GCC Code Coverage Report | |||||||||||||||||||||
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Line | Branch | Exec | Source |
1 |
/* |
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2 |
* VMware Screen Codec (VMnc) decoder |
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3 |
* Copyright (c) 2006 Konstantin Shishkov |
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4 |
* |
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5 |
* This file is part of FFmpeg. |
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6 |
* |
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7 |
* FFmpeg is free software; you can redistribute it and/or |
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8 |
* modify it under the terms of the GNU Lesser General Public |
||
9 |
* License as published by the Free Software Foundation; either |
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10 |
* version 2.1 of the License, or (at your option) any later version. |
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11 |
* |
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12 |
* FFmpeg is distributed in the hope that it will be useful, |
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13 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 |
* Lesser General Public License for more details. |
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16 |
* |
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17 |
* You should have received a copy of the GNU Lesser General Public |
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18 |
* License along with FFmpeg; if not, write to the Free Software |
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19 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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20 |
*/ |
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21 |
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22 |
/** |
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23 |
* @file |
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24 |
* VMware Screen Codec (VMnc) decoder |
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25 |
* As Alex Beregszaszi discovered, this is effectively RFB data dump |
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26 |
*/ |
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27 |
|||
28 |
#include <stdio.h> |
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29 |
#include <stdlib.h> |
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30 |
|||
31 |
#include "libavutil/common.h" |
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32 |
#include "libavutil/intreadwrite.h" |
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33 |
#include "avcodec.h" |
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34 |
#include "internal.h" |
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35 |
#include "bytestream.h" |
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36 |
