3 * Copyright (c) 2003 Roman Shaposhnik
5 * This file is part of Libav.
7 * Libav 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.
12 * Libav 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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 #include "libavutil/attributes.h"
28 #include "libavutil/pixdesc.h"
36 #include "dv_tablegen.h"
37 #include "dv_profile_internal.h"
39 static av_cold int dvvideo_encode_init(AVCodecContext *avctx)
41 DVVideoContext *s = avctx->priv_data;
46 s->sys = avpriv_dv_codec_profile(avctx);
48 av_log(avctx, AV_LOG_ERROR, "Found no DV profile for %ix%i %s video. "
49 "Valid DV profiles are:\n",
50 avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt));
51 ff_dv_print_profiles(avctx, AV_LOG_ERROR);
52 return AVERROR(EINVAL);
54 ret = ff_dv_init_dynamic_tables(s, s->sys);
56 av_log(avctx, AV_LOG_ERROR, "Error initializing work tables.\n");
60 avctx->coded_frame = av_frame_alloc();
61 if (!avctx->coded_frame)
62 return AVERROR(ENOMEM);
64 dv_vlc_map_tableinit();
66 ff_dsputil_init(&dsp, avctx);
67 ff_fdctdsp_init(&fdsp, avctx);
68 ff_set_cmp(&dsp, dsp.ildct_cmp, avctx->ildct_cmp);
70 s->get_pixels = dsp.get_pixels;
71 s->ildct_cmp = dsp.ildct_cmp[5];
73 s->fdct[0] = fdsp.fdct;
74 s->fdct[1] = fdsp.fdct248;
76 return ff_dvvideo_init(avctx);
79 /* bit budget for AC only in 5 MBs */
80 static const int vs_total_ac_bits = (100 * 4 + 68*2) * 5;
81 static const int mb_area_start[5] = { 1, 6, 21, 43, 64 };
84 /* Converts run and level (where level != 0) pair into VLC, returning bit size */
85 static av_always_inline int dv_rl2vlc(int run, int level, int sign, uint32_t* vlc)
88 if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
89 *vlc = dv_vlc_map[run][level].vlc | sign;
90 size = dv_vlc_map[run][level].size;
93 if (level < DV_VLC_MAP_LEV_SIZE) {
94 *vlc = dv_vlc_map[0][level].vlc | sign;
95 size = dv_vlc_map[0][level].size;
97 *vlc = 0xfe00 | (level << 1) | sign;
101 *vlc |= ((run < 16) ? dv_vlc_map[run-1][0].vlc :
102 (0x1f80 | (run - 1))) << size;
103 size += (run < 16) ? dv_vlc_map[run-1][0].size : 13;
110 static av_always_inline int dv_rl2vlc_size(int run, int level)
114 if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
115 size = dv_vlc_map[run][level].size;
118 size = (level < DV_VLC_MAP_LEV_SIZE) ? dv_vlc_map[0][level].size : 16;
120 size += (run < 16) ? dv_vlc_map[run-1][0].size : 13;
126 static av_always_inline int dv_rl2vlc(int run, int l, int sign, uint32_t* vlc)
128 *vlc = dv_vlc_map[run][l].vlc | sign;
129 return dv_vlc_map[run][l].size;
132 static av_always_inline int dv_rl2vlc_size(int run, int l)
134 return dv_vlc_map[run][l].size;
138 typedef struct EncBlockInfo {
148 uint8_t partial_bit_count;
149 uint32_t partial_bit_buffer; /* we can't use uint16_t here */
152 static av_always_inline PutBitContext* dv_encode_ac(EncBlockInfo* bi,
153 PutBitContext* pb_pool,
154 PutBitContext* pb_end)
157 PutBitContext* pb = pb_pool;
158 int size = bi->partial_bit_count;
159 uint32_t vlc = bi->partial_bit_buffer;
161 bi->partial_bit_count = bi->partial_bit_buffer = 0;
163 /* Find suitable storage space */
164 for (; size > (bits_left = put_bits_left(pb)); pb++) {
167 put_bits(pb, bits_left, vlc >> size);
168 vlc = vlc & ((1 << size) - 1);
170 if (pb + 1 >= pb_end) {
171 bi->partial_bit_count = size;
172 bi->partial_bit_buffer = vlc;
178 put_bits(pb, size, vlc);
