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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 /* MultiThreading - applies to entire DV codec, not just the avcontext */
57 #define TEX_VLC_BITS 9
59 #ifdef DV_CODEC_TINY_TARGET
60 #define DV_VLC_MAP_RUN_SIZE 15
61 #define DV_VLC_MAP_LEV_SIZE 23
63 #define DV_VLC_MAP_RUN_SIZE 64
64 #define DV_VLC_MAP_LEV_SIZE 512 //FIXME sign was removed so this should be /2 but needs check
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_mallocz_static(dv_vlc.table_size * sizeof(RL_VLC_ELEM));
156 for(i = 0; i < dv_vlc.table_size; i++){
157 int code= dv_vlc.table[i][0];
158 int len = dv_vlc.table[i][1];
161 if(len<0){ //more bits needed
165 run= new_dv_vlc_run[code] + 1;
166 level= new_dv_vlc_level[code];
168 dv_rl_vlc[i].len = len;
169 dv_rl_vlc[i].level = level;
170 dv_rl_vlc[i].run = run;
174 for (i = 0; i < NB_DV_VLC - 1; i++) {
175 if (dv_vlc_run[i] >= DV_VLC_MAP_RUN_SIZE)
177 #ifdef DV_CODEC_TINY_TARGET
178 if (dv_vlc_level[i] >= DV_VLC_MAP_LEV_SIZE)
182 if (dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size != 0)
185 dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].vlc = dv_vlc_bits[i] <<
187 dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size = dv_vlc_len[i] +
190 for (i = 0; i < DV_VLC_MAP_RUN_SIZE; i++) {
191 #ifdef DV_CODEC_TINY_TARGET
192 for (j = 1; j < DV_VLC_MAP_LEV_SIZE; j++) {
193 if (dv_vlc_map[i][j].size == 0) {
194 dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc |
195 (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size));
196 dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size +
197 dv_vlc_map[0][j].size;
201 for (j = 1; j < DV_VLC_MAP_LEV_SIZE/2; j++) {
202 if (dv_vlc_map[i][j].size == 0) {
203 dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc |
204 (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size));
205 dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size +
206 dv_vlc_map[0][j].size;
208 dv_vlc_map[i][((uint16_t)(-j))&0x1ff].vlc =
209 dv_vlc_map[i][j].vlc | 1;
210 dv_vlc_map[i][((uint16_t)(-j))&0x1ff].size =
211 dv_vlc_map[i][j].size;
217 /* Generic DSP setup */
218 dsputil_init(&dsp, avctx);
219 s->get_pixels = dsp.get_pixels;
222 s->fdct[0] = dsp.fdct;
223 s->idct_put[0] = dsp.idct_put;
225 s->dv_zigzag[0][i] = dsp.idct_permutation[ff_zigzag_direct[i]];
228 s->fdct[1] = dsp.fdct248;
229 s->idct_put[1] = simple_idct248_put; // FIXME: need to add it to DSP
231 for (i=0; i<64; i++){
232 int j= ff_zigzag248_direct[i];
233 s->dv_zigzag[1][i] = dsp.idct_permutation[(j&7) + (j&8)*4 + (j&48)/2];
236 memcpy(s->dv_zigzag[1], ff_zigzag248_direct, 64);
238 /* XXX: do it only for constant case */
239 dv_build_unquantize_tables(s, dsp.idct_permutation);
241 /* FIXME: I really don't think this should be here */
242 if (dv_codec_profile(avctx))
243 avctx->pix_fmt = dv_codec_profile(avctx)->pix_fmt;
244 avctx->coded_frame = &s->picture;
251 // #define printf(...) av_log(NULL, AV_LOG_ERROR, __VA_ARGS__)
253 typedef struct BlockInfo {
254 const uint8_t *shift_table;
255 const uint8_t *scan_table;
256 uint8_t pos; /* position in block */
258 uint8_t partial_bit_count;
259 uint16_t partial_bit_buffer;
263 /* block size in bits */
264 static const uint16_t block_sizes[6] = {
265 112, 112, 112, 112, 80, 80
267 /* bit budget for AC only in 5 MBs */
