Line |
Branch |
Exec |
Source |
1 |
|
|
/* |
2 |
|
|
* RemotelyAnywhere Screen Capture decoder |
3 |
|
|
* |
4 |
|
|
* Copyright (c) 2018 Paul B Mahol |
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 |
|
|
#include <stdio.h> |
24 |
|
|
#include <string.h> |
25 |
|
|
|
26 |
|
|
#include "libavutil/opt.h" |
27 |
|
|
|
28 |
|
|
#include "avcodec.h" |
29 |
|
|
#include "bytestream.h" |
30 |
|
|
#include "codec_internal.h" |
31 |
|
|
#include "decode.h" |
32 |
|
|
#include "zlib_wrapper.h" |
33 |
|
|
|
34 |
|
|
#include <zlib.h> |
35 |
|
|
|
36 |
|
|
#define KBND MKTAG('K', 'B', 'N', 'D') |
37 |
|
|
#define FINT MKTAG('F', 'I', 'N', 'T') |
38 |
|
|
#define INIT MKTAG('I', 'N', 'I', 'T') |
39 |
|
|
#define BNDL MKTAG('B', 'N', 'D', 'L') |
40 |
|
|
#define KFRM MKTAG('K', 'F', 'R', 'M') |
41 |
|
|
#define DLTA MKTAG('D', 'L', 'T', 'A') |
42 |
|
|
#define MOUS MKTAG('M', 'O', 'U', 'S') |
43 |
|
|
#define MPOS MKTAG('M', 'P', 'O', 'S') |
44 |
|
|
#define MOVE MKTAG('M', 'O', 'V', 'E') |
45 |
|
|
#define EMPT MKTAG('E', 'M', 'P', 'T') |
46 |
|
|
|
47 |
|
|
typedef struct RASCContext { |
48 |
|
|
AVClass *class; |
49 |
|
|
int skip_cursor; |
50 |
|
|
GetByteContext gb; |
51 |
|
|
uint8_t *delta; |
52 |
|
|
int delta_size; |
53 |
|
|
uint8_t *cursor; |
54 |
|
|
int cursor_size; |
55 |
|
|
unsigned cursor_w; |
56 |
|
|
unsigned cursor_h; |
57 |
|
|
unsigned cursor_x; |
58 |
|
|
unsigned cursor_y; |
59 |
|
|
int stride; |
60 |
|
|
int bpp; |
61 |
|
|
AVFrame *frame; |
62 |
|
|
AVFrame *frame1; |
63 |
|
|
AVFrame *frame2; |
64 |
|
|
FFZStream zstream; |
65 |
|
|
} RASCContext; |
66 |
|
|
|
67 |
|
✗ |
static void clear_plane(AVCodecContext *avctx, AVFrame *frame) |
68 |
|
|
{ |
69 |
|
✗ |
RASCContext *s = avctx->priv_data; |
70 |
|
✗ |
uint8_t *dst = frame->data[0]; |
71 |
|
|
|
72 |
|
✗ |
if (!dst) |
73 |
|
✗ |
return; |
74 |
|
|
|
75 |
|
✗ |
for (int y = 0; y < avctx->height; y++) { |
76 |
|
✗ |
memset(dst, 0, avctx->width * s->bpp); |
77 |
|
✗ |
dst += frame->linesize[0]; |
78 |
|
|
} |
79 |
|
|
} |
80 |
|
|
|
81 |
|
✗ |
static void copy_plane(AVCodecContext *avctx, AVFrame *src, AVFrame *dst) |
82 |
|
|
{ |
83 |
|
✗ |
RASCContext *s = avctx->priv_data; |
84 |
|
✗ |
uint8_t *srcp = src->data[0]; |
85 |
|
✗ |
uint8_t *dstp = dst->data[0]; |
86 |
|
|
|
87 |
|
✗ |
for (int y = 0; y < avctx->height; y++) { |
88 |
|
✗ |
memcpy(dstp, srcp, s->stride); |
89 |
|
✗ |
srcp += src->linesize[0]; |
90 |
|
✗ |
dstp += dst->linesize[0]; |
91 |
|
|
} |
92 |
|
✗ |
} |
93 |
|
|
|
94 |
|
✗ |
static int init_frames(AVCodecContext *avctx) |
95 |
|
|
{ |
96 |
|
✗ |
RASCContext *s = avctx->priv_data; |
97 |
|
|
int ret; |
98 |
|
|
|
99 |
|
✗ |
av_frame_unref(s->frame1); |
100 |
|
✗ |
av_frame_unref(s->frame2); |
101 |
|
✗ |
if ((ret = ff_get_buffer(avctx, s->frame1, 0)) < 0) |
102 |
|
✗ |
return ret; |
103 |
|
|
|
104 |
|
✗ |
if ((ret = ff_get_buffer(avctx, s->frame2, 0)) < 0) |
105 |
|
✗ |
return ret; |
106 |
|
|
|
107 |
|
✗ |
clear_plane(avctx, s->frame2); |
108 |
|
✗ |
clear_plane(avctx, s->frame1); |
109 |
|
|
|
110 |
|
✗ |
return 0; |
111 |
|
|
} |
112 |
|
|
|
113 |
|
✗ |
static int decode_fint(AVCodecContext *avctx, |
114 |
|
|
const AVPacket *avpkt, unsigned size) |
115 |
|
|
{ |
116 |
|
✗ |
RASCContext *s = avctx->priv_data; |
117 |
|
✗ |
GetByteContext *gb = &s->gb; |
118 |
|
|
unsigned w, h, fmt; |
119 |
|
|
int ret; |
120 |
|
|
|
121 |
|
✗ |
if (bytestream2_peek_le32(gb) != 0x65) { |
122 |
|
✗ |
if (!s->frame2->data[0] || !s->frame1->data[0]) |
123 |
|
✗ |
return AVERROR_INVALIDDATA; |
124 |
|
|
|
125 |
|
✗ |
clear_plane(avctx, s->frame2); |
