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1 | /* |
2 | * MPEG4 encoder. | |
3 | * Copyright (c) 2000,2001 Fabrice Bellard | |
4 | * Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at> | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
8 | * FFmpeg is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
12 | * | |
13 | * FFmpeg is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with FFmpeg; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | #include "libavutil/attributes.h" | |
24 | #include "libavutil/log.h" | |
25 | #include "libavutil/opt.h" | |
26 | #include "mpegutils.h" | |
27 | #include "mpegvideo.h" | |
28 | #include "h263.h" | |
29 | #include "mpeg4video.h" | |
30 | ||
31 | /* The uni_DCtab_* tables below contain unified bits+length tables to encode DC | |
32 | * differences in mpeg4. Unified in the sense that the specification specifies | |
33 | * this encoding in several steps. */ | |
34 | static uint8_t uni_DCtab_lum_len[512]; | |
35 | static uint8_t uni_DCtab_chrom_len[512]; | |
36 | static uint16_t uni_DCtab_lum_bits[512]; | |
37 | static uint16_t uni_DCtab_chrom_bits[512]; | |
38 | ||
39 | /* Unified encoding tables for run length encoding of coefficients. | |
40 | * Unified in the sense that the specification specifies the encoding in several steps. */ | |
41 | static uint32_t uni_mpeg4_intra_rl_bits[64 * 64 * 2 * 2]; | |
42 | static uint8_t uni_mpeg4_intra_rl_len[64 * 64 * 2 * 2]; | |
43 | static uint32_t uni_mpeg4_inter_rl_bits[64 * 64 * 2 * 2]; | |
44 | static uint8_t uni_mpeg4_inter_rl_len[64 * 64 * 2 * 2]; | |
45 | ||
46 | //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 + (run) * 256 + (level)) | |
47 | //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) + (level) * 64) | |
48 | #define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) * 128 + (level)) | |
49 | ||
50 | /* mpeg4 | |
51 | * inter | |
52 | * max level: 24/6 | |
53 | * max run: 53/63 | |
54 | * | |
55 | * intra | |
56 | * max level: 53/16 | |
57 | * max run: 29/41 | |
58 | */ | |
59 | ||
60 | /** | |
61 | * Return the number of bits that encoding the 8x8 block in block would need. | |
62 | * @param[in] block_last_index last index in scantable order that refers to a non zero element in block. | |
63 | */ | |
64 | static inline int get_block_rate(MpegEncContext *s, int16_t block[64], | |
65 | int block_last_index, uint8_t scantable[64]) | |
66 | { | |
67 | int last = 0; | |
68 | int j; | |
69 | int rate = 0; | |
70 | ||
71 | for (j = 1; j <= block_last_index; j++) { | |
72 | const int index = scantable[j]; | |
73 | int level = block[index]; | |
74 | if (level) { | |
75 | level += 64; | |
76 | if ((level & (~127)) == 0) { | |
77 | if (j < block_last_index) | |
78 | rate += s->intra_ac_vlc_length[UNI_AC_ENC_INDEX(j - last - 1, level)]; | |
79 | else | |
80 | rate += s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j - last - 1, level)]; | |
81 | } else | |
82 | rate += s->ac_esc_length; | |
83 | ||
84 | last = j; | |
85 | } | |
86 | } | |
87 | ||
88 | return rate; | |
89 | } | |
90 | ||
91 | /** | |
92 | * Restore the ac coefficients in block that have been changed by decide_ac_pred(). | |
93 | * This function also restores s->block_last_index. | |
94 | * @param[in,out] block MB coefficients, these will be restored | |
95 | * @param[in] dir ac prediction direction for each 8x8 block | |
96 | * @param[out] st scantable for each 8x8 block | |
97 | * @param[in] zigzag_last_index index referring to the last non zero coefficient in zigzag order | |
98 | */ | |
99 | static inline void restore_ac_coeffs(MpegEncContext *s, int16_t block[6][64], | |
100 | const int dir[6], uint8_t *st[6], | |
101 | const int zigzag_last_index[6]) | |
102 | { | |
103 | int i, n; | |
104 | memcpy(s->block_last_index, zigzag_last_index, sizeof(int) * 6); | |
105 | ||
106 | for (n = 0; n < 6; n++) { | |
107 | int16_t *ac_val = s->ac_val[0][0] + s->block_index[n] * 16; | |
108 | ||
109 | st[n] = s->intra_scantable.permutated; | |
110 | if (dir[n]) { | |
111 | /* top prediction */ | |
112 | for (i = 1; i < 8; i++) | |
113 | block[n][s->idsp.idct_permutation[i]] = ac_val[i + 8]; | |
114 | } else { | |
115 | /* left prediction */ | |
116 | for (i = 1; i < 8; i++) | |
117 | block[n][s->idsp.idct_permutation[i << 3]] = ac_val[i]; | |
118 | } | |
119 | } | |
120 | } | |
121 | ||
122 | /** | |
123 | * Return the optimal value (0 or 1) for the ac_pred element for the given MB in mpeg4. | |
124 | * This function will also update s->block_last_index and s->ac_val. | |
125 | * @param[in,out] block MB coefficients, these will be updated if 1 is returned | |
126 | * @param[in] dir ac prediction direction for each 8x8 block | |
127 | * @param[out] st scantable for each 8x8 block | |
128 | * @param[out] zigzag_last_index index referring to the last non zero coefficient in zigzag order | |
129 | */ | |
130 | static inline int decide_ac_pred(MpegEncContext *s, int16_t block[6][64], | |
131 | const int dir[6], uint8_t *st[6], | |
132 | int zigzag_last_index[6]) | |
133 | { | |
134 | int score = 0; | |
135 | int i, n; | |
136 | int8_t *const qscale_table = s->current_picture.qscale_table; | |
137 | ||
138 | memcpy(zigzag_last_index, s->block_last_index, sizeof(int) * 6); | |
139 | ||
140 | for (n = 0; n < 6; n++) { | |
141 | int16_t *ac_val, *ac_val1; | |
142 | ||
143 | score -= get_block_rate(s, block[n], s->block_last_index[n], | |
144 | s->intra_scantable.permutated); | |
145 | ||
146 | ac_val = s->ac_val[0][0] + s->block_index[n] * 16; | |
147 | ac_val1 = ac_val; | |
148 | if (dir[n]) { | |
149 | const int xy = s->mb_x + s->mb_y * s->mb_stride - s->mb_stride; | |
150 | /* top prediction */ | |
151 | ac_val -= s->block_wrap[n] * 16; | |
152 | if (s->mb_y == 0 || s->qscale == qscale_table[xy] || n == 2 || n == 3) { | |
153 | /* same qscale */ | |
154 | for (i = 1; i < 8; i++) { | |
155 | const int level = block[n][s->idsp.idct_permutation[i]]; | |
156 | block[n][s->idsp.idct_permutation[i]] = level - ac_val[i + 8]; | |
157 | ac_val1[i] = block[n][s->idsp.idct_permutation[i << 3]]; | |
158 | ac_val1[i + 8] = level; | |
159 | } | |
160 | } else { | |
161 | /* different qscale, we must rescale */ | |
162 | for (i = 1; i < 8; i++) { | |
163 | const int level = block[n][s->idsp.idct_permutation[i]]; | |
