Remove useless video filters

Most of these have very limited actual use, or are even entirely
useless. They only serve to bloat the codebase and to make life harder.
Drowning users in tons of barely useful filters isn't exactly helpful
either. Some of these filters were redundant or marked as obsolete.

The dlopen and lua (to be added soon) video filters provide ways to add
custom filters.

Detailed listing for each filter with reasons (with contributions from
divVerent and lachs0r):

1bpp:
    Replaced by "scale".
2xsai:
    Pixel art scaling algorithm, useless with lossy video.
blackframe:
    Not very useful. Apparently one use is combining it with scripts,
    that pass the
bmovl:
    Weirdly complex and insane (using FIFO commands), questionable use.
cropdetect:
    Only sort-of useful when used with scripts, and then it will be
    very fragile.
    It's probably better to use the dlopen rectangle filter, or to
    implement the common use-case in a better way.
decimate:
    Not needed/useful with modern video codecs, is an
    encoding-only filter.
denoise3d:
    "hqdn3d" is better.
detc:
    Some of the worse deteleciners.
dint:
    Useless, actually crashes. (On an assert in vf.c that is disabled
    by default in mplayer-svn.)
dvbscale:
    Not even practical, and the same effect can be achieved through
    other means.
eq:
    Worse/older version of eq2.
field:
    Limited use, available as dlopen filter.
fil:
    Quoting the manpage:
        This filter is very similar to the il filter but much faster,
        the main disadvantage is that it does not always work.
        Especially if combined with other filters it may produce
        randomly messed up images, so be happy if it works but do not
        complain if it does not for your combination of filters.
filmdint:
    Kind of redundant with pullup, and slightly worse.
fixpts:
    Never useful. (Most if not all filters have been fixed for PTS.)
framestep:
    Questionable use. For things like creating thumbnails, ffmpeg or
    --sstep should be used.
geq:
    Limited use, will be redundant with the "lua" filter.
halfpack:
    Useless, probably redundant with "scale".
harddup:
    Useless.
hue:
    Most VOs support this.
il:
    Useless.
ivtc:
    Another of the worse deteleciners.
kerndeint:
    A bad deinterlacer.
lavc:
    For DVB output devices. We removed that support.
lavcdeint:
    A bad deinterlacer, was already deprecated.
    Still available as --vf=pp=fd.
mcdeint:
    A broken deinterlacer that uses lavc internals.
ow:
    Very slow, barely any quality benefit over "hqdn3d".
palette:
    Done by "scale".
perspective:
    Files with incorrect perspective are extremely rare. About the
    only real-world use for this is keystone correction, which is
    usually done in hardware by the projector or by graphics
    drivers/compositors.
pp7:
    Another useless postprocessing filter with bad and complicated code.
    Use libpostprocess with "pp" instead.
qp:
    Useless.
remove-logo:
    Redundant with delogo, which is better and more practical.
rgbtest:
    Useless.
sab, smartblur, boxblur:
    Blur filters, redundant to "unsharp".
softskip:
    Does nothing.
spp, fspp, uspp:
    Useless postprocessing filters. "spp" needs ffmpeg internals.
    "fspp" is the optimized version of the "spp" filter (???), while
    "uspp" is the slow version (????).
    Use libpostprocess with "pp" instead.
telecine:
    Evil and useless. Available as dlopen filter for testing
    purposes.
test:
    Useless.
tfields:
    Useless, probably.
tile:
    Questionable use. Available as dlopen filter.
tinterlace:
    Evil and useless.
yuvcsp:
    Probably useless.
yvu9:
    Redundant with "scale".

