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.
29 #include "bitstream.h"
32 #define TM2_ESCAPE 0x80000000
34 /* Huffman-coded streams of different types of blocks */
35 enum TM2_STREAMS{ TM2_C_HI = 0, TM2_C_LO, TM2_L_HI, TM2_L_LO,
36 TM2_UPD, TM2_MOT, TM2_TYPE, TM2_NUM_STREAMS};
38 enum TM2_BLOCKS{ TM2_HI_RES = 0, TM2_MED_RES, TM2_LOW_RES, TM2_NULL_RES,
39 TM2_UPDATE, TM2_STILL, TM2_MOTION};
41 typedef struct TM2Context{
42 AVCodecContext *avctx;
49 int *tokens[TM2_NUM_STREAMS];
50 int tok_lens[TM2_NUM_STREAMS];
51 int tok_ptrs[TM2_NUM_STREAMS];
52 int deltas[TM2_NUM_STREAMS][TM2_DELTAS];
53 /* for blocks decoding */
59 /* data for current and previous frame */
60 int *Y1, *U1, *V1, *Y2, *U2, *V2;
65 * Huffman codes for each of streams
67 typedef struct TM2Codes{
68 VLC vlc; ///< table for FFmpeg bitstream reader
70 int *recode; ///< table for converting from code indexes to values
75 * structure for gathering Huffman codes information
77 typedef struct TM2Huff{
78 int val_bits; ///< length of literal
79 int max_bits; ///< maximum length of code
80 int min_bits; ///< minimum length of code
81 int nodes; ///< total number of nodes in tree
82 int num; ///< current number filled
83 int max_num; ///< total number of codes
84 int *nums; ///< literals
85 uint32_t *bits; ///< codes
86 int *lens; ///< codelengths
89 static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff)
91 if(length > huff->max_bits) {
92 av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n", huff->max_bits);
96 if(!get_bits1(&ctx->gb)) { /* literal */
100 if(huff->num >= huff->max_num) {
101 av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n");
104 huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits);
105 huff->bits[huff->num] = prefix;
106 huff->lens[huff->num] = length;
109 } else { /* non-terminal node */
110 if(tm2_read_tree(ctx, prefix << 1, length + 1, huff) == -1)
112 if(tm2_read_tree(ctx, (prefix << 1) | 1, length + 1, huff) == -1)
118 static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code)
123 huff.val_bits = get_bits(&ctx->gb, 5);
124 huff.max_bits = get_bits(&ctx->gb, 5);
125 huff.min_bits = get_bits(&ctx->gb, 5);
126 huff.nodes = get_bits_long(&ctx->gb, 17);
129 /* check for correct codes parameters */
130 if((huff.val_bits < 1) || (huff.val_bits > 32) ||
131 (huff.max_bits < 0) || (huff.max_bits > 32)) {
132 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal length: %i, max code length: %i\n",
133 huff.val_bits, huff.max_bits);
136 if((huff.nodes < 0) || (huff.nodes > 0x10000)) {
137 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree nodes: %i\n", huff.nodes);
141 if(huff.max_bits == 0)
144 /* allocate space for codes - it is exactly ceil(nodes / 2) entries */
145 huff.max_num = (huff.nodes + 1) >> 1;
146 huff.nums = av_mallocz(huff.max_num * sizeof(int));
147 huff.bits = av_mallocz(huff.max_num * sizeof(uint32_t));
148 huff.lens = av_mallocz(huff.max_num * sizeof(int));
150 if(tm2_read_tree(ctx, 0, 0, &huff) == -1)
153 if(huff.num != huff.max_num) {
154 av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n",
155 huff.num, huff.max_num);
159 /* convert codes to vlc_table */
163 res = init_vlc(&code->vlc, huff.max_bits, huff.max_num,
164 huff.lens, sizeof(int), sizeof(int),
165 huff.bits, sizeof(uint32_t), sizeof(uint32_t), 0);
167 av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
172 code->bits = huff.max_bits;
173 code->length = huff.max_num;
174 code->recode = av_malloc(code->length * sizeof(int));
175 for(i = 0; i < code->length; i++)
176 code->recode[i] = huff.nums[i];
179 /* free allocated memory */
187 static void tm2_free_codes(TM2Codes *code)
190 av_free(code->recode);
192 free_vlc(&code->vlc);
195 static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code)
198 val = get_vlc2(gb, code->vlc.table, code->bits, 1);
199 return code->recode[val];
202 static inline int tm2_read_header(TM2Context *ctx, uint8_t *buf)
210 magic = AV_RL32(buf);
213 if(magic == 0x00000100) { /* old header */
214 /* av_log (ctx->avctx, AV_LOG_ERROR, "TM2 old header: not implemented (yet)\n"); */
216 } else if(magic == 0x00000101) { /* new header */
217 int w, h, size, flags, xr, yr;
219 length = AV_RL32(buf);
222 init_get_bits(&ctx->gb, buf, 32 * 8);
223 size = get_bits_long(&ctx->gb, 31);
