Commit | Line | Data |
---|---|---|
5d2231ee FB |
1 | /* |
2 | * DV decoder | |
3 | * Copyright (c) 2002 Fabrice Bellard. | |
4 | * | |
4fa1c4fa RS |
5 | * DV encoder |
6 | * Copyright (c) 2003 Roman Shaposhnik. | |
7 | * | |
8 | * Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth | |
9 | * of DV technical info. | |
10 | * | |
5d2231ee FB |
11 | * This library is free software; you can redistribute it and/or |
12 | * modify it under the terms of the GNU Lesser General Public | |
13 | * License as published by the Free Software Foundation; either | |
14 | * version 2 of the License, or (at your option) any later version. | |
15 | * | |
16 | * This library is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * Lesser General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU Lesser General Public | |
22 | * License along with this library; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
24 | */ | |
983e3246 MN |
25 | |
26 | /** | |
27 | * @file dv.c | |
4fa1c4fa | 28 | * DV codec. |
983e3246 | 29 | */ |
5d2231ee FB |
30 | #include "avcodec.h" |
31 | #include "dsputil.h" | |
32 | #include "mpegvideo.h" | |
33 | #include "simple_idct.h" | |
7458ccbb | 34 | #include "dvdata.h" |
5d2231ee FB |
35 | |
36 | typedef struct DVVideoDecodeContext { | |
7458ccbb | 37 | const DVprofile* sys; |
5d2231ee | 38 | GetBitContext gb; |
492cd3a9 | 39 | AVFrame picture; |
5d2231ee | 40 | DCTELEM block[5*6][64] __align8; |
7458ccbb RS |
41 | |
42 | /* FIXME: the following is extracted from DSP */ | |
0c1a9eda ZK |
43 | uint8_t dv_zigzag[2][64]; |
44 | uint8_t idct_permutation[64]; | |
7458ccbb RS |
45 | void (*get_pixels)(DCTELEM *block, const uint8_t *pixels, int line_size); |
46 | void (*fdct)(DCTELEM *block); | |
47 | ||
5d2231ee | 48 | /* XXX: move it to static storage ? */ |
0c1a9eda ZK |
49 | uint8_t dv_shift[2][22][64]; |
50 | void (*idct_put[2])(uint8_t *dest, int line_size, DCTELEM *block); | |
5d2231ee FB |
51 | } DVVideoDecodeContext; |
52 | ||
7458ccbb | 53 | #define TEX_VLC_BITS 9 |
5d2231ee FB |
54 | /* XXX: also include quantization */ |
55 | static RL_VLC_ELEM *dv_rl_vlc[1]; | |
7458ccbb | 56 | static VLC_TYPE dv_vlc_codes[15][23]; |
5d2231ee FB |
57 | |
58 | static void dv_build_unquantize_tables(DVVideoDecodeContext *s) | |
59 | { | |
7be166e4 | 60 | int i, q, j; |
5d2231ee FB |
61 | |
62 | /* NOTE: max left shift is 6 */ | |
7be166e4 FB |
63 | for(q = 0; q < 22; q++) { |
64 | /* 88 unquant */ | |
65 | for(i = 1; i < 64; i++) { | |
66 | /* 88 table */ | |
67 | j = s->idct_permutation[i]; | |
68 | s->dv_shift[0][q][j] = | |
69 | dv_quant_shifts[q][dv_88_areas[i]] + 1; | |
70 | } | |
71 | ||
72 | /* 248 unquant */ | |
73 | for(i = 1; i < 64; i++) { | |
74 | /* 248 table */ | |
75 | s->dv_shift[1][q][i] = | |
76 | dv_quant_shifts[q][dv_248_areas[i]] + 1; | |
5d2231ee FB |
77 | } |
78 | } | |
79 | } | |
80 | ||
4fa1c4fa | 81 | static int dvvideo_init(AVCodecContext *avctx) |
5d2231ee FB |
82 | { |
83 | DVVideoDecodeContext *s = avctx->priv_data; | |
7be166e4 | 84 | MpegEncContext s2; |
7604246d | 85 | static int done=0; |
5d2231ee FB |
86 | |
87 | if (!done) { | |
88 | int i; | |
7458ccbb | 89 | VLC dv_vlc; |
5d2231ee FB |
90 | |
91 | done = 1; | |
92 | ||
93 | /* NOTE: as a trick, we use the fact the no codes are unused | |
94 | to accelerate the parsing of partial codes */ | |
95 | init_vlc(&dv_vlc, TEX_VLC_BITS, NB_DV_VLC, | |
96 | dv_vlc_len, 1, 1, dv_vlc_bits, 2, 2); | |
97 | ||
98 | dv_rl_vlc[0] = av_malloc(dv_vlc.table_size * sizeof(RL_VLC_ELEM)); | |
99 | for(i = 0; i < dv_vlc.table_size; i++){ | |
100 | int code= dv_vlc.table[i][0]; | |
101 | int len = dv_vlc.table[i][1]; | |
102 | int level, run; | |
103 | ||
104 | if(len<0){ //more bits needed | |
105 | run= 0; | |
106 | level= code; | |
107 | } else if (code == (NB_DV_VLC - 1)) { | |
108 | /* EOB */ | |
109 | run = 0; | |
110 | level = 256; | |
111 | } else { | |
112 | run= dv_vlc_run[code] + 1; | |
113 | level= dv_vlc_level[code]; | |
114 | } | |
115 | dv_rl_vlc[0][i].len = len; | |
116 | dv_rl_vlc[0][i].level = level; | |
117 | dv_rl_vlc[0][i].run = run; | |
118 | } | |
7458ccbb RS |
119 | |
120 | memset(dv_vlc_codes, 0xff, sizeof(dv_vlc_codes)); | |
