FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/flashsv.c
Date: 2021-09-24 20:55:06
Exec Total Coverage
Lines: 198 276 71.7%
Branches: 92 148 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 <stdio.h>
37 #include <stdlib.h>
38 #include <zlib.h>
39
40 #include "libavutil/intreadwrite.h"
41 #include "avcodec.h"
42 #include "bytestream.h"
43 #include "get_bits.h"
44 #include "internal.h"
45
46 typedef struct BlockInfo {
47 uint8_t *pos;
48 int size;
49 } BlockInfo;
50
51 typedef struct FlashSVContext {
52 AVCodecContext *avctx;
53 AVFrame *frame;
54 int image_width, image_height;
55 int block_width, block_height;
56 uint8_t *tmpblock;
57 int block_size;
58 z_stream zstream;
59 int ver;
60 const uint32_t *pal;
61 int is_keyframe;
62 uint8_t *keyframedata;
63 uint8_t *keyframe;
64 BlockInfo *blocks;
65 uint8_t *deflate_block;
66 int deflate_block_size;
67 int color_depth;
68 int zlibprime_curr, zlibprime_prev;
69 int diff_start, diff_height;
70 } FlashSVContext;
71
72 4641 static int decode_hybrid(const uint8_t *sptr, const uint8_t *sptr_end, uint8_t *dptr, int dx, int dy,
73 int h, int w, int stride, const uint32_t *pal)
74 {
75 int x, y;
76 4641 const uint8_t *orig_src = sptr;
77
78
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270759 for (y = dx + h; y > dx; y--) {
79 266118 uint8_t *dst = dptr + (y * stride) + dy * 3;
80
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15835602 for (x = 0; x < w; x++) {
81
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15569484 if (sptr >= sptr_end)
82 return AVERROR_INVALIDDATA;
83
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15569484 if (*sptr & 0x80) {
84 /* 15-bit color */
85 12342661 unsigned c = AV_RB16(sptr) & ~0x8000;
86 12342661 unsigned b = c & 0x1F;
87 12342661 unsigned g = (c >> 5) & 0x1F;
88 12342661 unsigned r = c >> 10;
89 /* 000aaabb -> aaabbaaa */
90 12342661 *dst++ = (b << 3) | (b >> 2);
91 12342661 *dst++ = (g << 3) | (g >> 2);
92 12342661 *dst++ = (r << 3) | (r >> 2);
93 12342661 sptr += 2;
94 } else {
95 /* palette index */
96 3226823 uint32_t c = pal[*sptr++];
97 3226823 bytestream_put_le24(&dst, c);
98 }
99 }
100 }
101 4641 return sptr - orig_src;
102 }
103
104 17 static av_cold int flashsv_decode_end(AVCodecContext *avctx)
105 {
106 17 FlashSVContext *s = avctx->priv_data;
107 17 inflateEnd(&s->zstream);
108 /* release the frame if needed */
109 17 av_frame_free(&s->frame);
110
111 /* free the tmpblock */
112 17 av_freep(&s->tmpblock);
113
114 17 return 0;
115 }
116
117 17 static av_cold int flashsv_decode_init(AVCodecContext *avctx)
118 {
119 17 FlashSVContext *s = avctx->priv_data;
120 int zret; // Zlib return code
121
122 17 s->avctx = avctx;
123 17 s->zstream.zalloc = Z_NULL;
124 17 s->zstream.zfree = Z_NULL;
125 17 s->zstream.opaque = Z_NULL;
126 17 zret = inflateInit(&s->zstream);
127
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17 if (zret != Z_OK) {
128 av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
129 return AVERROR_EXTERNAL;
130 }
131 17 avctx->pix_fmt = AV_PIX_FMT_BGR24;
132
133 17 s->frame = av_frame_alloc();
134
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17 if (!s->frame) {
135 return AVERROR(ENOMEM);
136 }
137
138 17 return 0;
139 }
140
141 4095 static int flashsv2_prime(FlashSVContext *s, uint8_t *src, int size)
142 {
143 z_stream zs;
144 int zret; // Zlib return code
145
146
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4095 if (!src)
147 return AVERROR_INVALIDDATA;
148
149 4095 zs.zalloc = NULL;
150 4095 zs.zfree = NULL;
151 4095 zs.opaque = NULL;
