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  int64_t data_offset;
48 
49  for (i = 0; i < MAX_YUV4_HEADER; i++) {
50  header[i] = avio_r8(pb);
51  if (header[i] == '\n') {
52  header[i + 1] = 0x20; // Add a space after last option.
53  // Makes parsing "444" vs "444alpha" easier.
54  header[i + 2] = 0;
55  break;
56  }
57  }
58  if (i == MAX_YUV4_HEADER) {
59  av_log(s, AV_LOG_ERROR, "Header too large.\n");
60  return AVERROR(EINVAL);
61  }
62  if (strncmp(header, Y4M_MAGIC, strlen(Y4M_MAGIC))) {
63  av_log(s, AV_LOG_ERROR, "Invalid magic number for yuv4mpeg.\n");
64  return AVERROR(EINVAL);
65  }
66 
67  header_end = &header[i + 1]; // Include space
68  for (tokstart = &header[strlen(Y4M_MAGIC) + 1];
69  tokstart < header_end; tokstart++) {
70  if (*tokstart == 0x20)
71  continue;
72  switch (*tokstart++) {
73  case 'W': // Width. Required.
74  width = strtol(tokstart, &tokend, 10);
75  tokstart = tokend;
76  break;
77  case 'H': // Height. Required.
78  height = strtol(tokstart, &tokend, 10);
79  tokstart = tokend;
80  break;
81  case 'C': // Color space
82  {
83  static const struct {
84 #define MAX_PIX_FMT_LENGTH 8
85  char name[MAX_PIX_FMT_LENGTH + 1];
86 #undef MAX_PIX_FMT_LENGTH
88  enum AVChromaLocation chroma_loc;
89  } pix_fmt_array[] = {
91  { "420mpeg2", AV_PIX_FMT_YUV420P, AVCHROMA_LOC_LEFT },
118  };
119  for (i = 0; i < FF_ARRAY_ELEMS(pix_fmt_array); i++) {
120  if (av_strstart(tokstart, pix_fmt_array[i].name, NULL)) {
121  pix_fmt = pix_fmt_array[i].pix_fmt;
122  if (pix_fmt_array[i].chroma_loc != AVCHROMA_LOC_UNSPECIFIED)
123  chroma_sample_location = pix_fmt_array[i].chroma_loc;
124  break;
125  }
126  }
127  if (i == FF_ARRAY_ELEMS(pix_fmt_array)) {
128  av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains an unknown "
129  "pixel format.\n");
130  return AVERROR_INVALIDDATA;
131  }
132  while (tokstart < header_end && *tokstart != 0x20)
133  tokstart++;
134  break;
135  }
136  case 'I': // Interlace type
137  switch (*tokstart++){
138  case '?':
139  field_order = AV_FIELD_UNKNOWN;
140  break;
141  case 'p':
142  field_order = AV_FIELD_PROGRESSIVE;
143  break;
144  case 't':
145  field_order = AV_FIELD_TT;
146  break;
147  case 'b':
148  field_order = AV_FIELD_BB;
149  break;
150  case 'm':
151  av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains mixed "
152  "interlaced and non-interlaced frames.\n");
153  default:
154  av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
155  return AVERROR(EINVAL);
156  }
157  break;
158  case 'F': // Frame rate
159  sscanf(tokstart, "%d:%d", &raten, &rated); // 0:0 if unknown
160  while (tokstart < header_end && *tokstart != 0x20)
161  tokstart++;
162  break;
163  case 'A': // Pixel aspect
164  sscanf(tokstart, "%d:%d", &aspectn, &aspectd); // 0:0 if unknown
165  while (tokstart < header_end && *tokstart != 0x20)
166  tokstart++;
167  break;
168  case 'X': // Vendor extensions
169  if (strncmp("YSCSS=", tokstart, 6) == 0) {
170  static const struct {
171 #define MAX_PIX_FMT_LENGTH 8
172  char name[MAX_PIX_FMT_LENGTH + 1];
173 #undef MAX_PIX_FMT_LENGTH
174  enum AVPixelFormat pix_fmt;
175  } pix_fmt_array[] = {
176  { "420JPEG", AV_PIX_FMT_YUV420P },
177  { "420MPEG2", AV_PIX_FMT_YUV420P },
178  { "420PALDV", AV_PIX_FMT_YUV420P },
179  { "420P9", AV_PIX_FMT_YUV420P9 },
180  { "422P9", AV_PIX_FMT_YUV422P9 },
181  { "444P9", AV_PIX_FMT_YUV444P9 },
182  { "420P10", AV_PIX_FMT_YUV420P10 },
183  { "444P10", AV_PIX_FMT_YUV444P10 },
184  { "420P12", AV_PIX_FMT_YUV420P12 },
185  { "422P12", AV_PIX_FMT_YUV422P12 },
186  { "444P12", AV_PIX_FMT_YUV444P12 },
187  { "420P14", AV_PIX_FMT_YUV420P14 },
188  { "422P14", AV_PIX_FMT_YUV422P14 },
189  { "444P14", AV_PIX_FMT_YUV444P14 },
190  { "420P16", AV_PIX_FMT_YUV420P16 },
191  { "422P16", AV_PIX_FMT_YUV422P16 },
192  { "444P16", AV_PIX_FMT_YUV444P16 },
193  { "411", AV_PIX_FMT_YUV411P },
194  { "422", AV_PIX_FMT_YUV422P },
195  { "444", AV_PIX_FMT_YUV444P },
196  };
197  // Older nonstandard pixel format representation
198  tokstart += 6;
199  for (size_t i = 0; i < FF_ARRAY_ELEMS(pix_fmt_array); i++)
200  if (av_strstart(tokstart, pix_fmt_array[i].name, NULL)) {
201  alt_pix_fmt = pix_fmt_array[i].pix_fmt;
202  break;
203  }
204  } else if (strncmp("COLORRANGE=", tokstart, 11) == 0) {
205  tokstart += 11;
206  if (strncmp("FULL",tokstart, 4) == 0)
208  else if (strncmp("LIMITED", tokstart, 7) == 0)
210  }
211  while (tokstart < header_end && *tokstart != 0x20)
212  tokstart++;
213  break;
214  }
215  }
216 
217  if (width == -1 || height == -1) {
218  av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
219  return AVERROR_INVALIDDATA;
220  }
221 
222  if (pix_fmt == AV_PIX_FMT_NONE) {
223  if (alt_pix_fmt == AV_PIX_FMT_NONE)
225  else
226  pix_fmt = alt_pix_fmt;
227  }
228 
229  if (raten <= 0 || rated <= 0) {
230  // Frame rate unknown
231  raten = 25;
232  rated = 1;
233  }
234 
235  if (aspectn == 0 && aspectd == 0) {
236  // Pixel aspect unknown
237  aspectd = 1;
238  }
239 
240  st = avformat_new_stream(s, NULL);
241  if (!st)
242  return AVERROR(ENOMEM);
243  st->codecpar->width = width;
244  st->codecpar->height = height;
245  av_reduce(&raten, &rated, raten, rated, (1UL << 31) - 1);
246  avpriv_set_pts_info(st, 64, rated, raten);
247  st->avg_frame_rate = av_inv_q(st->time_base);
248  st->codecpar->format = pix_fmt;
251  st->sample_aspect_ratio = (AVRational){ aspectn, aspectd };
252  st->codecpar->chroma_location = chroma_sample_location;
254  st->codecpar->field_order = field_order;
256  if ((int) s->packet_size < 0)
257  return s->packet_size;
258  ffformatcontext(s)->data_offset = data_offset = avio_tell(pb);
259 
260  st->duration = (avio_size(pb) - data_offset) / s->packet_size;
261 
262  return 0;
263 }
264 
266 {
267  int i;
268  char header[MAX_FRAME_HEADER+1];
269  int ret;
270  int64_t off = avio_tell(s->pb);
271 
272  for (i = 0; i < MAX_FRAME_HEADER; i++) {
273  header[i] = avio_r8(s->pb);
274  if (header[i] == '\n') {
275  header[i + 1] = 0;
276  break;
277  }
278  }
279  if (s->pb->error)
280  return s->pb->error;
281  else if (s->pb->eof_reached)
282  return AVERROR_EOF;
283  else if (i == MAX_FRAME_HEADER)
284  return AVERROR_INVALIDDATA;
285 
286  if (strncmp(header, Y4M_FRAME_MAGIC, strlen(Y4M_FRAME_MAGIC)))
287  return AVERROR_INVALIDDATA;
288 
289  ret = av_get_packet(s->pb, pkt, s->packet_size - Y4M_FRAME_MAGIC_LEN);
290  if (ret < 0)
291  return ret;
292  else if (ret != s->packet_size - Y4M_FRAME_MAGIC_LEN) {
293  return s->pb->eof_reached ? AVERROR_EOF : AVERROR(EIO);
294  }
295  pkt->stream_index = 0;
296  pkt->pts = (off - ffformatcontext(s)->data_offset) / s->packet_size;
297  pkt->duration = 1;
298  return 0;
299 }
300 
301 static int yuv4_read_seek(AVFormatContext *s, int stream_index,
302  int64_t pts, int flags)
303 {
304  int64_t pos;
305 
307  pts = FFMAX(0, pts - 1);
308  if (pts < 0)
309  return -1;
310  pos = pts * s->packet_size;
311 
312  if (avio_seek(s->pb, pos + ffformatcontext(s)->data_offset, SEEK_SET) < 0)
313  return -1;
314  return 0;
315 }
316 
317 static int yuv4_probe(const AVProbeData *pd)
318 {
319  /* check file header */
320  if (strncmp(pd->buf, Y4M_MAGIC, sizeof(Y4M_MAGIC) - 1) == 0)
321  return AVPROBE_SCORE_MAX;
322  else
323  return 0;
324 }
325 
327  .name = "yuv4mpegpipe",
328  .long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
329  .read_probe = yuv4_probe,
330  .read_header = yuv4_read_header,
331  .read_packet = yuv4_read_packet,
332  .read_seek = yuv4_read_seek,
333  .extensions = "y4m",
334 };
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:724
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
ffformatcontext
static av_always_inline FFFormatContext * ffformatcontext(AVFormatContext *s)
Definition: internal.h:186
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:579
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:924
Y4M_MAGIC
#define Y4M_MAGIC
Definition: yuv4mpeg.h:24
AV_PIX_FMT_YUV420P10
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:391
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:352
AV_PIX_FMT_GRAY9
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:371
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:389
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:504
pts
static int64_t pts
Definition: transcode_aac.c:653
AV_PIX_FMT_GRAY16
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:375
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:900
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:326
AV_PIX_FMT_YUV444P10
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:394
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:638
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:403
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:317
AV_PIX_FMT_YUV444P16
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:404
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:643
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:388
FFFormatContext::data_offset
int64_t data_offset
offset of the first packet
Definition: internal.h:93
AV_PIX_FMT_YUV420P16
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:402
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:372
AVFormatContext
Format I/O context.
Definition: avformat.h:1109
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1004
AVSEEK_FLAG_BACKWARD
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2163
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:880
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:600
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:602
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:392
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
AVCOL_RANGE_UNSPECIFIED
@ AVCOL_RANGE_UNSPECIFIED
Definition: pixfmt.h:545
yuv4_read_packet
static int yuv4_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: yuv4mpegdec.c:265
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:117
AV_PIX_FMT_YUV422P12
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:396
AV_PIX_FMT_YUV444P12
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:398
AVCHROMA_LOC_UNSPECIFIED
@ AVCHROMA_LOC_UNSPECIFIED
Definition: pixfmt.h:599
AVStream::sample_aspect_ratio
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:913
header
static const uint8_t header[24]
Definition: sdr2.c:67
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:632
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:598
AV_FIELD_BB
@ AV_FIELD_BB
Definition: codec_par.h:40
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
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:562
AV_PIX_FMT_YUV444P9
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:390
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:196
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:857
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:260
pos
unsigned int pos
Definition: spdifenc.c:412
avformat.h
AV_PIX_FMT_YUV420P12
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:395
AVCodecParameters::chroma_location
enum AVChromaLocation chroma_location
Definition: codec_par.h:150
AV_PIX_FMT_YUV422P14
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:400
AVCHROMA_LOC_CENTER
@ AVCHROMA_LOC_CENTER
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:601
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
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, 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:1146
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:301
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:401
avstring.h
AV_PIX_FMT_GRAY12
#define AV_PIX_FMT_GRAY12
Definition: pixfmt.h:373
AVColorRange
AVColorRange
Visual content value range.
Definition: pixfmt.h:544
AV_PIX_FMT_YUV420P14
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:399