ralf.c File Reference

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

#include "libavutil/attributes.h"
#include "libavutil/channel_layout.h"
#include "avcodec.h"
#include "get_bits.h"
#include "golomb.h"
#include "internal.h"
#include "unary.h"
#include "ralfdata.h"

Go to the source code of this file.

Data Structures
struct	VLCSet
struct	RALFContext

Macros
#define	FILTER_NONE   0
#define	FILTER_RAW   642
#define	RALF_MAX_PKT_SIZE   8192
#define	MAX_ELEMS   644

Functions
static av_cold 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 *dst0, int16_t *dst1)
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.

Macro Definition Documentation

#define FILTER_NONE   0

Definition at line 38 of file ralf.c.

Referenced by decode_channel().

#define FILTER_RAW   642

Definition at line 39 of file ralf.c.

Referenced by decode_block(), and decode_channel().

#define RALF_MAX_PKT_SIZE   8192

Definition at line 50 of file ralf.c.

Referenced by decode_frame().

#define MAX_ELEMS   644

Definition at line 74 of file ralf.c.

Referenced by init_ralf_vlc().

Function Documentation

static av_cold 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().

static av_cold int decode_close ( AVCodecContext *  avctx )

static

Definition at line 106 of file ralf.c.

Referenced by decode_init().

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  )

inlinestatic

Definition at line 213 of file ralf.c.

Referenced by decode_channel().

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

static

Definition at line 227 of file ralf.c.

Referenced by decode_block().

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

static

Definition at line 314 of file ralf.c.

Referenced by decode_block().

static int decode_block ( AVCodecContext *  avctx, GetBitContext *  gb, int16_t *  dst0, int16_t *  dst1  )

static

Definition at line 338 of file ralf.c.

Referenced by decode_frame().

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

static

Definition at line 421 of file ralf.c.

static void decode_flush ( AVCodecContext *  avctx )

static

Definition at line 515 of file ralf.c.

Variable Documentation

AVCodec ff_ralf_decoder

Initial value:

= {
    .name           = "ralf",
    .long_name      = NULL_IF_CONFIG_SMALL("RealAudio Lossless"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_RALF,
    .priv_data_size = sizeof(RALFContext),
    .init           = decode_init,
    .close          = decode_close,
    .decode         = decode_frame,
    .flush          = decode_flush,
    .capabilities   = CODEC_CAP_DR1,
    .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
                                                      AV_SAMPLE_FMT_NONE },
}

Definition at line 523 of file ralf.c.