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 #include "bytestream.h"
35 #define TM2_ESCAPE 0x80000000
38 /* Huffman-coded streams of different types of blocks */
61 typedef struct TM2Context {
62 AVCodecContext *avctx;
73 int *tokens[TM2_NUM_STREAMS];
74 int tok_lens[TM2_NUM_STREAMS];
75 int tok_ptrs[TM2_NUM_STREAMS];
76 int deltas[TM2_NUM_STREAMS][TM2_DELTAS];
77 /* for blocks decoding */
83 /* data for current and previous frame */
84 int *Y1_base, *U1_base, *V1_base, *Y2_base, *U2_base, *V2_base;
85 int *Y1, *U1, *V1, *Y2, *U2, *V2;
86 int y_stride, uv_stride;
91 * Huffman codes for each of streams
93 typedef struct TM2Codes {
94 VLC vlc; ///< table for FFmpeg bitstream reader
96 int *recode; ///< table for converting from code indexes to values
101 * structure for gathering Huffman codes information
103 typedef struct TM2Huff {
104 int val_bits; ///< length of literal
105 int max_bits; ///< maximum length of code
106 int min_bits; ///< minimum length of code
107 int nodes; ///< total number of nodes in tree
108 int num; ///< current number filled
109 int max_num; ///< total number of codes
110 int *nums; ///< literals
111 uint32_t *bits; ///< codes
112 int *lens; ///< codelengths
115 static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff)
118 if (length > huff->max_bits) {
119 av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n",
121 return AVERROR_INVALIDDATA;
124 if (!get_bits1(&ctx->gb)) { /* literal */
128 if (huff->num >= huff->max_num) {
129 av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n");
130 return AVERROR_INVALIDDATA;
132 huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits);
133 huff->bits[huff->num] = prefix;
134 huff->lens[huff->num] = length;
137 } else { /* non-terminal node */
138 if ((ret = tm2_read_tree(ctx, prefix << 1, length + 1, huff)) < 0)
140 if ((ret = tm2_read_tree(ctx, (prefix << 1) | 1, length + 1, huff)) < 0)
146 static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code)
151 huff.val_bits = get_bits(&ctx->gb, 5);
152 huff.max_bits = get_bits(&ctx->gb, 5);
153 huff.min_bits = get_bits(&ctx->gb, 5);
154 huff.nodes = get_bits_long(&ctx->gb, 17);
157 /* check for correct codes parameters */
158 if ((huff.val_bits < 1) || (huff.val_bits > 32) ||
159 (huff.max_bits < 0) || (huff.max_bits > 25)) {
160 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal "
161 "length: %i, max code length: %i\n", huff.val_bits, huff.max_bits);
162 return AVERROR_INVALIDDATA;
164 if ((huff.nodes <= 0) || (huff.nodes > 0x10000)) {
165 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree "
166 "nodes: %i\n", huff.nodes);
167 return AVERROR_INVALIDDATA;
170 if (huff.max_bits == 0)
173 /* allocate space for codes - it is exactly ceil(nodes / 2) entries */
174 huff.max_num = (huff.nodes + 1) >> 1;
175 huff.nums = av_calloc(huff.max_num, sizeof(int));
176 huff.bits = av_calloc(huff.max_num, sizeof(uint32_t));
177 huff.lens = av_calloc(huff.max_num, sizeof(int));
179 if (!huff.nums || !huff.bits || !huff.lens) {
180 res = AVERROR(ENOMEM);
184 res = tm2_read_tree(ctx, 0, 0, &huff);
186 if (huff.num != huff.max_num) {
187 av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n",
188 huff.num, huff.max_num);
189 res = AVERROR_INVALIDDATA;
192 /* convert codes to vlc_table */
196 res = init_vlc(&code->vlc, huff.max_bits, huff.max_num,
197 huff.lens, sizeof(int), sizeof(int),
198 huff.bits, sizeof(uint32_t), sizeof(uint32_t), 0);
200 av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
202 code->bits = huff.max_bits;
