FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/mpeg4videoenc.c
Date: 2024-04-25 15:36:26
Exec Total Coverage
Lines: 616 782 78.8%
Functions: 22 24 91.7%
Branches: 301 438 68.7%
Line Branch Exec Source
1 /*
2 * MPEG-4 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/mem.h"
26 #include "libavutil/opt.h"
27 #include "libavutil/thread.h"
28 #include "codec_internal.h"
29 #include "mpegvideo.h"
30 #include "h263.h"
31 #include "h263enc.h"
32 #include "mpeg4video.h"
33 #include "mpeg4videodata.h"
34 #include "mpeg4videodefs.h"
35 #include "mpeg4videoenc.h"
36 #include "mpegvideoenc.h"
37 #include "profiles.h"
38 #include "version.h"
39
40 /* The uni_DCtab_* tables below contain unified bits+length tables to encode DC
41 * differences in MPEG-4. Unified in the sense that the specification specifies
42 * this encoding in several steps. */
43 static uint8_t uni_DCtab_lum_len[512];
44 static uint8_t uni_DCtab_chrom_len[512];
45 static uint16_t uni_DCtab_lum_bits[512];
46 static uint16_t uni_DCtab_chrom_bits[512];
47
48 /* Unified encoding tables for run length encoding of coefficients.
49 * Unified in the sense that the specification specifies the encoding in several steps. */
50 static uint32_t uni_mpeg4_intra_rl_bits[64 * 64 * 2 * 2];
51 static uint8_t uni_mpeg4_intra_rl_len[64 * 64 * 2 * 2];
52 static uint32_t uni_mpeg4_inter_rl_bits[64 * 64 * 2 * 2];
53 static uint8_t uni_mpeg4_inter_rl_len[64 * 64 * 2 * 2];
54
55 //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 + (run) * 256 + (level))
56 //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) + (level) * 64)
57 #define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) * 128 + (level))
58
59 /* MPEG-4
60 * inter
61 * max level: 24/6
62 * max run: 53/63
63 *
64 * intra
65 * max level: 53/16
66 * max run: 29/41
67 */
68
69 /**
70 * Return the number of bits that encoding the 8x8 block in block would need.
71 * @param[in] block_last_index last index in scantable order that refers to a non zero element in block.
72 */
73 585288 static inline int get_block_rate(MpegEncContext *s, int16_t block[64],
74 int block_last_index, uint8_t scantable[64])
75 {
76 585288 int last = 0;
77 int j;
78 585288 int rate = 0;
79
80
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 12547868 for (j = 1; j <= block_last_index; j++) {
81 11962580 const int index = scantable[j];
82 11962580 int level = block[index];
83
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 11962580 if (level) {
84 5655201 level += 64;
85
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 5655201 if ((level & (~127)) == 0) {
86
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 5653593 if (j < block_last_index)
87 5215921 rate += s->intra_ac_vlc_length[UNI_AC_ENC_INDEX(j - last - 1, level)];
88 else
89 437672 rate += s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j - last - 1, level)];
90 } else
91 1608 rate += s->ac_esc_length;
92
93 5655201 last = j;
94 }
95 }
96
97 585288 return rate;
98 }
99
100 /**
101 * Restore the ac coefficients in block that have been changed by decide_ac_pred().
102 * This function also restores s->block_last_index.
103 * @param[in,out] block MB coefficients, these will be restored
104 * @param[in] dir ac prediction direction for each 8x8 block
105 * @param[out] st scantable for each 8x8 block
106 * @param[in] zigzag_last_index index referring to the last non zero coefficient in zigzag order
107 */
108 48774 static inline void restore_ac_coeffs(MpegEncContext *s, int16_t block[6][64],
109 const int dir[6], uint8_t *st[6],
110 const int zigzag_last_index[6])
111 {
112 int i, n;
113 48774 memcpy(s->block_last_index, zigzag_last_index, sizeof(int) * 6);
114
115
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 341418 for (n = 0; n < 6; n++) {
116 292644 int16_t *ac_val = &s->ac_val[0][0][0] + s->block_index[n] * 16;
117
118 292644 st[n] = s->intra_scantable.permutated;
119
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 292644 if (dir[n]) {
120 /* top prediction */
121
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 641160 for (i = 1; i < 8; i++)
122 561015 block[n][s->idsp.idct_permutation[i]] = ac_val[i + 8];
123 } else {
124 /* left prediction */
125
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 1699992 for (i = 1; i < 8; i++)
126 1487493 block[n][s->idsp.idct_permutation[i << 3]] = ac_val[i];
127 }
128 }
129 48774 }
130
131 /**
132 * Return the optimal value (0 or 1) for the ac_pred element for the given MB in MPEG-4.
133 * This function will also update s->block_last_index and s->ac_val.
134 * @param[in,out] block MB coefficients, these will be updated if 1 is returned
135 * @param[in] dir ac prediction direction for each 8x8 block
136 * @param[out] st scantable for each 8x8 block
137 * @param[out] zigzag_last_index index referring to the last non zero coefficient in zigzag order
138 */
139 48774 static inline int decide_ac_pred(MpegEncContext *s, int16_t block[6][64],
140 const int dir[6], uint8_t *st[6],
141 int zigzag_last_index[6])
142 {
143 48774 int score = 0;
144 int i, n;
145 48774 int8_t *const qscale_table = s->current_picture.qscale_table;
146
147 48774 memcpy(zigzag_last_index, s->block_last_index, sizeof(int) * 6);
148
149
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 341418 for (n = 0; n < 6; n++) {
150 int16_t *ac_val, *ac_val1;
151
152 585288 score -= get_block_rate(s, block[n], s->block_last_index[n],
153 292644 s->intra_scantable.permutated);
154
155 292644 ac_val = &s->ac_val[0][0][0] + s->block_index[n] * 16;
156 292644 ac_val1 = ac_val;
157
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 292644 if (dir[n]) {
158 80145 const int xy = s->mb_x + s->mb_y * s->mb_stride - s->mb_stride;
159 /* top prediction */
160 80145 ac_val -= s->block_wrap[n] * 16;
161
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 80145 if (s->mb_y == 0 || s->qscale == qscale_table[xy] || n == 2 || n == 3) {
162 /* same qscale */
163
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 641160 for (i = 1; i < 8; i++) {
164 561015 const int level = block[n][s->idsp.idct_permutation[i]];
165 561015 block[n][s->idsp.idct_permutation[i]] = level - ac_val[i + 8];
166 561015 ac_val1[i] = block[n][s->idsp.idct_permutation[i << 3]];
167 561015 ac_val1[i + 8] = level;
168 }
169 } else {
170 /* different qscale, we must rescale */
171 ✗ for (i = 1; i < 8; i++) {
172 ✗ const int level = block[n][s->idsp.idct_permutation[i]];
