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"
34 #include "pixblockdsp.h"
37 #include "dv_tablegen.h"
38 #include "dv_profile_internal.h"
40 static av_cold int dvvideo_encode_init(AVCodecContext *avctx)
42 DVVideoContext *s = avctx->priv_data;
45 PixblockDSPContext pdsp;
48 s->sys = avpriv_dv_codec_profile(avctx);
50 av_log(avctx, AV_LOG_ERROR, "Found no DV profile for %ix%i %s video. "
51 "Valid DV profiles are:\n",
52 avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt));
53 ff_dv_print_profiles(avctx, AV_LOG_ERROR);
54 return AVERROR(EINVAL);
56 ret = ff_dv_init_dynamic_tables(s, s->sys);
58 av_log(avctx, AV_LOG_ERROR, "Error initializing work tables.\n");
62 avctx->coded_frame = av_frame_alloc();
63 if (!avctx->coded_frame)
64 return AVERROR(ENOMEM);
66 dv_vlc_map_tableinit();
68 ff_dsputil_init(&dsp, avctx);
69 ff_fdctdsp_init(&fdsp, avctx);
70 ff_pixblockdsp_init(&pdsp, avctx);
71 ff_set_cmp(&dsp, dsp.ildct_cmp, avctx->ildct_cmp);
73 s->get_pixels = pdsp.get_pixels;
74 s->ildct_cmp = dsp.ildct_cmp[5];
76 s->fdct[0] = fdsp.fdct;
77 s->fdct[1] = fdsp.fdct248;
79 return ff_dvvideo_init(avctx);
82 /* bit budget for AC only in 5 MBs */
83 static const int vs_total_ac_bits = (100 * 4 + 68*2) * 5;
84 static const int mb_area_start[5] = { 1, 6, 21, 43, 64 };
87 /* Converts run and level (where level != 0) pair into VLC, returning bit size */
88 static av_always_inline int dv_rl2vlc(int run, int level, int sign, uint32_t* vlc)
91 if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
92 *vlc = dv_vlc_map[run][level].vlc | sign;
93 size = dv_vlc_map[run][level].size;
96 if (level < DV_VLC_MAP_LEV_SIZE) {
97 *vlc = dv_vlc_map[0][level].vlc | sign;
98 size = dv_vlc_map[0][level].size;
100 *vlc = 0xfe00 | (level << 1) | sign;
104 *vlc |= ((run < 16) ? dv_vlc_map[run-1][0].vlc :
105 (0x1f80 | (run - 1))) << size;
106 size += (run < 16) ? dv_vlc_map[run-1][0].size : 13;
113 static av_always_inline int dv_rl2vlc_size(int run, int level)
117 if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
118 size = dv_vlc_map[run][level].size;
121 size = (level < DV_VLC_MAP_LEV_SIZE) ? dv_vlc_map[0][level].size : 16;
123 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 = bi->partial_bit_buffer = 0;
166 /* Find suitable storage space */
167 for (; size > (bits_left = put_bits_left(pb)); pb++) {
170 put_bits(pb, bits_left, vlc >> size);
171 vlc = vlc & ((1 << size) - 1);
173 if (pb + 1 >= pb_end) {
174 bi->partial_bit_count = size;
175 bi->partial_bit_buffer = vlc;
181 put_bits(pb, size, vlc);
183 if (bi->cur_ac >= 64)
186 /* Construct the next VLC */
188 bi->cur_ac = bi->next[prev];
189 if (bi->cur_ac < 64){
190 size = dv_rl2vlc(bi->cur_ac - prev - 1, bi->mb[bi->cur_ac], bi->sign[bi->cur_ac], &vlc);
192 size = 4; vlc = 6; /* End Of Block stamp */
198 static av_always_inline int dv_guess_dct_mode(DVVideoContext *s, uint8_t *data, int linesize) {
199 if (s->avctx->flags & CODEC_FLAG_INTERLACED_DCT) {
200 int ps = s->ildct_cmp(NULL, data, NULL, linesize, 8) - 400;
202 int is = s->ildct_cmp(NULL, data , NULL, linesize<<1, 4) +
203 s->ildct_cmp(NULL, data + linesize, NULL, linesize<<1, 4);