152
153 4095 s->zstream.next_in = src;
154 4095 s->zstream.avail_in = size;
155 4095 s->zstream.next_out = s->tmpblock;
156 4095 s->zstream.avail_out = s->block_size * 3;
157 4095 inflate(&s->zstream, Z_SYNC_FLUSH);
158
159
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4095 if (deflateInit(&zs, 0) != Z_OK)
160 return -1;
161 4095 zs.next_in = s->tmpblock;
162 4095 zs.avail_in = s->block_size * 3 - s->zstream.avail_out;
163 4095 zs.next_out = s->deflate_block;
164 4095 zs.avail_out = s->deflate_block_size;
165 4095 deflate(&zs, Z_SYNC_FLUSH);
166 4095 deflateEnd(&zs);
167
168
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4095 if ((zret = inflateReset(&s->zstream)) != Z_OK) {
169 av_log(s->avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
170 return AVERROR_UNKNOWN;
171 }
172
173 4095 s->zstream.next_in = s->deflate_block;
174 4095 s->zstream.avail_in = s->deflate_block_size - zs.avail_out;
175 4095 s->zstream.next_out = s->tmpblock;
176 4095 s->zstream.avail_out = s->block_size * 3;
177 4095 inflate(&s->zstream, Z_SYNC_FLUSH);
178
179 4095 return 0;
180 }
181
182 9312 static int flashsv_decode_block(AVCodecContext *avctx, const AVPacket *avpkt,
183 GetBitContext *gb, int block_size,
184 int width, int height, int x_pos, int y_pos,
185 int blk_idx)
186 {
187 9312 struct FlashSVContext *s = avctx->priv_data;
188 9312 uint8_t *line = s->tmpblock;
189 int k;
190 9312 int ret = inflateReset(&s->zstream);
191
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9312 if (ret != Z_OK) {
192 av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", ret);
193 return AVERROR_UNKNOWN;
194 }
195
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9312 if (s->zlibprime_curr || s->zlibprime_prev) {
196 4095 ret = flashsv2_prime(s,
197 4095 s->blocks[blk_idx].pos,
198 4095 s->blocks[blk_idx].size);
199
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4095 if (ret < 0)
200 return ret;
201 }
202 9312 s->zstream.next_in = avpkt->data + get_bits_count(gb) / 8;
203 9312 s->zstream.avail_in = block_size;
204 9312 s->zstream.next_out = s->tmpblock;
205 9312 s->zstream.avail_out = s->block_size * 3;
206 9312 ret = inflate(&s->zstream, Z_FINISH);
207
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9312 if (ret == Z_DATA_ERROR) {
208 av_log(avctx, AV_LOG_ERROR, "Zlib resync occurred\n");
209 inflateSync(&s->zstream);
210 ret = inflate(&s->zstream, Z_FINISH);
211 }
212
213 if (ret != Z_OK && ret != Z_STREAM_END) {
214 //return -1;
215 }
216
217
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9312 if (s->is_keyframe) {
218 546 s->blocks[blk_idx].pos = s->keyframedata + (get_bits_count(gb) / 8);
219 546 s->blocks[blk_idx].size = block_size;
220 }
221
222 9312 y_pos += s->diff_start;
223
224
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9312 if (!s->color_depth) {
225 /* Flash Screen Video stores the image upside down, so copy
226 * lines to destination in reverse order. */
227
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272517 for (k = 1; k <= s->diff_height; k++) {
228 267846 memcpy(s->frame->data[0] + x_pos * 3 +
229 267846 (s->image_height - y_pos - k) * s->frame->linesize[0],
230 267846 line, width * 3);
231 /* advance source pointer to next line */
232 267846 line += width * 3;
233 }
234 } else {
235 /* hybrid 15-bit/palette mode */
236 4641 ret = decode_hybrid(s->tmpblock, s->zstream.next_out,
237 4641 s->frame->data[0],
238 4641 s->image_height - (y_pos + 1 + s->diff_height),
239 x_pos, s->diff_height, width,
240 4641 s->frame->linesize[0], s->pal);
241
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4641 if (ret < 0) {
242 av_log(avctx, AV_LOG_ERROR, "decode_hybrid failed\n");
243 return ret;
244 }
245 }
246 9312 skip_bits_long(gb, 8 * block_size); /* skip the consumed bits */
247 9312 return 0;
248 }
249
250 8 static int calc_deflate_block_size(int tmpblock_size)
251 {
252 z_stream zstream;
253 int size;
254
255 8 zstream.zalloc = Z_NULL;
256 8 zstream.zfree = Z_NULL;
257 8 zstream.opaque = Z_NULL;
258
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8 if (deflateInit(&zstream, 0) != Z_OK)
259 return -1;
260 8 size = deflateBound(&zstream, tmpblock_size);
261 8 deflateEnd(&zstream);
262
263 8 return size;
264 }
265
266 409 static int flashsv_decode_frame(AVCodecContext *avctx, void *data,
267 int *got_frame, AVPacket *avpkt)
268 {
269 409 int buf_size = avpkt->size;
270 409 FlashSVContext *s = avctx->priv_data;
271 int h_blocks, v_blocks, h_part, v_part, i, j, ret;
272 GetBitContext gb;
273 409 int last_blockwidth = s->block_width;
274 409 int last_blockheight= s->block_height;
275
276 /* no supplementary picture */
277
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409 if (buf_size == 0)
278 return 0;
279
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409 if (buf_size < 4)
280 return -1;
281
282
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409 if ((ret = init_get_bits8(&gb, avpkt->data, buf_size)) < 0)
283 return ret;
284
285 /* start to parse the bitstream */
286 409 s->block_width = 16 * (get_bits(&gb, 4) + 1);
287 409 s->image_width = get_bits(&gb, 12);
288 409 s->block_height = 16 * (get_bits(&gb, 4) + 1);
289 409 s->image_height = get_bits(&gb, 12);
290
291
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409 if ( last_blockwidth != s->block_width
292
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392 || last_blockheight!= s->block_height)
293 17 av_freep(&s->blocks);
294
295
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409 if (s->ver == 2) {
296 204 skip_bits(&gb, 6);
297
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204 if (get_bits1(&gb)) {
298 avpriv_request_sample(avctx, "iframe");
299 return AVERROR_PATCHWELCOME;
300 }
301
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204 if (get_bits1(&gb)) {
302 avpriv_request_sample(avctx, "Custom palette");
303 return AVERROR_PATCHWELCOME;
304 }
305 }
306
307 /* calculate number of blocks and size of border (partial) blocks */
308 409 h_blocks = s->image_width / s->block_width;
309 409 h_part = s->image_width % s->block_width;
310 409 v_blocks = s->image_height / s->block_height;
311 409 v_part = s->image_height % s->block_height;
312
313 /* the block size could change between frames, make sure the buffer
314 * is large enough, if not, get a larger one */
315
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409 if (s->block_size < s->block_width * s->block_height) {
316 17 int tmpblock_size = 3 * s->block_width * s->block_height, err;
317
318
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17 if ((err = av_reallocp(&s->tmpblock, tmpblock_size)) < 0) {
319 s->block_size = 0;
320 av_log(avctx, AV_LOG_ERROR,
321 "Cannot allocate decompression buffer.\n");
322 return err;
323 }
324
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17 if (s->ver == 2) {
325 8 s->deflate_block_size = calc_deflate_block_size(tmpblock_size);
326
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8 if (s->deflate_block_size <= 0) {
327 av_log(avctx, AV_LOG_ERROR,
328 "Cannot determine deflate buffer size.\n");
329 return -1;
330 }
331
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8 if ((err = av_reallocp(&s->deflate_block, s->deflate_block_size)) < 0) {
332 s->block_size = 0;
333 av_log(avctx, AV_LOG_ERROR, "Cannot allocate deflate buffer.\n");
334 return err;
335 }
336 }
337 }
338 409 s->block_size = s->block_width * s->block_height;
339
340 /* initialize the image size once */
341
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409 if (avctx->width == 0 && avctx->height == 0) {
342
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9 if ((ret = ff_set_dimensions(avctx, s->image_width, s->image_height)) < 0)
343 return ret;
344 }
345
346 /* check for changes of image width and image height */
347
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409 if (avctx->width != s->image_width || avctx->height != s->image_height) {
348 av_log(avctx, AV_LOG_ERROR,
349 "Frame width or height differs from first frame!\n");
350 av_log(avctx, AV_LOG_ERROR, "fh = %d, fv %d vs ch = %d, cv = %d\n",
351 avctx->height, avctx->width, s->image_height, s->image_width);
352 return AVERROR_INVALIDDATA;
353 }
354
355 /* we care for keyframes only in Screen Video v2 */
356
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409 s->is_keyframe = (avpkt->flags & AV_PKT_FLAG_KEY) && (s->ver == 2);
357
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409 if (s->is_keyframe) {
358 int err;
359
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24 if ((err = av_reallocp(&s->keyframedata, avpkt->size)) < 0)
360 return err;
361 24 memcpy(s->keyframedata, avpkt->data, avpkt->size);
362 }
363
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409 if(s->ver == 2 && !s->blocks)
364 8 s->blocks = av_mallocz((v_blocks + !!v_part) * (h_blocks + !!h_part) *
365 sizeof(s->blocks[0]));
366
367 ff_dlog(avctx, "image: %dx%d block: %dx%d num: %dx%d part: %dx%d\n",
368 s->image_width, s->image_height, s->block_width, s->block_height,
369 h_blocks, v_blocks, h_part, v_part);
370
371
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409 if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0)
372 return ret;
373
374 /* loop over all block columns */
375
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2046 for (j = 0; j < v_blocks + (v_part ? 1 : 0); j++) {
376
377 1637 int y_pos = j * s->block_height; // vertical position in frame
378
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1637 int cur_blk_height = (j < v_blocks) ? s->block_height : v_part;
379
380 /* loop over all block rows */
381
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10949 for (i = 0; i < h_blocks + (h_part ? 1 : 0); i++) {
382 9312 int x_pos = i * s->block_width; // horizontal position in frame
383
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9312 int cur_blk_width = (i < h_blocks) ? s->block_width : h_part;
384 9312 int has_diff = 0;
385
386 /* get the size of the compressed zlib chunk */
387 9312 int size = get_bits(&gb, 16);
388
389 9312 s->color_depth = 0;
390 9312 s->zlibprime_curr = 0;
391 9312 s->zlibprime_prev = 0;
392 9312 s->diff_start = 0;
393 9312 s->diff_height = cur_blk_height;
394
395
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9312 if (8 * size > get_bits_left(&gb)) {
396 av_frame_unref(s->frame);
397 return AVERROR_INVALIDDATA;
398 }
399
400
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9312 if (s->ver == 2 && size) {
401 4641 skip_bits(&gb, 3);
402 4641 s->color_depth = get_bits(&gb, 2);
403 4641 has_diff = get_bits1(&gb);
404 4641 s->zlibprime_curr = get_bits1(&gb);
405 4641 s->zlibprime_prev = get_bits1(&gb);
406
407
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4641 if (s->color_depth != 0 && s->color_depth != 2) {
408 av_log(avctx, AV_LOG_ERROR,
409 "%dx%d invalid color depth %d\n",
410 i, j, s->color_depth);
411 return AVERROR_INVALIDDATA;
412 }
413
414
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4641 if (has_diff) {
415 if (size < 3) {
416 av_log(avctx, AV_LOG_ERROR, "size too small for diff\n");
417 return AVERROR_INVALIDDATA;
418 }
419 if (!s->keyframe) {
420 av_log(avctx, AV_LOG_ERROR,
421 "Inter frame without keyframe\n");
422 return AVERROR_INVALIDDATA;
423 }
424 s->diff_start = get_bits(&gb, 8);
425 s->diff_height = get_bits(&gb, 8);
426 if (s->diff_start + s->diff_height > cur_blk_height) {
427 av_log(avctx, AV_LOG_ERROR,
428 "Block parameters invalid: %d + %d > %d\n",
429 s->diff_start, s->diff_height, cur_blk_height);
430 return AVERROR_INVALIDDATA;
431 }
432 av_log(avctx, AV_LOG_DEBUG,
433 "%dx%d diff start %d height %d\n",
434 i, j, s->diff_start, s->diff_height);
435 size -= 2;
436 }
437
438
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4641 if (s->zlibprime_prev)
439 4095 av_log(avctx, AV_LOG_DEBUG, "%dx%d zlibprime_prev\n", i, j);
440
441
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4641 if (s->zlibprime_curr) {
442 int col = get_bits(&gb, 8);
443 int row = get_bits(&gb, 8);
444 av_log(avctx, AV_LOG_DEBUG, "%dx%d zlibprime_curr %dx%d\n",
445 i, j, col, row);
446 if (size < 3) {
447 av_log(avctx, AV_LOG_ERROR, "size too small for zlibprime_curr\n");
448 return AVERROR_INVALIDDATA;
449 }
450 size -= 2;
451 avpriv_request_sample(avctx, "zlibprime_curr");
452 return AVERROR_PATCHWELCOME;
453 }
454
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4641 if (!s->blocks && (s->zlibprime_curr || s->zlibprime_prev)) {
455 av_log(avctx, AV_LOG_ERROR,
456 "no data available for zlib priming\n");
457 return AVERROR_INVALIDDATA;
458 }
459 4641 size--; // account for flags byte
460 }
461
462
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9312 if (has_diff) {
463 int k;
464 int off = (s->image_height - y_pos - 1) * s->frame->linesize[0];
465
466 for (k = 0; k < cur_blk_height; k++) {
467 int x = off - k * s->frame->linesize[0] + x_pos * 3;
468 memcpy(s->frame->data[0] + x, s->keyframe + x,
469 cur_blk_width * 3);
470 }
471 }
472
473 /* skip unchanged blocks, which have size 0 */
474
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9312 if (size) {
475
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9312 if (flashsv_decode_block(avctx, avpkt, &gb, size,
476 cur_blk_width, cur_blk_height,
477 x_pos, y_pos,
478 9312 i + j * (h_blocks + !!h_part)))
479 av_log(avctx, AV_LOG_ERROR,
480 "error in decompression of block %dx%d\n", i, j);
481 }
482 }
483 }
484
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409 if (s->is_keyframe && s->ver == 2) {
485
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24 if (!s->keyframe) {
486 8 s->keyframe = av_malloc(s->frame->linesize[0] * avctx->height);
487
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8 if (!s->keyframe) {
488 av_log(avctx, AV_LOG_ERROR, "Cannot allocate image data\n");
489 return AVERROR(ENOMEM);
490 }
491 }
492 24 memcpy(s->keyframe, s->frame->data[0],
493 24 s->frame->linesize[0] * avctx->height);
494 }
495
496
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409 if ((ret = av_frame_ref(data, s->frame)) < 0)
497 return ret;
498
499 409 *got_frame = 1;
500
501
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409 if ((get_bits_count(&gb) / 8) != buf_size)
502 av_log(avctx, AV_LOG_ERROR, "buffer not fully consumed (%d != %d)\n",
503 buf_size, (get_bits_count(&gb) / 8));
504
505 /* report that the buffer was completely consumed */
506 409 return buf_size;
507 }
508
509 #if CONFIG_FLASHSV_DECODER
510 const AVCodec ff_flashsv_decoder = {
511 .name = "flashsv",
512 .long_name = NULL_IF_CONFIG_SMALL("Flash Screen Video v1"),
513 .type = AVMEDIA_TYPE_VIDEO,
514 .id = AV_CODEC_ID_FLASHSV,
515 .priv_data_size = sizeof(FlashSVContext),
516 .init = flashsv_decode_init,
517 .close = flashsv_decode_end,
518 .decode = flashsv_decode_frame,
519 .capabilities = AV_CODEC_CAP_DR1,
520 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
521 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_BGR24, AV_PIX_FMT_NONE },
522 };
523 #endif /* CONFIG_FLASHSV_DECODER */
524
525 #if CONFIG_FLASHSV2_DECODER
526 static const uint32_t ff_flashsv2_default_palette[128] = {
527 0x000000, 0x333333, 0x666666, 0x999999, 0xCCCCCC, 0xFFFFFF,
528 0x330000, 0x660000, 0x990000, 0xCC0000, 0xFF0000, 0x003300,
529 0x006600, 0x009900, 0x00CC00, 0x00FF00, 0x000033, 0x000066,
530 0x000099, 0x0000CC, 0x0000FF, 0x333300, 0x666600, 0x999900,
531 0xCCCC00, 0xFFFF00, 0x003333, 0x006666, 0x009999, 0x00CCCC,
532 0x00FFFF, 0x330033, 0x660066, 0x990099, 0xCC00CC, 0xFF00FF,
533 0xFFFF33, 0xFFFF66, 0xFFFF99, 0xFFFFCC, 0xFF33FF, 0xFF66FF,
534 0xFF99FF, 0xFFCCFF, 0x33FFFF, 0x66FFFF, 0x99FFFF, 0xCCFFFF,
535 0xCCCC33, 0xCCCC66, 0xCCCC99, 0xCCCCFF, 0xCC33CC, 0xCC66CC,
536 0xCC99CC, 0xCCFFCC, 0x33CCCC, 0x66CCCC, 0x99CCCC, 0xFFCCCC,
537 0x999933, 0x999966, 0x9999CC, 0x9999FF, 0x993399, 0x996699,
538 0x99CC99, 0x99FF99, 0x339999, 0x669999, 0xCC9999, 0xFF9999,
539 0x666633, 0x666699, 0x6666CC, 0x6666FF, 0x663366, 0x669966,
540 0x66CC66, 0x66FF66, 0x336666, 0x996666, 0xCC6666, 0xFF6666,
541 0x333366, 0x333399, 0x3333CC, 0x3333FF, 0x336633, 0x339933,
542 0x33CC33, 0x33FF33, 0x663333, 0x993333, 0xCC3333, 0xFF3333,
543 0x003366, 0x336600, 0x660033, 0x006633, 0x330066, 0x663300,
544 0x336699, 0x669933, 0x993366, 0x339966, 0x663399, 0x996633,
545 0x6699CC, 0x99CC66, 0xCC6699, 0x66CC99, 0x9966CC, 0xCC9966,
546 0x99CCFF, 0xCCFF99, 0xFF99CC, 0x99FFCC, 0xCC99FF, 0xFFCC99,
547 0x111111, 0x222222, 0x444444, 0x555555, 0xAAAAAA, 0xBBBBBB,
548 0xDDDDDD, 0xEEEEEE
549 };
550
551 8 static av_cold int flashsv2_decode_init(AVCodecContext *avctx)
552 {
553 8 FlashSVContext *s = avctx->priv_data;
554 int ret;
555
556 8 ret = flashsv_decode_init(avctx);
557
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8 if (ret < 0)
558 return ret;
559 8 s->pal = ff_flashsv2_default_palette;
560 8 s->ver = 2;
561
562 8 return 0;
563 }
564
565 8 static av_cold int flashsv2_decode_end(AVCodecContext *avctx)
566 {
567 8 FlashSVContext *s = avctx->priv_data;
568
569 8 av_freep(&s->keyframedata);
570 8 av_freep(&s->blocks);
571 8 av_freep(&s->keyframe);
572 8 av_freep(&s->deflate_block);
573 8 flashsv_decode_end(avctx);
574
575 8 return 0;
576 }
577
578 const AVCodec ff_flashsv2_decoder = {
579 .name = "flashsv2",
580 .long_name = NULL_IF_CONFIG_SMALL("Flash Screen Video v2"),
581 .type = AVMEDIA_TYPE_VIDEO,
582 .id = AV_CODEC_ID_FLASHSV2,
583 .priv_data_size = sizeof(FlashSVContext),
584 .init = flashsv2_decode_init,
585 .close = flashsv2_decode_end,
586 .decode = flashsv_decode_frame,
587 .capabilities = AV_CODEC_CAP_DR1,
588 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
589 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_BGR24, AV_PIX_FMT_NONE },
590 };
591 #endif /* CONFIG_FLASHSV2_DECODER */
592