rka.c File Reference

#include "libavutil/channel_layout.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "bytestream.h"
#include "decode.h"

Go to the source code of this file.

Data Structures
struct	ACoder
struct	FiltCoeffs
struct	Model64
struct	AdaptiveModel
struct	ChContext
struct	RKAContext

Functions
static int	adaptive_model_init (AdaptiveModel *am, int buf_size)
static void	adaptive_model_free (AdaptiveModel *am)
static av_cold int	rka_decode_init (AVCodecContext *avctx)
static void	model64_init (Model64 *m, unsigned bits)
static int	chctx_init (RKAContext *s, ChContext *c, int sample_rate, int bps)
static void	init_acoder (ACoder *ac)
static int	ac_decode_bool (ACoder *ac, int freq1, int freq2)
static int	decode_bool (ACoder *ac, ChContext *c, int idx)
static int	ac_get_freq (ACoder *ac, unsigned freq, int *result)
static int	ac_update (ACoder *ac, int freq, int mul)
static void	amdl_update_prob (AdaptiveModel *am, int val, int diff)
static void	update_ch_subobj (AdaptiveModel *am)
static int	amdl_decode_int (AdaptiveModel *am, ACoder *ac, unsigned *dst, unsigned size)
static int	decode_filt_coeffs (RKAContext *s, ChContext *ctx, ACoder *ac, FiltCoeffs *dst)
static int	ac_dec_bit (ACoder *ac)
static int	mdl64_decode (ACoder *ac, Model64 *ctx, int *dst)
static int	decode_filter (RKAContext *s, ChContext *ctx, ACoder *ac, int off, unsigned size)
static int	decode_samples (AVCodecContext *avctx, ACoder *ac, ChContext *ctx, int offset)
static int	decode_ch_samples (AVCodecContext *avctx, ChContext *c)
static int	rka_decode_frame (AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt)
static av_cold int	rka_decode_close (AVCodecContext *avctx)

Variables
static const uint8_t	vrq_qfactors [8] = { 3, 3, 2, 2, 1, 1, 1, 1 }
const FFCodec	ff_rka_decoder

Function Documentation

adaptive_model_init()

static int adaptive_model_init ( AdaptiveModel *  am, int  buf_size  )

static

Definition at line 106 of file rka.c.

Referenced by chctx_init().

adaptive_model_free()

static void adaptive_model_free ( AdaptiveModel *  am )

static

Definition at line 126 of file rka.c.

Referenced by rka_decode_close().

rka_decode_init()

static av_cold int rka_decode_init ( AVCodecContext *  avctx )

static

Definition at line 132 of file rka.c.

model64_init()

static void model64_init ( Model64 *  m, unsigned  bits  )

static

Definition at line 180 of file rka.c.

Referenced by chctx_init().

chctx_init()

static int chctx_init ( RKAContext *  s, ChContext *  c, int  sample_rate, int  bps  )

static

Definition at line 201 of file rka.c.

Referenced by rka_decode_frame().

init_acoder()

static void init_acoder ( ACoder *  ac )

static

Definition at line 247 of file rka.c.

Referenced by rka_decode_frame().

ac_decode_bool()

static int ac_decode_bool ( ACoder *  ac, int  freq1, int  freq2  )

static

Definition at line 254 of file rka.c.

Referenced by amdl_decode_int(), decode_bool(), and mdl64_decode().

decode_bool()

static int decode_bool ( ACoder *  ac, ChContext *  c, int  idx  )

static

Definition at line 301 of file rka.c.

Referenced by decode_filt_coeffs().

ac_get_freq()

static int ac_get_freq ( ACoder *  ac, unsigned  freq, int *  result  )

static

Definition at line 321 of file rka.c.

Referenced by amdl_decode_int(), decode_filt_coeffs(), decode_samples(), and mdl64_decode().

ac_update()

static int ac_update ( ACoder *  ac, int  freq, int  mul  )

static

Definition at line 339 of file rka.c.

Referenced by amdl_decode_int(), decode_filt_coeffs(), decode_samples(), and mdl64_decode().

amdl_update_prob()

static void amdl_update_prob ( AdaptiveModel *  am, int  val, int  diff  )

static

Definition at line 364 of file rka.c.

Referenced by amdl_decode_int(), and update_ch_subobj().

update_ch_subobj()

static void update_ch_subobj ( AdaptiveModel *  am )

static

Definition at line 377 of file rka.c.

Referenced by amdl_decode_int().

amdl_decode_int()

static int amdl_decode_int ( AdaptiveModel *  am, ACoder *  ac, unsigned *  dst, unsigned  size  )

static

Definition at line 410 of file rka.c.

Referenced by decode_filt_coeffs(), decode_filter(), and decode_samples().

decode_filt_coeffs()

static int decode_filt_coeffs ( RKAContext *  s, ChContext *  ctx, ACoder *  ac, FiltCoeffs *  dst  )

static

Definition at line 495 of file rka.c.

Referenced by decode_filter().

ac_dec_bit()

static int ac_dec_bit ( ACoder *  ac )

static

Definition at line 547 of file rka.c.

Referenced by mdl64_decode().

mdl64_decode()

static int mdl64_decode ( ACoder *  ac, Model64 *  ctx, int *  dst  )

static

Definition at line 590 of file rka.c.

Referenced by decode_filter().

decode_filter()

static int decode_filter ( RKAContext *  s, ChContext *  ctx, ACoder *  ac, int  off, unsigned  size  )

static

Definition at line 675 of file rka.c.

Referenced by decode_samples().

decode_samples()

static int decode_samples ( AVCodecContext *  avctx, ACoder *  ac, ChContext *  ctx, int  offset  )

static

Definition at line 770 of file rka.c.

Referenced by decode_ch_samples().

decode_ch_samples()

static int decode_ch_samples ( AVCodecContext *  avctx, ChContext *  c  )

static

Definition at line 829 of file rka.c.

Referenced by rka_decode_frame().

rka_decode_frame()

static int rka_decode_frame ( AVCodecContext *  avctx, AVFrame *  frame, int *  got_frame_ptr, AVPacket *  avpkt  )

static

Definition at line 849 of file rka.c.

rka_decode_close()

static av_cold int rka_decode_close ( AVCodecContext *  avctx )

static

Definition at line 966 of file rka.c.

Variable Documentation

vrq_qfactors

const uint8_t vrq_qfactors[8] = { 3, 3, 2, 2, 1, 1, 1, 1 }

static

Definition at line 673 of file rka.c.

Referenced by decode_filter().

ff_rka_decoder

const FFCodec ff_rka_decoder

Initial value:

= {
    .p.name         = "rka",
    CODEC_LONG_NAME("RKA (RK Audio)"),
    .p.type         = AVMEDIA_TYPE_AUDIO,
    .p.id           = AV_CODEC_ID_RKA,
    .priv_data_size = sizeof(RKAContext),
    .init           = rka_decode_init,
    .close          = rka_decode_close,
    FF_CODEC_DECODE_CB(rka_decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 987 of file rka.c.