spdifenc.c File Reference

IEC-61937 encapsulation of various formats, used by S/PDIF. More...

#include "avformat.h"
#include "avio_internal.h"
#include "spdif.h"
#include "libavcodec/ac3.h"
#include "libavcodec/dca.h"
#include "libavcodec/aacadtsdec.h"
#include "libavutil/opt.h"

Go to the source code of this file.

Data Structures
struct	IEC61937Context

Macros
#define	SPDIF_FLAG_BIGENDIAN   0x01
#define	MAT_FRAME_SIZE   61424
#define	TRUEHD_FRAME_OFFSET   2560
#define	MAT_MIDDLE_CODE_OFFSET   -4

Functions
static int	spdif_header_ac3 (AVFormatContext *s, AVPacket *pkt)
static int	spdif_header_eac3 (AVFormatContext *s, AVPacket *pkt)
static int	spdif_dts4_subtype (int period)
static int	spdif_header_dts4 (AVFormatContext *s, AVPacket *pkt, int core_size, int sample_rate, int blocks)
static int	spdif_header_dts (AVFormatContext *s, AVPacket *pkt)
static int	spdif_header_mpeg (AVFormatContext *s, AVPacket *pkt)
static int	spdif_header_aac (AVFormatContext *s, AVPacket *pkt)
static int	spdif_header_truehd (AVFormatContext *s, AVPacket *pkt)
static int	spdif_write_header (AVFormatContext *s)
static int	spdif_write_trailer (AVFormatContext *s)
static av_always_inline void	spdif_put_16 (IEC61937Context *ctx, AVIOContext *pb, unsigned int val)
static int	spdif_write_packet (struct AVFormatContext *s, AVPacket *pkt)

Variables
static const AVOption	options []
static const AVClass	spdif_class
static enum IEC61937DataType	mpeg_data_type [2][3]
AVOutputFormat	ff_spdif_muxer

Detailed Description

IEC-61937 encapsulation of various formats, used by S/PDIF.

Author

Bartlomiej Wolowiec

Anssi Hannula

Carl Eugen Hoyos

Definition in file spdifenc.c.

Macro Definition Documentation

#define SPDIF_FLAG_BIGENDIAN   0x01

Definition at line 79 of file spdifenc.c.

Referenced by spdif_put_16(), and spdif_write_packet().

#define MAT_FRAME_SIZE   61424

Definition at line 390 of file spdifenc.c.

Referenced by spdif_header_truehd(), and spdif_write_header().

#define TRUEHD_FRAME_OFFSET   2560

Definition at line 391 of file spdifenc.c.

Referenced by spdif_header_truehd().

#define MAT_MIDDLE_CODE_OFFSET   -4

Definition at line 392 of file spdifenc.c.

Referenced by spdif_header_truehd().

Function Documentation

static int spdif_header_ac3 ( AVFormatContext *  s, AVPacket *  pkt  )

static

Definition at line 102 of file spdifenc.c.

Referenced by spdif_write_header().

static int spdif_header_eac3 ( AVFormatContext *  s, AVPacket *  pkt  )

static

Definition at line 112 of file spdifenc.c.

Referenced by spdif_write_header().

static int spdif_dts4_subtype ( int  period )

static

Definition at line 150 of file spdifenc.c.

Referenced by spdif_header_dts4().

static int spdif_header_dts4 ( AVFormatContext *  s, AVPacket *  pkt, int  core_size, int  sample_rate, int  blocks  )

static

Definition at line 163 of file spdifenc.c.

Referenced by spdif_header_dts().

static int spdif_header_dts ( AVFormatContext *  s, AVPacket *  pkt  )

static

Definition at line 240 of file spdifenc.c.

Referenced by spdif_write_header().

static int spdif_header_mpeg ( AVFormatContext *  s, AVPacket *  pkt  )

static

Definition at line 323 of file spdifenc.c.

Referenced by spdif_write_header().

static int spdif_header_aac ( AVFormatContext *  s, AVPacket *  pkt  )

static

Definition at line 346 of file spdifenc.c.

Referenced by spdif_write_header().

static int spdif_header_truehd ( AVFormatContext *  s, AVPacket *  pkt  )

static

Definition at line 394 of file spdifenc.c.

Referenced by spdif_write_header().

static int spdif_write_header ( AVFormatContext *  s )

static

Definition at line 440 of file spdifenc.c.

static int spdif_write_trailer ( AVFormatContext *  s )

static

Definition at line 475 of file spdifenc.c.

static av_always_inline void spdif_put_16 ( IEC61937Context *  ctx, AVIOContext *  pb, unsigned int  val  )

static

Definition at line 483 of file spdifenc.c.

Referenced by spdif_write_packet().

static int spdif_write_packet ( struct AVFormatContext *  s, AVPacket *  pkt  )

static

Definition at line 492 of file spdifenc.c.

Variable Documentation

const AVOption options[]

static

Initial value:

= {
{ "spdif_flags", "IEC 61937 encapsulation flags", 0x42, AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "spdif_flags" },
{ "be", "output in big-endian format (for use as s16be)", 0, AV_OPT_TYPE_CONST, {.i64 = SPDIF_FLAG_BIGENDIAN},  0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "spdif_flags" },
{ "dtshd_rate", "mux complete DTS frames in HD mode at the specified IEC958 rate (in Hz, default 0=disabled)", 0x42, AV_OPT_TYPE_INT, {.i64 = 0}, 0, 768000, AV_OPT_FLAG_ENCODING_PARAM },
{ "dtshd_fallback_time", "min secs to strip HD for after an overflow (-1: till the end, default 60)", 0x42, AV_OPT_TYPE_INT, {.i64 = 60}, -1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
{ NULL },
}

Definition at line 87 of file spdifenc.c.

const AVClass spdif_class

static

Initial value:

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

Definition at line 95 of file spdifenc.c.

enum IEC61937DataType mpeg_data_type[2][3]

static

Initial value:

= {
    
    { IEC61937_MPEG2_LAYER1_LSF, IEC61937_MPEG2_LAYER2_LSF, IEC61937_MPEG2_LAYER3_LSF },
    { IEC61937_MPEG1_LAYER1,     IEC61937_MPEG1_LAYER23,    IEC61937_MPEG1_LAYER23 },   
}

Definition at line 317 of file spdifenc.c.

Referenced by spdif_header_mpeg().

AVOutputFormat ff_spdif_muxer

Initial value:

= {
    .name              = "spdif",
    .long_name         = NULL_IF_CONFIG_SMALL("IEC 61937 (used on S/PDIF - IEC958)"),
    .extensions        = "spdif",
    .priv_data_size    = sizeof(IEC61937Context),
    .audio_codec       = AV_CODEC_ID_AC3,
    .video_codec       = AV_CODEC_ID_NONE,
    .write_header      = spdif_write_header,
    .write_packet      = spdif_write_packet,
    .write_trailer     = spdif_write_trailer,
    .flags             = AVFMT_NOTIMESTAMPS,
    .priv_class        = &spdif_class,
}

Definition at line 544 of file spdifenc.c.