164 | block[n][s->idsp.idct_permutation[i]] = level - ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], s->qscale); | |
165 | ac_val1[i] = block[n][s->idsp.idct_permutation[i << 3]]; | |
166 | ac_val1[i + 8] = level; | |
167 | } | |
168 | } | |
169 | st[n] = s->intra_h_scantable.permutated; | |
170 | } else { | |
171 | const int xy = s->mb_x - 1 + s->mb_y * s->mb_stride; | |
172 | /* left prediction */ | |
173 | ac_val -= 16; | |
174 | if (s->mb_x == 0 || s->qscale == qscale_table[xy] || n == 1 || n == 3) { | |
175 | /* same qscale */ | |
176 | for (i = 1; i < 8; i++) { | |
177 | const int level = block[n][s->idsp.idct_permutation[i << 3]]; | |
178 | block[n][s->idsp.idct_permutation[i << 3]] = level - ac_val[i]; | |
179 | ac_val1[i] = level; | |
180 | ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]]; | |
181 | } | |
182 | } else { | |
183 | /* different qscale, we must rescale */ | |
184 | for (i = 1; i < 8; i++) { | |
185 | const int level = block[n][s->idsp.idct_permutation[i << 3]]; | |
186 | block[n][s->idsp.idct_permutation[i << 3]] = level - ROUNDED_DIV(ac_val[i] * qscale_table[xy], s->qscale); | |
187 | ac_val1[i] = level; | |
188 | ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]]; | |
189 | } | |
190 | } | |
191 | st[n] = s->intra_v_scantable.permutated; | |
192 | } | |
193 | ||
194 | for (i = 63; i > 0; i--) // FIXME optimize | |
195 | if (block[n][st[n][i]]) | |
196 | break; | |
197 | s->block_last_index[n] = i; | |
198 | ||
199 | score += get_block_rate(s, block[n], s->block_last_index[n], st[n]); | |
200 | } | |
201 | ||
202 | if (score < 0) { | |
203 | return 1; | |
204 | } else { | |
205 | restore_ac_coeffs(s, block, dir, st, zigzag_last_index); | |
206 | return 0; | |
207 | } | |
208 | } | |
209 | ||
210 | /** | |
211 | * modify mb_type & qscale so that encoding is actually possible in mpeg4 | |
212 | */ | |
213 | void ff_clean_mpeg4_qscales(MpegEncContext *s) | |
214 | { | |
215 | int i; | |
216 | int8_t *const qscale_table = s->current_picture.qscale_table; | |
217 | ||
218 | ff_clean_h263_qscales(s); | |
219 | ||
220 | if (s->pict_type == AV_PICTURE_TYPE_B) { | |
221 | int odd = 0; | |
222 | /* ok, come on, this isn't funny anymore, there's more code for | |
223 | * handling this mpeg4 mess than for the actual adaptive quantization */ | |
224 | ||
225 | for (i = 0; i < s->mb_num; i++) { | |
226 | int mb_xy = s->mb_index2xy[i]; | |
227 | odd += qscale_table[mb_xy] & 1; | |
228 | } | |
229 | ||
230 | if (2 * odd > s->mb_num) | |
231 | odd = 1; | |
232 | else | |
233 | odd = 0; | |
234 | ||
235 | for (i = 0; i < s->mb_num; i++) { | |
236 | int mb_xy = s->mb_index2xy[i]; | |
237 | if ((qscale_table[mb_xy] & 1) != odd) | |
238 | qscale_table[mb_xy]++; | |
239 | if (qscale_table[mb_xy] > 31) | |
240 | qscale_table[mb_xy] = 31; | |
241 | } | |
242 | ||
243 | for (i = 1; i < s->mb_num; i++) { | |
244 | int mb_xy = s->mb_index2xy[i]; | |
245 | if (qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i - 1]] && | |
246 | (s->mb_type[mb_xy] & CANDIDATE_MB_TYPE_DIRECT)) { | |
247 | s->mb_type[mb_xy] |= CANDIDATE_MB_TYPE_BIDIR; | |
248 | } | |
249 | } | |
250 | } | |
251 | } | |
252 | ||
253 | /** | |
254 | * Encode the dc value. | |
255 | * @param n block index (0-3 are luma, 4-5 are chroma) | |
256 | */ | |
257 | static inline void mpeg4_encode_dc(PutBitContext *s, int level, int n) | |
258 | { | |
259 | #if 1 | |
260 | /* DC will overflow if level is outside the [-255,255] range. */ | |
261 | level += 256; | |
262 | if (n < 4) { | |
263 | /* luminance */ | |
264 | put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]); | |
265 | } else { | |
266 | /* chrominance */ | |
267 | put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]); | |
268 | } | |
269 | #else | |
270 | int size, v; | |
271 | /* find number of bits */ | |
272 | size = 0; | |
273 | v = abs(level); | |
274 | while (v) { | |
275 | v >>= 1; | |
276 | size++; | |
277 | } | |
278 | ||
279 | if (n < 4) { | |
280 | /* luminance */ | |
281 | put_bits(s, ff_mpeg4_DCtab_lum[size][1], ff_mpeg4_DCtab_lum[size][0]); | |
282 | } else { | |
283 | /* chrominance */ | |
284 | put_bits(s, ff_mpeg4_DCtab_chrom[size][1], ff_mpeg4_DCtab_chrom[size][0]); | |
285 | } | |
286 | ||
287 | /* encode remaining bits */ | |
288 | if (size > 0) { | |
289 | if (level < 0) | |
290 | level = (-level) ^ ((1 << size) - 1); | |
291 | put_bits(s, size, level); | |
292 | if (size > 8) | |
293 | put_bits(s, 1, 1); | |
294 | } | |
295 | #endif | |
296 | } | |
297 | ||
298 | static inline int mpeg4_get_dc_length(int level, int n) | |
299 | { | |
300 | if (n < 4) | |
301 | return uni_DCtab_lum_len[level + 256]; | |
302 | else | |
303 | return uni_DCtab_chrom_len[level + 256]; | |
304 | } | |
305 | ||
306 | /** | |
307 | * Encode an 8x8 block. | |
308 | * @param n block index (0-3 are luma, 4-5 are chroma) | |
309 | */ | |
310 | static inline void mpeg4_encode_block(MpegEncContext *s, | |
311 | int16_t *block, int n, int intra_dc, | |
312 | uint8_t *scan_table, PutBitContext *dc_pb, | |
313 | PutBitContext *ac_pb) | |
314 | { | |
315 | int i, last_non_zero; | |
316 | uint32_t *bits_tab; | |
317 | uint8_t *len_tab; | |
318 | const int last_index = s->block_last_index[n]; | |
319 | ||
320 | if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away | |
321 | /* mpeg4 based DC predictor */ | |
322 | mpeg4_encode_dc(dc_pb, intra_dc, n); | |
323 | if (last_index < 1) | |
324 | return; | |
325 | i = 1; | |
326 | bits_tab = uni_mpeg4_intra_rl_bits; | |
327 | len_tab = uni_mpeg4_intra_rl_len; | |
328 | } else { | |
329 | if (last_index < 0) | |
330 | return; | |
331 | i = 0; | |
332 | bits_tab = uni_mpeg4_inter_rl_bits; | |
333 | len_tab = uni_mpeg4_inter_rl_len; | |
334 | } | |
335 | ||
336 | /* AC coefs */ | |
337 | last_non_zero = i - 1; | |
338 | for (; i < last_index; i++) { | |
339 | int level = block[scan_table[i]]; | |
340 | if (level) { | |
341 | int run = i - last_non_zero - 1; | |
342 | level += 64; | |
343 | if ((level & (~127)) == 0) { | |
344 | const int index = UNI_MPEG4_ENC_INDEX(0, run, level); | |
345 | put_bits(ac_pb, len_tab[index], bits_tab[index]); | |
346 | } else { // ESC3 | |
347 | put_bits(ac_pb, | |
348 | 7 + 2 + 1 + 6 + 1 + 12 + 1, | |
349 | (3 << 23) + (3 << 21) + (0 << 20) + (run << 14) + | |
