libavformat/oggenc.c File Reference

#include "libavutil/crc.h"
#include "libavutil/opt.h"
#include "libavutil/mathematics.h"
#include "libavutil/random_seed.h"
#include "libavcodec/xiph.h"
#include "libavcodec/bytestream.h"
#include "libavcodec/flac.h"
#include "avformat.h"
#include "avio_internal.h"
#include "internal.h"
#include "vorbiscomment.h"

Go to the source code of this file.

Data Structures
struct	OGGPage
struct	OGGStreamContext
struct	OGGPageList
struct	OGGContext
Defines
#define	MAX_PAGE_SIZE   65025
#define	OFFSET(x)   offsetof(OGGContext, x)
#define	PARAM   AV_OPT_FLAG_ENCODING_PARAM
#define	SPEEX_HEADER_SIZE   80
Functions
static void	ogg_update_checksum (AVFormatContext *s, AVIOContext *pb, int64_t crc_offset)
static int	ogg_write_page (AVFormatContext *s, OGGPage *page, int extra_flags)
static int	ogg_key_granule (OGGStreamContext *oggstream, int64_t granule)
static int64_t	ogg_granule_to_timestamp (OGGStreamContext *oggstream, int64_t granule)
static int	ogg_compare_granule (AVFormatContext *s, OGGPage *next, OGGPage *page)
static int	ogg_reset_cur_page (OGGStreamContext *oggstream)
static int	ogg_buffer_page (AVFormatContext *s, OGGStreamContext *oggstream)
static int	ogg_buffer_data (AVFormatContext *s, AVStream *st, uint8_t *data, unsigned size, int64_t granule, int header)
static uint8_t *	ogg_write_vorbiscomment (int offset, int bitexact, int *header_len, AVDictionary **m, int framing_bit)
static int	ogg_build_flac_headers (AVCodecContext *avctx, OGGStreamContext *oggstream, int bitexact, AVDictionary **m)
static int	ogg_build_speex_headers (AVCodecContext *avctx, OGGStreamContext *oggstream, int bitexact, AVDictionary **m)
static int	ogg_write_header (AVFormatContext *s)
static void	ogg_write_pages (AVFormatContext *s, int flush)
static int	ogg_write_packet (AVFormatContext *s, AVPacket *pkt)
static int	ogg_write_trailer (AVFormatContext *s)
Variables
static const AVOption	options []
static const AVClass	ogg_muxer_class
AVOutputFormat	ff_ogg_muxer

---

Define Documentation

#define MAX_PAGE_SIZE   65025

Definition at line 35 of file oggenc.c.

#define OFFSET

(

x

)

offsetof(OGGContext, x)

Definition at line 73 of file oggenc.c.

#define PARAM   AV_OPT_FLAG_ENCODING_PARAM

Definition at line 74 of file oggenc.c.

#define SPEEX_HEADER_SIZE   80

Definition at line 323 of file oggenc.c.

Referenced by ogg_build_speex_headers().

---

Function Documentation

static int ogg_buffer_data	(	AVFormatContext *	s,
		AVStream *	st,
		uint8_t *	data,
		unsigned	size,
		int64_t	granule,
		int	header
	)			[static]

Definition at line 202 of file oggenc.c.

Referenced by ogg_write_header(), and ogg_write_packet().

static int ogg_buffer_page	(	AVFormatContext *	s,
		OGGStreamContext *	oggstream
	)			[static]

Definition at line 178 of file oggenc.c.

Referenced by ogg_buffer_data(), ogg_write_header(), and ogg_write_trailer().

static int ogg_build_flac_headers	(	AVCodecContext *	avctx,
		OGGStreamContext *	oggstream,
		int	bitexact,
		AVDictionary **	m
	)			[static]

Definition at line 285 of file oggenc.c.

