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qtrle.c
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1 /*
2  * Quicktime Animation (RLE) Video Decoder
3  * Copyright (C) 2004 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  * QT RLE Video Decoder by Mike Melanson (melanson@pcisys.net)
25  * For more information about the QT RLE format, visit:
26  * http://www.pcisys.net/~melanson/codecs/
27  *
28  * The QT RLE decoder has seven modes of operation:
29  * 1, 2, 4, 8, 16, 24, and 32 bits per pixel. For modes 1, 2, 4, and 8
30  * the decoder outputs PAL8 colorspace data. 16-bit data yields RGB555
31  * data. 24-bit data is RGB24 and 32-bit data is RGB32.
32  */
33 
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <string.h>
37 
38 #include "avcodec.h"
39 #include "bytestream.h"
40 #include "internal.h"
41 
42 typedef struct QtrleContext {
45 
47  uint32_t pal[256];
48 } QtrleContext;
49 
50 #define CHECK_PIXEL_PTR(n) \
51  if ((pixel_ptr + n > pixel_limit) || (pixel_ptr + n < 0)) { \
52  av_log (s->avctx, AV_LOG_ERROR, "Problem: pixel_ptr = %d, pixel_limit = %d\n",\
53  pixel_ptr + n, pixel_limit); \
54  return; \
55  } \
56 
57 static void qtrle_decode_1bpp(QtrleContext *s, int row_ptr, int lines_to_change)
58 {
59  int rle_code;
60  int pixel_ptr;
61  int row_inc = s->frame->linesize[0];
62  uint8_t pi0, pi1; /* 2 8-pixel values */
63  uint8_t *rgb = s->frame->data[0];
64  int pixel_limit = s->frame->linesize[0] * s->avctx->height;
65  int skip;
66  /* skip & 0x80 appears to mean 'start a new line', which can be interpreted
67  * as 'go to next line' during the decoding of a frame but is 'go to first
68  * line' at the beginning. Since we always interpret it as 'go to next line'
69  * in the decoding loop (which makes code simpler/faster), the first line
70  * would not be counted, so we count one more.
71  * See: https://trac.ffmpeg.org/ticket/226
72  * In the following decoding loop, row_ptr will be the position of the
73  * current row. */
74 
75  row_ptr -= row_inc;
76  pixel_ptr = row_ptr;
77  lines_to_change++;
78  while (lines_to_change) {
79  skip = bytestream2_get_byte(&s->g);
80  rle_code = (int8_t)bytestream2_get_byte(&s->g);
81  if (rle_code == 0)
82  break;
83  if(skip & 0x80) {
84  lines_to_change--;
85  row_ptr += row_inc;
86  pixel_ptr = row_ptr + 2 * 8 * (skip & 0x7f);
87  } else
88  pixel_ptr += 2 * 8 * skip;
89  CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
90 
91  if(rle_code == -1)
92  continue;
93 
94  if (rle_code < 0) {
95  /* decode the run length code */
96  rle_code = -rle_code;
97  /* get the next 2 bytes from the stream, treat them as groups
98  * of 8 pixels, and output them rle_code times */
99 
100  pi0 = bytestream2_get_byte(&s->g);
101  pi1 = bytestream2_get_byte(&s->g);
102  CHECK_PIXEL_PTR(rle_code * 2 * 8);
103 
104  while (rle_code--) {
105  rgb[pixel_ptr++] = (pi0 >> 7) & 0x01;
106  rgb[pixel_ptr++] = (pi0 >> 6) & 0x01;
107  rgb[pixel_ptr++] = (pi0 >> 5) & 0x01;
108  rgb[pixel_ptr++] = (pi0 >> 4) & 0x01;
109  rgb[pixel_ptr++] = (pi0 >> 3) & 0x01;
110  rgb[pixel_ptr++] = (pi0 >> 2) & 0x01;
111  rgb[pixel_ptr++] = (pi0 >> 1) & 0x01;
112  rgb[pixel_ptr++] = pi0 & 0x01;
113  rgb[pixel_ptr++] = (pi1 >> 7) & 0x01;
