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ffmpeg / libavcodec / truemotion2.c @ 2029f312

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1
/*
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 * Duck/ON2 TrueMotion 2 Decoder
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 * Copyright (c) 2005 Konstantin Shishkov
4
 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 *
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 */
22

    
23
/**
24
 * @file truemotion2.c
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 * Duck TrueMotion2 decoder.
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 */
27

    
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#include "avcodec.h"
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#include "bitstream.h"
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#include "dsputil.h"
31

    
32
#define TM2_ESCAPE 0x80000000
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#define TM2_DELTAS 64
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,
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     TM2_UPD, TM2_MOT, TM2_TYPE, TM2_NUM_STREAMS};
37
/* Block types */
38
enum TM2_BLOCKS{ TM2_HI_RES = 0, TM2_MED_RES, TM2_LOW_RES, TM2_NULL_RES,
39
                 TM2_UPDATE, TM2_STILL, TM2_MOTION};
40

    
41
typedef struct TM2Context{
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    AVCodecContext *avctx;
43
    AVFrame pic;
44

    
45
    GetBitContext gb;
46
    DSPContext dsp;
47

    
48
    /* TM2 streams */
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 */
54
    int D[4];
55
    int CD[4];
56
    int *last;
57
    int *clast;
58

    
59
    /* data for current and previous frame */
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    int *Y1, *U1, *V1, *Y2, *U2, *V2;
61
    int cur;
62
} TM2Context;
63

    
64
/**
65
* Huffman codes for each of streams
66
*/
67
typedef struct TM2Codes{
68
    VLC vlc; ///< table for FFmpeg bitstream reader
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    int bits;
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    int *recode; ///< table for converting from code indexes to values
71
    int length;
72
} TM2Codes;
73

    
74
/**
75
* structure for gathering Huffman codes information
76
*/
77
typedef struct TM2Huff{
78
    int val_bits; ///< length of literal
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    int max_bits; ///< maximum length of code
80
    int min_bits; ///< minimum length of code
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    int nodes; ///< total number of nodes in tree
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    int num; ///< current number filled
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    int max_num; ///< total number of codes
84
    int *nums; ///< literals
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    uint32_t *bits; ///< codes
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    int *lens; ///< codelengths
87
} TM2Huff;
88

    
89
static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff)
90
{
91
    if(length > huff->max_bits) {
92
        av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n", huff->max_bits);
93
        return -1;
94
    }
95

    
96
    if(!get_bits1(&ctx->gb)) { /* literal */
97
        if (length == 0) {
98
            length = 1;
99
        }
100
        if(huff->num >= huff->max_num) {
101
            av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n");
102
            return -1;
103
        }
104
        huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits);
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        huff->bits[huff->num] = prefix;
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        huff->lens[huff->num] = length;
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        huff->num++;
108
        return 0;
109
    } else { /* non-terminal node */
110
        if(tm2_read_tree(ctx, prefix << 1, length + 1, huff) == -1)
111
            return -1;
112
        if(tm2_read_tree(ctx, (prefix << 1) | 1, length + 1, huff) == -1)
113
            return -1;
114
    }
115
    return 0;
116
}
117

    
118
static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code)
119
{
120
    TM2Huff huff;
121
    int res = 0;
122

    
123
    huff.val_bits = get_bits(&ctx->gb, 5);
124
    huff.max_bits = get_bits(&ctx->gb, 5);
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    huff.min_bits = get_bits(&ctx->gb, 5);
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    huff.nodes = get_bits_long(&ctx->gb, 17);
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    huff.num = 0;
128

    
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);
134
        return -1;
135
    }
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);
138
        return -1;
139
    }
140
    /* one-node tree */
141
    if(huff.max_bits == 0)
142
        huff.max_bits = 1;
143

    
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));
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    huff.bits = av_mallocz(huff.max_num * sizeof(uint32_t));
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    huff.lens = av_mallocz(huff.max_num * sizeof(int));
149

    
150
    if(tm2_read_tree(ctx, 0, 0, &huff) == -1)
151
        res = -1;
152

    
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);
156
        res = -1;
157
    }
158

    
159
    /* convert codes to vlc_table */
160
    if(res != -1) {
161
        int i;
162

    
163
        res = init_vlc(&code->vlc, huff.max_bits, huff.max_num,
164
                    huff.lens, sizeof(int), sizeof(int),
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                    huff.bits, sizeof(uint32_t), sizeof(uint32_t), 0);
166
        if(res < 0) {
167
            av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
168
            res = -1;
169
        } else
170
            res = 0;
171
        if(res != -1) {
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];
177
        }
178
    }
179
    /* free allocated memory */
180
    av_free(huff.nums);
181
    av_free(huff.bits);
182
    av_free(huff.lens);
183

