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
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 if (avctx->height > 576) {
57 av_log(avctx, AV_LOG_ERROR, "DVCPRO HD encoding is not supported.\n");
58 return AVERROR_PATCHWELCOME;
60 ret = ff_dv_init_dynamic_tables(s, s->sys);
62 av_log(avctx, AV_LOG_ERROR, "Error initializing work tables.\n");
66 avctx->coded_frame = av_frame_alloc();
67 if (!avctx->coded_frame)
68 return AVERROR(ENOMEM);
70 dv_vlc_map_tableinit();
72 memset(&mecc,0, sizeof(mecc));
73 ff_fdctdsp_init(&fdsp, avctx);
74 ff_me_cmp_init(&mecc, avctx);
75 ff_pixblockdsp_init(&pdsp, avctx);
76 ff_set_cmp(&mecc, mecc.ildct_cmp, avctx->ildct_cmp);
78 s->get_pixels = pdsp.get_pixels;
79 s->ildct_cmp = mecc.ildct_cmp[5];
81 s->fdct[0] = fdsp.fdct;
82 s->fdct[1] = fdsp.fdct248;
84 return ff_dvvideo_init(avctx);
87 /* bit budget for AC only in 5 MBs */
88 static const int vs_total_ac_bits = (100 * 4 + 68*2) * 5;
89 static const int mb_area_start[5] = { 1, 6, 21, 43, 64 };
92 /* Converts run and level (where level != 0) pair into VLC, returning bit size */
93 static av_always_inline int dv_rl2vlc(int run, int level, int sign, uint32_t* vlc)
96 if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
97 *vlc = dv_vlc_map[run][level].vlc | sign;
98 size = dv_vlc_map[run][level].size;
101 if (level < DV_VLC_MAP_LEV_SIZE) {
102 *vlc = dv_vlc_map[0][level].vlc | sign;
103 size = dv_vlc_map[0][level].size;
105 *vlc = 0xfe00 | (level << 1) | sign;
109 *vlc |= ((run < 16) ? dv_vlc_map[run-1][0].vlc :
110 (0x1f80 | (run - 1))) << size;
111 size += (run < 16) ? dv_vlc_map[run-1][0].size : 13;
118 static av_always_inline int dv_rl2vlc_size(int run, int level)
122 if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
123 size = dv_vlc_map[run][level].size;
126 size = (level < DV_VLC_MAP_LEV_SIZE) ? dv_vlc_map[0][level].size : 16;
128 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 = bi->partial_bit_buffer = 0;
171 /* Find suitable storage space */
172 for (; size > (bits_left = put_bits_left(pb)); pb++) {
175 put_bits(pb, bits_left, vlc >> size);
176 vlc = vlc & ((1 << size) - 1);
178 if (pb + 1 >= pb_end) {
179 bi->partial_bit_count = size;
180 bi->partial_bit_buffer = vlc;
186 put_bits(pb, size, vlc);
188 if (bi->cur_ac >= 64)
191 /* Construct the next VLC */
193 bi->cur_ac = bi->next[prev];
194 if (bi->cur_ac < 64){
195 size = dv_rl2vlc(bi->cur_ac - prev - 1, bi->mb[bi->cur_ac], bi->sign[bi->cur_ac], &vlc);
197 size = 4; vlc = 6; /* End Of Block stamp */
203 static av_always_inline int dv_guess_dct_mode(DVVideoContext *s, uint8_t *data, int linesize) {
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, int linesize, DVVideoContext *s, int bias)
241 const uint8_t* zigzag_scan;
242 LOCAL_ALIGNED_16(int16_t, blk, [64]);
244 /* We offer two different methods for class number assignment: the
245 method suggested in SMPTE 314M Table 22, and an improved
246 method. The SMPTE method is very conservative; it assigns class
247 3 (i.e. severe quantization) to any block where the largest AC
248 component is greater than 36. FFmpeg's DV encoder tracks AC bit
249 consumption precisely, so there is no need to bias most blocks
250 towards strongly lossy compression. Instead, we assign class 2
251 to most blocks, and use class 3 only when strictly necessary
252 (for blocks whose largest AC component exceeds 255). */
254 #if 0 /* SMPTE spec method */
255 static const int classes[] = {12, 24, 36, 0xffff};
256 #else /* improved FFmpeg method */
257 static const int classes[] = {-1, -1, 255, 0xffff};
259 int max = classes[0];
262 av_assert2((((int)blk) & 15) == 0);
