dca_core.c File Reference

#include "libavutil/channel_layout.h"
#include "libavutil/emms.h"
#include "dcaadpcm.h"
#include "dcadec.h"
#include "dcadata.h"
#include "dcahuff.h"
#include "dcamath.h"
#include "dca_syncwords.h"
#include "decode.h"

Go to the source code of this file.

Enumerations
enum	HeaderType { HEADER_CORE, HEADER_XCH, HEADER_XXCH }

Functions
static int	dca_get_vlc (GetBitContext *s, const VLC *vlc)
static void	get_array (GetBitContext *s, int32_t *array, int size, int n)
static int	parse_frame_header (DCACoreDecoder *s)
static int	parse_coding_header (DCACoreDecoder *s, enum HeaderType header, int xch_base)
static int	parse_scale (DCACoreDecoder *s, int *scale_index, int sel)
static int	parse_joint_scale (DCACoreDecoder *s, int sel)
static int	parse_subframe_header (DCACoreDecoder *s, int sf, enum HeaderType header, int xch_base)
static int	decode_blockcodes (int code1, int code2, int levels, int32_t *audio)
static int	parse_block_codes (DCACoreDecoder *s, int32_t *audio, int abits)
static int	parse_huffman_codes (DCACoreDecoder *s, int32_t *audio, int abits, int sel)
static int	extract_audio (DCACoreDecoder *s, int32_t *audio, int abits, int ch)
static void	inverse_adpcm (int32_t **subband_samples, const int16_t *vq_index, const int8_t *prediction_mode, int sb_start, int sb_end, int ofs, int len)
static int	parse_subframe_audio (DCACoreDecoder *s, int sf, enum HeaderType header, int xch_base, int *sub_pos, int *lfe_pos)
static void	erase_adpcm_history (DCACoreDecoder *s)
static int	alloc_sample_buffer (DCACoreDecoder *s)
static int	parse_frame_data (DCACoreDecoder *s, enum HeaderType header, int xch_base)
static int	parse_xch_frame (DCACoreDecoder *s)
static int	parse_xxch_frame (DCACoreDecoder *s)
static int	parse_xbr_subframe (DCACoreDecoder *s, int xbr_base_ch, int xbr_nchannels, int *xbr_nsubbands, int xbr_transition_mode, int sf, int *sub_pos)
static int	parse_xbr_frame (DCACoreDecoder *s)
static int	rand_x96 (DCACoreDecoder *s)
static int	parse_x96_subframe_audio (DCACoreDecoder *s, int sf, int xch_base, int *sub_pos)
static void	erase_x96_adpcm_history (DCACoreDecoder *s)
static int	alloc_x96_sample_buffer (DCACoreDecoder *s)
static int	parse_x96_subframe_header (DCACoreDecoder *s, int xch_base)
static int	parse_x96_coding_header (DCACoreDecoder *s, int exss, int xch_base)
static int	parse_x96_frame_data (DCACoreDecoder *s, int exss, int xch_base)
static int	parse_x96_frame (DCACoreDecoder *s)
static int	parse_x96_frame_exss (DCACoreDecoder *s)
static int	parse_aux_data (DCACoreDecoder *s)
static int	parse_optional_info (DCACoreDecoder *s)
int	ff_dca_core_parse (DCACoreDecoder *s, const uint8_t *data, int size)
int	ff_dca_core_parse_exss (DCACoreDecoder *s, const uint8_t *data, DCAExssAsset *asset)
static int	map_prm_ch_to_spkr (DCACoreDecoder *s, int ch)
static void	erase_dsp_history (DCACoreDecoder *s)
static void	set_filter_mode (DCACoreDecoder *s, int mode)
int	ff_dca_core_filter_fixed (DCACoreDecoder *s, int x96_synth)
static int	filter_frame_fixed (DCACoreDecoder *s, AVFrame *frame)
static int	filter_frame_float (DCACoreDecoder *s, AVFrame *frame)
int	ff_dca_core_filter_frame (DCACoreDecoder *s, AVFrame *frame)
av_cold void	ff_dca_core_flush (DCACoreDecoder *s)
av_cold int	ff_dca_core_init (DCACoreDecoder *s)
av_cold void	ff_dca_core_close (DCACoreDecoder *s)

Variables
static const int8_t	prm_ch_to_spkr_map [DCA_AMODE_COUNT][5]
static const uint8_t	audio_mode_ch_mask [DCA_AMODE_COUNT]
static const uint8_t	block_code_nbits [7]

Enumeration Type Documentation

HeaderType

enum HeaderType

Enumerator
HEADER_CORE
HEADER_XCH
HEADER_XXCH

Definition at line 35 of file dca_core.c.

