3 * Copyright (c) 2003 Roman Shaposhnik
5 * This file is part of FFmpeg.
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.
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.
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
29 #include "libavutil/attributes.h"
30 #include "libavutil/internal.h"
31 #include "libavutil/pixdesc.h"
35 #include "dv_profile_internal.h"
36 #include "dv_tablegen.h"
41 #include "pixblockdsp.h"
44 static av_cold int dvvideo_encode_init(AVCodecContext *avctx)
46 DVVideoContext *s = avctx->priv_data;
49 PixblockDSPContext pdsp;
52 s->sys = av_dv_codec_profile2(avctx->width, avctx->height, avctx->pix_fmt, avctx->time_base);
54 av_log(avctx, AV_LOG_ERROR, "Found no DV profile for %ix%i %s video. "
55 "Valid DV profiles are:\n",
56 avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt));
57 ff_dv_print_profiles(avctx, AV_LOG_ERROR);
58 return AVERROR(EINVAL);
60 if (avctx->height > 576) {
61 av_log(avctx, AV_LOG_ERROR, "DVCPRO HD encoding is not supported.\n");
62 return AVERROR_PATCHWELCOME;
64 ret = ff_dv_init_dynamic_tables(s, s->sys);
66 av_log(avctx, AV_LOG_ERROR, "Error initializing work tables.\n");
70 dv_vlc_map_tableinit();
72 memset(&fdsp,0, sizeof(fdsp));
73 memset(&mecc,0, sizeof(mecc));
74 memset(&pdsp,0, sizeof(pdsp));
75 ff_fdctdsp_init(&fdsp, avctx);
76 ff_me_cmp_init(&mecc, avctx);
77 ff_pixblockdsp_init(&pdsp, avctx);
78 ff_set_cmp(&mecc, mecc.ildct_cmp, avctx->ildct_cmp);
80 s->get_pixels = pdsp.get_pixels;
81 s->ildct_cmp = mecc.ildct_cmp[5];
83 s->fdct[0] = fdsp.fdct;
84 s->fdct[1] = fdsp.fdct248;
86 return ff_dvvideo_init(avctx);
89 /* bit budget for AC only in 5 MBs */
90 static const int vs_total_ac_bits = (100 * 4 + 68 * 2) * 5;
91 static const int mb_area_start[5] = { 1, 6, 21, 43, 64 };
94 /* Convert run and level (where level != 0) pair into VLC, returning bit size */
95 static av_always_inline int dv_rl2vlc(int run, int level, int sign,
99 if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
100 *vlc = dv_vlc_map[run][level].vlc | sign;
101 size = dv_vlc_map[run][level].size;
103 if (level < DV_VLC_MAP_LEV_SIZE) {
104 *vlc = dv_vlc_map[0][level].vlc | sign;
105 size = dv_vlc_map[0][level].size;
107 *vlc = 0xfe00 | (level << 1) | sign;
111 *vlc |= ((run < 16) ? dv_vlc_map[run - 1][0].vlc :
112 (0x1f80 | (run - 1))) << size;
113 size += (run < 16) ? dv_vlc_map[run - 1][0].size : 13;
120 static av_always_inline int dv_rl2vlc_size(int run, int level)
124 if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
125 size = dv_vlc_map[run][level].size;
127 size = (level < DV_VLC_MAP_LEV_SIZE) ? dv_vlc_map[0][level].size : 16;
129 size += (run < 16) ? dv_vlc_map[run - 1][0].size : 13;
134 static av_always_inline int dv_rl2vlc(int run, int l, int sign, uint32_t *vlc)
136 *vlc = dv_vlc_map[run][l].vlc | sign;
137 return dv_vlc_map[run][l].size;
140 static av_always_inline int dv_rl2vlc_size(int run, int l)
142 return dv_vlc_map[run][l].size;
146 typedef struct EncBlockInfo {
156 uint8_t partial_bit_count;
157 uint32_t partial_bit_buffer; /* we can't use uint16_t here */
160 static av_always_inline PutBitContext *dv_encode_ac(EncBlockInfo *bi,
161 PutBitContext *pb_pool,
162 PutBitContext *pb_end)
165 PutBitContext *pb = pb_pool;
166 int size = bi->partial_bit_count;
167 uint32_t vlc = bi->partial_bit_buffer;
169 bi->partial_bit_count =
170 bi->partial_bit_buffer = 0;
172 /* Find suitable storage space */
173 for (; size > (bits_left = put_bits_left(pb)); pb++) {
176 put_bits(pb, bits_left, vlc >> size);
177 vlc = av_mod_uintp2(vlc, size);
179 if (pb + 1 >= pb_end) {
180 bi->partial_bit_count = size;
181 bi->partial_bit_buffer = vlc;
187 put_bits(pb, size, vlc);
189 if (bi->cur_ac >= 64)