268 static const int vs_total_ac_bits = (100 * 4 + 68*2) * 5;
269 /* see dv_88_areas and dv_248_areas for details */
270 static const int mb_area_start[5] = { 1, 6, 21, 43, 64 };
272 #ifndef ALT_BITSTREAM_READER
273 #warning only works with ALT_BITSTREAM_READER
274 static int re_index; //Hack to make it compile
277 static inline int get_bits_left(GetBitContext *s)
279 return s->size_in_bits - get_bits_count(s);
282 static inline int get_bits_size(GetBitContext *s)
284 return s->size_in_bits;
287 static inline int put_bits_left(PutBitContext* s)
289 return (s->buf_end - s->buf) * 8 - put_bits_count(s);
292 /* decode ac coefs */
293 static void dv_decode_ac(GetBitContext *gb, BlockInfo *mb, DCTELEM *block)
295 int last_index = get_bits_size(gb);
296 const uint8_t *scan_table = mb->scan_table;
297 const uint8_t *shift_table = mb->shift_table;
299 int partial_bit_count = mb->partial_bit_count;
300 int level, pos1, run, vlc_len, index;
303 UPDATE_CACHE(re, gb);
305 /* if we must parse a partial vlc, we do it here */
306 if (partial_bit_count > 0) {
307 re_cache = ((unsigned)re_cache >> partial_bit_count) |
308 (mb->partial_bit_buffer << (sizeof(re_cache)*8 - partial_bit_count));
309 re_index -= partial_bit_count;
310 mb->partial_bit_count = 0;
313 /* get the AC coefficients until last_index is reached */
316 printf("%2d: bits=%04x index=%d\n", pos, SHOW_UBITS(re, gb, 16), re_index);
318 /* our own optimized GET_RL_VLC */
319 index = NEG_USR32(re_cache, TEX_VLC_BITS);
320 vlc_len = dv_rl_vlc[index].len;
322 index = NEG_USR32((unsigned)re_cache << TEX_VLC_BITS, -vlc_len) + dv_rl_vlc[index].level;
323 vlc_len = TEX_VLC_BITS - vlc_len;
325 level = dv_rl_vlc[index].level;
326 run = dv_rl_vlc[index].run;
328 /* gotta check if we're still within gb boundaries */
329 if (re_index + vlc_len > last_index) {
330 /* should be < 16 bits otherwise a codeword could have been parsed */
331 mb->partial_bit_count = last_index - re_index;
332 mb->partial_bit_buffer = NEG_USR32(re_cache, mb->partial_bit_count);
333 re_index = last_index;
339 printf("run=%d level=%d\n", run, level);
346 pos1 = scan_table[pos];
347 block[pos1] = level << shift_table[pos1];
349 UPDATE_CACHE(re, gb);
351 CLOSE_READER(re, gb);
355 static inline void bit_copy(PutBitContext *pb, GetBitContext *gb)
357 int bits_left = get_bits_left(gb);
358 while (bits_left >= MIN_CACHE_BITS) {
359 put_bits(pb, MIN_CACHE_BITS, get_bits(gb, MIN_CACHE_BITS));
360 bits_left -= MIN_CACHE_BITS;
363 put_bits(pb, bits_left, get_bits(gb, bits_left));
367 /* mb_x and mb_y are in units of 8 pixels */
368 static inline void dv_decode_video_segment(DVVideoContext *s,
370 const uint16_t *mb_pos_ptr)
372 int quant, dc, dct_mode, class1, j;
373 int mb_index, mb_x, mb_y, v, last_index;
374 DCTELEM *block, *block1;
377 void (*idct_put)(uint8_t *dest, int line_size, DCTELEM *block);
379 PutBitContext pb, vs_pb;
381 BlockInfo mb_data[5 * 6], *mb, *mb1;
382 DECLARE_ALIGNED_8(DCTELEM, sblock[5*6][64]);
383 DECLARE_ALIGNED_8(uint8_t, mb_bit_buffer[80 + 4]); /* allow some slack */
384 DECLARE_ALIGNED_8(uint8_t, vs_bit_buffer[5 * 80 + 4]); /* allow some slack */
385 const int log2_blocksize= 3-s->avctx->lowres;
387 assert((((int)mb_bit_buffer)&7)==0);
388 assert((((int)vs_bit_buffer)&7)==0);
390 memset(sblock, 0, sizeof(sblock));
392 /* pass 1 : read DC and AC coefficients in blocks */
394 block1 = &sblock[0][0];