350 | (1 << 13) + (((level - 64) & 0xfff) << 1) + 1); | |
351 | } | |
352 | last_non_zero = i; | |
353 | } | |
354 | } | |
355 | /* if (i <= last_index) */ { | |
356 | int level = block[scan_table[i]]; | |
357 | int run = i - last_non_zero - 1; | |
358 | level += 64; | |
359 | if ((level & (~127)) == 0) { | |
360 | const int index = UNI_MPEG4_ENC_INDEX(1, run, level); | |
361 | put_bits(ac_pb, len_tab[index], bits_tab[index]); | |
362 | } else { // ESC3 | |
363 | put_bits(ac_pb, | |
364 | 7 + 2 + 1 + 6 + 1 + 12 + 1, | |
365 | (3 << 23) + (3 << 21) + (1 << 20) + (run << 14) + | |
366 | (1 << 13) + (((level - 64) & 0xfff) << 1) + 1); | |
367 | } | |
368 | } | |
369 | } | |
370 | ||
371 | static int mpeg4_get_block_length(MpegEncContext *s, | |
372 | int16_t *block, int n, | |
373 | int intra_dc, uint8_t *scan_table) | |
374 | { | |
375 | int i, last_non_zero; | |
376 | uint8_t *len_tab; | |
377 | const int last_index = s->block_last_index[n]; | |
378 | int len = 0; | |
379 | ||
380 | if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away | |
381 | /* mpeg4 based DC predictor */ | |
382 | len += mpeg4_get_dc_length(intra_dc, n); | |
383 | if (last_index < 1) | |
384 | return len; | |
385 | i = 1; | |
386 | len_tab = uni_mpeg4_intra_rl_len; | |
387 | } else { | |
388 | if (last_index < 0) | |
389 | return 0; | |
390 | i = 0; | |
391 | len_tab = uni_mpeg4_inter_rl_len; | |
392 | } | |
393 | ||
394 | /* AC coefs */ | |
395 | last_non_zero = i - 1; | |
396 | for (; i < last_index; i++) { | |
397 | int level = block[scan_table[i]]; | |
398 | if (level) { | |
399 | int run = i - last_non_zero - 1; | |
400 | level += 64; | |
401 | if ((level & (~127)) == 0) { | |
402 | const int index = UNI_MPEG4_ENC_INDEX(0, run, level); | |
403 | len += len_tab[index]; | |
404 | } else { // ESC3 | |
405 | len += 7 + 2 + 1 + 6 + 1 + 12 + 1; | |
406 | } | |
407 | last_non_zero = i; | |
408 | } | |
409 | } | |
410 | /* if (i <= last_index) */ { | |
411 | int level = block[scan_table[i]]; | |
412 | int run = i - last_non_zero - 1; | |
413 | level += 64; | |
414 | if ((level & (~127)) == 0) { | |
415 | const int index = UNI_MPEG4_ENC_INDEX(1, run, level); | |
416 | len += len_tab[index]; | |
417 | } else { // ESC3 | |
418 | len += 7 + 2 + 1 + 6 + 1 + 12 + 1; | |
419 | } | |
420 | } | |
421 | ||
422 | return len; | |
423 | } | |
424 | ||
425 | static inline void mpeg4_encode_blocks(MpegEncContext *s, int16_t block[6][64], | |
426 | int intra_dc[6], uint8_t **scan_table, | |
427 | PutBitContext *dc_pb, | |
428 | PutBitContext *ac_pb) | |
429 | { | |
430 | int i; | |
431 | ||
432 | if (scan_table) { | |
433 | if (s->flags2 & CODEC_FLAG2_NO_OUTPUT) { | |
434 | for (i = 0; i < 6; i++) | |
435 | skip_put_bits(&s->pb, | |
436 | mpeg4_get_block_length(s, block[i], i, | |
437 | intra_dc[i], scan_table[i])); | |
438 | } else { | |
439 | /* encode each block */ | |
440 | for (i = 0; i < 6; i++) | |
441 | mpeg4_encode_block(s, block[i], i, | |
442 | intra_dc[i], scan_table[i], dc_pb, ac_pb); | |
443 | } | |
444 | } else { | |
445 | if (s->flags2 & CODEC_FLAG2_NO_OUTPUT) { | |
446 | for (i = 0; i < 6; i++) | |
447 | skip_put_bits(&s->pb, | |
448 | mpeg4_get_block_length(s, block[i], i, 0, | |
449 | s->intra_scantable.permutated)); | |
450 | } else { | |
451 | /* encode each block */ | |
452 | for (i = 0; i < 6; i++) | |
453 | mpeg4_encode_block(s, block[i], i, 0, | |
454 | s->intra_scantable.permutated, dc_pb, ac_pb); | |
455 | } | |
456 | } | |
457 | } | |
458 | ||
459 | static inline int get_b_cbp(MpegEncContext *s, int16_t block[6][64], | |
460 | int motion_x, int motion_y, int mb_type) | |
461 | { | |
462 | int cbp = 0, i; | |
463 | ||
464 | if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) { | |
465 | int score = 0; | |
466 | const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6); | |
467 | ||
468 | for (i = 0; i < 6; i++) { | |
469 | if (s->coded_score[i] < 0) { | |
470 | score += s->coded_score[i]; | |
471 | cbp |= 1 << (5 - i); | |
472 | } | |
473 | } | |
474 | ||
475 | if (cbp) { | |
476 | int zero_score = -6; | |
477 | if ((motion_x | motion_y | s->dquant | mb_type) == 0) | |
478 | zero_score -= 4; // 2 * MV + mb_type + cbp bit | |
479 | ||
480 | zero_score *= lambda; | |
481 | if (zero_score <= score) | |
482 | cbp = 0; | |
483 | } | |
484 | ||
485 | for (i = 0; i < 6; i++) { | |
486 | if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i)) & 1) == 0) { | |
487 | s->block_last_index[i] = -1; | |
488 | s->bdsp.clear_block(s->block[i]); | |
489 | } | |
490 | } | |
491 | } else { | |
492 | for (i = 0; i < 6; i++) { | |
493 | if (s->block_last_index[i] >= 0) | |
494 | cbp |= 1 << (5 - i); | |
495 | } | |
496 | } | |
497 | return cbp; | |
498 | } | |
499 | ||
500 | // FIXME this is duplicated to h263.c | |
501 | static const int dquant_code[5] = { 1, 0, 9, 2, 3 }; | |
502 | ||
503 | void ff_mpeg4_encode_mb(MpegEncContext *s, int16_t block[6][64], | |
504 | int motion_x, int motion_y) | |
505 | { | |
506 | int cbpc, cbpy, pred_x, pred_y; | |
507 | PutBitContext *const pb2 = s->data_partitioning ? &s->pb2 : &s->pb; | |
508 | PutBitContext *const tex_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb; | |
509 | PutBitContext *const dc_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb; | |
510 | const int interleaved_stats = (s->flags & CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0; | |
511 | ||
512 | if (!s->mb_intra) { | |
513 | int i, cbp; | |
514 | ||
515 | if (s->pict_type == AV_PICTURE_TYPE_B) { | |
516 | /* convert from mv_dir to type */ | |
517 | static const int mb_type_table[8] = { -1, 3, 2, 1, -1, -1, -1, 0 }; | |
518 | int mb_type = mb_type_table[s->mv_dir]; | |
519 | ||
520 | if (s->mb_x == 0) { | |
521 | for (i = 0; i < 2; i++) | |
522 | s->last_mv[i][0][0] = | |
523 | s->last_mv[i][0][1] = | |
524 | s->last_mv[i][1][0] = | |
525 | s->last_mv[i][1][1] = 0; | |
526 | } | |
527 | ||
528 | av_assert2(s->dquant >= -2 && s->dquant <= 2); | |
529 | av_assert2((s->dquant & 1) == 0); | |
530 | av_assert2(mb_type >= 0); | |
531 | ||
532 | /* nothing to do if this MB was skipped in the next P Frame */ | |
533 | if (s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]) { // FIXME avoid DCT & ... | |
534 | s->skip_count++; | |
535 | s->mv[0][0][0] = | |
536 | s->mv[0][0][1] = | |
