FFmpeg
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/avstring.h"
23 #include "libavutil/imgutils.h"
24 
25 #include "avformat.h"
26 #include "internal.h"
27 #include "yuv4mpeg.h"
28 
29 /* Header size increased to allow room for optional flags */
30 #define MAX_YUV4_HEADER 96
31 #define MAX_FRAME_HEADER 80
32 
34 {
35  char header[MAX_YUV4_HEADER + 10]; // Include headroom for
36  // the longest option
37  char *tokstart, *tokend, *header_end;
38  int i;
39  AVIOContext *pb = s->pb;
40  int width = -1, height = -1, raten = 0,
41  rated = 0, aspectn = 0, aspectd = 0;
43  enum AVChromaLocation chroma_sample_location = AVCHROMA_LOC_UNSPECIFIED;
44  enum AVFieldOrder field_order = AV_FIELD_UNKNOWN;
46  AVStream *st;
47 
48  for (i = 0; i < MAX_YUV4_HEADER; i++) {
49  header[i] = avio_r8(pb);
50  if (header[i] == '\n') {
51  header[i + 1] = 0x20; // Add a space after last option.
52  // Makes parsing "444" vs "444alpha" easier.
53  header[i + 2] = 0;
54  break;
55  }
56  }
57  if (i == MAX_YUV4_HEADER) {
58  av_log(s, AV_LOG_ERROR, "Header too large.\n");
59  return AVERROR(EINVAL);
60  }
61  if (strncmp(header, Y4M_MAGIC, strlen(Y4M_MAGIC))) {
62  av_log(s, AV_LOG_ERROR, "Invalid magic number for yuv4mpeg.\n");
63  return AVERROR(EINVAL);
64  }
65 
66  header_end = &header[i + 1]; // Include space
67  for (tokstart = &header[strlen(Y4M_MAGIC) + 1];
68  tokstart < header_end; tokstart++) {
69  if (*tokstart == 0x20)
70  continue;
71  switch (*tokstart++) {
72  case 'W': // Width. Required.
73  width = strtol(tokstart, &tokend, 10);
74  tokstart = tokend;
75  break;
76  case 'H': // Height. Required.
77  height = strtol(tokstart, &tokend, 10);
78  tokstart = tokend;
79  break;
80  case 'C': // Color space
81  {
82  static const struct {
83 #define MAX_PIX_FMT_LENGTH 8
84  char name[MAX_PIX_FMT_LENGTH + 1];
85 #undef MAX_PIX_FMT_LENGTH
87  enum AVChromaLocation chroma_loc;
88  } pix_fmt_array[] = {
90  { "420mpeg2", AV_PIX_FMT_YUV420P, AVCHROMA_LOC_LEFT },
117  };
118  for (i = 0; i < FF_ARRAY_ELEMS(pix_fmt_array); i++) {
119  if (av_strstart(tokstart, pix_fmt_array[i].name, NULL)) {
120  pix_fmt = pix_fmt_array[i].pix_fmt;
121  if (pix_fmt_array[i].chroma_loc != AVCHROMA_LOC_UNSPECIFIED)
122  chroma_sample_location = pix_fmt_array[i].chroma_loc;
123  break;
124  }
125  }
126  if (i == FF_ARRAY_ELEMS(pix_fmt_array)) {
127  av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains an unknown "
128  "pixel format.\n");
129  return AVERROR_INVALIDDATA;
130  }
131  while (tokstart < header_end && *tokstart != 0x20)
132  tokstart++;
133  break;
134  }
135  case 'I': // Interlace type
136  switch (*tokstart++){
137  case '?':
138  field_order = AV_FIELD_UNKNOWN;
139  break;
140  case 'p':
141  field_order = AV_FIELD_PROGRESSIVE;
142  break;
143  case 't':
144  field_order = AV_FIELD_TT;
145  break;
146  case 'b':
147  field_order = AV_FIELD_BB;
148  break;
149  case 'm':
150  av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains mixed "
151  "interlaced and non-interlaced frames.\n");
152  default:
153  av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
154  return AVERROR(EINVAL);
155  }
156  break;
157  case 'F': // Frame rate
158  sscanf(tokstart, "%d:%d", &raten, &rated); // 0:0 if unknown
159  while (tokstart < header_end && *tokstart != 0x20)
160  tokstart++;
161  break;
162  case 'A': // Pixel aspect
163  sscanf(tokstart, "%d:%d", &aspectn, &aspectd); // 0:0 if unknown
164  while (tokstart < header_end && *tokstart != 0x20)
165  tokstart++;
166  break;
167  case 'X': // Vendor extensions
168  if (strncmp("YSCSS=", tokstart, 6) == 0) {
169  static const struct {
170 #define MAX_PIX_FMT_LENGTH 8
171  char name[MAX_PIX_FMT_LENGTH + 1];
172 #undef MAX_PIX_FMT_LENGTH
173  enum AVPixelFormat pix_fmt;
174  } pix_fmt_array[] = {
175  { "420JPEG", AV_PIX_FMT_YUV420P },
176  { "420MPEG2", AV_PIX_FMT_YUV420P },
177  { "420PALDV", AV_PIX_FMT_YUV420P },
178  { "420P9", AV_PIX_FMT_YUV420P9 },
179  { "422P9", AV_PIX_FMT_YUV422P9 },
180  { "444P9", AV_PIX_FMT_YUV444P9 },
181  { "420P10", AV_PIX_FMT_YUV420P10 },
182  { "444P10", AV_PIX_FMT_YUV444P10 },
183  { "420P12", AV_PIX_FMT_YUV420P12 },
184  { "422P12", AV_PIX_FMT_YUV422P12 },
185  { "444P12", AV_PIX_FMT_YUV444P12 },
186  { "420P14", AV_PIX_FMT_YUV420P14 },
187  { "422P14", AV_PIX_FMT_YUV422P14 },
188  { "444P14", AV_PIX_FMT_YUV444P14 },
189  { "420P16", AV_PIX_FMT_YUV420P16 },
190  { "422P16", AV_PIX_FMT_YUV422P16 },
191  { "444P16", AV_PIX_FMT_YUV444P16 },
192  { "411", AV_PIX_FMT_YUV411P },
193  { "422", AV_PIX_FMT_YUV422P },
194  { "444", AV_PIX_FMT_YUV444P },
195  };
196  // Older nonstandard pixel format representation
197  tokstart += 6;
198  for (size_t i = 0; i < FF_ARRAY_ELEMS(pix_fmt_array); i++)
199  if (av_strstart(tokstart, pix_fmt_array[i].name, NULL)) {
200  alt_pix_fmt = pix_fmt_array[i].pix_fmt;
201  break;
202  }
203  } else if (strncmp("COLORRANGE=", tokstart, 11) == 0) {
204  tokstart += 11;
205  if (strncmp("FULL",tokstart, 4) == 0)
207  else if (strncmp("LIMITED", tokstart, 7) == 0)
209  }
210  while (tokstart < header_end && *tokstart != 0x20)
211  tokstart++;
212  break;
213  }
214  }
215 
216  if (width == -1 || height == -1) {
217  av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
218  return AVERROR_INVALIDDATA;
219  }
220 
221  if (pix_fmt == AV_PIX_FMT_NONE) {
222  if (alt_pix_fmt == AV_PIX_FMT_NONE)
224  else
225  pix_fmt = alt_pix_fmt;
226  }
227 
228  if (raten <= 0 || rated <= 0) {
229  // Frame rate unknown
230  raten = 25;
231  rated = 1;
232  }
233 
234  if (aspectn == 0 && aspectd == 0) {
235  // Pixel aspect unknown
236  aspectd = 1;
237  }
238 
239  st = avformat_new_stream(s, NULL);
240  if (!st)
241  return AVERROR(ENOMEM);
242  st->codecpar->width = width;
243  st->codecpar->height = height;
244  av_reduce(&raten, &rated, raten, rated, (1UL << 31) - 1);
245  avpriv_set_pts_info(st, 64, rated, raten);
246  st->avg_frame_rate = av_inv_q(st->time_base);
247  st->codecpar->format = pix_fmt;
250  st->sample_aspect_ratio = (AVRational){ aspectn, aspectd };
251  st->codecpar->chroma_location = chroma_sample_location;
253  st->codecpar->field_order = field_order;
255  if ((int) s->packet_size < 0)
256  return s->packet_size;
257  s->internal->data_offset = avio_tell(pb);
258 
259  st->duration = (avio_size(pb) - avio_tell(pb)) / s->packet_size;
260 
261  return 0;
262 }
263 
265 {
266  int i;
267  char header[MAX_FRAME_HEADER+1];
268  int ret;
269  int64_t off = avio_tell(s->pb);
270 
271  for (i = 0; i < MAX_FRAME_HEADER; i++) {
272  header[i] = avio_r8(s->pb);
273  if (header[i] == '\n') {
274  header[i + 1] = 0;
275  break;
276  }
277  }
278  if (s->pb->error)
279  return s->pb->error;
280  else if (s->pb->eof_reached)
281  return AVERROR_EOF;
282  else if (i == MAX_FRAME_HEADER)
283  return AVERROR_INVALIDDATA;
284 
285  if (strncmp(header, Y4M_FRAME_MAGIC, strlen(Y4M_FRAME_MAGIC)))
286  return AVERROR_INVALIDDATA;
287 
288  ret = av_get_packet(s->pb, pkt, s->packet_size - Y4M_FRAME_MAGIC_LEN);
289  if (ret < 0)
290  return ret;
