FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
Data Structures | Macros | Typedefs | Functions | Variables
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 "fft.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
 

Macros

#define FFT_FLOAT   0
 
#define FFT_FIXED_32   1
 
#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 []
 
AVCodec ff_dca_encoder
 

Macro Definition Documentation

#define FFT_FLOAT   0

Definition at line 24 of file dcaenc.c.

#define FFT_FIXED_32   1

Definition at line 25 of file dcaenc.c.

#define MAX_CHANNELS   6

Definition at line 44 of file dcaenc.c.

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

#define DCA_MAX_FRAME_SIZE   16384

Definition at line 45 of file dcaenc.c.

Referenced by encode_init().

#define DCA_HEADER_SIZE   13

Definition at line 46 of file dcaenc.c.

#define DCA_LFE_SAMPLES   8

Definition at line 47 of file dcaenc.c.

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

#define DCAENC_SUBBANDS   32

Definition at line 49 of file dcaenc.c.

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

#define SUBFRAMES   1

Definition at line 50 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 51 of file dcaenc.c.

Referenced by calc_masking(), and put_subframe().

#define SUBBAND_SAMPLES   (SUBFRAMES * SUBSUBFRAMES * 8)

Definition at line 52 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 53 of file dcaenc.c.

Referenced by adjust_jnd(), and encode_init().

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

Definition at line 55 of file dcaenc.c.

Referenced by calc_power(), and subband_transform().

#define USED_1ABITS   1

Definition at line 593 of file dcaenc.c.

Referenced by assign_bits(), and init_quantization_noise().

#define USED_26ABITS   4

Definition at line 594 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 1218 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 463 of file dcaenc.c.

Function Documentation

static double hom ( double  f)
static

Definition at line 113 of file dcaenc.c.

Referenced by encode_init().

static double gammafilter ( int  i,
double  f 
)
static

Definition at line 123 of file dcaenc.c.

Referenced by encode_init().

static int subband_bufer_alloc ( DCAEncContext *  c)
static

Definition at line 132 of file dcaenc.c.

Referenced by encode_init().

static void subband_bufer_free ( DCAEncContext *  c)
static

Definition at line 153 of file dcaenc.c.

Referenced by encode_close().

static int encode_init ( AVCodecContext *  avctx)
static

Definition at line 159 of file dcaenc.c.

static av_cold int encode_close ( AVCodecContext *  avctx)
static

Definition at line 305 of file dcaenc.c.

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

Definition at line 315 of file dcaenc.c.

Referenced by encode_frame().

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

Definition at line 365 of file dcaenc.c.

Referenced by encode_frame().

static int32_t get_cb ( DCAEncContext *  c,
int32_t  in 
)
static

Definition at line 395 of file dcaenc.c.

Referenced by calc_power(), and find_peak().

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

Definition at line 407 of file dcaenc.c.

Referenced by adjust_jnd(), and calc_power().

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

Definition at line 417 of file dcaenc.c.

Referenced by adjust_jnd().

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

Definition at line 434 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 467 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 482 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 497 of file dcaenc.c.

Referenced by calc_masking().

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

Definition at line 507 of file dcaenc.c.

Referenced by encode_frame().

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

Definition at line 542 of file dcaenc.c.

Referenced by adpcm_analysis(), and find_peaks().

static void find_peaks ( DCAEncContext *  c)
static

Definition at line 554 of file dcaenc.c.

Referenced by encode_frame().

static void adpcm_analysis ( DCAEncContext *  c)
static

Definition at line 568 of file dcaenc.c.

Referenced by encode_frame().

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

Definition at line 596 of file dcaenc.c.

Referenced by fill_in_adpcm_bufer(), and quantize_adpcm_subband().

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

Definition at line 608 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 641 of file dcaenc.c.

Referenced by quantize_adpcm().

static void quantize_adpcm ( DCAEncContext *  c)
static

Definition at line 658 of file dcaenc.c.

Referenced by init_quantization_noise().

static void quantize_pcm ( DCAEncContext *  c)
static

Definition at line 668 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 685 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 694 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 735 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 763 of file dcaenc.c.

Referenced by assign_bits().

static void assign_bits ( DCAEncContext *  c)
static

Definition at line 842 of file dcaenc.c.

Referenced by encode_frame().

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

Definition at line 884 of file dcaenc.c.

Referenced by encode_frame().

static void fill_in_adpcm_bufer ( DCAEncContext *  c)
static

Definition at line 896 of file dcaenc.c.

Referenced by encode_frame().

static void calc_lfe_scales ( DCAEncContext *  c)
static

Definition at line 932 of file dcaenc.c.

Referenced by encode_frame().

static void put_frame_header ( DCAEncContext *  c)
static

Definition at line 938 of file dcaenc.c.

Referenced by encode_frame().

static void put_primary_audio_header ( DCAEncContext *  c)
static

Definition at line 1021 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 1068 of file dcaenc.c.

Referenced by put_subframe().

static void put_subframe ( DCAEncContext *  c,
int  subframe 
)
static

Definition at line 1102 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 1174 of file dcaenc.c.

Variable Documentation

const int snr_fudge = 128
static

Definition at line 592 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 },
}
NULL
#define NULL
Definition: coverity.c:32
AV_OPT_TYPE_BOOL
Definition: opt.h:240
DCAENC_FLAGS
#define DCAENC_FLAGS
Definition: dcaenc.c:1218

Definition at line 1220 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,
}
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
options
static const AVOption options[]
Definition: dcaenc.c:1220

Definition at line 1225 of file dcaenc.c.

const AVCodecDefault defaults[]
static
Initial value:
= {
{ "b", "1411200" },
{ NULL },
}
NULL
#define NULL
Definition: coverity.c:32

Definition at line 1232 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,
.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,
}
FF_CODEC_CAP_INIT_CLEANUP
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:48
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
AV_CODEC_CAP_EXPERIMENTAL
#define AV_CODEC_CAP_EXPERIMENTAL
Codec is experimental and is thus avoided in favor of non experimental encoders.
Definition: avcodec.h:1007
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:86
encode_frame
static int encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Definition: dcaenc.c:1174
AV_CH_LAYOUT_5POINT0
#define AV_CH_LAYOUT_5POINT0
Definition: channel_layout.h:95
encode_close
static av_cold int encode_close(AVCodecContext *avctx)
Definition: dcaenc.c:305
FF_CODEC_CAP_INIT_THREADSAFE
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:40
AV_SAMPLE_FMT_S32
signed 32 bits
Definition: samplefmt.h:62
AV_CH_LAYOUT_5POINT1
#define AV_CH_LAYOUT_5POINT1
Definition: channel_layout.h:96
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
AV_CODEC_ID_DTS
Definition: avcodec.h:555
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_CH_LAYOUT_2_2
#define AV_CH_LAYOUT_2_2
Definition: channel_layout.h:93
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
encode_init
static int encode_init(AVCodecContext *avctx)
Definition: dcaenc.c:159
sample_rates
sample_rates
Definition: ffmpeg_filter.c:190
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
defaults
static const AVCodecDefault defaults[]
Definition: dcaenc.c:1232
AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_MONO
Definition: channel_layout.h:85
dcaenc_class
static const AVClass dcaenc_class
Definition: dcaenc.c:1225

Definition at line 1237 of file dcaenc.c.

Generated on Sun May 13 2018 02:04:12 for FFmpeg by   doxygen 1.8.6