FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/flashsv.c
Date: 2026-10-19 01:23:10
Exec Total Coverage
Lines: 199 277 71.8%
Functions: 8 8 100.0%
Branches: 97 156 62.2%
Line Branch Exec Source
1 /*
2 * Flash Screen Video decoder
3 * Copyright (C) 2004 Alex Beregszaszi
4 * Copyright (C) 2006 Benjamin Larsson
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 /**
24 * @file
25 * Flash Screen Video decoder
26 * @author Alex Beregszaszi
27 * @author Benjamin Larsson
28 * @author Daniel Verkamp
29 * @author Konstantin Shishkov
30 *
31 * A description of the bitstream format for Flash Screen Video version 1/2
32 * is part of the SWF File Format Specification (version 10), which can be
33 * downloaded from http://www.adobe.com/devnet/swf.html.
34 */
35
36 #include "config_components.h"
37
38 #include <stddef.h>
39 #include <zlib.h>
40
41 #include "libavutil/intreadwrite.h"
42 #include "libavutil/mem.h"
43 #include "avcodec.h"
44 #include "bytestream.h"
45 #include "codec_internal.h"
46 #include "decode.h"
47 #include "get_bits.h"
48 #include "zlib_wrapper.h"
49
50 typedef struct BlockInfo {
51 const uint8_t *pos;
52 int size;
53 } BlockInfo;
54
55 typedef struct FlashSVContext {
56 AVCodecContext *avctx;
57 AVFrame *frame;
58 int image_width, image_height;
59 int block_width, block_height;
60 uint8_t *tmpblock;
61 int block_size;
62 int ver;
63 const uint32_t *pal;
64 int is_keyframe;
65 const uint8_t *keyframedata;
66 AVBufferRef *keyframedata_buf;
67 uint8_t *keyframe;
68 BlockInfo *blocks;
69 int color_depth;
70 int zlibprime_curr, zlibprime_prev;
71 int diff_start, diff_height;
72 FFZStream zstream;
73 uint8_t tmp[UINT16_MAX];
74 } FlashSVContext;
75
76 4641 static int decode_hybrid(const uint8_t *sptr, const uint8_t *sptr_end, uint8_t *dptr, int dx, int dy,
77 int h, int w, int stride, const uint32_t *pal)
78 {
79 int x, y;
80 4641 const uint8_t *orig_src = sptr;
81
82
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 270759 for (y = dx + h; y > dx; y--) {
83 266118 uint8_t *dst = dptr + (y * stride) + dy * 3;
84
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 15835602 for (x = 0; x < w; x++) {
85
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 15569484 if (sptr >= sptr_end)
86 ✗ return AVERROR_INVALIDDATA;
87
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 15569484 if (*sptr & 0x80) {
88
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 12342661 if (sptr + 2 > sptr_end)
89 ✗ return AVERROR_INVALIDDATA;
90 /* 15-bit color */
91 12342661 unsigned c = AV_RB16(sptr) & ~0x8000;
92 12342661 unsigned b = c & 0x1F;
93 12342661 unsigned g = (c >> 5) & 0x1F;
94 12342661 unsigned r = c >> 10;
95 /* 000aaabb -> aaabbaaa */
96 12342661 *dst++ = (b << 3) | (b >> 2);
97 12342661 *dst++ = (g << 3) | (g >> 2);
98 12342661 *dst++ = (r << 3) | (r >> 2);
99 12342661 sptr += 2;
100 } else {
101 /* palette index */
102 3226823 uint32_t c = pal[*sptr++];
103 3226823 bytestream_put_le24(&dst, c);
104 }
105 }
106 }
107 4641 return sptr - orig_src;
108 }
109
110 17 static av_cold int flashsv_decode_end(AVCodecContext *avctx)
111 {
112 17 FlashSVContext *s = avctx->priv_data;
113
114 17 ff_inflate_end(&s->zstream);
115 /* release the frame if needed */
116 17 av_frame_free(&s->frame);
