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1 : | Isibaar | 1.1 | /************************************************************************** |
2 : | * | ||
3 : | * XVID MPEG-4 VIDEO CODEC | ||
4 : | * decoder main | ||
5 : | * | ||
6 : | * This program is an implementation of a part of one or more MPEG-4 | ||
7 : | * Video tools as specified in ISO/IEC 14496-2 standard. Those intending | ||
8 : | * to use this software module in hardware or software products are | ||
9 : | * advised that its use may infringe existing patents or copyrights, and | ||
10 : | * any such use would be at such party's own risk. The original | ||
11 : | * developer of this software module and his/her company, and subsequent | ||
12 : | * editors and their companies, will have no liability for use of this | ||
13 : | * software or modifications or derivatives thereof. | ||
14 : | * | ||
15 : | Isibaar | 1.3 | * This program is xvid_free software; you can redistribute it and/or modify |
16 : | Isibaar | 1.1 | * it under the terms of the GNU General Public License as published by |
17 : | Isibaar | 1.3 | * the xvid_free Software Foundation; either version 2 of the License, or |
18 : | Isibaar | 1.1 | * (at your option) any later version. |
19 : | * | ||
20 : | * This program is distributed in the hope that it will be useful, | ||
21 : | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
22 : | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
23 : | * GNU General Public License for more details. | ||
24 : | * | ||
25 : | * You should have received a copy of the GNU General Public License | ||
26 : | Isibaar | 1.3 | * along with this program; if not, write to the xvid_free Software |
27 : | Isibaar | 1.1 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
28 : | * | ||
29 : | *************************************************************************/ | ||
30 : | |||
31 : | /************************************************************************** | ||
32 : | * | ||
33 : | * History: | ||
34 : | * | ||
35 : | h | 1.5 | * 26.03.2002 interlacing support - moved transfers outside decode loop |
36 : | Isibaar | 1.1 | * 26.12.2001 decoder_mbinter: dequant/idct moved within if(coded) block |
37 : | * 22.12.2001 block based interpolation | ||
38 : | * 01.12.2001 inital version; (c)2001 peter ross <pross@cs.rmit.edu.au> | ||
39 : | * | ||
40 : | *************************************************************************/ | ||
41 : | |||
42 : | #include <stdlib.h> | ||
43 : | #include <string.h> // memset | ||
44 : | |||
45 : | #include "xvid.h" | ||
46 : | #include "portab.h" | ||
47 : | |||
48 : | #include "decoder.h" | ||
49 : | #include "bitstream/bitstream.h" | ||
50 : | #include "bitstream/mbcoding.h" | ||
51 : | |||
52 : | #include "quant/quant_h263.h" | ||
53 : | #include "quant/quant_mpeg4.h" | ||
54 : | #include "dct/idct.h" | ||
55 : | #include "dct/fdct.h" | ||
56 : | #include "utils/mem_transfer.h" | ||
57 : | #include "image/interpolate8x8.h" | ||
58 : | h | 1.5 | #include "utils/mbfunctions.h" |
59 : | Isibaar | 1.1 | |
60 : | #include "bitstream/mbcoding.h" | ||
61 : | #include "prediction/mbprediction.h" | ||
