nutenc.c File Reference

#include <stdint.h>
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "libavutil/mem.h"
#include "libavutil/tree.h"
#include "libavutil/dict.h"
#include "libavutil/avassert.h"
#include "libavutil/time.h"
#include "libavutil/opt.h"
#include "libavcodec/bytestream.h"
#include "libavcodec/mpegaudiodata.h"
#include "mux.h"
#include "nut.h"
#include "internal.h"
#include "avio_internal.h"
#include "riff.h"
#include "version.h"

Go to the source code of this file.

Macros
#define	OFFSET(x)   offsetof(NUTContext, x)
#define	E   AV_OPT_FLAG_ENCODING_PARAM

Functions
static AVRational	choose_timebase (AVFormatContext *s, AVStream *st, int min_precision)
	Chooses a timebase for muxing the specified stream. More...
static int	find_expected_header (AVCodecParameters *p, int size, int key_frame, uint8_t out[64])
static int	find_header_idx (AVFormatContext *s, AVCodecParameters *p, int size, int frame_type)
static void	build_elision_headers (AVFormatContext *s)
static void	build_frame_code (AVFormatContext *s)
static int	get_v_length (uint64_t val)
	Get the length in bytes which is needed to store val as v. More...
static void	put_v (AVIOContext *bc, uint64_t val)
	Put val using a variable number of bytes. More...
static void	put_tt (NUTContext *nut, AVRational *time_base, AVIOContext *bc, uint64_t val)
static void	put_str (AVIOContext *bc, const char *string)
	Store a string as vb. More...
static void	put_s (AVIOContext *bc, int64_t val)
static void	put_packet (NUTContext *nut, AVIOContext *bc, AVIOContext *dyn_bc, uint64_t startcode)
static void	write_mainheader (NUTContext *nut, AVIOContext *bc)
static int	write_streamheader (AVFormatContext *avctx, AVIOContext *bc, AVStream *st, int i)
static int	add_info (AVIOContext *bc, const char *type, const char *value)
static int	write_globalinfo (NUTContext *nut, AVIOContext *bc)
static int	write_streaminfo (NUTContext *nut, AVIOContext *bc, int stream_id)
static int	write_chapter (NUTContext *nut, AVIOContext *bc, int id)
static int	write_index (NUTContext *nut, AVIOContext *bc)
static int	write_headers (AVFormatContext *avctx, AVIOContext *bc)
static int	nut_write_header (AVFormatContext *s)
static int	get_needed_flags (NUTContext *nut, StreamContext *nus, FrameCode *fc, AVPacket *pkt)
static int	find_best_header_idx (NUTContext *nut, AVPacket *pkt)
static int	write_sm_data (AVFormatContext *s, AVIOContext *bc, AVPacket *pkt, int is_meta)
static int	nut_write_packet (AVFormatContext *s, AVPacket *pkt)
static int	nut_write_trailer (AVFormatContext *s)
static void	nut_write_deinit (AVFormatContext *s)

Variables
static const AVOption	options []
class {
class_name = "nutenc"
item_name = av_default_item_name
option = options
version = LIBAVUTIL_VERSION_INT
};
const FFOutputFormat	ff_nut_muxer

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(NUTContext, x)

Definition at line 1224 of file nutenc.c.

E

#define E   AV_OPT_FLAG_ENCODING_PARAM

Definition at line 1225 of file nutenc.c.

Function Documentation

choose_timebase()

static AVRational choose_timebase ( AVFormatContext *  s, AVStream *  st, int  min_precision  )

static

Chooses a timebase for muxing the specified stream.

The chosen timebase allows sample accurate timestamps based on the framerate or sample rate for audio streams. It also is at least as precise as 1/min_precision would be.

Definition at line 48 of file nutenc.c.

Referenced by nut_write_header().

find_expected_header()

static int find_expected_header ( AVCodecParameters *  p, int  size, int  key_frame, uint8_t  out[64]  )

static

Definition at line 61 of file nutenc.c.

Referenced by find_header_idx().

find_header_idx()

static int find_header_idx ( AVFormatContext *  s, AVCodecParameters *  p, int  size, int  frame_type  )

static

Definition at line 128 of file nutenc.c.

Referenced by build_frame_code().

build_elision_headers()

static void build_elision_headers ( AVFormatContext *  s )

static

Definition at line 145 of file nutenc.c.

Referenced by nut_write_header().

build_frame_code()

static void build_frame_code ( AVFormatContext *  s )

static

Definition at line 167 of file nutenc.c.

Referenced by nut_write_header().

get_v_length()

static int get_v_length ( uint64_t  val )

static

Get the length in bytes which is needed to store val as v.

Definition at line 306 of file nutenc.c.

Referenced by nut_write_packet(), and put_v().

put_v()

static void put_v ( AVIOContext *  bc, uint64_t  val  )

static

Put val using a variable number of bytes.

Definition at line 319 of file nutenc.c.

Referenced by nut_write_packet(), put_packet(), put_s(), put_str(), put_tt(), write_chapter(), write_globalinfo(), write_index(), write_mainheader(), write_sm_data(), write_streamheader(), and write_streaminfo().

put_tt()

static void put_tt ( NUTContext *  nut, AVRational *  time_base, AVIOContext *  bc, uint64_t  val  )

static

Definition at line 329 of file nutenc.c.

Referenced by nut_write_packet(), write_chapter(), and write_index().

put_str()

static void put_str ( AVIOContext *  bc, const char *  string  )

static

Store a string as vb.

Definition at line 338 of file nutenc.c.

Referenced by add_info(), and write_sm_data().

put_s()

static void put_s ( AVIOContext *  bc, int64_t  val  )

static

Definition at line 346 of file nutenc.c.