192 /* Construct the next VLC */
194 bi->cur_ac = bi->next[prev];
195 if (bi->cur_ac < 64) {
196 size = dv_rl2vlc(bi->cur_ac - prev - 1, bi->mb[bi->cur_ac],
197 bi->sign[bi->cur_ac], &vlc);
200 vlc = 6; /* End Of Block stamp */
206 static av_always_inline int dv_guess_dct_mode(DVVideoContext *s, uint8_t *data,
209 if (s->avctx->flags & AV_CODEC_FLAG_INTERLACED_DCT) {
210 int ps = s->ildct_cmp(NULL, data, NULL, linesize, 8) - 400;
212 int is = s->ildct_cmp(NULL, data, NULL, linesize << 1, 4) +
213 s->ildct_cmp(NULL, data + linesize, NULL, linesize << 1, 4);
221 static const int dv_weight_bits = 18;
222 static const int dv_weight_88[64] = {
223 131072, 257107, 257107, 242189, 252167, 242189, 235923, 237536,
224 237536, 235923, 229376, 231390, 223754, 231390, 229376, 222935,
225 224969, 217965, 217965, 224969, 222935, 200636, 218652, 211916,
226 212325, 211916, 218652, 200636, 188995, 196781, 205965, 206433,
227 206433, 205965, 196781, 188995, 185364, 185364, 200636, 200704,
228 200636, 185364, 185364, 174609, 180568, 195068, 195068, 180568,
229 174609, 170091, 175557, 189591, 175557, 170091, 165371, 170627,
230 170627, 165371, 160727, 153560, 160727, 144651, 144651, 136258,
232 static const int dv_weight_248[64] = {
233 131072, 262144, 257107, 257107, 242189, 242189, 242189, 242189,
234 237536, 237536, 229376, 229376, 200636, 200636, 224973, 224973,
235 223754, 223754, 235923, 235923, 229376, 229376, 217965, 217965,
236 211916, 211916, 196781, 196781, 185364, 185364, 206433, 206433,
237 211916, 211916, 222935, 222935, 200636, 200636, 205964, 205964,
238 200704, 200704, 180568, 180568, 175557, 175557, 195068, 195068,
239 185364, 185364, 188995, 188995, 174606, 174606, 175557, 175557,
240 170627, 170627, 153560, 153560, 165371, 165371, 144651, 144651,
243 static av_always_inline int dv_init_enc_block(EncBlockInfo *bi, uint8_t *data,
244 int linesize, DVVideoContext *s,
248 const uint8_t *zigzag_scan;
249 LOCAL_ALIGNED_16(int16_t, blk, [64]);
251 /* We offer two different methods for class number assignment: the
252 * method suggested in SMPTE 314M Table 22, and an improved
253 * method. The SMPTE method is very conservative; it assigns class
254 * 3 (i.e. severe quantization) to any block where the largest AC
255 * component is greater than 36. FFmpeg's DV encoder tracks AC bit
256 * consumption precisely, so there is no need to bias most blocks
257 * towards strongly lossy compression. Instead, we assign class 2
258 * to most blocks, and use class 3 only when strictly necessary
259 * (for blocks whose largest AC component exceeds 255). */
261 #if 0 /* SMPTE spec method */
262 static const int classes[] = { 12, 24, 36, 0xffff };
263 #else /* improved FFmpeg method */
264 static const int classes[] = { -1, -1, 255, 0xffff };
266 int max = classes[0];
269 av_assert2((((int) blk) & 15) == 0);
275 bi->partial_bit_count = 0;
276 bi->partial_bit_buffer = 0;
279 bi->dct_mode = dv_guess_dct_mode(s, data, linesize);
280 s->get_pixels(blk, data, linesize);
281 s->fdct[bi->dct_mode](blk);
283 /* We rely on the fact that encoding all zeros leads to an immediate
284 * EOB, which is precisely what the spec calls for in the "dummy"
286 memset(blk, 0, 64 * sizeof(*blk));
291 zigzag_scan = bi->dct_mode ? ff_dv_zigzag248_direct : ff_zigzag_direct;
292 weight = bi->dct_mode ? dv_weight_248 : dv_weight_88;
294 for (area = 0; area < 4; area++) {
295 bi->prev[area] = prev;
296 bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :)
297 for (i = mb_area_start[area]; i < mb_area_start[area + 1]; i++) {
298 int level = blk[zigzag_scan[i]];
300 if (level + 15 > 30U) {
301 bi->sign[i] = (level >> 31) & 1;
302 /* Weight it and shift down into range, adding for rounding.
