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.
28 #include "bytestream.h"
32 #define TM2_ESCAPE 0x80000000
35 /* Huffman-coded streams of different types of blocks */
58 typedef struct TM2Context {
59 AVCodecContext *avctx;
69 int *tokens[TM2_NUM_STREAMS];
70 int tok_lens[TM2_NUM_STREAMS];
71 int tok_ptrs[TM2_NUM_STREAMS];
72 int deltas[TM2_NUM_STREAMS][TM2_DELTAS];
73 /* for blocks decoding */
79 /* data for current and previous frame */
80 int *Y1_base, *U1_base, *V1_base, *Y2_base, *U2_base, *V2_base;
81 int *Y1, *U1, *V1, *Y2, *U2, *V2;
82 int y_stride, uv_stride;
87 * Huffman codes for each of streams
89 typedef struct TM2Codes {
90 VLC vlc; ///< table for FFmpeg bitstream reader
92 int *recode; ///< table for converting from code indexes to values
97 * structure for gathering Huffman codes information
99 typedef struct TM2Huff {
100 int val_bits; ///< length of literal
101 int max_bits; ///< maximum length of code
102 int min_bits; ///< minimum length of code
103 int nodes; ///< total number of nodes in tree
104 int num; ///< current number filled
105 int max_num; ///< total number of codes
106 int *nums; ///< literals
107 uint32_t *bits; ///< codes
108 int *lens; ///< codelengths
111 static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff)
114 if (length > huff->max_bits) {
115 av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n",
117 return AVERROR_INVALIDDATA;
120 if (!get_bits1(&ctx->gb)) { /* literal */
124 if (huff->num >= huff->max_num) {
125 av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n");
126 return AVERROR_INVALIDDATA;
128 huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits);
129 huff->bits[huff->num] = prefix;
130 huff->lens[huff->num] = length;
133 } else { /* non-terminal node */
134 if ((ret = tm2_read_tree(ctx, prefix << 1, length + 1, huff)) < 0)
136 if ((ret = tm2_read_tree(ctx, (prefix << 1) | 1, length + 1, huff)) < 0)
142 static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code)
147 huff.val_bits = get_bits(&ctx->gb, 5);
148 huff.max_bits = get_bits(&ctx->gb, 5);
149 huff.min_bits = get_bits(&ctx->gb, 5);
150 huff.nodes = get_bits_long(&ctx->gb, 17);
153 /* check for correct codes parameters */
154 if ((huff.val_bits < 1) || (huff.val_bits > 32) ||
155 (huff.max_bits < 0) || (huff.max_bits > 25)) {
156 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal "
157 "length: %i, max code length: %i\n", huff.val_bits, huff.max_bits);
158 return AVERROR_INVALIDDATA;
160 if ((huff.nodes <= 0) || (huff.nodes > 0x10000)) {
161 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree "
162 "nodes: %i\n", huff.nodes);
163 return AVERROR_INVALIDDATA;
166 if (huff.max_bits == 0)
169 /* allocate space for codes - it is exactly ceil(nodes / 2) entries */
170 huff.max_num = (huff.nodes + 1) >> 1;
171 huff.nums = av_mallocz(huff.max_num * sizeof(int));
172 huff.bits = av_mallocz(huff.max_num * sizeof(uint32_t));
173 huff.lens = av_mallocz(huff.max_num * sizeof(int));
175 res = tm2_read_tree(ctx, 0, 0, &huff);
177 if (huff.num != huff.max_num) {
178 av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n",
179 huff.num, huff.max_num);
180 res = AVERROR_INVALIDDATA;
183 /* convert codes to vlc_table */
187 res = init_vlc(&code->vlc, huff.max_bits, huff.max_num,
188 huff.lens, sizeof(int), sizeof(int),
189 huff.bits, sizeof(uint32_t), sizeof(uint32_t), 0);
191 av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
193 code->bits = huff.max_bits;
194 code->length = huff.max_num;
