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
29 #include "libavutil/attributes.h"
30 #include "libavutil/pixdesc.h"
34 #include "dv_profile_internal.h"
35 #include "dv_tablegen.h"
39 #include "pixblockdsp.h"
42 static av_cold int dvvideo_encode_init(AVCodecContext *avctx)
44 DVVideoContext *s = avctx->priv_data;
47 PixblockDSPContext pdsp;
50 s->sys = av_dv_codec_profile(avctx->width, avctx->height, avctx->pix_fmt);
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);
58 ret = ff_dv_init_dynamic_tables(s, s->sys);
60 av_log(avctx, AV_LOG_ERROR, "Error initializing work tables.\n");
64 avctx->coded_frame = av_frame_alloc();
65 if (!avctx->coded_frame)
66 return AVERROR(ENOMEM);
68 dv_vlc_map_tableinit();
70 ff_fdctdsp_init(&fdsp, avctx);
71 ff_me_cmp_init(&mecc, avctx);
72 ff_pixblockdsp_init(&pdsp, avctx);
73 ff_set_cmp(&mecc, mecc.ildct_cmp, avctx->ildct_cmp);
75 s->get_pixels = pdsp.get_pixels;
76 s->ildct_cmp = mecc.ildct_cmp[5];
78 s->fdct[0] = fdsp.fdct;
79 s->fdct[1] = fdsp.fdct248;
81 return ff_dvvideo_init(avctx);
84 /* bit budget for AC only in 5 MBs */
85 static const int vs_total_ac_bits = (100 * 4 + 68 * 2) * 5;
86 static const int mb_area_start[5] = { 1, 6, 21, 43, 64 };
89 /* Convert run and level (where level != 0) pair into VLC, returning bit size */
90 static av_always_inline int dv_rl2vlc(int run, int level, int sign,
94 if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
95 *vlc = dv_vlc_map[run][level].vlc | sign;
96 size = dv_vlc_map[run][level].size;
98 if (level < DV_VLC_MAP_LEV_SIZE) {
99 *vlc = dv_vlc_map[0][level].vlc | sign;
100 size = dv_vlc_map[0][level].size;
102 *vlc = 0xfe00 | (level << 1) | sign;
106 *vlc |= ((run < 16) ? dv_vlc_map[run - 1][0].vlc :
107 (0x1f80 | (run - 1))) << size;
108 size += (run < 16) ? dv_vlc_map[run - 1][0].size : 13;
115 static av_always_inline int dv_rl2vlc_size(int run, int level)
119 if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
120 size = dv_vlc_map[run][level].size;
122 size = (level < DV_VLC_MAP_LEV_SIZE) ? dv_vlc_map[0][level].size : 16;
124 size += (run < 16) ? dv_vlc_map[run - 1][0].size : 13;
129 static av_always_inline int dv_rl2vlc(int run, int l, int sign, uint32_t *vlc)
131 *vlc = dv_vlc_map[run][l].vlc | sign;
132 return dv_vlc_map[run][l].size;
135 static av_always_inline int dv_rl2vlc_size(int run, int l)
137 return dv_vlc_map[run][l].size;
141 typedef struct EncBlockInfo {
151 uint8_t partial_bit_count;
152 uint32_t partial_bit_buffer; /* we can't use uint16_t here */
155 static av_always_inline PutBitContext *dv_encode_ac(EncBlockInfo *bi,
156 PutBitContext *pb_pool,
157 PutBitContext *pb_end)
160 PutBitContext *pb = pb_pool;
161 int size = bi->partial_bit_count;
162 uint32_t vlc = bi->partial_bit_buffer;
164 bi->partial_bit_count =
165 bi->partial_bit_buffer = 0;
167 /* Find suitable storage space */
168 for (; size > (bits_left = put_bits_left(pb)); pb++) {
171 put_bits(pb, bits_left, vlc >> size);
172 vlc = vlc & ((1 << size) - 1);
174 if (pb + 1 >= pb_end) {
175 bi->partial_bit_count = size;
176 bi->partial_bit_buffer = vlc;
182 put_bits(pb, size, vlc);
184 if (bi->cur_ac >= 64)
187 /* Construct the next VLC */
189 bi->cur_ac = bi->next[prev];
190 if (bi->cur_ac < 64) {
191 size = dv_rl2vlc(bi->cur_ac - prev - 1, bi->mb[bi->cur_ac],
192 bi->sign[bi->cur_ac], &vlc);
195 vlc = 6; /* End Of Block stamp */
201 static av_always_inline int dv_guess_dct_mode(DVVideoContext *s, uint8_t *data,