|||
37 |
enum EncTypes { |
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38 |
MAGIC_WMVd = 0x574D5664, |
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39 |
MAGIC_WMVe, |
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40 |
MAGIC_WMVf, |
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41 |
MAGIC_WMVg, |
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42 |
MAGIC_WMVh, |
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43 |
MAGIC_WMVi, |
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44 |
MAGIC_WMVj |
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45 |
}; |
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46 |
|||
47 |
enum HexTile_Flags { |
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48 |
HT_RAW = 1, // tile is raw |
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49 |
HT_BKG = 2, // background color is present |
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50 |
HT_FG = 4, // foreground color is present |
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51 |
HT_SUB = 8, // subrects are present |
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52 |
HT_CLR = 16 // each subrect has own color |
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53 |
}; |
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54 |
|||
55 |
/* |
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56 |
* Decoder context |
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57 |
*/ |
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58 |
typedef struct VmncContext { |
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59 |
AVCodecContext *avctx; |
||
60 |
AVFrame *pic; |
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61 |
|||
62 |
int bpp; |
||
63 |
int bpp2; |
||
64 |
int bigendian; |
||
65 |
uint8_t pal[768]; |
||
66 |
int width, height; |
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67 |
GetByteContext gb; |
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68 |
|||
69 |
/* cursor data */ |
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70 |
int cur_w, cur_h; |
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71 |
int cur_x, cur_y; |
||
72 |
int cur_hx, cur_hy; |
||
73 |
uint8_t *curbits, *curmask; |
||
74 |
uint8_t *screendta; |
||
75 |
} VmncContext; |
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76 |
|||
77 |
/* read pixel value from stream */ |
||
78 |
401741 |
static av_always_inline int vmnc_get_pixel(GetByteContext *gb, int bpp, int be) |
|
79 |
{ |
||
80 |
✗✓✗✓ ✗✗ |
401741 |
switch (bpp * 2 + be) { |
81 |
case 2: |
||
82 |
case 3: |
||
83 |
return bytestream2_get_byte(gb); |
||
84 |
58268 |
case 4: |
|
85 |
58268 |
return bytestream2_get_le16(gb); |
|
86 |
case 5: |
||
87 |
return bytestream2_get_be16(gb); |
||
88 |
343473 |
case 8: |
|
89 |
343473 |
return bytestream2_get_le32(gb); |
|
90 |
case 9: |
||
91 |
return bytestream2_get_be32(gb); |
||
92 |
default: return 0; |
||
93 |
} |
||
94 |
} |
||
