dcaenc.c File Reference

#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/ffmath.h"
#include "libavutil/mem_internal.h"
#include "libavutil/opt.h"
#include "libavutil/thread.h"
#include "libavutil/tx.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "dca.h"
#include "dcaadpcm.h"
#include "dcamath.h"
#include "dca_core.h"
#include "dcadata.h"
#include "dcaenc.h"
#include "encode.h"
#include "put_bits.h"

Go to the source code of this file.

Data Structures
struct	CompressionOptions
struct	DCAEncContext

Macros
#define	MAX_CHANNELS   6
#define	DCA_MAX_FRAME_SIZE   16384
#define	DCA_HEADER_SIZE   13
#define	DCA_LFE_SAMPLES   8
#define	DCAENC_SUBBANDS   32
#define	SUBFRAMES   1
#define	SUBSUBFRAMES   2
#define	SUBBAND_SAMPLES   (SUBFRAMES * SUBSUBFRAMES * 8)
#define	AUBANDS   25
#define	COS_T(x)   (c->cos_table[(x) & 2047])
#define	USED_1ABITS   1
#define	USED_26ABITS   4
#define	DCAENC_FLAGS   AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM

Typedefs
typedef void(*	walk_band_t) (DCAEncContext *c, int band1, int band2, int f, int32_t spectrum1, int32_t spectrum2, int channel, int32_t *arg)

Functions
static double	hom (double f)
static double	gammafilter (int i, double f)
static int	subband_bufer_alloc (DCAEncContext *c)
static void	subband_bufer_free (DCAEncContext *c)
static av_cold void	create_enc_table (uint16_t dst[][2], unsigned count, const uint8_t(**src_tablep)[2])
static av_cold void	dcaenc_init_static_tables (void)
static int	encode_init (AVCodecContext *avctx)
static av_cold int	encode_close (AVCodecContext *avctx)
static void	subband_transform (DCAEncContext *c, const int32_t *input)
static void	lfe_downsample (DCAEncContext *c, const int32_t *input)
static uint32_t	dca_vlc_calc_alloc_bits (const int values[], uint8_t n, uint8_t sel)
static void	dca_vlc_enc_alloc (PutBitContext *pb, const int values[], uint8_t n, uint8_t sel)
static uint32_t	dca_vlc_calc_quant_bits (const int values[], uint8_t n, uint8_t sel, uint8_t table)
static void	dca_vlc_enc_quant (PutBitContext *pb, const int values[], uint8_t n, uint8_t sel, uint8_t table)
static int32_t	get_cb (DCAEncContext *c, int32_t in)
static int32_t	add_cb (DCAEncContext *c, int32_t a, int32_t b)
static void	calc_power (DCAEncContext *c, const int32_t in[2 *256], int32_t power[256])
static void	adjust_jnd (DCAEncContext *c, const int32_t in[512], int32_t out_cb[256])
static void	walk_band_low (DCAEncContext *c, int band, int channel, walk_band_t walk, int32_t *arg)
static void	walk_band_high (DCAEncContext *c, int band, int channel, walk_band_t walk, int32_t *arg)
static void	update_band_masking (DCAEncContext *c, int band1, int band2, int f, int32_t spectrum1, int32_t spectrum2, int channel, int32_t *arg)
static void	calc_masking (DCAEncContext *c, const int32_t *input)
static int32_t	find_peak (DCAEncContext *c, const int32_t *in, int len)
static void	find_peaks (DCAEncContext *c)
static void	adpcm_analysis (DCAEncContext *c)
static int32_t	get_step_size (DCAEncContext *c, int ch, int band)
static int	calc_one_scale (DCAEncContext *c, int32_t peak_cb, int abits, softfloat *quant)
static void	quantize_adpcm_subband (DCAEncContext *c, int ch, int band)
static void	quantize_adpcm (DCAEncContext *c)
static void	quantize_pcm (DCAEncContext *c)
static void	accumulate_huff_bit_consumption (int abits, int32_t *quantized, uint32_t *result)
static uint32_t	set_best_code (uint32_t vlc_bits[DCA_CODE_BOOKS][7], uint32_t clc_bits[DCA_CODE_BOOKS], int32_t res[DCA_CODE_BOOKS])
static uint32_t	set_best_abits_code (int abits[DCAENC_SUBBANDS], int bands, int32_t *res)
static int	init_quantization_noise (DCAEncContext *c, int noise, int forbid_zero)
static void	assign_bits (DCAEncContext *c)
static void	shift_history (DCAEncContext *c, const int32_t *input)
static void	fill_in_adpcm_bufer (DCAEncContext *c)
static void	calc_lfe_scales (DCAEncContext *c)
static void	put_frame_header (DCAEncContext *c)
static void	put_primary_audio_header (DCAEncContext *c)
static void	put_subframe_samples (DCAEncContext *c, int ss, int band, int ch)
static void	put_subframe (DCAEncContext *c, int subframe)
static int	encode_frame (AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)