Referenced by ogg_write_header().

static int ogg_build_speex_headers	(	AVCodecContext *	avctx,
		OGGStreamContext *	oggstream,
		int	bitexact,
		AVDictionary **	m
	)			[static]

Definition at line 325 of file oggenc.c.

Referenced by ogg_write_header().

static int ogg_compare_granule	(	AVFormatContext *	s,
		OGGPage *	next,
		OGGPage *	page
	)			[static]

Definition at line 153 of file oggenc.c.

Referenced by ogg_buffer_page().

static int64_t ogg_granule_to_timestamp	(	OGGStreamContext *	oggstream,
		int64_t	granule
	)			[static]

Definition at line 144 of file oggenc.c.

Referenced by ogg_buffer_data(), and ogg_compare_granule().

static int ogg_key_granule	(	OGGStreamContext *	oggstream,
		int64_t	granule
	)			[static]

Definition at line 139 of file oggenc.c.

Referenced by ogg_buffer_data().

static int ogg_reset_cur_page

(

OGGStreamContext *

oggstream

)

[static]

Definition at line 169 of file oggenc.c.

Referenced by ogg_buffer_page().

static void ogg_update_checksum	(	AVFormatContext *	s,
		AVIOContext *	pb,
		int64_t	crc_offset
	)			[static]

Definition at line 92 of file oggenc.c.

Referenced by ogg_write_page().

static int ogg_write_header

(

AVFormatContext *

s

)

[static]

KFGSHIFT is the width of the less significant section of the granule position The less significant section is the frame count since the last keyframe

Definition at line 352 of file oggenc.c.

static int ogg_write_packet	(	AVFormatContext *	s,
		AVPacket *	pkt
	)			[static]

Definition at line 487 of file oggenc.c.

static int ogg_write_page	(	AVFormatContext *	s,
		OGGPage *	page,
		int	extra_flags
	)			[static]

Definition at line 101 of file oggenc.c.

Referenced by ogg_write_pages().

static void ogg_write_pages	(	AVFormatContext *	s,
		int	flush
	)			[static]

Definition at line 465 of file oggenc.c.

Referenced by ogg_write_packet(), and ogg_write_trailer().

static int ogg_write_trailer

(

AVFormatContext *

s

)

[static]

Definition at line 520 of file oggenc.c.

static uint8_t* ogg_write_vorbiscomment	(	int	offset,
		int	bitexact,
		int *	header_len,
		AVDictionary **	m,
		int	framing_bit
	)			[static]

Definition at line 260 of file oggenc.c.

Referenced by ogg_build_flac_headers(), ogg_build_speex_headers(), and ogg_write_header().

---

Variable Documentation

AVOutputFormat ff_ogg_muxer

Initial value:

 {
    .name              = "ogg",
    .long_name         = NULL_IF_CONFIG_SMALL("Ogg"),
    .mime_type         = "application/ogg",
    .extensions        = "ogg,ogv,spx",
    .priv_data_size    = sizeof(OGGContext),
    .audio_codec       = CODEC_ID_FLAC,
    .video_codec       = CODEC_ID_THEORA,
    .write_header      = ogg_write_header,
    .write_packet      = ogg_write_packet,
    .write_trailer     = ogg_write_trailer,
    .priv_class        = &ogg_muxer_class,
}

Definition at line 543 of file oggenc.c.

const AVClass ogg_muxer_class [static]

Initial value:

 {
    .class_name = "Ogg muxer",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 84 of file oggenc.c.

const AVOption options[] [static]

Initial value:

 {
    { "oggpagesize", "Set preferred Ogg page size.",
      0x42, AV_OPT_TYPE_INT, {.dbl = 0}, 0, MAX_PAGE_SIZE, AV_OPT_FLAG_ENCODING_PARAM},
    { "pagesize", "preferred page size in bytes",
        OFFSET(pref_size), AV_OPT_TYPE_INT, { 0 }, 0, MAX_PAGE_SIZE, PARAM },
    { NULL },
}

Definition at line 76 of file oggenc.c.