62 : | #include "utils/timer.h" | ||
63 : | #include "utils/emms.h" | ||
64 : | |||
65 : | #include "image/image.h" | ||
66 : | #include "image/colorspace.h" | ||
67 : | Isibaar | 1.3 | #include "utils/mem_align.h" |
68 : | Isibaar | 1.1 | |
69 : | int decoder_create(XVID_DEC_PARAM * param) | ||
70 : | { | ||
71 : | DECODER * dec; | ||
72 : | |||
73 : | Isibaar | 1.4 | dec = xvid_malloc(sizeof(DECODER), CACHE_LINE); |
74 : | Isibaar | 1.1 | if (dec == NULL) |
75 : | { | ||
76 : | return XVID_ERR_MEMORY; | ||
77 : | } | ||
78 : | param->handle = dec; | ||
79 : | |||
80 : | dec->width = param->width; | ||
81 : | dec->height = param->height; | ||
82 : | |||
83 : | dec->mb_width = (dec->width + 15) / 16; | ||
84 : | dec->mb_height = (dec->height + 15) / 16; | ||
85 : | |||
86 : | dec->edged_width = 16 * dec->mb_width + 2 * EDGE_SIZE; | ||
87 : | dec->edged_height = 16 * dec->mb_height + 2 * EDGE_SIZE; | ||
88 : | |||
89 : | if (image_create(&dec->cur, dec->edged_width, dec->edged_height)) | ||
90 : | { | ||
91 : | Isibaar | 1.3 | xvid_free(dec); |
92 : | Isibaar | 1.1 | return XVID_ERR_MEMORY; |
93 : | } | ||
94 : | |||
95 : | if (image_create(&dec->refn, dec->edged_width, dec->edged_height)) | ||
96 : | { | ||
97 : | image_destroy(&dec->cur, dec->edged_width, dec->edged_height); | ||
98 : | Isibaar | 1.3 | xvid_free(dec); |
99 : | Isibaar | 1.1 | return XVID_ERR_MEMORY; |
100 : | } | ||
101 : | |||
102 : | Isibaar | 1.4 | dec->mbs = xvid_malloc(sizeof(MACROBLOCK) * dec->mb_width * dec->mb_height, CACHE_LINE); |
103 : | Isibaar | 1.1 | if (dec->mbs == NULL) |
104 : | { | ||
105 : | image_destroy(&dec->cur, dec->edged_width, dec->edged_height); | ||
106 : | Isibaar | 1.3 | xvid_free(dec); |
107 : | Isibaar | 1.1 | return XVID_ERR_MEMORY; |
108 : | } | ||
109 : | |||
110 : | init_timer(); | ||
111 : | create_vlc_tables(); | ||
112 : | |||
113 : | return XVID_ERR_OK; | ||
114 : | } | ||
115 : | |||
116 : | |||
117 : | int decoder_destroy(DECODER * dec) | ||
118 : | { | ||
119 : | Isibaar | 1.3 | xvid_free(dec->mbs); |
120 : | Isibaar | 1.1 | image_destroy(&dec->refn, dec->edged_width, dec->edged_height); |
121 : | image_destroy(&dec->cur, dec->edged_width, dec->edged_height); | ||
122 : | Isibaar | 1.3 | xvid_free(dec); |
123 : | Isibaar | 1.1 | |
124 : | destroy_vlc_tables(); | ||
125 : | |||
126 : | write_timer(); | ||
127 : | return XVID_ERR_OK; | ||
128 : | } | ||
129 : | |||
130 : | |||
131 : | |||
132 : | static const int32_t dquant_table[4] = | ||
133 : | { | ||
134 : | -1, -2, 1, 2 | ||
135 : | }; | ||
136 : | |||
137 : | |||
138 : | // decode an intra macroblock | ||
139 : | |||
140 : | h | 1.5 | void decoder_mbintra(DECODER * dec, |
141 : | MACROBLOCK * pMB, | ||
142 : | const uint32_t x_pos, | ||
143 : | const uint32_t y_pos, | ||
144 : | const uint32_t acpred_flag, | ||
145 : | const uint32_t cbp, | ||
146 : | Bitstream * bs, | ||
147 : | const uint32_t quant, | ||
148 : | const uint32_t intra_dc_threshold) | ||
149 : | Isibaar | 1.1 | { |
150 : | canard | 1.6 | #ifdef LINUX |
151 : | DECLARE_ALIGNED_MATRIX(block,6,64,int16_t,16); | ||
