apedec.c File Reference

Monkey's Audio lossless audio decoder. More...

#include <inttypes.h>
#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "lossless_audiodsp.h"
#include "avcodec.h"
#include "bswapdsp.h"
#include "bytestream.h"
#include "internal.h"
#include "get_bits.h"
#include "unary.h"

Classes
struct	APEFilter
	Filters applied to the decoded data. More...
struct	APERice
struct	APERangecoder
struct	APEPredictor
	Filter histories. More...
struct	APEContext
	Decoder context. More...

Macros
#define	MAX_CHANNELS   2
#define	MAX_BYTESPERSAMPLE   3
#define	APE_FRAMECODE_MONO_SILENCE   1
#define	APE_FRAMECODE_STEREO_SILENCE   3
#define	APE_FRAMECODE_PSEUDO_STEREO   4
#define	HISTORY_SIZE   512
#define	PREDICTOR_ORDER   8
#define	PREDICTOR_SIZE   50
	Total size of all predictor histories.
#define	YDELAYA   (18 + PREDICTOR_ORDER*4)
#define	YDELAYB   (18 + PREDICTOR_ORDER*3)
#define	XDELAYA   (18 + PREDICTOR_ORDER*2)
#define	XDELAYB   (18 + PREDICTOR_ORDER)
#define	YADAPTCOEFFSA   18
#define	XADAPTCOEFFSA   14
#define	YADAPTCOEFFSB   10
#define	XADAPTCOEFFSB   5
#define	APE_FILTER_LEVELS   3
#define	OFFSET(x)   offsetof(APEContext, x)
#define	PAR   (AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM)

Typedefs
typedef struct APEFilter	APEFilter
	Filters applied to the decoded data.
typedef struct APERice	APERice
typedef struct APERangecoder	APERangecoder
typedef struct APEPredictor	APEPredictor
	Filter histories.
typedef struct APEContext	APEContext
	Decoder context.

Enumerations
enum	APECompressionLevel {   COMPRESSION_LEVEL_FAST = 1000, COMPRESSION_LEVEL_NORMAL = 2000, COMPRESSION_LEVEL_HIGH = 3000, COMPRESSION_LEVEL_EXTRA_HIGH = 4000,   COMPRESSION_LEVEL_INSANE = 5000 }
	Possible compression levels.

Variables
AVCodec	ff_ape_decoder

APE range decoding functions
#define	CODE_BITS   32
#define	TOP_VALUE   ((unsigned int)1 << (CODE_BITS-1))
#define	SHIFT_BITS   (CODE_BITS - 9)
#define	EXTRA_BITS   ((CODE_BITS-2) % 8 + 1)
#define	BOTTOM_VALUE   (TOP_VALUE >> 8)
#define	MODEL_ELEMENTS   64

Detailed Description

Monkey's Audio lossless audio decoder.

Variable Documentation

ff_ape_decoder

AVCodec ff_ape_decoder

Initial value:

= {
    .name           = "ape",
    .long_name      = NULL_IF_CONFIG_SMALL("Monkey's Audio"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_APE,
    .priv_data_size = sizeof(APEContext),
    .init           = ape_decode_init,
    .close          = ape_decode_close,
    .decode         = ape_decode_frame,
    .capabilities   = AV_CODEC_CAP_SUBFRAMES | AV_CODEC_CAP_DELAY |
                      AV_CODEC_CAP_DR1,
    .flush          = ape_flush,
    .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_U8P,
                                                      AV_SAMPLE_FMT_S16P,
                                                      AV_SAMPLE_FMT_S32P,
                                                      AV_SAMPLE_FMT_NONE },
    .priv_class     = &ape_decoder_class,
}