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1 | /* |
2 | * DV encoder | |
3 | * Copyright (c) 2003 Roman Shaposhnik | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FFmpeg is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with FFmpeg; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | /** | |
23 | * @file | |
24 | * DV encoder | |
25 | */ | |
26 | ||
27 | #include "config.h" | |
28 | ||
29 | #include "libavutil/attributes.h" | |
30 | #include "libavutil/pixdesc.h" | |
31 | ||
32 | #include "avcodec.h" | |
33 | #include "dv.h" | |
34 | #include "dv_profile_internal.h" | |
35 | #include "dv_tablegen.h" | |
36 | #include "fdctdsp.h" | |
37 | #include "internal.h" | |
38 | #include "me_cmp.h" | |
39 | #include "pixblockdsp.h" | |
40 | #include "put_bits.h" | |
41 | ||
42 | static av_cold int dvvideo_encode_init(AVCodecContext *avctx) | |
43 | { | |
44 | DVVideoContext *s = avctx->priv_data; | |
45 | FDCTDSPContext fdsp; | |
46 | MECmpContext mecc; | |
47 | PixblockDSPContext pdsp; | |
48 | int ret; | |
49 | ||
50 | s->sys = av_dv_codec_profile(avctx->width, avctx->height, avctx->pix_fmt); | |
51 | if (!s->sys) { | |
52 | av_log(avctx, AV_LOG_ERROR, "Found no DV profile for %ix%i %s video. " | |
53 | "Valid DV profiles are:\n", | |
54 | avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt)); | |
55 | ff_dv_print_profiles(avctx, AV_LOG_ERROR); | |
56 | return AVERROR(EINVAL); | |
57 | } | |
58 | if (avctx->height > 576) { | |
59 | av_log(avctx, AV_LOG_ERROR, "DVCPRO HD encoding is not supported.\n"); | |
60 | return AVERROR_PATCHWELCOME; | |
61 | } | |
62 | ret = ff_dv_init_dynamic_tables(s, s->sys); | |
63 | if (ret < 0) { | |
64 | av_log(avctx, AV_LOG_ERROR, "Error initializing work tables.\n"); | |
65 | return ret; | |
66 | } | |
67 | ||
68 | avctx->coded_frame = av_frame_alloc(); | |
69 | if (!avctx->coded_frame) | |
70 | return AVERROR(ENOMEM); | |
71 | ||
72 | dv_vlc_map_tableinit(); | |
73 | ||
74 | memset(&fdsp,0, sizeof(fdsp)); | |
75 | memset(&mecc,0, sizeof(mecc)); | |
76 | memset(&pdsp,0, sizeof(pdsp)); | |
77 | ff_fdctdsp_init(&fdsp, avctx); | |
78 | ff_me_cmp_init(&mecc, avctx); | |
79 | ff_pixblockdsp_init(&pdsp, avctx); | |
80 | ff_set_cmp(&mecc, mecc.ildct_cmp, avctx->ildct_cmp); | |
81 | ||
82 | s->get_pixels = pdsp.get_pixels; | |
83 | s->ildct_cmp = mecc.ildct_cmp[5]; | |
84 | ||
85 | s->fdct[0] = fdsp.fdct; | |
86 | s->fdct[1] = fdsp.fdct248; | |
87 | ||
88 | return ff_dvvideo_init(avctx); | |
89 | } | |
90 | ||
91 | /* bit budget for AC only in 5 MBs */ | |
92 | static const int vs_total_ac_bits = (100 * 4 + 68 * 2) * 5; | |
93 | static const int mb_area_start[5] = { 1, 6, 21, 43, 64 }; | |
94 | ||
95 | #if CONFIG_SMALL | |
96 | /* Convert run and level (where level != 0) pair into VLC, returning bit size */ | |
97 | static av_always_inline int dv_rl2vlc(int run, int level, int sign, | |
98 | uint32_t *vlc) | |
99 | { | |
100 | int size; | |
101 | if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) { | |
102 | *vlc = dv_vlc_map[run][level].vlc | sign; | |
103 | size = dv_vlc_map[run][level].size; | |
104 | } else { | |
105 | if (level < DV_VLC_MAP_LEV_SIZE) { | |
106 | *vlc = dv_vlc_map[0][level].vlc | sign; | |
107 | size = dv_vlc_map[0][level].size; | |
108 | } else { | |
109 | *vlc = 0xfe00 | (level << 1) | sign; | |
110 | size = 16; | |
111 | } | |
112 | if (run) { | |
113 | *vlc |= ((run < 16) ? dv_vlc_map[run - 1][0].vlc : | |
114 | (0x1f80 | (run - 1))) << size; | |
115 | size += (run < 16) ? dv_vlc_map[run - 1][0].size : 13; | |
116 | } | |
117 | } | |