114  rgb[pixel_ptr++] = (pi1 >> 6) & 0x01;
115  rgb[pixel_ptr++] = (pi1 >> 5) & 0x01;
116  rgb[pixel_ptr++] = (pi1 >> 4) & 0x01;
117  rgb[pixel_ptr++] = (pi1 >> 3) & 0x01;
118  rgb[pixel_ptr++] = (pi1 >> 2) & 0x01;
119  rgb[pixel_ptr++] = (pi1 >> 1) & 0x01;
120  rgb[pixel_ptr++] = pi1 & 0x01;
121  }
122  } else {
123  /* copy the same pixel directly to output 2 times */
124  rle_code *= 2;
125  CHECK_PIXEL_PTR(rle_code * 8);
126 
127  while (rle_code--) {
128  int x = bytestream2_get_byte(&s->g);
129  rgb[pixel_ptr++] = (x >> 7) & 0x01;
130  rgb[pixel_ptr++] = (x >> 6) & 0x01;
131  rgb[pixel_ptr++] = (x >> 5) & 0x01;
132  rgb[pixel_ptr++] = (x >> 4) & 0x01;
133  rgb[pixel_ptr++] = (x >> 3) & 0x01;
134  rgb[pixel_ptr++] = (x >> 2) & 0x01;
135  rgb[pixel_ptr++] = (x >> 1) & 0x01;
136  rgb[pixel_ptr++] = x & 0x01;
137  }
138  }
139  }
140 }
141 
142 static inline void qtrle_decode_2n4bpp(QtrleContext *s, int row_ptr,
143  int lines_to_change, int bpp)
144 {
145  int rle_code, i;
146  int pixel_ptr;
147  int row_inc = s->frame->linesize[0];
148  uint8_t pi[16]; /* 16 palette indices */
149  uint8_t *rgb = s->frame->data[0];
150  int pixel_limit = s->frame->linesize[0] * s->avctx->height;
151  int num_pixels = (bpp == 4) ? 8 : 16;
152 
153  while (lines_to_change--) {
154  pixel_ptr = row_ptr + (num_pixels * (bytestream2_get_byte(&s->g) - 1));
155  CHECK_PIXEL_PTR(0);
156 
157  while ((rle_code = (int8_t)bytestream2_get_byte(&s->g)) != -1) {
158  if (bytestream2_get_bytes_left(&s->g) < 1)
159  return;
160  if (rle_code == 0) {
161  /* there's another skip code in the stream */
162  pixel_ptr += (num_pixels * (bytestream2_get_byte(&s->g) - 1));
163  CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
164  } else if (rle_code < 0) {
165  /* decode the run length code */
166  rle_code = -rle_code;
167  /* get the next 4 bytes from the stream, treat them as palette
168  * indexes, and output them rle_code times */
169  for (i = num_pixels-1; i >= 0; i--) {
170  pi[num_pixels-1-i] = (bytestream2_peek_byte(&s->g) >> ((i*bpp) & 0x07)) & ((1<<bpp)-1);
171  bytestream2_skip(&s->g, ((i & ((num_pixels>>2)-1)) == 0));
172  }
173  CHECK_PIXEL_PTR(rle_code * num_pixels);
174  while (rle_code--) {
175  memcpy(&rgb[pixel_ptr], &pi, num_pixels);
176  pixel_ptr += num_pixels;
177  }
178  } else {
179  /* copy the same pixel directly to output 4 times */
180  rle_code *= 4;
181  CHECK_PIXEL_PTR(rle_code*(num_pixels>>2));
182  while (rle_code--) {
183  if(bpp == 4) {
184  int x = bytestream2_get_byte(&s->g);
185  rgb[pixel_ptr++] = (x >> 4) & 0x0f;
186  rgb[pixel_ptr++] = x & 0x0f;
187  } else {
188  int x = bytestream2_get_byte(&s->g);
189  rgb[pixel_ptr++] = (x >> 6) & 0x03;
190  rgb[pixel_ptr++] = (x >> 4) & 0x03;
191  rgb[pixel_ptr++] = (x >> 2) & 0x03;
192  rgb[pixel_ptr++] = x & 0x03;
193  }
194  }
195  }
196  }
197  row_ptr += row_inc;
198  }
199 }
200 
201 static void qtrle_decode_8bpp(QtrleContext *s, int row_ptr, int lines_to_change)
202 {
203  int rle_code;
204  int pixel_ptr;
205  int row_inc = s->frame->linesize[0];
206  uint8_t pi1, pi2, pi3, pi4; /* 4 palette indexes */
207  uint8_t *rgb = s->frame->data[0];
208  int pixel_limit = s->frame->linesize[0] * s->avctx->height;