95 |
|||
96 |
16 |
static void load_cursor(VmncContext *c) |
|
97 |
{ |
||
98 |
int i, j, p; |
||
99 |
16 |
const int bpp = c->bpp2; |
|
100 |
16 |
uint8_t *dst8 = c->curbits; |
|
101 |
16 |
uint16_t *dst16 = (uint16_t *)c->curbits; |
|
102 |
16 |
uint32_t *dst32 = (uint32_t *)c->curbits; |
|
103 |
|||
104 |
✓✓ | 432 |
for (j = 0; j < c->cur_h; j++) { |
105 |
✓✓ | 13728 |
for (i = 0; i < c->cur_w; i++) { |
106 |
13312 |
p = vmnc_get_pixel(&c->gb, bpp, c->bigendian); |
|
107 |
✗✓ | 13312 |
if (bpp == 1) |
108 |
*dst8++ = p; |
||
109 |
✗✓ | 13312 |
if (bpp == 2) |
110 |
*dst16++ = p; |
||
111 |
✓✗ | 13312 |
if (bpp == 4) |
112 |
13312 |
*dst32++ = p; |
|
113 |
} |
||
114 |
} |
||
115 |
16 |
dst8 = c->curmask; |
|
116 |
16 |
dst16 = (uint16_t*)c->curmask; |
|
117 |
16 |
dst32 = (uint32_t*)c->curmask; |
|
118 |
✓✓ | 432 |
for (j = 0; j < c->cur_h; j++) { |
119 |
✓✓ | 13728 |
for (i = 0; i < c->cur_w; i++) { |
120 |
13312 |
p = vmnc_get_pixel(&c->gb, bpp, c->bigendian); |
|
121 |
✗✓ | 13312 |
if (bpp == 1) |
122 |
*dst8++ = p; |
||
123 |
✗✓ | 13312 |
if (bpp == 2) |
124 |
*dst16++ = p; |
||
125 |
✓✗ | 13312 |
if (bpp == 4) |
126 |
13312 |
*dst32++ = p; |
|
127 |
} |
||
128 |
} |
||
129 |
16 |
} |
|
130 |
|||
131 |
49 |
static void put_cursor(uint8_t *dst, int stride, VmncContext *c, int dx, int dy) |
|
132 |
{ |
||
133 |
int i, j; |
||
134 |
int w, h, x, y; |
||
135 |
49 |
w = c->cur_w; |
|
136 |
✗✓ | 49 |
if (c->width < c->cur_x + c->cur_w) |
137 |
w = c->width - c->cur_x; |
||
138 |
49 |
h = c->cur_h; |
|
139 |
✗✓ | 49 |
if (c->height < c->cur_y + c->cur_h) |
140 |
h = c->height - c->cur_y; |
||
141 |
49 |
x = c->cur_x; |
|
142 |
49 |
y = c->cur_y; |
|
143 |
✗✓ | 49 |
if (x < 0) { |
144 |
w += x; |
||
145 |
x = 0; |
||
146 |
} |
||
147 |
✗✓ | 49 |
if (y < 0) { |
148 |
h += y; |
||
149 |
y = 0; |
||
150 |
} |
||
151 |
|||
152 |
✓✗✗✓ |
49 |
if ((w < 1) || (h < 1)) |
153 |
return; |
||
154 |
49 |
dst += x * c->bpp2 + y * stride; |
|
155 |
|||
156 |
✗✓ | 49 |
if (c->bpp2 == 1) { |
157 |
uint8_t *cd = c->curbits, *msk = c->curmask; |
||
158 |
for (j = 0; j < h; j++) { |
||
159 |
for (i = 0; i < w; i++) |
||
160 |
dst[i] = (dst[i] & cd[i]) ^ msk[i]; |
||
161 |
msk += c->cur_w; |
||
162 |
cd += c->cur_w; |
||
163 |
dst += stride; |
||
164 |
} |
||
165 |
✗✓ | 49 |
} else if (c->bpp2 == 2) { |
166 |
uint16_t *cd = (uint16_t*)c->curbits, *msk = (uint16_t*)c->curmask; |
||
167 |
uint16_t *dst2; |
||
168 |
for (j = 0; j < h; j++) { |
||
169 |
dst2 = (uint16_t*)dst; |
||
170 |
for (i = 0; i < w; i++) |
||
171 |
dst2[i] = (dst2[i] & cd[i]) ^ msk[i]; |
||
172 |
msk += c->cur_w; |
||
173 |
cd += c->cur_w; |
||
174 |
dst += stride; |
||
175 |
} |
||
176 |
✓✗ | 49 |
} else if (c->bpp2 == 4) { |
177 |
49 |
uint32_t *cd = (uint32_t*)c->curbits, *msk = (uint32_t*)c->curmask; |
|
178 |
uint32_t *dst2; |
||
179 |
✓✓ | 1617 |
for (j = 0; j < h; j++) { |
180 |
1568 |
dst2 = (uint32_t*)dst; |
|
181 |
✓✓ | 51744 |
for (i = 0; i < w; i++) |
182 |
50176 |
dst2[i] = (dst2[i] & cd[i]) ^ msk[i]; |
|
183 |
1568 |
msk += c->cur_w; |
|
184 |
1568 |
cd += c->cur_w; |
|
185 |
1568 |
dst += stride; |
|
186 |
} |
||
187 |
} |
||
188 |
} |
||
189 |
|||
190 |
/* fill rectangle with given color */ |
||
191 |
443805 |
static av_always_inline void paint_rect(uint8_t *dst, int dx, int dy, |
|
192 |
int w, int h, int color, |
||
193 |
int bpp, int stride) |
||
194 |
{ |
||
195 |
int i, j; |
||
196 |
443805 |
dst += dx * bpp + dy * stride; |
|
197 |
✗✓ | 443805 |
if (bpp == 1) { |
198 |
for (j = 0; j < h; j++) { |
||
199 |
memset(dst, color, w); |
||
200 |
dst += stride; |
||
201 |
} |
||
202 |
✓✓ | 443805 |
} else if (bpp == 2) { |
203 |
uint16_t *dst2; |
||
204 |
✓✓ | 779284 |
for (j = 0; j < h; j++) { |
205 |
687588 |
dst2 = (uint16_t*)dst; |
|
206 |
✓✓ | 9596125 |
for (i = 0; i < w; i++) |
207 |
8908537 |
*dst2++ = color; |
|
208 |
687588 |
dst += stride; |
|
209 |
} |
||
210 |
✓✗ | 352109 |
} else if (bpp == 4) { |
211 |
uint32_t *dst2; |
||
212 |
✓✓ | 1672564 |
for (j = 0; j < h; j++) { |
213 |
1320455 |
dst2 = (uint32_t*)dst; |
|
214 |
✓✓ | 14028614 |
for (i = 0; i < w; i++) |
215 |
12708159 |
dst2[i] = color; |
|
216 |
1320455 |
dst += stride; |
|
217 |
} |
||
218 |
} |
||
219 |
443805 |
} |
|
220 |
|||
221 |
50 |
static av_always_inline void paint_raw(uint8_t *dst, int w, int h, |
|
222 |
GetByteContext *gb, int bpp, |
||
223 |
int be, int stride) |
||
224 |
{ |
||
225 |
int i, j, p; |
||
226 |
✓✓ | 467 |
for (j = 0; j < h; j++) { |
227 |
✓✓ | 6621 |
for (i = 0; i < w; i++) { |
228 |
6204 |
p = vmnc_get_pixel(gb, bpp, be); |
|
229 |
✗✗✓✗ |
6204 |
switch (bpp) { |
230 |
case 1: |
||
231 |
dst[i] = p; |
||
232 |
break; |
||
233 |
case 2: |
||
234 |
((uint16_t*)dst)[i] = p; |
||
235 |
break; |
||
236 |
6204 |
case 4: |
|
237 |
6204 |
((uint32_t*)dst)[i] = p; |
|
238 |
6204 |
break; |
|
239 |
} |
||
240 |
6204 |
} |
|
241 |
417 |
dst += stride; |
|
242 |
} |
||
243 |
50 |
} |
|
244 |
|||
245 |
463 |
static int decode_hextile(VmncContext *c, uint8_t* dst, GetByteContext *gb, |
|
246 |
int w, int h, int stride) |
||
247 |
{ |
||
248 |
int i, j, k; |
||
249 |
463 |
int bg = 0, fg = 0, rects, color, flags, xy, wh; |
|
250 |
463 |
const int bpp = c->bpp2; |
|
251 |
uint8_t *dst2; |
||
252 |
463 |
int bw = 16, bh = 16; |
|
253 |
|||
254 |
✓✓ | 2709 |
for (j = 0; j < h; j += 16) { |
255 |
2247 |
dst2 = dst; |
|
256 |
2247 |
bw = 16; |
|
257 |
✓✓ | 2247 |
if (j + 16 > h) |
258 |
420 |
bh = h - j; |
|
259 |
✓✓ | 78438 |
for (i = 0; i < w; i += 16, dst2 += 16 * bpp) { |
260 |
✗✓ | 76192 |
if (bytestream2_get_bytes_left(gb) <= 0) { |
261 |
av_log(c->avctx, AV_LOG_ERROR, "Premature end of data!\n"); |
||
262 |
return AVERROR_INVALIDDATA; |
||
263 |
} |
||
264 |
✓✓ | 76192 |
if (i + 16 > w) |
265 |
2103 |
bw = w - i; |
|
266 |
76192 |
flags = bytestream2_get_byte(gb); |
|
267 |
✓✓ | 76192 |
if (flags & HT_RAW) { |
268 |
✗✓ | 42 |
if (bytestream2_get_bytes_left(gb) < bw * bh * bpp) { |