195 code->recode = av_malloc(code->length * sizeof(int));
196 for (i = 0; i < code->length; i++)
197 code->recode[i] = huff.nums[i];
200 /* free allocated memory */
208 static void tm2_free_codes(TM2Codes *code)
210 av_free(code->recode);
212 ff_free_vlc(&code->vlc);
215 static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code)
218 val = get_vlc2(gb, code->vlc.table, code->bits, 1);
221 return code->recode[val];
224 #define TM2_OLD_HEADER_MAGIC 0x00000100
225 #define TM2_NEW_HEADER_MAGIC 0x00000101
227 static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
229 uint32_t magic = AV_RL32(buf);
232 case TM2_OLD_HEADER_MAGIC:
233 av_log_missing_feature(ctx->avctx, "TM2 old header", 1);
235 case TM2_NEW_HEADER_MAGIC:
238 av_log(ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08X\n", magic);
239 return AVERROR_INVALIDDATA;
243 static int tm2_read_deltas(TM2Context *ctx, int stream_id)
248 d = get_bits(&ctx->gb, 9);
249 mb = get_bits(&ctx->gb, 5);
251 if ((d < 1) || (d > TM2_DELTAS) || (mb < 1) || (mb > 32)) {
252 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect delta table: %i deltas x %i bits\n", d, mb);
253 return AVERROR_INVALIDDATA;
256 for (i = 0; i < d; i++) {
257 v = get_bits_long(&ctx->gb, mb);
258 if (v & (1 << (mb - 1)))
259 ctx->deltas[stream_id][i] = v - (1 << mb);
261 ctx->deltas[stream_id][i] = v;
263 for (; i < TM2_DELTAS; i++)
264 ctx->deltas[stream_id][i] = 0;
269 static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size)
278 av_log(ctx->avctx, AV_LOG_ERROR, "not enough space for len left\n");
279 return AVERROR_INVALIDDATA;
282 /* get stream length in dwords */
283 bytestream2_init(&gb, buf, buf_size);
284 len = bytestream2_get_be32(&gb);
290 if (len >= INT_MAX/4-1 || len < 0 || skip > buf_size) {
291 av_log(ctx->avctx, AV_LOG_ERROR, "invalid stream size\n");
292 return AVERROR_INVALIDDATA;
295 toks = bytestream2_get_be32(&gb);
297 len = bytestream2_get_be32(&gb);
298 if (len == TM2_ESCAPE) {
299 len = bytestream2_get_be32(&gb);
302 pos = bytestream2_tell(&gb);
304 return AVERROR_INVALIDDATA;
305 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
306 if ((ret = tm2_read_deltas(ctx, stream_id)) < 0)
308 bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
311 /* skip unused fields */
312 len = bytestream2_get_be32(&gb);
313 if (len == TM2_ESCAPE) { /* some unknown length - could be escaped too */
314 bytestream2_skip(&gb, 8); /* unused by decoder */
316 bytestream2_skip(&gb, 4); /* unused by decoder */
319 pos = bytestream2_tell(&gb);
321 return AVERROR_INVALIDDATA;
322 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
323 if ((ret = tm2_build_huff_table(ctx, &codes)) < 0)
325 bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
328 /* check if we have sane number of tokens */
329 if ((toks < 0) || (toks > 0xFFFFFF)) {
330 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
331 tm2_free_codes(&codes);
332 return AVERROR_INVALIDDATA;
334 ctx->tokens[stream_id] = av_realloc(ctx->tokens[stream_id], toks * sizeof(int));
335 ctx->tok_lens[stream_id] = toks;
336 len = bytestream2_get_be32(&gb);
338 pos = bytestream2_tell(&gb);
340 return AVERROR_INVALIDDATA;
341 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
342 for (i = 0; i < toks; i++) {
343 if (get_bits_left(&ctx->gb) <= 0) {
344 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
345 return AVERROR_INVALIDDATA;
347 ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes);
348 if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS || ctx->tokens[stream_id][i]<0) {