121 | for (i = 0; i < NB_DV_VLC - 1; i++) { | |
122 | if (dv_vlc_run[i] < 15 && dv_vlc_level[i] < 23 && dv_vlc_len[i] < 15) | |
123 | dv_vlc_codes[dv_vlc_run[i]][dv_vlc_level[i]] = i; | |
124 | } | |
5d2231ee | 125 | } |
7be166e4 FB |
126 | |
127 | /* ugly way to get the idct & scantable */ | |
128 | /* XXX: fix it */ | |
129 | memset(&s2, 0, sizeof(MpegEncContext)); | |
7be166e4 | 130 | s2.avctx = avctx; |
b0368839 | 131 | dsputil_init(&s2.dsp, avctx); |
defdfc9a | 132 | if (DCT_common_init(&s2) < 0) |
7be166e4 FB |
133 | return -1; |
134 | ||
7458ccbb RS |
135 | s->get_pixels = s2.dsp.get_pixels; |
136 | s->fdct = s2.dsp.fdct; | |
137 | ||
b0368839 MN |
138 | s->idct_put[0] = s2.dsp.idct_put; |
139 | memcpy(s->idct_permutation, s2.dsp.idct_permutation, 64); | |
7be166e4 FB |
140 | memcpy(s->dv_zigzag[0], s2.intra_scantable.permutated, 64); |
141 | ||
142 | /* XXX: use MMX also for idct248 */ | |
143 | s->idct_put[1] = simple_idct248_put; | |
144 | memcpy(s->dv_zigzag[1], dv_248_zigzag, 64); | |
145 | ||
5d2231ee FB |
146 | /* XXX: do it only for constant case */ |
147 | dv_build_unquantize_tables(s); | |
7458ccbb | 148 | |
4fa1c4fa RS |
149 | /* FIXME: I really don't think this should be here */ |
150 | if (dv_codec_profile(avctx)) | |
151 | avctx->pix_fmt = dv_codec_profile(avctx)->pix_fmt; | |
2744ca9a | 152 | avctx->coded_frame = &s->picture; |
4fa1c4fa | 153 | |
5d2231ee FB |
154 | return 0; |
155 | } | |
156 | ||
7458ccbb | 157 | // #define VLC_DEBUG |
5d2231ee | 158 | |
7be166e4 | 159 | typedef struct BlockInfo { |
0c1a9eda ZK |
160 | const uint8_t *shift_table; |
161 | const uint8_t *scan_table; | |
162 | uint8_t pos; /* position in block */ | |
163 | uint8_t eob_reached; /* true if EOB has been reached */ | |
164 | uint8_t dct_mode; | |
165 | uint8_t partial_bit_count; | |
166 | uint16_t partial_bit_buffer; | |
7be166e4 FB |
167 | int shift_offset; |
168 | } BlockInfo; | |
5d2231ee FB |
169 | |
170 | /* block size in bits */ | |
0c1a9eda | 171 | static const uint16_t block_sizes[6] = { |
5d2231ee FB |
172 | 112, 112, 112, 112, 80, 80 |
173 | }; | |
174 | ||
175 | #ifndef ALT_BITSTREAM_READER | |
924311cd | 176 | #warning only works with ALT_BITSTREAM_READER |
5d2231ee FB |
177 | #endif |
178 | ||
179 | /* decode ac coefs */ | |
180 | static void dv_decode_ac(DVVideoDecodeContext *s, | |
0e15384d | 181 | BlockInfo *mb, DCTELEM *block, int last_index) |
5d2231ee FB |
182 | { |
183 | int last_re_index; | |
7be166e4 | 184 | int shift_offset = mb->shift_offset; |
0c1a9eda ZK |
185 | const uint8_t *scan_table = mb->scan_table; |
186 | const uint8_t *shift_table = mb->shift_table; | |
7be166e4 | 187 | int pos = mb->pos; |
5d2231ee FB |
188 | int level, pos1, sign, run; |
189 | int partial_bit_count; | |
924311cd MN |
190 | #ifndef ALT_BITSTREAM_READER //FIXME |
191 | int re_index=0; | |
192 | int re1_index=0; | |
193 | #endif | |
5d2231ee FB |
194 | OPEN_READER(re, &s->gb); |
195 | ||
196 | #ifdef VLC_DEBUG | |
7be166e4 | 197 | printf("start\n"); |
5d2231ee FB |
198 | #endif |
199 | ||
200 | /* if we must parse a partial vlc, we do it here */ | |
7be166e4 | 201 | partial_bit_count = mb->partial_bit_count; |
5d2231ee | 202 | if (partial_bit_count > 0) { |
0c1a9eda ZK |
203 | uint8_t buf[4]; |
204 | uint32_t v; | |
5d2231ee FB |
205 | int l, l1; |
206 | GetBitContext gb1; | |
207 | ||
208 | /* build the dummy bit buffer */ | |
209 | l = 16 - partial_bit_count; | |
210 | UPDATE_CACHE(re, &s->gb); | |
211 | #ifdef VLC_DEBUG | |
212 | printf("show=%04x\n", SHOW_UBITS(re, &s->gb, 16)); | |
213 | #endif | |
7be166e4 | 214 | v = (mb->partial_bit_buffer << l) | SHOW_UBITS(re, &s->gb, l); |
5d2231ee FB |
215 | buf[0] = v >> 8; |
216 | buf[1] = v; | |
217 | #ifdef VLC_DEBUG | |
218 | printf("v=%04x cnt=%d %04x\n", | |
7be166e4 | 219 | v, partial_bit_count, (mb->partial_bit_buffer << l)); |
5d2231ee FB |
220 | #endif |
221 | /* try to read the codeword */ | |
68f593b4 | 222 | init_get_bits(&gb1, buf, 4*8); |
5d2231ee FB |
223 | { |
224 | OPEN_READER(re1, &gb1); | |
225 | UPDATE_CACHE(re1, &gb1); | |
226 | GET_RL_VLC(level, run, re1, &gb1, dv_rl_vlc[0], | |
227 | TEX_VLC_BITS, 2); | |
228 | l = re1_index; | |
229 | CLOSE_READER(re1, &gb1); | |
230 | } | |