126 |
|
✗ |
clear_plane(avctx, s->frame1); |
127 |
|
✗ |
return 0; |
128 |
|
|
} |
129 |
|
✗ |
if (bytestream2_get_bytes_left(gb) < 72) |
130 |
|
✗ |
return AVERROR_INVALIDDATA; |
131 |
|
|
|
132 |
|
✗ |
bytestream2_skip(gb, 8); |
133 |
|
✗ |
w = bytestream2_get_le32(gb); |
134 |
|
✗ |
h = bytestream2_get_le32(gb); |
135 |
|
✗ |
bytestream2_skip(gb, 30); |
136 |
|
✗ |
fmt = bytestream2_get_le16(gb); |
137 |
|
✗ |
bytestream2_skip(gb, 24); |
138 |
|
|
|
139 |
|
✗ |
switch (fmt) { |
140 |
|
✗ |
case 8: s->stride = FFALIGN(w, 4); |
141 |
|
✗ |
s->bpp = 1; |
142 |
|
✗ |
fmt = AV_PIX_FMT_PAL8; break; |
143 |
|
✗ |
case 16: s->stride = w * 2; |
144 |
|
✗ |
s->bpp = 2; |
145 |
|
✗ |
fmt = AV_PIX_FMT_RGB555LE; break; |
146 |
|
✗ |
case 32: s->stride = w * 4; |
147 |
|
✗ |
s->bpp = 4; |
148 |
|
✗ |
fmt = AV_PIX_FMT_BGR0; break; |
149 |
|
✗ |
default: return AVERROR_INVALIDDATA; |
150 |
|
|
} |
151 |
|
|
|
152 |
|
✗ |
ret = ff_set_dimensions(avctx, w, h); |
153 |
|
✗ |
if (ret < 0) |
154 |
|
✗ |
return ret; |
155 |
|
✗ |
avctx->width = w; |
156 |
|
✗ |
avctx->height = h; |
157 |
|
✗ |
avctx->pix_fmt = fmt; |
158 |
|
|
|
159 |
|
✗ |
ret = init_frames(avctx); |
160 |
|
✗ |
if (ret < 0) |
161 |
|
✗ |
return ret; |
162 |
|
|
|
163 |
|
✗ |
if (avctx->pix_fmt == AV_PIX_FMT_PAL8) { |
164 |
|
✗ |
uint32_t *pal = (uint32_t *)s->frame2->data[1]; |
165 |
|
|
|
166 |
|
✗ |
for (int i = 0; i < 256; i++) |
167 |
|
✗ |
pal[i] = bytestream2_get_le32(gb) | 0xFF000000u; |
168 |
|
|
} |
169 |
|
|
|
170 |
|
✗ |
return 0; |
171 |
|
|
} |
172 |
|
|
|
173 |
|
✗ |
static int decode_zlib(AVCodecContext *avctx, const AVPacket *avpkt, |
174 |
|
|
unsigned size, unsigned uncompressed_size) |
175 |
|
|
{ |
176 |
|
✗ |
RASCContext *s = avctx->priv_data; |
177 |
|
✗ |
z_stream *const zstream = &s->zstream.zstream; |
178 |
|
✗ |
GetByteContext *gb = &s->gb; |
179 |
|
|
int zret; |
180 |
|
|
|
181 |
|
✗ |
zret = inflateReset(zstream); |
182 |
|
✗ |
if (zret != Z_OK) { |
183 |
|
✗ |
av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret); |
184 |
|
✗ |
return AVERROR_EXTERNAL; |
185 |
|
|
} |
186 |
|
|
|
187 |
|
✗ |
av_fast_padded_malloc(&s->delta, &s->delta_size, uncompressed_size); |
188 |
|
✗ |
if (!s->delta) |
189 |
|
✗ |
return AVERROR(ENOMEM); |
190 |
|
|
|
191 |
|
✗ |
zstream->next_in = avpkt->data + bytestream2_tell(gb); |
192 |
|
✗ |
zstream->avail_in = FFMIN(size, bytestream2_get_bytes_left(gb)); |
193 |
|
|
|
194 |
|
✗ |
zstream->next_out = s->delta; |
195 |
|
✗ |
zstream->avail_out = s->delta_size; |
196 |
|
|
|
197 |
|
✗ |
zret = inflate(zstream, Z_FINISH); |
198 |
|
✗ |
if (zret != Z_STREAM_END) { |
199 |
|
✗ |
av_log(avctx, AV_LOG_ERROR, |
200 |
|
|
"Inflate failed with return code: %d.\n", zret); |
201 |
|
✗ |
return AVERROR_INVALIDDATA; |
202 |
|
|
} |
203 |
|
|
|
204 |
|
✗ |
return 0; |
205 |
|
|
} |
206 |
|
|
|
207 |
|
✗ |
static int decode_move(AVCodecContext *avctx, |
208 |
|
|
const AVPacket *avpkt, unsigned size) |
209 |
|
|
{ |
210 |
|
✗ |
RASCContext *s = avctx->priv_data; |
211 |
|
✗ |
GetByteContext *gb = &s->gb; |
212 |
|
|
GetByteContext mc; |
213 |
|
|
unsigned pos, compression, nb_moves; |
214 |
|
|
unsigned uncompressed_size; |
215 |
|
|
int ret; |
216 |
|
|
|
217 |
|
✗ |
pos = bytestream2_tell(gb); |
218 |
|
✗ |
bytestream2_skip(gb, 8); |
219 |
|
✗ |
nb_moves = bytestream2_get_le32(gb); |
220 |
|
✗ |
bytestream2_skip(gb, 8); |
221 |
|
✗ |
compression = bytestream2_get_le32(gb); |
222 |
|
|
|
223 |
|
✗ |
if (nb_moves > INT32_MAX / 16 || nb_moves > avctx->width * avctx->height) |
224 |
|
✗ |
return AVERROR_INVALIDDATA; |
