#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/avassert.h"
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"
#include "put_bits.h"
#include "dcaenc.h"
#include "dcadata.h"
#include "dca.h"

Data Structures
struct	DCAContext

Macros
#define	MAX_CHANNELS 6

#define	DCA_SUBBANDS_32 32

#define	DCA_MAX_FRAME_SIZE 16383

#define	DCA_HEADER_SIZE 13

#define	DCA_SUBBANDS 32
	Subband activity count.

#define	QUANTIZER_BITS 16

#define	SUBFRAMES 1

#define	SUBSUBFRAMES 4

#define	PCM_SAMPLES (SUBFRAMESSUBSUBFRAMES8)

#define	LFE_BITS 8

#define	LFE_INTERPOLATION 64

#define	LFE_PRESENT 2

#define	LFE_MISSING 0

Functions
static int32_t	mul32 (int32_t a, int32_t b)

static void	qmf_init (void)

static int32_t	band_delta_factor (int band, int sample_num)

static void	add_new_samples (DCAContext c, const int32_t in, int count, int channel)

static void	qmf_decompose (DCAContext *c, int32_t in[32], int32_t out[32], int channel)

static int	lfe_downsample (DCAContext *c, int32_t in[LFE_INTERPOLATION])

static void	init_lfe_fir (void)

static void	put_frame_header (DCAContext *c)

static void	put_primary_audio_header (DCAContext *c)

static uint32_t	quantize (int32_t sample, int bits)
	8-23 bits quantization

static int	find_scale_factor7 (int64_t max_value, int bits)

static void	put_sample7 (DCAContext *c, int64_t sample, int bits, int scale_factor)

static void	put_subframe (DCAContext c, int32_t subband_data[8 SUBSUBFRAMES][MAX_CHANNELS][32], int subframe)

static void	put_frame (DCAContext c, int32_t subband_data[PCM_SAMPLES][MAX_CHANNELS][32], uint8_t frame)

static int	encode_frame (AVCodecContext avctx, AVPacket avpkt, const AVFrame frame, int got_packet_ptr)

static int	encode_init (AVCodecContext *avctx)

Variables
static const int8_t	dca_lfe_index []

static const int8_t	dca_channel_reorder_lfe [][9]

static const int8_t	dca_channel_reorder_nolfe [][9]

static int32_t	cos_table [128]

static int32_t	lfe_fir_64i [512]

AVCodec	ff_dca_encoder

Macro Definition Documentation

#define MAX_CHANNELS 6

Definition at line 37 of file dcaenc.c.

#define DCA_SUBBANDS_32 32

Definition at line 38 of file dcaenc.c.

Referenced by qmf_decompose().

#define DCA_MAX_FRAME_SIZE 16383

Definition at line 39 of file dcaenc.c.

Referenced by encode_frame(), and put_frame().

#define DCA_HEADER_SIZE 13

Definition at line 40 of file dcaenc.c.

Referenced by encode_frame(), and put_frame().

#define DCA_SUBBANDS 32

Subband activity count.

Definition at line 42 of file dcaenc.c.

Referenced by put_primary_audio_header(), and put_subframe().

#define QUANTIZER_BITS 16

Definition at line 43 of file dcaenc.c.

Referenced by put_subframe().

#define SUBFRAMES 1

Definition at line 44 of file dcaenc.c.

Referenced by formant_postfilter(), g723_1_decode_frame(), generate_noise(), lsp_interpolate(), put_frame(), put_primary_audio_header(), and unpack_bitstream().

#define SUBSUBFRAMES 4

Definition at line 45 of file dcaenc.c.

Referenced by put_frame(), and put_subframe().

#define PCM_SAMPLES (SUBFRAMES*SUBSUBFRAMES*8)

Definition at line 46 of file dcaenc.c.

Referenced by encode_frame(), encode_init(), and put_frame_header().

#define LFE_BITS 8

Definition at line 47 of file dcaenc.c.

Referenced by put_subframe().

#define LFE_INTERPOLATION 64

Definition at line 48 of file dcaenc.c.

Referenced by encode_frame().

#define LFE_PRESENT 2

Definition at line 49 of file dcaenc.c.

Referenced by encode_init().