396 init_put_bits(&vs_pb, vs_bit_buffer, 5 * 80);
397 for(mb_index = 0; mb_index < 5; mb_index++, mb1 += 6, block1 += 6 * 64) {
399 quant = buf_ptr[3] & 0x0f;
401 init_put_bits(&pb, mb_bit_buffer, 80);
404 for(j = 0;j < 6; j++) {
405 last_index = block_sizes[j];
406 init_get_bits(&gb, buf_ptr, last_index);
409 dc = get_sbits(&gb, 9);
410 dct_mode = get_bits1(&gb);
411 mb->dct_mode = dct_mode;
412 mb->scan_table = s->dv_zigzag[dct_mode];
413 class1 = get_bits(&gb, 2);
414 mb->shift_table = s->dv_idct_shift[class1 == 3][dct_mode]
415 [quant + dv_quant_offset[class1]];
417 /* convert to unsigned because 128 is not added in the
421 buf_ptr += last_index >> 3;
423 mb->partial_bit_count = 0;
426 printf("MB block: %d, %d ", mb_index, j);
428 dv_decode_ac(&gb, mb, block);
430 /* write the remaining bits in a new buffer only if the
439 /* pass 2 : we can do it just after */
441 printf("***pass 2 size=%d MB#=%d\n", put_bits_count(&pb), mb_index);
445 init_get_bits(&gb, mb_bit_buffer, put_bits_count(&pb));
447 for(j = 0;j < 6; j++, block += 64, mb++) {
448 if (mb->pos < 64 && get_bits_left(&gb) > 0) {
449 dv_decode_ac(&gb, mb, block);
450 /* if still not finished, no need to parse other blocks */
455 /* all blocks are finished, so the extra bytes can be used at
456 the video segment level */
458 bit_copy(&vs_pb, &gb);
461 /* we need a pass other the whole video segment */
463 printf("***pass 3 size=%d\n", put_bits_count(&vs_pb));
465 block = &sblock[0][0];
467 init_get_bits(&gb, vs_bit_buffer, put_bits_count(&vs_pb));
468 flush_put_bits(&vs_pb);
469 for(mb_index = 0; mb_index < 5; mb_index++) {
470 for(j = 0;j < 6; j++) {
473 printf("start %d:%d\n", mb_index, j);
475 dv_decode_ac(&gb, mb, block);
477 if (mb->pos >= 64 && mb->pos < 127)
478 av_log(NULL, AV_LOG_ERROR, "AC EOB marker is absent pos=%d\n", mb->pos);
484 /* compute idct and place blocks */
485 block = &sblock[0][0];
487 for(mb_index = 0; mb_index < 5; mb_index++) {
491 y_ptr = s->picture.data[0] + ((mb_y * s->picture.linesize[0] + mb_x)<<log2_blocksize);
492 if (s->sys->pix_fmt == PIX_FMT_YUV411P)
493 c_offset = ((mb_y * s->picture.linesize[1] + (mb_x >> 2))<<log2_blocksize);
495 c_offset = (((mb_y >> 1) * s->picture.linesize[1] + (mb_x >> 1))<<log2_blocksize);
496 for(j = 0;j < 6; j++) {
497 idct_put = s->idct_put[mb->dct_mode && log2_blocksize==3];
499 if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x < (704 / 8)) {
500 /* NOTE: at end of line, the macroblock is handled as 420 */
501 idct_put(y_ptr + (j<<log2_blocksize), s->picture.linesize[0], block);
503 idct_put(y_ptr + (((j & 1) + (j >> 1) * s->picture.linesize[0])<<log2_blocksize),
504 s->picture.linesize[0], block);
507 if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) {
508 uint64_t aligned_pixels[64/8];
509 uint8_t *pixels= (uint8_t*)aligned_pixels;
510 uint8_t *c_ptr, *c_ptr1, *ptr, *ptr1;
512 /* NOTE: at end of line, the macroblock is handled as 420 */
513 idct_put(pixels, 8, block);
514 linesize = s->picture.linesize[6 - j];
515 c_ptr = s->picture.data[6 - j] + c_offset;
517 for(y = 0;y < (1<<log2_blocksize); y++) {
518 ptr1= ptr + (1<<(log2_blocksize-1));
519 c_ptr1 = c_ptr + (linesize<<log2_blocksize);
520 for(x=0; x < (1<<(log2_blocksize-1)); x++){
521 c_ptr[x]= ptr[x]; c_ptr1[x]= ptr1[x];
527 /* don't ask me why they inverted Cb and Cr ! */
