dcaenc.c File Reference

#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/ffmath.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 "internal.h"
#include "mathops.h"
#include "put_bits.h"

Go to the source code of this file.

Data Structures
struct	CompressionOptions
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_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 int32_t	cos_t (int x)
static int32_t	sin_t (int x)
static int32_t	half32 (int32_t a)
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 int32_t	find_peak (const int32_t *in, int len)
static void	find_peaks (DCAEncContext *c)
static void	adpcm_analysis (DCAEncContext *c)
static int32_t	get_step_size (const DCAEncContext *c, int ch, int band)
static int	calc_one_scale (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 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 AVOption	options []
static const AVClass	dcaenc_class
static const AVCodecDefault	defaults []
AVCodec	ff_dca_encoder

Macro Definition Documentation

#define MAX_CHANNELS   6

Definition at line 40 of file dcaenc.c.

Referenced by encode_init(), init_quantization_noise(), and subband_bufer_alloc().

#define DCA_MAX_FRAME_SIZE   16384

Definition at line 41 of file dcaenc.c.

Referenced by encode_init().

#define DCA_HEADER_SIZE   13

Definition at line 42 of file dcaenc.c.

#define DCA_LFE_SAMPLES   8

Definition at line 43 of file dcaenc.c.

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

#define DCAENC_SUBBANDS   32

Definition at line 45 of file dcaenc.c.

Referenced by encode_init(), put_primary_audio_header(), put_subframe(), and subband_bufer_alloc().

#define SUBFRAMES   1

Definition at line 46 of file dcaenc.c.

Referenced by acb_search(), comp_lpc_coeff(), encode_frame(), ff_g723_1_lsp_interpolate(), formant_postfilter(), g723_1_decode_frame(), g723_1_encode_frame(), generate_noise(), pack_bitstream(), perceptual_filter(), put_primary_audio_header(), and unpack_bitstream().

#define SUBSUBFRAMES   2

Definition at line 47 of file dcaenc.c.

Referenced by calc_masking(), and put_subframe().

#define SUBBAND_SAMPLES   (SUBFRAMES * SUBSUBFRAMES * 8)

Definition at line 48 of file dcaenc.c.

Referenced by accumulate_huff_bit_consumption(), adpcm_analysis(), encode_init(), find_peaks(), put_frame_header(), quantize_adpcm_subband(), quantize_pcm(), subband_bufer_alloc(), and subband_transform().

#define AUBANDS   25

Definition at line 49 of file dcaenc.c.

Referenced by adjust_jnd(), and encode_init().

#define USED_1ABITS   1

Definition at line 658 of file dcaenc.c.

Referenced by assign_bits(), and init_quantization_noise().

#define USED_26ABITS   4

Definition at line 659 of file dcaenc.c.

Referenced by assign_bits(), and init_quantization_noise().

#define DCAENC_FLAGS   AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM

Definition at line 1261 of file dcaenc.c.

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 528 of file dcaenc.c.

Function Documentation

static double hom ( double  f )

static

Definition at line 106 of file dcaenc.c.

Referenced by encode_init().

static double gammafilter ( int  i, double  f  )

static

Definition at line 116 of file dcaenc.c.

Referenced by encode_init().

static int subband_bufer_alloc ( DCAEncContext *  c )

static

Definition at line 125 of file dcaenc.c.

Referenced by encode_init().

static void subband_bufer_free ( DCAEncContext *  c )

static

Definition at line 146 of file dcaenc.c.

Referenced by encode_close().

static int encode_init ( AVCodecContext *  avctx )

static

Definition at line 152 of file dcaenc.c.

static av_cold int encode_close ( AVCodecContext *  avctx )

static

Definition at line 296 of file dcaenc.c.

static int32_t cos_t ( int  x )

inlinestatic

Definition at line 306 of file dcaenc.c.

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

static int32_t sin_t ( int  x )

inlinestatic

Definition at line 311 of file dcaenc.c.

Referenced by fft().

static int32_t half32 ( int32_t  a )

inlinestatic

Definition at line 316 of file dcaenc.c.

Referenced by fft().

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

static

Definition at line 321 of file dcaenc.c.

Referenced by encode_frame().

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

static

Definition at line 371 of file dcaenc.c.

Referenced by encode_frame().

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

static

Definition at line 406 of file dcaenc.c.