349 av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
350 ctx->tokens[stream_id][i], stream_id, i);
351 return AVERROR_INVALIDDATA;
355 for (i = 0; i < toks; i++) {
356 ctx->tokens[stream_id][i] = codes.recode[0];
357 if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS) {
358 av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
359 ctx->tokens[stream_id][i], stream_id, i);
360 return AVERROR_INVALIDDATA;
364 tm2_free_codes(&codes);
369 static inline int GET_TOK(TM2Context *ctx,int type)
371 if (ctx->tok_ptrs[type] >= ctx->tok_lens[type]) {
372 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]);
375 if (type <= TM2_MOT) {
376 if (ctx->tokens[type][ctx->tok_ptrs[type]] >= TM2_DELTAS) {
377 av_log(ctx->avctx, AV_LOG_ERROR, "token %d is too large\n", ctx->tokens[type][ctx->tok_ptrs[type]]);
380 return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]];
382 return ctx->tokens[type][ctx->tok_ptrs[type]++];
385 /* blocks decoding routines */
387 /* common Y, U, V pointers initialisation */
388 #define TM2_INIT_POINTERS() \
391 int Ystride, Ustride, Vstride;\
393 Ystride = ctx->y_stride;\
394 Vstride = ctx->uv_stride;\
395 Ustride = ctx->uv_stride;\
396 Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\
397 V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\
398 U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\
399 last = ctx->last + bx * 4;\
400 clast = ctx->clast + bx * 4;
402 #define TM2_INIT_POINTERS_2() \
404 int oYstride, oUstride, oVstride;\
406 TM2_INIT_POINTERS();\
410 Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\
411 Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\
412 Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2;
414 /* recalculate last and delta values for next blocks */
415 #define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\
416 CD[0] = CHR[1] - last[1];\
417 CD[1] = (int)CHR[stride + 1] - (int)CHR[1];\
418 last[0] = (int)CHR[stride + 0];\
419 last[1] = (int)CHR[stride + 1];}
421 /* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */
422 static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last)
427 for (j = 0; j < 4; j++){
429 for (i = 0; i < 4; i++){
430 d = deltas[i + j * 4];
433 Y[i] = av_clip_uint8(last[i]);
440 static inline void tm2_high_chroma(int *data, int stride, int *last, int *CD, int *deltas)
443 for (j = 0; j < 2; j++) {
444 for (i = 0; i < 2; i++) {
445 CD[j] += deltas[i + j * 2];
453 static inline void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx)
463 t = (CD[0] + CD[1]) >> 1;
464 l = (prev - CD[0] - CD[1] + clast[1]) >> 1;
465 CD[1] = CD[0] + CD[1] - t;
469 tm2_high_chroma(data, stride, clast, CD, deltas);
472 static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
479 for (i = 0; i < 4; i++) {
480 deltas[i] = GET_TOK(ctx, TM2_C_HI);
481 deltas[i + 4] = GET_TOK(ctx, TM2_C_HI);
483 tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas);
484 tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4);
487 for (i = 0; i < 16; i++)
488 deltas[i] = GET_TOK(ctx, TM2_L_HI);
490 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
493 static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
500 deltas[0] = GET_TOK(ctx, TM2_C_LO);
501 deltas[1] = deltas[2] = deltas[3] = 0;
502 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
504 deltas[0] = GET_TOK(ctx, TM2_C_LO);
505 deltas[1] = deltas[2] = deltas[3] = 0;
506 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
509 for (i = 0; i < 16; i++)
510 deltas[i] = GET_TOK(ctx, TM2_L_HI);