117
118 /* free the tmpblock */
119 17 av_freep(&s->tmpblock);
120
121 17 return 0;
122 }
123
124 17 static av_cold int flashsv_decode_init(AVCodecContext *avctx)
125 {
126 17 FlashSVContext *s = avctx->priv_data;
127
128 17 s->avctx = avctx;
129 17 avctx->pix_fmt = AV_PIX_FMT_BGR24;
130
131 17 s->frame = av_frame_alloc();
132
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 17 if (!s->frame) {
133 ✗ return AVERROR(ENOMEM);
134 }
135
136 17 return ff_inflate_init(&s->zstream, avctx);
137 }
138
139 4095 static int flashsv2_prime(FlashSVContext *s, const uint8_t *src, int size)
140 {
141 int zret; // Zlib return code
142 static const uint8_t zlib_header[] = { 0x78, 0x01 };
143 4095 z_stream *const zstream = &s->zstream.zstream;
144 4095 uint8_t *data = s->tmpblock;
145 unsigned remaining;
146
147
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 4095 if (!src)
148 ✗ return AVERROR_INVALIDDATA;
149
150 4095 zstream->next_in = src;
151 4095 zstream->avail_in = size;
152 4095 zstream->next_out = data;
153 4095 zstream->avail_out = s->block_size * 3;
154 4095 zret = inflate(zstream, Z_SYNC_FLUSH);
155
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 4095 if (zret != Z_OK && zret != Z_STREAM_END)
156 ✗ return AVERROR_UNKNOWN;
157 4095 remaining = s->block_size * 3 - zstream->avail_out;
158
159
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 4095 if ((zret = inflateReset(zstream)) != Z_OK) {
160 ✗ av_log(s->avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
161 ✗ return AVERROR_UNKNOWN;
162 }
163
164 /* Create input for zlib that is equivalent to encoding the output
165 * from above and decoding it again (the net result of this is that
166 * the dictionary of past decoded data is correctly primed and
167 * the adler32 checksum is correctly initialized).
168 * This is accomplished by synthetizing blocks of uncompressed data
169 * out of the output from above. See section 3.2.4 of RFC 1951. */
170 4095 zstream->next_in = zlib_header;
171 4095 zstream->avail_in = sizeof(zlib_header);
172 4095 zret = inflate(zstream, Z_SYNC_FLUSH);
173
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 4095 if (zret != Z_OK)
174 ✗ return AVERROR_UNKNOWN;
175
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 8190 while (remaining > 0) {
176 4095 unsigned block_size = FFMIN(UINT16_MAX, remaining);
177 uint8_t header[5];
178 /* Bit 0: Non-last-block, bits 1-2: BTYPE for uncompressed block */
179 4095 header[0] = 0;
180 /* Block size */
181 4095 AV_WL16(header + 1, block_size);
182 /* Block size (one's complement) */
183 4095 AV_WL16(header + 3, block_size ^ 0xFFFF);
184 4095 zstream->next_in = header;
185 4095 zstream->avail_in = sizeof(header);
186 4095 zstream->next_out = s->tmp;
187 4095 zstream->avail_out = sizeof(s->tmp);
188 4095 zret = inflate(zstream, Z_SYNC_FLUSH);
189
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 4095 if (zret != Z_OK)
190 ✗ return AVERROR_UNKNOWN;
191 4095 zstream->next_in = data;
192 4095 zstream->avail_in = block_size;
193 4095 zret = inflate(zstream, Z_SYNC_FLUSH);
194
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 4095 if (zret != Z_OK)
195 ✗ return AVERROR_UNKNOWN;
196 4095 data += block_size;
197 4095 remaining -= block_size;
198 }