118 | ||
119 | return size; | |
120 | } | |
121 | ||
122 | static av_always_inline int dv_rl2vlc_size(int run, int level) | |
123 | { | |
124 | int size; | |
125 | ||
126 | if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) { | |
127 | size = dv_vlc_map[run][level].size; | |
128 | } else { | |
129 | size = (level < DV_VLC_MAP_LEV_SIZE) ? dv_vlc_map[0][level].size : 16; | |
130 | if (run) | |
131 | size += (run < 16) ? dv_vlc_map[run - 1][0].size : 13; | |
132 | } | |
133 | return size; | |
134 | } | |
135 | #else | |
136 | static av_always_inline int dv_rl2vlc(int run, int l, int sign, uint32_t *vlc) | |
137 | { | |
138 | *vlc = dv_vlc_map[run][l].vlc | sign; | |
139 | return dv_vlc_map[run][l].size; | |
140 | } | |
141 | ||
142 | static av_always_inline int dv_rl2vlc_size(int run, int l) | |
143 | { | |
144 | return dv_vlc_map[run][l].size; | |
145 | } | |
146 | #endif | |
147 | ||
148 | typedef struct EncBlockInfo { | |
149 | int area_q[4]; | |
150 | int bit_size[4]; | |
151 | int prev[5]; | |
152 | int cur_ac; | |
153 | int cno; | |
154 | int dct_mode; | |
155 | int16_t mb[64]; | |
156 | uint8_t next[64]; | |
157 | uint8_t sign[64]; | |
158 | uint8_t partial_bit_count; | |
159 | uint32_t partial_bit_buffer; /* we can't use uint16_t here */ | |
160 | } EncBlockInfo; | |
161 | ||
162 | static av_always_inline PutBitContext *dv_encode_ac(EncBlockInfo *bi, | |
163 | PutBitContext *pb_pool, | |
164 | PutBitContext *pb_end) | |
165 | { | |
166 | int prev, bits_left; | |
167 | PutBitContext *pb = pb_pool; | |
168 | int size = bi->partial_bit_count; | |
169 | uint32_t vlc = bi->partial_bit_buffer; | |
170 | ||
171 | bi->partial_bit_count = | |
172 | bi->partial_bit_buffer = 0; | |
173 | for (;;) { | |
174 | /* Find suitable storage space */ | |
175 | for (; size > (bits_left = put_bits_left(pb)); pb++) { | |
176 | if (bits_left) { | |
177 | size -= bits_left; | |
178 | put_bits(pb, bits_left, vlc >> size); | |
179 | vlc = vlc & ((1 << size) - 1); | |
180 | } | |
181 | if (pb + 1 >= pb_end) { | |
182 | bi->partial_bit_count = size; | |
183 | bi->partial_bit_buffer = vlc; | |
184 | return pb; | |
185 | } | |
186 | } | |
187 | ||
188 | /* Store VLC */ | |
189 | put_bits(pb, size, vlc); | |
190 | ||
191 | if (bi->cur_ac >= 64) | |
192 | break; | |
193 | ||
194 | /* Construct the next VLC */ | |
195 | prev = bi->cur_ac; | |
196 | bi->cur_ac = bi->next[prev]; | |
197 | if (bi->cur_ac < 64) { | |
198 | size = dv_rl2vlc(bi->cur_ac - prev - 1, bi->mb[bi->cur_ac], | |
199 | bi->sign[bi->cur_ac], &vlc); | |
200 | } else { | |
201 | size = 4; | |
202 | vlc = 6; /* End Of Block stamp */ | |
203 | } | |
204 | } | |
205 | return pb; | |
206 | } | |
207 | ||
208 | static av_always_inline int dv_guess_dct_mode(DVVideoContext *s, uint8_t *data, | |
209 | int linesize) | |
210 | { | |
211 | if (s->avctx->flags & CODEC_FLAG_INTERLACED_DCT) { | |
212 | int ps = s->ildct_cmp(NULL, data, NULL, linesize, 8) - 400; | |
213 | if (ps > 0) { | |
214 | int is = s->ildct_cmp(NULL, data, NULL, linesize << 1, 4) + | |
215 | s->ildct_cmp(NULL, data + linesize, NULL, linesize << 1, 4); | |
216 | return ps > is; | |
217 | } | |
218 | } | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
223 | static const int dv_weight_bits = 18; | |
224 | static const int dv_weight_88[64] = { | |
225 | 131072, 257107, 257107, 242189, 252167, 242189, 235923, 237536, | |
226 | 237536, 235923, 229376, 231390, 223754, 231390, 229376, 222935, | |
227 | 224969, 217965, 217965, 224969, 222935, 200636, 218652, 211916, | |
228 | 212325, 211916, 218652, 200636, 188995, 196781, 205965, 206433, | |
