#include <math.h>
#include <stddef.h>
#include <stdio.h>
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/float_dsp.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/samplefmt.h"
#include "avcodec.h"
#include "dca.h"
#include "dca_syncwords.h"
#include "dcadata.h"
#include "dcadsp.h"
#include "dcahuff.h"
#include "fft.h"
#include "fmtconvert.h"
#include "get_bits.h"
#include "internal.h"
#include "mathops.h"
#include "synth_filter.h"

Data Structures
struct	BitAlloc
	Bit allocation. More...

Macros
#define	DCA_DOLBY 101 /* FIXME */

#define	DCA_CHANNEL_BITS 6

#define	DCA_CHANNEL_MASK 0x3F

#define	DCA_LFE 0x80

#define	HEADER_SIZE 14

#define	DCA_NSYNCAUX 0x9A1105A0

#define	MIX_REAR1(samples, s1, rs, coef)

#define	MIX_REAR2(samples, s1, s2, rs, coef)

#define	MIX_FRONT3(samples, coef)

#define	DOWNMIX_TO_STEREO(op1, op2)

Enumerations
enum	DCAMode { DCA_MONO = 0, DCA_CHANNEL, DCA_STEREO, DCA_STEREO_SUMDIFF, DCA_STEREO_TOTAL, DCA_3F, DCA_2F1R, DCA_3F1R, DCA_2F2R, DCA_3F2R, DCA_4F2R }

enum	DCAXxchSpeakerMask { DCA_XXCH_FRONT_CENTER = 0x0000001, DCA_XXCH_FRONT_LEFT = 0x0000002, DCA_XXCH_FRONT_RIGHT = 0x0000004, DCA_XXCH_SIDE_REAR_LEFT = 0x0000008, DCA_XXCH_SIDE_REAR_RIGHT = 0x0000010, DCA_XXCH_LFE1 = 0x0000020, DCA_XXCH_REAR_CENTER = 0x0000040, DCA_XXCH_SURROUND_REAR_LEFT = 0x0000080, DCA_XXCH_SURROUND_REAR_RIGHT = 0x0000100, DCA_XXCH_SIDE_SURROUND_LEFT = 0x0000200, DCA_XXCH_SIDE_SURROUND_RIGHT = 0x0000400, DCA_XXCH_FRONT_CENTER_LEFT = 0x0000800, DCA_XXCH_FRONT_CENTER_RIGHT = 0x0001000, DCA_XXCH_FRONT_HIGH_LEFT = 0x0002000, DCA_XXCH_FRONT_HIGH_CENTER = 0x0004000, DCA_XXCH_FRONT_HIGH_RIGHT = 0x0008000, DCA_XXCH_LFE2 = 0x0010000, DCA_XXCH_SIDE_FRONT_LEFT = 0x0020000, DCA_XXCH_SIDE_FRONT_RIGHT = 0x0040000, DCA_XXCH_OVERHEAD = 0x0080000, DCA_XXCH_SIDE_HIGH_LEFT = 0x0100000, DCA_XXCH_SIDE_HIGH_RIGHT = 0x0200000, DCA_XXCH_REAR_HIGH_CENTER = 0x0400000, DCA_XXCH_REAR_HIGH_LEFT = 0x0800000, DCA_XXCH_REAR_HIGH_RIGHT = 0x1000000, DCA_XXCH_REAR_LOW_CENTER = 0x2000000, DCA_XXCH_REAR_LOW_LEFT = 0x4000000, DCA_XXCH_REAR_LOW_RIGHT = 0x8000000 }

Functions
static av_always_inline int	get_bitalloc (GetBitContext gb, BitAlloc ba, int idx)

static float	dca_dmix_code (unsigned code)

static av_cold void	dca_init_vlcs (void)

static void	get_array (GetBitContext gb, int dst, int len, int bits)

static int	dca_xxch2index (DCAContext *s, int xxch_ch)

static int	dca_parse_audio_coding_header (DCAContext *s, int base_channel, int xxch)

static int	dca_parse_frame_header (DCAContext *s)

static int	get_scale (GetBitContext *gb, int level, int value, int log2range)

static int	dca_subframe_header (DCAContext *s, int base_channel, int block_index)

static void	qmf_32_subbands (DCAContext s, int chans, float samples_in[32][8], float samples_out, float scale)

static void	lfe_interpolation_fir (DCAContext s, int decimation_select, int num_deci_sample, float samples_in, float *samples_out)

static void	dca_downmix (float *samples, int srcfmt, int lfe_present, float coef[DCA_PRIM_CHANNELS_MAX+1][2], const int8_t channel_mapping)

static int	decode_blockcode (int code, int levels, int32_t *values)

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

static int	dca_subsubframe (DCAContext *s, int base_channel, int block_index)

static int	dca_filter_channels (DCAContext *s, int block_index)

static int	dca_subframe_footer (DCAContext *s, int base_channel)

static int	dca_decode_block (DCAContext *s, int base_channel, int block_index)
	Decode a dca frame block.

int	ff_dca_xbr_parse_frame (DCAContext *s)

int	ff_dca_xxch_decode_frame (DCAContext *s)

static int	dca_decode_frame (AVCodecContext avctx, void data, int got_frame_ptr, AVPacket avpkt)
	Main frame decoding function FIXME add arguments.

static av_cold int	dca_decode_init (AVCodecContext *avctx)
	DCA initialization.

static av_cold int	dca_decode_end (AVCodecContext *avctx)

Variables
static BitAlloc	dca_bitalloc_index
	indexes for samples VLC select

static BitAlloc	dca_tmode
	transition mode VLCs

static BitAlloc	dca_scalefactor
	scalefactor VLCs

static BitAlloc	dca_smpl_bitalloc [11]
	samples VLCs

static const uint8_t	abits_sizes [7] = { 7, 10, 12, 13, 15, 17, 19 }

static const uint8_t	abits_levels [7] = { 3, 5, 7, 9, 13, 17, 25 }

static const AVProfile	profiles []

static const AVOption	options []

static const AVClass	dca_decoder_class

AVCodec	ff_dca_decoder

Macro Definition Documentation

#define DCA_DOLBY 101 /* FIXME */

Definition at line 101 of file dcadec.c.

#define DCA_CHANNEL_BITS 6

Definition at line 103 of file dcadec.c.

#define DCA_CHANNEL_MASK 0x3F

Definition at line 104 of file dcadec.c.

Referenced by dca_decode_frame().

#define DCA_LFE 0x80

Definition at line 106 of file dcadec.c.

Referenced by dca_decode_frame(), and dca_parse_frame_header().

#define HEADER_SIZE 14

Definition at line 108 of file dcadec.c.

#define DCA_NSYNCAUX 0x9A1105A0

Definition at line 110 of file dcadec.c.

Referenced by dca_subframe_footer().

#define MIX_REAR1	(	samples,
		s1,
		rs,
		coef
	)

Value:

samples[0][i] += samples[s1][i] * coef[rs][0]; \

samples[1][i] += samples[s1][i] * coef[rs][1];

Definition at line 659 of file dcadec.c.

Referenced by dca_downmix().

#define MIX_REAR2	(	samples,
		s1,
		s2,
		rs,
		coef
	)

Value:

samples[0][i] += samples[s1][i] * coef[rs][0] + samples[s2][i] * coef[rs + 1][0]; \

samples[1][i] += samples[s1][i] * coef[rs][1] + samples[s2][i] * coef[rs + 1][1];

Definition at line 663 of file dcadec.c.

Referenced by dca_downmix().

#define MIX_FRONT3	(	samples,
		coef
	)

Value:

t = samples[c][i];                                                 \
    u = samples[l][i];                                                 \
    v = samples[r][i];                                                 \
    samples[0][i] = t * coef[0][0] + u * coef[1][0] + v * coef[2][0];  \
    samples[1][i] = t * coef[0][1] + u * coef[1][1] + v * coef[2][1];

Definition at line 667 of file dcadec.c.

Referenced by dca_downmix().

#define DOWNMIX_TO_STEREO	(	op1,
		op2
	)

Value:

for (i = 0; i < 256; i++) {                 \
        op1                                     \
        op2                                     \
    }

Definition at line 674 of file dcadec.c.

Referenced by dca_downmix().

Enumeration Type Documentation

enum DCAMode

Enumerator:

DCA_MONO
DCA_CHANNEL
DCA_STEREO
DCA_STEREO_SUMDIFF
DCA_STEREO_TOTAL
DCA_3F
DCA_2F1R
DCA_3F1R
DCA_2F2R
DCA_3F2R
DCA_4F2R

Definition at line 55 of file dcadec.c.

enum DCAXxchSpeakerMask

Enumerator:

DCA_XXCH_FRONT_CENTER
DCA_XXCH_FRONT_LEFT
DCA_XXCH_FRONT_RIGHT
DCA_XXCH_SIDE_REAR_LEFT
DCA_XXCH_SIDE_REAR_RIGHT
DCA_XXCH_LFE1
DCA_XXCH_REAR_CENTER
DCA_XXCH_SURROUND_REAR_LEFT
DCA_XXCH_SURROUND_REAR_RIGHT
DCA_XXCH_SIDE_SURROUND_LEFT
DCA_XXCH_SIDE_SURROUND_RIGHT
DCA_XXCH_FRONT_CENTER_LEFT
DCA_XXCH_FRONT_CENTER_RIGHT
DCA_XXCH_FRONT_HIGH_LEFT
DCA_XXCH_FRONT_HIGH_CENTER
DCA_XXCH_FRONT_HIGH_RIGHT
DCA_XXCH_LFE2
DCA_XXCH_SIDE_FRONT_LEFT
DCA_XXCH_SIDE_FRONT_RIGHT
DCA_XXCH_OVERHEAD
DCA_XXCH_SIDE_HIGH_LEFT
DCA_XXCH_SIDE_HIGH_RIGHT
DCA_XXCH_REAR_HIGH_CENTER
DCA_XXCH_REAR_HIGH_LEFT
DCA_XXCH_REAR_HIGH_RIGHT
DCA_XXCH_REAR_LOW_CENTER
DCA_XXCH_REAR_LOW_LEFT
DCA_XXCH_REAR_LOW_RIGHT

Definition at line 70 of file dcadec.c.

Function Documentation

static av_always_inline int get_bitalloc	(	GetBitContext *	gb,
		BitAlloc *	ba,
		int	idx
	)

static

Definition at line 126 of file dcadec.c.

Referenced by dca_subframe_header(), dca_subsubframe(), and get_scale().

static float dca_dmix_code ( unsigned code )

static

Definition at line 1311 of file dcadec.c.

Referenced by dca_decode_frame(), and dca_parse_audio_coding_header().

static av_cold void dca_init_vlcs ( void )

static

Definition at line 135 of file dcadec.c.

Referenced by dca_decode_init().

static void get_array	(	GetBitContext *	gb,
		int *	dst,
		int	len,
		int	bits
	)

inlinestatic

Definition at line 190 of file dcadec.c.

Referenced by dca_parse_audio_coding_header(), and ff_dca_xbr_parse_frame().

static int dca_xxch2index	(	DCAContext *	s,
		int	xxch_ch
	)

inlinestatic

Definition at line 196 of file dcadec.c.

Referenced by dca_parse_audio_coding_header().

static int dca_parse_audio_coding_header	(	DCAContext *	s,
		int	base_channel,
		int	xxch
	)

static

Definition at line 208 of file dcadec.c.

Referenced by dca_decode_frame(), dca_parse_frame_header(), and ff_dca_xxch_decode_frame().

static int dca_parse_frame_header ( DCAContext * s )

static

Definition at line 338 of file dcadec.c.

Referenced by dca_decode_frame().

static int get_scale	(	GetBitContext *	gb,
		int	level,
		int	value,
		int	log2range
	)

inlinestatic

Definition at line 402 of file dcadec.c.

Referenced by dca_subframe_header().

static int dca_subframe_header	(	DCAContext *	s,
		int	base_channel,
		int	block_index
	)

static

Definition at line 419 of file dcadec.c.

Referenced by dca_decode_block().

static void qmf_32_subbands	(	DCAContext *	s,
		int	chans,
		float	samples_in[32][8],
		float *	samples_out,
		float	scale
	)

static

Definition at line 603 of file dcadec.c.

Referenced by dca_filter_channels().

static void lfe_interpolation_fir	(	DCAContext *	s,
		int	decimation_select,
		int	num_deci_sample,
		float *	samples_in,
		float *	samples_out
	)

static

Definition at line 626 of file dcadec.c.

Referenced by dca_filter_channels().

static void dca_downmix	(	float **	samples,
		int	srcfmt,
		int	lfe_present,
		float	coef[DCA_PRIM_CHANNELS_MAX+1][2],
		const int8_t *	channel_mapping
	)

static

Definition at line 680 of file dcadec.c.

Referenced by dca_filter_channels().

static int decode_blockcode	(	int	code,
		int	levels,
		int32_t *	values
	)

static

Definition at line 744 of file dcadec.c.

Referenced by decode_blockcodes().

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

static

Definition at line 758 of file dcadec.c.

Referenced by dca_subsubframe(), and ff_dca_xbr_parse_frame().

static int dca_subsubframe	(	DCAContext *	s,
		int	base_channel,
		int	block_index
	)

static

Definition at line 768 of file dcadec.c.

Referenced by dca_decode_block().

static int dca_filter_channels	(	DCAContext *	s,
		int	block_index
	)

static

Definition at line 920 of file dcadec.c.

Referenced by dca_decode_frame().

static int dca_subframe_footer	(	DCAContext *	s,
		int	base_channel
	)

static

Definition at line 951 of file dcadec.c.

Referenced by dca_decode_block().

static int dca_decode_block	(	DCAContext *	s,
		int	base_channel,
		int	block_index
	)

static

Decode a dca frame block.

Parameters

s	pointer to the DCAContext

Definition at line 1060 of file dcadec.c.

Referenced by dca_decode_frame(), and ff_dca_xxch_decode_frame().

int ff_dca_xbr_parse_frame ( DCAContext * s )

Definition at line 1096 of file dcadec.c.

Referenced by ff_dca_exss_parse_header().

int ff_dca_xxch_decode_frame ( DCAContext * s )

Definition at line 1258 of file dcadec.c.

Referenced by dca_decode_frame(), and ff_dca_exss_parse_header().

static int dca_decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	got_frame_ptr,
		AVPacket *	avpkt
	)

static

Main frame decoding function FIXME add arguments.

Definition at line 1322 of file dcadec.c.

static av_cold int dca_decode_init ( AVCodecContext * avctx )

static

DCA initialization.

Parameters

avctx pointer to the AVCodecContext

Definition at line 1797 of file dcadec.c.

static av_cold int dca_decode_end ( AVCodecContext * avctx )

static

Definition at line 1829 of file dcadec.c.

Variable Documentation

BitAlloc dca_bitalloc_index

static

indexes for samples VLC select

Definition at line 121 of file dcadec.c.

BitAlloc dca_tmode

static

transition mode VLCs

Definition at line 122 of file dcadec.c.

BitAlloc dca_scalefactor

static

scalefactor VLCs

Definition at line 123 of file dcadec.c.

BitAlloc dca_smpl_bitalloc[11]

static

samples VLCs

Definition at line 124 of file dcadec.c.

const uint8_t abits_sizes[7] = { 7, 10, 12, 13, 15, 17, 19 }

static

Definition at line 765 of file dcadec.c.

Referenced by dca_subsubframe(), and ff_dca_xbr_parse_frame().

const uint8_t abits_levels[7] = { 3, 5, 7, 9, 13, 17, 25 }

static

Definition at line 766 of file dcadec.c.

Referenced by dca_subsubframe(), and ff_dca_xbr_parse_frame().

const AVProfile profiles[]

static

Initial value:

= {
    { FF_PROFILE_DTS,        "DTS"        },
    { FF_PROFILE_DTS_ES,     "DTS-ES"     },
    { FF_PROFILE_DTS_96_24,  "DTS 96/24"  },
    { FF_PROFILE_DTS_HD_HRA, "DTS-HD HRA" },
    { FF_PROFILE_DTS_HD_MA,  "DTS-HD MA"  },
    { FF_PROFILE_UNKNOWN },
}

Definition at line 1838 of file dcadec.c.

const AVOption options[]

static

Initial value:

= {
    { "disable_xch", "disable decoding of the XCh extension", 0x42, AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM },
    { NULL },
}

Definition at line 1847 of file dcadec.c.

const AVClass dca_decoder_class

static

Initial value:

= {
    .class_name = "DCA decoder",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
    .category   = AV_CLASS_CATEGORY_DECODER,
}

Definition at line 1852 of file dcadec.c.

AVCodec ff_dca_decoder

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(DCAContext),
    .init            = dca_decode_init,
    .decode          = dca_decode_frame,
    .close           = dca_decode_end,
    .capabilities    = CODEC_CAP_CHANNEL_CONF | CODEC_CAP_DR1,
    .sample_fmts     = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                       AV_SAMPLE_FMT_NONE },
    .profiles        = NULL_IF_CONFIG_SMALL(profiles),
    .priv_class      = &dca_decoder_class,
}

Definition at line 1860 of file dcadec.c.

Data Structures

Macros

Enumerations

Functions

Variables

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation

Variable Documentation