FFmpeg  4.4.5
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 "decode.h"
40 #include "bytestream.h"
41 #include "internal.h"
42 
43 typedef struct QtrleContext {
46 
48  uint32_t pal[256];
49 } QtrleContext;
50 
51 #define CHECK_PIXEL_PTR(n) \
52  if ((pixel_ptr + n > pixel_limit) || (pixel_ptr + n < 0)) { \
53  av_log (s->avctx, AV_LOG_ERROR, "Problem: pixel_ptr = %d, pixel_limit = %d\n",\
54  pixel_ptr + n, pixel_limit); \
55  return; \
56  } \
57 
58 static void qtrle_decode_1bpp(QtrleContext *s, int row_ptr, int lines_to_change)
59 {
60  int rle_code;
61  int pixel_ptr;
62  int row_inc = s->frame->linesize[0];
63  uint8_t pi0, pi1; /* 2 8-pixel values */
64  uint8_t *rgb = s->frame->data[0];
65  int pixel_limit = s->frame->linesize[0] * s->avctx->height;
66  int skip;
67  /* skip & 0x80 appears to mean 'start a new line', which can be interpreted
68  * as 'go to next line' during the decoding of a frame but is 'go to first
69  * line' at the beginning. Since we always interpret it as 'go to next line'
70  * in the decoding loop (which makes code simpler/faster), the first line
71  * would not be counted, so we count one more.
72  * See: https://trac.ffmpeg.org/ticket/226
73  * In the following decoding loop, row_ptr will be the position of the
74  * current row. */
75 
76  row_ptr -= row_inc;
77  pixel_ptr = row_ptr;
78  lines_to_change++;
79  while (lines_to_change) {
80  skip = bytestream2_get_byte(&s->g);
81  rle_code = (int8_t)bytestream2_get_byte(&s->g);
82  if (rle_code == 0)
83  break;
84  if(skip & 0x80) {
85  lines_to_change--;
86  row_ptr += row_inc;
87  pixel_ptr = row_ptr + 2 * 8 * (skip & 0x7f);
88  } else
89  pixel_ptr += 2 * 8 * skip;
90  CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
91 
92  if(rle_code == -1)
93  continue;
94 
95  if (rle_code < 0) {
96  /* decode the run length code */
97  rle_code = -rle_code;
98  /* get the next 2 bytes from the stream, treat them as groups
99  * of 8 pixels, and output them rle_code times */
100 
101  pi0 = bytestream2_get_byte(&s->g);
102  pi1 = bytestream2_get_byte(&s->g);
103  CHECK_PIXEL_PTR(rle_code * 2 * 8);
104 
105  while (rle_code--) {
106  rgb[pixel_ptr++] = (pi0 >> 7) & 0x01;
107  rgb[pixel_ptr++] = (pi0 >> 6) & 0x01;
108  rgb[pixel_ptr++] = (pi0 >> 5) & 0x01;
109  rgb[pixel_ptr++] = (pi0 >> 4) & 0x01;
110  rgb[pixel_ptr++] = (pi0 >> 3) & 0x01;
111  rgb[pixel_ptr++] = (pi0 >> 2) & 0x01;
112  rgb[pixel_ptr++] = (pi0 >> 1) & 0x01;
113  rgb[pixel_ptr++] = pi0 & 0x01;
114  rgb[pixel_ptr++] = (pi1 >> 7) & 0x01;
115  rgb[pixel_ptr++] = (pi1 >> 6) & 0x01;
116  rgb[pixel_ptr++] = (pi1 >> 5) & 0x01;
117  rgb[pixel_ptr++] = (pi1 >> 4) & 0x01;
118  rgb[pixel_ptr++] = (pi1 >> 3) & 0x01;
119  rgb[pixel_ptr++] = (pi1 >> 2) & 0x01;
120  rgb[pixel_ptr++] = (pi1 >> 1) & 0x01;
121  rgb[pixel_ptr++] = pi1 & 0x01;
122  }
123  } else {
124  /* copy the same pixel directly to output 2 times */
125  rle_code *= 2;
126  CHECK_PIXEL_PTR(rle_code * 8);
127 
128  while (rle_code--) {
129  int x = bytestream2_get_byte(&s->g);
130  rgb[pixel_ptr++] = (x >> 7) & 0x01;
131  rgb[pixel_ptr++] = (x >> 6) & 0x01;
132  rgb[pixel_ptr++] = (x >> 5) & 0x01;
133  rgb[pixel_ptr++] = (x >> 4) & 0x01;
134  rgb[pixel_ptr++] = (x >> 3) & 0x01;