203 code->length = huff.max_num;
204 code->recode = av_malloc_array(code->length, sizeof(int));
206 res = AVERROR(ENOMEM);
209 for (i = 0; i < code->length; i++)
210 code->recode[i] = huff.nums[i];
215 /* free allocated memory */
223 static void tm2_free_codes(TM2Codes *code)
225 av_free(code->recode);
227 ff_free_vlc(&code->vlc);
230 static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code)
233 val = get_vlc2(gb, code->vlc.table, code->bits, 1);
236 return code->recode[val];
239 #define TM2_OLD_HEADER_MAGIC 0x00000100
240 #define TM2_NEW_HEADER_MAGIC 0x00000101
242 static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
244 uint32_t magic = AV_RL32(buf);
247 case TM2_OLD_HEADER_MAGIC:
248 avpriv_request_sample(ctx->avctx, "Old TM2 header");
250 case TM2_NEW_HEADER_MAGIC:
253 av_log(ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08"PRIX32"\n",
255 return AVERROR_INVALIDDATA;
259 static int tm2_read_deltas(TM2Context *ctx, int stream_id)
264 d = get_bits(&ctx->gb, 9);
265 mb = get_bits(&ctx->gb, 5);
268 if ((d < 1) || (d > TM2_DELTAS) || (mb < 1)) {
269 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect delta table: %i deltas x %i bits\n", d, mb);
270 return AVERROR_INVALIDDATA;
273 for (i = 0; i < d; i++) {
274 v = get_bits_long(&ctx->gb, mb);
275 if (v & (1 << (mb - 1)))
276 ctx->deltas[stream_id][i] = v - (1U << mb);
278 ctx->deltas[stream_id][i] = v;
280 for (; i < TM2_DELTAS; i++)
281 ctx->deltas[stream_id][i] = 0;
286 static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size)
295 av_log(ctx->avctx, AV_LOG_ERROR, "not enough space for len left\n");
296 return AVERROR_INVALIDDATA;
299 /* get stream length in dwords */
300 bytestream2_init(&gb, buf, buf_size);
301 len = bytestream2_get_be32(&gb);
306 if (len >= INT_MAX / 4 - 1 || len < 0 || len * 4 + 4 > buf_size) {
307 av_log(ctx->avctx, AV_LOG_ERROR, "Error, invalid stream size.\n");
308 return AVERROR_INVALIDDATA;
312 toks = bytestream2_get_be32(&gb);
314 len = bytestream2_get_be32(&gb);
315 if (len == TM2_ESCAPE) {
316 len = bytestream2_get_be32(&gb);
319 pos = bytestream2_tell(&gb);
321 return AVERROR_INVALIDDATA;
322 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
323 if ((ret = tm2_read_deltas(ctx, stream_id)) < 0)
325 bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
328 /* skip unused fields */
329 len = bytestream2_get_be32(&gb);
330 if (len == TM2_ESCAPE) { /* some unknown length - could be escaped too */
331 bytestream2_skip(&gb, 8); /* unused by decoder */
333 bytestream2_skip(&gb, 4); /* unused by decoder */
336 pos = bytestream2_tell(&gb);
338 return AVERROR_INVALIDDATA;
339 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
340 if ((ret = tm2_build_huff_table(ctx, &codes)) < 0)
342 bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
345 /* check if we have sane number of tokens */
346 if ((toks < 0) || (toks > 0xFFFFFF)) {
347 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
348 ret = AVERROR_INVALIDDATA;
351 ret = av_reallocp_array(&ctx->tokens[stream_id], toks, sizeof(int));
353 ctx->tok_lens[stream_id] = 0;
356 ctx->tok_lens[stream_id] = toks;
357 len = bytestream2_get_be32(&gb);
359 pos = bytestream2_tell(&gb);
361 ret = AVERROR_INVALIDDATA;
364 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
365 for (i = 0; i < toks; i++) {
366 if (get_bits_left(&ctx->gb) <= 0) {
367 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
368 ret = AVERROR_INVALIDDATA;
371 ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes);
