opus.h File Reference

#include <stdint.h>
#include "libavutil/audio_fifo.h"
#include "libavutil/float_dsp.h"
#include "libavutil/frame.h"
#include "libswresample/swresample.h"
#include "avcodec.h"
#include "opus_rc.h"

Go to the source code of this file.

Data Structures
struct	OpusPacket
struct	OpusStreamContext
struct	ChannelMap
struct	OpusContext

Macros
#define	MAX_FRAME_SIZE   1275
#define	MAX_FRAMES   48
#define	MAX_PACKET_DUR   5760
#define	CELT_SHORT_BLOCKSIZE   120
#define	CELT_OVERLAP   CELT_SHORT_BLOCKSIZE
#define	CELT_MAX_LOG_BLOCKS   3
#define	CELT_MAX_FRAME_SIZE   (CELT_SHORT_BLOCKSIZE * (1 << CELT_MAX_LOG_BLOCKS))
#define	CELT_MAX_BANDS   21
#define	SILK_HISTORY   322
#define	SILK_MAX_LPC   16
#define	ROUND_MULL(a, b, s)   (((MUL64(a, b) >> ((s) - 1)) + 1) >> 1)
#define	ROUND_MUL16(a, b)   ((MUL16(a, b) + 16384) >> 15)
#define	OPUS_TS_HEADER   0x7FE0
#define	OPUS_TS_MASK   0xFFE0

Enumerations
enum	OpusMode { OPUS_MODE_SILK, OPUS_MODE_HYBRID, OPUS_MODE_CELT, OPUS_MODE_NB }
enum	OpusBandwidth {   OPUS_BANDWIDTH_NARROWBAND, OPUS_BANDWIDTH_MEDIUMBAND, OPUS_BANDWIDTH_WIDEBAND, OPUS_BANDWIDTH_SUPERWIDEBAND,   OPUS_BANDWIDTH_FULLBAND, OPUS_BANDWITH_NB }

Functions
int	ff_opus_parse_packet (OpusPacket *pkt, const uint8_t *buf, int buf_size, int self_delimited)
	Parse Opus packet info from raw packet data. More...
int	ff_opus_parse_extradata (AVCodecContext *avctx, OpusContext *s)
int	ff_silk_init (AVCodecContext *avctx, SilkContext **ps, int output_channels)
void	ff_silk_free (SilkContext **ps)
void	ff_silk_flush (SilkContext *s)
int	ff_silk_decode_superframe (SilkContext *s, OpusRangeCoder *rc, float *output[2], enum OpusBandwidth bandwidth, int coded_channels, int duration_ms)
	Decode the LP layer of one Opus frame (which may correspond to several SILK frames). More...

Variables
static const uint8_t	opus_default_extradata [30]

Macro Definition Documentation

#define MAX_FRAME_SIZE   1275

Definition at line 37 of file opus.h.

#define MAX_FRAMES   48

Definition at line 38 of file opus.h.

#define MAX_PACKET_DUR   5760

Definition at line 39 of file opus.h.

Referenced by ff_opus_parse_packet().

#define CELT_SHORT_BLOCKSIZE   120

Definition at line 41 of file opus.h.

Referenced by ff_celt_decode_frame().

#define CELT_OVERLAP   CELT_SHORT_BLOCKSIZE

Definition at line 42 of file opus.h.

Referenced by celt_apply_preemph_filter(), celt_frame_mdct(), celt_postfilter(), celt_postfilter_apply_transition(), ff_celt_decode_frame(), ff_opus_psy_celt_frame_setup(), and ff_opus_psy_process().

#define CELT_MAX_LOG_BLOCKS   3

Definition at line 43 of file opus.h.

Referenced by ff_celt_decode_frame().

#define CELT_MAX_FRAME_SIZE   (CELT_SHORT_BLOCKSIZE * (1 << CELT_MAX_LOG_BLOCKS))

Definition at line 44 of file opus.h.