Function Documentation

dca_get_vlc()

static int dca_get_vlc ( GetBitContext *  s, const VLC *  vlc  )

static

Definition at line 71 of file dca_core.c.

Referenced by parse_huffman_codes(), parse_subframe_header(), and parse_x96_subframe_header().

get_array()

static void get_array ( GetBitContext *  s, int32_t *  array, int  size, int  n  )

static

Definition at line 76 of file dca_core.c.

Referenced by extract_audio(), parse_subframe_audio(), and parse_xbr_subframe().

parse_frame_header()

static int parse_frame_header ( DCACoreDecoder *  s )

static

Definition at line 85 of file dca_core.c.

Referenced by ff_dca_core_parse().

parse_coding_header()

static int parse_coding_header ( DCACoreDecoder *  s, enum HeaderType  header, int  xch_base  )

static

Definition at line 154 of file dca_core.c.

Referenced by parse_frame_data().

parse_scale()

static int parse_scale ( DCACoreDecoder *  s, int *  scale_index, int  sel  )

inlinestatic

Definition at line 350 of file dca_core.c.

Referenced by parse_subframe_header(), and parse_x96_subframe_header().

parse_joint_scale()

static int parse_joint_scale ( DCACoreDecoder *  s, int  sel  )

inlinestatic

Definition at line 380 of file dca_core.c.

Referenced by parse_subframe_header(), and parse_x96_subframe_header().

parse_subframe_header()

static int parse_subframe_header ( DCACoreDecoder *  s, int  sf, enum HeaderType  header, int  xch_base  )

static

Definition at line 404 of file dca_core.c.

Referenced by parse_frame_data().

decode_blockcodes()

static int decode_blockcodes ( int  code1, int  code2, int  levels, int32_t *  audio  )

inlinestatic

Definition at line 532 of file dca_core.c.

Referenced by parse_block_codes().

parse_block_codes()

static int parse_block_codes ( DCACoreDecoder *  s, int32_t *  audio, int  abits  )

inlinestatic

Definition at line 552 of file dca_core.c.

Referenced by extract_audio(), and parse_xbr_subframe().

parse_huffman_codes()

static int parse_huffman_codes ( DCACoreDecoder *  s, int32_t *  audio, int  abits, int  sel  )

inlinestatic

Definition at line 568 of file dca_core.c.

Referenced by extract_audio().

extract_audio()

static int extract_audio ( DCACoreDecoder *  s, int32_t *  audio, int  abits, int  ch  )

inlinestatic

Definition at line 579 of file dca_core.c.

Referenced by parse_subframe_audio(), and parse_x96_subframe_audio().

inverse_adpcm()

static void inverse_adpcm ( int32_t **  subband_samples, const int16_t *  vq_index, const int8_t *  prediction_mode, int  sb_start, int  sb_end, int  ofs, int  len  )

inlinestatic

Definition at line 606 of file dca_core.c.

Referenced by parse_subframe_audio(), and parse_x96_subframe_audio().

parse_subframe_audio()

static int parse_subframe_audio ( DCACoreDecoder *  s, int  sf, enum HeaderType  header, int  xch_base, int *  sub_pos, int *  lfe_pos  )

static

Definition at line 627 of file dca_core.c.

Referenced by parse_frame_data().

erase_adpcm_history()

static void erase_adpcm_history ( DCACoreDecoder *  s )

static

Definition at line 764 of file dca_core.c.

Referenced by alloc_sample_buffer(), and ff_dca_core_flush().

alloc_sample_buffer()

static int alloc_sample_buffer ( DCACoreDecoder *  s )

static

Definition at line 779 of file dca_core.c.

Referenced by ff_dca_core_parse().

parse_frame_data()

static int parse_frame_data ( DCACoreDecoder *  s, enum HeaderType  header, int  xch_base  )

static

Definition at line 807 of file dca_core.c.

Referenced by ff_dca_core_parse(), parse_xch_frame(), and parse_xxch_frame().

parse_xch_frame()

static int parse_xch_frame ( DCACoreDecoder *  s )

static

Definition at line 847 of file dca_core.c.