180 if (bi->cur_ac >= 64)
183 /* Construct the next VLC */
185 bi->cur_ac = bi->next[prev];
186 if (bi->cur_ac < 64){
187 size = dv_rl2vlc(bi->cur_ac - prev - 1, bi->mb[bi->cur_ac], bi->sign[bi->cur_ac], &vlc);
189 size = 4; vlc = 6; /* End Of Block stamp */
195 static av_always_inline int dv_guess_dct_mode(DVVideoContext *s, uint8_t *data, int linesize) {
196 if (s->avctx->flags & CODEC_FLAG_INTERLACED_DCT) {
197 int ps = s->ildct_cmp(NULL, data, NULL, linesize, 8) - 400;
199 int is = s->ildct_cmp(NULL, data , NULL, linesize<<1, 4) +
200 s->ildct_cmp(NULL, data + linesize, NULL, linesize<<1, 4);
208 static const int dv_weight_bits = 18;
209 static const int dv_weight_88[64] = {
210 131072, 257107, 257107, 242189, 252167, 242189, 235923, 237536,
211 237536, 235923, 229376, 231390, 223754, 231390, 229376, 222935,
212 224969, 217965, 217965, 224969, 222935, 200636, 218652, 211916,
213 212325, 211916, 218652, 200636, 188995, 196781, 205965, 206433,
214 206433, 205965, 196781, 188995, 185364, 185364, 200636, 200704,
215 200636, 185364, 185364, 174609, 180568, 195068, 195068, 180568,
216 174609, 170091, 175557, 189591, 175557, 170091, 165371, 170627,
217 170627, 165371, 160727, 153560, 160727, 144651, 144651, 136258,
219 static const int dv_weight_248[64] = {
220 131072, 242189, 257107, 237536, 229376, 200636, 242189, 223754,
221 224969, 196781, 262144, 242189, 229376, 200636, 257107, 237536,
222 211916, 185364, 235923, 217965, 229376, 211916, 206433, 180568,
223 242189, 223754, 224969, 196781, 211916, 185364, 235923, 217965,
224 200704, 175557, 222935, 205965, 200636, 185364, 195068, 170627,
225 229376, 211916, 206433, 180568, 200704, 175557, 222935, 205965,
226 175557, 153560, 188995, 174609, 165371, 144651, 200636, 185364,
227 195068, 170627, 175557, 153560, 188995, 174609, 165371, 144651,
230 static av_always_inline int dv_init_enc_block(EncBlockInfo* bi, uint8_t *data, int linesize, DVVideoContext *s, int bias)
233 const uint8_t* zigzag_scan;
234 LOCAL_ALIGNED_16(int16_t, blk, [64]);
236 /* We offer two different methods for class number assignment: the
237 method suggested in SMPTE 314M Table 22, and an improved
238 method. The SMPTE method is very conservative; it assigns class
239 3 (i.e. severe quantization) to any block where the largest AC
240 component is greater than 36. Libav's DV encoder tracks AC bit
241 consumption precisely, so there is no need to bias most blocks
242 towards strongly lossy compression. Instead, we assign class 2
243 to most blocks, and use class 3 only when strictly necessary
244 (for blocks whose largest AC component exceeds 255). */
246 #if 0 /* SMPTE spec method */
247 static const int classes[] = {12, 24, 36, 0xffff};
248 #else /* improved Libav method */
249 static const int classes[] = {-1, -1, 255, 0xffff};
251 int max = classes[0];
254 assert((((int)blk) & 15) == 0);
256 bi->area_q[0] = bi->area_q[1] = bi->area_q[2] = bi->area_q[3] = 0;
257 bi->partial_bit_count = 0;
258 bi->partial_bit_buffer = 0;
261 bi->dct_mode = dv_guess_dct_mode(s, data, linesize);
262 s->get_pixels(blk, data, linesize);
263 s->fdct[bi->dct_mode](blk);
265 /* We rely on the fact that encoding all zeros leads to an immediate EOB,
266 which is precisely what the spec calls for in the "dummy" blocks. */
267 memset(blk, 0, 64*sizeof(*blk));
272 zigzag_scan = bi->dct_mode ? ff_dv_zigzag248_direct : ff_zigzag_direct;
