FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
Data Structures | Macros | Functions | Variables
libmp3lame.c File Reference

Interface to libmp3lame for mp3 encoding. More...

#include <lame/lame.h>
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/float_dsp.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "audio_frame_queue.h"
#include "internal.h"
#include "mpegaudio.h"
#include "mpegaudiodecheader.h"

Go to the source code of this file.

Data Structures

struct  LAMEContext
 

Macros

#define BUFFER_SIZE   (7200 + 2 * MPA_FRAME_SIZE + MPA_FRAME_SIZE / 4+1000)
 
#define ENCODE_BUFFER(func, buf_type, buf_name)
 
#define OFFSET(x)   offsetof(LAMEContext, x)
 
#define AE   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
 

Functions

static int realloc_buffer (LAMEContext *s)
 
static av_cold int mp3lame_encode_close (AVCodecContext *avctx)
 
static av_cold int mp3lame_encode_init (AVCodecContext *avctx)
 
static int mp3lame_encode_frame (AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
 

Variables

static const AVOption options []
 
static const AVClass libmp3lame_class
 
static const AVCodecDefault libmp3lame_defaults []
 
static const int libmp3lame_sample_rates []
 
AVCodec ff_libmp3lame_encoder
 

Detailed Description

Interface to libmp3lame for mp3 encoding.

Definition in file libmp3lame.c.

Macro Definition Documentation

#define BUFFER_SIZE   (7200 + 2 * MPA_FRAME_SIZE + MPA_FRAME_SIZE / 4+1000)

Definition at line 41 of file libmp3lame.c.

Referenced by realloc_buffer().

#define ENCODE_BUFFER (   func,
  buf_type,
  buf_name 
)
Value:
do { \
lame_result = func(s->gfp, \
(const buf_type *)buf_name[0], \
(const buf_type *)buf_name[1], frame->nb_samples, \
s->buffer + s->buffer_index, \
s->buffer_size - s->buffer_index); \
} while (0)

Definition at line 169 of file libmp3lame.c.

Referenced by mp3lame_encode_frame().

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

Definition at line 271 of file libmp3lame.c.

Definition at line 272 of file libmp3lame.c.

Function Documentation

static int realloc_buffer ( LAMEContext s)
static

Definition at line 59 of file libmp3lame.c.

Referenced by mp3lame_encode_frame(), and mp3lame_encode_init().

static av_cold int mp3lame_encode_close ( AVCodecContext avctx)
static

Definition at line 75 of file libmp3lame.c.

Referenced by mp3lame_encode_init().

static av_cold int mp3lame_encode_init ( AVCodecContext avctx)
static

Definition at line 89 of file libmp3lame.c.

static int mp3lame_encode_frame ( AVCodecContext avctx,
AVPacket avpkt,
const AVFrame frame,
int *  got_packet_ptr 
)
static

Definition at line 177 of file libmp3lame.c.

Variable Documentation

const AVOption options[]
static
Initial value:
= {
{ "reservoir", "use bit reservoir", OFFSET(reservoir), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, AE },
{ "joint_stereo", "use joint stereo", OFFSET(joint_stereo), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, AE },
{ "abr", "use ABR", OFFSET(abr), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AE },
{ NULL },
}

Definition at line 273 of file libmp3lame.c.

const AVClass libmp3lame_class
static
Initial value:
= {
.class_name = "libmp3lame encoder",
.item_name = av_default_item_name,
.option = options,
}

Definition at line 280 of file libmp3lame.c.

const AVCodecDefault libmp3lame_defaults[]
static
Initial value:
= {
{ "b", "0" },
{ NULL },
}

Definition at line 287 of file libmp3lame.c.

const int libmp3lame_sample_rates[]
static
Initial value:
= {
44100, 48000, 32000, 22050, 24000, 16000, 11025, 12000, 8000, 0
}

Definition at line 292 of file libmp3lame.c.

AVCodec ff_libmp3lame_encoder
Initial value:
= {
.name = "libmp3lame",
.long_name = NULL_IF_CONFIG_SMALL("libmp3lame MP3 (MPEG audio layer 3)"),
.priv_data_size = sizeof(LAMEContext),
.supported_samplerates = libmp3lame_sample_rates,
.channel_layouts = (const uint64_t[]) { AV_CH_LAYOUT_MONO,
0 },
.priv_class = &libmp3lame_class,
.defaults = libmp3lame_defaults,
}

Definition at line 296 of file libmp3lame.c.