211 static const int dv_weight_bits = 18;
212 static const int dv_weight_88[64] = {
213 131072, 257107, 257107, 242189, 252167, 242189, 235923, 237536,
214 237536, 235923, 229376, 231390, 223754, 231390, 229376, 222935,
215 224969, 217965, 217965, 224969, 222935, 200636, 218652, 211916,
216 212325, 211916, 218652, 200636, 188995, 196781, 205965, 206433,
217 206433, 205965, 196781, 188995, 185364, 185364, 200636, 200704,
218 200636, 185364, 185364, 174609, 180568, 195068, 195068, 180568,
219 174609, 170091, 175557, 189591, 175557, 170091, 165371, 170627,
220 170627, 165371, 160727, 153560, 160727, 144651, 144651, 136258,
222 static const int dv_weight_248[64] = {
223 131072, 242189, 257107, 237536, 229376, 200636, 242189, 223754,
224 224969, 196781, 262144, 242189, 229376, 200636, 257107, 237536,
225 211916, 185364, 235923, 217965, 229376, 211916, 206433, 180568,
226 242189, 223754, 224969, 196781, 211916, 185364, 235923, 217965,
227 200704, 175557, 222935, 205965, 200636, 185364, 195068, 170627,
228 229376, 211916, 206433, 180568, 200704, 175557, 222935, 205965,
229 175557, 153560, 188995, 174609, 165371, 144651, 200636, 185364,
230 195068, 170627, 175557, 153560, 188995, 174609, 165371, 144651,
233 static av_always_inline int dv_init_enc_block(EncBlockInfo* bi, uint8_t *data, int linesize, DVVideoContext *s, int bias)
236 const uint8_t* zigzag_scan;
237 LOCAL_ALIGNED_16(int16_t, blk, [64]);
239 /* We offer two different methods for class number assignment: the
240 method suggested in SMPTE 314M Table 22, and an improved
241 method. The SMPTE method is very conservative; it assigns class
242 3 (i.e. severe quantization) to any block where the largest AC
243 component is greater than 36. Libav's DV encoder tracks AC bit
244 consumption precisely, so there is no need to bias most blocks
245 towards strongly lossy compression. Instead, we assign class 2
246 to most blocks, and use class 3 only when strictly necessary
247 (for blocks whose largest AC component exceeds 255). */
249 #if 0 /* SMPTE spec method */
250 static const int classes[] = {12, 24, 36, 0xffff};
251 #else /* improved Libav method */
252 static const int classes[] = {-1, -1, 255, 0xffff};
254 int max = classes[0];
257 assert((((int)blk) & 15) == 0);
259 bi->area_q[0] = bi->area_q[1] = bi->area_q[2] = bi->area_q[3] = 0;
260 bi->partial_bit_count = 0;
261 bi->partial_bit_buffer = 0;
264 bi->dct_mode = dv_guess_dct_mode(s, data, linesize);
265 s->get_pixels(blk, data, linesize);
266 s->fdct[bi->dct_mode](blk);
268 /* We rely on the fact that encoding all zeros leads to an immediate EOB,
269 which is precisely what the spec calls for in the "dummy" blocks. */
270 memset(blk, 0, 64*sizeof(*blk));
275 zigzag_scan = bi->dct_mode ? ff_dv_zigzag248_direct : ff_zigzag_direct;
276 weight = bi->dct_mode ? dv_weight_248 : dv_weight_88;
278 for (area = 0; area < 4; area++) {
279 bi->prev[area] = prev;
280 bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :)
281 for (i = mb_area_start[area]; i < mb_area_start[area+1]; i++) {
282 int level = blk[zigzag_scan[i]];
284 if (level + 15 > 30U) {
285 bi->sign[i] = (level >> 31) & 1;
