Directory: | ../../../ffmpeg/ |
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File: | src/libavcodec/cinepak.c |
Date: | 2022-07-05 19:52:29 |
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Lines: | 223 | 254 | 87.8% |
Branches: | 114 | 160 | 71.2% |
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1 | /* | ||
2 | * Cinepak Video Decoder | ||
3 | * Copyright (C) 2003 The FFmpeg project | ||
4 | * | ||
5 | * This file is part of FFmpeg. | ||
6 | * | ||
7 | * FFmpeg is free software; you can redistribute it and/or | ||
8 | * modify it under the terms of the GNU Lesser General Public | ||
9 | * License as published by the Free Software Foundation; either | ||
10 | * version 2.1 of the License, or (at your option) any later version. | ||
11 | * | ||
12 | * FFmpeg is distributed in the hope that it will be useful, | ||
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
15 | * Lesser General Public License for more details. | ||
16 | * | ||
17 | * You should have received a copy of the GNU Lesser General Public | ||
18 | * License along with FFmpeg; if not, write to the Free Software | ||
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
20 | */ | ||
21 | |||
22 | /** | ||
23 | * @file | ||
24 | * Cinepak video decoder | ||
25 | * @author Ewald Snel <ewald@rambo.its.tudelft.nl> | ||
26 | * | ||
27 | * @see For more information on the Cinepak algorithm, visit: | ||
28 | * http://www.csse.monash.edu.au/~timf/ | ||
29 | * @see For more information on the quirky data inside Sega FILM/CPK files, visit: | ||
30 | * http://wiki.multimedia.cx/index.php?title=Sega_FILM | ||
31 | * | ||
32 | * Cinepak colorspace support (c) 2013 Rl, Aetey Global Technologies AB | ||
33 | * @author Cinepak colorspace, Rl, Aetey Global Technologies AB | ||
34 | */ | ||
35 | |||
36 | #include <stdio.h> | ||
37 | #include <stdlib.h> | ||
38 | #include <string.h> | ||
39 | |||
40 | #include "libavutil/common.h" | ||
41 | #include "libavutil/intreadwrite.h" | ||
42 | #include "avcodec.h" | ||
43 | #include "codec_internal.h" | ||
44 | #include "decode.h" | ||
45 | #include "internal.h" | ||
46 | |||
47 | |||
48 | typedef uint8_t cvid_codebook[12]; | ||
49 | |||
50 | #define MAX_STRIPS 32 | ||
51 | |||
52 | typedef struct cvid_strip { | ||
53 | uint16_t id; | ||
54 | uint16_t x1, y1; | ||
55 | uint16_t x2, y2; | ||
56 | cvid_codebook v4_codebook[256]; | ||
57 | cvid_codebook v1_codebook[256]; | ||
58 | } cvid_strip; | ||
59 | |||
60 | typedef struct CinepakContext { | ||
61 | |||
62 | AVCodecContext *avctx; | ||
63 | AVFrame *frame; | ||
64 | |||
65 | const unsigned char *data; | ||
66 | int size; | ||
67 | |||
68 | int width, height; | ||
69 | |||
70 | int palette_video; | ||
71 | cvid_strip strips[MAX_STRIPS]; | ||
72 | |||
73 | int sega_film_skip_bytes; | ||
74 | |||
75 | uint32_t pal[256]; | ||
76 | } CinepakContext; | ||
77 | |||
78 | 2070 | static void cinepak_decode_codebook (cvid_codebook *codebook, | |
79 | int chunk_id, int size, const uint8_t *data) | ||
80 | { | ||
81 | 2070 | const uint8_t *eod = (data + size); | |
82 | uint32_t flag, mask; | ||
83 | int i, n; | ||
84 | uint8_t *p; | ||
85 | |||
86 | /* check if this chunk contains 4- or 6-element vectors */ | ||
87 |
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2070 | n = (chunk_id & 0x04) ? 4 : 6; |
88 | 2070 | flag = 0; | |
89 | 2070 | mask = 0; | |
90 | |||
91 | 2070 | p = codebook[0]; | |
92 |
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376213 | for (i=0; i < 256; i++) { |
93 |
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374848 | if ((chunk_id & 0x01) && !(mask >>= 1)) { |
94 |
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6919 | if ((data + 4) > eod) |
95 | 127 | break; | |
