FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/flashsv.c
Date: 2024-04-19 07:31:02
Exec Total Coverage
Lines: 195 268 72.8%
Functions: 8 8 100.0%
Branches: 94 150 62.7%
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 /* 15-bit color */
89 12342661 unsigned c = AV_RB16(sptr) & ~0x8000;
90 12342661 unsigned b = c & 0x1F;
91 12342661 unsigned g = (c >> 5) & 0x1F;
92 12342661 unsigned r = c >> 10;
93 /* 000aaabb -> aaabbaaa */
94 12342661 *dst++ = (b << 3) | (b >> 2);
95 12342661 *dst++ = (g << 3) | (g >> 2);
96 12342661 *dst++ = (r << 3) | (r >> 2);
97 12342661 sptr += 2;
98 } else {
99 /* palette index */
100 3226823 uint32_t c = pal[*sptr++];
101 3226823 bytestream_put_le24(&dst, c);
102 }
103 }
104 }
105 4641 return sptr - orig_src;
106 }
107
108 17 static av_cold int flashsv_decode_end(AVCodecContext *avctx)
109 {
110 17 FlashSVContext *s = avctx->priv_data;
111
112 17 ff_inflate_end(&s->zstream);
113 /* release the frame if needed */
114 17 av_frame_free(&s->frame);
115
116 /* free the tmpblock */
117 17 av_freep(&s->tmpblock);
118
119 17 return 0;
120 }
121
122 17 static av_cold int flashsv_decode_init(AVCodecContext *avctx)
123 {
124 17 FlashSVContext *s = avctx->priv_data;
125
126 17 s->avctx = avctx;
127 17 avctx->pix_fmt = AV_PIX_FMT_BGR24;
128
129 17 s->frame = av_frame_alloc();
130
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 17 if (!s->frame) {
131 ✗ return AVERROR(ENOMEM);
132 }
133
134 17 return ff_inflate_init(&s->zstream, avctx);
135 }
136
137 4095 static int flashsv2_prime(FlashSVContext *s, const uint8_t *src, int size)
138 {
139 int zret; // Zlib return code
140 static const uint8_t zlib_header[] = { 0x78, 0x01 };
141 4095 z_stream *const zstream = &s->zstream.zstream;
142 4095 uint8_t *data = s->tmpblock;
143 unsigned remaining;
144
145
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 4095 if (!src)
146 ✗ return AVERROR_INVALIDDATA;
147
148 4095 zstream->next_in = src;
149 4095 zstream->avail_in = size;
150 4095 zstream->next_out = data;
151 4095 zstream->avail_out = s->block_size * 3;
152 4095 zret = inflate(zstream, Z_SYNC_FLUSH);
153
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 4095 if (zret != Z_OK && zret != Z_STREAM_END)
154 ✗ return AVERROR_UNKNOWN;
155 4095 remaining = s->block_size * 3 - zstream->avail_out;
156
157
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 4095 if ((zret = inflateReset(zstream)) != Z_OK) {
158 ✗ av_log(s->avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
159 ✗ return AVERROR_UNKNOWN;
160 }
161
162 /* Create input for zlib that is equivalent to encoding the output
163 * from above and decoding it again (the net result of this is that
164 * the dictionary of past decoded data is correctly primed and
165 * the adler32 checksum is correctly initialized).
