FFmpeg
Data Structures | Macros | Functions | Variables
escape124.c File Reference
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"

Go to the source code of this file.

Data Structures

union  MacroBlock
 
union  SuperBlock
 
struct  CodeBook
 
struct  Escape124Context
 

Macros

#define BITSTREAM_READER_LE
 

Functions

static av_cold int escape124_decode_init (AVCodecContext *avctx)
 Initialize the decoder. More...
 
static av_cold int escape124_decode_close (AVCodecContext *avctx)
 
static CodeBook unpack_codebook (GetBitContext *gb, unsigned depth, unsigned size)
 
static unsigned decode_skip_count (GetBitContext *gb)
 
static MacroBlock decode_macroblock (Escape124Context *s, GetBitContext *gb, int *codebook_index, int superblock_index)
 
static void insert_mb_into_sb (SuperBlock *sb, MacroBlock mb, unsigned index)
 
static void copy_superblock (uint16_t *dest, unsigned dest_stride, uint16_t *src, unsigned src_stride)
 
static int escape124_decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
 

Variables

static const uint16_t mask_matrix []
 
const AVCodec ff_escape124_decoder
 

Macro Definition Documentation

◆ BITSTREAM_READER_LE

#define BITSTREAM_READER_LE

Definition at line 22 of file escape124.c.

Function Documentation

◆ escape124_decode_init()

static av_cold int escape124_decode_init ( AVCodecContext avctx)
static

Initialize the decoder.

Parameters
avctxdecoder context
Returns
0 success, negative on error

Definition at line 56 of file escape124.c.

◆ escape124_decode_close()

static av_cold int escape124_decode_close ( AVCodecContext avctx)
static

Definition at line 72 of file escape124.c.

◆ unpack_codebook()

static CodeBook unpack_codebook ( GetBitContext gb,
unsigned  depth,
unsigned  size 
)
static

Definition at line 85 of file escape124.c.

Referenced by escape124_decode_frame().

◆ decode_skip_count()

static unsigned decode_skip_count ( GetBitContext gb)
static

Definition at line 117 of file escape124.c.

Referenced by escape124_decode_frame().

◆ decode_macroblock()

static MacroBlock decode_macroblock ( Escape124Context s,
GetBitContext gb,
int codebook_index,
int  superblock_index 
)
static

Definition at line 139 of file escape124.c.

Referenced by escape124_decode_frame().

◆ insert_mb_into_sb()

static void insert_mb_into_sb ( SuperBlock sb,
MacroBlock  mb,
unsigned  index 
)
static

Definition at line 171 of file escape124.c.

Referenced by escape124_decode_frame().

◆ copy_superblock()

static void copy_superblock ( uint16_t *  dest,
unsigned  dest_stride,
uint16_t *  src,
unsigned  src_stride 
)
static

Definition at line 180 of file escape124.c.

Referenced by escape124_decode_frame().

◆ escape124_decode_frame()

static int escape124_decode_frame ( AVCodecContext avctx,
void *  data,
int got_frame,
AVPacket avpkt 
)
static

Definition at line 198 of file escape124.c.

Variable Documentation

◆ mask_matrix

const uint16_t mask_matrix[]
static
Initial value:
= {0x1, 0x2, 0x10, 0x20,
0x4, 0x8, 0x40, 0x80,
0x100, 0x200, 0x1000, 0x2000,
0x400, 0x800, 0x4000, 0x8000}

Definition at line 193 of file escape124.c.

Referenced by escape124_decode_frame().

◆ ff_escape124_decoder

const AVCodec ff_escape124_decoder
Initial value:
= {
.name = "escape124",
.long_name = NULL_IF_CONFIG_SMALL("Escape 124"),
.priv_data_size = sizeof(Escape124Context),
.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
}

Definition at line 379 of file escape124.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
Escape124Context
Definition: escape124.c:43
init
static int init
Definition: av_tx.c:47
decode
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
escape124_decode_frame
static int escape124_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: escape124.c:198
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
escape124_decode_close
static av_cold int escape124_decode_close(AVCodecContext *avctx)
Definition: escape124.c:72
AV_CODEC_ID_ESCAPE124
@ AV_CODEC_ID_ESCAPE124
Definition: codec_id.h:165
escape124_decode_init
static av_cold int escape124_decode_init(AVCodecContext *avctx)
Initialize the decoder.
Definition: escape124.c:56
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201