Variables
static uint16_t	bitalloc_12_table [DCA_BITALLOC_12_COUNT][12+1][2]
static uint16_t	bitalloc_table [DCA_NUM_BITALLOC_CODES][2]
static const uint16_t(*[DCA_CODE_BOOKS][8]	bitalloc_tables )[2]
static const int	snr_fudge = 128
static const AVOption	options []
static const AVClass	dcaenc_class
static const FFCodecDefault	defaults []
const FFCodec	ff_dca_encoder

Macro Definition Documentation

MAX_CHANNELS

#define MAX_CHANNELS   6

Definition at line 43 of file dcaenc.c.

DCA_MAX_FRAME_SIZE

#define DCA_MAX_FRAME_SIZE   16384

Definition at line 44 of file dcaenc.c.

DCA_HEADER_SIZE

#define DCA_HEADER_SIZE   13

Definition at line 45 of file dcaenc.c.

DCA_LFE_SAMPLES

#define DCA_LFE_SAMPLES   8

Definition at line 46 of file dcaenc.c.

DCAENC_SUBBANDS

#define DCAENC_SUBBANDS   32

Definition at line 48 of file dcaenc.c.

SUBFRAMES

#define SUBFRAMES   1

Definition at line 49 of file dcaenc.c.

SUBSUBFRAMES

#define SUBSUBFRAMES   2

Definition at line 50 of file dcaenc.c.

SUBBAND_SAMPLES

#define SUBBAND_SAMPLES   (SUBFRAMES * SUBSUBFRAMES * 8)

Definition at line 51 of file dcaenc.c.

AUBANDS

#define AUBANDS   25

Definition at line 52 of file dcaenc.c.

COS_T

#define COS_T

(

x

)

(c->cos_table[(x) & 2047])

Definition at line 54 of file dcaenc.c.

USED_1ABITS

#define USED_1ABITS   1

Definition at line 675 of file dcaenc.c.

USED_26ABITS

#define USED_26ABITS   4

Definition at line 676 of file dcaenc.c.

DCAENC_FLAGS

#define DCAENC_FLAGS   AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM

Definition at line 1294 of file dcaenc.c.

Typedef Documentation

walk_band_t

typedef void(* walk_band_t) (DCAEncContext *c, int band1, int band2, int f, int32_t spectrum1, int32_t spectrum2, int channel, int32_t *arg)

Definition at line 545 of file dcaenc.c.

Function Documentation

hom()

static double hom ( double  f )

static

Definition at line 113 of file dcaenc.c.

Referenced by encode_init().

gammafilter()

static double gammafilter ( int  i, double  f  )

static

Definition at line 123 of file dcaenc.c.

Referenced by encode_init().

subband_bufer_alloc()

static int subband_bufer_alloc ( DCAEncContext *  c )

static

Definition at line 132 of file dcaenc.c.

Referenced by encode_init().

subband_bufer_free()

static void subband_bufer_free ( DCAEncContext *  c )

static

Definition at line 153 of file dcaenc.c.

Referenced by encode_close().

create_enc_table()

static av_cold void create_enc_table ( uint16_t  dst[][2], unsigned  count, const uint8_t(**)  src_tablep[2]  )

static

Definition at line 167 of file dcaenc.c.

Referenced by dcaenc_init_static_tables().

dcaenc_init_static_tables()

static av_cold void dcaenc_init_static_tables ( void  )

static

Definition at line 184 of file dcaenc.c.

Referenced by encode_init().

encode_init()

static int encode_init ( AVCodecContext *  avctx )

static

Definition at line 202 of file dcaenc.c.

encode_close()

static av_cold int encode_close ( AVCodecContext *  avctx )

static

Definition at line 354 of file dcaenc.c.

subband_transform()

static void subband_transform ( DCAEncContext *  c, const int32_t *  input  )

static

Definition at line 364 of file dcaenc.c.

Referenced by encode_frame().

lfe_downsample()

static void lfe_downsample ( DCAEncContext *  c, const int32_t *  input  )

static

Definition at line 414 of file dcaenc.c.

Referenced by encode_frame().

dca_vlc_calc_alloc_bits()

static uint32_t dca_vlc_calc_alloc_bits ( const int  values[], uint8_t  n, uint8_t  sel  )

static

Definition at line 444 of file dcaenc.c.

Referenced by set_best_abits_code().

dca_vlc_enc_alloc()

static void dca_vlc_enc_alloc ( PutBitContext *  pb, const int  values[], uint8_t  n, uint8_t  sel  )

static

Definition at line 452 of file dcaenc.c.

