y,
183 p_mb->p_picture->p_u, p_mb->p_picture->p_v,
184 p_mb->p_picture->p_u, p_mb->p_picture->p_v,
185 p_mb->p_picture->p_u, p_mb->p_picture->p_v,
186 p_mb->p_picture->p_u, p_mb->p_picture->p_v};
188 bzero( p_mb->ppi_blocks[i_b], 64*sizeof(elem_t) );
189 (*pppf_decode_block[p_vpar->sequence.b_mpeg2]
190 [p_vpar->mb.i_mb_type & MB_INTRA])
191 ( p_vpar, p_mb, i_b );
193 /* decode_block has already set pf_idct and pi_sparse_pos. */
194 p_mb->pf_addb[i_b] = pf_addb;
196 /* Calculate block coordinates. */
197 p_mb->p_data[i_b] = pi_data[i_b] + pi_pos[i_b >> 2]
198 + pi_y[i_b]*pi_width[i_b >> 2]
199 + (p_vpar->mb.b_dct_type & ((i_b & 2) >> 1))
200 /* INACHEVÉ parce que trop pourri ! */
204 /* Block not coded, so no IDCT, nor AddBlock */
205 p_mb->pf_addb[i_b] = vdec_DummyBlock;
206 p_mb->pf_idct[i_b] = vdec_DummyIDCT;
210 if( !( p_vpar->mb.i_mb_type & MB_INTRA ) )
212 static int pi_dc_dct_reinit[4] = {128,256,512,1024};
214 /* Reset DC predictors (7.2.1). */
215 p_vpar->slice.pi_dct_pred[0] = p_vpar->slice.pi_dct_pred[1]
216 = p_vpar->slice.pi_dct_pred[2]
217 = pi_dc_dct_reinit[p_vpar->picture.i_intra_dc_precision];
219 else if( !p_vpar->picture.b_concealment_mv )
221 /* Reset MV predictors. */
222 bzero( p_vpar->slice.pppi_pmv, 8*sizeof(int) );
225 if( (p_vpar->picture.i_coding_type == P_CODING_TYPE) &&
226 !(p_vpar->mb.i_mb_type & (MB_MOTION_FORWARD|MB_INTRA)) )
228 /* Special No-MC macroblock in P pictures (7.6.3.5). */
229 p_vpar->slice.pppi_pmv[0][0][0] = p_vpar->slice.pppi_pmv[0][0][1] =
230 p_vpar->slice.pppi_pmv[1][0][0] = p_vpar->slice.pppi_pmv[1][0][1] = 0;
232 /* motion type ?????? */
233 /* predict from field of same parity ????? */
237 /*****************************************************************************
238 * InitMacroblock : Initialize macroblock values
239 *****************************************************************************/
240 static __inline__ void InitMacroblock( vpar_thread_t * p_vpar,
241 macroblock_t * p_mb, int i_mb_address )
243 p_mb->p_picture = p_vpar->picture.p_picture;
244 p_mb->i_structure = p_vpar->picture.i_structure;
245 p_mb->i_mb_x = i_mb_address % p_vpar->sequence.i_mb_width;
246 p_mb->i_mb_y = i_mb_address / p_vpar->sequence.i_mb_width;
247 p_mb->i_chroma_nb_blocks = p_vpar->sequence.i_chroma_nb_blocks;
249 p_mb->i_lum_incr = p_vpar->picture.i_lum_incr;
250 p_mb->i_chroma_incr = p_vpar->picture.i_chroma_incr;
253 /*****************************************************************************
254 * MacroblockAddressIncrement : Get the macroblock_address_increment field
255 *****************************************************************************/
256 static __inline__ int MacroblockAddressIncrement( vpar_thread_t * p_vpar )
258 /* À pomper dans Berkeley */
261 /*****************************************************************************
262 * MacroblockModes : Get the macroblock_modes structure
263 *****************************************************************************/
264 static __inline__ void MacroblockModes( vpar_thread_t * p_vpar,
265 macroblock_t * p_mb )
267 static f_motion_t pf_motion[2][4] =
268 { {NULL, vdec_FieldRecon, vdec_16x8Recon, vdec_DMVRecon},
269 {NULL, vdec_FieldRecon, vdec_FrameRecon, vdec_DMVRecon} };
270 static int ppi_mv_count[2][4] = { {0, 1, 2, 1}, {0, 2, 1, 1} };
271 static int ppi_mv_format[2][4] = { {0, 1, 1, 1}, {0, 1, 2, 1} };
273 /* Get macroblock_type. */
274 p_vpar->mb.i_mb_type = (*p_vpar->picture.pf_macroblock_type)
275 ( vpar_thread_t * p_vpar );
277 /* SCALABILITY : warning, we don't know if spatial_temporal_weight_code
278 * has to be dropped, take care if you use scalable streams. */
279 /* DumpBits( &p_vpar->bit_stream, 2 ); */
281 if( !(p_vpar->mb.i_mb_type & (MB_MOTION_FORWARD | MB_MOTION_BACKWARD))
282 || p_vpar->picture.b_frame_pred_frame_dct )
284 /* If mb_type has neither MOTION_FORWARD nor MOTION_BACKWARD, this
285 * is useless, but also harmless. */
286 p_vpar->mb.i_motion_type = MOTION_FRAME;
290 p_vpar->mb.i_motion_type = GetBits( &p_vpar->bit_stream, 2 );
293 p_mb->f_motion = pf_motion[p_vpar->picture.b_frame_structure]
294 [p_vpar->mb.i_motion_type];
295 p_vpar->mb.i_mv_count = ppi_mv_count[p_vpar->picture.b_frame_structure]
296 [p_vpar->mb.i_motion_type];
297 p_vpar->mb.i_mv_format = ppi_mv_format[p_vpar->picture.b_frame_structure]
298 [p_vpar->mb.i_motion_type];
300 if( (p_vpar->picture.i_structure == FRAME_STRUCTURE) &&
301 (!p_vpar->picture.b_frame_pred_frame_dct) &&