264 bi->area_q[0] = bi->area_q[1] = bi->area_q[2] = bi->area_q[3] = 0;
265 bi->partial_bit_count = 0;
266 bi->partial_bit_buffer = 0;
269 bi->dct_mode = dv_guess_dct_mode(s, data, linesize);
270 s->get_pixels(blk, data, linesize);
271 s->fdct[bi->dct_mode](blk);
273 /* We rely on the fact that encoding all zeros leads to an immediate EOB,
274 which is precisely what the spec calls for in the "dummy" blocks. */
275 memset(blk, 0, 64*sizeof(*blk));
280 zigzag_scan = bi->dct_mode ? ff_dv_zigzag248_direct : ff_zigzag_direct;
281 weight = bi->dct_mode ? dv_weight_248 : dv_weight_88;
283 for (area = 0; area < 4; area++) {
284 bi->prev[area] = prev;
285 bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :)
286 for (i = mb_area_start[area]; i < mb_area_start[area+1]; i++) {
287 int level = blk[zigzag_scan[i]];
289 if (level + 15 > 30U) {
290 bi->sign[i] = (level >> 31) & 1;
291 /* weight it and shift down into range, adding for rounding */
292 /* the extra division by a factor of 2^4 reverses the 8x expansion of the DCT
293 AND the 2x doubling of the weights */
294 level = (FFABS(level) * weight[i] + (1 << (dv_weight_bits+3))) >> (dv_weight_bits+4);
298 bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, level);
305 for (bi->cno = 0; max > classes[bi->cno]; bi->cno++);
313 for (area = 0; area < 4; area++) {
314 bi->prev[area] = prev;
315 bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :)
316 for (; i < mb_area_start[area+1]; i = bi->next[i]) {
320 bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, bi->mb[i]);
329 return bi->bit_size[0] + bi->bit_size[1] + bi->bit_size[2] + bi->bit_size[3];
332 static inline void dv_guess_qnos(EncBlockInfo* blks, int* qnos)
335 int i, j, k, a, prev, a2;
338 size[0] = size[1] = size[2] = size[3] = size[4] = 1 << 24;
341 for (i = 0; i < 5; i++) {
347 for (j = 0; j < 6; j++, b++) {
348 for (a = 0; a < 4; a++) {
349 if (b->area_q[a] != ff_dv_quant_shifts[qnos[i] + ff_dv_quant_offset[b->cno]][a]) {
350 b->bit_size[a] = 1; // 4 areas 4 bits for EOB :)
353 av_assert2(b->next[prev] >= mb_area_start[a+1] || b->mb[prev]);
354 for (k = b->next[prev] ; k < mb_area_start[a+1]; k = b->next[k]) {
357 b->bit_size[a] += dv_rl2vlc_size(k - prev - 1, b->mb[k]);
360 if (b->next[k] >= mb_area_start[a+1] && b->next[k]<64){
361 for (a2 = a + 1; b->next[k] >= mb_area_start[a2+1]; a2++)
364 av_assert2(b->mb[b->next[k]]);
365 b->bit_size[a2] += dv_rl2vlc_size(b->next[k] - prev - 1, b->mb[b->next[k]])
366 -dv_rl2vlc_size(b->next[k] - k - 1, b->mb[b->next[k]]);
367 av_assert2(b->prev[a2] == k && (a2 + 1 >= 4 || b->prev[a2+1] != k));
370 b->next[prev] = b->next[k];
375 size[i] += b->bit_size[a];
378 if (vs_total_ac_bits >= size[0] + size[1] + size[2] + size[3] + size[4])
381 } while (qnos[0]|qnos[1]|qnos[2]|qnos[3]|qnos[4]);
384 for (a = 2; a == 2 || vs_total_ac_bits < size[0]; a += a){
386 size[0] = 5 * 6 * 4; //EOB
387 for (j = 0; j < 6 *5; j++, b++) {
389 for (k = b->next[prev]; k < 64; k = b->next[k]) {
390 if (b->mb[k] < a && b->mb[k] > -a){
391 b->next[prev] = b->next[k];
393 size[0] += dv_rl2vlc_size(k - prev - 1, b->mb[k]);
401 static int dv_encode_video_segment(AVCodecContext *avctx, void *arg)
403 DVVideoContext *s = avctx->priv_data;
404 DVwork_chunk *work_chunk = arg;
406 int mb_x, mb_y, c_offset, linesize, y_stride;
409 LOCAL_ALIGNED_8(uint8_t, scratch, [128]);
410 EncBlockInfo enc_blks[5*DV_MAX_BPM];
411 PutBitContext pbs[5*DV_MAX_BPM];
413 EncBlockInfo* enc_blk;
415 int qnos[5] = {15, 15, 15, 15, 15}; /* No quantization */
416 int* qnosp = &qnos[0];
418 dif = &s->buf[work_chunk->buf_offset*80];
419 enc_blk = &enc_blks[0];
