dcaenc.c File Reference

#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "avcodec.h"
#include "dca.h"
#include "dcadata.h"
#include "dcaenc.h"
#include "internal.h"
#include "mathops.h"
#include "put_bits.h"

Go to the source code of this file.

Data Structures
struct	DCAEncContext
struct	cplx32

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	USED_1ABITS   1
#define	USED_NABITS   2
#define	USED_26ABITS   4

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	encode_init (AVCodecContext *avctx)
static int32_t	cos_t (int x)
static int32_t	sin_t (int x)
static int32_t	half32 (int32_t a)
static int32_t	mul32 (int32_t a, int32_t b)
static void	subband_transform (DCAEncContext *c, const int32_t *input)
static void	lfe_downsample (DCAEncContext *c, const int32_t *input)
static void	fft (const int32_t in[2 *256], cplx32 out[256])
static int32_t	get_cb (int32_t in)
static int32_t	add_cb (int32_t a, int32_t b)
static void	adjust_jnd (int samplerate_index, 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 void	find_peaks (DCAEncContext *c)
static int	init_quantization_noise (DCAEncContext *c, int noise)
static void	assign_bits (DCAEncContext *c)
static void	shift_history (DCAEncContext *c, const int32_t *input)
static int32_t	quantize_value (int32_t value, softfloat quant)
static int	calc_one_scale (int32_t peak_cb, int abits, softfloat *quant)
static void	calc_scales (DCAEncContext *c)
static void	quantize_all (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 int32_t	cos_table [2048]
static int32_t	band_interpolation [2][512]
static int32_t	band_spectrum [2][8]
static int32_t	auf [9][AUBANDS][256]
static int32_t	cb_to_add [256]
static int32_t	cb_to_level [2048]
static int32_t	lfe_fir_64i [512]
static const int	snr_fudge = 128
static const AVCodecDefault	defaults []
AVCodec	ff_dca_encoder

Macro Definition Documentation

#define MAX_CHANNELS   6

Definition at line 35 of file dcaenc.c.

#define DCA_MAX_FRAME_SIZE   16384

Definition at line 36 of file dcaenc.c.

Referenced by encode_init().

#define DCA_HEADER_SIZE   13

Definition at line 37 of file dcaenc.c.

#define DCA_LFE_SAMPLES   8

Definition at line 38 of file dcaenc.c.

Referenced by find_peaks(), lfe_downsample(), and put_subframe().

#define DCAENC_SUBBANDS   32

Definition at line 40 of file dcaenc.c.

Referenced by put_primary_audio_header(), and put_subframe().

#define SUBFRAMES   1

Definition at line 41 of file dcaenc.c.

Referenced by encode_frame(), formant_postfilter(), g723_1_decode_frame(), generate_noise(), lsp_interpolate(), put_primary_audio_header(), and unpack_bitstream().

#define SUBSUBFRAMES   2

Definition at line 42 of file dcaenc.c.

Referenced by calc_masking(), and put_subframe().

#define SUBBAND_SAMPLES   (SUBFRAMES * SUBSUBFRAMES * 8)

Definition at line 43 of file dcaenc.c.

Referenced by encode_init(), find_peaks(), put_frame_header(), quantize_all(), and subband_transform().

#define AUBANDS   25

Definition at line 44 of file dcaenc.c.

Referenced by adjust_jnd(), and encode_init().

#define USED_1ABITS   1

Definition at line 551 of file dcaenc.c.

Referenced by assign_bits(), and init_quantization_noise().

#define USED_NABITS   2

Definition at line 552 of file dcaenc.c.

Referenced by init_quantization_noise().

#define USED_26ABITS   4

Definition at line 553 of file dcaenc.c.

Referenced by assign_bits(), and init_quantization_noise().

Typedef Documentation

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 445 of file dcaenc.c.

Function Documentation

static double hom ( double  f )

static

Definition at line 87 of file dcaenc.c.

Referenced by encode_init().

static double gammafilter ( int  i, double  f  )

static

Definition at line 97 of file dcaenc.c.

Referenced by encode_init().

static int encode_init ( AVCodecContext *  avctx )

static

Definition at line 106 of file dcaenc.c.

static int32_t cos_t ( int  x )

inlinestatic

Definition at line 217 of file dcaenc.c.

Referenced by fft(), sin_t(), and subband_transform().

static int32_t sin_t ( int  x )

inlinestatic

Definition at line 222 of file dcaenc.c.

Referenced by fft().

static int32_t half32 ( int32_t  a )

inlinestatic

Definition at line 227 of file dcaenc.c.

Referenced by fft().

static int32_t mul32 ( int32_t  a, int32_t  b  )

inlinestatic

Definition at line 232 of file dcaenc.c.

Referenced by calc_one_scale(), fft(), init_quantization_noise(), lfe_downsample(), quantize_value(), and subband_transform().

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

static

Definition at line 238 of file dcaenc.c.

Referenced by encode_frame().

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

static

Definition at line 288 of file dcaenc.c.

