34 #define MAX_PAGE_SIZE 65025
72 #define OFFSET(x) offsetof(OGGContext, x)
73 #define PARAM AV_OPT_FLAG_ENCODING_PARAM
76 {
"pagesize",
"preferred page size in bytes",
139 return (granule>>oggstream->
kfgshift) +
140 (granule & ((1<<oggstream->
kfgshift)-1));
149 int64_t next_granule, cur_granule;
158 return next_granule > cur_granule;
200 int total_segments = size / 255 + 1;
213 for (i = 0; i < total_segments; ) {
224 len =
FFMIN(size, segments*255);
226 memcpy(page->
data+page->
size, p, len);
232 if (i == total_segments)
266 bytestream_put_byte(&p, 1);
289 bytestream_put_byte(&p, 0x7F);
291 bytestream_put_byte(&p, 1);
292 bytestream_put_byte(&p, 0);
293 bytestream_put_be16(&p, 1);
295 bytestream_put_byte(&p, 0x00);
296 bytestream_put_be24(&p, 34);
304 bytestream_put_byte(&p, 0x84);
305 bytestream_put_be24(&p, oggstream->
header_len[1] - 4);
310 #define SPEEX_HEADER_SIZE 80
339 #define OPUS_HEADER_SIZE 19
375 unsigned serial_num = i;
404 for (j = 0; j < i; j++) {
461 bytestream_put_byte(&p, header_type);
485 for (i = 1; i < 3; i++) {
531 if (pframe_count >= (1<<oggstream->
kfgshift)) {
539 granule = pkt->pts + pkt->duration;
547 oggstream->last_granule = granule;
579 .mime_type =
"application/ogg",
580 .extensions =
"ogg,ogv,spx,opus",
587 .priv_class = &ogg_muxer_class,
static int ogg_write_header(AVFormatContext *s)
int64_t last_granule
last packet granule
#define CODEC_FLAG_BITEXACT
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
static int ogg_build_speex_headers(AVCodecContext *avctx, OGGStreamContext *oggstream, int bitexact, AVDictionary **m)
unsigned page_count
number of page buffered
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
uint8_t data[MAX_PAGE_SIZE]
int avpriv_flac_is_extradata_valid(AVCodecContext *avctx, enum FLACExtradataFormat *format, uint8_t **streaminfo_start)
Validate the FLAC extradata.
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
static int ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags)
static int ogg_build_flac_headers(AVCodecContext *avctx, OGGStreamContext *oggstream, int bitexact, AVDictionary **m)
static void ogg_update_checksum(AVFormatContext *s, AVIOContext *pb, int64_t crc_offset)
#define LIBAVFORMAT_IDENT
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
void avio_wl32(AVIOContext *s, unsigned int val)
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
int duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
static const AVOption options[]
static const AVClass ogg_muxer_class
void avio_wl64(AVIOContext *s, uint64_t val)
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
static int ogg_buffer_data(AVFormatContext *s, AVStream *st, uint8_t *data, unsigned size, int64_t granule, int header)
FLAC (Free Lossless Audio Codec) decoder/demuxer common functions.
struct OGGPageList * next
int pref_size
preferred page size (0 => fill all segments)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
void av_log(void *avcl, int level, const char *fmt,...)
static int ogg_reset_cur_page(OGGStreamContext *oggstream)
static int64_t ogg_granule_to_timestamp(OGGStreamContext *oggstream, int64_t granule)
int flags
A combination of AV_PKT_FLAG values.
AVCodecContext * codec
Codec context associated with this stream.
unsigned int nb_streams
A list of all streams in the file.
static int ogg_write_trailer(AVFormatContext *s)
void ffio_init_checksum(AVIOContext *s, unsigned long(*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len), unsigned long checksum)
struct OGGPageList OGGPageList
int void avio_flush(AVIOContext *s)
unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf, unsigned int len)
static int ogg_compare_granule(AVFormatContext *s, OGGPage *next, OGGPage *page)
#define FLAC_STREAMINFO_SIZE
#define SPEEX_HEADER_SIZE
static uint8_t * ogg_write_vorbiscomment(int offset, int bitexact, int *header_len, AVDictionary **m, int framing_bit)
enum AVMediaType codec_type
int sample_rate
samples per second
AVIOContext * pb
I/O context.
void avio_w8(AVIOContext *s, int b)
main external API structure.
static int ogg_buffer_page(AVFormatContext *s, OGGStreamContext *oggstream)
static int ogg_write_packet(AVFormatContext *s, AVPacket *pkt)
Describe the class of an AVClass context structure.
AVOutputFormat ff_ogg_muxer
rational number numerator/denominator
unsigned long ffio_get_checksum(AVIOContext *s)
int avpriv_split_xiph_headers(uint8_t *extradata, int extradata_size, int first_header_size, uint8_t *header_start[3], int header_len[3])
Split a single extradata buffer into the three headers that most Xiph codecs use. ...
unsigned serial_num
serial number
static int ogg_build_opus_headers(AVCodecContext *avctx, OGGStreamContext *oggstream, int bitexact, AVDictionary **m)
static av_cold void flush(AVCodecContext *avctx)
Flush (reset) the frame ID after seeking.
int kfgshift
for theora granule
static av_always_inline void bytestream_put_buffer(uint8_t **b, const uint8_t *src, unsigned int size)
void * priv_data
Format private data.
static void write_header(FFV1Context *f)
void avio_wb32(AVIOContext *s, unsigned int val)
uint32_t av_get_random_seed(void)
Get random data.
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
static void ogg_write_pages(AVFormatContext *s, int flush)
This structure stores compressed data.
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...