FFmpeg  4.4.4
photocd.c
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1 /*
2  * Kodak PhotoCD (a.k.a. ImagePac) image decoder
3  *
4  * Copyright (c) 1996-2002 Gerd Knorr
5  * Copyright (c) 2010 Kenneth Vermeirsch
6  * Copyright (c) 2020 Paul B Mahol
7  *
8  * This file is part of FFmpeg.
9  *
10  * FFmpeg is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * FFmpeg is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with FFmpeg; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
25 /**
26  * @file
27  * Kodak PhotoCD (a.k.a. ImagePac) image decoder
28  *
29  * Supports resolutions up to 3072x2048.
30  */
31 
32 #define CACHED_BITSTREAM_READER !ARCH_X86_32
33 
34 #include "libavutil/avassert.h"
35 #include "libavutil/intreadwrite.h"
36 #include "libavutil/opt.h"
37 #include "avcodec.h"
38 #include "bytestream.h"
39 #include "get_bits.h"
40 #include "internal.h"
41 #include "thread.h"
42 
43 typedef struct PhotoCDContext {
44  AVClass *class;
45  int lowres;
46 
48  int thumbnails; //* number of thumbnails; 0 for normal image */
51 
52  int streampos;
53 
54  uint8_t bits[256];
55  uint16_t codes[256];
56  uint8_t syms[256];
57 
58  VLC vlc[3];
60 
61 typedef struct ImageInfo {
62  uint32_t start;
63  uint16_t width, height;
64 } ImageInfo;
65 
66 static const ImageInfo img_info[6] = {
67  {8192, 192, 128},
68  {47104, 384, 256},
69  {196608, 768, 512},
70  {0, 1536, 1024},
71  {0, 3072, 2048},
72  {0, 6144, 4096},
73 };
74 
76  int width, int height)
77 {
78  GetByteContext *gb = &s->gb;
79  int start = s->streampos + img_info[2].start;
80  uint8_t *ptr, *ptr1, *ptr2;
81  uint8_t *dst;
82  int fill;
83 
84  ptr = picture->data[0];
85  ptr1 = picture->data[1];
86  ptr2 = picture->data[2];
87 
88  bytestream2_seek(gb, start, SEEK_SET);
89 
90  for (int y = 0; y < height; y += 2) {
91  dst = ptr;
92  for (int x = 0; x < width - 1; x++) {
93  fill = bytestream2_get_byte(gb);
94  *(dst++) = fill;
95  *(dst++) = (fill + bytestream2_peek_byte(gb) + 1) >> 1;
96  }
97  fill = bytestream2_get_byte(gb);
98  *(dst++) = fill;
99  *(dst++) = fill;
100 
101  ptr += picture->linesize[0] << 1;
102 
103  dst = ptr;
104  for (int x = 0; x < width - 1; x++) {
105  fill = bytestream2_get_byte(gb);
106  *(dst++) = fill;
107  *(dst++) = (fill + bytestream2_peek_byte(gb) + 1) >> 1;
108  }
109  fill = bytestream2_get_byte(gb);
110  *(dst++) = fill;
111  *(dst++) = fill;
112 
113  ptr += picture->linesize[0] << 1;
114 
115  dst = ptr1;
116  for (int x = 0; x < (width >> 1) - 1; x++) {
117  fill = bytestream2_get_byte(gb);
118  *(dst++) = fill;
119  *(dst++) = (fill + bytestream2_peek_byte(gb) + 1) >> 1;
120  }
121  fill = bytestream2_get_byte(gb);
122  *(dst++) = fill;
123  *(dst++) = fill;
124 
125  ptr1 += picture->linesize[1] << 1;
126 
127  dst = ptr2;
128  for (int x = 0; x < (width >> 1) - 1; x++) {
129  fill = bytestream2_get_byte(gb);
130  *(dst++) = fill;
131  *(dst++) = (fill + bytestream2_peek_byte(gb) + 1) >> 1;
132  }
133  fill = bytestream2_get_byte(gb);
134  *(dst++) = fill;
135  *(dst++) = fill;
136 
137  ptr2 += picture->linesize[2] << 1;
