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.
30 #include "bytestream.h"
35 #define TM2_ESCAPE 0x80000000
38 /* Huffman-coded streams of different types of blocks */
61 typedef struct TM2Context {
62 AVCodecContext *avctx;
72 int *tokens[TM2_NUM_STREAMS];
73 int tok_lens[TM2_NUM_STREAMS];
74 int tok_ptrs[TM2_NUM_STREAMS];
75 int deltas[TM2_NUM_STREAMS][TM2_DELTAS];
76 /* for blocks decoding */
82 /* data for current and previous frame */
83 int *Y1_base, *U1_base, *V1_base, *Y2_base, *U2_base, *V2_base;
84 int *Y1, *U1, *V1, *Y2, *U2, *V2;
85 int y_stride, uv_stride;
90 * Huffman codes for each of streams
92 typedef struct TM2Codes {
93 VLC vlc; ///< table for FFmpeg bitstream reader
95 int *recode; ///< table for converting from code indexes to values
100 * structure for gathering Huffman codes information
102 typedef struct TM2Huff {
103 int val_bits; ///< length of literal
104 int max_bits; ///< maximum length of code
105 int min_bits; ///< minimum length of code
106 int nodes; ///< total number of nodes in tree
107 int num; ///< current number filled
108 int max_num; ///< total number of codes
109 int *nums; ///< literals
110 uint32_t *bits; ///< codes
111 int *lens; ///< codelengths
114 static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff)
117 if (length > huff->max_bits) {
118 av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n",
120 return AVERROR_INVALIDDATA;
123 if (!get_bits1(&ctx->gb)) { /* literal */
127 if (huff->num >= huff->max_num) {
128 av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n");
129 return AVERROR_INVALIDDATA;
131 huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits);
132 huff->bits[huff->num] = prefix;
133 huff->lens[huff->num] = length;
136 } else { /* non-terminal node */
137 if ((ret = tm2_read_tree(ctx, prefix << 1, length + 1, huff)) < 0)
139 if ((ret = tm2_read_tree(ctx, (prefix << 1) | 1, length + 1, huff)) < 0)
145 static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code)
150 huff.val_bits = get_bits(&ctx->gb, 5);
151 huff.max_bits = get_bits(&ctx->gb, 5);
152 huff.min_bits = get_bits(&ctx->gb, 5);
153 huff.nodes = get_bits_long(&ctx->gb, 17);
156 /* check for correct codes parameters */
157 if ((huff.val_bits < 1) || (huff.val_bits > 32) ||
158 (huff.max_bits < 0) || (huff.max_bits > 25)) {
159 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal "
160 "length: %i, max code length: %i\n", huff.val_bits, huff.max_bits);
161 return AVERROR_INVALIDDATA;
163 if ((huff.nodes <= 0) || (huff.nodes > 0x10000)) {
164 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree "
165 "nodes: %i\n", huff.nodes);
166 return AVERROR_INVALIDDATA;
169 if (huff.max_bits == 0)
172 /* allocate space for codes - it is exactly ceil(nodes / 2) entries */
173 huff.max_num = (huff.nodes + 1) >> 1;
174 huff.nums = av_calloc(huff.max_num, sizeof(int));
175 huff.bits = av_calloc(huff.max_num, sizeof(uint32_t));
176 huff.lens = av_calloc(huff.max_num, sizeof(int));
178 if (!huff.nums || !huff.bits || !huff.lens) {
179 res = AVERROR(ENOMEM);
183 res = tm2_read_tree(ctx, 0, 0, &huff);
185 if (huff.num != huff.max_num) {
186 av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n",
187 huff.num, huff.max_num);
188 res = AVERROR_INVALIDDATA;
191 /* convert codes to vlc_table */
195 res = init_vlc(&code->vlc, huff.max_bits, huff.max_num,
196 huff.lens, sizeof(int), sizeof(int),
197 huff.bits, sizeof(uint32_t), sizeof(uint32_t), 0);
199 av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
201 code->bits = huff.max_bits;
