libtwolame.c File Reference

Interface to libtwolame for mp2 encoding. More...

#include <twolame.h>
#include "libavutil/opt.h"
#include "avcodec.h"
#include "internal.h"
#include "mpegaudio.h"

Include dependency graph for libtwolame.c:

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

Typedefs
typedef struct TWOLAMEContext	TWOLAMEContext

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	libtwolame_class
AVCodec	ff_libtwolame_encoder

Detailed Description

Interface to libtwolame for mp2 encoding.

Definition in file libtwolame.c.

Macro Definition Documentation

#define AE   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Definition at line 153 of file libtwolame.c.

#define OFFSET

(

x

)

offsetof(TWOLAMEContext, x)

Definition at line 152 of file libtwolame.c.

Typedef Documentation

typedef struct TWOLAMEContext TWOLAMEContext

Function Documentation

static av_cold int twolame_encode_close ( AVCodecContext *  avctx )

static

Definition at line 47 of file libtwolame.c.

Referenced by twolame_encode_init().

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

static

Definition at line 91 of file libtwolame.c.

static av_cold int twolame_encode_init ( AVCodecContext *  avctx )

static

Definition at line 54 of file libtwolame.c.

Variable Documentation

AVCodec ff_libtwolame_encoder

Initial value:

= {
    .name                  = "libtwolame",
    .type                  = AVMEDIA_TYPE_AUDIO,
    .id                    = AV_CODEC_ID_MP2,
    .priv_data_size        = sizeof(TWOLAMEContext),
    .init                  = twolame_encode_init,
    .encode2               = twolame_encode_frame,
    .close                 = twolame_encode_close,
    .capabilities          = CODEC_CAP_DELAY,
    .sample_fmts           = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLT,
                                                             AV_SAMPLE_FMT_FLTP,
                                                             AV_SAMPLE_FMT_S16,
                                                             AV_SAMPLE_FMT_S16P,
                                                             AV_SAMPLE_FMT_NONE },
    .channel_layouts       = (const uint64_t[]) { AV_CH_LAYOUT_MONO,
                                                  AV_CH_LAYOUT_STEREO,
                                                  0 },
    .supported_samplerates = (const int[]){ 16000, 22050, 24000, 32000, 44100, 48000, 0 },
    .long_name             = NULL_IF_CONFIG_SMALL("libtwolame MP2 (MPEG audio layer 2)"),
    .priv_class            = &libtwolame_class,
}

Definition at line 176 of file libtwolame.c.

const AVClass libtwolame_class

static

Initial value:

= {
    .class_name = "libtwolame encoder",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 169 of file libtwolame.c.

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},
    { NULL },
}

Definition at line 154 of file libtwolame.c.