FFmpeg
cinepak.c
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1 /*
2  * Cinepak Video Decoder
3  * Copyright (C) 2003 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  * Cinepak video decoder
25  * @author Ewald Snel <ewald@rambo.its.tudelft.nl>
26  *
27  * @see For more information on the Cinepak algorithm, visit:
28  * http://www.csse.monash.edu.au/~timf/
29  * @see For more information on the quirky data inside Sega FILM/CPK files, visit:
30  * http://wiki.multimedia.cx/index.php?title=Sega_FILM
31  *
32  * Cinepak colorspace support (c) 2013 Rl, Aetey Global Technologies AB
33  * @author Cinepak colorspace, Rl, Aetey Global Technologies AB
34  */
35 
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <string.h>
39 
40 #include "libavutil/common.h"
41 #include "libavutil/intreadwrite.h"
42 #include "avcodec.h"
43 #include "codec_internal.h"
44 #include "decode.h"
45 #include "internal.h"
46 
47 
48 typedef uint8_t cvid_codebook[12];
49 
50 #define MAX_STRIPS 32
51 
52 typedef struct cvid_strip {
53  uint16_t id;
54  uint16_t x1, y1;
55  uint16_t x2, y2;
58 } cvid_strip;
59 
60 typedef struct CinepakContext {
61 
64 
65  const unsigned char *data;
66  int size;
67 
68  int width, height;
69 
72 
74 
75  uint32_t pal[256];
77 
79  int chunk_id, int size, const uint8_t *data)
80 {
81  const uint8_t *eod = (data + size);
82  uint32_t flag, mask;
83  int i, n;
84  uint8_t *p;
85 
86  /* check if this chunk contains 4- or 6-element vectors */
87  n = (chunk_id & 0x04) ? 4 : 6;
88  flag = 0;
89  mask = 0;
90 
91  p = codebook[0];
92  for (i=0; i < 256; i++) {
93  if ((chunk_id & 0x01) && !(mask >>= 1)) {
94  if ((data + 4) > eod)
95  break;
96 
97  flag = AV_RB32 (data);
98  data += 4;
99  mask = 0x80000000;
100  }
101 
102  if (!(chunk_id & 0x01) || (flag & mask)) {
103  int k, kk;
104 
105  if ((data + n) > eod)
106  break;
107 
108  for (k = 0; k < 4; ++k) {
109  int r = *data++;
110  for (kk = 0; kk < 3; ++kk)
111  *p++ = r;
112  }
113  if (n == 6) {
114  int r, g, b, u, v;
115  u = *(int8_t *)data++;
116  v = *(int8_t *)data++;
117  p -= 12;
118  for(k=0; k<4; ++k) {
119  r = *p++ + v*2;
120  g = *p++ - (u/2) - v;
121  b = *p + u*2;
122  p -= 2;
123  *p++ = av_clip_uint8(r);
124  *p++ = av_clip_uint8(g);
125  *p++ = av_clip_uint8(b);
126  }
127  }
128  } else {
129  p += 12;
130  }
131  }
132 }
133 
135  int chunk_id, int size, const uint8_t *data)
136 {
137  const uint8_t *eod = (data + size);
138  uint32_t flag, mask;
139  uint8_t *cb0, *cb1, *cb2, *cb3;
140  int x, y;
141  char *ip0, *ip1, *ip2, *ip3;
142 
143  flag = 0;
144  mask = 0;
145 
146  for (y=strip->y1; y < strip->y2; y+=4) {
147 
148 /* take care of y dimension not being multiple of 4, such streams exist */
149  ip0 = ip1 = ip2 = ip3 = s->frame->data[0] +
150  (s->palette_video?strip->x1:strip->x1*3) + (y * s->frame->linesize[0]);
151  if(s->avctx->height - y > 1) {
152  ip1 = ip0 + s->frame->linesize[0];
153  if(s->avctx->height - y > 2) {
154  ip2 = ip1 + s->frame->linesize[0];
155  if(s->avctx->height - y > 3) {
156  ip3 = ip2 + s->frame->linesize[0];
157  }
158  }
159  }
160 /* to get the correct picture for not-multiple-of-4 cases let us fill each
161  * block from the bottom up, thus possibly overwriting the bottommost line
162  * more than once but ending with the correct data in place
