rawvideodec.c
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1 /*
2  * RAW video demuxer
3  * Copyright (c) 2001 Fabrice Bellard
4  *
5  * This file is part of Libav.
6  *
7  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "avformat.h"
23 #include "rawdec.h"
24 
26 {
27  int packet_size, ret, width, height;
28  AVStream *st = s->streams[0];
29 
30  width = st->codec->width;
31  height = st->codec->height;
32 
33  packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
34  if (packet_size < 0)
35  return -1;
36 
37  ret= av_get_packet(s->pb, pkt, packet_size);
38  pkt->pts=
39  pkt->dts= pkt->pos / packet_size;
40 
41  pkt->stream_index = 0;
42  if (ret < 0)
43  return ret;
44  return 0;
45 }
46 
47 #define OFFSET(x) offsetof(FFRawVideoDemuxerContext, x)
48 #define DEC AV_OPT_FLAG_DECODING_PARAM
49 static const AVOption rawvideo_options[] = {
50  { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
51  { "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = "yuv420p"}, 0, 0, DEC },
52  { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, DEC },
53  { NULL },
54 };
55 
57  .class_name = "rawvideo demuxer",
58  .item_name = av_default_item_name,
59  .option = rawvideo_options,
60  .version = LIBAVUTIL_VERSION_INT,
61 };
62 
64  .name = "rawvideo",
65  .long_name = NULL_IF_CONFIG_SMALL("raw video format"),
66  .priv_data_size = sizeof(FFRawVideoDemuxerContext),
70  .extensions = "yuv,cif,qcif,rgb",
71  .value = CODEC_ID_RAWVIDEO,
72  .priv_class = &rawvideo_demuxer_class,
73 };
enum PixelFormat pix_fmt
Pixel format, see PIX_FMT_xxx.
Definition: avcodec.h:1426
AVOption.
Definition: opt.h:244
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:933
struct FFRawVideoDemuxerContext FFRawVideoDemuxerContext
int width
Definition: rotozoom.c:164
static const AVOption rawvideo_options[]
Definition: rawvideodec.c:49
static const AVClass rawvideo_demuxer_class
Definition: rawvideodec.c:56
static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: rawvideodec.c:25
Format I/O context.
Definition: avformat.h:863
#define OFFSET(x)
Definition: rawvideodec.c:47
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:38
AVStream ** streams
Definition: avformat.h:908
static int read_header(FFV1Context *f)
Definition: ffv1.c:1513
static int flags
Definition: log.c:34
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:269
int avpicture_get_size(enum PixelFormat 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: imgconvert.c:476
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:191
AVCodecContext * codec
codec context
Definition: avformat.h:623
int ff_raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
Definition: rawdec.c:32
int width
picture width / height.
Definition: avcodec.h:1408
LIBAVUTIL_VERSION_INT
Definition: eval.c:50
Stream structure.
Definition: avformat.h:620
NULL
Definition: eval.c:50
AVIOContext * pb
Definition: avformat.h:896
av_default_item_name
Definition: dnxhdenc.c:43
AVInputFormat ff_rawvideo_demuxer
Definition: rawvideodec.c:63
static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
Definition: libcdio.c:109
Describe the class of an AVClass context structure.
Definition: log.h:33
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:376
int height
Definition: gxfenc.c:73
Main libavformat public API header.
#define DEC
Definition: rawvideodec.c:48
static int64_t video_size
Definition: avconv.c:132
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:907
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:460
int stream_index
Definition: avcodec.h:910
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:901