273 weight = bi->dct_mode ? dv_weight_248 : dv_weight_88;
275 for (area = 0; area < 4; area++) {
276 bi->prev[area] = prev;
277 bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :)
278 for (i = mb_area_start[area]; i < mb_area_start[area+1]; i++) {
279 int level = blk[zigzag_scan[i]];
281 if (level + 15 > 30U) {
282 bi->sign[i] = (level >> 31) & 1;
283 /* weight it and and shift down into range, adding for rounding */
284 /* the extra division by a factor of 2^4 reverses the 8x expansion of the DCT
285 AND the 2x doubling of the weights */
286 level = (FFABS(level) * weight[i] + (1 << (dv_weight_bits+3))) >> (dv_weight_bits+4);
290 bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, level);
297 for (bi->cno = 0; max > classes[bi->cno]; bi->cno++);
305 for (area = 0; area < 4; area++) {
306 bi->prev[area] = prev;
307 bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :)
308 for (; i < mb_area_start[area+1]; i = bi->next[i]) {
312 bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, bi->mb[i]);
321 return bi->bit_size[0] + bi->bit_size[1] + bi->bit_size[2] + bi->bit_size[3];
324 static inline void dv_guess_qnos(EncBlockInfo* blks, int* qnos)
327 int i, j, k, a, prev, a2;
330 size[0] = size[1] = size[2] = size[3] = size[4] = 1 << 24;
333 for (i = 0; i < 5; i++) {
339 for (j = 0; j < 6; j++, b++) {
340 for (a = 0; a < 4; a++) {
341 if (b->area_q[a] != ff_dv_quant_shifts[qnos[i] + ff_dv_quant_offset[b->cno]][a]) {
342 b->bit_size[a] = 1; // 4 areas 4 bits for EOB :)
345 assert(b->next[prev] >= mb_area_start[a+1] || b->mb[prev]);
346 for (k = b->next[prev] ; k < mb_area_start[a+1]; k = b->next[k]) {
349 b->bit_size[a] += dv_rl2vlc_size(k - prev - 1, b->mb[k]);
352 if (b->next[k] >= mb_area_start[a+1] && b->next[k]<64){
353 for (a2 = a + 1; b->next[k] >= mb_area_start[a2+1]; a2++)
356 assert(b->mb[b->next[k]]);
357 b->bit_size[a2] += dv_rl2vlc_size(b->next[k] - prev - 1, b->mb[b->next[k]])
358 -dv_rl2vlc_size(b->next[k] - k - 1, b->mb[b->next[k]]);
359 assert(b->prev[a2] == k && (a2 + 1 >= 4 || b->prev[a2+1] != k));
362 b->next[prev] = b->next[k];
367 size[i] += b->bit_size[a];
370 if (vs_total_ac_bits >= size[0] + size[1] + size[2] + size[3] + size[4])
373 } while (qnos[0]|qnos[1]|qnos[2]|qnos[3]|qnos[4]);
376 for (a = 2; a == 2 || vs_total_ac_bits < size[0]; a += a){
378 size[0] = 5 * 6 * 4; //EOB
379 for (j = 0; j < 6 *5; j++, b++) {
381 for (k = b->next[prev]; k < 64; k = b->next[k]) {
382 if (b->mb[k] < a && b->mb[k] > -a){
383 b->next[prev] = b->next[k];
385 size[0] += dv_rl2vlc_size(k - prev - 1, b->mb[k]);
393 static int dv_encode_video_segment(AVCodecContext *avctx, void *arg)
395 DVVideoContext *s = avctx->priv_data;
396 DVwork_chunk *work_chunk = arg;
398 int mb_x, mb_y, c_offset, linesize, y_stride;
401 LOCAL_ALIGNED_8(uint8_t, scratch, [128]);
402 EncBlockInfo enc_blks[5*DV_MAX_BPM];
403 PutBitContext pbs[5*DV_MAX_BPM];
405 EncBlockInfo* enc_blk;
407 int qnos[5] = {15, 15, 15, 15, 15}; /* No quantization */
408 int* qnosp = &qnos[0];
410 dif = &s->buf[work_chunk->buf_offset*80];
411 enc_blk = &enc_blks[0];
412 for (mb_index = 0; mb_index < 5; mb_index++) {
413 dv_calculate_mb_xy(s, work_chunk, mb_index, &mb_x, &mb_y);
415 /* initializing luminance blocks */
416 if ((s->sys->pix_fmt == AV_PIX_FMT_YUV420P) ||
417 (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) ||
