2
* Duck/ON2 TrueMotion 2 Decoder
3
* Copyright (c) 2005 Konstantin Shishkov
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
25
* Duck TrueMotion2 decoder.
30
#include "bitstream.h"
33
#define TM2_ESCAPE 0x80000000
35
/* Huffman-coded streams of different types of blocks */
36
enum TM2_STREAMS{ TM2_C_HI = 0, TM2_C_LO, TM2_L_HI, TM2_L_LO,
37
TM2_UPD, TM2_MOT, TM2_TYPE, TM2_NUM_STREAMS};
39
enum TM2_BLOCKS{ TM2_HI_RES = 0, TM2_MED_RES, TM2_LOW_RES, TM2_NULL_RES,
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TM2_UPDATE, TM2_STILL, TM2_MOTION};
42
typedef struct TM2Context{
43
AVCodecContext *avctx;
50
int *tokens[TM2_NUM_STREAMS];
51
int tok_lens[TM2_NUM_STREAMS];
52
int tok_ptrs[TM2_NUM_STREAMS];
53
int deltas[TM2_NUM_STREAMS][TM2_DELTAS];
54
/* for blocks decoding */
60
/* data for current and previous frame */
61
int *Y1, *U1, *V1, *Y2, *U2, *V2;
66
* Huffman codes for each of streams
68
typedef struct TM2Codes{
69
VLC vlc; ///< table for FFmpeg bitstream reader
71
int *recode; ///< table for converting from code indexes to values
76
* structure for gathering Huffman codes information
78
typedef struct TM2Huff{
79
int val_bits; ///< length of literal
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int max_bits; ///< maximum length of code
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int min_bits; ///< minimum length of code
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int nodes; ///< total number of nodes in tree
83
int num; ///< current number filled
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int max_num; ///< total number of codes
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int *nums; ///< literals
86
uint32_t *bits; ///< codes
87
int *lens; ///< codelengths
90
static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff)
92
if(length > huff->max_bits) {
93
av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n", huff->max_bits);
97
if(!get_bits1(&ctx->gb)) { /* literal */
101
if(huff->num >= huff->max_num) {
102
av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n");
105
huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits);
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huff->bits[huff->num] = prefix;
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huff->lens[huff->num] = length;
110
} else { /* non-terminal node */
111
if(tm2_read_tree(ctx, prefix << 1, length + 1, huff) == -1)
113
if(tm2_read_tree(ctx, (prefix << 1) | 1, length + 1, huff) == -1)
119
static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code)
124
huff.val_bits = get_bits(&ctx->gb, 5);
125
huff.max_bits = get_bits(&ctx->gb, 5);
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huff.min_bits = get_bits(&ctx->gb, 5);
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huff.nodes = get_bits_long(&ctx->gb, 17);
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/* check for correct codes parameters */
131
if((huff.val_bits < 1) || (huff.val_bits > 32) ||
132
(huff.max_bits < 0) || (huff.max_bits > 32)) {
133
av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal length: %i, max code length: %i\n",
134
huff.val_bits, huff.max_bits);
137
if((huff.nodes < 0) || (huff.nodes > 0x10000)) {
138
av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree nodes: %i\n", huff.nodes);
142
if(huff.max_bits == 0)
145
/* allocate space for codes - it is exactly ceil(nodes / 2) entries */
146
huff.max_num = (huff.nodes + 1) >> 1;
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huff.nums = av_mallocz(huff.max_num * sizeof(int));
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huff.bits = av_mallocz(huff.max_num * sizeof(uint32_t));