224 h = get_bits(&ctx->gb, 15);
225 w = get_bits(&ctx->gb, 15);
226 flags = get_bits_long(&ctx->gb, 31);
227 yr = get_bits(&ctx->gb, 9);
228 xr = get_bits(&ctx->gb, 9);
232 av_log (ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08X\n", magic);
239 static int tm2_read_deltas(TM2Context *ctx, int stream_id) {
243 d = get_bits(&ctx->gb, 9);
244 mb = get_bits(&ctx->gb, 5);
246 if((d < 1) || (d > TM2_DELTAS) || (mb < 1) || (mb > 32)) {
247 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect delta table: %i deltas x %i bits\n", d, mb);
251 for(i = 0; i < d; i++) {
252 v = get_bits_long(&ctx->gb, mb);
253 if(v & (1 << (mb - 1)))
254 ctx->deltas[stream_id][i] = v - (1 << mb);
256 ctx->deltas[stream_id][i] = v;
258 for(; i < TM2_DELTAS; i++)
259 ctx->deltas[stream_id][i] = 0;
264 static int tm2_read_stream(TM2Context *ctx, uint8_t *buf, int stream_id) {
271 /* get stream length in dwords */
272 len = AV_RB32(buf); buf += 4; cur += 4;
278 toks = AV_RB32(buf); buf += 4; cur += 4;
280 len = AV_RB32(buf); buf += 4; cur += 4;
281 if(len == TM2_ESCAPE) {
282 len = AV_RB32(buf); buf += 4; cur += 4;
285 init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
286 if(tm2_read_deltas(ctx, stream_id) == -1)
288 buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
289 cur += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
292 /* skip unused fields */
293 if(AV_RB32(buf) == TM2_ESCAPE) {
294 buf += 4; cur += 4; /* some unknown length - could be escaped too */
297 buf += 4; cur += 4; /* unused by decoder */
299 init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
300 if(tm2_build_huff_table(ctx, &codes) == -1)
302 buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
303 cur += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
306 /* check if we have sane number of tokens */
307 if((toks < 0) || (toks > 0xFFFFFF)){
308 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
309 tm2_free_codes(&codes);
312 ctx->tokens[stream_id] = av_realloc(ctx->tokens[stream_id], toks * sizeof(int));
313 ctx->tok_lens[stream_id] = toks;
314 len = AV_RB32(buf); buf += 4; cur += 4;
316 init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
317 for(i = 0; i < toks; i++)
318 ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes);
320 for(i = 0; i < toks; i++)
321 ctx->tokens[stream_id][i] = codes.recode[0];
323 tm2_free_codes(&codes);
328 static inline int GET_TOK(TM2Context *ctx,int type) {
329 if(ctx->tok_ptrs[type] >= ctx->tok_lens[type]) {
330 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]);
334 return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]];
335 return ctx->tokens[type][ctx->tok_ptrs[type]++];
338 /* blocks decoding routines */
340 /* common Y, U, V pointers initialisation */
341 #define TM2_INIT_POINTERS() \
344 int Ystride, Ustride, Vstride;\
346 Ystride = ctx->avctx->width;\
347 Vstride = (ctx->avctx->width + 1) >> 1;\
348 Ustride = (ctx->avctx->width + 1) >> 1;\
349 Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\
350 V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\
351 U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\
352 last = ctx->last + bx * 4;\
353 clast = ctx->clast + bx * 4;
355 #define TM2_INIT_POINTERS_2() \
357 int oYstride, oUstride, oVstride;\
359 TM2_INIT_POINTERS();\
363 Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\
364 Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\
365 Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2;
367 /* recalculate last and delta values for next blocks */
368 #define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\
369 CD[0] = (CHR[1] - 128) - last[1];\
370 CD[1] = (int)CHR[stride + 1] - (int)CHR[1];\
371 last[0] = (int)CHR[stride + 0] - 128;\
372 last[1] = (int)CHR[stride + 1] - 128;}
374 /* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */
375 static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last)
380 for(j = 0; j < 4; j++){
382 for(i = 0; i < 4; i++){
383 d = deltas[i + j * 4];
386 Y[i] = av_clip_uint8(last[i]);
393 static inline void tm2_high_chroma(int *data, int stride, int *last, int *CD, int *deltas)
396 for(j = 0; j < 2; j++){
397 for(i = 0; i < 2; i++){
398 CD[j] += deltas[i + j * 2];
400 data[i] = last[i] + 128;
406 static inline void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx)
416 t = (CD[0] + CD[1]) >> 1;
417 l = (prev - CD[0] - CD[1] + clast[1]) >> 1;
418 CD[1] = CD[0] + CD[1] - t;
422 tm2_high_chroma(data, stride, clast, CD, deltas);
425 static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
432 for(i = 0; i < 4; i++) {
433 deltas[i] = GET_TOK(ctx, TM2_C_HI);
434 deltas[i + 4] = GET_TOK(ctx, TM2_C_HI);
436 tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas);
437 tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4);
440 for(i = 0; i < 16; i++)
441 deltas[i] = GET_TOK(ctx, TM2_L_HI);
443 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
446 static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
453 deltas[0] = GET_TOK(ctx, TM2_C_LO);
454 deltas[1] = deltas[2] = deltas[3] = 0;
455 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
457 deltas[0] = GET_TOK(ctx, TM2_C_LO);
458 deltas[1] = deltas[2] = deltas[3] = 0;
459 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
462 for(i = 0; i < 16; i++)
463 deltas[i] = GET_TOK(ctx, TM2_L_HI);
465 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
468 static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
476 deltas[0] = GET_TOK(ctx, TM2_C_LO);
477 deltas[1] = deltas[2] = deltas[3] = 0;
478 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
480 deltas[0] = GET_TOK(ctx, TM2_C_LO);
481 deltas[1] = deltas[2] = deltas[3] = 0;
482 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
485 for(i = 0; i < 16; i++)
488 deltas[ 0] = GET_TOK(ctx, TM2_L_LO);
489 deltas[ 2] = GET_TOK(ctx, TM2_L_LO);
490 deltas[ 8] = GET_TOK(ctx, TM2_L_LO);
491 deltas[10] = GET_TOK(ctx, TM2_L_LO);
494 last[0] = (last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1;
496 last[0] = (last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1;
497 last[2] = (last[1] + last[3]) >> 1;
499 t1 = ctx->D[0] + ctx->D[1];
501 ctx->D[1] = t1 - (t1 >> 1);
502 t2 = ctx->D[2] + ctx->D[3];
504 ctx->D[3] = t2 - (t2 >> 1);
506 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
509 static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
513 int left, right, diff;
518 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
519 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
521 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
522 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
525 for(i = 0; i < 16; i++)
528 ct = ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3];
531 left = last[-1] - ct;
537 last[0] = left + (diff >> 2);
538 last[1] = left + (diff >> 1);
539 last[2] = right - (diff >> 2);
544 ctx->D[0] = (tp + (ct >> 2)) - left;
546 ctx->D[1] = (tp + (ct >> 1)) - left;
548 ctx->D[2] = ((tp + ct) - (ct >> 2)) - left;
550 ctx->D[3] = (tp + ct) - left;
552 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
555 static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
558 TM2_INIT_POINTERS_2();
561 for(j = 0; j < 2; j++){
562 for(i = 0; i < 2; i++){
566 U += Ustride; V += Vstride;
567 Uo += oUstride; Vo += oVstride;
571 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
572 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
575 ctx->D[0] = Yo[3] - last[3];
576 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
577 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
578 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
580 for(j = 0; j < 4; j++){
581 for(i = 0; i < 4; i++){
590 static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
594 TM2_INIT_POINTERS_2();
597 for(j = 0; j < 2; j++){
598 for(i = 0; i < 2; i++){
599 U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD);
600 V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD);
602 U += Ustride; V += Vstride;
603 Uo += oUstride; Vo += oVstride;
607 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
608 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
611 ctx->D[0] = Yo[3] - last[3];
612 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
613 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
614 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
616 for(j = 0; j < 4; j++){
618 for(i = 0; i < 4; i++){
619 Y[i] = Yo[i] + GET_TOK(ctx, TM2_UPD);
622 ctx->D[j] = last[3] - d;
628 static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
632 TM2_INIT_POINTERS_2();
634 mx = GET_TOK(ctx, TM2_MOT);
635 my = GET_TOK(ctx, TM2_MOT);
637 Yo += my * oYstride + mx;
638 Uo += (my >> 1) * oUstride + (mx >> 1);
639 Vo += (my >> 1) * oVstride + (mx >> 1);
642 for(j = 0; j < 2; j++){
643 for(i = 0; i < 2; i++){
647 U += Ustride; V += Vstride;
648 Uo += oUstride; Vo += oVstride;
652 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
653 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
656 for(j = 0; j < 4; j++){
657 for(i = 0; i < 4; i++){
663 /* calculate deltas */
665 ctx->D[0] = Y[3] - last[3];
666 ctx->D[1] = Y[3 + Ystride] - Y[3];
667 ctx->D[2] = Y[3 + Ystride * 2] - Y[3 + Ystride];
668 ctx->D[3] = Y[3 + Ystride * 3] - Y[3 + Ystride * 2];
669 for(i = 0; i < 4; i++)
670 last[i] = Y[i + Ystride * 3];
673 static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
682 bw = ctx->avctx->width >> 2;
683 bh = ctx->avctx->height >> 2;
685 for(i = 0; i < TM2_NUM_STREAMS; i++)
686 ctx->tok_ptrs[i] = 0;
688 if (ctx->tok_lens[TM2_TYPE]<bw*bh){
689 av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh);
693 memset(ctx->last, 0, 4 * bw * sizeof(int));
694 memset(ctx->clast, 0, 4 * bw * sizeof(int));
696 for(j = 0; j < bh; j++) {
697 memset(ctx->D, 0, 4 * sizeof(int));
698 memset(ctx->CD, 0, 4 * sizeof(int));
699 for(i = 0; i < bw; i++) {
700 type = GET_TOK(ctx, TM2_TYPE);
703 tm2_hi_res_block(ctx, p, i, j);
706 tm2_med_res_block(ctx, p, i, j);
709 tm2_low_res_block(ctx, p, i, j);
712 tm2_null_res_block(ctx, p, i, j);
715 tm2_update_block(ctx, p, i, j);
719 tm2_still_block(ctx, p, i, j);
723 tm2_motion_block(ctx, p, i, j);
727 av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type);
732 /* copy data from our buffer to AVFrame */
734 src = (ctx->cur?ctx->Y2:ctx->Y1);
735 for(j = 0; j < ctx->avctx->height; j++){
736 for(i = 0; i < ctx->avctx->width; i++){
737 Y[i] = av_clip_uint8(*src++);
742 src = (ctx->cur?ctx->U2:ctx->U1);
743 for(j = 0; j < (ctx->avctx->height + 1) >> 1; j++){
744 for(i = 0; i < (ctx->avctx->width + 1) >> 1; i++){
745 U[i] = av_clip_uint8(*src++);
750 src = (ctx->cur?ctx->V2:ctx->V1);
751 for(j = 0; j < (ctx->avctx->height + 1) >> 1; j++){
752 for(i = 0; i < (ctx->avctx->width + 1) >> 1; i++){
753 V[i] = av_clip_uint8(*src++);
761 static int decode_frame(AVCodecContext *avctx,
762 void *data, int *data_size,
763 uint8_t *buf, int buf_size)
765 TM2Context * const l = avctx->priv_data;
766 AVFrame * const p= (AVFrame*)&l->pic;
770 p->buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
771 if(avctx->reget_buffer(avctx, p) < 0){
772 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
776 l->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, buf_size >> 2);
777 skip = tm2_read_header(l, buf);
782 t = tm2_read_stream(l, buf + skip, TM2_C_HI);
786 t = tm2_read_stream(l, buf + skip, TM2_C_LO);
790 t = tm2_read_stream(l, buf + skip, TM2_L_HI);
794 t = tm2_read_stream(l, buf + skip, TM2_L_LO);
798 t = tm2_read_stream(l, buf + skip, TM2_UPD);
802 t = tm2_read_stream(l, buf + skip, TM2_MOT);
806 t = tm2_read_stream(l, buf + skip, TM2_TYPE);
809 p->key_frame = tm2_decode_blocks(l, p);
811 p->pict_type = FF_I_TYPE;
813 p->pict_type = FF_P_TYPE;
816 *data_size = sizeof(AVFrame);
817 *(AVFrame*)data = l->pic;
822 static int decode_init(AVCodecContext *avctx){
823 TM2Context * const l = avctx->priv_data;
826 if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
829 if((avctx->width & 3) || (avctx->height & 3)){
830 av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n");
836 avctx->pix_fmt = PIX_FMT_YUV420P;
838 dsputil_init(&l->dsp, avctx);
840 l->last = av_malloc(4 * sizeof(int) * (avctx->width >> 2));
841 l->clast = av_malloc(4 * sizeof(int) * (avctx->width >> 2));
843 for(i = 0; i < TM2_NUM_STREAMS; i++) {
848 l->Y1 = av_malloc(sizeof(int) * avctx->width * avctx->height);
849 l->U1 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
850 l->V1 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
851 l->Y2 = av_malloc(sizeof(int) * avctx->width * avctx->height);
852 l->U2 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
853 l->V2 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
859 static int decode_end(AVCodecContext *avctx){
860 TM2Context * const l = avctx->priv_data;
867 for(i = 0; i < TM2_NUM_STREAMS; i++)
869 av_free(l->tokens[i]);
881 AVCodec truemotion2_decoder = {
884 CODEC_ID_TRUEMOTION2,