Referenced by ff_dca_core_parse_exss().

parse_xxch_frame()

static int parse_xxch_frame ( DCACoreDecoder *  s )

static

Definition at line 868 of file dca_core.c.

Referenced by ff_dca_core_parse_exss().

parse_xbr_subframe()

static int parse_xbr_subframe ( DCACoreDecoder *  s, int  xbr_base_ch, int  xbr_nchannels, int *  xbr_nsubbands, int  xbr_transition_mode, int  sf, int *  sub_pos  )

static

Definition at line 945 of file dca_core.c.

Referenced by parse_xbr_frame().

parse_xbr_frame()

static int parse_xbr_frame ( DCACoreDecoder *  s )

static

Definition at line 1080 of file dca_core.c.

Referenced by ff_dca_core_parse_exss().

rand_x96()

static int rand_x96 ( DCACoreDecoder *  s )

static

Definition at line 1163 of file dca_core.c.

Referenced by parse_x96_subframe_audio().

parse_x96_subframe_audio()

static int parse_x96_subframe_audio ( DCACoreDecoder *  s, int  sf, int  xch_base, int *  sub_pos  )

static

Definition at line 1169 of file dca_core.c.

Referenced by parse_x96_frame_data().

erase_x96_adpcm_history()

static void erase_x96_adpcm_history ( DCACoreDecoder *  s )

static

Definition at line 1277 of file dca_core.c.

Referenced by alloc_x96_sample_buffer(), and ff_dca_core_flush().

alloc_x96_sample_buffer()

static int alloc_x96_sample_buffer ( DCACoreDecoder *  s )

static

Definition at line 1292 of file dca_core.c.

Referenced by parse_x96_frame(), and parse_x96_frame_exss().

parse_x96_subframe_header()

static int parse_x96_subframe_header ( DCACoreDecoder *  s, int  xch_base  )

static

Definition at line 1318 of file dca_core.c.

Referenced by parse_x96_frame_data().

parse_x96_coding_header()

static int parse_x96_coding_header ( DCACoreDecoder *  s, int  exss, int  xch_base  )

static

Definition at line 1402 of file dca_core.c.

Referenced by parse_x96_frame_data().

parse_x96_frame_data()

static int parse_x96_frame_data ( DCACoreDecoder *  s, int  exss, int  xch_base  )

static

Definition at line 1489 of file dca_core.c.

Referenced by parse_x96_frame(), and parse_x96_frame_exss().

parse_x96_frame()

static int parse_x96_frame ( DCACoreDecoder *  s )

static

Definition at line 1526 of file dca_core.c.

Referenced by ff_dca_core_parse_exss().

parse_x96_frame_exss()

static int parse_x96_frame_exss ( DCACoreDecoder *  s )

static

Definition at line 1555 of file dca_core.c.

Referenced by ff_dca_core_parse_exss().

parse_aux_data()

static int parse_aux_data ( DCACoreDecoder *  s )

static

Definition at line 1631 of file dca_core.c.

Referenced by parse_optional_info().

parse_optional_info()

static int parse_optional_info ( DCACoreDecoder *  s )

static

Definition at line 1699 of file dca_core.c.

Referenced by ff_dca_core_parse().

ff_dca_core_parse()

int ff_dca_core_parse	(	DCACoreDecoder *	s,
		const uint8_t *	data,
		int	size
	)

Definition at line 1812 of file dca_core.c.

Referenced by dcadec_decode_frame().

ff_dca_core_parse_exss()

int ff_dca_core_parse_exss	(	DCACoreDecoder *	s,
		const uint8_t *	data,
		DCAExssAsset *	asset
	)

Definition at line 1845 of file dca_core.c.

Referenced by dcadec_decode_frame().

map_prm_ch_to_spkr()

static int map_prm_ch_to_spkr ( DCACoreDecoder *  s, int  ch  )

static

Definition at line 1922 of file dca_core.c.

Referenced by ff_dca_core_filter_fixed(), filter_frame_fixed(), and filter_frame_float().

erase_dsp_history()

static void erase_dsp_history ( DCACoreDecoder *  s )

static

Definition at line 1958 of file dca_core.c.

Referenced by ff_dca_core_flush(), and set_filter_mode().

set_filter_mode()

static void set_filter_mode ( DCACoreDecoder *  s, int  mode  )

static

Definition at line 1965 of file dca_core.c.