229 | 206433, 205965, 196781, 188995, 185364, 185364, 200636, 200704, | |
230 | 200636, 185364, 185364, 174609, 180568, 195068, 195068, 180568, | |
231 | 174609, 170091, 175557, 189591, 175557, 170091, 165371, 170627, | |
232 | 170627, 165371, 160727, 153560, 160727, 144651, 144651, 136258, | |
233 | }; | |
234 | static const int dv_weight_248[64] = { | |
235 | 131072, 242189, 257107, 237536, 229376, 200636, 242189, 223754, | |
236 | 224969, 196781, 262144, 242189, 229376, 200636, 257107, 237536, | |
237 | 211916, 185364, 235923, 217965, 229376, 211916, 206433, 180568, | |
238 | 242189, 223754, 224969, 196781, 211916, 185364, 235923, 217965, | |
239 | 200704, 175557, 222935, 205965, 200636, 185364, 195068, 170627, | |
240 | 229376, 211916, 206433, 180568, 200704, 175557, 222935, 205965, | |
241 | 175557, 153560, 188995, 174609, 165371, 144651, 200636, 185364, | |
242 | 195068, 170627, 175557, 153560, 188995, 174609, 165371, 144651, | |
243 | }; | |
244 | ||
245 | static av_always_inline int dv_init_enc_block(EncBlockInfo *bi, uint8_t *data, | |
246 | int linesize, DVVideoContext *s, | |
247 | int bias) | |
248 | { | |
249 | const int *weight; | |
250 | const uint8_t *zigzag_scan; | |
251 | LOCAL_ALIGNED_16(int16_t, blk, [64]); | |
252 | int i, area; | |
253 | /* We offer two different methods for class number assignment: the | |
254 | * method suggested in SMPTE 314M Table 22, and an improved | |
255 | * method. The SMPTE method is very conservative; it assigns class | |
256 | * 3 (i.e. severe quantization) to any block where the largest AC | |
257 | * component is greater than 36. FFmpeg's DV encoder tracks AC bit | |
258 | * consumption precisely, so there is no need to bias most blocks | |
259 | * towards strongly lossy compression. Instead, we assign class 2 | |
260 | * to most blocks, and use class 3 only when strictly necessary | |
261 | * (for blocks whose largest AC component exceeds 255). */ | |
262 | ||
263 | #if 0 /* SMPTE spec method */ | |
264 | static const int classes[] = { 12, 24, 36, 0xffff }; | |
265 | #else /* improved FFmpeg method */ | |
266 | static const int classes[] = { -1, -1, 255, 0xffff }; | |
267 | #endif | |
268 | int max = classes[0]; | |
269 | int prev = 0; | |
270 | ||
271 | av_assert2((((int) blk) & 15) == 0); | |
272 | ||
273 | bi->area_q[0] = | |
274 | bi->area_q[1] = | |
275 | bi->area_q[2] = | |
276 | bi->area_q[3] = 0; | |
277 | bi->partial_bit_count = 0; | |
278 | bi->partial_bit_buffer = 0; | |
279 | bi->cur_ac = 0; | |
280 | if (data) { | |
281 | bi->dct_mode = dv_guess_dct_mode(s, data, linesize); | |
282 | s->get_pixels(blk, data, linesize); | |
283 | s->fdct[bi->dct_mode](blk); | |
284 | } else { | |
285 | /* We rely on the fact that encoding all zeros leads to an immediate | |
286 | * EOB, which is precisely what the spec calls for in the "dummy" | |
287 | * blocks. */ | |
288 | memset(blk, 0, 64 * sizeof(*blk)); | |
289 | bi->dct_mode = 0; | |
290 | } | |
291 | bi->mb[0] = blk[0]; | |
292 | ||
293 | zigzag_scan = bi->dct_mode ? ff_dv_zigzag248_direct : ff_zigzag_direct; | |
294 | weight = bi->dct_mode ? dv_weight_248 : dv_weight_88; | |
295 | ||
296 | for (area = 0; area < 4; area++) { | |
297 | bi->prev[area] = prev; | |
298 | bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :) | |
299 | for (i = mb_area_start[area]; i < mb_area_start[area + 1]; i++) { | |
300 | int level = blk[zigzag_scan[i]]; | |
301 | ||
302 | if (level + 15 > 30U) { | |
303 | bi->sign[i] = (level >> 31) & 1; | |
304 | /* Weight it and shift down into range, adding for rounding. | |