Referenced by encode_frame().

static void fft ( const int32_t  in[2 *256], cplx32  out[256]  )

static

Definition at line 323 of file dcaenc.c.

Referenced by adjust_jnd().

static int32_t get_cb ( int32_t  in )

static

Definition at line 390 of file dcaenc.c.

Referenced by adjust_jnd(), and find_peaks().

static int32_t add_cb ( int32_t  a, int32_t  b  )

static

Definition at line 404 of file dcaenc.c.

Referenced by adjust_jnd().

static void adjust_jnd ( int  samplerate_index, const int32_t  in[512], int32_t  out_cb[256]  )

static

Definition at line 414 of file dcaenc.c.

Referenced by calc_masking().

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

static

Definition at line 449 of file dcaenc.c.

Referenced by calc_masking().

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

static

Definition at line 464 of file dcaenc.c.

Referenced by calc_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 479 of file dcaenc.c.

Referenced by calc_masking().

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

static

Definition at line 489 of file dcaenc.c.

Referenced by encode_frame().

static void find_peaks ( DCAEncContext *  c )

static

Definition at line 522 of file dcaenc.c.

Referenced by encode_frame().

static int init_quantization_noise ( DCAEncContext *  c, int  noise  )

static

Definition at line 555 of file dcaenc.c.

Referenced by assign_bits().

static void assign_bits ( DCAEncContext *  c )

static

Definition at line 592 of file dcaenc.c.

Referenced by encode_frame().

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

static

Definition at line 630 of file dcaenc.c.

Referenced by encode_frame().

static int32_t quantize_value ( int32_t  value, softfloat  quant  )

static

Definition at line 639 of file dcaenc.c.

Referenced by calc_one_scale(), put_subframe(), and quantize_all().

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

static

Definition at line 648 of file dcaenc.c.

Referenced by calc_scales().

static void calc_scales ( DCAEncContext *  c )

static

Definition at line 680 of file dcaenc.c.

Referenced by encode_frame().

static void quantize_all ( DCAEncContext *  c )

static

Definition at line 694 of file dcaenc.c.

Referenced by encode_frame().

static void put_frame_header ( DCAEncContext *  c )

static

Definition at line 704 of file dcaenc.c.

Referenced by encode_frame().

static void put_primary_audio_header ( DCAEncContext *  c )

static

Definition at line 787 of file dcaenc.c.

Referenced by encode_frame().

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

static

Definition at line 833 of file dcaenc.c.

Referenced by put_subframe().

static void put_subframe ( DCAEncContext *  c, int  subframe  )

static

Definition at line 855 of file dcaenc.c.

Referenced by encode_frame().

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

static

Definition at line 912 of file dcaenc.c.

Variable Documentation

int32_t cos_table[2048]

static

Definition at line 78 of file dcaenc.c.

Referenced by cos_t(), and encode_init().

int32_t band_interpolation[2][512]

static

Definition at line 79 of file dcaenc.c.

Referenced by encode_init().

int32_t band_spectrum[2][8]

static

Definition at line 80 of file dcaenc.c.

Referenced by encode_init().

int32_t auf[9][AUBANDS][256]

static

Definition at line 81 of file dcaenc.c.

Referenced by adjust_jnd(), and encode_init().

int32_t cb_to_add[256]

static

Definition at line 82 of file dcaenc.c.

Referenced by add_cb(), and encode_init().

int32_t cb_to_level[2048]

static

Definition at line 83 of file dcaenc.c.

Referenced by calc_one_scale(), encode_init(), and get_cb().

int32_t lfe_fir_64i[512]

static

Definition at line 84 of file dcaenc.c.

Referenced by encode_init(), and lfe_downsample().

const int snr_fudge = 128

static

Definition at line 550 of file dcaenc.c.

Referenced by assign_bits().

const AVCodecDefault defaults[]

static

Initial value:

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

Definition at line 950 of file dcaenc.c.

AVCodec ff_dca_encoder

Initial value:

= {
    .name                  = "dca",
    .long_name             = NULL_IF_CONFIG_SMALL("DCA (DTS Coherent Acoustics)"),
    .type                  = AVMEDIA_TYPE_AUDIO,
    .id                    = AV_CODEC_ID_DTS,
    .priv_data_size        = sizeof(DCAEncContext),
    .init                  = encode_init,
    .encode2               = encode_frame,
    .capabilities          = CODEC_CAP_EXPERIMENTAL,
    .sample_fmts           = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S32,
                                                            AV_SAMPLE_FMT_NONE },
    .supported_samplerates = sample_rates,
    .channel_layouts       = (const uint64_t[]) { AV_CH_LAYOUT_MONO,
                                                  AV_CH_LAYOUT_STEREO,
                                                  AV_CH_LAYOUT_2_2,
                                                  AV_CH_LAYOUT_5POINT0,
                                                  AV_CH_LAYOUT_5POINT1,
                                                  0 },
    .defaults              = defaults,
}

Definition at line 955 of file dcaenc.c.