hcadec.c File Reference

#include "libavutil/crc.h"
#include "libavutil/float_dsp.h"
#include "libavutil/mem_internal.h"
#include "libavutil/tx.h"
#include "avcodec.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "decode.h"
#include "get_bits.h"
#include "hca_data.h"

Go to the source code of this file.

Data Structures
struct	ChannelContext
struct	HCAContext

Macros
#define	HCA_MASK   0x7f7f7f7f
#define	MAX_CHANNELS   16

Functions
static void	cipher_init56_create_table (uint8_t *r, uint8_t key)
static void	cipher_init56 (uint8_t *cipher, uint64_t keycode)
static void	cipher_init (uint8_t *cipher, int type, uint64_t keycode, uint16_t subkey)
static void	ath_init1 (uint8_t *ath, int sample_rate)
static int	ath_init (uint8_t *ath, int type, int sample_rate)
static unsigned	ceil2 (unsigned a, unsigned b)
static av_cold void	init_flush (AVCodecContext *avctx)
static int	init_hca (AVCodecContext *avctx, const uint8_t *extradata, const int extradata_size)
static av_cold int	decode_init (AVCodecContext *avctx)
static void	run_imdct (HCAContext *c, ChannelContext *ch, int index, float *out)
static void	apply_intensity_stereo (HCAContext *s, ChannelContext *ch1, ChannelContext *ch2, int index, unsigned band_count, unsigned base_band_count, unsigned stereo_band_count)
static void	reconstruct_hfr (HCAContext *s, ChannelContext *ch, unsigned hfr_group_count, unsigned bands_per_hfr_group, unsigned start_band, unsigned total_band_count)
static void	dequantize_coefficients (HCAContext *c, ChannelContext *ch, GetBitContext *gb)
static void	unpack (HCAContext *c, ChannelContext *ch, GetBitContext *gb, unsigned hfr_group_count, int packed_noise_level, const uint8_t *ath)
static int	decode_frame (AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt)
static av_cold int	decode_close (AVCodecContext *avctx)
static av_cold void	decode_flush (AVCodecContext *avctx)

Variables
const FFCodec	ff_hca_decoder

Macro Definition Documentation

HCA_MASK

#define HCA_MASK   0x7f7f7f7f

Definition at line 31 of file hcadec.c.

MAX_CHANNELS

#define MAX_CHANNELS   16

Definition at line 32 of file hcadec.c.

Function Documentation

cipher_init56_create_table()

static void cipher_init56_create_table ( uint8_t *  r, uint8_t  key  )

static

Definition at line 74 of file hcadec.c.

Referenced by cipher_init56().

cipher_init56()

static void cipher_init56 ( uint8_t *  cipher, uint64_t  keycode  )

static

Definition at line 86 of file hcadec.c.

Referenced by cipher_init().

cipher_init()

static void cipher_init ( uint8_t *  cipher, int  type, uint64_t  keycode, uint16_t  subkey  )

static

Definition at line 144 of file hcadec.c.

Referenced by init_hca().

ath_init1()

static void ath_init1 ( uint8_t *  ath, int  sample_rate  )

static

Definition at line 161 of file hcadec.c.

Referenced by ath_init().

ath_init()

static int ath_init ( uint8_t *  ath, int  type, int  sample_rate  )

static

Definition at line 179 of file hcadec.c.

Referenced by init_hca().

ceil2()

static unsigned ceil2 ( unsigned  a, unsigned  b  )

inlinestatic

Definition at line 195 of file hcadec.c.

Referenced by init_hca().

init_flush()

static av_cold void init_flush ( AVCodecContext *  avctx )

static

Definition at line 200 of file hcadec.c.

Referenced by init_hca().

init_hca()

static int init_hca ( AVCodecContext *  avctx, const uint8_t *  extradata, const int  extradata_size  )

static

Definition at line 207 of file hcadec.c.

Referenced by decode_frame(), and decode_init().

decode_init()

static av_cold int decode_init ( AVCodecContext *  avctx )

static

Definition at line 361 of file hcadec.c.

run_imdct()

static void run_imdct ( HCAContext *  c, ChannelContext *  ch, int  index, float *  out  )

static

Definition at line 389 of file hcadec.c.

Referenced by decode_frame().

apply_intensity_stereo()

static void apply_intensity_stereo ( HCAContext *  s, ChannelContext *  ch1, ChannelContext *  ch2, int  index, unsigned  band_count, unsigned  base_band_count, unsigned  stereo_band_count  )

static

Definition at line 399 of file hcadec.c.

Referenced by decode_frame().

reconstruct_hfr()

static void reconstruct_hfr ( HCAContext *  s, ChannelContext *  ch, unsigned  hfr_group_count, unsigned  bands_per_hfr_group, unsigned  start_band, unsigned  total_band_count  )

static

Definition at line 417 of file hcadec.c.

Referenced by decode_frame().

dequantize_coefficients()

static void dequantize_coefficients ( HCAContext *  c, ChannelContext *  ch, GetBitContext *  gb  )

static

Definition at line 435 of file hcadec.c.

Referenced by decode_frame().

unpack()

static void unpack ( HCAContext *  c, ChannelContext *  ch, GetBitContext *  gb, unsigned  hfr_group_count, int  packed_noise_level, const uint8_t *  ath  )

static

Definition at line 465 of file hcadec.c.

Referenced by decode_frame().

decode_frame()

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

static

Definition at line 525 of file hcadec.c.

decode_close()

static av_cold int decode_close ( AVCodecContext *  avctx )

static

Definition at line 606 of file hcadec.c.

decode_flush()

static av_cold void decode_flush ( AVCodecContext *  avctx )

static

Definition at line 616 of file hcadec.c.

Variable Documentation

ff_hca_decoder

const FFCodec ff_hca_decoder

Initial value:

= {
    .p.name         = "hca",
    CODEC_LONG_NAME("CRI HCA"),
    .p.type         = AVMEDIA_TYPE_AUDIO,
    .p.id           = AV_CODEC_ID_HCA,
    .priv_data_size = sizeof(HCAContext),
    .init           = decode_init,
    FF_CODEC_DECODE_CB(decode_frame),
    .flush          = decode_flush,
    .close          = decode_close,
    .p.capabilities = AV_CODEC_CAP_DR1,
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
    .p.sample_fmts  = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                      AV_SAMPLE_FMT_NONE },
}

Definition at line 624 of file hcadec.c.