209 
210  while (lines_to_change--) {
211  pixel_ptr = row_ptr + (4 * (bytestream2_get_byte(&s->g) - 1));
212  CHECK_PIXEL_PTR(0);
213 
214  while ((rle_code = (int8_t)bytestream2_get_byte(&s->g)) != -1) {
215  if (bytestream2_get_bytes_left(&s->g) < 1)
216  return;
217  if (rle_code == 0) {
218  /* there's another skip code in the stream */
219  pixel_ptr += (4 * (bytestream2_get_byte(&s->g) - 1));
220  CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
221  } else if (rle_code < 0) {
222  /* decode the run length code */
223  rle_code = -rle_code;
224  /* get the next 4 bytes from the stream, treat them as palette
225  * indexes, and output them rle_code times */
226  pi1 = bytestream2_get_byte(&s->g);
227  pi2 = bytestream2_get_byte(&s->g);
228  pi3 = bytestream2_get_byte(&s->g);
229  pi4 = bytestream2_get_byte(&s->g);
230 
231  CHECK_PIXEL_PTR(rle_code * 4);
232 
233  while (rle_code--) {
234  rgb[pixel_ptr++] = pi1;
235  rgb[pixel_ptr++] = pi2;
236  rgb[pixel_ptr++] = pi3;
237  rgb[pixel_ptr++] = pi4;
238  }
239  } else {
240  /* copy the same pixel directly to output 4 times */
241  rle_code *= 4;
242  CHECK_PIXEL_PTR(rle_code);
243 
244  bytestream2_get_buffer(&s->g, &rgb[pixel_ptr], rle_code);
245  pixel_ptr += rle_code;
246  }
247  }
248  row_ptr += row_inc;
249  }
250 }
251 
252 static void qtrle_decode_16bpp(QtrleContext *s, int row_ptr, int lines_to_change)
253 {
254  int rle_code;
255  int pixel_ptr;
256  int row_inc = s->frame->linesize[0];
257  uint16_t rgb16;
258  uint8_t *rgb = s->frame->data[0];
259  int pixel_limit = s->frame->linesize[0] * s->avctx->height;
260 
261  while (lines_to_change--) {
262  pixel_ptr = row_ptr + (bytestream2_get_byte(&s->g) - 1) * 2;
263  CHECK_PIXEL_PTR(0);
264 
265  while ((rle_code = (int8_t)bytestream2_get_byte(&s->g)) != -1) {
266  if (bytestream2_get_bytes_left(&s->g) < 1)
267  return;
268  if (rle_code == 0) {
269  /* there's another skip code in the stream */
270  pixel_ptr += (bytestream2_get_byte(&s->g) - 1) * 2;
271  CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
272  } else if (rle_code < 0) {
273  /* decode the run length code */
274  rle_code = -rle_code;
275  rgb16 = bytestream2_get_be16(&s->g);
276 
277  CHECK_PIXEL_PTR(rle_code * 2);
278 
279  while (rle_code--) {
280  *(uint16_t *)(&rgb[pixel_ptr]) = rgb16;
281  pixel_ptr += 2;
282  }
283  } else {
284  CHECK_PIXEL_PTR(rle_code * 2);
285 
286  /* copy pixels directly to output */
287  while (rle_code--) {
288  rgb16 = bytestream2_get_be16(&s->g);
289  *(uint16_t *)(&rgb[pixel_ptr]) = rgb16;
290  pixel_ptr += 2;
291  }
292  }
293  }
294  row_ptr += row_inc;
295  }
296 }
297 
298 static void qtrle_decode_24bpp(QtrleContext *s, int row_ptr, int lines_to_change)
299 {
300  int rle_code;
301  int pixel_ptr;
302  int row_inc = s->frame->linesize[0];
303  uint8_t r, g, b;
304  uint8_t *rgb = s->frame->data[0];
305  int pixel_limit = s->frame->linesize[0] * s->avctx->height;
306 
307  while (lines_to_change--) {
308  pixel_ptr = row_ptr + (bytestream2_get_byte(&s->g) - 1) * 3;
309  CHECK_PIXEL_PTR(0);
310 
311  while ((rle_code = (int8_t)bytestream2_get_byte(&s->g)) != -1) {
312  if (bytestream2_get_bytes_left(&s->g) < 1)
