vmdvideo.c File Reference

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/. More...

#include <string.h>
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "internal.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, void *data, int *got_frame, AVPacket *avpkt)

Variables
AVCodec	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

#define VMD_HEADER_SIZE   0x330

Definition at line 45 of file vmdvideo.c.

Referenced by vmdvideo_decode_init().

#define PALETTE_COUNT   256

Definition at line 46 of file vmdvideo.c.

Referenced by vmd_decode(), vmdvideo_decode_frame(), and vmdvideo_decode_init().

#define QUEUE_SIZE   0x1000

Definition at line 63 of file vmdvideo.c.

Referenced by lz_unpack().

#define QUEUE_MASK   0x0FFF

Definition at line 64 of file vmdvideo.c.

Referenced by lz_unpack().

Function Documentation

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

static

Definition at line 66 of file vmdvideo.c.

Referenced by vmd_decode().

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

static

Definition at line 139 of file vmdvideo.c.

Referenced by vmd_decode().

static int vmd_decode ( VmdVideoContext *  s, AVFrame *  frame  )

static

Definition at line 183 of file vmdvideo.c.

Referenced by vmdvideo_decode_frame().

static av_cold int vmdvideo_decode_end ( AVCodecContext *  avctx )

static

Definition at line 367 of file vmdvideo.c.

Referenced by vmdvideo_decode_init().

static av_cold int vmdvideo_decode_init ( AVCodecContext *  avctx )

static

Definition at line 378 of file vmdvideo.c.

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

static

Definition at line 426 of file vmdvideo.c.

Variable Documentation

AVCodec ff_vmdvideo_decoder

Initial value:

= {
    .name           = "vmdvideo",
    .long_name      = NULL_IF_CONFIG_SMALL("Sierra VMD video"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_VMDVIDEO,
    .priv_data_size = sizeof(VmdVideoContext),
    .init           = vmdvideo_decode_init,
    .close          = vmdvideo_decode_end,
    .decode         = vmdvideo_decode_frame,
    .capabilities   = CODEC_CAP_DR1,
}

Definition at line 462 of file vmdvideo.c.