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"
40 typedef struct DVVideoContext {
43 AVCodecContext *avctx;
46 uint8_t dv_zigzag[2][64];
47 uint8_t dv_idct_shift[2][2][22][64];
49 void (*get_pixels)(DCTELEM *block, const uint8_t *pixels, int line_size);
50 void (*fdct[2])(DCTELEM *block);
51 void (*idct_put[2])(uint8_t *dest, int line_size, DCTELEM *block);
54 #define TEX_VLC_BITS 9
56 #ifdef DV_CODEC_TINY_TARGET
57 #define DV_VLC_MAP_RUN_SIZE 15
58 #define DV_VLC_MAP_LEV_SIZE 23
60 #define DV_VLC_MAP_RUN_SIZE 64
61 #define DV_VLC_MAP_LEV_SIZE 512 //FIXME sign was removed so this should be /2 but needs check
65 static uint8_t** dv_anchor;
67 /* XXX: also include quantization */
68 static RL_VLC_ELEM *dv_rl_vlc;
69 /* VLC encoding lookup table */
70 static struct dv_vlc_pair {
73 } (*dv_vlc_map)[DV_VLC_MAP_LEV_SIZE] = NULL;
75 static void dv_build_unquantize_tables(DVVideoContext *s, uint8_t* perm)
79 /* NOTE: max left shift is 6 */
80 for(q = 0; q < 22; q++) {
82 for(i = 1; i < 64; i++) {
85 s->dv_idct_shift[0][0][q][j] =
86 dv_quant_shifts[q][dv_88_areas[i]] + 1;
87 s->dv_idct_shift[1][0][q][j] = s->dv_idct_shift[0][0][q][j] + 1;
91 for(i = 1; i < 64; i++) {
93 s->dv_idct_shift[0][1][q][i] =
94 dv_quant_shifts[q][dv_248_areas[i]] + 1;
95 s->dv_idct_shift[1][1][q][i] = s->dv_idct_shift[0][1][q][i] + 1;
100 static int dvvideo_init(AVCodecContext *avctx)
102 DVVideoContext *s = avctx->priv_data;
109 uint16_t new_dv_vlc_bits[NB_DV_VLC*2];
110 uint8_t new_dv_vlc_len[NB_DV_VLC*2];
111 uint8_t new_dv_vlc_run[NB_DV_VLC*2];
112 int16_t new_dv_vlc_level[NB_DV_VLC*2];
116 dv_vlc_map = av_mallocz_static(DV_VLC_MAP_LEV_SIZE*DV_VLC_MAP_RUN_SIZE*sizeof(struct dv_vlc_pair));
120 /* dv_anchor lets each thread know its Id */
121 dv_anchor = av_malloc(12*27*sizeof(void*));
125 for (i=0; i<12*27; i++)
126 dv_anchor[i] = (void*)(size_t)i;
128 /* it's faster to include sign bit in a generic VLC parsing scheme */
129 for (i=0, j=0; i<NB_DV_VLC; i++, j++) {
130 new_dv_vlc_bits[j] = dv_vlc_bits[i];
131 new_dv_vlc_len[j] = dv_vlc_len[i];
132 new_dv_vlc_run[j] = dv_vlc_run[i];
133 new_dv_vlc_level[j] = dv_vlc_level[i];
135 if (dv_vlc_level[i]) {
136 new_dv_vlc_bits[j] <<= 1;
140 new_dv_vlc_bits[j] = (dv_vlc_bits[i] << 1) | 1;
141 new_dv_vlc_len[j] = dv_vlc_len[i] + 1;
142 new_dv_vlc_run[j] = dv_vlc_run[i];
143 new_dv_vlc_level[j] = -dv_vlc_level[i];
147 /* NOTE: as a trick, we use the fact the no codes are unused
148 to accelerate the parsing of partial codes */
149 init_vlc(&dv_vlc, TEX_VLC_BITS, j,
150 new_dv_vlc_len, 1, 1, new_dv_vlc_bits, 2, 2, 0);
152 dv_rl_vlc = av_malloc(dv_vlc.table_size * sizeof(RL_VLC_ELEM));
157 for(i = 0; i < dv_vlc.table_size; i++){
158 int code= dv_vlc.table[i][0];
159 int len = dv_vlc.table[i][1];
162 if(len<0){ //more bits needed
166 run= new_dv_vlc_run[code] + 1;
167 level= new_dv_vlc_level[code];
169 dv_rl_vlc[i].len = len;
170 dv_rl_vlc[i].level = level;
171 dv_rl_vlc[i].run = run;
175 for (i = 0; i < NB_DV_VLC - 1; i++) {
176 if (dv_vlc_run[i] >= DV_VLC_MAP_RUN_SIZE)
178 #ifdef DV_CODEC_TINY_TARGET
179 if (dv_vlc_level[i] >= DV_VLC_MAP_LEV_SIZE)
183 if (dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size != 0)
186 dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].vlc = dv_vlc_bits[i] <<
188 dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size = dv_vlc_len[i] +
191 for (i = 0; i < DV_VLC_MAP_RUN_SIZE; i++) {
192 #ifdef DV_CODEC_TINY_TARGET
193 for (j = 1; j < DV_VLC_MAP_LEV_SIZE; j++) {
194 if (dv_vlc_map[i][j].size == 0) {
195 dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc |
196 (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size));
197 dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size +
198 dv_vlc_map[0][j].size;
202 for (j = 1; j < DV_VLC_MAP_LEV_SIZE/2; j++) {
203 if (dv_vlc_map[i][j].size == 0) {
204 dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc |
205 (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size));
206 dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size +
207 dv_vlc_map[0][j].size;
209 dv_vlc_map[i][((uint16_t)(-j))&0x1ff].vlc =
210 dv_vlc_map[i][j].vlc | 1;
211 dv_vlc_map[i][((uint16_t)(-j))&0x1ff].size =
212 dv_vlc_map[i][j].size;
218 /* Generic DSP setup */
219 dsputil_init(&dsp, avctx);
220 s->get_pixels = dsp.get_pixels;
223 s->fdct[0] = dsp.fdct;
224 s->idct_put[0] = dsp.idct_put;
226 s->dv_zigzag[0][i] = dsp.idct_permutation[ff_zigzag_direct[i]];
229 s->fdct[1] = dsp.fdct248;
230 s->idct_put[1] = simple_idct248_put; // FIXME: need to add it to DSP
232 for (i=0; i<64; i++){
233 int j= ff_zigzag248_direct[i];
234 s->dv_zigzag[1][i] = dsp.idct_permutation[(j&7) + (j&8)*4 + (j&48)/2];
237 memcpy(s->dv_zigzag[1], ff_zigzag248_direct, 64);
239 /* XXX: do it only for constant case */
240 dv_build_unquantize_tables(s, dsp.idct_permutation);
242 /* FIXME: I really don't think this should be here */
243 if (dv_codec_profile(avctx))
244 avctx->pix_fmt = dv_codec_profile(avctx)->pix_fmt;
245 avctx->coded_frame = &s->picture;
252 // #define printf(...) av_log(NULL, AV_LOG_ERROR, __VA_ARGS__)
254 typedef struct BlockInfo {
255 const uint8_t *shift_table;
256 const uint8_t *scan_table;
257 uint8_t pos; /* position in block */
259 uint8_t partial_bit_count;
260 uint16_t partial_bit_buffer;
264 /* block size in bits */
265 static const uint16_t block_sizes[6] = {
266 112, 112, 112, 112, 80, 80
268 /* bit budget for AC only in 5 MBs */
269 static const int vs_total_ac_bits = (100 * 4 + 68*2) * 5;
270 /* see dv_88_areas and dv_248_areas for details */
271 static const int mb_area_start[5] = { 1, 6, 21, 43, 64 };
273 #ifndef ALT_BITSTREAM_READER
274 #warning only works with ALT_BITSTREAM_READER
275 static int re_index; //Hack to make it compile
278 static inline int get_bits_left(GetBitContext *s)
280 return s->size_in_bits - get_bits_count(s);
283 static inline int get_bits_size(GetBitContext *s)
285 return s->size_in_bits;
288 static inline int put_bits_left(PutBitContext* s)
290 return (s->buf_end - s->buf) * 8 - put_bits_count(s);
293 /* decode ac coefs */
294 static void dv_decode_ac(GetBitContext *gb, BlockInfo *mb, DCTELEM *block)
296 int last_index = get_bits_size(gb);
297 const uint8_t *scan_table = mb->scan_table;
298 const uint8_t *shift_table = mb->shift_table;
300 int partial_bit_count = mb->partial_bit_count;
301 int level, pos1, run, vlc_len, index;
304 UPDATE_CACHE(re, gb);
306 /* if we must parse a partial vlc, we do it here */
307 if (partial_bit_count > 0) {
308 re_cache = ((unsigned)re_cache >> partial_bit_count) |
309 (mb->partial_bit_buffer << (sizeof(re_cache)*8 - partial_bit_count));
310 re_index -= partial_bit_count;
311 mb->partial_bit_count = 0;
314 /* get the AC coefficients until last_index is reached */
317 printf("%2d: bits=%04x index=%d\n", pos, SHOW_UBITS(re, gb, 16), re_index);
319 /* our own optimized GET_RL_VLC */
320 index = NEG_USR32(re_cache, TEX_VLC_BITS);
321 vlc_len = dv_rl_vlc[index].len;
323 index = NEG_USR32((unsigned)re_cache << TEX_VLC_BITS, -vlc_len) + dv_rl_vlc[index].level;
324 vlc_len = TEX_VLC_BITS - vlc_len;
326 level = dv_rl_vlc[index].level;
327 run = dv_rl_vlc[index].run;
329 /* gotta check if we're still within gb boundaries */
330 if (re_index + vlc_len > last_index) {
331 /* should be < 16 bits otherwise a codeword could have been parsed */
332 mb->partial_bit_count = last_index - re_index;
333 mb->partial_bit_buffer = NEG_USR32(re_cache, mb->partial_bit_count);
334 re_index = last_index;
340 printf("run=%d level=%d\n", run, level);
347 pos1 = scan_table[pos];
348 block[pos1] = level << shift_table[pos1];
350 UPDATE_CACHE(re, gb);
352 CLOSE_READER(re, gb);
356 static inline void bit_copy(PutBitContext *pb, GetBitContext *gb)
358 int bits_left = get_bits_left(gb);
359 while (bits_left >= MIN_CACHE_BITS) {
360 put_bits(pb, MIN_CACHE_BITS, get_bits(gb, MIN_CACHE_BITS));
361 bits_left -= MIN_CACHE_BITS;
364 put_bits(pb, bits_left, get_bits(gb, bits_left));
368 /* mb_x and mb_y are in units of 8 pixels */
369 static inline void dv_decode_video_segment(DVVideoContext *s,
371 const uint16_t *mb_pos_ptr)
373 int quant, dc, dct_mode, class1, j;
374 int mb_index, mb_x, mb_y, v, last_index;
375 DCTELEM *block, *block1;
378 void (*idct_put)(uint8_t *dest, int line_size, DCTELEM *block);
380 PutBitContext pb, vs_pb;
382 BlockInfo mb_data[5 * 6], *mb, *mb1;
383 DCTELEM sblock[5*6][64] __align8;
384 uint8_t mb_bit_buffer[80 + 4] __align8; /* allow some slack */
385 uint8_t vs_bit_buffer[5 * 80 + 4] __align8; /* allow some slack */
386 const int log2_blocksize= 3-s->avctx->lowres;
388 assert((((int)mb_bit_buffer)&7)==0);
389 assert((((int)vs_bit_buffer)&7)==0);
391 memset(sblock, 0, sizeof(sblock));
393 /* pass 1 : read DC and AC coefficients in blocks */
395 block1 = &sblock[0][0];
397 init_put_bits(&vs_pb, vs_bit_buffer, 5 * 80);
398 for(mb_index = 0; mb_index < 5; mb_index++, mb1 += 6, block1 += 6 * 64) {
400 quant = buf_ptr[3] & 0x0f;
402 init_put_bits(&pb, mb_bit_buffer, 80);
405 for(j = 0;j < 6; j++) {
406 last_index = block_sizes[j];
407 init_get_bits(&gb, buf_ptr, last_index);
410 dc = get_sbits(&gb, 9);
411 dct_mode = get_bits1(&gb);
412 mb->dct_mode = dct_mode;
413 mb->scan_table = s->dv_zigzag[dct_mode];
414 class1 = get_bits(&gb, 2);
415 mb->shift_table = s->dv_idct_shift[class1 == 3][dct_mode]
416 [quant + dv_quant_offset[class1]];
418 /* convert to unsigned because 128 is not added in the
422 buf_ptr += last_index >> 3;
424 mb->partial_bit_count = 0;
427 printf("MB block: %d, %d ", mb_index, j);
429 dv_decode_ac(&gb, mb, block);
431 /* write the remaining bits in a new buffer only if the
440 /* pass 2 : we can do it just after */
442 printf("***pass 2 size=%d MB#=%d\n", put_bits_count(&pb), mb_index);
446 init_get_bits(&gb, mb_bit_buffer, put_bits_count(&pb));
448 for(j = 0;j < 6; j++, block += 64, mb++) {
449 if (mb->pos < 64 && get_bits_left(&gb) > 0) {
450 dv_decode_ac(&gb, mb, block);
451 /* if still not finished, no need to parse other blocks */
456 /* all blocks are finished, so the extra bytes can be used at
457 the video segment level */
459 bit_copy(&vs_pb, &gb);
462 /* we need a pass other the whole video segment */
464 printf("***pass 3 size=%d\n", put_bits_count(&vs_pb));
466 block = &sblock[0][0];
468 init_get_bits(&gb, vs_bit_buffer, put_bits_count(&vs_pb));
469 flush_put_bits(&vs_pb);
470 for(mb_index = 0; mb_index < 5; mb_index++) {
471 for(j = 0;j < 6; j++) {
474 printf("start %d:%d\n", mb_index, j);
476 dv_decode_ac(&gb, mb, block);
478 if (mb->pos >= 64 && mb->pos < 127)
479 av_log(NULL, AV_LOG_ERROR, "AC EOB marker is absent pos=%d\n", mb->pos);
485 /* compute idct and place blocks */
486 block = &sblock[0][0];
488 for(mb_index = 0; mb_index < 5; mb_index++) {
492 y_ptr = s->picture.data[0] + ((mb_y * s->picture.linesize[0] + mb_x)<<log2_blocksize);
493 if (s->sys->pix_fmt == PIX_FMT_YUV411P)
494 c_offset = ((mb_y * s->picture.linesize[1] + (mb_x >> 2))<<log2_blocksize);
496 c_offset = (((mb_y >> 1) * s->picture.linesize[1] + (mb_x >> 1))<<log2_blocksize);
497 for(j = 0;j < 6; j++) {
498 idct_put = s->idct_put[mb->dct_mode && log2_blocksize==3];
500 if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x < (704 / 8)) {
501 /* NOTE: at end of line, the macroblock is handled as 420 */
502 idct_put(y_ptr + (j<<log2_blocksize), s->picture.linesize[0], block);
504 idct_put(y_ptr + (((j & 1) + (j >> 1) * s->picture.linesize[0])<<log2_blocksize),
505 s->picture.linesize[0], block);
508 if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) {
509 uint64_t aligned_pixels[64/8];
510 uint8_t *pixels= (uint8_t*)aligned_pixels;
511 uint8_t *c_ptr, *c_ptr1, *ptr, *ptr1;
513 /* NOTE: at end of line, the macroblock is handled as 420 */
514 idct_put(pixels, 8, block);
515 linesize = s->picture.linesize[6 - j];
516 c_ptr = s->picture.data[6 - j] + c_offset;
518 for(y = 0;y < (1<<log2_blocksize); y++) {
519 ptr1= ptr + (1<<(log2_blocksize-1));
520 c_ptr1 = c_ptr + (linesize<<log2_blocksize);
521 for(x=0; x < (1<<(log2_blocksize-1)); x++){
522 c_ptr[x]= ptr[x]; c_ptr1[x]= ptr1[x];
528 /* don't ask me why they inverted Cb and Cr ! */
529 idct_put(s->picture.data[6 - j] + c_offset,
530 s->picture.linesize[6 - j], block);
539 #ifdef DV_CODEC_TINY_TARGET
540 /* Converts run and level (where level != 0) pair into vlc, returning bit size */
541 static always_inline int dv_rl2vlc(int run, int level, int sign, uint32_t* vlc)
544 if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
545 *vlc = dv_vlc_map[run][level].vlc | sign;
546 size = dv_vlc_map[run][level].size;
549 if (level < DV_VLC_MAP_LEV_SIZE) {
550 *vlc = dv_vlc_map[0][level].vlc | sign;
551 size = dv_vlc_map[0][level].size;
553 *vlc = 0xfe00 | (level << 1) | sign;
557 *vlc |= ((run < 16) ? dv_vlc_map[run-1][0].vlc :
558 (0x1f80 | (run - 1))) << size;
559 size += (run < 16) ? dv_vlc_map[run-1][0].size : 13;
566 static always_inline int dv_rl2vlc_size(int run, int level)
570 if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
571 size = dv_vlc_map[run][level].size;
574 size = (level < DV_VLC_MAP_LEV_SIZE) ? dv_vlc_map[0][level].size : 16;
576 size += (run < 16) ? dv_vlc_map[run-1][0].size : 13;
582 static always_inline int dv_rl2vlc(int run, int l, int sign, uint32_t* vlc)
584 *vlc = dv_vlc_map[run][l].vlc | sign;
585 return dv_vlc_map[run][l].size;
588 static always_inline int dv_rl2vlc_size(int run, int l)
590 return dv_vlc_map[run][l].size;
594 typedef struct EncBlockInfo {
604 uint8_t partial_bit_count;
605 uint32_t partial_bit_buffer; /* we can't use uint16_t here */
608 static always_inline PutBitContext* dv_encode_ac(EncBlockInfo* bi, PutBitContext* pb_pool,
609 PutBitContext* pb_end)
613 PutBitContext* pb = pb_pool;
614 int size = bi->partial_bit_count;
615 uint32_t vlc = bi->partial_bit_buffer;
617 bi->partial_bit_count = bi->partial_bit_buffer = 0;
619 /* Find suitable storage space */
620 for (; size > (bits_left = put_bits_left(pb)); pb++) {
623 put_bits(pb, bits_left, vlc >> size);
624 vlc = vlc & ((1<<size)-1);
626 if (pb + 1 >= pb_end) {
627 bi->partial_bit_count = size;
628 bi->partial_bit_buffer = vlc;
634 put_bits(pb, size, vlc);
639 /* Construct the next VLC */
641 bi->cur_ac = bi->next[prev];
643 size = dv_rl2vlc(bi->cur_ac - prev - 1, bi->mb[bi->cur_ac], bi->sign[bi->cur_ac], &vlc);
645 size = 4; vlc = 6; /* End Of Block stamp */
651 static always_inline void dv_set_class_number(DCTELEM* blk, EncBlockInfo* bi,
652 const uint8_t* zigzag_scan, int bias)
655 static const int classes[] = {12, 24, 36, 0xffff};
661 for (area = 0; area < 4; area++) {
662 bi->prev[area] = prev;
663 bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :)
664 for (i=mb_area_start[area]; i<mb_area_start[area+1]; i++) {
665 int level = blk[zigzag_scan[i]];
667 if (level+15 > 30U) {
668 bi->sign[i] = (level>>31)&1;
669 bi->mb[i] = level= ABS(level)>>4;
670 if(level>max) max= level;
671 bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, level);
678 for(bi->cno = 0; max > classes[bi->cno]; bi->cno++);
686 for (area = 0; area < 4; area++) {
687 bi->prev[area] = prev;
688 bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :)
689 for (; i<mb_area_start[area+1]; i= bi->next[i]) {
693 bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, bi->mb[i]);
703 //FIXME replace this by dsputil
704 #define SC(x, y) ((s[x] - s[y]) ^ ((s[x] - s[y]) >> 7))
705 static always_inline int dv_guess_dct_mode(DCTELEM *blk) {
711 /* Compute 8-8 score (small values give a better chance for 8-8 DCT) */
714 score88 += SC(0, 8) + SC(1, 9) + SC(2, 10) + SC(3, 11) +
715 SC(4, 12) + SC(5,13) + SC(6, 14) + SC(7, 15);
718 /* Compute 2-4-8 score (small values give a better chance for 2-4-8 DCT) */
721 score248 += SC(0, 16) + SC(1,17) + SC(2, 18) + SC(3, 19) +
722 SC(4, 20) + SC(5,21) + SC(6, 22) + SC(7, 23);
726 return (score88 - score248 > -10);
729 static inline void dv_guess_qnos(EncBlockInfo* blks, int* qnos)
732 int i, j, k, a, prev;
737 for (i=0; i<5; i++) {
743 for (j=0; j<6; j++, b++) {
744 for (a=0; a<4; a++) {
745 if (b->area_q[a] != dv_quant_shifts[qnos[i] + dv_quant_offset[b->cno]][a]) {
746 b->bit_size[a] = 1; // 4 areas 4 bits for EOB :)
749 for (k= b->next[prev] ; k<mb_area_start[a+1]; k= b->next[k]) {
752 b->bit_size[a] += dv_rl2vlc_size(k - prev - 1, b->mb[k]);
755 b->next[prev] = b->next[k];
760 size[i] += b->bit_size[a];
764 } while ((vs_total_ac_bits < size[0] + size[1] + size[2] + size[3] + size[4]) &&
765 (qnos[0]|qnos[1]|qnos[2]|qnos[3]|qnos[4]));
769 * This is a very rough initial implementaion. The performance is
770 * horrible and the weighting is missing. But it's missing from the
771 * decoding step also -- so at least we're on the same page with decoder ;-)
773 static inline void dv_encode_video_segment(DVVideoContext *s,
775 const uint16_t *mb_pos_ptr)
777 int mb_index, i, j, v;
778 int mb_x, mb_y, c_offset, linesize;
783 DCTELEM block[64] __align8;
784 EncBlockInfo enc_blks[5*6];
785 PutBitContext pbs[5*6];
787 EncBlockInfo* enc_blk;
791 assert((((int)block) & 7) == 0);
793 enc_blk = &enc_blks[0];
795 for(mb_index = 0; mb_index < 5; mb_index++) {
799 y_ptr = s->picture.data[0] + (mb_y * s->picture.linesize[0] * 8) + (mb_x * 8);
800 c_offset = (s->sys->pix_fmt == PIX_FMT_YUV411P) ?
801 ((mb_y * s->picture.linesize[1] * 8) + ((mb_x >> 2) * 8)) :
802 (((mb_y >> 1) * s->picture.linesize[1] * 8) + ((mb_x >> 1) * 8));
804 qnos[mb_index] = 15; /* No quantization */
805 ptr = dif + mb_index*80 + 4;
806 for(j = 0;j < 6; j++) {
807 if (j < 4) { /* Four Y blocks */
808 /* NOTE: at end of line, the macroblock is handled as 420 */
809 if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x < (704 / 8)) {
810 data = y_ptr + (j * 8);
812 data = y_ptr + ((j & 1) * 8) + ((j >> 1) * 8 * s->picture.linesize[0]);
814 linesize = s->picture.linesize[0];
815 } else { /* Cr and Cb blocks */
816 /* don't ask Fabrice why they inverted Cb and Cr ! */
817 data = s->picture.data[6 - j] + c_offset;
818 linesize = s->picture.linesize[6 - j];
819 if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8))
823 /* Everything is set up -- now just copy data -> DCT block */
824 if (do_edge_wrap) { /* Edge wrap copy: 4x16 -> 8x8 */
828 d = data + 8 * linesize;
829 b[0] = data[0]; b[1] = data[1]; b[2] = data[2]; b[3] = data[3];
830 b[4] = d[0]; b[5] = d[1]; b[6] = d[2]; b[7] = d[3];
834 } else { /* Simple copy: 8x8 -> 8x8 */
835 s->get_pixels(block, data, linesize);
838 if(s->avctx->flags & CODEC_FLAG_INTERLACED_DCT)
839 enc_blk->dct_mode = dv_guess_dct_mode(block);
841 enc_blk->dct_mode = 0;
842 enc_blk->area_q[0] = enc_blk->area_q[1] = enc_blk->area_q[2] = enc_blk->area_q[3] = 0;
843 enc_blk->partial_bit_count = 0;
844 enc_blk->partial_bit_buffer = 0;
847 s->fdct[enc_blk->dct_mode](block);
849 dv_set_class_number(block, enc_blk,
850 enc_blk->dct_mode ? ff_zigzag248_direct : ff_zigzag_direct, j/4);
852 init_put_bits(pb, ptr, block_sizes[j]/8);
853 put_bits(pb, 9, (uint16_t)(((enc_blk->mb[0] >> 3) - 1024 + 2) >> 2));
854 put_bits(pb, 1, enc_blk->dct_mode);
855 put_bits(pb, 2, enc_blk->cno);
857 vs_bit_size += enc_blk->bit_size[0] + enc_blk->bit_size[1] +
858 enc_blk->bit_size[2] + enc_blk->bit_size[3];
861 ptr += block_sizes[j]/8;
865 if (vs_total_ac_bits < vs_bit_size)
866 dv_guess_qnos(&enc_blks[0], &qnos[0]);
868 for (i=0; i<5; i++) {
869 dif[i*80 + 3] = qnos[i];
872 /* First pass over individual cells only */
873 for (j=0; j<5*6; j++)
874 dv_encode_ac(&enc_blks[j], &pbs[j], &pbs[j+1]);
876 /* Second pass over each MB space */
877 for (j=0; j<5*6; j+=6) {
879 for (i=0; i<6; i++) {
880 if (enc_blks[i+j].partial_bit_count)
881 pb=dv_encode_ac(&enc_blks[i+j], pb, &pbs[j+6]);
885 /* Third and final pass over the whole vides segment space */
887 for (j=0; j<5*6; j++) {
888 if (enc_blks[j].partial_bit_count)
889 pb=dv_encode_ac(&enc_blks[j], pb, &pbs[6*5]);
892 for (j=0; j<5*6; j++)
893 flush_put_bits(&pbs[j]);
896 static int dv_decode_mt(AVCodecContext *avctx, void* sl)
898 DVVideoContext *s = avctx->priv_data;
899 int slice = (size_t)sl;
900 dv_decode_video_segment(s, &s->buf[((slice/27)*6+(slice/3)+slice*5+7)*80],
901 &s->sys->video_place[slice*5]);
905 static int dv_encode_mt(AVCodecContext *avctx, void* sl)
907 DVVideoContext *s = avctx->priv_data;
908 int slice = (size_t)sl;
909 dv_encode_video_segment(s, &s->buf[((slice/27)*6+(slice/3)+slice*5+7)*80],
910 &s->sys->video_place[slice*5]);
914 /* NOTE: exactly one frame must be given (120000 bytes for NTSC,
915 144000 bytes for PAL) */
916 static int dvvideo_decode_frame(AVCodecContext *avctx,
917 void *data, int *data_size,
918 uint8_t *buf, int buf_size)
920 DVVideoContext *s = avctx->priv_data;
922 s->sys = dv_frame_profile(buf);
923 if (!s->sys || buf_size < s->sys->frame_size)
924 return -1; /* NOTE: we only accept several full frames */
926 if(s->picture.data[0])
927 avctx->release_buffer(avctx, &s->picture);
929 s->picture.reference = 0;
930 s->picture.key_frame = 1;
931 s->picture.pict_type = FF_I_TYPE;
932 avctx->pix_fmt = s->sys->pix_fmt;
933 avcodec_set_dimensions(avctx, s->sys->width, s->sys->height);
934 if(avctx->get_buffer(avctx, &s->picture) < 0) {
935 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
938 s->picture.interlaced_frame = 1;
939 s->picture.top_field_first = 0;
942 avctx->execute(avctx, dv_decode_mt, (void**)&dv_anchor[0], NULL,
943 s->sys->difseg_size * 27);
948 *data_size = sizeof(AVFrame);
949 *(AVFrame*)data= s->picture;
951 return s->sys->frame_size;
954 static int dvvideo_encode_frame(AVCodecContext *c, uint8_t *buf, int buf_size,
957 DVVideoContext *s = c->priv_data;
959 s->sys = dv_codec_profile(c);
962 if(buf_size < s->sys->frame_size)
965 c->pix_fmt = s->sys->pix_fmt;
966 s->picture = *((AVFrame *)data);
967 s->picture.key_frame = 1;
968 s->picture.pict_type = FF_I_TYPE;
971 c->execute(c, dv_encode_mt, (void**)&dv_anchor[0], NULL,
972 s->sys->difseg_size * 27);
975 return s->sys->frame_size;
978 #ifdef CONFIG_DVVIDEO_ENCODER
979 AVCodec dvvideo_encoder = {
983 sizeof(DVVideoContext),
985 dvvideo_encode_frame,
991 #endif // CONFIG_DVVIDEO_ENCODER
993 AVCodec dvvideo_decoder = {
997 sizeof(DVVideoContext),
1001 dvvideo_decode_frame,