FFmpeg
Data Structures | Macros | Functions | Variables
vmdvideo.c File Reference
#include <string.h>
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "decode.h"
#include "bytestream.h"

Go to the source code of this file.

Data Structures

struct  VmdVideoContext
 

Macros

#define VMD_HEADER_SIZE   0x330
 
#define PALETTE_COUNT   256
 
#define QUEUE_SIZE   0x1000
 
#define QUEUE_MASK   0x0FFF
 

Functions

static int lz_unpack (const unsigned char *src, int src_len, unsigned char *dest, int dest_len)
 
static int rle_unpack (const unsigned char *src, unsigned char *dest, int src_count, int src_size, int dest_len)
 
static int vmd_decode (VmdVideoContext *s, AVFrame *frame)
 
static av_cold int vmdvideo_decode_end (AVCodecContext *avctx)
 
static av_cold int vmdvideo_decode_init (AVCodecContext *avctx)
 
static int vmdvideo_decode_frame (AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *avpkt)
 

Variables

const FFCodec ff_vmdvideo_decoder
 

Detailed Description

Sierra VMD video decoder by Vladimir "VAG" Gneushev (vagsoft at mail.ru) for more information on the Sierra VMD format, visit: http://www.pcisys.net/~melanson/codecs/

The video decoder outputs PAL8 colorspace data. The decoder expects a 0x330-byte VMD file header to be transmitted via extradata during codec initialization. Each encoded frame that is sent to this decoder is expected to be prepended with the appropriate 16-byte frame information record from the VMD file.

Definition in file vmdvideo.c.

Macro Definition Documentation

◆ VMD_HEADER_SIZE

#define VMD_HEADER_SIZE   0x330

Definition at line 46 of file vmdvideo.c.

◆ PALETTE_COUNT

#define PALETTE_COUNT   256

Definition at line 47 of file vmdvideo.c.

◆ QUEUE_SIZE

#define QUEUE_SIZE   0x1000

Definition at line 64 of file vmdvideo.c.

◆ QUEUE_MASK

#define QUEUE_MASK   0x0FFF

Definition at line 65 of file vmdvideo.c.

Function Documentation

◆ lz_unpack()

static int lz_unpack ( const unsigned char *  src,
int  src_len,
unsigned char *  dest,
int  dest_len 
)
static

Definition at line 67 of file vmdvideo.c.

Referenced by vmd_decode().

◆ rle_unpack()

static int rle_unpack ( const unsigned char *  src,
unsigned char *  dest,
int  src_count,
int  src_size,
int  dest_len 
)
static

Definition at line 140 of file vmdvideo.c.

Referenced by vmd_decode().

◆ vmd_decode()

static int vmd_decode ( VmdVideoContext s,
AVFrame frame 
)
static

Definition at line 184 of file vmdvideo.c.

Referenced by vmdvideo_decode_frame().

◆ vmdvideo_decode_end()

static av_cold int vmdvideo_decode_end ( AVCodecContext avctx)
static

Definition at line 376 of file vmdvideo.c.

◆ vmdvideo_decode_init()

static av_cold int vmdvideo_decode_init ( AVCodecContext avctx)
static

Definition at line 387 of file vmdvideo.c.

◆ vmdvideo_decode_frame()

static int vmdvideo_decode_frame ( AVCodecContext avctx,
AVFrame frame,
int got_frame,
AVPacket avpkt 
)
static

Definition at line 433 of file vmdvideo.c.

Variable Documentation

◆ ff_vmdvideo_decoder

const FFCodec ff_vmdvideo_decoder
Initial value:
= {
.p.name = "vmdvideo",
CODEC_LONG_NAME("Sierra VMD video"),
.p.type = AVMEDIA_TYPE_VIDEO,
.priv_data_size = sizeof(VmdVideoContext),
.p.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 466 of file vmdvideo.c.

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: codec_internal.h:42
vmdvideo_decode_end
static av_cold int vmdvideo_decode_end(AVCodecContext *avctx)
Definition: vmdvideo.c:376
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:287
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:272
AV_CODEC_ID_VMDVIDEO
@ AV_CODEC_ID_VMDVIDEO
Definition: codec_id.h:104
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts.c:365
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
VmdVideoContext
Definition: vmdvideo.c:49
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
vmdvideo_decode_init
static av_cold int vmdvideo_decode_init(AVCodecContext *avctx)
Definition: vmdvideo.c:387
vmdvideo_decode_frame
static int vmdvideo_decode_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *avpkt)
Definition: vmdvideo.c:433