dcadec.c File Reference

#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/channel_layout.h"
#include "libavutil/downmix_info.h"
#include "libavutil/thread.h"
#include "codec_internal.h"
#include "dcadec.h"
#include "dcadata.h"
#include "dcahuff.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)
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)
int	ff_dca_export_downmix_matrix (AVCodecContext *avctx, AVFrame *frame, enum DCADownMixType downmix_type, int output_mask, const int *coeff_l)
static int	dcadec_decode_frame (AVCodecContext *avctx, AVFrame *frame, 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 void	dcadec_init_static (void)
static av_cold int	dcadec_init (AVCodecContext *avctx)

Variables
static const uint8_t	dca2wav_norm [28]
static const uint8_t	dca2wav_wide [28]
static const AVOption	dcadec_options []
static const AVClass	dcadec_class
const FFCodec	ff_dca_decoder

Macro Definition Documentation

MIN_PACKET_SIZE

#define MIN_PACKET_SIZE   16

Definition at line 34 of file dcadec.c.

MAX_PACKET_SIZE

#define MAX_PACKET_SIZE   0x104000

Definition at line 35 of file dcadec.c.

OFFSET

#define OFFSET

(

x

)

offsetof(DCAContext, x)

Definition at line 447 of file dcadec.c.

PARAM

#define PARAM   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM

Definition at line 448 of file dcadec.c.

Function Documentation

ff_dca_set_channel_layout()

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

Definition at line 48 of file dcadec.c.

Referenced by ff_dca_core_filter_frame(), and ff_dca_xll_filter_frame().

ff_dca_downmix_to_stereo_fixed()

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

Definition at line 97 of file dcadec.c.

Referenced by ff_dca_xll_filter_frame(), and filter_frame_fixed().

ff_dca_downmix_to_stereo_float()

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

Definition at line 128 of file dcadec.c.

Referenced by filter_frame_float().

ff_dca_export_downmix_matrix()

int ff_dca_export_downmix_matrix	(	AVCodecContext *	avctx,
		AVFrame *	frame,
		enum DCADownMixType	downmix_type,
		int	output_mask,
		const int *	coeff_l
	)

Definition at line 162 of file dcadec.c.

Referenced by ff_dca_core_filter_frame(), and ff_dca_xll_filter_frame().

dcadec_decode_frame()

static int dcadec_decode_frame ( AVCodecContext *  avctx, AVFrame *  frame, int *  got_frame_ptr, AVPacket *  avpkt  )

static

Definition at line 218 of file dcadec.c.

dcadec_flush()

static av_cold void dcadec_flush ( AVCodecContext *  avctx )

static

Definition at line 368 of file dcadec.c.

dcadec_close()

static av_cold int dcadec_close ( AVCodecContext *  avctx )

static

Definition at line 379 of file dcadec.c.

dcadec_init_static()

static av_cold void dcadec_init_static ( void  )

static

Definition at line 393 of file dcadec.c.

Referenced by dcadec_init().

dcadec_init()

static av_cold int dcadec_init ( AVCodecContext *  avctx )

static

Definition at line 399 of file dcadec.c.

Variable Documentation

dca2wav_norm

const uint8_t dca2wav_norm[28]

static

Initial value:

= {
     2,  0, 1, 9, 10,  3,  8,  4,  5,  9, 10, 6, 7, 12,
    13, 14, 3, 6,  7, 11, 12, 14, 16, 15, 17, 8, 4,  5,
}

Definition at line 38 of file dcadec.c.

Referenced by ff_dca_export_downmix_matrix(), and ff_dca_set_channel_layout().

dca2wav_wide

const uint8_t dca2wav_wide[28]

static

Initial value:

= {
     2,  0, 1, 4,  5,  3,  8,  4,  5,  9, 10, 6, 7, 12,
    13, 14, 3, 6,  7, 11, 12, 14, 16, 15, 17, 8, 4,  5,
}

Definition at line 43 of file dcadec.c.

Referenced by ff_dca_export_downmix_matrix(), and ff_dca_set_channel_layout().

dcadec_options

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 },
 
    { "channel_order", "Order in which the channels are to be exported",
        OFFSET(output_channel_order), AV_OPT_TYPE_INT,
        { .i64 = CHANNEL_ORDER_DEFAULT }, 0, 1, PARAM, .unit = "channel_order" },
      { "default", "normal libavcodec channel order", 0, AV_OPT_TYPE_CONST,
        { .i64 = CHANNEL_ORDER_DEFAULT }, .flags = PARAM, .unit = "channel_order" },
      { "coded",    "order in which the channels are coded in the bitstream",
        0, AV_OPT_TYPE_CONST, { .i64 = CHANNEL_ORDER_CODED }, .flags = PARAM, .unit = "channel_order" },
 
    { "downmix", "Request a specific channel layout from the decoder", OFFSET(downmix_layout),
        AV_OPT_TYPE_CHLAYOUT, {.str = NULL}, .flags = PARAM },
 
    { NULL }
}

Definition at line 450 of file dcadec.c.

dcadec_class

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 467 of file dcadec.c.

ff_dca_decoder

const FFCodec ff_dca_decoder

Initial value:

= {
    .p.name         = "dca",
    CODEC_LONG_NAME("DCA (DTS Coherent Acoustics)"),
    .p.type         = AVMEDIA_TYPE_AUDIO,
    .p.id           = AV_CODEC_ID_DTS,
    .priv_data_size = sizeof(DCAContext),
    .init           = dcadec_init,
    FF_CODEC_DECODE_CB(dcadec_decode_frame),
    .close          = dcadec_close,
    .flush          = dcadec_flush,
    .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
    .p.priv_class   = &dcadec_class,
    .p.profiles     = NULL_IF_CONFIG_SMALL(ff_dca_profiles),
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 475 of file dcadec.c.