3 * Copyright (c) 2002 Fabrice Bellard.
4 * Copyright (c) 2004 Roman Shaposhnik.
7 * Copyright (c) 2003 Roman Shaposhnik.
9 * Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
10 * of DV technical info.
12 * This library is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU Lesser General Public
14 * License as published by the Free Software Foundation; either
15 * version 2 of the License, or (at your option) any later version.
17 * This library is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * Lesser General Public License for more details.
22 * You should have received a copy of the GNU Lesser General Public
23 * License along with this library; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
33 #include "mpegvideo.h"
34 #include "simple_idct.h"
37 typedef struct DVVideoContext {
42 uint8_t dv_zigzag[2][64];
43 uint8_t dv_idct_shift[2][2][22][64];
45 void (*get_pixels)(DCTELEM *block, const uint8_t *pixels, int line_size);
46 void (*fdct[2])(DCTELEM *block);
47 void (*idct_put[2])(uint8_t *dest, int line_size, DCTELEM *block);
50 #define TEX_VLC_BITS 9
52 #ifdef DV_CODEC_TINY_TARGET
53 #define DV_VLC_MAP_RUN_SIZE 15
54 #define DV_VLC_MAP_LEV_SIZE 23
56 #define DV_VLC_MAP_RUN_SIZE 64
57 #define DV_VLC_MAP_LEV_SIZE 512
61 static uint8_t** dv_anchor;
63 /* XXX: also include quantization */
64 static RL_VLC_ELEM *dv_rl_vlc;
65 /* VLC encoding lookup table */
66 static struct dv_vlc_pair {
69 } (*dv_vlc_map)[DV_VLC_MAP_LEV_SIZE] = NULL;
71 static void dv_build_unquantize_tables(DVVideoContext *s, uint8_t* perm)
75 /* NOTE: max left shift is 6 */
76 for(q = 0; q < 22; q++) {
78 for(i = 1; i < 64; i++) {
81 s->dv_idct_shift[0][0][q][j] =
82 dv_quant_shifts[q][dv_88_areas[i]] + 1;
83 s->dv_idct_shift[1][0][q][j] = s->dv_idct_shift[0][0][q][j] + 1;
87 for(i = 1; i < 64; i++) {
89 s->dv_idct_shift[0][1][q][i] =
90 dv_quant_shifts[q][dv_248_areas[i]] + 1;
91 s->dv_idct_shift[1][1][q][i] = s->dv_idct_shift[0][1][q][i] + 1;
96 static int dvvideo_init(AVCodecContext *avctx)
98 DVVideoContext *s = avctx->priv_data;
105 uint16_t new_dv_vlc_bits[NB_DV_VLC*2];
106 uint8_t new_dv_vlc_len[NB_DV_VLC*2];
107 uint8_t new_dv_vlc_run[NB_DV_VLC*2];
108 int16_t new_dv_vlc_level[NB_DV_VLC*2];
112 dv_vlc_map = av_mallocz(DV_VLC_MAP_LEV_SIZE*DV_VLC_MAP_RUN_SIZE*sizeof(struct dv_vlc_pair));
116 /* dv_anchor lets each thread know its Id */
117 dv_anchor = av_malloc(12*27*sizeof(void*));
122 for (i=0; i<12*27; i++)
123 dv_anchor[i] = (void*)(size_t)i;
125 /* it's faster to include sign bit in a generic VLC parsing scheme */
126 for (i=0, j=0; i<NB_DV_VLC; i++, j++) {
127 new_dv_vlc_bits[j] = dv_vlc_bits[i];
128 new_dv_vlc_len[j] = dv_vlc_len[i];
129 new_dv_vlc_run[j] = dv_vlc_run[i];
130 new_dv_vlc_level[j] = dv_vlc_level[i];
132 if (dv_vlc_level[i]) {
133 new_dv_vlc_bits[j] <<= 1;
137 new_dv_vlc_bits[j] = (dv_vlc_bits[i] << 1) | 1;
138 new_dv_vlc_len[j] = dv_vlc_len[i] + 1;
139 new_dv_vlc_run[j] = dv_vlc_run[i];
140 new_dv_vlc_level[j] = -dv_vlc_level[i];
144 /* NOTE: as a trick, we use the fact the no codes are unused
145 to accelerate the parsing of partial codes */