204 if (s->avctx->flags & CODEC_FLAG_INTERLACED_DCT) {
205 int ps = s->ildct_cmp(NULL, data, NULL, linesize, 8) - 400;
207 int is = s->ildct_cmp(NULL, data, NULL, linesize << 1, 4) +
208 s->ildct_cmp(NULL, data + linesize, NULL, linesize << 1, 4);
216 static const int dv_weight_bits = 18;
217 static const int dv_weight_88[64] = {
218 131072, 257107, 257107, 242189, 252167, 242189, 235923, 237536,
219 237536, 235923, 229376, 231390, 223754, 231390, 229376, 222935,
220 224969, 217965, 217965, 224969, 222935, 200636, 218652, 211916,
221 212325, 211916, 218652, 200636, 188995, 196781, 205965, 206433,
222 206433, 205965, 196781, 188995, 185364, 185364, 200636, 200704,
223 200636, 185364, 185364, 174609, 180568, 195068, 195068, 180568,
224 174609, 170091, 175557, 189591, 175557, 170091, 165371, 170627,
225 170627, 165371, 160727, 153560, 160727, 144651, 144651, 136258,
227 static const int dv_weight_248[64] = {
228 131072, 242189, 257107, 237536, 229376, 200636, 242189, 223754,
229 224969, 196781, 262144, 242189, 229376, 200636, 257107, 237536,
230 211916, 185364, 235923, 217965, 229376, 211916, 206433, 180568,
231 242189, 223754, 224969, 196781, 211916, 185364, 235923, 217965,
232 200704, 175557, 222935, 205965, 200636, 185364, 195068, 170627,
233 229376, 211916, 206433, 180568, 200704, 175557, 222935, 205965,
234 175557, 153560, 188995, 174609, 165371, 144651, 200636, 185364,
235 195068, 170627, 175557, 153560, 188995, 174609, 165371, 144651,
238 static av_always_inline int dv_init_enc_block(EncBlockInfo *bi, uint8_t *data,
239 int linesize, DVVideoContext *s,
243 const uint8_t *zigzag_scan;
244 LOCAL_ALIGNED_16(int16_t, blk, [64]);
246 /* We offer two different methods for class number assignment: the
247 * method suggested in SMPTE 314M Table 22, and an improved
248 * method. The SMPTE method is very conservative; it assigns class
249 * 3 (i.e. severe quantization) to any block where the largest AC
250 * component is greater than 36. Libav's DV encoder tracks AC bit
251 * consumption precisely, so there is no need to bias most blocks
252 * towards strongly lossy compression. Instead, we assign class 2
253 * to most blocks, and use class 3 only when strictly necessary
254 * (for blocks whose largest AC component exceeds 255). */
256 #if 0 /* SMPTE spec method */
257 static const int classes[] = { 12, 24, 36, 0xffff };
258 #else /* improved Libav method */
259 static const int classes[] = { -1, -1, 255, 0xffff };
261 int max = classes[0];
264 assert((((int) blk) & 15) == 0);
270 bi->partial_bit_count = 0;
271 bi->partial_bit_buffer = 0;
274 bi->dct_mode = dv_guess_dct_mode(s, data, linesize);
275 s->get_pixels(blk, data, linesize);
276 s->fdct[bi->dct_mode](blk);
278 /* We rely on the fact that encoding all zeros leads to an immediate
279 * EOB, which is precisely what the spec calls for in the "dummy"
281 memset(blk, 0, 64 * sizeof(*blk));
286 zigzag_scan = bi->dct_mode ? ff_dv_zigzag248_direct : ff_zigzag_direct;
287 weight = bi->dct_mode ? dv_weight_248 : dv_weight_88;
289 for (area = 0; area < 4; area++) {
290 bi->prev[area] = prev;
291 bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :)
292 for (i = mb_area_start[area]; i < mb_area_start[area + 1]; i++) {
293 int level = blk[zigzag_scan[i]];
295 if (level + 15 > 30U) {
296 bi->sign[i] = (level >> 31) & 1;
297 /* Weight it and and shift down into range, adding for rounding.