202 code->length = huff.max_num;
203 code->recode = av_malloc_array(code->length, sizeof(int));
205 res = AVERROR(ENOMEM);
208 for (i = 0; i < code->length; i++)
209 code->recode[i] = huff.nums[i];
213 /* free allocated memory */
221 static void tm2_free_codes(TM2Codes *code)
223 av_free(code->recode);
225 ff_free_vlc(&code->vlc);
228 static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code)
231 val = get_vlc2(gb, code->vlc.table, code->bits, 1);
234 return code->recode[val];
237 #define TM2_OLD_HEADER_MAGIC 0x00000100
238 #define TM2_NEW_HEADER_MAGIC 0x00000101
240 static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
242 uint32_t magic = AV_RL32(buf);
245 case TM2_OLD_HEADER_MAGIC:
246 avpriv_request_sample(ctx->avctx, "Old TM2 header");
248 case TM2_NEW_HEADER_MAGIC:
251 av_log(ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08"PRIX32"\n",
253 return AVERROR_INVALIDDATA;
257 static int tm2_read_deltas(TM2Context *ctx, int stream_id)
262 d = get_bits(&ctx->gb, 9);
263 mb = get_bits(&ctx->gb, 5);
265 if ((d < 1) || (d > TM2_DELTAS) || (mb < 1) || (mb > 32)) {
266 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect delta table: %i deltas x %i bits\n", d, mb);
267 return AVERROR_INVALIDDATA;
270 for (i = 0; i < d; i++) {
271 v = get_bits_long(&ctx->gb, mb);
272 if (v & (1 << (mb - 1)))
273 ctx->deltas[stream_id][i] = v - (1 << mb);
275 ctx->deltas[stream_id][i] = v;
277 for (; i < TM2_DELTAS; i++)
278 ctx->deltas[stream_id][i] = 0;
283 static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size)
292 av_log(ctx->avctx, AV_LOG_ERROR, "not enough space for len left\n");
293 return AVERROR_INVALIDDATA;
296 /* get stream length in dwords */
297 bytestream2_init(&gb, buf, buf_size);
298 len = bytestream2_get_be32(&gb);
304 if (len >= INT_MAX/4-1 || len < 0 || skip > buf_size) {
305 av_log(ctx->avctx, AV_LOG_ERROR, "invalid stream size\n");
306 return AVERROR_INVALIDDATA;
309 toks = bytestream2_get_be32(&gb);
311 len = bytestream2_get_be32(&gb);
312 if (len == TM2_ESCAPE) {
313 len = bytestream2_get_be32(&gb);
316 pos = bytestream2_tell(&gb);
318 return AVERROR_INVALIDDATA;
319 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
320 if ((ret = tm2_read_deltas(ctx, stream_id)) < 0)
322 bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
325 /* skip unused fields */
326 len = bytestream2_get_be32(&gb);
327 if (len == TM2_ESCAPE) { /* some unknown length - could be escaped too */
328 bytestream2_skip(&gb, 8); /* unused by decoder */
330 bytestream2_skip(&gb, 4); /* unused by decoder */
333 pos = bytestream2_tell(&gb);
335 return AVERROR_INVALIDDATA;
336 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
337 if ((ret = tm2_build_huff_table(ctx, &codes)) < 0)
339 bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
342 /* check if we have sane number of tokens */
343 if ((toks < 0) || (toks > 0xFFFFFF)) {
344 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
345 tm2_free_codes(&codes);
346 return AVERROR_INVALIDDATA;
348 ret = av_reallocp_array(&ctx->tokens[stream_id], toks, sizeof(int));
350 ctx->tok_lens[stream_id] = 0;
353 ctx->tok_lens[stream_id] = toks;
354 len = bytestream2_get_be32(&gb);
356 pos = bytestream2_tell(&gb);
358 return AVERROR_INVALIDDATA;
359 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
360 for (i = 0; i < toks; i++) {
361 if (get_bits_left(&ctx->gb) <= 0) {
362 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
363 return AVERROR_INVALIDDATA;
365 ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes);
