FFmpeg
Data Structures | Macros | Enumerations | Functions | Variables
wavpack.c File Reference
#include "libavutil/buffer.h"
#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"
#include "dsd.h"

Go to the source code of this file.

Data Structures

struct  WavpackFrameContext
 
struct  WavpackContext
 
struct  DSDfilters
 

Macros

#define BITSTREAM_READER_LE
 
#define DSD_BYTE_READY(low, high)   (!(((low) ^ (high)) & 0xff000000))
 
#define PTABLE_BITS   8
 
#define PTABLE_BINS   (1<<PTABLE_BITS)
 
#define PTABLE_MASK   (PTABLE_BINS-1)
 
#define UP   0x010000fe
 
#define DOWN   0x00010000
 
#define DECAY   8
 
#define PRECISION   20
 
#define VALUE_ONE   (1 << PRECISION)
 
#define PRECISION_USE   12
 
#define RATE_S   20
 
#define MAX_HISTORY_BITS   5
 
#define MAX_HISTORY_BINS   (1 << MAX_HISTORY_BITS)
 
#define MAX_BIN_BYTES   1280
 
#define WV_MAX_FRAME_DECODERS   14
 
#define LEVEL_DECAY(a)   (((a) + 0x80) >> 8)
 

Enumerations

enum  Modulation { MODULATION_PCM, MODULATION_DSD }
 

Functions

static av_always_inline unsigned 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 int wv_check_crc (WavpackFrameContext *s, uint32_t crc, uint32_t crc_extra_bits)
 
static void init_ptable (int *table, int rate_i, int rate_s)
 
static int wv_unpack_dsd_high (WavpackFrameContext *s, uint8_t *dst_left, uint8_t *dst_right)
 
static int wv_unpack_dsd_fast (WavpackFrameContext *s, uint8_t *dst_left, uint8_t *dst_right)
 
static int wv_unpack_dsd_copy (WavpackFrameContext *s, uint8_t *dst_left, uint8_t *dst_right)
 
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 int wv_dsd_reset (WavpackContext *s, int channels)
 
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, const uint8_t *buf, int buf_size)
 
static void wavpack_decode_flush (AVCodecContext *avctx)
 
static int dsd_channel (AVCodecContext *avctx, void *frmptr, int jobnr, int threadnr)
 
static int wavpack_decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
 

Variables

const 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 26 of file wavpack.c.

◆ DSD_BYTE_READY

#define DSD_BYTE_READY (   low,
  high 
)    (!(((low) ^ (high)) & 0xff000000))

Definition at line 41 of file wavpack.c.

◆ PTABLE_BITS

#define PTABLE_BITS   8

Definition at line 43 of file wavpack.c.

◆ PTABLE_BINS

#define PTABLE_BINS   (1<<PTABLE_BITS)

Definition at line 44 of file wavpack.c.

◆ PTABLE_MASK

#define PTABLE_MASK   (PTABLE_BINS-1)

Definition at line 45 of file wavpack.c.

◆ UP

#define UP   0x010000fe

Definition at line 47 of file wavpack.c.

◆ DOWN

#define DOWN   0x00010000

Definition at line 48 of file wavpack.c.

◆ DECAY

#define DECAY   8

Definition at line 49 of file wavpack.c.

◆ PRECISION

#define PRECISION   20

Definition at line 51 of file wavpack.c.

◆ VALUE_ONE

#define VALUE_ONE   (1 << PRECISION)

Definition at line 52 of file wavpack.c.

◆ PRECISION_USE

#define PRECISION_USE   12

Definition at line 53 of file wavpack.c.

◆ RATE_S

#define RATE_S   20

Definition at line 55 of file wavpack.c.

◆ MAX_HISTORY_BITS

#define MAX_HISTORY_BITS   5

Definition at line 57 of file wavpack.c.

◆ MAX_HISTORY_BINS

#define MAX_HISTORY_BINS   (1 << MAX_HISTORY_BITS)

Definition at line 58 of file wavpack.c.

◆ MAX_BIN_BYTES

#define MAX_BIN_BYTES   1280

Definition at line 59 of file wavpack.c.

◆ WV_MAX_FRAME_DECODERS

#define WV_MAX_FRAME_DECODERS   14

Definition at line 98 of file wavpack.c.

◆ LEVEL_DECAY

#define LEVEL_DECAY (   a)    (((a) + 0x80) >> 8)

Definition at line 119 of file wavpack.c.

Enumeration Type Documentation

◆ Modulation

enum Modulation
Enumerator
MODULATION_PCM 
MODULATION_DSD 

Definition at line 61 of file wavpack.c.

Function Documentation

◆ get_tail()

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

Definition at line 121 of file wavpack.c.

Referenced by wv_get_value().

◆ update_error_limit()

static int update_error_limit ( WavpackFrameContext *  ctx)
static

Definition at line 135 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 173 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 303 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 327 of file wavpack.c.

Referenced by 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 401 of file wavpack.c.

Referenced by wv_unpack_dsd_copy(), wv_unpack_dsd_fast(), wv_unpack_dsd_high(), wv_unpack_mono(), and wv_unpack_stereo().

◆ init_ptable()

static void init_ptable ( int *  table,
int  rate_i,
int  rate_s 
)
static

Definition at line 416 of file wavpack.c.

Referenced by wv_unpack_dsd_high().

◆ wv_unpack_dsd_high()

static int wv_unpack_dsd_high ( WavpackFrameContext *  s,
uint8_t *  dst_left,
uint8_t *  dst_right 
)
static

Definition at line 441 of file wavpack.c.

Referenced by wavpack_decode_block().

◆ wv_unpack_dsd_fast()

static int wv_unpack_dsd_fast ( WavpackFrameContext *  s,
uint8_t *  dst_left,
uint8_t *  dst_right 
)
static

Definition at line 580 of file wavpack.c.

Referenced by wavpack_decode_block().

◆ wv_unpack_dsd_copy()

static int wv_unpack_dsd_copy ( WavpackFrameContext *  s,
uint8_t *  dst_left,
uint8_t *  dst_right 
)
static

Definition at line 741 of file wavpack.c.

Referenced by wavpack_decode_block().

◆ 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 773 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 904 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 971 of file wavpack.c.

Referenced by wavpack_decode_block().

◆ wv_dsd_reset()

static int wv_dsd_reset ( WavpackContext *  s,
int  channels 
)
static

Definition at line 985 of file wavpack.c.

Referenced by wavpack_decode_block(), and wavpack_decode_flush().

◆ wavpack_decode_init()

static av_cold int wavpack_decode_init ( AVCodecContext *  avctx)
static

Definition at line 1041 of file wavpack.c.

◆ wavpack_decode_end()

static av_cold int wavpack_decode_end ( AVCodecContext *  avctx)
static

Definition at line 1060 of file wavpack.c.

◆ wavpack_decode_block()

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

Definition at line 1079 of file wavpack.c.

Referenced by wavpack_decode_frame().

◆ wavpack_decode_flush()

static void wavpack_decode_flush ( AVCodecContext *  avctx)
static

Definition at line 1608 of file wavpack.c.

◆ dsd_channel()

static int dsd_channel ( AVCodecContext *  avctx,
void *  frmptr,
int  jobnr,
int  threadnr 
)
static

Definition at line 1615 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 1627 of file wavpack.c.

Variable Documentation

◆ ff_wavpack_decoder

const 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,
.update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context),
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_CHANNEL_CONF,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP |
FF_CODEC_CAP_ALLOCATE_PROGRESS,
}

Definition at line 1702 of file wavpack.c.

FF_CODEC_CAP_INIT_THREADSAFE
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:42
wavpack_decode_flush
static void wavpack_decode_flush(AVCodecContext *avctx)
Definition: wavpack.c:1608
init
static int init
Definition: av_tx.c:47
WavpackContext
Definition: wavpack.c:100
decode
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_CODEC_CAP_FRAME_THREADS
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:113
flush
static void flush(AVCodecContext *avctx)
Definition: aacdec_template.c:593
ONLY_IF_THREADS_ENABLED
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:156
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
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
wavpack_decode_frame
static int wavpack_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
Definition: wavpack.c:1627
AV_CODEC_CAP_SLICE_THREADS
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: codec.h:117
wavpack_decode_end
static av_cold int wavpack_decode_end(AVCodecContext *avctx)
Definition: wavpack.c:1060
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: internal.h:50
update_thread_context
the pkt_dts and pkt_pts fields in AVFrame will work as usual Restrictions on codec whose streams don t reset across will not work because their bitstreams cannot be decoded in parallel *The contents of buffers must not be read before as well as code calling up to before the decode process starts Call have update_thread_context() run it in the next thread. Add AV_CODEC_CAP_FRAME_THREADS to the codec capabilities. There will be very little speed gain at this point but it should work. If there are inter-frame dependencies
wavpack_decode_init
static av_cold int wavpack_decode_init(AVCodecContext *avctx)
Definition: wavpack.c:1041
FF_CODEC_CAP_ALLOCATE_PROGRESS
#define FF_CODEC_CAP_ALLOCATE_PROGRESS
Definition: internal.h:77
AV_CODEC_ID_WAVPACK
@ AV_CODEC_ID_WAVPACK
Definition: codec_id.h:448
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