152 : | DECLARE_ALIGNED_MATRIX(data,6,64,int16_t,16); | ||
153 : | #else | ||
154 : | h | 1.5 | CACHE_ALIGN int16_t block[6][64]; |
155 : | CACHE_ALIGN int16_t data[6][64]; | ||
156 : | canard | 1.6 | #endif |
157 : | h | 1.5 | const uint32_t stride = dec->edged_width; |
158 : | uint32_t i; | ||
159 : | uint32_t iQuant = pMB->quant; | ||
160 : | uint8_t *pY_Cur, *pU_Cur, *pV_Cur; | ||
161 : | |||
162 : | pY_Cur = dec->cur.y + (y_pos << 4) * stride + (x_pos << 4); | ||
163 : | pU_Cur = dec->cur.u + (y_pos << 3) * (stride >> 1) + (x_pos << 3); | ||
164 : | pV_Cur = dec->cur.v + (y_pos << 3) * (stride >> 1) + (x_pos << 3); | ||
165 : | |||
166 : | canard | 1.6 | #ifdef LINUX |
167 : | memset(block,0,sizeof(int16_t)*6*64); | ||
168 : | #else | ||
169 : | h | 1.5 | memset(block, 0, sizeof(block)); // clear |
170 : | canard | 1.6 | #endif |
171 : | h | 1.5 | |
172 : | for (i = 0; i < 6; i++) | ||
173 : | Isibaar | 1.1 | { |
174 : | h | 1.5 | uint32_t iDcScaler = get_dc_scaler(iQuant, i < 4); |
175 : | Isibaar | 1.1 | int16_t predictors[8]; |
176 : | int start_coeff; | ||
177 : | |||
178 : | start_timer(); | ||
179 : | h | 1.5 | predict_acdc(dec->mbs, x_pos, y_pos, dec->mb_width, i, block[i], iQuant, iDcScaler, predictors); |
180 : | Isibaar | 1.1 | if (!acpred_flag) |
181 : | { | ||
182 : | h | 1.5 | pMB->acpred_directions[i] = 0; |
183 : | Isibaar | 1.1 | } |
184 : | stop_prediction_timer(); | ||
185 : | |||
186 : | if (quant < intra_dc_threshold) | ||
187 : | { | ||
188 : | int dc_size; | ||
189 : | int dc_dif; | ||
190 : | |||
191 : | h | 1.5 | dc_size = i < 4 ? get_dc_size_lum(bs) : get_dc_size_chrom(bs); |
192 : | Isibaar | 1.1 | dc_dif = dc_size ? get_dc_dif(bs, dc_size) : 0 ; |
193 : | |||
194 : | if (dc_size > 8) | ||
195 : | { | ||
196 : | BitstreamSkip(bs, 1); // marker | ||
197 : | } | ||
198 : | |||
199 : | h | 1.5 | block[i][0] = dc_dif; |
200 : | Isibaar | 1.1 | start_coeff = 1; |
201 : | } | ||
202 : | else | ||
203 : | { | ||
204 : | start_coeff = 0; | ||
205 : | } | ||
206 : | |||
207 : | start_timer(); | ||
208 : | h | 1.5 | if (cbp & (1 << (5-i))) // coded |
209 : | Isibaar | 1.1 | { |
210 : | h | 1.5 | get_intra_block(bs, block[i], pMB->acpred_directions[i], start_coeff); |
211 : | Isibaar | 1.1 | } |
212 : | stop_coding_timer(); | ||
213 : | |||
214 : | start_timer(); | ||
215 : | h | 1.5 | add_acdc(pMB, i, block[i], iDcScaler, predictors); |
216 : | Isibaar | 1.1 | stop_prediction_timer(); |
217 : | |||
218 : | start_timer(); | ||
219 : | if (dec->quant_type == 0) | ||
220 : | { | ||
221 : | h | 1.5 | dequant_intra(data[i], block[i], iQuant, iDcScaler); |
222 : | Isibaar | 1.1 | } |
223 : | else | ||
224 : | { | ||
225 : | h | 1.5 | dequant4_intra(data[i], block[i], iQuant, iDcScaler); |
226 : | Isibaar | 1.1 | } |
227 : | stop_iquant_timer(); | ||
228 : | |||
229 : | start_timer(); | ||
230 : | h | 1.5 | idct(data[i]); |
231 : | Isibaar | 1.1 | stop_idct_timer(); |
232 : | h | 1.5 | } |
233 : | Isibaar | 1.1 | |
234 : | h | 1.5 | start_timer(); |
235 : | if (dec->interlacing && pMB->field_dct) | ||
236 : | { | ||
237 : | MBFieldToFrame(data); | ||
238 : | Isibaar | 1.1 | } |