Referenced by put_subframe().

dca_vlc_calc_quant_bits()

static uint32_t dca_vlc_calc_quant_bits ( const int  values[], uint8_t  n, uint8_t  sel, uint8_t  table  )

static

Definition at line 460 of file dcaenc.c.

Referenced by accumulate_huff_bit_consumption().

dca_vlc_enc_quant()

static void dca_vlc_enc_quant ( PutBitContext *  pb, const int  values[], uint8_t  n, uint8_t  sel, uint8_t  table  )

static

Definition at line 469 of file dcaenc.c.

Referenced by put_subframe_samples().

get_cb()

static int32_t get_cb ( DCAEncContext *  c, int32_t  in  )

static

Definition at line 477 of file dcaenc.c.

Referenced by calc_power(), and find_peak().

add_cb()

static int32_t add_cb ( DCAEncContext *  c, int32_t  a, int32_t  b  )

static

Definition at line 489 of file dcaenc.c.

Referenced by adjust_jnd(), and calc_power().

calc_power()

static void calc_power ( DCAEncContext *  c, const int32_t  in[2 *256], int32_t  power[256]  )

static

Definition at line 499 of file dcaenc.c.

Referenced by adjust_jnd().

adjust_jnd()

static void adjust_jnd ( DCAEncContext *  c, const int32_t  in[512], int32_t  out_cb[256]  )

static

Definition at line 516 of file dcaenc.c.

Referenced by calc_masking().

walk_band_low()

static void walk_band_low ( DCAEncContext *  c, int  band, int  channel, walk_band_t  walk, int32_t *  arg  )

static

Definition at line 549 of file dcaenc.c.

Referenced by calc_masking().

walk_band_high()

static void walk_band_high ( DCAEncContext *  c, int  band, int  channel, walk_band_t  walk, int32_t *  arg  )

static

Definition at line 564 of file dcaenc.c.

Referenced by calc_masking().

update_band_masking()

static void update_band_masking ( DCAEncContext *  c, int  band1, int  band2, int  f, int32_t  spectrum1, int32_t  spectrum2, int  channel, int32_t *  arg  )

static

Definition at line 579 of file dcaenc.c.

Referenced by calc_masking().

calc_masking()

static void calc_masking ( DCAEncContext *  c, const int32_t *  input  )

static

Definition at line 589 of file dcaenc.c.

Referenced by encode_frame().

find_peak()

static int32_t find_peak ( DCAEncContext *  c, const int32_t *  in, int  len  )

inlinestatic

Definition at line 624 of file dcaenc.c.

Referenced by adpcm_analysis(), and find_peaks().

find_peaks()

static void find_peaks ( DCAEncContext *  c )

static

Definition at line 636 of file dcaenc.c.

Referenced by encode_frame().

adpcm_analysis()

static void adpcm_analysis ( DCAEncContext *  c )

static

Definition at line 650 of file dcaenc.c.

Referenced by encode_frame().

get_step_size()

static int32_t get_step_size ( DCAEncContext *  c, int  ch, int  band  )

inlinestatic

Definition at line 678 of file dcaenc.c.

Referenced by fill_in_adpcm_bufer(), and quantize_adpcm_subband().

calc_one_scale()

static int calc_one_scale ( DCAEncContext *  c, int32_t  peak_cb, int  abits, softfloat *  quant  )

static

Definition at line 690 of file dcaenc.c.

Referenced by calc_lfe_scales(), init_quantization_noise(), and quantize_adpcm_subband().

quantize_adpcm_subband()

static void quantize_adpcm_subband ( DCAEncContext *  c, int  ch, int  band  )

inlinestatic

Definition at line 723 of file dcaenc.c.

Referenced by quantize_adpcm().

quantize_adpcm()

static void quantize_adpcm ( DCAEncContext *  c )

static

Definition at line 740 of file dcaenc.c.

Referenced by init_quantization_noise().

quantize_pcm()

static void quantize_pcm ( DCAEncContext *  c )

static

Definition at line 750 of file dcaenc.c.

Referenced by init_quantization_noise().

accumulate_huff_bit_consumption()

static void accumulate_huff_bit_consumption ( int  abits, int32_t *  quantized, uint32_t *  result  )

static

Definition at line 767 of file dcaenc.c.

Referenced by init_quantization_noise().

set_best_code()

static uint32_t set_best_code ( uint32_t  vlc_bits[DCA_CODE_BOOKS][7], uint32_t  clc_bits[DCA_CODE_BOOKS], int32_t  res[DCA_CODE_BOOKS]  )

static

Definition at line 776 of file dcaenc.c.

Referenced by init_quantization_noise().

set_best_abits_code()

static uint32_t set_best_abits_code ( int  abits[DCAENC_SUBBANDS], int  bands, int32_t *  res  )

static

Definition at line 817 of file dcaenc.c.