    
184
    return res;
185
}
186

    
187
static void tm2_free_codes(TM2Codes *code)
188
{
189
    if(code->recode)
190
        av_free(code->recode);
191
    if(code->vlc.table)
192
        free_vlc(&code->vlc);
193
}
194

    
195
static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code)
196
{
197
    int val;
198
    val = get_vlc2(gb, code->vlc.table, code->bits, 1);
199
    return code->recode[val];
200
}
201

    
202
static inline int tm2_read_header(TM2Context *ctx, uint8_t *buf)
203
{
204
    uint32_t magic;
205
    uint8_t *obuf;
206
    int length;
207

    
208
    obuf = buf;
209

    
210
    magic = AV_RL32(buf);
211
    buf += 4;
212

    
213
    if(magic == 0x00000100) { /* old header */
214
/*      av_log (ctx->avctx, AV_LOG_ERROR, "TM2 old header: not implemented (yet)\n"); */
215
        return 40;
216
    } else if(magic == 0x00000101) { /* new header */
217
        int w, h, size, flags, xr, yr;
218

    
219
        length = AV_RL32(buf);
220
        buf += 4;
221

    
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);
229

    
230
        return 40;
231
    } else {
232
        av_log (ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08X\n", magic);
233
        return -1;
234
    }
235

    
236
    return (buf - obuf);
237
}
238

    
239
static int tm2_read_deltas(TM2Context *ctx, int stream_id) {
240
    int d, mb;
241
    int i, v;
242

    
243
    d = get_bits(&ctx->gb, 9);
244
    mb = get_bits(&ctx->gb, 5);
245

    
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);
248
        return -1;
249
    }
250

    
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);
255
        else
256
            ctx->deltas[stream_id][i] = v;
257
    }
258
    for(; i < TM2_DELTAS; i++)
259
        ctx->deltas[stream_id][i] = 0;
260

    
261
    return 0;
262
}
263

    
264
static int tm2_read_stream(TM2Context *ctx, uint8_t *buf, int stream_id) {
265
    int i;
266
    int cur = 0;
267
    int skip = 0;
268
    int len, toks;
269
    TM2Codes codes;
270

    
271
    /* get stream length in dwords */
272
    len = AV_RB32(buf); buf += 4; cur += 4;
273
    skip = len * 4 + 4;
274

    
275
    if(len == 0)
276
        return 4;
277

    
278
    toks = AV_RB32(buf); buf += 4; cur += 4;
279
    if(toks & 1) {
280
        len = AV_RB32(buf); buf += 4; cur += 4;
281
        if(len == TM2_ESCAPE) {
282
            len = AV_RB32(buf); buf += 4; cur += 4;
283
        }
284
        if(len > 0) {
285
            init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
286
            if(tm2_read_deltas(ctx, stream_id) == -1)
287
                return -1;
288
            buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
289
            cur += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
290
        }
291
    }
292
    /* skip unused fields */
293
    if(AV_RB32(buf) == TM2_ESCAPE) {
294
        buf += 4; cur += 4; /* some unknown length - could be escaped too */
295
    }
296
    buf += 4; cur += 4;
297
    buf += 4; cur += 4; /* unused by decoder */
298

    
299
    init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
300
    if(tm2_build_huff_table(ctx, &codes) == -1)
301
        return -1;
302
    buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
303
    cur += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
304

    
305
    toks >>= 1;
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);
310
        return -1;
311
    }
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;
315
    if(len > 0) {
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);
319
    } else {
320
        for(i = 0; i < toks; i++)
321
            ctx->tokens[stream_id][i] = codes.recode[0];
322
    }
323
    tm2_free_codes(&codes);
324

    
325
    return skip;
326
}
327

    
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]);
331
        return 0;
332
    }
333
    if(type <= TM2_MOT)
334
        return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]];
335
    return ctx->tokens[type][ctx->tok_ptrs[type]++];
336
}
337

    
338
/* blocks decoding routines */
339

    
340
/* common Y, U, V pointers initialisation */
341
#define TM2_INIT_POINTERS() \
342
    int *last, *clast; \
343
    int *Y, *U, *V;\
344
    int Ystride, Ustride, Vstride;\
345
\
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;
354

