gsmdec.c File Reference

#include "libavutil/channel_layout.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "avformat.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	GSMDemuxerContext

Macros
#define	GSM_BLOCK_SIZE   33
#define	GSM_BLOCK_SAMPLES   160
#define	GSM_SAMPLE_RATE   8000

Functions
static int	gsm_probe (AVProbeData *p)
static int	gsm_read_packet (AVFormatContext *s, AVPacket *pkt)
static int	gsm_read_header (AVFormatContext *s)

Variables
static const AVOption	options []
static const AVClass	gsm_class
AVInputFormat	ff_gsm_demuxer

Macro Definition Documentation

GSM_BLOCK_SIZE

#define GSM_BLOCK_SIZE   33

Definition at line 28 of file gsmdec.c.

Referenced by gsm_init(), gsm_read_header(), and gsm_read_packet().

GSM_BLOCK_SAMPLES

#define GSM_BLOCK_SAMPLES   160

Definition at line 29 of file gsmdec.c.

Referenced by gsm_read_header().

GSM_SAMPLE_RATE

#define GSM_SAMPLE_RATE   8000

Definition at line 30 of file gsmdec.c.

Referenced by gsm_read_header().

Function Documentation

gsm_probe()

static int gsm_probe ( AVProbeData *  p )

static

Definition at line 37 of file gsmdec.c.

gsm_read_packet()

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

static

Definition at line 54 of file gsmdec.c.

gsm_read_header()

static int gsm_read_header ( AVFormatContext *  s )

static

Definition at line 74 of file gsmdec.c.

Variable Documentation

options

const AVOption options[]

static

Initial value:

= {
    { "sample_rate", "", 0x42,
       AV_OPT_TYPE_INT, {.i64 = GSM_SAMPLE_RATE}, 1, INT_MAX / GSM_BLOCK_SIZE,
       AV_OPT_FLAG_DECODING_PARAM },
    { NULL },
}

Definition at line 93 of file gsmdec.c.

gsm_class

const AVClass gsm_class

static

Initial value:

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

Definition at line 100 of file gsmdec.c.

ff_gsm_demuxer

AVInputFormat ff_gsm_demuxer

Initial value:

= {
    .name           = "gsm",
    .long_name      = NULL_IF_CONFIG_SMALL("raw GSM"),
    .priv_data_size = sizeof(GSMDemuxerContext),
    .read_probe     = gsm_probe,
    .read_header    = gsm_read_header,
    .read_packet    = gsm_read_packet,
    .flags          = AVFMT_GENERIC_INDEX,
    .extensions     = "gsm",
    .raw_codec_id   = AV_CODEC_ID_GSM,
    .priv_class     = &gsm_class,
}

Definition at line 107 of file gsmdec.c.