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 "libavutil/mem.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 47 of file vmdvideo.c.

Referenced by vmd_probe(), vmd_read_header(), and vmdvideo_decode_init().

PALETTE_COUNT

#define PALETTE_COUNT   256

Definition at line 48 of file vmdvideo.c.

QUEUE_SIZE

#define QUEUE_SIZE   0x1000

Definition at line 65 of file vmdvideo.c.

Referenced by lz_unpack().

QUEUE_MASK

#define QUEUE_MASK   0x0FFF

Definition at line 66 of file vmdvideo.c.

Referenced by lz_unpack().

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 68 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 141 of file vmdvideo.c.

Referenced by vmd_decode().

vmd_decode()

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

static

Definition at line 185 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 377 of file vmdvideo.c.

vmdvideo_decode_init()

static av_cold int vmdvideo_decode_init ( AVCodecContext * avctx )

static

Definition at line 388 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 434 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,
    .p.id           = AV_CODEC_ID_VMDVIDEO,
    .priv_data_size = sizeof(VmdVideoContext),
    .init           = vmdvideo_decode_init,
    .close          = vmdvideo_decode_end,
    FF_CODEC_DECODE_CB(vmdvideo_decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1,
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 467 of file vmdvideo.c.