FFmpeg
Data Structures | Macros | Functions | Variables
tta.c File Reference
#include <limits.h>
#include "libavutil/channel_layout.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 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
 
const 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 37 of file tta.c.

◆ FORMAT_SIMPLE

#define FORMAT_SIMPLE   1

Definition at line 46 of file tta.c.

◆ FORMAT_ENCRYPTED

#define FORMAT_ENCRYPTED   2

Definition at line 47 of file tta.c.

◆ PRED

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

◆ OFFSET

#define OFFSET (   x)    offsetof(TTAContext, x)

Definition at line 405 of file tta.c.

◆ DEC

Definition at line 406 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 76 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 90 of file tta.c.

Referenced by tta_decode_init().

◆ allocate_buffers()

static int allocate_buffers ( AVCodecContext avctx)
static

Definition at line 105 of file tta.c.

Referenced by tta_decode_init().

◆ tta_decode_init()

static av_cold int tta_decode_init ( AVCodecContext avctx)
static

Definition at line 125 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 221 of file tta.c.

◆ tta_decode_close()

static av_cold int tta_decode_close ( AVCodecContext avctx)
static

Definition at line 394 of file tta.c.

Variable Documentation

◆ tta_channel_layouts

const int64_t tta_channel_layouts[7]
static

◆ 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 407 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,
}

Definition at line 412 of file tta.c.

◆ ff_tta_decoder

const AVCodec ff_tta_decoder
Initial value:
= {
.name = "tta",
.long_name = NULL_IF_CONFIG_SMALL("TTA (True Audio)"),
.priv_data_size = sizeof(TTAContext),
.close = tta_decode_close,
.priv_class = &tta_decoder_class,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
}

Definition at line 419 of file tta.c.

FF_CODEC_CAP_INIT_THREADSAFE
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:42
TTAContext
Definition: tta.c:49
init
static int init
Definition: av_tx.c:47
tta_decoder_class
static const AVClass tta_decoder_class
Definition: tta.c:412
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:91
AV_CH_LAYOUT_QUAD
#define AV_CH_LAYOUT_QUAD
Definition: channel_layout.h:99
AV_CODEC_ID_TTA
@ AV_CODEC_ID_TTA
Definition: codec_id.h:445
AV_CH_LOW_FREQUENCY
#define AV_CH_LOW_FREQUENCY
Definition: channel_layout.h:52
decode
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
tta_decode_init
static av_cold int tta_decode_init(AVCodecContext *avctx)
Definition: tta.c:125
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
pass
#define pass
Definition: fft_template.c:601
AV_CODEC_CAP_FRAME_THREADS
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:113
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
NULL
#define NULL
Definition: coverity.c:32
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
DEC
#define DEC
Definition: tta.c:406
AV_CODEC_CAP_CHANNEL_CONF
#define AV_CODEC_CAP_CHANNEL_CONF
Codec should fill in channel configuration and samplerate instead of container.
Definition: codec.h:109
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
AV_CH_LAYOUT_5POINT1_BACK
#define AV_CH_LAYOUT_5POINT1_BACK
Definition: channel_layout.h:103
tta_decode_frame
static int tta_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
Definition: tta.c:221
AV_CH_BACK_CENTER
#define AV_CH_BACK_CENTER
Definition: channel_layout.h:57
AV_CH_LAYOUT_7POINT1_WIDE
#define AV_CH_LAYOUT_7POINT1_WIDE
Definition: channel_layout.h:113
tta_decode_close
static av_cold int tta_decode_close(AVCodecContext *avctx)
Definition: tta.c:394
OFFSET
#define OFFSET(x)
Definition: tta.c:405
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:228
options
static const AVOption options[]
Definition: tta.c:407