g722enc.c File Reference

G.722 ADPCM audio encoder. More...

#include "avcodec.h"
#include "g722.h"

Go to the source code of this file.

Macros

#define FREEZE_INTERVAL   128
#define MAX_FRAME_SIZE   32768
#define MIN_TRELLIS   0
#define MAX_TRELLIS   16
#define STORE_NODE(index, UPDATE, VALUE)

Functions

static av_cold int g722_encode_init (AVCodecContext *avctx)
static av_cold int g722_encode_close (AVCodecContext *avctx)
static void filter_samples (G722Context *c, const int16_t *samples, int *xlow, int *xhigh)
static int encode_high (const struct G722Band *state, int xhigh)
static int encode_low (const struct G722Band *state, int xlow)
static void g722_encode_trellis (G722Context *c, int trellis, uint8_t *dst, int nb_samples, const int16_t *samples)
static av_always_inline void encode_byte (G722Context *c, uint8_t *dst, const int16_t *samples)
static void g722_encode_no_trellis (G722Context *c, uint8_t *dst, int nb_samples, const int16_t *samples)
static int g722_encode_frame (AVCodecContext *avctx, uint8_t *dst, int buf_size, void *data)

Variables

static const int16_t low_quant [33]
AVCodec ff_adpcm_g722_encoder

Detailed Description

G.722 ADPCM audio encoder.

Definition in file g722enc.c.

Macro Definition Documentation

#define FREEZE_INTERVAL   128

Definition at line 33 of file g722enc.c.

Referenced by g722_encode_init(), and g722_encode_trellis().

#define MAX_FRAME_SIZE   32768

Definition at line 37 of file g722enc.c.

Referenced by g722_encode_init().

#define MAX_TRELLIS   16

Definition at line 42 of file g722enc.c.

Referenced by g722_encode_init().

#define MIN_TRELLIS   0

Definition at line 41 of file g722enc.c.

Referenced by g722_encode_init().

#define STORE_NODE (   index,
  UPDATE,
  VALUE 
)

Function Documentation

static av_always_inline void encode_byte ( G722Context c,
uint8_t *  dst,
const int16_t *  samples 
)
static

Definition at line 315 of file g722enc.c.

static int encode_high ( const struct G722Band *  state,
int  xhigh 
)
inlinestatic

Definition at line 141 of file g722enc.c.

static int encode_low ( const struct G722Band *  state,
int  xlow 
)
inlinestatic

Definition at line 149 of file g722enc.c.

Referenced by g722_encode_trellis().

static void filter_samples ( G722Context c,
const int16_t *  samples,
int *  xlow,
int *  xhigh 
)
inlinestatic

Definition at line 124 of file g722enc.c.

Referenced by avfilter_filter_samples(), and g722_encode_trellis().

static av_cold int g722_encode_close ( AVCodecContext avctx)
static

Definition at line 105 of file g722enc.c.

static int g722_encode_frame ( AVCodecContext avctx,
uint8_t *  dst,
int  buf_size,
void data 
)
static

Definition at line 337 of file g722enc.c.

static av_cold int g722_encode_init ( AVCodecContext avctx)
static

Definition at line 44 of file g722enc.c.

static void g722_encode_no_trellis ( G722Context c,
uint8_t *  dst,
int  nb_samples,
const int16_t *  samples 
)
static

Definition at line 328 of file g722enc.c.

static void g722_encode_trellis ( G722Context c,
int  trellis,
uint8_t *  dst,
int  nb_samples,
const int16_t *  samples 
)
static

Definition at line 163 of file g722enc.c.

Variable Documentation

AVCodec ff_adpcm_g722_encoder
Initial value:
{
.name = "g722",
.priv_data_size = sizeof(G722Context),
.encode = g722_encode_frame,
.capabilities = CODEC_CAP_SMALL_LAST_FRAME,
.long_name = NULL_IF_CONFIG_SMALL("G.722 ADPCM"),
.sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
}

Definition at line 360 of file g722enc.c.

const int16_t low_quant[33]
static
Initial value:
{
35, 72, 110, 150, 190, 233, 276, 323,
370, 422, 473, 530, 587, 650, 714, 786,
858, 940, 1023, 1121, 1219, 1339, 1458, 1612,
1765, 1980, 2195, 2557, 2919
}

Definition at line 117 of file g722enc.c.

Referenced by encode_low().