GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/hqx.c Lines: 199 291 68.4 %
Date: 2021-04-18 10:33:33 Branches: 82 143 57.3 %

Line Branch Exec Source
1
/*
2
 * Canopus HQX decoder
3
 *
4
 * This file is part of FFmpeg.
5
 *
6
 * FFmpeg is free software; you can redistribute it and/or
7
 * modify it under the terms of the GNU Lesser General Public
8
 * License as published by the Free Software Foundation; either
9
 * version 2.1 of the License, or (at your option) any later version.
10
 *
11
 * FFmpeg is distributed in the hope that it will be useful,
12
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14
 * Lesser General Public License for more details.
15
 *
16
 * You should have received a copy of the GNU Lesser General Public
17
 * License along with FFmpeg; if not, write to the Free Software
18
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19
 */
20
21
#include <inttypes.h>
22
23
#include "libavutil/imgutils.h"
24
#include "libavutil/intreadwrite.h"
25
26
#include "avcodec.h"
27
#include "canopus.h"
28
#include "get_bits.h"
29
#include "internal.h"
30
#include "thread.h"
31
32
#include "hqx.h"
33
#include "hqxdsp.h"
34
35
/* HQX has four modes - 422, 444, 422alpha and 444alpha - all 12-bit */
36
enum HQXFormat {
37
    HQX_422 = 0,
38
    HQX_444,
39
    HQX_422A,
40
    HQX_444A,
41
};
42
43
#define HQX_HEADER_SIZE 59
44
45
/* macroblock selects a group of 4 possible quants and
46
 * a block can use any of those four quantisers
47
 * one column is powers of 2, the other one is powers of 2 * 3,
48
 * then there is the special one, powers of 2 * 5 */
49
static const int hqx_quants[16][4] = {
50
    {  0x1,   0x2,   0x4,   0x8 }, {  0x1,  0x3,   0x6,   0xC },
51
    {  0x2,   0x4,   0x8,  0x10 }, {  0x3,  0x6,   0xC,  0x18 },
52
    {  0x4,   0x8,  0x10,  0x20 }, {  0x6,  0xC,  0x18,  0x30 },
53
    {  0x8,  0x10,  0x20,  0x40 },
54
                      { 0xA, 0x14, 0x28, 0x50 },
55
                                   {  0xC, 0x18,  0x30,  0x60 },
56
    { 0x10,  0x20,  0x40,  0x80 }, { 0x18, 0x30,  0x60,  0xC0 },
57
    { 0x20,  0x40,  0x80, 0x100 }, { 0x30, 0x60,  0xC0, 0x180 },
58
    { 0x40,  0x80, 0x100, 0x200 }, { 0x60, 0xC0, 0x180, 0x300 },
59
    { 0x80, 0x100, 0x200, 0x400 }
60
};
61
62
static const uint8_t hqx_quant_luma[64] = {
63
    16,  16,  16,  19,  19,  19,  42,  44,
64
    16,  16,  19,  19,  19,  38,  43,  45,
65
    16,  19,  19,  19,  40,  41,  45,  48,
66
    19,  19,  19,  40,  41,  42,  46,  49,
67
    19,  19,  40,  41,  42,  43,  48, 101,
68
    19,  38,  41,  42,  43,  44,  98, 104,
69
    42,  43,  45,  46,  48,  98, 109, 116,
70
    44,  45,  48,  49, 101, 104, 116, 123,
71
};
72
73
static const uint8_t hqx_quant_chroma[64] = {
74
    16,  16,  19,  25,  26,  26,  42,  44,
75
    16,  19,  25,  25,  26,  38,  43,  91,
76
    19,  25,  26,  27,  40,  41,  91,  96,
77
    25,  25,  27,  40,  41,  84,  93, 197,
78
    26,  26,  40,  41,  84,  86, 191, 203,
79
    26,  38,  41,  84,  86, 177, 197, 209,
80
    42,  43,  91,  93, 191, 197, 219, 232,
81
    44,  91,  96, 197, 203, 209, 232, 246,
82
};
83
84
110880
static inline void put_blocks(HQXContext *ctx, int plane,
85
                              int x, int y, int ilace,
86
                              int16_t *block0, int16_t *block1,
87
                              const uint8_t *quant)
88
{
89
110880
    int fields = ilace ? 2 : 1;
90
110880
    int lsize = ctx->pic->linesize[plane];
91
110880
    uint8_t *p = ctx->pic->data[plane] + x * 2;
92
93
110880
    ctx->hqxdsp.idct_put((uint16_t *)(p + y * lsize),