#define CELT_MAX_BANDS   21

Definition at line 45 of file opus.h.

Referenced by celt_bitalloc(), celt_decode_allocation(), celt_decode_coarse_energy(), celt_encode_frame(), celt_frame_map_norm_bands(), ff_celt_decode_band(), ff_celt_decode_frame(), ff_celt_encode_band(), ff_celt_flush(), ff_opus_psy_celt_frame_setup(), and opus_encode_init().

#define SILK_HISTORY   322

Definition at line 47 of file opus.h.

Referenced by ff_silk_decode_superframe(), silk_decode_frame(), and silk_unmix_ms().

#define SILK_MAX_LPC   16

Definition at line 48 of file opus.h.

#define ROUND_MULL	(		a,
			b,
			s
	)		(((MUL64(a, b) >> ((s) - 1)) + 1) >> 1)

Definition at line 50 of file opus.h.

Referenced by silk_is_lpc_stable(), silk_lsf2lpc(), and silk_lsp2poly().

#define ROUND_MUL16	(		a,
			b
	)		((MUL16(a, b) + 16384) >> 15)

Definition at line 51 of file opus.h.

Referenced by celt_cos(), celt_log2tan(), ff_celt_decode_band(), and ff_celt_encode_band().

#define OPUS_TS_HEADER   0x7FE0

Definition at line 53 of file opus.h.

Referenced by opus_find_frame_end().

#define OPUS_TS_MASK   0xFFE0

Definition at line 54 of file opus.h.

Referenced by opus_find_frame_end().

Enumeration Type Documentation

enum OpusMode

Enumerator
OPUS_MODE_SILK
OPUS_MODE_HYBRID
OPUS_MODE_CELT
OPUS_MODE_NB

Definition at line 62 of file opus.h.

enum OpusBandwidth

Enumerator
OPUS_BANDWIDTH_NARROWBAND
OPUS_BANDWIDTH_MEDIUMBAND
OPUS_BANDWIDTH_WIDEBAND
OPUS_BANDWIDTH_SUPERWIDEBAND
OPUS_BANDWIDTH_FULLBAND
OPUS_BANDWITH_NB

Definition at line 70 of file opus.h.

Function Documentation

int ff_opus_parse_packet	(	OpusPacket *	pkt,
		const uint8_t *	buf,
		int	buf_size,
		int	self_delimited
	)

Parse Opus packet info from raw packet data.

Definition at line 89 of file opus.c.

Referenced by opus_decode_packet(), and opus_find_frame_end().

int ff_opus_parse_extradata	(	AVCodecContext *	avctx,
		OpusContext *	s
	)

Definition at line 290 of file opus.c.

Referenced by opus_decode_init(), and opus_find_frame_end().

int ff_silk_init	(	AVCodecContext *	avctx,
		SilkContext **	ps,
		int	output_channels
	)

Definition at line 851 of file opus_silk.c.

Referenced by opus_decode_init().

void ff_silk_free

(

SilkContext **

ps

)

Definition at line 838 of file opus_silk.c.

Referenced by opus_decode_close().

void ff_silk_flush

(

SilkContext *

s

)

Definition at line 843 of file opus_silk.c.

Referenced by ff_silk_init(), opus_decode_flush(), and opus_decode_frame().

int ff_silk_decode_superframe	(	SilkContext *	s,
		OpusRangeCoder *	rc,
		float *	output[2],
		enum OpusBandwidth	bandwidth,
		int	coded_channels,
		int	duration_ms
	)

Decode the LP layer of one Opus frame (which may correspond to several SILK frames).

Definition at line 774 of file opus_silk.c.

Referenced by opus_decode_frame().

Variable Documentation

const uint8_t opus_default_extradata[30]

static

Initial value:

= {
    'O', 'p', 'u', 's', 'H', 'e', 'a', 'd',
    1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
}

Definition at line 56 of file opus.h.

Referenced by ff_opus_parse_extradata(), and ff_parse_mpeg2_descriptor().