298 * The extra division by a factor of 2^4 reverses the 8x
299 * expansion of the DCT AND the 2x doubling of the weights. */
300 level = (FFABS(level) * weight[i] + (1 << (dv_weight_bits + 3))) >>
301 (dv_weight_bits + 4);
305 bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, level);
312 for (bi->cno = 0; max > classes[bi->cno]; bi->cno++)
321 for (area = 0; area < 4; area++) {
322 bi->prev[area] = prev;
323 bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :)
324 for (; i < mb_area_start[area + 1]; i = bi->next[i]) {
328 bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, bi->mb[i]);
337 return bi->bit_size[0] + bi->bit_size[1] +
338 bi->bit_size[2] + bi->bit_size[3];
341 static inline void dv_guess_qnos(EncBlockInfo *blks, int *qnos)
344 int i, j, k, a, prev, a2;
354 for (i = 0; i < 5; i++) {
360 for (j = 0; j < 6; j++, b++) {
361 for (a = 0; a < 4; a++) {
362 if (b->area_q[a] != ff_dv_quant_shifts[qnos[i] + ff_dv_quant_offset[b->cno]][a]) {
363 b->bit_size[a] = 1; // 4 areas 4 bits for EOB :)
366 assert(b->next[prev] >= mb_area_start[a + 1] || b->mb[prev]);
367 for (k = b->next[prev]; k < mb_area_start[a + 1]; k = b->next[k]) {
370 b->bit_size[a] += dv_rl2vlc_size(k - prev - 1, b->mb[k]);
373 if (b->next[k] >= mb_area_start[a + 1] && b->next[k] < 64) {
374 for (a2 = a + 1; b->next[k] >= mb_area_start[a2 + 1]; a2++)
377 assert(b->mb[b->next[k]]);
378 b->bit_size[a2] += dv_rl2vlc_size(b->next[k] - prev - 1, b->mb[b->next[k]]) -
379 dv_rl2vlc_size(b->next[k] - k - 1, b->mb[b->next[k]]);
380 assert(b->prev[a2] == k && (a2 + 1 >= 4 || b->prev[a2 + 1] != k));
383 b->next[prev] = b->next[k];
386 b->prev[a + 1] = prev;
388 size[i] += b->bit_size[a];
391 if (vs_total_ac_bits >= size[0] + size[1] + size[2] + size[3] + size[4])
394 } while (qnos[0] | qnos[1] | qnos[2] | qnos[3] | qnos[4]);
396 for (a = 2; a == 2 || vs_total_ac_bits < size[0]; a += a) {
398 size[0] = 5 * 6 * 4; // EOB
399 for (j = 0; j < 6 * 5; j++, b++) {
401 for (k = b->next[prev]; k < 64; k = b->next[k]) {
402 if (b->mb[k] < a && b->mb[k] > -a) {
403 b->next[prev] = b->next[k];
405 size[0] += dv_rl2vlc_size(k - prev - 1, b->mb[k]);
413 static int dv_encode_video_segment(AVCodecContext *avctx, void *arg)
415 DVVideoContext *s = avctx->priv_data;
416 DVwork_chunk *work_chunk = arg;
418 int mb_x, mb_y, c_offset, linesize, y_stride;
421 LOCAL_ALIGNED_8(uint8_t, scratch, [128]);
422 EncBlockInfo enc_blks[5 * DV_MAX_BPM];
423 PutBitContext pbs[5 * DV_MAX_BPM];
425 EncBlockInfo *enc_blk;
427 int qnos[5] = { 15, 15, 15, 15, 15 }; /* No quantization */
428 int *qnosp = &qnos[0];
430 dif = &s->buf[work_chunk->buf_offset * 80];
431 enc_blk = &enc_blks[0];
432 for (mb_index = 0; mb_index < 5; mb_index++) {
433 dv_calculate_mb_xy(s, work_chunk, mb_index, &mb_x, &mb_y);
435 /* initializing luminance blocks */
436 if ((s->sys->pix_fmt == AV_PIX_FMT_YUV420P) ||
437 (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) ||
438 (s->sys->height >= 720 && mb_y != 134)) {
439 y_stride = s->frame->linesize[0] << 3;
443 y_ptr = s->frame->data[0] +
444 ((mb_y * s->frame->linesize[0] + mb_x) << 3);
445 linesize = s->frame->linesize[0];
447 if (s->sys->video_stype == 4) { /* SD 422 */
449 dv_init_enc_block(enc_blk + 0, y_ptr, linesize, s, 0) +
450 dv_init_enc_block(enc_blk + 1, NULL, linesize, s, 0) +
451 dv_init_enc_block(enc_blk + 2, y_ptr + 8, linesize, s, 0) +
452 dv_init_enc_block(enc_blk + 3, NULL, linesize, s, 0);
455 dv_init_enc_block(enc_blk + 0, y_ptr, linesize, s, 0) +
456 dv_init_enc_block(enc_blk + 1, y_ptr + 8, linesize, s, 0) +
457 dv_init_enc_block(enc_blk + 2, y_ptr + y_stride, linesize, s, 0) +
458 dv_init_enc_block(enc_blk + 3, y_ptr + 8 + y_stride, linesize, s, 0);
462 /* initializing chrominance blocks */
463 c_offset = (((mb_y >> (s->sys->pix_fmt == AV_PIX_FMT_YUV420P)) * s->frame->linesize[1] +
464 (mb_x >> ((s->sys->pix_fmt == AV_PIX_FMT_YUV411P) ? 2 : 1))) << 3);
465 for (j = 2; j; j--) {
466 uint8_t *c_ptr = s->frame->data[j] + c_offset;
467 linesize = s->frame->linesize[j];
468 y_stride = (mb_y == 134) ? 8 : (s->frame->linesize[j] << 3);
469 if (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) {
471 uint8_t *b = scratch;
472 for (i = 0; i < 8; i++) {
473 d = c_ptr + (linesize << 3);
489 vs_bit_size += dv_init_enc_block(enc_blk++, c_ptr, linesize, s, 1);
490 if (s->sys->bpm == 8)
491 vs_bit_size += dv_init_enc_block(enc_blk++, c_ptr + y_stride,
496 if (vs_total_ac_bits < vs_bit_size)
497 dv_guess_qnos(&enc_blks[0], qnosp);
499 /* DIF encoding process */
500 for (j = 0; j < 5 * s->sys->bpm;) {
506 /* First pass over individual cells only */
507 for (i = 0; i < s->sys->bpm; i++, j++) {
508 int sz = s->sys->block_sizes[i] >> 3;
510 init_put_bits(&pbs[j], dif, sz);
511 put_sbits(&pbs[j], 9, ((enc_blks[j].mb[0] >> 3) - 1024 + 2) >> 2);
512 put_bits(&pbs[j], 1, enc_blks[j].dct_mode);
513 put_bits(&pbs[j], 2, enc_blks[j].cno);
515 dv_encode_ac(&enc_blks[j], &pbs[j], &pbs[j + 1]);
519 /* Second pass over each MB space */
521 for (i = 0; i < s->sys->bpm; i++)
522 if (enc_blks[start_mb + i].partial_bit_count)
523 pb = dv_encode_ac(&enc_blks[start_mb + i], pb,
524 &pbs[start_mb + s->sys->bpm]);
527 /* Third and final pass over the whole video segment space */
529 for (j = 0; j < 5 * s->sys->bpm; j++) {
530 if (enc_blks[j].partial_bit_count)
531 pb = dv_encode_ac(&enc_blks[j], pb, &pbs[s->sys->bpm * 5]);
532 if (enc_blks[j].partial_bit_count)
533 av_log(avctx, AV_LOG_ERROR, "ac bitstream overflow\n");
536 for (j = 0; j < 5 * s->sys->bpm; j++) {
538 int size = pbs[j].size_in_bits >> 3;
539 flush_put_bits(&pbs[j]);
540 pos = put_bits_count(&pbs[j]) >> 3;
542 av_log(avctx, AV_LOG_ERROR,
543 "bitstream written beyond buffer size\n");
546 memset(pbs[j].buf + pos, 0xff, size - pos);
552 static inline int dv_write_pack(enum dv_pack_type pack_id, DVVideoContext *c,
556 * Here's what SMPTE314M says about these two:
557 * (page 6) APTn, AP1n, AP2n, AP3n: These data shall be identical
558 * as track application IDs (APTn = 001, AP1n =
559 * 001, AP2n = 001, AP3n = 001), if the source signal
560 * comes from a digital VCR. If the signal source is
561 * unknown, all bits for these data shall be set to 1.