303 * The extra division by a factor of 2^4 reverses the 8x
304 * expansion of the DCT AND the 2x doubling of the weights. */
305 level = (FFABS(level) * weight[i] + (1 << (dv_weight_bits + 3))) >>
306 (dv_weight_bits + 4);
310 bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, level);
317 for (bi->cno = 0; max > classes[bi->cno]; bi->cno++)
326 for (area = 0; area < 4; area++) {
327 bi->prev[area] = prev;
328 bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :)
329 for (; i < mb_area_start[area + 1]; i = bi->next[i]) {
333 bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, bi->mb[i]);
342 return bi->bit_size[0] + bi->bit_size[1] +
343 bi->bit_size[2] + bi->bit_size[3];
346 static inline void dv_guess_qnos(EncBlockInfo *blks, int *qnos)
349 int i, j, k, a, prev, a2;
359 for (i = 0; i < 5; i++) {
365 for (j = 0; j < 6; j++, b++) {
366 for (a = 0; a < 4; a++) {
367 if (b->area_q[a] != ff_dv_quant_shifts[qnos[i] + ff_dv_quant_offset[b->cno]][a]) {
368 b->bit_size[a] = 1; // 4 areas 4 bits for EOB :)
371 av_assert2(b->next[prev] >= mb_area_start[a + 1] || b->mb[prev]);
372 for (k = b->next[prev]; k < mb_area_start[a + 1]; k = b->next[k]) {
375 b->bit_size[a] += dv_rl2vlc_size(k - prev - 1, b->mb[k]);
378 if (b->next[k] >= mb_area_start[a + 1] && b->next[k] < 64) {
379 for (a2 = a + 1; b->next[k] >= mb_area_start[a2 + 1]; a2++)
382 av_assert2(b->mb[b->next[k]]);
383 b->bit_size[a2] += dv_rl2vlc_size(b->next[k] - prev - 1, b->mb[b->next[k]]) -
384 dv_rl2vlc_size(b->next[k] - k - 1, b->mb[b->next[k]]);
385 av_assert2(b->prev[a2] == k && (a2 + 1 >= 4 || b->prev[a2 + 1] != k));
388 b->next[prev] = b->next[k];
391 b->prev[a + 1] = prev;
393 size[i] += b->bit_size[a];
396 if (vs_total_ac_bits >= size[0] + size[1] + size[2] + size[3] + size[4])
399 } while (qnos[0] | qnos[1] | qnos[2] | qnos[3] | qnos[4]);
401 for (a = 2; a == 2 || vs_total_ac_bits < size[0]; a += a) {
403 size[0] = 5 * 6 * 4; // EOB
404 for (j = 0; j < 6 * 5; j++, b++) {
406 for (k = b->next[prev]; k < 64; k = b->next[k]) {
407 if (b->mb[k] < a && b->mb[k] > -a) {
408 b->next[prev] = b->next[k];
410 size[0] += dv_rl2vlc_size(k - prev - 1, b->mb[k]);
418 static int dv_encode_video_segment(AVCodecContext *avctx, void *arg)
420 DVVideoContext *s = avctx->priv_data;
421 DVwork_chunk *work_chunk = arg;
423 int mb_x, mb_y, c_offset, linesize, y_stride;
426 LOCAL_ALIGNED_8(uint8_t, scratch, [128]);
427 EncBlockInfo enc_blks[5 * DV_MAX_BPM];
428 PutBitContext pbs[5 * DV_MAX_BPM];
430 EncBlockInfo *enc_blk;
432 int qnos[5] = { 15, 15, 15, 15, 15 }; /* No quantization */
433 int *qnosp = &qnos[0];
435 dif = &s->buf[work_chunk->buf_offset * 80];
436 enc_blk = &enc_blks[0];
437 for (mb_index = 0; mb_index < 5; mb_index++) {
438 dv_calculate_mb_xy(s, work_chunk, mb_index, &mb_x, &mb_y);
440 /* initializing luminance blocks */
441 if ((s->sys->pix_fmt == AV_PIX_FMT_YUV420P) ||
442 (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) ||
443 (s->sys->height >= 720 && mb_y != 134)) {
444 y_stride = s->frame->linesize[0] << 3;
448 y_ptr = s->frame->data[0] +
449 ((mb_y * s->frame->linesize[0] + mb_x) << 3);
