GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/fic.c Lines: 194 229 84.7 %
Date: 2019-11-22 03:34:36 Branches: 85 118 72.0 %

Line Branch Exec Source
1
/*
2
 * Mirillis FIC decoder
3
 *
4
 * Copyright (c) 2014 Konstantin Shishkov
5
 * Copyright (c) 2014 Derek Buitenhuis
6
 *
7
 * This file is part of FFmpeg.
8
 *
9
 * FFmpeg is free software; you can redistribute it and/or
10
 * modify it under the terms of the GNU Lesser General Public
11
 * License as published by the Free Software Foundation; either
12
 * version 2.1 of the License, or (at your option) any later version.
13
 *
14
 * FFmpeg is distributed in the hope that it will be useful,
15
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17
 * Lesser General Public License for more details.
18
 *
19
 * You should have received a copy of the GNU Lesser General Public
20
 * License along with FFmpeg; if not, write to the Free Software
21
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22
 */
23
24
#include "libavutil/common.h"
25
#include "libavutil/opt.h"
26
#include "avcodec.h"
27
#include "internal.h"
28
#include "get_bits.h"
29
#include "golomb.h"
30
31
typedef struct FICThreadContext {
32
    DECLARE_ALIGNED(16, int16_t, block)[64];
33
    uint8_t *src;
34
    int slice_h;
35
    int src_size;
36
    int y_off;
37
    int p_frame;
38
} FICThreadContext;
39
40
typedef struct FICContext {
41
    AVClass *class;
42
    AVCodecContext *avctx;
43
    AVFrame *frame;
44
    AVFrame *final_frame;
45
46
    FICThreadContext *slice_data;
47
    int slice_data_size;
48
49
    const uint8_t *qmat;
50
51
    enum AVPictureType cur_frame_type;
52
53
    int aligned_width, aligned_height;
54
    int num_slices, slice_h;
55
56
    uint8_t cursor_buf[4096];
57
    int skip_cursor;
58
} FICContext;
59
60
static const uint8_t fic_qmat_hq[64] = {
61
    1, 2, 2, 2, 3, 3, 3, 4,
62
    2, 2, 2, 3, 3, 3, 4, 4,
63
    2, 2, 3, 3, 3, 4, 4, 4,
64
    2, 2, 3, 3, 3, 4, 4, 5,
65
    2, 3, 3, 3, 4, 4, 5, 6,
66
    3, 3, 3, 4, 4, 5, 6, 7,
67
    3, 3, 3, 4, 4, 5, 7, 7,
68
    3, 3, 4, 4, 5, 7, 7, 7,
69
};
70
71
static const uint8_t fic_qmat_lq[64] = {
72
    1,  5,  6,  7,  8,  9,  9, 11,
73
    5,  5,  7,  8,  9,  9, 11, 12,
74
    6,  7,  8,  9,  9, 11, 11, 12,
75
    7,  7,  8,  9,  9, 11, 12, 13,
76
    7,  8,  9,  9, 10, 11, 13, 16,
77
    8,  9,  9, 10, 11, 13, 16, 19,
78
    8,  9,  9, 11, 12, 15, 18, 23,
79
    9,  9, 11, 12, 15, 18, 23, 27
80
};
81
82
static const uint8_t fic_header[7] = { 0, 0, 1, 'F', 'I', 'C', 'V' };
83
84
#define FIC_HEADER_SIZE 27
85
#define CURSOR_OFFSET 59
86
87
1030768
static av_always_inline void fic_idct(int16_t *blk, int step, int shift, int rnd)
88
{
89
1030768
    const unsigned t0 =  27246 * blk[3 * step] + 18405 * blk[5 * step];
90
1030768
    const unsigned t1 =  27246 * blk[5 * step] - 18405 * blk[3 * step];
91
1030768
    const unsigned t2 =   6393 * blk[7 * step] + 32139 * blk[1 * step];
92
1030768
    const unsigned t3 =   6393 * blk[1 * step] - 32139 * blk[7 * step];
93
1030768
    const unsigned t4 = 5793U * ((int)(t2 + t0 + 0x800) >> 12);
94
1030768
    const unsigned t5 = 5793U * ((int)(t3 + t1 + 0x800) >> 12);
95
1030768
    const unsigned t6 = t2 - t0;
96
1030768
    const unsigned t7 = t3 - t1;
97
1030768
    const unsigned t8 =  17734 * blk[2 * step] - 42813 * blk[6 * step];
98
1030768
    const unsigned t9 =  17734 * blk[6 * step] + 42814 * blk[2 * step];
99
1030768
    const unsigned tA = (blk[0 * step] - blk[4 * step]) * 32768 + rnd;
100
1030768
    const unsigned tB = (blk[0 * step] + blk[4 * step]) * 32768 + rnd;