94
110880
                         lsize * fields, block0, quant);
95
110880
    ctx->hqxdsp.idct_put((uint16_t *)(p + (y + (ilace ? 1 : 8)) * lsize),
96
110880
                         lsize * fields, block1, quant);
97
110880
}
98
99
2674300
static inline void hqx_get_ac(GetBitContext *gb, const HQXAC *ac,
100
                              int *run, int *lev)
101
{
102
    int val;
103
104
2674300
    val = show_bits(gb, ac->lut_bits);
105
2674300
    if (ac->lut[val].bits == -1) {
106
108610
        GetBitContext gb2 = *gb;
107
108610
        skip_bits(&gb2, ac->lut_bits);
108
108610
        val = ac->lut[val].lev + show_bits(&gb2, ac->extra_bits);
109
    }
110
2674300
    *run = ac->lut[val].run;
111
2674300
    *lev = ac->lut[val].lev;
112
2674300
    skip_bits(gb, ac->lut[val].bits);
113
2674300
}
114
115
144104
static int decode_block(GetBitContext *gb, VLC *vlc,
116
                        const int *quants, int dcb,
117
                        int16_t block[64], int *last_dc)
118
{
119
    int q, dc;
120
    int ac_idx;
121
144104
    int run, lev, pos = 1;
122
123
144104
    memset(block, 0, 64 * sizeof(*block));
124
144104
    dc = get_vlc2(gb, vlc->table, HQX_DC_VLC_BITS, 2);
125
144104
    *last_dc += dc;
126
127
144104
    block[0] = sign_extend(*last_dc << (12 - dcb), 12);
128
129
144104
    q = quants[get_bits(gb, 2)];
130
144104
    if (q >= 128)
131
        ac_idx = HQX_AC_Q128;
132
144104
    else if (q >= 64)
133
        ac_idx = HQX_AC_Q64;
134
144104
    else if (q >= 32)
135
        ac_idx = HQX_AC_Q32;
136
144104
    else if (q >= 16)
137
        ac_idx = HQX_AC_Q16;
138
144104
    else if (q >= 8)
139
14
        ac_idx = HQX_AC_Q8;
140
    else
141
144090
        ac_idx = HQX_AC_Q0;
142
143
    do {
144
2674300
        hqx_get_ac(gb, &ff_hqx_ac[ac_idx], &run, &lev);
145
2674300
        pos += run;
146
2674300
        if (pos >= 64)
147
140780
            break;
148
2533520
        block[ff_zigzag_direct[pos++]] = lev * q;
149
2533520
    } while (pos < 64);
150
151
144104
    return 0;
152
}
153
154
3240
static int hqx_decode_422(HQXContext *ctx, int slice_no, int x, int y)
155
{
156
3240
    HQXSlice *slice = &ctx->slice[slice_no];
157
3240
    GetBitContext *gb = &slice->gb;
158
    const int *quants;
159
    int flag;
160
    int last_dc;
161
    int i, ret;
162
163
3240
    if (ctx->interlaced)
164
3240
        flag = get_bits1(gb);
165
    else
166
        flag = 0;
167
168
3240
    quants = hqx_quants[get_bits(gb, 4)];
169
170
29160
    for (i = 0; i < 8; i++) {
171
25920
        int vlc_index = ctx->dcb - 9;
172

25920
        if (i == 0 || i == 4 || i == 6)
173
9720
            last_dc = 0;
174
25920
        ret = decode_block(gb, &ctx->dc_vlc[vlc_index], quants,
175
25920
                           ctx->dcb, slice->block[i], &last_dc);
176
25920
        if (ret < 0)
177
            return ret;
178
    }
179
180
3240
    put_blocks(ctx, 0, x,      y, flag, slice->block[0], slice->block[2], hqx_quant_luma);
181
3240
    put_blocks(ctx, 0, x + 8,  y, flag, slice->block[1], slice->block[3], hqx_quant_luma);
182
3240
    put_blocks(ctx, 2, x >> 1, y, flag, slice->block[4], slice->block[5], hqx_quant_chroma);
183
3240
    put_blocks(ctx, 1, x >> 1, y, flag, slice->block[6], slice->block[7], hqx_quant_chroma);
184
185
3240
    return 0;
186
}
187
188
16320
static int hqx_decode_422a(HQXContext *ctx, int slice_no, int x, int y)
189
{
190
16320
    HQXSlice *slice = &ctx->slice[slice_no];
191
16320
    GetBitContext *gb = &slice->gb;
192
    const int *quants;
193
16320