231 | #ifdef VLC_DEBUG | |
232 | printf("****run=%d level=%d size=%d\n", run, level, l); | |
233 | #endif | |
234 | /* compute codeword length */ | |
235 | l1 = (level != 256 && level != 0); | |
236 | /* if too long, we cannot parse */ | |
237 | l -= partial_bit_count; | |
238 | if ((re_index + l + l1) > last_index) | |
239 | return; | |
240 | /* skip read bits */ | |
241 | last_re_index = 0; /* avoid warning */ | |
242 | re_index += l; | |
7be166e4 | 243 | /* by definition, if we can read the vlc, all partial bits |
5d2231ee | 244 | will be read (otherwise we could have read the vlc before) */ |
7be166e4 | 245 | mb->partial_bit_count = 0; |
5d2231ee FB |
246 | UPDATE_CACHE(re, &s->gb); |
247 | goto handle_vlc; | |
248 | } | |
249 | ||
250 | /* get the AC coefficients until last_index is reached */ | |
251 | for(;;) { | |
252 | UPDATE_CACHE(re, &s->gb); | |
253 | #ifdef VLC_DEBUG | |
254 | printf("%2d: bits=%04x index=%d\n", | |
255 | pos, SHOW_UBITS(re, &s->gb, 16), re_index); | |
256 | #endif | |
257 | last_re_index = re_index; | |
258 | GET_RL_VLC(level, run, re, &s->gb, dv_rl_vlc[0], | |
259 | TEX_VLC_BITS, 2); | |
260 | handle_vlc: | |
261 | #ifdef VLC_DEBUG | |
262 | printf("run=%d level=%d\n", run, level); | |
263 | #endif | |
264 | if (level == 256) { | |
265 | if (re_index > last_index) { | |
266 | cannot_read: | |
267 | /* put position before read code */ | |
268 | re_index = last_re_index; | |
7be166e4 | 269 | mb->eob_reached = 0; |
5d2231ee FB |
270 | break; |
271 | } | |
272 | /* EOB */ | |
7be166e4 | 273 | mb->eob_reached = 1; |
5d2231ee FB |
274 | break; |
275 | } else if (level != 0) { | |
276 | if ((re_index + 1) > last_index) | |
277 | goto cannot_read; | |
278 | sign = SHOW_SBITS(re, &s->gb, 1); | |
279 | level = (level ^ sign) - sign; | |
280 | LAST_SKIP_BITS(re, &s->gb, 1); | |
281 | pos += run; | |
282 | /* error */ | |
283 | if (pos >= 64) { | |
284 | goto read_error; | |
285 | } | |
286 | pos1 = scan_table[pos]; | |
7be166e4 | 287 | level = level << (shift_table[pos1] + shift_offset); |
5d2231ee FB |
288 | block[pos1] = level; |
289 | // printf("run=%d level=%d shift=%d\n", run, level, shift_table[pos1]); | |
290 | } else { | |
291 | if (re_index > last_index) | |
292 | goto cannot_read; | |
293 | /* level is zero: means run without coding. No | |
294 | sign is coded */ | |
295 | pos += run; | |
296 | /* error */ | |
297 | if (pos >= 64) { | |
298 | read_error: | |
299 | #if defined(VLC_DEBUG) || 1 | |
ed543377 | 300 | fprintf(stderr, "error pos=%d\n", pos); |
5d2231ee FB |
301 | #endif |
302 | /* for errors, we consider the eob is reached */ | |
7be166e4 | 303 | mb->eob_reached = 1; |
5d2231ee FB |
304 | break; |
305 | } | |
306 | } | |
307 | } | |
308 | CLOSE_READER(re, &s->gb); | |
7be166e4 | 309 | mb->pos = pos; |
5d2231ee FB |
310 | } |
311 | ||
312 | static inline void bit_copy(PutBitContext *pb, GetBitContext *gb, int bits_left) | |
313 | { | |
314 | while (bits_left >= 16) { | |
315 | put_bits(pb, 16, get_bits(gb, 16)); | |
316 | bits_left -= 16; | |
317 | } | |
318 | if (bits_left > 0) { | |
319 | put_bits(pb, bits_left, get_bits(gb, bits_left)); | |
320 | } | |
321 | } | |
322 | ||
323 | /* mb_x and mb_y are in units of 8 pixels */ | |
324 | static inline void dv_decode_video_segment(DVVideoDecodeContext *s, | |
0c1a9eda ZK |
325 | uint8_t *buf_ptr1, |
326 | const uint16_t *mb_pos_ptr) | |
5d2231ee FB |
327 | { |
328 | int quant, dc, dct_mode, class1, j; | |
329 | int mb_index, mb_x, mb_y, v, last_index; | |
330 | DCTELEM *block, *block1; | |
331 | int c_offset, bits_left; | |
0c1a9eda | 332 | uint8_t *y_ptr; |
7be166e4 | 333 | BlockInfo mb_data[5 * 6], *mb, *mb1; |
0c1a9eda ZK |
334 | void (*idct_put)(uint8_t *dest, int line_size, DCTELEM *block); |
335 | uint8_t *buf_ptr; | |
5d2231ee | 336 | PutBitContext pb, vs_pb; |
0c1a9eda | 337 | uint8_t mb_bit_buffer[80 + 4]; /* allow some slack */ |
7be166e4 | 338 | int mb_bit_count; |
0c1a9eda | 339 | uint8_t vs_bit_buffer[5 * 80 + 4]; /* allow some slack */ |
5d2231ee FB |
340 | int vs_bit_count; |
341 | ||
342 | memset(s->block, 0, sizeof(s->block)); | |
343 | ||
344 | /* pass 1 : read DC and AC coefficients in blocks */ | |
345 | buf_ptr = buf_ptr1; | |