101
1030768
    blk[0 * step] = (int)(  t4       + t9 + tB) >> shift;
102
1030768
    blk[1 * step] = (int)(  t6 + t7  + t8 + tA) >> shift;
103
1030768
    blk[2 * step] = (int)(  t6 - t7  - t8 + tA) >> shift;
104
1030768
    blk[3 * step] = (int)(  t5       - t9 + tB) >> shift;
105
1030768
    blk[4 * step] = (int)( -t5       - t9 + tB) >> shift;
106
1030768
    blk[5 * step] = (int)(-(t6 - t7) - t8 + tA) >> shift;
107
1030768
    blk[6 * step] = (int)(-(t6 + t7) + t8 + tA) >> shift;
108
1030768
    blk[7 * step] = (int)( -t4       + t9 + tB) >> shift;
109
1030768
}
110
111
64423
static void fic_idct_put(uint8_t *dst, int stride, int16_t *block)
112
{
113
    int i, j;
114
    int16_t *ptr;
115
116
64423
    ptr = block;
117
64423
    fic_idct(ptr++, 8, 13, (1 << 12) + (1 << 17));
118
515384
    for (i = 1; i < 8; i++) {
119
450961
        fic_idct(ptr, 8, 13, 1 << 12);
120
450961
        ptr++;
121
    }
122
123
64423
    ptr = block;
124
579807
    for (i = 0; i < 8; i++) {
125
515384
        fic_idct(ptr, 1, 20, 0);
126
515384
        ptr += 8;
127
    }
128
129
64423
    ptr = block;
130
579807
    for (j = 0; j < 8; j++) {
131
4638456
        for (i = 0; i < 8; i++)
132
4123072
            dst[i] = av_clip_uint8(ptr[i]);
133
515384
        dst += stride;
134
515384
        ptr += 8;
135
    }
136
64423
}
137
538550
static int fic_decode_block(FICContext *ctx, GetBitContext *gb,
138
                            uint8_t *dst, int stride, int16_t *block, int *is_p)
139
{
140
    int i, num_coeff;
141
142
538550
    if (get_bits_left(gb) < 8)
143
3
        return AVERROR_INVALIDDATA;
144
145
    /* Is it a skip block? */
146
538547
    if (get_bits1(gb)) {
147
474124
        *is_p = 1;
148
474124
        return 0;
149
    }
150
151
64423
    memset(block, 0, sizeof(*block) * 64);
152
153
64423
    num_coeff = get_bits(gb, 7);
154
64423
    if (num_coeff > 64)
155
        return AVERROR_INVALIDDATA;
156
157
1189311
    for (i = 0; i < num_coeff; i++) {
158
1124888
        int v = get_se_golomb(gb);
159

1124888
        if (v < -2048 || v > 2048)
160
             return AVERROR_INVALIDDATA;
161
1124888
        block[ff_zigzag_direct[i]] = v *
162
1124888
                                     ctx->qmat[ff_zigzag_direct[i]];
163
    }
164
165
64423
    fic_idct_put(dst, stride, block);
166
167
64423
    return 0;
168
}
169
170
92
static int fic_decode_slice(AVCodecContext *avctx, void *tdata)
171
{
172
92
    FICContext *ctx        = avctx->priv_data;
173
92
    FICThreadContext *tctx = tdata;
174
    GetBitContext gb;
175
92
    uint8_t *src = tctx->src;
176
92
    int slice_h  = tctx->slice_h;
177
92
    int src_size = tctx->src_size;
178
92
    int y_off    = tctx->y_off;
179
    int x, y, p, ret;
180
181
92
    ret = init_get_bits8(&gb, src, src_size);
182
92
    if (ret < 0)
183
4
        return ret;
184
185
349
    for (p = 0; p < 3; p++) {
186
264
        int stride   = ctx->frame->linesize[p];
187
264
        uint8_t* dst = ctx->frame->data[p] + (y_off >> !!p) * stride;
188
189
4485
        for (y = 0; y < (slice_h >> !!p); y += 8) {
190
542771
            for (x = 0; x < (ctx->aligned_width >> !!p); x += 8) {
191
                int ret;
192
193
538550
                if ((ret = fic_decode_block(ctx, &gb, dst + x, stride,
194
538550
                                            tctx->block, &tctx->p_frame)) != 0)
195
3
                    return ret;
196
            }
197
198
4221
            dst += 8 * stride;
199
        }
200
    }
201
202
85
    return 0;
203
}
204
205
1472