372 if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS || ctx->tokens[stream_id][i]<0) {
373 av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
374 ctx->tokens[stream_id][i], stream_id, i);
375 ret = AVERROR_INVALIDDATA;
381 ret = AVERROR_INVALIDDATA;
384 for (i = 0; i < toks; i++) {
385 ctx->tokens[stream_id][i] = codes.recode[0];
386 if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS) {
387 av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
388 ctx->tokens[stream_id][i], stream_id, i);
389 ret = AVERROR_INVALIDDATA;
398 tm2_free_codes(&codes);
402 static inline int GET_TOK(TM2Context *ctx,int type)
404 if (ctx->tok_ptrs[type] >= ctx->tok_lens[type]) {
405 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]);
409 if (type <= TM2_MOT) {
410 if (ctx->tokens[type][ctx->tok_ptrs[type]] >= TM2_DELTAS) {
411 av_log(ctx->avctx, AV_LOG_ERROR, "token %d is too large\n", ctx->tokens[type][ctx->tok_ptrs[type]]);
414 return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]];
416 return ctx->tokens[type][ctx->tok_ptrs[type]++];
419 /* blocks decoding routines */
421 /* common Y, U, V pointers initialisation */
422 #define TM2_INIT_POINTERS() \
425 int Ystride, Ustride, Vstride;\
427 Ystride = ctx->y_stride;\
428 Vstride = ctx->uv_stride;\
429 Ustride = ctx->uv_stride;\
430 Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\
431 V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\
432 U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\
433 last = ctx->last + bx * 4;\
434 clast = ctx->clast + bx * 4;
436 #define TM2_INIT_POINTERS_2() \
438 int oYstride, oUstride, oVstride;\
440 TM2_INIT_POINTERS();\
444 Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\
445 Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\
446 Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2;
448 /* recalculate last and delta values for next blocks */
449 #define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\
450 CD[0] = (unsigned)CHR[ 1] - (unsigned)last[1];\
451 CD[1] = (unsigned)CHR[stride + 1] - (unsigned) CHR[1];\
452 last[0] = (int)CHR[stride + 0];\
453 last[1] = (int)CHR[stride + 1];}
455 /* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */
456 static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last)
461 for (j = 0; j < 4; j++){
463 for (i = 0; i < 4; i++){
464 d = deltas[i + j * 4];
467 Y[i] = av_clip_uint8(last[i]);
474 static inline void tm2_high_chroma(int *data, int stride, int *last, unsigned *CD, int *deltas)
477 for (j = 0; j < 2; j++) {
478 for (i = 0; i < 2; i++) {
479 CD[j] += deltas[i + j * 2];
487 static inline void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx)
497 t = (CD[0] + CD[1]) >> 1;
498 l = (prev - CD[0] - CD[1] + clast[1]) >> 1;
499 CD[1] = CD[0] + CD[1] - t;
503 tm2_high_chroma(data, stride, clast, CD, deltas);
506 static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
513 for (i = 0; i < 4; i++) {
514 deltas[i] = GET_TOK(ctx, TM2_C_HI);
515 deltas[i + 4] = GET_TOK(ctx, TM2_C_HI);
517 tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas);
518 tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4);
521 for (i = 0; i < 16; i++)
522 deltas[i] = GET_TOK(ctx, TM2_L_HI);
524 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
527 static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
534 deltas[0] = GET_TOK(ctx, TM2_C_LO);
535 deltas[1] = deltas[2] = deltas[3] = 0;
536 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
538 deltas[0] = GET_TOK(ctx, TM2_C_LO);
539 deltas[1] = deltas[2] = deltas[3] = 0;