225 |
|
|
|
226 |
|
✗ |
uncompressed_size = 16 * nb_moves; |
227 |
|
|
|
228 |
|
✗ |
if (compression == 1) { |
229 |
|
✗ |
ret = decode_zlib(avctx, avpkt, |
230 |
|
✗ |
size - (bytestream2_tell(gb) - pos), |
231 |
|
|
uncompressed_size); |
232 |
|
✗ |
if (ret < 0) |
233 |
|
✗ |
return ret; |
234 |
|
✗ |
bytestream2_init(&mc, s->delta, uncompressed_size); |
235 |
|
✗ |
} else if (compression == 0) { |
236 |
|
✗ |
bytestream2_init(&mc, avpkt->data + bytestream2_tell(gb), |
237 |
|
|
bytestream2_get_bytes_left(gb)); |
238 |
|
✗ |
} else if (compression == 2) { |
239 |
|
✗ |
avpriv_request_sample(avctx, "compression %d", compression); |
240 |
|
✗ |
return AVERROR_PATCHWELCOME; |
241 |
|
|
} else { |
242 |
|
✗ |
return AVERROR_INVALIDDATA; |
243 |
|
|
} |
244 |
|
|
|
245 |
|
✗ |
if (bytestream2_get_bytes_left(&mc) < uncompressed_size) |
246 |
|
✗ |
return AVERROR_INVALIDDATA; |
247 |
|
|
|
248 |
|
✗ |
for (int i = 0; i < nb_moves; i++) { |
249 |
|
|
int type, start_x, start_y, end_x, end_y, mov_x, mov_y; |
250 |
|
|
uint8_t *e2, *b1, *b2; |
251 |
|
|
int w, h; |
252 |
|
|
|
253 |
|
✗ |
type = bytestream2_get_le16(&mc); |
254 |
|
✗ |
start_x = bytestream2_get_le16(&mc); |
255 |
|
✗ |
start_y = bytestream2_get_le16(&mc); |
256 |
|
✗ |
end_x = bytestream2_get_le16(&mc); |
257 |
|
✗ |
end_y = bytestream2_get_le16(&mc); |
258 |
|
✗ |
mov_x = bytestream2_get_le16(&mc); |
259 |
|
✗ |
mov_y = bytestream2_get_le16(&mc); |
260 |
|
✗ |
bytestream2_skip(&mc, 2); |
261 |
|
|
|
262 |
|
✗ |
if (start_x >= avctx->width || start_y >= avctx->height || |
263 |
|
✗ |
end_x >= avctx->width || end_y >= avctx->height || |
264 |
|
✗ |
mov_x >= avctx->width || mov_y >= avctx->height) { |
265 |
|
✗ |
continue; |
266 |
|
|
} |
267 |
|
|
|
268 |
|
✗ |
if (start_x >= end_x || start_y >= end_y) |
269 |
|
✗ |
continue; |
270 |
|
|
|
271 |
|
✗ |
w = end_x - start_x; |
272 |
|
✗ |
h = end_y - start_y; |
273 |
|
|
|
274 |
|
✗ |
if (mov_x + w > avctx->width || mov_y + h > avctx->height) |
275 |
|
✗ |
continue; |
276 |
|
|
|
277 |
|
✗ |
if (!s->frame2->data[0] || !s->frame1->data[0]) |
278 |
|
✗ |
return AVERROR_INVALIDDATA; |
279 |
|
|
|
280 |
|
✗ |
b1 = s->frame1->data[0] + s->frame1->linesize[0] * (start_y + h - 1) + start_x * s->bpp; |
281 |
|
✗ |
b2 = s->frame2->data[0] + s->frame2->linesize[0] * (start_y + h - 1) + start_x * s->bpp; |
282 |
|
✗ |
e2 = s->frame2->data[0] + s->frame2->linesize[0] * (mov_y + h - 1) + mov_x * s->bpp; |
283 |
|
|
|
284 |
|
✗ |
if (type == 2) { |
285 |
|
✗ |
for (int j = 0; j < h; j++) { |
286 |
|
✗ |
memcpy(b1, b2, w * s->bpp); |
287 |
|
✗ |
b1 -= s->frame1->linesize[0]; |
288 |
|
✗ |
b2 -= s->frame2->linesize[0]; |
289 |
|
|
} |
290 |
|
✗ |
} else if (type == 1) { |
291 |
|
✗ |
for (int j = 0; j < h; j++) { |
292 |
|
✗ |
memset(b2, 0, w * s->bpp); |
293 |
|
✗ |
b2 -= s->frame2->linesize[0]; |
294 |
|
|
} |
295 |
|
✗ |
} else if (type == 0) { |
296 |
|
|
uint8_t *buffer; |
297 |
|
|
|
298 |
|
✗ |
av_fast_padded_malloc(&s->delta, &s->delta_size, w * h * s->bpp); |
299 |
|
✗ |
buffer = s->delta; |
300 |
|
✗ |
if (!buffer) |
301 |
|
✗ |
return AVERROR(ENOMEM); |
302 |
|
|
|
303 |
|
✗ |
for (int j = 0; j < h; j++) { |
304 |
|
✗ |
memcpy(buffer + j * w * s->bpp, e2, w * s->bpp); |
305 |
|
✗ |
e2 -= s->frame2->linesize[0]; |
306 |
|
|
} |
307 |
|
|
|
308 |
|
✗ |
for (int j = 0; j < h; j++) { |
309 |
|
✗ |
memcpy(b2, buffer + j * w * s->bpp, w * s->bpp); |
310 |
|
✗ |
b2 -= s->frame2->linesize[0]; |
311 |
|
|
} |
312 |
|
|
} else { |
313 |
|
✗ |
return AVERROR_INVALIDDATA; |
314 |
|
|
} |
315 |
|
|
} |
316 |
|
|
|
317 |
|
✗ |