286 /* weight it and and shift down into range, adding for rounding */
287 /* the extra division by a factor of 2^4 reverses the 8x expansion of the DCT
288 AND the 2x doubling of the weights */
289 level = (FFABS(level) * weight[i] + (1 << (dv_weight_bits+3))) >> (dv_weight_bits+4);
293 bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, level);
300 for (bi->cno = 0; max > classes[bi->cno]; bi->cno++);
308 for (area = 0; area < 4; area++) {
309 bi->prev[area] = prev;
310 bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :)
311 for (; i < mb_area_start[area+1]; i = bi->next[i]) {
315 bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, bi->mb[i]);
324 return bi->bit_size[0] + bi->bit_size[1] + bi->bit_size[2] + bi->bit_size[3];
327 static inline void dv_guess_qnos(EncBlockInfo* blks, int* qnos)
330 int i, j, k, a, prev, a2;
333 size[0] = size[1] = size[2] = size[3] = size[4] = 1 << 24;
336 for (i = 0; i < 5; i++) {
342 for (j = 0; j < 6; j++, b++) {
343 for (a = 0; a < 4; a++) {
344 if (b->area_q[a] != ff_dv_quant_shifts[qnos[i] + ff_dv_quant_offset[b->cno]][a]) {
345 b->bit_size[a] = 1; // 4 areas 4 bits for EOB :)
348 assert(b->next[prev] >= mb_area_start[a+1] || b->mb[prev]);
349 for (k = b->next[prev] ; k < mb_area_start[a+1]; k = b->next[k]) {
352 b->bit_size[a] += dv_rl2vlc_size(k - prev - 1, b->mb[k]);
355 if (b->next[k] >= mb_area_start[a+1] && b->next[k]<64){
356 for (a2 = a + 1; b->next[k] >= mb_area_start[a2+1]; a2++)
359 assert(b->mb[b->next[k]]);
360 b->bit_size[a2] += dv_rl2vlc_size(b->next[k] - prev - 1, b->mb[b->next[k]])
361 -dv_rl2vlc_size(b->next[k] - k - 1, b->mb[b->next[k]]);
362 assert(b->prev[a2] == k && (a2 + 1 >= 4 || b->prev[a2+1] != k));
365 b->next[prev] = b->next[k];
370 size[i] += b->bit_size[a];
373 if (vs_total_ac_bits >= size[0] + size[1] + size[2] + size[3] + size[4])
376 } while (qnos[0]|qnos[1]|qnos[2]|qnos[3]|qnos[4]);
379 for (a = 2; a == 2 || vs_total_ac_bits < size[0]; a += a){
381 size[0] = 5 * 6 * 4; //EOB
382 for (j = 0; j < 6 *5; j++, b++) {
384 for (k = b->next[prev]; k < 64; k = b->next[k]) {
385 if (b->mb[k] < a && b->mb[k] > -a){
386 b->next[prev] = b->next[k];
388 size[0] += dv_rl2vlc_size(k - prev - 1, b->mb[k]);
396 static int dv_encode_video_segment(AVCodecContext *avctx, void *arg)
398 DVVideoContext *s = avctx->priv_data;
399 DVwork_chunk *work_chunk = arg;
401 int mb_x, mb_y, c_offset, linesize, y_stride;
404 LOCAL_ALIGNED_8(uint8_t, scratch, [128]);
405 EncBlockInfo enc_blks[5*DV_MAX_BPM];
406 PutBitContext pbs[5*DV_MAX_BPM];
408 EncBlockInfo* enc_blk;
410 int qnos[5] = {15, 15, 15, 15, 15}; /* No quantization */
411 int* qnosp = &qnos[0];
413 dif = &s->buf[work_chunk->buf_offset*80];
414 enc_blk = &enc_blks[0];
415 for (mb_index = 0; mb_index < 5; mb_index++) {
416 dv_calculate_mb_xy(s, work_chunk, mb_index, &mb_x, &mb_y);
418 /* initializing luminance blocks */
419 if ((s->sys->pix_fmt == AV_PIX_FMT_YUV420P) ||
420 (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) ||
421 (s->sys->height >= 720 && mb_y != 134)) {
422 y_stride = s->frame->linesize[0] << 3;
426 y_ptr = s->frame->data[0] + ((mb_y * s->frame->linesize[0] + mb_x) << 3);
