FFmpeg
Data Structures | Macros | Functions | Variables
ralf.c File Reference
#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 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.

◆ FILTER_RAW

#define FILTER_RAW   642

Definition at line 40 of file ralf.c.

◆ RALF_MAX_PKT_SIZE

#define RALF_MAX_PKT_SIZE   8192

Definition at line 51 of file ralf.c.

◆ MAX_ELEMS

#define MAX_ELEMS   644

Definition at line 74 of file ralf.c.

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 201 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 215 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 304 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 328 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 412 of file ralf.c.

◆ decode_flush()

static void decode_flush ( AVCodecContext avctx)
static

Definition at line 506 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,
.priv_data_size = sizeof(RALFContext),
.close = decode_close,
.flush = decode_flush,
.p.capabilities = AV_CODEC_CAP_CHANNEL_CONF |
.p.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 514 of file ralf.c.

decode_flush
static void decode_flush(AVCodecContext *avctx)
Definition: ralf.c:506
FF_CODEC_CAP_INIT_CLEANUP
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: codec_internal.h:42
RALFContext
Definition: ralf.c:53
decode_close
static av_cold int decode_close(AVCodecContext *avctx)
Definition: ralf.c:106
decode_init
static av_cold int decode_init(AVCodecContext *avctx)
Definition: ralf.c:127
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:298
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts_bsf.c:363
AV_CODEC_ID_RALF
@ AV_CODEC_ID_RALF
Definition: codec_id.h:492
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:264
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
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:56
AV_SAMPLE_FMT_S16P
@ AV_SAMPLE_FMT_S16P
signed 16 bits, planar
Definition: samplefmt.h:64
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:55
decode_frame
static int decode_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt)
Definition: ralf.c:412