FFmpeg
Data Structures | Macros | Functions | Variables
libtwolame.c File Reference
#include <twolame.h>
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "internal.h"
#include "mpegaudio.h"

Go to the source code of this file.

Data Structures

struct  TWOLAMEContext
 

Macros

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

Functions

static av_cold int twolame_encode_close (AVCodecContext *avctx)
 
static av_cold int twolame_encode_init (AVCodecContext *avctx)
 
static int twolame_encode_frame (AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
 

Variables

static const AVOption options []
 
static const AVClass twolame_class
 
static const AVCodecDefault twolame_defaults []
 
static const int twolame_samplerates []
 
const AVCodec ff_libtwolame_encoder
 

Detailed Description

Interface to libtwolame for mp2 encoding.

Definition in file libtwolame.c.

Macro Definition Documentation

◆ OFFSET

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

Definition at line 175 of file libtwolame.c.

◆ AE

Definition at line 176 of file libtwolame.c.

Function Documentation

◆ twolame_encode_close()

static av_cold int twolame_encode_close ( AVCodecContext avctx)
static

Definition at line 50 of file libtwolame.c.

Referenced by twolame_encode_init().

◆ twolame_encode_init()

static av_cold int twolame_encode_init ( AVCodecContext avctx)
static

Definition at line 57 of file libtwolame.c.

◆ twolame_encode_frame()

static int twolame_encode_frame ( AVCodecContext avctx,
AVPacket avpkt,
const AVFrame frame,
int got_packet_ptr 
)
static

Definition at line 107 of file libtwolame.c.

Variable Documentation

◆ options

const AVOption options[]
static
Initial value:
= {
{ "mode", "Mpeg Mode", OFFSET(mode), AV_OPT_TYPE_INT, { .i64 = TWOLAME_AUTO_MODE }, TWOLAME_AUTO_MODE, TWOLAME_MONO, AE, "mode"},
{ "auto", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TWOLAME_AUTO_MODE }, 0, 0, AE, "mode" },
{ "stereo", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TWOLAME_STEREO }, 0, 0, AE, "mode" },
{ "joint_stereo", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TWOLAME_JOINT_STEREO }, 0, 0, AE, "mode" },
{ "dual_channel", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TWOLAME_DUAL_CHANNEL }, 0, 0, AE, "mode" },
{ "mono", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TWOLAME_MONO }, 0, 0, AE, "mode" },
{ "psymodel", "Psychoacoustic Model", OFFSET(psymodel), AV_OPT_TYPE_INT, { .i64 = 3 }, -1, 4, AE},
{ "energy_levels","enable energy levels", OFFSET(energy), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AE},
{ "error_protection","enable CRC error protection", OFFSET(error_protection), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AE},
{ "copyright", "set MPEG Audio Copyright flag", OFFSET(copyright), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AE},
{ "original", "set MPEG Audio Original flag", OFFSET(original), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AE},
{ "verbosity", "set library optput level (0-10)", OFFSET(verbosity), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 10, AE},
{ NULL },
}

Definition at line 177 of file libtwolame.c.

◆ twolame_class

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

Definition at line 193 of file libtwolame.c.

◆ twolame_defaults

const AVCodecDefault twolame_defaults[]
static
Initial value:
= {
{ "b", "0" },
{ NULL },
}

Definition at line 200 of file libtwolame.c.

◆ twolame_samplerates

const int twolame_samplerates[]
static
Initial value:
= {
16000, 22050, 24000, 32000, 44100, 48000, 0
}

Definition at line 205 of file libtwolame.c.

◆ ff_libtwolame_encoder

const AVCodec ff_libtwolame_encoder
Initial value:
= {
.name = "libtwolame",
.long_name = NULL_IF_CONFIG_SMALL("libtwolame MP2 (MPEG audio layer 2)"),
.priv_data_size = sizeof(TWOLAMEContext),
.capabilities = AV_CODEC_CAP_DELAY,
.priv_class = &twolame_class,
.sample_fmts = (const enum AVSampleFormat[]) {
},
.channel_layouts = (const uint64_t[]) {
0 },
.supported_samplerates = twolame_samplerates,
.wrapper_name = "libtwolame",
}

Definition at line 209 of file libtwolame.c.

AV_SAMPLE_FMT_FLTP
@ AV_SAMPLE_FMT_FLTP
float, planar
Definition: samplefmt.h:69
twolame_encode_close
static av_cold int twolame_encode_close(AVCodecContext *avctx)
Definition: libtwolame.c:50
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:953
AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_MONO
Definition: channel_layout.h:90
defaults
static const AVCodecDefault defaults[]
Definition: amfenc_h264.c:361
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:91
twolame_encode_init
static av_cold int twolame_encode_init(AVCodecContext *avctx)
Definition: libtwolame.c:57
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_CODEC_ID_MP2
@ AV_CODEC_ID_MP2
Definition: codec_id.h:421
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:235
twolame_encode_frame
static int twolame_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Definition: libtwolame.c:107
twolame_class
static const AVClass twolame_class
Definition: libtwolame.c:193
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
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
options
static const AVOption options[]
Definition: libtwolame.c:177
AV_SAMPLE_FMT_S16P
@ AV_SAMPLE_FMT_S16P
signed 16 bits, planar
Definition: samplefmt.h:67
twolame_defaults
static const AVCodecDefault twolame_defaults[]
Definition: libtwolame.c:200
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
AV_SAMPLE_FMT_S16
@ AV_SAMPLE_FMT_S16
signed 16 bits
Definition: samplefmt.h:61
TWOLAMEContext
Definition: libtwolame.c:36
OFFSET
#define OFFSET(x)
Definition: libtwolame.c:175
AE
#define AE
Definition: libtwolame.c:176
twolame_samplerates
static const int twolame_samplerates[]
Definition: libtwolame.c:205
mode
mode
Definition: ebur128.h:83
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
AV_CODEC_CAP_DELAY
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: codec.h:77
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
AV_SAMPLE_FMT_FLT
@ AV_SAMPLE_FMT_FLT
float
Definition: samplefmt.h:63