Also remove the following left-over files: vd_null.c, vqf.h

1 files changed, 0 insertions, 228 deletions

diff --git a/libmpcodecs/vqf.h b/libmpcodecs/vqf.h
deleted file mode 100644
index 139b578da7..0000000000
--- a/libmpcodecs/vqf.h
+++ /dev/null
@@ -1,228 +0,0 @@
-/* (c)Copyright 1996-2000 NTT Cyber Space Laboratories */
-/*                Released on 2000.05.22 by N. Iwakami */
-/*                Modified on 2000.05.25 by N. Iwakami */
-/*                Released on 2000.09.06 by N. Iwakami */
-
-// Modified for MPlayer on 2004.12.29
-
-#ifndef MPLAYER_VQF_H
-#define MPLAYER_VQF_H
-
-#include <stdio.h>
-
-#ifdef _MSC_VER
-#	ifdef DLL_MODULE
-#		define DllPort    __declspec( dllexport )
-#	else
-#		define DllPort    __declspec( dllimport )
-#	endif
-#else
-#	define DllPort
-#endif
-
-#ifdef __cplusplus
-extern "C" {  // only need to import/export C interface if used by C++ source code
-#endif
-
-/************************/
-/*** General settings ***/
-/************************/
-/* Initialization error code */
-enum INIT_ERROR_CODE {
-	TVQ_NO_ERROR = 0,     // no error
-	TVQ_ERROR,            // general
-	TVQ_ERROR_VERSION,    // wrong version
-	TVQ_ERROR_CHANNEL,    // channel setting error
-	TVQ_ERROR_MODE,       // wrong coding mode
-	TVQ_ERROR_PARAM,      // inner parameter setting error
-	TVQ_ERROR_N_CAN,      // wrong number of VQ pre-selection candidates, used only in encoder
-};
-
-/* version ID */
-#define TVQ_UNKNOWN_VERSION  -1
-#define V2                    0
-#define V2PP                  1
-
-#define N_VERSIONS            2
-
-/* window types */
-enum WINDOW_TYPE {
-  ONLY_LONG_WINDOW = 0,
-  LONG_SHORT_WINDOW,
-  ONLY_SHORT_WINDOW,
-  SHORT_LONG_WINDOW,
-  SHORT_MEDIUM_WINDOW,
-  MEDIUM_LONG_WINDOW,
-  LONG_MEDIUM_WINDOW,
-  MEDIUM_SHORT_WINDOW,
-  ONLY_MEDIUM_WINDOW,
-};
-
-/* block types */
-enum BLOCK_TYPE {
-	BLK_SHORT = 0,
-	BLK_MEDIUM,
-	BLK_LONG,
-	BLK_PPC,
-};
-#define N_BTYPE     3  // number of block types
-#define N_INTR_TYPE 4  // number of interleave types, enum BLOCK_TYPE is commonly used for detecting interleave types.
-
-/* maximum number of channels */
-#define N_CH_MAX     2
-
-/* type definition of code information interface */
-typedef struct {
-	/* block type */
-    int  w_type;
-    int  btype;
-
-	/* FBC info */
-    int  *segment_sw[ N_CH_MAX ];
-    int  *band_sw[ N_CH_MAX ];
-    int	 *fg_intensity[ N_CH_MAX ];
-
-	/* VQ info */
-    int  *wvq;
-
-	/* BSE info */
-    int  *fw;
-    int  *fw_alf;
-
-	/* gain info */
-    int  *pow;
-
-	/* LSP info */
-    int  *lsp[ N_CH_MAX ];
-
-	/* PPC info */
-    int  pit[ N_CH_MAX ];
-    int  *pls;
-    int  pgain[ N_CH_MAX ];
-
-	/* EBC info */
-    int  *bc[ N_CH_MAX ];
-
-    void *manager;
-} INDEX;
-
-/***********************************************/
-/*** Definitions about program configuration ***/
-/***********************************************/
-/* type definition of tvqConfInfoSubBlock */
-typedef struct {
-	int sf_sz;         // subframe size
-	int nsf;           // number of subframes
-	int ndiv;          // number of division of weighted interleave vector quantization
-	int ncrb;          // number of Bark-scale subbands
-	int fw_ndiv;       // number of division of BSE VQ
-	int fw_nbit;       // number of bits for BSE VQ
-	int nsubg;         // number of sub-blocks for gain coding
-	int ppc_enable;    // PPC switch
-	int ebc_enable;    // EBC switch
-	int ebc_crb_base;  // EBC base band
-	int ebc_bits;      // EBC bits
-	int fbc_enable;    // FBC switch
-	int fbc_n_segment; // FBC number of segments
-	int fbc_nband;     // FBC number of subbands
-	int *fbc_crb_tbl;  // FBC subband table
-} tvqConfInfoSubBlock;
-
-/* type definition of tvqConfInfo */
-typedef struct {
-  /* frame configuration */
-  int N_CH;
-  /* window type coding */
-  int BITS_WTYPE;
-  /* LSP coding */
-  int LSP_BIT0;
-  int LSP_BIT1;
-  int LSP_BIT2;
-  int LSP_SPLIT;
-  /* Bark-scale envelope coding */
-  int FW_ARSW_BITS;
-  /* gain coding */
-  int GAIN_BITS;
-  int SUB_GAIN_BITS;
-  /* pitch excitation */
-  int N_DIV_P;
-  int BASF_BIT;
-  int PGAIN_BIT;
-
-  /* block type dependent parameters */
-  tvqConfInfoSubBlock cfg[N_BTYPE];
-
-} tvqConfInfo;
-
-
-/*************************************************/
-/*** Definitions about TwinVQ bitstream header ***/
-/*************************************************/
-//#include "declib_src/tvq_hdr.h"
-//#ifndef	BUFSIZ
-//#define	BUFSIZ		1024
-//#endif
-
-#define	KEYWORD_BYTES	4
-#define	VERSION_BYTES	8
-#define ELEM_BYTES      sizeof(unsigned long)
-
-
-/*
- */
-typedef struct {
-	char		ID[KEYWORD_BYTES+VERSION_BYTES+1];
-	int size;
-	/* Common Chunk */
-	int channelMode;   /* channel mode (mono:0/stereo:1) */
-	int bitRate;       /* bit rate (kbit/s) */
-	int samplingRate;  /* sampling rate (44.1 kHz -> 44) */
-	int securityLevel; /* security level (always 0) */
-	/* Text Chunk */
-	char	Name[BUFSIZ];
-	char	Comt[BUFSIZ];
-	char	Auth[BUFSIZ];
-	char	Cpyr[BUFSIZ];
-	char	File[BUFSIZ];
-	char	Extr[BUFSIZ];  // add by OKAMOTO 99.12.21
-	/* Data size chunk*/
-	int		Dsiz;
-} headerInfo;
-
-// TwinVQ decoder initialization/termination functions
-//DllPort int  TvqInitialize( headerInfo *setupInfo, INDEX *index, int dispErrorMessageBox );
-//DllPort void TvqTerminate( INDEX *index );
-//DllPort void TvqGetVectorInfo(int *bits0[], int *bits1[]);
-//DllPort void TvqResetFrameCounter(void);
-
-// TwinVQ decoder function
-//DllPort void TvqDecodeFrame(INDEX  *indexp, float out[]);
-//DllPort int  TvqWtypeToBtype( int w_type, int *btype );
-//DllPort void TvqUpdateVectorInfo(int varbits, int *ndiv, int bits0[], int bits1[]);
-//DllPort void TvqSetFrameCounter( int position );
-
-// TwinVQ query functions
-//DllPort int   TvqCheckVersion(char *versionID);
-//DllPort void  TvqGetSetupInfo(headerInfo *setupInfo); // setup information
-//DllPort void  TvqGetConfInfo(tvqConfInfo *cf);  // configuration information
-//DllPort int   TvqGetFrameSize(void);   // frame size
-//DllPort int   TvqGetNumChannels(void); // number of channels
-//DllPort int   TvqGetBitRate(void);                        // total bitrate
-//DllPort float TvqGetSamplingRate(void);                   // sampling rate
-//DllPort int   TvqGetNumFixedBitsPerFrame(void);           // number of fixed bits per frame
-//DllPort int   TvqGetNumFrames(void);   // number of decoded frame
-//DllPort int   TvqGetModuleVersion( char* versionString );
-
-#ifdef V2PLUS_SUPPORT
-// TwinVQ FB coding tool control
-DllPort void  TvqFbCountUsedBits(int nbit);  // count number of used bits
-DllPort float TvqGetFbCurrentBitrate(void);  // query average bitrate for the tool
-DllPort int   TvqGetFbTotalBits(void);  // query total number of used bits
-#endif
-
-#ifdef __cplusplus
-}
-#endif
-
-
-#endif /* MPLAYER_VQF_H */