135  rgb[pixel_ptr++] = (x >> 2) & 0x01;
136  rgb[pixel_ptr++] = (x >> 1) & 0x01;
137  rgb[pixel_ptr++] = x & 0x01;
138  }
139  }
140  }
141 }
142 
143 static inline void qtrle_decode_2n4bpp(QtrleContext *s, int row_ptr,
144  int lines_to_change, int bpp)
145 {
146  int rle_code, i;
147  int pixel_ptr;
148  int row_inc = s->frame->linesize[0];
149  uint8_t pi[16]; /* 16 palette indices */
150  uint8_t *rgb = s->frame->data[0];
151  int pixel_limit = s->frame->linesize[0] * s->avctx->height;
152  int num_pixels = (bpp == 4) ? 8 : 16;
153 
154  while (lines_to_change--) {
155  pixel_ptr = row_ptr + (num_pixels * (bytestream2_get_byte(&s->g) - 1));
156  CHECK_PIXEL_PTR(0);
157 
158  while ((rle_code = (int8_t)bytestream2_get_byte(&s->g)) != -1) {
159  if (bytestream2_get_bytes_left(&s->g) < 1)
160  return;
161  if (rle_code == 0) {
162  /* there's another skip code in the stream */
163  pixel_ptr += (num_pixels * (bytestream2_get_byte(&s->g) - 1));
164  CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
165  } else if (rle_code < 0) {
166  /* decode the run length code */
167  rle_code = -rle_code;
168  /* get the next 4 bytes from the stream, treat them as palette
169  * indexes, and output them rle_code times */
170  for (i = num_pixels-1; i >= 0; i--) {
171  pi[num_pixels-1-i] = (bytestream2_peek_byte(&s->g) >> ((i*bpp) & 0x07)) & ((1<<bpp)-1);
172  bytestream2_skip(&s->g, ((i & ((num_pixels>>2)-1)) == 0));
173  }
174  CHECK_PIXEL_PTR(rle_code * num_pixels);
175  while (rle_code--) {
176  memcpy(&rgb[pixel_ptr], &pi, num_pixels);
177  pixel_ptr += num_pixels;
178  }
179  } else {
180  /* copy the same pixel directly to output 4 times */
181  rle_code *= 4;
182  CHECK_PIXEL_PTR(rle_code*(num_pixels>>2));
183  while (rle_code--) {
184  if(bpp == 4) {
185  int x = bytestream2_get_byte(&s->g);
186  rgb[pixel_ptr++] = (x >> 4) & 0x0f;
187  rgb[pixel_ptr++] = x & 0x0f;
188  } else {
189  int x = bytestream2_get_byte(&s->g);
190  rgb[pixel_ptr++] = (x >> 6) & 0x03;
191  rgb[pixel_ptr++] = (x >> 4) & 0x03;
192  rgb[pixel_ptr++] = (x >> 2) & 0x03;
193  rgb[pixel_ptr++] = x & 0x03;
194  }
195  }
196  }
197  }
198  row_ptr += row_inc;
199  }
200 }
201 
202 static void qtrle_decode_8bpp(QtrleContext *s, int row_ptr, int lines_to_change)
203 {
204  int rle_code;
205  int pixel_ptr;
206  int row_inc = s->frame->linesize[0];
207  uint8_t pi1, pi2, pi3, pi4; /* 4 palette indexes */
208  uint8_t *rgb = s->frame->data[0];
209  int pixel_limit = s->frame->linesize[0] * s->avctx->height;
210 
211  while (lines_to_change--) {
212  pixel_ptr = row_ptr + (4 * (bytestream2_get_byte(&s->g) - 1));
213  CHECK_PIXEL_PTR(0);
214 
215  while ((rle_code = (int8_t)bytestream2_get_byte(&s->g)) != -1) {
216  if (bytestream2_get_bytes_left(&s->g) < 1)
217  return;
218  if (rle_code == 0) {
219  /* there's another skip code in the stream */
220  pixel_ptr += (4 * (bytestream2_get_byte(&s->g) - 1));
221  CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
222  } else if (rle_code < 0) {
223  /* decode the run length code */
224  rle_code = -rle_code;
225  /* get the next 4 bytes from the stream, treat them as palette
226  * indexes, and output them rle_code times */
227  pi1 = bytestream2_get_byte(&s->g);
