libavcodec/ralf.c File Reference

This is a decoder for Real Audio Lossless format. More...

#include "avcodec.h"
#include "get_bits.h"
#include "golomb.h"
#include "unary.h"
#include "libavutil/audioconvert.h"
#include "ralfdata.h"

Go to the source code of this file.

Data Structures
struct	VLCSet
struct	RALFContext
Defines
#define	FILTER_NONE   0
#define	FILTER_RAW   642
#define	RALF_MAX_PKT_SIZE   8192
#define	MAX_ELEMS   644
Functions
static int	init_ralf_vlc (VLC *vlc, const uint8_t *data, int elems)
static av_cold int	decode_close (AVCodecContext *avctx)
static av_cold int	decode_init (AVCodecContext *avctx)
static int	extend_code (GetBitContext *gb, int val, int range, int bits)
static int	decode_channel (RALFContext *ctx, GetBitContext *gb, int ch, int length, int mode, int bits)
static void	apply_lpc (RALFContext *ctx, int ch, int length, int bits)
static int	decode_block (AVCodecContext *avctx, GetBitContext *gb, int16_t *dst)
static int	decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
static void	decode_flush (AVCodecContext *avctx)
Variables
AVCodec	ff_ralf_decoder

---

Detailed Description

This is a decoder for Real Audio Lossless format.

Dedicated to the mastermind behind it, Ralph Wiggum.

Definition in file ralf.c.

---

Define Documentation

#define FILTER_NONE   0

Definition at line 36 of file ralf.c.

Referenced by decode_channel().

#define FILTER_RAW   642

Definition at line 37 of file ralf.c.

Referenced by decode_block(), and decode_channel().

#define MAX_ELEMS   644

Definition at line 74 of file ralf.c.

Referenced by init_ralf_vlc().

#define RALF_MAX_PKT_SIZE   8192

Definition at line 48 of file ralf.c.

Referenced by decode_frame().

---

Function Documentation

static void apply_lpc	(	RALFContext *	ctx,
		int	ch,
		int	length,
		int	bits
	)			[static]

Definition at line 317 of file ralf.c.

Referenced by decode_block().

static int decode_block	(	AVCodecContext *	avctx,
		GetBitContext *	gb,
		int16_t *	dst
	)			[static]

Definition at line 341 of file ralf.c.

static int decode_channel	(	RALFContext *	ctx,
		GetBitContext *	gb,
		int	ch,
		int	length,
		int	mode,
		int	bits
	)			[static]

Definition at line 230 of file ralf.c.

Referenced by decode_block().

static av_cold int decode_close

(

AVCodecContext *

avctx

)

[static]

Definition at line 106 of file ralf.c.

static void decode_flush

(

AVCodecContext *

avctx

)

[static]

Definition at line 517 of file ralf.c.

static int decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	got_frame_ptr,
		AVPacket *	avpkt
	)			[static]

Definition at line 423 of file ralf.c.

static av_cold int decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 127 of file ralf.c.

static int extend_code	(	GetBitContext *	gb,
		int	val,
		int	range,
		int	bits
	)			[inline, static]

Definition at line 216 of file ralf.c.

Referenced by decode_channel().

static int init_ralf_vlc	(	VLC *	vlc,
		const uint8_t *	data,
		int	elems
	)			[static]

Definition at line 76 of file ralf.c.

Referenced by decode_init().

---

Variable Documentation

AVCodec ff_ralf_decoder

Initial value:

 {
    .name           = "ralf",
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = CODEC_ID_RALF,
    .priv_data_size = sizeof(RALFContext),
    .init           = decode_init,
    .close          = decode_close,
    .decode         = decode_frame,
    .flush          = decode_flush,
    .capabilities   = CODEC_CAP_DR1,
    .long_name      = NULL_IF_CONFIG_SMALL("RealAudio Lossless"),
}

Definition at line 525 of file ralf.c.