static av_always_inline void fic_alpha_blend(uint8_t *dst, uint8_t *src,
206
                                             int size, uint8_t *alpha)
207
{
208
    int i;
209
210
36800
    for (i = 0; i < size; i++)
211
35328
        dst[i] += ((src[i] - dst[i]) * alpha[i]) >> 8;
212
1472
}
213
214
23
static void fic_draw_cursor(AVCodecContext *avctx, int cur_x, int cur_y)
215
{
216
23
    FICContext *ctx = avctx->priv_data;
217
23
    uint8_t *ptr    = ctx->cursor_buf;
218
    uint8_t *dstptr[3];
219
    uint8_t planes[4][1024];
220
    uint8_t chroma[3][256];
221
    int i, j, p;
222
223
    /* Convert to YUVA444. */
224
23575
    for (i = 0; i < 1024; i++) {
225
23552
        planes[0][i] = (( 25 * ptr[0] + 129 * ptr[1] +  66 * ptr[2]) / 255) + 16;
226
23552
        planes[1][i] = ((-38 * ptr[0] + 112 * ptr[1] + -74 * ptr[2]) / 255) + 128;
227
23552
        planes[2][i] = ((-18 * ptr[0] + 112 * ptr[1] + -94 * ptr[2]) / 255) + 128;
228
23552
        planes[3][i] = ptr[3];
229
230
23552
        ptr += 4;
231
    }
232
233
    /* Subsample chroma. */
234
391
    for (i = 0; i < 32; i += 2)
235
6256
        for (j = 0; j < 32; j += 2)
236
23552
            for (p = 0; p < 3; p++)
237
17664
                chroma[p][16 * (i / 2) + j / 2] = (planes[p + 1][32 *  i      + j    ] +
238
17664
                                                   planes[p + 1][32 *  i      + j + 1] +
239
17664
                                                   planes[p + 1][32 * (i + 1) + j    ] +
240
17664
                                                   planes[p + 1][32 * (i + 1) + j + 1]) / 4;
241
242
    /* Seek to x/y pos of cursor. */
243
92
    for (i = 0; i < 3; i++)
244
69
        dstptr[i] = ctx->final_frame->data[i]                        +
245
69
                    (ctx->final_frame->linesize[i] * (cur_y >> !!i)) +
246
69
                    (cur_x >> !!i) + !!i;
247
248
    /* Copy. */
249
391
    for (i = 0; i < FFMIN(32, avctx->height - cur_y) - 1; i += 2) {
250
368
        int lsize = FFMIN(32, avctx->width - cur_x);
251
368
        int csize = lsize / 2;
252
253
368
        fic_alpha_blend(dstptr[0],
254
368
                        planes[0] + i * 32, lsize, planes[3] + i * 32);
255
368
        fic_alpha_blend(dstptr[0] + ctx->final_frame->linesize[0],
256
368
                        planes[0] + (i + 1) * 32, lsize, planes[3] + (i + 1) * 32);
257
368
        fic_alpha_blend(dstptr[1],
258
368
                        chroma[0] + (i / 2) * 16, csize, chroma[2] + (i / 2) * 16);
259
368
        fic_alpha_blend(dstptr[2],
260
368
                        chroma[1] + (i / 2) * 16, csize, chroma[2] + (i / 2) * 16);
261
262
368
        dstptr[0] += ctx->final_frame->linesize[0] * 2;
263
368
        dstptr[1] += ctx->final_frame->linesize[1];
264
368
        dstptr[2] += ctx->final_frame->linesize[2];
265
    }
266
23
}
267
268
121
static int fic_decode_frame(AVCodecContext *avctx, void *data,
269
                            int *got_frame, AVPacket *avpkt)
270
{
271
121
    FICContext *ctx = avctx->priv_data;
272
121
    uint8_t *src = avpkt->data;
273
    int ret;
274
    int slice, nslices;
275
    int msize;
276
    int tsize;
277
    int cur_x, cur_y;
278
121
    int skip_cursor = ctx->skip_cursor;
279
    uint8_t *sdata;
280
281
121
    if ((ret = ff_reget_buffer(avctx, ctx->frame, 0)) < 0)
282
        return ret;
283
284
    /* Header + at least one slice (4) */
285
121
    if (avpkt->size < FIC_HEADER_SIZE + 4) {
286
        av_log(avctx, AV_LOG_ERROR, "Frame data is too small.\n");
287
        return AVERROR_INVALIDDATA;
288