420 for (mb_index = 0; mb_index < 5; mb_index++) {
421 dv_calculate_mb_xy(s, work_chunk, mb_index, &mb_x, &mb_y);
423 /* initializing luminance blocks */
424 if ((s->sys->pix_fmt == AV_PIX_FMT_YUV420P) ||
425 (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) ||
426 (s->sys->height >= 720 && mb_y != 134)) {
427 y_stride = s->frame->linesize[0] << 3;
431 y_ptr = s->frame->data[0] + ((mb_y * s->frame->linesize[0] + mb_x) << 3);
432 linesize = s->frame->linesize[0];
434 if (s->sys->video_stype == 4) { /* SD 422 */
436 dv_init_enc_block(enc_blk+0, y_ptr , linesize, s, 0) +
437 dv_init_enc_block(enc_blk+1, NULL , linesize, s, 0) +
438 dv_init_enc_block(enc_blk+2, y_ptr + 8 , linesize, s, 0) +
439 dv_init_enc_block(enc_blk+3, NULL , linesize, s, 0);
442 dv_init_enc_block(enc_blk+0, y_ptr , linesize, s, 0) +
443 dv_init_enc_block(enc_blk+1, y_ptr + 8 , linesize, s, 0) +
444 dv_init_enc_block(enc_blk+2, y_ptr + y_stride, linesize, s, 0) +
445 dv_init_enc_block(enc_blk+3, y_ptr + 8 + y_stride, linesize, s, 0);
449 /* initializing chrominance blocks */
450 c_offset = (((mb_y >> (s->sys->pix_fmt == AV_PIX_FMT_YUV420P)) * s->frame->linesize[1] +
451 (mb_x >> ((s->sys->pix_fmt == AV_PIX_FMT_YUV411P) ? 2 : 1))) << 3);
452 for (j = 2; j; j--) {
453 uint8_t *c_ptr = s->frame->data[j] + c_offset;
454 linesize = s->frame->linesize[j];
455 y_stride = (mb_y == 134) ? 8 : (s->frame->linesize[j] << 3);
456 if (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) {
458 uint8_t* b = scratch;
459 for (i = 0; i < 8; i++) {
460 d = c_ptr + (linesize << 3);
461 b[0] = c_ptr[0]; b[1] = c_ptr[1]; b[2] = c_ptr[2]; b[3] = c_ptr[3];
462 b[4] = d[0]; b[5] = d[1]; b[6] = d[2]; b[7] = d[3];
470 vs_bit_size += dv_init_enc_block( enc_blk++, c_ptr , linesize, s, 1);
471 if (s->sys->bpm == 8) {
472 vs_bit_size += dv_init_enc_block(enc_blk++, c_ptr + y_stride, linesize, s, 1);
477 if (vs_total_ac_bits < vs_bit_size)
478 dv_guess_qnos(&enc_blks[0], qnosp);
480 /* DIF encoding process */
481 for (j=0; j<5*s->sys->bpm;) {
487 /* First pass over individual cells only */
488 for (i=0; i<s->sys->bpm; i++, j++) {
489 int sz = s->sys->block_sizes[i]>>3;
491 init_put_bits(&pbs[j], dif, sz);
492 put_sbits(&pbs[j], 9, ((enc_blks[j].mb[0] >> 3) - 1024 + 2) >> 2);
493 put_bits(&pbs[j], 1, enc_blks[j].dct_mode);
494 put_bits(&pbs[j], 2, enc_blks[j].cno);
496 dv_encode_ac(&enc_blks[j], &pbs[j], &pbs[j+1]);
500 /* Second pass over each MB space */
502 for (i=0; i<s->sys->bpm; i++) {
503 if (enc_blks[start_mb+i].partial_bit_count)
504 pb = dv_encode_ac(&enc_blks[start_mb+i], pb, &pbs[start_mb+s->sys->bpm]);
508 /* Third and final pass over the whole video segment space */
510 for (j=0; j<5*s->sys->bpm; j++) {
511 if (enc_blks[j].partial_bit_count)
512 pb = dv_encode_ac(&enc_blks[j], pb, &pbs[s->sys->bpm*5]);
513 if (enc_blks[j].partial_bit_count)
514 av_log(avctx, AV_LOG_ERROR, "ac bitstream overflow\n");
517 for (j=0; j<5*s->sys->bpm; j++) {
519 int size = pbs[j].size_in_bits >> 3;
520 flush_put_bits(&pbs[j]);
521 pos = put_bits_count(&pbs[j]) >> 3;
523 av_log(avctx, AV_LOG_ERROR, "bitstream written beyond buffer size\n");
526 memset(pbs[j].buf + pos, 0xff, size - pos);
532 static inline int dv_write_pack(enum dv_pack_type pack_id, DVVideoContext *c,
536 * Here's what SMPTE314M says about these two:
537 * (page 6) APTn, AP1n, AP2n, AP3n: These data shall be identical
538 * as track application IDs (APTn = 001, AP1n =
539 * 001, AP2n = 001, AP3n = 001), if the source signal
540 * comes from a digital VCR. If the signal source is
541 * unknown, all bits for these data shall be set to 1.
