g722enc.c File Reference

G.722 ADPCM audio encoder. More...

#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/mem.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "encode.h"
#include "g722.h"
#include "libavutil/common.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_close (AVCodecContext *avctx)
static av_cold int	g722_encode_init (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, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)

Variables
static const int16_t	low_quant [33]
const FFCodec	ff_adpcm_g722_encoder

Detailed Description

G.722 ADPCM audio encoder.

Definition in file g722enc.c.

Macro Definition Documentation

FREEZE_INTERVAL

#define FREEZE_INTERVAL   128

Definition at line 39 of file g722enc.c.

MAX_FRAME_SIZE

#define MAX_FRAME_SIZE   32768

Definition at line 43 of file g722enc.c.

MIN_TRELLIS

#define MIN_TRELLIS   0

Definition at line 47 of file g722enc.c.

Referenced by g722_encode_init().

MAX_TRELLIS

#define MAX_TRELLIS   16

Definition at line 48 of file g722enc.c.

Referenced by g722_encode_init().

STORE_NODE

#define STORE_NODE	(		index,
			UPDATE,
			VALUE )

Referenced by g722_encode_trellis().

Function Documentation

g722_encode_close()

static av_cold int g722_encode_close ( AVCodecContext * avctx )

static

Definition at line 50 of file g722enc.c.

g722_encode_init()

static av_cold int g722_encode_init ( AVCodecContext * avctx )

static

Definition at line 62 of file g722enc.c.

filter_samples()

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

inlinestatic

Definition at line 129 of file g722enc.c.

Referenced by g722_encode_trellis().

encode_high()

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

inlinestatic

Definition at line 146 of file g722enc.c.

encode_low()

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

inlinestatic

Definition at line 154 of file g722enc.c.

Referenced by g722_encode_trellis().

g722_encode_trellis()

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

static

Definition at line 168 of file g722enc.c.

encode_byte()

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

static

Definition at line 319 of file g722enc.c.

g722_encode_no_trellis()

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

static

Definition at line 332 of file g722enc.c.

g722_encode_frame()

static int g722_encode_frame ( AVCodecContext * avctx, AVPacket * avpkt, const AVFrame * frame, int * got_packet_ptr )

static

Definition at line 341 of file g722enc.c.

Variable Documentation

low_quant

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 122 of file g722enc.c.

Referenced by encode_low().

ff_adpcm_g722_encoder

const FFCodec ff_adpcm_g722_encoder

Initial value:

= {
    .p.name          = "g722",
    CODEC_LONG_NAME("G.722 ADPCM"),
    .p.type          = AVMEDIA_TYPE_AUDIO,
    .p.id            = AV_CODEC_ID_ADPCM_G722,
    .p.capabilities  = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SMALL_LAST_FRAME |
                       AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
    .priv_data_size  = sizeof(G722Context),
    .init            = g722_encode_init,
    .close           = g722_encode_close,
    FF_CODEC_ENCODE_CB(g722_encode_frame),
    CODEC_SAMPLEFMTS(AV_SAMPLE_FMT_S16),
    CODEC_CH_LAYOUTS(AV_CHANNEL_LAYOUT_MONO),
    .caps_internal   = FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 371 of file g722enc.c.