99 lines
3.2 KiB
C
99 lines
3.2 KiB
C
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/*
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** dec_if.h - common decoder interface for nsvplay/nsvplayx
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**
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** Copyright (C) 2001-2003 Nullsoft, Inc.
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**
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** This software is provided 'as-is', without any express or implied warranty.
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** In no event will the authors be held liable for any damages arising from the use of this software.
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**
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** Permission is granted to anyone to use this software for any purpose, including commercial
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** applications, and to alter it and redistribute it freely, subject to the following restrictions:
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** 1. The origin of this software must not be misrepresented; you must not claim that you wrote the
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** original software. If you use this software in a product, an acknowledgment in the product
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** documentation would be appreciated but is not required.
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** 2. Altered source versions must be plainly marked as such, and must not be misrepresented as
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** being the original software.
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** 3. This notice may not be removed or altered from any source distribution.
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**
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*/
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#ifndef _NSV_DEC_IF_H_
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#define _NSV_DEC_IF_H_
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#ifndef _WA_IPC_H_ // these are also defined in Winamp/wa_ipc.h
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struct YV12_PLANE {
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unsigned char* baseAddr;
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long rowBytes;
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} ;
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struct YV12_PLANES {
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YV12_PLANE y;
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YV12_PLANE u;
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YV12_PLANE v;
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} ;
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#endif
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class IVideoDecoder
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{
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public:
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virtual ~IVideoDecoder() { }
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// decode returns 0 on success
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// but *out can be NULL, meaning no new frame is available,
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// but all is well
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virtual int decode(int need_kf,
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void *in, int in_len,
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void **out, // out is set to a pointer to data
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unsigned int *out_type, // 'Y','V','1','2' is currently defined
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int *is_kf)=0;
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virtual void flush()=0;
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};
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class IAudioDecoder
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{
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public:
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virtual ~IAudioDecoder() { }
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// returns -1 on error, 0 on success (done with data in 'in'), 1 on success
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// but to pass 'in' again next time around.
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virtual int decode(void *in, int in_len,
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void *out, int *out_len, // out_len is read and written to
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unsigned int out_fmt[8])=0; // out_fmt is written to
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// ex: 'PCM ', srate, nch, bps
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// or 'NONE' :)
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virtual void flush()=0;
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};
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class IAudioOutput
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{
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public:
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virtual ~IAudioOutput() { }
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virtual int canwrite()=0; // returns bytes writeable
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virtual void write(void *buf, int len)=0;
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virtual unsigned long long getpos()=0;
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virtual unsigned long long getwritepos()=0;
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virtual void flush(unsigned int newtime)=0;
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virtual int isplaying(void) { return 1; }
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virtual void pause(int pause) { }
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virtual void setvolume(int volume) { }
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virtual void setpan(int pan) { }
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virtual void getdescstr(char *buf) { *buf=0; }
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};
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/*
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** The DLL must export one of these symbols (unmangled, i.e. using extern "C).
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**
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** IAudioDecoder *CreateAudioDecoder(unsigned int type, IAudioOutput **output);
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** IVideoDecoder *CreateVideoDecoder(int w, int h, double framerate, unsigned int type, int *flip);
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**
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** the functions should return NULL if the conversion is not possible (or
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** is not the correct format)
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**
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** The DLL must be in <program files>\common files\nsv, and must be named
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** nsvdec_*.dll.
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**
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*/
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#endif//_NSV_DEC_IF_H_
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