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 "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "bytestream.h"
#include "get_bits.h"
#include "hpeldsp.h"
#include "internal.h"

Data Structures
struct	IpvideoContext

Macros
#define	BITSTREAM_READER_LE

#define	PALETTE_COUNT 256

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

static int	ipvideo_decode_block_opcode_0x0 (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0x1 (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0x2 (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0x3 (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0x4 (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0x5 (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0x6 (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0x7 (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0x8 (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0x9 (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0xA (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0xB (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0xC (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0xD (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0xE (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0xF (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0x6_16 (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0x7_16 (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0x8_16 (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0x9_16 (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0xA_16 (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0xB_16 (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0xC_16 (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0xD_16 (IpvideoContext s, AVFrame frame)

static int	ipvideo_decode_block_opcode_0xE_16 (IpvideoContext s, AVFrame frame)

static void	ipvideo_format_06_firstpass (IpvideoContext s, AVFrame frame, int16_t opcode)

static void	ipvideo_format_06_secondpass (IpvideoContext s, AVFrame frame, int16_t opcode)

static void	ipvideo_decode_format_06_opcodes (IpvideoContext s, AVFrame frame)

static void	ipvideo_format_10_firstpass (IpvideoContext s, AVFrame frame, int16_t opcode)

static void	ipvideo_format_10_secondpass (IpvideoContext s, AVFrame frame, int16_t opcode)

static void	ipvideo_decode_format_10_opcodes (IpvideoContext s, AVFrame frame)

static void	ipvideo_decode_format_11_opcodes (IpvideoContext s, AVFrame frame)

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, AVFrame frame)

static int(*const	ipvideo_decode_block16 [])(IpvideoContext s, AVFrame frame)

static void(*const	ipvideo_format_06_passes [])(IpvideoContext s, AVFrame frame, int16_t op)

static void(*const	ipvideo_format_10_passes [])(IpvideoContext s, AVFrame frame, int16_t op)

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

◆ BITSTREAM_READER_LE

#define BITSTREAM_READER_LE

Definition at line 43 of file interplayvideo.c.

◆ PALETTE_COUNT

#define PALETTE_COUNT 256

Definition at line 50 of file interplayvideo.c.

Function Documentation

◆ copy_from()

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

static

Definition at line 78 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(), ipvideo_decode_block_opcode_0x6_16(), ipvideo_decode_format_10_opcodes(), ipvideo_format_06_firstpass(), ipvideo_format_06_secondpass(), and ipvideo_format_10_secondpass().

◆ ipvideo_decode_block_opcode_0x0()

static int ipvideo_decode_block_opcode_0x0	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 100 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0x1()

static int ipvideo_decode_block_opcode_0x1	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 105 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0x2()

static int ipvideo_decode_block_opcode_0x2	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 110 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0x3()

static int ipvideo_decode_block_opcode_0x3	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 134 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0x4()

static int ipvideo_decode_block_opcode_0x4	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 160 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0x5()

static int ipvideo_decode_block_opcode_0x5	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 181 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0x6()

static int ipvideo_decode_block_opcode_0x6	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 194 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0x7()

static int ipvideo_decode_block_opcode_0x7	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 203 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0x8()

static int ipvideo_decode_block_opcode_0x8	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 247 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0x9()

static int ipvideo_decode_block_opcode_0x9	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 325 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0xA()

static int ipvideo_decode_block_opcode_0xA	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 395 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0xB()

static int ipvideo_decode_block_opcode_0xB	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 461 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0xC()

static int ipvideo_decode_block_opcode_0xC	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 475 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0xD()

static int ipvideo_decode_block_opcode_0xD	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 494 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0xE()

static int ipvideo_decode_block_opcode_0xE	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 519 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0xF()

static int ipvideo_decode_block_opcode_0xF	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 536 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0x6_16()

static int ipvideo_decode_block_opcode_0x6_16	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 557 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0x7_16()

static int ipvideo_decode_block_opcode_0x7_16	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 569 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0x8_16()

static int ipvideo_decode_block_opcode_0x8_16	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 606 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0x9_16()

static int ipvideo_decode_block_opcode_0x9_16	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 682 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0xA_16()

static int ipvideo_decode_block_opcode_0xA_16	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 749 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0xB_16()

static int ipvideo_decode_block_opcode_0xB_16	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 815 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0xC_16()

static int ipvideo_decode_block_opcode_0xC_16	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 831 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0xD_16()

static int ipvideo_decode_block_opcode_0xD_16	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 851 of file interplayvideo.c.

◆ ipvideo_decode_block_opcode_0xE_16()

static int ipvideo_decode_block_opcode_0xE_16	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 872 of file interplayvideo.c.

◆ ipvideo_format_06_firstpass()

static void ipvideo_format_06_firstpass	(	IpvideoContext *	s,
		AVFrame *	frame,
		int16_t	opcode
	)

static

Definition at line 913 of file interplayvideo.c.

◆ ipvideo_format_06_secondpass()

static void ipvideo_format_06_secondpass	(	IpvideoContext *	s,
		AVFrame *	frame,
		int16_t	opcode
	)

static

Definition at line 929 of file interplayvideo.c.

◆ ipvideo_decode_format_06_opcodes()

static void ipvideo_decode_format_06_opcodes	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 948 of file interplayvideo.c.

Referenced by ipvideo_decode_frame().

◆ ipvideo_format_10_firstpass()

static void ipvideo_format_10_firstpass	(	IpvideoContext *	s,
		AVFrame *	frame,
		int16_t	opcode
	)

static

Definition at line 987 of file interplayvideo.c.

◆ ipvideo_format_10_secondpass()

static void ipvideo_format_10_secondpass	(	IpvideoContext *	s,
		AVFrame *	frame,
		int16_t	opcode
	)

static

Definition at line 999 of file interplayvideo.c.

◆ ipvideo_decode_format_10_opcodes()

static void ipvideo_decode_format_10_opcodes	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 1018 of file interplayvideo.c.

Referenced by ipvideo_decode_frame().

◆ ipvideo_decode_format_11_opcodes()

static void ipvideo_decode_format_11_opcodes	(	IpvideoContext *	s,
		AVFrame *	frame
	)

static

Definition at line 1099 of file interplayvideo.c.

Referenced by ipvideo_decode_frame().

◆ ipvideo_decode_init()

static av_cold int ipvideo_decode_init ( AVCodecContext * avctx )

static

Definition at line 1155 of file interplayvideo.c.

◆ ipvideo_decode_frame()

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

static

Definition at line 1201 of file interplayvideo.c.

◆ ipvideo_decode_end()

static av_cold int ipvideo_decode_end ( AVCodecContext * avctx )

static

Definition at line 1365 of file interplayvideo.c.

Variable Documentation

◆ ipvideo_decode_block

int(* const ipvideo_decode_block[])(IpvideoContext *s, AVFrame *frame)

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 891 of file interplayvideo.c.

Referenced by ipvideo_decode_format_11_opcodes().

◆ ipvideo_decode_block16

int(* const ipvideo_decode_block16[])(IpvideoContext *s, AVFrame *frame)

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 902 of file interplayvideo.c.

Referenced by ipvideo_decode_format_11_opcodes().

◆ ipvideo_format_06_passes

void(* const ipvideo_format_06_passes[])(IpvideoContext *s, AVFrame *frame, int16_t op)

static

Initial value:

= {
    ipvideo_format_06_firstpass, ipvideo_format_06_secondpass,
}

Definition at line 944 of file interplayvideo.c.

Referenced by ipvideo_decode_format_06_opcodes().

◆ ipvideo_format_10_passes

void(* const ipvideo_format_10_passes[])(IpvideoContext *s, AVFrame *frame, int16_t op)

static

Initial value:

= {
    ipvideo_format_10_firstpass, ipvideo_format_10_secondpass,
}

Definition at line 1014 of file interplayvideo.c.

Referenced by ipvideo_decode_format_10_opcodes().

◆ ff_interplay_video_decoder

AVCodec ff_interplay_video_decoder

Initial value:

= {
    .name           = "interplayvideo",
    .long_name      = NULL_IF_CONFIG_SMALL("Interplay MVE video"),
    .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   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_PARAM_CHANGE,
}

Definition at line 1377 of file interplayvideo.c.

Data Structures

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ BITSTREAM_READER_LE

◆ PALETTE_COUNT

Function Documentation

◆ copy_from()

◆ 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()

◆ 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_format_06_firstpass()

◆ ipvideo_format_06_secondpass()

◆ ipvideo_decode_format_06_opcodes()

◆ ipvideo_format_10_firstpass()

◆ ipvideo_format_10_secondpass()

◆ ipvideo_decode_format_10_opcodes()

◆ ipvideo_decode_format_11_opcodes()

◆ ipvideo_decode_init()

◆ ipvideo_decode_frame()

◆ ipvideo_decode_end()

Variable Documentation

◆ ipvideo_decode_block

◆ ipvideo_decode_block16

◆ ipvideo_format_06_passes

◆ ipvideo_format_10_passes

◆ ff_interplay_video_decoder