    int flag = 0;
194
    int last_dc;
195
    int i, ret;
196
    int cbp;
197
198
16320
    cbp = get_vlc2(gb, ctx->cbp_vlc.table, HQX_CBP_VLC_BITS, 1);
199
200
212160
    for (i = 0; i < 12; i++)
201
195840
        memset(slice->block[i], 0, sizeof(**slice->block) * 64);
202
212160
    for (i = 0; i < 12; i++)
203
195840
        slice->block[i][0] = -0x800;
204
16320
    if (cbp) {
205
9986
        if (ctx->interlaced)
206
9986
            flag = get_bits1(gb);
207
208
9986
        quants = hqx_quants[get_bits(gb, 4)];
209
210
9986
        cbp |= cbp << 4; // alpha CBP
211
9986
        if (cbp & 0x3)   // chroma CBP - top
212
9896
            cbp |= 0x500;
213
9986
        if (cbp & 0xC)   // chroma CBP - bottom
214
9878
            cbp |= 0xA00;
215
129818
        for (i = 0; i < 12; i++) {
216


119832
            if (i == 0 || i == 4 || i == 8 || i == 10)
217
39944
                last_dc = 0;
218
119832
            if (cbp & (1 << i)) {
219
118184
                int vlc_index = ctx->dcb - 9;
220
118184
                ret = decode_block(gb, &ctx->dc_vlc[vlc_index], quants,
221
118184
                                   ctx->dcb, slice->block[i], &last_dc);
222
118184
                if (ret < 0)
223
                    return ret;
224
            }
225
        }
226
    }
227
228
16320
    put_blocks(ctx, 3, x,      y, flag, slice->block[ 0], slice->block[ 2], hqx_quant_luma);
229
16320
    put_blocks(ctx, 3, x + 8,  y, flag, slice->block[ 1], slice->block[ 3], hqx_quant_luma);
230
16320
    put_blocks(ctx, 0, x,      y, flag, slice->block[ 4], slice->block[ 6], hqx_quant_luma);
231
16320
    put_blocks(ctx, 0, x + 8,  y, flag, slice->block[ 5], slice->block[ 7], hqx_quant_luma);
232
16320
    put_blocks(ctx, 2, x >> 1, y, flag, slice->block[ 8], slice->block[ 9], hqx_quant_chroma);
233
16320
    put_blocks(ctx, 1, x >> 1, y, flag, slice->block[10], slice->block[11], hqx_quant_chroma);
234
235
16320
    return 0;
236
}
237
238
static int hqx_decode_444(HQXContext *ctx, int slice_no, int x, int y)
239
{
240
    HQXSlice *slice = &ctx->slice[slice_no];
241
    GetBitContext *gb = &slice->gb;
242
    const int *quants;
243
    int flag;
244
    int last_dc;
245
    int i, ret;
246
247
    if (ctx->interlaced)
248
        flag = get_bits1(gb);
249
    else
250
        flag = 0;
251
252
    quants = hqx_quants[get_bits(gb, 4)];
253
254
    for (i = 0; i < 12; i++) {
255
        int vlc_index = ctx->dcb - 9;
256
        if (i == 0 || i == 4 || i == 8)
257
            last_dc = 0;
258
        ret = decode_block(gb, &ctx->dc_vlc[vlc_index], quants,
259
                           ctx->dcb, slice->block[i], &last_dc);
260
        if (ret < 0)
261
            return ret;
262
    }
263
264
    put_blocks(ctx, 0, x,     y, flag, slice->block[0], slice->block[ 2], hqx_quant_luma);
265
    put_blocks(ctx, 0, x + 8, y, flag, slice->block[1], slice->block[ 3], hqx_quant_luma);
266
    put_blocks(ctx, 2, x,     y, flag, slice->block[4], slice->block[ 6], hqx_quant_chroma);
267
    put_blocks(ctx, 2, x + 8, y, flag, slice->block[5], slice->block[ 7], hqx_quant_chroma);
268
    put_blocks(ctx, 1, x,     y, flag, slice->block[8], slice->block[10], hqx_quant_chroma);
269
    put_blocks(ctx, 1, x + 8, y, flag, slice->block[9], slice->block[11], hqx_quant_chroma);
270
271
    return 0;
272
}
273
274
static int hqx_decode_444a(HQXContext *ctx, int slice_no, int x, int y)
275
{
276
    HQXSlice *slice = &ctx->slice[slice_no];
277
    GetBitContext *gb = &slice->gb;
278
    const int *quants;
279
    int flag = 0;
280