Referenced by init_quantization_noise().

init_quantization_noise()

static int init_quantization_noise ( DCAEncContext *  c, int  noise, int  forbid_zero  )

static

Definition at line 845 of file dcaenc.c.

Referenced by assign_bits().

assign_bits()

static void assign_bits ( DCAEncContext *  c )

static

Definition at line 924 of file dcaenc.c.

Referenced by encode_frame().

shift_history()

static void shift_history ( DCAEncContext *  c, const int32_t *  input  )

static

Definition at line 966 of file dcaenc.c.

Referenced by encode_frame().

fill_in_adpcm_bufer()

static void fill_in_adpcm_bufer ( DCAEncContext *  c )

static

Definition at line 978 of file dcaenc.c.

Referenced by encode_frame().

calc_lfe_scales()

static void calc_lfe_scales ( DCAEncContext *  c )

static

Definition at line 1014 of file dcaenc.c.

Referenced by encode_frame().

put_frame_header()

static void put_frame_header ( DCAEncContext *  c )

static

Definition at line 1020 of file dcaenc.c.

Referenced by encode_frame().

put_primary_audio_header()

static void put_primary_audio_header ( DCAEncContext *  c )

static

Definition at line 1103 of file dcaenc.c.

Referenced by encode_frame().

put_subframe_samples()

static void put_subframe_samples ( DCAEncContext *  c, int  ss, int  band, int  ch  )

static

Definition at line 1150 of file dcaenc.c.

Referenced by put_subframe().

put_subframe()

static void put_subframe ( DCAEncContext *  c, int  subframe  )

static

Definition at line 1184 of file dcaenc.c.

Referenced by encode_frame().

encode_frame()

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

static

Definition at line 1256 of file dcaenc.c.

Variable Documentation

bitalloc_12_table

uint16_t bitalloc_12_table[DCA_BITALLOC_12_COUNT][12+1][2]

static

Definition at line 162 of file dcaenc.c.

Referenced by dca_vlc_calc_alloc_bits(), dca_vlc_enc_alloc(), and dcaenc_init_static_tables().

bitalloc_table

uint16_t bitalloc_table[DCA_NUM_BITALLOC_CODES][2]

static

Definition at line 164 of file dcaenc.c.

Referenced by dcaenc_init_static_tables().

bitalloc_tables

const uint16_t(*[DCA_CODE_BOOKS][8] bitalloc_tables)[2]

static

Definition at line 165 of file dcaenc.c.

Referenced by dca_vlc_calc_quant_bits(), dca_vlc_enc_quant(), and dcaenc_init_static_tables().

snr_fudge

const int snr_fudge = 128

static

Definition at line 674 of file dcaenc.c.

Referenced by assign_bits().

options

const AVOption options[]

static

Initial value:

= {
    { "dca_adpcm", "Use ADPCM encoding", 0x42, AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DCAENC_FLAGS },
    { NULL },
}

Definition at line 1296 of file dcaenc.c.

dcaenc_class

const AVClass dcaenc_class

static

Initial value:

= {
    .class_name = "DCA (DTS Coherent Acoustics)",
    .item_name = av_default_item_name,
    .option = options,
    .version = LIBAVUTIL_VERSION_INT,
}

Definition at line 1301 of file dcaenc.c.

defaults

const FFCodecDefault defaults[]

static

Initial value:

= {
    { "b",          "1411200" },
    { NULL },
}

Definition at line 1308 of file dcaenc.c.

ff_dca_encoder

const FFCodec ff_dca_encoder

Initial value:

= {
    .p.name                = "dca",
    CODEC_LONG_NAME("DCA (DTS Coherent Acoustics)"),
    .p.type                = AVMEDIA_TYPE_AUDIO,
    .p.id                  = AV_CODEC_ID_DTS,
    .p.capabilities        = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_EXPERIMENTAL |
                             AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
    .priv_data_size        = sizeof(DCAEncContext),
    .init                  = encode_init,
    .close                 = encode_close,
    FF_CODEC_ENCODE_CB(encode_frame),
    .caps_internal         = FF_CODEC_CAP_INIT_CLEANUP,
    .p.sample_fmts         = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S32,
                                                            AV_SAMPLE_FMT_NONE },
    .p.supported_samplerates = sample_rates,
    .p.ch_layouts     = (const AVChannelLayout[]){
        AV_CHANNEL_LAYOUT_MONO,
        AV_CHANNEL_LAYOUT_STEREO,
        AV_CHANNEL_LAYOUT_2_2,
        AV_CHANNEL_LAYOUT_5POINT0,
        AV_CHANNEL_LAYOUT_5POINT1,
        { 0 },
    },
    .defaults              = defaults,
    .p.priv_class          = &dcaenc_class,
}

Definition at line 1313 of file dcaenc.c.