239 : | h | 1.5 | stop_interlacing_timer(); |
240 : | |||
241 : | start_timer(); | ||
242 : | transfer_16to8copy(pY_Cur, data[0], stride); | ||
243 : | transfer_16to8copy(pY_Cur + 8, data[1], stride); | ||
244 : | transfer_16to8copy(pY_Cur + 8 * stride, data[2], stride); | ||
245 : | transfer_16to8copy(pY_Cur + 8 + 8 * stride, data[3], stride); | ||
246 : | transfer_16to8copy(pU_Cur, data[4], stride / 2); | ||
247 : | transfer_16to8copy(pV_Cur, data[5], stride / 2); | ||
248 : | stop_transfer_timer(); | ||
249 : | Isibaar | 1.1 | } |
250 : | |||
251 : | |||
252 : | |||
253 : | |||
254 : | |||
255 : | #define SIGN(X) (((X)>0)?1:-1) | ||
256 : | #define ABS(X) (((X)>0)?(X):-(X)) | ||
257 : | static const uint32_t roundtab[16] = | ||
258 : | { 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2 }; | ||
259 : | |||
260 : | |||
261 : | // decode an inter macroblock | ||
262 : | |||
263 : | h | 1.5 | void decoder_mbinter(DECODER * dec, |
264 : | const MACROBLOCK * pMB, | ||
265 : | const uint32_t x_pos, | ||
266 : | const uint32_t y_pos, | ||
267 : | const uint32_t acpred_flag, | ||
268 : | const uint32_t cbp, | ||
269 : | Bitstream * bs, | ||
270 : | const uint32_t quant, | ||
271 : | const uint32_t rounding) | ||
272 : | Isibaar | 1.1 | { |
273 : | canard | 1.6 | #ifdef LINUX |
274 : | DECLARE_ALIGNED_MATRIX(block,6,64,int16_t,16); | ||
275 : | DECLARE_ALIGNED_MATRIX(data,6,64,int16_t,16); | ||
276 : | #else | ||
277 : | h | 1.5 | CACHE_ALIGN int16_t block[6][64]; |
278 : | CACHE_ALIGN int16_t data[6][64]; | ||
279 : | canard | 1.6 | #endif |
280 : | h | 1.5 | |
281 : | Isibaar | 1.1 | const uint32_t stride = dec->edged_width; |
282 : | const uint32_t stride2 = dec->edged_width / 2; | ||
283 : | h | 1.5 | uint32_t i; |
284 : | uint32_t iQuant = pMB->quant; | ||
285 : | uint8_t *pY_Cur, *pU_Cur, *pV_Cur; | ||
286 : | Isibaar | 1.1 | int uv_dx, uv_dy; |
287 : | |||
288 : | h | 1.5 | pY_Cur = dec->cur.y + (y_pos << 4) * stride + (x_pos << 4); |
289 : | pU_Cur = dec->cur.u + (y_pos << 3) * (stride >> 1) + (x_pos << 3); | ||
290 : | pV_Cur = dec->cur.v + (y_pos << 3) * (stride >> 1) + (x_pos << 3); | ||
291 : | |||
292 : | if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) | ||
293 : | Isibaar | 1.1 | { |
294 : | h | 1.5 | uv_dx = pMB->mvs[0].x; |
295 : | uv_dy = pMB->mvs[0].y; | ||
296 : | Isibaar | 1.1 | |
297 : | uv_dx = (uv_dx & 3) ? (uv_dx >> 1) | 1 : uv_dx / 2; | ||
298 : | uv_dy = (uv_dy & 3) ? (uv_dy >> 1) | 1 : uv_dy / 2; | ||
299 : | } | ||
300 : | else | ||
301 : | { | ||
302 : | int sum; | ||
303 : | h | 1.5 | sum = pMB->mvs[0].x + pMB->mvs[1].x + pMB->mvs[2].x + pMB->mvs[3].x; |
304 : | Isibaar | 1.1 | uv_dx = (sum == 0 ? 0 : SIGN(sum) * (roundtab[ABS(sum) % 16] + (ABS(sum) / 16) * 2) ); |
305 : | |||
306 : | h | 1.5 | sum = pMB->mvs[0].y + pMB->mvs[1].y + pMB->mvs[2].y + pMB->mvs[3].y; |
307 : | Isibaar | 1.1 | uv_dy = (sum == 0 ? 0 : SIGN(sum) * (roundtab[ABS(sum) % 16] + (ABS(sum) / 16) * 2) ); |
308 : | } | ||
309 : | |||
310 : | start_timer(); | ||
311 : | h | 1.5 | interpolate8x8_switch(dec->cur.y, dec->refn.y, 16*x_pos, 16*y_pos , pMB->mvs[0].x, pMB->mvs[0].y, stride, rounding); |
