wavpack.c File Reference

WavPack lossless audio decoder. More...

#include "libavutil/channel_layout.h"
#include "avcodec.h"
#include "bytestream.h"
#include "get_bits.h"
#include "internal.h"
#include "thread.h"
#include "unary.h"
#include "wavpack.h"

Go to the source code of this file.

Data Structures
struct	SavedContext
struct	WavpackFrameContext
struct	WavpackContext

Macros
#define	BITSTREAM_READER_LE
#define	WV_MAX_FRAME_DECODERS   14
#define	LEVEL_DECAY(a)   (((a) + 0x80) >> 8)

Functions
static av_always_inline int	get_tail (GetBitContext *gb, int k)
static int	update_error_limit (WavpackFrameContext *ctx)
static int	wv_get_value (WavpackFrameContext *ctx, GetBitContext *gb, int channel, int *last)
static int	wv_get_value_integer (WavpackFrameContext *s, uint32_t *crc, unsigned S)
static float	wv_get_value_float (WavpackFrameContext *s, uint32_t *crc, int S)
static void	wv_reset_saved_context (WavpackFrameContext *s)
static int	wv_check_crc (WavpackFrameContext *s, uint32_t crc, uint32_t crc_extra_bits)
static int	wv_unpack_stereo (WavpackFrameContext *s, GetBitContext *gb, void *dst_l, void *dst_r, const int type)
static int	wv_unpack_mono (WavpackFrameContext *s, GetBitContext *gb, void *dst, const int type)
static av_cold int	wv_alloc_frame_context (WavpackContext *c)
static av_cold int	wavpack_decode_init (AVCodecContext *avctx)
static av_cold int	wavpack_decode_end (AVCodecContext *avctx)
static int	wavpack_decode_block (AVCodecContext *avctx, int block_no, AVFrame *frame, const uint8_t *buf, int buf_size)
static void	wavpack_decode_flush (AVCodecContext *avctx)
static int	wavpack_decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)

Variables
AVCodec	ff_wavpack_decoder

Detailed Description

WavPack lossless audio decoder.

Definition in file wavpack.c.

Macro Definition Documentation

BITSTREAM_READER_LE

#define BITSTREAM_READER_LE

Definition at line 24 of file wavpack.c.

WV_MAX_FRAME_DECODERS

#define WV_MAX_FRAME_DECODERS   14

Definition at line 73 of file wavpack.c.

Referenced by wv_alloc_frame_context().

LEVEL_DECAY

#define LEVEL_DECAY

(

a

)

(((a) + 0x80) >> 8)

Definition at line 86 of file wavpack.c.

Referenced by update_error_limit(), and wv_get_value().

Function Documentation

get_tail()

static av_always_inline int get_tail ( GetBitContext *  gb, int  k  )

static

Definition at line 88 of file wavpack.c.

Referenced by wv_get_value().

update_error_limit()

static int update_error_limit ( WavpackFrameContext *  ctx )

static

Definition at line 102 of file wavpack.c.

Referenced by wv_get_value().

wv_get_value()

static int wv_get_value ( WavpackFrameContext *  ctx, GetBitContext *  gb, int  channel, int *  last  )

static

Definition at line 140 of file wavpack.c.

Referenced by wv_unpack_mono(), and wv_unpack_stereo().

wv_get_value_integer()

static int wv_get_value_integer ( WavpackFrameContext *  s, uint32_t *  crc, unsigned  S  )

inlinestatic

Definition at line 270 of file wavpack.c.

Referenced by wv_unpack_mono(), and wv_unpack_stereo().

wv_get_value_float()

static float wv_get_value_float ( WavpackFrameContext *  s, uint32_t *  crc, int  S  )

static

Definition at line 294 of file wavpack.c.

Referenced by wv_unpack_mono(), and wv_unpack_stereo().

wv_reset_saved_context()

static void wv_reset_saved_context ( WavpackFrameContext *  s )

static

Definition at line 368 of file wavpack.c.

Referenced by wavpack_decode_flush(), wv_alloc_frame_context(), wv_unpack_mono(), and wv_unpack_stereo().

wv_check_crc()

static int wv_check_crc ( WavpackFrameContext *  s, uint32_t  crc, uint32_t  crc_extra_bits  )

inlinestatic

Definition at line 374 of file wavpack.c.

Referenced by wv_unpack_mono(), and wv_unpack_stereo().

wv_unpack_stereo()

static int wv_unpack_stereo ( WavpackFrameContext *  s, GetBitContext *  gb, void *  dst_l, void *  dst_r, const int  type  )

inlinestatic

Definition at line 389 of file wavpack.c.

Referenced by wavpack_decode_block().

wv_unpack_mono()

static int wv_unpack_mono ( WavpackFrameContext *  s, GetBitContext *  gb, void *  dst, const int  type  )

inlinestatic

Definition at line 522 of file wavpack.c.

Referenced by wavpack_decode_block().

wv_alloc_frame_context()

static av_cold int wv_alloc_frame_context ( WavpackContext *  c )

static

Definition at line 591 of file wavpack.c.

Referenced by wavpack_decode_block().

wavpack_decode_init()

static av_cold int wavpack_decode_init ( AVCodecContext *  avctx )

static

Definition at line 615 of file wavpack.c.

wavpack_decode_end()

static av_cold int wavpack_decode_end ( AVCodecContext *  avctx )

static

Definition at line 626 of file wavpack.c.

wavpack_decode_block()

static int wavpack_decode_block ( AVCodecContext *  avctx, int  block_no, AVFrame *  frame, const uint8_t *  buf, int  buf_size  )

static

Definition at line 638 of file wavpack.c.

Referenced by wavpack_decode_frame().

wavpack_decode_flush()

static void wavpack_decode_flush ( AVCodecContext *  avctx )

static

Definition at line 1065 of file wavpack.c.

Referenced by wavpack_decode_frame().

wavpack_decode_frame()

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

static

Definition at line 1074 of file wavpack.c.

Variable Documentation

ff_wavpack_decoder

AVCodec ff_wavpack_decoder

Initial value:

= {
    .name           = "wavpack",
    .long_name      = NULL_IF_CONFIG_SMALL("WavPack"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_WAVPACK,
    .priv_data_size = sizeof(WavpackContext),
    .init           = wavpack_decode_init,
    .close          = wavpack_decode_end,
    .decode         = wavpack_decode_frame,
    .flush          = wavpack_decode_flush,
    .init_thread_copy = ONLY_IF_THREADS_ENABLED(init_thread_copy),
    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
}

Definition at line 1140 of file wavpack.c.