173 ✗ block[n][s->idsp.idct_permutation[i]] = level - ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], s->qscale);
174 ✗ ac_val1[i] = block[n][s->idsp.idct_permutation[i << 3]];
175 ✗ ac_val1[i + 8] = level;
176 }
177 }
178 80145 st[n] = s->permutated_intra_h_scantable;
179 } else {
180 212499 const int xy = s->mb_x - 1 + s->mb_y * s->mb_stride;
181 /* left prediction */
182 212499 ac_val -= 16;
183
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 212499 if (s->mb_x == 0 || s->qscale == qscale_table[xy] || n == 1 || n == 3) {
184 /* same qscale */
185
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 1699992 for (i = 1; i < 8; i++) {
186 1487493 const int level = block[n][s->idsp.idct_permutation[i << 3]];
187 1487493 block[n][s->idsp.idct_permutation[i << 3]] = level - ac_val[i];
188 1487493 ac_val1[i] = level;
189 1487493 ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]];
190 }
191 } else {
192 /* different qscale, we must rescale */
193 ✗ for (i = 1; i < 8; i++) {
194 ✗ const int level = block[n][s->idsp.idct_permutation[i << 3]];
195 ✗ block[n][s->idsp.idct_permutation[i << 3]] = level - ROUNDED_DIV(ac_val[i] * qscale_table[xy], s->qscale);
196 ✗ ac_val1[i] = level;
197 ✗ ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]];
198 }
199 }
200 212499 st[n] = s->permutated_intra_v_scantable;
201 }
202
203
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 12538840 for (i = 63; i > 0; i--) // FIXME optimize
204
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 12470313 if (block[n][st[n][i]])
205 224117 break;
206 292644 s->block_last_index[n] = i;
207
208 292644 score += get_block_rate(s, block[n], s->block_last_index[n], st[n]);
209 }
210
211
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 48774 if (score < 0) {
212 7332 return 1;
213 } else {
214 41442 restore_ac_coeffs(s, block, dir, st, zigzag_last_index);
215 41442 return 0;
216 }
217 }
218
219 /**
220 * modify mb_type & qscale so that encoding is actually possible in MPEG-4
221 */
222 400 void ff_clean_mpeg4_qscales(MpegEncContext *s)
223 {
224 int i;
225 400 int8_t *const qscale_table = s->current_picture.qscale_table;
226
227 400 ff_clean_h263_qscales(s);
228
229
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 400 if (s->pict_type == AV_PICTURE_TYPE_B) {
230 256 int odd = 0;
231 /* ok, come on, this isn't funny anymore, there's more code for
232 * handling this MPEG-4 mess than for the actual adaptive quantization */
233
234
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 76864 for (i = 0; i < s->mb_num; i++) {
235 76608 int mb_xy = s->mb_index2xy[i];
236 76608 odd += qscale_table[mb_xy] & 1;
237 }
238
239
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 256 if (2 * odd > s->mb_num)
240 139 odd = 1;
241 else
242 117 odd = 0;
243
244
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 76864 for (i = 0; i < s->mb_num; i++) {
245 76608 int mb_xy = s->mb_index2xy[i];
246
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 76608 if ((qscale_table[mb_xy] & 1) != odd)
247 13058 qscale_table[mb_xy]++;
248
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 76608 if (qscale_table[mb_xy] > 31)
249 ✗ qscale_table[mb_xy] = 31;
250 }
251
252
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 76608 for (i = 1; i < s->mb_num; i++) {
253 76352 int mb_xy = s->mb_index2xy[i];
254
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 76352 if (qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i - 1]] &&
255
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 15223 (s->mb_type[mb_xy] & CANDIDATE_MB_TYPE_DIRECT)) {
256 15218 s->mb_type[mb_xy] |= CANDIDATE_MB_TYPE_BIDIR;
257 }
258 }
259 }
260 400 }
261
262 /**
263 * Encode the dc value.
264 * @param n block index (0-3 are luma, 4-5 are chroma)
265 */
266 1244892 static inline void mpeg4_encode_dc(PutBitContext *s, int level, int n)
267 {
268 /* DC will overflow if level is outside the [-255,255] range. */
269 1244892 level += 256;
270
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 1244892 if (n < 4) {
271 /* luminance */
272 829928 put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]);
273 } else {
274 /* chrominance */
275 414964 put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]);
276 }
277 1244892 }
278
279 ✗ static inline int mpeg4_get_dc_length(int level, int n)
280 {
281 ✗ if (n < 4)
282 ✗ return uni_DCtab_lum_len[level + 256];
283 else
284 ✗ return uni_DCtab_chrom_len[level + 256];
285 }
286
287 /**
288 * Encode an 8x8 block.
289 * @param n block index (0-3 are luma, 4-5 are chroma)
290 */
291 10342158 static inline void mpeg4_encode_block(MpegEncContext *s,
292 int16_t *block, int n, int intra_dc,
293 uint8_t *scan_table, PutBitContext *dc_pb,
294 PutBitContext *ac_pb)
295 {
296 int i, last_non_zero;
297 uint32_t *bits_tab;
298 uint8_t *len_tab;
299 10342158 const int last_index = s->block_last_index[n];
300
301
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 10342158 if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away
302 /* MPEG-4 based DC predictor */
303 1244892 mpeg4_encode_dc(dc_pb, intra_dc, n);
304
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 1244892 if (last_index < 1)
305 282108 return;
306 962784 i = 1;
307 962784 bits_tab = uni_mpeg4_intra_rl_bits;
308 962784 len_tab = uni_mpeg4_intra_rl_len;
309 } else {
310
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 9097266 if (last_index < 0)
311 5249690 return;
312 3847576 i = 0;
313 3847576 bits_tab = uni_mpeg4_inter_rl_bits;
314 3847576 len_tab = uni_mpeg4_inter_rl_len;
315 }
316
317 /* AC coefs */
318 4810360 last_non_zero = i - 1;
319
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 135208786 for (; i < last_index; i++) {
320 130398426 int level = block[scan_table[i]];
321
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 130398426 if (level) {
322 42355323 int run = i - last_non_zero - 1;
323 42355323 level += 64;
324
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 42355323 if ((level & (~127)) == 0) {
325 42337365 const int index = UNI_MPEG4_ENC_INDEX(0, run, level);
326 42337365 put_bits(ac_pb, len_tab[index], bits_tab[index]);
327 } else { // ESC3
328 17958 put_bits(ac_pb,
329 7 + 2 + 1 + 6 + 1 + 12 + 1,
330 17958 (3 << 23) + (3 << 21) + (0 << 20) + (run << 14) +
331 17958 (1 << 13) + (((level - 64) & 0xfff) << 1) + 1);
332 }
333 42355323 last_non_zero = i;
334 }
335 }
336 /* if (i <= last_index) */ {