163  * (instead of in-loop checking) */
164 
165  for (x=strip->x1; x < strip->x2; x+=4) {
166  if ((chunk_id & 0x01) && !(mask >>= 1)) {
167  if ((data + 4) > eod)
168  return AVERROR_INVALIDDATA;
169 
170  flag = AV_RB32 (data);
171  data += 4;
172  mask = 0x80000000;
173  }
174 
175  if (!(chunk_id & 0x01) || (flag & mask)) {
176  if (!(chunk_id & 0x02) && !(mask >>= 1)) {
177  if ((data + 4) > eod)
178  return AVERROR_INVALIDDATA;
179 
180  flag = AV_RB32 (data);
181  data += 4;
182  mask = 0x80000000;
183  }
184 
185  if ((chunk_id & 0x02) || (~flag & mask)) {
186  uint8_t *p;
187  if (data >= eod)
188  return AVERROR_INVALIDDATA;
189 
190  p = strip->v1_codebook[*data++];
191  if (s->palette_video) {
192  ip3[0] = ip3[1] = ip2[0] = ip2[1] = p[6];
193  ip3[2] = ip3[3] = ip2[2] = ip2[3] = p[9];
194  ip1[0] = ip1[1] = ip0[0] = ip0[1] = p[0];
195  ip1[2] = ip1[3] = ip0[2] = ip0[3] = p[3];
196  } else {
197  p += 6;
198  memcpy(ip3 + 0, p, 3); memcpy(ip3 + 3, p, 3);
199  memcpy(ip2 + 0, p, 3); memcpy(ip2 + 3, p, 3);
200  p += 3; /* ... + 9 */
201  memcpy(ip3 + 6, p, 3); memcpy(ip3 + 9, p, 3);
202  memcpy(ip2 + 6, p, 3); memcpy(ip2 + 9, p, 3);
203  p -= 9; /* ... + 0 */
204  memcpy(ip1 + 0, p, 3); memcpy(ip1 + 3, p, 3);
205  memcpy(ip0 + 0, p, 3); memcpy(ip0 + 3, p, 3);
206  p += 3; /* ... + 3 */
207  memcpy(ip1 + 6, p, 3); memcpy(ip1 + 9, p, 3);
208  memcpy(ip0 + 6, p, 3); memcpy(ip0 + 9, p, 3);
209  }
210 
211  } else if (flag & mask) {
212  if ((data + 4) > eod)
213  return AVERROR_INVALIDDATA;
214 
215  cb0 = strip->v4_codebook[*data++];
216  cb1 = strip->v4_codebook[*data++];
217  cb2 = strip->v4_codebook[*data++];
218  cb3 = strip->v4_codebook[*data++];
219  if (s->palette_video) {
220  uint8_t *p;
221  p = ip3;
222  *p++ = cb2[6];
223  *p++ = cb2[9];
224  *p++ = cb3[6];
225  *p = cb3[9];
226  p = ip2;
227  *p++ = cb2[0];
228  *p++ = cb2[3];
229  *p++ = cb3[0];
230  *p = cb3[3];
231  p = ip1;
232  *p++ = cb0[6];
233  *p++ = cb0[9];
234  *p++ = cb1[6];
235  *p = cb1[9];
236  p = ip0;
237  *p++ = cb0[0];
238  *p++ = cb0[3];
239  *p++ = cb1[0];
240  *p = cb1[3];
241  } else {
242  memcpy(ip3 + 0, cb2 + 6, 6);
243  memcpy(ip3 + 6, cb3 + 6, 6);
244  memcpy(ip2 + 0, cb2 + 0, 6);
245  memcpy(ip2 + 6, cb3 + 0, 6);
246  memcpy(ip1 + 0, cb0 + 6, 6);
247  memcpy(ip1 + 6, cb1 + 6, 6);
248  memcpy(ip0 + 0, cb0 + 0, 6);
249  memcpy(ip0 + 6, cb1 + 0, 6);
250  }
251 
252  }
253  }
254 
255  if (s->palette_video) {
256  ip0 += 4; ip1 += 4;
257  ip2 += 4; ip3 += 4;
258  } else {
259  ip0 += 12; ip1 += 12;
260  ip2 += 12; ip3 += 12;
261  }
262  }
263  }
264 
265  return 0;
266 }
267 
269  cvid_strip *strip, const uint8_t *data, int size)
270 {
271  const uint8_t *eod = (data + size);
272  int chunk_id, chunk_size;
273 
274  /* coordinate sanity checks */
275  if (strip->x2 > s->width ||
276  strip->y2 > s->height ||
277  strip->x1 >= strip->x2 || strip->y1 >= strip->y2)
278  return AVERROR_INVALIDDATA;
279 
280  while ((data + 4) <= eod) {
281  chunk_id = data[0];
282  chunk_size = AV_RB24 (&data[1]) - 4;
283  if(chunk_size < 0)
284  return AVERROR_INVALIDDATA;
285 
286  data += 4;
287  chunk_size = ((data + chunk_size) > eod) ? (eod - data) : chunk_size;
288 
289  switch (chunk_id) {
290 
291  case 0x20:
292  case 0x21:
293  case 0x24:
294  case 0x25:
295  cinepak_decode_codebook (strip->v4_codebook, chunk_id,
296  chunk_size, data);
297  break;
298 
299  case 0x22:
300  case 0x23:
301  case 0x26:
302  case 0x27:
303  cinepak_decode_codebook (strip->v1_codebook, chunk_id,
304  chunk_size, data);
305  break;
306 
307  case 0x30:
308  case 0x31:
309  case 0x32:
310  return cinepak_decode_vectors (s, strip, chunk_id,
311  chunk_size, data);
312  }
313 
314  data += chunk_size;
315  }
316 
317  return AVERROR_INVALIDDATA;
318 }
319 
321 {
322  int num_strips;
323  int encoded_buf_size;
324 
325  num_strips = AV_RB16 (&s->data[8]);
326  encoded_buf_size = AV_RB24(&s->data[1]);
327 
328  if (s->size < encoded_buf_size * (int64_t)(100 - s->avctx->discard_damaged_percentage) / 100)
329  return AVERROR_INVALIDDATA;
330 
331  /* if this is the first frame, check for deviant Sega FILM data */
332  if (s->sega_film_skip_bytes == -1) {
333  if (!encoded_buf_size) {
334  avpriv_request_sample(s->avctx, "encoded_buf_size 0");
335  return AVERROR_PATCHWELCOME;
336  }
337  if (encoded_buf_size != s->size && (s->size % encoded_buf_size) != 0) {
338  /* If the encoded frame size differs from the frame size as indicated
339  * by the container file, this data likely comes from a Sega FILM/CPK file.
340  * If the frame header is followed by the bytes FE 00 00 06 00 00 then
341  * this is probably one of the two known files that have 6 extra bytes
342  * after the frame header. Else, assume 2 extra bytes. The container
343  * size also cannot be a multiple of the encoded size. */
344  if (s->size >= 16 &&
345  (s->data[10] == 0xFE) &&
346  (s->data[11] == 0x00) &&
347  (s->data[12] == 0x00) &&
348  (s->data[13] == 0x06) &&
349  (s->data[14] == 0x00) &&
350  (s->data[15] == 0x00))
351  s->sega_film_skip_bytes = 6;
352  else
353  s->sega_film_skip_bytes = 2;
354  } else
355  s->sega_film_skip_bytes = 0;
356  }
357 
358  if (s->size < 10 + s->sega_film_skip_bytes + num_strips * 12)
359  return AVERROR_INVALIDDATA;
360 
361  if (num_strips) {
362  const uint8_t *data = s->data + 10 + s->sega_film_skip_bytes;
363  int strip_size = AV_RB24 (data + 1);
364  if (strip_size < 12 || strip_size > encoded_buf_size)
365  return AVERROR_INVALIDDATA;
366  }
367 
368  return 0;
369 }
370 
372 {
373  const uint8_t *eod = (s->data + s->size);
374  int i, result, strip_size, frame_flags, num_strips;
375  int y0 = 0;
376 
377  frame_flags = s->data[0];
378  num_strips = AV_RB16 (&s->data[8]);
379 
380  s->data += 10 + s->sega_film_skip_bytes;
381 
382  num_strips = FFMIN(num_strips, MAX_STRIPS);
383 
384  s->frame->key_frame = 0;
385 
386  for (i=0; i < num_strips; i++) {
387  if ((s->data + 12) > eod)
388  return AVERROR_INVALIDDATA;
389 
390  s->strips[i].id = s->data[0];
391 /* zero y1 means "relative to the previous stripe" */
392  if (!(s->strips[i].y1 = AV_RB16 (&s->data[4])))
393  s->strips[i].y2 = (s->strips[i].y1 = y0) + AV_RB16 (&s->data[8]);
394  else
395  s->strips[i].y2 = AV_RB16 (&s->data[8]);
396  s->strips[i].x1 = AV_RB16 (&s->data[6]);
397  s->strips[i].x2 = AV_RB16 (&s->data[10]);
398 
399  if (s->strips[i].id == 0x10)
400  s->frame->key_frame = 1;
401 
402  strip_size = AV_RB24 (&s->data[1]) - 12;
403  if (strip_size < 0)
404  return AVERROR_INVALIDDATA;
405  s->data += 12;
406  strip_size = ((s->data + strip_size) > eod) ? (eod - s->data) : strip_size;
407 
408  if ((i > 0) && !(frame_flags & 0x01)) {
409  memcpy (s->strips[i].v4_codebook, s->strips[i-1].v4_codebook,
410  sizeof(s->strips[i].v4_codebook));
411  memcpy (s->strips[i].v1_codebook, s->strips[i-1].v1_codebook,
412  sizeof(s->strips[i].v1_codebook));
413  }
414 
415  result = cinepak_decode_strip (s, &s->strips[i], s->data, strip_size);
416 
417  if (result != 0)
418  return result;
419 
420  s->data += strip_size;
421  y0 = s->strips[i].y2;
422  }
423  return 0;
424 }
425 
427 {
428  CinepakContext *s = avctx->priv_data;
429 
430  s->avctx = avctx;
431  s->width = (avctx->width + 3) & ~3;
432  s->height = (avctx->height + 3) & ~3;
433 
434  s->sega_film_skip_bytes = -1; /* uninitialized state */
435 
436  // check for paletted data
437  if (avctx->bits_per_coded_sample != 8) {
438  s->palette_video = 0;
439  avctx->pix_fmt = AV_PIX_FMT_RGB24;
440  } else {
441  s->palette_video = 1;
442  avctx->pix_fmt = AV_PIX_FMT_PAL8;
443  }
444 
445  s->frame = av_frame_alloc();
446  if (!s->frame)
447  return AVERROR(ENOMEM);
448 
449  return 0;
450 }
451 
452 static int cinepak_decode_frame(AVCodecContext *avctx, AVFrame *rframe,
453  int *got_frame, AVPacket *avpkt)
454 {
455  const uint8_t *buf = avpkt->data;
456  int ret = 0, buf_size = avpkt->size;
457  CinepakContext *s = avctx->priv_data;
458  int num_strips;
459 
460  s->data = buf;
461  s->size = buf_size;
462 
463  if (s->size < 10)
464  return AVERROR_INVALIDDATA;
465 
466  num_strips = AV_RB16 (&s->data[8]);
467 
468  //Empty frame, do not waste time
469  if (!num_strips && (!s->palette_video || !av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL)))
470  return buf_size;
471 
472  if ((ret = cinepak_predecode_check(s)) < 0) {
473  av_log(avctx, AV_LOG_ERROR, "cinepak_predecode_check failed\n");
474  return ret;
475  }
476 
477  if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0)
478  return ret;
479 
480  if (s->palette_video) {
481  s->frame->palette_has_changed = ff_copy_palette(s->pal, avpkt, avctx);
482  }
483 
484  if ((ret = cinepak_decode(s)) < 0) {
485  av_log(avctx, AV_LOG_ERROR, "cinepak_decode failed\n");
486  }
487 
488  if (s->palette_video)
489  memcpy (s->frame->data[1], s->pal, AVPALETTE_SIZE);
490 
491  if ((ret = av_frame_ref(rframe, s->frame)) < 0)
492  return ret;
493 
494  *got_frame = 1;
495 
496  /* report that the buffer was completely consumed */
497  return buf_size;
498 }
499 
501 {
502  CinepakContext *s = avctx->priv_data;
503 
504  av_frame_free(&s->frame);
505 
506  return 0;
507 }
508 
510  .p.name = "cinepak",
511  .p.long_name = NULL_IF_CONFIG_SMALL("Cinepak"),
512  .p.type = AVMEDIA_TYPE_VIDEO,
513  .p.id = AV_CODEC_ID_CINEPAK,
514  .priv_data_size = sizeof(CinepakContext),
516  .close = cinepak_decode_end,
518  .p.capabilities = AV_CODEC_CAP_DR1,
519 };
r
const char * r
Definition: vf_curves.c:116
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
cvid_strip::y1
uint16_t y1
Definition: cinepak.c:54
u
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:262
CinepakContext::height
int height
Definition: cinepak.c:68
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:116
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:374
b
#define b
Definition: input.c:34
AV_PKT_DATA_PALETTE
@ AV_PKT_DATA_PALETTE
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette.
Definition: packet.h:47
data
const char data[16]
Definition: mxf.c:146
FFCodec
Definition: codec_internal.h:118
cvid_strip::y2
uint16_t y2
Definition: cinepak.c:55
CinepakContext::avctx
AVCodecContext * avctx
Definition: cinepak.c:62
init
static int init
Definition: av_tx.c:47
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:122
cvid_codebook
uint8_t cvid_codebook[12]
Definition: cinepak.c:48
cinepak_predecode_check
static int cinepak_predecode_check(CinepakContext *s)
Definition: cinepak.c:320
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:104
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
mask
static const uint16_t mask[17]
Definition: lzw.c:38
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:260
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:256
g
const char * g
Definition: vf_curves.c:117
CinepakContext::sega_film_skip_bytes
int sega_film_skip_bytes
Definition: cinepak.c:73
cinepak_decode_strip
static int cinepak_decode_strip(CinepakContext *s, cvid_strip *strip, const uint8_t *data, int size)
Definition: cinepak.c:268
MAX_STRIPS
#define MAX_STRIPS
Definition: cinepak.c:50
decode.h
cvid_strip::v1_codebook
cvid_codebook v1_codebook[256]
Definition: cinepak.c:57
result
and forward the result(frame or status change) to the corresponding input. If nothing is possible
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
AV_CODEC_ID_CINEPAK
@ AV_CODEC_ID_CINEPAK
Definition: codec_id.h:93
AVPALETTE_SIZE
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
cvid_strip::v4_codebook
cvid_codebook v4_codebook[256]
Definition: cinepak.c:56
cvid_strip::x2
uint16_t x2
Definition: cinepak.c:55
cinepak_decode_frame
static int cinepak_decode_frame(AVCodecContext *avctx, AVFrame *rframe, int *got_frame, AVPacket *avpkt)
Definition: cinepak.c:452
cinepak_decode_codebook
static void cinepak_decode_codebook(cvid_codebook *codebook, int chunk_id, int size, const uint8_t *data)
Definition: cinepak.c:78
AV_PIX_FMT_RGB24
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
cvid_strip::x1
uint16_t x1
Definition: cinepak.c:54
AVPacket::size
int size
Definition: packet.h:375
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
av_frame_ref
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:353
codec_internal.h
cvid_strip::id
uint16_t id
Definition: cinepak.c:53
size
int size
Definition: twinvq_data.h:10344
AV_RB32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:96
ff_cinepak_decoder
const FFCodec ff_cinepak_decoder
Definition: cinepak.c:509
cinepak_decode_init
static av_cold int cinepak_decode_init(AVCodecContext *avctx)
Definition: cinepak.c:426
cvid_strip
Definition: cinepak.c:52
flag
#define flag(name)
Definition: cbs_av1.c:553
AVCodecContext::bits_per_coded_sample
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:1450
CinepakContext::width
int width
Definition: cinepak.c:68
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
av_packet_get_side_data
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, size_t *size)
Get side information from packet.
Definition: avpacket.c:251
common.h
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
CinepakContext::pal
uint32_t pal[256]
Definition: cinepak.c:75
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:211
AVCodecContext::height
int height
Definition: avcodec.h:571
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:608
avcodec.h
AV_PIX_FMT_PAL8
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:77
cinepak_decode_vectors
static int cinepak_decode_vectors(CinepakContext *s, cvid_strip *strip, int chunk_id, int size, const uint8_t *data)
Definition: cinepak.c:134
ff_reget_buffer
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:1580
ret
ret
Definition: filter_design.txt:187
CinepakContext
Definition: cinepak.c:60
CinepakContext::size
int size
Definition: cinepak.c:66
AVCodecContext
main external API structure.
Definition: avcodec.h:398
cinepak_decode_end
static av_cold int cinepak_decode_end(AVCodecContext *avctx)
Definition: cinepak.c:500
av_clip_uint8
#define av_clip_uint8
Definition: common.h:101
CinepakContext::palette_video
int palette_video
Definition: cinepak.c:70
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:36
AVPacket
This structure stores compressed data.
Definition: packet.h:351
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:425
CinepakContext::strips
cvid_strip strips[MAX_STRIPS]
Definition: cinepak.c:71
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:571
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
ff_copy_palette
int ff_copy_palette(void *dst, const AVPacket *src, void *logctx)
Check whether the side-data of src contains a palette of size AVPALETTE_SIZE; if so,...
Definition: decode.c:1683
cinepak_decode
static int cinepak_decode(CinepakContext *s)
Definition: cinepak.c:371
AV_RB24
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_RB24
Definition: bytestream.h:97
CinepakContext::frame
AVFrame * frame
Definition: cinepak.c:63
CinepakContext::data
const unsigned char * data
Definition: cinepak.c:65
codebook
static const unsigned codebook[256][2]
Definition: cfhdenc.c:42
AV_RB16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:98