291  else if (ret != s->packet_size - Y4M_FRAME_MAGIC_LEN) {
292  return s->pb->eof_reached ? AVERROR_EOF : AVERROR(EIO);
293  }
294  pkt->stream_index = 0;
295  pkt->pts = (off - s->internal->data_offset) / s->packet_size;
296  pkt->duration = 1;
297  return 0;
298 }
299 
300 static int yuv4_read_seek(AVFormatContext *s, int stream_index,
301  int64_t pts, int flags)
302 {
303  int64_t pos;
304 
306  pts = FFMAX(0, pts - 1);
307  if (pts < 0)
308  return -1;
309  pos = pts * s->packet_size;
310 
311  if (avio_seek(s->pb, pos + s->internal->data_offset, SEEK_SET) < 0)
312  return -1;
313  return 0;
314 }
315 
316 static int yuv4_probe(const AVProbeData *pd)
317 {
318  /* check file header */
319  if (strncmp(pd->buf, Y4M_MAGIC, sizeof(Y4M_MAGIC) - 1) == 0)
320  return AVPROBE_SCORE_MAX;
321  else
322  return 0;
323 }
324 
326  .name = "yuv4mpegpipe",
327  .long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
328  .read_probe = yuv4_probe,
329  .read_header = yuv4_read_header,
330  .read_packet = yuv4_read_packet,
331  .read_seek = yuv4_read_seek,
332  .extensions = "y4m",
333 };
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
name
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option name
Definition: writing_filters.txt:88
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
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4375
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
AV_CODEC_ID_RAWVIDEO
@ AV_CODEC_ID_RAWVIDEO
Definition: codec_id.h:63
AVCOL_RANGE_JPEG
@ AVCOL_RANGE_JPEG
Full range content.
Definition: pixfmt.h:576
Y4M_FRAME_MAGIC_LEN
#define Y4M_FRAME_MAGIC_LEN
Definition: yuv4mpeg.h:26
AVStream::avg_frame_rate
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:914
Y4M_MAGIC
#define Y4M_MAGIC
Definition: yuv4mpeg.h:24
AV_PIX_FMT_YUV420P10
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:389
MAX_FRAME_HEADER
#define MAX_FRAME_HEADER
Definition: yuv4mpegdec.c:31
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:391
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
avio_size
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:332
AV_PIX_FMT_GRAY9
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:369
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:458
AV_FIELD_TT
@ AV_FIELD_TT
Definition: codec_par.h:39
AV_PIX_FMT_YUV422P9
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:387
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:538
pts
static int64_t pts
Definition: transcode_aac.c:653
AV_PIX_FMT_GRAY16
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:373
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:890
av_reduce
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
Y4M_FRAME_MAGIC
#define Y4M_FRAME_MAGIC
Definition: yuv4mpeg.h:25
ff_yuv4mpegpipe_demuxer
const AVInputFormat ff_yuv4mpegpipe_demuxer
Definition: yuv4mpegdec.c:325
AV_PIX_FMT_YUV444P10
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:392
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
AVInputFormat
Definition: avformat.h:626
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
AV_PIX_FMT_YUV422P16
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:401
width
#define width
s
#define s(width, name)
Definition: cbs_vp9.c:257
yuv4_probe
static int yuv4_probe(const AVProbeData *pd)
Definition: yuv4mpegdec.c:316
AV_PIX_FMT_YUV444P16
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:402
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:631
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:448
AVCodecParameters::width
int width
Video only.
Definition: codec_par.h:126
AV_FIELD_UNKNOWN
@ AV_FIELD_UNKNOWN
Definition: codec_par.h:37
AV_PIX_FMT_YUV420P9
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:386
AV_PIX_FMT_YUV420P16
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:400
pix_fmt
static enum AVPixelFormat pix_fmt
Definition: demuxing_decoding.c:41
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
color_range
color_range
Definition: vf_selectivecolor.c:44
AV_PIX_FMT_GRAY10
#define AV_PIX_FMT_GRAY10
Definition: pixfmt.h:370
AVFormatContext
Format I/O context.
Definition: avformat.h:1107
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:994
AVSEEK_FLAG_BACKWARD
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2167
AVStream::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:870
NULL
#define NULL
Definition: coverity.c:32
AVCHROMA_LOC_LEFT
@ AVCHROMA_LOC_LEFT
MPEG-2/4 4:2:0, H.264 default for 4:2:0.
Definition: pixfmt.h:597
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AVCHROMA_LOC_TOPLEFT
@ AVCHROMA_LOC_TOPLEFT
ITU-R 601, SMPTE 274M 296M S314M(DV 4:1:1), mpeg2 4:2:2.
Definition: pixfmt.h:599
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:446
AV_PIX_FMT_YUV422P10
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:390
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
AVCOL_RANGE_UNSPECIFIED
@ AVCOL_RANGE_UNSPECIFIED
Definition: pixfmt.h:542
yuv4_read_packet
static int yuv4_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: yuv4mpegdec.c:264
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
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:116
avpriv_set_pts_info
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:4800
AV_PIX_FMT_YUV422P12
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:394
AV_PIX_FMT_YUV444P12
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:396
AVCHROMA_LOC_UNSPECIFIED
@ AVCHROMA_LOC_UNSPECIFIED
Definition: pixfmt.h:596
AVStream::sample_aspect_ratio
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:903
header
static const uint8_t header[24]
Definition: sdr2.c:67
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:607
height
#define height
av_image_get_buffer_size
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:466
AV_PIX_FMT_YUVA444P
@ AV_PIX_FMT_YUVA444P
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:167
av_strstart
int av_strstart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str.
Definition: avstring.c:34
AVChromaLocation
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:595
AV_FIELD_BB
@ AV_FIELD_BB
Definition: codec_par.h:40
i
int i
Definition: input.c:406
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:366
AVCodecParameters::height
int height
Definition: codec_par.h:127
av_inv_q
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
AVCodecParameters::color_range
enum AVColorRange color_range
Video only.
Definition: codec_par.h:146
yuv4mpeg.h
AVCOL_RANGE_MPEG
@ AVCOL_RANGE_MPEG
Narrow or limited range content.
Definition: pixfmt.h:559
AV_PIX_FMT_YUV444P9
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:388
AVCodecParameters::field_order
enum AVFieldOrder field_order
Video only.
Definition: codec_par.h:141
av_get_packet
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:282
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:847
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:243
pos
unsigned int pos
Definition: spdifenc.c:412
avformat.h
AV_PIX_FMT_YUV420P12
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:393
AVCodecParameters::chroma_location
enum AVChromaLocation chroma_location
Definition: codec_par.h:150
AV_PIX_FMT_YUV422P14
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:398
AVCHROMA_LOC_CENTER
@ AVCHROMA_LOC_CENTER
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:598
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
yuv4_read_header
static int yuv4_read_header(AVFormatContext *s)
Definition: yuv4mpegdec.c:33
AVPacket::stream_index
int stream_index
Definition: packet.h:375
AV_PIX_FMT_YUV444P
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
MAX_YUV4_HEADER
#define MAX_YUV4_HEADER
Definition: yuv4mpegdec.c:30
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_PIX_FMT_YUV422P
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
AV_FIELD_PROGRESSIVE
@ AV_FIELD_PROGRESSIVE
Definition: codec_par.h:38
AVCodecParameters::format
int format
Definition: codec_par.h:84
yuv4_read_seek
static int yuv4_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
Definition: yuv4mpegdec.c:300
AVFieldOrder
AVFieldOrder
Definition: codec_par.h:36
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVPacket
This structure stores compressed data.
Definition: packet.h:350
AV_PIX_FMT_YUV411P
@ AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
imgutils.h
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
MAX_PIX_FMT_LENGTH
#define MAX_PIX_FMT_LENGTH
AV_PIX_FMT_YUV444P14
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:399
avstring.h
AV_PIX_FMT_GRAY12
#define AV_PIX_FMT_GRAY12
Definition: pixfmt.h:371
AVColorRange
AVColorRange
Visual content value range.
Definition: pixfmt.h:541
AV_PIX_FMT_YUV420P14
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:397