528 idct_put(s->picture.data[6 - j] + c_offset,
529 s->picture.linesize[6 - j], block);
538 #ifdef DV_CODEC_TINY_TARGET
539 /* Converts run and level (where level != 0) pair into vlc, returning bit size */
540 static always_inline int dv_rl2vlc(int run, int level, int sign, uint32_t* vlc)
543 if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
544 *vlc = dv_vlc_map[run][level].vlc | sign;
545 size = dv_vlc_map[run][level].size;
548 if (level < DV_VLC_MAP_LEV_SIZE) {
549 *vlc = dv_vlc_map[0][level].vlc | sign;
550 size = dv_vlc_map[0][level].size;
552 *vlc = 0xfe00 | (level << 1) | sign;
556 *vlc |= ((run < 16) ? dv_vlc_map[run-1][0].vlc :
557 (0x1f80 | (run - 1))) << size;
558 size += (run < 16) ? dv_vlc_map[run-1][0].size : 13;
565 static always_inline int dv_rl2vlc_size(int run, int level)
569 if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
570 size = dv_vlc_map[run][level].size;
573 size = (level < DV_VLC_MAP_LEV_SIZE) ? dv_vlc_map[0][level].size : 16;
575 size += (run < 16) ? dv_vlc_map[run-1][0].size : 13;
581 static always_inline int dv_rl2vlc(int run, int l, int sign, uint32_t* vlc)
583 *vlc = dv_vlc_map[run][l].vlc | sign;
584 return dv_vlc_map[run][l].size;
587 static always_inline int dv_rl2vlc_size(int run, int l)
589 return dv_vlc_map[run][l].size;
593 typedef struct EncBlockInfo {
603 uint8_t partial_bit_count;
604 uint32_t partial_bit_buffer; /* we can't use uint16_t here */
607 static always_inline PutBitContext* dv_encode_ac(EncBlockInfo* bi, PutBitContext* pb_pool,
608 PutBitContext* pb_end)
612 PutBitContext* pb = pb_pool;
613 int size = bi->partial_bit_count;
614 uint32_t vlc = bi->partial_bit_buffer;
616 bi->partial_bit_count = bi->partial_bit_buffer = 0;
618 /* Find suitable storage space */
619 for (; size > (bits_left = put_bits_left(pb)); pb++) {
622 put_bits(pb, bits_left, vlc >> size);
623 vlc = vlc & ((1<<size)-1);
625 if (pb + 1 >= pb_end) {
626 bi->partial_bit_count = size;
627 bi->partial_bit_buffer = vlc;
633 put_bits(pb, size, vlc);
638 /* Construct the next VLC */
640 bi->cur_ac = bi->next[prev];
642 size = dv_rl2vlc(bi->cur_ac - prev - 1, bi->mb[bi->cur_ac], bi->sign[bi->cur_ac], &vlc);
644 size = 4; vlc = 6; /* End Of Block stamp */
650 static always_inline void dv_set_class_number(DCTELEM* blk, EncBlockInfo* bi,
651 const uint8_t* zigzag_scan, int bias)
654 static const int classes[] = {12, 24, 36, 0xffff};
660 for (area = 0; area < 4; area++) {
661 bi->prev[area] = prev;
662 bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :)
663 for (i=mb_area_start[area]; i<mb_area_start[area+1]; i++) {
664 int level = blk[zigzag_scan[i]];
666 if (level+15 > 30U) {
667 bi->sign[i] = (level>>31)&1;
668 bi->mb[i] = level= ABS(level)>>4;
669 if(level>max) max= level;
670 bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, level);
677 for(bi->cno = 0; max > classes[bi->cno]; bi->cno++);
685 for (area = 0; area < 4; area++) {
686 bi->prev[area] = prev;
687 bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :)
688 for (; i<mb_area_start[area+1]; i= bi->next[i]) {
692 bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, bi->mb[i]);
702 //FIXME replace this by dsputil
703 #define SC(x, y) ((s[x] - s[y]) ^ ((s[x] - s[y]) >> 7))
704 static always_inline int dv_guess_dct_mode(DCTELEM *blk) {
710 /* Compute 8-8 score (small values give a better chance for 8-8 DCT) */
713 score88 += SC(0, 8) + SC(1, 9) + SC(2, 10) + SC(3, 11) +
714 SC(4, 12) + SC(5,13) + SC(6, 14) + SC(7, 15);
717 /* Compute 2-4-8 score (small values give a better chance for 2-4-8 DCT) */
720 score248 += SC(0, 16) + SC(1,17) + SC(2, 18) + SC(3, 19) +
721 SC(4, 20) + SC(5,21) + SC(6, 22) + SC(7, 23);
725 return (score88 - score248 > -10);
728 static inline void dv_guess_qnos(EncBlockInfo* blks, int* qnos)
731 int i, j, k, a, prev;
736 for (i=0; i<5; i++) {
742 for (j=0; j<6; j++, b++) {
743 for (a=0; a<4; a++) {
744 if (b->area_q[a] != dv_quant_shifts[qnos[i] + dv_quant_offset[b->cno]][a]) {
745 b->bit_size[a] = 1; // 4 areas 4 bits for EOB :)
748 for (k= b->next[prev] ; k<mb_area_start[a+1]; k= b->next[k]) {
751 b->bit_size[a] += dv_rl2vlc_size(k - prev - 1, b->mb[k]);
754 b->next[prev] = b->next[k];
759 size[i] += b->bit_size[a];
763 } while ((vs_total_ac_bits < size[0] + size[1] + size[2] + size[3] + size[4]) &&
764 (qnos[0]|qnos[1]|qnos[2]|qnos[3]|qnos[4]));
768 * This is a very rough initial implementaion. The performance is
769 * horrible and the weighting is missing. But it's missing from the
770 * decoding step also -- so at least we're on the same page with decoder ;-)
772 static inline void dv_encode_video_segment(DVVideoContext *s,
774 const uint16_t *mb_pos_ptr)
776 int mb_index, i, j, v;
777 int mb_x, mb_y, c_offset, linesize;
782 DECLARE_ALIGNED_8(DCTELEM, block[64]);
783 EncBlockInfo enc_blks[5*6];
784 PutBitContext pbs[5*6];
786 EncBlockInfo* enc_blk;
790 assert((((int)block) & 7) == 0);
792 enc_blk = &enc_blks[0];
794 for(mb_index = 0; mb_index < 5; mb_index++) {
798 y_ptr = s->picture.data[0] + (mb_y * s->picture.linesize[0] * 8) + (mb_x * 8);
799 c_offset = (s->sys->pix_fmt == PIX_FMT_YUV411P) ?
800 ((mb_y * s->picture.linesize[1] * 8) + ((mb_x >> 2) * 8)) :
801 (((mb_y >> 1) * s->picture.linesize[1] * 8) + ((mb_x >> 1) * 8));
803 qnos[mb_index] = 15; /* No quantization */
804 ptr = dif + mb_index*80 + 4;
805 for(j = 0;j < 6; j++) {
806 if (j < 4) { /* Four Y blocks */
807 /* NOTE: at end of line, the macroblock is handled as 420 */
808 if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x < (704 / 8)) {
809 data = y_ptr + (j * 8);
811 data = y_ptr + ((j & 1) * 8) + ((j >> 1) * 8 * s->picture.linesize[0]);
813 linesize = s->picture.linesize[0];
814 } else { /* Cr and Cb blocks */
815 /* don't ask Fabrice why they inverted Cb and Cr ! */
816 data = s->picture.data[6 - j] + c_offset;
817 linesize = s->picture.linesize[6 - j];
818 if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8))
822 /* Everything is set up -- now just copy data -> DCT block */
823 if (do_edge_wrap) { /* Edge wrap copy: 4x16 -> 8x8 */
827 d = data + 8 * linesize;
828 b[0] = data[0]; b[1] = data[1]; b[2] = data[2]; b[3] = data[3];
829 b[4] = d[0]; b[5] = d[1]; b[6] = d[2]; b[7] = d[3];
833 } else { /* Simple copy: 8x8 -> 8x8 */
834 s->get_pixels(block, data, linesize);
837 if(s->avctx->flags & CODEC_FLAG_INTERLACED_DCT)
838 enc_blk->dct_mode = dv_guess_dct_mode(block);
840 enc_blk->dct_mode = 0;
841 enc_blk->area_q[0] = enc_blk->area_q[1] = enc_blk->area_q[2] = enc_blk->area_q[3] = 0;
842 enc_blk->partial_bit_count = 0;
843 enc_blk->partial_bit_buffer = 0;
846 s->fdct[enc_blk->dct_mode](block);
848 dv_set_class_number(block, enc_blk,
849 enc_blk->dct_mode ? ff_zigzag248_direct : ff_zigzag_direct, j/4);
851 init_put_bits(pb, ptr, block_sizes[j]/8);
852 put_bits(pb, 9, (uint16_t)(((enc_blk->mb[0] >> 3) - 1024 + 2) >> 2));
853 put_bits(pb, 1, enc_blk->dct_mode);
854 put_bits(pb, 2, enc_blk->cno);
856 vs_bit_size += enc_blk->bit_size[0] + enc_blk->bit_size[1] +
857 enc_blk->bit_size[2] + enc_blk->bit_size[3];
860 ptr += block_sizes[j]/8;
864 if (vs_total_ac_bits < vs_bit_size)
865 dv_guess_qnos(&enc_blks[0], &qnos[0]);
867 for (i=0; i<5; i++) {
868 dif[i*80 + 3] = qnos[i];
871 /* First pass over individual cells only */
872 for (j=0; j<5*6; j++)
873 dv_encode_ac(&enc_blks[j], &pbs[j], &pbs[j+1]);
875 /* Second pass over each MB space */
876 for (j=0; j<5*6; j+=6) {
878 for (i=0; i<6; i++) {
879 if (enc_blks[i+j].partial_bit_count)
880 pb=dv_encode_ac(&enc_blks[i+j], pb, &pbs[j+6]);
884 /* Third and final pass over the whole vides segment space */
886 for (j=0; j<5*6; j++) {
887 if (enc_blks[j].partial_bit_count)
888 pb=dv_encode_ac(&enc_blks[j], pb, &pbs[6*5]);
891 for (j=0; j<5*6; j++)
892 flush_put_bits(&pbs[j]);
895 static int dv_decode_mt(AVCodecContext *avctx, void* sl)
897 DVVideoContext *s = avctx->priv_data;
898 int slice = (size_t)sl;
899 dv_decode_video_segment(s, &s->buf[((slice/27)*6+(slice/3)+slice*5+7)*80],
900 &s->sys->video_place[slice*5]);
904 static int dv_encode_mt(AVCodecContext *avctx, void* sl)
906 DVVideoContext *s = avctx->priv_data;
907 int slice = (size_t)sl;
908 dv_encode_video_segment(s, &s->buf[((slice/27)*6+(slice/3)+slice*5+7)*80],
909 &s->sys->video_place[slice*5]);
913 /* NOTE: exactly one frame must be given (120000 bytes for NTSC,
914 144000 bytes for PAL) */
915 static int dvvideo_decode_frame(AVCodecContext *avctx,
916 void *data, int *data_size,
917 uint8_t *buf, int buf_size)
919 DVVideoContext *s = avctx->priv_data;
921 s->sys = dv_frame_profile(buf);
922 if (!s->sys || buf_size < s->sys->frame_size)
923 return -1; /* NOTE: we only accept several full frames */
925 if(s->picture.data[0])
926 avctx->release_buffer(avctx, &s->picture);
928 s->picture.reference = 0;
929 s->picture.key_frame = 1;
930 s->picture.pict_type = FF_I_TYPE;
931 avctx->pix_fmt = s->sys->pix_fmt;
932 avcodec_set_dimensions(avctx, s->sys->width, s->sys->height);
933 if(avctx->get_buffer(avctx, &s->picture) < 0) {
934 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
937 s->picture.interlaced_frame = 1;
938 s->picture.top_field_first = 0;
941 avctx->execute(avctx, dv_decode_mt, (void**)&dv_anchor[0], NULL,
942 s->sys->difseg_size * 27);
947 *data_size = sizeof(AVFrame);
948 *(AVFrame*)data= s->picture;
950 return s->sys->frame_size;
953 static int dvvideo_encode_frame(AVCodecContext *c, uint8_t *buf, int buf_size,
956 DVVideoContext *s = c->priv_data;
958 s->sys = dv_codec_profile(c);
961 if(buf_size < s->sys->frame_size)
964 c->pix_fmt = s->sys->pix_fmt;
965 s->picture = *((AVFrame *)data);
966 s->picture.key_frame = 1;
967 s->picture.pict_type = FF_I_TYPE;
970 c->execute(c, dv_encode_mt, (void**)&dv_anchor[0], NULL,
971 s->sys->difseg_size * 27);
974 return s->sys->frame_size;
977 static int dvvideo_close(AVCodecContext *c)
984 #ifdef CONFIG_DVVIDEO_ENCODER
985 AVCodec dvvideo_encoder = {
989 sizeof(DVVideoContext),
991 dvvideo_encode_frame,
997 #endif // CONFIG_DVVIDEO_ENCODER
999 AVCodec dvvideo_decoder = {
1003 sizeof(DVVideoContext),
1007 dvvideo_decode_frame,