269 |
av_log(c->avctx, AV_LOG_ERROR, "Premature end of data!\n"); |
||
270 |
return AVERROR_INVALIDDATA; |
||
271 |
} |
||
272 |
42 |
paint_raw(dst2, bw, bh, gb, bpp, c->bigendian, stride); |
|
273 |
} else { |
||
274 |
✓✓ | 76150 |
if (flags & HT_BKG) |
275 |
1377 |
bg = vmnc_get_pixel(gb, bpp, c->bigendian); |
|
276 |
✓✓ | 76150 |
if (flags & HT_FG) |
277 |
1494 |
fg = vmnc_get_pixel(gb, bpp, c->bigendian); |
|
278 |
76150 |
rects = 0; |
|
279 |
✓✓ | 76150 |
if (flags & HT_SUB) |
280 |
30064 |
rects = bytestream2_get_byte(gb); |
|
281 |
76150 |
color = !!(flags & HT_CLR); |
|
282 |
|||
283 |
76150 |
paint_rect(dst2, 0, 0, bw, bh, bg, bpp, stride); |
|
284 |
|||
285 |
✓✓ | 76150 |
if (bytestream2_get_bytes_left(gb) < rects * (color * bpp + 2)) { |
286 |
1 |
av_log(c->avctx, AV_LOG_ERROR, "Premature end of data!\n"); |
|
287 |
1 |
return AVERROR_INVALIDDATA; |
|
288 |
} |
||
289 |
✓✓ | 443804 |
for (k = 0; k < rects; k++) { |
290 |
int rect_x, rect_y, rect_w, rect_h; |
||
291 |
✓✓ | 367655 |
if (color) |
292 |
366042 |
fg = vmnc_get_pixel(gb, bpp, c->bigendian); |
|
293 |
367655 |
xy = bytestream2_get_byte(gb); |
|
294 |
367655 |
wh = bytestream2_get_byte(gb); |
|
295 |
|||
296 |
367655 |
rect_x = xy >> 4; |
|
297 |
367655 |
rect_y = xy & 0xF; |
|
298 |
367655 |
rect_w = (wh >> 4) + 1; |
|
299 |
367655 |
rect_h = (wh & 0xF) + 1; |
|
300 |
|||
301 |
✓✗✗✓ |
367655 |
if (rect_x + rect_w > w - i || rect_y + rect_h > h - j) { |
302 |
av_log(c->avctx, AV_LOG_ERROR, "Rectangle outside picture\n"); |
||
303 |
return AVERROR_INVALIDDATA; |
||
304 |
} |
||
305 |
|||
306 |
367655 |
paint_rect(dst2, rect_x, rect_y, |
|
307 |
rect_w, rect_h, fg, bpp, stride); |
||
308 |
} |
||
309 |
} |
||
310 |
} |
||
311 |
2246 |
dst += stride * 16; |
|
312 |
} |
||
313 |
462 |
return 0; |
|
314 |
} |
||
315 |
|||
316 |
static void reset_buffers(VmncContext *c) |
||
317 |
{ |
||
318 |
av_freep(&c->curbits); |
||
319 |
av_freep(&c->curmask); |
||
320 |
av_freep(&c->screendta); |
||
321 |
c->cur_w = c->cur_h = 0; |
||
322 |
c->cur_hx = c->cur_hy = 0; |
||
323 |
|||
324 |
} |
||
325 |
|||
326 |
242 |
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, |
|
327 |
AVPacket *avpkt) |
||
328 |
{ |
||
329 |
242 |
const uint8_t *buf = avpkt->data; |
|
330 |
242 |
int buf_size = avpkt->size; |
|
331 |
242 |
VmncContext * const c = avctx->priv_data; |
|
332 |
242 |
GetByteContext *gb = &c->gb; |
|
333 |
uint8_t *outptr; |
||
334 |
int dx, dy, w, h, depth, enc, chunks, res, size_left, ret; |
||
335 |
|||
336 |
242 |
bytestream2_init(gb, buf, buf_size); |
|
337 |
242 |
bytestream2_skip(gb, 2); |
|
338 |
242 |
chunks = bytestream2_get_be16(gb); |
|
339 |
✗✓ | 242 |
if (12LL * chunks > bytestream2_get_bytes_left(gb)) |
340 |
return AVERROR_INVALIDDATA; |
||
341 |
|||
342 |
✗✓ | 242 |
if ((ret = ff_reget_buffer(avctx, c->pic, 0)) < 0) |
343 |
return ret; |
||
344 |
|||
345 |
242 |
c->pic->key_frame = 0; |
|
346 |
242 |