540 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
543 for (i = 0; i < 16; i++)
544 deltas[i] = GET_TOK(ctx, TM2_L_HI);
546 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
549 static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
557 deltas[0] = GET_TOK(ctx, TM2_C_LO);
558 deltas[1] = deltas[2] = deltas[3] = 0;
559 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
561 deltas[0] = GET_TOK(ctx, TM2_C_LO);
562 deltas[1] = deltas[2] = deltas[3] = 0;
563 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
566 for (i = 0; i < 16; i++)
569 deltas[ 0] = GET_TOK(ctx, TM2_L_LO);
570 deltas[ 2] = GET_TOK(ctx, TM2_L_LO);
571 deltas[ 8] = GET_TOK(ctx, TM2_L_LO);
572 deltas[10] = GET_TOK(ctx, TM2_L_LO);
575 last[0] = (last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1;
577 last[0] = (last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1;
578 last[2] = (last[1] + last[3]) >> 1;
580 t1 = ctx->D[0] + ctx->D[1];
582 ctx->D[1] = t1 - (t1 >> 1);
583 t2 = ctx->D[2] + ctx->D[3];
585 ctx->D[3] = t2 - (t2 >> 1);
587 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
590 static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
594 int left, right, diff;
599 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
600 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
602 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
603 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
606 for (i = 0; i < 16; i++)
609 ct = ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3];
612 left = last[-1] - ct;
618 last[0] = left + (diff >> 2);
619 last[1] = left + (diff >> 1);
620 last[2] = right - (diff >> 2);
625 ctx->D[0] = (tp + (ct >> 2)) - left;
627 ctx->D[1] = (tp + (ct >> 1)) - left;
629 ctx->D[2] = ((tp + ct) - (ct >> 2)) - left;
631 ctx->D[3] = (tp + ct) - left;
633 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
636 static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
639 TM2_INIT_POINTERS_2();
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 ctx->D[0] = Yo[3] - last[3];
657 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
658 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
659 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
661 for (j = 0; j < 4; j++) {
662 for (i = 0; i < 4; i++) {
671 static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
675 TM2_INIT_POINTERS_2();
678 for (j = 0; j < 2; j++) {
679 for (i = 0; i < 2; i++) {
680 U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD);
681 V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD);
690 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
691 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
694 ctx->D[0] = Yo[3] - last[3];
695 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
696 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
697 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
699 for (j = 0; j < 4; j++) {
701 for (i = 0; i < 4; i++) {
702 Y[i] = Yo[i] + GET_TOK(ctx, TM2_UPD);
705 ctx->D[j] = last[3] - d;
711 static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
715 TM2_INIT_POINTERS_2();
717 mx = GET_TOK(ctx, TM2_MOT);
718 my = GET_TOK(ctx, TM2_MOT);
719 mx = av_clip(mx, -(bx * 4 + 4), ctx->avctx->width - bx * 4);
720 my = av_clip(my, -(by * 4 + 4), ctx->avctx->height - by * 4);
722 if (4*bx+mx<0 || 4*by+my<0 || 4*bx+mx+4 > ctx->avctx->width || 4*by+my+4 > ctx->avctx->height) {
723 av_log(ctx->avctx, AV_LOG_ERROR, "MV out of picture\n");
727 Yo += my * oYstride + mx;
728 Uo += (my >> 1) * oUstride + (mx >> 1);
