FFmpeg
Data Structures | Macros | Functions | Variables
sbcenc.c File Reference
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "encode.h"
#include "profiles.h"
#include "put_bits.h"
#include "sbc.h"
#include "sbcdsp.h"

Go to the source code of this file.

Data Structures

struct  SBCEncContext
 

Macros

#define OFFSET(x)   offsetof(SBCEncContext, x)
 
#define AE   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
 

Functions

static int sbc_analyze_audio (SBCDSPContext *s, struct sbc_frame *frame)
 
static size_t sbc_pack_frame (AVPacket *avpkt, struct sbc_frame *frame, int joint, int msbc)
 
static int sbc_encode_init (AVCodecContext *avctx)
 
static int sbc_encode_frame (AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *av_frame, int *got_packet_ptr)
 

Variables

static const AVOption options []
 
static const AVClass sbc_class
 
const FFCodec ff_sbc_encoder
 

Detailed Description

SBC encoder implementation

Definition in file sbcenc.c.

Macro Definition Documentation

◆ OFFSET

#define OFFSET (   x)    offsetof(SBCEncContext, x)

Definition at line 328 of file sbcenc.c.

◆ AE

Definition at line 329 of file sbcenc.c.

Function Documentation

◆ sbc_analyze_audio()

static int sbc_analyze_audio ( SBCDSPContext *  s,
struct sbc_frame frame 
)
static

Definition at line 51 of file sbcenc.c.

Referenced by sbc_encode_frame().

◆ sbc_pack_frame()

static size_t sbc_pack_frame ( AVPacket avpkt,
struct sbc_frame frame,
int  joint,
int  msbc 
)
static

Definition at line 98 of file sbcenc.c.

Referenced by sbc_encode_frame().

◆ sbc_encode_init()

static int sbc_encode_init ( AVCodecContext avctx)
static

Definition at line 196 of file sbcenc.c.

◆ sbc_encode_frame()

static int sbc_encode_frame ( AVCodecContext avctx,
AVPacket avpkt,
const AVFrame av_frame,
int got_packet_ptr 
)
static

Definition at line 278 of file sbcenc.c.

Variable Documentation

◆ options

const AVOption options[]
static
Initial value:
= {
{ "sbc_delay", "set maximum algorithmic latency",
OFFSET(max_delay), AV_OPT_TYPE_DURATION, {.i64 = 13000}, 1000,13000, AE },
{ "msbc", "use mSBC mode (wideband speech mono SBC)",
OFFSET(msbc), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AE },
{ NULL },
}

Definition at line 330 of file sbcenc.c.

◆ sbc_class

const AVClass sbc_class
static
Initial value:
= {
.class_name = "sbc encoder",
.item_name = av_default_item_name,
.option = options,
}

Definition at line 339 of file sbcenc.c.

◆ ff_sbc_encoder

const FFCodec ff_sbc_encoder
Initial value:
= {
.p.name = "sbc",
.p.long_name = NULL_IF_CONFIG_SMALL("SBC (low-complexity subband codec)"),
.p.type = AVMEDIA_TYPE_AUDIO,
.p.id = AV_CODEC_ID_SBC,
.priv_data_size = sizeof(SBCEncContext),
.p.ch_layouts = (const AVChannelLayout[]) { AV_CHANNEL_LAYOUT_MONO,
{ 0 } },
.p.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16,
.p.supported_samplerates = (const int[]) { 16000, 32000, 44100, 48000, 0 },
.p.priv_class = &sbc_class,
}

Definition at line 346 of file sbcenc.c.

OFFSET
#define OFFSET(x)
Definition: sbcenc.c:328
AV_OPT_TYPE_DURATION
@ AV_OPT_TYPE_DURATION
Definition: opt.h:239
AV_CHANNEL_LAYOUT_MONO
#define AV_CHANNEL_LAYOUT_MONO
Definition: channel_layout.h:353
AV_CHANNEL_LAYOUT_STEREO
#define AV_CHANNEL_LAYOUT_STEREO
Definition: channel_layout.h:354
init
static int init
Definition: av_tx.c:47
options
static const AVOption options[]
Definition: sbcenc.c:330
FF_CODEC_ENCODE_CB
#define FF_CODEC_ENCODE_CB(func)
Definition: codec_internal.h:269
AV_CODEC_ID_SBC
@ AV_CODEC_ID_SBC
Definition: codec_id.h:516
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
FF_AVCTX_PROFILE_OPTION
#define FF_AVCTX_PROFILE_OPTION(name, description, type, value)
Definition: profiles.h:25
AE
#define AE
Definition: sbcenc.c:329
SBCEncContext
Definition: sbcenc.c:43
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
NULL
#define NULL
Definition: coverity.c:32
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:237
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:290
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:56
sbc_encode_frame
static int sbc_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *av_frame, int *got_packet_ptr)
Definition: sbcenc.c:278
sbc_encode_init
static int sbc_encode_init(AVCodecContext *avctx)
Definition: sbcenc.c:196
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:55
AV_SAMPLE_FMT_S16
@ AV_SAMPLE_FMT_S16
signed 16 bits
Definition: samplefmt.h:58
ff_sbc_profiles
const AVProfile ff_sbc_profiles[]
Definition: profiles.c:154
sbc_class
static const AVClass sbc_class
Definition: sbcenc.c:339
FF_PROFILE_SBC_MSBC
#define FF_PROFILE_SBC_MSBC
Definition: avcodec.h:1662
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:244
AV_CODEC_CAP_SMALL_LAST_FRAME
#define AV_CODEC_CAP_SMALL_LAST_FRAME
Codec can be fed a final frame with a smaller size.
Definition: codec.h:87