542 * (page 12) STYPE: STYPE defines a signal type of video signal
543 * 00000b = 4:1:1 compression
544 * 00100b = 4:2:2 compression
546 * Now, I've got two problems with these statements:
547 * 1. it looks like APT == 111b should be a safe bet, but it isn't.
548 * It seems that for PAL as defined in IEC 61834 we have to set
549 * APT to 000 and for SMPTE314M to 001.
550 * 2. It is not at all clear what STYPE is used for 4:2:0 PAL
551 * compression scheme (if any).
553 int apt = (c->sys->pix_fmt == AV_PIX_FMT_YUV420P ? 0 : 1);
554 int fs = c->frame->top_field_first ? 0x00 : 0x40;
557 if ((int)(av_q2d(c->avctx->sample_aspect_ratio) * c->avctx->width / c->avctx->height * 10) >= 17) /* 16:9 */
560 buf[0] = (uint8_t)pack_id;
562 case dv_header525: /* I can't imagine why these two weren't defined as real */
563 case dv_header625: /* packs in SMPTE314M -- they definitely look like ones */
564 buf[1] = 0xf8 | /* reserved -- always 1 */
565 (apt & 0x07); /* APT: Track application ID */
566 buf[2] = (0 << 7) | /* TF1: audio data is 0 - valid; 1 - invalid */
567 (0x0f << 3) | /* reserved -- always 1 */
568 (apt & 0x07); /* AP1: Audio application ID */
569 buf[3] = (0 << 7) | /* TF2: video data is 0 - valid; 1 - invalid */
570 (0x0f << 3) | /* reserved -- always 1 */
571 (apt & 0x07); /* AP2: Video application ID */
572 buf[4] = (0 << 7) | /* TF3: subcode(SSYB) is 0 - valid; 1 - invalid */
573 (0x0f << 3) | /* reserved -- always 1 */
574 (apt & 0x07); /* AP3: Subcode application ID */
576 case dv_video_source:
577 buf[1] = 0xff; /* reserved -- always 1 */
578 buf[2] = (1 << 7) | /* B/W: 0 - b/w, 1 - color */
579 (1 << 6) | /* following CLF is valid - 0, invalid - 1 */
580 (3 << 4) | /* CLF: color frames ID (see ITU-R BT.470-4) */
581 0xf; /* reserved -- always 1 */
582 buf[3] = (3 << 6) | /* reserved -- always 1 */
583 (c->sys->dsf << 5) | /* system: 60fields/50fields */
584 c->sys->video_stype; /* signal type video compression */
585 buf[4] = 0xff; /* VISC: 0xff -- no information */
587 case dv_video_control:
588 buf[1] = (0 << 6) | /* Copy generation management (CGMS) 0 -- free */
589 0x3f; /* reserved -- always 1 */
590 buf[2] = 0xc8 | /* reserved -- always b11001xxx */
592 buf[3] = (1 << 7) | /* frame/field flag 1 -- frame, 0 -- field */
593 fs | /* first/second field flag 0 -- field 2, 1 -- field 1 */
594 (1 << 5) | /* frame change flag 0 -- same picture as before, 1 -- different */
595 (1 << 4) | /* 1 - interlaced, 0 - noninterlaced */
596 0xc; /* reserved -- always b1100 */
597 buf[4] = 0xff; /* reserved -- always 1 */
600 buf[1] = buf[2] = buf[3] = buf[4] = 0xff;
605 static inline int dv_write_dif_id(enum dv_section_type t, uint8_t chan_num,
606 uint8_t seq_num, uint8_t dif_num,
609 buf[0] = (uint8_t)t; /* Section type */
610 buf[1] = (seq_num << 4) | /* DIF seq number 0-9 for 525/60; 0-11 for 625/50 */
611 (chan_num << 3) | /* FSC: for 50Mb/s 0 - first channel; 1 - second */
612 7; /* reserved -- always 1 */
613 buf[2] = dif_num; /* DIF block number Video: 0-134, Audio: 0-8 */
618 static inline int dv_write_ssyb_id(uint8_t syb_num, uint8_t fr, uint8_t* buf)
620 if (syb_num == 0 || syb_num == 6) {
621 buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
622 (0 << 4) | /* AP3 (Subcode application ID) */
623 0x0f; /* reserved -- always 1 */
625 else if (syb_num == 11) {
626 buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
627 0x7f; /* reserved -- always 1 */
630 buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
631 (0 << 4) | /* APT (Track application ID) */
632 0x0f; /* reserved -- always 1 */
634 buf[1] = 0xf0 | /* reserved -- always 1 */
635 (syb_num & 0x0f); /* SSYB number 0 - 11 */
636 buf[2] = 0xff; /* reserved -- always 1 */
640 static void dv_format_frame(DVVideoContext* c, uint8_t* buf)
644 for (chan = 0; chan < c->sys->n_difchan; chan++) {
645 for (i = 0; i < c->sys->difseg_size; i++) {
646 memset(buf, 0xff, 80 * 6); /* first 6 DIF blocks are for control data */
648 /* DV header: 1DIF */
649 buf += dv_write_dif_id(dv_sect_header, chan, i, 0, buf);
650 buf += dv_write_pack((c->sys->dsf ? dv_header625 : dv_header525), c, buf);
651 buf += 72; /* unused bytes */
653 /* DV subcode: 2DIFs */
654 for (j = 0; j < 2; j++) {
655 buf += dv_write_dif_id(dv_sect_subcode, chan, i, j, buf);
656 for (k = 0; k < 6; k++)
657 buf += dv_write_ssyb_id(k, (i < c->sys->difseg_size/2), buf) + 5;
658 buf += 29; /* unused bytes */
662 for (j = 0; j < 3; j++) {
663 buf += dv_write_dif_id(dv_sect_vaux, chan, i, j, buf);
664 buf += dv_write_pack(dv_video_source, c, buf);
665 buf += dv_write_pack(dv_video_control, c, buf);
667 buf += dv_write_pack(dv_video_source, c, buf);
668 buf += dv_write_pack(dv_video_control, c, buf);
669 buf += 4*5 + 2; /* unused bytes */
672 /* DV Audio/Video: 135 Video DIFs + 9 Audio DIFs */
673 for (j = 0; j < 135; j++) {
675 memset(buf, 0xff, 80);
676 buf += dv_write_dif_id(dv_sect_audio, chan, i, j/15, buf);
677 buf += 77; /* audio control & shuffled PCM audio */
679 buf += dv_write_dif_id(dv_sect_video, chan, i, j, buf);
680 buf += 77; /* 1 video macroblock: 1 bytes control
681 4 * 14 bytes Y 8x8 data
683 10 bytes Cb 8x8 data */
690 static int dvvideo_encode_frame(AVCodecContext *c, AVPacket *pkt,
691 const AVFrame *frame, int *got_packet)
693 DVVideoContext *s = c->priv_data;
696 if ((ret = ff_alloc_packet2(c, pkt, s->sys->frame_size)) < 0)
699 c->pix_fmt = s->sys->pix_fmt;
701 c->coded_frame->key_frame = 1;
702 c->coded_frame->pict_type = AV_PICTURE_TYPE_I;
705 c->execute(c, dv_encode_video_segment, s->work_chunks, NULL,
706 dv_work_pool_size(s->sys), sizeof(DVwork_chunk));
710 dv_format_frame(s, pkt->data);
712 pkt->flags |= AV_PKT_FLAG_KEY;
718 static int dvvideo_encode_close(AVCodecContext *avctx)
720 av_frame_free(&avctx->coded_frame);
724 AVCodec ff_dvvideo_encoder = {
726 .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"),
727 .type = AVMEDIA_TYPE_VIDEO,
728 .id = AV_CODEC_ID_DVVIDEO,
729 .priv_data_size = sizeof(DVVideoContext),
730 .init = dvvideo_encode_init,
731 .encode2 = dvvideo_encode_frame,
732 .close = dvvideo_encode_close,
733 .capabilities = CODEC_CAP_SLICE_THREADS,
734 .pix_fmts = (const enum AVPixelFormat[]) {
735 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE