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);
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
s->dv_anchor = av_malloc(12*27*sizeof(void*));
125
for (i=0; i<12*27; i++)
126
s->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));
154
av_free(s->dv_anchor);
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**)&s->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**)&s->dv_anchor[0], NULL,
972
s->sys->difseg_size * 27);
975
return s->sys->frame_size;
978
static int dvvideo_close(AVCodecContext *c)
980
DVVideoContext *s = c->priv_data;
982
av_free(s->dv_anchor);
988
#ifdef CONFIG_DVVIDEO_ENCODER
989
AVCodec dvvideo_encoder = {
993
sizeof(DVVideoContext),
995
dvvideo_encode_frame,
1001
#endif // CONFIG_DVVIDEO_ENCODER
1003
AVCodec dvvideo_decoder = {
1007
sizeof(DVVideoContext),
1011
dvvideo_decode_frame,
added
removed
adm_lavcodec/dv.c