Referenced by add_info(), write_chapter(), write_mainheader(), and write_sm_data().

put_packet()

static void put_packet ( NUTContext *  nut, AVIOContext *  bc, AVIOContext *  dyn_bc, uint64_t  startcode  )

static

Definition at line 351 of file nutenc.c.

Referenced by nut_write_packet(), nut_write_trailer(), and write_headers().

write_mainheader()

static void write_mainheader ( NUTContext *  nut, AVIOContext *  bc  )

static

Definition at line 372 of file nutenc.c.

Referenced by write_headers().

write_streamheader()

static int write_streamheader ( AVFormatContext *  avctx, AVIOContext *  bc, AVStream *  st, int  i  )

static

Definition at line 452 of file nutenc.c.

Referenced by write_headers().

add_info()

static int add_info ( AVIOContext *  bc, const char *  type, const char *  value  )

static

Definition at line 509 of file nutenc.c.

Referenced by write_chapter(), write_globalinfo(), and write_streaminfo().

write_globalinfo()

static int write_globalinfo ( NUTContext *  nut, AVIOContext *  bc  )

static

Definition at line 517 of file nutenc.c.

Referenced by write_headers().

write_streaminfo()

static int write_streaminfo ( NUTContext *  nut, AVIOContext *  bc, int  stream_id  )

static

Definition at line 545 of file nutenc.c.

Referenced by write_headers().

write_chapter()

static int write_chapter ( NUTContext *  nut, AVIOContext *  bc, int  id  )

static

Definition at line 587 of file nutenc.c.

Referenced by write_headers().

write_index()

static int write_index ( NUTContext *  nut, AVIOContext *  bc  )

static

Definition at line 615 of file nutenc.c.

Referenced by nut_write_trailer().

write_headers()

static int write_headers ( AVFormatContext *  avctx, AVIOContext *  bc  )

static

Definition at line 667 of file nutenc.c.

Referenced by nut_write_header(), nut_write_packet(), and nut_write_trailer().

nut_write_header()

static int nut_write_header ( AVFormatContext *  s )

static

Definition at line 719 of file nutenc.c.

get_needed_flags()

static int get_needed_flags ( NUTContext *  nut, StreamContext *  nus, FrameCode *  fc, AVPacket *  pkt  )

static

Definition at line 805 of file nutenc.c.

Referenced by nut_write_packet().

find_best_header_idx()

static int find_best_header_idx ( NUTContext *  nut, AVPacket *  pkt  )

static

Definition at line 834 of file nutenc.c.

Referenced by nut_write_packet().

write_sm_data()

static int write_sm_data ( AVFormatContext *  s, AVIOContext *  bc, AVPacket *  pkt, int  is_meta  )

static

Definition at line 853 of file nutenc.c.

Referenced by nut_write_packet().

nut_write_packet()

static int nut_write_packet ( AVFormatContext *  s, AVPacket *  pkt  )

static

Definition at line 963 of file nutenc.c.

nut_write_trailer()

static int nut_write_trailer ( AVFormatContext *  s )

static

Definition at line 1186 of file nutenc.c.

nut_write_deinit()

static void nut_write_deinit ( AVFormatContext *  s )

static

Definition at line 1209 of file nutenc.c.

Variable Documentation

options

const AVOption options[]

static

Initial value:

= {
    { "syncpoints",  "NUT syncpoint behaviour",                         OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0},             INT_MIN, INT_MAX, E, .unit = "syncpoints" },
    { "default",     "",                                                0,             AV_OPT_TYPE_CONST, {.i64 = 0},             INT_MIN, INT_MAX, E, .unit = "syncpoints" },
    { "none",        "Disable syncpoints, low overhead and unseekable", 0,             AV_OPT_TYPE_CONST, {.i64 = NUT_PIPE},      INT_MIN, INT_MAX, E, .unit = "syncpoints" },
    { "timestamped", "Extend syncpoints with a wallclock timestamp",    0,             AV_OPT_TYPE_CONST, {.i64 = NUT_BROADCAST}, INT_MIN, INT_MAX, E, .unit = "syncpoints" },
    { "write_index", "Write index",                               OFFSET(write_index), AV_OPT_TYPE_BOOL,  {.i64 = 1},                   0,       1, E, },
    { NULL },
}

Definition at line 1226 of file nutenc.c.

class_name

class_name = "nutenc"

private

Definition at line 1236 of file nutenc.c.

item_name

item_name = av_default_item_name

private

Definition at line 1237 of file nutenc.c.

option

option = options

private

Definition at line 1238 of file nutenc.c.

version

version = LIBAVUTIL_VERSION_INT

private

Definition at line 1239 of file nutenc.c.

@420

const { ... }

ff_nut_muxer

const FFOutputFormat ff_nut_muxer

Initial value:

= {
    .p.name         = "nut",
    .p.long_name    = NULL_IF_CONFIG_SMALL("NUT"),
    .p.mime_type    = "video/x-nut",
    .p.extensions   = "nut",
    .priv_data_size = sizeof(NUTContext),
    .p.audio_codec  = CONFIG_LIBVORBIS ? AV_CODEC_ID_VORBIS :
                      CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_MP2,
    .p.video_codec  = AV_CODEC_ID_MPEG4,
    .write_header   = nut_write_header,
    .write_packet   = nut_write_packet,
    .write_trailer  = nut_write_trailer,
    .deinit         = nut_write_deinit,
    .p.flags        = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS,
    .p.codec_tag    = ff_nut_codec_tags,
    .p.priv_class   = &class,
}

Definition at line 1242 of file nutenc.c.