450 linesize = s->frame->linesize[0];
452 if (s->sys->video_stype == 4) { /* SD 422 */
454 dv_init_enc_block(enc_blk + 0, y_ptr, linesize, s, 0) +
455 dv_init_enc_block(enc_blk + 1, NULL, linesize, s, 0) +
456 dv_init_enc_block(enc_blk + 2, y_ptr + 8, linesize, s, 0) +
457 dv_init_enc_block(enc_blk + 3, NULL, linesize, s, 0);
460 dv_init_enc_block(enc_blk + 0, y_ptr, linesize, s, 0) +
461 dv_init_enc_block(enc_blk + 1, y_ptr + 8, linesize, s, 0) +
462 dv_init_enc_block(enc_blk + 2, y_ptr + y_stride, linesize, s, 0) +
463 dv_init_enc_block(enc_blk + 3, y_ptr + 8 + y_stride, linesize, s, 0);
467 /* initializing chrominance blocks */
468 c_offset = (((mb_y >> (s->sys->pix_fmt == AV_PIX_FMT_YUV420P)) * s->frame->linesize[1] +
469 (mb_x >> ((s->sys->pix_fmt == AV_PIX_FMT_YUV411P) ? 2 : 1))) << 3);
470 for (j = 2; j; j--) {
471 uint8_t *c_ptr = s->frame->data[j] + c_offset;
472 linesize = s->frame->linesize[j];
473 y_stride = (mb_y == 134) ? 8 : (s->frame->linesize[j] << 3);
474 if (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) {
476 uint8_t *b = scratch;
477 for (i = 0; i < 8; i++) {
478 d = c_ptr + (linesize << 3);
494 vs_bit_size += dv_init_enc_block(enc_blk++, c_ptr, linesize, s, 1);
495 if (s->sys->bpm == 8)
496 vs_bit_size += dv_init_enc_block(enc_blk++, c_ptr + y_stride,
501 if (vs_total_ac_bits < vs_bit_size)
502 dv_guess_qnos(&enc_blks[0], qnosp);
504 /* DIF encoding process */
505 for (j = 0; j < 5 * s->sys->bpm;) {
511 /* First pass over individual cells only */
512 for (i = 0; i < s->sys->bpm; i++, j++) {
513 int sz = s->sys->block_sizes[i] >> 3;
515 init_put_bits(&pbs[j], dif, sz);
516 put_sbits(&pbs[j], 9, ((enc_blks[j].mb[0] >> 3) - 1024 + 2) >> 2);
517 put_bits(&pbs[j], 1, enc_blks[j].dct_mode);
518 put_bits(&pbs[j], 2, enc_blks[j].cno);
520 dv_encode_ac(&enc_blks[j], &pbs[j], &pbs[j + 1]);
524 /* Second pass over each MB space */
526 for (i = 0; i < s->sys->bpm; i++)
527 if (enc_blks[start_mb + i].partial_bit_count)
528 pb = dv_encode_ac(&enc_blks[start_mb + i], pb,
529 &pbs[start_mb + s->sys->bpm]);
532 /* Third and final pass over the whole video segment space */
534 for (j = 0; j < 5 * s->sys->bpm; j++) {
535 if (enc_blks[j].partial_bit_count)
536 pb = dv_encode_ac(&enc_blks[j], pb, &pbs[s->sys->bpm * 5]);
537 if (enc_blks[j].partial_bit_count)
538 av_log(avctx, AV_LOG_ERROR, "ac bitstream overflow\n");
541 for (j = 0; j < 5 * s->sys->bpm; j++) {
543 int size = pbs[j].size_in_bits >> 3;
544 flush_put_bits(&pbs[j]);
545 pos = put_bits_count(&pbs[j]) >> 3;
547 av_log(avctx, AV_LOG_ERROR,
548 "bitstream written beyond buffer size\n");
551 memset(pbs[j].buf + pos, 0xff, size - pos);
557 static inline int dv_write_pack(enum dv_pack_type pack_id, DVVideoContext *c,
561 * Here's what SMPTE314M says about these two:
562 * (page 6) APTn, AP1n, AP2n, AP3n: These data shall be identical
563 * as track application IDs (APTn = 001, AP1n =
564 * 001, AP2n = 001, AP3n = 001), if the source signal
565 * comes from a digital VCR. If the signal source is
566 * unknown, all bits for these data shall be set to 1.