c->pic->pict_type = AV_PICTURE_TYPE_P; |
|
347 |
|||
348 |
// restore screen after cursor |
||
349 |
✓✓ | 242 |
if (c->screendta) { |
350 |
int i; |
||
351 |
49 |
w = c->cur_w; |
|
352 |
✗✓ | 49 |
if (c->width < c->cur_x + w) |
353 |
w = c->width - c->cur_x; |
||
354 |
49 |
h = c->cur_h; |
|
355 |
✗✓ | 49 |
if (c->height < c->cur_y + h) |
356 |
h = c->height - c->cur_y; |
||
357 |
49 |
dx = c->cur_x; |
|
358 |
✗✓ | 49 |
if (dx < 0) { |
359 |
w += dx; |
||
360 |
dx = 0; |
||
361 |
} |
||
362 |
49 |
dy = c->cur_y; |
|
363 |
✗✓ | 49 |
if (dy < 0) { |
364 |
h += dy; |
||
365 |
dy = 0; |
||
366 |
} |
||
367 |
✓✗✓✗ |
49 |
if ((w > 0) && (h > 0)) { |
368 |
49 |
outptr = c->pic->data[0] + dx * c->bpp2 + dy * c->pic->linesize[0]; |
|
369 |
✓✓ | 1617 |
for (i = 0; i < h; i++) { |
370 |
1568 |
memcpy(outptr, c->screendta + i * c->cur_w * c->bpp2, |
|
371 |
1568 |
w * c->bpp2); |
|
372 |
1568 |
outptr += c->pic->linesize[0]; |
|
373 |
} |
||
374 |
} |
||
375 |
} |
||
376 |
|||
377 |
✓✓ | 808 |
while (chunks--) { |
378 |
✗✓ | 567 |
if (bytestream2_get_bytes_left(gb) < 12) { |
379 |
av_log(avctx, AV_LOG_ERROR, "Premature end of data!\n"); |
||
380 |
return -1; |
||
381 |
} |
||
382 |
567 |
dx = bytestream2_get_be16(gb); |
|
383 |
567 |
dy = bytestream2_get_be16(gb); |
|
384 |
567 |
w = bytestream2_get_be16(gb); |
|
385 |
567 |
h = bytestream2_get_be16(gb); |
|
386 |
567 |
enc = bytestream2_get_be32(gb); |
|
387 |
✓✗✗✓ |
567 |
if ((dx + w > c->width) || (dy + h > c->height)) { |
388 |
av_log(avctx, AV_LOG_ERROR, |
||
389 |
"Incorrect frame size: %ix%i+%ix%i of %ix%i\n", |
||
390 |
w, h, dx, dy, c->width, c->height); |
||
391 |
return AVERROR_INVALIDDATA; |
||
392 |
} |
||
393 |
567 |
outptr = c->pic->data[0] + dx * c->bpp2 + dy * c->pic->linesize[0]; |
|
394 |
567 |
size_left = bytestream2_get_bytes_left(gb); |
|
395 |
✓✓✓✓ ✓✓✓✓ ✓✗ |
567 |
switch (enc) { |
396 |
16 |
case MAGIC_WMVd: // cursor |
|
397 |
✗✓ | 16 |
if (w*(int64_t)h*c->bpp2 > INT_MAX/2 - 2) { |
398 |
av_log(avctx, AV_LOG_ERROR, "dimensions too large\n"); |
||
399 |
return AVERROR_INVALIDDATA; |
||
400 |
} |
||
401 |
✗✓ | 16 |
if (size_left < 2 + w * h * c->bpp2 * 2) { |
402 |
av_log(avctx, AV_LOG_ERROR, |
||
403 |
"Premature end of data! (need %i got %i)\n", |
||
404 |
2 + w * h * c->bpp2 * 2, size_left); |
||
405 |
return AVERROR_INVALIDDATA; |
||
406 |
} |
||
407 |
16 |
bytestream2_skip(gb, 2); |
|
408 |
16 |
c->cur_w = w; |
|
409 |
16 |
c->cur_h = h; |
|
410 |
16 |
c->cur_hx = dx; |
|
411 |
16 |
c->cur_hy = dy; |
|
412 |
✓✗✗✓ |
16 |
if ((c->cur_hx > c->cur_w) || (c->cur_hy > c->cur_h)) { |
413 |
av_log(avctx, AV_LOG_ERROR, |
||
414 |
"Cursor hot spot is not in image: " |
||
415 |
"%ix%i of %ix%i cursor size\n", |
||
416 |
c->cur_hx, c->cur_hy, c->cur_w, c->cur_h); |
||
417 |
c->cur_hx = c->cur_hy = 0; |
||
418 |
} |
||
419 |
✗✓ | 16 |
if (c->cur_w * c->cur_h >= INT_MAX / c->bpp2) { |
420 |
reset_buffers(c); |
||
421 |
return AVERROR(EINVAL); |
||
422 |
} else { |