    int last_dc;
281
    int i, ret;
282
    int cbp;
283
284
    cbp = get_vlc2(gb, ctx->cbp_vlc.table, HQX_CBP_VLC_BITS, 1);
285
286
    for (i = 0; i < 16; i++)
287
        memset(slice->block[i], 0, sizeof(**slice->block) * 64);
288
    for (i = 0; i < 16; i++)
289
        slice->block[i][0] = -0x800;
290
    if (cbp) {
291
        if (ctx->interlaced)
292
            flag = get_bits1(gb);
293
294
        quants = hqx_quants[get_bits(gb, 4)];
295
296
        cbp |= cbp << 4; // alpha CBP
297
        cbp |= cbp << 8; // chroma CBP
298
        for (i = 0; i < 16; i++) {
299
            if (i == 0 || i == 4 || i == 8 || i == 12)
300
                last_dc = 0;
301
            if (cbp & (1 << i)) {
302
                int vlc_index = ctx->dcb - 9;
303
                ret = decode_block(gb, &ctx->dc_vlc[vlc_index], quants,
304
                                   ctx->dcb, slice->block[i], &last_dc);
305
                if (ret < 0)
306
                    return ret;
307
            }
308
        }
309
    }
310
311
    put_blocks(ctx, 3, x,     y, flag, slice->block[ 0], slice->block[ 2], hqx_quant_luma);
312
    put_blocks(ctx, 3, x + 8, y, flag, slice->block[ 1], slice->block[ 3], hqx_quant_luma);
313
    put_blocks(ctx, 0, x,     y, flag, slice->block[ 4], slice->block[ 6], hqx_quant_luma);
314
    put_blocks(ctx, 0, x + 8, y, flag, slice->block[ 5], slice->block[ 7], hqx_quant_luma);
315
    put_blocks(ctx, 2, x,     y, flag, slice->block[ 8], slice->block[10], hqx_quant_chroma);
316
    put_blocks(ctx, 2, x + 8, y, flag, slice->block[ 9], slice->block[11], hqx_quant_chroma);
317
    put_blocks(ctx, 1, x,     y, flag, slice->block[12], slice->block[14], hqx_quant_chroma);
318
    put_blocks(ctx, 1, x + 8, y, flag, slice->block[13], slice->block[15], hqx_quant_chroma);
319
320
    return 0;
321
}
322
323
static const int shuffle_16[16] = {
324
    0, 5, 11, 14, 2, 7, 9, 13, 1, 4, 10, 15, 3, 6, 8, 12
325
};
326
327
64
static int decode_slice(HQXContext *ctx, int slice_no)
328
{
329
64
    int mb_w = (ctx->width  + 15) >> 4;
330
64
    int mb_h = (ctx->height + 15) >> 4;
331
64
    int grp_w = (mb_w + 4) / 5;
332
64
    int grp_h = (mb_h + 4) / 5;
333
64
    int grp_h_edge = grp_w * (mb_w / grp_w);
334
64
    int grp_v_edge = grp_h * (mb_h / grp_h);
335
64
    int grp_v_rest = mb_w - grp_h_edge;
336
64
    int grp_h_rest = mb_h - grp_v_edge;
337
64
    int num_mbs = mb_w * mb_h;
338
64
    int num_tiles = (num_mbs + 479) / 480;
339
64
    int std_tile_blocks = num_mbs / (16 * num_tiles);
340
64
    int g_tile = slice_no * num_tiles;
341
    int blk_addr, loc_addr, mb_x, mb_y, pos, loc_row, i;
342
    int tile_blocks, tile_limit, tile_no;
343
344
736
    for (tile_no = 0; tile_no < num_tiles; tile_no++, g_tile++) {
345
672
        tile_blocks = std_tile_blocks;
346
672
        tile_limit = -1;
347
672
        if (g_tile < num_mbs - std_tile_blocks * 16 * num_tiles) {
348
40
            tile_limit = num_mbs / (16 * num_tiles);
349
40
            tile_blocks++;
350
        }
351
20232
        for (i = 0; i < tile_blocks; i++) {
352
19560
            if (i == tile_limit)
353
40
                blk_addr = g_tile + 16 * num_tiles * i;
354
            else
355
19520
                blk_addr = tile_no + 16 * num_tiles * i +
356
19520
                           num_tiles * shuffle_16[(i + slice_no) & 0xF];
357
19560
            loc_row  = grp_h * (blk_addr / (grp_h * mb_w));
358
19560
            loc_addr =          blk_addr % (grp_h * mb_w);
359
19560
            if (loc_row >= grp_v_edge) {
360
3240