96 | |||
97 | 6792 | flag = AV_RB32 (data); | |
98 | 6792 | data += 4; | |
99 | 6792 | mask = 0x80000000; | |
100 | } | ||
101 | |||
102 |
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608510 | if (!(chunk_id & 0x01) || (flag & mask)) { |
103 | int k, kk; | ||
104 | |||
105 |
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234367 | if ((data + n) > eod) |
106 | 578 | break; | |
107 | |||
108 |
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1168945 | for (k = 0; k < 4; ++k) { |
109 | 935156 | int r = *data++; | |
110 |
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3740624 | for (kk = 0; kk < 3; ++kk) |
111 | 2805468 | *p++ = r; | |
112 | } | ||
113 |
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233789 | if (n == 6) { |
114 | int r, g, b, u, v; | ||
115 | 211134 | u = *(int8_t *)data++; | |
116 | 211134 | v = *(int8_t *)data++; | |
117 | 211134 | p -= 12; | |
118 |
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1055670 | for(k=0; k<4; ++k) { |
119 | 844536 | r = *p++ + v*2; | |
120 | 844536 | g = *p++ - (u/2) - v; | |
121 | 844536 | b = *p + u*2; | |
122 | 844536 | p -= 2; | |
123 | 844536 | *p++ = av_clip_uint8(r); | |
124 | 844536 | *p++ = av_clip_uint8(g); | |
125 | 844536 | *p++ = av_clip_uint8(b); | |
126 | } | ||
127 | } | ||
128 | } else { | ||
129 | 140354 | p += 12; | |
130 | } | ||
131 | } | ||
132 | 2070 | } | |
133 | |||
134 | 1035 | static int cinepak_decode_vectors (CinepakContext *s, cvid_strip *strip, | |
135 | int chunk_id, int size, const uint8_t *data) | ||
136 | { | ||
137 | 1035 | const uint8_t *eod = (data + size); | |
138 | uint32_t flag, mask; | ||
139 | uint8_t *cb0, *cb1, *cb2, *cb3; | ||
140 | int x, y; | ||
141 | char *ip0, *ip1, *ip2, *ip3; | ||
142 | |||
143 | 1035 | flag = 0; | |
144 | 1035 | mask = 0; | |
145 | |||
146 |
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19017 | for (y=strip->y1; y < strip->y2; y+=4) { |
147 | |||
148 | /* take care of y dimension not being multiple of 4, such streams exist */ | ||
149 | 35968 | ip0 = ip1 = ip2 = ip3 = s->frame->data[0] + | |
150 |
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17984 | (s->palette_video?strip->x1:strip->x1*3) + (y * s->frame->linesize[0]); |
151 |
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17984 | if(s->avctx->height - y > 1) { |
152 | 17984 | ip1 = ip0 + s->frame->linesize[0]; | |
153 |
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17984 | if(s->avctx->height - y > 2) { |
154 | 17984 | ip2 = ip1 + s->frame->linesize[0]; | |
155 |
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17984 | if(s->avctx->height - y > 3) { |
156 | 17754 | ip3 = ip2 + s->frame->linesize[0]; | |
157 | } | ||
158 | } | ||
159 | } | ||
160 | /* to get the correct picture for not-multiple-of-4 cases let us fill each | ||
161 | * block from the bottom up, thus possibly overwriting the bottommost line | ||
162 | * more than once but ending with the correct data in place | ||
163 | * (instead of in-loop checking) */ | ||
164 | |||
165 |
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1132191 | for (x=strip->x1; x < strip->x2; x+=4) { |
166 |
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1114209 | if ((chunk_id & 0x01) && !(mask >>= 1)) { |
167 |
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27954 | if ((data + 4) > eod) |
168 | ✗ | return AVERROR_INVALIDDATA; | |
169 | |||
170 | 27954 | flag = AV_RB32 (data); | |
171 | 27954 | data += 4; | |
172 | 27954 | mask = 0x80000000; | |
173 | } | ||
174 | |||
175 |
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1114209 | if (!(chunk_id & 0x01) || (flag & mask)) { |
176 |
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785916 | if (!(chunk_id & 0x02) && !(mask >>= 1)) { |