199
200 4095 return 0;
201 }
202
203 9312 static int flashsv_decode_block(AVCodecContext *avctx, const AVPacket *avpkt,
204 GetBitContext *gb, int block_size,
205 int width, int height, int x_pos, int y_pos,
206 int blk_idx)
207 {
208 9312 struct FlashSVContext *s = avctx->priv_data;
209 9312 z_stream *const zstream = &s->zstream.zstream;
210 9312 uint8_t *line = s->tmpblock;
211 int k;
212 9312 int ret = inflateReset(zstream);
213
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 9312 if (ret != Z_OK) {
214 ✗ av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", ret);
215 ✗ return AVERROR_UNKNOWN;
216 }
217
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 9312 if (s->zlibprime_curr || s->zlibprime_prev) {
218 4095 ret = flashsv2_prime(s,
219 4095 s->blocks[blk_idx].pos,
220 4095 s->blocks[blk_idx].size);
221
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 4095 if (ret < 0)
222 ✗ return ret;
223 }
224 9312 zstream->next_in = avpkt->data + get_bits_count(gb) / 8;
225 9312 zstream->avail_in = block_size;
226 9312 zstream->next_out = s->tmpblock;
227 9312 zstream->avail_out = s->block_size * 3;
228 9312 ret = inflate(zstream, Z_FINISH);
229
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 9312 if (ret == Z_DATA_ERROR) {
230 ✗ av_log(avctx, AV_LOG_ERROR, "Zlib resync occurred\n");
231 ✗ inflateSync(zstream);
232 ✗ inflate(zstream, Z_FINISH);
233 }
234
235
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 9312 if (s->is_keyframe) {
236 546 s->blocks[blk_idx].pos = s->keyframedata + (get_bits_count(gb) / 8);
237 546 s->blocks[blk_idx].size = block_size;
238 }
239
240 9312 y_pos += s->diff_start;
241
242
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 9312 if (!s->color_depth) {
243 4671 int inflated = s->block_size * 3 - zstream->avail_out;
244
245
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 4671 if (inflated < width * 3 * s->diff_height) {
246 ✗ av_log(avctx, AV_LOG_ERROR, "Inflated %d bytes, but %d are needed\n",
247 ✗ inflated, width * 3 * s->diff_height);
248 ✗ return AVERROR_INVALIDDATA;
249 }
250 /* Flash Screen Video stores the image upside down, so copy
251 * lines to destination in reverse order. */
252
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 272517 for (k = 1; k <= s->diff_height; k++) {
253 267846 memcpy(s->frame->data[0] + x_pos * 3 +
254 267846 (s->image_height - y_pos - k) * s->frame->linesize[0],
255 267846 line, width * 3);
256 /* advance source pointer to next line */
257 267846 line += width * 3;
258 }
259 } else {
260 /* hybrid 15-bit/palette mode */
261 4641 ret = decode_hybrid(s->tmpblock, zstream->next_out,
262 4641 s->frame->data[0],
263 4641 s->image_height - (y_pos + 1 + s->diff_height),
264 x_pos, s->diff_height, width,
265 4641 s->frame->linesize[0], s->pal);
266
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 4641 if (ret < 0) {
267 ✗ av_log(avctx, AV_LOG_ERROR, "decode_hybrid failed\n");
268 ✗ return ret;
269 }
270 }
271 9312 return 0;
272 }
273
274 409 static int flashsv_decode_frame(AVCodecContext *avctx, AVFrame *rframe,
275 int *got_frame, AVPacket *avpkt)
276 {
277 409 int buf_size = avpkt->size;
278 409 FlashSVContext *s = avctx->priv_data;
279 int h_blocks, v_blocks, h_part, v_part, i, j, ret;
280 GetBitContext gb;
281 409 int last_blockwidth = s->block_width;
282 409 int last_blockheight= s->block_height;
283
284 /* no supplementary picture */
285
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 409 if (buf_size == 0)
286 ✗ return 0;
287
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 409 if (buf_size < 4)
288 ✗ return -1;
289
290
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 409 if ((ret = init_get_bits8(&gb, avpkt->data, buf_size)) < 0)
291 ✗ return ret;
292
293 /* start to parse the bitstream */
294 409 s->block_width = 16 * (get_bits(&gb, 4) + 1);
295 409 s->image_width = get_bits(&gb, 12);
296 409 s->block_height = 16 * (get_bits(&gb, 4) + 1);
297 409 s->image_height = get_bits(&gb, 12);
298
299
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 409 if ( last_blockwidth != s->block_width
300
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 392 || last_blockheight!= s->block_height)
301 17 av_freep(&s->blocks);
302
303
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 409 if (s->ver == 2) {
304 204 skip_bits(&gb, 6);
305
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 204 if (get_bits1(&gb)) {
306 ✗ avpriv_request_sample(avctx, "iframe");
307 ✗ return AVERROR_PATCHWELCOME;
308 }
309
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 204 if (get_bits1(&gb)) {
310 ✗ avpriv_request_sample(avctx, "Custom palette");
311 ✗ return AVERROR_PATCHWELCOME;
312 }
313 }
314
315 /* calculate number of blocks and size of border (partial) blocks */
316 409 h_blocks = s->image_width / s->block_width;
317 409 h_part = s->image_width % s->block_width;
318 409 v_blocks = s->image_height / s->block_height;
319 409 v_part = s->image_height % s->block_height;
320
321
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 409 if (h_blocks * v_blocks * 16 > get_bits_left(&gb))
322 ✗ return AVERROR_INVALIDDATA;
323
324 /* the block size could change between frames, make sure the buffer
325 * is large enough, if not, get a larger one */
326
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 409 if (s->block_size < s->block_width * s->block_height) {
327 17 int tmpblock_size = 3 * s->block_width * s->block_height, err;
328
329
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 17 if ((err = av_reallocp(&s->tmpblock, tmpblock_size)) < 0) {
330 ✗ s->block_size = 0;
331 ✗ av_log(avctx, AV_LOG_ERROR,
332 "Cannot allocate decompression buffer.\n");
333 ✗ return err;
334 }
335 }
336 409 s->block_size = s->block_width * s->block_height;
337
338 /* initialize the image size once */
339
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 409 if (avctx->width == 0 && avctx->height == 0) {
340
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 9 if ((ret = ff_set_dimensions(avctx, s->image_width, s->image_height)) < 0)
341 ✗ return ret;
342 }
343
344 /* check for changes of image width and image height */
345
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 409 if (avctx->width != s->image_width || avctx->height != s->image_height) {
346 ✗ av_log(avctx, AV_LOG_ERROR,
347 "Frame width or height differs from first frame!\n");
348 ✗ av_log(avctx, AV_LOG_ERROR, "fh = %d, fv %d vs ch = %d, cv = %d\n",
349 avctx->height, avctx->width, s->image_height, s->image_width);