418 (s->sys->height >= 720 && mb_y != 134)) {
419 y_stride = s->frame->linesize[0] << 3;
423 y_ptr = s->frame->data[0] + ((mb_y * s->frame->linesize[0] + mb_x) << 3);
424 linesize = s->frame->linesize[0];
426 if (s->sys->video_stype == 4) { /* SD 422 */
428 dv_init_enc_block(enc_blk+0, y_ptr , linesize, s, 0) +
429 dv_init_enc_block(enc_blk+1, NULL , linesize, s, 0) +
430 dv_init_enc_block(enc_blk+2, y_ptr + 8 , linesize, s, 0) +
431 dv_init_enc_block(enc_blk+3, NULL , linesize, s, 0);
434 dv_init_enc_block(enc_blk+0, y_ptr , linesize, s, 0) +
435 dv_init_enc_block(enc_blk+1, y_ptr + 8 , linesize, s, 0) +
436 dv_init_enc_block(enc_blk+2, y_ptr + y_stride, linesize, s, 0) +
437 dv_init_enc_block(enc_blk+3, y_ptr + 8 + y_stride, linesize, s, 0);
441 /* initializing chrominance blocks */
442 c_offset = (((mb_y >> (s->sys->pix_fmt == AV_PIX_FMT_YUV420P)) * s->frame->linesize[1] +
443 (mb_x >> ((s->sys->pix_fmt == AV_PIX_FMT_YUV411P) ? 2 : 1))) << 3);
444 for (j = 2; j; j--) {
445 uint8_t *c_ptr = s->frame->data[j] + c_offset;
446 linesize = s->frame->linesize[j];
447 y_stride = (mb_y == 134) ? 8 : (s->frame->linesize[j] << 3);
448 if (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) {
450 uint8_t* b = scratch;
451 for (i = 0; i < 8; i++) {
452 d = c_ptr + (linesize << 3);
453 b[0] = c_ptr[0]; b[1] = c_ptr[1]; b[2] = c_ptr[2]; b[3] = c_ptr[3];
454 b[4] = d[0]; b[5] = d[1]; b[6] = d[2]; b[7] = d[3];
462 vs_bit_size += dv_init_enc_block( enc_blk++, c_ptr , linesize, s, 1);
463 if (s->sys->bpm == 8) {
464 vs_bit_size += dv_init_enc_block(enc_blk++, c_ptr + y_stride, linesize, s, 1);
469 if (vs_total_ac_bits < vs_bit_size)
470 dv_guess_qnos(&enc_blks[0], qnosp);
472 /* DIF encoding process */
473 for (j=0; j<5*s->sys->bpm;) {
479 /* First pass over individual cells only */
480 for (i=0; i<s->sys->bpm; i++, j++) {
481 int sz = s->sys->block_sizes[i]>>3;
483 init_put_bits(&pbs[j], dif, sz);
484 put_sbits(&pbs[j], 9, ((enc_blks[j].mb[0] >> 3) - 1024 + 2) >> 2);
485 put_bits(&pbs[j], 1, enc_blks[j].dct_mode);
486 put_bits(&pbs[j], 2, enc_blks[j].cno);
488 dv_encode_ac(&enc_blks[j], &pbs[j], &pbs[j+1]);
492 /* Second pass over each MB space */
494 for (i=0; i<s->sys->bpm; i++) {
495 if (enc_blks[start_mb+i].partial_bit_count)
496 pb = dv_encode_ac(&enc_blks[start_mb+i], pb, &pbs[start_mb+s->sys->bpm]);
500 /* Third and final pass over the whole video segment space */
502 for (j=0; j<5*s->sys->bpm; j++) {
503 if (enc_blks[j].partial_bit_count)
504 pb = dv_encode_ac(&enc_blks[j], pb, &pbs[s->sys->bpm*5]);
505 if (enc_blks[j].partial_bit_count)
506 av_log(avctx, AV_LOG_ERROR, "ac bitstream overflow\n");
509 for (j=0; j<5*s->sys->bpm; j++) {
511 int size = pbs[j].size_in_bits >> 3;
512 flush_put_bits(&pbs[j]);
513 pos = put_bits_count(&pbs[j]) >> 3;
515 av_log(avctx, AV_LOG_ERROR, "bitstream written beyond buffer size\n");
518 memset(pbs[j].buf + pos, 0xff, size - pos);
524 static inline int dv_write_pack(enum dv_pack_type pack_id, DVVideoContext *c,
528 * Here's what SMPTE314M says about these two:
529 * (page 6) APTn, AP1n, AP2n, AP3n: These data shall be identical
530 * as track application IDs (APTn = 001, AP1n =
531 * 001, AP2n = 001, AP3n = 001), if the source signal
532 * comes from a digital VCR. If the signal source is
533 * unknown, all bits for these data shall be set to 1.