567 * (page 12) STYPE: STYPE defines a signal type of video signal
568 * 00000b = 4:1:1 compression
569 * 00100b = 4:2:2 compression
571 * Now, I've got two problems with these statements:
572 * 1. it looks like APT == 111b should be a safe bet, but it isn't.
573 * It seems that for PAL as defined in IEC 61834 we have to set
574 * APT to 000 and for SMPTE314M to 001.
575 * 2. It is not at all clear what STYPE is used for 4:2:0 PAL
576 * compression scheme (if any).
578 int apt = (c->sys->pix_fmt == AV_PIX_FMT_YUV420P ? 0 : 1);
579 int fs = c->frame->top_field_first ? 0x00 : 0x40;
582 if ((int) (av_q2d(c->avctx->sample_aspect_ratio) *
583 c->avctx->width / c->avctx->height * 10) >= 17) /* 16:9 */
586 buf[0] = (uint8_t) pack_id;
588 case dv_header525: /* I can't imagine why these two weren't defined as real */
589 case dv_header625: /* packs in SMPTE314M -- they definitely look like ones */
590 buf[1] = 0xf8 | /* reserved -- always 1 */
591 (apt & 0x07); /* APT: Track application ID */
592 buf[2] = (0 << 7) | /* TF1: audio data is 0 - valid; 1 - invalid */
593 (0x0f << 3) | /* reserved -- always 1 */
594 (apt & 0x07); /* AP1: Audio application ID */
595 buf[3] = (0 << 7) | /* TF2: video data is 0 - valid; 1 - invalid */
596 (0x0f << 3) | /* reserved -- always 1 */
597 (apt & 0x07); /* AP2: Video application ID */
598 buf[4] = (0 << 7) | /* TF3: subcode(SSYB) is 0 - valid; 1 - invalid */
599 (0x0f << 3) | /* reserved -- always 1 */
600 (apt & 0x07); /* AP3: Subcode application ID */
602 case dv_video_source:
603 buf[1] = 0xff; /* reserved -- always 1 */
604 buf[2] = (1 << 7) | /* B/W: 0 - b/w, 1 - color */
605 (1 << 6) | /* following CLF is valid - 0, invalid - 1 */
606 (3 << 4) | /* CLF: color frames ID (see ITU-R BT.470-4) */
607 0xf; /* reserved -- always 1 */
608 buf[3] = (3 << 6) | /* reserved -- always 1 */
609 (c->sys->dsf << 5) | /* system: 60fields/50fields */
610 c->sys->video_stype; /* signal type video compression */
611 buf[4] = 0xff; /* VISC: 0xff -- no information */
613 case dv_video_control:
614 buf[1] = (0 << 6) | /* Copy generation management (CGMS) 0 -- free */
615 0x3f; /* reserved -- always 1 */
616 buf[2] = 0xc8 | /* reserved -- always b11001xxx */
618 buf[3] = (1 << 7) | /* frame/field flag 1 -- frame, 0 -- field */
619 fs | /* first/second field flag 0 -- field 2, 1 -- field 1 */
620 (1 << 5) | /* frame change flag 0 -- same picture as before, 1 -- different */
621 (1 << 4) | /* 1 - interlaced, 0 - noninterlaced */
622 0xc; /* reserved -- always b1100 */
623 buf[4] = 0xff; /* reserved -- always 1 */
634 static inline int dv_write_dif_id(enum dv_section_type t, uint8_t chan_num,
635 uint8_t seq_num, uint8_t dif_num,
638 buf[0] = (uint8_t) t; /* Section type */
639 buf[1] = (seq_num << 4) | /* DIF seq number 0-9 for 525/60; 0-11 for 625/50 */
640 (chan_num << 3) | /* FSC: for 50Mb/s 0 - first channel; 1 - second */
641 7; /* reserved -- always 1 */
642 buf[2] = dif_num; /* DIF block number Video: 0-134, Audio: 0-8 */
646 static inline int dv_write_ssyb_id(uint8_t syb_num, uint8_t fr, uint8_t *buf)
648 if (syb_num == 0 || syb_num == 6) {
649 buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
