oggenc.c File Reference

#include <stdint.h>
#include "libavutil/crc.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.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

Macros
#define	MAX_PAGE_SIZE   65025
#define	OFFSET(x)   offsetof(OGGContext, x)
#define	PARAM   AV_OPT_FLAG_ENCODING_PARAM
#define	OGG_CLASS(flavor, name)
#define	SPEEX_HEADER_SIZE   80
#define	OPUS_HEADER_SIZE   19
#define	VP8_HEADER_SIZE   26

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 (int64_t offset, int bitexact, int *header_len, AVDictionary **m, int framing_bit)
static int	ogg_build_flac_headers (AVCodecParameters *par, OGGStreamContext *oggstream, int bitexact, AVDictionary **m)
static int	ogg_build_speex_headers (AVCodecParameters *par, OGGStreamContext *oggstream, int bitexact, AVDictionary **m)
static int	ogg_build_opus_headers (AVCodecParameters *par, OGGStreamContext *oggstream, int bitexact, AVDictionary **m)
static int	ogg_build_vp8_headers (AVFormatContext *s, AVStream *st, OGGStreamContext *oggstream, int bitexact)
static void	ogg_write_pages (AVFormatContext *s, int flush)
static int	ogg_init (AVFormatContext *s)
static int	ogg_write_header (AVFormatContext *s)
static int	ogg_write_packet_internal (AVFormatContext *s, AVPacket *pkt)
static int	ogg_write_packet (AVFormatContext *s, AVPacket *pkt)
static int	ogg_write_trailer (AVFormatContext *s)
static void	ogg_free (AVFormatContext *s)

Variables
static const AVOption	options []

Macro Definition Documentation

MAX_PAGE_SIZE

#define MAX_PAGE_SIZE   65025

Definition at line 36 of file oggenc.c.

Referenced by ogg_buffer_data().

OFFSET

#define OFFSET

(

x

)

offsetof(OGGContext, x)

Definition at line 79 of file oggenc.c.

PARAM

#define PARAM   AV_OPT_FLAG_ENCODING_PARAM

Definition at line 80 of file oggenc.c.

OGG_CLASS

#define OGG_CLASS	(		flavor,
			name
	)

Value:

static const AVClass flavor ## _muxer_class = {\
    .class_name = #name " muxer",\
    .item_name  = av_default_item_name,\
    .option     = options,\
    .version    = LIBAVUTIL_VERSION_INT,\
};

Definition at line 94 of file oggenc.c.

Referenced by ogg_free().

SPEEX_HEADER_SIZE

#define SPEEX_HEADER_SIZE   80

Definition at line 355 of file oggenc.c.

Referenced by ogg_build_speex_headers().

OPUS_HEADER_SIZE

#define OPUS_HEADER_SIZE   19

Definition at line 384 of file oggenc.c.

Referenced by ogg_build_opus_headers().

VP8_HEADER_SIZE

#define VP8_HEADER_SIZE   26

Definition at line 413 of file oggenc.c.

Referenced by ogg_build_vp8_headers().

Function Documentation

ogg_update_checksum()

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

static

Definition at line 102 of file oggenc.c.

Referenced by ogg_write_page().

ogg_write_page()

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

static

Definition at line 111 of file oggenc.c.

Referenced by ogg_write_pages().

ogg_key_granule()

static int ogg_key_granule ( OGGStreamContext *  oggstream, int64_t  granule  )

static

Definition at line 149 of file oggenc.c.

Referenced by ogg_buffer_data().

ogg_granule_to_timestamp()

static int64_t ogg_granule_to_timestamp ( OGGStreamContext *  oggstream, int64_t  granule  )

static

Definition at line 155 of file oggenc.c.

Referenced by ogg_buffer_data(), ogg_buffer_page(), and ogg_compare_granule().

ogg_compare_granule()

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

static

Definition at line 166 of file oggenc.c.

Referenced by ogg_buffer_page().

ogg_reset_cur_page()

static int ogg_reset_cur_page ( OGGStreamContext *  oggstream )

static

Definition at line 182 of file oggenc.c.

Referenced by ogg_buffer_page().

ogg_buffer_page()

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

static

Definition at line 191 of file oggenc.c.

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

ogg_buffer_data()

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

static

Definition at line 216 of file oggenc.c.

Referenced by ogg_write_header(), and ogg_write_packet_internal().

ogg_write_vorbiscomment()

static uint8_t* ogg_write_vorbiscomment ( int64_t  offset, int  bitexact, int *  header_len, AVDictionary **  m, int  framing_bit  )

static

Definition at line 293 of file oggenc.c.

Referenced by ogg_build_flac_headers(), ogg_build_opus_headers(), ogg_build_speex_headers(), ogg_build_vp8_headers(), and ogg_init().

ogg_build_flac_headers()

static int ogg_build_flac_headers ( AVCodecParameters *  par, OGGStreamContext *  oggstream, int  bitexact, AVDictionary **  m  )

static

Definition at line 319 of file oggenc.c.

Referenced by ogg_init().

ogg_build_speex_headers()

static int ogg_build_speex_headers ( AVCodecParameters *  par, OGGStreamContext *  oggstream, int  bitexact, AVDictionary **  m  )

static

Definition at line 357 of file oggenc.c.

Referenced by ogg_init().

ogg_build_opus_headers()

static int ogg_build_opus_headers ( AVCodecParameters *  par, OGGStreamContext *  oggstream, int  bitexact, AVDictionary **  m  )

static

Definition at line 386 of file oggenc.c.

Referenced by ogg_init().

ogg_build_vp8_headers()

static int ogg_build_vp8_headers ( AVFormatContext *  s, AVStream *  st, OGGStreamContext *  oggstream, int  bitexact  )

static

Definition at line 415 of file oggenc.c.

Referenced by ogg_init().

ogg_write_pages()

static void ogg_write_pages ( AVFormatContext *  s, int  flush  )

static

Definition at line 464 of file oggenc.c.

Referenced by ogg_write_header(), ogg_write_packet(), ogg_write_packet_internal(), and ogg_write_trailer().

ogg_init()

static int ogg_init ( 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 486 of file oggenc.c.

Referenced by ogg_free().

ogg_write_header()

static int ogg_write_header ( AVFormatContext *  s )

static

Definition at line 623 of file oggenc.c.

Referenced by ogg_free().

ogg_write_packet_internal()

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

static

Definition at line 653 of file oggenc.c.

Referenced by ogg_write_packet().

ogg_write_packet()

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

static

Definition at line 705 of file oggenc.c.

Referenced by ogg_free().

ogg_write_trailer()

static int ogg_write_trailer ( AVFormatContext *  s )

static

Definition at line 722 of file oggenc.c.

Referenced by ogg_free().

ogg_free()

static void ogg_free ( AVFormatContext *  s )

static

Definition at line 739 of file oggenc.c.

Variable Documentation

options

const AVOption options[]

static

Initial value:

= {
    { "serial_offset", "serial number offset",
        OFFSET(serial_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, PARAM },
    { "oggpagesize", "Set preferred Ogg page size.",
      OFFSET(pref_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, MAX_PAGE_SIZE, PARAM},
    { "pagesize", "preferred page size in bytes (deprecated)",
        OFFSET(pref_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, MAX_PAGE_SIZE, PARAM },
    { "page_duration", "preferred page duration, in microseconds",
        OFFSET(pref_duration), AV_OPT_TYPE_INT64, { .i64 = 1000000 }, 0, INT64_MAX, PARAM },
    { NULL },
}

Definition at line 82 of file oggenc.c.