FFmpeg
Data Structures | Macros | Functions | Variables
libtwolame.c File Reference
#include <twolame.h>
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "encode.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 FFCodecDefault twolame_defaults []
 
static const int twolame_samplerates []
 
const FFCodec 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 177 of file libtwolame.c.

◆ AE

Definition at line 178 of file libtwolame.c.

Function Documentation

◆ twolame_encode_close()

static av_cold int twolame_encode_close ( AVCodecContext avctx)
static

Definition at line 52 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 59 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 109 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, .unit = "mode"},
{ "auto", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TWOLAME_AUTO_MODE }, 0, 0, AE, .unit = "mode" },
{ "stereo", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TWOLAME_STEREO }, 0, 0, AE, .unit = "mode" },
{ "joint_stereo", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TWOLAME_JOINT_STEREO }, 0, 0, AE, .unit = "mode" },
{ "dual_channel", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TWOLAME_DUAL_CHANNEL }, 0, 0, AE, .unit = "mode" },
{ "mono", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TWOLAME_MONO }, 0, 0, AE, .unit = "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 179 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 195 of file libtwolame.c.

◆ twolame_defaults

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

Definition at line 202 of file libtwolame.c.

◆ twolame_samplerates

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

Definition at line 207 of file libtwolame.c.

◆ ff_libtwolame_encoder

const FFCodec ff_libtwolame_encoder
Initial value:
= {
.p.name = "libtwolame",
CODEC_LONG_NAME("libtwolame MP2 (MPEG audio layer 2)"),
.p.type = AVMEDIA_TYPE_AUDIO,
.p.id = AV_CODEC_ID_MP2,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
.priv_data_size = sizeof(TWOLAMEContext),
.defaults = twolame_defaults,
.p.priv_class = &twolame_class,
.p.sample_fmts = (const enum AVSampleFormat[]) {
},
.p.ch_layouts = (const AVChannelLayout[]) {
{ 0 },
},
.p.supported_samplerates = twolame_samplerates,
.p.wrapper_name = "libtwolame",
}

Definition at line 211 of file libtwolame.c.

AV_SAMPLE_FMT_FLTP
@ AV_SAMPLE_FMT_FLTP
float, planar
Definition: samplefmt.h:66
twolame_encode_close
static av_cold int twolame_encode_close(AVCodecContext *avctx)
Definition: libtwolame.c:52
AV_CHANNEL_LAYOUT_STEREO
#define AV_CHANNEL_LAYOUT_STEREO
Definition: channel_layout.h:393
mode
Definition: swscale.c:52
FF_CODEC_CAP_NOT_INIT_THREADSAFE
#define FF_CODEC_CAP_NOT_INIT_THREADSAFE
The codec is not known to be init-threadsafe (i.e.
Definition: codec_internal.h:35
FF_CODEC_ENCODE_CB
#define FF_CODEC_ENCODE_CB(func)
Definition: codec_internal.h:320
twolame_encode_init
static av_cold int twolame_encode_init(AVCodecContext *avctx)
Definition: libtwolame.c:59
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_CODEC_ID_MP2
@ AV_CODEC_ID_MP2
Definition: codec_id.h:446
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:296
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
twolame_encode_frame
static int twolame_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Definition: libtwolame.c:109
twolame_class
static const AVClass twolame_class
Definition: libtwolame.c:195
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts.c:368
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
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:317
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:56
options
static const AVOption options[]
Definition: libtwolame.c:179
AV_SAMPLE_FMT_S16P
@ AV_SAMPLE_FMT_S16P
signed 16 bits, planar
Definition: samplefmt.h:64
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:55
AV_SAMPLE_FMT_S16
@ AV_SAMPLE_FMT_S16
signed 16 bits
Definition: samplefmt.h:58
TWOLAMEContext
Definition: libtwolame.c:38
OFFSET
#define OFFSET(x)
Definition: libtwolame.c:177
twolame_defaults
static const FFCodecDefault twolame_defaults[]
Definition: libtwolame.c:202
AE
#define AE
Definition: libtwolame.c:178
twolame_samplerates
static const int twolame_samplerates[]
Definition: libtwolame.c:207
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Underlying C type is int.
Definition: opt.h:259
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:76
AV_CHANNEL_LAYOUT_MONO
#define AV_CHANNEL_LAYOUT_MONO
Definition: channel_layout.h:392
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Special option type for declaring named constants.
Definition: opt.h:299
AV_SAMPLE_FMT_FLT
@ AV_SAMPLE_FMT_FLT
float
Definition: samplefmt.h:60