opusdec.c File Reference

Opus decoder. More...

#include <stdint.h>
#include "libavutil/attributes.h"
#include "libavutil/audio_fifo.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "libswresample/swresample.h"
#include "avcodec.h"
#include "celp_filters.h"
#include "fft.h"
#include "get_bits.h"
#include "internal.h"
#include "mathops.h"
#include "opus.h"

Go to the source code of this file.

Functions
static int	get_silk_samplerate (int config)
static int	opus_rc_init (OpusRangeCoder *rc, const uint8_t *data, int size)
	Range decoder.
static void	opus_raw_init (OpusRangeCoder *rc, const uint8_t *rightend, unsigned int bytes)
static void	opus_fade (float *out, const float *in1, const float *in2, const float *window, int len)
static int	opus_flush_resample (OpusStreamContext *s, int nb_samples)
static int	opus_init_resample (OpusStreamContext *s)
static int	opus_decode_redundancy (OpusStreamContext *s, const uint8_t *data, int size)
static int	opus_decode_frame (OpusStreamContext *s, const uint8_t *data, int size)
static int	opus_decode_subpacket (OpusStreamContext *s, const uint8_t *buf, int buf_size, int nb_samples)
static int	opus_decode_packet (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
static av_cold void	opus_decode_flush (AVCodecContext *ctx)
static av_cold int	opus_decode_close (AVCodecContext *avctx)
static av_cold int	opus_decode_init (AVCodecContext *avctx)

Variables
static const uint16_t	silk_frame_duration_ms [16]
static const int	silk_resample_delay []
static const uint8_t	celt_band_end [] = { 13, 17, 17, 19, 21 }
AVCodec	ff_opus_decoder

Detailed Description

Opus decoder.

Author

Andrew D'Addesio, Anton Khirnov

Codec homepage: http://opus-codec.org/ Specification: http://tools.ietf.org/html/rfc6716 Ogg Opus specification: https://tools.ietf.org/html/draft-ietf-codec-oggopus-03

Ogg-contained .opus files can be produced with opus-tools: http://git.xiph.org/?p=opus-tools.git

Definition in file opusdec.c.

Function Documentation

static int get_silk_samplerate ( int  config )

static

Definition at line 69 of file opusdec.c.

Referenced by opus_decode_packet().

static int opus_rc_init ( OpusRangeCoder *  rc, const uint8_t *  data, int  size  )

static

Range decoder.

Definition at line 81 of file opusdec.c.

Referenced by opus_decode_frame(), and opus_decode_redundancy().

static void opus_raw_init ( OpusRangeCoder *  rc, const uint8_t *  rightend, unsigned int  bytes  )

static

Definition at line 95 of file opusdec.c.

Referenced by opus_decode_frame(), and opus_decode_redundancy().

static void opus_fade ( float *  out, const float *  in1, const float *  in2, const float *  window, int  len  )

static

Definition at line 104 of file opusdec.c.

Referenced by opus_decode_frame(), and opus_flush_resample().

static int opus_flush_resample ( OpusStreamContext *  s, int  nb_samples  )

static

Definition at line 113 of file opusdec.c.

Referenced by opus_decode_subpacket().

static int opus_init_resample ( OpusStreamContext *  s )

static

Definition at line 156 of file opusdec.c.

Referenced by opus_decode_frame().

static int opus_decode_redundancy ( OpusStreamContext *  s, const uint8_t *  data, int  size  )

static

Definition at line 181 of file opusdec.c.

Referenced by opus_decode_frame().

static int opus_decode_frame ( OpusStreamContext *  s, const uint8_t *  data, int  size  )

static

Definition at line 208 of file opusdec.c.

Referenced by opus_decode_subpacket().

static int opus_decode_subpacket ( OpusStreamContext *  s, const uint8_t *  buf, int  buf_size, int  nb_samples  )

static

Definition at line 367 of file opusdec.c.

Referenced by opus_decode_packet().

static int opus_decode_packet ( AVCodecContext *  avctx, void *  data, int *  got_frame_ptr, AVPacket *  avpkt  )

static

Definition at line 444 of file opusdec.c.

static av_cold void opus_decode_flush ( AVCodecContext *  ctx )

static

Definition at line 544 of file opusdec.c.

static av_cold int opus_decode_close ( AVCodecContext *  avctx )

static

Definition at line 564 of file opusdec.c.

Referenced by opus_decode_init().

static av_cold int opus_decode_init ( AVCodecContext *  avctx )

static

Definition at line 590 of file opusdec.c.

Variable Documentation

const uint16_t silk_frame_duration_ms[16]

static

Initial value:

= {
    10, 20, 40, 60,
    10, 20, 40, 60,
    10, 20, 40, 60,
    10, 20,
    10, 20,
}

Definition at line 53 of file opusdec.c.

Referenced by opus_decode_frame().

const int silk_resample_delay[]

static

Initial value:

= {
    4, 8, 11, 11, 11
}

Definition at line 63 of file opusdec.c.

Referenced by opus_init_resample().

const uint8_t celt_band_end[] = { 13, 17, 17, 19, 21 }

static

Definition at line 67 of file opusdec.c.

Referenced by opus_decode_frame(), and opus_decode_redundancy().

AVCodec ff_opus_decoder

Initial value:

= {
    .name            = "opus",
    .long_name       = NULL_IF_CONFIG_SMALL("Opus"),
    .type            = AVMEDIA_TYPE_AUDIO,
    .id              = AV_CODEC_ID_OPUS,
    .priv_data_size  = sizeof(OpusContext),
    .init            = opus_decode_init,
    .close           = opus_decode_close,
    .decode          = opus_decode_packet,
    .flush           = opus_decode_flush,
    .capabilities    = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
}

Definition at line 663 of file opusdec.c.