305 | * The extra division by a factor of 2^4 reverses the 8x | |
306 | * expansion of the DCT AND the 2x doubling of the weights. */ | |
307 | level = (FFABS(level) * weight[i] + (1 << (dv_weight_bits + 3))) >> | |
308 | (dv_weight_bits + 4); | |
309 | bi->mb[i] = level; | |
310 | if (level > max) | |
311 | max = level; | |
312 | bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, level); | |
313 | bi->next[prev] = i; | |
314 | prev = i; | |
315 | } | |
316 | } | |
317 | } | |
318 | bi->next[prev] = i; | |
319 | for (bi->cno = 0; max > classes[bi->cno]; bi->cno++) | |
320 | ; | |
321 | ||
322 | bi->cno += bias; | |
323 | ||
324 | if (bi->cno >= 3) { | |
325 | bi->cno = 3; | |
326 | prev = 0; | |
327 | i = bi->next[prev]; | |
328 | for (area = 0; area < 4; area++) { | |
329 | bi->prev[area] = prev; | |
330 | bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :) | |
331 | for (; i < mb_area_start[area + 1]; i = bi->next[i]) { | |
332 | bi->mb[i] >>= 1; | |
333 | ||
334 | if (bi->mb[i]) { | |
335 | bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, bi->mb[i]); | |
336 | bi->next[prev] = i; | |
337 | prev = i; | |
338 | } | |
339 | } | |
340 | } | |
341 | bi->next[prev] = i; | |
342 | } | |
343 | ||
344 | return bi->bit_size[0] + bi->bit_size[1] + | |
345 | bi->bit_size[2] + bi->bit_size[3]; | |
346 | } | |
347 | ||
348 | static inline void dv_guess_qnos(EncBlockInfo *blks, int *qnos) | |
349 | { | |
350 | int size[5]; | |
351 | int i, j, k, a, prev, a2; | |
352 | EncBlockInfo *b; | |
353 | ||
354 | size[0] = | |
355 | size[1] = | |
356 | size[2] = | |
357 | size[3] = | |
358 | size[4] = 1 << 24; | |
359 | do { | |
360 | b = blks; | |
361 | for (i = 0; i < 5; i++) { | |
362 | if (!qnos[i]) | |
363 | continue; | |
364 | ||
365 | qnos[i]--; | |
366 | size[i] = 0; | |
367 | for (j = 0; j < 6; j++, b++) { | |
368 | for (a = 0; a < 4; a++) { | |
369 | if (b->area_q[a] != ff_dv_quant_shifts[qnos[i] + ff_dv_quant_offset[b->cno]][a]) { | |
370 | b->bit_size[a] = 1; // 4 areas 4 bits for EOB :) | |
371 | b->area_q[a]++; | |
372 | prev = b->prev[a]; | |
373 | av_assert2(b->next[prev] >= mb_area_start[a + 1] || b->mb[prev]); | |
374 | for (k = b->next[prev]; k < mb_area_start[a + 1]; k = b->next[k]) { | |
375 | b->mb[k] >>= 1; | |
376 | if (b->mb[k]) { | |
377 | b->bit_size[a] += dv_rl2vlc_size(k - prev - 1, b->mb[k]); | |
378 | prev = k; | |
379 | } else { | |
380 | if (b->next[k] >= mb_area_start[a + 1] && b->next[k] < 64) { | |
381 | for (a2 = a + 1; b->next[k] >= mb_area_start[a2 + 1]; a2++) | |
382 | b->prev[a2] = prev; | |
383 | av_assert2(a2 < 4); | |
384 | av_assert2(b->mb[b->next[k]]); | |
385 | b->bit_size[a2] += dv_rl2vlc_size(b->next[k] - prev - 1, b->mb[b->next[k]]) - | |
386 | dv_rl2vlc_size(b->next[k] - k - 1, b->mb[b->next[k]]); | |
387 | av_assert2(b->prev[a2] == k && (a2 + 1 >= 4 || b->prev[a2 + 1] != k)); | |
388 | b->prev[a2] = prev; | |
389 | } | |
390 | b->next[prev] = b->next[k]; | |
391 | } | |
392 | } | |
393 | b->prev[a + 1] = prev; | |
394 | } | |
395 | size[i] += b->bit_size[a]; | |
396 | } | |
397 | } | |
398 | if (vs_total_ac_bits >= size[0] + size[1] + size[2] + size[3] + size[4]) | |
399 | return; | |
400 | } | |
401 | } while (qnos[0] | qnos[1] | qnos[2] | qnos[3] | qnos[4]); | |
402 | ||
403 | for (a = 2; a == 2 || vs_total_ac_bits < size[0]; a += a) { | |
404 | b = blks; | |
405 | size[0] = 5 * 6 * 4; // EOB | |
406 | for (j = 0; j < 6 * 5; j++, b++) { | |
407 | prev = b->prev[0]; | |
408 | for (k = b->next[prev]; k < 64; k = b->next[k]) { | |
409 | if (b->mb[k] < a && b->mb[k] > -a) { | |
410 | b->next[prev] = b->next[k]; | |
411 | } else { | |
412 | size[0] += dv_rl2vlc_size(k - prev - 1, b->mb[k]); | |
413 | prev = k; | |
414 | } | |
415 | } | |
416 | } | |
417 | } | |
418 | } | |
419 | ||
420 | static int dv_encode_video_segment(AVCodecContext *avctx, void *arg) | |
421 | { | |
422 | DVVideoContext *s = avctx->priv_data; | |
423 | DVwork_chunk *work_chunk = arg; | |
424 | int mb_index, i, j; | |
425 | int mb_x, mb_y, c_offset, linesize, y_stride; | |
426 | uint8_t *y_ptr; | |
427 | uint8_t *dif; | |
428 | LOCAL_ALIGNED_8(uint8_t, scratch, [128]); | |
429 | EncBlockInfo enc_blks[5 * DV_MAX_BPM]; | |
430 | PutBitContext pbs[5 * DV_MAX_BPM]; | |
431 | PutBitContext *pb; | |
432 | EncBlockInfo *enc_blk; | |
433 | int vs_bit_size = 0; | |
434 | int qnos[5] = { 15, 15, 15, 15, 15 }; /* No quantization */ | |
435 | int *qnosp = &qnos[0]; | |
436 | ||
437 | dif = &s->buf[work_chunk->buf_offset * 80]; | |
438 | enc_blk = &enc_blks[0]; | |
439 | for (mb_index = 0; mb_index < 5; mb_index++) { | |
440 | dv_calculate_mb_xy(s, work_chunk, mb_index, &mb_x, &mb_y); | |
441 | ||
442 | /* initializing luminance blocks */ | |
443 | if ((s->sys->pix_fmt == AV_PIX_FMT_YUV420P) || | |
444 | (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) || | |
445 | (s->sys->height >= 720 && mb_y != 134)) { | |
446 | y_stride = s->frame->linesize[0] << 3; | |
447 | } else { | |
448 | y_stride = 16; | |
449 | } | |
450 | y_ptr = s->frame->data[0] + | |
451 | ((mb_y * s->frame->linesize[0] + mb_x) << 3); | |
452 | linesize = s->frame->linesize[0]; | |
453 | ||
454 | if (s->sys->video_stype == 4) { /* SD 422 */ | |
455 | vs_bit_size += | |
456 | dv_init_enc_block(enc_blk + 0, y_ptr, linesize, s, 0) + | |
457 | dv_init_enc_block(enc_blk + 1, NULL, linesize, s, 0) + | |
458 | dv_init_enc_block(enc_blk + 2, y_ptr + 8, linesize, s, 0) + | |
459 | dv_init_enc_block(enc_blk + 3, NULL, linesize, s, 0); | |
460 | } else { | |
461 | vs_bit_size += | |
462 | dv_init_enc_block(enc_blk + 0, y_ptr, linesize, s, 0) + | |
463 | dv_init_enc_block(enc_blk + 1, y_ptr + 8, linesize, s, 0) + | |
464 | dv_init_enc_block(enc_blk + 2, y_ptr + y_stride, linesize, s, 0) + | |
465 | dv_init_enc_block(enc_blk + 3, y_ptr + 8 + y_stride, linesize, s, 0); | |
466 | } | |
467 | enc_blk += 4; | |
468 | ||
469 | /* initializing chrominance blocks */ | |
470 | c_offset = (((mb_y >> (s->sys->pix_fmt == AV_PIX_FMT_YUV420P)) * s->frame->linesize[1] + | |
471 | (mb_x >> ((s->sys->pix_fmt == AV_PIX_FMT_YUV411P) ? 2 : 1))) << 3); | |
472 | for (j = 2; j; j--) { | |
473 | uint8_t *c_ptr = s->frame->data[j] + c_offset; | |
474 | linesize = s->frame->linesize[j]; | |
475 | y_stride = (mb_y == 134) ? 8 : (s->frame->linesize[j] << 3); | |
476 | if (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) { | |
477 | uint8_t *d; | |
478 | uint8_t *b = scratch; | |
479 | for (i = 0; i < 8; i++) { | |
480 | d = c_ptr + (linesize << 3); | |
481 | b[0] = c_ptr[0]; | |
482 | b[1] = c_ptr[1]; | |
483 | b[2] = c_ptr[2]; | |
484 | b[3] = c_ptr[3]; | |
485 | b[4] = d[0]; | |
486 | b[5] = d[1]; | |
487 | b[6] = d[2]; | |
488 | b[7] = d[3]; | |
489 | c_ptr += linesize; | |
490 | b += 16; | |
491 | } | |
492 | c_ptr = scratch; | |
493 | linesize = 16; | |
494 | } | |
495 | ||
496 | vs_bit_size += dv_init_enc_block(enc_blk++, c_ptr, linesize, s, 1); | |
497 | if (s->sys->bpm == 8) | |
498 | vs_bit_size += dv_init_enc_block(enc_blk++, c_ptr + y_stride, | |
499 | linesize, s, 1); | |
500 | } | |
501 | } | |
502 | ||
503 | if (vs_total_ac_bits < vs_bit_size) | |
504 | dv_guess_qnos(&enc_blks[0], qnosp); | |
505 | ||
506 | /* DIF encoding process */ | |
507 | for (j = 0; j < 5 * s->sys->bpm;) { | |
508 | int start_mb = j; | |
509 | ||
510 | dif[3] = *qnosp++; | |
511 | dif += 4; | |
512 | ||
513 | /* First pass over individual cells only */ | |
514 | for (i = 0; i < s->sys->bpm; i++, j++) { | |
515 | int sz = s->sys->block_sizes[i] >> 3; | |
516 | ||
517 | init_put_bits(&pbs[j], dif, sz); | |
518 | put_sbits(&pbs[j], 9, ((enc_blks[j].mb[0] >> 3) - 1024 + 2) >> 2); | |
519 | put_bits(&pbs[j], 1, enc_blks[j].dct_mode); | |
520 | put_bits(&pbs[j], 2, enc_blks[j].cno); | |
521 | ||
522 | dv_encode_ac(&enc_blks[j], &pbs[j], &pbs[j + 1]); | |
523 | dif += sz; | |
524 | } | |
525 | ||
526 | /* Second pass over each MB space */ | |
527 | pb = &pbs[start_mb]; | |
528 | for (i = 0; i < s->sys->bpm; i++) | |
529 | if (enc_blks[start_mb + i].partial_bit_count) | |
530 | pb = dv_encode_ac(&enc_blks[start_mb + i], pb, | |
531 | &pbs[start_mb + s->sys->bpm]); | |
532 | } | |
533 | ||
534 | /* Third and final pass over the whole video segment space */ | |
535 | pb = &pbs[0]; | |
536 | for (j = 0; j < 5 * s->sys->bpm; j++) { | |
537 | if (enc_blks[j].partial_bit_count) | |
538 | pb = dv_encode_ac(&enc_blks[j], pb, &pbs[s->sys->bpm * 5]); | |
539 | if (enc_blks[j].partial_bit_count) | |
540 | av_log(avctx, AV_LOG_ERROR, "ac bitstream overflow\n"); | |
541 | } | |
542 | ||
543 | for (j = 0; j < 5 * s->sys->bpm; j++) { | |
544 | int pos; | |
545 | int size = pbs[j].size_in_bits >> 3; | |
546 | flush_put_bits(&pbs[j]); | |
547 | pos = put_bits_count(&pbs[j]) >> 3; | |
548 | if (pos > size) { | |
549 | av_log(avctx, AV_LOG_ERROR, | |
550 | "bitstream written beyond buffer size\n"); | |
551 | return -1; | |
552 | } | |
553 | memset(pbs[j].buf + pos, 0xff, size - pos); | |
554 | } | |
555 | ||
556 | return 0; | |
557 | } | |
558 | ||
559 | static inline int dv_write_pack(enum dv_pack_type pack_id, DVVideoContext *c, | |
560 | uint8_t *buf) | |
561 | { | |
562 | /* | |
563 | * Here's what SMPTE314M says about these two: | |
564 | * (page 6) APTn, AP1n, AP2n, AP3n: These data shall be identical | |
565 | * as track application IDs (APTn = 001, AP1n = | |
566 | * 001, AP2n = 001, AP3n = 001), if the source signal | |
567 | * comes from a digital VCR. If the signal source is | |
568 | * unknown, all bits for these data shall be set to 1. | |
569 | * (page 12) STYPE: STYPE defines a signal type of video signal | |
570 | * 00000b = 4:1:1 compression | |
571 | * 00100b = 4:2:2 compression | |
572 | * XXXXXX = Reserved | |
573 | * Now, I've got two problems with these statements: | |
574 | * 1. it looks like APT == 111b should be a safe bet, but it isn't. | |
575 | * It seems that for PAL as defined in IEC 61834 we have to set | |
576 | * APT to 000 and for SMPTE314M to 001. | |
577 | * 2. It is not at all clear what STYPE is used for 4:2:0 PAL | |
578 | * compression scheme (if any). | |
579 | */ | |
580 | int apt = (c->sys->pix_fmt == AV_PIX_FMT_YUV420P ? 0 : 1); | |
581 | int fs = c->frame->top_field_first ? 0x00 : 0x40; | |
582 | ||
583 | uint8_t aspect = 0; | |
584 | if ((int) (av_q2d(c->avctx->sample_aspect_ratio) * | |
585 | c->avctx->width / c->avctx->height * 10) >= 17) /* 16:9 */ | |
586 | aspect = 0x02; | |
587 | ||
588 | buf[0] = (uint8_t) pack_id; | |
589 | switch (pack_id) { | |
590 | case dv_header525: /* I can't imagine why these two weren't defined as real */ | |
591 | case dv_header625: /* packs in SMPTE314M -- they definitely look like ones */ | |
592 | buf[1] = 0xf8 | /* reserved -- always 1 */ | |
593 | (apt & 0x07); /* APT: Track application ID */ | |
594 | buf[2] = (0 << 7) | /* TF1: audio data is 0 - valid; 1 - invalid */ | |
595 | (0x0f << 3) | /* reserved -- always 1 */ | |
596 | (apt & 0x07); /* AP1: Audio application ID */ | |
597 | buf[3] = (0 << 7) | /* TF2: video data is 0 - valid; 1 - invalid */ | |
598 | (0x0f << 3) | /* reserved -- always 1 */ | |
599 | (apt & 0x07); /* AP2: Video application ID */ | |
600 | buf[4] = (0 << 7) | /* TF3: subcode(SSYB) is 0 - valid; 1 - invalid */ | |
601 | (0x0f << 3) | /* reserved -- always 1 */ | |
602 | (apt & 0x07); /* AP3: Subcode application ID */ | |
603 | break; | |
604 | case dv_video_source: | |
605 | buf[1] = 0xff; /* reserved -- always 1 */ | |
606 | buf[2] = (1 << 7) | /* B/W: 0 - b/w, 1 - color */ | |
607 | (1 << 6) | /* following CLF is valid - 0, invalid - 1 */ | |
608 | (3 << 4) | /* CLF: color frames ID (see ITU-R BT.470-4) */ | |
609 | 0xf; /* reserved -- always 1 */ | |
610 | buf[3] = (3 << 6) | /* reserved -- always 1 */ | |
611 | (c->sys->dsf << 5) | /* system: 60fields/50fields */ | |
612 | c->sys->video_stype; /* signal type video compression */ | |
613 | buf[4] = 0xff; /* VISC: 0xff -- no information */ | |
614 | break; | |
615 | case dv_video_control: | |
616 | buf[1] = (0 << 6) | /* Copy generation management (CGMS) 0 -- free */ | |
617 | 0x3f; /* reserved -- always 1 */ | |
618 | buf[2] = 0xc8 | /* reserved -- always b11001xxx */ | |
619 | aspect; | |
620 | buf[3] = (1 << 7) | /* frame/field flag 1 -- frame, 0 -- field */ | |
621 | fs | /* first/second field flag 0 -- field 2, 1 -- field 1 */ | |
622 | (1 << 5) | /* frame change flag 0 -- same picture as before, 1 -- different */ | |
623 | (1 << 4) | /* 1 - interlaced, 0 - noninterlaced */ | |
624 | 0xc; /* reserved -- always b1100 */ | |
625 | buf[4] = 0xff; /* reserved -- always 1 */ | |
626 | break; | |
627 | default: | |
628 | buf[1] = | |
629 | buf[2] = | |
630 | buf[3] = | |
631 | buf[4] = 0xff; | |
632 | } | |
633 | return 5; | |
634 | } | |
635 | ||
636 | static inline int dv_write_dif_id(enum dv_section_type t, uint8_t chan_num, | |
637 | uint8_t seq_num, uint8_t dif_num, | |
638 | uint8_t *buf) | |
639 | { | |
640 | buf[0] = (uint8_t) t; /* Section type */ | |
641 | buf[1] = (seq_num << 4) | /* DIF seq number 0-9 for 525/60; 0-11 for 625/50 */ | |
642 | (chan_num << 3) | /* FSC: for 50Mb/s 0 - first channel; 1 - second */ | |
643 | 7; /* reserved -- always 1 */ | |
644 | buf[2] = dif_num; /* DIF block number Video: 0-134, Audio: 0-8 */ | |
645 | return 3; | |
646 | } | |
647 | ||
648 | static inline int dv_write_ssyb_id(uint8_t syb_num, uint8_t fr, uint8_t *buf) | |
649 | { | |
650 | if (syb_num == 0 || syb_num == 6) { | |
651 | buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */ | |
652 | (0 << 4) | /* AP3 (Subcode application ID) */ | |
653 | 0x0f; /* reserved -- always 1 */ | |
654 | } else if (syb_num == 11) { | |
655 | buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */ | |
656 | 0x7f; /* reserved -- always 1 */ | |
657 | } else { | |
658 | buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */ | |
659 | (0 << 4) | /* APT (Track application ID) */ | |
660 | 0x0f; /* reserved -- always 1 */ | |
661 | } | |
662 | buf[1] = 0xf0 | /* reserved -- always 1 */ | |
663 | (syb_num & 0x0f); /* SSYB number 0 - 11 */ | |
664 | buf[2] = 0xff; /* reserved -- always 1 */ | |
665 | return 3; | |
666 | } | |
667 | ||
668 | static void dv_format_frame(DVVideoContext *c, uint8_t *buf) | |
669 | { | |
670 | int chan, i, j, k; | |