    }
289
290
    /* Check for header. */
291
121
    if (memcmp(src, fic_header, 7))
292
        av_log(avctx, AV_LOG_WARNING, "Invalid FIC Header.\n");
293
294
    /* Is it a skip frame? */
295
121
    if (src[17]) {
296
98
        if (!ctx->final_frame) {
297
            av_log(avctx, AV_LOG_WARNING, "Initial frame is skipped\n");
298
            return AVERROR_INVALIDDATA;
299
        }
300
98
        goto skip;
301
    }
302
303
23
    nslices = src[13];
304
23
    if (!nslices) {
305
        av_log(avctx, AV_LOG_ERROR, "Zero slices found.\n");
306
        return AVERROR_INVALIDDATA;
307
    }
308
309
    /* High or Low Quality Matrix? */
310
23
    ctx->qmat = src[23] ? fic_qmat_hq : fic_qmat_lq;
311
312
    /* Skip cursor data. */
313
23
    tsize = AV_RB24(src + 24);
314
23
    if (tsize > avpkt->size - FIC_HEADER_SIZE) {
315
        av_log(avctx, AV_LOG_ERROR,
316
               "Packet is too small to contain cursor (%d vs %d bytes).\n",
317
               tsize, avpkt->size - FIC_HEADER_SIZE);
318
        return AVERROR_INVALIDDATA;
319
    }
320
321

23
    if (!tsize || !AV_RL16(src + 37) || !AV_RL16(src + 39))
322
        skip_cursor = 1;
323
324

23
    if (!skip_cursor && tsize < 32) {
325
        av_log(avctx, AV_LOG_WARNING,
326
               "Cursor data too small. Skipping cursor.\n");
327
        skip_cursor = 1;
328
    }
329
330
    /* Cursor position. */
331
23
    cur_x = AV_RL16(src + 33);
332
23
    cur_y = AV_RL16(src + 35);
333

23
    if (!skip_cursor && (cur_x > avctx->width || cur_y > avctx->height)) {
334
        av_log(avctx, AV_LOG_DEBUG,
335
               "Invalid cursor position: (%d,%d). Skipping cursor.\n",
336
               cur_x, cur_y);
337
        skip_cursor = 1;
338
    }
339
340

23
    if (!skip_cursor && (AV_RL16(src + 37) != 32 || AV_RL16(src + 39) != 32)) {
341
        av_log(avctx, AV_LOG_WARNING,
342
               "Invalid cursor size. Skipping cursor.\n");
343
        skip_cursor = 1;
344
    }
345
346

23
    if (!skip_cursor && avpkt->size < CURSOR_OFFSET + sizeof(ctx->cursor_buf)) {
347
        skip_cursor = 1;
348
    }
349
350
    /* Slice height for all but the last slice. */
351
23
    ctx->slice_h = 16 * (ctx->aligned_height >> 4) / nslices;
352
23
    if (ctx->slice_h % 16)
353
        ctx->slice_h = FFALIGN(ctx->slice_h - 16, 16);
354
355
    /* First slice offset and remaining data. */
356
23
    sdata = src + tsize + FIC_HEADER_SIZE + 4 * nslices;
357
23
    msize = avpkt->size - nslices * 4 - tsize - FIC_HEADER_SIZE;
358
359
23
    if (msize <= ctx->aligned_width/8 * (ctx->aligned_height/8) / 8) {
360
        av_log(avctx, AV_LOG_ERROR, "Not enough frame data to decode.\n");
361
        return AVERROR_INVALIDDATA;
362
    }
363
364
    /* Allocate slice data. */
365
23
    av_fast_malloc(&ctx->slice_data, &ctx->slice_data_size,
366
                   nslices * sizeof(ctx->slice_data[0]));
367
23
    if (!ctx->slice_data_size) {
368
        av_log(avctx, AV_LOG_ERROR, "Could not allocate slice data.\n");
369
        return AVERROR(ENOMEM);
370
    }
371
23
    memset(ctx->slice_data, 0, nslices * sizeof(ctx->slice_data[0]));
372
373
115
    for (slice = 0; slice < nslices; slice++) {
374
92
        unsigned slice_off = AV_RB32(src + tsize + FIC_HEADER_SIZE + slice * 4);
375
        unsigned slice_size;
376
92
        int y_off   = ctx->slice_h * slice;
377
92
        int slice_h = ctx->slice_h;
378
379
        /*
380
         * Either read the slice size, or consume all data left.
381
         * Also, special case the last slight height.
