sbcenc.c File Reference

SBC encoder implementation. More...

#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)
#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 av_cold 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 int	sbc_samplerates [] = { 16000, 32000, 44100, 48000, 0 }
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

)

Value:

offsetof(SBCEncContext, x)

Definition at line 330 of file sbcenc.c.

AE

#define AE   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Definition at line 331 of file sbcenc.c.

Function Documentation

sbc_analyze_audio()

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

static

Definition at line 53 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 100 of file sbcenc.c.

Referenced by sbc_encode_frame().

sbc_encode_init()

static av_cold int sbc_encode_init ( AVCodecContext * avctx )

static

Definition at line 194 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 281 of file sbcenc.c.

Variable Documentation

sbc_samplerates

const int sbc_samplerates[] = { 16000, 32000, 44100, 48000, 0 }

static

Definition at line 51 of file sbcenc.c.

Referenced by sbc_encode_init().

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 },
    FF_AVCTX_PROFILE_OPTION("msbc", NULL, AUDIO, AV_PROFILE_SBC_MSBC)
    { NULL },
}

Definition at line 332 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,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 341 of file sbcenc.c.

ff_sbc_encoder

const FFCodec ff_sbc_encoder

Initial value:

= {
    .p.name                = "sbc",
    CODEC_LONG_NAME("SBC (low-complexity subband codec)"),
    .p.type                = AVMEDIA_TYPE_AUDIO,
    .p.id                  = AV_CODEC_ID_SBC,
    .p.capabilities        = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SMALL_LAST_FRAME |
                             AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
    .priv_data_size        = sizeof(SBCEncContext),
    .init                  = sbc_encode_init,
    FF_CODEC_ENCODE_CB(sbc_encode_frame),
    CODEC_CH_LAYOUTS(AV_CHANNEL_LAYOUT_MONO, AV_CHANNEL_LAYOUT_STEREO),
    CODEC_SAMPLEFMTS(AV_SAMPLE_FMT_S16),
    CODEC_SAMPLERATES_ARRAY(sbc_samplerates),
    .p.priv_class          = &sbc_class,
    .p.profiles            = NULL_IF_CONFIG_SMALL(ff_sbc_profiles),
}

Definition at line 348 of file sbcenc.c.