650 (0 << 4) | /* AP3 (Subcode application ID) */
651 0x0f; /* reserved -- always 1 */
652 } else if (syb_num == 11) {
653 buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
654 0x7f; /* reserved -- always 1 */
656 buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
657 (0 << 4) | /* APT (Track application ID) */
658 0x0f; /* reserved -- always 1 */
660 buf[1] = 0xf0 | /* reserved -- always 1 */
661 (syb_num & 0x0f); /* SSYB number 0 - 11 */
662 buf[2] = 0xff; /* reserved -- always 1 */
666 static void dv_format_frame(DVVideoContext *c, uint8_t *buf)
670 for (chan = 0; chan < c->sys->n_difchan; chan++) {
671 for (i = 0; i < c->sys->difseg_size; i++) {
672 memset(buf, 0xff, 80 * 6); /* first 6 DIF blocks are for control data */
674 /* DV header: 1DIF */
675 buf += dv_write_dif_id(dv_sect_header, chan, i, 0, buf);
676 buf += dv_write_pack((c->sys->dsf ? dv_header625 : dv_header525),
678 buf += 72; /* unused bytes */
680 /* DV subcode: 2DIFs */
681 for (j = 0; j < 2; j++) {
682 buf += dv_write_dif_id(dv_sect_subcode, chan, i, j, buf);
683 for (k = 0; k < 6; k++)
684 buf += dv_write_ssyb_id(k, (i < c->sys->difseg_size / 2), buf) + 5;
685 buf += 29; /* unused bytes */
689 for (j = 0; j < 3; j++) {
690 buf += dv_write_dif_id(dv_sect_vaux, chan, i, j, buf);
691 buf += dv_write_pack(dv_video_source, c, buf);
692 buf += dv_write_pack(dv_video_control, c, buf);
694 buf += dv_write_pack(dv_video_source, c, buf);
695 buf += dv_write_pack(dv_video_control, c, buf);
696 buf += 4 * 5 + 2; /* unused bytes */
699 /* DV Audio/Video: 135 Video DIFs + 9 Audio DIFs */
700 for (j = 0; j < 135; j++) {
702 memset(buf, 0xff, 80);
703 buf += dv_write_dif_id(dv_sect_audio, chan, i, j / 15, buf);
704 buf += 77; /* audio control & shuffled PCM audio */
706 buf += dv_write_dif_id(dv_sect_video, chan, i, j, buf);
707 buf += 77; /* 1 video macroblock: 1 bytes control
708 * 4 * 14 bytes Y 8x8 data
709 * 10 bytes Cr 8x8 data
710 * 10 bytes Cb 8x8 data */
716 static int dvvideo_encode_frame(AVCodecContext *c, AVPacket *pkt,
717 const AVFrame *frame, int *got_packet)
719 DVVideoContext *s = c->priv_data;
722 if ((ret = ff_alloc_packet2(c, pkt, s->sys->frame_size, 0)) < 0)
725 c->pix_fmt = s->sys->pix_fmt;
727 #if FF_API_CODED_FRAME
728 FF_DISABLE_DEPRECATION_WARNINGS
729 c->coded_frame->key_frame = 1;
730 c->coded_frame->pict_type = AV_PICTURE_TYPE_I;
731 FF_ENABLE_DEPRECATION_WARNINGS
735 c->execute(c, dv_encode_video_segment, s->work_chunks, NULL,
736 dv_work_pool_size(s->sys), sizeof(DVwork_chunk));
740 dv_format_frame(s, pkt->data);
742 pkt->flags |= AV_PKT_FLAG_KEY;
748 AVCodec ff_dvvideo_encoder = {
750 .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"),
751 .type = AVMEDIA_TYPE_VIDEO,
752 .id = AV_CODEC_ID_DVVIDEO,
753 .priv_data_size = sizeof(DVVideoContext),
754 .init = dvvideo_encode_init,
755 .encode2 = dvvideo_encode_frame,
756 .capabilities = AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_INTRA_ONLY,
757 .pix_fmts = (const enum AVPixelFormat[]) {
758 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV422P,
759 AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE