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

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]

static const uint8_t	quant_index_sel_nbits [DCA_CODE_BOOKS]

static const uint8_t	quant_index_group_size [DCA_CODE_BOOKS]

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 103 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 108 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 117 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 232 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 428 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 457 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 480 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 607 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 627 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 643 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 654 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 681 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 704 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 727 of file dca_core.c.

Referenced by parse_frame_data().

static void erase_adpcm_history ( DCACoreDecoder * s )

static

Definition at line 864 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 877 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 905 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 943 of file dca_core.c.

Referenced by ff_dca_core_parse_exss().

static int parse_xxch_frame ( DCACoreDecoder * s )

static

Definition at line 964 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 1041 of file dca_core.c.

Referenced by parse_xbr_frame().

static int parse_xbr_frame ( DCACoreDecoder * s )

static

Definition at line 1176 of file dca_core.c.

Referenced by ff_dca_core_parse_exss().

static int rand_x96 ( DCACoreDecoder * s )

static

Definition at line 1259 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 1265 of file dca_core.c.

Referenced by parse_x96_frame_data().

static void erase_x96_adpcm_history ( DCACoreDecoder * s )

static

Definition at line 1373 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 1386 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 1412 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 1496 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 1583 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 1618 of file dca_core.c.

Referenced by ff_dca_core_parse_exss().

static int parse_x96_frame_exss ( DCACoreDecoder * s )

static

Definition at line 1647 of file dca_core.c.

Referenced by ff_dca_core_parse_exss().

static int parse_aux_data ( DCACoreDecoder * s )

static

Definition at line 1723 of file dca_core.c.

Referenced by parse_optional_info().

static int parse_optional_info ( DCACoreDecoder * s )

static

Definition at line 1791 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 1903 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 1936 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 2012 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 2048 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 2055 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 2063 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 2167 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 2264 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 2449 of file dca_core.c.

Referenced by dcadec_decode_frame().

av_cold void ff_dca_core_flush ( DCACoreDecoder * s )

Definition at line 2503 of file dca_core.c.

Referenced by dcadec_flush().

av_cold int ff_dca_core_init ( DCACoreDecoder * s )

Definition at line 2516 of file dca_core.c.

Referenced by dcadec_init().

av_cold void ff_dca_core_close ( DCACoreDecoder * s )

Definition at line 2534 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
}