337 4810360 int level = block[scan_table[i]];
338 4810360 int run = i - last_non_zero - 1;
339 4810360 level += 64;
340
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 4810360 if ((level & (~127)) == 0) {
341 4809955 const int index = UNI_MPEG4_ENC_INDEX(1, run, level);
342 4809955 put_bits(ac_pb, len_tab[index], bits_tab[index]);
343 } else { // ESC3
344 405 put_bits(ac_pb,
345 7 + 2 + 1 + 6 + 1 + 12 + 1,
346 405 (3 << 23) + (3 << 21) + (1 << 20) + (run << 14) +
347 405 (1 << 13) + (((level - 64) & 0xfff) << 1) + 1);
348 }
349 }
350 }
351
352 ✗ static int mpeg4_get_block_length(MpegEncContext *s,
353 int16_t *block, int n,
354 int intra_dc, uint8_t *scan_table)
355 {
356 int i, last_non_zero;
357 uint8_t *len_tab;
358 ✗ const int last_index = s->block_last_index[n];
359 ✗ int len = 0;
360
361 ✗ if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away
362 /* MPEG-4 based DC predictor */
363 ✗ len += mpeg4_get_dc_length(intra_dc, n);
364 ✗ if (last_index < 1)
365 ✗ return len;
366 ✗ i = 1;
367 ✗ len_tab = uni_mpeg4_intra_rl_len;
368 } else {
369 ✗ if (last_index < 0)
370 ✗ return 0;
371 ✗ i = 0;
372 ✗ len_tab = uni_mpeg4_inter_rl_len;
373 }
374
375 /* AC coefs */
376 ✗ last_non_zero = i - 1;
377 ✗ for (; i < last_index; i++) {
378 ✗ int level = block[scan_table[i]];
379 ✗ if (level) {
380 ✗ int run = i - last_non_zero - 1;
381 ✗ level += 64;
382 ✗ if ((level & (~127)) == 0) {
383 ✗ const int index = UNI_MPEG4_ENC_INDEX(0, run, level);
384 ✗ len += len_tab[index];
385 } else { // ESC3
386 ✗ len += 7 + 2 + 1 + 6 + 1 + 12 + 1;
387 }
388 ✗ last_non_zero = i;
389 }
390 }
391 /* if (i <= last_index) */ {
392 ✗ int level = block[scan_table[i]];
393 ✗ int run = i - last_non_zero - 1;
394 ✗ level += 64;
395 ✗ if ((level & (~127)) == 0) {
396 ✗ const int index = UNI_MPEG4_ENC_INDEX(1, run, level);
397 ✗ len += len_tab[index];
398 } else { // ESC3
399 ✗ len += 7 + 2 + 1 + 6 + 1 + 12 + 1;
400 }
401 }
402
403 ✗ return len;
404 }
405
406 1723693 static inline void mpeg4_encode_blocks(MpegEncContext *s, int16_t block[6][64],
407 int intra_dc[6], uint8_t **scan_table,
408 PutBitContext *dc_pb,
409 PutBitContext *ac_pb)
410 {
411 int i;
412
413
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 1723693 if (scan_table) {
414
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 207482 if (s->avctx->flags2 & AV_CODEC_FLAG2_NO_OUTPUT) {
415 ✗ for (i = 0; i < 6; i++)
416 ✗ skip_put_bits(&s->pb,
417 ✗ mpeg4_get_block_length(s, block[i], i,
418 ✗ intra_dc[i], scan_table[i]));
419 } else {
420 /* encode each block */
421
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 1452374 for (i = 0; i < 6; i++)
422 1244892 mpeg4_encode_block(s, block[i], i,
423 1244892 intra_dc[i], scan_table[i], dc_pb, ac_pb);
424 }
425 } else {
426
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 1516211 if (s->avctx->flags2 & AV_CODEC_FLAG2_NO_OUTPUT) {
427 ✗ for (i = 0; i < 6; i++)
428 ✗ skip_put_bits(&s->pb,
429 ✗ mpeg4_get_block_length(s, block[i], i, 0,
430 ✗ s->intra_scantable.permutated));
431 } else {
432 /* encode each block */
433
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 10613477 for (i = 0; i < 6; i++)
434 9097266 mpeg4_encode_block(s, block[i], i, 0,
435 9097266 s->intra_scantable.permutated, dc_pb, ac_pb);
436 }
437 }
438 1723693 }
439
440 765899 static inline int get_b_cbp(MpegEncContext *s, int16_t block[6][64],
441 int motion_x, int motion_y, int mb_type)
442 {
443 765899 int cbp = 0, i;
444
445
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 765899 if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) {
446 ✗ int score = 0;
447 ✗ const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
448
449 ✗ for (i = 0; i < 6; i++) {
450 ✗ if (s->coded_score[i] < 0) {
451 ✗ score += s->coded_score[i];
452 ✗ cbp |= 1 << (5 - i);
453 }
454 }
455
456 ✗ if (cbp) {
457 ✗ int zero_score = -6;
458 ✗ if ((motion_x | motion_y | s->dquant | mb_type) == 0)
459 ✗ zero_score -= 4; // 2 * MV + mb_type + cbp bit
460
461 ✗ zero_score *= lambda;
462 ✗ if (zero_score <= score)
463 ✗ cbp = 0;
464 }
465
466 ✗ for (i = 0; i < 6; i++) {
467 ✗ if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i)) & 1) == 0) {
468 ✗ s->block_last_index[i] = -1;
469 ✗ s->bdsp.clear_block(s->block[i]);
470 }
471 }
472 } else {
473
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 5361293 for (i = 0; i < 6; i++) {
474
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 4595394 if (s->block_last_index[i] >= 0)
475 1588622 cbp |= 1 << (5 - i);
476 }
477 }
478 765899 return cbp;
479 }
480
481 // FIXME this is duplicated to h263.c
482 static const int dquant_code[5] = { 1, 0, 9, 2, 3 };
483
484 1790058 void ff_mpeg4_encode_mb(MpegEncContext *s, int16_t block[6][64],
485 int motion_x, int motion_y)
486 {
487 int cbpc, cbpy, pred_x, pred_y;
488
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 1790058 PutBitContext *const pb2 = s->data_partitioning ? &s->pb2 : &s->pb;
489
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 1790058 PutBitContext *const tex_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb;
490
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 1790058 PutBitContext *const dc_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb;
491
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 1790058 const int interleaved_stats = (s->avctx->flags & AV_CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0;
492
493
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 1790058 if (!s->mb_intra) {
494 int i, cbp;
495
496
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 1582576 if (s->pict_type == AV_PICTURE_TYPE_B) {
497 /* convert from mv_dir to type */
498 static const int mb_type_table[8] = { -1, 3, 2, 1, -1, -1, -1, 0 };
499 766015 int mb_type = mb_type_table[s->mv_dir];
500
501
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 766015 if (s->mb_x == 0) {
502
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 110412 for (i = 0; i < 2; i++)
503 73608 s->last_mv[i][0][0] =
504 73608 s->last_mv[i][0][1] =
505 73608 s->last_mv[i][1][0] =
506 73608 s->last_mv[i][1][1] = 0;
507 }
508
509 av_assert2(s->dquant >= -2 && s->dquant <= 2);
510 av_assert2((s->dquant & 1) == 0);
511 av_assert2(mb_type >= 0);
512
513 /* nothing to do if this MB was skipped in the next P-frame */
514
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 766015 if (s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]) { // FIXME avoid DCT & ...
