FFmpeg  4.3
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, rle_code_half;
301  int pixel_ptr;
302  int row_inc = s->frame->linesize[0];
303  uint8_t b;
304  uint16_t rg;
305  uint8_t *rgb = s->frame->data[0];
306  int pixel_limit = s->frame->linesize[0] * s->avctx->height;
307 
308  while (lines_to_change--) {
309  pixel_ptr = row_ptr + (bytestream2_get_byte(&s->g) - 1) * 3;
310  CHECK_PIXEL_PTR(0);
311 
312  while ((rle_code = (int8_t)bytestream2_get_byte(&s->g)) != -1) {
313  if (bytestream2_get_bytes_left(&s->g) < 1)
314  return;
315  if (rle_code == 0) {
316  /* there's another skip code in the stream */
317  pixel_ptr += (bytestream2_get_byte(&s->g) - 1) * 3;
318  CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
319  } else if (rle_code < 0) {
320  /* decode the run length code */
321  rle_code = -rle_code;
322  rg = bytestream2_get_ne16(&s->g);
323  b = bytestream2_get_byte(&s->g);
324 
325  CHECK_PIXEL_PTR(rle_code * 3);
326 
327  while (rle_code--) {
328  AV_WN16(rgb + pixel_ptr, rg);
329  rgb[pixel_ptr + 2] = b;
330  pixel_ptr += 3;
331  }
332  } else {
333  CHECK_PIXEL_PTR(rle_code * 3);
334 
335  rle_code_half = rle_code / 2;
336 
337  while (rle_code_half--) { /* copy 2 raw rgb value at the same time */
338  AV_WN32(rgb + pixel_ptr, bytestream2_get_ne32(&s->g)); /* rgbr */
339  AV_WN16(rgb + pixel_ptr + 4, bytestream2_get_ne16(&s->g)); /* rgbr */
340  pixel_ptr += 6;
341  }
342 
343  if (rle_code % 2 != 0){ /* not even raw value */
344  AV_WN16(rgb + pixel_ptr, bytestream2_get_ne16(&s->g));
345  rgb[pixel_ptr + 2] = bytestream2_get_byte(&s->g);
346  pixel_ptr += 3;
347  }
348  }
349  }
350  row_ptr += row_inc;
351  }
352 }
353 
354 static void qtrle_decode_32bpp(QtrleContext *s, int row_ptr, int lines_to_change)
355 {
356  int rle_code, rle_code_half;
357  int pixel_ptr;
358  int row_inc = s->frame->linesize[0];
359  unsigned int argb;
360  uint8_t *rgb = s->frame->data[0];
361  int pixel_limit = s->frame->linesize[0] * s->avctx->height;
362 
363  while (lines_to_change--) {
364  pixel_ptr = row_ptr + (bytestream2_get_byte(&s->g) - 1) * 4;
365  CHECK_PIXEL_PTR(0);
366 
367  while ((rle_code = (int8_t)bytestream2_get_byte(&s->g)) != -1) {
368  if (bytestream2_get_bytes_left(&s->g) < 1)
369  return;
370  if (rle_code == 0) {
371  /* there's another skip code in the stream */
372  pixel_ptr += (bytestream2_get_byte(&s->g) - 1) * 4;
373  CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
374  } else if (rle_code < 0) {
375  /* decode the run length code */
376  rle_code = -rle_code;
377  argb = bytestream2_get_ne32(&s->g);
378 
379  CHECK_PIXEL_PTR(rle_code * 4);
380 
381  while (rle_code--) {
382  AV_WN32A(rgb + pixel_ptr, argb);
383  pixel_ptr += 4;
384  }
385  } else {
386  CHECK_PIXEL_PTR(rle_code * 4);
387 
388  /* copy pixels directly to output */
389  rle_code_half = rle_code / 2;
390  while (rle_code_half--) { /* copy 2 argb raw value at the same time */
391  AV_WN64(rgb + pixel_ptr, bytestream2_get_ne64(&s->g));
392  pixel_ptr += 8;
393  }
394 
395  if (rle_code % 2 != 0){ /* not even raw value */
396  AV_WN32A(rgb + pixel_ptr, bytestream2_get_ne32(&s->g));
397  pixel_ptr += 4;
398  }
399  }
400  }
401  row_ptr += row_inc;
402  }
403 }
404 
406 {
407  QtrleContext *s = avctx->priv_data;
408 
409  s->avctx = avctx;
410  switch (avctx->bits_per_coded_sample) {
411  case 1:
412  case 2:
413  case 4:
414  case 8:
415  case 33:
416  case 34:
417  case 36:
