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
24 * Duck TrueMotion2 decoder.
31 #define TM2_ESCAPE 0x80000000
33 /* Huffman-coded streams of different types of blocks */
34 enum TM2_STREAMS{ TM2_C_HI = 0, TM2_C_LO, TM2_L_HI, TM2_L_LO,
35 TM2_UPD, TM2_MOT, TM2_TYPE, TM2_NUM_STREAMS};
37 enum TM2_BLOCKS{ TM2_HI_RES = 0, TM2_MED_RES, TM2_LOW_RES, TM2_NULL_RES,
38 TM2_UPDATE, TM2_STILL, TM2_MOTION};
40 typedef struct TM2Context{
41 AVCodecContext *avctx;
48 int *tokens[TM2_NUM_STREAMS];
49 int tok_lens[TM2_NUM_STREAMS];
50 int tok_ptrs[TM2_NUM_STREAMS];
51 int deltas[TM2_NUM_STREAMS][TM2_DELTAS];
52 /* for blocks decoding */
58 /* data for current and previous frame */
59 int *Y1, *U1, *V1, *Y2, *U2, *V2;
64 * Huffman codes for each of streams
66 typedef struct TM2Codes{
67 VLC vlc; ///< table for FFmpeg bitstream reader
69 int *recode; ///< table for converting from code indexes to values
74 * structure for gathering Huffman codes information
76 typedef struct TM2Huff{
77 int val_bits; ///< length of literal
78 int max_bits; ///< maximum length of code
79 int min_bits; ///< minimum length of code
80 int nodes; ///< total number of nodes in tree
81 int num; ///< current number filled
82 int max_num; ///< total number of codes
83 int *nums; ///< literals
84 uint32_t *bits; ///< codes
85 int *lens; ///< codelengths
88 static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff)
90 if(length > huff->max_bits) {
91 av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n", huff->max_bits);
95 if(!get_bits1(&ctx->gb)) { /* literal */
99 if(huff->num >= huff->max_num) {
100 av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n");
103 huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits);
104 huff->bits[huff->num] = prefix;
105 huff->lens[huff->num] = length;
108 } else { /* non-terminal node */
109 if(tm2_read_tree(ctx, prefix << 1, length + 1, huff) == -1)
111 if(tm2_read_tree(ctx, (prefix << 1) | 1, length + 1, huff) == -1)
117 static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code)
122 huff.val_bits = get_bits(&ctx->gb, 5);
123 huff.max_bits = get_bits(&ctx->gb, 5);
124 huff.min_bits = get_bits(&ctx->gb, 5);
125 huff.nodes = get_bits_long(&ctx->gb, 17);
128 /* check for correct codes parameters */
129 if((huff.val_bits < 1) || (huff.val_bits > 32) ||
130 (huff.max_bits < 0) || (huff.max_bits > 32)) {
131 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal length: %i, max code length: %i\n",
132 huff.val_bits, huff.max_bits);
135 if((huff.nodes < 0) || (huff.nodes > 0x10000)) {
136 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree nodes: %i\n", huff.nodes);
140 if(huff.max_bits == 0)
143 /* allocate space for codes - it is exactly ceil(nodes / 2) entries */
144 huff.max_num = (huff.nodes + 1) >> 1;
145 huff.nums = av_mallocz(huff.max_num * sizeof(int));
146 huff.bits = av_mallocz(huff.max_num * sizeof(uint32_t));
147 huff.lens = av_mallocz(huff.max_num * sizeof(int));
149 if(tm2_read_tree(ctx, 0, 0, &huff) == -1)
152 if(huff.num != huff.max_num) {
153 av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n",
154 huff.num, huff.max_num);
158 /* convert codes to vlc_table */
162 res = init_vlc(&code->vlc, huff.max_bits, huff.max_num,
163 huff.lens, sizeof(int), sizeof(int),
164 huff.bits, sizeof(uint32_t), sizeof(uint32_t), 0);
166 av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
171 code->bits = huff.max_bits;
172 code->length = huff.max_num;
173 code->recode = av_malloc(code->length * sizeof(int));
174 for(i = 0; i < code->length; i++)
175 code->recode[i] = huff.nums[i];
178 /* free allocated memory */
186 static void tm2_free_codes(TM2Codes *code)
188 av_free(code->recode);
190 free_vlc(&code->vlc);
193 static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code)
196 val = get_vlc2(gb, code->vlc.table, code->bits, 1);
197 return code->recode[val];
200 static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
207 magic = AV_RL32(buf);
210 if(magic == 0x00000100) { /* old header */
211 /* av_log (ctx->avctx, AV_LOG_ERROR, "TM2 old header: not implemented (yet)\n"); */
213 } else if(magic == 0x00000101) { /* new header */
216 av_log (ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08X\n", magic);
223 static int tm2_read_deltas(TM2Context *ctx, int stream_id) {