    
355
#define TM2_INIT_POINTERS_2() \
356
    int *Yo, *Uo, *Vo;\
357
    int oYstride, oUstride, oVstride;\
358
\
359
    TM2_INIT_POINTERS();\
360
    oYstride = Ystride;\
361
    oVstride = Vstride;\
362
    oUstride = Ustride;\
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;
366

    
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;}
373

    
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)
376
{
377
    int ct, d;
378
    int i, j;
379

    
380
    for(j = 0; j < 4; j++){
381
        ct = ctx->D[j];
382
        for(i = 0; i < 4; i++){
383
            d = deltas[i + j * 4];
384
            ct += d;
385
            last[i] += ct;
386
            Y[i] = av_clip_uint8(last[i]);
387
        }
388
        Y += stride;
389
        ctx->D[j] = ct;
390
    }
391
}
392

    
393
static inline void tm2_high_chroma(int *data, int stride, int *last, int *CD, int *deltas)
394
{
395
    int i, j;
396
    for(j = 0; j < 2; j++){
397
        for(i = 0; i < 2; i++){
398
            CD[j] += deltas[i + j * 2];
399
            last[i] += CD[j];
400
            data[i] = last[i] + 128;
401
        }
402
        data += stride;
403
    }
404
}
405

    
406
static inline void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx)
407
{
408
    int t;
409
    int l;
410
    int prev;
411

    
412
    if(bx > 0)
413
        prev = clast[-3];
414
    else
415
        prev = 0;
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;
419
    CD[0] = t;
420
    clast[0] = l;
421

    
422
    tm2_high_chroma(data, stride, clast, CD, deltas);
423
}
424

    
425
static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
426
{
427
    int i;
428
    int deltas[16];
429
    TM2_INIT_POINTERS();
430

    
431
    /* hi-res chroma */
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);
435
    }
436
    tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas);
437
    tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4);
438

    
439
    /* hi-res luma */
440
    for(i = 0; i < 16; i++)
441
        deltas[i] = GET_TOK(ctx, TM2_L_HI);
442

    
443
    tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
444
}
445

    
446
static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
447
{
448
    int i;
449
    int deltas[16];
450
    TM2_INIT_POINTERS();
451

    
452
    /* low-res chroma */
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);
456

    
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);
460

    
461
    /* hi-res luma */
462
    for(i = 0; i < 16; i++)
463
        deltas[i] = GET_TOK(ctx, TM2_L_HI);
464

    
465
    tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
466
}
467

    
468
static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
469
{
470
    int i;
471
    int t1, t2;
472
    int deltas[16];
473
    TM2_INIT_POINTERS();
474

    
475
    /* low-res chroma */
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);
479

    
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);
483

    
484
    /* low-res luma */
485
    for(i = 0; i < 16; i++)
486
        deltas[i] = 0;
487

    
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);
492

    
493
    if(bx > 0)
494
        last[0] = (last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1;
495
    else
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;
498

    
499
    t1 = ctx->D[0] + ctx->D[1];
500
    ctx->D[0] = t1 >> 1;
501
    ctx->D[1] = t1 - (t1 >> 1);
502
    t2 = ctx->D[2] + ctx->D[3];
503
    ctx->D[2] = t2 >> 1;
504
    ctx->D[3] = t2 - (t2 >> 1);
505

    
506
    tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
507
}
508

    
509
static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
510
{
511
    int i;
512
    int ct;
513
    int left, right, diff;
514
    int deltas[16];
515
    TM2_INIT_POINTERS();
516

    
517
    /* null chroma */
518
    deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
519
    tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
520

    
521
    deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
522
    tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
523

    
524
    /* null luma */
525
    for(i = 0; i < 16; i++)
526
        deltas[i] = 0;
527

    
528
    ct = ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3];
529

    
530
    if(bx > 0)
531
        left = last[-1] - ct;
532
    else
533
        left = 0;
534

    
535
    right = last[3];
536
    diff = right - left;
537
    last[0] = left + (diff >> 2);
538
    last[1] = left + (diff >> 1);
539
    last[2] = right - (diff >> 2);
540
    last[3] = right;
541
    {
542
        int tp = left;
543

    
544
        ctx->D[0] = (tp + (ct >> 2)) - left;
545
        left += ctx->D[0];
546
        ctx->D[1] = (tp + (ct >> 1)) - left;
547
        left += ctx->D[1];
548
        ctx->D[2] = ((tp + ct) - (ct >> 2)) - left;
549
        left += ctx->D[2];
550
        ctx->D[3] = (tp + ct) - left;
551
    }
552
    tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
553
}
554

    
555
static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
556
{
557
    int i, j;
558
    TM2_INIT_POINTERS_2();
559

