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yuv4mpegdec.c
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1 /*
2  * YUV4MPEG demuxer
3  * Copyright (c) 2001, 2002, 2003 Fabrice Bellard
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 #include "libavutil/imgutils.h"
23 
24 #include "avformat.h"
25 #include "internal.h"
26 #include "yuv4mpeg.h"
27 
28 /* Header size increased to allow room for optional flags */
29 #define MAX_YUV4_HEADER 80
30 #define MAX_FRAME_HEADER 80
31 
33 {
34  char header[MAX_YUV4_HEADER + 10]; // Include headroom for
35  // the longest option
36  char *tokstart, *tokend, *header_end;
37  int i;
38  AVIOContext *pb = s->pb;
39  int width = -1, height = -1, raten = 0,
40  rated = 0, aspectn = 0, aspectd = 0;
42  enum AVChromaLocation chroma_sample_location = AVCHROMA_LOC_UNSPECIFIED;
43  enum AVFieldOrder field_order = AV_FIELD_UNKNOWN;
45  AVStream *st;
46 
47  for (i = 0; i < MAX_YUV4_HEADER; i++) {
48  header[i] = avio_r8(pb);
49  if (header[i] == '\n') {
50  header[i + 1] = 0x20; // Add a space after last option.
51  // Makes parsing "444" vs "444alpha" easier.
52  header[i + 2] = 0;
53  break;
54  }
55  }
56  if (i == MAX_YUV4_HEADER)
57  return -1;
58  if (strncmp(header, Y4M_MAGIC, strlen(Y4M_MAGIC)))
59  return -1;
60 
61  header_end = &header[i + 1]; // Include space
62  for (tokstart = &header[strlen(Y4M_MAGIC) + 1];
63  tokstart < header_end; tokstart++) {
64  if (*tokstart == 0x20)
65  continue;
66  switch (*tokstart++) {
67  case 'W': // Width. Required.
68  width = strtol(tokstart, &tokend, 10);
69  tokstart = tokend;
70  break;
71  case 'H': // Height. Required.
72  height = strtol(tokstart, &tokend, 10);
73  tokstart = tokend;
74  break;
75  case 'C': // Color space
76  if (strncmp("420jpeg", tokstart, 7) == 0) {
77  pix_fmt = AV_PIX_FMT_YUV420P;
78  chroma_sample_location = AVCHROMA_LOC_CENTER;
79  } else if (strncmp("420mpeg2", tokstart, 8) == 0) {
80  pix_fmt = AV_PIX_FMT_YUV420P;
81  chroma_sample_location = AVCHROMA_LOC_LEFT;
82  } else if (strncmp("420paldv", tokstart, 8) == 0) {
83  pix_fmt = AV_PIX_FMT_YUV420P;
84  chroma_sample_location = AVCHROMA_LOC_TOPLEFT;
85  } else if (strncmp("420p16", tokstart, 6) == 0) {
86  pix_fmt = AV_PIX_FMT_YUV420P16;
87  } else if (strncmp("422p16", tokstart, 6) == 0) {
88  pix_fmt = AV_PIX_FMT_YUV422P16;
89  } else if (strncmp("444p16", tokstart, 6) == 0) {
90  pix_fmt = AV_PIX_FMT_YUV444P16;
91  } else if (strncmp("420p14", tokstart, 6) == 0) {
92  pix_fmt = AV_PIX_FMT_YUV420P14;
93  } else if (strncmp("422p14", tokstart, 6) == 0) {
94  pix_fmt = AV_PIX_FMT_YUV422P14;
95  } else if (strncmp("444p14", tokstart, 6) == 0) {
96  pix_fmt = AV_PIX_FMT_YUV444P14;
97  } else if (strncmp("420p12", tokstart, 6) == 0) {
98  pix_fmt = AV_PIX_FMT_YUV420P12;
99  } else if (strncmp("422p12", tokstart, 6) == 0) {
100  pix_fmt = AV_PIX_FMT_YUV422P12;
101  } else if (strncmp("444p12", tokstart, 6) == 0) {
102  pix_fmt = AV_PIX_FMT_YUV444P12;
103  } else if (strncmp("420p10", tokstart, 6) == 0) {
104  pix_fmt = AV_PIX_FMT_YUV420P10;
105  } else if (strncmp("422p10", tokstart, 6) == 0) {
106  pix_fmt = AV_PIX_FMT_YUV422P10;
107  } else if (strncmp("444p10", tokstart, 6) == 0) {
108  pix_fmt = AV_PIX_FMT_YUV444P10;
109  } else if (strncmp("420p9", tokstart, 5) == 0) {
110  pix_fmt = AV_PIX_FMT_YUV420P9;
111  } else if (strncmp("422p9", tokstart, 5) == 0) {
112  pix_fmt = AV_PIX_FMT_YUV422P9;
113  } else if (strncmp("444p9", tokstart, 5) == 0) {
114  pix_fmt = AV_PIX_FMT_YUV444P9;
115  } else if (strncmp("420", tokstart, 3) == 0) {
116  pix_fmt = AV_PIX_FMT_YUV420P;
117  chroma_sample_location = AVCHROMA_LOC_CENTER;
118  } else if (strncmp("411", tokstart, 3) == 0) {
119  pix_fmt = AV_PIX_FMT_YUV411P;
120  } else if (strncmp("422", tokstart, 3) == 0) {
121  pix_fmt = AV_PIX_FMT_YUV422P;
122  } else if (strncmp("444alpha", tokstart, 8) == 0 ) {
123  av_log(s, AV_LOG_ERROR, "Cannot handle 4:4:4:4 "
124  "YUV4MPEG stream.\n");
125  return -1;
126  } else if (strncmp("444", tokstart, 3) == 0) {
127  pix_fmt = AV_PIX_FMT_YUV444P;
128  } else if (strncmp("mono16", tokstart, 6) == 0) {
129  pix_fmt = AV_PIX_FMT_GRAY16;
130  } else if (strncmp("mono12", tokstart, 6) == 0) {
131  pix_fmt = AV_PIX_FMT_GRAY12;
132  } else if (strncmp("mono10", tokstart, 6) == 0) {
133  pix_fmt = AV_PIX_FMT_GRAY10;
134  } else if (strncmp("mono9", tokstart, 5) == 0) {
135  pix_fmt = AV_PIX_FMT_GRAY9;
136  } else if (strncmp("mono", tokstart, 4) == 0) {
137  pix_fmt = AV_PIX_FMT_GRAY8;
138  } else {
139  av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains an unknown "
140  "pixel format.\n");
141  return -1;
142  }
143  while (tokstart < header_end && *tokstart != 0x20)
144  tokstart++;
145  break;
146  case 'I': // Interlace type
147  switch (*tokstart++){
148  case '?':
149  field_order = AV_FIELD_UNKNOWN;
150  break;
151  case 'p':
152  field_order = AV_FIELD_PROGRESSIVE;
153  break;
154  case 't':
155  field_order = AV_FIELD_TT;
156  break;
157  case 'b':
158  field_order = AV_FIELD_BB;
159  break;
160  case 'm':
161  av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains mixed "
162  "interlaced and non-interlaced frames.\n");
163  default:
164  av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
165  return AVERROR(EINVAL);
166  }
167  break;
168  case 'F': // Frame rate
169  sscanf(tokstart, "%d:%d", &raten, &rated); // 0:0 if unknown
170  while (tokstart < header_end && *tokstart != 0x20)
171  tokstart++;
172  break;
173  case 'A': // Pixel aspect
174  sscanf(tokstart, "%d:%d", &aspectn, &aspectd); // 0:0 if unknown
175  while (tokstart < header_end && *tokstart != 0x20)
176  tokstart++;
177  break;
178  case 'X': // Vendor extensions
179  if (strncmp("YSCSS=", tokstart, 6) == 0) {
180  // Older nonstandard pixel format representation
181  tokstart += 6;
182  if (strncmp("420JPEG", tokstart, 7) == 0)
183  alt_pix_fmt = AV_PIX_FMT_YUV420P;
184  else if (strncmp("420MPEG2", tokstart, 8) == 0)
185  alt_pix_fmt = AV_PIX_FMT_YUV420P;
186  else if (strncmp("420PALDV", tokstart, 8) == 0)
187  alt_pix_fmt = AV_PIX_FMT_YUV420P;
188  else if (strncmp("420P9", tokstart, 5) == 0)
189  alt_pix_fmt = AV_PIX_FMT_YUV420P9;
190  else if (strncmp("422P9", tokstart, 5) == 0)
191  alt_pix_fmt = AV_PIX_FMT_YUV422P9;
192  else if (strncmp("444P9", tokstart, 5) == 0)
193  alt_pix_fmt = AV_PIX_FMT_YUV444P9;
194  else if (strncmp("420P10", tokstart, 6) == 0)
195  alt_pix_fmt = AV_PIX_FMT_YUV420P10;
196  else if (strncmp("422P10", tokstart, 6) == 0)
197  alt_pix_fmt = AV_PIX_FMT_YUV422P10;
198  else if (strncmp("444P10", tokstart, 6) == 0)
199  alt_pix_fmt = AV_PIX_FMT_YUV444P10;
200  else if (strncmp("420P12", tokstart, 6) == 0)
201  alt_pix_fmt = AV_PIX_FMT_YUV420P12;
202  else if (strncmp("422P12", tokstart, 6) == 0)
203  alt_pix_fmt = AV_PIX_FMT_YUV422P12;
204  else if (strncmp("444P12", tokstart, 6) == 0)
205  alt_pix_fmt = AV_PIX_FMT_YUV444P12;
206  else if (strncmp("420P14", tokstart, 6) == 0)
207  alt_pix_fmt = AV_PIX_FMT_YUV420P14;
208  else if (strncmp("422P14", tokstart, 6) == 0)
209  alt_pix_fmt = AV_PIX_FMT_YUV422P14;
210  else if (strncmp("444P14", tokstart, 6) == 0)
211  alt_pix_fmt = AV_PIX_FMT_YUV444P14;
212  else if (strncmp("420P16", tokstart, 6) == 0)
213  alt_pix_fmt = AV_PIX_FMT_YUV420P16;
214  else if (strncmp("422P16", tokstart, 6) == 0)
215  alt_pix_fmt = AV_PIX_FMT_YUV422P16;
216  else if (strncmp("444P16", tokstart, 6) == 0)
217  alt_pix_fmt = AV_PIX_FMT_YUV444P16;
218  else if (strncmp("411", tokstart, 3) == 0)
219  alt_pix_fmt = AV_PIX_FMT_YUV411P;
220  else if (strncmp("422", tokstart, 3) == 0)
221  alt_pix_fmt = AV_PIX_FMT_YUV422P;
222  else if (strncmp("444", tokstart, 3) == 0)
223  alt_pix_fmt = AV_PIX_FMT_YUV444P;
224  } else if (strncmp("COLORRANGE=", tokstart, 11) == 0) {
225  tokstart += 11;
226  if (strncmp("FULL",tokstart, 4) == 0)
227  color_range = AVCOL_RANGE_JPEG;
228  else if (strncmp("LIMITED", tokstart, 7) == 0)
229  color_range = AVCOL_RANGE_MPEG;
230  }
231  while (tokstart < header_end && *tokstart != 0x20)
232  tokstart++;
233  break;
234  }
235  }
236 
237  if (width == -1 || height == -1) {
238  av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
239  return -1;
240  }
241 
242  if (pix_fmt == AV_PIX_FMT_NONE) {
243  if (alt_pix_fmt == AV_PIX_FMT_NONE)
244  pix_fmt = AV_PIX_FMT_YUV420P;
245  else
246  pix_fmt = alt_pix_fmt;
247  }
248 
249  if (raten <= 0 || rated <= 0) {
250  // Frame rate unknown
251  raten = 25;
252  rated = 1;
253  }
254 
255  if (aspectn == 0 && aspectd == 0) {
256  // Pixel aspect unknown
257  aspectd = 1;
258  }
259 
260  st = avformat_new_stream(s, NULL);
261  if (!st)
262  return AVERROR(ENOMEM);
263  st->codecpar->width = width;
264  st->codecpar->height = height;
265  av_reduce(&raten, &rated, raten, rated, (1UL << 31) - 1);
266  avpriv_set_pts_info(st, 64, rated, raten);
267  st->avg_frame_rate = av_inv_q(st->time_base);
268  st->codecpar->format = pix_fmt;
271  st->sample_aspect_ratio = (AVRational){ aspectn, aspectd };
272  st->codecpar->chroma_location = chroma_sample_location;
274  st->codecpar->field_order = field_order;
276  if ((int) s->packet_size < 0)
277  return s->packet_size;
278  s->internal->data_offset = avio_tell(pb);
279 
280  st->duration = (avio_size(pb) - avio_tell(pb)) / s->packet_size;
281 
282  return 0;
283 }
284 
286 {
287  int i;
288  char header[MAX_FRAME_HEADER+1];
289  int ret;
290  int64_t off = avio_tell(s->pb);
291 
292  for (i = 0; i < MAX_FRAME_HEADER; i++) {
293  header[i] = avio_r8(s->pb);
294  if (header[i] == '\n') {
295  header[i + 1] = 0;
296  break;
297  }
298  }
299  if (s->pb->error)
300  return s->pb->error;
301  else if (s->pb->eof_reached)
302  return AVERROR_EOF;
303  else if (i == MAX_FRAME_HEADER)
304  return AVERROR_INVALIDDATA;
305 
306  if (strncmp(header, Y4M_FRAME_MAGIC, strlen(Y4M_FRAME_MAGIC)))
307  return AVERROR_INVALIDDATA;
308 
309  ret = av_get_packet(s->pb, pkt, s->packet_size - Y4M_FRAME_MAGIC_LEN);
310  if (ret < 0)
311  return ret;
312  else if (ret != s->packet_size - Y4M_FRAME_MAGIC_LEN) {
313  av_packet_unref(pkt);
314  return s->pb->eof_reached ? AVERROR_EOF : AVERROR(EIO);
315  }
316  pkt->stream_index = 0;
317  pkt->pts = (off - s->internal->data_offset) / s->packet_size;
318  pkt->duration = 1;
319  return 0;
320 }
321 
322 static int yuv4_read_seek(AVFormatContext *s, int stream_index,
323  int64_t pts, int flags)
324 {
325  int64_t pos;
326 
327  if (flags & AVSEEK_FLAG_BACKWARD)
328  pts = FFMAX(0, pts - 1);
329  pos = pts * s->packet_size;
330 
331  if (avio_seek(s->pb, pos + s->internal->data_offset, SEEK_SET) < 0)
332  return -1;
333  return 0;
334 }
335 
336 static int yuv4_probe(AVProbeData *pd)
337 {
338  /* check file header */
339  if (strncmp(pd->buf, Y4M_MAGIC, sizeof(Y4M_MAGIC) - 1) == 0)
340  return AVPROBE_SCORE_MAX;
341  else
342  return 0;
343 }
344 
346  .name = "yuv4mpegpipe",
347  .long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
348  .read_probe = yuv4_probe,
349  .read_header = yuv4_read_header,
350  .read_packet = yuv4_read_packet,
351  .read_seek = yuv4_read_seek,
352  .extensions = "y4m",
353 };
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2504
enum AVChromaLocation chroma_location
Definition: avcodec.h:3990
unsigned int packet_size
Definition: avformat.h:1475
#define NULL
Definition: coverity.c:32
enum AVFieldOrder field_order
Video only.
Definition: avcodec.h:3981
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static enum AVPixelFormat pix_fmt
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:336
MPEG-2/4 4:2:0, H.264 default for 4:2:0.
Definition: pixfmt.h:533
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:389
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
misc image utilities
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4882
int64_t data_offset
offset of the first packet
Definition: internal.h:82
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3900
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:936
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1804
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:359
color_range
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:383
static AVPacket pkt
#define AV_PIX_FMT_GRAY10
Definition: pixfmt.h:360
Format I/O context.
Definition: avformat.h:1351
#define AV_PIX_FMT_GRAY12
Definition: pixfmt.h:361
int width
Video only.
Definition: avcodec.h:3966
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1463
#define Y4M_FRAME_MAGIC
Definition: yuv4mpeg.h:25
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4455
#define height
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:392
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:310
AVColorRange
MPEG vs JPEG YUV range.
Definition: pixfmt.h:509
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
static const uint8_t header[24]
Definition: sdr2.c:67
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:384
#define av_log(a,...)
#define Y4M_MAGIC
Definition: yuv4mpeg.h:24
int av_image_get_buffer_size(enum AVPixelFormat pix_fmt, int width, int height, int align)
Return the size in bytes of the amount of data required to store an image with the given parameters...
Definition: imgutils.c:431
static int yuv4_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: yuv4mpegdec.c:285
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3896
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:382
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:947
#define FFMAX(a, b)
Definition: common.h:94
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:639
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:450
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:377
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:363
#define width
ITU-R 601, SMPTE 274M 296M S314M(DV 4:1:1), mpeg2 4:2:2.
Definition: pixfmt.h:535
#define s(width, name)
Definition: cbs_vp9.c:257
static int yuv4_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
Definition: yuv4mpegdec.c:322
enum AVColorRange color_range
Video only.
Definition: avcodec.h:3986
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:378
the normal 2^n-1 "JPEG" YUV ranges
Definition: pixfmt.h:512
Stream structure.
Definition: avformat.h:874
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:390
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:387
static int yuv4_read_header(AVFormatContext *s)
Definition: yuv4mpegdec.c:32
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:598
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:379
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AVFieldOrder
Definition: avcodec.h:1511
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:376
int error
contains the error code or 0 if no error happened
Definition: avio.h:245
This structure contains the data a format has to probe a file.
Definition: avformat.h:448
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:388
static int64_t pts
#define flags(name, subs,...)
Definition: cbs_av1.c:596
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:380
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:386
the normal 219*2^(n-8) "MPEG" YUV ranges
Definition: pixfmt.h:511
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:923
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:460
Main libavformat public API header.
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
Y , 8bpp.
Definition: pixfmt.h:74
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
int eof_reached
true if eof reached
Definition: avio.h:239
AVInputFormat ff_yuv4mpegpipe_demuxer
Definition: yuv4mpegdec.c:345
static int yuv4_probe(AVProbeData *pd)
Definition: yuv4mpegdec.c:336
#define Y4M_FRAME_MAGIC_LEN
Definition: yuv4mpeg.h:26
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:647
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:531
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:534
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1021
int stream_index
Definition: avcodec.h:1447
#define MAX_YUV4_HEADER
Definition: yuv4mpegdec.c:29
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:903
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
This structure stores compressed data.
Definition: avcodec.h:1422
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:391
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1438
#define MAX_FRAME_HEADER
Definition: yuv4mpegdec.c:30