                mb_x = grp_w * (loc_addr / (grp_h_rest * grp_w));
361
3240
                pos  =          loc_addr % (grp_h_rest * grp_w);
362
            } else {
363
16320
                mb_x = grp_w * (loc_addr / (grp_h * grp_w));
364
16320
                pos  =          loc_addr % (grp_h * grp_w);
365
            }
366
19560
            if (mb_x >= grp_h_edge) {
367
                mb_x +=            pos % grp_v_rest;
368
                mb_y  = loc_row + (pos / grp_v_rest);
369
            } else {
370
19560
                mb_x +=            pos % grp_w;
371
19560
                mb_y  = loc_row + (pos / grp_w);
372
            }
373
19560
            ctx->decode_func(ctx, slice_no, mb_x * 16, mb_y * 16);
374
        }
375
    }
376
377
64
    return 0;
378
}
379
380
64
static int decode_slice_thread(AVCodecContext *avctx, void *arg,
381
                               int slice_no, int threadnr)
382
{
383
64
    HQXContext *ctx = avctx->priv_data;
384
64
    uint32_t *slice_off = ctx->slice_off;
385
    int ret;
386
387
64
    if (slice_off[slice_no] < HQX_HEADER_SIZE ||
388
64
        slice_off[slice_no] >= slice_off[slice_no + 1] ||
389
64
        slice_off[slice_no + 1] > ctx->data_size) {
390
        av_log(avctx, AV_LOG_ERROR, "Invalid slice size %d.\n", ctx->data_size);
391
        return AVERROR_INVALIDDATA;
392
    }
393
394
64
    ret = init_get_bits8(&ctx->slice[slice_no].gb,
395
64
                         ctx->src + slice_off[slice_no],
396
64
                         slice_off[slice_no + 1] - slice_off[slice_no]);
397
64
    if (ret < 0)
398
        return ret;
399
400
64
    return decode_slice(ctx, slice_no);
401
}
402
403
4
static int hqx_decode_frame(AVCodecContext *avctx, void *data,
404
                            int *got_picture_ptr, AVPacket *avpkt)
405
{
406
4
    HQXContext *ctx = avctx->priv_data;
407
4
    ThreadFrame frame = { .f = data };
408
4
    uint8_t *src = avpkt->data;
409
    uint32_t info_tag;
410
    int data_start;
411
    int i, ret;
412
413
4
    if (avpkt->size < 4 + 4) {
414
        av_log(avctx, AV_LOG_ERROR, "Frame is too small %d.\n", avpkt->size);
415
        return AVERROR_INVALIDDATA;
416
    }
417
418
4
    info_tag    = AV_RL32(src);
419
4
    if (info_tag == MKTAG('I', 'N', 'F', 'O')) {
420
4
        uint32_t info_offset = AV_RL32(src + 4);
421

4
        if (info_offset > INT_MAX || info_offset + 8 > avpkt->size) {
422
            av_log(avctx, AV_LOG_ERROR,
423
                   "Invalid INFO header offset: 0x%08"PRIX32" is too large.\n",
424
                   info_offset);
425
            return AVERROR_INVALIDDATA;
426
        }
427
4
        ff_canopus_parse_info_tag(avctx, src + 8, info_offset);
428
429
4
        info_offset += 8;
430
4
        src         += info_offset;
431
    }
432
433
4
    data_start     = src - avpkt->data;
434
4
    ctx->data_size = avpkt->size - data_start;
435
4
    ctx->src       = src;
436
4
    ctx->pic       = data;
437
438
4
    if (ctx->data_size < HQX_HEADER_SIZE) {
439
        av_log(avctx, AV_LOG_ERROR, "Frame too small.\n");
440
        return AVERROR_INVALIDDATA;
441
    }
442
443

4
    if (src[0] != 'H' || src[1] != 'Q') {
444
        av_log(avctx, AV_LOG_ERROR, "Not an HQX frame.\n");
445
        return AVERROR_INVALIDDATA;
446
    }
447
4
    ctx->interlaced = !(src[2] & 0x80);
448
4
    ctx->format     = src[2] & 7;
449
4
    ctx->dcb        = (src[3] & 3) + 8;
450
4
    ctx->width      = AV_RB16(src + 4);
451
4
    ctx->height     = AV_RB16(src + 6);
452
72
    for (i = 0; i < 17; i++)
453
68