    
560
    /* update chroma */
561
    for(j = 0; j < 2; j++){
562
        for(i = 0; i < 2; i++){
563
            U[i] = Uo[i];
564
            V[i] = Vo[i];
565
        }
566
        U += Ustride; V += Vstride;
567
        Uo += oUstride; Vo += oVstride;
568
    }
569
    U -= Ustride * 2;
570
    V -= Vstride * 2;
571
    TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
572
    TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
573

    
574
    /* update deltas */
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];
579

    
580
    for(j = 0; j < 4; j++){
581
        for(i = 0; i < 4; i++){
582
            Y[i] = Yo[i];
583
            last[i] = Yo[i];
584
        }
585
        Y += Ystride;
586
        Yo += oYstride;
587
    }
588
}
589

    
590
static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
591
{
592
    int i, j;
593
    int d;
594
    TM2_INIT_POINTERS_2();
595

    
596
    /* update chroma */
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);
601
        }
602
        U += Ustride; V += Vstride;
603
        Uo += oUstride; Vo += oVstride;
604
    }
605
    U -= Ustride * 2;
606
    V -= Vstride * 2;
607
    TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
608
    TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
609

    
610
    /* update deltas */
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];
615

    
616
    for(j = 0; j < 4; j++){
617
        d = last[3];
618
        for(i = 0; i < 4; i++){
619
            Y[i] = Yo[i] + GET_TOK(ctx, TM2_UPD);
620
            last[i] = Y[i];
621
        }
622
        ctx->D[j] = last[3] - d;
623
        Y += Ystride;
624
        Yo += oYstride;
625
    }
626
}
627

    
628
static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
629
{
630
    int i, j;
631
    int mx, my;
632
    TM2_INIT_POINTERS_2();
633

    
634
    mx = GET_TOK(ctx, TM2_MOT);
635
    my = GET_TOK(ctx, TM2_MOT);
636

    
637
    Yo += my * oYstride + mx;
638
    Uo += (my >> 1) * oUstride + (mx >> 1);
639
    Vo += (my >> 1) * oVstride + (mx >> 1);
640

    
641
    /* copy chroma */
642
    for(j = 0; j < 2; j++){
643
        for(i = 0; i < 2; i++){
644
            U[i] = Uo[i];
645
            V[i] = Vo[i];
646
        }
647
        U += Ustride; V += Vstride;
648
        Uo += oUstride; Vo += oVstride;
649
    }
650
    U -= Ustride * 2;
651
    V -= Vstride * 2;
652
    TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
653
    TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
654

    
655
    /* copy luma */
656
    for(j = 0; j < 4; j++){
657
        for(i = 0; i < 4; i++){
658
            Y[i] = Yo[i];
659
        }
660
        Y += Ystride;
661
        Yo += oYstride;
662
    }
663
    /* calculate deltas */
664
    Y -= Ystride * 4;
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];
671
}
672

    
673
static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
674
{
675
    int i, j;
676
    int bw, bh;
677
    int type;
678
    int keyframe = 1;
679
    uint8_t *Y, *U, *V;
680
    int *src;
681

    
682
    bw = ctx->avctx->width >> 2;
683
    bh = ctx->avctx->height >> 2;
684

    
685
    for(i = 0; i < TM2_NUM_STREAMS; i++)
686
        ctx->tok_ptrs[i] = 0;
687

    
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);
690
        return -1;
691
    }
692

    
693
    memset(ctx->last, 0, 4 * bw * sizeof(int));
694
    memset(ctx->clast, 0, 4 * bw * sizeof(int));
695

    
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);
701
            switch(type) {
702
            case TM2_HI_RES:
703
                tm2_hi_res_block(ctx, p, i, j);
704
                break;
705
            case TM2_MED_RES:
706
                tm2_med_res_block(ctx, p, i, j);
707
                break;
708
            case TM2_LOW_RES:
709
                tm2_low_res_block(ctx, p, i, j);
710
                break;
711
            case TM2_NULL_RES:
712
                tm2_null_res_block(ctx, p, i, j);
713
                break;
714
            case TM2_UPDATE:
715
                tm2_update_block(ctx, p, i, j);
716
                keyframe = 0;
717
                break;
718
            case TM2_STILL:
719
                tm2_still_block(ctx, p, i, j);
720
                keyframe = 0;
721
                break;
722
            case TM2_MOTION:
723
                tm2_motion_block(ctx, p, i, j);
724
                keyframe = 0;
725
                break;
726
            default:
727
                av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type);
728
            }
729
        }
730
    }
731