418  case 40:
419  avctx->pix_fmt = AV_PIX_FMT_PAL8;
420  break;
421 
422  case 16:
423  avctx->pix_fmt = AV_PIX_FMT_RGB555;
424  break;
425 
426  case 24:
427  avctx->pix_fmt = AV_PIX_FMT_RGB24;
428  break;
429 
430  case 32:
431  avctx->pix_fmt = AV_PIX_FMT_ARGB;
432  break;
433 
434  default:
435  av_log (avctx, AV_LOG_ERROR, "Unsupported colorspace: %d bits/sample?\n",
436  avctx->bits_per_coded_sample);
437  return AVERROR_INVALIDDATA;
438  }
439 
440  s->frame = av_frame_alloc();
441  if (!s->frame)
442  return AVERROR(ENOMEM);
443 
444  return 0;
445 }
446 
448  void *data, int *got_frame,
449  AVPacket *avpkt)
450 {
451  QtrleContext *s = avctx->priv_data;
452  int header, start_line;
453  int height, row_ptr;
454  int has_palette = 0;
455  int duplicate = 0;
456  int ret, size;
457 
458  bytestream2_init(&s->g, avpkt->data, avpkt->size);
459 
460  /* check if this frame is even supposed to change */
461  if (avpkt->size < 8) {
462  duplicate = 1;
463  goto done;
464  }
465 
466  /* start after the chunk size */
467  size = bytestream2_get_be32(&s->g) & 0x3FFFFFFF;
468  if (size - avpkt->size > size * (int64_t)avctx->discard_damaged_percentage / 100)
469  return AVERROR_INVALIDDATA;
470 
471 
472  /* fetch the header */
473  header = bytestream2_get_be16(&s->g);
474 
475  /* if a header is present, fetch additional decoding parameters */
476  if (header & 0x0008) {
477  if (avpkt->size < 14) {
478  duplicate = 1;
479  goto done;
480  }
481  start_line = bytestream2_get_be16(&s->g);
482  bytestream2_skip(&s->g, 2);
483  height = bytestream2_get_be16(&s->g);
484  bytestream2_skip(&s->g, 2);
485  if (height > s->avctx->height - start_line) {
486  duplicate = 1;
487  goto done;
488  }
489  } else {
490  start_line = 0;
491  height = s->avctx->height;
492  }
493  if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0)
494  return ret;
495 
496  row_ptr = s->frame->linesize[0] * start_line;
497 
498  switch (avctx->bits_per_coded_sample) {
499  case 1:
500  case 33:
501  qtrle_decode_1bpp(s, row_ptr, height);
502  has_palette = 1;
503  break;
504 
505  case 2:
506  case 34:
507  qtrle_decode_2n4bpp(s, row_ptr, height, 2);
508  has_palette = 1;
509  break;
510 
511  case 4:
512  case 36:
513  qtrle_decode_2n4bpp(s, row_ptr, height, 4);
514  has_palette = 1;
515  break;
516 
517  case 8:
518  case 40:
519  qtrle_decode_8bpp(s, row_ptr, height);
520  has_palette = 1;
521  break;
522 
523  case 16:
524  qtrle_decode_16bpp(s, row_ptr, height);
525  break;
526 
527  case 24:
528  qtrle_decode_24bpp(s, row_ptr, height);
529  break;
530 
531  case 32:
532  qtrle_decode_32bpp(s, row_ptr, height);
533  break;
534 
535  default:
536  av_log (s->avctx, AV_LOG_ERROR, "Unsupported colorspace: %d bits/sample?\n",
537  avctx->bits_per_coded_sample);
538  break;
539  }
540 
541  if(has_palette) {
542  int size;
543  const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &size);
544 
545  if (pal && size == AVPALETTE_SIZE) {
546  s->frame->palette_has_changed = 1;
547  memcpy(s->pal, pal, AVPALETTE_SIZE);
548  } else if (pal) {
549  av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
550  }
551 
552  /* make the palette available on the way out */
553  memcpy(s->frame->data[1], s->pal, AVPALETTE_SIZE);
554  }
555 
556 done:
557  if (!s->frame->data[0])
558  return AVERROR_INVALIDDATA;
559  if (duplicate) {
560  // ff_reget_buffer() isn't needed when frames don't change, so just update
561  // frame props.
562  ret = ff_decode_frame_props(avctx, s->frame);
563  if (ret < 0)
564  return ret;
565  }
566 
567  if ((ret = av_frame_ref(data, s->frame)) < 0)
568  return ret;
569  *got_frame = 1;
570 
571  /* always report that the buffer was completely consumed */
572  return avpkt->size;
573 }
574 
576 {
577  QtrleContext *s = avctx->priv_data;
578 
579  av_frame_unref(s->frame);
580 }
581 
583 {
584  QtrleContext *s = avctx->priv_data;
585 
586  av_frame_free(&s->frame);
587 
588  return 0;
589 }
590 
592  .name = "qtrle",
593  .long_name = NULL_IF_CONFIG_SMALL("QuickTime Animation (RLE) video"),
594  .type = AVMEDIA_TYPE_VIDEO,
595  .id = AV_CODEC_ID_QTRLE,
596  .priv_data_size = sizeof(QtrleContext),
598  .close = qtrle_decode_end,
601  .capabilities = AV_CODEC_CAP_DR1,
602 };
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
int size
This structure describes decoded (raw) audio or video data.
Definition: frame.h:300
GetByteContext g
Definition: qtrle.c:46
static void flush(AVCodecContext *avctx)
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
AVFrame * frame
Definition: qtrle.c:44
int size
Definition: packet.h:356
const char * b
Definition: vf_curves.c:116
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:736
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
static void qtrle_decode_flush(AVCodecContext *avctx)
Definition: qtrle.c:575
static void RENAME() duplicate(uint8_t src[], int stride)
Duplicate the given 8 src pixels ? times upward.
int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame)
Set various frame properties from the codec context / packet data.
Definition: decode.c:1685
AVCodec.
Definition: codec.h:190
#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:71
#define bytestream2_get_ne32
Definition: bytestream.h:117
uint8_t
#define av_cold
Definition: attributes.h:88
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:190
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:444
const char data[16]
Definition: mxf.c:91
AVCodecContext * avctx
Definition: qtrle.c:43
#define height
uint8_t * data
Definition: packet.h:355
static av_cold int qtrle_decode_init(AVCodecContext *avctx)
Definition: qtrle.c:405
static void qtrle_decode_1bpp(QtrleContext *s, int row_ptr, int lines_to_change)
Definition: qtrle.c:57
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:1750
#define av_log(a,...)
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:154
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#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: packet.h:46
#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:353
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
#define bytestream2_get_ne16
Definition: bytestream.h:115
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
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:1960
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:263
const char * name
Name of the codec implementation.
Definition: codec.h:197
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:92
#define bytestream2_get_ne64
Definition: bytestream.h:118
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
int discard_damaged_percentage
The percentage of damaged samples to discard a frame.
Definition: avcodec.h:2336
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:331
main external API structure.
Definition: avcodec.h:526
int palette_has_changed
Tell user application that palette has changed from previous frame.
Definition: frame.h:457
static void qtrle_decode_32bpp(QtrleContext *s, int row_ptr, int lines_to_change)
Definition: qtrle.c:354
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:554
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:314
common internal api header.
#define AV_WN32(p, v)
Definition: intreadwrite.h:376
static int qtrle_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: qtrle.c:447
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:385
void * priv_data
Definition: avcodec.h:553
AVCodec ff_qtrle_decoder
Definition: qtrle.c:591
#define AV_WN16(p, v)
Definition: intreadwrite.h:372
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:582
This structure stores compressed data.
Definition: packet.h:332
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:50
#define AV_WN64(p, v)
Definition: intreadwrite.h:380