tta.c File Reference

TTA (The Lossless True Audio) decoder. More...

#include <limits.h>
#include "libavutil/crc.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "ttadata.h"
#include "ttadsp.h"
#include "avcodec.h"
#include "get_bits.h"
#include "thread.h"
#include "unary.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	TTAContext

Macros
#define	BITSTREAM_READER_LE
#define	FORMAT_SIMPLE   1
#define	FORMAT_ENCRYPTED   2
#define	PRED(x, k)   (int32_t)((((uint64_t)(x) << (k)) - (x)) >> (k))
#define	OFFSET(x)   offsetof(TTAContext, x)
#define	DEC   (AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM)

Functions
static int	tta_check_crc (TTAContext *s, const uint8_t *buf, int buf_size)
static uint64_t	tta_check_crc64 (uint8_t *pass)
static int	allocate_buffers (AVCodecContext *avctx)
static av_cold int	tta_decode_init (AVCodecContext *avctx)
static int	tta_decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
static int	init_thread_copy (AVCodecContext *avctx)
static av_cold int	tta_decode_close (AVCodecContext *avctx)

Variables
static const int64_t	tta_channel_layouts [7]
static const AVOption	options []
static const AVClass	tta_decoder_class
AVCodec	ff_tta_decoder

Detailed Description

TTA (The Lossless True Audio) decoder.

See also

http://www.true-audio.com/

http://tta.corecodec.org/

Author

Alex Beregszaszi

Definition in file tta.c.

Macro Definition Documentation

BITSTREAM_READER_LE

#define BITSTREAM_READER_LE

Definition at line 36 of file tta.c.

FORMAT_SIMPLE

#define FORMAT_SIMPLE   1

Definition at line 45 of file tta.c.

FORMAT_ENCRYPTED

#define FORMAT_ENCRYPTED   2

Definition at line 46 of file tta.c.

Referenced by tta_decode_frame(), and tta_decode_init().

PRED

#define PRED	(		x,
			k
	)		(int32_t)((((uint64_t)(x) << (k)) - (x)) >> (k))

Referenced by tta_decode_frame().

OFFSET

#define OFFSET

(

x

)

offsetof(TTAContext, x)

Definition at line 410 of file tta.c.

DEC

#define DEC   (AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM)

Definition at line 411 of file tta.c.

Function Documentation

tta_check_crc()

static int tta_check_crc ( TTAContext *  s, const uint8_t *  buf, int  buf_size  )

static

Definition at line 75 of file tta.c.

Referenced by tta_decode_frame().

tta_check_crc64()

static uint64_t tta_check_crc64 ( uint8_t *  pass )

static

Definition at line 89 of file tta.c.

Referenced by tta_decode_init().

allocate_buffers()

static int allocate_buffers ( AVCodecContext *  avctx )

static

Definition at line 104 of file tta.c.

Referenced by init_thread_copy(), and tta_decode_init().

tta_decode_init()

static av_cold int tta_decode_init ( AVCodecContext *  avctx )

static

Definition at line 123 of file tta.c.

tta_decode_frame()

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

static

Definition at line 219 of file tta.c.

init_thread_copy()

static int init_thread_copy ( AVCodecContext *  avctx )

static

Definition at line 392 of file tta.c.

Referenced by alac_decode_init(), decode_end(), decode_frame(), decode_init(), ff_vp8_decode_init(), flac_decode_frame(), png_dec_end(), read_huffman_tree(), tak_decode_frame(), and wv_alloc_frame_context().

tta_decode_close()

static av_cold int tta_decode_close ( AVCodecContext *  avctx )

static

Definition at line 399 of file tta.c.

Variable Documentation

tta_channel_layouts

const int64_t tta_channel_layouts[7]

static

Initial value:

= {
    AV_CH_LAYOUT_STEREO,
    AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY,
    AV_CH_LAYOUT_QUAD,
    0,
    AV_CH_LAYOUT_5POINT1_BACK,
    AV_CH_LAYOUT_5POINT1_BACK|AV_CH_BACK_CENTER,
    AV_CH_LAYOUT_7POINT1_WIDE
}

Definition at line 65 of file tta.c.

Referenced by tta_decode_init().

options

const AVOption options[]

static

Initial value:

= {
    { "password", "Set decoding password", OFFSET(pass), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, DEC },
    { NULL },
}

Definition at line 412 of file tta.c.

tta_decoder_class

const AVClass tta_decoder_class

static

Initial value:

= {
    .class_name = "TTA Decoder",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 417 of file tta.c.

ff_tta_decoder

AVCodec ff_tta_decoder

Initial value:

= {
    .name           = "tta",
    .long_name      = NULL_IF_CONFIG_SMALL("TTA (True Audio)"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_TTA,
    .priv_data_size = sizeof(TTAContext),
    .init           = tta_decode_init,
    .close          = tta_decode_close,
    .decode         = tta_decode_frame,
    .init_thread_copy = ONLY_IF_THREADS_ENABLED(init_thread_copy),
    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
    .priv_class     = &tta_decoder_class,
}

Definition at line 424 of file tta.c.