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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
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  */
22 #include "libavutil/parseutils.h"
23 #include "libavutil/pixdesc.h"
24 #include "libavutil/opt.h"
25 #include "internal.h"
26 #include "avformat.h"
28 typedef struct RawVideoDemuxerContext {
29  const AVClass *class; /**< Class for private options. */
30  int width, height; /**< Integers describing video size, set by a private option. */
31  char *pixel_format; /**< Set by a private option. */
32  AVRational framerate; /**< AVRational describing framerate, set by a private option. */
37 {
40  AVStream *st;
42  st = avformat_new_stream(ctx, NULL);
43  if (!st)
44  return AVERROR(ENOMEM);
48  st->codec->codec_id = ctx->iformat->raw_codec_id;
50  if ((pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
51  av_log(ctx, AV_LOG_ERROR, "No such pixel format: %s.\n",
52  s->pixel_format);
53  return AVERROR(EINVAL);
54  }
58  st->codec->width = s->width;
59  st->codec->height = s->height;
60  st->codec->pix_fmt = pix_fmt;
62  (AVRational){8,1}, st->time_base);
64  return 0;
65 }
69 {
70  int packet_size, ret, width, height;
71  AVStream *st = s->streams[0];
73  width = st->codec->width;
74  height = st->codec->height;
76  packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
77  if (packet_size < 0)
78  return -1;
80  ret = av_get_packet(s->pb, pkt, packet_size);
81  pkt->pts = pkt->dts = pkt->pos / packet_size;
83  pkt->stream_index = 0;
84  if (ret < 0)
85  return ret;
86  return 0;
87 }
89 #define OFFSET(x) offsetof(RawVideoDemuxerContext, x)
91 static const AVOption rawvideo_options[] = {
92  { "video_size", "set frame size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
93  { "pixel_format", "set pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = "yuv420p"}, 0, 0, DEC },
94  { "framerate", "set frame rate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, DEC },
95  { NULL },
96 };
99  .class_name = "rawvideo demuxer",
100  .item_name = av_default_item_name,
101  .option = rawvideo_options,
102  .version = LIBAVUTIL_VERSION_INT,
103 };
106  .name = "rawvideo",
107  .long_name = NULL_IF_CONFIG_SMALL("raw video"),
108  .priv_data_size = sizeof(RawVideoDemuxerContext),
112  .extensions = "yuv,cif,qcif,rgb",
113  .raw_codec_id = AV_CODEC_ID_RAWVIDEO,
114  .priv_class = &rawvideo_demuxer_class,
115 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
static enum AVPixelFormat pix_fmt
Definition: opt.h:255
Definition: version.h:62
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1448
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:4083
int num
Definition: rational.h:44
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1722
static const AVOption rawvideo_options[]
Definition: rawvideodec.c:91
static AVPacket pkt
static const AVClass rawvideo_demuxer_class
Definition: rawvideodec.c:98
static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: rawvideodec.c:68
Format I/O context.
Definition: avformat.h:1273
#define OFFSET(x)
Definition: rawvideodec.c:89
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
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3749
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1341
AVRational framerate
AVRational describing framerate, set by a private option.
Definition: rawvideodec.c:32
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:244
#define av_log(a,...)
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:140
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:861
int bit_rate
the average bitrate
Definition: avcodec.h:1567
int width
picture width / height.
Definition: avcodec.h:1681
static int rawvideo_read_header(AVFormatContext *ctx)
Definition: rawvideodec.c:36
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:623
Stream structure.
Definition: avformat.h:842
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
enum AVMediaType codec_type
Definition: avcodec.h:1510
enum AVCodecID codec_id
Definition: avcodec.h:1519
AVIOContext * pb
I/O context.
Definition: avformat.h:1315
int height
Integers describing video size, set by a private option.
Definition: rawvideodec.c:30
AVInputFormat ff_rawvideo_demuxer
Definition: rawvideodec.c:105
BYTE int const BYTE int int int height
Definition: avisynth_c.h:676
Describe the class of an AVClass context structure.
Definition: log.h:67
Use generic index building code.
Definition: avformat.h:473
rational number numerator/denominator
Definition: rational.h:43
offset must point to AVRational
Definition: opt.h:235
char * pixel_format
Set by a private option.
Definition: rawvideodec.c:31
offset must point to two consecutive integers
Definition: opt.h:232
misc parsing utilities
int raw_codec_id
Raw demuxers store their codec ID here.
Definition: avformat.h:674
static int flags
Definition: cpu.c:47
Main libavformat public API header.
int den
Definition: rational.h:45
struct AVInputFormat * iformat
The input container format.
Definition: avformat.h:1285
#define DEC
Definition: rawvideodec.c:90
void * priv_data
Format private data.
Definition: avformat.h:1301
int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height)
Calculate the size in bytes that a picture of the given width and height would occupy if stored in th...
Definition: avpicture.c:49
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1422
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:628
enum AVPixelFormat av_get_pix_fmt(const char *name)
Return the pixel format corresponding to name.
Definition: pixdesc.c:2062
int stream_index
Definition: avcodec.h:1425
Pixel format.
Definition: pixfmt.h:61
This structure stores compressed data.
Definition: avcodec.h:1400
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1416
static int width