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	SPEEX_HEADER_SIZE   80
#define	OPUS_HEADER_SIZE   19

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 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_build_opus_headers (AVCodecContext *avctx, OGGStreamContext *oggstream, int bitexact, AVDictionary **m)
static void	ogg_write_pages (AVFormatContext *s, int flush)
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)

Variables
static const AVOption	options []
static const AVClass	ogg_muxer_class
AVOutputFormat	ff_ogg_muxer

Macro Definition Documentation

#define MAX_PAGE_SIZE   65025

Definition at line 36 of file oggenc.c.

Referenced by ogg_buffer_data().

#define OFFSET

(

x

)

offsetof(OGGContext, x)

Definition at line 76 of file oggenc.c.

#define PARAM   AV_OPT_FLAG_ENCODING_PARAM

Definition at line 77 of file oggenc.c.

#define SPEEX_HEADER_SIZE   80

Definition at line 332 of file oggenc.c.

Referenced by ogg_build_speex_headers().

#define OPUS_HEADER_SIZE   19

Definition at line 361 of file oggenc.c.

Referenced by ogg_build_opus_headers().

Function Documentation

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

static

Definition at line 95 of file oggenc.c.

Referenced by ogg_write_page().

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

static

Definition at line 104 of file oggenc.c.

Referenced by ogg_write_pages().

static int64_t ogg_granule_to_timestamp ( OGGStreamContext *  oggstream, int64_t  granule  )

static

Definition at line 142 of file oggenc.c.

Referenced by ogg_buffer_data(), and ogg_compare_granule().

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

static

Definition at line 151 of file oggenc.c.

Referenced by ogg_buffer_page().

static int ogg_reset_cur_page ( OGGStreamContext *  oggstream )

static

Definition at line 167 of file oggenc.c.

Referenced by ogg_buffer_page().

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

static

Definition at line 176 of file oggenc.c.

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

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

static

Definition at line 201 of file oggenc.c.

Referenced by ogg_write_header(), and ogg_write_packet_internal().

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

static

Definition at line 270 of file oggenc.c.

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

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

static

Definition at line 294 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 334 of file oggenc.c.

Referenced by ogg_write_header().

static int ogg_build_opus_headers ( AVCodecContext *  avctx, OGGStreamContext *  oggstream, int  bitexact, AVDictionary **  m  )

static

Definition at line 363 of file oggenc.c.

Referenced by ogg_write_header().

static void ogg_write_pages ( AVFormatContext *  s, int  flush  )

static

Definition at line 390 of file oggenc.c.

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

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 412 of file oggenc.c.

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

static

Definition at line 547 of file oggenc.c.

Referenced by ogg_write_packet().

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

static

Definition at line 585 of file oggenc.c.

static int ogg_write_trailer ( AVFormatContext *  s )

static

Definition at line 602 of file oggenc.c.

Variable Documentation

const AVOption options[]

static

Initial value:

= {
    { "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 79 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 87 of file oggenc.c.

AVOutputFormat ff_ogg_muxer

Initial value:

= {
    .name              = "ogg",
    .long_name         = NULL_IF_CONFIG_SMALL("Ogg"),
    .mime_type         = "application/ogg",
    .extensions        = "ogg,ogv,spx,opus",
    .priv_data_size    = sizeof(OGGContext),
    .audio_codec       = CONFIG_LIBVORBIS_ENCODER ?
                         AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC,
    .video_codec       = AV_CODEC_ID_THEORA,
    .write_header      = ogg_write_header,
    .write_packet      = ogg_write_packet,
    .write_trailer     = ogg_write_trailer,
    .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
    .priv_class        = &ogg_muxer_class,
}

Definition at line 630 of file oggenc.c.