g722dec.c File Reference

G.722 ADPCM audio decoder. More...

#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "get_bits.h"
#include "g722.h"
#include "internal.h"

Macros
#define	OFFSET(x)   offsetof(G722Context, x)
#define	AD   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM

Variables
AVCodec	ff_adpcm_g722_decoder

Detailed Description

G.722 ADPCM audio decoder.

This G.722 decoder is a bit-exact implementation of the ITU G.722 specification for all three specified bitrates - 64000bps, 56000bps and 48000bps. It passes the ITU tests.

Note

For the 56000bps and 48000bps bitrates, the lowest 1 or 2 bits respectively of each byte are ignored.

Variable Documentation

ff_adpcm_g722_decoder

AVCodec ff_adpcm_g722_decoder

Initial value:

= {
    .name           = "g722",
    .long_name      = NULL_IF_CONFIG_SMALL("G.722 ADPCM"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_ADPCM_G722,
    .priv_data_size = sizeof(G722Context),
    .init           = g722_decode_init,
    .decode         = g722_decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1,
    .priv_class     = &g722_decoder_class,
}