228  pi2 = bytestream2_get_byte(&s->g);
229  pi3 = bytestream2_get_byte(&s->g);
230  pi4 = bytestream2_get_byte(&s->g);
231 
232  CHECK_PIXEL_PTR(rle_code * 4);
233 
234  while (rle_code--) {
235  rgb[pixel_ptr++] = pi1;
236  rgb[pixel_ptr++] = pi2;
237  rgb[pixel_ptr++] = pi3;
238  rgb[pixel_ptr++] = pi4;
239  }
240  } else {
241  /* copy the same pixel directly to output 4 times */
242  rle_code *= 4;
243  CHECK_PIXEL_PTR(rle_code);
244 
245  bytestream2_get_buffer(&s->g, &rgb[pixel_ptr], rle_code);
246  pixel_ptr += rle_code;
247  }
248  }
249  row_ptr += row_inc;
250  }
251 }
252 
253 static void qtrle_decode_16bpp(QtrleContext *s, int row_ptr, int lines_to_change)
254 {
255  int rle_code;
256  int pixel_ptr;
257  int row_inc = s->frame->linesize[0];
258  uint16_t rgb16;
259  uint8_t *rgb = s->frame->data[0];
260  int pixel_limit = s->frame->linesize[0] * s->avctx->height;
261 
262  while (lines_to_change--) {
263  pixel_ptr = row_ptr + (bytestream2_get_byte(&s->g) - 1) * 2;
264  CHECK_PIXEL_PTR(0);
265 
266  while ((rle_code = (int8_t)bytestream2_get_byte(&s->g)) != -1) {
267  if (bytestream2_get_bytes_left(&s->g) < 1)
268  return;
269  if (rle_code == 0) {
270  /* there's another skip code in the stream */
271  pixel_ptr += (bytestream2_get_byte(&s->g) - 1) * 2;
272  CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
273  } else if (rle_code < 0) {
274  /* decode the run length code */
275  rle_code = -rle_code;
276  rgb16 = bytestream2_get_be16(&s->g);
277 
278  CHECK_PIXEL_PTR(rle_code * 2);
279 
280  while (rle_code--) {
281  *(uint16_t *)(&rgb[pixel_ptr]) = rgb16;
282  pixel_ptr += 2;
283  }
284  } else {
285  CHECK_PIXEL_PTR(rle_code * 2);
286 
287  /* copy pixels directly to output */
288  while (rle_code--) {
289  rgb16 = bytestream2_get_be16(&s->g);
290  *(uint16_t *)(&rgb[pixel_ptr]) = rgb16;
291  pixel_ptr += 2;
292  }
293  }
294  }
295  row_ptr += row_inc;
296  }
297 }
298 
299 static void qtrle_decode_24bpp(QtrleContext *s, int row_ptr, int lines_to_change)
300 {
301  int rle_code, rle_code_half;
302  int pixel_ptr;
303  int row_inc = s->frame->linesize[0];
304  uint8_t b;
305  uint16_t rg;
306  uint8_t *rgb = s->frame->data[0];
307  int pixel_limit = s->frame->linesize[0] * s->avctx->height;
308 
309  while (lines_to_change--) {
310  pixel_ptr = row_ptr + (bytestream2_get_byte(&s->g) - 1) * 3;
311  CHECK_PIXEL_PTR(0);
312 
313  while ((rle_code = (int8_t)bytestream2_get_byte(&s->g)) != -1) {
314  if (bytestream2_get_bytes_left(&s->g) < 1)
315  return;
316  if (rle_code == 0) {
317  /* there's another skip code in the stream */
318  pixel_ptr += (bytestream2_get_byte(&s->g) - 1) * 3;
319  CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
320  } else if (rle_code < 0) {
321  /* decode the run length code */
322  rle_code = -rle_code;
323  rg = bytestream2_get_ne16(&s->g);
324  b = bytestream2_get_byte(&s->g);
325 
326  CHECK_PIXEL_PTR(rle_code * 3);
327 
328  while (rle_code--) {
329  AV_WN16(rgb + pixel_ptr, rg);
330  rgb[pixel_ptr + 2] = b;
331  pixel_ptr += 3;
332  }
333  } else {
334  CHECK_PIXEL_PTR(rle_code * 3);
335 
336  rle_code_half = rle_code / 2;
337 
338  while (rle_code_half--) { /* copy 2 raw rgb value at the same time */
339  AV_WN32(rgb + pixel_ptr, bytestream2_get_ne32(&s->g)); /* rgbr */
340  AV_WN16(rgb + pixel_ptr + 4, bytestream2_get_ne16(&s->g)); /* rgbr */
341  pixel_ptr += 6;
342  }
343 
344  if (rle_code % 2 != 0){ /* not even raw value */
345  AV_WN16(rgb + pixel_ptr, bytestream2_get_ne16(&s->g));
346  rgb[pixel_ptr + 2] = bytestream2_get_byte(&s->g);
347  pixel_ptr += 3;
348  }
349  }
350  }
351  row_ptr += row_inc;
352  }
353 }
354 
355 static void qtrle_decode_32bpp(QtrleContext *s, int row_ptr, int lines_to_change)
356 {
357  int rle_code, rle_code_half;
358  int pixel_ptr;
359  int row_inc = s->frame->linesize[0];
360  unsigned int argb;
361  uint8_t *rgb = s->frame->data[0];
362  int pixel_limit = s->frame->linesize[0] * s->avctx->height;
363 
364  while (lines_to_change--) {
365  pixel_ptr = row_ptr + (bytestream2_get_byte(&s->g) - 1) * 4;
366  CHECK_PIXEL_PTR(0);
367 
368  while ((rle_code = (int8_t)bytestream2_get_byte(&s->g)) != -1) {
369  if (bytestream2_get_bytes_left(&s->g) < 1)
370  return;
371  if (rle_code == 0) {
372  /* there's another skip code in the stream */
373  pixel_ptr += (bytestream2_get_byte(&s->g) - 1) * 4;
374  CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
375  } else if (rle_code < 0) {
376  /* decode the run length code */
377  rle_code = -rle_code;
378  argb = bytestream2_get_ne32(&s->g);
379 
380  CHECK_PIXEL_PTR(rle_code * 4);
381 
382  while (rle_code--) {
383  AV_WN32A(rgb + pixel_ptr, argb);
384  pixel_ptr += 4;
385  }
386  } else {
387  CHECK_PIXEL_PTR(rle_code * 4);
388 
389  /* copy pixels directly to output */
390  rle_code_half = rle_code / 2;
391  while (rle_code_half--) { /* copy 2 argb raw value at the same time */
392  AV_WN64(rgb + pixel_ptr, bytestream2_get_ne64(&s->g));
393  pixel_ptr += 8;
394  }
395 
396  if (rle_code % 2 != 0){ /* not even raw value */
397  AV_WN32A(rgb + pixel_ptr, bytestream2_get_ne32(&s->g));
398  pixel_ptr += 4;
399  }
400  }
401  }
402  row_ptr += row_inc;
403  }
404 }
405 
407 {
408  QtrleContext *s = avctx->priv_data;
409 
410  s->avctx = avctx;
411  switch (avctx->bits_per_coded_sample) {
412  case 1:
413  case 2:
414  case 4:
415  case 8:
416  case 33:
417  case 34:
418  case 36:
419  case 40:
420  avctx->pix_fmt = AV_PIX_FMT_PAL8;
421  break;
422 
423  case 16:
424  avctx->pix_fmt = AV_PIX_FMT_RGB555;
425  break;
426 
427  case 24:
428  avctx->pix_fmt = AV_PIX_FMT_RGB24;
429  break;
430 
431  case 32:
432  avctx->pix_fmt = AV_PIX_FMT_ARGB;
433  break;
434 
435  default:
436  av_log (avctx, AV_LOG_ERROR, "Unsupported colorspace: %d bits/sample?\n",
437  avctx->bits_per_coded_sample);
438  return AVERROR_INVALIDDATA;
439  }
440 
441  s->frame = av_frame_alloc();
442  if (!s->frame)
443  return AVERROR(ENOMEM);
444 
445  return 0;
446 }
447 
449  void *data, int *got_frame,
450  AVPacket *avpkt)
451 {
452  QtrleContext *s = avctx->priv_data;
453  int header, start_line;
454  int height, row_ptr;
455  int has_palette = 0;
456  int duplicate = 0;
457  int ret, size;
458 
459  bytestream2_init(&s->g, avpkt->data, avpkt->size);
460 
461  /* check if this frame is even supposed to change */
462  if (avpkt->size < 8) {
463  duplicate = 1;
464  goto done;
465  }
466 
467  /* start after the chunk size */
468  size = bytestream2_get_be32(&s->g) & 0x3FFFFFFF;
469  if (size - avpkt->size > size * (int64_t)avctx->discard_damaged_percentage / 100)
470  return AVERROR_INVALIDDATA;
471 
472 
473  /* fetch the header */
474  header = bytestream2_get_be16(&s->g);
475 
476  /* if a header is present, fetch additional decoding parameters */
477  if (header & 0x0008) {
478  if (avpkt->size < 14) {
479  duplicate = 1;
480  goto done;
481  }
482  start_line = bytestream2_get_be16(&s->g);
483  bytestream2_skip(&s->g, 2);
484  height = bytestream2_get_be16(&s->g);
485  bytestream2_skip(&s->g, 2);
486  if (height > s->avctx->height - start_line) {
487  duplicate = 1;
488  goto done;
489  }
490  } else {
491  start_line = 0;
492  height = s->avctx->height;
493  }
494  if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0)
495  return ret;
496 
497  row_ptr = s->frame->linesize[0] * start_line;
498 
499  switch (avctx->bits_per_coded_sample) {
500  case 1:
501  case 33:
502  qtrle_decode_1bpp(s, row_ptr, height);
503  has_palette = 1;
504  break;
505 
506  case 2:
507  case 34:
508  qtrle_decode_2n4bpp(s, row_ptr, height, 2);
509  has_palette = 1;
510  break;
511 
512  case 4:
513  case 36:
514  qtrle_decode_2n4bpp(s, row_ptr, height, 4);
515  has_palette = 1;
516  break;
517 
518  case 8:
519  case 40:
520  qtrle_decode_8bpp(s, row_ptr, height);
521  has_palette = 1;
522  break;
523 
524  case 16:
525  qtrle_decode_16bpp(s, row_ptr, height);
526  break;
527 
528  case 24:
529  qtrle_decode_24bpp(s, row_ptr, height);
530  break;
531 
532  case 32:
533  qtrle_decode_32bpp(s, row_ptr, height);
534  break;
535 
536  default:
537  av_log (s->avctx, AV_LOG_ERROR, "Unsupported colorspace: %d bits/sample?\n",
538  avctx->bits_per_coded_sample);
539  break;
540  }
541 
542  if(has_palette) {
545 
546  if (pal && size == AVPALETTE_SIZE) {
547  s->frame->palette_has_changed = 1;
548  memcpy(s->pal, pal, AVPALETTE_SIZE);
549  } else if (pal) {
550  av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
551  }
552 
553  /* make the palette available on the way out */
554  memcpy(s->frame->data[1], s->pal, AVPALETTE_SIZE);
555  }
556 
557 done:
558  if (!s->frame->data[0])
559  return AVERROR_INVALIDDATA;
560  if (duplicate) {
561  // ff_reget_buffer() isn't needed when frames don't change, so just update
562  // frame props.
563  ret = ff_decode_frame_props(avctx, s->frame);
564  if (ret < 0)
565  return ret;
566  }
567 
568  if ((ret = av_frame_ref(data, s->frame)) < 0)
569  return ret;
570  *got_frame = 1;
571 
572  /* always report that the buffer was completely consumed */
573  return avpkt->size;
574 }
575 
577 {
578  QtrleContext *s = avctx->priv_data;
579 
580  av_frame_unref(s->frame);
581 }
582 
584 {
585  QtrleContext *s = avctx->priv_data;
586 
587  av_frame_free(&s->frame);
588 
589  return 0;
590 }
591 
593  .name = "qtrle",
594  .long_name = NULL_IF_CONFIG_SMALL("QuickTime Animation (RLE) video"),
595  .type = AVMEDIA_TYPE_VIDEO,
596  .id = AV_CODEC_ID_QTRLE,
597  .priv_data_size = sizeof(QtrleContext),
599  .close = qtrle_decode_end,
602  .capabilities = AV_CODEC_CAP_DR1,
603 };
static void flush(AVCodecContext *avctx)
#define av_cold
Definition: attributes.h:88
uint8_t
Libavcodec external API header.
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, buffer_size_t *size)
Definition: avpacket.c:368
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
#define bytestream2_get_ne64
Definition: bytestream.h:122
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:267
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:158
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:137
#define bytestream2_get_ne32
Definition: bytestream.h:121
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:168
#define bytestream2_get_ne16
Definition: bytestream.h:119
#define s(width, name)
Definition: cbs_vp9.c:257
long long int64_t
Definition: coverity.c:34
int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame)
Set various frame properties from the codec context / packet data.
Definition: decode.c:1731
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Identical in function to ff_get_buffer(), except it reuses the existing buffer if available.
Definition: decode.c:2007
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
@ AV_CODEC_ID_QTRLE
Definition: codec_id.h:104
@ AV_PKT_DATA_PALETTE
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette.
Definition: packet.h:46
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR(e)
Definition: error.h:43
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:553
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:443
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:190
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
int i
Definition: input.c:407
#define AV_WN32(p, v)
Definition: intreadwrite.h:376
#define AV_WN32A(p, v)
Definition: intreadwrite.h:538
#define AV_WN64(p, v)
Definition: intreadwrite.h:380
#define AV_WN16(p, v)
Definition: intreadwrite.h:372
common internal API header
int buffer_size_t
Definition: internal.h:306
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
const char data[16]
Definition: mxf.c:142
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
@ AV_PIX_FMT_ARGB
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:92
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:77
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:387
static void RENAME() duplicate(uint8_t src[], int stride)
Duplicate the given 8 src pixels ? times upward.
static int qtrle_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: qtrle.c:448
static void qtrle_decode_8bpp(QtrleContext *s, int row_ptr, int lines_to_change)
Definition: qtrle.c:202
static void qtrle_decode_2n4bpp(QtrleContext *s, int row_ptr, int lines_to_change, int bpp)
Definition: qtrle.c:143
static void qtrle_decode_1bpp(QtrleContext *s, int row_ptr, int lines_to_change)
Definition: qtrle.c:58
static void qtrle_decode_flush(AVCodecContext *avctx)
Definition: qtrle.c:576
AVCodec ff_qtrle_decoder
Definition: qtrle.c:592
static av_cold int qtrle_decode_init(AVCodecContext *avctx)
Definition: qtrle.c:406
static void qtrle_decode_32bpp(QtrleContext *s, int row_ptr, int lines_to_change)
Definition: qtrle.c:355
static void qtrle_decode_16bpp(QtrleContext *s, int row_ptr, int lines_to_change)
Definition: qtrle.c:253
static void qtrle_decode_24bpp(QtrleContext *s, int row_ptr, int lines_to_change)
Definition: qtrle.c:299
static av_cold int qtrle_decode_end(AVCodecContext *avctx)
Definition: qtrle.c:583
#define CHECK_PIXEL_PTR(n)
Definition: qtrle.c:51
static const uint8_t header[24]
Definition: sdr2.c:67
main external API structure.
Definition: avcodec.h:536
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:746
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:1740
int discard_damaged_percentage
The percentage of damaged samples to discard a frame.
Definition: avcodec.h:2328
void * priv_data
Definition: avcodec.h:563
AVCodec.
Definition: codec.h:197
const char * name
Name of the codec implementation.
Definition: codec.h:204
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
This structure stores compressed data.
Definition: packet.h:346
int size
Definition: packet.h:370
uint8_t * data
Definition: packet.h:369
AVCodecContext * avctx
Definition: qtrle.c:44
AVFrame * frame
Definition: qtrle.c:45
uint32_t pal[256]
Definition: qtrle.c:48
GetByteContext g
Definition: qtrle.c:47
Definition: rpzaenc.c:58
#define av_log(a,...)
#define height
int size
const char * b
Definition: vf_curves.c:118