dca_core.c File Reference

#include "dcadec.h"
#include "dcadata.h"
#include "dcahuff.h"
#include "dcamath.h"
#include "dca_syncwords.h"

Go to the source code of this file.

Enumerations
enum	HeaderType { HEADER_CORE, HEADER_XCH, HEADER_XXCH }
enum	AudioMode {   AMODE_MONO, AMODE_MONO_DUAL, AMODE_STEREO, AMODE_STEREO_SUMDIFF,   AMODE_STEREO_TOTAL, AMODE_3F, AMODE_2F1R, AMODE_3F1R,   AMODE_2F2R, AMODE_3F2R, AMODE_COUNT }
enum	ExtAudioType { EXT_AUDIO_XCH = 0, EXT_AUDIO_X96 = 2, EXT_AUDIO_XXCH = 6 }
enum	LFEFlag { LFE_FLAG_NONE, LFE_FLAG_128, LFE_FLAG_64, LFE_FLAG_INVALID }

Functions
static int	dca_get_vlc (GetBitContext *s, DCAVLC *v, int i)
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	dequantize (int32_t *output, const int32_t *input, int32_t step_size, int32_t scale, int residual)
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, uint8_t *data, int size)
int	ff_dca_core_parse_exss (DCACoreDecoder *s, 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 [AMODE_COUNT][5]
static const uint8_t	audio_mode_ch_mask [AMODE_COUNT]
static const uint8_t	block_code_nbits [7]

Enumeration Type Documentation

enum HeaderType

Enumerator
HEADER_CORE
HEADER_XCH
HEADER_XXCH

Definition at line 31 of file dca_core.c.

enum AudioMode

Enumerator
AMODE_MONO
AMODE_MONO_DUAL
AMODE_STEREO
AMODE_STEREO_SUMDIFF
AMODE_STEREO_TOTAL
AMODE_3F
AMODE_2F1R
AMODE_3F1R
AMODE_2F2R
AMODE_3F2R
AMODE_COUNT

Definition at line 37 of file dca_core.c.

enum ExtAudioType

Enumerator
EXT_AUDIO_XCH
EXT_AUDIO_X96
EXT_AUDIO_XXCH

Definition at line 52 of file dca_core.c.

enum LFEFlag

Enumerator
LFE_FLAG_NONE
LFE_FLAG_128
LFE_FLAG_64
LFE_FLAG_INVALID

Definition at line 58 of file dca_core.c.

Function Documentation

static int dca_get_vlc ( GetBitContext *  s, DCAVLC *  v, int  i  )

static

Definition at line 95 of file dca_core.c.

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

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

static

Definition at line 100 of file dca_core.c.

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

static int parse_frame_header ( DCACoreDecoder *  s )

static

Definition at line 109 of file dca_core.c.

Referenced by ff_dca_core_parse().

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

static

Definition at line 224 of file dca_core.c.

Referenced by parse_frame_data().

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

inlinestatic

Definition at line 420 of file dca_core.c.

Referenced by parse_subframe_header(), and parse_x96_subframe_header().

static int parse_joint_scale ( DCACoreDecoder *  s, int  sel  )

inlinestatic

Definition at line 449 of file dca_core.c.

Referenced by parse_subframe_header(), and parse_x96_subframe_header().

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

static

Definition at line 472 of file dca_core.c.

Referenced by parse_frame_data().

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

inlinestatic

Definition at line 599 of file dca_core.c.

Referenced by parse_block_codes().

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

inlinestatic

Definition at line 619 of file dca_core.c.

Referenced by extract_audio(), and parse_xbr_subframe().

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

inlinestatic

Definition at line 635 of file dca_core.c.

Referenced by extract_audio().

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

inlinestatic

Definition at line 646 of file dca_core.c.

Referenced by parse_subframe_audio(), and parse_x96_subframe_audio().

static void dequantize ( int32_t *  output, const int32_t *  input, int32_t  step_size, int32_t  scale, int  residual  )

inlinestatic

Definition at line 673 of file dca_core.c.

Referenced by parse_subframe_audio(), parse_x96_subframe_audio(), and parse_xbr_subframe().

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 696 of file dca_core.c.

Referenced by parse_subframe_audio(), and parse_x96_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 719 of file dca_core.c.

Referenced by parse_frame_data().

static void erase_adpcm_history ( DCACoreDecoder *  s )

static

Definition at line 856 of file dca_core.c.

Referenced by alloc_sample_buffer(), and ff_dca_core_flush().

static int alloc_sample_buffer ( DCACoreDecoder *  s )

static

Definition at line 869 of file dca_core.c.

Referenced by ff_dca_core_parse().

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

static

Definition at line 897 of file dca_core.c.