350 ✗ return AVERROR_INVALIDDATA;
351 }
352
353 /* we care for keyframes only in Screen Video v2 */
354
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 409 s->is_keyframe = (avpkt->flags & AV_PKT_FLAG_KEY) && (s->ver == 2);
355
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 409 if (s->is_keyframe) {
356 24 int err = av_buffer_replace(&s->keyframedata_buf, avpkt->buf);
357
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 24 if (err < 0)
358 ✗ return err;
359 24 s->keyframedata = avpkt->data;
360
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 24 if (s->blocks)
361 16 memset(s->blocks, 0, (v_blocks + !!v_part) * (h_blocks + !!h_part) *
362 sizeof(s->blocks[0]));
363 }
364
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 409 if(s->ver == 2 && !s->blocks)
365 8 s->blocks = av_mallocz((v_blocks + !!v_part) * (h_blocks + !!h_part) *
366 sizeof(s->blocks[0]));
367
368 ff_dlog(avctx, "image: %dx%d block: %dx%d num: %dx%d part: %dx%d\n",
369 s->image_width, s->image_height, s->block_width, s->block_height,
370 h_blocks, v_blocks, h_part, v_part);
371
372
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 409 if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0)
373 ✗ return ret;
374
375 /* loop over all block columns */
376
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 2046 for (j = 0; j < v_blocks + (v_part ? 1 : 0); j++) {
377
378 1637 int y_pos = j * s->block_height; // vertical position in frame
379
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 1637 int cur_blk_height = (j < v_blocks) ? s->block_height : v_part;
380
381 /* loop over all block rows */
382
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 10949 for (i = 0; i < h_blocks + (h_part ? 1 : 0); i++) {
383 9312 int x_pos = i * s->block_width; // horizontal position in frame
384
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 9312 int cur_blk_width = (i < h_blocks) ? s->block_width : h_part;
385 9312 int has_diff = 0;
386
387 /* get the size of the compressed zlib chunk */
388 9312 int size = get_bits(&gb, 16);
389
390 9312 s->color_depth = 0;
391 9312 s->zlibprime_curr = 0;
392 9312 s->zlibprime_prev = 0;
393 9312 s->diff_start = 0;
394 9312 s->diff_height = cur_blk_height;
395
396
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 9312 if (8 * size > get_bits_left(&gb)) {
397 ✗ av_frame_unref(s->frame);
398 ✗ return AVERROR_INVALIDDATA;
399 }
400
401
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 9312 if (s->ver == 2 && size) {
402 4641 skip_bits(&gb, 3);
403 4641 s->color_depth = get_bits(&gb, 2);
404 4641 has_diff = get_bits1(&gb);
405 4641 s->zlibprime_curr = get_bits1(&gb);
406 4641 s->zlibprime_prev = get_bits1(&gb);
407
408
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 4641 if (s->color_depth != 0 && s->color_depth != 2) {
409 ✗ av_log(avctx, AV_LOG_ERROR,
410 "%dx%d invalid color depth %d\n",
411 i, j, s->color_depth);
412 ✗ return AVERROR_INVALIDDATA;
413 }
414
415
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 4641 if (has_diff) {
416 ✗ if (size < 3) {
417 ✗ av_log(avctx, AV_LOG_ERROR, "size too small for diff\n");
418 ✗ return AVERROR_INVALIDDATA;
419 }
420 ✗ if (!s->keyframe) {
421 ✗ av_log(avctx, AV_LOG_ERROR,
422 "Inter frame without keyframe\n");
423 ✗ return AVERROR_INVALIDDATA;
424 }
425 ✗ s->diff_start = get_bits(&gb, 8);
426 ✗ s->diff_height = get_bits(&gb, 8);
427 ✗ if (s->diff_start + s->diff_height > cur_blk_height) {
428 ✗ av_log(avctx, AV_LOG_ERROR,
429 "Block parameters invalid: %d + %d > %d\n",
430 s->diff_start, s->diff_height, cur_blk_height);
431 ✗ return AVERROR_INVALIDDATA;
432 }
433 ✗ av_log(avctx, AV_LOG_DEBUG,
434 "%dx%d diff start %d height %d\n",
435 i, j, s->diff_start, s->diff_height);
436 ✗ size -= 2;
437 }
438
439
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 4641 if (s->zlibprime_prev)
440 4095 av_log(avctx, AV_LOG_DEBUG, "%dx%d zlibprime_prev\n", i, j);
441
442
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 4641 if (s->zlibprime_curr) {
443 ✗ int col = get_bits(&gb, 8);
444 ✗ int row = get_bits(&gb, 8);
445 ✗ av_log(avctx, AV_LOG_DEBUG, "%dx%d zlibprime_curr %dx%d\n",
446 i, j, col, row);
447 ✗ if (size < 3) {
448 ✗ av_log(avctx, AV_LOG_ERROR, "size too small for zlibprime_curr\n");
449 ✗ return AVERROR_INVALIDDATA;
450 }
451 ✗ size -= 2;
452 ✗ avpriv_request_sample(avctx, "zlibprime_curr");
453 ✗ return AVERROR_PATCHWELCOME;
454 }
455
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 4641 if (!s->blocks && (s->zlibprime_curr || s->zlibprime_prev)) {
456 ✗ av_log(avctx, AV_LOG_ERROR,
457 "no data available for zlib priming\n");
458 ✗ return AVERROR_INVALIDDATA;
459 }
460 4641 size--; // account for flags byte
461 }
462
463
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 9312 if (has_diff) {
464 int k;
465 ✗ int off = (s->image_height - y_pos - 1) * s->frame->linesize[0];
466
467 ✗ for (k = 0; k < cur_blk_height; k++) {
468 ✗ int x = off - k * s->frame->linesize[0] + x_pos * 3;
469 ✗ memcpy(s->frame->data[0] + x, s->keyframe + x,
470 ✗ cur_blk_width * 3);
471 }
472 }
473
474 /* skip unchanged blocks, which have size 0 */
475
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 9312 if (size) {
476
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 9312 if (flashsv_decode_block(avctx, avpkt, &gb, size,
477 cur_blk_width, cur_blk_height,
478 x_pos, y_pos,
479 9312 i + j * (h_blocks + !!h_part)))
480 ✗ av_log(avctx, AV_LOG_ERROR,
481 "error in decompression of block %dx%d\n", i, j);
482 9312 skip_bits_long(&gb, 8 * size);
483 }
484 }
485 }
486
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 409 if (s->is_keyframe && s->ver == 2) {
487
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 24 if (!s->keyframe) {
488 8 s->keyframe = av_malloc(s->frame->linesize[0] * avctx->height);
489
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 8 if (!s->keyframe) {
490 ✗ av_log(avctx, AV_LOG_ERROR, "Cannot allocate image data\n");
491 ✗ return AVERROR(ENOMEM);
492 }
493 }
494 24 memcpy(s->keyframe, s->frame->data[0],
495 24 s->frame->linesize[0] * avctx->height);
496 }
497
498
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 409 if ((ret = av_frame_ref(rframe, s->frame)) < 0)
499 ✗ return ret;
500
501 409 *got_frame = 1;
502
503
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 409 if ((get_bits_count(&gb) / 8) != buf_size)
504 ✗ av_log(avctx, AV_LOG_ERROR, "buffer not fully consumed (%d != %d)\n",
505 ✗ buf_size, (get_bits_count(&gb) / 8));
506
507 /* report that the buffer was completely consumed */
508 409 return buf_size;
509 }
510
511 #if CONFIG_FLASHSV_DECODER
512 const FFCodec ff_flashsv_decoder = {
513 .p.name = "flashsv",
514 CODEC_LONG_NAME("Flash Screen Video v1"),
515 .p.type = AVMEDIA_TYPE_VIDEO,
516 .p.id = AV_CODEC_ID_FLASHSV,
517 .priv_data_size = sizeof(FlashSVContext),
518 .init = flashsv_decode_init,
519 .close = flashsv_decode_end,
520 FF_CODEC_DECODE_CB(flashsv_decode_frame),
521 .p.capabilities = AV_CODEC_CAP_DR1,
522 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
523 };
524 #endif /* CONFIG_FLASHSV_DECODER */
525
526 #if CONFIG_FLASHSV2_DECODER
527 static const uint32_t ff_flashsv2_default_palette[128] = {
528 0x000000, 0x333333, 0x666666, 0x999999, 0xCCCCCC, 0xFFFFFF,
529 0x330000, 0x660000, 0x990000, 0xCC0000, 0xFF0000, 0x003300,
530 0x006600, 0x009900, 0x00CC00, 0x00FF00, 0x000033, 0x000066,
531 0x000099, 0x0000CC, 0x0000FF, 0x333300, 0x666600, 0x999900,
532 0xCCCC00, 0xFFFF00, 0x003333, 0x006666, 0x009999, 0x00CCCC,
533 0x00FFFF, 0x330033, 0x660066, 0x990099, 0xCC00CC, 0xFF00FF,
534 0xFFFF33, 0xFFFF66, 0xFFFF99, 0xFFFFCC, 0xFF33FF, 0xFF66FF,
535 0xFF99FF, 0xFFCCFF, 0x33FFFF, 0x66FFFF, 0x99FFFF, 0xCCFFFF,
536 0xCCCC33, 0xCCCC66, 0xCCCC99, 0xCCCCFF, 0xCC33CC, 0xCC66CC,
537 0xCC99CC, 0xCCFFCC, 0x33CCCC, 0x66CCCC, 0x99CCCC, 0xFFCCCC,
538 0x999933, 0x999966, 0x9999CC, 0x9999FF, 0x993399, 0x996699,
539 0x99CC99, 0x99FF99, 0x339999, 0x669999, 0xCC9999, 0xFF9999,
540 0x666633, 0x666699, 0x6666CC, 0x6666FF, 0x663366, 0x669966,
541 0x66CC66, 0x66FF66, 0x336666, 0x996666, 0xCC6666, 0xFF6666,
542 0x333366, 0x333399, 0x3333CC, 0x3333FF, 0x336633, 0x339933,
543 0x33CC33, 0x33FF33, 0x663333, 0x993333, 0xCC3333, 0xFF3333,
544 0x003366, 0x336600, 0x660033, 0x006633, 0x330066, 0x663300,
545 0x336699, 0x669933, 0x993366, 0x339966, 0x663399, 0x996633,
546 0x6699CC, 0x99CC66, 0xCC6699, 0x66CC99, 0x9966CC, 0xCC9966,
547 0x99CCFF, 0xCCFF99, 0xFF99CC, 0x99FFCC, 0xCC99FF, 0xFFCC99,
548 0x111111, 0x222222, 0x444444, 0x555555, 0xAAAAAA, 0xBBBBBB,
549 0xDDDDDD, 0xEEEEEE
550 };
551
552 8 static av_cold int flashsv2_decode_init(AVCodecContext *avctx)
553 {
554 8 FlashSVContext *s = avctx->priv_data;
555 int ret;
556
557 8 ret = flashsv_decode_init(avctx);
558
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 8 if (ret < 0)
559 ✗ return ret;
560 8 s->pal = ff_flashsv2_default_palette;
561 8 s->ver = 2;
562
563 8 return 0;
564 }
565
566 8 static av_cold int flashsv2_decode_end(AVCodecContext *avctx)
567 {
568 8 FlashSVContext *s = avctx->priv_data;
569
570 8 av_buffer_unref(&s->keyframedata_buf);
571 8 s->keyframedata = NULL;
572 8 av_freep(&s->blocks);
573 8 av_freep(&s->keyframe);
574 8 flashsv_decode_end(avctx);
575
576 8 return 0;
577 }
578
579 const FFCodec ff_flashsv2_decoder = {
580 .p.name = "flashsv2",
581 CODEC_LONG_NAME("Flash Screen Video v2"),
582 .p.type = AVMEDIA_TYPE_VIDEO,
583 .p.id = AV_CODEC_ID_FLASHSV2,
584 .priv_data_size = sizeof(FlashSVContext),
585 .init = flashsv2_decode_init,
586 .close = flashsv2_decode_end,
587 FF_CODEC_DECODE_CB(flashsv_decode_frame),
588 .p.capabilities = AV_CODEC_CAP_DR1,
589 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
590 };
591 #endif /* CONFIG_FLASHSV2_DECODER */
592