366 if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS || ctx->tokens[stream_id][i]<0) {
367 av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
368 ctx->tokens[stream_id][i], stream_id, i);
369 return AVERROR_INVALIDDATA;
373 for (i = 0; i < toks; i++) {
374 ctx->tokens[stream_id][i] = codes.recode[0];
375 if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS) {
376 av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
377 ctx->tokens[stream_id][i], stream_id, i);
378 return AVERROR_INVALIDDATA;
382 tm2_free_codes(&codes);
387 static inline int GET_TOK(TM2Context *ctx,int type)
389 if (ctx->tok_ptrs[type] >= ctx->tok_lens[type]) {
390 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]);
393 if (type <= TM2_MOT) {
394 if (ctx->tokens[type][ctx->tok_ptrs[type]] >= TM2_DELTAS) {
395 av_log(ctx->avctx, AV_LOG_ERROR, "token %d is too large\n", ctx->tokens[type][ctx->tok_ptrs[type]]);
398 return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]];
400 return ctx->tokens[type][ctx->tok_ptrs[type]++];
403 /* blocks decoding routines */
405 /* common Y, U, V pointers initialisation */
406 #define TM2_INIT_POINTERS() \
409 int Ystride, Ustride, Vstride;\
411 Ystride = ctx->y_stride;\
412 Vstride = ctx->uv_stride;\
413 Ustride = ctx->uv_stride;\
414 Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\
415 V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\
416 U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\
417 last = ctx->last + bx * 4;\
418 clast = ctx->clast + bx * 4;
420 #define TM2_INIT_POINTERS_2() \
422 int oYstride, oUstride, oVstride;\
424 TM2_INIT_POINTERS();\
428 Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\
429 Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\
430 Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2;
432 /* recalculate last and delta values for next blocks */
433 #define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\
434 CD[0] = CHR[1] - last[1];\
435 CD[1] = (int)CHR[stride + 1] - (int)CHR[1];\
436 last[0] = (int)CHR[stride + 0];\
437 last[1] = (int)CHR[stride + 1];}
439 /* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */
440 static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last)
445 for (j = 0; j < 4; j++){
447 for (i = 0; i < 4; i++){
448 d = deltas[i + j * 4];
451 Y[i] = av_clip_uint8(last[i]);
458 static inline void tm2_high_chroma(int *data, int stride, int *last, int *CD, int *deltas)
461 for (j = 0; j < 2; j++) {
462 for (i = 0; i < 2; i++) {
463 CD[j] += deltas[i + j * 2];
471 static inline void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx)
481 t = (CD[0] + CD[1]) >> 1;
482 l = (prev - CD[0] - CD[1] + clast[1]) >> 1;
483 CD[1] = CD[0] + CD[1] - t;
487 tm2_high_chroma(data, stride, clast, CD, deltas);
490 static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
497 for (i = 0; i < 4; i++) {
498 deltas[i] = GET_TOK(ctx, TM2_C_HI);
499 deltas[i + 4] = GET_TOK(ctx, TM2_C_HI);
501 tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas);
502 tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4);
505 for (i = 0; i < 16; i++)
506 deltas[i] = GET_TOK(ctx, TM2_L_HI);
508 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
511 static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
518 deltas[0] = GET_TOK(ctx, TM2_C_LO);
519 deltas[1] = deltas[2] = deltas[3] = 0;
520 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
522 deltas[0] = GET_TOK(ctx, TM2_C_LO);
523 deltas[1] = deltas[2] = deltas[3] = 0;
524 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
527 for (i = 0; i < 16; i++)
528 deltas[i] = GET_TOK(ctx, TM2_L_HI);
530 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
533 static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
541 deltas[0] = GET_TOK(ctx, TM2_C_LO);
542 deltas[1] = deltas[2] = deltas[3] = 0;
543 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
545 deltas[0] = GET_TOK(ctx, TM2_C_LO);
546 deltas[1] = deltas[2] = deltas[3] = 0;
547 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
550 for (i = 0; i < 16; i++)
553 deltas[ 0] = GET_TOK(ctx, TM2_L_LO);
554 deltas[ 2] = GET_TOK(ctx, TM2_L_LO);
555 deltas[ 8] = GET_TOK(ctx, TM2_L_LO);
556 deltas[10] = GET_TOK(ctx, TM2_L_LO);
559 last[0] = (last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1;
561 last[0] = (last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1;
562 last[2] = (last[1] + last[3]) >> 1;
564 t1 = ctx->D[0] + ctx->D[1];
566 ctx->D[1] = t1 - (t1 >> 1);
567 t2 = ctx->D[2] + ctx->D[3];
569 ctx->D[3] = t2 - (t2 >> 1);
571 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
574 static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
578 int left, right, diff;
583 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
584 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
586 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
587 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
590 for (i = 0; i < 16; i++)
593 ct = ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3];
596 left = last[-1] - ct;
602 last[0] = left + (diff >> 2);
603 last[1] = left + (diff >> 1);
604 last[2] = right - (diff >> 2);
609 ctx->D[0] = (tp + (ct >> 2)) - left;
611 ctx->D[1] = (tp + (ct >> 1)) - left;
613 ctx->D[2] = ((tp + ct) - (ct >> 2)) - left;
615 ctx->D[3] = (tp + ct) - left;
617 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
620 static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
623 TM2_INIT_POINTERS_2();
626 for (j = 0; j < 2; j++) {
627 for (i = 0; i < 2; i++){
631 U += Ustride; V += Vstride;
632 Uo += oUstride; Vo += oVstride;
636 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
637 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
640 ctx->D[0] = Yo[3] - last[3];
641 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
642 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
643 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
645 for (j = 0; j < 4; j++) {
646 for (i = 0; i < 4; i++) {
655 static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
659 TM2_INIT_POINTERS_2();
662 for (j = 0; j < 2; j++) {
663 for (i = 0; i < 2; i++) {
664 U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD);
665 V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD);
674 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
675 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
678 ctx->D[0] = Yo[3] - last[3];
679 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
680 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
681 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
683 for (j = 0; j < 4; j++) {
685 for (i = 0; i < 4; i++) {
686 Y[i] = Yo[i] + GET_TOK(ctx, TM2_UPD);
689 ctx->D[j] = last[3] - d;
695 static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
699 TM2_INIT_POINTERS_2();
701 mx = GET_TOK(ctx, TM2_MOT);
702 my = GET_TOK(ctx, TM2_MOT);
703 mx = av_clip(mx, -(bx * 4 + 4), ctx->avctx->width - bx * 4);
704 my = av_clip(my, -(by * 4 + 4), ctx->avctx->height - by * 4);
706 if (4*bx+mx<0 || 4*by+my<0 || 4*bx+mx+4 > ctx->avctx->width || 4*by+my+4 > ctx->avctx->height) {
707 av_log(ctx->avctx, AV_LOG_ERROR, "MV out of picture\n");
711 Yo += my * oYstride + mx;
712 Uo += (my >> 1) * oUstride + (mx >> 1);
713 Vo += (my >> 1) * oVstride + (mx >> 1);
716 for (j = 0; j < 2; j++) {
717 for (i = 0; i < 2; i++) {
728 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
729 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
732 for (j = 0; j < 4; j++) {
733 for (i = 0; i < 4; i++) {
739 /* calculate deltas */
741 ctx->D[0] = Y[3] - last[3];
742 ctx->D[1] = Y[3 + Ystride] - Y[3];
743 ctx->D[2] = Y[3 + Ystride * 2] - Y[3 + Ystride];
744 ctx->D[3] = Y[3 + Ystride * 3] - Y[3 + Ystride * 2];
745 for (i = 0; i < 4; i++)
746 last[i] = Y[i + Ystride * 3];
749 static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
752 int w = ctx->avctx->width, h = ctx->avctx->height, bw = w >> 2, bh = h >> 2, cw = w >> 1;
758 for (i = 0; i < TM2_NUM_STREAMS; i++)
759 ctx->tok_ptrs[i] = 0;
761 if (ctx->tok_lens[TM2_TYPE]<bw*bh) {
762 av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh);
763 return AVERROR_INVALIDDATA;
766 memset(ctx->last, 0, 4 * bw * sizeof(int));
767 memset(ctx->clast, 0, 4 * bw * sizeof(int));
769 for (j = 0; j < bh; j++) {
770 memset(ctx->D, 0, 4 * sizeof(int));
771 memset(ctx->CD, 0, 4 * sizeof(int));
772 for (i = 0; i < bw; i++) {
773 type = GET_TOK(ctx, TM2_TYPE);
776 tm2_hi_res_block(ctx, p, i, j);
779 tm2_med_res_block(ctx, p, i, j);
782 tm2_low_res_block(ctx, p, i, j);
785 tm2_null_res_block(ctx, p, i, j);
788 tm2_update_block(ctx, p, i, j);
792 tm2_still_block(ctx, p, i, j);
796 tm2_motion_block(ctx, p, i, j);
800 av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type);
805 /* copy data from our buffer to AVFrame */
806 Y = (ctx->cur?ctx->Y2:ctx->Y1);
807 U = (ctx->cur?ctx->U2:ctx->U1);
808 V = (ctx->cur?ctx->V2:ctx->V1);
810 for (j = 0; j < h; j++) {
811 for (i = 0; i < w; i++) {
812 int y = Y[i], u = U[i >> 1], v = V[i >> 1];
813 dst[3*i+0] = av_clip_uint8(y + v);
814 dst[3*i+1] = av_clip_uint8(y);
815 dst[3*i+2] = av_clip_uint8(y + u);
818 /* horizontal edge extension */
819 Y[-4] = Y[-3] = Y[-2] = Y[-1] = Y[0];
820 Y[w + 3] = Y[w + 2] = Y[w + 1] = Y[w] = Y[w - 1];
822 /* vertical edge extension */
824 memcpy(Y - 4 - 1 * ctx->y_stride, Y - 4, ctx->y_stride);
825 memcpy(Y - 4 - 2 * ctx->y_stride, Y - 4, ctx->y_stride);
826 memcpy(Y - 4 - 3 * ctx->y_stride, Y - 4, ctx->y_stride);
827 memcpy(Y - 4 - 4 * ctx->y_stride, Y - 4, ctx->y_stride);
828 } else if (j == h - 1) {
829 memcpy(Y - 4 + 1 * ctx->y_stride, Y - 4, ctx->y_stride);
830 memcpy(Y - 4 + 2 * ctx->y_stride, Y - 4, ctx->y_stride);
831 memcpy(Y - 4 + 3 * ctx->y_stride, Y - 4, ctx->y_stride);
832 memcpy(Y - 4 + 4 * ctx->y_stride, Y - 4, ctx->y_stride);
837 /* horizontal edge extension */
838 U[-2] = U[-1] = U[0];
839 V[-2] = V[-1] = V[0];
840 U[cw + 1] = U[cw] = U[cw - 1];
841 V[cw + 1] = V[cw] = V[cw - 1];
843 /* vertical edge extension */
845 memcpy(U - 2 - 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
846 memcpy(V - 2 - 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
847 memcpy(U - 2 - 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
848 memcpy(V - 2 - 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
849 } else if (j == h - 1) {
850 memcpy(U - 2 + 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
851 memcpy(V - 2 + 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
852 memcpy(U - 2 + 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
853 memcpy(V - 2 + 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
859 dst += p->linesize[0];
865 static const int tm2_stream_order[TM2_NUM_STREAMS] = {
866 TM2_C_HI, TM2_C_LO, TM2_L_HI, TM2_L_LO, TM2_UPD, TM2_MOT, TM2_TYPE
869 #define TM2_HEADER_SIZE 40
871 static int decode_frame(AVCodecContext *avctx,
872 void *data, int *got_frame,
875 TM2Context * const l = avctx->priv_data;
876 const uint8_t *buf = avpkt->data;
877 int buf_size = avpkt->size & ~3;
878 AVFrame * const p = l->pic;
879 int offset = TM2_HEADER_SIZE;
882 av_fast_padded_malloc(&l->buffer, &l->buffer_size, buf_size);
884 av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");
885 return AVERROR(ENOMEM);
888 if ((ret = ff_reget_buffer(avctx, p)) < 0)
891 l->dsp.bswap_buf((uint32_t*)l->buffer, (const uint32_t*)buf, buf_size >> 2);
893 if ((ret = tm2_read_header(l, l->buffer)) < 0) {
897 for (i = 0; i < TM2_NUM_STREAMS; i++) {
898 if (offset >= buf_size) {
899 av_log(avctx, AV_LOG_ERROR, "no space for tm2_read_stream\n");
900 return AVERROR_INVALIDDATA;
903 t = tm2_read_stream(l, l->buffer + offset, tm2_stream_order[i],
906 int j = tm2_stream_order[i];
907 memset(l->tokens[j], 0, sizeof(**l->tokens) * l->tok_lens[j]);
912 p->key_frame = tm2_decode_blocks(l, p);
914 p->pict_type = AV_PICTURE_TYPE_I;
916 p->pict_type = AV_PICTURE_TYPE_P;
920 ret = av_frame_ref(data, l->pic);
922 return (ret < 0) ? ret : buf_size;
925 static av_cold int decode_init(AVCodecContext *avctx)
927 TM2Context * const l = avctx->priv_data;
928 int i, w = avctx->width, h = avctx->height;
930 if ((avctx->width & 3) || (avctx->height & 3)) {
931 av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n");
932 return AVERROR(EINVAL);
936 avctx->pix_fmt = AV_PIX_FMT_BGR24;
938 l->pic = av_frame_alloc();
940 return AVERROR(ENOMEM);
942 ff_dsputil_init(&l->dsp, avctx);
944 l->last = av_malloc_array(w >> 2, 4 * sizeof(*l->last) );
945 l->clast = av_malloc_array(w >> 2, 4 * sizeof(*l->clast));
947 for (i = 0; i < TM2_NUM_STREAMS; i++) {
954 l->Y1_base = av_calloc(w * h, sizeof(*l->Y1_base));
955 l->Y2_base = av_calloc(w * h, sizeof(*l->Y2_base));
959 l->U1_base = av_calloc(w * h, sizeof(*l->U1_base));
960 l->V1_base = av_calloc(w * h, sizeof(*l->V1_base));
961 l->U2_base = av_calloc(w * h, sizeof(*l->U2_base));
962 l->V2_base = av_calloc(w * h, sizeof(*l->V1_base));
965 if (!l->Y1_base || !l->Y2_base || !l->U1_base ||
966 !l->V1_base || !l->U2_base || !l->V2_base ||
967 !l->last || !l->clast) {
968 av_freep(&l->Y1_base);
969 av_freep(&l->Y2_base);
970 av_freep(&l->U1_base);
971 av_freep(&l->U2_base);
972 av_freep(&l->V1_base);
973 av_freep(&l->V2_base);
976 av_frame_free(&l->pic);
977 return AVERROR(ENOMEM);
979 l->Y1 = l->Y1_base + l->y_stride * 4 + 4;
980 l->Y2 = l->Y2_base + l->y_stride * 4 + 4;
981 l->U1 = l->U1_base + l->uv_stride * 2 + 2;
982 l->U2 = l->U2_base + l->uv_stride * 2 + 2;
983 l->V1 = l->V1_base + l->uv_stride * 2 + 2;
984 l->V2 = l->V2_base + l->uv_stride * 2 + 2;
989 static av_cold int decode_end(AVCodecContext *avctx)
991 TM2Context * const l = avctx->priv_data;
996 for (i = 0; i < TM2_NUM_STREAMS; i++)
997 av_free(l->tokens[i]);
1000 av_free(l->U1_base);
1001 av_free(l->V1_base);
1002 av_free(l->Y2_base);
1003 av_free(l->U2_base);
1004 av_free(l->V2_base);
1006 av_freep(&l->buffer);
1009 av_frame_free(&l->pic);
1014 AVCodec ff_truemotion2_decoder = {
1015 .name = "truemotion2",
1016 .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0"),
1017 .type = AVMEDIA_TYPE_VIDEO,
1018 .id = AV_CODEC_ID_TRUEMOTION2,
1019 .priv_data_size = sizeof(TM2Context),
1020 .init = decode_init,
1021 .close = decode_end,
1022 .decode = decode_frame,
1023 .capabilities = CODEC_CAP_DR1,