#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 "avcodec.h"
#include "dca.h"
#include "dcaadpcm.h"
#include "dcamath.h"
#include "dca_core.h"
#include "dcadata.h"
#include "dcaenc.h"
#include "encode.h"
#include "fft.h"
#include "internal.h"
#include "mathops.h"
#include "put_bits.h"

Data Structures
struct	CompressionOptions

struct	DCAEncContext

Macros
#define	FFT_FLOAT 0

#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 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 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 const int	snr_fudge = 128

static const AVOption	options []

static const AVClass	dcaenc_class

static const AVCodecDefault	defaults []

const AVCodec	ff_dca_encoder

Macro Definition Documentation

◆ FFT_FLOAT

#define FFT_FLOAT 0

Definition at line 24 of file dcaenc.c.

◆ MAX_CHANNELS

#define MAX_CHANNELS 6

Definition at line 45 of file dcaenc.c.

◆ DCA_MAX_FRAME_SIZE

#define DCA_MAX_FRAME_SIZE 16384

Definition at line 46 of file dcaenc.c.

◆ DCA_HEADER_SIZE

#define DCA_HEADER_SIZE 13

Definition at line 47 of file dcaenc.c.

◆ DCA_LFE_SAMPLES

#define DCA_LFE_SAMPLES 8

Definition at line 48 of file dcaenc.c.

◆ DCAENC_SUBBANDS

#define DCAENC_SUBBANDS 32

Definition at line 50 of file dcaenc.c.

◆ SUBFRAMES

#define SUBFRAMES 1

Definition at line 51 of file dcaenc.c.

◆ SUBSUBFRAMES

#define SUBSUBFRAMES 2

Definition at line 52 of file dcaenc.c.

◆ SUBBAND_SAMPLES

#define SUBBAND_SAMPLES (SUBFRAMES * SUBSUBFRAMES * 8)

Definition at line 53 of file dcaenc.c.

◆ AUBANDS

#define AUBANDS 25

Definition at line 54 of file dcaenc.c.

◆ COS_T

#define COS_T ( x ) (c->cos_table[(x) & 2047])

Definition at line 56 of file dcaenc.c.

◆ USED_1ABITS

#define USED_1ABITS 1

Definition at line 597 of file dcaenc.c.

◆ USED_26ABITS

#define USED_26ABITS 4

Definition at line 598 of file dcaenc.c.

◆ DCAENC_FLAGS

#define DCAENC_FLAGS AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM

Definition at line 1218 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 467 of file dcaenc.c.

Function Documentation

◆ hom()

static double hom ( double f )

static

Definition at line 114 of file dcaenc.c.

Referenced by encode_init().

◆ gammafilter()

static double gammafilter	(	int	i,
		double	f
	)

static

Definition at line 124 of file dcaenc.c.

Referenced by encode_init().

◆ subband_bufer_alloc()

static int subband_bufer_alloc ( DCAEncContext * c )

static

Definition at line 133 of file dcaenc.c.

Referenced by encode_init().

◆ subband_bufer_free()

static void subband_bufer_free ( DCAEncContext * c )

static

Definition at line 154 of file dcaenc.c.

Referenced by encode_close().

◆ encode_init()

static int encode_init ( AVCodecContext * avctx )

static

Definition at line 163 of file dcaenc.c.

◆ encode_close()

static av_cold int encode_close ( AVCodecContext * avctx )

static

Definition at line 309 of file dcaenc.c.

◆ subband_transform()

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

static

Definition at line 319 of file dcaenc.c.

Referenced by encode_frame().

◆ lfe_downsample()

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

static

Definition at line 369 of file dcaenc.c.

Referenced by encode_frame().

◆ get_cb()

static int32_t get_cb	(	DCAEncContext *	c,
		int32_t	in
	)

static

Definition at line 399 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 411 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 421 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 438 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 471 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 486 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 501 of file dcaenc.c.

Referenced by calc_masking().

◆ calc_masking()

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

static

Definition at line 511 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 546 of file dcaenc.c.

Referenced by adpcm_analysis(), and find_peaks().

◆ find_peaks()

static void find_peaks ( DCAEncContext * c )

static

Definition at line 558 of file dcaenc.c.

Referenced by encode_frame().