146 init_vlc(&dv_vlc, TEX_VLC_BITS, j,
147 new_dv_vlc_len, 1, 1, new_dv_vlc_bits, 2, 2);
149 dv_rl_vlc = av_malloc(dv_vlc.table_size * sizeof(RL_VLC_ELEM));
155 for(i = 0; i < dv_vlc.table_size; i++){
156 int code= dv_vlc.table[i][0];
157 int len = dv_vlc.table[i][1];
160 if(len<0){ //more bits needed
164 run= new_dv_vlc_run[code] + 1;
165 level= new_dv_vlc_level[code];
167 dv_rl_vlc[i].len = len;
168 dv_rl_vlc[i].level = level;
169 dv_rl_vlc[i].run = run;
173 for (i = 0; i < NB_DV_VLC - 1; i++) {
174 if (dv_vlc_run[i] >= DV_VLC_MAP_RUN_SIZE)
176 #ifdef DV_CODEC_TINY_TARGET
177 if (dv_vlc_level[i] >= DV_VLC_MAP_LEV_SIZE)
181 if (dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size != 0)
184 dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].vlc = dv_vlc_bits[i] <<
186 dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size = dv_vlc_len[i] +
189 for (i = 0; i < DV_VLC_MAP_RUN_SIZE; i++) {
190 #ifdef DV_CODEC_TINY_TARGET
191 for (j = 1; j < DV_VLC_MAP_LEV_SIZE; j++) {
192 if (dv_vlc_map[i][j].size == 0) {
193 dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc |
194 (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size));
195 dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size +
196 dv_vlc_map[0][j].size;
200 for (j = 1; j < DV_VLC_MAP_LEV_SIZE/2; j++) {
201 if (dv_vlc_map[i][j].size == 0) {
202 dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc |
203 (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size));
204 dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size +
205 dv_vlc_map[0][j].size;
207 dv_vlc_map[i][((uint16_t)(-j))&0x1ff].vlc =
208 dv_vlc_map[i][j].vlc | 1;
209 dv_vlc_map[i][((uint16_t)(-j))&0x1ff].size =
210 dv_vlc_map[i][j].size;
216 /* Generic DSP setup */
217 dsputil_init(&dsp, avctx);
218 s->get_pixels = dsp.get_pixels;
221 s->fdct[0] = dsp.fdct;
222 s->idct_put[0] = dsp.idct_put;
224 s->dv_zigzag[0][i] = dsp.idct_permutation[ff_zigzag_direct[i]];
227 s->fdct[1] = dsp.fdct248;
228 s->idct_put[1] = simple_idct248_put; // FIXME: need to add it to DSP
229 memcpy(s->dv_zigzag[1], ff_zigzag248_direct, 64);
231 /* XXX: do it only for constant case */
232 dv_build_unquantize_tables(s, dsp.idct_permutation);
234 /* FIXME: I really don't think this should be here */
235 if (dv_codec_profile(avctx))
236 avctx->pix_fmt = dv_codec_profile(avctx)->pix_fmt;
237 avctx->coded_frame = &s->picture;
243 // #define printf(...) av_log(NULL, AV_LOG_ERROR, __VA_ARGS__)
245 typedef struct BlockInfo {
246 const uint8_t *shift_table;
247 const uint8_t *scan_table;
248 uint8_t pos; /* position in block */
250 uint8_t partial_bit_count;
251 uint16_t partial_bit_buffer;
255 /* block size in bits */
256 static const uint16_t block_sizes[6] = {
257 112, 112, 112, 112, 80, 80
259 /* bit budget for AC only in 5 MBs */
260 static const int vs_total_ac_bits = (100 * 4 + 68*2) * 5;
261 /* see dv_88_areas and dv_248_areas for details */
262 static const int mb_area_start[5] = { 1, 6, 21, 43, 64 };
264 #ifndef ALT_BITSTREAM_READER
265 #warning only works with ALT_BITSTREAM_READER
268 static inline int get_bits_left(GetBitContext *s)
270 return s->size_in_bits - get_bits_count(s);
273 static inline int get_bits_size(GetBitContext *s)
275 return s->size_in_bits;
278 static inline int put_bits_left(PutBitContext* s)
280 return (s->buf_end - s->buf) * 8 - put_bits_count(s);
283 /* decode ac coefs */
284 static void dv_decode_ac(GetBitContext *gb, BlockInfo *mb, DCTELEM *block)
286 int last_index = get_bits_size(gb);
287 const uint8_t *scan_table = mb->scan_table;
288 const uint8_t *shift_table = mb->shift_table;
290 int partial_bit_count = mb->partial_bit_count;
291 int level, pos1, run, vlc_len, index;
294 UPDATE_CACHE(re, gb);
296 /* if we must parse a partial vlc, we do it here */
297 if (partial_bit_count > 0) {
298 re_cache = ((unsigned)re_cache >> partial_bit_count) |
299 (mb->partial_bit_buffer << (sizeof(re_cache)*8 - partial_bit_count));
300 re_index -= partial_bit_count;
301 mb->partial_bit_count = 0;
304 /* get the AC coefficients until last_index is reached */
307 printf("%2d: bits=%04x index=%d\n", pos, SHOW_UBITS(re, gb, 16), re_index);
309 /* our own optimized GET_RL_VLC */
310 index = NEG_USR32(re_cache, TEX_VLC_BITS);
311 vlc_len = dv_rl_vlc[index].len;
313 index = NEG_USR32((unsigned)re_cache << TEX_VLC_BITS, -vlc_len) + dv_rl_vlc[index].level;
314 vlc_len = TEX_VLC_BITS - vlc_len;
316 level = dv_rl_vlc[index].level;
317 run = dv_rl_vlc[index].run;
319 /* gotta check if we're still within gb boundaries */
320 if (re_index + vlc_len > last_index) {
321 /* should be < 16 bits otherwise a codeword could have been parsed */
322 mb->partial_bit_count = last_index - re_index;
323 mb->partial_bit_buffer = NEG_USR32(re_cache, mb->partial_bit_count);
324 re_index = last_index;
330 printf("run=%d level=%d\n", run, level);
337 pos1 = scan_table[pos];
338 block[pos1] = level << shift_table[pos1];
341 UPDATE_CACHE(re, gb);
343 CLOSE_READER(re, gb);
347 static inline void bit_copy(PutBitContext *pb, GetBitContext *gb)
349 int bits_left = get_bits_left(gb);
350 while (bits_left >= 16) {
351 put_bits(pb, 16, get_bits(gb, 16));
355 put_bits(pb, bits_left, get_bits(gb, bits_left));
359 /* mb_x and mb_y are in units of 8 pixels */
360 static inline void dv_decode_video_segment(DVVideoContext *s,
362 const uint16_t *mb_pos_ptr)
364 int quant, dc, dct_mode, class1, j;
365 int mb_index, mb_x, mb_y, v, last_index;
366 DCTELEM *block, *block1;
369 void (*idct_put)(uint8_t *dest, int line_size, DCTELEM *block);
371 PutBitContext pb, vs_pb;
373 BlockInfo mb_data[5 * 6], *mb, *mb1;
374 DCTELEM sblock[5*6][64] __align8;
375 uint8_t mb_bit_buffer[80 + 4]; /* allow some slack */
376 uint8_t vs_bit_buffer[5 * 80 + 4]; /* allow some slack */
378 memset(sblock, 0, sizeof(sblock));
380 /* pass 1 : read DC and AC coefficients in blocks */
382 block1 = &sblock[0][0];
384 init_put_bits(&vs_pb, vs_bit_buffer, 5 * 80);
385 for(mb_index = 0; mb_index < 5; mb_index++, mb1 += 6, block1 += 6 * 64) {
387 quant = buf_ptr[3] & 0x0f;
389 init_put_bits(&pb, mb_bit_buffer, 80);
392 for(j = 0;j < 6; j++) {
393 last_index = block_sizes[j];
394 init_get_bits(&gb, buf_ptr, last_index);
397 dc = get_bits(&gb, 9);
398 dc = (dc << (32 - 9)) >> (32 - 9);
399 dct_mode = get_bits1(&gb);
400 mb->dct_mode = dct_mode;
401 mb->scan_table = s->dv_zigzag[dct_mode];
402 class1 = get_bits(&gb, 2);
403 mb->shift_table = s->dv_idct_shift[class1 == 3][dct_mode]
404 [quant + dv_quant_offset[class1]];
406 /* convert to unsigned because 128 is not added in the
410 buf_ptr += last_index >> 3;
412 mb->partial_bit_count = 0;
415 printf("MB block: %d, %d ", mb_index, j);
417 dv_decode_ac(&gb, mb, block);
419 /* write the remaining bits in a new buffer only if the
428 /* pass 2 : we can do it just after */
430 printf("***pass 2 size=%d MB#=%d\n", put_bits_count(&pb), mb_index);
434 init_get_bits(&gb, mb_bit_buffer, put_bits_count(&pb));
436 for(j = 0;j < 6; j++, block += 64, mb++) {
437 if (mb->pos < 64 && get_bits_left(&gb) > 0) {
438 dv_decode_ac(&gb, mb, block);
439 /* if still not finished, no need to parse other blocks */
444 /* all blocks are finished, so the extra bytes can be used at
445 the video segment level */
447 bit_copy(&vs_pb, &gb);
450 /* we need a pass other the whole video segment */
452 printf("***pass 3 size=%d\n", put_bits_count(&vs_pb));
454 block = &sblock[0][0];
456 init_get_bits(&gb, vs_bit_buffer, put_bits_count(&vs_pb));
457 flush_put_bits(&vs_pb);
458 for(mb_index = 0; mb_index < 5; mb_index++) {
459 for(j = 0;j < 6; j++) {
462 printf("start %d:%d\n", mb_index, j);
464 dv_decode_ac(&gb, mb, block);
466 if (mb->pos >= 64 && mb->pos < 127)
467 av_log(NULL, AV_LOG_ERROR, "AC EOB marker is absent pos=%d\n", mb->pos);
473 /* compute idct and place blocks */
474 block = &sblock[0][0];
476 for(mb_index = 0; mb_index < 5; mb_index++) {
480 y_ptr = s->picture.data[0] + (mb_y * s->picture.linesize[0] * 8) + (mb_x * 8);
481 if (s->sys->pix_fmt == PIX_FMT_YUV411P)
482 c_offset = (mb_y * s->picture.linesize[1] * 8) + ((mb_x >> 2) * 8);
484 c_offset = ((mb_y >> 1) * s->picture.linesize[1] * 8) + ((mb_x >> 1) * 8);
485 for(j = 0;j < 6; j++) {
486 idct_put = s->idct_put[mb->dct_mode];
488 if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x < (704 / 8)) {
489 /* NOTE: at end of line, the macroblock is handled as 420 */
490 idct_put(y_ptr + (j * 8), s->picture.linesize[0], block);
492 idct_put(y_ptr + ((j & 1) * 8) + ((j >> 1) * 8 * s->picture.linesize[0]),
493 s->picture.linesize[0], block);
496 if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) {
497 uint64_t aligned_pixels[64/8];
498 uint8_t *pixels= (uint8_t*)aligned_pixels;
499 uint8_t *c_ptr, *c_ptr1, *ptr;
501 /* NOTE: at end of line, the macroblock is handled as 420 */
502 idct_put(pixels, 8, block);
503 linesize = s->picture.linesize[6 - j];
504 c_ptr = s->picture.data[6 - j] + c_offset;
506 for(y = 0;y < 8; y++) {
507 /* convert to 411P */
508 c_ptr1 = c_ptr + 8*linesize;
509 c_ptr[0]= ptr[0]; c_ptr1[0]= ptr[4];
510 c_ptr[1]= ptr[1]; c_ptr1[1]= ptr[5];
511 c_ptr[2]= ptr[2]; c_ptr1[2]= ptr[6];
512 c_ptr[3]= ptr[3]; c_ptr1[3]= ptr[7];
517 /* don't ask me why they inverted Cb and Cr ! */
518 idct_put(s->picture.data[6 - j] + c_offset,
519 s->picture.linesize[6 - j], block);
528 #ifdef DV_CODEC_TINY_TARGET
529 /* Converts run and level (where level != 0) pair into vlc, returning bit size */
530 static always_inline int dv_rl2vlc(int run, int l, uint32_t* vlc)
533 int level = (l ^ sign) - sign;
538 if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
539 *vlc = dv_vlc_map[run][level].vlc | sign;
540 size = dv_vlc_map[run][level].size;
543 if (level < DV_VLC_MAP_LEV_SIZE) {
544 *vlc = dv_vlc_map[0][level].vlc | sign;
545 size = dv_vlc_map[0][level].size;
547 *vlc = 0xfe00 | (level << 1) | sign;
551 *vlc |= ((run < 16) ? dv_vlc_map[run-1][0].vlc :
552 (0x1f80 | (run - 1))) << size;
553 size += (run < 16) ? dv_vlc_map[run-1][0].size : 13;
560 static always_inline int dv_rl2vlc_size(int run, int l)
562 int level = (l ^ (l >> 8)) - (l >> 8);
565 if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
566 size = dv_vlc_map[run][level].size;
569 size = (level < DV_VLC_MAP_LEV_SIZE) ? dv_vlc_map[0][level].size : 16;
571 size += (run < 16) ? dv_vlc_map[run-1][0].size : 13;
577 static always_inline int dv_rl2vlc(int run, int l, uint32_t* vlc)
579 *vlc = dv_vlc_map[run][((uint16_t)l)&0x1ff].vlc;
580 return dv_vlc_map[run][((uint16_t)l)&0x1ff].size;
583 static always_inline int dv_rl2vlc_size(int run, int l)
585 return dv_vlc_map[run][((uint16_t)l)&0x1ff].size;
589 typedef struct EncBlockInfo {
597 uint8_t partial_bit_count;
598 uint32_t partial_bit_buffer; /* we can't use uint16_t here */
601 static always_inline void dv_encode_ac(EncBlockInfo* bi, PutBitContext* pb_pool,
606 PutBitContext* pb = pb_pool;
607 int size = bi->partial_bit_count;
608 uint32_t vlc = bi->partial_bit_buffer;
610 bi->partial_bit_count = bi->partial_bit_buffer = 0;
612 /* Find suitable storage space */
613 for (; size > (bits_left = put_bits_left(pb)); pb++) {
616 put_bits(pb, bits_left, vlc >> size);
617 vlc = vlc & ((1<<size)-1);
620 bi->partial_bit_count = size;
621 bi->partial_bit_buffer = vlc;
628 put_bits(pb, size, vlc);
630 /* Construct the next VLC */
632 for (; bi->cur_ac < 64; bi->cur_ac++, run++) {
633 if (bi->mb[bi->cur_ac]) {
634 size = dv_rl2vlc(run, bi->mb[bi->cur_ac], &vlc);
640 if (bi->cur_ac == 64) {
641 size = 4; vlc = 6; /* End Of Block stamp */
647 static always_inline void dv_set_class_number(DCTELEM* blk, EncBlockInfo* bi,
648 const uint8_t* zigzag_scan, int bias)
652 int classes[] = {12, 24, 36, 0xffff};
657 for (area = 0; area < 4; area++) {
658 bi->prev_run[area] = run;
659 bi->bit_size[area] = 0;
660 for (i=mb_area_start[area]; i<mb_area_start[area+1]; i++) {
661 bi->mb[i] = (blk[zigzag_scan[i]] / 16);
662 while ((bi->mb[i] ^ (bi->mb[i] >> 8)) > classes[bi->cno])
666 bi->bit_size[area] += dv_rl2vlc_size(run, bi->mb[i]);
672 bi->bit_size[3] += 4; /* EOB marker */
675 if (bi->cno >= 3) { /* FIXME: we have to recreate bit_size[], prev_run[] */
682 #define SC(x, y) ((s[x] - s[y]) ^ ((s[x] - s[y]) >> 7))
683 static always_inline int dv_guess_dct_mode(DCTELEM *blk) {
689 /* Compute 8-8 score (small values give a better chance for 8-8 DCT) */
692 score88 += SC(0, 8) + SC(1, 9) + SC(2, 10) + SC(3, 11) +
693 SC(4, 12) + SC(5,13) + SC(6, 14) + SC(7, 15);
696 /* Compute 2-4-8 score (small values give a better chance for 2-4-8 DCT) */
699 score248 += SC(0, 16) + SC(1,17) + SC(2, 18) + SC(3, 19) +
700 SC(4, 20) + SC(5,21) + SC(6, 22) + SC(7, 23);
704 return (score88 - score248 > -10);
707 static inline void dv_guess_qnos(EncBlockInfo* blks, int* qnos)
715 for (i=0; i<5; i++) {
721 for (j=0; j<6; j++, b++) {
722 for (a=0; a<4; a++) {
723 if (b->area_q[a] != dv_quant_shifts[qnos[i] + dv_quant_offset[b->cno]][a]) {
724 b->bit_size[a] = (a==3)?4:0;
726 run = b->prev_run[a];
727 for (k=mb_area_start[a]; k<mb_area_start[a+1]; k++) {
730 b->bit_size[a] += dv_rl2vlc_size(run, b->mb[k]);
736 size[i] += b->bit_size[a];
740 } while ((vs_total_ac_bits < size[0] + size[1] + size[2] + size[3] + size[4]) &&
741 (qnos[0]|qnos[1]|qnos[2]|qnos[3]|qnos[4]));
745 * This is a very rough initial implementaion. The performance is
746 * horrible and the weighting is missing. But it's missing from the
747 * decoding step also -- so at least we're on the same page with decoder ;-)
749 static inline void dv_encode_video_segment(DVVideoContext *s,
751 const uint16_t *mb_pos_ptr)
753 int mb_index, i, j, v;
754 int mb_x, mb_y, c_offset, linesize;
759 DCTELEM block[64] __align8;
760 DCTELEM sblock[5*6][64] __align8;
761 EncBlockInfo enc_blks[5*6];
762 PutBitContext pbs[5*6];
764 EncBlockInfo* enc_blk;
768 enc_blk = &enc_blks[0];
770 for(mb_index = 0; mb_index < 5; mb_index++) {
774 y_ptr = s->picture.data[0] + (mb_y * s->picture.linesize[0] * 8) + (mb_x * 8);
775 c_offset = (s->sys->pix_fmt == PIX_FMT_YUV411P) ?
776 ((mb_y * s->picture.linesize[1] * 8) + ((mb_x >> 2) * 8)) :
777 (((mb_y >> 1) * s->picture.linesize[1] * 8) + ((mb_x >> 1) * 8));
779 qnos[mb_index] = 15; /* No quantization */
780 ptr = dif + mb_index*80 + 4;
781 for(j = 0;j < 6; j++) {
782 if (j < 4) { /* Four Y blocks */
783 /* NOTE: at end of line, the macroblock is handled as 420 */
784 if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x < (704 / 8)) {
785 data = y_ptr + (j * 8);
787 data = y_ptr + ((j & 1) * 8) + ((j >> 1) * 8 * s->picture.linesize[0]);
789 linesize = s->picture.linesize[0];
790 } else { /* Cr and Cb blocks */
791 /* don't ask Fabrice why they inverted Cb and Cr ! */
792 data = s->picture.data[6 - j] + c_offset;
793 linesize = s->picture.linesize[6 - j];
794 if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8))
798 /* Everything is set up -- now just copy data -> DCT block */
799 if (do_edge_wrap) { /* Edge wrap copy: 4x16 -> 8x8 */
803 d = data + 8 * linesize;
804 b[0] = data[0]; b[1] = data[1]; b[2] = data[2]; b[3] = data[3];
805 b[4] = d[0]; b[5] = d[1]; b[6] = d[2]; b[7] = d[3];
809 } else { /* Simple copy: 8x8 -> 8x8 */
810 s->get_pixels(block, data, linesize);
813 enc_blk->dct_mode = dv_guess_dct_mode(block);
814 enc_blk->mb = &sblock[mb_index*6+j][0];
815 enc_blk->area_q[0] = enc_blk->area_q[1] = enc_blk->area_q[2] = enc_blk->area_q[3] = 0;
816 enc_blk->partial_bit_count = 0;
817 enc_blk->partial_bit_buffer = 0;
820 s->fdct[enc_blk->dct_mode](block);
822 dv_set_class_number(block, enc_blk,
823 enc_blk->dct_mode ? ff_zigzag248_direct : ff_zigzag_direct,
826 init_put_bits(pb, ptr, block_sizes[j]/8);
827 put_bits(pb, 9, (uint16_t)(((enc_blk->mb[0] >> 3) - 1024) >> 2));
828 put_bits(pb, 1, enc_blk->dct_mode);
829 put_bits(pb, 2, enc_blk->cno);
831 vs_bit_size += enc_blk->bit_size[0] + enc_blk->bit_size[1] +
832 enc_blk->bit_size[2] + enc_blk->bit_size[3];
835 ptr += block_sizes[j]/8;
839 if (vs_total_ac_bits < vs_bit_size)
840 dv_guess_qnos(&enc_blks[0], &qnos[0]);
842 for (i=0; i<5; i++) {
843 dif[i*80 + 3] = qnos[i];
846 /* First pass over individual cells only */
847 for (j=0; j<5*6; j++)
848 dv_encode_ac(&enc_blks[j], &pbs[j], 1);
850 /* Second pass over each MB space */
851 for (j=0; j<5*6; j++) {
852 if (enc_blks[j].cur_ac < 65 || enc_blks[j].partial_bit_count)
853 dv_encode_ac(&enc_blks[j], &pbs[(j/6)*6], 6);
856 /* Third and final pass over the whole vides segment space */
857 for (j=0; j<5*6; j++) {
858 if (enc_blks[j].cur_ac < 65 || enc_blks[j].partial_bit_count)
859 dv_encode_ac(&enc_blks[j], &pbs[0], 6*5);
862 for (j=0; j<5*6; j++)
863 flush_put_bits(&pbs[j]);
866 static int dv_decode_mt(AVCodecContext *avctx, void* sl)
868 DVVideoContext *s = avctx->priv_data;
869 int slice = (size_t)sl;
870 dv_decode_video_segment(s, &s->buf[((slice/27)*6+(slice/3)+slice*5+7)*80],
871 &s->sys->video_place[slice*5]);
875 static int dv_encode_mt(AVCodecContext *avctx, void* sl)
877 DVVideoContext *s = avctx->priv_data;
878 int slice = (size_t)sl;
879 dv_encode_video_segment(s, &s->buf[((slice/27)*6+(slice/3)+slice*5+7)*80],
880 &s->sys->video_place[slice*5]);
884 /* NOTE: exactly one frame must be given (120000 bytes for NTSC,
885 144000 bytes for PAL) */
886 static int dvvideo_decode_frame(AVCodecContext *avctx,
887 void *data, int *data_size,
888 uint8_t *buf, int buf_size)
890 DVVideoContext *s = avctx->priv_data;
892 /* special case for last picture */
896 s->sys = dv_frame_profile(buf);
897 if (!s->sys || buf_size < s->sys->frame_size)
898 return -1; /* NOTE: we only accept several full frames */
900 if(s->picture.data[0])
901 avctx->release_buffer(avctx, &s->picture);
903 s->picture.reference = 0;
904 avctx->pix_fmt = s->sys->pix_fmt;
905 avctx->width = s->sys->width;
906 avctx->height = s->sys->height;
907 if(avctx->get_buffer(avctx, &s->picture) < 0) {
908 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
911 s->picture.interlaced_frame = 1;
912 s->picture.top_field_first = 0;
915 avctx->execute(avctx, dv_decode_mt, (void**)&dv_anchor[0], NULL,
916 s->sys->difseg_size * 27);
921 *data_size = sizeof(AVFrame);
922 *(AVFrame*)data= s->picture;
924 return s->sys->frame_size;
927 static int dvvideo_encode_frame(AVCodecContext *c, uint8_t *buf, int buf_size,
930 DVVideoContext *s = c->priv_data;
932 s->sys = dv_codec_profile(c);
936 c->pix_fmt = s->sys->pix_fmt;
937 s->picture = *((AVFrame *)data);
940 c->execute(c, dv_encode_mt, (void**)&dv_anchor[0], NULL,
941 s->sys->difseg_size * 27);
944 return s->sys->frame_size;
947 AVCodec dvvideo_encoder = {
951 sizeof(DVVideoContext),
953 dvvideo_encode_frame,
960 AVCodec dvvideo_decoder = {
964 sizeof(DVVideoContext),
968 dvvideo_decode_frame,