671 | ||
672 | for (chan = 0; chan < c->sys->n_difchan; chan++) { | |
673 | for (i = 0; i < c->sys->difseg_size; i++) { | |
674 | memset(buf, 0xff, 80 * 6); /* first 6 DIF blocks are for control data */ | |
675 | ||
676 | /* DV header: 1DIF */ | |
677 | buf += dv_write_dif_id(dv_sect_header, chan, i, 0, buf); | |
678 | buf += dv_write_pack((c->sys->dsf ? dv_header625 : dv_header525), | |
679 | c, buf); | |
680 | buf += 72; /* unused bytes */ | |
681 | ||
682 | /* DV subcode: 2DIFs */ | |
683 | for (j = 0; j < 2; j++) { | |
684 | buf += dv_write_dif_id(dv_sect_subcode, chan, i, j, buf); | |
685 | for (k = 0; k < 6; k++) | |
686 | buf += dv_write_ssyb_id(k, (i < c->sys->difseg_size / 2), buf) + 5; | |
687 | buf += 29; /* unused bytes */ | |
688 | } | |
689 | ||
690 | /* DV VAUX: 3DIFS */ | |
691 | for (j = 0; j < 3; j++) { | |
692 | buf += dv_write_dif_id(dv_sect_vaux, chan, i, j, buf); | |
693 | buf += dv_write_pack(dv_video_source, c, buf); | |
694 | buf += dv_write_pack(dv_video_control, c, buf); | |
695 | buf += 7 * 5; | |
696 | buf += dv_write_pack(dv_video_source, c, buf); | |
697 | buf += dv_write_pack(dv_video_control, c, buf); | |
698 | buf += 4 * 5 + 2; /* unused bytes */ | |
699 | } | |
700 | ||
701 | /* DV Audio/Video: 135 Video DIFs + 9 Audio DIFs */ | |
702 | for (j = 0; j < 135; j++) { | |
703 | if (j % 15 == 0) { | |
704 | memset(buf, 0xff, 80); | |
705 | buf += dv_write_dif_id(dv_sect_audio, chan, i, j / 15, buf); | |
706 | buf += 77; /* audio control & shuffled PCM audio */ | |
707 | } | |
708 | buf += dv_write_dif_id(dv_sect_video, chan, i, j, buf); | |
709 | buf += 77; /* 1 video macroblock: 1 bytes control | |
710 | * 4 * 14 bytes Y 8x8 data | |
711 | * 10 bytes Cr 8x8 data | |
712 | * 10 bytes Cb 8x8 data */ | |
713 | } | |
714 | } | |
715 | } | |
716 | } | |
717 | ||
718 | static int dvvideo_encode_frame(AVCodecContext *c, AVPacket *pkt, | |
719 | const AVFrame *frame, int *got_packet) | |
720 | { | |
721 | DVVideoContext *s = c->priv_data; | |
722 | int ret; | |
723 | ||
724 | if ((ret = ff_alloc_packet2(c, pkt, s->sys->frame_size)) < 0) | |
725 | return ret; | |
726 | ||
727 | c->pix_fmt = s->sys->pix_fmt; | |
728 | s->frame = frame; | |
729 | c->coded_frame->key_frame = 1; | |
730 | c->coded_frame->pict_type = AV_PICTURE_TYPE_I; | |
731 | ||
732 | s->buf = pkt->data; | |
733 | c->execute(c, dv_encode_video_segment, s->work_chunks, NULL, | |
734 | dv_work_pool_size(s->sys), sizeof(DVwork_chunk)); | |
735 | ||
736 | emms_c(); | |
737 | ||
738 | dv_format_frame(s, pkt->data); | |
739 | ||
740 | pkt->flags |= AV_PKT_FLAG_KEY; | |
741 | *got_packet = 1; | |
742 | ||
743 | return 0; | |
744 | } | |
745 | ||
746 | static int dvvideo_encode_close(AVCodecContext *avctx) | |
747 | { | |
748 | av_frame_free(&avctx->coded_frame); | |
749 | return 0; | |
750 | } | |
751 | ||
752 | AVCodec ff_dvvideo_encoder = { | |
753 | .name = "dvvideo", | |
754 | .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"), | |
755 | .type = AVMEDIA_TYPE_VIDEO, | |
756 | .id = AV_CODEC_ID_DVVIDEO, | |
757 | .priv_data_size = sizeof(DVVideoContext), | |
758 | .init = dvvideo_encode_init, | |
759 | .encode2 = dvvideo_encode_frame, | |
760 | .close = dvvideo_encode_close, | |
f6fa7814 | 761 | .capabilities = CODEC_CAP_SLICE_THREADS | CODEC_CAP_FRAME_THREADS | CODEC_CAP_INTRA_ONLY, |
2ba45a60 DM |
762 | .pix_fmts = (const enum AVPixelFormat[]) { |
763 | AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV422P, | |
764 | AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE | |
765 | }, | |
766 | }; |