||
423 |
16 |
int screen_size = c->cur_w * c->cur_h * c->bpp2; |
|
424 |
✓✗✓✗ |
32 |
if ((ret = av_reallocp(&c->curbits, screen_size)) < 0 || |
425 |
✗✓ | 32 |
(ret = av_reallocp(&c->curmask, screen_size)) < 0 || |
426 |
16 |
(ret = av_reallocp(&c->screendta, screen_size)) < 0) { |
|
427 |
reset_buffers(c); |
||
428 |
return ret; |
||
429 |
} |
||
430 |
} |
||
431 |
16 |
load_cursor(c); |
|
432 |
16 |
break; |
|
433 |
35 |
case MAGIC_WMVe: // unknown |
|
434 |
35 |
bytestream2_skip(gb, 2); |
|
435 |
35 |
break; |
|
436 |
29 |
case MAGIC_WMVf: // update cursor position |
|
437 |
29 |
c->cur_x = dx - c->cur_hx; |
|
438 |
29 |
c->cur_y = dy - c->cur_hy; |
|
439 |
29 |
break; |
|
440 |
4 |
case MAGIC_WMVg: // unknown |
|
441 |
4 |
bytestream2_skip(gb, 10); |
|
442 |
4 |
break; |
|
443 |
4 |
case MAGIC_WMVh: // unknown |
|
444 |
4 |
bytestream2_skip(gb, 4); |
|
445 |
4 |
break; |
|
446 |
4 |
case MAGIC_WMVi: // ServerInitialization struct |
|
447 |
4 |
c->pic->key_frame = 1; |
|
448 |
4 |
c->pic->pict_type = AV_PICTURE_TYPE_I; |
|
449 |
4 |
depth = bytestream2_get_byte(gb); |
|
450 |
✗✓ | 4 |
if (depth != c->bpp) { |
451 |
av_log(avctx, AV_LOG_INFO, |
||
452 |
"Depth mismatch. Container %i bpp, " |
||
453 |
"Frame data: %i bpp\n", |
||
454 |
c->bpp, depth); |
||
455 |
} |
||
456 |
4 |
bytestream2_skip(gb, 1); |
|
457 |
4 |
c->bigendian = bytestream2_get_byte(gb); |
|
458 |
✗✓ | 4 |
if (c->bigendian & (~1)) { |
459 |
av_log(avctx, AV_LOG_INFO, |
||
460 |
"Invalid header: bigendian flag = %i\n", c->bigendian); |
||
461 |
return AVERROR_INVALIDDATA; |
||
462 |
} |
||
463 |
//skip the rest of pixel format data |
||
464 |
4 |
bytestream2_skip(gb, 13); |
|
465 |
4 |
break; |
|
466 |
4 |
case MAGIC_WMVj: // unknown |
|
467 |
4 |
bytestream2_skip(gb, 2); |
|
468 |
4 |
break; |
|
469 |
8 |
case 0x00000000: // raw rectangle data |
|
470 |
✗✓ | 8 |
if (size_left < w * h * c->bpp2) { |
471 |
av_log(avctx, AV_LOG_ERROR, |
||
472 |
"Premature end of data! (need %i got %i)\n", |
||
473 |
w * h * c->bpp2, size_left); |
||
474 |
return AVERROR_INVALIDDATA; |
||
475 |
} |
||
476 |
8 |
paint_raw(outptr, w, h, gb, c->bpp2, c->bigendian, |
|
477 |
8 |
c->pic->linesize[0]); |
|
478 |
8 |
break; |
|
479 |
463 |
case 0x00000005: // HexTile encoded rectangle |
|
480 |
463 |
res = decode_hextile(c, outptr, gb, w, h, c->pic->linesize[0]); |
|
481 |
✓✓ | 463 |
if (res < 0) |
482 |
1 |
return res; |
|
483 |
462 |
break; |
|
484 |
default: |
||
485 |
av_log(avctx, AV_LOG_ERROR, "Unsupported block type 0x%08X\n", enc); |
||
486 |
chunks = 0; // leave chunks decoding loop |
||
487 |
} |
||
488 |
} |
||
489 |
✓✓ | 241 |
if (c->screendta) { |
490 |
int i; |
||
491 |
// save screen data before painting cursor |
||
492 |
49 |
w = c->cur_w; |
|
493 |
✗✓ | 49 |
if (c->width < c->cur_x + w) |
494 |
w = c->width - c->cur_x; |
||
495 |
49 |
h = c->cur_h; |
|
496 |
✗✓ | 49 |
if (c->height < c->cur_y + h) |
497 |
h = c->height - c->cur_y; |
||
498 |
49 |
