FFmpeg
Data Structures | Macros | Functions | Variables
tty.c File Reference

Tele-typewriter demuxer. More...

#include "libavutil/intreadwrite.h"
#include "libavutil/avstring.h"
#include "libavutil/log.h"
#include "libavutil/dict.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "avformat.h"
#include "internal.h"
#include "sauce.h"

Go to the source code of this file.

Data Structures

struct  TtyDemuxContext
 

Macros

#define GET_EFI_META(name, size)
 
#define OFFSET(x)   offsetof(TtyDemuxContext, x)
 
#define DEC   AV_OPT_FLAG_DECODING_PARAM
 

Functions

static int efi_read (AVFormatContext *avctx, uint64_t start_pos)
 Parse EFI header. More...
 
static int read_header (AVFormatContext *avctx)
 
static int read_packet (AVFormatContext *avctx, AVPacket *pkt)
 

Variables

static const AVOption options []
 
static const AVClass tty_demuxer_class
 
AVInputFormat ff_tty_demuxer
 

Detailed Description

Tele-typewriter demuxer.

Definition in file tty.c.

Macro Definition Documentation

#define GET_EFI_META (   name,
  size 
)
Value:
len = avio_r8(pb); \
if (len < 1 || len > size) \
if (avio_read(pb, buf, size) == size) { \
buf[len] = 0; \
av_dict_set(&avctx->metadata, name, buf, 0); \
}
ptrdiff_t size
Definition: opengl_enc.c:100
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:650
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:641
if(ret)
void * buf
Definition: avisynth_c.h:766
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
int len
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a it should return
const char * name
Definition: opengl_enc.c:102

Referenced by efi_read().

#define OFFSET (   x)    offsetof(TtyDemuxContext, x)

Definition at line 136 of file tty.c.

#define DEC   AV_OPT_FLAG_DECODING_PARAM

Definition at line 137 of file tty.c.

Function Documentation

static int efi_read ( AVFormatContext avctx,
uint64_t  start_pos 
)
static

Parse EFI header.

Definition at line 48 of file tty.c.

Referenced by read_header().

static int read_header ( AVFormatContext avctx)
static

Definition at line 75 of file tty.c.

static int read_packet ( AVFormatContext avctx,
AVPacket pkt 
)
static

Definition at line 111 of file tty.c.

Variable Documentation

const AVOption options[]
static
Initial value:
= {
{ "chars_per_frame", "", 0x42, AV_OPT_TYPE_INT, {.i64 = 6000}, 1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM},
{ "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
{ "framerate", "", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC },
{ NULL },
}
#define NULL
Definition: coverity.c:32
int framerate
Definition: h264_levels.c:65
#define OFFSET(x)
Definition: tty.c:136
#define DEC
Definition: tty.c:137
#define width
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:277
offset must point to AVRational
Definition: opt.h:236
offset must point to two consecutive integers
Definition: opt.h:233

Definition at line 138 of file tty.c.

const AVClass tty_demuxer_class
static
Initial value:
= {
.class_name = "TTY demuxer",
.item_name = av_default_item_name,
.option = options,
}
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
static const AVOption options[]
Definition: tty.c:138

Definition at line 145 of file tty.c.

AVInputFormat ff_tty_demuxer
Initial value:
= {
.name = "tty",
.long_name = NULL_IF_CONFIG_SMALL("Tele-typewriter"),
.priv_data_size = sizeof(TtyDemuxContext),
.extensions = "ans,art,asc,diz,ice,nfo,txt,vt",
.priv_class = &tty_demuxer_class,
}
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
static int read_header(AVFormatContext *avctx)
Definition: tty.c:75
static const AVClass tty_demuxer_class
Definition: tty.c:145
static int read_packet(AVFormatContext *avctx, AVPacket *pkt)
Definition: tty.c:111

Definition at line 152 of file tty.c.