562 * (page 12) STYPE: STYPE defines a signal type of video signal
563 * 00000b = 4:1:1 compression
564 * 00100b = 4:2:2 compression
566 * Now, I've got two problems with these statements:
567 * 1. it looks like APT == 111b should be a safe bet, but it isn't.
568 * It seems that for PAL as defined in IEC 61834 we have to set
569 * APT to 000 and for SMPTE314M to 001.
570 * 2. It is not at all clear what STYPE is used for 4:2:0 PAL
571 * compression scheme (if any).
573 int apt = (c->sys->pix_fmt == AV_PIX_FMT_YUV420P ? 0 : 1);
576 if ((int) (av_q2d(c->avctx->sample_aspect_ratio) *
577 c->avctx->width / c->avctx->height * 10) >= 17) /* 16:9 */
580 buf[0] = (uint8_t) pack_id;
582 case dv_header525: /* I can't imagine why these two weren't defined as real */
583 case dv_header625: /* packs in SMPTE314M -- they definitely look like ones */
584 buf[1] = 0xf8 | /* reserved -- always 1 */
585 (apt & 0x07); /* APT: Track application ID */
586 buf[2] = (0 << 7) | /* TF1: audio data is 0 - valid; 1 - invalid */
587 (0x0f << 3) | /* reserved -- always 1 */
588 (apt & 0x07); /* AP1: Audio application ID */
589 buf[3] = (0 << 7) | /* TF2: video data is 0 - valid; 1 - invalid */
590 (0x0f << 3) | /* reserved -- always 1 */
591 (apt & 0x07); /* AP2: Video application ID */
592 buf[4] = (0 << 7) | /* TF3: subcode(SSYB) is 0 - valid; 1 - invalid */
593 (0x0f << 3) | /* reserved -- always 1 */
594 (apt & 0x07); /* AP3: Subcode application ID */
596 case dv_video_source:
597 buf[1] = 0xff; /* reserved -- always 1 */
598 buf[2] = (1 << 7) | /* B/W: 0 - b/w, 1 - color */
599 (1 << 6) | /* following CLF is valid - 0, invalid - 1 */
600 (3 << 4) | /* CLF: color frames ID (see ITU-R BT.470-4) */
601 0xf; /* reserved -- always 1 */
602 buf[3] = (3 << 6) | /* reserved -- always 1 */
603 (c->sys->dsf << 5) | /* system: 60fields/50fields */
604 c->sys->video_stype; /* signal type video compression */
605 buf[4] = 0xff; /* VISC: 0xff -- no information */
607 case dv_video_control:
608 buf[1] = (0 << 6) | /* Copy generation management (CGMS) 0 -- free */
609 0x3f; /* reserved -- always 1 */
610 buf[2] = 0xc8 | /* reserved -- always b11001xxx */
612 buf[3] = (1 << 7) | /* frame/field flag 1 -- frame, 0 -- field */
613 (1 << 6) | /* first/second field flag 0 -- field 2, 1 -- field 1 */
614 (1 << 5) | /* frame change flag 0 -- same picture as before, 1 -- different */
615 (1 << 4) | /* 1 - interlaced, 0 - noninterlaced */
616 0xc; /* reserved -- always b1100 */
617 buf[4] = 0xff; /* reserved -- always 1 */
628 static inline int dv_write_dif_id(enum dv_section_type t, uint8_t chan_num,
629 uint8_t seq_num, uint8_t dif_num,
632 buf[0] = (uint8_t) t; /* Section type */
633 buf[1] = (seq_num << 4) | /* DIF seq number 0-9 for 525/60; 0-11 for 625/50 */
634 (chan_num << 3) | /* FSC: for 50Mb/s 0 - first channel; 1 - second */
635 7; /* reserved -- always 1 */
636 buf[2] = dif_num; /* DIF block number Video: 0-134, Audio: 0-8 */
640 static inline int dv_write_ssyb_id(uint8_t syb_num, uint8_t fr, uint8_t *buf)
642 if (syb_num == 0 || syb_num == 6) {
643 buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
644 (0 << 4) | /* AP3 (Subcode application ID) */