537 | s->mv[1][0][0] = | |
538 | s->mv[1][0][1] = 0; | |
539 | s->mv_dir = MV_DIR_FORWARD; // doesn't matter | |
540 | s->qscale -= s->dquant; | |
541 | // s->mb_skipped = 1; | |
542 | ||
543 | return; | |
544 | } | |
545 | ||
546 | cbp = get_b_cbp(s, block, motion_x, motion_y, mb_type); | |
547 | ||
548 | if ((cbp | motion_x | motion_y | mb_type) == 0) { | |
549 | /* direct MB with MV={0,0} */ | |
550 | av_assert2(s->dquant == 0); | |
551 | ||
552 | put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */ | |
553 | ||
554 | if (interleaved_stats) { | |
555 | s->misc_bits++; | |
556 | s->last_bits++; | |
557 | } | |
558 | s->skip_count++; | |
559 | return; | |
560 | } | |
561 | ||
562 | put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */ | |
563 | put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ // FIXME merge | |
564 | put_bits(&s->pb, mb_type + 1, 1); // this table is so simple that we don't need it :) | |
565 | if (cbp) | |
566 | put_bits(&s->pb, 6, cbp); | |
567 | ||
568 | if (cbp && mb_type) { | |
569 | if (s->dquant) | |
570 | put_bits(&s->pb, 2, (s->dquant >> 2) + 3); | |
571 | else | |
572 | put_bits(&s->pb, 1, 0); | |
573 | } else | |
574 | s->qscale -= s->dquant; | |
575 | ||
576 | if (!s->progressive_sequence) { | |
577 | if (cbp) | |
578 | put_bits(&s->pb, 1, s->interlaced_dct); | |
579 | if (mb_type) // not direct mode | |
580 | put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD); | |
581 | } | |
582 | ||
583 | if (interleaved_stats) | |
584 | s->misc_bits += get_bits_diff(s); | |
585 | ||
586 | if (!mb_type) { | |
587 | av_assert2(s->mv_dir & MV_DIRECT); | |
588 | ff_h263_encode_motion_vector(s, motion_x, motion_y, 1); | |
589 | s->b_count++; | |
590 | s->f_count++; | |
591 | } else { | |
592 | av_assert2(mb_type > 0 && mb_type < 4); | |
593 | if (s->mv_type != MV_TYPE_FIELD) { | |
594 | if (s->mv_dir & MV_DIR_FORWARD) { | |
595 | ff_h263_encode_motion_vector(s, | |
596 | s->mv[0][0][0] - s->last_mv[0][0][0], | |
597 | s->mv[0][0][1] - s->last_mv[0][0][1], | |
598 | s->f_code); | |
599 | s->last_mv[0][0][0] = | |
600 | s->last_mv[0][1][0] = s->mv[0][0][0]; | |
601 | s->last_mv[0][0][1] = | |
602 | s->last_mv[0][1][1] = s->mv[0][0][1]; | |
603 | s->f_count++; | |
604 | } | |
605 | if (s->mv_dir & MV_DIR_BACKWARD) { | |
606 | ff_h263_encode_motion_vector(s, | |
607 | s->mv[1][0][0] - s->last_mv[1][0][0], | |
608 | s->mv[1][0][1] - s->last_mv[1][0][1], | |
609 | s->b_code); | |
610 | s->last_mv[1][0][0] = | |
611 | s->last_mv[1][1][0] = s->mv[1][0][0]; | |
612 | s->last_mv[1][0][1] = | |
613 | s->last_mv[1][1][1] = s->mv[1][0][1]; | |
614 | s->b_count++; | |
615 | } | |
616 | } else { | |
617 | if (s->mv_dir & MV_DIR_FORWARD) { | |
618 | put_bits(&s->pb, 1, s->field_select[0][0]); | |
619 | put_bits(&s->pb, 1, s->field_select[0][1]); | |
620 | } | |
621 | if (s->mv_dir & MV_DIR_BACKWARD) { | |
622 | put_bits(&s->pb, 1, s->field_select[1][0]); | |
623 | put_bits(&s->pb, 1, s->field_select[1][1]); | |
624 | } | |
625 | if (s->mv_dir & MV_DIR_FORWARD) { | |
626 | for (i = 0; i < 2; i++) { | |
627 | ff_h263_encode_motion_vector(s, | |
628 | s->mv[0][i][0] - s->last_mv[0][i][0], | |
629 | s->mv[0][i][1] - s->last_mv[0][i][1] / 2, | |
630 | s->f_code); | |
631 | s->last_mv[0][i][0] = s->mv[0][i][0]; | |
632 | s->last_mv[0][i][1] = s->mv[0][i][1] * 2; | |
633 | } | |
634 | s->f_count++; | |
635 | } | |
636 | if (s->mv_dir & MV_DIR_BACKWARD) { | |
637 | for (i = 0; i < 2; i++) { | |
638 | ff_h263_encode_motion_vector(s, | |
639 | s->mv[1][i][0] - s->last_mv[1][i][0], | |
640 | s->mv[1][i][1] - s->last_mv[1][i][1] / 2, | |
641 | s->b_code); | |
642 | s->last_mv[1][i][0] = s->mv[1][i][0]; | |
643 | s->last_mv[1][i][1] = s->mv[1][i][1] * 2; | |
644 | } | |
645 | s->b_count++; | |
646 | } | |
647 | } | |
648 | } | |
649 | ||
650 | if (interleaved_stats) | |
651 | s->mv_bits += get_bits_diff(s); | |
652 | ||
653 | mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb); | |
654 | ||
655 | if (interleaved_stats) | |
656 | s->p_tex_bits += get_bits_diff(s); | |
657 | } else { /* s->pict_type==AV_PICTURE_TYPE_B */ | |
658 | cbp = get_p_cbp(s, block, motion_x, motion_y); | |
659 | ||
660 | if ((cbp | motion_x | motion_y | s->dquant) == 0 && | |
661 | s->mv_type == MV_TYPE_16X16) { | |
662 | /* check if the B frames can skip it too, as we must skip it | |
663 | * if we skip here why didn't they just compress | |
664 | * the skip-mb bits instead of reusing them ?! */ | |
665 | if (s->max_b_frames > 0) { | |
666 | int i; | |
667 | int x, y, offset; | |
668 | uint8_t *p_pic; | |
669 | ||
670 | x = s->mb_x * 16; | |
671 | y = s->mb_y * 16; | |
672 | ||
673 | offset = x + y * s->linesize; | |
674 | p_pic = s->new_picture.f->data[0] + offset; | |
675 | ||
676 | s->mb_skipped = 1; | |
677 | for (i = 0; i < s->max_b_frames; i++) { | |
678 | uint8_t *b_pic; | |
679 | int diff; | |
680 | Picture *pic = s->reordered_input_picture[i + 1]; | |
681 | ||
682 | if (!pic || pic->f->pict_type != AV_PICTURE_TYPE_B) | |
683 | break; | |
684 | ||
685 | b_pic = pic->f->data[0] + offset; | |
686 | if (!pic->shared) | |
687 | b_pic += INPLACE_OFFSET; | |
688 | ||
689 | if (x + 16 > s->width || y + 16 > s->height) { | |
690 | int x1, y1; | |
691 | int xe = FFMIN(16, s->width - x); | |
692 | int ye = FFMIN(16, s->height - y); | |
693 | diff = 0; | |
694 | for (y1 = 0; y1 < ye; y1++) { | |
695 | for (x1 = 0; x1 < xe; x1++) { | |
696 | diff += FFABS(p_pic[x1 + y1 * s->linesize] - b_pic[x1 + y1 * s->linesize]); | |
697 | } | |
698 | } | |
699 | diff = diff * 256 / (xe * ye); | |
700 | } else { | |
701 | diff = s->mecc.sad[0](NULL, p_pic, b_pic, s->linesize, 16); | |
702 | } | |
703 | if (diff > s->qscale * 70) { // FIXME check that 70 is optimal | |
704 | s->mb_skipped = 0; | |
705 | break; | |
706 | } | |
707 | } | |
708 | } else | |
709 | s->mb_skipped = 1; | |
710 | ||
711 | if (s->mb_skipped == 1) { | |
712 | /* skip macroblock */ | |
713 | put_bits(&s->pb, 1, 1); | |
714 | ||
715 | if (interleaved_stats) { | |
716 | s->misc_bits++; | |
717 | s->last_bits++; | |
718 | } | |
719 | s->skip_count++; | |
720 | ||
721 | return; | |
722 | } | |
723 | } | |
724 | ||
725 | put_bits(&s->pb, 1, 0); /* mb coded */ | |
726 | cbpc = cbp & 3; | |
727 | cbpy = cbp >> 2; | |
728 | cbpy ^= 0xf; | |