bytestream2_skip(gb, size - (bytestream2_tell(gb) - pos)); |
318 |
|
|
|
319 |
|
✗ |
return 0; |
320 |
|
|
} |
321 |
|
|
|
322 |
|
|
#define NEXT_LINE \ |
323 |
|
|
if (cx >= w * s->bpp) { \ |
324 |
|
|
cx = 0; \ |
325 |
|
|
cy--; \ |
326 |
|
|
b1 -= s->frame1->linesize[0]; \ |
327 |
|
|
b2 -= s->frame2->linesize[0]; \ |
328 |
|
|
} \ |
329 |
|
|
len--; |
330 |
|
|
|
331 |
|
✗ |
static int decode_dlta(AVCodecContext *avctx, |
332 |
|
|
const AVPacket *avpkt, unsigned size) |
333 |
|
|
{ |
334 |
|
✗ |
RASCContext *s = avctx->priv_data; |
335 |
|
✗ |
GetByteContext *gb = &s->gb; |
336 |
|
|
GetByteContext dc; |
337 |
|
|
unsigned uncompressed_size, pos; |
338 |
|
|
unsigned x, y, w, h; |
339 |
|
|
int ret, cx, cy, compression; |
340 |
|
|
uint8_t *b1, *b2; |
341 |
|
|
|
342 |
|
✗ |
pos = bytestream2_tell(gb); |
343 |
|
✗ |
bytestream2_skip(gb, 12); |
344 |
|
✗ |
uncompressed_size = bytestream2_get_le32(gb); |
345 |
|
✗ |
x = bytestream2_get_le32(gb); |
346 |
|
✗ |
y = bytestream2_get_le32(gb); |
347 |
|
✗ |
w = bytestream2_get_le32(gb); |
348 |
|
✗ |
h = bytestream2_get_le32(gb); |
349 |
|
|
|
350 |
|
✗ |
if (x >= avctx->width || y >= avctx->height || |
351 |
|
✗ |
w > avctx->width || h > avctx->height) |
352 |
|
✗ |
return AVERROR_INVALIDDATA; |
353 |
|
|
|
354 |
|
✗ |
if (x + w > avctx->width || y + h > avctx->height) |
355 |
|
✗ |
return AVERROR_INVALIDDATA; |
356 |
|
|
|
357 |
|
✗ |
bytestream2_skip(gb, 4); |
358 |
|
✗ |
compression = bytestream2_get_le32(gb); |
359 |
|
|
|
360 |
|
✗ |
if (compression == 1) { |
361 |
|
✗ |
if (w * h * s->bpp * 3 < uncompressed_size) |
362 |
|
✗ |
return AVERROR_INVALIDDATA; |
363 |
|
✗ |
ret = decode_zlib(avctx, avpkt, size, uncompressed_size); |
364 |
|
✗ |
if (ret < 0) |
365 |
|
✗ |
return ret; |
366 |
|
✗ |
bytestream2_init(&dc, s->delta, uncompressed_size); |
367 |
|
✗ |
} else if (compression == 0) { |
368 |
|
✗ |
if (bytestream2_get_bytes_left(gb) < uncompressed_size) |
369 |
|
✗ |
return AVERROR_INVALIDDATA; |
370 |
|
✗ |
bytestream2_init(&dc, avpkt->data + bytestream2_tell(gb), |
371 |
|
|
uncompressed_size); |
372 |
|
✗ |
} else if (compression == 2) { |
373 |
|
✗ |
avpriv_request_sample(avctx, "compression %d", compression); |
374 |
|
✗ |
return AVERROR_PATCHWELCOME; |
375 |
|
|
} else { |
376 |
|
✗ |
return AVERROR_INVALIDDATA; |
377 |
|
|
} |
378 |
|
|
|
379 |
|
✗ |
if (!s->frame2->data[0] || !s->frame1->data[0]) |
380 |
|
✗ |
return AVERROR_INVALIDDATA; |
381 |
|
|
|
382 |
|
✗ |
b1 = s->frame1->data[0] + s->frame1->linesize[0] * (int)(y + h - 1) + ((int)x) * s->bpp; |
383 |
|
✗ |
b2 = s->frame2->data[0] + s->frame2->linesize[0] * (int)(y + h - 1) + ((int)x) * s->bpp; |
384 |
|
✗ |
cx = 0, cy = h; |
385 |
|
✗ |
while (bytestream2_get_bytes_left(&dc) > 0) { |
386 |
|
✗ |
int type = bytestream2_get_byte(&dc); |
387 |
|
✗ |
int len = bytestream2_get_byte(&dc); |
388 |
|
|
unsigned fill; |
389 |
|
|
|
390 |
|
✗ |
switch (type) { |
391 |
|
✗ |
case 1: |
392 |
|
✗ |
while (len > 0 && cy > 0) { |
393 |
|
✗ |
cx++; |
394 |
|
✗ |
NEXT_LINE |
395 |
|
|
} |
396 |
|
✗ |
break; |
397 |
|
✗ |
case 2: |
398 |
|
✗ |
while (len > 0 && cy > 0) { |
399 |
|
✗ |
int v0 = b1[cx]; |
400 |
|
✗ |
int v1 = b2[cx]; |
401 |
|
|
|
402 |
|
✗ |
b2[cx] = v0; |
403 |
|
✗ |
b1[cx] = v1; |
404 |
|
✗ |
cx++; |
405 |
|
✗ |
NEXT_LINE |
406 |
|
|
} |
407 |
|
✗ |
break; |
408 |
|
✗ |
case 3: |
409 |
|
✗ |
while (len > 0 && cy > 0) { |
410 |
|
✗ |
fill = bytestream2_get_byte(&dc); |
411 |
|
✗ |
b1[cx] = b2[cx]; |
412 |
|
✗ |
b2[cx] = fill; |
413 |
|
✗ |
cx++; |
414 |
|
✗ |
NEXT_LINE |
415 |
|
|
} |
416 |
|
✗ |
break; |
417 |
|
✗ |
case 4: |
418 |
|
✗ |
fill = bytestream2_get_byte(&dc); |
419 |
|
✗ |
while (len > 0 && cy > 0) { |
420 |
|
✗ |
AV_WL32(b1 + cx, AV_RL32(b2 + cx)); |
421 |
|
✗ |
AV_WL32(b2 + cx, fill); |
422 |
|
✗ |
cx++; |
423 |
|
✗ |
NEXT_LINE |
424 |
|
|
} |
425 |
|
✗ |
break; |
426 |
|
✗ |
case 7: |
427 |
|
✗ |
fill = bytestream2_get_le32(&dc); |
428 |
|
✗ |
while (len > 0 && cy > 0) { |
429 |
|
✗ |
AV_WL32(b1 + cx, AV_RL32(b2 + cx)); |
430 |
|
✗ |
AV_WL32(b2 + cx, fill); |
431 |
|
✗ |
cx += 4; |
432 |
|
✗ |
NEXT_LINE |
433 |
|
|
} |
434 |
|
✗ |
break; |
435 |
|
✗ |
case 10: |
436 |
|
✗ |
while (len > 0 && cy > 0) { |
437 |
|
✗ |
cx += 4; |
438 |
|
✗ |
NEXT_LINE |
439 |
|
|
} |
440 |
|
✗ |
break; |
441 |
|
✗ |
case 12: |
442 |
|
✗ |
while (len > 0 && cy > 0) { |
443 |
|
|
unsigned v0, v1; |
444 |
|
|
|
445 |
|
✗ |
v0 = AV_RL32(b2 + cx); |
446 |
|
✗ |
v1 = AV_RL32(b1 + cx); |
447 |
|
✗ |
AV_WL32(b2 + cx, v1); |
448 |
|
✗ |
AV_WL32(b1 + cx, v0); |
449 |
|
✗ |
cx += 4; |
450 |
|
✗ |
NEXT_LINE |
451 |
|
|
} |
452 |
|
✗ |
break; |
453 |
|
✗ |
case 13: |
454 |
|
✗ |
while (len > 0 && cy > 0) { |
455 |
|
✗ |
fill = bytestream2_get_le32(&dc); |
456 |
|
✗ |
AV_WL32(b1 + cx, AV_RL32(b2 + cx)); |
457 |
|
✗ |
AV_WL32(b2 + cx, fill); |
458 |
|
✗ |
cx += 4; |
459 |
|
✗ |
NEXT_LINE |
460 |
|
|
} |
461 |
|
✗ |
break; |
462 |
|
✗ |
default: |
463 |
|
✗ |
avpriv_request_sample(avctx, "runlen %d", type); |
464 |
|
✗ |
return AVERROR_INVALIDDATA; |
465 |
|
|
} |
466 |
|
|
} |
467 |
|
|
|
468 |
|
✗ |
bytestream2_skip(gb, size - (bytestream2_tell(gb) - pos)); |
469 |
|
|
|
470 |
|
✗ |
return 0; |
471 |
|
|
} |
472 |
|
|
|
473 |
|
✗ |
static int decode_kfrm(AVCodecContext *avctx, |
474 |
|
|
const AVPacket *avpkt, unsigned size) |
475 |
|
|
{ |
476 |
|
✗ |
RASCContext *s = avctx->priv_data; |
477 |
|
✗ |
z_stream *const zstream = &s->zstream.zstream; |
478 |
|
✗ |
GetByteContext *gb = &s->gb; |
479 |
|
|
uint8_t *dst; |
480 |
|
|
unsigned pos; |
481 |
|
|
int zret, ret; |
482 |
|
|
|
483 |
|
✗ |
pos = bytestream2_tell(gb); |
484 |
|
✗ |
if (bytestream2_peek_le32(gb) == 0x65) { |
485 |
|
✗ |
ret = decode_fint(avctx, avpkt, size); |
486 |
|
✗ |
if (ret < 0) |
487 |
|
✗ |
return ret; |
488 |
|
|
} |
489 |
|
|
|
490 |
|
✗ |
if (!s->frame2->data[0]) |
491 |
|
✗ |
return AVERROR_INVALIDDATA; |
492 |
|
|
|
493 |
|
✗ |
zret = inflateReset(zstream); |
494 |
|
✗ |
if (zret != Z_OK) { |
495 |
|
✗ |
av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret); |
496 |
|
✗ |
return AVERROR_EXTERNAL; |
497 |
|
|
} |
498 |
|
|
|
499 |
|
✗ |
zstream->next_in = avpkt->data + bytestream2_tell(gb); |
500 |
|
✗ |
zstream->avail_in = bytestream2_get_bytes_left(gb); |
501 |
|
|
|
502 |
|
✗ |
dst = s->frame2->data[0] + (avctx->height - 1) * s->frame2->linesize[0]; |
503 |
|
✗ |
for (int i = 0; i < avctx->height; i++) { |
504 |
|
✗ |
zstream->next_out = dst; |
505 |
|
✗ |
zstream->avail_out = s->stride; |
506 |
|
|
|
507 |
|
✗ |
zret = inflate(zstream, Z_SYNC_FLUSH); |
508 |
|
✗ |
if (zret != Z_OK && zret != Z_STREAM_END) { |
509 |
|
✗ |
av_log(avctx, AV_LOG_ERROR, |
510 |
|
|
"Inflate failed with return code: %d.\n", zret); |
511 |
|
✗ |
return AVERROR_INVALIDDATA; |
512 |
|
|
} |
513 |
|
|
|
514 |
|
✗ |
dst -= s->frame2->linesize[0]; |
515 |
|
|
} |
516 |
|
|
|
517 |
|
✗ |
dst = s->frame1->data[0] + (avctx->height - 1) * s->frame1->linesize[0]; |
518 |
|
✗ |
for (int i = 0; i < avctx->height; i++) { |
519 |
|
✗ |
zstream->next_out = dst; |
520 |
|
✗ |
zstream->avail_out = s->stride; |
521 |
|
|
|
522 |
|
✗ |
zret = inflate(zstream, Z_SYNC_FLUSH); |
523 |
|