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

static int parse_xch_frame ( DCACoreDecoder *  s )

static

Definition at line 935 of file dca_core.c.

Referenced by ff_dca_core_parse_exss().

static int parse_xxch_frame ( DCACoreDecoder *  s )

static

Definition at line 956 of file dca_core.c.

Referenced by ff_dca_core_parse_exss().

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 1033 of file dca_core.c.

Referenced by parse_xbr_frame().

static int parse_xbr_frame ( DCACoreDecoder *  s )

static

Definition at line 1168 of file dca_core.c.

Referenced by ff_dca_core_parse_exss().

static int rand_x96 ( DCACoreDecoder *  s )

static

Definition at line 1251 of file dca_core.c.

Referenced by parse_x96_subframe_audio().

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

static

Definition at line 1257 of file dca_core.c.

Referenced by parse_x96_frame_data().

static void erase_x96_adpcm_history ( DCACoreDecoder *  s )

static

Definition at line 1365 of file dca_core.c.

Referenced by alloc_x96_sample_buffer(), and ff_dca_core_flush().

static int alloc_x96_sample_buffer ( DCACoreDecoder *  s )

static

Definition at line 1378 of file dca_core.c.

Referenced by parse_x96_frame(), and parse_x96_frame_exss().

static int parse_x96_subframe_header ( DCACoreDecoder *  s, int  xch_base  )

static

Definition at line 1404 of file dca_core.c.

Referenced by parse_x96_frame_data().

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

static

Definition at line 1488 of file dca_core.c.

Referenced by parse_x96_frame_data().

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

static

Definition at line 1575 of file dca_core.c.

Referenced by parse_x96_frame(), and parse_x96_frame_exss().

static int parse_x96_frame ( DCACoreDecoder *  s )

static

Definition at line 1610 of file dca_core.c.

Referenced by ff_dca_core_parse_exss().

static int parse_x96_frame_exss ( DCACoreDecoder *  s )

static

Definition at line 1639 of file dca_core.c.

Referenced by ff_dca_core_parse_exss().

static int parse_aux_data ( DCACoreDecoder *  s )

static

Definition at line 1715 of file dca_core.c.

Referenced by parse_optional_info().

static int parse_optional_info ( DCACoreDecoder *  s )

static

Definition at line 1783 of file dca_core.c.

Referenced by ff_dca_core_parse().

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

Definition at line 1895 of file dca_core.c.

Referenced by dcadec_decode_frame().

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

Definition at line 1928 of file dca_core.c.

Referenced by dcadec_decode_frame().

static int map_prm_ch_to_spkr ( DCACoreDecoder *  s, int  ch  )

static

Definition at line 2004 of file dca_core.c.

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

static void erase_dsp_history ( DCACoreDecoder *  s )

static

Definition at line 2040 of file dca_core.c.

Referenced by ff_dca_core_flush(), and set_filter_mode().

static void set_filter_mode ( DCACoreDecoder *  s, int  mode  )

static

Definition at line 2047 of file dca_core.c.

Referenced by ff_dca_core_filter_fixed(), and filter_frame_float().

int ff_dca_core_filter_fixed	(	DCACoreDecoder *	s,
		int	x96_synth
	)

Definition at line 2055 of file dca_core.c.

Referenced by dcadec_decode_frame(), and filter_frame_fixed().

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

static

Definition at line 2159 of file dca_core.c.

Referenced by ff_dca_core_filter_frame().

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

static

Definition at line 2256 of file dca_core.c.

Referenced by ff_dca_core_filter_frame().

int ff_dca_core_filter_frame	(	DCACoreDecoder *	s,
		AVFrame *	frame
	)

Definition at line 2441 of file dca_core.c.

Referenced by dcadec_decode_frame().

av_cold void ff_dca_core_flush

(

DCACoreDecoder *

s

)

Definition at line 2495 of file dca_core.c.

Referenced by dcadec_flush().

av_cold int ff_dca_core_init

(

DCACoreDecoder *

s

)

Definition at line 2508 of file dca_core.c.

Referenced by dcadec_init().

av_cold void ff_dca_core_close

(

DCACoreDecoder *

s

)

Definition at line 2526 of file dca_core.c.

Referenced by dcadec_close().

Variable Documentation

const int8_t prm_ch_to_spkr_map[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 65 of file dca_core.c.

Referenced by map_prm_ch_to_spkr().

const uint8_t audio_mode_ch_mask[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 78 of file dca_core.c.

Referenced by ff_dca_core_parse_exss(), and parse_coding_header().

const uint8_t block_code_nbits[7]

static

Initial value:

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

Definition at line 91 of file dca_core.c.

Referenced by parse_block_codes().