Referenced by adjust_jnd(), headphone_fast_convolute(), and sofalizer_fast_convolute().

static int32_t get_cb ( int32_t  in )

static

Definition at line 473 of file dcaenc.c.

Referenced by adjust_jnd(), and find_peak().

static int32_t add_cb ( int32_t  a, int32_t  b  )

static

Definition at line 487 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 497 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 532 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 547 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 562 of file dcaenc.c.

Referenced by calc_masking().

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

static

Definition at line 572 of file dcaenc.c.

Referenced by encode_frame().

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

inlinestatic

Definition at line 607 of file dcaenc.c.

Referenced by adpcm_analysis(), and find_peaks().

static void find_peaks ( DCAEncContext *  c )

static

Definition at line 619 of file dcaenc.c.

Referenced by encode_frame().

static void adpcm_analysis ( DCAEncContext *  c )

static

Definition at line 634 of file dcaenc.c.

Referenced by encode_frame().

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

inlinestatic

Definition at line 661 of file dcaenc.c.

Referenced by fill_in_adpcm_bufer(), and quantize_adpcm_subband().

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

static

Definition at line 673 of file dcaenc.c.

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

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

inlinestatic

Definition at line 705 of file dcaenc.c.

Referenced by quantize_adpcm().

static void quantize_adpcm ( DCAEncContext *  c )

static

Definition at line 720 of file dcaenc.c.

Referenced by init_quantization_noise().

static void quantize_pcm ( DCAEncContext *  c )

static

Definition at line 730 of file dcaenc.c.

Referenced by init_quantization_noise().

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

static

Definition at line 741 of file dcaenc.c.

Referenced by init_quantization_noise().

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 748 of file dcaenc.c.

Referenced by init_quantization_noise().

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

static

Definition at line 787 of file dcaenc.c.

Referenced by init_quantization_noise().

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

static

Definition at line 814 of file dcaenc.c.

Referenced by assign_bits().

static void assign_bits ( DCAEncContext *  c )

static

Definition at line 888 of file dcaenc.c.

Referenced by encode_frame().

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

static

Definition at line 930 of file dcaenc.c.

Referenced by encode_frame().

static void fill_in_adpcm_bufer ( DCAEncContext *  c )

static

Definition at line 942 of file dcaenc.c.

Referenced by encode_frame().

static void calc_lfe_scales ( DCAEncContext *  c )

static

Definition at line 977 of file dcaenc.c.

Referenced by encode_frame().

static void put_frame_header ( DCAEncContext *  c )

static

Definition at line 983 of file dcaenc.c.

Referenced by encode_frame().

static void put_primary_audio_header ( DCAEncContext *  c )

static

Definition at line 1066 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 1113 of file dcaenc.c.

Referenced by put_subframe().

static void put_subframe ( DCAEncContext *  c, int  subframe  )

static

Definition at line 1146 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 1217 of file dcaenc.c.

Variable Documentation

int32_t cos_table[2048]

static

Definition at line 97 of file dcaenc.c.

Referenced by cos_t(), and encode_init().

int32_t band_interpolation[2][512]

static

Definition at line 98 of file dcaenc.c.

Referenced by encode_init().

int32_t band_spectrum[2][8]

static

Definition at line 99 of file dcaenc.c.

Referenced by encode_init().

int32_t auf[9][AUBANDS][256]

static

Definition at line 100 of file dcaenc.c.

Referenced by adjust_jnd(), and encode_init().

int32_t cb_to_add[256]

static

Definition at line 101 of file dcaenc.c.

Referenced by add_cb(), and encode_init().

int32_t cb_to_level[2048]

static

Definition at line 102 of file dcaenc.c.

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

int32_t lfe_fir_64i[512]

static

Definition at line 103 of file dcaenc.c.

Referenced by encode_init(), and lfe_downsample().

const int snr_fudge = 128

static

Definition at line 657 of file dcaenc.c.

Referenced by assign_bits().

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 1263 of file dcaenc.c.

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 1268 of file dcaenc.c.

const AVCodecDefault defaults[]

static

Initial value:

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

Definition at line 1275 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,
    .close                 = encode_close,
    .encode2               = encode_frame,
    .capabilities          = AV_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,
    .priv_class            = &dcaenc_class,
}

Definition at line 1280 of file dcaenc.c.