◆ adpcm_analysis()

static void adpcm_analysis ( DCAEncContext * c )

static

Definition at line 572 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 600 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 612 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 645 of file dcaenc.c.

Referenced by quantize_adpcm().

◆ quantize_adpcm()

static void quantize_adpcm ( DCAEncContext * c )

static

Definition at line 662 of file dcaenc.c.

Referenced by init_quantization_noise().

◆ quantize_pcm()

static void quantize_pcm ( DCAEncContext * c )

static

Definition at line 672 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 689 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 698 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 739 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 767 of file dcaenc.c.

Referenced by assign_bits().

◆ assign_bits()

static void assign_bits ( DCAEncContext * c )

static

Definition at line 846 of file dcaenc.c.

Referenced by encode_frame().

◆ shift_history()

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

static

Definition at line 888 of file dcaenc.c.

Referenced by encode_frame().

◆ fill_in_adpcm_bufer()

static void fill_in_adpcm_bufer ( DCAEncContext * c )

static

Definition at line 900 of file dcaenc.c.

Referenced by encode_frame().

◆ calc_lfe_scales()

static void calc_lfe_scales ( DCAEncContext * c )

static

Definition at line 936 of file dcaenc.c.

Referenced by encode_frame().

◆ put_frame_header()

static void put_frame_header ( DCAEncContext * c )

static

Definition at line 942 of file dcaenc.c.

Referenced by encode_frame().

◆ put_primary_audio_header()

static void put_primary_audio_header ( DCAEncContext * c )

static

Definition at line 1025 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 1072 of file dcaenc.c.

Referenced by put_subframe().

◆ put_subframe()

static void put_subframe	(	DCAEncContext *	c,
		int	subframe
	)

static

Definition at line 1106 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 1178 of file dcaenc.c.

Variable Documentation

◆ snr_fudge

const int snr_fudge = 128

static

Definition at line 596 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 1220 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 1225 of file dcaenc.c.

◆ defaults

const AVCodecDefault defaults[]

static

Initial value:

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

Definition at line 1232 of file dcaenc.c.

◆ ff_dca_encoder

const 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,
    .capabilities          = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_EXPERIMENTAL,
    .priv_data_size        = sizeof(DCAEncContext),
    .init                  = encode_init,
    .close                 = encode_close,
    .encode2               = encode_frame,
    .caps_internal         = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
    .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,
    .priv_class            = &dcaenc_class,
}

Definition at line 1237 of file dcaenc.c.

Data Structures

Macros

Typedefs

Functions

Variables

Macro Definition Documentation

◆ FFT_FLOAT

◆ MAX_CHANNELS

◆ DCA_MAX_FRAME_SIZE

◆ DCA_HEADER_SIZE

◆ DCA_LFE_SAMPLES

◆ DCAENC_SUBBANDS

◆ SUBFRAMES

◆ SUBSUBFRAMES

◆ SUBBAND_SAMPLES

◆ AUBANDS

◆ COS_T

◆ USED_1ABITS

◆ USED_26ABITS

◆ DCAENC_FLAGS

Typedef Documentation

◆ walk_band_t

Function Documentation

◆ hom()

◆ gammafilter()

◆ subband_bufer_alloc()

◆ subband_bufer_free()

◆ encode_init()

◆ encode_close()

◆ subband_transform()

◆ lfe_downsample()

◆ get_cb()

◆ add_cb()

◆ calc_power()

◆ adjust_jnd()

◆ walk_band_low()

◆ walk_band_high()

◆ update_band_masking()

◆ calc_masking()

◆ find_peak()

◆ find_peaks()

◆ adpcm_analysis()

◆ get_step_size()

◆ calc_one_scale()

◆ quantize_adpcm_subband()

◆ quantize_adpcm()

◆ quantize_pcm()

◆ accumulate_huff_bit_consumption()

◆ set_best_code()

◆ set_best_abits_code()

◆ init_quantization_noise()

◆ assign_bits()

◆ shift_history()

◆ fill_in_adpcm_bufer()

◆ calc_lfe_scales()

◆ put_frame_header()

◆ put_primary_audio_header()

◆ put_subframe_samples()

◆ put_subframe()

◆ encode_frame()

Variable Documentation

◆ snr_fudge

◆ options

◆ dcaenc_class

◆ defaults

◆ ff_dca_encoder