729 | if (s->mv_type == MV_TYPE_16X16) { | |
730 | if (s->dquant) | |
731 | cbpc += 8; | |
732 | put_bits(&s->pb, | |
733 | ff_h263_inter_MCBPC_bits[cbpc], | |
734 | ff_h263_inter_MCBPC_code[cbpc]); | |
735 | ||
736 | put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); | |
737 | if (s->dquant) | |
738 | put_bits(pb2, 2, dquant_code[s->dquant + 2]); | |
739 | ||
740 | if (!s->progressive_sequence) { | |
741 | if (cbp) | |
742 | put_bits(pb2, 1, s->interlaced_dct); | |
743 | put_bits(pb2, 1, 0); | |
744 | } | |
745 | ||
746 | if (interleaved_stats) | |
747 | s->misc_bits += get_bits_diff(s); | |
748 | ||
749 | /* motion vectors: 16x16 mode */ | |
750 | ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); | |
751 | ||
752 | ff_h263_encode_motion_vector(s, | |
753 | motion_x - pred_x, | |
754 | motion_y - pred_y, | |
755 | s->f_code); | |
756 | } else if (s->mv_type == MV_TYPE_FIELD) { | |
757 | if (s->dquant) | |
758 | cbpc += 8; | |
759 | put_bits(&s->pb, | |
760 | ff_h263_inter_MCBPC_bits[cbpc], | |
761 | ff_h263_inter_MCBPC_code[cbpc]); | |
762 | ||
763 | put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); | |
764 | if (s->dquant) | |
765 | put_bits(pb2, 2, dquant_code[s->dquant + 2]); | |
766 | ||
767 | av_assert2(!s->progressive_sequence); | |
768 | if (cbp) | |
769 | put_bits(pb2, 1, s->interlaced_dct); | |
770 | put_bits(pb2, 1, 1); | |
771 | ||
772 | if (interleaved_stats) | |
773 | s->misc_bits += get_bits_diff(s); | |
774 | ||
775 | /* motion vectors: 16x8 interlaced mode */ | |
776 | ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); | |
777 | pred_y /= 2; | |
778 | ||
779 | put_bits(&s->pb, 1, s->field_select[0][0]); | |
780 | put_bits(&s->pb, 1, s->field_select[0][1]); | |
781 | ||
782 | ff_h263_encode_motion_vector(s, | |
783 | s->mv[0][0][0] - pred_x, | |
784 | s->mv[0][0][1] - pred_y, | |
785 | s->f_code); | |
786 | ff_h263_encode_motion_vector(s, | |
787 | s->mv[0][1][0] - pred_x, | |
788 | s->mv[0][1][1] - pred_y, | |
789 | s->f_code); | |
790 | } else { | |
791 | av_assert2(s->mv_type == MV_TYPE_8X8); | |
792 | put_bits(&s->pb, | |
793 | ff_h263_inter_MCBPC_bits[cbpc + 16], | |
794 | ff_h263_inter_MCBPC_code[cbpc + 16]); | |
795 | put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); | |
796 | ||
797 | if (!s->progressive_sequence && cbp) | |
798 | put_bits(pb2, 1, s->interlaced_dct); | |
799 | ||
800 | if (interleaved_stats) | |
801 | s->misc_bits += get_bits_diff(s); | |
802 | ||
803 | for (i = 0; i < 4; i++) { | |
804 | /* motion vectors: 8x8 mode*/ | |
805 | ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y); | |
806 | ||
807 | ff_h263_encode_motion_vector(s, | |
808 | s->current_picture.motion_val[0][s->block_index[i]][0] - pred_x, | |
809 | s->current_picture.motion_val[0][s->block_index[i]][1] - pred_y, | |
810 | s->f_code); | |
811 | } | |
812 | } | |
813 | ||
814 | if (interleaved_stats) | |
815 | s->mv_bits += get_bits_diff(s); | |
816 | ||
817 | mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb); | |
818 | ||
819 | if (interleaved_stats) | |
820 | s->p_tex_bits += get_bits_diff(s); | |
821 | ||
822 | s->f_count++; | |
823 | } | |
824 | } else { | |
825 | int cbp; | |
826 | int dc_diff[6]; // dc values with the dc prediction subtracted | |
827 | int dir[6]; // prediction direction | |
828 | int zigzag_last_index[6]; | |
829 | uint8_t *scan_table[6]; | |
830 | int i; | |
831 | ||
832 | for (i = 0; i < 6; i++) | |
833 | dc_diff[i] = ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1); | |
834 | ||
835 | if (s->flags & CODEC_FLAG_AC_PRED) { | |
836 | s->ac_pred = decide_ac_pred(s, block, dir, scan_table, zigzag_last_index); | |
837 | } else { | |
838 | for (i = 0; i < 6; i++) | |
839 | scan_table[i] = s->intra_scantable.permutated; | |
840 | } | |
841 | ||
842 | /* compute cbp */ | |
843 | cbp = 0; | |
844 | for (i = 0; i < 6; i++) | |
845 | if (s->block_last_index[i] >= 1) | |
846 | cbp |= 1 << (5 - i); | |
847 | ||
848 | cbpc = cbp & 3; | |
849 | if (s->pict_type == AV_PICTURE_TYPE_I) { | |
850 | if (s->dquant) | |
851 | cbpc += 4; | |
852 | put_bits(&s->pb, | |
853 | ff_h263_intra_MCBPC_bits[cbpc], | |
854 | ff_h263_intra_MCBPC_code[cbpc]); | |
855 | } else { | |
856 | if (s->dquant) | |
857 | cbpc += 8; | |
858 | put_bits(&s->pb, 1, 0); /* mb coded */ | |
859 | put_bits(&s->pb, | |
860 | ff_h263_inter_MCBPC_bits[cbpc + 4], | |
861 | ff_h263_inter_MCBPC_code[cbpc + 4]); | |
862 | } | |
863 | put_bits(pb2, 1, s->ac_pred); | |
864 | cbpy = cbp >> 2; | |
865 | put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); | |
866 | if (s->dquant) | |
867 | put_bits(dc_pb, 2, dquant_code[s->dquant + 2]); | |
868 | ||
869 | if (!s->progressive_sequence) | |
870 | put_bits(dc_pb, 1, s->interlaced_dct); | |
871 | ||
872 | if (interleaved_stats) | |
873 | s->misc_bits += get_bits_diff(s); | |
874 | ||
875 | mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb); | |
876 | ||
877 | if (interleaved_stats) | |
878 | s->i_tex_bits += get_bits_diff(s); | |
879 | s->i_count++; | |
880 | ||
881 | /* restore ac coeffs & last_index stuff | |
882 | * if we messed them up with the prediction */ | |
883 | if (s->ac_pred) | |
884 | restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index); | |
885 | } | |
886 | } | |
887 | ||
888 | /** | |
889 | * add mpeg4 stuffing bits (01...1) | |
890 | */ | |
891 | void ff_mpeg4_stuffing(PutBitContext *pbc) | |
892 | { | |
893 | int length; | |
894 | put_bits(pbc, 1, 0); | |
895 | length = (-put_bits_count(pbc)) & 7; | |
896 | if (length) | |
897 | put_bits(pbc, length, (1 << length) - 1); | |
898 | } | |
899 | ||
900 | /* must be called before writing the header */ | |
901 | void ff_set_mpeg4_time(MpegEncContext *s) | |
902 | { | |
903 | if (s->pict_type == AV_PICTURE_TYPE_B) { | |
904 | ff_mpeg4_init_direct_mv(s); | |
905 | } else { | |
906 | s->last_time_base = s->time_base; | |
907 | s->time_base = FFUDIV(s->time, s->avctx->time_base.den); | |
908 | } | |
909 | } | |
910 | ||
911 | static void mpeg4_encode_gop_header(MpegEncContext *s) | |
912 | { | |
913 | int hours, minutes, seconds; | |
914 | int64_t time; | |
915 | ||
916 | put_bits(&s->pb, 16, 0); | |
917 | put_bits(&s->pb, 16, GOP_STARTCODE); | |
918 | ||
919 | time = s->current_picture_ptr->f->pts; | |