534 * (page 12) STYPE: STYPE defines a signal type of video signal
535 * 00000b = 4:1:1 compression
536 * 00100b = 4:2:2 compression
538 * Now, I've got two problems with these statements:
539 * 1. it looks like APT == 111b should be a safe bet, but it isn't.
540 * It seems that for PAL as defined in IEC 61834 we have to set
541 * APT to 000 and for SMPTE314M to 001.
542 * 2. It is not at all clear what STYPE is used for 4:2:0 PAL
543 * compression scheme (if any).
545 int apt = (c->sys->pix_fmt == AV_PIX_FMT_YUV420P ? 0 : 1);
548 if ((int)(av_q2d(c->avctx->sample_aspect_ratio) * c->avctx->width / c->avctx->height * 10) >= 17) /* 16:9 */
551 buf[0] = (uint8_t)pack_id;
553 case dv_header525: /* I can't imagine why these two weren't defined as real */
554 case dv_header625: /* packs in SMPTE314M -- they definitely look like ones */
555 buf[1] = 0xf8 | /* reserved -- always 1 */
556 (apt & 0x07); /* APT: Track application ID */
557 buf[2] = (0 << 7) | /* TF1: audio data is 0 - valid; 1 - invalid */
558 (0x0f << 3) | /* reserved -- always 1 */
559 (apt & 0x07); /* AP1: Audio application ID */
560 buf[3] = (0 << 7) | /* TF2: video data is 0 - valid; 1 - invalid */
561 (0x0f << 3) | /* reserved -- always 1 */
562 (apt & 0x07); /* AP2: Video application ID */
563 buf[4] = (0 << 7) | /* TF3: subcode(SSYB) is 0 - valid; 1 - invalid */
564 (0x0f << 3) | /* reserved -- always 1 */
565 (apt & 0x07); /* AP3: Subcode application ID */
567 case dv_video_source:
568 buf[1] = 0xff; /* reserved -- always 1 */
569 buf[2] = (1 << 7) | /* B/W: 0 - b/w, 1 - color */
570 (1 << 6) | /* following CLF is valid - 0, invalid - 1 */
571 (3 << 4) | /* CLF: color frames ID (see ITU-R BT.470-4) */
572 0xf; /* reserved -- always 1 */
573 buf[3] = (3 << 6) | /* reserved -- always 1 */
574 (c->sys->dsf << 5) | /* system: 60fields/50fields */
575 c->sys->video_stype; /* signal type video compression */
576 buf[4] = 0xff; /* VISC: 0xff -- no information */
578 case dv_video_control:
579 buf[1] = (0 << 6) | /* Copy generation management (CGMS) 0 -- free */
580 0x3f; /* reserved -- always 1 */
581 buf[2] = 0xc8 | /* reserved -- always b11001xxx */
583 buf[3] = (1 << 7) | /* frame/field flag 1 -- frame, 0 -- field */
584 (1 << 6) | /* first/second field flag 0 -- field 2, 1 -- field 1 */
585 (1 << 5) | /* frame change flag 0 -- same picture as before, 1 -- different */
586 (1 << 4) | /* 1 - interlaced, 0 - noninterlaced */
587 0xc; /* reserved -- always b1100 */
588 buf[4] = 0xff; /* reserved -- always 1 */
591 buf[1] = buf[2] = buf[3] = buf[4] = 0xff;
596 static inline int dv_write_dif_id(enum dv_section_type t, uint8_t chan_num,
597 uint8_t seq_num, uint8_t dif_num,
600 buf[0] = (uint8_t)t; /* Section type */
601 buf[1] = (seq_num << 4) | /* DIF seq number 0-9 for 525/60; 0-11 for 625/50 */
602 (chan_num << 3) | /* FSC: for 50Mb/s 0 - first channel; 1 - second */
603 7; /* reserved -- always 1 */
604 buf[2] = dif_num; /* DIF block number Video: 0-134, Audio: 0-8 */
609 static inline int dv_write_ssyb_id(uint8_t syb_num, uint8_t fr, uint8_t* buf)
611 if (syb_num == 0 || syb_num == 6) {