427 linesize = s->frame->linesize[0];
429 if (s->sys->video_stype == 4) { /* SD 422 */
431 dv_init_enc_block(enc_blk+0, y_ptr , linesize, s, 0) +
432 dv_init_enc_block(enc_blk+1, NULL , linesize, s, 0) +
433 dv_init_enc_block(enc_blk+2, y_ptr + 8 , linesize, s, 0) +
434 dv_init_enc_block(enc_blk+3, NULL , linesize, s, 0);
437 dv_init_enc_block(enc_blk+0, y_ptr , linesize, s, 0) +
438 dv_init_enc_block(enc_blk+1, y_ptr + 8 , linesize, s, 0) +
439 dv_init_enc_block(enc_blk+2, y_ptr + y_stride, linesize, s, 0) +
440 dv_init_enc_block(enc_blk+3, y_ptr + 8 + y_stride, linesize, s, 0);
444 /* initializing chrominance blocks */
445 c_offset = (((mb_y >> (s->sys->pix_fmt == AV_PIX_FMT_YUV420P)) * s->frame->linesize[1] +
446 (mb_x >> ((s->sys->pix_fmt == AV_PIX_FMT_YUV411P) ? 2 : 1))) << 3);
447 for (j = 2; j; j--) {
448 uint8_t *c_ptr = s->frame->data[j] + c_offset;
449 linesize = s->frame->linesize[j];
450 y_stride = (mb_y == 134) ? 8 : (s->frame->linesize[j] << 3);
451 if (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) {
453 uint8_t* b = scratch;
454 for (i = 0; i < 8; i++) {
455 d = c_ptr + (linesize << 3);
456 b[0] = c_ptr[0]; b[1] = c_ptr[1]; b[2] = c_ptr[2]; b[3] = c_ptr[3];
457 b[4] = d[0]; b[5] = d[1]; b[6] = d[2]; b[7] = d[3];
465 vs_bit_size += dv_init_enc_block( enc_blk++, c_ptr , linesize, s, 1);
466 if (s->sys->bpm == 8) {
467 vs_bit_size += dv_init_enc_block(enc_blk++, c_ptr + y_stride, linesize, s, 1);
472 if (vs_total_ac_bits < vs_bit_size)
473 dv_guess_qnos(&enc_blks[0], qnosp);
475 /* DIF encoding process */
476 for (j=0; j<5*s->sys->bpm;) {
482 /* First pass over individual cells only */
483 for (i=0; i<s->sys->bpm; i++, j++) {
484 int sz = s->sys->block_sizes[i]>>3;
486 init_put_bits(&pbs[j], dif, sz);
487 put_sbits(&pbs[j], 9, ((enc_blks[j].mb[0] >> 3) - 1024 + 2) >> 2);
488 put_bits(&pbs[j], 1, enc_blks[j].dct_mode);
489 put_bits(&pbs[j], 2, enc_blks[j].cno);
491 dv_encode_ac(&enc_blks[j], &pbs[j], &pbs[j+1]);
495 /* Second pass over each MB space */
497 for (i=0; i<s->sys->bpm; i++) {
498 if (enc_blks[start_mb+i].partial_bit_count)
499 pb = dv_encode_ac(&enc_blks[start_mb+i], pb, &pbs[start_mb+s->sys->bpm]);
503 /* Third and final pass over the whole video segment space */
505 for (j=0; j<5*s->sys->bpm; j++) {
506 if (enc_blks[j].partial_bit_count)
507 pb = dv_encode_ac(&enc_blks[j], pb, &pbs[s->sys->bpm*5]);
508 if (enc_blks[j].partial_bit_count)
509 av_log(avctx, AV_LOG_ERROR, "ac bitstream overflow\n");
512 for (j=0; j<5*s->sys->bpm; j++) {
514 int size = pbs[j].size_in_bits >> 3;
515 flush_put_bits(&pbs[j]);
516 pos = put_bits_count(&pbs[j]) >> 3;
518 av_log(avctx, AV_LOG_ERROR, "bitstream written beyond buffer size\n");
521 memset(pbs[j].buf + pos, 0xff, size - pos);
527 static inline int dv_write_pack(enum dv_pack_type pack_id, DVVideoContext *c,
531 * Here's what SMPTE314M says about these two:
532 * (page 6) APTn, AP1n, AP2n, AP3n: These data shall be identical
533 * as track application IDs (APTn = 001, AP1n =
534 * 001, AP2n = 001, AP3n = 001), if the source signal
535 * comes from a digital VCR. If the signal source is
536 * unknown, all bits for these data shall be set to 1.