166 * This is accomplished by synthetizing blocks of uncompressed data
167 * out of the output from above. See section 3.2.4 of RFC 1951. */
168 4095 zstream->next_in = zlib_header;
169 4095 zstream->avail_in = sizeof(zlib_header);
170 4095 zret = inflate(zstream, Z_SYNC_FLUSH);
171
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 4095 if (zret != Z_OK)
172 ✗ return AVERROR_UNKNOWN;
173
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 8190 while (remaining > 0) {
174 4095 unsigned block_size = FFMIN(UINT16_MAX, remaining);
175 uint8_t header[5];
176 /* Bit 0: Non-last-block, bits 1-2: BTYPE for uncompressed block */
177 4095 header[0] = 0;
178 /* Block size */
179 4095 AV_WL16(header + 1, block_size);
180 /* Block size (one's complement) */
181 4095 AV_WL16(header + 3, block_size ^ 0xFFFF);
182 4095 zstream->next_in = header;
183 4095 zstream->avail_in = sizeof(header);
184 4095 zstream->next_out = s->tmp;
185 4095 zstream->avail_out = sizeof(s->tmp);
186 4095 zret = inflate(zstream, Z_SYNC_FLUSH);
187
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 4095 if (zret != Z_OK)
188 ✗ return AVERROR_UNKNOWN;
189 4095 zstream->next_in = data;
190 4095 zstream->avail_in = block_size;
191 4095 zret = inflate(zstream, Z_SYNC_FLUSH);
192
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 4095 if (zret != Z_OK)
193 ✗ return AVERROR_UNKNOWN;
194 4095 data += block_size;
195 4095 remaining -= block_size;
196 }
197
198 4095 return 0;
199 }
200
201 9312 static int flashsv_decode_block(AVCodecContext *avctx, const AVPacket *avpkt,
202 GetBitContext *gb, int block_size,
203 int width, int height, int x_pos, int y_pos,
204 int blk_idx)
205 {
206 9312 struct FlashSVContext *s = avctx->priv_data;
207 9312 z_stream *const zstream = &s->zstream.zstream;
208 9312 uint8_t *line = s->tmpblock;
209 int k;
210 9312 int ret = inflateReset(zstream);
211
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 9312 if (ret != Z_OK) {
212 ✗ av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", ret);
213 ✗ return AVERROR_UNKNOWN;
214 }
215
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 9312 if (s->zlibprime_curr || s->zlibprime_prev) {
216 4095 ret = flashsv2_prime(s,
217 4095 s->blocks[blk_idx].pos,
218 4095 s->blocks[blk_idx].size);
219
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 4095 if (ret < 0)
220 ✗ return ret;
221 }
222 9312 zstream->next_in = avpkt->data + get_bits_count(gb) / 8;
223 9312 zstream->avail_in = block_size;
224 9312 zstream->next_out = s->tmpblock;
225 9312 zstream->avail_out = s->block_size * 3;
226 9312 ret = inflate(zstream, Z_FINISH);
227
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 9312 if (ret == Z_DATA_ERROR) {
228 ✗ av_log(avctx, AV_LOG_ERROR, "Zlib resync occurred\n");
229 ✗ inflateSync(zstream);
230 ✗ ret = inflate(zstream, Z_FINISH);
231 }
232
233 if (ret != Z_OK && ret != Z_STREAM_END) {
234 //return -1;
235 }
236
237
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 9312 if (s->is_keyframe) {
238 546 s->blocks[blk_idx].pos = s->keyframedata + (get_bits_count(gb) / 8);
239 546 s->blocks[blk_idx].size = block_size;
240 }
241
242 9312 y_pos += s->diff_start;
243
244
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 9312 if (!s->color_depth) {
245 /* Flash Screen Video stores the image upside down, so copy
246 * lines to destination in reverse order. */
247
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 272517 for (k = 1; k <= s->diff_height; k++) {