346 | block1 = &s->block[0][0]; | |
7be166e4 | 347 | mb1 = mb_data; |
ed7debda | 348 | init_put_bits(&vs_pb, vs_bit_buffer, 5 * 80); |
5d2231ee FB |
349 | vs_bit_count = 0; |
350 | for(mb_index = 0; mb_index < 5; mb_index++) { | |
351 | /* skip header */ | |
352 | quant = buf_ptr[3] & 0x0f; | |
353 | buf_ptr += 4; | |
ed7debda | 354 | init_put_bits(&pb, mb_bit_buffer, 80); |
7be166e4 FB |
355 | mb_bit_count = 0; |
356 | mb = mb1; | |
5d2231ee FB |
357 | block = block1; |
358 | for(j = 0;j < 6; j++) { | |
359 | /* NOTE: size is not important here */ | |
68f593b4 | 360 | init_get_bits(&s->gb, buf_ptr, 14*8); |
5d2231ee FB |
361 | |
362 | /* get the dc */ | |
363 | dc = get_bits(&s->gb, 9); | |
364 | dc = (dc << (32 - 9)) >> (32 - 9); | |
365 | dct_mode = get_bits1(&s->gb); | |
7be166e4 FB |
366 | mb->dct_mode = dct_mode; |
367 | mb->scan_table = s->dv_zigzag[dct_mode]; | |
5d2231ee | 368 | class1 = get_bits(&s->gb, 2); |
7be166e4 FB |
369 | mb->shift_offset = (class1 == 3); |
370 | mb->shift_table = s->dv_shift[dct_mode] | |
5d2231ee FB |
371 | [quant + dv_quant_offset[class1]]; |
372 | dc = dc << 2; | |
373 | /* convert to unsigned because 128 is not added in the | |
374 | standard IDCT */ | |
375 | dc += 1024; | |
376 | block[0] = dc; | |
377 | last_index = block_sizes[j]; | |
378 | buf_ptr += last_index >> 3; | |
7be166e4 FB |
379 | mb->pos = 0; |
380 | mb->partial_bit_count = 0; | |
5d2231ee | 381 | |
4fa1c4fa RS |
382 | #ifdef VLC_DEBUG |
383 | printf("MB block: %d, %d ", mb_index, j); | |
384 | #endif | |
7be166e4 | 385 | dv_decode_ac(s, mb, block, last_index); |
5d2231ee FB |
386 | |
387 | /* write the remaining bits in a new buffer only if the | |
388 | block is finished */ | |
924311cd | 389 | bits_left = last_index - get_bits_count(&s->gb); |
7be166e4 FB |
390 | if (mb->eob_reached) { |
391 | mb->partial_bit_count = 0; | |
392 | mb_bit_count += bits_left; | |
5d2231ee FB |
393 | bit_copy(&pb, &s->gb, bits_left); |
394 | } else { | |
395 | /* should be < 16 bits otherwise a codeword could have | |
396 | been parsed */ | |
7be166e4 FB |
397 | mb->partial_bit_count = bits_left; |
398 | mb->partial_bit_buffer = get_bits(&s->gb, bits_left); | |
5d2231ee FB |
399 | } |
400 | block += 64; | |
7be166e4 | 401 | mb++; |
5d2231ee FB |
402 | } |
403 | ||
404 | flush_put_bits(&pb); | |
405 | ||
406 | /* pass 2 : we can do it just after */ | |
407 | #ifdef VLC_DEBUG | |
4fa1c4fa | 408 | printf("***pass 2 size=%d MB#=%d\n", mb_bit_count, mb_index); |
5d2231ee FB |
409 | #endif |
410 | block = block1; | |
7be166e4 | 411 | mb = mb1; |
68f593b4 | 412 | init_get_bits(&s->gb, mb_bit_buffer, 80*8); |
5d2231ee | 413 | for(j = 0;j < 6; j++) { |
924311cd | 414 | if (!mb->eob_reached && get_bits_count(&s->gb) < mb_bit_count) { |
7be166e4 | 415 | dv_decode_ac(s, mb, block, mb_bit_count); |
5d2231ee | 416 | /* if still not finished, no need to parse other blocks */ |
7be166e4 | 417 | if (!mb->eob_reached) { |
5d2231ee FB |
418 | /* we could not parse the current AC coefficient, |
419 | so we add the remaining bytes */ | |
924311cd | 420 | bits_left = mb_bit_count - get_bits_count(&s->gb); |
5d2231ee | 421 | if (bits_left > 0) { |
7be166e4 FB |
422 | mb->partial_bit_count += bits_left; |
423 | mb->partial_bit_buffer = | |
424 | (mb->partial_bit_buffer << bits_left) | | |
5d2231ee FB |
425 | get_bits(&s->gb, bits_left); |
426 | } | |
427 | goto next_mb; | |
428 | } | |
429 | } | |
430 | block += 64; | |
7be166e4 | 431 | mb++; |
5d2231ee FB |
432 | } |
433 | /* all blocks are finished, so the extra bytes can be used at | |
434 | the video segment level */ | |
924311cd | 435 | bits_left = mb_bit_count - get_bits_count(&s->gb); |
5d2231ee FB |
436 | vs_bit_count += bits_left; |
437 | bit_copy(&vs_pb, &s->gb, bits_left); | |
438 | next_mb: | |
7be166e4 | 439 | mb1 += 6; |
5d2231ee FB |
440 | block1 += 6 * 64; |
441 | } | |
442 | ||
443 | /* we need a pass other the whole video segment */ | |
444 | flush_put_bits(&vs_pb); | |
445 | ||
446 | #ifdef VLC_DEBUG | |
447 | printf("***pass 3 size=%d\n", vs_bit_count); | |
448 | #endif | |
449 | block = &s->block[0][0]; | |
450 | mb = mb_data; | |
68f593b4 | 451 | init_get_bits(&s->gb, vs_bit_buffer, 5 * 80*8); |
5d2231ee FB |
452 | for(mb_index = 0; mb_index < 5; mb_index++) { |
453 | for(j = 0;j < 6; j++) { | |
7be166e4 | 454 | if (!mb->eob_reached) { |
5d2231ee FB |
455 | #ifdef VLC_DEBUG |
456 | printf("start %d:%d\n", mb_index, j); | |
457 | #endif | |
7be166e4 | 458 | dv_decode_ac(s, mb, block, vs_bit_count); |
5d2231ee FB |
459 | } |
460 | block += 64; | |
7be166e4 | 461 | mb++; |
5d2231ee | 462 | } |
5d2231ee FB |
463 | } |
464 | ||
465 | /* compute idct and place blocks */ | |
466 | block = &s->block[0][0]; | |
467 | mb = mb_data; | |
468 | for(mb_index = 0; mb_index < 5; mb_index++) { | |
469 | v = *mb_pos_ptr++; | |
470 | mb_x = v & 0xff; | |
471 | mb_y = v >> 8; | |
7458ccbb RS |
472 | y_ptr = s->picture.data[0] + (mb_y * s->picture.linesize[0] * 8) + (mb_x * 8); |
473 | if (s->sys->pix_fmt == PIX_FMT_YUV411P) | |
474 | c_offset = (mb_y * s->picture.linesize[1] * 8) + ((mb_x >> 2) * 8); | |
5d2231ee | 475 | else |
7458ccbb | 476 | c_offset = ((mb_y >> 1) * s->picture.linesize[1] * 8) + ((mb_x >> 1) * 8); |
5d2231ee | 477 | for(j = 0;j < 6; j++) { |
7be166e4 | 478 | idct_put = s->idct_put[mb->dct_mode]; |
5d2231ee | 479 | if (j < 4) { |
7458ccbb | 480 | if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x < (704 / 8)) { |
1c05e11d | 481 | /* NOTE: at end of line, the macroblock is handled as 420 */ |
7458ccbb | 482 | idct_put(y_ptr + (j * 8), s->picture.linesize[0], block); |
5d2231ee | 483 | } else { |
7458ccbb RS |
484 | idct_put(y_ptr + ((j & 1) * 8) + ((j >> 1) * 8 * s->picture.linesize[0]), |
485 | s->picture.linesize[0], block); | |
5d2231ee FB |
486 | } |
487 | } else { | |
7458ccbb | 488 | if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) { |
00c28046 | 489 | uint64_t aligned_pixels[64/8]; |
f539eb52 | 490 | uint8_t *pixels= (uint8_t*)aligned_pixels; |
00c28046 | 491 | uint8_t *c_ptr, *c_ptr1, *ptr; |
1c05e11d FB |
492 | int y, linesize; |
493 | /* NOTE: at end of line, the macroblock is handled as 420 */ | |
494 | idct_put(pixels, 8, block); | |
7458ccbb RS |
495 | linesize = s->picture.linesize[6 - j]; |
496 | c_ptr = s->picture.data[6 - j] + c_offset; | |
1c05e11d FB |
497 | ptr = pixels; |
498 | for(y = 0;y < 8; y++) { | |
499 | /* convert to 411P */ | |
62cf114b MN |
500 | c_ptr1 = c_ptr + 8*linesize; |
501 | c_ptr[0]= ptr[0]; c_ptr1[0]= ptr[4]; | |
502 | c_ptr[1]= ptr[1]; c_ptr1[1]= ptr[5]; | |
503 | c_ptr[2]= ptr[2]; c_ptr1[2]= ptr[6]; | |
504 | c_ptr[3]= ptr[3]; c_ptr1[3]= ptr[7]; | |
505 | c_ptr += linesize; | |
1c05e11d FB |
506 | ptr += 8; |
507 | } | |
508 | } else { | |
509 | /* don't ask me why they inverted Cb and Cr ! */ | |
7458ccbb RS |
510 | idct_put(s->picture.data[6 - j] + c_offset, |
511 | s->picture.linesize[6 - j], block); | |
1c05e11d | 512 | } |
5d2231ee FB |
513 | } |
514 | block += 64; | |
7be166e4 | 515 | mb++; |
5d2231ee | 516 | } |
5d2231ee FB |
517 | } |
518 | } | |
519 | ||
4fa1c4fa RS |
520 | /* Converts run and level (where level != 0) pair into vlc, returning bit size */ |
521 | static inline int dv_rl2vlc(int run, int l, uint32_t* vlc) | |
522 | { | |
523 | int sign = l >> 8; | |
524 | int level = (l ^ sign) - sign; | |
525 | int size; | |
526 | ||
527 | sign = (sign & 1); | |
528 | ||
529 | if (run < 15 && level < 23 && dv_vlc_codes[run][level] != -1) { | |
530 | *vlc = (dv_vlc_bits[dv_vlc_codes[run][level]] << 1) | sign; | |
531 | size = dv_vlc_len[dv_vlc_codes[run][level]] + 1; | |
532 | } | |
533 | else { | |
534 | if (level < 23) { | |
535 | *vlc = (dv_vlc_bits[dv_vlc_codes[0][level]] << 1) | sign; | |
536 | size = dv_vlc_len[dv_vlc_codes[0][level]] + 1; | |
537 | } else { | |
538 | *vlc = 0xfe00 | (level << 1) | sign; | |
539 | size = 16; | |
540 | } | |
541 | ||
542 | switch(run) { | |
543 | case 0: | |
544 | break; | |
545 | case 1: | |
546 | case 2: | |
547 | *vlc |= ((0x7ce | (run - 1)) << size); | |
548 | size += 11; | |
549 | break; | |
550 | case 3: | |
551 | case 4: | |
552 | case 5: | |
553 | case 6: | |
554 | *vlc |= ((0xfac | (run - 3)) << size); | |
555 | size += 12; | |
556 | break; | |
557 | default: | |
558 | *vlc |= ((0x1f80 | (run - 1)) << size); | |
559 | size += 13; | |
560 | break; | |
561 | } | |
562 | } | |
563 | ||
564 | return size; | |
565 | } | |
566 | ||
567 | typedef struct EncBlockInfo { | |
568 | int qno; | |
569 | int cno; | |
570 | int dct_mode; | |
571 | int block_size; | |
572 | DCTELEM *mb; | |
573 | PutBitContext pb; | |
574 | } EncBlockInfo; | |
575 | ||
576 | static inline int dv_bits_left(EncBlockInfo* bi) | |
577 | { | |
578 | return (bi->block_size - get_bit_count(&bi->pb)); | |
579 | } | |
580 | ||
581 | static inline void dv_encode_ac(EncBlockInfo* bi, PutBitContext* heap) | |
582 | { | |
583 | int i, level, size, run = 0; | |
584 | uint32_t vlc; | |
585 | PutBitContext* cpb = &bi->pb; | |
586 | ||
587 | for (i=1; i<64; i++) { | |
588 | level = bi->mb[ff_zigzag_direct[i]] / | |
589 | (1<<(dv_quant_shifts[bi->qno + dv_quant_offset[bi->cno]] | |
590 | [dv_88_areas[ff_zigzag_direct[i]]] + 4 + (bi->cno == 3))); | |
591 | if (level != 0) { | |
592 | size = dv_rl2vlc(run, level, &vlc); | |
593 | put_vlc: | |
594 | ||
595 | #ifdef VLC_DEBUG | |
596 | printf(" %3d:%3d", run, level); | |
597 | #endif | |
598 | if (cpb == &bi->pb && size > dv_bits_left(bi)) { | |
599 | size -= dv_bits_left(bi); | |
600 | put_bits(cpb, dv_bits_left(bi), vlc >> size); | |
601 | vlc = vlc & ((1<<size)-1); | |
602 | cpb = heap; | |
603 | } | |
604 | put_bits(cpb, size, vlc); | |
605 | run = 0; | |
606 | } else | |
607 | run++; | |
608 | } | |
609 | ||
610 | if (i == 64) { | |
611 | size = 4; vlc = 6; /* End Of Block stamp */ | |
612 | goto put_vlc; | |
613 | } | |
614 | } | |
615 | ||
616 | static inline void dv_redistr_bits(EncBlockInfo* bi, int count, uint8_t* extra_data, int extra_bits, PutBitContext* heap) | |
617 | { | |
618 | int i; | |
619 | GetBitContext gb; | |
620 | ||
621 | init_get_bits(&gb, extra_data, extra_bits); | |
622 | ||
623 | for (i=0; i<count; i++) { | |
624 | int bits_left = dv_bits_left(bi); | |
625 | #ifdef VLC_DEBUG | |
626 | if (bits_left) | |
627 | printf("------------> inserting %d bytes in %d:%d\n", bits_left, i/6, i%6); | |
628 | #endif | |
629 | if (bits_left > extra_bits) { | |
630 | bit_copy(&bi->pb, &gb, extra_bits); | |
631 | extra_bits = 0; | |
632 | break; | |
633 | } else | |
634 | bit_copy(&bi->pb, &gb, bits_left); | |
635 | ||
636 | extra_bits -= bits_left; | |
637 | bi++; | |
638 | } | |
639 | ||
640 | if (extra_bits > 0 && heap) | |
641 | bit_copy(heap, &gb, extra_bits); | |
642 | } | |
643 | ||
644 | static inline void dv_set_class_number(EncBlockInfo* bi, int j) | |
645 | { | |
646 | int i, max_ac = 0; | |
647 | ||
648 | for (i=1; i<64; i++) { | |
649 | int ac = abs(bi->mb[ff_zigzag_direct[i]]) / 4; | |
650 | if (max_ac < ac) | |
651 | max_ac = ac; | |
652 | } | |
653 | if (max_ac < 12) | |
654 | bi->cno = j; | |
655 | else if (max_ac < 24) | |
656 | bi->cno = j + 1; | |
657 | else if (max_ac < 36) | |
658 | bi->cno = j + 2; | |
659 | else | |
660 | bi->cno = j + 3; | |
661 | ||
662 | if (bi->cno > 3) | |
663 | bi->cno = 3; | |
664 | } | |
665 | ||
666 | /* | |
667 | * This is a very rough initial implementaion. The performance is | |
668 | * horrible and some features are missing, mainly 2-4-8 DCT encoding. | |
669 | * The weighting is missing as well, but it's missing from the decoding | |
670 | * step also -- so at least we're on the same page with decoder ;-) | |
671 | */ | |
672 | static inline void dv_encode_video_segment(DVVideoDecodeContext *s, | |
673 | uint8_t *dif, | |
674 | const uint16_t *mb_pos_ptr) | |
675 | { | |
676 | int mb_index, i, j, v; | |
677 | int mb_x, mb_y, c_offset, linesize; | |
678 | uint8_t* y_ptr; | |
679 | uint8_t* data; | |
680 | int do_edge_wrap; | |
681 | DCTELEM *block; | |
682 | EncBlockInfo enc_blks[5*6]; | |
683 | EncBlockInfo* enc_blk; | |
684 | int free_vs_bits; | |
685 | int extra_bits; | |
686 | PutBitContext extra_vs; | |
687 | uint8_t extra_vs_data[5*6*128]; | |
688 | uint8_t extra_mb_data[6*128]; | |
689 | ||
690 | int QNO = 15; | |
691 | ||
692 | /* Stage 1 -- doing DCT on 5 MBs */ | |
693 | block = &s->block[0][0]; | |
694 | for(mb_index = 0; mb_index < 5; mb_index++) { | |
695 | v = *mb_pos_ptr++; | |
696 | mb_x = v & 0xff; | |
697 | mb_y = v >> 8; | |
698 | y_ptr = s->picture.data[0] + (mb_y * s->picture.linesize[0] * 8) + (mb_x * 8); | |
699 | c_offset = (s->sys->pix_fmt == PIX_FMT_YUV411P) ? | |
700 | ((mb_y * s->picture.linesize[1] * 8) + ((mb_x >> 2) * 8)) : | |
701 | (((mb_y >> 1) * s->picture.linesize[1] * 8) + ((mb_x >> 1) * 8)); | |
702 | do_edge_wrap = 0; | |
703 | for(j = 0;j < 6; j++) { | |
704 | if (j < 4) { /* Four Y blocks */ | |
705 | /* NOTE: at end of line, the macroblock is handled as 420 */ | |
706 | if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x < (704 / 8)) { | |
707 | data = y_ptr + (j * 8); | |
708 | } else { | |
709 | data = y_ptr + ((j & 1) * 8) + ((j >> 1) * 8 * s->picture.linesize[0]); | |
710 | } | |
711 | linesize = s->picture.linesize[0]; | |
712 | } else { /* Cr and Cb blocks */ | |
713 | /* don't ask Fabrice why they inverted Cb and Cr ! */ | |
714 | data = s->picture.data[6 - j] + c_offset; | |
715 | linesize = s->picture.linesize[6 - j]; | |
716 | if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) | |
717 | do_edge_wrap = 1; | |
718 | } | |
719 | ||
720 | /* Everything is set up -- now just copy data -> DCT block */ | |
721 | if (do_edge_wrap) { /* Edge wrap copy: 4x16 -> 8x8 */ | |
722 | uint8_t* d; | |
723 | DCTELEM *b = block; | |
724 | for (i=0;i<8;i++) { | |
725 | d = data + 8 * linesize; | |
726 | b[0] = data[0]; b[1] = data[1]; b[2] = data[2]; b[3] = data[3]; | |
727 | b[4] = d[0]; b[5] = d[1]; b[6] = d[2]; b[7] = d[3]; | |
728 | data += linesize; | |
729 | b += 8; | |
730 | } | |
731 | } else { /* Simple copy: 8x8 -> 8x8 */ | |
732 | s->get_pixels(block, data, linesize); | |
733 | } | |
734 | ||
735 | s->fdct(block); | |
736 | ||
737 | block += 64; | |
738 | } | |
739 | } | |
740 | ||
741 | /* Stage 2 -- setup for encoding phase */ | |
742 | enc_blk = &enc_blks[0]; | |
743 | block = &s->block[0][0]; | |
744 | for (i=0; i<5; i++) { | |
745 | for (j=0; j<6; j++) { | |
746 | enc_blk->mb = block; | |
747 | enc_blk->dct_mode = 0; | |
748 | enc_blk->block_size = block_sizes[j]; | |
749 | ||
750 | dv_set_class_number(enc_blk, j/4*(j%2)); | |
751 | ||
752 | block += 64; | |
753 | enc_blk++; | |
754 | } | |
755 | } | |
756 | ||
757 | /* Stage 3 -- encoding by trial-and-error */ | |
758 | encode_vs: | |
759 | enc_blk = &enc_blks[0]; | |
760 | for (i=0; i<5; i++) { | |
761 | uint8_t* p = dif + i*80 + 4; | |
762 | for (j=0; j<6; j++) { | |
763 | enc_blk->qno = QNO; | |
ed7debda | 764 | init_put_bits(&enc_blk->pb, p, block_sizes[j]/8); |
4fa1c4fa RS |
765 | enc_blk++; |
766 | p += block_sizes[j]/8; | |
767 | } | |
768 | } | |
769 | ||
ed7debda | 770 | init_put_bits(&extra_vs, extra_vs_data, sizeof(extra_vs_data)); |
4fa1c4fa RS |
771 | free_vs_bits = 0; |
772 | enc_blk = &enc_blks[0]; | |
773 | for (i=0; i<5; i++) { | |
774 | PutBitContext extra_mb; | |
775 | EncBlockInfo* enc_blk2 = enc_blk; | |
776 | int free_mb_bits = 0; | |
777 | ||
ed7debda | 778 | init_put_bits(&extra_mb, extra_mb_data, sizeof(extra_mb_data)); |
4fa1c4fa RS |
779 | dif[i*80 + 3] = enc_blk->qno; |
780 | ||
781 | for (j=0; j<6; j++) { | |
782 | uint16_t dc = ((enc_blk->mb[0] >> 3) - 1024) >> 2; | |
783 | ||
784 | put_bits(&enc_blk->pb, 9, dc); | |
785 | put_bits(&enc_blk->pb, 1, enc_blk->dct_mode); | |
786 | put_bits(&enc_blk->pb, 2, enc_blk->cno); | |
787 | ||
788 | #ifdef VLC_DEBUG | |
789 | printf("[%d, %d]: ", i, j); | |
790 | #endif | |
791 | dv_encode_ac(enc_blk, &extra_mb); | |
792 | #ifdef VLC_DEBUG | |
793 | printf("\n"); | |
794 | #endif | |
795 | ||
796 | free_mb_bits += dv_bits_left(enc_blk); | |
797 | enc_blk++; | |
798 | } | |
799 | ||
800 | /* We can't flush extra_mb just yet -- since it'll round up bit number */ | |
801 | extra_bits = get_bit_count(&extra_mb); | |
802 | if (free_mb_bits > extra_bits) | |
803 | free_vs_bits += free_mb_bits - extra_bits; | |
804 | ||
805 | if (extra_bits) { /* FIXME: speed up things when free_mb_bits == 0 */ | |
806 | flush_put_bits(&extra_mb); | |
807 | dv_redistr_bits(enc_blk2, 6, extra_mb_data, extra_bits, &extra_vs); | |
808 | } | |
809 | } | |
810 | ||
811 | /* We can't flush extra_mb just yet -- since it'll round up bit number */ | |
812 | extra_bits = get_bit_count(&extra_vs); | |
813 | if (extra_bits > free_vs_bits && QNO) { /* FIXME: very crude trial-and-error */ | |
814 | QNO--; | |
815 | goto encode_vs; | |
816 | } | |
817 | ||
818 | if (extra_bits) { | |
819 | flush_put_bits(&extra_vs); | |