312 : | interpolate8x8_switch(dec->cur.y, dec->refn.y, 16*x_pos + 8, 16*y_pos , pMB->mvs[1].x, pMB->mvs[1].y, stride, rounding); | ||
313 : | interpolate8x8_switch(dec->cur.y, dec->refn.y, 16*x_pos, 16*y_pos + 8, pMB->mvs[2].x, pMB->mvs[2].y, stride, rounding); | ||
314 : | interpolate8x8_switch(dec->cur.y, dec->refn.y, 16*x_pos + 8, 16*y_pos + 8, pMB->mvs[3].x, pMB->mvs[3].y, stride, rounding); | ||
315 : | interpolate8x8_switch(dec->cur.u, dec->refn.u, 8*x_pos, 8*y_pos, uv_dx, uv_dy, stride2, rounding); | ||
316 : | interpolate8x8_switch(dec->cur.v, dec->refn.v, 8*x_pos, 8*y_pos, uv_dx, uv_dy, stride2, rounding); | ||
317 : | Isibaar | 1.1 | stop_comp_timer(); |
318 : | |||
319 : | h | 1.5 | for (i = 0; i < 6; i++) |
320 : | Isibaar | 1.1 | { |
321 : | h | 1.5 | if (cbp & (1 << (5-i))) // coded |
322 : | Isibaar | 1.1 | { |
323 : | h | 1.5 | memset(block[i], 0, 64 * sizeof(int16_t)); // clear |
324 : | Isibaar | 1.1 | |
325 : | start_timer(); | ||
326 : | h | 1.5 | get_inter_block(bs, block[i]); |
327 : | Isibaar | 1.1 | stop_coding_timer(); |
328 : | |||
329 : | start_timer(); | ||
330 : | if (dec->quant_type == 0) | ||
331 : | { | ||
332 : | h | 1.5 | dequant_inter(data[i], block[i], iQuant); |
333 : | Isibaar | 1.1 | } |
334 : | else | ||
335 : | { | ||
336 : | h | 1.5 | dequant4_inter(data[i], block[i], iQuant); |
337 : | Isibaar | 1.1 | } |
338 : | stop_iquant_timer(); | ||
339 : | |||
340 : | start_timer(); | ||
341 : | h | 1.5 | idct(data[i]); |
342 : | Isibaar | 1.1 | stop_idct_timer(); |
343 : | h | 1.5 | } |
344 : | } | ||
345 : | Isibaar | 1.1 | |
346 : | h | 1.5 | start_timer(); |
347 : | if (pMB->field_dct) | ||
348 : | { | ||
349 : | MBFieldToFrame(data); | ||
350 : | Isibaar | 1.1 | } |
351 : | h | 1.5 | stop_interlacing_timer(); |
352 : | |||
353 : | start_timer(); | ||
354 : | if (cbp & 32) | ||
355 : | transfer_16to8add(pY_Cur, data[0], stride); | ||
356 : | if (cbp & 16) | ||
357 : | transfer_16to8add(pY_Cur + 8, data[1], stride); | ||
358 : | if (cbp & 8) | ||
359 : | transfer_16to8add(pY_Cur + 8 * stride, data[2], stride); | ||
360 : | if (cbp & 4) | ||
361 : | transfer_16to8add(pY_Cur + 8 + 8 * stride, data[3], stride); | ||
362 : | if (cbp & 2) | ||
363 : | transfer_16to8add(pU_Cur, data[4], stride / 2); | ||
364 : | if (cbp & 1) | ||
365 : | transfer_16to8add(pV_Cur, data[5], stride / 2); | ||
366 : | stop_transfer_timer(); | ||
367 : | Isibaar | 1.1 | } |
368 : | |||
369 : | |||
370 : | void decoder_iframe(DECODER * dec, Bitstream * bs, int quant, int intra_dc_threshold) | ||
371 : | { | ||
372 : | uint32_t x, y; | ||
373 : | |||
374 : | for (y = 0; y < dec->mb_height; y++) | ||
375 : | { | ||
376 : | for (x = 0; x < dec->mb_width; x++) | ||
377 : | { | ||
378 : | MACROBLOCK * mb = &dec->mbs[y*dec->mb_width + x]; | ||
379 : | |||
380 : | uint32_t mcbpc; | ||
381 : | uint32_t cbpc; | ||
382 : | uint32_t acpred_flag; | ||
383 : | uint32_t cbpy; | ||
384 : | uint32_t cbp; | ||
385 : | |||
386 : | mcbpc = get_mcbpc_intra(bs); | ||
387 : | mb->mode = mcbpc & 7; | ||
388 : | cbpc = (mcbpc >> 4); | ||
389 : | |||
390 : | acpred_flag = BitstreamGetBit(bs); | ||