248 267846 memcpy(s->frame->data[0] + x_pos * 3 +
249 267846 (s->image_height - y_pos - k) * s->frame->linesize[0],
250 267846 line, width * 3);
251 /* advance source pointer to next line */
252 267846 line += width * 3;
253 }
254 } else {
255 /* hybrid 15-bit/palette mode */
256 4641 ret = decode_hybrid(s->tmpblock, zstream->next_out,
257 4641 s->frame->data[0],
258 4641 s->image_height - (y_pos + 1 + s->diff_height),
259 x_pos, s->diff_height, width,
260 4641 s->frame->linesize[0], s->pal);
261
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 4641 if (ret < 0) {
262 ✗ av_log(avctx, AV_LOG_ERROR, "decode_hybrid failed\n");
263 ✗ return ret;
264 }
265 }
266 9312 skip_bits_long(gb, 8 * block_size); /* skip the consumed bits */
267 9312 return 0;
268 }
269
270 409 static int flashsv_decode_frame(AVCodecContext *avctx, AVFrame *rframe,
271 int *got_frame, AVPacket *avpkt)
272 {
273 409 int buf_size = avpkt->size;
274 409 FlashSVContext *s = avctx->priv_data;
275 int h_blocks, v_blocks, h_part, v_part, i, j, ret;
276 GetBitContext gb;
277 409 int last_blockwidth = s->block_width;
278 409 int last_blockheight= s->block_height;
279
280 /* no supplementary picture */
281
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 409 if (buf_size == 0)
282 ✗ return 0;
283
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 409 if (buf_size < 4)
284 ✗ return -1;
285
286
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 409 if ((ret = init_get_bits8(&gb, avpkt->data, buf_size)) < 0)
287 ✗ return ret;
288
289 /* start to parse the bitstream */
290 409 s->block_width = 16 * (get_bits(&gb, 4) + 1);
291 409 s->image_width = get_bits(&gb, 12);
292 409 s->block_height = 16 * (get_bits(&gb, 4) + 1);
293 409 s->image_height = get_bits(&gb, 12);
294
295
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 409 if ( last_blockwidth != s->block_width
296
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 392 || last_blockheight!= s->block_height)
297 17 av_freep(&s->blocks);
298
299
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 409 if (s->ver == 2) {
300 204 skip_bits(&gb, 6);
301
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 204 if (get_bits1(&gb)) {
302 ✗ avpriv_request_sample(avctx, "iframe");
303 ✗ return AVERROR_PATCHWELCOME;
304 }
305
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 204 if (get_bits1(&gb)) {
306 ✗ avpriv_request_sample(avctx, "Custom palette");
307 ✗ return AVERROR_PATCHWELCOME;
308 }
309 }
310
311 /* calculate number of blocks and size of border (partial) blocks */
312 409 h_blocks = s->image_width / s->block_width;
313 409 h_part = s->image_width % s->block_width;
314 409 v_blocks = s->image_height / s->block_height;
315 409 v_part = s->image_height % s->block_height;
316
317 /* the block size could change between frames, make sure the buffer
318 * is large enough, if not, get a larger one */
319
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 409 if (s->block_size < s->block_width * s->block_height) {
320 17 int tmpblock_size = 3 * s->block_width * s->block_height, err;
321
322
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 17 if ((err = av_reallocp(&s->tmpblock, tmpblock_size)) < 0) {
323 ✗ s->block_size = 0;
324 ✗ av_log(avctx, AV_LOG_ERROR,
325 "Cannot allocate decompression buffer.\n");
326 ✗ return err;
327 }
328 }
329 409 s->block_size = s->block_width * s->block_height;
330
331 /* initialize the image size once */
332
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 409 if (avctx->width == 0 && avctx->height == 0) {
333
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 9 if ((ret = ff_set_dimensions(avctx, s->image_width, s->image_height)) < 0)
334 ✗ return ret;
335 }
336
337 /* check for changes of image width and image height */
338
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 409 if (avctx->width != s->image_width || avctx->height != s->image_height) {
339 ✗ av_log(avctx, AV_LOG_ERROR,
340 "Frame width or height differs from first frame!\n");
341 ✗ av_log(avctx, AV_LOG_ERROR, "fh = %d, fv %d vs ch = %d, cv = %d\n",
342 avctx->height, avctx->width, s->image_height, s->image_width);
343 ✗ return AVERROR_INVALIDDATA;
344 }
345
346 /* we care for keyframes only in Screen Video v2 */
347
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 409 s->is_keyframe = (avpkt->flags & AV_PKT_FLAG_KEY) && (s->ver == 2);
348
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 409 if (s->is_keyframe) {
349 24 int err = av_buffer_replace(&s->keyframedata_buf, avpkt->buf);
350
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 24 if (err < 0)
351 ✗ return err;
352 24 s->keyframedata = avpkt->data;
353
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 24 if (s->blocks)
354 16 memset(s->blocks, 0, (v_blocks + !!v_part) * (h_blocks + !!h_part) *
355 sizeof(s->blocks[0]));
356 }
357
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 409 if(s->ver == 2 && !s->blocks)
358 8 s->blocks = av_mallocz((v_blocks + !!v_part) * (h_blocks + !!h_part) *
359 sizeof(s->blocks[0]));
360
361 ff_dlog(avctx, "image: %dx%d block: %dx%d num: %dx%d part: %dx%d\n",
362 s->image_width, s->image_height, s->block_width, s->block_height,
363 h_blocks, v_blocks, h_part, v_part);
364
365
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 409 if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0)
366 ✗ return ret;
367
368 /* loop over all block columns */
369
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 2046 for (j = 0; j < v_blocks + (v_part ? 1 : 0); j++) {
370
371 1637 int y_pos = j * s->block_height; // vertical position in frame
372
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 1637 int cur_blk_height = (j < v_blocks) ? s->block_height : v_part;
373
374 /* loop over all block rows */
375
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 10949 for (i = 0; i < h_blocks + (h_part ? 1 : 0); i++) {
376 9312 int x_pos = i * s->block_width; // horizontal position in frame
377
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 9312 int cur_blk_width = (i < h_blocks) ? s->block_width : h_part;
378 9312 int has_diff = 0;
379
380 /* get the size of the compressed zlib chunk */
381 9312 int size = get_bits(&gb, 16);
382
383 9312 s->color_depth = 0;
384 9312 s->zlibprime_curr = 0;
385 9312 s->zlibprime_prev = 0;
386 9312 s->diff_start = 0;
387 9312 s->diff_height = cur_blk_height;
388
389
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 9312 if (8 * size > get_bits_left(&gb)) {
390 ✗ av_frame_unref(s->frame);
391 ✗ return AVERROR_INVALIDDATA;
392 }
393
394
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 9312 if (s->ver == 2 && size) {
395 4641 skip_bits(&gb, 3);
396 4641 s->color_depth = get_bits(&gb, 2);
397 4641 has_diff = get_bits1(&gb);
398 4641 s->zlibprime_curr = get_bits1(&gb);
399 4641 s->zlibprime_prev = get_bits1(&gb);
400
401
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 4641 if (s->color_depth != 0 && s->color_depth != 2) {
402 ✗ av_log(avctx, AV_LOG_ERROR,
403 "%dx%d invalid color depth %d\n",
404 i, j, s->color_depth);
405 ✗ return AVERROR_INVALIDDATA;
406 }
407
408
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 4641 if (has_diff) {
409 ✗ if (size < 3) {
410 ✗ av_log(avctx, AV_LOG_ERROR, "size too small for diff\n");
411 ✗ return AVERROR_INVALIDDATA;
412 }
413 ✗ if (!s->keyframe) {
414 ✗ av_log(avctx, AV_LOG_ERROR,
415 "Inter frame without keyframe\n");
416 ✗ return AVERROR_INVALIDDATA;
417 }
418 ✗ s->diff_start = get_bits(&gb, 8);
419 ✗ s->diff_height = get_bits(&gb, 8);
420 ✗ if (s->diff_start + s->diff_height > cur_blk_height) {
421 ✗ av_log(avctx, AV_LOG_ERROR,
422 "Block parameters invalid: %d + %d > %d\n",
423 s->diff_start, s->diff_height, cur_blk_height);
424 ✗ return AVERROR_INVALIDDATA;
425 }
426 ✗ av_log(avctx, AV_LOG_DEBUG,
427 "%dx%d diff start %d height %d\n",
428 i, j, s->diff_start, s->diff_height);
429 ✗ size -= 2;
430 }
431
432
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 4641 if (s->zlibprime_prev)
433 4095 av_log(avctx, AV_LOG_DEBUG, "%dx%d zlibprime_prev\n", i, j);
434
435
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 4641 if (s->zlibprime_curr) {
436 ✗ int col = get_bits(&gb, 8);
437 ✗ int row = get_bits(&gb, 8);
438 ✗ av_log(avctx, AV_LOG_DEBUG, "%dx%d zlibprime_curr %dx%d\n",
439 i, j, col, row);
440 ✗ if (size < 3) {
441 ✗ av_log(avctx, AV_LOG_ERROR, "size too small for zlibprime_curr\n");
442 ✗ return AVERROR_INVALIDDATA;
443 }
444 ✗ size -= 2;
445 ✗ avpriv_request_sample(avctx, "zlibprime_curr");
446 ✗ return AVERROR_PATCHWELCOME;
447 }
448
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 4641 if (!s->blocks && (s->zlibprime_curr || s->zlibprime_prev)) {
449 ✗ av_log(avctx, AV_LOG_ERROR,
450 "no data available for zlib priming\n");
451 ✗ return AVERROR_INVALIDDATA;
452 }
453 4641 size--; // account for flags byte
454 }
455
456
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 9312 if (has_diff) {
457 int k;
458 ✗ int off = (s->image_height - y_pos - 1) * s->frame->linesize[0];
459
460 ✗ for (k = 0; k < cur_blk_height; k++) {
461 ✗ int x = off - k * s->frame->linesize[0] + x_pos * 3;
462 ✗ memcpy(s->frame->data[0] + x, s->keyframe + x,
463 ✗ cur_blk_width * 3);
464 }
465 }
466
467 /* skip unchanged blocks, which have size 0 */
468
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 9312 if (size) {
469
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 9312 if (flashsv_decode_block(avctx, avpkt, &gb, size,
470 cur_blk_width, cur_blk_height,
471 x_pos, y_pos,
472 9312 i + j * (h_blocks + !!h_part)))
473 ✗ av_log(avctx, AV_LOG_ERROR,
474 "error in decompression of block %dx%d\n", i, j);
475 }
476 }
477 }
478
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 409 if (s->is_keyframe && s->ver == 2) {
479
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 24 if (!s->keyframe) {
480 8 s->keyframe = av_malloc(s->frame->linesize[0] * avctx->height);
481
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 8 if (!s->keyframe) {
482 ✗ av_log(avctx, AV_LOG_ERROR, "Cannot allocate image data\n");
483 ✗ return AVERROR(ENOMEM);
484 }
485 }
486 24 memcpy(s->keyframe, s->frame->data[0],
487 24 s->frame->linesize[0] * avctx->height);
488 }
489
490
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 409 if ((ret = av_frame_ref(rframe, s->frame)) < 0)
491 ✗ return ret;
492
493 409 *got_frame = 1;
494
495
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 409 if ((get_bits_count(&gb) / 8) != buf_size)
496 ✗ av_log(avctx, AV_LOG_ERROR, "buffer not fully consumed (%d != %d)\n",
497 ✗ buf_size, (get_bits_count(&gb) / 8));
498
499 /* report that the buffer was completely consumed */
500 409 return buf_size;
501 }
502
503 #if CONFIG_FLASHSV_DECODER
504 const FFCodec ff_flashsv_decoder = {
505 .p.name = "flashsv",
506 CODEC_LONG_NAME("Flash Screen Video v1"),
507 .p.type = AVMEDIA_TYPE_VIDEO,
508 .p.id = AV_CODEC_ID_FLASHSV,
509 .priv_data_size = sizeof(FlashSVContext),
510 .init = flashsv_decode_init,
511 .close = flashsv_decode_end,
512 FF_CODEC_DECODE_CB(flashsv_decode_frame),
513 .p.capabilities = AV_CODEC_CAP_DR1,
514 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
515 };
516 #endif /* CONFIG_FLASHSV_DECODER */
517
518 #if CONFIG_FLASHSV2_DECODER
519 static const uint32_t ff_flashsv2_default_palette[128] = {
520 0x000000, 0x333333, 0x666666, 0x999999, 0xCCCCCC, 0xFFFFFF,
521 0x330000, 0x660000, 0x990000, 0xCC0000, 0xFF0000, 0x003300,
522 0x006600, 0x009900, 0x00CC00, 0x00FF00, 0x000033, 0x000066,
523 0x000099, 0x0000CC, 0x0000FF, 0x333300, 0x666600, 0x999900,
524 0xCCCC00, 0xFFFF00, 0x003333, 0x006666, 0x009999, 0x00CCCC,
525 0x00FFFF, 0x330033, 0x660066, 0x990099, 0xCC00CC, 0xFF00FF,
526 0xFFFF33, 0xFFFF66, 0xFFFF99, 0xFFFFCC, 0xFF33FF, 0xFF66FF,
527 0xFF99FF, 0xFFCCFF, 0x33FFFF, 0x66FFFF, 0x99FFFF, 0xCCFFFF,
528 0xCCCC33, 0xCCCC66, 0xCCCC99, 0xCCCCFF, 0xCC33CC, 0xCC66CC,
529 0xCC99CC, 0xCCFFCC, 0x33CCCC, 0x66CCCC, 0x99CCCC, 0xFFCCCC,
530 0x999933, 0x999966, 0x9999CC, 0x9999FF, 0x993399, 0x996699,
531 0x99CC99, 0x99FF99, 0x339999, 0x669999, 0xCC9999, 0xFF9999,
532 0x666633, 0x666699, 0x6666CC, 0x6666FF, 0x663366, 0x669966,
533 0x66CC66, 0x66FF66, 0x336666, 0x996666, 0xCC6666, 0xFF6666,
534 0x333366, 0x333399, 0x3333CC, 0x3333FF, 0x336633, 0x339933,
535 0x33CC33, 0x33FF33, 0x663333, 0x993333, 0xCC3333, 0xFF3333,
536 0x003366, 0x336600, 0x660033, 0x006633, 0x330066, 0x663300,
537 0x336699, 0x669933, 0x993366, 0x339966, 0x663399, 0x996633,
538 0x6699CC, 0x99CC66, 0xCC6699, 0x66CC99, 0x9966CC, 0xCC9966,
539 0x99CCFF, 0xCCFF99, 0xFF99CC, 0x99FFCC, 0xCC99FF, 0xFFCC99,
540 0x111111, 0x222222, 0x444444, 0x555555, 0xAAAAAA, 0xBBBBBB,
541 0xDDDDDD, 0xEEEEEE
542 };
543
544 8 static av_cold int flashsv2_decode_init(AVCodecContext *avctx)
545 {
546 8 FlashSVContext *s = avctx->priv_data;
547 int ret;
548
549 8 ret = flashsv_decode_init(avctx);
550
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 8 if (ret < 0)
551 ✗ return ret;
552 8 s->pal = ff_flashsv2_default_palette;
553 8 s->ver = 2;
554
555 8 return 0;
556 }
557
558 8 static av_cold int flashsv2_decode_end(AVCodecContext *avctx)
559 {
560 8 FlashSVContext *s = avctx->priv_data;
561
562 8 av_buffer_unref(&s->keyframedata_buf);
563 8 s->keyframedata = NULL;
564 8 av_freep(&s->blocks);
565 8 av_freep(&s->keyframe);
566 8 flashsv_decode_end(avctx);
567
568 8 return 0;
569 }
570
571 const FFCodec ff_flashsv2_decoder = {
572 .p.name = "flashsv2",
573 CODEC_LONG_NAME("Flash Screen Video v2"),
574 .p.type = AVMEDIA_TYPE_VIDEO,
575 .p.id = AV_CODEC_ID_FLASHSV2,
576 .priv_data_size = sizeof(FlashSVContext),
577 .init = flashsv2_decode_init,
578 .close = flashsv2_decode_end,
579 FF_CODEC_DECODE_CB(flashsv_decode_frame),
580 .p.capabilities = AV_CODEC_CAP_DR1,
581 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
582 };
583 #endif /* CONFIG_FLASHSV2_DECODER */
584