920 | if (s->reordered_input_picture[1]) | |
921 | time = FFMIN(time, s->reordered_input_picture[1]->f->pts); | |
922 | time = time * s->avctx->time_base.num; | |
923 | s->last_time_base = FFUDIV(time, s->avctx->time_base.den); | |
924 | ||
925 | seconds = FFUDIV(time, s->avctx->time_base.den); | |
926 | minutes = FFUDIV(seconds, 60); seconds = FFUMOD(seconds, 60); | |
927 | hours = FFUDIV(minutes, 60); minutes = FFUMOD(minutes, 60); | |
928 | hours = FFUMOD(hours , 24); | |
929 | ||
930 | put_bits(&s->pb, 5, hours); | |
931 | put_bits(&s->pb, 6, minutes); | |
932 | put_bits(&s->pb, 1, 1); | |
933 | put_bits(&s->pb, 6, seconds); | |
934 | ||
935 | put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP)); | |
936 | put_bits(&s->pb, 1, 0); // broken link == NO | |
937 | ||
938 | ff_mpeg4_stuffing(&s->pb); | |
939 | } | |
940 | ||
941 | static void mpeg4_encode_visual_object_header(MpegEncContext *s) | |
942 | { | |
943 | int profile_and_level_indication; | |
944 | int vo_ver_id; | |
945 | ||
946 | if (s->avctx->profile != FF_PROFILE_UNKNOWN) { | |
947 | profile_and_level_indication = s->avctx->profile << 4; | |
948 | } else if (s->max_b_frames || s->quarter_sample) { | |
949 | profile_and_level_indication = 0xF0; // adv simple | |
950 | } else { | |
951 | profile_and_level_indication = 0x00; // simple | |
952 | } | |
953 | ||
954 | if (s->avctx->level != FF_LEVEL_UNKNOWN) | |
955 | profile_and_level_indication |= s->avctx->level; | |
956 | else | |
957 | profile_and_level_indication |= 1; // level 1 | |
958 | ||
959 | if (profile_and_level_indication >> 4 == 0xF) | |
960 | vo_ver_id = 5; | |
961 | else | |
962 | vo_ver_id = 1; | |
963 | ||
964 | // FIXME levels | |
965 | ||
966 | put_bits(&s->pb, 16, 0); | |
967 | put_bits(&s->pb, 16, VOS_STARTCODE); | |
968 | ||
969 | put_bits(&s->pb, 8, profile_and_level_indication); | |
970 | ||
971 | put_bits(&s->pb, 16, 0); | |
972 | put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE); | |
973 | ||
974 | put_bits(&s->pb, 1, 1); | |
975 | put_bits(&s->pb, 4, vo_ver_id); | |
976 | put_bits(&s->pb, 3, 1); // priority | |
977 | ||
978 | put_bits(&s->pb, 4, 1); // visual obj type== video obj | |
979 | ||
980 | put_bits(&s->pb, 1, 0); // video signal type == no clue // FIXME | |
981 | ||
982 | ff_mpeg4_stuffing(&s->pb); | |
983 | } | |
984 | ||
985 | static void mpeg4_encode_vol_header(MpegEncContext *s, | |
986 | int vo_number, | |
987 | int vol_number) | |
988 | { | |
989 | int vo_ver_id; | |
990 | ||
991 | if (!CONFIG_MPEG4_ENCODER) | |
992 | return; | |
993 | ||
994 | if (s->max_b_frames || s->quarter_sample) { | |
995 | vo_ver_id = 5; | |
996 | s->vo_type = ADV_SIMPLE_VO_TYPE; | |
997 | } else { | |
998 | vo_ver_id = 1; | |
999 | s->vo_type = SIMPLE_VO_TYPE; | |
1000 | } | |
1001 | ||
1002 | put_bits(&s->pb, 16, 0); | |
1003 | put_bits(&s->pb, 16, 0x100 + vo_number); /* video obj */ | |
1004 | put_bits(&s->pb, 16, 0); | |
1005 | put_bits(&s->pb, 16, 0x120 + vol_number); /* video obj layer */ | |
1006 | ||
1007 | put_bits(&s->pb, 1, 0); /* random access vol */ | |
1008 | put_bits(&s->pb, 8, s->vo_type); /* video obj type indication */ | |
1009 | if (s->workaround_bugs & FF_BUG_MS) { | |
1010 | put_bits(&s->pb, 1, 0); /* is obj layer id= no */ | |
1011 | } else { | |
1012 | put_bits(&s->pb, 1, 1); /* is obj layer id= yes */ | |
1013 | put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */ | |
1014 | put_bits(&s->pb, 3, 1); /* is obj layer priority */ | |
1015 | } | |
1016 | ||
1017 | s->aspect_ratio_info = ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio); | |
1018 | ||
1019 | put_bits(&s->pb, 4, s->aspect_ratio_info); /* aspect ratio info */ | |
1020 | if (s->aspect_ratio_info == FF_ASPECT_EXTENDED) { | |
1021 | av_reduce(&s->avctx->sample_aspect_ratio.num, &s->avctx->sample_aspect_ratio.den, | |
1022 | s->avctx->sample_aspect_ratio.num, s->avctx->sample_aspect_ratio.den, 255); | |
1023 | put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num); | |
1024 | put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den); | |
1025 | } | |
1026 | ||
1027 | if (s->workaround_bugs & FF_BUG_MS) { | |
1028 | put_bits(&s->pb, 1, 0); /* vol control parameters= no @@@ */ | |
1029 | } else { | |
1030 | put_bits(&s->pb, 1, 1); /* vol control parameters= yes */ | |
1031 | put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */ | |
1032 | put_bits(&s->pb, 1, s->low_delay); | |
1033 | put_bits(&s->pb, 1, 0); /* vbv parameters= no */ | |
1034 | } | |
1035 | ||
1036 | put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */ | |
1037 | put_bits(&s->pb, 1, 1); /* marker bit */ | |
1038 | ||
1039 | put_bits(&s->pb, 16, s->avctx->time_base.den); | |
1040 | if (s->time_increment_bits < 1) | |
1041 | s->time_increment_bits = 1; | |
1042 | put_bits(&s->pb, 1, 1); /* marker bit */ | |
1043 | put_bits(&s->pb, 1, 0); /* fixed vop rate=no */ | |
1044 | put_bits(&s->pb, 1, 1); /* marker bit */ | |
1045 | put_bits(&s->pb, 13, s->width); /* vol width */ | |
1046 | put_bits(&s->pb, 1, 1); /* marker bit */ | |
1047 | put_bits(&s->pb, 13, s->height); /* vol height */ | |
1048 | put_bits(&s->pb, 1, 1); /* marker bit */ | |
1049 | put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1); | |
1050 | put_bits(&s->pb, 1, 1); /* obmc disable */ | |
1051 | if (vo_ver_id == 1) | |
1052 | put_bits(&s->pb, 1, 0); /* sprite enable */ | |
1053 | else | |
1054 | put_bits(&s->pb, 2, 0); /* sprite enable */ | |
1055 | ||
1056 | put_bits(&s->pb, 1, 0); /* not 8 bit == false */ | |
1057 | put_bits(&s->pb, 1, s->mpeg_quant); /* quant type= (0=h263 style)*/ | |
1058 | ||
1059 | if (s->mpeg_quant) { | |
1060 | ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix); | |
1061 | ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix); | |
1062 | } | |
1063 | ||
1064 | if (vo_ver_id != 1) | |
1065 | put_bits(&s->pb, 1, s->quarter_sample); | |
1066 | put_bits(&s->pb, 1, 1); /* complexity estimation disable */ | |
1067 | put_bits(&s->pb, 1, s->rtp_mode ? 0 : 1); /* resync marker disable */ | |
1068 | put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0); | |
1069 | if (s->data_partitioning) | |
1070 | put_bits(&s->pb, 1, 0); /* no rvlc */ | |
1071 | ||
1072 | if (vo_ver_id != 1) { | |
1073 | put_bits(&s->pb, 1, 0); /* newpred */ | |
1074 | put_bits(&s->pb, 1, 0); /* reduced res vop */ | |