177 |
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23418 | if ((data + 4) > eod) |
178 | ✗ | return AVERROR_INVALIDDATA; | |
179 | |||
180 | 23418 | flag = AV_RB32 (data); | |
181 | 23418 | data += 4; | |
182 | 23418 | mask = 0x80000000; | |
183 | } | ||
184 | |||
185 |
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1041354 | if ((chunk_id & 0x02) || (~flag & mask)) { |
186 | uint8_t *p; | ||
187 |
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255438 | if (data >= eod) |
188 | ✗ | return AVERROR_INVALIDDATA; | |
189 | |||
190 | 255438 | p = strip->v1_codebook[*data++]; | |
191 |
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255438 | if (s->palette_video) { |
192 | ✗ | ip3[0] = ip3[1] = ip2[0] = ip2[1] = p[6]; | |
193 | ✗ | ip3[2] = ip3[3] = ip2[2] = ip2[3] = p[9]; | |
194 | ✗ | ip1[0] = ip1[1] = ip0[0] = ip0[1] = p[0]; | |
195 | ✗ | ip1[2] = ip1[3] = ip0[2] = ip0[3] = p[3]; | |
196 | } else { | ||
197 | 255438 | p += 6; | |
198 | 255438 | memcpy(ip3 + 0, p, 3); memcpy(ip3 + 3, p, 3); | |
199 | 255438 | memcpy(ip2 + 0, p, 3); memcpy(ip2 + 3, p, 3); | |
200 | 255438 | p += 3; /* ... + 9 */ | |
201 | 255438 | memcpy(ip3 + 6, p, 3); memcpy(ip3 + 9, p, 3); | |
202 | 255438 | memcpy(ip2 + 6, p, 3); memcpy(ip2 + 9, p, 3); | |
203 | 255438 | p -= 9; /* ... + 0 */ | |
204 | 255438 | memcpy(ip1 + 0, p, 3); memcpy(ip1 + 3, p, 3); | |
205 | 255438 | memcpy(ip0 + 0, p, 3); memcpy(ip0 + 3, p, 3); | |
206 | 255438 | p += 3; /* ... + 3 */ | |
207 | 255438 | memcpy(ip1 + 6, p, 3); memcpy(ip1 + 9, p, 3); | |
208 | 255438 | memcpy(ip0 + 6, p, 3); memcpy(ip0 + 9, p, 3); | |
209 | } | ||
210 | |||
211 |
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530478 | } else if (flag & mask) { |
212 |
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530478 | if ((data + 4) > eod) |
213 | 2 | return AVERROR_INVALIDDATA; | |
214 | |||
215 | 530476 | cb0 = strip->v4_codebook[*data++]; | |
216 | 530476 | cb1 = strip->v4_codebook[*data++]; | |
217 | 530476 | cb2 = strip->v4_codebook[*data++]; | |
218 | 530476 | cb3 = strip->v4_codebook[*data++]; | |
219 |
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530476 | if (s->palette_video) { |
220 | uint8_t *p; | ||
221 | 66297 | p = ip3; | |
222 | 66297 | *p++ = cb2[6]; | |
223 | 66297 | *p++ = cb2[9]; | |
224 | 66297 | *p++ = cb3[6]; | |
225 | 66297 | *p = cb3[9]; | |
226 | 66297 | p = ip2; | |
227 | 66297 | *p++ = cb2[0]; | |
228 | 66297 | *p++ = cb2[3]; | |
229 | 66297 | *p++ = cb3[0]; | |
230 | 66297 | *p = cb3[3]; | |
231 | 66297 | p = ip1; | |
232 | 66297 | *p++ = cb0[6]; | |
233 | 66297 | *p++ = cb0[9]; | |
234 | 66297 | *p++ = cb1[6]; | |
235 | 66297 | *p = cb1[9]; | |
236 | 66297 | p = ip0; | |
237 | 66297 | *p++ = cb0[0]; | |
238 | 66297 | *p++ = cb0[3]; | |
239 | 66297 | *p++ = cb1[0]; | |
240 | 66297 | *p = cb1[3]; | |
241 | } else { | ||
242 | 464179 | memcpy(ip3 + 0, cb2 + 6, 6); | |
243 | 464179 | memcpy(ip3 + 6, cb3 + 6, 6); | |
244 | 464179 | memcpy(ip2 + 0, cb2 + 0, 6); | |
245 | 464179 | memcpy(ip2 + 6, cb3 + 0, 6); | |
246 | 464179 | memcpy(ip1 + 0, cb0 + 6, 6); | |
247 | 464179 | memcpy(ip1 + 6, cb1 + 6, 6); | |
248 | 464179 | memcpy(ip0 + 0, cb0 + 0, 6); | |
249 | 464179 | memcpy(ip0 + 6, cb1 + 0, 6); | |
250 | } | ||
251 | |||
252 | } | ||
253 | } | ||
254 | |||
255 |
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1114207 | if (s->palette_video) { |
256 | 66297 | ip0 += 4; ip1 += 4; | |
257 | 66297 | ip2 += 4; ip3 += 4; | |
258 | } else { | ||
259 | 1047910 | ip0 += 12; ip1 += 12; | |
260 | 1047910 | ip2 += 12; ip3 += 12; | |
261 | } | ||
262 | } | ||
263 | } | ||
264 | |||
265 | 1033 | return 0; | |
266 | } | ||
267 | |||
268 | 1035 | static int cinepak_decode_strip (CinepakContext *s, | |
269 | cvid_strip *strip, const uint8_t *data, int size) | ||
270 | { | ||
271 | 1035 | const uint8_t *eod = (data + size); | |
272 | int chunk_id, chunk_size; | ||
273 | |||
274 | /* coordinate sanity checks */ | ||
275 |
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1035 | if (strip->x2 > s->width || |
276 |
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1035 | strip->y2 > s->height || |
277 |
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1035 | strip->x1 >= strip->x2 || strip->y1 >= strip->y2) |
278 | ✗ | return AVERROR_INVALIDDATA; | |
279 | |||
280 |
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3105 | while ((data + 4) <= eod) { |
281 | 3105 | chunk_id = data[0]; | |
282 | 3105 | chunk_size = AV_RB24 (&data[1]) - 4; | |
283 |
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3105 | if(chunk_size < 0) |
284 | ✗ | return AVERROR_INVALIDDATA; | |
285 | |||
286 | 3105 | data += 4; | |
287 |
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3105 | chunk_size = ((data + chunk_size) > eod) ? (eod - data) : chunk_size; |
288 | |||
289 |
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3105 | switch (chunk_id) { |
290 | |||
291 | 1035 | case 0x20: | |
292 | case 0x21: | ||
293 | case 0x24: | ||
294 | case 0x25: | ||
295 | 1035 | cinepak_decode_codebook (strip->v4_codebook, chunk_id, | |
296 | chunk_size, data); | ||
297 | 1035 | break; | |
298 | |||
299 | 1035 | case 0x22: | |
300 | case 0x23: | ||
301 | case 0x26: | ||
302 | case 0x27: | ||
303 | 1035 | cinepak_decode_codebook (strip->v1_codebook, chunk_id, | |
304 | chunk_size, data); | ||
305 | 1035 | break; | |
306 | |||
307 | 1035 | case 0x30: | |
308 | case 0x31: | ||
309 | case 0x32: | ||
310 | 1035 | return cinepak_decode_vectors (s, strip, chunk_id, | |
311 | chunk_size, data); | ||
312 | } | ||
313 | |||
314 | 2070 | data += chunk_size; | |
315 | } | ||
316 | |||
317 | ✗ | return AVERROR_INVALIDDATA; | |
318 | } | ||
319 | |||
320 | 547 | static int cinepak_predecode_check (CinepakContext *s) | |
321 | { | ||
322 | int num_strips; | ||
323 | int encoded_buf_size; | ||
324 | |||
325 | 547 | num_strips = AV_RB16 (&s->data[8]); | |
326 | 547 | encoded_buf_size = AV_RB24(&s->data[1]); | |
327 | |||
328 |
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547 | if (s->size < encoded_buf_size * (int64_t)(100 - s->avctx->discard_damaged_percentage) / 100) |
329 | ✗ | return AVERROR_INVALIDDATA; | |
330 | |||
331 | /* if this is the first frame, check for deviant Sega FILM data */ | ||
332 |
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547 | if (s->sega_film_skip_bytes == -1) { |
333 |
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7 | if (!encoded_buf_size) { |
334 | ✗ | avpriv_request_sample(s->avctx, "encoded_buf_size 0"); | |
335 | ✗ | return AVERROR_PATCHWELCOME; | |
336 | } | ||
337 |
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7 | if (encoded_buf_size != s->size && (s->size % encoded_buf_size) != 0) { |
338 | /* If the encoded frame size differs from the frame size as indicated | ||
339 | * by the container file, this data likely comes from a Sega FILM/CPK file. | ||
340 | * If the frame header is followed by the bytes FE 00 00 06 00 00 then | ||
341 | * this is probably one of the two known files that have 6 extra bytes | ||
342 | * after the frame header. Else, assume 2 extra bytes. The container | ||
343 | * size also cannot be a multiple of the encoded size. */ | ||
344 |
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1 | if (s->size >= 16 && |
345 |
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1 | (s->data[10] == 0xFE) && |
346 | ✗ | (s->data[11] == 0x00) && | |
