libavcodec/smacker.c File Reference

Smacker decoder. More...

#include <stdio.h>
#include <stdlib.h>
#include "avcodec.h"
#include "libavutil/audioconvert.h"
#include "mathops.h"
#include "get_bits.h"
#include "bytestream.h"

Go to the source code of this file.

Data Structures
struct	SmackVContext
struct	HuffContext
	Context used for code reconstructing. More...
struct	DBCtx
struct	SmackerAudioContext
Defines
#define	BITSTREAM_READER_LE
#define	SMKTREE_BITS   9
#define	SMK_NODE   0x80000000
Enumerations
enum	SmkBlockTypes { SMK_BLK_MONO = 0, SMK_BLK_FULL = 1, SMK_BLK_SKIP = 2, SMK_BLK_FILL = 3 }
Functions
static int	smacker_decode_tree (GetBitContext *gb, HuffContext *hc, uint32_t prefix, int length)
	Decode local frame tree.
static int	smacker_decode_bigtree (GetBitContext *gb, HuffContext *hc, DBCtx *ctx)
	Decode header tree.
static int	smacker_decode_header_tree (SmackVContext *smk, GetBitContext *gb, int **recodes, int *last, int size)
	Store large tree as FFmpeg's vlc codes.
static int	decode_header_trees (SmackVContext *smk)
static av_always_inline void	last_reset (int *recode, int *last)
static av_always_inline int	smk_get_code (GetBitContext *gb, int *recode, int *last)
static int	decode_frame (AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
static av_cold int	decode_init (AVCodecContext *avctx)
static av_cold int	decode_end (AVCodecContext *avctx)
static av_cold int	smka_decode_init (AVCodecContext *avctx)
static int	smka_decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
	Decode Smacker audio data.
Variables
static const int	block_runs [64]
AVCodec	ff_smacker_decoder
AVCodec	ff_smackaud_decoder

---

Detailed Description

Smacker decoder.

Definition in file smacker.c.

---

Define Documentation

#define BITSTREAM_READER_LE

Definition at line 38 of file smacker.c.

#define SMK_NODE   0x80000000

Definition at line 43 of file smacker.c.

Referenced by smacker_decode_bigtree(), and smk_get_code().

#define SMKTREE_BITS   9

Definition at line 42 of file smacker.c.

Referenced by smacker_decode_bigtree(), smacker_decode_header_tree(), and smka_decode_frame().

---

Enumeration Type Documentation

enum SmkBlockTypes

Enumerator:

SMK_BLK_MONO
SMK_BLK_FULL
SMK_BLK_SKIP
SMK_BLK_FILL

Definition at line 88 of file smacker.c.

---

Function Documentation

static av_cold int decode_end

(

AVCodecContext *

avctx

)

[static]

Definition at line 555 of file smacker.c.

static int decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	data_size,
		AVPacket *	avpkt
	)			[static]

Definition at line 365 of file smacker.c.

static int decode_header_trees

(

SmackVContext *

smk

)

[static]

Definition at line 288 of file smacker.c.

Referenced by decode_init().

static av_cold int decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 526 of file smacker.c.

static av_always_inline void last_reset	(	int *	recode,
		int *	last
	)			[static]

Definition at line 339 of file smacker.c.

Referenced by decode_frame().

static int smacker_decode_bigtree	(	GetBitContext *	gb,
		HuffContext *	hc,
		DBCtx *	ctx
	)			[static]

Decode header tree.

Definition at line 129 of file smacker.c.

Referenced by smacker_decode_header_tree().

static int smacker_decode_header_tree	(	SmackVContext *	smk,
		GetBitContext *	gb,
		int **	recodes,
		int *	last,
		int	size
	)			[static]

Store large tree as FFmpeg's vlc codes.

Definition at line 178 of file smacker.c.

Referenced by decode_header_trees().

static int smacker_decode_tree	(	GetBitContext *	gb,
		HuffContext *	hc,
		uint32_t	prefix,
		int	length
	)			[static]

Decode local frame tree.

Definition at line 97 of file smacker.c.

Referenced by smacker_decode_header_tree(), and smka_decode_frame().

static av_always_inline int smk_get_code	(	GetBitContext *	gb,
		int *	recode,
		int *	last
	)			[static]

Definition at line 344 of file smacker.c.

Referenced by decode_frame().

static int smka_decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	got_frame_ptr,
		AVPacket *	avpkt
	)			[static]

Decode Smacker audio data.

Definition at line 595 of file smacker.c.

static av_cold int smka_decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 575 of file smacker.c.

---

Variable Documentation

const int block_runs[64] [static]

Initial value:

 {
      1,    2,    3,    4,    5,    6,    7,    8,
      9,   10,   11,   12,   13,   14,   15,   16,
     17,   18,   19,   20,   21,   22,   23,   24,
     25,   26,   27,   28,   29,   30,   31,   32,
     33,   34,   35,   36,   37,   38,   39,   40,
     41,   42,   43,   44,   45,   46,   47,   48,
     49,   50,   51,   52,   53,   54,   55,   56,
     57,   58,   59,  128,  256,  512, 1024, 2048 }

Definition at line 78 of file smacker.c.

Referenced by decode_frame().

AVCodec ff_smackaud_decoder

Initial value:

 {
    .name           = "smackaud",
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = CODEC_ID_SMACKAUDIO,
    .priv_data_size = sizeof(SmackerAudioContext),
    .init           = smka_decode_init,
    .decode         = smka_decode_frame,
    .capabilities   = CODEC_CAP_DR1,
    .long_name = NULL_IF_CONFIG_SMALL("Smacker audio"),
}

Definition at line 757 of file smacker.c.

AVCodec ff_smacker_decoder

Initial value:

 {
    .name           = "smackvid",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = CODEC_ID_SMACKVIDEO,
    .priv_data_size = sizeof(SmackVContext),
    .init           = decode_init,
    .close          = decode_end,
    .decode         = decode_frame,
    .capabilities   = CODEC_CAP_DR1,
    .long_name = NULL_IF_CONFIG_SMALL("Smacker video"),
}

Definition at line 745 of file smacker.c.