FFmpeg  4.0
Data Structures | Macros | Functions | Variables
libopusenc.c File Reference
#include <opus.h>
#include <opus_multistream.h>
#include "libavutil/opt.h"
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"
#include "libopus.h"
#include "vorbis.h"
#include "audio_frame_queue.h"

Go to the source code of this file.

Data Structures

struct  LibopusEncOpts
 
struct  LibopusEncContext
 

Macros

#define OFFSET(x)   offsetof(LibopusEncContext, opts.x)
 
#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
 

Functions

static void libopus_write_header (AVCodecContext *avctx, int stream_count, int coupled_stream_count, int mapping_family, const uint8_t *channel_mapping)
 
static int libopus_configure_encoder (AVCodecContext *avctx, OpusMSEncoder *enc, LibopusEncOpts *opts)
 
static int libopus_check_max_channels (AVCodecContext *avctx, int max_channels)
 
static int libopus_check_vorbis_layout (AVCodecContext *avctx, int mapping_family)
 
static int libopus_validate_layout_and_get_channel_map (AVCodecContext *avctx, int mapping_family, const uint8_t **channel_map_result)
 
static av_cold int libopus_encode_init (AVCodecContext *avctx)
 
static void libopus_copy_samples_with_channel_map (uint8_t *dst, const uint8_t *src, const uint8_t *channel_map, int nb_channels, int nb_samples, int bytes_per_sample)
 
static int libopus_encode (AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
 
static av_cold int libopus_encode_close (AVCodecContext *avctx)
 

Variables

static const uint8_t opus_coupled_streams [8]
 
static const uint8_t opus_vorbis_channel_map [8][8]
 
static const uint8_t libavcodec_libopus_channel_map [8][8]
 
static const AVOption libopus_options []
 
static const AVClass libopus_class
 
static const AVCodecDefault libopus_defaults []
 
static const int libopus_sample_rates []
 
AVCodec ff_libopus_encoder
 

Macro Definition Documentation

◆ OFFSET

#define OFFSET (   x)    offsetof(LibopusEncContext, opts.x)

Definition at line 530 of file libopusenc.c.

◆ FLAGS

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Definition at line 531 of file libopusenc.c.

Function Documentation

◆ libopus_write_header()

static void libopus_write_header ( AVCodecContext *  avctx,
int  stream_count,
int  coupled_stream_count,
int  mapping_family,
const uint8_t *  channel_mapping 
)
static

Definition at line 85 of file libopusenc.c.

Referenced by libopus_encode_init().

◆ libopus_configure_encoder()

static int libopus_configure_encoder ( AVCodecContext *  avctx,
OpusMSEncoder *  enc,
LibopusEncOpts *  opts 
)
static

Definition at line 109 of file libopusenc.c.

Referenced by libopus_encode_init().

◆ libopus_check_max_channels()

static int libopus_check_max_channels ( AVCodecContext *  avctx,
int  max_channels 
)
static

Definition at line 171 of file libopusenc.c.

Referenced by libopus_validate_layout_and_get_channel_map().

◆ libopus_check_vorbis_layout()

static int libopus_check_vorbis_layout ( AVCodecContext *  avctx,
int  mapping_family 
)
static

Definition at line 182 of file libopusenc.c.

Referenced by libopus_validate_layout_and_get_channel_map().

◆ libopus_validate_layout_and_get_channel_map()

static int libopus_validate_layout_and_get_channel_map ( AVCodecContext *  avctx,
int  mapping_family,
const uint8_t **  channel_map_result 
)
static

Definition at line 203 of file libopusenc.c.

Referenced by libopus_encode_init().

◆ libopus_encode_init()

static av_cold int libopus_encode_init ( AVCodecContext *  avctx)
static

Definition at line 248 of file libopusenc.c.

◆ libopus_copy_samples_with_channel_map()

static void libopus_copy_samples_with_channel_map ( uint8_t *  dst,
const uint8_t *  src,
const uint8_t *  channel_map,
int  nb_channels,
int  nb_samples,
int  bytes_per_sample 
)
static

Definition at line 421 of file libopusenc.c.

Referenced by libopus_encode().

◆ libopus_encode()

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

Definition at line 435 of file libopusenc.c.

◆ libopus_encode_close()

static av_cold int libopus_encode_close ( AVCodecContext *  avctx)
static

Definition at line 516 of file libopusenc.c.

Variable Documentation

◆ opus_coupled_streams

const uint8_t opus_coupled_streams[8]
static
Initial value:
= {
0, 1, 1, 2, 2, 2, 2, 3
}

Definition at line 57 of file libopusenc.c.

Referenced by libopus_encode_init().

◆ opus_vorbis_channel_map

const uint8_t opus_vorbis_channel_map[8][8]
static
Initial value:
= {
{ 0 },
{ 0, 1 },
{ 0, 2, 1 },
{ 0, 1, 2, 3 },
{ 0, 4, 1, 2, 3 },
{ 0, 4, 1, 2, 3, 5 },
{ 0, 4, 1, 2, 3, 5, 6 },
{ 0, 6, 1, 2, 3, 4, 5, 7 },
}

Definition at line 62 of file libopusenc.c.

Referenced by libopus_encode_init().

◆ libavcodec_libopus_channel_map

const uint8_t libavcodec_libopus_channel_map[8][8]
static
Initial value:
= {
{ 0 },
{ 0, 1 },
{ 0, 1, 2 },
{ 0, 1, 2, 3 },
{ 0, 1, 3, 4, 2 },
{ 0, 1, 4, 5, 2, 3 },
{ 0, 1, 5, 6, 2, 4, 3 },
{ 0, 1, 6, 7, 4, 5, 2, 3 },
}

Definition at line 74 of file libopusenc.c.

Referenced by libopus_encode_init().

◆ libopus_options

const AVOption libopus_options[]
static
Initial value:
= {
{ "application", "Intended application type", OFFSET(application), AV_OPT_TYPE_INT, { .i64 = OPUS_APPLICATION_AUDIO }, OPUS_APPLICATION_VOIP, OPUS_APPLICATION_RESTRICTED_LOWDELAY, FLAGS, "application" },
{ "voip", "Favor improved speech intelligibility", 0, AV_OPT_TYPE_CONST, { .i64 = OPUS_APPLICATION_VOIP }, 0, 0, FLAGS, "application" },
{ "audio", "Favor faithfulness to the input", 0, AV_OPT_TYPE_CONST, { .i64 = OPUS_APPLICATION_AUDIO }, 0, 0, FLAGS, "application" },
{ "lowdelay", "Restrict to only the lowest delay modes", 0, AV_OPT_TYPE_CONST, { .i64 = OPUS_APPLICATION_RESTRICTED_LOWDELAY }, 0, 0, FLAGS, "application" },
{ "frame_duration", "Duration of a frame in milliseconds", OFFSET(frame_duration), AV_OPT_TYPE_FLOAT, { .dbl = 20.0 }, 2.5, 60.0, FLAGS },
{ "packet_loss", "Expected packet loss percentage", OFFSET(packet_loss), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 100, FLAGS },
{ "vbr", "Variable bit rate mode", OFFSET(vbr), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 2, FLAGS, "vbr" },
{ "off", "Use constant bit rate", 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, 0, 0, FLAGS, "vbr" },
{ "on", "Use variable bit rate", 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, 0, 0, FLAGS, "vbr" },
{ "constrained", "Use constrained VBR", 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, 0, 0, FLAGS, "vbr" },
{ "mapping_family", "Channel Mapping Family", OFFSET(mapping_family), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 255, FLAGS, "mapping_family" },
{ NULL },
}
NULL
#define NULL
Definition: coverity.c:32
AV_OPT_TYPE_INT
Definition: opt.h:223
OFFSET
#define OFFSET(x)
Definition: libopusenc.c:530
AV_OPT_TYPE_CONST
Definition: opt.h:232
AV_OPT_TYPE_FLOAT
Definition: opt.h:226
FLAGS
#define FLAGS
Definition: libopusenc.c:531

Definition at line 532 of file libopusenc.c.

◆ libopus_class

const AVClass libopus_class
static
Initial value:
= {
.class_name = "libopus",
.item_name = av_default_item_name,
.option = libopus_options,
.version = LIBAVUTIL_VERSION_INT,
}
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
libopus_options
static const AVOption libopus_options[]
Definition: libopusenc.c:532

Definition at line 550 of file libopusenc.c.

◆ libopus_defaults

const AVCodecDefault libopus_defaults[]
static
Initial value:
= {
{ "b", "0" },
{ "compression_level", "10" },
{ NULL },
}
NULL
#define NULL
Definition: coverity.c:32

Definition at line 557 of file libopusenc.c.

◆ libopus_sample_rates

const int libopus_sample_rates[]
static
Initial value:
= {
48000, 24000, 16000, 12000, 8000, 0,
}

Definition at line 563 of file libopusenc.c.

◆ ff_libopus_encoder

AVCodec ff_libopus_encoder
Initial value:
= {
.name = "libopus",
.long_name = NULL_IF_CONFIG_SMALL("libopus Opus"),
.type = AVMEDIA_TYPE_AUDIO,
.id = AV_CODEC_ID_OPUS,
.priv_data_size = sizeof(LibopusEncContext),
.init = libopus_encode_init,
.encode2 = libopus_encode,
.close = libopus_encode_close,
.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SMALL_LAST_FRAME,
.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
AV_SAMPLE_FMT_FLT,
AV_SAMPLE_FMT_NONE },
.supported_samplerates = libopus_sample_rates,
.priv_class = &libopus_class,
.defaults = libopus_defaults,
.wrapper_name = "libopus",
}
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
AV_SAMPLE_FMT_FLT
float
Definition: samplefmt.h:63
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: avcodec.h:984
libopus_class
static const AVClass libopus_class
Definition: libopusenc.c:550
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:186
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_CODEC_CAP_SMALL_LAST_FRAME
#define AV_CODEC_CAP_SMALL_LAST_FRAME
Codec can be fed a final frame with a smaller size.
Definition: avcodec.h:989
libopus_sample_rates
static const int libopus_sample_rates[]
Definition: libopusenc.c:563
AV_CODEC_ID_OPUS
Definition: avcodec.h:611
libopus_encode_init
static av_cold int libopus_encode_init(AVCodecContext *avctx)
Definition: libopusenc.c:248
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
libopus_encode
static int libopus_encode(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Definition: libopusenc.c:435
libopus_encode_close
static av_cold int libopus_encode_close(AVCodecContext *avctx)
Definition: libopusenc.c:516
AV_SAMPLE_FMT_S16
signed 16 bits
Definition: samplefmt.h:61
libopus_defaults
static const AVCodecDefault libopus_defaults[]
Definition: libopusenc.c:557
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701

Definition at line 567 of file libopusenc.c.

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