1075 | } | |
1076 | put_bits(&s->pb, 1, 0); /* scalability */ | |
1077 | ||
1078 | ff_mpeg4_stuffing(&s->pb); | |
1079 | ||
1080 | /* user data */ | |
1081 | if (!(s->flags & CODEC_FLAG_BITEXACT)) { | |
1082 | put_bits(&s->pb, 16, 0); | |
1083 | put_bits(&s->pb, 16, 0x1B2); /* user_data */ | |
1084 | avpriv_put_string(&s->pb, LIBAVCODEC_IDENT, 0); | |
1085 | } | |
1086 | } | |
1087 | ||
1088 | /* write mpeg4 VOP header */ | |
1089 | void ff_mpeg4_encode_picture_header(MpegEncContext *s, int picture_number) | |
1090 | { | |
1091 | int time_incr; | |
1092 | int time_div, time_mod; | |
1093 | ||
1094 | if (s->pict_type == AV_PICTURE_TYPE_I) { | |
1095 | if (!(s->flags & CODEC_FLAG_GLOBAL_HEADER)) { | |
1096 | if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) // HACK, the reference sw is buggy | |
1097 | mpeg4_encode_visual_object_header(s); | |
1098 | if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number == 0) // HACK, the reference sw is buggy | |
1099 | mpeg4_encode_vol_header(s, 0, 0); | |
1100 | } | |
1101 | if (!(s->workaround_bugs & FF_BUG_MS)) | |
1102 | mpeg4_encode_gop_header(s); | |
1103 | } | |
1104 | ||
1105 | s->partitioned_frame = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B; | |
1106 | ||
1107 | put_bits(&s->pb, 16, 0); /* vop header */ | |
1108 | put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */ | |
1109 | put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */ | |
1110 | ||
1111 | time_div = FFUDIV(s->time, s->avctx->time_base.den); | |
1112 | time_mod = FFUMOD(s->time, s->avctx->time_base.den); | |
1113 | time_incr = time_div - s->last_time_base; | |
1114 | av_assert0(time_incr >= 0); | |
1115 | while (time_incr--) | |
1116 | put_bits(&s->pb, 1, 1); | |
1117 | ||
1118 | put_bits(&s->pb, 1, 0); | |
1119 | ||
1120 | put_bits(&s->pb, 1, 1); /* marker */ | |
1121 | put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */ | |
1122 | put_bits(&s->pb, 1, 1); /* marker */ | |
1123 | put_bits(&s->pb, 1, 1); /* vop coded */ | |
1124 | if (s->pict_type == AV_PICTURE_TYPE_P) { | |
1125 | put_bits(&s->pb, 1, s->no_rounding); /* rounding type */ | |
1126 | } | |
1127 | put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */ | |
1128 | if (!s->progressive_sequence) { | |
1129 | put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first); | |
1130 | put_bits(&s->pb, 1, s->alternate_scan); | |
1131 | } | |
1132 | // FIXME sprite stuff | |
1133 | ||
1134 | put_bits(&s->pb, 5, s->qscale); | |
1135 | ||
1136 | if (s->pict_type != AV_PICTURE_TYPE_I) | |
1137 | put_bits(&s->pb, 3, s->f_code); /* fcode_for */ | |
1138 | if (s->pict_type == AV_PICTURE_TYPE_B) | |
1139 | put_bits(&s->pb, 3, s->b_code); /* fcode_back */ | |
1140 | } | |
1141 | ||
1142 | static av_cold void init_uni_dc_tab(void) | |
1143 | { | |
1144 | int level, uni_code, uni_len; | |
1145 | ||
1146 | for (level = -256; level < 256; level++) { | |
1147 | int size, v, l; | |
1148 | /* find number of bits */ | |
1149 | size = 0; | |
1150 | v = abs(level); | |
1151 | while (v) { | |
1152 | v >>= 1; | |
1153 | size++; | |
1154 | } | |
1155 | ||
1156 | if (level < 0) | |
1157 | l = (-level) ^ ((1 << size) - 1); | |
1158 | else | |
1159 | l = level; | |
1160 | ||
1161 | /* luminance */ | |
1162 | uni_code = ff_mpeg4_DCtab_lum[size][0]; | |
1163 | uni_len = ff_mpeg4_DCtab_lum[size][1]; | |
1164 | ||
1165 | if (size > 0) { | |
1166 | uni_code <<= size; | |
1167 | uni_code |= l; | |
1168 | uni_len += size; | |
1169 | if (size > 8) { | |
1170 | uni_code <<= 1; | |
1171 | uni_code |= 1; | |
1172 | uni_len++; | |
1173 | } | |
1174 | } | |
1175 | uni_DCtab_lum_bits[level + 256] = uni_code; | |
1176 | uni_DCtab_lum_len[level + 256] = uni_len; | |
1177 | ||
1178 | /* chrominance */ | |
1179 | uni_code = ff_mpeg4_DCtab_chrom[size][0]; | |
1180 | uni_len = ff_mpeg4_DCtab_chrom[size][1]; | |
1181 | ||
1182 | if (size > 0) { | |
1183 | uni_code <<= size; | |
1184 | uni_code |= l; | |
1185 | uni_len += size; | |
1186 | if (size > 8) { | |
1187 | uni_code <<= 1; | |
1188 | uni_code |= 1; | |
1189 | uni_len++; | |
1190 | } | |
1191 | } | |
1192 | uni_DCtab_chrom_bits[level + 256] = uni_code; | |
1193 | uni_DCtab_chrom_len[level + 256] = uni_len; | |
1194 | } | |
1195 | } | |
1196 | ||
1197 | static av_cold void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab, | |
1198 | uint8_t *len_tab) | |
1199 | { | |
1200 | int slevel, run, last; | |
1201 | ||
1202 | av_assert0(MAX_LEVEL >= 64); | |
1203 | av_assert0(MAX_RUN >= 63); | |
1204 | ||
1205 | for (slevel = -64; slevel < 64; slevel++) { | |
1206 | if (slevel == 0) | |
1207 | continue; | |
1208 | for (run = 0; run < 64; run++) { | |
1209 | for (last = 0; last <= 1; last++) { | |
1210 | const int index = UNI_MPEG4_ENC_INDEX(last, run, slevel + 64); | |
1211 | int level = slevel < 0 ? -slevel : slevel; | |
1212 | int sign = slevel < 0 ? 1 : 0; | |
1213 | int bits, len, code; | |
1214 | int level1, run1; | |
1215 | ||
1216 | len_tab[index] = 100; | |
1217 | ||
1218 | /* ESC0 */ | |
1219 | code = get_rl_index(rl, last, run, level); | |
1220 | bits = rl->table_vlc[code][0]; | |
1221 | len = rl->table_vlc[code][1]; | |
1222 | bits = bits * 2 + sign; | |
1223 | len++; | |
1224 | ||
1225 | if (code != rl->n && len < len_tab[index]) { | |
1226 | bits_tab[index] = bits; | |
1227 | len_tab[index] = len; | |
1228 | } | |
1229 | /* ESC1 */ | |
1230 | bits = rl->table_vlc[rl->n][0]; | |
1231 | len = rl->table_vlc[rl->n][1]; | |
1232 | bits = bits * 2; | |
1233 | len++; // esc1 | |
1234 | level1 = level - rl->max_level[last][run]; | |
1235 | if (level1 > 0) { | |
1236 | code = get_rl_index(rl, last, run, level1); | |
1237 | bits <<= rl->table_vlc[code][1]; | |
1238 | len += rl->table_vlc[code][1]; | |
1239 | bits += rl->table_vlc[code][0]; | |
1240 | bits = bits * 2 + sign; | |
1241 | len++; | |
1242 | ||
1243 | if (code != rl->n && len < len_tab[index]) { | |
1244 | bits_tab[index] = bits; | |
1245 | len_tab[index] = len; | |
1246 | } | |
1247 | } | |
1248 | /* ESC2 */ | |
1249 | bits = rl->table_vlc[rl->n][0]; | |
1250 | len = rl->table_vlc[rl->n][1]; | |
1251 | bits = bits * 4 + 2; | |
1252 | len += 2; // esc2 | |
1253 | run1 = run - rl->max_run[last][level] - 1; | |
1254 | if (run1 >= 0) { | |
1255 | code = get_rl_index(rl, last, run1, level); | |