227 d = get_bits(&ctx->gb, 9);
228 mb = get_bits(&ctx->gb, 5);
230 if((d < 1) || (d > TM2_DELTAS) || (mb < 1) || (mb > 32)) {
231 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect delta table: %i deltas x %i bits\n", d, mb);
235 for(i = 0; i < d; i++) {
236 v = get_bits_long(&ctx->gb, mb);
237 if(v & (1 << (mb - 1)))
238 ctx->deltas[stream_id][i] = v - (1 << mb);
240 ctx->deltas[stream_id][i] = v;
242 for(; i < TM2_DELTAS; i++)
243 ctx->deltas[stream_id][i] = 0;
248 static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size)
256 /* get stream length in dwords */
257 len = AV_RB32(buf); buf += 4; cur += 4;
263 if (len >= INT_MAX/4-1 || len < 0 || len > buf_size) {
264 av_log(ctx->avctx, AV_LOG_ERROR, "Error, invalid stream size.\n");
268 toks = AV_RB32(buf); buf += 4; cur += 4;
270 len = AV_RB32(buf); buf += 4; cur += 4;
271 if(len == TM2_ESCAPE) {
272 len = AV_RB32(buf); buf += 4; cur += 4;
275 init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
276 if(tm2_read_deltas(ctx, stream_id) == -1)
278 buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
279 cur += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
282 /* skip unused fields */
283 if(AV_RB32(buf) == TM2_ESCAPE) {
284 buf += 4; cur += 4; /* some unknown length - could be escaped too */
287 buf += 4; cur += 4; /* unused by decoder */
289 init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
290 if(tm2_build_huff_table(ctx, &codes) == -1)
292 buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
293 cur += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
296 /* check if we have sane number of tokens */
297 if((toks < 0) || (toks > 0xFFFFFF)){
298 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
299 tm2_free_codes(&codes);
302 ctx->tokens[stream_id] = av_realloc(ctx->tokens[stream_id], toks * sizeof(int));
303 ctx->tok_lens[stream_id] = toks;
304 len = AV_RB32(buf); buf += 4; cur += 4;
306 init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
307 for(i = 0; i < toks; i++) {
308 if (get_bits_left(&ctx->gb) <= 0) {
309 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
312 ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes);
315 for(i = 0; i < toks; i++)
316 ctx->tokens[stream_id][i] = codes.recode[0];
318 tm2_free_codes(&codes);
323 static inline int GET_TOK(TM2Context *ctx,int type) {
324 if(ctx->tok_ptrs[type] >= ctx->tok_lens[type]) {
325 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]);
329 return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]];
330 return ctx->tokens[type][ctx->tok_ptrs[type]++];
333 /* blocks decoding routines */
335 /* common Y, U, V pointers initialisation */
336 #define TM2_INIT_POINTERS() \
339 int Ystride, Ustride, Vstride;\
341 Ystride = ctx->avctx->width;\
342 Vstride = (ctx->avctx->width + 1) >> 1;\
343 Ustride = (ctx->avctx->width + 1) >> 1;\
344 Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\
345 V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\
346 U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\
347 last = ctx->last + bx * 4;\
348 clast = ctx->clast + bx * 4;
350 #define TM2_INIT_POINTERS_2() \
352 int oYstride, oUstride, oVstride;\
354 TM2_INIT_POINTERS();\
358 Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\
359 Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\
360 Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2;
362 /* recalculate last and delta values for next blocks */
363 #define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\
364 CD[0] = CHR[1] - last[1];\
365 CD[1] = (int)CHR[stride + 1] - (int)CHR[1];\
366 last[0] = (int)CHR[stride + 0];\
367 last[1] = (int)CHR[stride + 1];}
369 /* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */
370 static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last)
375 for(j = 0; j < 4; j++){
377 for(i = 0; i < 4; i++){
378 d = deltas[i + j * 4];
381 Y[i] = av_clip_uint8(last[i]);
388 static inline void tm2_high_chroma(int *data, int stride, int *last, int *CD, int *deltas)
391 for(j = 0; j < 2; j++){
392 for(i = 0; i < 2; i++){
393 CD[j] += deltas[i + j * 2];
401 static inline void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx)
411 t = (CD[0] + CD[1]) >> 1;
412 l = (prev - CD[0] - CD[1] + clast[1]) >> 1;