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huff.lens = av_mallocz(huff.max_num * sizeof(int));
151
if(tm2_read_tree(ctx, 0, 0, &huff) == -1)
154
if(huff.num != huff.max_num) {
155
av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n",
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huff.num, huff.max_num);
160
/* convert codes to vlc_table */
164
res = init_vlc(&code->vlc, huff.max_bits, huff.max_num,
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huff.lens, sizeof(int), sizeof(int),
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huff.bits, sizeof(uint32_t), sizeof(uint32_t), 0);
168
av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
173
code->bits = huff.max_bits;
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code->length = huff.max_num;
175
code->recode = av_malloc(code->length * sizeof(int));
176
for(i = 0; i < code->length; i++)
177
code->recode[i] = huff.nums[i];
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/* free allocated memory */
188
static void tm2_free_codes(TM2Codes *code)
191
av_free(code->recode);
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free_vlc(&code->vlc);
196
static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code)
199
val = get_vlc2(gb, code->vlc.table, code->bits, 1);
200
return code->recode[val];
203
static inline int tm2_read_header(TM2Context *ctx, uint8_t *buf)
211
magic = AV_RL32(buf);
214
if(magic == 0x00000100) { /* old header */
215
/* av_log (ctx->avctx, AV_LOG_ERROR, "TM2 old header: not implemented (yet)\n"); */
217
} else if(magic == 0x00000101) { /* new header */
218
int w, h, size, flags, xr, yr;
220
length = AV_RL32(buf);
223
init_get_bits(&ctx->gb, buf, 32 * 8);
224
size = get_bits_long(&ctx->gb, 31);
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h = get_bits(&ctx->gb, 15);
226
w = get_bits(&ctx->gb, 15);
227
flags = get_bits_long(&ctx->gb, 31);
228
yr = get_bits(&ctx->gb, 9);
229
xr = get_bits(&ctx->gb, 9);
233
av_log (ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08X\n", magic);
240
static int tm2_read_deltas(TM2Context *ctx, int stream_id) {
244
d = get_bits(&ctx->gb, 9);
245
mb = get_bits(&ctx->gb, 5);
247
if((d < 1) || (d > TM2_DELTAS) || (mb < 1) || (mb > 32)) {
248
av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect delta table: %i deltas x %i bits\n", d, mb);
252
for(i = 0; i < d; i++) {
253
v = get_bits_long(&ctx->gb, mb);
254
if(v & (1 << (mb - 1)))
255
ctx->deltas[stream_id][i] = v - (1 << mb);
257
ctx->deltas[stream_id][i] = v;
259
for(; i < TM2_DELTAS; i++)
260
ctx->deltas[stream_id][i] = 0;
265
static int tm2_read_stream(TM2Context *ctx, uint8_t *buf, int stream_id) {
272
/* get stream length in dwords */
273
len = AV_RB32(buf); buf += 4; cur += 4;
279
toks = AV_RB32(buf); buf += 4; cur += 4;
281
len = AV_RB32(buf); buf += 4; cur += 4;
282
if(len == TM2_ESCAPE) {
283
len = AV_RB32(buf); buf += 4; cur += 4;
286
init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
287
if(tm2_read_deltas(ctx, stream_id) == -1)
289
buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
290
cur += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
293
/* skip unused fields */
294
if(AV_RB32(buf) == TM2_ESCAPE) {
295
buf += 4; cur += 4; /* some unknown length - could be escaped too */
298
buf += 4; cur += 4; /* unused by decoder */
300
init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
301
if(tm2_build_huff_table(ctx, &codes) == -1)
303
buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
304
cur += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
307
/* check if we have sane number of tokens */
308
if((toks < 0) || (toks > 0xFFFFFF)){
309
av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
310