1256 | bits <<= rl->table_vlc[code][1]; | |
1257 | len += rl->table_vlc[code][1]; | |
1258 | bits += rl->table_vlc[code][0]; | |
1259 | bits = bits * 2 + sign; | |
1260 | len++; | |
1261 | ||
1262 | if (code != rl->n && len < len_tab[index]) { | |
1263 | bits_tab[index] = bits; | |
1264 | len_tab[index] = len; | |
1265 | } | |
1266 | } | |
1267 | /* ESC3 */ | |
1268 | bits = rl->table_vlc[rl->n][0]; | |
1269 | len = rl->table_vlc[rl->n][1]; | |
1270 | bits = bits * 4 + 3; | |
1271 | len += 2; // esc3 | |
1272 | bits = bits * 2 + last; | |
1273 | len++; | |
1274 | bits = bits * 64 + run; | |
1275 | len += 6; | |
1276 | bits = bits * 2 + 1; | |
1277 | len++; // marker | |
1278 | bits = bits * 4096 + (slevel & 0xfff); | |
1279 | len += 12; | |
1280 | bits = bits * 2 + 1; | |
1281 | len++; // marker | |
1282 | ||
1283 | if (len < len_tab[index]) { | |
1284 | bits_tab[index] = bits; | |
1285 | len_tab[index] = len; | |
1286 | } | |
1287 | } | |
1288 | } | |
1289 | } | |
1290 | } | |
1291 | ||
1292 | static av_cold int encode_init(AVCodecContext *avctx) | |
1293 | { | |
1294 | MpegEncContext *s = avctx->priv_data; | |
1295 | int ret; | |
1296 | static int done = 0; | |
1297 | ||
1298 | if (avctx->width >= (1<<13) || avctx->height >= (1<<13)) { | |
1299 | av_log(avctx, AV_LOG_ERROR, "dimensions too large for MPEG-4\n"); | |
1300 | return AVERROR(EINVAL); | |
1301 | } | |
1302 | ||
1303 | if ((ret = ff_mpv_encode_init(avctx)) < 0) | |
1304 | return ret; | |
1305 | ||
1306 | if (!done) { | |
1307 | done = 1; | |
1308 | ||
1309 | init_uni_dc_tab(); | |
1310 | ||
1311 | ff_init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]); | |
1312 | ||
1313 | init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len); | |
1314 | init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len); | |
1315 | } | |
1316 | ||
1317 | s->min_qcoeff = -2048; | |
1318 | s->max_qcoeff = 2047; | |
1319 | s->intra_ac_vlc_length = uni_mpeg4_intra_rl_len; | |
1320 | s->intra_ac_vlc_last_length = uni_mpeg4_intra_rl_len + 128 * 64; | |
1321 | s->inter_ac_vlc_length = uni_mpeg4_inter_rl_len; | |
1322 | s->inter_ac_vlc_last_length = uni_mpeg4_inter_rl_len + 128 * 64; | |
1323 | s->luma_dc_vlc_length = uni_DCtab_lum_len; | |
1324 | s->ac_esc_length = 7 + 2 + 1 + 6 + 1 + 12 + 1; | |
1325 | s->y_dc_scale_table = ff_mpeg4_y_dc_scale_table; | |
1326 | s->c_dc_scale_table = ff_mpeg4_c_dc_scale_table; | |
1327 | ||
1328 | if (s->flags & CODEC_FLAG_GLOBAL_HEADER) { | |
1329 | s->avctx->extradata = av_malloc(1024); | |
1330 | init_put_bits(&s->pb, s->avctx->extradata, 1024); | |
1331 | ||
1332 | if (!(s->workaround_bugs & FF_BUG_MS)) | |
1333 | mpeg4_encode_visual_object_header(s); | |
1334 | mpeg4_encode_vol_header(s, 0, 0); | |
1335 | ||
1336 | // ff_mpeg4_stuffing(&s->pb); ? | |
1337 | flush_put_bits(&s->pb); | |
1338 | s->avctx->extradata_size = (put_bits_count(&s->pb) + 7) >> 3; | |
1339 | } | |
1340 | return 0; | |
1341 | } | |
1342 | ||
1343 | void ff_mpeg4_init_partitions(MpegEncContext *s) | |
1344 | { | |
1345 | uint8_t *start = put_bits_ptr(&s->pb); | |
1346 | uint8_t *end = s->pb.buf_end; | |
1347 | int size = end - start; | |
1348 | int pb_size = (((intptr_t)start + size / 3) & (~3)) - (intptr_t)start; | |
1349 | int tex_size = (size - 2 * pb_size) & (~3); | |
1350 | ||
1351 | set_put_bits_buffer_size(&s->pb, pb_size); | |
1352 | init_put_bits(&s->tex_pb, start + pb_size, tex_size); | |
1353 | init_put_bits(&s->pb2, start + pb_size + tex_size, pb_size); | |
1354 | } | |
1355 | ||
1356 | void ff_mpeg4_merge_partitions(MpegEncContext *s) | |
1357 | { | |
1358 | const int pb2_len = put_bits_count(&s->pb2); | |
1359 | const int tex_pb_len = put_bits_count(&s->tex_pb); | |
1360 | const int bits = put_bits_count(&s->pb); | |
1361 | ||
1362 | if (s->pict_type == AV_PICTURE_TYPE_I) { | |
1363 | put_bits(&s->pb, 19, DC_MARKER); | |
1364 | s->misc_bits += 19 + pb2_len + bits - s->last_bits; | |
1365 | s->i_tex_bits += tex_pb_len; | |
1366 | } else { | |
1367 | put_bits(&s->pb, 17, MOTION_MARKER); | |
1368 | s->misc_bits += 17 + pb2_len; | |
1369 | s->mv_bits += bits - s->last_bits; | |
1370 | s->p_tex_bits += tex_pb_len; | |
1371 | } | |
1372 | ||
1373 | flush_put_bits(&s->pb2); | |
1374 | flush_put_bits(&s->tex_pb); | |
1375 | ||
1376 | set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf); | |
1377 | avpriv_copy_bits(&s->pb, s->pb2.buf, pb2_len); | |
1378 | avpriv_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len); | |
1379 | s->last_bits = put_bits_count(&s->pb); | |
1380 | } | |
1381 | ||
1382 | void ff_mpeg4_encode_video_packet_header(MpegEncContext *s) | |
1383 | { | |
1384 | int mb_num_bits = av_log2(s->mb_num - 1) + 1; | |
1385 | ||
1386 | put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s), 0); | |
1387 | put_bits(&s->pb, 1, 1); | |
1388 | ||
1389 | put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y * s->mb_width); | |
1390 | put_bits(&s->pb, s->quant_precision, s->qscale); | |
1391 | put_bits(&s->pb, 1, 0); /* no HEC */ | |
1392 | } | |
1393 | ||
1394 | #define OFFSET(x) offsetof(MpegEncContext, x) | |
1395 | #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM | |
1396 | static const AVOption options[] = { | |
1397 | { "data_partitioning", "Use data partitioning.", OFFSET(data_partitioning), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, | |
1398 | { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, | |
1399 | FF_MPV_COMMON_OPTS | |
1400 | { NULL }, | |
1401 | }; | |
1402 | ||
1403 | static const AVClass mpeg4enc_class = { | |
1404 | .class_name = "MPEG4 encoder", | |
1405 | .item_name = av_default_item_name, | |
1406 | .option = options, | |
1407 | .version = LIBAVUTIL_VERSION_INT, | |
1408 | }; | |
1409 | ||
1410 | AVCodec ff_mpeg4_encoder = { | |
1411 | .name = "mpeg4", | |
1412 | .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"), | |
1413 | .type = AVMEDIA_TYPE_VIDEO, | |
1414 | .id = AV_CODEC_ID_MPEG4, | |
1415 | .priv_data_size = sizeof(MpegEncContext), | |
1416 | .init = encode_init, | |
1417 | .encode2 = ff_mpv_encode_picture, | |
1418 | .close = ff_mpv_encode_end, | |
1419 | .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, | |
1420 | .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS, | |
1421 | .priv_class = &mpeg4enc_class, | |
1422 | }; |