512 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
515 static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
523 deltas[0] = GET_TOK(ctx, TM2_C_LO);
524 deltas[1] = deltas[2] = deltas[3] = 0;
525 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
527 deltas[0] = GET_TOK(ctx, TM2_C_LO);
528 deltas[1] = deltas[2] = deltas[3] = 0;
529 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
532 for (i = 0; i < 16; i++)
535 deltas[ 0] = GET_TOK(ctx, TM2_L_LO);
536 deltas[ 2] = GET_TOK(ctx, TM2_L_LO);
537 deltas[ 8] = GET_TOK(ctx, TM2_L_LO);
538 deltas[10] = GET_TOK(ctx, TM2_L_LO);
541 last[0] = (last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1;
543 last[0] = (last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1;
544 last[2] = (last[1] + last[3]) >> 1;
546 t1 = ctx->D[0] + ctx->D[1];
548 ctx->D[1] = t1 - (t1 >> 1);
549 t2 = ctx->D[2] + ctx->D[3];
551 ctx->D[3] = t2 - (t2 >> 1);
553 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
556 static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
560 int left, right, diff;
565 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
566 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
568 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
569 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
572 for (i = 0; i < 16; i++)
575 ct = ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3];
578 left = last[-1] - ct;
584 last[0] = left + (diff >> 2);
585 last[1] = left + (diff >> 1);
586 last[2] = right - (diff >> 2);
591 ctx->D[0] = (tp + (ct >> 2)) - left;
593 ctx->D[1] = (tp + (ct >> 1)) - left;
595 ctx->D[2] = ((tp + ct) - (ct >> 2)) - left;
597 ctx->D[3] = (tp + ct) - left;
599 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
602 static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
605 TM2_INIT_POINTERS_2();
608 for (j = 0; j < 2; j++) {
609 for (i = 0; i < 2; i++){
613 U += Ustride; V += Vstride;
614 Uo += oUstride; Vo += oVstride;
618 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
619 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
622 ctx->D[0] = Yo[3] - last[3];
623 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
624 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
625 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
627 for (j = 0; j < 4; j++) {
628 for (i = 0; i < 4; i++) {
637 static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
641 TM2_INIT_POINTERS_2();
644 for (j = 0; j < 2; j++) {
645 for (i = 0; i < 2; i++) {
646 U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD);
647 V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD);
656 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
657 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
660 ctx->D[0] = Yo[3] - last[3];
661 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
662 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
663 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
665 for (j = 0; j < 4; j++) {
667 for (i = 0; i < 4; i++) {
668 Y[i] = Yo[i] + GET_TOK(ctx, TM2_UPD);
671 ctx->D[j] = last[3] - d;
677 static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
681 TM2_INIT_POINTERS_2();
683 mx = GET_TOK(ctx, TM2_MOT);
684 my = GET_TOK(ctx, TM2_MOT);
685 mx = av_clip(mx, -(bx * 4 + 4), ctx->avctx->width - bx * 4);
686 my = av_clip(my, -(by * 4 + 4), ctx->avctx->height - by * 4);
688 if (4*bx+mx<0 || 4*by+my<0 || 4*bx+mx+4 > ctx->avctx->width || 4*by+my+4 > ctx->avctx->height) {
689 av_log(ctx->avctx, AV_LOG_ERROR, "MV out of picture\n");