dx = c->cur_x; |
|
499 |
✗✓ | 49 |
if (dx < 0) { |
500 |
w += dx; |
||
501 |
dx = 0; |
||
502 |
} |
||
503 |
49 |
dy = c->cur_y; |
|
504 |
✗✓ | 49 |
if (dy < 0) { |
505 |
h += dy; |
||
506 |
dy = 0; |
||
507 |
} |
||
508 |
✓✗✓✗ |
49 |
if ((w > 0) && (h > 0)) { |
509 |
49 |
outptr = c->pic->data[0] + dx * c->bpp2 + dy * c->pic->linesize[0]; |
|
510 |
✓✓ | 1617 |
for (i = 0; i < h; i++) { |
511 |
1568 |
memcpy(c->screendta + i * c->cur_w * c->bpp2, outptr, |
|
512 |
1568 |
w * c->bpp2); |
|
513 |
1568 |
outptr += c->pic->linesize[0]; |
|
514 |
} |
||
515 |
49 |
outptr = c->pic->data[0]; |
|
516 |
49 |
put_cursor(outptr, c->pic->linesize[0], c, c->cur_x, c->cur_y); |
|
517 |
} |
||
518 |
} |
||
519 |
241 |
*got_frame = 1; |
|
520 |
✗✓ | 241 |
if ((ret = av_frame_ref(data, c->pic)) < 0) |
521 |
return ret; |
||
522 |
|||
523 |
/* always report that the buffer was completely consumed */ |
||
524 |
241 |
return buf_size; |
|
525 |
} |
||
526 |
|||
527 |
4 |
static av_cold int decode_init(AVCodecContext *avctx) |
|
528 |
{ |
||
529 |
4 |
VmncContext * const c = avctx->priv_data; |
|
530 |
|||
531 |
4 |
c->avctx = avctx; |
|
532 |
4 |
c->width = avctx->width; |
|
533 |
4 |
c->height = avctx->height; |
|
534 |
4 |
c->bpp = avctx->bits_per_coded_sample; |
|
535 |
|||
536 |
✗✓✗✓ ✗ |
4 |
switch (c->bpp) { |
537 |
case 8: |
||
538 |
avctx->pix_fmt = AV_PIX_FMT_PAL8; |
||
539 |
break; |
||
540 |
2 |
case 16: |
|
541 |
2 |
avctx->pix_fmt = AV_PIX_FMT_RGB555; |
|
542 |
2 |
break; |
|
543 |
case 24: |
||
544 |
/* 24 bits is not technically supported, but some clients might |
||
545 |
* mistakenly set it, so let's assume they actually meant 32 bits */ |
||
546 |
c->bpp = 32; |
||
547 |
2 |
case 32: |
|
548 |
2 |
avctx->pix_fmt = AV_PIX_FMT_0RGB32; |
|
549 |
2 |
break; |
|
550 |
default: |
||
551 |
av_log(avctx, AV_LOG_ERROR, "Unsupported bitdepth %i\n", c->bpp); |
||
552 |
return AVERROR_INVALIDDATA; |
||
553 |
} |
||
554 |
4 |
c->bpp2 = c->bpp / 8; |
|
555 |
|||
556 |
4 |
c->pic = av_frame_alloc(); |
|
557 |
✗✓ | 4 |
if (!c->pic) |
558 |
return AVERROR(ENOMEM); |
||
559 |
|||
560 |
4 |
return 0; |
|
561 |
} |
||
562 |
|||
563 |
4 |
static av_cold int decode_end(AVCodecContext *avctx) |
|
564 |
{ |
||
565 |
4 |
VmncContext * const c = avctx->priv_data; |
|
566 |
|||
567 |
4 |
av_frame_free(&c->pic); |
|
568 |
|||
569 |
4 |
av_freep(&c->curbits); |
|
570 |
4 |
av_freep(&c->curmask); |
|
571 |
4 |
av_freep(&c->screendta); |
|
572 |
4 |
return 0; |
|
573 |
} |
||
574 |
|||
575 |
AVCodec ff_vmnc_decoder = { |
||
576 |
.name = "vmnc", |
||
577 |
.long_name = NULL_IF_CONFIG_SMALL("VMware Screen Codec / VMware Video"), |
||
578 |
.type = AVMEDIA_TYPE_VIDEO, |
||
579 |
.id = AV_CODEC_ID_VMNC, |
||
580 |
.priv_data_size = sizeof(VmncContext), |
||
581 |
.init = decode_init, |
||
582 |
.close = decode_end, |
||
583 |
.decode = decode_frame, |
||
584 |
.capabilities = AV_CODEC_CAP_DR1, |
||
585 |
}; |
Generated by: GCOVR (Version 4.2) |