413 CD[1] = CD[0] + CD[1] - t;
417 tm2_high_chroma(data, stride, clast, CD, deltas);
420 static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
427 for(i = 0; i < 4; i++) {
428 deltas[i] = GET_TOK(ctx, TM2_C_HI);
429 deltas[i + 4] = GET_TOK(ctx, TM2_C_HI);
431 tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas);
432 tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4);
435 for(i = 0; i < 16; i++)
436 deltas[i] = GET_TOK(ctx, TM2_L_HI);
438 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
441 static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
448 deltas[0] = GET_TOK(ctx, TM2_C_LO);
449 deltas[1] = deltas[2] = deltas[3] = 0;
450 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
452 deltas[0] = GET_TOK(ctx, TM2_C_LO);
453 deltas[1] = deltas[2] = deltas[3] = 0;
454 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
457 for(i = 0; i < 16; i++)
458 deltas[i] = GET_TOK(ctx, TM2_L_HI);
460 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
463 static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
471 deltas[0] = GET_TOK(ctx, TM2_C_LO);
472 deltas[1] = deltas[2] = deltas[3] = 0;
473 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
475 deltas[0] = GET_TOK(ctx, TM2_C_LO);
476 deltas[1] = deltas[2] = deltas[3] = 0;
477 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
480 for(i = 0; i < 16; i++)
483 deltas[ 0] = GET_TOK(ctx, TM2_L_LO);
484 deltas[ 2] = GET_TOK(ctx, TM2_L_LO);
485 deltas[ 8] = GET_TOK(ctx, TM2_L_LO);
486 deltas[10] = GET_TOK(ctx, TM2_L_LO);
489 last[0] = (last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1;
491 last[0] = (last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1;
492 last[2] = (last[1] + last[3]) >> 1;
494 t1 = ctx->D[0] + ctx->D[1];
496 ctx->D[1] = t1 - (t1 >> 1);
497 t2 = ctx->D[2] + ctx->D[3];
499 ctx->D[3] = t2 - (t2 >> 1);
501 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
504 static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
508 int left, right, diff;
513 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
514 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
516 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
517 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
520 for(i = 0; i < 16; i++)
523 ct = ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3];
526 left = last[-1] - ct;
532 last[0] = left + (diff >> 2);
533 last[1] = left + (diff >> 1);
534 last[2] = right - (diff >> 2);
539 ctx->D[0] = (tp + (ct >> 2)) - left;
541 ctx->D[1] = (tp + (ct >> 1)) - left;
543 ctx->D[2] = ((tp + ct) - (ct >> 2)) - left;
545 ctx->D[3] = (tp + ct) - left;
547 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
550 static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
553 TM2_INIT_POINTERS_2();
556 for(j = 0; j < 2; j++){
557 for(i = 0; i < 2; i++){
561 U += Ustride; V += Vstride;
562 Uo += oUstride; Vo += oVstride;
566 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
567 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
570 ctx->D[0] = Yo[3] - last[3];
571 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
572 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
573 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
575 for(j = 0; j < 4; j++){
576 for(i = 0; i < 4; i++){
585 static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
589 TM2_INIT_POINTERS_2();
592 for(j = 0; j < 2; j++){
593 for(i = 0; i < 2; i++){
594 U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD);
595 V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD);
597 U += Ustride; V += Vstride;
598 Uo += oUstride; Vo += oVstride;
602 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
603 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
606 ctx->D[0] = Yo[3] - last[3];
607 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
608 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
609 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
611 for(j = 0; j < 4; j++){
613 for(i = 0; i < 4; i++){
614 Y[i] = Yo[i] + GET_TOK(ctx, TM2_UPD);
617 ctx->D[j] = last[3] - d;
623 static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
627 TM2_INIT_POINTERS_2();
629 mx = GET_TOK(ctx, TM2_MOT);
630 my = GET_TOK(ctx, TM2_MOT);
632 Yo += my * oYstride + mx;
633 Uo += (my >> 1) * oUstride + (mx >> 1);
634 Vo += (my >> 1) * oVstride + (mx >> 1);
637 for(j = 0; j < 2; j++){
638 for(i = 0; i < 2; i++){
642 U += Ustride; V += Vstride;
643 Uo += oUstride; Vo += oVstride;
647 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
648 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
651 for(j = 0; j < 4; j++){
652 for(i = 0; i < 4; i++){
658 /* calculate deltas */
660 ctx->D[0] = Y[3] - last[3];
661 ctx->D[1] = Y[3 + Ystride] - Y[3];
662 ctx->D[2] = Y[3 + Ystride * 2] - Y[3 + Ystride];
663 ctx->D[3] = Y[3 + Ystride * 3] - Y[3 + Ystride * 2];
664 for(i = 0; i < 4; i++)
665 last[i] = Y[i + Ystride * 3];
668 static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
677 bw = ctx->avctx->width >> 2;
678 bh = ctx->avctx->height >> 2;
680 for(i = 0; i < TM2_NUM_STREAMS; i++)
681 ctx->tok_ptrs[i] = 0;
683 if (ctx->tok_lens[TM2_TYPE]<bw*bh){
684 av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh);
688 memset(ctx->last, 0, 4 * bw * sizeof(int));
689 memset(ctx->clast, 0, 4 * bw * sizeof(int));
691 for(j = 0; j < bh; j++) {
692 memset(ctx->D, 0, 4 * sizeof(int));
693 memset(ctx->CD, 0, 4 * sizeof(int));
694 for(i = 0; i < bw; i++) {
695 type = GET_TOK(ctx, TM2_TYPE);
698 tm2_hi_res_block(ctx, p, i, j);
701 tm2_med_res_block(ctx, p, i, j);
704 tm2_low_res_block(ctx, p, i, j);
707 tm2_null_res_block(ctx, p, i, j);
710 tm2_update_block(ctx, p, i, j);
714 tm2_still_block(ctx, p, i, j);
718 tm2_motion_block(ctx, p, i, j);
722 av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type);
727 /* copy data from our buffer to AVFrame */
728 Y = (ctx->cur?ctx->Y2:ctx->Y1);
729 U = (ctx->cur?ctx->U2:ctx->U1);
730 V = (ctx->cur?ctx->V2:ctx->V1);
732 for(j = 0; j < ctx->avctx->height; j++){
733 for(i = 0; i < ctx->avctx->width; i++){
734 int y = Y[i], u = U[i >> 1], v = V[i >> 1];
735 dst[3*i+0] = av_clip_uint8(y + v);
736 dst[3*i+1] = av_clip_uint8(y);
737 dst[3*i+2] = av_clip_uint8(y + u);
739 Y += ctx->avctx->width;
741 U += ctx->avctx->width >> 1;
742 V += ctx->avctx->width >> 1;
744 dst += p->linesize[0];
750 static const int tm2_stream_order[TM2_NUM_STREAMS] = {
751 TM2_C_HI, TM2_C_LO, TM2_L_HI, TM2_L_LO, TM2_UPD, TM2_MOT, TM2_TYPE
754 static int decode_frame(AVCodecContext *avctx,
755 void *data, int *data_size,
758 const uint8_t *buf = avpkt->data;
759 int buf_size = avpkt->size;
760 TM2Context * const l = avctx->priv_data;
761 AVFrame * const p= (AVFrame*)&l->pic;
765 swbuf = av_malloc(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
767 av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");
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");
778 l->dsp.bswap_buf((uint32_t*)swbuf, (const uint32_t*)buf, buf_size >> 2);
779 skip = tm2_read_header(l, swbuf);
786 for(i = 0; i < TM2_NUM_STREAMS; i++){
787 t = tm2_read_stream(l, swbuf + skip, tm2_stream_order[i], buf_size);
794 p->key_frame = tm2_decode_blocks(l, p);
796 p->pict_type = AV_PICTURE_TYPE_I;
798 p->pict_type = AV_PICTURE_TYPE_P;
801 *data_size = sizeof(AVFrame);
802 *(AVFrame*)data = l->pic;
808 static av_cold int decode_init(AVCodecContext *avctx){
809 TM2Context * const l = avctx->priv_data;
812 if((avctx->width & 3) || (avctx->height & 3)){
813 av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n");
819 avctx->pix_fmt = PIX_FMT_BGR24;
820 avcodec_get_frame_defaults(&l->pic);
822 dsputil_init(&l->dsp, avctx);
824 l->last = av_malloc(4 * sizeof(int) * (avctx->width >> 2));
825 l->clast = av_malloc(4 * sizeof(int) * (avctx->width >> 2));
827 for(i = 0; i < TM2_NUM_STREAMS; i++) {
832 l->Y1 = av_malloc(sizeof(int) * avctx->width * avctx->height);
833 l->U1 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
834 l->V1 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
835 l->Y2 = av_malloc(sizeof(int) * avctx->width * avctx->height);
836 l->U2 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
837 l->V2 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
843 static av_cold int decode_end(AVCodecContext *avctx){
844 TM2Context * const l = avctx->priv_data;
845 AVFrame *pic = &l->pic;
850 for(i = 0; i < TM2_NUM_STREAMS; i++)
851 av_free(l->tokens[i]);
862 avctx->release_buffer(avctx, pic);
867 AVCodec ff_truemotion2_decoder = {
870 CODEC_ID_TRUEMOTION2,
877 .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0"),