515 116 s->skip_count++;
516 116 s->mv[0][0][0] =
517 116 s->mv[0][0][1] =
518 116 s->mv[1][0][0] =
519 116 s->mv[1][0][1] = 0;
520 116 s->mv_dir = MV_DIR_FORWARD; // doesn't matter
521 116 s->qscale -= s->dquant;
522 // s->mb_skipped = 1;
523
524 66365 return;
525 }
526
527 765899 cbp = get_b_cbp(s, block, motion_x, motion_y, mb_type);
528
529
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 765899 if ((cbp | motion_x | motion_y | mb_type) == 0) {
530 /* direct MB with MV={0,0} */
531 av_assert2(s->dquant == 0);
532
533 44649 put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */
534
535
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 44649 if (interleaved_stats) {
536 ✗ s->misc_bits++;
537 ✗ s->last_bits++;
538 }
539 44649 s->skip_count++;
540 44649 return;
541 }
542
543 721250 put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */
544 721250 put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ // FIXME merge
545 721250 put_bits(&s->pb, mb_type + 1, 1); // this table is so simple that we don't need it :)
546
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 721250 if (cbp)
547 478879 put_bits(&s->pb, 6, cbp);
548
549
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 721250 if (cbp && mb_type) {
550
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 332059 if (s->dquant)
551 42518 put_bits(&s->pb, 2, (s->dquant >> 2) + 3);
552 else
553 289541 put_bits(&s->pb, 1, 0);
554 } else
555 389191 s->qscale -= s->dquant;
556
557
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 721250 if (!s->progressive_sequence) {
558 ✗ if (cbp)
559 ✗ put_bits(&s->pb, 1, s->interlaced_dct);
560 ✗ if (mb_type) // not direct mode
561 ✗ put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD);
562 }
563
564
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 721250 if (interleaved_stats)
565 ✗ s->misc_bits += get_bits_diff(s);
566
567
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 721250 if (!mb_type) {
568 av_assert2(s->mv_dir & MV_DIRECT);
569 171600 ff_h263_encode_motion_vector(s, motion_x, motion_y, 1);
570 } else {
571 av_assert2(mb_type > 0 && mb_type < 4);
572
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 549650 if (s->mv_type != MV_TYPE_FIELD) {
573
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 549650 if (s->mv_dir & MV_DIR_FORWARD) {
574 372404 ff_h263_encode_motion_vector(s,
575 372404 s->mv[0][0][0] - s->last_mv[0][0][0],
576 372404 s->mv[0][0][1] - s->last_mv[0][0][1],
577 s->f_code);
578 372404 s->last_mv[0][0][0] =
579 372404 s->last_mv[0][1][0] = s->mv[0][0][0];
580 372404 s->last_mv[0][0][1] =
581 372404 s->last_mv[0][1][1] = s->mv[0][0][1];
582 }
583
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 549650 if (s->mv_dir & MV_DIR_BACKWARD) {
584 375859 ff_h263_encode_motion_vector(s,
585 375859 s->mv[1][0][0] - s->last_mv[1][0][0],
586 375859 s->mv[1][0][1] - s->last_mv[1][0][1],
587 s->b_code);
588 375859 s->last_mv[1][0][0] =
589 375859 s->last_mv[1][1][0] = s->mv[1][0][0];
590 375859 s->last_mv[1][0][1] =
591 375859 s->last_mv[1][1][1] = s->mv[1][0][1];
592 }
593 } else {
594 ✗ if (s->mv_dir & MV_DIR_FORWARD) {
595 ✗ put_bits(&s->pb, 1, s->field_select[0][0]);
596 ✗ put_bits(&s->pb, 1, s->field_select[0][1]);
597 }
598 ✗ if (s->mv_dir & MV_DIR_BACKWARD) {
599 ✗ put_bits(&s->pb, 1, s->field_select[1][0]);
600 ✗ put_bits(&s->pb, 1, s->field_select[1][1]);
601 }
602 ✗ if (s->mv_dir & MV_DIR_FORWARD) {
603 ✗ for (i = 0; i < 2; i++) {
604 ✗ ff_h263_encode_motion_vector(s,
605 ✗ s->mv[0][i][0] - s->last_mv[0][i][0],
606 ✗ s->mv[0][i][1] - s->last_mv[0][i][1] / 2,
607 s->f_code);
608 ✗ s->last_mv[0][i][0] = s->mv[0][i][0];
609 ✗ s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
610 }
611 }
612 ✗ if (s->mv_dir & MV_DIR_BACKWARD) {
613 ✗ for (i = 0; i < 2; i++) {
614 ✗ ff_h263_encode_motion_vector(s,
615 ✗ s->mv[1][i][0] - s->last_mv[1][i][0],
616 ✗ s->mv[1][i][1] - s->last_mv[1][i][1] / 2,
617 s->b_code);
618 ✗ s->last_mv[1][i][0] = s->mv[1][i][0];
619 ✗ s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
620 }
621 }
622 }
623 }
624
625
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 721250 if (interleaved_stats)
626 ✗ s->mv_bits += get_bits_diff(s);
627
628 721250 mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb);
629
630
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 721250 if (interleaved_stats)
631 ✗ s->p_tex_bits += get_bits_diff(s);
632 } else { /* s->pict_type==AV_PICTURE_TYPE_B */
633 816561 cbp = get_p_cbp(s, block, motion_x, motion_y);
634
635
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 816561 if ((cbp | motion_x | motion_y | s->dquant) == 0 &&
636
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 50297 s->mv_type == MV_TYPE_16X16) {
637 /* Check if the B-frames can skip it too, as we must skip it
638 * if we skip here why didn't they just compress
639 * the skip-mb bits instead of reusing them ?! */
640
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 21881 if (s->max_b_frames > 0) {
641 int i;
642 int x, y, offset;
643 const uint8_t *p_pic;
644
645 646 x = s->mb_x * 16;
646 646 y = s->mb_y * 16;
647
648 646 offset = x + y * s->linesize;
649 646 p_pic = s->new_picture->data[0] + offset;
650
651 646 s->mb_skipped = 1;
652
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 814 for (i = 0; i < s->max_b_frames; i++) {
653 const uint8_t *b_pic;
654 int diff;
655 730 Picture *pic = s->reordered_input_picture[i + 1];
656
657
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 730 if (!pic || pic->f->pict_type != AV_PICTURE_TYPE_B)
658 break;
659
660 449 b_pic = pic->f->data[0] + offset;
661
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 449 if (!pic->shared)
662 449 b_pic += INPLACE_OFFSET;
663
664
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 449 if (x + 16 > s->width || y + 16 > s->height) {
665 int x1, y1;
666 ✗ int xe = FFMIN(16, s->width - x);
667 ✗ int ye = FFMIN(16, s->height - y);
668 ✗ diff = 0;
669 ✗ for (y1 = 0; y1 < ye; y1++) {
670 ✗ for (x1 = 0; x1 < xe; x1++) {
671 ✗ diff += FFABS(p_pic[x1 + y1 * s->linesize] - b_pic[x1 + y1 * s->linesize]);
672 }
673 }
674 ✗ diff = diff * 256 / (xe * ye);
675 } else {
676 449 diff = s->mecc.sad[0](NULL, p_pic, b_pic, s->linesize, 16);
677 }
678
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 449 if (diff > s->qscale * 70) { // FIXME check that 70 is optimal
679 281 s->mb_skipped = 0;
680 281 break;
681 }
682 }
683 } else
684 21235 s->mb_skipped = 1;
685
686
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 21881 if (s->mb_skipped == 1) {
687 /* skip macroblock */
688 21600 put_bits(&s->pb, 1, 1);
689
690
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 21600 if (interleaved_stats) {
691 ✗ s->misc_bits++;
692 ✗ s->last_bits++;
693 }
694 21600 s->skip_count++;
695
696 21600 return;
697 }
698 }
699
700 794961 put_bits(&s->pb, 1, 0); /* mb coded */
701 794961 cbpc = cbp & 3;
702 794961 cbpy = cbp >> 2;
703 794961 cbpy ^= 0xf;
704
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 794961 if (s->mv_type == MV_TYPE_16X16) {
705
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 585806 if (s->dquant)
