hcadec.c File Reference

#include "libavutil/crc.h"
#include "libavutil/float_dsp.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/tx.h"
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"
#include "hca_data.h"

Go to the source code of this file.

Data Structures
struct	ChannelContext
struct	HCAContext

Functions
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 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)
static void	unpack (HCAContext *c, ChannelContext *ch, unsigned hfr_group_count, int packed_noise_level, const uint8_t *ath)
static int	decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
static av_cold int	decode_close (AVCodecContext *avctx)

Variables
AVCodec	ff_hca_decoder

Function Documentation

ath_init1()

static void ath_init1 ( uint8_t *  ath, int  sample_rate  )

static

Definition at line 65 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 83 of file hcadec.c.

Referenced by decode_init().

ceil2()

static unsigned ceil2 ( unsigned  a, unsigned  b  )

inlinestatic

Definition at line 99 of file hcadec.c.

Referenced by decode_init().

decode_init()

static av_cold int decode_init ( AVCodecContext *  avctx )

static

Definition at line 104 of file hcadec.c.

run_imdct()

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

static

Definition at line 256 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 266 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 284 of file hcadec.c.

Referenced by decode_frame().

dequantize_coefficients()

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

static

Definition at line 301 of file hcadec.c.

Referenced by decode_frame().

unpack()

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

static

Definition at line 327 of file hcadec.c.

Referenced by decode_frame().

decode_frame()

static int decode_frame ( AVCodecContext *  avctx, void *  data, int *  got_frame_ptr, AVPacket *  avpkt  )

static

Definition at line 387 of file hcadec.c.

decode_close()

static av_cold int decode_close ( AVCodecContext *  avctx )

static

Definition at line 436 of file hcadec.c.

Variable Documentation

ff_hca_decoder

AVCodec ff_hca_decoder

Initial value:

= {
    .name           = "hca",
    .long_name      = NULL_IF_CONFIG_SMALL("CRI HCA"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_HCA,
    .priv_data_size = sizeof(HCAContext),
    .init           = decode_init,
    .decode         = decode_frame,
    .close          = decode_close,
    .capabilities   = AV_CODEC_CAP_DR1,
    .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                      AV_SAMPLE_FMT_NONE },
}

Definition at line 446 of file hcadec.c.