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 "codec_internal.h"
#include "decode.h"
#include "get_bits.h"
#include "golomb.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, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt)
static av_cold void	decode_flush (AVCodecContext *avctx)

Variables
const FFCodec	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

FILTER_NONE

#define FILTER_NONE   0

Definition at line 39 of file ralf.c.

Referenced by decode_channel(), filter_frame(), and init().

FILTER_RAW

#define FILTER_RAW   642

Definition at line 40 of file ralf.c.

Referenced by decode_block(), and decode_channel().

RALF_MAX_PKT_SIZE

#define RALF_MAX_PKT_SIZE   8192

Definition at line 51 of file ralf.c.

Referenced by decode_frame().

MAX_ELEMS

#define MAX_ELEMS   644

Definition at line 74 of file ralf.c.

Referenced by init_ralf_vlc().

Function Documentation

init_ralf_vlc()

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().

decode_close()

static av_cold int decode_close ( AVCodecContext * avctx )

static

Definition at line 106 of file ralf.c.

decode_init()

static av_cold int decode_init ( AVCodecContext * avctx )

static

Definition at line 127 of file ralf.c.

extend_code()

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

inlinestatic

Definition at line 202 of file ralf.c.

Referenced by decode_channel().

decode_channel()

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

static

Definition at line 216 of file ralf.c.

Referenced by decode_block().

apply_lpc()

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

static

Definition at line 305 of file ralf.c.

Referenced by decode_block().

decode_block()

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

static

Definition at line 329 of file ralf.c.

Referenced by decode_frame().

decode_frame()

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

static

Definition at line 413 of file ralf.c.

decode_flush()

static av_cold void decode_flush ( AVCodecContext * avctx )

static

Definition at line 507 of file ralf.c.

Variable Documentation

ff_ralf_decoder

const FFCodec ff_ralf_decoder

Initial value:

= {
    .p.name         = "ralf",
    CODEC_LONG_NAME("RealAudio Lossless"),
    .p.type         = AVMEDIA_TYPE_AUDIO,
    .p.id           = AV_CODEC_ID_RALF,
    .priv_data_size = sizeof(RALFContext),
    .init           = decode_init,
    .close          = decode_close,
    FF_CODEC_DECODE_CB(decode_frame),
    .flush          = decode_flush,
    .p.capabilities = AV_CODEC_CAP_CHANNEL_CONF |
                      AV_CODEC_CAP_DR1,
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 515 of file ralf.c.