#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 "put_bits.h"

Data Structures
struct	DCAContext

struct	cplx32

Macros
#define	MAX_CHANNELS 6

#define	DCA_MAX_FRAME_SIZE 16384

#define	DCA_HEADER_SIZE 13

#define	DCA_LFE_SAMPLES 8

#define	DCA_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 )(DCAContext 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 (DCAContext c, const int32_t input)

static void	lfe_downsample (DCAContext 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 (DCAContext c, int band, int channel, walk_band_t walk, int32_t arg)

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

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

static void	calc_masking (DCAContext c, const int32_t input)

static void	find_peaks (DCAContext *c)

static int	init_quantization_noise (DCAContext *c, int noise)

static void	assign_bits (DCAContext *c)

static void	shift_history (DCAContext 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 (DCAContext *c)

static void	quantize_all (DCAContext *c)

static void	put_frame_header (DCAContext *c)

static void	put_primary_audio_header (DCAContext *c)

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

static void	put_subframe (DCAContext *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 34 of file dcaenc.c.

#define DCA_MAX_FRAME_SIZE 16384

Definition at line 35 of file dcaenc.c.

Referenced by encode_init().

#define DCA_HEADER_SIZE 13

Definition at line 36 of file dcaenc.c.

#define DCA_LFE_SAMPLES 8

Definition at line 37 of file dcaenc.c.

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

#define DCA_SUBBANDS 32

Definition at line 39 of file dcaenc.c.

Referenced by put_primary_audio_header(), and put_subframe().

#define SUBFRAMES 1

Definition at line 40 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 41 of file dcaenc.c.

Referenced by calc_masking(), and put_subframe().

#define SUBBAND_SAMPLES (SUBFRAMES * SUBSUBFRAMES * 8)

Definition at line 42 of file dcaenc.c.

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

#define AUBANDS 25

Definition at line 43 of file dcaenc.c.

Referenced by adjust_jnd(), and encode_init().

#define USED_1ABITS 1

Definition at line 550 of file dcaenc.c.

Referenced by assign_bits(), and init_quantization_noise().

#define USED_NABITS 2

Definition at line 551 of file dcaenc.c.

Referenced by init_quantization_noise().

#define USED_26ABITS 4

Definition at line 552 of file dcaenc.c.

Referenced by assign_bits(), and init_quantization_noise().

Typedef Documentation

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

Definition at line 444 of file dcaenc.c.

Function Documentation

static double hom ( double f )

static

Definition at line 86 of file dcaenc.c.

Referenced by encode_init().

static double gammafilter	(	int	i,
		double	f
	)

static

Definition at line 96 of file dcaenc.c.

Referenced by encode_init().

static int encode_init ( AVCodecContext * avctx )

static

Definition at line 105 of file dcaenc.c.

static int32_t cos_t ( int x )

inlinestatic

Definition at line 216 of file dcaenc.c.

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

static int32_t sin_t ( int x )

inlinestatic

Definition at line 221 of file dcaenc.c.

Referenced by fft().

static int32_t half32 ( int32_t a )

inlinestatic

Definition at line 226 of file dcaenc.c.

Referenced by fft().

static int32_t mul32	(	int32_t	a,
		int32_t	b
	)

inlinestatic

Definition at line 231 of file dcaenc.c.

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

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

static

Definition at line 237 of file dcaenc.c.

Referenced by encode_frame().

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

static

Definition at line 287 of file dcaenc.c.

Referenced by encode_frame().

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

static

Definition at line 322 of file dcaenc.c.

Referenced by adjust_jnd().

static int32_t get_cb ( int32_t in )

static

Definition at line 389 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 403 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 413 of file dcaenc.c.

Referenced by calc_masking().

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

static

Definition at line 448 of file dcaenc.c.

Referenced by calc_masking().

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

static

Definition at line 463 of file dcaenc.c.

Referenced by calc_masking().

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

static

Definition at line 478 of file dcaenc.c.

Referenced by calc_masking().

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

static

Definition at line 488 of file dcaenc.c.

Referenced by encode_frame().

static void find_peaks ( DCAContext * c )

static

Definition at line 521 of file dcaenc.c.

Referenced by encode_frame().

static int init_quantization_noise	(	DCAContext *	c,
		int	noise
	)

static

Definition at line 554 of file dcaenc.c.

Referenced by assign_bits().

static void assign_bits ( DCAContext * c )

static

Definition at line 591 of file dcaenc.c.

Referenced by encode_frame().

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

static

Definition at line 629 of file dcaenc.c.

Referenced by encode_frame().

static int32_t quantize_value	(	int32_t	value,
		softfloat	quant
	)

static

Definition at line 638 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 647 of file dcaenc.c.

Referenced by calc_scales().

static void calc_scales ( DCAContext * c )

static

Definition at line 679 of file dcaenc.c.

Referenced by encode_frame().

static void quantize_all ( DCAContext * c )

static

Definition at line 693 of file dcaenc.c.

Referenced by encode_frame().

static void put_frame_header ( DCAContext * c )

static

Definition at line 703 of file dcaenc.c.

Referenced by encode_frame().

static void put_primary_audio_header ( DCAContext * c )

static

Definition at line 786 of file dcaenc.c.

Referenced by encode_frame().

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

static

Definition at line 832 of file dcaenc.c.

Referenced by put_subframe().

static void put_subframe	(	DCAContext *	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 77 of file dcaenc.c.

Referenced by cos_t(), and encode_init().

int32_t band_interpolation[2][512]

static

Definition at line 78 of file dcaenc.c.

Referenced by encode_init().

int32_t band_spectrum[2][8]

static

Definition at line 79 of file dcaenc.c.

Referenced by encode_init().

int32_t auf[9][AUBANDS][256]

static

Definition at line 80 of file dcaenc.c.

Referenced by adjust_jnd(), and encode_init().

int32_t cb_to_add[256]

static

Definition at line 81 of file dcaenc.c.

Referenced by add_cb(), and encode_init().

int32_t cb_to_level[2048]

static

Definition at line 82 of file dcaenc.c.

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

int32_t lfe_fir_64i[512]

static

Definition at line 83 of file dcaenc.c.

Referenced by encode_init(), and lfe_downsample().

const int snr_fudge = 128

static

Definition at line 549 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(DCAContext),
    .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.

Data Structures

Macros

Typedefs

Functions

Variables

Macro Definition Documentation

Typedef Documentation

Function Documentation

Variable Documentation