        ctx->slice_off[i] = AV_RB24(src + 8 + i * 3);
454
455
4
    if (ctx->dcb == 8) {
456
        av_log(avctx, AV_LOG_ERROR, "Invalid DC precision %d.\n", ctx->dcb);
457
        return AVERROR_INVALIDDATA;
458
    }
459
4
    ret = av_image_check_size(ctx->width, ctx->height, 0, avctx);
460
4
    if (ret < 0) {
461
        av_log(avctx, AV_LOG_ERROR, "Invalid stored dimensions %dx%d.\n",
462
               ctx->width, ctx->height);
463
        return AVERROR_INVALIDDATA;
464
    }
465
466
4
    avctx->coded_width         = FFALIGN(ctx->width,  16);
467
4
    avctx->coded_height        = FFALIGN(ctx->height, 16);
468
4
    avctx->width               = ctx->width;
469
4
    avctx->height              = ctx->height;
470
4
    avctx->bits_per_raw_sample = 10;
471
472
    //The minimum size is 2bit per macroblock
473
    // hqx_decode_422 & hqx_decode_444 have a unconditionally stored 4bits hqx_quants index
474
    // hqx_decode_422a & hqx_decode_444a use cbp_vlc which has a minimum length of 2 bits for its VLCs
475
    // The code rejects slices overlapping in their input data
476
4
    if (avctx->coded_width / 16 * (avctx->coded_height / 16) *
477
4
        (100 - avctx->discard_damaged_percentage) / 100 > 4LL * avpkt->size)
478
        return AVERROR_INVALIDDATA;
479
480

4
    switch (ctx->format) {
481
2
    case HQX_422:
482
2
        avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
483
2
        ctx->decode_func = hqx_decode_422;
484
2
        break;
485
    case HQX_444:
486
        avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
487
        ctx->decode_func = hqx_decode_444;
488
        break;
489
2
    case HQX_422A:
490
2
        avctx->pix_fmt = AV_PIX_FMT_YUVA422P16;
491
2
        ctx->decode_func = hqx_decode_422a;
492
2
        break;
493
    case HQX_444A:
494
        avctx->pix_fmt = AV_PIX_FMT_YUVA444P16;
495
        ctx->decode_func = hqx_decode_444a;
496
        break;
497
    default:
498
        av_log(avctx, AV_LOG_ERROR, "Invalid format: %d.\n", ctx->format);
499
        return AVERROR_INVALIDDATA;
500
    }
501
502
4
    ret = ff_thread_get_buffer(avctx, &frame, 0);
503
4
    if (ret < 0)
504
        return ret;
505
506
4
    avctx->execute2(avctx, decode_slice_thread, NULL, NULL, 16);
507
508
4
    ctx->pic->key_frame = 1;
509
4
    ctx->pic->pict_type = AV_PICTURE_TYPE_I;
510
511
4
    *got_picture_ptr = 1;
512
513
4
    return avpkt->size;
514
}
515
516
4
static av_cold int hqx_decode_close(AVCodecContext *avctx)
517
{
518
    int i;
519
4
    HQXContext *ctx = avctx->priv_data;
520
521
4
    ff_free_vlc(&ctx->cbp_vlc);
522
16
    for (i = 0; i < 3; i++) {
523
12
        ff_free_vlc(&ctx->dc_vlc[i]);
524
    }
525
526
4
    return 0;
527
}
528
529
4
static av_cold int hqx_decode_init(AVCodecContext *avctx)
530
{
531
4
    HQXContext *ctx = avctx->priv_data;
532
533
4
    ff_hqxdsp_init(&ctx->hqxdsp);
534
535
4
    return ff_hqx_init_vlcs(ctx);
536
}
537
538
AVCodec ff_hqx_decoder = {
539
    .name           = "hqx",
540
    .long_name      = NULL_IF_CONFIG_SMALL("Canopus HQX"),
541
    .type           = AVMEDIA_TYPE_VIDEO,
542
    .id             = AV_CODEC_ID_HQX,
543
    .priv_data_size = sizeof(HQXContext),
544
    .init           = hqx_decode_init,
545
    .decode         = hqx_decode_frame,
546
    .close          = hqx_decode_close,
547
    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS |
548
                      AV_CODEC_CAP_FRAME_THREADS,
549
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE |
550
                      FF_CODEC_CAP_INIT_CLEANUP,
551
};