347 | ✗ | (s->data[12] == 0x00) && | |
348 | ✗ | (s->data[13] == 0x06) && | |
349 | ✗ | (s->data[14] == 0x00) && | |
350 | ✗ | (s->data[15] == 0x00)) | |
351 | ✗ | s->sega_film_skip_bytes = 6; | |
352 | else | ||
353 | 1 | s->sega_film_skip_bytes = 2; | |
354 | } else | ||
355 | 6 | s->sega_film_skip_bytes = 0; | |
356 | } | ||
357 | |||
358 |
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547 | if (s->size < 10 + s->sega_film_skip_bytes + num_strips * 12) |
359 | ✗ | return AVERROR_INVALIDDATA; | |
360 | |||
361 |
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547 | if (num_strips) { |
362 | 547 | const uint8_t *data = s->data + 10 + s->sega_film_skip_bytes; | |
363 | 547 | int strip_size = AV_RB24 (data + 1); | |
364 |
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547 | if (strip_size < 12 || strip_size > encoded_buf_size) |
365 | ✗ | return AVERROR_INVALIDDATA; | |
366 | } | ||
367 | |||
368 | 547 | return 0; | |
369 | } | ||
370 | |||
371 | 547 | static int cinepak_decode (CinepakContext *s) | |
372 | { | ||
373 | 547 | const uint8_t *eod = (s->data + s->size); | |
374 | int i, result, strip_size, frame_flags, num_strips; | ||
375 | 547 | int y0 = 0; | |
376 | |||
377 | 547 | frame_flags = s->data[0]; | |
378 | 547 | num_strips = AV_RB16 (&s->data[8]); | |
379 | |||
380 | 547 | s->data += 10 + s->sega_film_skip_bytes; | |
381 | |||
382 | 547 | num_strips = FFMIN(num_strips, MAX_STRIPS); | |
383 | |||
384 | 547 | s->frame->key_frame = 0; | |
385 | |||
386 |
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1580 | for (i=0; i < num_strips; i++) { |
387 |
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1035 | if ((s->data + 12) > eod) |
388 | ✗ | return AVERROR_INVALIDDATA; | |
389 | |||
390 | 1035 | s->strips[i].id = s->data[0]; | |
391 | /* zero y1 means "relative to the previous stripe" */ | ||
392 |
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1035 | if (!(s->strips[i].y1 = AV_RB16 (&s->data[4]))) |
393 | 1035 | s->strips[i].y2 = (s->strips[i].y1 = y0) + AV_RB16 (&s->data[8]); | |
394 | else | ||
395 | ✗ | s->strips[i].y2 = AV_RB16 (&s->data[8]); | |
396 | 1035 | s->strips[i].x1 = AV_RB16 (&s->data[6]); | |
397 | 1035 | s->strips[i].x2 = AV_RB16 (&s->data[10]); | |
398 | |||
399 |
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1035 | if (s->strips[i].id == 0x10) |
400 | 136 | s->frame->key_frame = 1; | |
401 | |||
402 | 1035 | strip_size = AV_RB24 (&s->data[1]) - 12; | |
403 |
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1035 | if (strip_size < 0) |
404 | ✗ | return AVERROR_INVALIDDATA; | |
405 | 1035 | s->data += 12; | |
406 |
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1035 | strip_size = ((s->data + strip_size) > eod) ? (eod - s->data) : strip_size; |
407 | |||
408 |
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1035 | if ((i > 0) && !(frame_flags & 0x01)) { |
409 | 67 | memcpy (s->strips[i].v4_codebook, s->strips[i-1].v4_codebook, | |
410 | sizeof(s->strips[i].v4_codebook)); | ||
411 | 67 | memcpy (s->strips[i].v1_codebook, s->strips[i-1].v1_codebook, | |
412 | sizeof(s->strips[i].v1_codebook)); | ||
413 | } | ||
414 | |||
415 | 1035 | result = cinepak_decode_strip (s, &s->strips[i], s->data, strip_size); | |
416 | |||
417 |
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1035 | if (result != 0) |
418 | 2 | return result; | |
419 | |||
420 | 1033 | s->data += strip_size; | |
421 | 1033 | y0 = s->strips[i].y2; | |
422 | } | ||
423 | 545 | return 0; | |
424 | } | ||
425 | |||
426 | 14 | static av_cold int cinepak_decode_init(AVCodecContext *avctx) | |
427 | { | ||
428 | 14 | CinepakContext *s = avctx->priv_data; | |
429 | |||
430 | 14 | s->avctx = avctx; | |
431 | 14 | s->width = (avctx->width + 3) & ~3; | |
432 | 14 | s->height = (avctx->height + 3) & ~3; | |
433 | |||
434 | 14 | s->sega_film_skip_bytes = -1; /* uninitialized state */ | |
435 | |||
436 | // check for paletted data | ||
437 |
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14 | if (avctx->bits_per_coded_sample != 8) { |
438 | 12 | s->palette_video = 0; | |
439 | 12 | avctx->pix_fmt = AV_PIX_FMT_RGB24; | |
440 | } else { | ||
441 | 2 | s->palette_video = 1; | |
442 | 2 | avctx->pix_fmt = AV_PIX_FMT_PAL8; | |
443 | } | ||
444 | |||
445 | 14 | s->frame = av_frame_alloc(); | |
446 |
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14 | if (!s->frame) |
447 | ✗ | return AVERROR(ENOMEM); | |
448 | |||
449 | 14 | return 0; | |
450 | } | ||
451 | |||
452 | 547 | static int cinepak_decode_frame(AVCodecContext *avctx, AVFrame *rframe, | |
453 | int *got_frame, AVPacket *avpkt) | ||
454 | { | ||
455 | 547 | const uint8_t *buf = avpkt->data; | |
456 | 547 | int ret = 0, buf_size = avpkt->size; | |
457 | 547 | CinepakContext *s = avctx->priv_data; | |
458 | int num_strips; | ||
459 | |||
460 | 547 | s->data = buf; | |
461 | 547 | s->size = buf_size; | |
462 | |||
463 |
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547 | if (s->size < 10) |
464 | ✗ | return AVERROR_INVALIDDATA; | |
465 | |||
466 | 547 | num_strips = AV_RB16 (&s->data[8]); | |
467 | |||
468 | //Empty frame, do not waste time | ||
469 |
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547 | if (!num_strips && (!s->palette_video || !av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL))) |
470 | ✗ | return buf_size; | |
471 | |||
472 |
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547 | if ((ret = cinepak_predecode_check(s)) < 0) { |
473 | ✗ | av_log(avctx, AV_LOG_ERROR, "cinepak_predecode_check failed\n"); | |
474 | ✗ | return ret; | |
475 | } | ||
476 | |||
477 |
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547 | if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0) |
478 | ✗ | return ret; | |
479 | |||
480 |
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547 | if (s->palette_video) { |
481 | 56 | s->frame->palette_has_changed = ff_copy_palette(s->pal, avpkt, avctx); | |
482 | } | ||
483 | |||
484 |
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547 | if ((ret = cinepak_decode(s)) < 0) { |
485 | 2 | av_log(avctx, AV_LOG_ERROR, "cinepak_decode failed\n"); | |
486 | } | ||
487 | |||
488 |
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547 | if (s->palette_video) |
489 | 56 | memcpy (s->frame->data[1], s->pal, AVPALETTE_SIZE); | |
490 | |||
491 |
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547 | if ((ret = av_frame_ref(rframe, s->frame)) < 0) |
492 | ✗ | return ret; | |
493 | |||
494 | 547 | *got_frame = 1; | |
495 | |||
496 | /* report that the buffer was completely consumed */ | ||
497 | 547 | return buf_size; | |
498 | } | ||
499 | |||
500 | 14 | static av_cold int cinepak_decode_end(AVCodecContext *avctx) | |
501 | { | ||
502 | 14 | CinepakContext *s = avctx->priv_data; | |
503 | |||
504 | 14 | av_frame_free(&s->frame); | |
505 | |||
506 | 14 | return 0; | |
507 | } | ||
508 | |||
509 | const FFCodec ff_cinepak_decoder = { | ||
510 | .p.name = "cinepak", | ||
511 | .p.long_name = NULL_IF_CONFIG_SMALL("Cinepak"), | ||
512 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
513 | .p.id = AV_CODEC_ID_CINEPAK, | ||
514 | .priv_data_size = sizeof(CinepakContext), | ||
515 | .init = cinepak_decode_init, | ||
516 | .close = cinepak_decode_end, | ||
517 | FF_CODEC_DECODE_CB(cinepak_decode_frame), | ||
518 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
519 | .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, | ||
520 | }; | ||
521 |