706 43372 cbpc += 8;
707 585806 put_bits(&s->pb,
708 585806 ff_h263_inter_MCBPC_bits[cbpc],
709 585806 ff_h263_inter_MCBPC_code[cbpc]);
710
711 585806 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
712
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 585806 if (s->dquant)
713 43372 put_bits(pb2, 2, dquant_code[s->dquant + 2]);
714
715
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 585806 if (!s->progressive_sequence) {
716 ✗ if (cbp)
717 ✗ put_bits(pb2, 1, s->interlaced_dct);
718 ✗ put_bits(pb2, 1, 0);
719 }
720
721
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 585806 if (interleaved_stats)
722 ✗ s->misc_bits += get_bits_diff(s);
723
724 /* motion vectors: 16x16 mode */
725 585806 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
726
727 585806 ff_h263_encode_motion_vector(s,
728 motion_x - pred_x,
729 motion_y - pred_y,
730 s->f_code);
731
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 209155 } else if (s->mv_type == MV_TYPE_FIELD) {
732 ✗ if (s->dquant)
733 ✗ cbpc += 8;
734 ✗ put_bits(&s->pb,
735 ✗ ff_h263_inter_MCBPC_bits[cbpc],
736 ✗ ff_h263_inter_MCBPC_code[cbpc]);
737
738 ✗ put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
739 ✗ if (s->dquant)
740 ✗ put_bits(pb2, 2, dquant_code[s->dquant + 2]);
741
742 av_assert2(!s->progressive_sequence);
743 ✗ if (cbp)
744 ✗ put_bits(pb2, 1, s->interlaced_dct);
745 ✗ put_bits(pb2, 1, 1);
746
747 ✗ if (interleaved_stats)
748 ✗ s->misc_bits += get_bits_diff(s);
749
750 /* motion vectors: 16x8 interlaced mode */
751 ✗ ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
752 ✗ pred_y /= 2;
753
754 ✗ put_bits(&s->pb, 1, s->field_select[0][0]);
755 ✗ put_bits(&s->pb, 1, s->field_select[0][1]);
756
757 ✗ ff_h263_encode_motion_vector(s,
758 ✗ s->mv[0][0][0] - pred_x,
759 ✗ s->mv[0][0][1] - pred_y,
760 s->f_code);
761 ✗ ff_h263_encode_motion_vector(s,
762 ✗ s->mv[0][1][0] - pred_x,
763 ✗ s->mv[0][1][1] - pred_y,
764 s->f_code);
765 } else {
766 av_assert2(s->mv_type == MV_TYPE_8X8);
767 209155 put_bits(&s->pb,
768 209155 ff_h263_inter_MCBPC_bits[cbpc + 16],
769 209155 ff_h263_inter_MCBPC_code[cbpc + 16]);
770 209155 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
771
772
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 209155 if (!s->progressive_sequence && cbp)
773 ✗ put_bits(pb2, 1, s->interlaced_dct);
774
775
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 209155 if (interleaved_stats)
776 ✗ s->misc_bits += get_bits_diff(s);
777
778
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 1045775 for (i = 0; i < 4; i++) {
779 /* motion vectors: 8x8 mode*/
780 836620 ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
781
782 836620 ff_h263_encode_motion_vector(s,
783 836620 s->current_picture.motion_val[0][s->block_index[i]][0] - pred_x,
784 836620 s->current_picture.motion_val[0][s->block_index[i]][1] - pred_y,
785 s->f_code);
786 }
787 }
788
789
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 794961 if (interleaved_stats)
790 ✗ s->mv_bits += get_bits_diff(s);
791
792 794961 mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb);
793
794
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 794961 if (interleaved_stats)
795 ✗ s->p_tex_bits += get_bits_diff(s);
796 }
797 } else {
798 int cbp;
799 int dc_diff[6]; // dc values with the dc prediction subtracted
800 int dir[6]; // prediction direction
801 int zigzag_last_index[6];
802 uint8_t *scan_table[6];
803 int i;
804
805
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 1452374 for (i = 0; i < 6; i++)
806 1244892 dc_diff[i] = ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1);
807
808
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 207482 if (s->avctx->flags & AV_CODEC_FLAG_AC_PRED) {
809 48774 s->ac_pred = decide_ac_pred(s, block, dir, scan_table, zigzag_last_index);
810 } else {
811
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 1110956 for (i = 0; i < 6; i++)
812 952248 scan_table[i] = s->intra_scantable.permutated;
813 }
814
815 /* compute cbp */
816 207482 cbp = 0;
817
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 1452374 for (i = 0; i < 6; i++)
818
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 1244892 if (s->block_last_index[i] >= 1)
819 962784 cbp |= 1 << (5 - i);
820
821 207482 cbpc = cbp & 3;
822
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 207482 if (s->pict_type == AV_PICTURE_TYPE_I) {
823
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 110346 if (s->dquant)
824 26004 cbpc += 4;
825 110346 put_bits(&s->pb,
826 110346 ff_h263_intra_MCBPC_bits[cbpc],
827 110346 ff_h263_intra_MCBPC_code[cbpc]);
828 } else {
829
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 97136 if (s->dquant)
830 5661 cbpc += 8;
831 97136 put_bits(&s->pb, 1, 0); /* mb coded */
832 97136 put_bits(&s->pb,
833 97136 ff_h263_inter_MCBPC_bits[cbpc + 4],
834 97136 ff_h263_inter_MCBPC_code[cbpc + 4]);
835 }
836 207482 put_bits(pb2, 1, s->ac_pred);
837 207482 cbpy = cbp >> 2;
838 207482 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
839
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 207482 if (s->dquant)
840 31665 put_bits(dc_pb, 2, dquant_code[s->dquant + 2]);
841
842
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 207482 if (!s->progressive_sequence)
843 ✗ put_bits(dc_pb, 1, s->interlaced_dct);
844
845
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 207482 if (interleaved_stats)
846 ✗ s->misc_bits += get_bits_diff(s);
847
848 207482 mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb);
849
850
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 207482 if (interleaved_stats)
851 ✗ s->i_tex_bits += get_bits_diff(s);
852 207482 s->i_count++;
853
854 /* restore ac coeffs & last_index stuff
855 * if we messed them up with the prediction */
856
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 207482 if (s->ac_pred)
857 7332 restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index);
858 }
859 }
860
861 /**
862 * add MPEG-4 stuffing bits (01...1)
863 */
864 6616 void ff_mpeg4_stuffing(PutBitContext *pbc)
865 {
866 int length;
867 6616 put_bits(pbc, 1, 0);
868 6616 length = (-put_bits_count(pbc)) & 7;
869
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 6616 if (length)
870 5937 put_bits(pbc, length, (1 << length) - 1);
871 6616 }
872
873 /* must be called before writing the header */
874 2590 void ff_set_mpeg4_time(MpegEncContext *s)
875 {
876
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 2590 if (s->pict_type == AV_PICTURE_TYPE_B) {
877 640 ff_mpeg4_init_direct_mv(s);
878 } else {
879 1950 s->last_time_base = s->time_base;
880
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 1950 s->time_base = FFUDIV(s->time, s->avctx->time_base.den);
881 }
882 2590 }
883
884 265 static void mpeg4_encode_gop_header(MpegEncContext *s)
885 {
886 int64_t hours, minutes, seconds;
887 int64_t time;
888
889 265 put_bits(&s->pb, 16, 0);
890 265 put_bits(&s->pb, 16, GOP_STARTCODE);
891
892 265 time = s->current_picture_ptr->f->pts;
893
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 265 if (s->reordered_input_picture[1])