645 0x0f; /* reserved -- always 1 */
646 } else if (syb_num == 11) {
647 buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
648 0x7f; /* reserved -- always 1 */
650 buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
651 (0 << 4) | /* APT (Track application ID) */
652 0x0f; /* reserved -- always 1 */
654 buf[1] = 0xf0 | /* reserved -- always 1 */
655 (syb_num & 0x0f); /* SSYB number 0 - 11 */
656 buf[2] = 0xff; /* reserved -- always 1 */
660 static void dv_format_frame(DVVideoContext *c, uint8_t *buf)
664 for (chan = 0; chan < c->sys->n_difchan; chan++) {
665 for (i = 0; i < c->sys->difseg_size; i++) {
666 memset(buf, 0xff, 80 * 6); /* first 6 DIF blocks are for control data */
668 /* DV header: 1DIF */
669 buf += dv_write_dif_id(dv_sect_header, chan, i, 0, buf);
670 buf += dv_write_pack((c->sys->dsf ? dv_header625 : dv_header525),
672 buf += 72; /* unused bytes */
674 /* DV subcode: 2DIFs */
675 for (j = 0; j < 2; j++) {
676 buf += dv_write_dif_id(dv_sect_subcode, chan, i, j, buf);
677 for (k = 0; k < 6; k++)
678 buf += dv_write_ssyb_id(k, (i < c->sys->difseg_size / 2), buf) + 5;
679 buf += 29; /* unused bytes */
683 for (j = 0; j < 3; j++) {
684 buf += dv_write_dif_id(dv_sect_vaux, chan, i, j, buf);
685 buf += dv_write_pack(dv_video_source, c, buf);
686 buf += dv_write_pack(dv_video_control, c, buf);
688 buf += dv_write_pack(dv_video_source, c, buf);
689 buf += dv_write_pack(dv_video_control, c, buf);
690 buf += 4 * 5 + 2; /* unused bytes */
693 /* DV Audio/Video: 135 Video DIFs + 9 Audio DIFs */
694 for (j = 0; j < 135; j++) {
696 memset(buf, 0xff, 80);
697 buf += dv_write_dif_id(dv_sect_audio, chan, i, j / 15, buf);
698 buf += 77; /* audio control & shuffled PCM audio */
700 buf += dv_write_dif_id(dv_sect_video, chan, i, j, buf);
701 buf += 77; /* 1 video macroblock: 1 bytes control
702 * 4 * 14 bytes Y 8x8 data
703 * 10 bytes Cr 8x8 data
704 * 10 bytes Cb 8x8 data */
710 static int dvvideo_encode_frame(AVCodecContext *c, AVPacket *pkt,
711 const AVFrame *frame, int *got_packet)
713 DVVideoContext *s = c->priv_data;
716 if ((ret = ff_alloc_packet(pkt, s->sys->frame_size)) < 0) {
717 av_log(c, AV_LOG_ERROR, "Error getting output packet.\n");
721 c->pix_fmt = s->sys->pix_fmt;
723 c->coded_frame->key_frame = 1;
724 c->coded_frame->pict_type = AV_PICTURE_TYPE_I;
727 c->execute(c, dv_encode_video_segment, s->work_chunks, NULL,
728 dv_work_pool_size(s->sys), sizeof(DVwork_chunk));
732 dv_format_frame(s, pkt->data);
734 pkt->flags |= AV_PKT_FLAG_KEY;
740 static int dvvideo_encode_close(AVCodecContext *avctx)
742 av_frame_free(&avctx->coded_frame);
746 AVCodec ff_dvvideo_encoder = {
748 .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"),
749 .type = AVMEDIA_TYPE_VIDEO,
750 .id = AV_CODEC_ID_DVVIDEO,
751 .priv_data_size = sizeof(DVVideoContext),
752 .init = dvvideo_encode_init,
753 .encode2 = dvvideo_encode_frame,
754 .close = dvvideo_encode_close,
755 .capabilities = CODEC_CAP_SLICE_THREADS,
756 .pix_fmts = (const enum AVPixelFormat[]) {
757 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV422P,
758 AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE