FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/flashsv.c
Date: 2022-07-04 19:11:22
Exec Total Coverage
Lines: 190 261 72.8%
Branches: 89 142 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 <stdio.h>
39 #include <stdlib.h>
40 #include <zlib.h>
41
42 #include "libavutil/intreadwrite.h"
43 #include "avcodec.h"
44 #include "bytestream.h"
45 #include "codec_internal.h"
46 #include "get_bits.h"
47 #include "internal.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 inflate(zstream, Z_SYNC_FLUSH);
153 4095 remaining = s->block_size * 3 - zstream->avail_out;
154
155
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4095 if ((zret = inflateReset(zstream)) != Z_OK) {
156 av_log(s->avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
157 return AVERROR_UNKNOWN;
158 }
159
160 /* Create input for zlib that is equivalent to encoding the output
161 * from above and decoding it again (the net result of this is that
162 * the dictionary of past decoded data is correctly primed and
163 * the adler32 checksum is correctly initialized).
164 * This is accomplished by synthetizing blocks of uncompressed data
165 * out of the output from above. See section 3.2.4 of RFC 1951. */
166 4095 zstream->next_in = zlib_header;
167 4095 zstream->avail_in = sizeof(zlib_header);
168 4095 inflate(zstream, Z_SYNC_FLUSH);
169
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8190 while (remaining > 0) {
170 4095 unsigned block_size = FFMIN(UINT16_MAX, remaining);
171 uint8_t header[5];
172 /* Bit 0: Non-last-block, bits 1-2: BTYPE for uncompressed block */
173 4095 header[0] = 0;
174 /* Block size */
175 4095 AV_WL16(header + 1, block_size);
176 /* Block size (one's complement) */
177 4095 AV_WL16(header + 3, block_size ^ 0xFFFF);
178 4095 zstream->next_in = header;
179 4095 zstream->avail_in = sizeof(header);
180 4095 zstream->next_out = s->tmp;
181 4095 zstream->avail_out = sizeof(s->tmp);
182 4095 zret = inflate(zstream, Z_SYNC_FLUSH);
183
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4095 if (zret != Z_OK)
184 return AVERROR_UNKNOWN;
185 4095 zstream->next_in = data;
186 4095 zstream->avail_in = block_size;
187 4095 zret = inflate(zstream, Z_SYNC_FLUSH);
188
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4095 if (zret != Z_OK)
189 return AVERROR_UNKNOWN;
190 4095 data += block_size;
191 4095 remaining -= block_size;
192 }
193
194 4095 return 0;
195 }
196
197 9312 static int flashsv_decode_block(AVCodecContext *avctx, const AVPacket *avpkt,
198 GetBitContext *gb, int block_size,
199 int width, int height, int x_pos, int y_pos,
200 int blk_idx)
201 {
202 9312 struct FlashSVContext *s = avctx->priv_data;
203 9312 z_stream *const zstream = &s->zstream.zstream;
204 9312 uint8_t *line = s->tmpblock;
205 int k;
206 9312 int ret = inflateReset(zstream);
207
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9312 if (ret != Z_OK) {
208 av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", ret);
209 return AVERROR_UNKNOWN;
210 }
211
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9312 if (s->zlibprime_curr || s->zlibprime_prev) {
212 4095 ret = flashsv2_prime(s,
213 4095 s->blocks[blk_idx].pos,
214 4095 s->blocks[blk_idx].size);
215
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4095 if (ret < 0)
216 return ret;
217 }
218 9312 zstream->next_in = avpkt->data + get_bits_count(gb) / 8;
219 9312 zstream->avail_in = block_size;
220 9312 zstream->next_out = s->tmpblock;
221 9312 zstream->avail_out = s->block_size * 3;
222 9312 ret = inflate(zstream, Z_FINISH);
223
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9312 if (ret == Z_DATA_ERROR) {
224 av_log(avctx, AV_LOG_ERROR, "Zlib resync occurred\n");
225 inflateSync(zstream);
226 ret = inflate(zstream, Z_FINISH);
227 }
228
229 if (ret != Z_OK && ret != Z_STREAM_END) {
230 //return -1;
231 }
232
233
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9312 if (s->is_keyframe) {
234 546 s->blocks[blk_idx].pos = s->keyframedata + (get_bits_count(gb) / 8);
235 546 s->blocks[blk_idx].size = block_size;
236 }
237
238 9312 y_pos += s->diff_start;
239
240
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9312 if (!s->color_depth) {
241 /* Flash Screen Video stores the image upside down, so copy
242 * lines to destination in reverse order. */
243
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272517 for (k = 1; k <= s->diff_height; k++) {
244 267846 memcpy(s->frame->data[0] + x_pos * 3 +
245 267846 (s->image_height - y_pos - k) * s->frame->linesize[0],
246 267846 line, width * 3);
247 /* advance source pointer to next line */
248 267846 line += width * 3;
249 }
250 } else {
251 /* hybrid 15-bit/palette mode */
252 4641 ret = decode_hybrid(s->tmpblock, zstream->next_out,
253 4641 s->frame->data[0],
254 4641 s->image_height - (y_pos + 1 + s->diff_height),
255 x_pos, s->diff_height, width,
256 4641 s->frame->linesize[0], s->pal);
257
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4641 if (ret < 0) {
258 av_log(avctx, AV_LOG_ERROR, "decode_hybrid failed\n");
259 return ret;
260 }
261 }
262 9312 skip_bits_long(gb, 8 * block_size); /* skip the consumed bits */
263 9312 return 0;
264 }
265
266 409 static int flashsv_decode_frame(AVCodecContext *avctx, AVFrame *rframe,
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 }
325 409 s->block_size = s->block_width * s->block_height;
326
327 /* initialize the image size once */
328
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409 if (avctx->width == 0 && avctx->height == 0) {
329
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9 if ((ret = ff_set_dimensions(avctx, s->image_width, s->image_height)) < 0)
330 return ret;
331 }
332
333 /* check for changes of image width and image height */
334
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409 if (avctx->width != s->image_width || avctx->height != s->image_height) {
335 av_log(avctx, AV_LOG_ERROR,
336 "Frame width or height differs from first frame!\n");
337 av_log(avctx, AV_LOG_ERROR, "fh = %d, fv %d vs ch = %d, cv = %d\n",
338 avctx->height, avctx->width, s->image_height, s->image_width);
339 return AVERROR_INVALIDDATA;
340 }
341
342 /* we care for keyframes only in Screen Video v2 */
343
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409 s->is_keyframe = (avpkt->flags & AV_PKT_FLAG_KEY) && (s->ver == 2);
344
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409 if (s->is_keyframe) {
345 24 int err = av_buffer_replace(&s->keyframedata_buf, avpkt->buf);
346
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24 if (err < 0)
347 return err;
348 24 s->keyframedata = avpkt->data;
349 }
350
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409 if(s->ver == 2 && !s->blocks)
351 8 s->blocks = av_mallocz((v_blocks + !!v_part) * (h_blocks + !!h_part) *
352 sizeof(s->blocks[0]));
353
354 ff_dlog(avctx, "image: %dx%d block: %dx%d num: %dx%d part: %dx%d\n",
355 s->image_width, s->image_height, s->block_width, s->block_height,
356 h_blocks, v_blocks, h_part, v_part);
357
358
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409 if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0)
359 return ret;
360
361 /* loop over all block columns */
362
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2046 for (j = 0; j < v_blocks + (v_part ? 1 : 0); j++) {
363
364 1637 int y_pos = j * s->block_height; // vertical position in frame
365
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1637 int cur_blk_height = (j < v_blocks) ? s->block_height : v_part;
366
367 /* loop over all block rows */
368
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10949 for (i = 0; i < h_blocks + (h_part ? 1 : 0); i++) {
369 9312 int x_pos = i * s->block_width; // horizontal position in frame
370
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9312 int cur_blk_width = (i < h_blocks) ? s->block_width : h_part;
371 9312 int has_diff = 0;
372
373 /* get the size of the compressed zlib chunk */
374 9312 int size = get_bits(&gb, 16);
375
376 9312 s->color_depth = 0;
377 9312 s->zlibprime_curr = 0;
378 9312 s->zlibprime_prev = 0;
379 9312 s->diff_start = 0;
380 9312 s->diff_height = cur_blk_height;
381
382
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9312 if (8 * size > get_bits_left(&gb)) {
383 av_frame_unref(s->frame);
384 return AVERROR_INVALIDDATA;
385 }
386
387
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9312 if (s->ver == 2 && size) {
388 4641 skip_bits(&gb, 3);
389 4641 s->color_depth = get_bits(&gb, 2);
390 4641 has_diff = get_bits1(&gb);
391 4641 s->zlibprime_curr = get_bits1(&gb);
392 4641 s->zlibprime_prev = get_bits1(&gb);
393
394
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4641 if (s->color_depth != 0 && s->color_depth != 2) {
395 av_log(avctx, AV_LOG_ERROR,
396 "%dx%d invalid color depth %d\n",
397 i, j, s->color_depth);
398 return AVERROR_INVALIDDATA;
399 }
400
401
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4641 if (has_diff) {
402 if (size < 3) {
403 av_log(avctx, AV_LOG_ERROR, "size too small for diff\n");
404 return AVERROR_INVALIDDATA;
405 }
406 if (!s->keyframe) {
407 av_log(avctx, AV_LOG_ERROR,
408 "Inter frame without keyframe\n");
409 return AVERROR_INVALIDDATA;
410 }
411 s->diff_start = get_bits(&gb, 8);
412 s->diff_height = get_bits(&gb, 8);
413 if (s->diff_start + s->diff_height > cur_blk_height) {
414 av_log(avctx, AV_LOG_ERROR,
415 "Block parameters invalid: %d + %d > %d\n",
416 s->diff_start, s->diff_height, cur_blk_height);
417 return AVERROR_INVALIDDATA;
418 }
419 av_log(avctx, AV_LOG_DEBUG,
420 "%dx%d diff start %d height %d\n",
421 i, j, s->diff_start, s->diff_height);
422 size -= 2;
423 }
424
425
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4641 if (s->zlibprime_prev)
426 4095 av_log(avctx, AV_LOG_DEBUG, "%dx%d zlibprime_prev\n", i, j);
427
428
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4641 if (s->zlibprime_curr) {
429 int col = get_bits(&gb, 8);
430 int row = get_bits(&gb, 8);
431 av_log(avctx, AV_LOG_DEBUG, "%dx%d zlibprime_curr %dx%d\n",
432 i, j, col, row);
433 if (size < 3) {
434 av_log(avctx, AV_LOG_ERROR, "size too small for zlibprime_curr\n");
435 return AVERROR_INVALIDDATA;
436 }
437 size -= 2;
438 avpriv_request_sample(avctx, "zlibprime_curr");
439 return AVERROR_PATCHWELCOME;
440 }
441
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4641 if (!s->blocks && (s->zlibprime_curr || s->zlibprime_prev)) {
442 av_log(avctx, AV_LOG_ERROR,
443 "no data available for zlib priming\n");
444 return AVERROR_INVALIDDATA;
445 }
446 4641 size--; // account for flags byte
447 }
448
449
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9312 if (has_diff) {
450 int k;
451 int off = (s->image_height - y_pos - 1) * s->frame->linesize[0];
452
453 for (k = 0; k < cur_blk_height; k++) {
454 int x = off - k * s->frame->linesize[0] + x_pos * 3;
455 memcpy(s->frame->data[0] + x, s->keyframe + x,
456 cur_blk_width * 3);
457 }
458 }
459
460 /* skip unchanged blocks, which have size 0 */
461
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9312 if (size) {
462
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9312 if (flashsv_decode_block(avctx, avpkt, &gb, size,
463 cur_blk_width, cur_blk_height,
464 x_pos, y_pos,
465 9312 i + j * (h_blocks + !!h_part)))
466 av_log(avctx, AV_LOG_ERROR,
467 "error in decompression of block %dx%d\n", i, j);
468 }
469 }
470 }
471
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409 if (s->is_keyframe && s->ver == 2) {
472
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24 if (!s->keyframe) {
473 8 s->keyframe = av_malloc(s->frame->linesize[0] * avctx->height);
474
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8 if (!s->keyframe) {
475 av_log(avctx, AV_LOG_ERROR, "Cannot allocate image data\n");
476 return AVERROR(ENOMEM);
477 }
478 }
479 24 memcpy(s->keyframe, s->frame->data[0],
480 24 s->frame->linesize[0] * avctx->height);
481 }
482
483
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409 if ((ret = av_frame_ref(rframe, s->frame)) < 0)
484 return ret;
485
486 409 *got_frame = 1;
487
488
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409 if ((get_bits_count(&gb) / 8) != buf_size)
489 av_log(avctx, AV_LOG_ERROR, "buffer not fully consumed (%d != %d)\n",
490 buf_size, (get_bits_count(&gb) / 8));
491
492 /* report that the buffer was completely consumed */
493 409 return buf_size;
494 }
495
496 #if CONFIG_FLASHSV_DECODER
497 const FFCodec ff_flashsv_decoder = {
498 .p.name = "flashsv",
499 .p.long_name = NULL_IF_CONFIG_SMALL("Flash Screen Video v1"),
500 .p.type = AVMEDIA_TYPE_VIDEO,
501 .p.id = AV_CODEC_ID_FLASHSV,
502 .priv_data_size = sizeof(FlashSVContext),
503 .init = flashsv_decode_init,
504 .close = flashsv_decode_end,
505 FF_CODEC_DECODE_CB(flashsv_decode_frame),
506 .p.capabilities = AV_CODEC_CAP_DR1,
507 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
508 .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_BGR24, AV_PIX_FMT_NONE },
509 };
510 #endif /* CONFIG_FLASHSV_DECODER */
511
512 #if CONFIG_FLASHSV2_DECODER
513 static const uint32_t ff_flashsv2_default_palette[128] = {
514 0x000000, 0x333333, 0x666666, 0x999999, 0xCCCCCC, 0xFFFFFF,
515 0x330000, 0x660000, 0x990000, 0xCC0000, 0xFF0000, 0x003300,
516 0x006600, 0x009900, 0x00CC00, 0x00FF00, 0x000033, 0x000066,
517 0x000099, 0x0000CC, 0x0000FF, 0x333300, 0x666600, 0x999900,
518 0xCCCC00, 0xFFFF00, 0x003333, 0x006666, 0x009999, 0x00CCCC,
519 0x00FFFF, 0x330033, 0x660066, 0x990099, 0xCC00CC, 0xFF00FF,
520 0xFFFF33, 0xFFFF66, 0xFFFF99, 0xFFFFCC, 0xFF33FF, 0xFF66FF,
521 0xFF99FF, 0xFFCCFF, 0x33FFFF, 0x66FFFF, 0x99FFFF, 0xCCFFFF,
522 0xCCCC33, 0xCCCC66, 0xCCCC99, 0xCCCCFF, 0xCC33CC, 0xCC66CC,
523 0xCC99CC, 0xCCFFCC, 0x33CCCC, 0x66CCCC, 0x99CCCC, 0xFFCCCC,
524 0x999933, 0x999966, 0x9999CC, 0x9999FF, 0x993399, 0x996699,
525 0x99CC99, 0x99FF99, 0x339999, 0x669999, 0xCC9999, 0xFF9999,
526 0x666633, 0x666699, 0x6666CC, 0x6666FF, 0x663366, 0x669966,
527 0x66CC66, 0x66FF66, 0x336666, 0x996666, 0xCC6666, 0xFF6666,
528 0x333366, 0x333399, 0x3333CC, 0x3333FF, 0x336633, 0x339933,
529 0x33CC33, 0x33FF33, 0x663333, 0x993333, 0xCC3333, 0xFF3333,
530 0x003366, 0x336600, 0x660033, 0x006633, 0x330066, 0x663300,
531 0x336699, 0x669933, 0x993366, 0x339966, 0x663399, 0x996633,
532 0x6699CC, 0x99CC66, 0xCC6699, 0x66CC99, 0x9966CC, 0xCC9966,
533 0x99CCFF, 0xCCFF99, 0xFF99CC, 0x99FFCC, 0xCC99FF, 0xFFCC99,
534 0x111111, 0x222222, 0x444444, 0x555555, 0xAAAAAA, 0xBBBBBB,
535 0xDDDDDD, 0xEEEEEE
536 };
537
538 8 static av_cold int flashsv2_decode_init(AVCodecContext *avctx)
539 {
540 8 FlashSVContext *s = avctx->priv_data;
541 int ret;
542
543 8 ret = flashsv_decode_init(avctx);
544
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8 if (ret < 0)
545 return ret;
546 8 s->pal = ff_flashsv2_default_palette;
547 8 s->ver = 2;
548
549 8 return 0;
550 }
551
552 8 static av_cold int flashsv2_decode_end(AVCodecContext *avctx)
553 {
554 8 FlashSVContext *s = avctx->priv_data;
555
556 8 av_buffer_unref(&s->keyframedata_buf);
557 8 av_freep(&s->blocks);
558 8 av_freep(&s->keyframe);
559 8 flashsv_decode_end(avctx);
560
561 8 return 0;
562 }
563
564 const FFCodec ff_flashsv2_decoder = {
565 .p.name = "flashsv2",
566 .p.long_name = NULL_IF_CONFIG_SMALL("Flash Screen Video v2"),
567 .p.type = AVMEDIA_TYPE_VIDEO,
568 .p.id = AV_CODEC_ID_FLASHSV2,
569 .priv_data_size = sizeof(FlashSVContext),
570 .init = flashsv2_decode_init,
571 .close = flashsv2_decode_end,
572 FF_CODEC_DECODE_CB(flashsv_decode_frame),
573 .p.capabilities = AV_CODEC_CAP_DR1,
574 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
575 .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_BGR24, AV_PIX_FMT_NONE },
576 };
577 #endif /* CONFIG_FLASHSV2_DECODER */
578