313  return;
314  if (rle_code == 0) {
315  /* there's another skip code in the stream */
316  pixel_ptr += (bytestream2_get_byte(&s->g) - 1) * 3;
317  CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
318  } else if (rle_code < 0) {
319  /* decode the run length code */
320  rle_code = -rle_code;
321  r = bytestream2_get_byte(&s->g);
322  g = bytestream2_get_byte(&s->g);
323  b = bytestream2_get_byte(&s->g);
324 
325  CHECK_PIXEL_PTR(rle_code * 3);
326 
327  while (rle_code--) {
328  rgb[pixel_ptr++] = r;
329  rgb[pixel_ptr++] = g;
330  rgb[pixel_ptr++] = b;
331  }
332  } else {
333  CHECK_PIXEL_PTR(rle_code * 3);
334 
335  /* copy pixels directly to output */
336  while (rle_code--) {
337  rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
338  rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
339  rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
340  }
341  }
342  }
343  row_ptr += row_inc;
344  }
345 }
346 
347 static void qtrle_decode_32bpp(QtrleContext *s, int row_ptr, int lines_to_change)
348 {
349  int rle_code;
350  int pixel_ptr;
351  int row_inc = s->frame->linesize[0];
352  unsigned int argb;
353  uint8_t *rgb = s->frame->data[0];
354  int pixel_limit = s->frame->linesize[0] * s->avctx->height;
355 
356  while (lines_to_change--) {
357  pixel_ptr = row_ptr + (bytestream2_get_byte(&s->g) - 1) * 4;
358  CHECK_PIXEL_PTR(0);
359 
360  while ((rle_code = (int8_t)bytestream2_get_byte(&s->g)) != -1) {
361  if (bytestream2_get_bytes_left(&s->g) < 1)
362  return;
363  if (rle_code == 0) {
364  /* there's another skip code in the stream */
365  pixel_ptr += (bytestream2_get_byte(&s->g) - 1) * 4;
366  CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
367  } else if (rle_code < 0) {
368  /* decode the run length code */
369  rle_code = -rle_code;
370  argb = bytestream2_get_be32(&s->g);
371 
372  CHECK_PIXEL_PTR(rle_code * 4);
373 
374  while (rle_code--) {
375  AV_WN32A(rgb + pixel_ptr, argb);
376  pixel_ptr += 4;
377  }
378  } else {
379  CHECK_PIXEL_PTR(rle_code * 4);
380 
381  /* copy pixels directly to output */
382  while (rle_code--) {
383  argb = bytestream2_get_be32(&s->g);
384  AV_WN32A(rgb + pixel_ptr, argb);
385  pixel_ptr += 4;
386  }
387  }
388  }
389  row_ptr += row_inc;
390  }
391 }
392 
394 {
395  QtrleContext *s = avctx->priv_data;
396 
397  s->avctx = avctx;
398  switch (avctx->bits_per_coded_sample) {
399  case 1:
400  case 2:
401  case 4:
402  case 8:
403  case 33:
404  case 34:
405  case 36:
406  case 40:
407  avctx->pix_fmt = AV_PIX_FMT_PAL8;
408  break;
409 
410  case 16:
411  avctx->pix_fmt = AV_PIX_FMT_RGB555;
412  break;
413 
414  case 24:
415  avctx->pix_fmt = AV_PIX_FMT_RGB24;
416  break;
417 
418  case 32:
419  avctx->pix_fmt = AV_PIX_FMT_RGB32;
420  break;
421 
422  default:
423  av_log (avctx, AV_LOG_ERROR, "Unsupported colorspace: %d bits/sample?\n",
424  avctx->bits_per_coded_sample);
425  return AVERROR_INVALIDDATA;
426  }
427 
428  s->frame = av_frame_alloc();
429  if (!s->frame)
430  return AVERROR(ENOMEM);
431 
432  return 0;
433 }
434 
436  void *data, int *got_frame,
437  AVPacket *avpkt)
438 {
439  QtrleContext *s = avctx->priv_data;
440  int header, start_line;
441  int height, row_ptr;
442  int has_palette = 0;
443  int ret;
444 
445  bytestream2_init(&s->g, avpkt->data, avpkt->size);
446 
447  /* check if this frame is even supposed to change */
448  if (avpkt->size < 8)
449  return avpkt->size;
450 
451  /* start after the chunk size */
452  bytestream2_seek(&s->g, 4, SEEK_SET);
453 
454  /* fetch the header */
455  header = bytestream2_get_be16(&s->g);
456 
457  /* if a header is present, fetch additional decoding parameters */
458  if (header & 0x0008) {
459  if (avpkt->size < 14)
460  return avpkt->size;
461  start_line = bytestream2_get_be16(&s->g);
462  bytestream2_skip(&s->g, 2);
463  height = bytestream2_get_be16(&s->g);
464  bytestream2_skip(&s->g, 2);
465  if (height > s->avctx->height - start_line)
466  return avpkt->size;
467  } else {
468  start_line = 0;
469  height = s->avctx->height;
470  }
471  if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
472  return ret;
473 
474  row_ptr = s->frame->linesize[0] * start_line;
475 
476  switch (avctx->bits_per_coded_sample) {
477  case 1:
478  case 33:
479  qtrle_decode_1bpp(s, row_ptr, height);
480  has_palette = 1;
481  break;
482 
483  case 2:
484  case 34:
485  qtrle_decode_2n4bpp(s, row_ptr, height, 2);
486  has_palette = 1;
487  break;
488 
489  case 4:
490  case 36:
491  qtrle_decode_2n4bpp(s, row_ptr, height, 4);
492  has_palette = 1;
493  break;
494 
495  case 8:
496  case 40:
497  qtrle_decode_8bpp(s, row_ptr, height);
498  has_palette = 1;
499  break;
500 
501  case 16:
502  qtrle_decode_16bpp(s, row_ptr, height);
503  break;
504 
505  case 24:
506  qtrle_decode_24bpp(s, row_ptr, height);
507  break;
508 
509  case 32:
510  qtrle_decode_32bpp(s, row_ptr, height);
511  break;
512 
513  default:
514  av_log (s->avctx, AV_LOG_ERROR, "Unsupported colorspace: %d bits/sample?\n",
515  avctx->bits_per_coded_sample);
516  break;
517  }
518 
519  if(has_palette) {
520  int size;
521  const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &size);
522 
523  if (pal && size == AVPALETTE_SIZE) {
524  s->frame->palette_has_changed = 1;
525  memcpy(s->pal, pal, AVPALETTE_SIZE);
526  } else if (pal) {
527  av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
528  }
529 
530  /* make the palette available on the way out */
531  memcpy(s->frame->data[1], s->pal, AVPALETTE_SIZE);
532  }
533 
534  if ((ret = av_frame_ref(data, s->frame)) < 0)
535  return ret;
536  *got_frame = 1;
537 
538  /* always report that the buffer was completely consumed */
539  return avpkt->size;
540 }
541 
543 {
544  QtrleContext *s = avctx->priv_data;
545 
546  av_frame_free(&s->frame);
547 
548  return 0;
549 }
550 
552  .name = "qtrle",
553  .long_name = NULL_IF_CONFIG_SMALL("QuickTime Animation (RLE) video"),
554  .type = AVMEDIA_TYPE_VIDEO,
555  .id = AV_CODEC_ID_QTRLE,
556  .priv_data_size = sizeof(QtrleContext),
558  .close = qtrle_decode_end,
560  .capabilities = AV_CODEC_CAP_DR1,
561 };
static void qtrle_decode_2n4bpp(QtrleContext *s, int row_ptr, int lines_to_change, int bpp)
Definition: qtrle.c:142
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:218
GetByteContext g
Definition: qtrle.c:46
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
const char * g
Definition: vf_curves.c:115
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
AVFrame * frame
Definition: qtrle.c:44
int size
Definition: avcodec.h:1445
const char * b
Definition: vf_curves.c:116
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1742
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
AVCodec.
Definition: avcodec.h:3423
#define AV_WN32A(p, v)
Definition: intreadwrite.h:538
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
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: decode.c:1969
uint8_t
#define av_cold
Definition: attributes.h:82
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:189
static void qtrle_decode_24bpp(QtrleContext *s, int row_ptr, int lines_to_change)
Definition: qtrle.c:298
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:77
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:441
AVCodecContext * avctx
Definition: qtrle.c:43
#define height
uint8_t * data
Definition: avcodec.h:1444
static av_cold int qtrle_decode_init(AVCodecContext *avctx)
Definition: qtrle.c:393
static void qtrle_decode_1bpp(QtrleContext *s, int row_ptr, int lines_to_change)
Definition: qtrle.c:57
ptrdiff_t size
Definition: opengl_enc.c:101
static const uint8_t header[24]
Definition: sdr2.c:67
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2749
#define av_log(a,...)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette...
Definition: avcodec.h:1157
#define AVERROR(e)
Definition: error.h:43
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:164
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
Definition: avpacket.c:350
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
const char * r
Definition: vf_curves.c:114
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:263
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:154
const char * name
Name of the codec implementation.
Definition: avcodec.h:3430
static void qtrle_decode_8bpp(QtrleContext *s, int row_ptr, int lines_to_change)
Definition: qtrle.c:201
#define s(width, name)
Definition: cbs_vp9.c:257
uint32_t pal[256]
Definition: qtrle.c:47
#define CHECK_PIXEL_PTR(n)
Definition: qtrle.c:50
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:249
main external API structure.
Definition: avcodec.h:1532
#define AV_PIX_FMT_RGB32
Definition: pixfmt.h:352
int palette_has_changed
Tell user application that palette has changed from previous frame.
Definition: frame.h:375
static void qtrle_decode_32bpp(QtrleContext *s, int row_ptr, int lines_to_change)
Definition: qtrle.c:347
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:232
common internal api header.
static int qtrle_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: qtrle.c:435
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:367
void * priv_data
Definition: avcodec.h:1559
AVCodec ff_qtrle_decoder
Definition: qtrle.c:551
static av_always_inline int bytestream2_seek(GetByteContext *g, int offset, int whence)
Definition: bytestream.h:208
static void qtrle_decode_16bpp(QtrleContext *s, int row_ptr, int lines_to_change)
Definition: qtrle.c:252
static av_cold int qtrle_decode_end(AVCodecContext *avctx)
Definition: qtrle.c:542
This structure stores compressed data.
Definition: avcodec.h:1421
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:967