#define LFE_MISSING 0

Definition at line 50 of file dcaenc.c.

Referenced by encode_init().

Function Documentation

static int32_t mul32	(	int32_t	a,
		int32_t	b
	)

inlinestatic

Definition at line 118 of file dcaenc.c.

Referenced by lfe_downsample(), qmf_decompose(), and qmf_init().

static void qmf_init ( void )

static

Definition at line 127 of file dcaenc.c.

Referenced by encode_init().

static int32_t band_delta_factor	(	int	band,
		int	sample_num
	)

static

Definition at line 151 of file dcaenc.c.

Referenced by qmf_decompose().

static void add_new_samples	(	DCAContext *	c,
		const int32_t *	in,
		int	count,
		int	channel
	)

static

Definition at line 160 of file dcaenc.c.

Referenced by lfe_downsample(), and qmf_decompose().

static void qmf_decompose	(	DCAContext *	c,
		int32_t	in[32],
		int32_t	out[32],
		int	channel
	)

static

Definition at line 176 of file dcaenc.c.

Referenced by encode_frame().

static int lfe_downsample	(	DCAContext *	c,
		int32_t	in[LFE_INTERPOLATION]
	)

static

Definition at line 206 of file dcaenc.c.

Referenced by encode_frame().

static void init_lfe_fir ( void )

static

Definition at line 220 of file dcaenc.c.

Referenced by encode_init().

static void put_frame_header ( DCAContext * c )

static

Definition at line 232 of file dcaenc.c.

Referenced by put_frame().

static void put_primary_audio_header ( DCAContext * c )

static

Definition at line 315 of file dcaenc.c.

Referenced by put_frame().

static uint32_t quantize	(	int32_t	sample,
		int	bits
	)

inlinestatic

8-23 bits quantization

Parameters

sample
bits

Definition at line 366 of file dcaenc.c.

Referenced by put_sample7().

static int find_scale_factor7	(	int64_t	max_value,
		int	bits
	)

inlinestatic

Definition at line 373 of file dcaenc.c.

Referenced by put_subframe().

static void put_sample7	(	DCAContext *	c,
		int64_t	sample,
		int	bits,
		int	scale_factor
	)

inlinestatic

Definition at line 388 of file dcaenc.c.

Referenced by put_subframe().

static void put_subframe	(	DCAContext *	c,
		int32_t	subband_data[8 *SUBSUBFRAMES][MAX_CHANNELS][32],
		int	subframe
	)

static

Definition at line 395 of file dcaenc.c.

Referenced by put_frame().

static void put_frame	(	DCAContext *	c,
		int32_t	subband_data[PCM_SAMPLES][MAX_CHANNELS][32],
		uint8_t *	frame
	)

static

Definition at line 474 of file dcaenc.c.

Referenced by encode_frame().

static int encode_frame	(	AVCodecContext *	avctx,
		AVPacket *	avpkt,
		const AVFrame *	frame,
		int *	got_packet_ptr
	)

static

Definition at line 493 of file dcaenc.c.

static int encode_init ( AVCodecContext * avctx )

static

Definition at line 534 of file dcaenc.c.

Variable Documentation

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 52 of file dcaenc.c.

Referenced by encode_init().

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

Definition at line 56 of file dcaenc.c.

Referenced by encode_init().

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

Definition at line 75 of file dcaenc.c.

Referenced by encode_init().

int32_t cos_table[128]

static

Definition at line 116 of file dcaenc.c.

Referenced by band_delta_factor(), encode_init(), and qmf_init().

int32_t lfe_fir_64i[512]

static

Definition at line 205 of file dcaenc.c.

Referenced by init_lfe_fir(), and lfe_downsample().

AVCodec ff_dca_encoder

Initial value:

= {
    .name           = "dca",
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_DTS,
    .priv_data_size = sizeof(DCAContext),
    .init           = encode_init,
    .encode2        = encode_frame,
    .capabilities   = CODEC_CAP_EXPERIMENTAL,
    .sample_fmts    = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
                                                     AV_SAMPLE_FMT_NONE },
    .long_name      = NULL_IF_CONFIG_SMALL("DCA (DTS Coherent Acoustics)"),
}

Definition at line 592 of file dcaenc.c.

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

Function Documentation

Variable Documentation