dcadec.c File Reference

#include "libavutil/opt.h"
#include "libavutil/channel_layout.h"
#include "dcadec.h"
#include "dcamath.h"
#include "dca_syncwords.h"
#include "profiles.h"

Go to the source code of this file.

Macros
#define	MIN_PACKET_SIZE   16
#define	MAX_PACKET_SIZE   0x104000
#define	OFFSET(x)   offsetof(DCAContext, x)
#define	PARAM   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM

Functions
int	ff_dca_set_channel_layout (AVCodecContext *avctx, int *ch_remap, int dca_mask)
static uint16_t	crc16 (const uint8_t *data, int size)
int	ff_dca_check_crc (GetBitContext *s, int p1, int p2)
void	ff_dca_downmix_to_stereo_fixed (DCADSPContext *dcadsp, int32_t **samples, int *coeff_l, int nsamples, int ch_mask)
void	ff_dca_downmix_to_stereo_float (AVFloatDSPContext *fdsp, float **samples, int *coeff_l, int nsamples, int ch_mask)
static int	convert_bitstream (const uint8_t *src, int src_size, uint8_t *dst, int max_size)
static int	dcadec_decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
static av_cold void	dcadec_flush (AVCodecContext *avctx)
static av_cold int	dcadec_close (AVCodecContext *avctx)
static av_cold int	dcadec_init (AVCodecContext *avctx)

Variables
static const AVOption	dcadec_options []
static const AVClass	dcadec_class
AVCodec	ff_dca_decoder

Macro Definition Documentation

#define MIN_PACKET_SIZE   16

Definition at line 29 of file dcadec.c.

Referenced by dcadec_decode_frame().

#define MAX_PACKET_SIZE   0x104000

Definition at line 30 of file dcadec.c.

Referenced by dcadec_decode_frame().

#define OFFSET

(

x

)

offsetof(DCAContext, x)

Definition at line 385 of file dcadec.c.

#define PARAM   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM

Definition at line 386 of file dcadec.c.

Function Documentation

int ff_dca_set_channel_layout	(	AVCodecContext *	avctx,
		int *	ch_remap,
		int	dca_mask
	)

Definition at line 32 of file dcadec.c.

Referenced by ff_dca_core_filter_frame(), and ff_dca_xll_filter_frame().

static uint16_t crc16 ( const uint8_t *  data, int  size  )

static

Definition at line 79 of file dcadec.c.

Referenced by ff_dca_check_crc().

int ff_dca_check_crc	(	GetBitContext *	s,
		int	p1,
		int	p2
	)

Definition at line 97 of file dcadec.c.

Referenced by chs_parse_header(), ff_dca_exss_parse(), parse_aux_data(), parse_coding_header(), parse_common_header(), parse_navi_table(), parse_optional_info(), parse_x96_coding_header(), parse_x96_frame_exss(), parse_xbr_frame(), and parse_xxch_frame().

void ff_dca_downmix_to_stereo_fixed	(	DCADSPContext *	dcadsp,
		int32_t **	samples,
		int *	coeff_l,
		int	nsamples,
		int	ch_mask
	)

Definition at line 106 of file dcadec.c.

Referenced by ff_dca_xll_filter_frame(), and filter_frame_fixed().

void ff_dca_downmix_to_stereo_float	(	AVFloatDSPContext *	fdsp,
		float **	samples,
		int *	coeff_l,
		int	nsamples,
		int	ch_mask
	)

Definition at line 137 of file dcadec.c.

Referenced by filter_frame_float().

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

static

Definition at line 171 of file dcadec.c.

Referenced by dcadec_decode_frame().

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

static

Definition at line 187 of file dcadec.c.

static av_cold void dcadec_flush ( AVCodecContext *  avctx )

static

Definition at line 321 of file dcadec.c.

static av_cold int dcadec_close ( AVCodecContext *  avctx )

static

Definition at line 331 of file dcadec.c.

static av_cold int dcadec_init ( AVCodecContext *  avctx )

static

Definition at line 344 of file dcadec.c.

Variable Documentation

const AVOption dcadec_options[]

static

Initial value:

= {
    { "core_only", "Decode core only without extensions", OFFSET(core_only), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, PARAM },
    { NULL }
}

Definition at line 388 of file dcadec.c.

const AVClass dcadec_class

static

Initial value:

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

Definition at line 393 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           = dcadec_init,
    .decode         = dcadec_decode_frame,
    .close          = dcadec_close,
    .flush          = dcadec_flush,
    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
    .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P, AV_SAMPLE_FMT_S32P,
                                                      AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE },
    .priv_class     = &dcadec_class,
    .profiles       = NULL_IF_CONFIG_SMALL(ff_dca_profiles),
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 401 of file dcadec.c.