537 * (page 12) STYPE: STYPE defines a signal type of video signal
538 * 00000b = 4:1:1 compression
539 * 00100b = 4:2:2 compression
541 * Now, I've got two problems with these statements:
542 * 1. it looks like APT == 111b should be a safe bet, but it isn't.
543 * It seems that for PAL as defined in IEC 61834 we have to set
544 * APT to 000 and for SMPTE314M to 001.
545 * 2. It is not at all clear what STYPE is used for 4:2:0 PAL
546 * compression scheme (if any).
548 int apt = (c->sys->pix_fmt == AV_PIX_FMT_YUV420P ? 0 : 1);
551 if ((int)(av_q2d(c->avctx->sample_aspect_ratio) * c->avctx->width / c->avctx->height * 10) >= 17) /* 16:9 */
554 buf[0] = (uint8_t)pack_id;
556 case dv_header525: /* I can't imagine why these two weren't defined as real */
557 case dv_header625: /* packs in SMPTE314M -- they definitely look like ones */
558 buf[1] = 0xf8 | /* reserved -- always 1 */
559 (apt & 0x07); /* APT: Track application ID */
560 buf[2] = (0 << 7) | /* TF1: audio data is 0 - valid; 1 - invalid */
561 (0x0f << 3) | /* reserved -- always 1 */
562 (apt & 0x07); /* AP1: Audio application ID */
563 buf[3] = (0 << 7) | /* TF2: video data is 0 - valid; 1 - invalid */
564 (0x0f << 3) | /* reserved -- always 1 */
565 (apt & 0x07); /* AP2: Video application ID */
566 buf[4] = (0 << 7) | /* TF3: subcode(SSYB) is 0 - valid; 1 - invalid */
567 (0x0f << 3) | /* reserved -- always 1 */
568 (apt & 0x07); /* AP3: Subcode application ID */
570 case dv_video_source:
571 buf[1] = 0xff; /* reserved -- always 1 */
572 buf[2] = (1 << 7) | /* B/W: 0 - b/w, 1 - color */
573 (1 << 6) | /* following CLF is valid - 0, invalid - 1 */
574 (3 << 4) | /* CLF: color frames ID (see ITU-R BT.470-4) */
575 0xf; /* reserved -- always 1 */
576 buf[3] = (3 << 6) | /* reserved -- always 1 */
577 (c->sys->dsf << 5) | /* system: 60fields/50fields */
578 c->sys->video_stype; /* signal type video compression */
579 buf[4] = 0xff; /* VISC: 0xff -- no information */
581 case dv_video_control:
582 buf[1] = (0 << 6) | /* Copy generation management (CGMS) 0 -- free */
583 0x3f; /* reserved -- always 1 */
584 buf[2] = 0xc8 | /* reserved -- always b11001xxx */
586 buf[3] = (1 << 7) | /* frame/field flag 1 -- frame, 0 -- field */
587 (1 << 6) | /* first/second field flag 0 -- field 2, 1 -- field 1 */
588 (1 << 5) | /* frame change flag 0 -- same picture as before, 1 -- different */
589 (1 << 4) | /* 1 - interlaced, 0 - noninterlaced */
590 0xc; /* reserved -- always b1100 */
591 buf[4] = 0xff; /* reserved -- always 1 */
594 buf[1] = buf[2] = buf[3] = buf[4] = 0xff;
599 static inline int dv_write_dif_id(enum dv_section_type t, uint8_t chan_num,
600 uint8_t seq_num, uint8_t dif_num,
603 buf[0] = (uint8_t)t; /* Section type */
604 buf[1] = (seq_num << 4) | /* DIF seq number 0-9 for 525/60; 0-11 for 625/50 */
605 (chan_num << 3) | /* FSC: for 50Mb/s 0 - first channel; 1 - second */
606 7; /* reserved -- always 1 */
607 buf[2] = dif_num; /* DIF block number Video: 0-134, Audio: 0-8 */
612 static inline int dv_write_ssyb_id(uint8_t syb_num, uint8_t fr, uint8_t* buf)
614 if (syb_num == 0 || syb_num == 6) {
615 buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
616 (0 << 4) | /* AP3 (Subcode application ID) */
617 0x0f; /* reserved -- always 1 */
619 else if (syb_num == 11) {
620 buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
621 0x7f; /* reserved -- always 1 */
624 buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
625 (0 << 4) | /* APT (Track application ID) */
626 0x0f; /* reserved -- always 1 */
628 buf[1] = 0xf0 | /* reserved -- always 1 */
629 (syb_num & 0x0f); /* SSYB number 0 - 11 */
630 buf[2] = 0xff; /* reserved -- always 1 */
634 static void dv_format_frame(DVVideoContext* c, uint8_t* buf)
638 for (chan = 0; chan < c->sys->n_difchan; chan++) {
639 for (i = 0; i < c->sys->difseg_size; i++) {
640 memset(buf, 0xff, 80 * 6); /* first 6 DIF blocks are for control data */
642 /* DV header: 1DIF */
643 buf += dv_write_dif_id(dv_sect_header, chan, i, 0, buf);
644 buf += dv_write_pack((c->sys->dsf ? dv_header625 : dv_header525), c, buf);
645 buf += 72; /* unused bytes */
647 /* DV subcode: 2DIFs */
648 for (j = 0; j < 2; j++) {
649 buf += dv_write_dif_id(dv_sect_subcode, chan, i, j, buf);
650 for (k = 0; k < 6; k++)
651 buf += dv_write_ssyb_id(k, (i < c->sys->difseg_size/2), buf) + 5;
652 buf += 29; /* unused bytes */
656 for (j = 0; j < 3; j++) {
657 buf += dv_write_dif_id(dv_sect_vaux, chan, i, j, buf);
658 buf += dv_write_pack(dv_video_source, c, buf);
659 buf += dv_write_pack(dv_video_control, c, buf);
661 buf += dv_write_pack(dv_video_source, c, buf);
662 buf += dv_write_pack(dv_video_control, c, buf);
663 buf += 4*5 + 2; /* unused bytes */
666 /* DV Audio/Video: 135 Video DIFs + 9 Audio DIFs */
667 for (j = 0; j < 135; j++) {
669 memset(buf, 0xff, 80);
670 buf += dv_write_dif_id(dv_sect_audio, chan, i, j/15, buf);
671 buf += 77; /* audio control & shuffled PCM audio */
673 buf += dv_write_dif_id(dv_sect_video, chan, i, j, buf);
674 buf += 77; /* 1 video macroblock: 1 bytes control
675 4 * 14 bytes Y 8x8 data
677 10 bytes Cb 8x8 data */
684 static int dvvideo_encode_frame(AVCodecContext *c, AVPacket *pkt,
685 const AVFrame *frame, int *got_packet)
687 DVVideoContext *s = c->priv_data;
690 if ((ret = ff_alloc_packet(pkt, s->sys->frame_size)) < 0) {
691 av_log(c, AV_LOG_ERROR, "Error getting output packet.\n");
695 c->pix_fmt = s->sys->pix_fmt;
697 c->coded_frame->key_frame = 1;
698 c->coded_frame->pict_type = AV_PICTURE_TYPE_I;
701 c->execute(c, dv_encode_video_segment, s->work_chunks, NULL,
702 dv_work_pool_size(s->sys), sizeof(DVwork_chunk));
706 dv_format_frame(s, pkt->data);
708 pkt->flags |= AV_PKT_FLAG_KEY;
714 static int dvvideo_encode_close(AVCodecContext *avctx)
716 av_frame_free(&avctx->coded_frame);
720 AVCodec ff_dvvideo_encoder = {
722 .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"),
723 .type = AVMEDIA_TYPE_VIDEO,
724 .id = AV_CODEC_ID_DVVIDEO,
725 .priv_data_size = sizeof(DVVideoContext),
726 .init = dvvideo_encode_init,
727 .encode2 = dvvideo_encode_frame,
728 .close = dvvideo_encode_close,
729 .capabilities = CODEC_CAP_SLICE_THREADS,
730 .pix_fmts = (const enum AVPixelFormat[]) {
731 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE