FFmpeg
rawvideodec.c
Go to the documentation of this file.
1 /*
2  * RAW video demuxer
3  * Copyright (c) 2001 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 "config_components.h"
23 
24 #include "libavutil/imgutils.h"
25 #include "libavutil/parseutils.h"
26 #include "libavutil/pixdesc.h"
27 #include "libavutil/opt.h"
28 #include "internal.h"
29 #include "avformat.h"
30 
31 typedef struct RawVideoDemuxerContext {
32  const AVClass *class; /**< Class for private options. */
33  int width, height; /**< Integers describing video size, set by a private option. */
34  char *pixel_format; /**< Set by a private option. */
35  AVRational framerate; /**< AVRational describing framerate, set by a private option. */
37 
38 // v210 frame width is padded to multiples of 48
39 #define GET_PACKET_SIZE(w, h) (((w + 47) / 48) * 48 * h * 8 / 3)
40 
42 {
45  AVStream *st;
46  int packet_size;
47  int ret;
48 
50  if (!st)
51  return AVERROR(ENOMEM);
52 
54 
56 
59  if ((pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
60  av_log(ctx, AV_LOG_ERROR, "No such pixel format: %s.\n",
61  s->pixel_format);
62  return AVERROR(EINVAL);
63  }
64  }
65 
66  avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num);
67 
68  ret = av_image_check_size(s->width, s->height, 0, ctx);
69  if (ret < 0)
70  return ret;
71 
72  st->codecpar->width = s->width;
73  st->codecpar->height = s->height;
74 
76  unsigned int pgroup; /* size of the pixel group in bytes */
77  unsigned int xinc;
78  const AVPixFmtDescriptor *desc;
79  int tag;
80 
84  tag = MKTAG('U', 'Y', 'V', 'Y');
85  pgroup = 5;
86  xinc = 2;
87  } else if (pix_fmt == AV_PIX_FMT_UYVY422) {
88  tag = MKTAG('U', 'Y', 'V', 'Y');
89  pgroup = 4;
90  xinc = 2;
92  } else {
93  av_log(ctx, AV_LOG_ERROR, "unsupported format: %s for bitpacked.\n",
94  s->pixel_format);
95  return AVERROR(EINVAL);
96  }
97  st->codecpar->codec_tag = tag;
98  packet_size = s->width * s->height * pgroup / xinc;
99  } else if ((ctx->iformat->raw_codec_id == AV_CODEC_ID_V210) ||
103 
104  packet_size = GET_PACKET_SIZE(s->width, s->height);
105  } else {
106  packet_size = av_image_get_buffer_size(pix_fmt, s->width, s->height, 1);
107  if (packet_size < 0)
108  return packet_size;
109  }
110  if (packet_size == 0)
111  return AVERROR(EINVAL);
112 
113  st->codecpar->format = pix_fmt;
114  ctx->packet_size = packet_size;
116  (AVRational){8,1}, st->time_base);
117 
118  return 0;
119 }
120 
121 
123 {
124  int ret;
125 
126  ret = av_get_packet(s->pb, pkt, s->packet_size);
127  pkt->pts = pkt->dts = pkt->pos / s->packet_size;
128 
129  pkt->stream_index = 0;
130  if (ret < 0)
131  return ret;
132  return 0;
133 }
134 
135 #define OFFSET(x) offsetof(RawVideoDemuxerContext, x)
136 #define DEC AV_OPT_FLAG_DECODING_PARAM
137 static const AVOption rawvideo_options[] = {
138  /* pixel_format is not used by the v210 demuxers. */
139  { "pixel_format", "set pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = "yuv420p"}, 0, 0, DEC },
140  { "video_size", "set frame size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
141  { "framerate", "set frame rate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC },
142  { NULL },
143 };
144 
146  .class_name = "rawvideo demuxer",
147  .item_name = av_default_item_name,
148  .option = rawvideo_options,
149  .version = LIBAVUTIL_VERSION_INT,
150 };
151 
153  .name = "rawvideo",
154  .long_name = NULL_IF_CONFIG_SMALL("raw video"),
155  .priv_data_size = sizeof(RawVideoDemuxerContext),
159  .extensions = "yuv,cif,qcif,rgb",
160  .raw_codec_id = AV_CODEC_ID_RAWVIDEO,
161  .priv_class = &rawvideo_demuxer_class,
162 };
163 
165  .class_name = "bitpacked demuxer",
166  .item_name = av_default_item_name,
167  .option = rawvideo_options,
168  .version = LIBAVUTIL_VERSION_INT,
169 };
170 
171 #if CONFIG_BITPACKED_DEMUXER
173  .name = "bitpacked",
174  .long_name = NULL_IF_CONFIG_SMALL("Bitpacked"),
175  .priv_data_size = sizeof(RawVideoDemuxerContext),
179  .extensions = "bitpacked",
180  .raw_codec_id = AV_CODEC_ID_BITPACKED,
181  .priv_class = &bitpacked_demuxer_class,
182 };
183 #endif // CONFIG_BITPACKED_DEMUXER
184 
185 static const AVClass v210_demuxer_class = {
186  .class_name = "v210(x) demuxer",
187  .item_name = av_default_item_name,
188  .option = rawvideo_options + 1,
189  .version = LIBAVUTIL_VERSION_INT,
190 };
191 
192 #if CONFIG_V210_DEMUXER
194  .name = "v210",
195  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
196  .priv_data_size = sizeof(RawVideoDemuxerContext),
200  .extensions = "v210",
201  .raw_codec_id = AV_CODEC_ID_V210,
202  .priv_class = &v210_demuxer_class,
203 };
204 #endif // CONFIG_V210_DEMUXER
205 
206 #if CONFIG_V210X_DEMUXER
208  .name = "v210x",
209  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
210  .priv_data_size = sizeof(RawVideoDemuxerContext),
214  .extensions = "yuv10",
215  .raw_codec_id = AV_CODEC_ID_V210X,
216  .priv_class = &v210_demuxer_class,
217 };
218 #endif // CONFIG_V210X_DEMUXER
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
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
opt.h
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: options.c:237
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:58
AVInputFormat::raw_codec_id
int raw_codec_id
Raw demuxers store their codec ID here.
Definition: avformat.h:705
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2858
AV_OPT_TYPE_VIDEO_RATE
@ AV_OPT_TYPE_VIDEO_RATE
offset must point to AVRational
Definition: opt.h:238
AV_CODEC_ID_RAWVIDEO
@ AV_CODEC_ID_RAWVIDEO
Definition: codec_id.h:65
pixdesc.h
AVOption
AVOption.
Definition: opt.h:251
av_get_bits_per_pixel
int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel used by the pixel format described by pixdesc.
Definition: pixdesc.c:2810
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:66
RawVideoDemuxerContext::framerate
AVRational framerate
AVRational describing framerate, set by a private option.
Definition: rawvideodec.c:35
rawvideo_options
static const AVOption rawvideo_options[]
Definition: rawvideodec.c:137
framerate
int framerate
Definition: h264_levels.c:65
RawVideoDemuxerContext
Definition: rawvideodec.c:31
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: avformat.c:763
ff_rawvideo_demuxer
const AVInputFormat ff_rawvideo_demuxer
Definition: rawvideodec.c:152
AVFMT_GENERIC_INDEX
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:482
rawvideo_read_header
static int rawvideo_read_header(AVFormatContext *ctx)
Definition: rawvideodec.c:41
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:656
AV_PIX_FMT_YUV422P16
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:471
width
#define width
s
#define s(width, name)
Definition: cbs_vp9.c:256
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:661
AVFormatContext::iformat
const struct AVInputFormat * iformat
The input container format.
Definition: avformat.h:1228
AVCodecParameters::width
int width
Video only.
Definition: codec_par.h:128
ctx
AVFormatContext * ctx
Definition: movenc.c:48
av_rescale_q
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
pix_fmt
static enum AVPixelFormat pix_fmt
Definition: demuxing_decoding.c:41
ff_bitpacked_demuxer
const AVInputFormat ff_bitpacked_demuxer
AVFormatContext
Format I/O context.
Definition: avformat.h:1216
OFFSET
#define OFFSET(x)
Definition: rawvideodec.c:135
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1108
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:540
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
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:978
NULL
#define NULL
Definition: coverity.c:32
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AV_OPT_TYPE_IMAGE_SIZE
@ AV_OPT_TYPE_IMAGE_SIZE
offset must point to two consecutive integers
Definition: opt.h:235
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:237
parseutils.h
AV_PIX_FMT_YUV422P10
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:460
GET_PACKET_SIZE
#define GET_PACKET_SIZE(w, h)
Definition: rawvideodec.c:39
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:115
RawVideoDemuxerContext::pixel_format
char * pixel_format
Set by a private option.
Definition: rawvideodec.c:34
ff_v210_demuxer
const AVInputFormat ff_v210_demuxer
RawVideoDemuxerContext::height
int height
Integers describing video size, set by a private option.
Definition: rawvideodec.c:33
rawvideo_read_packet
static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: rawvideodec.c:122
AV_CODEC_ID_V210
@ AV_CODEC_ID_V210
Definition: codec_id.h:179
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:373
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_CODEC_ID_V210X
@ AV_CODEC_ID_V210X
Definition: codec_id.h:177
DEC
#define DEC
Definition: rawvideodec.c:136
AV_CODEC_ID_BITPACKED
@ AV_CODEC_ID_BITPACKED
Definition: codec_id.h:284
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:367
AVCodecParameters::height
int height
Definition: codec_par.h:129
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:102
tag
uint32_t tag
Definition: movenc.c:1647
ret
ret
Definition: filter_design.txt:187
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
AVStream
Stream structure.
Definition: avformat.h:948
AVClass::class_name
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:71
v210_demuxer_class
static const AVClass v210_demuxer_class
Definition: rawvideodec.c:185
avformat.h
AV_PIX_FMT_UYVY422
@ AV_PIX_FMT_UYVY422
packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
Definition: pixfmt.h:81
av_get_pix_fmt
enum AVPixelFormat av_get_pix_fmt(const char *name)
Return the pixel format corresponding to name.
Definition: pixdesc.c:2790
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AVPacket::stream_index
int stream_index
Definition: packet.h:376
AVFormatContext::packet_size
unsigned int packet_size
Definition: avformat.h:1327
desc
const char * desc
Definition: libsvtav1.c:83
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:104
ff_v210x_demuxer
const AVInputFormat ff_v210x_demuxer
AVCodecParameters::format
int format
Definition: codec_par.h:86
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:62
AVPacket
This structure stores compressed data.
Definition: packet.h:351
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:394
RawVideoDemuxerContext::width
int width
Definition: rawvideodec.c:33
imgutils.h
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:91
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
bitpacked_demuxer_class
static const AVClass bitpacked_demuxer_class
Definition: rawvideodec.c:164
MKTAG
#define MKTAG(a, b, c, d)
Definition: macros.h:55
rawvideo_demuxer_class
static const AVClass rawvideo_demuxer_class
Definition: rawvideodec.c:145
av_image_check_size
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
Definition: imgutils.c:318
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1244