tm2_free_codes(&codes);
313
ctx->tokens[stream_id] = av_realloc(ctx->tokens[stream_id], toks * sizeof(int));
314
ctx->tok_lens[stream_id] = toks;
315
len = AV_RB32(buf); buf += 4; cur += 4;
317
init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
318
for(i = 0; i < toks; i++)
319
ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes);
321
for(i = 0; i < toks; i++)
322
ctx->tokens[stream_id][i] = codes.recode[0];
324
tm2_free_codes(&codes);
329
static inline int GET_TOK(TM2Context *ctx,int type) {
330
if(ctx->tok_ptrs[type] >= ctx->tok_lens[type]) {
331
av_log(ctx->avctx, AV_LOG_ERROR, "Read token from stream %i out of bounds (%i>=%i)\n", type, ctx->tok_ptrs[type], ctx->tok_lens[type]);
335
return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]];
336
return ctx->tokens[type][ctx->tok_ptrs[type]++];
339
/* blocks decoding routines */
341
/* common Y, U, V pointers initialisation */
342
#define TM2_INIT_POINTERS() \
345
int Ystride, Ustride, Vstride;\
347
Ystride = ctx->avctx->width;\
348
Vstride = (ctx->avctx->width + 1) >> 1;\
349
Ustride = (ctx->avctx->width + 1) >> 1;\
350
Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\
351
V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\
352
U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\
353
last = ctx->last + bx * 4;\
354
clast = ctx->clast + bx * 4;
356
#define TM2_INIT_POINTERS_2() \
358
int oYstride, oUstride, oVstride;\
360
TM2_INIT_POINTERS();\
364
Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\
365
Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\
366
Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2;
368
/* recalculate last and delta values for next blocks */
369
#define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\
370
CD[0] = (CHR[1] - 128) - last[1];\
371
CD[1] = (int)CHR[stride + 1] - (int)CHR[1];\
372
last[0] = (int)CHR[stride + 0] - 128;\
373
last[1] = (int)CHR[stride + 1] - 128;}
375
/* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */
376
static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last)
381
for(j = 0; j < 4; j++){
383
for(i = 0; i < 4; i++){
384
d = deltas[i + j * 4];
387
Y[i] = av_clip_uint8(last[i]);
394
static inline void tm2_high_chroma(int *data, int stride, int *last, int *CD, int *deltas)
397
for(j = 0; j < 2; j++){
398
for(i = 0; i < 2; i++){
399
CD[j] += deltas[i + j * 2];
401
data[i] = last[i] + 128;
407
static inline void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx)
417
t = (CD[0] + CD[1]) >> 1;
418
l = (prev - CD[0] - CD[1] + clast[1]) >> 1;
419
CD[1] = CD[0] + CD[1] - t;
423
tm2_high_chroma(data, stride, clast, CD, deltas);
426
static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
433
for(i = 0; i < 4; i++) {
434
deltas[i] = GET_TOK(ctx, TM2_C_HI);
435
deltas[i + 4] = GET_TOK(ctx, TM2_C_HI);
437
tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas);
438
tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4);
441
for(i = 0; i < 16; i++)
442
deltas[i] = GET_TOK(ctx, TM2_L_HI);
444
tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
447
static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
454
deltas[0] = GET_TOK(ctx, TM2_C_LO);
455
deltas[1] = deltas[2] = deltas[3] = 0;
456
tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
458
deltas[0] = GET_TOK(ctx, TM2_C_LO);
459
deltas[1] = deltas[2] = deltas[3] = 0;
460
tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
463
for(i = 0; i < 16; i++)
464
deltas[i] = GET_TOK(ctx, TM2_L_HI);
466
tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
469
static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
477
deltas[0] = GET_TOK(ctx, TM2_C_LO);
478
deltas[1] = deltas[2] = deltas[3] = 0;
479
tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
481
deltas[0] = GET_TOK(ctx, TM2_C_LO);
482
deltas[1] = deltas[2] = deltas[3] = 0;
483
tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
486
for(i = 0; i < 16; i++)
489
deltas[ 0] = GET_TOK(ctx, TM2_L_LO);
490
deltas[ 2] = GET_TOK(ctx, TM2_L_LO);
491
deltas[ 8] = GET_TOK(ctx, TM2_L_LO);
492
deltas[10] = GET_TOK(ctx, TM2_L_LO);
495
last[0] = (last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1;
497
last[0] = (last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1;
498
last[2] = (last[1] + last[3]) >> 1;
500
t1 = ctx->D[0] + ctx->D[1];
502
ctx->D[1] = t1 - (t1 >> 1);
503
t2 = ctx->D[2] + ctx->D[3];
505
ctx->D[3] = t2 - (t2 >> 1);
507
tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
510
static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
514
int left, right, diff;
519
deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
520
tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
522
deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
523
tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
526
for(i = 0; i < 16; i++)
529
ct = ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3];
532
left = last[-1] - ct;
538
last[0] = left + (diff >> 2);
539
last[1] = left + (diff >> 1);
540
last[2] = right - (diff >> 2);
545
ctx->D[0] = (tp + (ct >> 2)) - left;
547
ctx->D[1] = (tp + (ct >> 1)) - left;
549
ctx->D[2] = ((tp + ct) - (ct >> 2)) - left;
551
ctx->D[3] = (tp + ct) - left;
553
tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
556
static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
559
TM2_INIT_POINTERS_2();
562
for(j = 0; j < 2; j++){
563
for(i = 0; i < 2; i++){
567
U += Ustride; V += Vstride;
568
Uo += oUstride; Vo += oVstride;
572
TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
573
TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
576
ctx->D[0] = Yo[3] - last[3];
577
ctx->D[1] = Yo[3 + oYstride] - Yo[3];
578
ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
579
ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
581
for(j = 0; j < 4; j++){
582
for(i = 0; i < 4; i++){
591
static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
595
TM2_INIT_POINTERS_2();
598
for(j = 0; j < 2; j++){
599
for(i = 0; i < 2; i++){
600
U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD);
601
V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD);
603
U += Ustride; V += Vstride;
604
Uo += oUstride; Vo += oVstride;
608
TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
609
TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
612
ctx->D[0] = Yo[3] - last[3];
613
ctx->D[1] = Yo[3 + oYstride] - Yo[3];
614
ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
615
ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
617
for(j = 0; j < 4; j++){
619
for(i = 0; i < 4; i++){
620
Y[i] = Yo[i] + GET_TOK(ctx, TM2_UPD);
623
ctx->D[j] = last[3] - d;
629
static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
633
TM2_INIT_POINTERS_2();
635
mx = GET_TOK(ctx, TM2_MOT);
636
my = GET_TOK(ctx, TM2_MOT);
638
Yo += my * oYstride + mx;
639
Uo += (my >> 1) * oUstride + (mx >> 1);
640
Vo += (my >> 1) * oVstride + (mx >> 1);
643
for(j = 0; j < 2; j++){
644
for(i = 0; i < 2; i++){
648
U += Ustride; V += Vstride;
649
Uo += oUstride; Vo += oVstride;
653
TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
654
TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
657
for(j = 0; j < 4; j++){
658
for(i = 0; i < 4; i++){
664
/* calculate deltas */
666
ctx->D[0] = Y[3] - last[3];
667
ctx->D[1] = Y[3 + Ystride] - Y[3];
668
ctx->D[2] = Y[3 + Ystride * 2] - Y[3 + Ystride];
669
ctx->D[3] = Y[3 + Ystride * 3] - Y[3 + Ystride * 2];
670
for(i = 0; i < 4; i++)
671
last[i] = Y[i + Ystride * 3];
674
static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
683
bw = ctx->avctx->width >> 2;
684
bh = ctx->avctx->height >> 2;
686
for(i = 0; i < TM2_NUM_STREAMS; i++)
687
ctx->tok_ptrs[i] = 0;
689
if (ctx->tok_lens[TM2_TYPE]<bw*bh){
690
av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh);
694
memset(ctx->last, 0, 4 * bw * sizeof(int));
695
memset(ctx->clast, 0, 4 * bw * sizeof(int));
697
for(j = 0; j < bh; j++) {
698
memset(ctx->D, 0, 4 * sizeof(int));
699
memset(ctx->CD, 0, 4 * sizeof(int));
700
for(i = 0; i < bw; i++) {
701
type = GET_TOK(ctx, TM2_TYPE);
704
tm2_hi_res_block(ctx, p, i, j);
707
tm2_med_res_block(ctx, p, i, j);
710
tm2_low_res_block(ctx, p, i, j);
713
tm2_null_res_block(ctx, p, i, j);
716
tm2_update_block(ctx, p, i, j);
720
tm2_still_block(ctx, p, i, j);
724
tm2_motion_block(ctx, p, i, j);
728
av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type);
733
/* copy data from our buffer to AVFrame */
735
src = (ctx->cur?ctx->Y2:ctx->Y1);
736
for(j = 0; j < ctx->avctx->height; j++){
737
for(i = 0; i < ctx->avctx->width; i++){
738
Y[i] = av_clip_uint8(*src++);
743
src = (ctx->cur?ctx->U2:ctx->U1);
744
for(j = 0; j < (ctx->avctx->height + 1) >> 1; j++){
745
for(i = 0; i < (ctx->avctx->width + 1) >> 1; i++){
746
U[i] = av_clip_uint8(*src++);
751
src = (ctx->cur?ctx->V2:ctx->V1);
752
for(j = 0; j < (ctx->avctx->height + 1) >> 1; j++){
753
for(i = 0; i < (ctx->avctx->width + 1) >> 1; i++){
754
V[i] = av_clip_uint8(*src++);
762
static int decode_frame(AVCodecContext *avctx,
763
void *data, int *data_size,
764
uint8_t *buf, int buf_size)
766
TM2Context * const l = avctx->priv_data;
767
AVFrame * const p= (AVFrame*)&l->pic;
771
p->buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
772
if(avctx->reget_buffer(avctx, p) < 0){
773
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
777
l->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, buf_size >> 2);
778
skip = tm2_read_header(l, buf);
783
t = tm2_read_stream(l, buf + skip, TM2_C_HI);
787
t = tm2_read_stream(l, buf + skip, TM2_C_LO);
791
t = tm2_read_stream(l, buf + skip, TM2_L_HI);
795
t = tm2_read_stream(l, buf + skip, TM2_L_LO);
799
t = tm2_read_stream(l, buf + skip, TM2_UPD);
803
t = tm2_read_stream(l, buf + skip, TM2_MOT);
807
t = tm2_read_stream(l, buf + skip, TM2_TYPE);
810
p->key_frame = tm2_decode_blocks(l, p);
812
p->pict_type = FF_I_TYPE;
814
p->pict_type = FF_P_TYPE;
817
*data_size = sizeof(AVFrame);
818
*(AVFrame*)data = l->pic;
823
static int decode_init(AVCodecContext *avctx){
824
TM2Context * const l = avctx->priv_data;
827
if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
830
if((avctx->width & 3) || (avctx->height & 3)){
831
av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n");
837
avctx->has_b_frames = 0;
838
avctx->pix_fmt = PIX_FMT_YUV420P;
840
dsputil_init(&l->dsp, avctx);
842
l->last = av_malloc(4 * sizeof(int) * (avctx->width >> 2));
843
l->clast = av_malloc(4 * sizeof(int) * (avctx->width >> 2));
845
for(i = 0; i < TM2_NUM_STREAMS; i++) {
850
l->Y1 = av_malloc(sizeof(int) * avctx->width * avctx->height);
851
l->U1 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
852
l->V1 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
853
l->Y2 = av_malloc(sizeof(int) * avctx->width * avctx->height);
854
l->U2 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
855
l->V2 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
861
static int decode_end(AVCodecContext *avctx){
862
TM2Context * const l = avctx->priv_data;
869
for(i = 0; i < TM2_NUM_STREAMS; i++)
871
av_free(l->tokens[i]);
883
AVCodec truemotion2_decoder = {
886
CODEC_ID_TRUEMOTION2,