    
732
    /* copy data from our buffer to AVFrame */
733
    Y = p->data[0];
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++);
738
        }
739
        Y += p->linesize[0];
740
    }
741
    U = p->data[2];
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++);
746
        }
747
        U += p->linesize[2];
748
    }
749
    V = p->data[1];
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++);
754
        }
755
        V += p->linesize[1];
756
    }
757

    
758
    return keyframe;
759
}
760

    
761
static int decode_frame(AVCodecContext *avctx,
762
                        void *data, int *data_size,
763
                        uint8_t *buf, int buf_size)
764
{
765
    TM2Context * const l = avctx->priv_data;
766
    AVFrame * const p= (AVFrame*)&l->pic;
767
    int skip, t;
768

    
769
    p->reference = 1;
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");
773
        return -1;
774
    }
775

    
776
    l->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, buf_size >> 2);
777
    skip = tm2_read_header(l, buf);
778

    
779
    if(skip == -1)
780
        return -1;
781

    
782
    t = tm2_read_stream(l, buf + skip, TM2_C_HI);
783
    if(t == -1)
784
        return -1;
785
    skip += t;
786
    t = tm2_read_stream(l, buf + skip, TM2_C_LO);
787
    if(t == -1)
788
        return -1;
789
    skip += t;
790
    t = tm2_read_stream(l, buf + skip, TM2_L_HI);
791
    if(t == -1)
792
        return -1;
793
    skip += t;
794
    t = tm2_read_stream(l, buf + skip, TM2_L_LO);
795
    if(t == -1)
796
        return -1;
797
    skip += t;
798
    t = tm2_read_stream(l, buf + skip, TM2_UPD);
799
    if(t == -1)
800
        return -1;
801
    skip += t;
802
    t = tm2_read_stream(l, buf + skip, TM2_MOT);
803
    if(t == -1)
804
        return -1;
805
    skip += t;
806
    t = tm2_read_stream(l, buf + skip, TM2_TYPE);
807
    if(t == -1)
808
        return -1;
809
    p->key_frame = tm2_decode_blocks(l, p);
810
    if(p->key_frame)
811
        p->pict_type = FF_I_TYPE;
812
    else
813
        p->pict_type = FF_P_TYPE;
814

    
815
    l->cur = !l->cur;
816
    *data_size = sizeof(AVFrame);
817
    *(AVFrame*)data = l->pic;
818

    
819
    return buf_size;
820
}
821

    
822
static int decode_init(AVCodecContext *avctx){
823
    TM2Context * const l = avctx->priv_data;
824
    int i;
825

    
826
    if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
827
        return -1;
828
    }
829
    if((avctx->width & 3) || (avctx->height & 3)){
830
        av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n");
831
        return -1;
832
    }
833

    
834
    l->avctx = avctx;
835
    l->pic.data[0]=NULL;
836
    avctx->pix_fmt = PIX_FMT_YUV420P;
837

    
838
    dsputil_init(&l->dsp, avctx);
839

    
840
    l->last = av_malloc(4 * sizeof(int) * (avctx->width >> 2));
841
    l->clast = av_malloc(4 * sizeof(int) * (avctx->width >> 2));
842

    
843
    for(i = 0; i < TM2_NUM_STREAMS; i++) {
844
        l->tokens[i] = NULL;
845
        l->tok_lens[i] = 0;
846
    }
847

    
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));
854
    l->cur = 0;
855

    
856
    return 0;
857
}
858

    
859
static int decode_end(AVCodecContext *avctx){
860
    TM2Context * const l = avctx->priv_data;
861
    int i;
862

    
863
    if(l->last)
864
        av_free(l->last);
865
    if(l->clast)
866
        av_free(l->clast);
867
    for(i = 0; i < TM2_NUM_STREAMS; i++)
868
        if(l->tokens[i])
869
            av_free(l->tokens[i]);
870
    if(l->Y1){
871
        av_free(l->Y1);
872
        av_free(l->U1);
873
        av_free(l->V1);
874
        av_free(l->Y2);
875
        av_free(l->U2);
876
        av_free(l->V2);
877
    }
878
    return 0;
879
}
880

    
881
AVCodec truemotion2_decoder = {
882
    "truemotion2",
883
    CODEC_TYPE_VIDEO,
884
    CODEC_ID_TRUEMOTION2,
885
    sizeof(TM2Context),
886
    decode_init,
887
    NULL,
888
    decode_end,
889
    decode_frame,
890
    CODEC_CAP_DR1,
891
};