302 (p_var->mb.i_mb_type & (MB_PATTERN|MB_INTRA)) )
304 p_vpar->mb.b_dct_type = GetBits( &p_vpar->bit_stream, 1 );
308 p_vpar->mb.b_dct_type = 0;
312 /*****************************************************************************
313 * vpar_IMBType : macroblock_type in I pictures
314 *****************************************************************************/
315 int vpar_IMBType( vpar_thread_t * p_vpar )
317 /* À pomper dans Berkeley */
320 /*****************************************************************************
321 * vpar_PMBType : macroblock_type in P pictures
322 *****************************************************************************/
323 int vpar_PMBType( vpar_thread_t * p_vpar )
325 /* À pomper dans Berkeley */
328 /*****************************************************************************
329 * vpar_BMBType : macroblock_type in B pictures
330 *****************************************************************************/
331 int vpar_BMBType( vpar_thread_t * p_vpar )
333 /* À pomper dans Berkeley */
336 /*****************************************************************************
337 * vpar_DMBType : macroblock_type in D pictures
338 *****************************************************************************/
339 int vpar_DMBType( vpar_thread_t * p_vpar )
341 /* À pomper dans Berkeley */
344 /*****************************************************************************
345 * vpar_CodedPattern420 : coded_block_pattern with 420 chroma
346 *****************************************************************************/
347 int vpar_CodedPattern420( vpar_thread_t * p_vpar )
349 /* À pomper dans Berkeley */
352 /*****************************************************************************
353 * vpar_CodedPattern422 : coded_block_pattern with 422 chroma
354 *****************************************************************************/
355 int vpar_CodedPattern422( vpar_thread_t * p_vpar )
357 /* À pomper dans Berkeley + attention ! y'a 2 bits en plus en MPEG2 */
360 /*****************************************************************************
361 * vpar_CodedPattern444 : coded_block_pattern with 444 chroma
362 *****************************************************************************/
363 int vpar_CodedPattern444( vpar_thread_t * p_vpar )
365 /* À pomper dans Berkeley + attention ! y'a 4 bits en plus en MPEG2 */
368 /*****************************************************************************
369 * vpar_DecodeMPEG1Non : decode MPEG-1 non-intra blocks
370 *****************************************************************************/
371 void vpar_DecodeMPEG1Non( vpar_thread_t * p_vpar, macroblock_t * p_mb, int i_b )
373 /* À pomper dans Berkeley. Pour toutes ces fonctions, il faut mettre
374 p_mb->pf_idct[i_b] à :
376 - vdec_SparseIDCT si la matrice n'a qu'un coefficient non nul.
377 Dans le deuxième cas, p_mb->pi_sparse_pos[i_b] contient le numéro
378 de ce coefficient. */
380 if( p_vpar->picture.i_coding_type == D_CODING_TYPE )
382 /* Remove end_of_macroblock (always 1, prevents startcode emulation)
383 * ISO/IEC 11172-2 section 2.4.2.7 and 2.4.3.6 */
384 DumpBits( &p_vpar->fifo, 1 );
388 /*****************************************************************************
389 * vpar_DecodeMPEG1Intra : decode MPEG-1 intra blocks
390 *****************************************************************************/
391 void vpar_DecodeMPEG1Intra( vpar_thread_t * p_vpar, macroblock_t * p_mb, int i_b )
393 /* À pomper dans Berkeley. */
395 if( p_vpar->picture.i_coding_type == D_CODING_TYPE )
397 /* Remove end_of_macroblock (always 1, prevents startcode emulation)
398 * ISO/IEC 11172-2 section 2.4.2.7 and 2.4.3.6 */
399 DumpBits( &p_vpar->fifo, 1 );
403 /*****************************************************************************
404 * vpar_DecodeMPEG2Non : decode MPEG-2 non-intra blocks
405 *****************************************************************************/
406 void vpar_DecodeMPEG2Non( vpar_thread_t * p_vpar, macroblock_t * p_mb, int i_b )
408 /* À pomper dans Berkeley. Bien sûr les matrices seront différentes... */
411 /*****************************************************************************
412 * vpar_DecodeMPEG2Intra : decode MPEG-2 intra blocks
413 *****************************************************************************/
414 void vpar_DecodeMPEG2Intra( vpar_thread_t * p_vpar, macroblock_t * p_mb, int i_b )
416 /* À pomper dans Berkeley. */