894 81 time = FFMIN(time, s->reordered_input_picture[1]->f->pts);
895 265 time = time * s->avctx->time_base.num;
896
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 265 s->last_time_base = FFUDIV(time, s->avctx->time_base.den);
897
898
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 265 seconds = FFUDIV(time, s->avctx->time_base.den);
899
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 265 minutes = FFUDIV(seconds, 60); seconds = FFUMOD(seconds, 60);
900
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 265 hours = FFUDIV(minutes, 60); minutes = FFUMOD(minutes, 60);
901
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 265 hours = FFUMOD(hours , 24);
902
903 265 put_bits(&s->pb, 5, hours);
904 265 put_bits(&s->pb, 6, minutes);
905 265 put_bits(&s->pb, 1, 1);
906 265 put_bits(&s->pb, 6, seconds);
907
908 265 put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP));
909 265 put_bits(&s->pb, 1, 0); // broken link == NO
910
911 265 ff_mpeg4_stuffing(&s->pb);
912 265 }
913
914 219 static void mpeg4_encode_visual_object_header(MpegEncContext *s)
915 {
916 int profile_and_level_indication;
917 int vo_ver_id;
918
919
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 219 if (s->avctx->profile != AV_PROFILE_UNKNOWN) {
920 ✗ profile_and_level_indication = s->avctx->profile << 4;
921
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 219 } else if (s->max_b_frames || s->quarter_sample) {
922 101 profile_and_level_indication = 0xF0; // adv simple
923 } else {
924 118 profile_and_level_indication = 0x00; // simple
925 }
926
927
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 219 if (s->avctx->level != AV_LEVEL_UNKNOWN)
928 ✗ profile_and_level_indication |= s->avctx->level;
929 else
930 219 profile_and_level_indication |= 1; // level 1
931
932
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 219 if (profile_and_level_indication >> 4 == 0xF)
933 101 vo_ver_id = 5;
934 else
935 118 vo_ver_id = 1;
936
937 // FIXME levels
938
939 219 put_bits(&s->pb, 16, 0);
940 219 put_bits(&s->pb, 16, VOS_STARTCODE);
941
942 219 put_bits(&s->pb, 8, profile_and_level_indication);
943
944 219 put_bits(&s->pb, 16, 0);
945 219 put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE);
946
947 219 put_bits(&s->pb, 1, 1);
948 219 put_bits(&s->pb, 4, vo_ver_id);
949 219 put_bits(&s->pb, 3, 1); // priority
950
951 219 put_bits(&s->pb, 4, 1); // visual obj type== video obj
952
953 219 put_bits(&s->pb, 1, 0); // video signal type == no clue // FIXME
954
955 219 ff_mpeg4_stuffing(&s->pb);
956 219 }
957
958 219 static void mpeg4_encode_vol_header(MpegEncContext *s,
959 int vo_number,
960 int vol_number)
961 {
962 int vo_ver_id, vo_type, aspect_ratio_info;
963
964
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 219 if (s->max_b_frames || s->quarter_sample) {
965 101 vo_ver_id = 5;
966 101 vo_type = ADV_SIMPLE_VO_TYPE;
967 } else {
968 118 vo_ver_id = 1;
969 118 vo_type = SIMPLE_VO_TYPE;
970 }
971
972 219 put_bits(&s->pb, 16, 0);
973 219 put_bits(&s->pb, 16, 0x100 + vo_number); /* video obj */
974 219 put_bits(&s->pb, 16, 0);
975 219 put_bits(&s->pb, 16, 0x120 + vol_number); /* video obj layer */
976
977 219 put_bits(&s->pb, 1, 0); /* random access vol */
978 219 put_bits(&s->pb, 8, vo_type); /* video obj type indication */
979
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 219 if (s->workaround_bugs & FF_BUG_MS) {
980 ✗ put_bits(&s->pb, 1, 0); /* is obj layer id= no */
981 } else {
982 219 put_bits(&s->pb, 1, 1); /* is obj layer id= yes */
983 219 put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */
984 219 put_bits(&s->pb, 3, 1); /* is obj layer priority */
985 }
986
987 219 aspect_ratio_info = ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio);
988
989 219 put_bits(&s->pb, 4, aspect_ratio_info); /* aspect ratio info */
990
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 219 if (aspect_ratio_info == FF_ASPECT_EXTENDED) {
991 ✗ av_reduce(&s->avctx->sample_aspect_ratio.num, &s->avctx->sample_aspect_ratio.den,
992 ✗ s->avctx->sample_aspect_ratio.num, s->avctx->sample_aspect_ratio.den, 255);
993 ✗ put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num);
994 ✗ put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den);
995 }
996
997
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 219 if (s->workaround_bugs & FF_BUG_MS) {
998 ✗ put_bits(&s->pb, 1, 0); /* vol control parameters= no @@@ */
999 } else {
1000 219 put_bits(&s->pb, 1, 1); /* vol control parameters= yes */
1001 219 put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */
1002 219 put_bits(&s->pb, 1, s->low_delay);
1003 219 put_bits(&s->pb, 1, 0); /* vbv parameters= no */
1004 }
1005
1006 219 put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */
1007 219 put_bits(&s->pb, 1, 1); /* marker bit */
1008
1009 219 put_bits(&s->pb, 16, s->avctx->time_base.den);
1010
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 219 if (s->time_increment_bits < 1)
1011 ✗ s->time_increment_bits = 1;
1012 219 put_bits(&s->pb, 1, 1); /* marker bit */
1013 219 put_bits(&s->pb, 1, 0); /* fixed vop rate=no */
1014 219 put_bits(&s->pb, 1, 1); /* marker bit */
1015 219 put_bits(&s->pb, 13, s->width); /* vol width */
1016 219 put_bits(&s->pb, 1, 1); /* marker bit */
1017 219 put_bits(&s->pb, 13, s->height); /* vol height */
1018 219 put_bits(&s->pb, 1, 1); /* marker bit */
1019 219 put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1);
1020 219 put_bits(&s->pb, 1, 1); /* obmc disable */
1021
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 219 if (vo_ver_id == 1)
1022 118 put_bits(&s->pb, 1, 0); /* sprite enable */
1023 else
1024 101 put_bits(&s->pb, 2, 0); /* sprite enable */
1025
1026 219 put_bits(&s->pb, 1, 0); /* not 8 bit == false */
1027 219 put_bits(&s->pb, 1, s->mpeg_quant); /* quant type = (0 = H.263 style) */
1028
1029
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 219 if (s->mpeg_quant) {
1030 ✗ ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
1031 ✗ ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
1032 }
1033
1034
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 219 if (vo_ver_id != 1)
1035 101 put_bits(&s->pb, 1, s->quarter_sample);
1036 219 put_bits(&s->pb, 1, 1); /* complexity estimation disable */
1037 219 put_bits(&s->pb, 1, s->rtp_mode ? 0 : 1); /* resync marker disable */
1038 219 put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0);
1039
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 219 if (s->data_partitioning)
1040 60 put_bits(&s->pb, 1, 0); /* no rvlc */
1041
1042
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 219 if (vo_ver_id != 1) {
1043 101 put_bits(&s->pb, 1, 0); /* newpred */
1044 101 put_bits(&s->pb, 1, 0); /* reduced res vop */
1045 }
1046 219 put_bits(&s->pb, 1, 0); /* scalability */
1047
1048 219 ff_mpeg4_stuffing(&s->pb);
1049
1050 /* user data */
1051
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 219 if (!(s->avctx->flags & AV_CODEC_FLAG_BITEXACT)) {
1052 ✗ put_bits(&s->pb, 16, 0);
1053 ✗ put_bits(&s->pb, 16, 0x1B2); /* user_data */
1054 ✗ ff_put_string(&s->pb, LIBAVCODEC_IDENT, 0);
1055 }
1056 219 }
1057
1058 /* write MPEG-4 VOP header */
1059 2590 int ff_mpeg4_encode_picture_header(MpegEncContext *s)
1060 {
1061 uint64_t time_incr;
1062 int64_t time_div, time_mod;
1063
1064
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 2590 if (s->pict_type == AV_PICTURE_TYPE_I) {
1065
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 265 if (!(s->avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)) {
1066
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 201 if (s->avctx->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) // HACK, the reference sw is buggy
1067 201 mpeg4_encode_visual_object_header(s);
1068
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 201 if (s->avctx->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || s->picture_number == 0) // HACK, the reference sw is buggy
1069 201 mpeg4_encode_vol_header(s, 0, 0);
1070 }
1071
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 265 if (!(s->workaround_bugs & FF_BUG_MS))
1072 265 mpeg4_encode_gop_header(s);
1073 }
1074
1075
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 2590 s->partitioned_frame = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B;
1076
1077 2590 put_bits(&s->pb, 16, 0); /* vop header */
1078 2590 put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */
1079 2590 put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */
1080
1081
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 2590 time_div = FFUDIV(s->time, s->avctx->time_base.den);
1082
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 2590 time_mod = FFUMOD(s->time, s->avctx->time_base.den);
1083 2590 time_incr = time_div - s->last_time_base;
1084
1085 // This limits the frame duration to max 1 day
1086
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 2590 if (time_incr > 3600*24) {
1087 ✗ av_log(s->avctx, AV_LOG_ERROR, "time_incr %"PRIu64" too large\n", time_incr);
1088 ✗ return AVERROR(EINVAL);
1089 }
1090
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 2673 while (time_incr--)
1091 83 put_bits(&s->pb, 1, 1);
1092
1093 2590 put_bits(&s->pb, 1, 0);
1094
1095 2590 put_bits(&s->pb, 1, 1); /* marker */
1096 2590 put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */
1097 2590 put_bits(&s->pb, 1, 1); /* marker */
1098 2590 put_bits(&s->pb, 1, 1); /* vop coded */
1099
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 2590 if (s->pict_type == AV_PICTURE_TYPE_P) {
1100 1685 put_bits(&s->pb, 1, s->no_rounding); /* rounding type */
1101 }
1102 2590 put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */
1103
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 2590 if (!s->progressive_sequence) {
1104 ✗ put_bits(&s->pb, 1, !!(s->current_picture_ptr->f->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST));
1105 ✗ put_bits(&s->pb, 1, s->alternate_scan);
1106 }
1107 // FIXME sprite stuff
1108
1109 2590 put_bits(&s->pb, 5, s->qscale);
1110
1111
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 2590 if (s->pict_type != AV_PICTURE_TYPE_I)
1112 2325 put_bits(&s->pb, 3, s->f_code); /* fcode_for */
1113
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 2590 if (s->pict_type == AV_PICTURE_TYPE_B)
1114 640 put_bits(&s->pb, 3, s->b_code); /* fcode_back */
1115
1116 2590 return 0;
1117 }
1118
1119 60 static av_cold void init_uni_dc_tab(void)
1120 {
1121 int level, uni_code, uni_len;
1122
1123
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 30780 for (level = -256; level < 256; level++) {
1124 int size, v, l;
1125 /* find number of bits */
1126 30720 size = 0;
1127 30720 v = abs(level);
1128
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 246420 while (v) {
1129 215700 v >>= 1;
1130 215700 size++;
1131 }
1132
1133
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 30720 if (level < 0)
1134 15360 l = (-level) ^ ((1 << size) - 1);
1135 else
1136 15360 l = level;
1137
1138 /* luminance */
1139 30720 uni_code = ff_mpeg4_DCtab_lum[size][0];
1140 30720 uni_len = ff_mpeg4_DCtab_lum[size][1];
1141
1142
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 30720 if (size > 0) {
1143 30660 uni_code <<= size;
1144 30660 uni_code |= l;
1145 30660 uni_len += size;
1146
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 30660 if (size > 8) {
1147 60 uni_code <<= 1;
1148 60 uni_code |= 1;
1149 60 uni_len++;
1150 }
1151 }
1152 30720 uni_DCtab_lum_bits[level + 256] = uni_code;
1153 30720 uni_DCtab_lum_len[level + 256] = uni_len;
1154
1155 /* chrominance */
1156 30720 uni_code = ff_mpeg4_DCtab_chrom[size][0];
1157 30720 uni_len = ff_mpeg4_DCtab_chrom[size][1];
1158
1159
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 30720 if (size > 0) {
1160 30660 uni_code <<= size;
1161 30660 uni_code |= l;
1162 30660 uni_len += size;
1163
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 30660 if (size > 8) {
1164 60 uni_code <<= 1;
1165 60 uni_code |= 1;
1166 60 uni_len++;
1167 }
1168 }
1169 30720 uni_DCtab_chrom_bits[level + 256] = uni_code;
1170 30720 uni_DCtab_chrom_len[level + 256] = uni_len;
1171 }
1172 60 }
1173
1174 120 static av_cold void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab,
1175 uint8_t *len_tab)
1176 {
1177 int slevel, run, last;
1178
1179 av_assert0(MAX_LEVEL >= 64);
1180 av_assert0(MAX_RUN >= 63);
1181
1182
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 15480 for (slevel = -64; slevel < 64; slevel++) {
1183
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 15360 if (slevel == 0)
1184 120 continue;
1185
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 990600 for (run = 0; run < 64; run++) {
1186
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 2926080 for (last = 0; last <= 1; last++) {
1187 1950720 const int index = UNI_MPEG4_ENC_INDEX(last, run, slevel + 64);
1188 1950720 int level = slevel < 0 ? -slevel : slevel;
1189 1950720 int sign = slevel < 0 ? 1 : 0;
1190 int bits, len, code;
1191 int level1, run1;
1192
1193 1950720 len_tab[index] = 100;
1194
1195 /* ESC0 */
1196 1950720 code = get_rl_index(rl, last, run, level);
1197 1950720 bits = rl->table_vlc[code][0];
1198 1950720 len = rl->table_vlc[code][1];
1199 1950720 bits = bits * 2 + sign;
1200 1950720 len++;
1201
1202
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 1950720 if (code != rl->n && len < len_tab[index]) {
1203 24480 bits_tab[index] = bits;
1204 24480 len_tab[index] = len;
1205 }
1206 /* ESC1 */
1207 1950720 bits = rl->table_vlc[rl->n][0];
1208 1950720 len = rl->table_vlc[rl->n][1];
1209 1950720 bits = bits * 2;
1210 1950720 len++; // esc1
1211 1950720 level1 = level - rl->max_level[last][run];
1212
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 1950720 if (level1 > 0) {
1213 1926240 code = get_rl_index(rl, last, run, level1);
1214 1926240 bits <<= rl->table_vlc[code][1];
1215 1926240 len += rl->table_vlc[code][1];
1216 1926240 bits += rl->table_vlc[code][0];
1217 1926240 bits = bits * 2 + sign;
1218 1926240 len++;
1219
1220
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 1926240 if (code != rl->n && len < len_tab[index]) {
1221 24480 bits_tab[index] = bits;
1222 24480 len_tab[index] = len;
1223 }
1224 }
1225 /* ESC2 */
1226 1950720 bits = rl->table_vlc[rl->n][0];