612 buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
613 (0 << 4) | /* AP3 (Subcode application ID) */
614 0x0f; /* reserved -- always 1 */
616 else if (syb_num == 11) {
617 buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
618 0x7f; /* reserved -- always 1 */
621 buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
622 (0 << 4) | /* APT (Track application ID) */
623 0x0f; /* reserved -- always 1 */
625 buf[1] = 0xf0 | /* reserved -- always 1 */
626 (syb_num & 0x0f); /* SSYB number 0 - 11 */
627 buf[2] = 0xff; /* reserved -- always 1 */
631 static void dv_format_frame(DVVideoContext* c, uint8_t* buf)
635 for (chan = 0; chan < c->sys->n_difchan; chan++) {
636 for (i = 0; i < c->sys->difseg_size; i++) {
637 memset(buf, 0xff, 80 * 6); /* first 6 DIF blocks are for control data */
639 /* DV header: 1DIF */
640 buf += dv_write_dif_id(dv_sect_header, chan, i, 0, buf);
641 buf += dv_write_pack((c->sys->dsf ? dv_header625 : dv_header525), c, buf);
642 buf += 72; /* unused bytes */
644 /* DV subcode: 2DIFs */
645 for (j = 0; j < 2; j++) {
646 buf += dv_write_dif_id(dv_sect_subcode, chan, i, j, buf);
647 for (k = 0; k < 6; k++)
648 buf += dv_write_ssyb_id(k, (i < c->sys->difseg_size/2), buf) + 5;
649 buf += 29; /* unused bytes */
653 for (j = 0; j < 3; j++) {
654 buf += dv_write_dif_id(dv_sect_vaux, chan, i, j, buf);
655 buf += dv_write_pack(dv_video_source, c, buf);
656 buf += dv_write_pack(dv_video_control, c, buf);
658 buf += dv_write_pack(dv_video_source, c, buf);
659 buf += dv_write_pack(dv_video_control, c, buf);
660 buf += 4*5 + 2; /* unused bytes */
663 /* DV Audio/Video: 135 Video DIFs + 9 Audio DIFs */
664 for (j = 0; j < 135; j++) {
666 memset(buf, 0xff, 80);
667 buf += dv_write_dif_id(dv_sect_audio, chan, i, j/15, buf);
668 buf += 77; /* audio control & shuffled PCM audio */
670 buf += dv_write_dif_id(dv_sect_video, chan, i, j, buf);
671 buf += 77; /* 1 video macroblock: 1 bytes control
672 4 * 14 bytes Y 8x8 data
674 10 bytes Cb 8x8 data */
681 static int dvvideo_encode_frame(AVCodecContext *c, AVPacket *pkt,
682 const AVFrame *frame, int *got_packet)
684 DVVideoContext *s = c->priv_data;
687 if ((ret = ff_alloc_packet(pkt, s->sys->frame_size)) < 0) {
688 av_log(c, AV_LOG_ERROR, "Error getting output packet.\n");
692 c->pix_fmt = s->sys->pix_fmt;
694 c->coded_frame->key_frame = 1;
695 c->coded_frame->pict_type = AV_PICTURE_TYPE_I;
698 c->execute(c, dv_encode_video_segment, s->work_chunks, NULL,
699 dv_work_pool_size(s->sys), sizeof(DVwork_chunk));
703 dv_format_frame(s, pkt->data);
705 pkt->flags |= AV_PKT_FLAG_KEY;
711 static int dvvideo_encode_close(AVCodecContext *avctx)
713 av_frame_free(&avctx->coded_frame);
717 AVCodec ff_dvvideo_encoder = {
719 .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"),
720 .type = AVMEDIA_TYPE_VIDEO,
721 .id = AV_CODEC_ID_DVVIDEO,
722 .priv_data_size = sizeof(DVVideoContext),
723 .init = dvvideo_encode_init,
724 .encode2 = dvvideo_encode_frame,
725 .close = dvvideo_encode_close,
726 .capabilities = CODEC_CAP_SLICE_THREADS,
727 .pix_fmts = (const enum AVPixelFormat[]) {
728 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE