FFmpeg  2.1.1
vmnc.c
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1 /*
2  * VMware Screen Codec (VMnc) decoder
3  * Copyright (c) 2006 Konstantin Shishkov
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  * VMware Screen Codec (VMnc) decoder
25  * As Alex Beregszaszi discovered, this is effectively RFB data dump
26  */
27 
28 #include <stdio.h>
29 #include <stdlib.h>
30 
31 #include "libavutil/common.h"
32 #include "libavutil/intreadwrite.h"
33 #include "avcodec.h"
34 #include "internal.h"
35 #include "bytestream.h"
36 
37 enum EncTypes {
38  MAGIC_WMVd = 0x574D5664,
45 };
46 
48  HT_RAW = 1, // tile is raw
49  HT_BKG = 2, // background color is present
50  HT_FG = 4, // foreground color is present
51  HT_SUB = 8, // subrects are present
52  HT_CLR = 16 // each subrect has own color
53 };
54 
55 /*
56  * Decoder context
57  */
58 typedef struct VmncContext {
61 
62  int bpp;
63  int bpp2;
64  int bigendian;
65  uint8_t pal[768];
66  int width, height;
68 
69  /* cursor data */
70  int cur_w, cur_h;
71  int cur_x, cur_y;
72  int cur_hx, cur_hy;
75 } VmncContext;
76 
77 /* read pixel value from stream */
78 static av_always_inline int vmnc_get_pixel(GetByteContext *gb, int bpp, int be)
79 {
80  switch (bpp * 2 + be) {
81  case 2:
82  case 3:
83  return bytestream2_get_byte(gb);
84  case 4:
85  return bytestream2_get_le16(gb);
86  case 5:
87  return bytestream2_get_be16(gb);
88  case 8:
89  return bytestream2_get_le32(gb);
90  case 9:
91  return bytestream2_get_be32(gb);
92  default: return 0;
93  }
94 }
95 
96 static void load_cursor(VmncContext *c)
97 {
98  int i, j, p;
99  const int bpp = c->bpp2;
100  uint8_t *dst8 = c->curbits;
101  uint16_t *dst16 = (uint16_t *)c->curbits;
102  uint32_t *dst32 = (uint32_t *)c->curbits;
103 
104  for (j = 0; j < c->cur_h; j++) {
105  for (i = 0; i < c->cur_w; i++) {
106  p = vmnc_get_pixel(&c->gb, bpp, c->bigendian);
107  if (bpp == 1)
108  *dst8++ = p;
109  if (bpp == 2)
110  *dst16++ = p;
111  if (bpp == 4)
112  *dst32++ = p;
113  }
114  }
115  dst8 = c->curmask;
116  dst16 = (uint16_t*)c->curmask;
117  dst32 = (uint32_t*)c->curmask;
118  for (j = 0; j < c->cur_h; j++) {
119  for (i = 0; i < c->cur_w; i++) {
120  p = vmnc_get_pixel(&c->gb, bpp, c->bigendian);
121  if (bpp == 1)
122  *dst8++ = p;
123  if (bpp == 2)
124  *dst16++ = p;
125  if (bpp == 4)
126  *dst32++ = p;
127  }
128  }
129 }
130 
131 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  w = c->cur_w;
136  if (c->width < c->cur_x + c->cur_w)
137  w = c->width - c->cur_x;
138  h = c->cur_h;
139  if (c->height < c->cur_y + c->cur_h)
140  h = c->height - c->cur_y;
141  x = c->cur_x;
142  y = c->cur_y;
143  if (x < 0) {
144  w += x;
145  x = 0;
146  }
147  if (y < 0) {
148  h += y;
149  y = 0;
150  }
151 
152  if ((w < 1) || (h < 1))
153  return;
154  dst += x * c->bpp2 + y * stride;
155 
156  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  } 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  } else if (c->bpp2 == 4) {
177  uint32_t *cd = (uint32_t*)c->curbits, *msk = (uint32_t*)c->curmask;
178  uint32_t *dst2;
179  for (j = 0; j < h; j++) {
180  dst2 = (uint32_t*)dst;
181  for (i = 0; i < w; i++)
182  dst2[i] = (dst2[i] & cd[i]) ^ msk[i];
183  msk += c->cur_w;
184  cd += c->cur_w;
185  dst += stride;
186  }
187  }
188 }
189 
190 /* fill rectangle with given color */
191 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  dst += dx * bpp + dy * stride;
197  if (bpp == 1) {
198  for (j = 0; j < h; j++) {
199  memset(dst, color, w);
200  dst += stride;
201  }
202  } else if (bpp == 2) {
203  uint16_t *dst2;
204  for (j = 0; j < h; j++) {
205  dst2 = (uint16_t*)dst;
206  for (i = 0; i < w; i++)
207  *dst2++ = color;
208  dst += stride;
209  }
210  } else if (bpp == 4) {
211  uint32_t *dst2;
212  for (j = 0; j < h; j++) {
213  dst2 = (uint32_t*)dst;
214  for (i = 0; i < w; i++)
215  dst2[i] = color;
216  dst += stride;
217  }
218  }
219 }
220 
221 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  for (j = 0; j < h; j++) {
227  for (i = 0; i < w; i++) {
228  p = vmnc_get_pixel(gb, bpp, be);
229  switch (bpp) {
230  case 1:
231  dst[i] = p;
232  break;
233  case 2:
234  ((uint16_t*)dst)[i] = p;
235  break;
236  case 4:
237  ((uint32_t*)dst)[i] = p;
238  break;
239  }
240  }
241  dst += stride;
242  }
243 }
244 
246  int w, int h, int stride)
247 {
248  int i, j, k;
249  int bg = 0, fg = 0, rects, color, flags, xy, wh;
250  const int bpp = c->bpp2;
251  uint8_t *dst2;
252  int bw = 16, bh = 16;
253 
254  for (j = 0; j < h; j += 16) {
255  dst2 = dst;
256  bw = 16;
257  if (j + 16 > h)
258  bh = h - j;
259  for (i = 0; i < w; i += 16, dst2 += 16 * bpp) {
260  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  if (i + 16 > w)
265  bw = w - i;
266  flags = bytestream2_get_byte(gb);
267  if (flags & HT_RAW) {
268  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  paint_raw(dst2, bw, bh, gb, bpp, c->bigendian, stride);
273  } else {
274  if (flags & HT_BKG)
275  bg = vmnc_get_pixel(gb, bpp, c->bigendian);
276  if (flags & HT_FG)
277  fg = vmnc_get_pixel(gb, bpp, c->bigendian);
278  rects = 0;
279  if (flags & HT_SUB)
280  rects = bytestream2_get_byte(gb);
281  color = !!(flags & HT_CLR);
282 
283  paint_rect(dst2, 0, 0, bw, bh, bg, bpp, stride);
284 
285  if (bytestream2_get_bytes_left(gb) < rects * (color * bpp + 2)) {
286  av_log(c->avctx, AV_LOG_ERROR, "Premature end of data!\n");
287  return AVERROR_INVALIDDATA;
288  }
289  for (k = 0; k < rects; k++) {
290  if (color)
291  fg = vmnc_get_pixel(gb, bpp, c->bigendian);
292  xy = bytestream2_get_byte(gb);
293  wh = bytestream2_get_byte(gb);
294  paint_rect(dst2, xy >> 4, xy & 0xF,
295  (wh>>4)+1, (wh & 0xF)+1, fg, bpp, stride);
296  }
297  }
298  }
299  dst += stride * 16;
300  }
301  return 0;
302 }
303 
305 {
306  av_freep(&c->curbits);
307  av_freep(&c->curmask);
308  av_freep(&c->screendta);
309  c->cur_w = c->cur_h = 0;
310  c->cur_hx = c->cur_hy = 0;
311 
312 }
313 
314 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
315  AVPacket *avpkt)
316 {
317  const uint8_t *buf = avpkt->data;
318  int buf_size = avpkt->size;
319  VmncContext * const c = avctx->priv_data;
320  GetByteContext *gb = &c->gb;
321  uint8_t *outptr;
322  int dx, dy, w, h, depth, enc, chunks, res, size_left, ret;
323  AVFrame *frame = c->frame;
324 
325  if ((ret = ff_reget_buffer(avctx, frame)) < 0)
326  return ret;
327 
328  bytestream2_init(gb, buf, buf_size);
329 
330  frame->key_frame = 0;
331  frame->pict_type = AV_PICTURE_TYPE_P;
332 
333  // restore screen after cursor
334  if (c->screendta) {
335  int i;
336  w = c->cur_w;
337  if (c->width < c->cur_x + w)
338  w = c->width - c->cur_x;
339  h = c->cur_h;
340  if (c->height < c->cur_y + h)
341  h = c->height - c->cur_y;
342  dx = c->cur_x;
343  if (dx < 0) {
344  w += dx;
345  dx = 0;
346  }
347  dy = c->cur_y;
348  if (dy < 0) {
349  h += dy;
350  dy = 0;
351  }
352  if ((w > 0) && (h > 0)) {
353  outptr = frame->data[0] + dx * c->bpp2 + dy * frame->linesize[0];
354  for (i = 0; i < h; i++) {
355  memcpy(outptr, c->screendta + i * c->cur_w * c->bpp2,
356  w * c->bpp2);
357  outptr += frame->linesize[0];
358  }
359  }
360  }
361  bytestream2_skip(gb, 2);
362  chunks = bytestream2_get_be16(gb);
363  while (chunks--) {
364  if (bytestream2_get_bytes_left(gb) < 12) {
365  av_log(avctx, AV_LOG_ERROR, "Premature end of data!\n");
366  return -1;
367  }
368  dx = bytestream2_get_be16(gb);
369  dy = bytestream2_get_be16(gb);
370  w = bytestream2_get_be16(gb);
371  h = bytestream2_get_be16(gb);
372  enc = bytestream2_get_be32(gb);
373  outptr = frame->data[0] + dx * c->bpp2 + dy * frame->linesize[0];
374  size_left = bytestream2_get_bytes_left(gb);
375  switch (enc) {
376  case MAGIC_WMVd: // cursor
377  if (w*(int64_t)h*c->bpp2 > INT_MAX/2 - 2) {
378  av_log(avctx, AV_LOG_ERROR, "dimensions too large\n");
379  return AVERROR_INVALIDDATA;
380  }
381  if (size_left < 2 + w * h * c->bpp2 * 2) {
382  av_log(avctx, AV_LOG_ERROR,
383  "Premature end of data! (need %i got %i)\n",
384  2 + w * h * c->bpp2 * 2, size_left);
385  return AVERROR_INVALIDDATA;
386  }
387  bytestream2_skip(gb, 2);
388  c->cur_w = w;
389  c->cur_h = h;
390  c->cur_hx = dx;
391  c->cur_hy = dy;
392  if ((c->cur_hx > c->cur_w) || (c->cur_hy > c->cur_h)) {
393  av_log(avctx, AV_LOG_ERROR,
394  "Cursor hot spot is not in image: "
395  "%ix%i of %ix%i cursor size\n",
396  c->cur_hx, c->cur_hy, c->cur_w, c->cur_h);
397  c->cur_hx = c->cur_hy = 0;
398  }
399  if (c->cur_w * c->cur_h >= INT_MAX / c->bpp2) {
400  reset_buffers(c);
401  return AVERROR(EINVAL);
402  } else {
403  int screen_size = c->cur_w * c->cur_h * c->bpp2;
404  if ((ret = av_reallocp(&c->curbits, screen_size)) < 0 ||
405  (ret = av_reallocp(&c->curmask, screen_size)) < 0 ||
406  (ret = av_reallocp(&c->screendta, screen_size)) < 0) {
407  reset_buffers(c);
408  return ret;
409  }
410  }
411  load_cursor(c);
412  break;
413  case MAGIC_WMVe: // unknown
414  bytestream2_skip(gb, 2);
415  break;
416  case MAGIC_WMVf: // update cursor position
417  c->cur_x = dx - c->cur_hx;
418  c->cur_y = dy - c->cur_hy;
419  break;
420  case MAGIC_WMVg: // unknown
421  bytestream2_skip(gb, 10);
422  break;
423  case MAGIC_WMVh: // unknown
424  bytestream2_skip(gb, 4);
425  break;
426  case MAGIC_WMVi: // ServerInitialization struct
427  frame->key_frame = 1;
428  frame->pict_type = AV_PICTURE_TYPE_I;
429  depth = bytestream2_get_byte(gb);
430  if (depth != c->bpp) {
431  av_log(avctx, AV_LOG_INFO,
432  "Depth mismatch. Container %i bpp, "
433  "Frame data: %i bpp\n",
434  c->bpp, depth);
435  }
436  bytestream2_skip(gb, 1);
437  c->bigendian = bytestream2_get_byte(gb);
438  if (c->bigendian & (~1)) {
439  av_log(avctx, AV_LOG_INFO,
440  "Invalid header: bigendian flag = %i\n", c->bigendian);
441  return AVERROR_INVALIDDATA;
442  }
443  //skip the rest of pixel format data
444  bytestream2_skip(gb, 13);
445  break;
446  case MAGIC_WMVj: // unknown
447  bytestream2_skip(gb, 2);
448  break;
449  case 0x00000000: // raw rectangle data
450  if ((dx + w > c->width) || (dy + h > c->height)) {
451  av_log(avctx, AV_LOG_ERROR,
452  "Incorrect frame size: %ix%i+%ix%i of %ix%i\n",
453  w, h, dx, dy, c->width, c->height);
454  return AVERROR_INVALIDDATA;
455  }
456  if (size_left < w * h * c->bpp2) {
457  av_log(avctx, AV_LOG_ERROR,
458  "Premature end of data! (need %i got %i)\n",
459  w * h * c->bpp2, size_left);
460  return AVERROR_INVALIDDATA;
461  }
462  paint_raw(outptr, w, h, gb, c->bpp2, c->bigendian,
463  frame->linesize[0]);
464  break;
465  case 0x00000005: // HexTile encoded rectangle
466  if ((dx + w > c->width) || (dy + h > c->height)) {
467  av_log(avctx, AV_LOG_ERROR,
468  "Incorrect frame size: %ix%i+%ix%i of %ix%i\n",
469  w, h, dx, dy, c->width, c->height);
470  return AVERROR_INVALIDDATA;
471  }
472  res = decode_hextile(c, outptr, gb, w, h, frame->linesize[0]);
473  if (res < 0)
474  return res;
475  break;
476  default:
477  av_log(avctx, AV_LOG_ERROR, "Unsupported block type 0x%08X\n", enc);
478  chunks = 0; // leave chunks decoding loop
479  }
480  }
481  if (c->screendta) {
482  int i;
483  // save screen data before painting cursor
484  w = c->cur_w;
485  if (c->width < c->cur_x + w)
486  w = c->width - c->cur_x;
487  h = c->cur_h;
488  if (c->height < c->cur_y + h)
489  h = c->height - c->cur_y;
490  dx = c->cur_x;
491  if (dx < 0) {
492  w += dx;
493  dx = 0;
494  }
495  dy = c->cur_y;
496  if (dy < 0) {
497  h += dy;
498  dy = 0;
499  }
500  if ((w > 0) && (h > 0)) {
501  outptr = frame->data[0] + dx * c->bpp2 + dy * frame->linesize[0];
502  for (i = 0; i < h; i++) {
503  memcpy(c->screendta + i * c->cur_w * c->bpp2, outptr,
504  w * c->bpp2);
505  outptr += frame->linesize[0];
506  }
507  outptr = frame->data[0];
508  put_cursor(outptr, frame->linesize[0], c, c->cur_x, c->cur_y);
509  }
510  }
511  *got_frame = 1;
512  if ((ret = av_frame_ref(data, frame)) < 0)
513  return ret;
514 
515  /* always report that the buffer was completely consumed */
516  return buf_size;
517 }
518 
520 {
521  VmncContext * const c = avctx->priv_data;
522 
523  c->avctx = avctx;
524  c->width = avctx->width;
525  c->height = avctx->height;
526  c->bpp = avctx->bits_per_coded_sample;
527  c->bpp2 = c->bpp / 8;
528 
529  switch (c->bpp) {
530  case 8:
531  avctx->pix_fmt = AV_PIX_FMT_PAL8;
532  break;
533  case 16:
534  avctx->pix_fmt = AV_PIX_FMT_RGB555;
535  break;
536  case 32:
537  avctx->pix_fmt = AV_PIX_FMT_RGB32;
538  break;
539  default:
540  av_log(avctx, AV_LOG_ERROR, "Unsupported bitdepth %i\n", c->bpp);
541  return AVERROR_INVALIDDATA;
542  }
543 
544  c->frame = av_frame_alloc();
545  if (!c->frame)
546  return AVERROR(ENOMEM);
547 
548  return 0;
549 }
550 
552 {
553  VmncContext * const c = avctx->priv_data;
554 
555  av_frame_free(&c->frame);
556 
557  av_freep(&c->curbits);
558  av_freep(&c->curmask);
559  av_freep(&c->screendta);
560  return 0;
561 }
562 
564  .name = "vmnc",
565  .long_name = NULL_IF_CONFIG_SMALL("VMware Screen Codec / VMware Video"),
566  .type = AVMEDIA_TYPE_VIDEO,
567  .id = AV_CODEC_ID_VMNC,
568  .priv_data_size = sizeof(VmncContext),
569  .init = decode_init,
570  .close = decode_end,
571  .decode = decode_frame,
572  .capabilities = CODEC_CAP_DR1,
573 };
Definition: vmnc.c:52
uint8_t pal[768]
Definition: vmnc.c:65
Definition: vmnc.c:48
This structure describes decoded (raw) audio or video data.
Definition: frame.h:96
Definition: vmnc.c:49
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: vmnc.c:314
#define av_always_inline
Definition: attributes.h:41
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
uint8_t * curbits
Definition: vmnc.c:73
int size
Definition: avcodec.h:1064
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1342
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:131
int stride
Definition: mace.c:144
AVCodec.
Definition: avcodec.h:2922
#define av_cold
Definition: avcodec.h:653
static void put_cursor(uint8_t *dst, int stride, VmncContext *c, int dx, int dy)
Definition: vmnc.c:131
Predicted.
Definition: avcodec.h:2305
int height
Definition: vmnc.c:66
void av_freep(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:234
HexTile_Flags
Definition: vmnc.c:47
static uint8_t * res
Definition: ffhash.c:43
uint8_t
#define AV_PIX_FMT_RGB555
Definition: avcodec.h:4938
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:83
const char * name
Name of the codec implementation.
Definition: avcodec.h:2929
int av_frame_ref(AVFrame *dst, AVFrame *src)
Setup a new reference to the data described by a given frame.
Definition: frame.c:247
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:742
const char data[16]
Definition: mxf.c:68
static av_always_inline void paint_raw(uint8_t *dst, int w, int h, GetByteContext *gb, int bpp, int be, int stride)
Definition: vmnc.c:221
int av_reallocp(void *ptr, size_t size)
Allocate or reallocate a block of memory.
Definition: mem.c:183
static av_always_inline int vmnc_get_pixel(GetByteContext *gb, int bpp, int be)
Definition: vmnc.c:78
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2563
int width
Definition: vmnc.c:66
int bigendian
Definition: vmnc.c:64
static AVFrame * frame
Definition: demuxing.c:51
int cur_x
Definition: vmnc.c:71
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: avcodec.h:4147
GetByteContext gb
Definition: vmnc.c:67
static av_cold int decode_end(AVCodecContext *avctx)
Definition: vmnc.c:551
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:162
EncTypes
Definition: vmnc.c:37
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:151
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:110
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:152
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:123
int cur_w
Definition: vmnc.c:70
Libavcodec external API header.
int depth
Definition: v4l.c:61
int cur_hx
Definition: vmnc.c:72
Definition: vmnc.c:51
int cur_hy
Definition: vmnc.c:72
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
Identical in function to av_frame_make_writable(), except it uses ff_get_buffer() to allocate the buf...
Definition: utils.c:986
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:167
int bpp
Definition: vmnc.c:62
static void load_cursor(VmncContext *c)
Definition: vmnc.c:96
AVFrame * frame
Definition: vmnc.c:60
float y
ret
Definition: avfilter.c:961
int width
picture width / height.
Definition: avcodec.h:1314
AVCodecContext * avctx
Definition: vmnc.c:59
#define AV_PIX_FMT_RGB32
Definition: avcodec.h:4928
Definition: vmnc.c:50
static void reset_buffers(VmncContext *c)
Definition: vmnc.c:304
static int decode_hextile(VmncContext *c, uint8_t *dst, GetByteContext *gb, int w, int h, int stride)
Definition: vmnc.c:245
#define AV_LOG_INFO
Standard information.
Definition: avcodec.h:4158
main external API structure.
Definition: avcodec.h:1146
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:538
void * buf
Definition: avisynth_c.h:594
AVCodec ff_vmnc_decoder
Definition: vmnc.c:563
uint8_t * curmask
Definition: vmnc.c:73
uint8_t * data
Definition: avcodec.h:1063
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:124
static av_always_inline void paint_rect(uint8_t *dst, int dx, int dy, int w, int h, int color, int bpp, int stride)
Definition: vmnc.c:191
void * priv_data
Definition: avcodec.h:1182
static int flags
Definition: cpu.c:45
static av_cold int decode_init(AVCodecContext *avctx)
Definition: vmnc.c:519
int cur_h
Definition: vmnc.c:70
common internal api header.
uint8_t * screendta
Definition: vmnc.c:74
static double c[64]
#define AVERROR_INVALIDDATA
int key_frame
1 -&gt; keyframe, 0-&gt; not
Definition: frame.h:162
#define AVERROR(e)
static int decode(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: crystalhd.c:868
8 bit with PIX_FMT_RGB32 palette
Definition: avcodec.h:4545
int bpp2
Definition: vmnc.c:63
This structure stores compressed data.
Definition: avcodec.h:1040
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:107
int cur_y
Definition: vmnc.c:71