391 : | |||
392 : | if (mb->mode == MODE_STUFFING) | ||
393 : | { | ||
394 : | DEBUG("-- STUFFING ?"); | ||
395 : | continue; | ||
396 : | } | ||
397 : | |||
398 : | cbpy = get_cbpy(bs, 1); | ||
399 : | cbp = (cbpy << 2) | cbpc; | ||
400 : | |||
401 : | if (mb->mode == MODE_INTRA_Q) | ||
402 : | { | ||
403 : | quant += dquant_table[BitstreamGetBits(bs,2)]; | ||
404 : | if (quant > 31) | ||
405 : | { | ||
406 : | quant = 31; | ||
407 : | } | ||
408 : | else if (quant < 1) | ||
409 : | { | ||
410 : | quant = 1; | ||
411 : | } | ||
412 : | } | ||
413 : | mb->quant = quant; | ||
414 : | h | 1.5 | |
415 : | if (dec->interlacing) | ||
416 : | { | ||
417 : | mb->field_dct = BitstreamGetBit(bs); | ||
418 : | DEBUG1("deci: field_dct: ", mb->field_dct); | ||
419 : | } | ||
420 : | Isibaar | 1.1 | |
421 : | decoder_mbintra(dec, mb, x, y, acpred_flag, cbp, bs, quant, intra_dc_threshold); | ||
422 : | } | ||
423 : | } | ||
424 : | } | ||
425 : | |||
426 : | |||
427 : | void get_motion_vector(DECODER *dec, Bitstream *bs, int x, int y, int k, VECTOR * mv, int fcode) | ||
428 : | { | ||
429 : | int scale_fac = 1 << (fcode - 1); | ||
430 : | int high = (32 * scale_fac) - 1; | ||
431 : | int low = ((-32) * scale_fac); | ||
432 : | int range = (64 * scale_fac); | ||
433 : | |||
434 : | VECTOR pmv[4]; | ||
435 : | uint32_t psad[4]; | ||
436 : | |||
437 : | int mv_x, mv_y; | ||
438 : | int pmv_x, pmv_y; | ||
439 : | |||
440 : | |||
441 : | get_pmvdata(dec->mbs, x, y, dec->mb_width, k, pmv, psad); | ||
442 : | |||
443 : | pmv_x = pmv[0].x; | ||
444 : | pmv_y = pmv[0].y; | ||
445 : | |||
446 : | mv_x = get_mv(bs, fcode); | ||
447 : | mv_y = get_mv(bs, fcode); | ||
448 : | |||
449 : | mv_x += pmv_x; | ||
450 : | mv_y += pmv_y; | ||
451 : | |||
452 : | if (mv_x < low) | ||
453 : | { | ||
454 : | mv_x += range; | ||
455 : | } | ||
456 : | else if (mv_x > high) | ||
457 : | { | ||
458 : | mv_x -= range; | ||
459 : | } | ||
460 : | |||
461 : | if (mv_y < low) | ||
462 : | { | ||
463 : | mv_y += range; | ||
464 : | } | ||
465 : | else if (mv_y > high) | ||
466 : | { | ||
467 : | mv_y -= range; | ||
468 : | } | ||
469 : | |||
470 : | mv->x = mv_x; | ||
471 : | mv->y = mv_y; | ||
472 : | |||
473 : | } | ||
474 : | |||
475 : | |||
476 : | void decoder_pframe(DECODER * dec, Bitstream * bs, int rounding, int quant, int fcode, int intra_dc_threshold) | ||
477 : | { | ||
478 : | uint32_t x, y; | ||
479 : | |||
480 : | image_swap(&dec->cur, &dec->refn); | ||
481 : | |||
482 : | start_timer(); | ||
483 : | h | 1.5 | image_setedges(&dec->refn, dec->edged_width, dec->edged_height, dec->width, dec->height, dec->interlacing); |
484 : | Isibaar | 1.1 | stop_edges_timer(); |
485 : | |||
486 : | for (y = 0; y < dec->mb_height; y++) | ||
487 : | { | ||
488 : | for (x = 0; x < dec->mb_width; x++) | ||
489 : | { | ||
490 : | MACROBLOCK * mb = &dec->mbs[y*dec->mb_width + x]; | ||
491 : | |||
492 : | if (!BitstreamGetBit(bs)) // not_coded | ||
493 : | { | ||
494 : | uint32_t mcbpc; | ||
495 : | uint32_t cbpc; | ||
496 : | uint32_t acpred_flag; | ||
497 : | uint32_t cbpy; | ||
498 : | uint32_t cbp; | ||
499 : | uint32_t intra; | ||
