Opus audio codec (RFC 6716): API and operations manual
1.1.2

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Typedefs | Functions
opus.h File Reference

Opus reference implementation API. More...

`#include "opus_types.h"`
`#include "opus_defines.h"`

Go to the source code of this file.

## Typedefs

typedef struct OpusEncoder | OpusEncoder
| Opus encoder state. More...
typedef struct OpusDecoder | OpusDecoder
| Opus decoder state. More...
typedef struct OpusRepacketizer | OpusRepacketizer

## Functions

int | opus_encoder_get_size (int channels)
| Gets the size of an `OpusEncoder` structure. More...
OpusEncoder * | opus_encoder_create (opus_int32 Fs, int channels, int application, int *error)
| Allocates and initializes an encoder state. More...
int | opus_encoder_init (OpusEncoder *st, opus_int32 Fs, int channels, int application)
| Initializes a previously allocated encoder state The memory pointed to by st must be at least the size returned by opus_encoder_get_size(). More...
opus_int32 | opus_encode (OpusEncoder *st, const opus_int16 *pcm, int frame_size, unsigned char *data, opus_int32 max_data_bytes)
| Encodes an Opus frame. More...
opus_int32 | opus_encode_float (OpusEncoder *st, const float *pcm, int frame_size, unsigned char *data, opus_int32 max_data_bytes)
| Encodes an Opus frame from floating point input. More...
void | opus_encoder_destroy (OpusEncoder *st)
| Frees an `OpusEncoder` allocated by opus_encoder_create(). More...
int | opus_encoder_ctl (OpusEncoder *st, int request,...)
| Perform a CTL function on an Opus encoder. More...
int | opus_decoder_get_size (int channels)
| Gets the size of an `OpusDecoder` structure. More...
OpusDecoder * | opus_decoder_create (opus_int32 Fs, int channels, int *error)
| Allocates and initializes a decoder state. More...
int | opus_decoder_init (OpusDecoder *st, opus_int32 Fs, int channels)
| Initializes a previously allocated decoder state. More...
int | opus_decode (OpusDecoder *st, const unsigned char *data, opus_int32 len, opus_int16 *pcm, int frame_size, int decode_fec)
| Decode an Opus packet. More...
int | opus_decode_float (OpusDecoder *st, const unsigned char *data, opus_int32 len, float *pcm, int frame_size, int decode_fec)
| Decode an Opus packet with floating point output. More...
int | opus_decoder_ctl (OpusDecoder *st, int request,...)
| Perform a CTL function on an Opus decoder. More...
void | opus_decoder_destroy (OpusDecoder *st)
| Frees an `OpusDecoder` allocated by opus_decoder_create(). More...
int | opus_packet_parse (const unsigned char *data, opus_int32 len, unsigned char *out_toc, const unsigned char *frames[48], opus_int16 size[48], int *payload_offset)
| Parse an opus packet into one or more frames. More...
int | opus_packet_get_bandwidth (const unsigned char *data)
| Gets the bandwidth of an Opus packet. More...
int | opus_packet_get_samples_per_frame (const unsigned char *data, opus_int32 Fs)
| Gets the number of samples per frame from an Opus packet. More...
int | opus_packet_get_nb_channels (const unsigned char *data)
| Gets the number of channels from an Opus packet. More...
int | opus_packet_get_nb_frames (const unsigned char packet[], opus_int32 len)
| Gets the number of frames in an Opus packet. More...
int | opus_packet_get_nb_samples (const unsigned char packet[], opus_int32 len, opus_int32 Fs)
| Gets the number of samples of an Opus packet. More...
int | opus_decoder_get_nb_samples (const OpusDecoder *dec, const unsigned char packet[], opus_int32 len)
| Gets the number of samples of an Opus packet. More...
void | opus_pcm_soft_clip (float *pcm, int frame_size, int channels, float *softclip_mem)
| Applies soft-clipping to bring a float signal within the [-1,1] range. More...
int | opus_repacketizer_get_size (void)
| Gets the size of an `OpusRepacketizer` structure. More...
OpusRepacketizer * | opus_repacketizer_init (OpusRepacketizer *rp)
| (Re)initializes a previously allocated repacketizer state. More...
OpusRepacketizer * | opus_repacketizer_create (void)
| Allocates memory and initializes the new repacketizer with opus_repacketizer_init(). More...
void | opus_repacketizer_destroy (OpusRepacketizer *rp)
| Frees an `OpusRepacketizer` allocated by opus_repacketizer_create(). More...
int | opus_repacketizer_cat (OpusRepacketizer *rp, const unsigned char *data, opus_int32 len)
| Add a packet to the current repacketizer state. More...
opus_int32 | opus_repacketizer_out_range (OpusRepacketizer *rp, int begin, int end, unsigned char *data, opus_int32 maxlen)
| Construct a new packet from data previously submitted to the repacketizer state via opus_repacketizer_cat(). More...
int | opus_repacketizer_get_nb_frames (OpusRepacketizer *rp)
| Return the total number of frames contained in packet data submitted to the repacketizer state so far via opus_repacketizer_cat() since the last call to opus_repacketizer_init() or opus_repacketizer_create(). More...
opus_int32 | opus_repacketizer_out (OpusRepacketizer *rp, unsigned char *data, opus_int32 maxlen)
| Construct a new packet from data previously submitted to the repacketizer state via opus_repacketizer_cat(). More...
int | opus_packet_pad (unsigned char *data, opus_int32 len, opus_int32 new_len)
| Pads a given Opus packet to a larger size (possibly changing the TOC sequence). More...
opus_int32 | opus_packet_unpad (unsigned char *data, opus_int32 len)
| Remove all padding from a given Opus packet and rewrite the TOC sequence to minimize space usage. More...
int | opus_multistream_packet_pad (unsigned char *data, opus_int32 len, opus_int32 new_len, int nb_streams)
| Pads a given Opus multi-stream packet to a larger size (possibly changing the TOC sequence). More...
opus_int32 | opus_multistream_packet_unpad (unsigned char *data, opus_int32 len, int nb_streams)
| Remove all padding from a given Opus multi-stream packet and rewrite the TOC sequence to minimize space usage. More...

## Detailed Description

Opus reference implementation API.

For more information visit the Opus Website. |