820 | dv_redistr_bits(&enc_blks[0], 5*6, extra_vs_data, extra_bits, NULL); | |
821 | } | |
822 | ||
823 | for (i=0; i<6*5; i++) { | |
824 | flush_put_bits(&enc_blks[i].pb); | |
825 | #ifdef VLC_DEBUG | |
826 | printf("[%d:%d] qno=%d cno=%d\n", i/6, i%6, enc_blks[i].qno, enc_blks[i].cno); | |
827 | #endif | |
828 | } | |
829 | } | |
830 | ||
5d2231ee FB |
831 | /* NOTE: exactly one frame must be given (120000 bytes for NTSC, |
832 | 144000 bytes for PAL) */ | |
833 | static int dvvideo_decode_frame(AVCodecContext *avctx, | |
834 | void *data, int *data_size, | |
0c1a9eda | 835 | uint8_t *buf, int buf_size) |
5d2231ee FB |
836 | { |
837 | DVVideoDecodeContext *s = avctx->priv_data; | |
7458ccbb | 838 | int ds, vs; |
0c1a9eda | 839 | const uint16_t *mb_pos_ptr; |
5d2231ee | 840 | |
7458ccbb RS |
841 | s->sys = dv_frame_profile(buf); |
842 | if (!s->sys || buf_size < s->sys->frame_size) | |
843 | return -1; /* NOTE: we only accept several full frames */ | |
e9feea59 | 844 | |
7458ccbb | 845 | |
e20c4069 MN |
846 | if(s->picture.data[0]) |
847 | avctx->release_buffer(avctx, &s->picture); | |
848 | ||
7458ccbb RS |
849 | s->picture.reference = 0; |
850 | avctx->pix_fmt = s->sys->pix_fmt; | |
86a7e115 RS |
851 | avctx->width = s->sys->width; |
852 | avctx->height = s->sys->height; | |
1e491e29 MN |
853 | if(avctx->get_buffer(avctx, &s->picture) < 0) { |
854 | fprintf(stderr, "get_buffer() failed\n"); | |
855 | return -1; | |
b0397e0e | 856 | } |
2744ca9a RS |
857 | s->picture.interlaced_frame = 1; |
858 | s->picture.bottom_field_first = 1; | |
b0397e0e | 859 | |
5d2231ee | 860 | /* for each DIF segment */ |
7458ccbb RS |
861 | mb_pos_ptr = s->sys->video_place; |
862 | for (ds = 0; ds < s->sys->difseg_size; ds++) { | |
863 | buf += 6 * 80; /* skip DIF segment header */ | |
5d2231ee FB |
864 | |
865 | for(vs = 0; vs < 27; vs++) { | |
7458ccbb RS |
866 | if ((vs % 3) == 0) |
867 | buf += 80; /* skip audio block */ | |
868 | ||
4fa1c4fa RS |
869 | #ifdef VLC_DEBUG |
870 | printf("********************* %d, %d **********************\n", ds, vs); | |
871 | #endif | |
7458ccbb RS |
872 | dv_decode_video_segment(s, buf, mb_pos_ptr); |
873 | buf += 5 * 80; | |
5d2231ee FB |
874 | mb_pos_ptr += 5; |
875 | } | |
876 | } | |
877 | ||
9e398782 A |
878 | emms_c(); |
879 | ||
5d2231ee | 880 | /* return image */ |
492cd3a9 MN |
881 | *data_size = sizeof(AVFrame); |
882 | *(AVFrame*)data= s->picture; | |
1e491e29 | 883 | |
7458ccbb | 884 | return s->sys->frame_size; |
5d2231ee FB |
885 | } |
886 | ||
4fa1c4fa RS |
887 | static int dvvideo_encode_frame(AVCodecContext *c, uint8_t *buf, int buf_size, |
888 | void *data) | |
5d2231ee | 889 | { |
4fa1c4fa RS |
890 | DVVideoDecodeContext *s = c->priv_data; |
891 | const uint16_t *mb_pos_ptr; | |
892 | int ds, vs; | |
893 | ||
894 | s->sys = dv_codec_profile(c); | |
895 | if (!s->sys) | |
896 | return -1; | |
897 | ||
898 | c->pix_fmt = s->sys->pix_fmt; | |
899 | s->picture = *((AVFrame *)data); | |
900 | ||
901 | /* for each DIF segment */ | |
902 | mb_pos_ptr = s->sys->video_place; | |
903 | for (ds = 0; ds < s->sys->difseg_size; ds++) { | |
904 | buf += 6 * 80; /* skip DIF segment header */ | |
905 | ||
906 | for(vs = 0; vs < 27; vs++) { | |
907 | if ((vs % 3) == 0) | |
908 | buf += 80; /* skip audio block */ | |
909 | ||
910 | #ifdef VLC_DEBUG | |
911 | printf("********************* %d, %d **********************\n", ds, vs); | |
912 | #endif | |
913 | dv_encode_video_segment(s, buf, mb_pos_ptr); | |
914 | buf += 5 * 80; | |
915 | mb_pos_ptr += 5; | |
916 | } | |
917 | } | |
5d2231ee | 918 | |
4fa1c4fa RS |
919 | emms_c(); |
920 | return s->sys->frame_size; | |
921 | } | |
922 | ||
923 | static int dvvideo_end(AVCodecContext *avctx) | |
924 | { | |
925 | avcodec_default_free_buffers(avctx); | |
5d2231ee FB |
926 | return 0; |
927 | } | |
928 | ||
929 | AVCodec dvvideo_decoder = { | |
930 | "dvvideo", | |
931 | CODEC_TYPE_VIDEO, | |
932 | CODEC_ID_DVVIDEO, | |
933 | sizeof(DVVideoDecodeContext), | |
4fa1c4fa RS |
934 | dvvideo_init, |
935 | dvvideo_encode_frame, | |
936 | dvvideo_end, | |
5d2231ee | 937 | dvvideo_decode_frame, |
b0397e0e | 938 | CODEC_CAP_DR1, |
5d2231ee FB |
939 | NULL |
940 | }; |