500 : | |||
501 : | mcbpc = get_mcbpc_inter(bs); | ||
502 : | mb->mode = mcbpc & 7; | ||
503 : | cbpc = (mcbpc >> 4); | ||
504 : | edgomez | 1.2 | acpred_flag = 0; |
505 : | Isibaar | 1.1 | |
506 : | intra = (mb->mode == MODE_INTRA || mb->mode == MODE_INTRA_Q); | ||
507 : | |||
508 : | if (intra) | ||
509 : | { | ||
510 : | acpred_flag = BitstreamGetBit(bs); | ||
511 : | } | ||
512 : | |||
513 : | if (mb->mode == MODE_STUFFING) | ||
514 : | { | ||
515 : | DEBUG("-- STUFFING ?"); | ||
516 : | continue; | ||
517 : | } | ||
518 : | |||
519 : | cbpy = get_cbpy(bs, intra); | ||
520 : | cbp = (cbpy << 2) | cbpc; | ||
521 : | |||
522 : | if (mb->mode == MODE_INTER_Q || mb->mode == MODE_INTRA_Q) | ||
523 : | { | ||
524 : | quant += dquant_table[BitstreamGetBits(bs,2)]; | ||
525 : | if (quant > 31) | ||
526 : | { | ||
527 : | quant = 31; | ||
528 : | } | ||
529 : | else if (mb->quant < 1) | ||
530 : | { | ||
531 : | quant = 1; | ||
532 : | } | ||
533 : | } | ||
534 : | mb->quant = quant; | ||
535 : | h | 1.5 | |
536 : | if (dec->interlacing) | ||
537 : | { | ||
538 : | mb->field_dct = BitstreamGetBit(bs); | ||
539 : | DEBUG1("decp: field_dct: ", mb->field_dct); | ||
540 : | |||
541 : | if (mb->mode == MODE_INTER || mb->mode == MODE_INTER_Q) | ||
542 : | { | ||
543 : | mb->field_pred = BitstreamGetBit(bs); | ||
544 : | DEBUG1("decp: field_pred: ", mb->field_pred); | ||
545 : | |||
546 : | if (mb->field_pred) | ||
547 : | { | ||
548 : | mb->field_for_top = BitstreamGetBit(bs); | ||
549 : | DEBUG1("decp: field_for_top: ", mb->field_for_top); | ||
550 : | mb->field_for_bot = BitstreamGetBit(bs); | ||
551 : | DEBUG1("decp: field_for_bot: ", mb->field_for_bot); | ||
552 : | } | ||
553 : | } | ||
554 : | } | ||
555 : | |||
556 : | Isibaar | 1.1 | if (mb->mode == MODE_INTER || mb->mode == MODE_INTER_Q) |
557 : | { | ||
558 : | h | 1.5 | if (dec->interlacing && mb->field_pred) |
559 : | { | ||
560 : | get_motion_vector(dec, bs, x, y, 0, &mb->mvs[0], fcode); | ||
561 : | get_motion_vector(dec, bs, x, y, 0, &mb->mvs[1], fcode); | ||
562 : | } | ||
563 : | else | ||
564 : | { | ||
565 : | get_motion_vector(dec, bs, x, y, 0, &mb->mvs[0], fcode); | ||
566 : | mb->mvs[1].x = mb->mvs[2].x = mb->mvs[3].x = mb->mvs[0].x; | ||
567 : | mb->mvs[1].y = mb->mvs[2].y = mb->mvs[3].y = mb->mvs[0].y; | ||
568 : | } | ||
569 : | Isibaar | 1.1 | } |
570 : | else if (mb->mode == MODE_INTER4V /* || mb->mode == MODE_INTER4V_Q */) | ||
571 : | { | ||
572 : | get_motion_vector(dec, bs, x, y, 0, &mb->mvs[0], fcode); | ||
573 : | get_motion_vector(dec, bs, x, y, 1, &mb->mvs[1], fcode); | ||
574 : | get_motion_vector(dec, bs, x, y, 2, &mb->mvs[2], fcode); | ||
575 : | get_motion_vector(dec, bs, x, y, 3, &mb->mvs[3], fcode); | ||
576 : | } | ||
577 : | else // MODE_INTRA, MODE_INTRA_Q | ||
578 : | { | ||
579 : | mb->mvs[0].x = mb->mvs[1].x = mb->mvs[2].x = mb->mvs[3].x = 0; | ||
580 : | mb->mvs[0].y = mb->mvs[1].y = mb->mvs[2].y = mb->mvs[3].y = 0; | ||
581 : | decoder_mbintra(dec, mb, x, y, acpred_flag, cbp, bs, quant, intra_dc_threshold); | ||
582 : | continue; | ||
583 : | } | ||
584 : | |||
