interplayvideo.c File Reference

Interplay MVE Video Decoder by Mike Melanson (melan.nosp@m.son@.nosp@m.pcisy.nosp@m.s.ne.nosp@m.t) For more information about the Interplay MVE format, visit: http://www.pcisys.net/~melanson/codecs/interplay-mve.txt This code is written in such a way that the identifiers match up with the encoding descriptions in the document. More...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "avcodec.h"
#include "bytestream.h"
#include "dsputil.h"
#include "get_bits.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	IpvideoContext

Macros
#define	BITSTREAM_READER_LE
#define	PALETTE_COUNT   256

Functions
static int	copy_from (IpvideoContext *s, AVFrame *src, int delta_x, int delta_y)
static int	ipvideo_decode_block_opcode_0x0 (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0x1 (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0x2 (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0x3 (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0x4 (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0x5 (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0x6 (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0x7 (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0x8 (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0x9 (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0xA (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0xB (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0xC (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0xD (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0xE (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0xF (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0x6_16 (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0x7_16 (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0x8_16 (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0x9_16 (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0xA_16 (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0xB_16 (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0xC_16 (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0xD_16 (IpvideoContext *s)
static int	ipvideo_decode_block_opcode_0xE_16 (IpvideoContext *s)
static void	ipvideo_decode_opcodes (IpvideoContext *s)
static av_cold int	ipvideo_decode_init (AVCodecContext *avctx)
static int	ipvideo_decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static av_cold int	ipvideo_decode_end (AVCodecContext *avctx)

Variables
static int(*const	ipvideo_decode_block [])(IpvideoContext *s)
static int(*const	ipvideo_decode_block16 [])(IpvideoContext *s)
AVCodec	ff_interplay_video_decoder

Detailed Description

Interplay MVE Video Decoder by Mike Melanson (melan.nosp@m.son@.nosp@m.pcisy.nosp@m.s.ne.nosp@m.t) For more information about the Interplay MVE format, visit: http://www.pcisys.net/~melanson/codecs/interplay-mve.txt This code is written in such a way that the identifiers match up with the encoding descriptions in the document.

This decoder presently only supports a PAL8 output colorspace.

An Interplay video frame consists of 2 parts: The decoding map and the video data. A demuxer must load these 2 parts together in a single buffer before sending it through the stream to this decoder.

Definition in file interplayvideo.c.

Macro Definition Documentation

#define BITSTREAM_READER_LE

Definition at line 44 of file interplayvideo.c.

#define PALETTE_COUNT   256

Definition at line 48 of file interplayvideo.c.

Function Documentation

static int copy_from ( IpvideoContext *  s, AVFrame *  src, int  delta_x, int  delta_y  )

static

Definition at line 70 of file interplayvideo.c.

Referenced by decode_frame(), ipvideo_decode_block_opcode_0x0(), ipvideo_decode_block_opcode_0x1(), ipvideo_decode_block_opcode_0x2(), ipvideo_decode_block_opcode_0x3(), ipvideo_decode_block_opcode_0x4(), ipvideo_decode_block_opcode_0x5(), and ipvideo_decode_block_opcode_0x6_16().

static int ipvideo_decode_block_opcode_0x0 ( IpvideoContext *  s )

static

Definition at line 92 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0x1 ( IpvideoContext *  s )

static

Definition at line 97 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0x2 ( IpvideoContext *  s )

static

Definition at line 102 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0x3 ( IpvideoContext *  s )

static

Definition at line 126 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0x4 ( IpvideoContext *  s )

static

Definition at line 152 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0x5 ( IpvideoContext *  s )

static

Definition at line 173 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0x6 ( IpvideoContext *  s )

static

Definition at line 186 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0x7 ( IpvideoContext *  s )

static

Definition at line 195 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0x8 ( IpvideoContext *  s )

static

Definition at line 234 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0x9 ( IpvideoContext *  s )

static

Definition at line 307 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0xA ( IpvideoContext *  s )

static

Definition at line 372 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0xB ( IpvideoContext *  s )

static

Definition at line 433 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0xC ( IpvideoContext *  s )

static

Definition at line 447 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0xD ( IpvideoContext *  s )

static

Definition at line 466 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0xE ( IpvideoContext *  s )

static

Definition at line 486 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0xF ( IpvideoContext *  s )

static

Definition at line 503 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0x6_16 ( IpvideoContext *  s )

static

Definition at line 524 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0x7_16 ( IpvideoContext *  s )

static

Definition at line 536 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0x8_16 ( IpvideoContext *  s )

static

Definition at line 573 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0x9_16 ( IpvideoContext *  s )

static

Definition at line 649 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0xA_16 ( IpvideoContext *  s )

static

Definition at line 716 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0xB_16 ( IpvideoContext *  s )

static

Definition at line 782 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0xC_16 ( IpvideoContext *  s )

static

Definition at line 798 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0xD_16 ( IpvideoContext *  s )

static

Definition at line 818 of file interplayvideo.c.

static int ipvideo_decode_block_opcode_0xE_16 ( IpvideoContext *  s )

static

Definition at line 839 of file interplayvideo.c.

static void ipvideo_decode_opcodes ( IpvideoContext *  s )

static

Definition at line 880 of file interplayvideo.c.

Referenced by ipvideo_decode_frame().

static av_cold int ipvideo_decode_init ( AVCodecContext *  avctx )

static

Definition at line 938 of file interplayvideo.c.

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

static

Definition at line 959 of file interplayvideo.c.

static av_cold int ipvideo_decode_end ( AVCodecContext *  avctx )

static

Definition at line 1009 of file interplayvideo.c.

Variable Documentation

int(* const ipvideo_decode_block[])(IpvideoContext *s)

static

Initial value:

= {
    ipvideo_decode_block_opcode_0x0, ipvideo_decode_block_opcode_0x1,
    ipvideo_decode_block_opcode_0x2, ipvideo_decode_block_opcode_0x3,
    ipvideo_decode_block_opcode_0x4, ipvideo_decode_block_opcode_0x5,
    ipvideo_decode_block_opcode_0x6, ipvideo_decode_block_opcode_0x7,
    ipvideo_decode_block_opcode_0x8, ipvideo_decode_block_opcode_0x9,
    ipvideo_decode_block_opcode_0xA, ipvideo_decode_block_opcode_0xB,
    ipvideo_decode_block_opcode_0xC, ipvideo_decode_block_opcode_0xD,
    ipvideo_decode_block_opcode_0xE, ipvideo_decode_block_opcode_0xF,
}

Definition at line 858 of file interplayvideo.c.

Referenced by ipvideo_decode_opcodes().

int(* const ipvideo_decode_block16[])(IpvideoContext *s)

static

Initial value:

= {
    ipvideo_decode_block_opcode_0x0,    ipvideo_decode_block_opcode_0x1,
    ipvideo_decode_block_opcode_0x2,    ipvideo_decode_block_opcode_0x3,
    ipvideo_decode_block_opcode_0x4,    ipvideo_decode_block_opcode_0x5,
    ipvideo_decode_block_opcode_0x6_16, ipvideo_decode_block_opcode_0x7_16,
    ipvideo_decode_block_opcode_0x8_16, ipvideo_decode_block_opcode_0x9_16,
    ipvideo_decode_block_opcode_0xA_16, ipvideo_decode_block_opcode_0xB_16,
    ipvideo_decode_block_opcode_0xC_16, ipvideo_decode_block_opcode_0xD_16,
    ipvideo_decode_block_opcode_0xE_16, ipvideo_decode_block_opcode_0x1,
}

Definition at line 869 of file interplayvideo.c.

Referenced by ipvideo_decode_opcodes().

AVCodec ff_interplay_video_decoder

Initial value:

= {
    .name           = "interplayvideo",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_INTERPLAY_VIDEO,
    .priv_data_size = sizeof(IpvideoContext),
    .init           = ipvideo_decode_init,
    .close          = ipvideo_decode_end,
    .decode         = ipvideo_decode_frame,
    .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_PARAM_CHANGE,
    .long_name      = NULL_IF_CONFIG_SMALL("Interplay MVE video"),
}

Definition at line 1022 of file interplayvideo.c.