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

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...

void	ff_celt_quant_bands (CeltFrame f, OpusRangeCoder rc)

void	ff_celt_bitalloc (CeltFrame f, OpusRangeCoder rc, int encode)

Variables
static const uint8_t	opus_default_extradata [30]

Macro Definition Documentation

◆ MAX_FRAME_SIZE

#define MAX_FRAME_SIZE 1275

Definition at line 38 of file opus.h.

◆ MAX_FRAMES

#define MAX_FRAMES 48

Definition at line 39 of file opus.h.

◆ MAX_PACKET_DUR

#define MAX_PACKET_DUR 5760

Definition at line 40 of file opus.h.

◆ CELT_SHORT_BLOCKSIZE

#define CELT_SHORT_BLOCKSIZE 120

Definition at line 42 of file opus.h.

◆ CELT_OVERLAP

#define CELT_OVERLAP CELT_SHORT_BLOCKSIZE

Definition at line 43 of file opus.h.

◆ CELT_MAX_LOG_BLOCKS

#define CELT_MAX_LOG_BLOCKS 3

Definition at line 44 of file opus.h.

◆ CELT_MAX_FRAME_SIZE

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

Definition at line 45 of file opus.h.

◆ CELT_MAX_BANDS

#define CELT_MAX_BANDS 21

Definition at line 46 of file opus.h.

◆ SILK_HISTORY

#define SILK_HISTORY 322

Definition at line 48 of file opus.h.

◆ SILK_MAX_LPC

#define SILK_MAX_LPC 16

Definition at line 49 of file opus.h.

◆ ROUND_MULL

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

Definition at line 51 of file opus.h.

◆ ROUND_MUL16

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

Definition at line 52 of file opus.h.

◆ OPUS_TS_HEADER

#define OPUS_TS_HEADER 0x7FE0

Definition at line 54 of file opus.h.

◆ OPUS_TS_MASK

#define OPUS_TS_MASK 0xFFE0

Definition at line 55 of file opus.h.

Enumeration Type Documentation

◆ OpusMode

enum OpusMode

Enumerator
OPUS_MODE_SILK
OPUS_MODE_HYBRID
OPUS_MODE_CELT
OPUS_MODE_NB

Definition at line 63 of file opus.h.

◆ OpusBandwidth

enum OpusBandwidth

Enumerator
OPUS_BANDWIDTH_NARROWBAND
OPUS_BANDWIDTH_MEDIUMBAND
OPUS_BANDWIDTH_WIDEBAND
OPUS_BANDWIDTH_SUPERWIDEBAND
OPUS_BANDWIDTH_FULLBAND
OPUS_BANDWITH_NB

Definition at line 71 of file opus.h.

Function Documentation

◆ ff_opus_parse_packet()

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 92 of file opus.c.

Referenced by opus_decode_packet(), and opus_find_frame_end().

◆ ff_opus_parse_extradata()

int ff_opus_parse_extradata	(	AVCodecContext *	avctx,
		OpusContext *	s
	)

Definition at line 293 of file opus.c.

Referenced by opus_decode_init(), and opus_find_frame_end().

◆ ff_silk_init()

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

Definition at line 875 of file opus_silk.c.

Referenced by opus_decode_init().

◆ ff_silk_free()

void ff_silk_free ( SilkContext ** ps )

Definition at line 862 of file opus_silk.c.

Referenced by opus_decode_close().

◆ ff_silk_flush()

void ff_silk_flush ( SilkContext * s )

Definition at line 867 of file opus_silk.c.

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

◆ ff_silk_decode_superframe()

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 786 of file opus_silk.c.

Referenced by opus_decode_frame().

◆ ff_celt_quant_bands()

void ff_celt_quant_bands	(	CeltFrame *	f,
		OpusRangeCoder *	rc
	)

Definition at line 469 of file opus.c.

Referenced by celt_encode_frame(), and ff_celt_decode_frame().

◆ ff_celt_bitalloc()

void ff_celt_bitalloc	(	CeltFrame *	f,
		OpusRangeCoder *	rc,
		int	encode
	)

Definition at line 578 of file opus.c.

Referenced by bands_dist(), celt_encode_frame(), and ff_celt_decode_frame().

Variable Documentation

◆ opus_default_extradata

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 57 of file opus.h.

Referenced by ff_opus_parse_extradata(), and ff_parse_mpeg2_descriptor().

Data Structures

Macros

Enumerations

Functions

Variables