585 : | decoder_mbinter(dec, mb, x, y, acpred_flag, cbp, bs, quant, rounding); | ||
586 : | } | ||
587 : | else // not coded | ||
588 : | { | ||
589 : | |||
590 : | mb->mode = MODE_NOT_CODED; | ||
591 : | mb->mvs[0].x = mb->mvs[1].x = mb->mvs[2].x = mb->mvs[3].x = 0; | ||
592 : | mb->mvs[0].y = mb->mvs[1].y = mb->mvs[2].y = mb->mvs[3].y = 0; | ||
593 : | |||
594 : | // copy macroblock directly from ref to cur | ||
595 : | |||
596 : | start_timer(); | ||
597 : | |||
598 : | transfer8x8_copy(dec->cur.y + (16*y)*dec->edged_width + (16*x), | ||
599 : | dec->refn.y + (16*y)*dec->edged_width + (16*x), | ||
600 : | dec->edged_width); | ||
601 : | |||
602 : | transfer8x8_copy(dec->cur.y + (16*y)*dec->edged_width + (16*x+8), | ||
603 : | dec->refn.y + (16*y)*dec->edged_width + (16*x+8), | ||
604 : | dec->edged_width); | ||
605 : | |||
606 : | transfer8x8_copy(dec->cur.y + (16*y+8)*dec->edged_width + (16*x), | ||
607 : | dec->refn.y + (16*y+8)*dec->edged_width + (16*x), | ||
608 : | dec->edged_width); | ||
609 : | |||
610 : | transfer8x8_copy(dec->cur.y + (16*y+8)*dec->edged_width + (16*x+8), | ||
611 : | dec->refn.y + (16*y+8)*dec->edged_width + (16*x+8), | ||
612 : | dec->edged_width); | ||
613 : | |||
614 : | transfer8x8_copy(dec->cur.u + (8*y)*dec->edged_width/2 + (8*x), | ||
615 : | dec->refn.u + (8*y)*dec->edged_width/2 + (8*x), | ||
616 : | dec->edged_width/2); | ||
617 : | |||
618 : | transfer8x8_copy(dec->cur.v + (8*y)*dec->edged_width/2 + (8*x), | ||
619 : | dec->refn.v + (8*y)*dec->edged_width/2 + (8*x), | ||
620 : | dec->edged_width/2); | ||
621 : | |||
622 : | stop_transfer_timer(); | ||
623 : | } | ||
624 : | } | ||
625 : | } | ||
626 : | } | ||
627 : | |||
628 : | int decoder_decode(DECODER * dec, XVID_DEC_FRAME * frame) | ||
629 : | { | ||
630 : | Bitstream bs; | ||
631 : | uint32_t rounding; | ||
632 : | uint32_t quant; | ||
633 : | uint32_t fcode; | ||
634 : | uint32_t intra_dc_threshold; | ||
635 : | |||
636 : | start_global_timer(); | ||
637 : | |||
638 : | BitstreamInit(&bs, frame->bitstream, frame->length); | ||
639 : | |||
640 : | switch (BitstreamReadHeaders(&bs, dec, &rounding, &quant, &fcode, &intra_dc_threshold)) | ||
641 : | { | ||
642 : | case P_VOP : | ||
643 : | decoder_pframe(dec, &bs, rounding, quant, fcode, intra_dc_threshold); | ||
644 : | break; | ||
645 : | |||
646 : | case I_VOP : | ||
647 : | //DEBUG1("",intra_dc_threshold); | ||
648 : | decoder_iframe(dec, &bs, quant, intra_dc_threshold); | ||
649 : | break; | ||
650 : | |||
651 : | case B_VOP : // ignore | ||
652 : | break; | ||
653 : | |||
654 : | case N_VOP : // vop not coded | ||
655 : | break; | ||
656 : | |||
657 : | default : | ||
658 : | return XVID_ERR_FAIL; | ||
659 : | } | ||
660 : | |||
661 : | frame->length = BitstreamPos(&bs) / 8; | ||
662 : | |||
663 : | start_timer(); | ||
664 : | image_output(&dec->cur, dec->width, dec->height, dec->edged_width, | ||
665 : | frame->image, frame->stride, frame->colorspace); | ||
666 : | stop_conv_timer(); | ||
667 : | |||
668 : | emms(); | ||
669 : | |||
670 : | stop_global_timer(); | ||
671 : | |||
672 : | return XVID_ERR_OK; | ||
673 : | } |
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