693 Yo += my * oYstride + mx;
694 Uo += (my >> 1) * oUstride + (mx >> 1);
695 Vo += (my >> 1) * oVstride + (mx >> 1);
698 for (j = 0; j < 2; j++) {
699 for (i = 0; i < 2; i++) {
710 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
711 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
714 for (j = 0; j < 4; j++) {
715 for (i = 0; i < 4; i++) {
721 /* calculate deltas */
723 ctx->D[0] = Y[3] - last[3];
724 ctx->D[1] = Y[3 + Ystride] - Y[3];
725 ctx->D[2] = Y[3 + Ystride * 2] - Y[3 + Ystride];
726 ctx->D[3] = Y[3 + Ystride * 3] - Y[3 + Ystride * 2];
727 for (i = 0; i < 4; i++)
728 last[i] = Y[i + Ystride * 3];
731 static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
734 int w = ctx->avctx->width, h = ctx->avctx->height, bw = w >> 2, bh = h >> 2, cw = w >> 1;
740 for (i = 0; i < TM2_NUM_STREAMS; i++)
741 ctx->tok_ptrs[i] = 0;
743 if (ctx->tok_lens[TM2_TYPE]<bw*bh) {
744 av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh);
745 return AVERROR_INVALIDDATA;
748 memset(ctx->last, 0, 4 * bw * sizeof(int));
749 memset(ctx->clast, 0, 4 * bw * sizeof(int));
751 for (j = 0; j < bh; j++) {
752 memset(ctx->D, 0, 4 * sizeof(int));
753 memset(ctx->CD, 0, 4 * sizeof(int));
754 for (i = 0; i < bw; i++) {
755 type = GET_TOK(ctx, TM2_TYPE);
758 tm2_hi_res_block(ctx, p, i, j);
761 tm2_med_res_block(ctx, p, i, j);
764 tm2_low_res_block(ctx, p, i, j);
767 tm2_null_res_block(ctx, p, i, j);
770 tm2_update_block(ctx, p, i, j);
774 tm2_still_block(ctx, p, i, j);
778 tm2_motion_block(ctx, p, i, j);
782 av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type);
787 /* copy data from our buffer to AVFrame */
788 Y = (ctx->cur?ctx->Y2:ctx->Y1);
789 U = (ctx->cur?ctx->U2:ctx->U1);
790 V = (ctx->cur?ctx->V2:ctx->V1);
792 for (j = 0; j < h; j++) {
793 for (i = 0; i < w; i++) {
794 int y = Y[i], u = U[i >> 1], v = V[i >> 1];
795 dst[3*i+0] = av_clip_uint8(y + v);
796 dst[3*i+1] = av_clip_uint8(y);
797 dst[3*i+2] = av_clip_uint8(y + u);
800 /* horizontal edge extension */
801 Y[-4] = Y[-3] = Y[-2] = Y[-1] = Y[0];
802 Y[w + 3] = Y[w + 2] = Y[w + 1] = Y[w] = Y[w - 1];
804 /* vertical edge extension */
806 memcpy(Y - 4 - 1 * ctx->y_stride, Y - 4, ctx->y_stride);
807 memcpy(Y - 4 - 2 * ctx->y_stride, Y - 4, ctx->y_stride);
808 memcpy(Y - 4 - 3 * ctx->y_stride, Y - 4, ctx->y_stride);
809 memcpy(Y - 4 - 4 * ctx->y_stride, Y - 4, ctx->y_stride);
810 } else if (j == h - 1) {
811 memcpy(Y - 4 + 1 * ctx->y_stride, Y - 4, ctx->y_stride);
812 memcpy(Y - 4 + 2 * ctx->y_stride, Y - 4, ctx->y_stride);
813 memcpy(Y - 4 + 3 * ctx->y_stride, Y - 4, ctx->y_stride);
814 memcpy(Y - 4 + 4 * ctx->y_stride, Y - 4, ctx->y_stride);
819 /* horizontal edge extension */
820 U[-2] = U[-1] = U[0];
821 V[-2] = V[-1] = V[0];
822 U[cw + 1] = U[cw] = U[cw - 1];
823 V[cw + 1] = V[cw] = V[cw - 1];
825 /* vertical edge extension */
827 memcpy(U - 2 - 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
828 memcpy(V - 2 - 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
829 memcpy(U - 2 - 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
830 memcpy(V - 2 - 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
831 } else if (j == h - 1) {
832 memcpy(U - 2 + 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
833 memcpy(V - 2 + 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
834 memcpy(U - 2 + 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
835 memcpy(V - 2 + 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
841 dst += p->linesize[0];
847 static const int tm2_stream_order[TM2_NUM_STREAMS] = {
848 TM2_C_HI, TM2_C_LO, TM2_L_HI, TM2_L_LO, TM2_UPD, TM2_MOT, TM2_TYPE
851 #define TM2_HEADER_SIZE 40
853 static int decode_frame(AVCodecContext *avctx,
854 void *data, int *got_frame,
857 TM2Context * const l = avctx->priv_data;
858 const uint8_t *buf = avpkt->data;
859 int buf_size = avpkt->size & ~3;
860 AVFrame * const p = &l->pic;
861 int offset = TM2_HEADER_SIZE;
864 av_fast_padded_malloc(&l->buffer, &l->buffer_size, buf_size);
866 av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");
867 return AVERROR(ENOMEM);
870 p->buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
871 if ((ret = avctx->reget_buffer(avctx, p)) < 0) {
872 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
876 l->dsp.bswap_buf((uint32_t*)l->buffer, (const uint32_t*)buf, buf_size >> 2);
878 if ((ret = tm2_read_header(l, l->buffer)) < 0) {
882 for (i = 0; i < TM2_NUM_STREAMS; i++) {
883 if (offset >= buf_size) {
884 av_log(avctx, AV_LOG_ERROR, "no space for tm2_read_stream\n");
885 return AVERROR_INVALIDDATA;
888 t = tm2_read_stream(l, l->buffer + offset, tm2_stream_order[i],
891 int j = tm2_stream_order[i];
892 memset(l->tokens[j], 0, sizeof(**l->tokens) * l->tok_lens[j]);
897 p->key_frame = tm2_decode_blocks(l, p);
899 p->pict_type = AV_PICTURE_TYPE_I;
901 p->pict_type = AV_PICTURE_TYPE_P;
905 *(AVFrame*)data = l->pic;
910 static av_cold int decode_init(AVCodecContext *avctx)
912 TM2Context * const l = avctx->priv_data;
913 int i, w = avctx->width, h = avctx->height;
915 if ((avctx->width & 3) || (avctx->height & 3)) {
916 av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n");
917 return AVERROR(EINVAL);
921 l->pic.data[0] = NULL;
922 avctx->pix_fmt = AV_PIX_FMT_BGR24;
923 avcodec_get_frame_defaults(&l->pic);
925 ff_dsputil_init(&l->dsp, avctx);
927 l->last = av_malloc(4 * sizeof(*l->last) * (w >> 2));
928 l->clast = av_malloc(4 * sizeof(*l->clast) * (w >> 2));
930 for (i = 0; i < TM2_NUM_STREAMS; i++) {
937 l->Y1_base = av_mallocz(sizeof(*l->Y1_base) * w * h);
938 l->Y2_base = av_mallocz(sizeof(*l->Y2_base) * w * h);
942 l->U1_base = av_mallocz(sizeof(*l->U1_base) * w * h);
943 l->V1_base = av_mallocz(sizeof(*l->V1_base) * w * h);
944 l->U2_base = av_mallocz(sizeof(*l->U2_base) * w * h);
945 l->V2_base = av_mallocz(sizeof(*l->V1_base) * w * h);
948 if (!l->Y1_base || !l->Y2_base || !l->U1_base ||
949 !l->V1_base || !l->U2_base || !l->V2_base ||
950 !l->last || !l->clast) {
951 av_freep(l->Y1_base);
952 av_freep(l->Y2_base);
953 av_freep(l->U1_base);
954 av_freep(l->U2_base);
955 av_freep(l->V1_base);
956 av_freep(l->V2_base);
959 return AVERROR(ENOMEM);
961 l->Y1 = l->Y1_base + l->y_stride * 4 + 4;
962 l->Y2 = l->Y2_base + l->y_stride * 4 + 4;
963 l->U1 = l->U1_base + l->uv_stride * 2 + 2;
964 l->U2 = l->U2_base + l->uv_stride * 2 + 2;
965 l->V1 = l->V1_base + l->uv_stride * 2 + 2;
966 l->V2 = l->V2_base + l->uv_stride * 2 + 2;
971 static av_cold int decode_end(AVCodecContext *avctx)
973 TM2Context * const l = avctx->priv_data;
974 AVFrame *pic = &l->pic;
979 for (i = 0; i < TM2_NUM_STREAMS; i++)
980 av_free(l->tokens[i]);
989 av_freep(&l->buffer);
993 avctx->release_buffer(avctx, pic);
998 AVCodec ff_truemotion2_decoder = {
999 .name = "truemotion2",
1000 .type = AVMEDIA_TYPE_VIDEO,
1001 .id = AV_CODEC_ID_TRUEMOTION2,
1002 .priv_data_size = sizeof(TM2Context),
1003 .init = decode_init,
1004 .close = decode_end,
1005 .decode = decode_frame,
1006 .capabilities = CODEC_CAP_DR1,
1007 .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0"),