382
         */
383
92
        if (slice == nslices - 1) {
384
23
            slice_size   = msize;
385
23
            slice_h      = FFALIGN(avctx->height - ctx->slice_h * (nslices - 1), 16);
386
        } else {
387
69
            slice_size = AV_RB32(src + tsize + FIC_HEADER_SIZE + slice * 4 + 4);
388
69
            if (slice_size < slice_off)
389
                return AVERROR_INVALIDDATA;
390
        }
391
392

92
        if (slice_size < slice_off || slice_size > msize)
393
4
            continue;
394
395
88
        slice_size -= slice_off;
396
397
88
        ctx->slice_data[slice].src      = sdata + slice_off;
398
88
        ctx->slice_data[slice].src_size = slice_size;
399
88
        ctx->slice_data[slice].slice_h  = slice_h;
400
88
        ctx->slice_data[slice].y_off    = y_off;
401
    }
402
403
23
    if ((ret = avctx->execute(avctx, fic_decode_slice, ctx->slice_data,
404
                              NULL, nslices, sizeof(ctx->slice_data[0]))) < 0)
405
        return ret;
406
407
23
    ctx->frame->key_frame = 1;
408
23
    ctx->frame->pict_type = AV_PICTURE_TYPE_I;
409
35
    for (slice = 0; slice < nslices; slice++) {
410
32
        if (ctx->slice_data[slice].p_frame) {
411
20
            ctx->frame->key_frame = 0;
412
20
            ctx->frame->pict_type = AV_PICTURE_TYPE_P;
413
20
            break;
414
        }
415
    }
416
23
    av_frame_free(&ctx->final_frame);
417
23
    ctx->final_frame = av_frame_clone(ctx->frame);
418
23
    if (!ctx->final_frame) {
419
        av_log(avctx, AV_LOG_ERROR, "Could not clone frame buffer.\n");
420
        return AVERROR(ENOMEM);
421
    }
422
423
    /* Make sure we use a user-supplied buffer. */
424
23
    if ((ret = ff_reget_buffer(avctx, ctx->final_frame, 0)) < 0) {
425
        av_log(avctx, AV_LOG_ERROR, "Could not make frame writable.\n");
426
        return ret;
427
    }
428
429
    /* Draw cursor. */
430
23
    if (!skip_cursor) {
431
23
        memcpy(ctx->cursor_buf, src + CURSOR_OFFSET, sizeof(ctx->cursor_buf));
432
23
        fic_draw_cursor(avctx, cur_x, cur_y);
433
    }
434
435
skip:
436
121
    *got_frame = 1;
437
121
    if ((ret = av_frame_ref(data, ctx->final_frame)) < 0)
438
        return ret;
439
440
121
    return avpkt->size;
441
}
442
443
2
static av_cold int fic_decode_close(AVCodecContext *avctx)
444
{
445
2
    FICContext *ctx = avctx->priv_data;
446
447
2
    av_freep(&ctx->slice_data);
448
2
    av_frame_free(&ctx->final_frame);
449
2
    av_frame_free(&ctx->frame);
450
451
2
    return 0;
452
}
453
454
2
static av_cold int fic_decode_init(AVCodecContext *avctx)
455
{
456
2
    FICContext *ctx = avctx->priv_data;
457
458
    /* Initialize various context values */
459
2
    ctx->avctx            = avctx;
460
2
    ctx->aligned_width    = FFALIGN(avctx->width,  16);
461
2
    ctx->aligned_height   = FFALIGN(avctx->height, 16);
462
463
2
    avctx->pix_fmt             = AV_PIX_FMT_YUV420P;
464
2
    avctx->bits_per_raw_sample = 8;
465
466
2
    ctx->frame = av_frame_alloc();
467
2
    if (!ctx->frame)
468
        return AVERROR(ENOMEM);
469
470
2
    return 0;
471
}
472
473
static const AVOption options[] = {
474
{ "skip_cursor", "skip the cursor", offsetof(FICContext, skip_cursor), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM },
475
{ NULL },
476
};
477
478
static const AVClass fic_decoder_class = {
479
    .class_name = "FIC decoder",
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    .item_name  = av_default_item_name,
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    .option     = options,
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    .version    = LIBAVUTIL_VERSION_INT,
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};
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AVCodec ff_fic_decoder = {
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    .name           = "fic",
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    .long_name      = NULL_IF_CONFIG_SMALL("Mirillis FIC"),
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    .type           = AVMEDIA_TYPE_VIDEO,
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    .id             = AV_CODEC_ID_FIC,
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    .priv_data_size = sizeof(FICContext),
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    .init           = fic_decode_init,
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    .decode         = fic_decode_frame,
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    .close          = fic_decode_close,
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    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS,
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    .priv_class     = &fic_decoder_class,
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};