1227 1950720 len = rl->table_vlc[rl->n][1];
1228 1950720 bits = bits * 4 + 2;
1229 1950720 len += 2; // esc2
1230 1950720 run1 = run - rl->max_run[last][level] - 1;
1231
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 1950720 if (run1 >= 0) {
1232 1901760 code = get_rl_index(rl, last, run1, level);
1233 1901760 bits <<= rl->table_vlc[code][1];
1234 1901760 len += rl->table_vlc[code][1];
1235 1901760 bits += rl->table_vlc[code][0];
1236 1901760 bits = bits * 2 + sign;
1237 1901760 len++;
1238
1239
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 1901760 if (code != rl->n && len < len_tab[index]) {
1240 14880 bits_tab[index] = bits;
1241 14880 len_tab[index] = len;
1242 }
1243 }
1244 /* ESC3 */
1245 1950720 bits = rl->table_vlc[rl->n][0];
1246 1950720 len = rl->table_vlc[rl->n][1];
1247 1950720 bits = bits * 4 + 3;
1248 1950720 len += 2; // esc3
1249 1950720 bits = bits * 2 + last;
1250 1950720 len++;
1251 1950720 bits = bits * 64 + run;
1252 1950720 len += 6;
1253 1950720 bits = bits * 2 + 1;
1254 1950720 len++; // marker
1255 1950720 bits = bits * 4096 + (slevel & 0xfff);
1256 1950720 len += 12;
1257 1950720 bits = bits * 2 + 1;
1258 1950720 len++; // marker
1259
1260
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 1950720 if (len < len_tab[index]) {
1261 1888440 bits_tab[index] = bits;
1262 1888440 len_tab[index] = len;
1263 }
1264 }
1265 }
1266 }
1267 120 }
1268
1269 60 static av_cold void mpeg4_encode_init_static(void)
1270 {
1271 60 init_uni_dc_tab();
1272
1273 60 ff_mpeg4_init_rl_intra();
1274
1275 60 init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
1276 60 init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
1277 60 }
1278
1279 60 static av_cold int encode_init(AVCodecContext *avctx)
1280 {
1281 static AVOnce init_static_once = AV_ONCE_INIT;
1282 60 MpegEncContext *s = avctx->priv_data;
1283 int ret;
1284
1285
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 60 if (avctx->width >= (1<<13) || avctx->height >= (1<<13)) {
1286 ✗ av_log(avctx, AV_LOG_ERROR, "dimensions too large for MPEG-4\n");
1287 ✗ return AVERROR(EINVAL);
1288 }
1289
1290 60 ff_qpeldsp_init(&s->qdsp);
1291
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 60 if ((ret = ff_mpv_encode_init(avctx)) < 0)
1292 ✗ return ret;
1293
1294 60 ff_thread_once(&init_static_once, mpeg4_encode_init_static);
1295
1296 60 s->min_qcoeff = -2048;
1297 60 s->max_qcoeff = 2047;
1298 60 s->intra_ac_vlc_length = uni_mpeg4_intra_rl_len;
1299 60 s->intra_ac_vlc_last_length = uni_mpeg4_intra_rl_len + 128 * 64;
1300 60 s->inter_ac_vlc_length = uni_mpeg4_inter_rl_len;
1301 60 s->inter_ac_vlc_last_length = uni_mpeg4_inter_rl_len + 128 * 64;
1302 60 s->luma_dc_vlc_length = uni_DCtab_lum_len;
1303 60 s->ac_esc_length = 7 + 2 + 1 + 6 + 1 + 12 + 1;
1304 60 s->y_dc_scale_table = ff_mpeg4_y_dc_scale_table;
1305 60 s->c_dc_scale_table = ff_mpeg4_c_dc_scale_table;
1306
1307
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 60 if (s->avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
1308 18 s->avctx->extradata = av_malloc(1024);
1309
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 18 if (!s->avctx->extradata)
1310 ✗ return AVERROR(ENOMEM);
1311 18 init_put_bits(&s->pb, s->avctx->extradata, 1024);
1312
1313
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 18 if (!(s->workaround_bugs & FF_BUG_MS))
1314 18 mpeg4_encode_visual_object_header(s);
1315 18 mpeg4_encode_vol_header(s, 0, 0);
1316
1317 // ff_mpeg4_stuffing(&s->pb); ?
1318 18 flush_put_bits(&s->pb);
1319 18 s->avctx->extradata_size = put_bytes_output(&s->pb);
1320 }
1321 60 return 0;
1322 }
1323
1324 1760 void ff_mpeg4_init_partitions(MpegEncContext *s)
1325 {
1326 1760 uint8_t *start = put_bits_ptr(&s->pb);
1327 1760 uint8_t *end = s->pb.buf_end;
1328 1760 int size = end - start;
1329 1760 int pb_size = (((intptr_t)start + size / 3) & (~3)) - (intptr_t)start;
1330 1760 int tex_size = (size - 2 * pb_size) & (~3);
1331
1332 1760 set_put_bits_buffer_size(&s->pb, pb_size);
1333 1760 init_put_bits(&s->tex_pb, start + pb_size, tex_size);
1334 1760 init_put_bits(&s->pb2, start + pb_size + tex_size, pb_size);
1335 1760 }
1336
1337 1760 void ff_mpeg4_merge_partitions(MpegEncContext *s)
1338 {
1339 1760 const int pb2_len = put_bits_count(&s->pb2);
1340 1760 const int tex_pb_len = put_bits_count(&s->tex_pb);
1341 1760 const int bits = put_bits_count(&s->pb);
1342
1343
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 1760 if (s->pict_type == AV_PICTURE_TYPE_I) {
1344 512 put_bits(&s->pb, 19, DC_MARKER);
1345 512 s->misc_bits += 19 + pb2_len + bits - s->last_bits;
1346 512 s->i_tex_bits += tex_pb_len;
1347 } else {
1348 1248 put_bits(&s->pb, 17, MOTION_MARKER);
1349 1248 s->misc_bits += 17 + pb2_len;
1350 1248 s->mv_bits += bits - s->last_bits;
1351 1248 s->p_tex_bits += tex_pb_len;
1352 }
1353
1354 1760 flush_put_bits(&s->pb2);
1355 1760 flush_put_bits(&s->tex_pb);
1356
1357 1760 set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf);
1358 1760 ff_copy_bits(&s->pb, s->pb2.buf, pb2_len);
1359 1760 ff_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len);
1360 1760 s->last_bits = put_bits_count(&s->pb);
1361 1760 }
1362
1363 3323 void ff_mpeg4_encode_video_packet_header(MpegEncContext *s)
1364 {
1365 3323 int mb_num_bits = av_log2(s->mb_num - 1) + 1;
1366
1367 3323 put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s), 0);
1368 3323 put_bits(&s->pb, 1, 1);
1369
1370 3323 put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y * s->mb_width);
1371 3323 put_bits(&s->pb, s->quant_precision, s->qscale);
1372 3323 put_bits(&s->pb, 1, 0); /* no HEC */
1373 3323 }
1374
1375 #define OFFSET(x) offsetof(MpegEncContext, x)
1376 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1377 static const AVOption options[] = {
1378 { "data_partitioning", "Use data partitioning.", OFFSET(data_partitioning), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1379 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1380 { "mpeg_quant", "Use MPEG quantizers instead of H.263",
1381 OFFSET(mpeg_quant), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, VE },
1382 FF_MPV_COMMON_BFRAME_OPTS
1383 FF_MPV_COMMON_OPTS
1384 FF_MPV_COMMON_MOTION_EST_OPTS
1385 FF_MPEG4_PROFILE_OPTS
1386 { NULL },
1387 };
1388
1389 static const AVClass mpeg4enc_class = {
1390 .class_name = "MPEG4 encoder",
1391 .item_name = av_default_item_name,
1392 .option = options,
1393 .version = LIBAVUTIL_VERSION_INT,
1394 };
1395
1396 const FFCodec ff_mpeg4_encoder = {
1397 .p.name = "mpeg4",
1398 CODEC_LONG_NAME("MPEG-4 part 2"),
1399 .p.type = AVMEDIA_TYPE_VIDEO,
1400 .p.id = AV_CODEC_ID_MPEG4,
1401 .priv_data_size = sizeof(MpegEncContext),
1402 .init = encode_init,
1403 FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
1404 .close = ff_mpv_encode_end,
1405 .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
1406 .p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS |
1407 AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
1408 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1409 .p.priv_class = &mpeg4enc_class,
1410 };
1411