138  }
139 
140  s->streampos += bytestream2_tell(gb) - start;
141 }
142 
143 static av_noinline void interp_lines(uint8_t *ptr, int linesize,
144  int width, int height)
145 {
146  const uint8_t *src1;
147  uint8_t *dst;
148  int x;
149 
150  for (int y = 0; y < height - 2; y += 2) {
151  const uint8_t *src1 = ptr;
152  uint8_t *dst = ptr + linesize;
153  const uint8_t *src2 = dst + linesize;
154  for (x = 0; x < width - 2; x += 2) {
155  dst[x] = (src1[x] + src2[x] + 1) >> 1;
156  dst[x + 1] = (src1[x] + src2[x] + src1[x + 2] + src2[x + 2] + 2) >> 2;
157  }
158  dst[x] = dst[x + 1] = (src1[x] + src2[x] + 1) >> 1;
159 
160  ptr += linesize << 1;
161  }
162 
163  src1 = ptr;
164  dst = ptr + linesize;
165  for (x = 0; x < width - 2; x += 2) {
166  dst[x] = src1[x];
167  dst[x + 1] = (src1[x] + src1[x + 2] + 1) >> 1;
168  }
169  dst[x] = dst[x + 1] = src1[x];
170 }
171 
172 static av_noinline void interp_pixels(uint8_t *ptr, int linesize,
173  int width, int height)
174 {
175  for (int y = height - 2; y >= 0; y -= 2) {
176  const uint8_t *src = ptr + (y >> 1) * linesize;
177  uint8_t *dst = ptr + y * linesize;
178 
179  dst[width - 2] = dst[width - 1] = src[(width >> 1) - 1];
180  for (int x = width - 4; x >= 0; x -= 2) {
181  dst[x] = src[x >> 1];
182  dst[x + 1] = (src[x >> 1] + src[(x >> 1) + 1] + 1) >> 1;
183  }
184  }
185 }
186 
188 {
189  PhotoCDContext *s = avctx->priv_data;
190  GetByteContext *gb = &s->gb;
191  int start = s->streampos;
192  int count, ret;
193 
194  bytestream2_seek(gb, start, SEEK_SET);
195 
196  count = bytestream2_get_byte(gb) + 1;
197  if (bytestream2_get_bytes_left(gb) < count * 4)
198  return AVERROR_INVALIDDATA;
199 
200  for (int j = 0; j < count; j++) {
201  const int bit = bytestream2_get_byteu(gb) + 1;
202  const int code = bytestream2_get_be16u(gb);
203  const int sym = bytestream2_get_byteu(gb);
204 
205  if (bit > 16)
206  return AVERROR_INVALIDDATA;
207 
208  s->bits[j] = bit;
209  s->codes[j] = code >> (16 - bit);
210  s->syms[j] = sym;
211  }
212 
213  ff_free_vlc(vlc);
214  ret = ff_init_vlc_sparse(vlc, 12, count,
215  s->bits, sizeof(*s->bits), sizeof(*s->bits),
216  s->codes, sizeof(*s->codes), sizeof(*s->codes),
217  s->syms, sizeof(*s->syms), sizeof(*s->syms), 0);
218 
219  s->streampos = bytestream2_tell(gb);
220 
221  return ret;
222 }
223 
225  int target_res, int curr_res)
226 {
227  PhotoCDContext *s = avctx->priv_data;
229  GetByteContext *gb = &s->gb;
230  int ret, y = 0, type, height;
231  int start = s->streampos;
232  unsigned shiftreg;
233  const int scaling = target_res - curr_res;
234  const uint8_t type2idx[] = { 0, 0xff, 1, 2 };
235 
236  bytestream2_seek(gb, start, SEEK_SET);
238  if (ret < 0)
239  return ret;
240 
241  height = img_info[curr_res].height;
242 
243  while (y < height) {
244  uint8_t *data;
245  int x2, idx;
246 
247  for (; get_bits_left(&g) > 0;) {
248  if (show_bits(&g, 12) == 0xfff)
249  break;
250  skip_bits(&g, 8);
251  }
252 
253  shiftreg = show_bits(&g, 24);
254  while (shiftreg != 0xfffffe) {
255  if (get_bits_left(&g) <= 0)
256  return AVERROR_INVALIDDATA;
257  skip_bits(&g, 1);
258  shiftreg = show_bits(&g, 24);
259  }
260  skip_bits(&g, 24);
261  y = show_bits(&g, 15) & 0x1fff;
262  if (y >= height)
263  break;
264  type = get_bits(&g, 2);
265  skip_bits(&g, 14);
266 
267  if (type == 1)
268  return AVERROR_INVALIDDATA;
269  idx = type2idx[type];
270 
271  data = frame->data[idx] + (y >> !!idx) * frame->linesize[idx];
272 
273  x2 = avctx->width >> (scaling + !!idx);
274  for (int x = 0; x < x2; x++) {
275  int m;
276 
277  if (get_bits_left(&g) <= 0)
278  return AVERROR_INVALIDDATA;
279  m = get_vlc2(&g, s->vlc[idx].table, s->vlc[idx].bits, 2);
280  if (m < 0)
281  return AVERROR_INVALIDDATA;
282  m = sign_extend(m, 8);
283  data[x] = av_clip_uint8(data[x] + m);
284  }
285  }
286 
287  s->streampos += (get_bits_count(&g) + 7) >> 3;
288  s->streampos = (s->streampos + 0x6000 + 2047) & ~0x7ff;
289 
290  return 0;
291 }
292 
293 static int photocd_decode_frame(AVCodecContext *avctx, void *data,
294  int *got_frame, AVPacket *avpkt)
295 {
296  PhotoCDContext *s = avctx->priv_data;
297  ThreadFrame frame = { .f = data };
298  const uint8_t *buf = avpkt->data;
299  GetByteContext *gb = &s->gb;
300  AVFrame *p = data;
301  uint8_t *ptr, *ptr1, *ptr2;
302  int ret;
303 
304  if (avpkt->size < img_info[0].start)
305  return AVERROR_INVALIDDATA;
306 
307  if (!memcmp("PCD_OPA", buf, 7)) {
308  s->thumbnails = AV_RL16(buf + 10);
309  av_log(avctx, AV_LOG_WARNING, "this is a thumbnails file, "
310  "reading first thumbnail only\n");
311  } else if (avpkt->size < 786432) {
312  return AVERROR_INVALIDDATA;
313  } else if (memcmp("PCD_IPI", buf + 0x800, 7)) {
314  return AVERROR_INVALIDDATA;
315  }
316 
317  s->orientation = s->thumbnails ? buf[12] & 3 : buf[0x48] & 3;
318 
319  if (s->thumbnails)
320  s->resolution = 0;
321  else if (avpkt->size <= 788480)
322  s->resolution = 2;
323  else
324  s->resolution = av_clip(4 - s->lowres, 0, 4);
325 
326  ret = ff_set_dimensions(avctx, img_info[s->resolution].width, img_info[s->resolution].height);
327  if (ret < 0)
328  return ret;
329 
330  if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
331  return ret;
332 
334  p->key_frame = 1;
335 
336  bytestream2_init(gb, avpkt->data, avpkt->size);
337 
338  if (s->resolution < 3) {
339  ptr = p->data[0];
340  ptr1 = p->data[1];
341  ptr2 = p->data[2];
342 
343  if (s->thumbnails)
344  bytestream2_seek(gb, 10240, SEEK_SET);
345  else
346  bytestream2_seek(gb, img_info[s->resolution].start, SEEK_SET);
347 
348  for (int y = 0; y < avctx->height; y += 2) {
349  bytestream2_get_buffer(gb, ptr, avctx->width);
350  ptr += p->linesize[0];
351 
352  bytestream2_get_buffer(gb, ptr, avctx->width);
353  ptr += p->linesize[0];
354 
355  bytestream2_get_buffer(gb, ptr1, avctx->width >> 1);
356  ptr1 += p->linesize[1];
357 
358  bytestream2_get_buffer(gb, ptr2, avctx->width >> 1);
359  ptr2 += p->linesize[2];
360  }
361  } else {
362  s->streampos = 0;
363  ptr = p->data[0];
364  ptr1 = p->data[1];
365  ptr2 = p->data[2];
366 
368 
369  interp_lines(ptr1, p->linesize[1], img_info[2].width, img_info[2].height);
370  interp_lines(ptr2, p->linesize[2], img_info[2].width, img_info[2].height);
371 
372  if (s->resolution == 4) {
373  interp_pixels(ptr1, p->linesize[1], img_info[3].width, img_info[3].height);
374  interp_lines (ptr1, p->linesize[1], img_info[3].width, img_info[3].height);
375  interp_pixels(ptr2, p->linesize[2], img_info[3].width, img_info[3].height);
376  interp_lines (ptr2, p->linesize[2], img_info[3].width, img_info[3].height);
377  }
378 
379  interp_lines(ptr, p->linesize[0], img_info[3].width, img_info[3].height);
380 
381  s->streampos = 0xc2000;
382  for (int n = 0; n < 3; n++) {
383  if ((ret = read_hufftable(avctx, &s->vlc[n])) < 0)
384  return ret;
385  }
386  s->streampos = (s->streampos + 2047) & ~0x3ff;
387  if (decode_huff(avctx, p, s->resolution, 3) < 0)
388  return AVERROR_INVALIDDATA;
389 
390  if (s->resolution == 4) {
391  interp_pixels(ptr, p->linesize[0], img_info[4].width, img_info[4].height);
392  interp_lines (ptr, p->linesize[0], img_info[4].width, img_info[4].height);
393 
394  for (int n = 0; n < 3; n++) {
395  if ((ret = read_hufftable(avctx, &s->vlc[n])) < 0)
396  return ret;
397  }
398  s->streampos = (s->streampos + 2047) & ~0x3ff;
399  if (decode_huff(avctx, p, 4, 4) < 0)
400  return AVERROR_INVALIDDATA;
401  }
402  }
403 
404  {
405  ptr1 = p->data[1];
406  ptr2 = p->data[2];
407 
408  for (int y = 0; y < avctx->height >> 1; y++) {
409  for (int x = 0; x < avctx->width >> 1; x++) {
410  ptr1[x] = av_clip_uint8(ptr1[x] - 28);
411  ptr2[x] = av_clip_uint8(ptr2[x] - 9);
412  }
413 
414  ptr1 += p->linesize[1];
415  ptr2 += p->linesize[2];
416  }
417  }
418 
419  *got_frame = 1;
420 
421  return 0;
422 }
423 
425 {
426  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
427  avctx->colorspace = AVCOL_SPC_BT709;
430  avctx->color_range = AVCOL_RANGE_JPEG;
431 
432  return 0;
433 }
434 
436 {
437  PhotoCDContext *s = avctx->priv_data;
438 
439  for (int i = 0; i < 3; i++)
440  ff_free_vlc(&s->vlc[i]);
441 
442  return 0;
443 }
444 
445 #define OFFSET(x) offsetof(PhotoCDContext, x)
446 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
447 
448 static const AVOption options[] = {
449  { "lowres", "Lower the decoding resolution by a power of two",
450  OFFSET(lowres), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 4, VD },
451  { NULL },
452 };
453 
454 static const AVClass photocd_class = {
455  .class_name = "photocd",
456  .item_name = av_default_item_name,
457  .option = options,
458  .version = LIBAVUTIL_VERSION_INT,
459 };
460 
462  .name = "photocd",
463  .type = AVMEDIA_TYPE_VIDEO,
464  .id = AV_CODEC_ID_PHOTOCD,
465  .priv_data_size = sizeof(PhotoCDContext),
466  .priv_class = &photocd_class,
468  .close = photocd_decode_close,
471  .long_name = NULL_IF_CONFIG_SMALL("Kodak Photo CD"),
472  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
473 };
#define av_noinline
Definition: attributes.h:68
#define av_cold
Definition: attributes.h:88
uint8_t
simple assert() macros that are a bit more flexible than ISO C assert().
Libavcodec external API header.
#define AV_RL16
Definition: intreadwrite.h:42
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
int ff_init_vlc_sparse(VLC *vlc_arg, int nb_bits, int nb_codes, const void *bits, int bits_wrap, int bits_size, const void *codes, int codes_wrap, int codes_size, const void *symbols, int symbols_wrap, int symbols_size, int flags)
Definition: bitstream.c:323
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:431
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
static av_always_inline int bytestream2_seek(GetByteContext *g, int offset, int whence)
Definition: bytestream.h:212
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:192
#define bit(string, value)
Definition: cbs_mpeg2.c:58
#define s(width, name)
Definition: cbs_vp9.c:257
#define av_clip
Definition: common.h:122
#define av_clip_uint8
Definition: common.h:128
#define NULL
Definition: coverity.c:32
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
static AVFrame * frame
static int lowres
Definition: ffplay.c:336
bitstream reader API header.
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:797
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:467
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:677
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:446
@ AV_OPT_TYPE_INT
Definition: opt.h:225
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:108
@ AV_CODEC_ID_PHOTOCD
Definition: codec_id.h:304
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
cl_device_type type
int i
Definition: input.c:407
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:41
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:84
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:130
const char data[16]
Definition: mxf.c:142
AVOptions.
static av_noinline int decode_huff(AVCodecContext *avctx, AVFrame *frame, int target_res, int curr_res)
Definition: photocd.c:224
AVCodec ff_photocd_decoder
Definition: photocd.c:461
static av_noinline int read_hufftable(AVCodecContext *avctx, VLC *vlc)
Definition: photocd.c:187
static const AVOption options[]
Definition: photocd.c:448
static av_cold int photocd_decode_close(AVCodecContext *avctx)
Definition: photocd.c:435
static av_noinline void interp_lines(uint8_t *ptr, int linesize, int width, int height)
Definition: photocd.c:143
static const AVClass photocd_class
Definition: photocd.c:454
#define VD
Definition: photocd.c:446
static const ImageInfo img_info[6]
Definition: photocd.c:66
static av_noinline void interp_lowres(PhotoCDContext *s, AVFrame *picture, int width, int height)
Definition: photocd.c:75
#define OFFSET(x)
Definition: photocd.c:445
static av_cold int photocd_decode_init(AVCodecContext *avctx)
Definition: photocd.c:424
static av_noinline void interp_pixels(uint8_t *ptr, int linesize, int width, int height)
Definition: photocd.c:172
static int photocd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: photocd.c:293
@ AVCOL_RANGE_JPEG
Full range content.
Definition: pixfmt.h:586
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
@ AVCOL_PRI_BT709
also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
Definition: pixfmt.h:460
@ AVCOL_TRC_IEC61966_2_1
IEC 61966-2-1 (sRGB or sYCC)
Definition: pixfmt.h:497
@ AVCOL_SPC_BT709
also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
Definition: pixfmt.h:514
FF_ENABLE_DEPRECATION_WARNINGS int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
const uint8_t * code
Definition: spdifenc.c:413
Describe the class of an AVClass context structure.
Definition: log.h:67
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
main external API structure.
Definition: avcodec.h:536
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:746
int width
picture width / height.
Definition: avcodec.h:709
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:1171
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:1150
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:1164
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:1157
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
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:332
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:396
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:349
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:401
AVOption.
Definition: opt.h:248
This structure stores compressed data.
Definition: packet.h:346
int size
Definition: packet.h:370
uint8_t * data
Definition: packet.h:369
const uint8_t * buffer
Definition: bytestream.h:34
uint16_t width
Definition: photocd.c:63
uint16_t height
Definition: photocd.c:63
uint32_t start
Definition: photocd.c:62
int orientation
Definition: photocd.c:50
uint8_t syms[256]
Definition: photocd.c:56
GetByteContext gb
Definition: photocd.c:47
int resolution
Definition: photocd.c:49
uint16_t codes[256]
Definition: photocd.c:55
int streampos
Definition: photocd.c:52
uint8_t bits[256]
Definition: photocd.c:54
VLC vlc[3]
Definition: photocd.c:58
int thumbnails
Definition: photocd.c:48
Definition: vlc.h:26
#define av_log(a,...)
#define src1
Definition: h264pred.c:140
#define src
Definition: vp8dsp.c:255
#define height
#define width
const char * g
Definition: vf_curves.c:117