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_togg_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 (  )     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

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.


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