729 Vo += (my >> 1) * oVstride + (mx >> 1);
732 for (j = 0; j < 2; j++) {
733 for (i = 0; i < 2; i++) {
744 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
745 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
748 for (j = 0; j < 4; j++) {
749 for (i = 0; i < 4; i++) {
755 /* calculate deltas */
757 ctx->D[0] = Y[3] - last[3];
758 ctx->D[1] = Y[3 + Ystride] - Y[3];
759 ctx->D[2] = Y[3 + Ystride * 2] - Y[3 + Ystride];
760 ctx->D[3] = Y[3 + Ystride * 3] - Y[3 + Ystride * 2];
761 for (i = 0; i < 4; i++)
762 last[i] = Y[i + Ystride * 3];
765 static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
768 int w = ctx->avctx->width, h = ctx->avctx->height, bw = w >> 2, bh = h >> 2, cw = w >> 1;
774 for (i = 0; i < TM2_NUM_STREAMS; i++)
775 ctx->tok_ptrs[i] = 0;
777 if (ctx->tok_lens[TM2_TYPE]<bw*bh) {
778 av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh);
779 return AVERROR_INVALIDDATA;
782 memset(ctx->last, 0, 4 * bw * sizeof(int));
783 memset(ctx->clast, 0, 4 * bw * sizeof(int));
785 for (j = 0; j < bh; j++) {
786 memset(ctx->D, 0, 4 * sizeof(int));
787 memset(ctx->CD, 0, 4 * sizeof(int));
788 for (i = 0; i < bw; i++) {
789 type = GET_TOK(ctx, TM2_TYPE);
792 tm2_hi_res_block(ctx, p, i, j);
795 tm2_med_res_block(ctx, p, i, j);
798 tm2_low_res_block(ctx, p, i, j);
801 tm2_null_res_block(ctx, p, i, j);
804 tm2_update_block(ctx, p, i, j);
808 tm2_still_block(ctx, p, i, j);
812 tm2_motion_block(ctx, p, i, j);
816 av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type);
819 return AVERROR_INVALIDDATA;
823 /* copy data from our buffer to AVFrame */
824 Y = (ctx->cur?ctx->Y2:ctx->Y1);
825 U = (ctx->cur?ctx->U2:ctx->U1);
826 V = (ctx->cur?ctx->V2:ctx->V1);
828 for (j = 0; j < h; j++) {
829 for (i = 0; i < w; i++) {
830 int y = Y[i], u = U[i >> 1], v = V[i >> 1];
831 dst[3*i+0] = av_clip_uint8(y + v);
832 dst[3*i+1] = av_clip_uint8(y);
833 dst[3*i+2] = av_clip_uint8(y + u);
836 /* horizontal edge extension */
837 Y[-4] = Y[-3] = Y[-2] = Y[-1] = Y[0];
838 Y[w + 3] = Y[w + 2] = Y[w + 1] = Y[w] = Y[w - 1];
840 /* vertical edge extension */
842 memcpy(Y - 4 - 1 * ctx->y_stride, Y - 4, ctx->y_stride);
843 memcpy(Y - 4 - 2 * ctx->y_stride, Y - 4, ctx->y_stride);
844 memcpy(Y - 4 - 3 * ctx->y_stride, Y - 4, ctx->y_stride);
845 memcpy(Y - 4 - 4 * ctx->y_stride, Y - 4, ctx->y_stride);
846 } else if (j == h - 1) {
847 memcpy(Y - 4 + 1 * ctx->y_stride, Y - 4, ctx->y_stride);
848 memcpy(Y - 4 + 2 * ctx->y_stride, Y - 4, ctx->y_stride);
849 memcpy(Y - 4 + 3 * ctx->y_stride, Y - 4, ctx->y_stride);
850 memcpy(Y - 4 + 4 * ctx->y_stride, Y - 4, ctx->y_stride);
855 /* horizontal edge extension */
856 U[-2] = U[-1] = U[0];
857 V[-2] = V[-1] = V[0];
858 U[cw + 1] = U[cw] = U[cw - 1];
859 V[cw + 1] = V[cw] = V[cw - 1];
861 /* vertical edge extension */
863 memcpy(U - 2 - 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
864 memcpy(V - 2 - 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
865 memcpy(U - 2 - 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
866 memcpy(V - 2 - 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
867 } else if (j == h - 1) {
868 memcpy(U - 2 + 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
869 memcpy(V - 2 + 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
870 memcpy(U - 2 + 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
871 memcpy(V - 2 + 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
877 dst += p->linesize[0];
883 static const int tm2_stream_order[TM2_NUM_STREAMS] = {
884 TM2_C_HI, TM2_C_LO, TM2_L_HI, TM2_L_LO, TM2_UPD, TM2_MOT, TM2_TYPE
887 #define TM2_HEADER_SIZE 40
889 static int decode_frame(AVCodecContext *avctx,
890 void *data, int *got_frame,
893 TM2Context * const l = avctx->priv_data;
894 const uint8_t *buf = avpkt->data;
895 int buf_size = avpkt->size & ~3;
896 AVFrame * const p = l->pic;
897 int offset = TM2_HEADER_SIZE;
902 av_fast_padded_malloc(&l->buffer, &l->buffer_size, buf_size);
904 av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");
905 return AVERROR(ENOMEM);
908 if ((ret = ff_reget_buffer(avctx, p)) < 0)
911 l->bdsp.bswap_buf((uint32_t *) l->buffer, (const uint32_t *) buf,
914 if ((ret = tm2_read_header(l, l->buffer)) < 0) {
918 for (i = 0; i < TM2_NUM_STREAMS; i++) {
919 if (offset >= buf_size) {
920 av_log(avctx, AV_LOG_ERROR, "no space for tm2_read_stream\n");
921 return AVERROR_INVALIDDATA;
924 t = tm2_read_stream(l, l->buffer + offset, tm2_stream_order[i],
927 int j = tm2_stream_order[i];
929 memset(l->tokens[j], 0, sizeof(**l->tokens) * l->tok_lens[j]);
934 p->key_frame = tm2_decode_blocks(l, p);
936 p->pict_type = AV_PICTURE_TYPE_I;
938 p->pict_type = AV_PICTURE_TYPE_P;
942 ret = av_frame_ref(data, l->pic);
944 return (ret < 0) ? ret : buf_size;
947 static av_cold int decode_init(AVCodecContext *avctx)
949 TM2Context * const l = avctx->priv_data;
950 int i, w = avctx->width, h = avctx->height;
952 if ((avctx->width & 3) || (avctx->height & 3)) {
953 av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n");
954 return AVERROR(EINVAL);
958 avctx->pix_fmt = AV_PIX_FMT_BGR24;
960 l->pic = av_frame_alloc();
962 return AVERROR(ENOMEM);
964 ff_bswapdsp_init(&l->bdsp);
966 l->last = av_malloc_array(w >> 2, 4 * sizeof(*l->last) );
967 l->clast = av_malloc_array(w >> 2, 4 * sizeof(*l->clast));
969 for (i = 0; i < TM2_NUM_STREAMS; i++) {
976 l->Y1_base = av_calloc(w * h, sizeof(*l->Y1_base));
977 l->Y2_base = av_calloc(w * h, sizeof(*l->Y2_base));
981 l->U1_base = av_calloc(w * h, sizeof(*l->U1_base));
982 l->V1_base = av_calloc(w * h, sizeof(*l->V1_base));
983 l->U2_base = av_calloc(w * h, sizeof(*l->U2_base));
984 l->V2_base = av_calloc(w * h, sizeof(*l->V1_base));
987 if (!l->Y1_base || !l->Y2_base || !l->U1_base ||
988 !l->V1_base || !l->U2_base || !l->V2_base ||
989 !l->last || !l->clast) {
990 av_freep(&l->Y1_base);
991 av_freep(&l->Y2_base);
992 av_freep(&l->U1_base);
993 av_freep(&l->U2_base);
994 av_freep(&l->V1_base);
995 av_freep(&l->V2_base);
998 av_frame_free(&l->pic);
999 return AVERROR(ENOMEM);
1001 l->Y1 = l->Y1_base + l->y_stride * 4 + 4;
1002 l->Y2 = l->Y2_base + l->y_stride * 4 + 4;
1003 l->U1 = l->U1_base + l->uv_stride * 2 + 2;
1004 l->U2 = l->U2_base + l->uv_stride * 2 + 2;
1005 l->V1 = l->V1_base + l->uv_stride * 2 + 2;
1006 l->V2 = l->V2_base + l->uv_stride * 2 + 2;
1011 static av_cold int decode_end(AVCodecContext *avctx)
1013 TM2Context * const l = avctx->priv_data;
1018 for (i = 0; i < TM2_NUM_STREAMS; i++)
1019 av_freep(&l->tokens[i]);
1021 av_freep(&l->Y1_base);
1022 av_freep(&l->U1_base);
1023 av_freep(&l->V1_base);
1024 av_freep(&l->Y2_base);
1025 av_freep(&l->U2_base);
1026 av_freep(&l->V2_base);
1028 av_freep(&l->buffer);
1031 av_frame_free(&l->pic);
1036 AVCodec ff_truemotion2_decoder = {
1037 .name = "truemotion2",
1038 .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0"),
1039 .type = AVMEDIA_TYPE_VIDEO,
1040 .id = AV_CODEC_ID_TRUEMOTION2,
1041 .priv_data_size = sizeof(TM2Context),
1042 .init = decode_init,
1043 .close = decode_end,
1044 .decode = decode_frame,
1045 .capabilities = AV_CODEC_CAP_DR1,