libavcodec/dca.c File Reference

#include <math.h>
#include <stddef.h>
#include <stdio.h>
#include "libavutil/common.h"
#include "libavutil/intmath.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "libavutil/audioconvert.h"
#include "avcodec.h"
#include "dsputil.h"
#include "fft.h"
#include "get_bits.h"
#include "put_bits.h"
#include "dcadata.h"
#include "dcahuff.h"
#include "dca.h"
#include "synth_filter.h"
#include "dcadsp.h"
#include "fmtconvert.h"

Go to the source code of this file.

Data Structures

struct BitAlloc

Bit allocation. More...

struct DCAContext

Defines

#define DCA_PRIM_CHANNELS_MAX   (7)

#define DCA_SUBBANDS   (32)

#define DCA_ABITS_MAX   (32)

#define DCA_SUBSUBFRAMES_MAX   (4)

#define DCA_SUBFRAMES_MAX   (16)

#define DCA_BLOCKS_MAX   (16)

#define DCA_LFE_MAX   (3)

#define DCA_CORE_EXTS   (DCA_EXT_XCH | DCA_EXT_XXCH | DCA_EXT_X96)

#define DCA_DOLBY   101

#define DCA_CHANNEL_BITS   6

#define DCA_CHANNEL_MASK   0x3F

#define DCA_LFE   0x80

#define HEADER_SIZE   14

#define DCA_MAX_FRAME_SIZE   16384

#define DCA_MAX_EXSS_HEADER_SIZE   4096

#define DCA_BUFFER_PADDING_SIZE   1024

#define MIX_REAR1(samples, si1, rs, coef)

#define MIX_REAR2(samples, si1, si2, 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 DCAExSSSpeakerMask {
  DCA_EXSS_FRONT_CENTER = 0x0001, DCA_EXSS_FRONT_LEFT_RIGHT = 0x0002, DCA_EXSS_SIDE_REAR_LEFT_RIGHT = 0x0004, DCA_EXSS_LFE = 0x0008,
  DCA_EXSS_REAR_CENTER = 0x0010, DCA_EXSS_FRONT_HIGH_LEFT_RIGHT = 0x0020, DCA_EXSS_REAR_LEFT_RIGHT = 0x0040, DCA_EXSS_FRONT_HIGH_CENTER = 0x0080,
  DCA_EXSS_OVERHEAD = 0x0100, DCA_EXSS_CENTER_LEFT_RIGHT = 0x0200, DCA_EXSS_WIDE_LEFT_RIGHT = 0x0400, DCA_EXSS_SIDE_LEFT_RIGHT = 0x0800,
  DCA_EXSS_LFE2 = 0x1000, DCA_EXSS_SIDE_HIGH_LEFT_RIGHT = 0x2000, DCA_EXSS_REAR_HIGH_CENTER = 0x4000, DCA_EXSS_REAR_HIGH_LEFT_RIGHT = 0x8000
}

enum DCAExtensionMask {
  DCA_EXT_CORE = 0x001, DCA_EXT_XXCH = 0x002, DCA_EXT_X96 = 0x004, DCA_EXT_XCH = 0x008,
  DCA_EXT_EXSS_CORE = 0x010, DCA_EXT_EXSS_XBR = 0x020, DCA_EXT_EXSS_XXCH = 0x040, DCA_EXT_EXSS_X96 = 0x080,
  DCA_EXT_EXSS_LBR = 0x100, DCA_EXT_EXSS_XLL = 0x200
}

Functions

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

static av_cold void dca_init_vlcs (void)

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

static int dca_parse_audio_coding_header (DCAContext *s, int base_channel)

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, float scale)

static void dca_downmix (float *samples, int srcfmt, int downmix_coef[DCA_PRIM_CHANNELS_MAX][2], const int8_t *channel_mapping)

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

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

static void int8x8_fmul_int32 (float *dst, const int8_t *src, int scale)

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.

static int dca_convert_bitstream (const uint8_t *src, int src_size, uint8_t *dst, int max_size)

Convert bitstream to one representation based on sync marker.

static int dca_exss_mask2count (int mask)

Return the number of channels in an ExSS speaker mask (HD).

static void dca_exss_skip_mix_coeffs (GetBitContext *gb, int channels, int out_ch)

Skip mixing coefficients of a single mix out configuration (HD).

static int dca_exss_parse_asset_header (DCAContext *s)

Parse extension substream asset header (HD).

static void dca_exss_parse_header (DCAContext *s)

Parse extension substream header (HD).

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 const int dca_ext_audio_descr_mask []

static const uint64_t dca_core_channel_layout []

static const int8_t dca_lfe_index []

static const int8_t dca_channel_reorder_lfe [][9]

static const int8_t dca_channel_reorder_lfe_xch [][9]

static const int8_t dca_channel_reorder_nolfe [][9]

static const int8_t dca_channel_reorder_nolfe_xch [][9]

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 uint16_t dca_vlc_offs []

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 []

AVCodec ff_dca_decoder

Define Documentation

#define DCA_ABITS_MAX (32)

Definition at line 54 of file dca.c.

#define DCA_BLOCKS_MAX (16)

Definition at line 57 of file dca.c.

#define DCA_BUFFER_PADDING_SIZE 1024

Definition at line 260 of file dca.c.

#define DCA_CHANNEL_BITS 6

Definition at line 250 of file dca.c.

#define DCA_CHANNEL_MASK 0x3F

Definition at line 251 of file dca.c.

Referenced by dca_subframe_header().

#define DCA_CORE_EXTS (DCA_EXT_XCH | DCA_EXT_XXCH | DCA_EXT_X96)

Definition at line 120 of file dca.c.

Referenced by dca_exss_parse_asset_header().

#define DCA_DOLBY 101

Definition at line 248 of file dca.c.

#define DCA_LFE 0x80

Definition at line 253 of file dca.c.

Referenced by dca_filter_channels(), and dca_parse_frame_header().

#define DCA_LFE_MAX (3)

Definition at line 58 of file dca.c.

#define DCA_MAX_EXSS_HEADER_SIZE 4096

Definition at line 258 of file dca.c.

Referenced by dca_decode_frame().

#define DCA_MAX_FRAME_SIZE 16384

Definition at line 257 of file dca.c.

Referenced by dca_decode_frame(), and put_frame().

#define DCA_PRIM_CHANNELS_MAX (7)

Definition at line 52 of file dca.c.

Referenced by dca_decode_init(), and dca_parse_audio_coding_header().

#define DCA_SUBBANDS (32)

Definition at line 53 of file dca.c.

Referenced by dca_filter_channels(), dca_parse_audio_coding_header(), dca_subsubframe(), put_primary_audio_header(), and put_subframe().

#define DCA_SUBFRAMES_MAX (16)

Definition at line 56 of file dca.c.

#define DCA_SUBSUBFRAMES_MAX (4)

Definition at line 55 of file dca.c.

#define DOWNMIX_TO_STEREO	(	op1,
		op2		)

Value:

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

Definition at line 1022 of file dca.c.

Referenced by dca_downmix().

#define HEADER_SIZE 14

Definition at line 255 of file dca.c.

#define MIX_FRONT3	(	samples,
		coef		)

Value:

t = samples[i + c];                                                \
    u = samples[i + l];                                                \
    v = samples[i + r];                                                \
    samples[i]     = t * coef[0][0] + u * coef[1][0] + v * coef[2][0]; \
    samples[i+256] = t * coef[0][1] + u * coef[1][1] + v * coef[2][1];

Definition at line 1015 of file dca.c.

Referenced by dca_downmix().

#define MIX_REAR1	(	samples,
		si1,
		rs,
		coef	)

Value:

samples[i]     += samples[si1] * coef[rs][0];   \
    samples[i+256] += samples[si1] * coef[rs][1];

Definition at line 1007 of file dca.c.

Referenced by dca_downmix().

#define MIX_REAR2	(	samples,
		si1,
		si2,
		rs,
		coef	)

Value:

samples[i]     += samples[si1] * coef[rs][0] + samples[si2] * coef[rs + 1][0]; \
    samples[i+256] += samples[si1] * coef[rs][1] + samples[si2] * coef[rs + 1][1];

Definition at line 1011 of file dca.c.

Referenced by dca_downmix().

Enumeration Type Documentation

enum DCAExSSSpeakerMask

Enumerator:

DCA_EXSS_FRONT_CENTER
DCA_EXSS_FRONT_LEFT_RIGHT
DCA_EXSS_SIDE_REAR_LEFT_RIGHT
DCA_EXSS_LFE
DCA_EXSS_REAR_CENTER
DCA_EXSS_FRONT_HIGH_LEFT_RIGHT
DCA_EXSS_REAR_LEFT_RIGHT
DCA_EXSS_FRONT_HIGH_CENTER
DCA_EXSS_OVERHEAD
DCA_EXSS_CENTER_LEFT_RIGHT
DCA_EXSS_WIDE_LEFT_RIGHT
DCA_EXSS_SIDE_LEFT_RIGHT
DCA_EXSS_LFE2
DCA_EXSS_SIDE_HIGH_LEFT_RIGHT
DCA_EXSS_REAR_HIGH_CENTER
DCA_EXSS_REAR_HIGH_LEFT_RIGHT

Definition at line 75 of file dca.c.

enum DCAExtensionMask

Enumerator:

DCA_EXT_CORE	core in core substream
DCA_EXT_XXCH	XXCh channels extension in core substream.
DCA_EXT_X96	96/24 extension in core substream
DCA_EXT_XCH	XCh channel extension in core substream.
DCA_EXT_EXSS_CORE	core in ExSS (extension substream)
DCA_EXT_EXSS_XBR	extended bitrate extension in ExSS
DCA_EXT_EXSS_XXCH	XXCh channels extension in ExSS.
DCA_EXT_EXSS_X96	96/24 extension in ExSS
DCA_EXT_EXSS_LBR	low bitrate component in ExSS
DCA_EXT_EXSS_XLL	lossless extension in ExSS

Definition at line 94 of file dca.c.

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 60 of file dca.c.

Function Documentation

static int dca_convert_bitstream	(	const uint8_t *	src,
		int	src_size,
		uint8_t *	dst,
		int	max_size
	)			`[static]`

Convert bitstream to one representation based on sync marker.

Definition at line 1381 of file dca.c.

Referenced by dca_decode_frame().

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 1333 of file dca.c.

Referenced by dca_decode_frame().

static av_cold int dca_decode_end ( AVCodecContext * avctx ) [static]

Definition at line 1974 of file dca.c.

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 1688 of file dca.c.

static av_cold int dca_decode_init ( AVCodecContext * avctx ) [static]

DCA initialization.

Parameters:

avctx

pointer to the AVCodecContext

Definition at line 1937 of file dca.c.

static void dca_downmix	(	float *	samples,
		int	srcfmt,
		int	downmix_coef[DCA_PRIM_CHANNELS_MAX][2],
		const int8_t *	channel_mapping
	)			`[static]`

Definition at line 1028 of file dca.c.

Referenced by dca_filter_channels().

static int dca_exss_mask2count ( int mask ) [static]

Return the number of channels in an ExSS speaker mask (HD).

Definition at line 1422 of file dca.c.

Referenced by dca_exss_parse_asset_header(), and dca_exss_parse_header().

static int dca_exss_parse_asset_header ( DCAContext * s ) [static]

Parse extension substream asset header (HD).

Definition at line 1454 of file dca.c.

Referenced by dca_exss_parse_header().

static void dca_exss_parse_header ( DCAContext * s ) [static]

Parse extension substream header (HD).

Definition at line 1605 of file dca.c.

Referenced by dca_decode_frame().

static void dca_exss_skip_mix_coeffs	(	GetBitContext *	gb,
		int	channels,
		int	out_ch
	)			`[static]`

Skip mixing coefficients of a single mix out configuration (HD).

Definition at line 1440 of file dca.c.

Referenced by dca_exss_parse_asset_header().

static int dca_filter_channels	(	DCAContext *	s,
		int	block_index
	)			`[static]`

Definition at line 1269 of file dca.c.

Referenced by dca_decode_frame().

static av_cold void dca_init_vlcs ( void ) [static]

Definition at line 400 of file dca.c.

Referenced by dca_decode_init().

static int dca_parse_audio_coding_header	(	DCAContext *	s,
		int	base_channel
	)			`[static]`

Definition at line 461 of file dca.c.

Referenced by dca_decode_frame(), and dca_parse_frame_header().

static int dca_parse_frame_header ( DCAContext * s ) [static]

Definition at line 545 of file dca.c.

Referenced by dca_decode_frame().

static int dca_subframe_footer	(	DCAContext *	s,
		int	base_channel
	)			`[static]`

Definition at line 1301 of file dca.c.

Referenced by dca_decode_block().

static int dca_subframe_header	(	DCAContext *	s,
		int	base_channel,
		int	block_index
	)			`[static]`

Definition at line 659 of file dca.c.

Referenced by dca_decode_block().

static int dca_subsubframe	(	DCAContext *	s,
		int	base_channel,
		int	block_index
	)			`[static]`

Definition at line 1125 of file dca.c.

Referenced by dca_decode_block().

static int decode_blockcode	(	int	code,
		int	levels,
		int *	values
	)			`[static]`

Definition at line 1091 of file dca.c.

Referenced by decode_blockcodes().

static int decode_blockcodes	(	int	code1,
		int	code2,
		int	levels,
		int *	values
	)			`[static]`

Definition at line 1105 of file dca.c.

Referenced by dca_subsubframe().

static void get_array	(	GetBitContext *	gb,
		int *	dst,
		int	len,
		int	bits
	)			`[inline, static]`

Definition at line 455 of file dca.c.

Referenced by dca_parse_audio_coding_header().

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

Definition at line 275 of file dca.c.

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

static int get_scale	(	GetBitContext *	gb,
		int	level,
		int	value,
		int	log2range
	)			`[inline, static]`

Definition at line 642 of file dca.c.

Referenced by dca_subframe_header().

static void int8x8_fmul_int32	(	float *	dst,
		const int8_t *	src,
		int	scale
	)			`[inline, static]`

Definition at line 1116 of file dca.c.

Referenced by dca_subsubframe().

static void lfe_interpolation_fir	(	DCAContext *	s,
		int	decimation_select,
		int	num_deci_sample,
		float *	samples_in,
		float *	samples_out,
		float	scale
	)			`[static]`

Definition at line 974 of file dca.c.

Referenced by dca_filter_channels().

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

Definition at line 935 of file dca.c.

Referenced by dca_filter_channels().

Variable Documentation

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

Definition at line 1113 of file dca.c.

Referenced by dca_subsubframe().

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

Definition at line 1112 of file dca.c.

Referenced by dca_subsubframe().

BitAlloc dca_bitalloc_index [static]

indexes for samples VLC select

Definition at line 270 of file dca.c.

const int8_t dca_channel_reorder_lfe[][9] [static]

Initial value:

 {
    { 0, -1, -1, -1, -1, -1, -1, -1, -1},
    { 0,  1, -1, -1, -1, -1, -1, -1, -1},
    { 0,  1, -1, -1, -1, -1, -1, -1, -1},
    { 0,  1, -1, -1, -1, -1, -1, -1, -1},
    { 0,  1, -1, -1, -1, -1, -1, -1, -1},
    { 2,  0,  1, -1, -1, -1, -1, -1, -1},
    { 0,  1,  3, -1, -1, -1, -1, -1, -1},
    { 2,  0,  1,  4, -1, -1, -1, -1, -1},
    { 0,  1,  3,  4, -1, -1, -1, -1, -1},
    { 2,  0,  1,  4,  5, -1, -1, -1, -1},
    { 3,  4,  0,  1,  5,  6, -1, -1, -1},
    { 2,  0,  1,  4,  5,  6, -1, -1, -1},
    { 0,  6,  4,  5,  2,  3, -1, -1, -1},
    { 4,  2,  5,  0,  1,  6,  7, -1, -1},
    { 5,  6,  0,  1,  7,  3,  8,  4, -1},
    { 4,  2,  5,  0,  1,  6,  8,  7, -1},
}

Definition at line 172 of file dca.c.

Referenced by dca_decode_frame(), and encode_init().

const int8_t dca_channel_reorder_lfe_xch[][9] [static]

Initial value:

 {
    { 0,  2, -1, -1, -1, -1, -1, -1, -1},
    { 0,  1,  3, -1, -1, -1, -1, -1, -1},
    { 0,  1,  3, -1, -1, -1, -1, -1, -1},
    { 0,  1,  3, -1, -1, -1, -1, -1, -1},
    { 0,  1,  3, -1, -1, -1, -1, -1, -1},
    { 2,  0,  1,  4, -1, -1, -1, -1, -1},
    { 0,  1,  3,  4, -1, -1, -1, -1, -1},
    { 2,  0,  1,  4,  5, -1, -1, -1, -1},
    { 0,  1,  4,  5,  3, -1, -1, -1, -1},
    { 2,  0,  1,  5,  6,  4, -1, -1, -1},
    { 3,  4,  0,  1,  6,  7,  5, -1, -1},
    { 2,  0,  1,  4,  5,  6,  7, -1, -1},
    { 0,  6,  4,  5,  2,  3,  7, -1, -1},
    { 4,  2,  5,  0,  1,  7,  8,  6, -1},
    { 5,  6,  0,  1,  8,  3,  9,  4,  7},
    { 4,  2,  5,  0,  1,  6,  9,  8,  7},
}

Definition at line 191 of file dca.c.

Referenced by dca_decode_frame().

const int8_t dca_channel_reorder_nolfe[][9] [static]

Initial value:

 {
    { 0, -1, -1, -1, -1, -1, -1, -1, -1},
    { 0,  1, -1, -1, -1, -1, -1, -1, -1},
    { 0,  1, -1, -1, -1, -1, -1, -1, -1},
    { 0,  1, -1, -1, -1, -1, -1, -1, -1},
    { 0,  1, -1, -1, -1, -1, -1, -1, -1},
    { 2,  0,  1, -1, -1, -1, -1, -1, -1},
    { 0,  1,  2, -1, -1, -1, -1, -1, -1},
    { 2,  0,  1,  3, -1, -1, -1, -1, -1},
    { 0,  1,  2,  3, -1, -1, -1, -1, -1},
    { 2,  0,  1,  3,  4, -1, -1, -1, -1},
    { 2,  3,  0,  1,  4,  5, -1, -1, -1},
    { 2,  0,  1,  3,  4,  5, -1, -1, -1},
    { 0,  5,  3,  4,  1,  2, -1, -1, -1},
    { 3,  2,  4,  0,  1,  5,  6, -1, -1},
    { 4,  5,  0,  1,  6,  2,  7,  3, -1},
    { 3,  2,  4,  0,  1,  5,  7,  6, -1},
}

Definition at line 210 of file dca.c.

Referenced by dca_decode_frame(), and encode_init().

const int8_t dca_channel_reorder_nolfe_xch[][9] [static]

Initial value:

 {
    { 0,  1, -1, -1, -1, -1, -1, -1, -1},
    { 0,  1,  2, -1, -1, -1, -1, -1, -1},
    { 0,  1,  2, -1, -1, -1, -1, -1, -1},
    { 0,  1,  2, -1, -1, -1, -1, -1, -1},
    { 0,  1,  2, -1, -1, -1, -1, -1, -1},
    { 2,  0,  1,  3, -1, -1, -1, -1, -1},
    { 0,  1,  2,  3, -1, -1, -1, -1, -1},
    { 2,  0,  1,  3,  4, -1, -1, -1, -1},
    { 0,  1,  3,  4,  2, -1, -1, -1, -1},
    { 2,  0,  1,  4,  5,  3, -1, -1, -1},
    { 2,  3,  0,  1,  5,  6,  4, -1, -1},
    { 2,  0,  1,  3,  4,  5,  6, -1, -1},
    { 0,  5,  3,  4,  1,  2,  6, -1, -1},
    { 3,  2,  4,  0,  1,  6,  7,  5, -1},
    { 4,  5,  0,  1,  7,  2,  8,  3,  6},
    { 3,  2,  4,  0,  1,  5,  8,  7,  6},
}

Definition at line 229 of file dca.c.

Referenced by dca_decode_frame().

const uint64_t dca_core_channel_layout[] [static]

Definition at line 131 of file dca.c.

Referenced by dca_decode_frame().

const int dca_ext_audio_descr_mask[] [static]

Initial value:

 {
    DCA_EXT_XCH,
    -1,
    DCA_EXT_X96,
    DCA_EXT_XCH | DCA_EXT_X96,
    -1,
    -1,
    DCA_EXT_XXCH,
    -1,
}

Definition at line 108 of file dca.c.

Referenced by dca_decode_frame().

const int8_t dca_lfe_index[] [static]

Initial value:

 {
    1, 2, 2, 2, 2, 3, 2, 3, 2, 3, 2, 3, 1, 3, 2, 3
}

Definition at line 168 of file dca.c.

Referenced by dca_filter_channels(), and encode_init().

BitAlloc dca_scalefactor [static]

scalefactor VLCs

Definition at line 272 of file dca.c.

BitAlloc dca_smpl_bitalloc[11] [static]

samples VLCs

Definition at line 273 of file dca.c.

BitAlloc dca_tmode [static]

transition mode VLCs

Definition at line 271 of file dca.c.

const uint16_t dca_vlc_offs[] [static]

Initial value:

 {
        0,   512,   640,   768,  1282,  1794,  2436,  3080,  3770,  4454,  5364,
     5372,  5380,  5388,  5392,  5396,  5412,  5420,  5428,  5460,  5492,  5508,
     5572,  5604,  5668,  5796,  5860,  5892,  6412,  6668,  6796,  7308,  7564,
     7820,  8076,  8620,  9132,  9388,  9910, 10166, 10680, 11196, 11726, 12240,
    12752, 13298, 13810, 14326, 14840, 15500, 16022, 16540, 17158, 17678, 18264,
    18796, 19352, 19926, 20468, 21472, 22398, 23014, 23622,
}

Definition at line 391 of file dca.c.

Referenced by dca_init_vlcs().

AVCodec ff_dca_decoder

Initial value:

 {
    .name            = "dca",
    .type            = AVMEDIA_TYPE_AUDIO,
    .id              = CODEC_ID_DTS,
    .priv_data_size  = sizeof(DCAContext),
    .init            = dca_decode_init,
    .decode          = dca_decode_frame,
    .close           = dca_decode_end,
    .long_name       = NULL_IF_CONFIG_SMALL("DCA (DTS Coherent Acoustics)"),
    .capabilities    = CODEC_CAP_CHANNEL_CONF | CODEC_CAP_DR1,
    .sample_fmts     = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLT,
                                                       AV_SAMPLE_FMT_S16,
                                                       AV_SAMPLE_FMT_NONE },
    .profiles        = NULL_IF_CONFIG_SMALL(profiles),
}

Definition at line 1990 of file dca.c.

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 1981 of file dca.c.


Data Structures
struct	BitAlloc
	Bit allocation. More...
struct	DCAContext
Defines
#define	DCA_PRIM_CHANNELS_MAX (7)
#define	DCA_SUBBANDS (32)
#define	DCA_ABITS_MAX (32)
#define	DCA_SUBSUBFRAMES_MAX (4)
#define	DCA_SUBFRAMES_MAX (16)
#define	DCA_BLOCKS_MAX (16)
#define	DCA_LFE_MAX (3)
#define	DCA_CORE_EXTS (DCA_EXT_XCH \| DCA_EXT_XXCH \| DCA_EXT_X96)
#define	DCA_DOLBY 101
#define	DCA_CHANNEL_BITS 6
#define	DCA_CHANNEL_MASK 0x3F
#define	DCA_LFE 0x80
#define	HEADER_SIZE 14
#define	DCA_MAX_FRAME_SIZE 16384
#define	DCA_MAX_EXSS_HEADER_SIZE 4096
#define	DCA_BUFFER_PADDING_SIZE 1024
#define	MIX_REAR1(samples, si1, rs, coef)
#define	MIX_REAR2(samples, si1, si2, 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	DCAExSSSpeakerMask { DCA_EXSS_FRONT_CENTER = 0x0001, DCA_EXSS_FRONT_LEFT_RIGHT = 0x0002, DCA_EXSS_SIDE_REAR_LEFT_RIGHT = 0x0004, DCA_EXSS_LFE = 0x0008, DCA_EXSS_REAR_CENTER = 0x0010, DCA_EXSS_FRONT_HIGH_LEFT_RIGHT = 0x0020, DCA_EXSS_REAR_LEFT_RIGHT = 0x0040, DCA_EXSS_FRONT_HIGH_CENTER = 0x0080, DCA_EXSS_OVERHEAD = 0x0100, DCA_EXSS_CENTER_LEFT_RIGHT = 0x0200, DCA_EXSS_WIDE_LEFT_RIGHT = 0x0400, DCA_EXSS_SIDE_LEFT_RIGHT = 0x0800, DCA_EXSS_LFE2 = 0x1000, DCA_EXSS_SIDE_HIGH_LEFT_RIGHT = 0x2000, DCA_EXSS_REAR_HIGH_CENTER = 0x4000, DCA_EXSS_REAR_HIGH_LEFT_RIGHT = 0x8000 }
enum	DCAExtensionMask { DCA_EXT_CORE = 0x001, DCA_EXT_XXCH = 0x002, DCA_EXT_X96 = 0x004, DCA_EXT_XCH = 0x008, DCA_EXT_EXSS_CORE = 0x010, DCA_EXT_EXSS_XBR = 0x020, DCA_EXT_EXSS_XXCH = 0x040, DCA_EXT_EXSS_X96 = 0x080, DCA_EXT_EXSS_LBR = 0x100, DCA_EXT_EXSS_XLL = 0x200 }
Functions
static av_always_inline int	get_bitalloc (GetBitContext gb, BitAlloc ba, int idx)
static av_cold void	dca_init_vlcs (void)
static void	get_array (GetBitContext gb, int dst, int len, int bits)
static int	dca_parse_audio_coding_header (DCAContext *s, int base_channel)
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, float scale)
static void	dca_downmix (float samples, int srcfmt, int downmix_coef[DCA_PRIM_CHANNELS_MAX][2], const int8_t channel_mapping)
static int	decode_blockcode (int code, int levels, int *values)
static int	decode_blockcodes (int code1, int code2, int levels, int *values)
static void	int8x8_fmul_int32 (float dst, const int8_t src, int scale)
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.
static int	dca_convert_bitstream (const uint8_t src, int src_size, uint8_t dst, int max_size)
	Convert bitstream to one representation based on sync marker.
static int	dca_exss_mask2count (int mask)
	Return the number of channels in an ExSS speaker mask (HD).
static void	dca_exss_skip_mix_coeffs (GetBitContext *gb, int channels, int out_ch)
	Skip mixing coefficients of a single mix out configuration (HD).
static int	dca_exss_parse_asset_header (DCAContext *s)
	Parse extension substream asset header (HD).
static void	dca_exss_parse_header (DCAContext *s)
	Parse extension substream header (HD).
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 const int	dca_ext_audio_descr_mask []
static const uint64_t	dca_core_channel_layout []
static const int8_t	dca_lfe_index []
static const int8_t	dca_channel_reorder_lfe [][9]
static const int8_t	dca_channel_reorder_lfe_xch [][9]
static const int8_t	dca_channel_reorder_nolfe [][9]
static const int8_t	dca_channel_reorder_nolfe_xch [][9]
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 uint16_t	dca_vlc_offs []
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 []
AVCodec	ff_dca_decoder