✗ |
if (zret != Z_OK && zret != Z_STREAM_END) { |
524 |
|
✗ |
av_log(avctx, AV_LOG_ERROR, |
525 |
|
|
"Inflate failed with return code: %d.\n", zret); |
526 |
|
✗ |
return AVERROR_INVALIDDATA; |
527 |
|
|
} |
528 |
|
|
|
529 |
|
✗ |
dst -= s->frame1->linesize[0]; |
530 |
|
|
} |
531 |
|
|
|
532 |
|
✗ |
bytestream2_skip(gb, size - (bytestream2_tell(gb) - pos)); |
533 |
|
|
|
534 |
|
✗ |
return 0; |
535 |
|
|
} |
536 |
|
|
|
537 |
|
✗ |
static int decode_mous(AVCodecContext *avctx, |
538 |
|
|
const AVPacket *avpkt, unsigned size) |
539 |
|
|
{ |
540 |
|
✗ |
RASCContext *s = avctx->priv_data; |
541 |
|
✗ |
GetByteContext *gb = &s->gb; |
542 |
|
|
unsigned w, h, pos, uncompressed_size; |
543 |
|
|
int ret; |
544 |
|
|
|
545 |
|
✗ |
pos = bytestream2_tell(gb); |
546 |
|
✗ |
bytestream2_skip(gb, 8); |
547 |
|
✗ |
w = bytestream2_get_le32(gb); |
548 |
|
✗ |
h = bytestream2_get_le32(gb); |
549 |
|
✗ |
bytestream2_skip(gb, 12); |
550 |
|
✗ |
uncompressed_size = bytestream2_get_le32(gb); |
551 |
|
|
|
552 |
|
✗ |
if (w > avctx->width || h > avctx->height) |
553 |
|
✗ |
return AVERROR_INVALIDDATA; |
554 |
|
|
|
555 |
|
✗ |
if (uncompressed_size != 3 * w * h) |
556 |
|
✗ |
return AVERROR_INVALIDDATA; |
557 |
|
|
|
558 |
|
✗ |
av_fast_padded_malloc(&s->cursor, &s->cursor_size, uncompressed_size); |
559 |
|
✗ |
if (!s->cursor) |
560 |
|
✗ |
return AVERROR(ENOMEM); |
561 |
|
|
|
562 |
|
✗ |
ret = decode_zlib(avctx, avpkt, |
563 |
|
✗ |
size - (bytestream2_tell(gb) - pos), |
564 |
|
|
uncompressed_size); |
565 |
|
✗ |
if (ret < 0) |
566 |
|
✗ |
return ret; |
567 |
|
✗ |
memcpy(s->cursor, s->delta, uncompressed_size); |
568 |
|
|
|
569 |
|
✗ |
bytestream2_skip(gb, size - (bytestream2_tell(gb) - pos)); |
570 |
|
|
|
571 |
|
✗ |
s->cursor_w = w; |
572 |
|
✗ |
s->cursor_h = h; |
573 |
|
|
|
574 |
|
✗ |
return 0; |
575 |
|
|
} |
576 |
|
|
|
577 |
|
✗ |
static int decode_mpos(AVCodecContext *avctx, |
578 |
|
|
const AVPacket *avpkt, unsigned size) |
579 |
|
|
{ |
580 |
|
✗ |
RASCContext *s = avctx->priv_data; |
581 |
|
✗ |
GetByteContext *gb = &s->gb; |
582 |
|
|
unsigned pos; |
583 |
|
|
|
584 |
|
✗ |
pos = bytestream2_tell(gb); |
585 |
|
✗ |
bytestream2_skip(gb, 8); |
586 |
|
✗ |
s->cursor_x = bytestream2_get_le32(gb); |
587 |
|
✗ |
s->cursor_y = bytestream2_get_le32(gb); |
588 |
|
|
|
589 |
|
✗ |
bytestream2_skip(gb, size - (bytestream2_tell(gb) - pos)); |
590 |
|
|
|
591 |
|
✗ |
return 0; |
592 |
|
|
} |
593 |
|
|
|
594 |
|
✗ |
static void draw_cursor(AVCodecContext *avctx) |
595 |
|
|
{ |
596 |
|
✗ |
RASCContext *s = avctx->priv_data; |
597 |
|
|
uint8_t *dst, *pal; |
598 |
|
|
|
599 |
|
✗ |
if (!s->cursor) |
600 |
|
✗ |
return; |
601 |
|
|
|
602 |
|
✗ |
if (s->cursor_x >= avctx->width || s->cursor_y >= avctx->height) |
603 |
|
✗ |
return; |
604 |
|
|
|
605 |
|
✗ |
if (s->cursor_x + s->cursor_w > avctx->width || |
606 |
|
✗ |
s->cursor_y + s->cursor_h > avctx->height) |
607 |
|
✗ |
return; |
608 |
|
|
|
609 |
|
✗ |
if (avctx->pix_fmt == AV_PIX_FMT_PAL8) { |
610 |
|
✗ |
pal = s->frame->data[1]; |
611 |
|
✗ |
for (int i = 0; i < s->cursor_h; i++) { |
612 |
|
✗ |
for (int j = 0; j < s->cursor_w; j++) { |
613 |
|
✗ |
int cr = s->cursor[3 * s->cursor_w * (s->cursor_h - i - 1) + 3 * j + 0]; |
614 |
|
✗ |
int cg = s->cursor[3 * s->cursor_w * (s->cursor_h - i - 1) + 3 * j + 1]; |
615 |
|
✗ |
int cb = s->cursor[3 * s->cursor_w * (s->cursor_h - i - 1) + 3 * j + 2]; |
616 |
|
✗ |
int best = INT_MAX; |
617 |
|
✗ |
int index = 0; |
618 |
|
|
int dist; |
619 |
|
|
|
620 |
|
✗ |
if (cr == s->cursor[0] && cg == s->cursor[1] && cb == s->cursor[2]) |
621 |
|
✗ |
continue; |
622 |
|
|
|
623 |
|
✗ |
dst = s->frame->data[0] + s->frame->linesize[0] * (int)(s->cursor_y + i) + (int)(s->cursor_x + j); |
624 |
|
✗ |
for (int k = 0; k < 256; k++) { |
625 |
|
✗ |
int pr = pal[k * 4 + 0]; |
626 |
|
✗ |
int pg = pal[k * 4 + 1]; |
627 |
|
✗ |
int pb = pal[k * 4 + 2]; |
628 |
|
|
|
629 |
|
✗ |
dist = FFABS(cr - pr) + FFABS(cg - pg) + FFABS(cb - pb); |
630 |
|
✗ |
if (dist < best) { |
631 |
|
✗ |
best = dist; |
632 |
|
✗ |
index = k; |
633 |
|
|
} |
634 |
|
|
} |
635 |
|
✗ |
dst[0] = index; |
636 |
|
|
} |
637 |
|
|
} |
638 |
|
✗ |
} else if (avctx->pix_fmt == AV_PIX_FMT_RGB555LE) { |
639 |
|
✗ |
for (int i = 0; i < s->cursor_h; i++) { |
640 |
|
✗ |
for (int j = 0; j < s->cursor_w; j++) { |
641 |
|
✗ |
int cr = s->cursor[3 * s->cursor_w * (s->cursor_h - i - 1) + 3 * j + 0]; |
642 |
|
✗ |
int cg = s->cursor[3 * s->cursor_w * (s->cursor_h - i - 1) + 3 * j + 1]; |
643 |
|
✗ |
int cb = s->cursor[3 * s->cursor_w * (s->cursor_h - i - 1) + 3 * j + 2]; |
644 |
|
|
|
645 |
|
✗ |
if (cr == s->cursor[0] && cg == s->cursor[1] && cb == s->cursor[2]) |
646 |
|
✗ |
continue; |
647 |
|
|
|
648 |
|
✗ |
cr >>= 3; cg >>=3; cb >>= 3; |
649 |
|
✗ |
dst = s->frame->data[0] + s->frame->linesize[0] * (int)(s->cursor_y + i) + 2 * (s->cursor_x + j); |
650 |
|
✗ |
AV_WL16(dst, cr | cg << 5 | cb << 10); |
651 |
|
|
} |
652 |
|
|
} |
653 |
|
✗ |
} else if (avctx->pix_fmt == AV_PIX_FMT_BGR0) { |
654 |
|
✗ |
for (int i = 0; i < s->cursor_h; i++) { |
655 |
|
✗ |
for (int j = 0; j < s->cursor_w; j++) { |
656 |
|
✗ |
int cr = s->cursor[3 * s->cursor_w * (s->cursor_h - i - 1) + 3 * j + 0]; |
657 |
|
✗ |
int cg = s->cursor[3 * s->cursor_w * (s->cursor_h - i - 1) + 3 * j + 1]; |
658 |
|
✗ |
int cb = s->cursor[3 * s->cursor_w * (s->cursor_h - i - 1) + 3 * j + 2]; |
659 |
|
|
|
660 |
|
✗ |
if (cr == s->cursor[0] && cg == s->cursor[1] && cb == s->cursor[2]) |
661 |
|
✗ |
continue; |
662 |
|
|
|
663 |
|
✗ |
dst = s->frame->data[0] + s->frame->linesize[0] * (int)(s->cursor_y + i) + 4 * (s->cursor_x + j); |
664 |
|
✗ |
dst[0] = cb; |
665 |
|
✗ |
dst[1] = cg; |
666 |
|
✗ |
dst[2] = cr; |
667 |
|
|
} |
668 |
|
|
} |
669 |
|
|
} |
670 |
|
|
} |
671 |
|
|
|
672 |
|
✗ |
static int decode_frame(AVCodecContext *avctx, AVFrame *frame, |
673 |
|
|
int *got_frame, AVPacket *avpkt) |
674 |
|
|
{ |
675 |
|
✗ |
RASCContext *s = avctx->priv_data; |
676 |
|
✗ |
GetByteContext *gb = &s->gb; |
677 |
|
✗ |
int ret, intra = 0; |
678 |
|
|
|
679 |
|
✗ |
bytestream2_init(gb, avpkt->data, avpkt->size); |
680 |
|
|
|
681 |
|
✗ |
if (bytestream2_peek_le32(gb) == EMPT) |
682 |
|
✗ |
return avpkt->size; |
683 |
|
|
|
684 |
|
✗ |
s->frame = frame; |
685 |
|
|
|
686 |
|
✗ |
while (bytestream2_get_bytes_left(gb) > 0) { |
687 |
|
✗ |
unsigned type, size = 0; |
688 |
|
|
|
689 |
|
✗ |
if (bytestream2_get_bytes_left(gb) < 8) |
690 |
|
✗ |
return AVERROR_INVALIDDATA; |
691 |
|
|
|
692 |
|
✗ |
type = bytestream2_get_le32(gb); |
693 |
|
✗ |
if (type == KBND || type == BNDL) { |
694 |
|
✗ |
intra = type == KBND; |
695 |
|
✗ |
type = bytestream2_get_le32(gb); |
696 |
|
|
} |
697 |
|
|
|
698 |
|
✗ |
size = bytestream2_get_le32(gb); |
699 |
|
✗ |
if (bytestream2_get_bytes_left(gb) < size) |
700 |
|
✗ |
return AVERROR_INVALIDDATA; |
701 |
|
|
|
702 |
|
✗ |
switch (type) { |
703 |
|
✗ |
case FINT: |
704 |
|
|
case INIT: |
705 |
|
✗ |
ret = decode_fint(avctx, avpkt, size); |
706 |
|
✗ |
break; |
707 |
|
✗ |
case KFRM: |
708 |
|
✗ |
ret = decode_kfrm(avctx, avpkt, size); |
709 |
|
✗ |
break; |
710 |
|
✗ |
case DLTA: |
711 |
|
✗ |
ret = decode_dlta(avctx, avpkt, size); |
712 |
|
✗ |
break; |
713 |
|
✗ |
case MOVE: |
714 |
|
✗ |
ret = decode_move(avctx, avpkt, size); |
715 |
|
✗ |
break; |
716 |
|
✗ |
case MOUS: |
717 |
|
✗ |
ret = decode_mous(avctx, avpkt, size); |
718 |
|
✗ |
break; |
719 |
|
✗ |
case MPOS: |
720 |
|
✗ |
ret = decode_mpos(avctx, avpkt, size); |
721 |
|
✗ |
break; |
722 |
|
✗ |
default: |
723 |
|
✗ |
bytestream2_skip(gb, size); |
724 |
|
✗ |
ret = 0; |
725 |
|
|
} |
726 |
|
|
|
727 |
|
✗ |
if (ret < 0) |
728 |
|
✗ |
return ret; |
729 |
|
|
} |
730 |
|
|
|
731 |
|
✗ |
if (!s->frame2->data[0] || !s->frame1->data[0]) |
732 |
|
✗ |
return AVERROR_INVALIDDATA; |
733 |
|
|
|
734 |
|
✗ |
if ((ret = ff_get_buffer(avctx, s->frame, 0)) < 0) |
735 |
|
✗ |
return ret; |
736 |
|
|
|
737 |
|
✗ |
copy_plane(avctx, s->frame2, s->frame); |
738 |
|
✗ |
if (avctx->pix_fmt == AV_PIX_FMT_PAL8) |
739 |
|
✗ |
memcpy(s->frame->data[1], s->frame2->data[1], 1024); |
740 |
|
✗ |
if (!s->skip_cursor) |
741 |
|
✗ |
draw_cursor(avctx); |
742 |
|
|
|
743 |
|
✗ |
if (intra) |
744 |
|
✗ |
s->frame->flags |= AV_FRAME_FLAG_KEY; |
745 |
|
|
else |
746 |
|
✗ |
s->frame->flags &= ~AV_FRAME_FLAG_KEY; |
747 |
|
✗ |
s->frame->pict_type = intra ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P; |
748 |
|
|
|
749 |
|
✗ |
*got_frame = 1; |
750 |
|
|
|
751 |
|
✗ |
return avpkt->size; |
752 |
|
|
} |
753 |
|
|
|
754 |
|
✗ |
static av_cold int decode_init(AVCodecContext *avctx) |
755 |
|
|
{ |
756 |
|
✗ |
RASCContext *s = avctx->priv_data; |
757 |
|
|
|
758 |
|
✗ |
s->frame1 = av_frame_alloc(); |
759 |
|
✗ |
s->frame2 = av_frame_alloc(); |
760 |
|
✗ |
if (!s->frame1 || !s->frame2) |
761 |
|
✗ |
return AVERROR(ENOMEM); |
762 |
|
|
|
763 |
|
✗ |
return ff_inflate_init(&s->zstream, avctx); |
764 |
|
|
} |
765 |
|
|
|
766 |
|
✗ |
static av_cold int decode_close(AVCodecContext *avctx) |
767 |
|
|
{ |
768 |
|
✗ |
RASCContext *s = avctx->priv_data; |
769 |
|
|
|
770 |
|
✗ |
av_freep(&s->cursor); |
771 |
|
✗ |
s->cursor_size = 0; |
772 |
|
✗ |
av_freep(&s->delta); |
773 |
|
✗ |
s->delta_size = 0; |
774 |
|
✗ |
av_frame_free(&s->frame1); |
775 |
|
✗ |
av_frame_free(&s->frame2); |
776 |
|
✗ |
ff_inflate_end(&s->zstream); |
777 |
|
|
|
778 |
|
✗ |
return 0; |
779 |
|
|
} |
780 |
|
|
|
781 |
|
✗ |
static void decode_flush(AVCodecContext *avctx) |
782 |
|
|
{ |
783 |
|
✗ |
RASCContext *s = avctx->priv_data; |
784 |
|
|
|
785 |
|
✗ |
clear_plane(avctx, s->frame1); |
786 |
|
✗ |
clear_plane(avctx, s->frame2); |
787 |
|
✗ |
} |
788 |
|
|
|
789 |
|
|
static const AVOption options[] = { |
790 |
|
|
{ "skip_cursor", "skip the cursor", offsetof(RASCContext, skip_cursor), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM }, |
791 |
|
|
{ NULL }, |
792 |
|
|
}; |
793 |
|
|
|
794 |
|
|
static const AVClass rasc_decoder_class = { |
795 |
|
|
.class_name = "rasc decoder", |
796 |
|
|
.item_name = av_default_item_name, |
797 |
|
|
.option = options, |
798 |
|
|
.version = LIBAVUTIL_VERSION_INT, |
799 |
|
|
}; |
800 |
|
|
|
801 |
|
|
const FFCodec ff_rasc_decoder = { |
802 |
|
|
.p.name = "rasc", |
803 |
|
|
CODEC_LONG_NAME("RemotelyAnywhere Screen Capture"), |
804 |
|
|
.p.type = AVMEDIA_TYPE_VIDEO, |
805 |
|
|
.p.id = AV_CODEC_ID_RASC, |
806 |
|
|
.priv_data_size = sizeof(RASCContext), |
807 |
|
|
.init = decode_init, |
808 |
|
|
.close = decode_close, |
809 |
|
|
FF_CODEC_DECODE_CB(decode_frame), |
810 |
|
|
.flush = decode_flush, |
811 |
|
|
.p.capabilities = AV_CODEC_CAP_DR1, |
812 |
|
|
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP, |
813 |
|
|
.p.priv_class = &rasc_decoder_class, |
814 |
|
|
}; |
815 |
|
|
|