Referenced by ff_dca_core_filter_fixed(), and filter_frame_float().

ff_dca_core_filter_fixed()

int ff_dca_core_filter_fixed	(	DCACoreDecoder *	s,
		int	x96_synth
	)

Definition at line 1973 of file dca_core.c.

Referenced by dcadec_decode_frame(), and filter_frame_fixed().

filter_frame_fixed()

static int filter_frame_fixed ( DCACoreDecoder *  s, AVFrame *  frame  )

static

Definition at line 2077 of file dca_core.c.

Referenced by ff_dca_core_filter_frame().

filter_frame_float()

static int filter_frame_float ( DCACoreDecoder *  s, AVFrame *  frame  )

static

Definition at line 2174 of file dca_core.c.

Referenced by ff_dca_core_filter_frame().

ff_dca_core_filter_frame()

int ff_dca_core_filter_frame	(	DCACoreDecoder *	s,
		AVFrame *	frame
	)

Definition at line 2360 of file dca_core.c.

Referenced by dcadec_decode_frame().

ff_dca_core_flush()

av_cold void ff_dca_core_flush

(

DCACoreDecoder *

s

)

Definition at line 2414 of file dca_core.c.

Referenced by dcadec_flush().

ff_dca_core_init()

av_cold int ff_dca_core_init

(

DCACoreDecoder *

s

)

Definition at line 2427 of file dca_core.c.

Referenced by dcadec_init().

ff_dca_core_close()

av_cold void ff_dca_core_close

(

DCACoreDecoder *

s

)

Definition at line 2453 of file dca_core.c.

Referenced by dcadec_close().

Variable Documentation

prm_ch_to_spkr_map

const int8_t prm_ch_to_spkr_map[DCA_AMODE_COUNT][5]

static

Initial value:

= {
    { DCA_SPEAKER_C,            -1,             -1,             -1,             -1 },
    { DCA_SPEAKER_L, DCA_SPEAKER_R,             -1,             -1,             -1 },
    { DCA_SPEAKER_L, DCA_SPEAKER_R,             -1,             -1,             -1 },
    { DCA_SPEAKER_L, DCA_SPEAKER_R,             -1,             -1,             -1 },
    { DCA_SPEAKER_L, DCA_SPEAKER_R,             -1,             -1,             -1 },
    { DCA_SPEAKER_C, DCA_SPEAKER_L, DCA_SPEAKER_R ,             -1,             -1 },
    { DCA_SPEAKER_L, DCA_SPEAKER_R, DCA_SPEAKER_Cs,             -1,             -1 },
    { DCA_SPEAKER_C, DCA_SPEAKER_L, DCA_SPEAKER_R , DCA_SPEAKER_Cs,             -1 },
    { DCA_SPEAKER_L, DCA_SPEAKER_R, DCA_SPEAKER_Ls, DCA_SPEAKER_Rs,             -1 },
    { DCA_SPEAKER_C, DCA_SPEAKER_L, DCA_SPEAKER_R,  DCA_SPEAKER_Ls, DCA_SPEAKER_Rs }
}

Definition at line 41 of file dca_core.c.

Referenced by map_prm_ch_to_spkr().

audio_mode_ch_mask

const uint8_t audio_mode_ch_mask[DCA_AMODE_COUNT]

static

Initial value:

= {
    DCA_SPEAKER_LAYOUT_MONO,
    DCA_SPEAKER_LAYOUT_STEREO,
    DCA_SPEAKER_LAYOUT_STEREO,
    DCA_SPEAKER_LAYOUT_STEREO,
    DCA_SPEAKER_LAYOUT_STEREO,
    DCA_SPEAKER_LAYOUT_3_0,
    DCA_SPEAKER_LAYOUT_2_1,
    DCA_SPEAKER_LAYOUT_3_1,
    DCA_SPEAKER_LAYOUT_2_2,
    DCA_SPEAKER_LAYOUT_5POINT0
}

Definition at line 54 of file dca_core.c.

Referenced by ff_dca_core_parse_exss(), and parse_coding_header().

block_code_nbits

const uint8_t block_code_nbits[7]

static

Initial value:

= {
    7, 10, 12, 13, 15, 17, 19
}

Definition at line 67 of file dca_core.c.

Referenced by parse_block_codes().