205 lines
4.8 KiB
C++
205 lines
4.8 KiB
C++
/*
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* shn_reader.h
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* shorten_decoder
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*
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* Created by Alex Lagutin on Sun Jul 07 2002.
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* Copyright (c) 2002 Eckysoft All rights reserved.
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*
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*/
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/* xmms-shn - a shorten (.shn) plugin for XMMS
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* Copyright (C) 2000-2001 Jason Jordan (shnutils@freeshell.org)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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* $Id: shn.h,v 1.6 2001/12/30 05:12:04 jason Exp $
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*/
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#ifndef __SHN_READER_H__
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#define __SHN_READER_H__
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#include <stdio.h>
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#include <pthread.h>
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#include "shorten.h"
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#include "ringbuffer.h"
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/* Derek */
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typedef unsigned int uint;
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/* surely no headers will be this large. right? RIGHT? */
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#define OUT_BUFFER_SIZE 16384
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#define NUM_DEFAULT_BUFFER_BLOCKS 512L
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#define SEEK_HEADER_SIZE 12
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#define SEEK_TRAILER_SIZE 12
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#define SEEK_ENTRY_SIZE 80
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#define MASKTABSIZE 33
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typedef struct _shn_decode_state
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{
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uchar *getbuf;
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uchar *getbufp;
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int nbitget;
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int nbyteget;
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ulong gbuffer;
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char *writebuf;
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char *writefub;
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int nwritebuf;
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} shn_decode_state;
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typedef struct _shn_seek_header
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{
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uchar data[SEEK_HEADER_SIZE];
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ulong version;
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ulong shnFileSize;
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} shn_seek_header;
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typedef struct _shn_seek_trailer
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{
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uchar data[SEEK_TRAILER_SIZE];
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ulong seekTableSize;
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} shn_seek_trailer;
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typedef struct _shn_seek_entry
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{
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uchar data[SEEK_ENTRY_SIZE];
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} shn_seek_entry;
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typedef struct _shn_wave_header
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{
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char *filename,
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m_ss[16];
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uint header_size;
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ushort channels,
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block_align,
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bits_per_sample,
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wave_format;
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ulong samples_per_sec,
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avg_bytes_per_sec,
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rate,
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length,
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data_size,
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total_size,
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chunk_size,
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actual_size;
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ulong problems;
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} shn_wave_header;
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class shn_reader
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{
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private:
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shn_decode_state mDecodeState;
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shn_wave_header mWAVEHeader;
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shn_seek_header mSeekHeader;
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shn_seek_trailer mSeekTrailer;
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shn_seek_entry *mSeekTable;
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int mSeekTo;
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bool mEOF;
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bool mGoing;
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long mSeekTableEntries;
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int mBytesInBuf;
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uchar mBuffer[OUT_BUFFER_SIZE];
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int mBytesInHeader;
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uchar mHeader[OUT_BUFFER_SIZE];
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bool mFatalError;
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FILE *mFP;
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RingBuffer mRing;
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pthread_mutex_t mRingLock;
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pthread_cond_t mRunCond;
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pthread_t mThread;
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ulong masktab[MASKTABSIZE];
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int sizeof_sample[TYPE_EOF];
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public:
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shn_reader();
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~shn_reader();
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int open(const char *fn, bool should_load_seek_table = true);
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int go();
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void exit();
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bool file_info(long *size, int *nch, float *rate, float *time,
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int *samplebits, bool *seekable);
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long read(void *buf, long size);
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float seek(float sec);
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int shn_get_buffer_block_size(int blocks);//derek
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unsigned int shn_get_song_length();//derek
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private:
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void init();
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void Run();
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int get_wave_header();
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int verify_header();
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void init_decode_state();
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void write_and_wait(int block_size);
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/* fixio.cpp */
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void init_sizeof_sample();
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void fwrite_type_init();
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void fwrite_type_quit();
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void fix_bitshift(slong *buffer, int nitem, int bitshift, int ftype);
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void fwrite_type(slong **data,int ftype,int nchan,int nitem);
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/* vario.cpp */
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void var_get_init();
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ulong word_get();
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long uvar_get(int nbin);
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ulong ulong_get();
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long var_get(int nbin);
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void var_get_quit();
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/* seek.cpp */
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void load_seek_table(const char *fn);
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int load_separate_seek_table(const char *fn);
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shn_seek_entry *seek_entry_search(ulong goal, ulong min, ulong max);
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/* array.cpp */
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void *pmalloc(ulong size);
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slong **long2d(ulong n0, ulong n1);
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static void *thread_runner(shn_reader *reader)
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{
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reader->Run();
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return NULL;
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}
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};
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inline ulong uchar_to_ulong_le(uchar *buf)
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/* converts 4 bytes stored in little-endian format to a ulong */
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{
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return (ulong)((buf[3] << 24) + (buf[2] << 16) + (buf[1] << 8) + buf[0]);
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}
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inline slong uchar_to_slong_le(uchar *buf)
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/* converts 4 bytes stored in little-endian format to an slong */
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{
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return (slong)uchar_to_ulong_le(buf);
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}
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inline ushort uchar_to_ushort_le(uchar *buf)
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/* converts 4 bytes stored in little-endian format to a ushort */
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{
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return (ushort)((buf[1] << 8) + buf[0]);
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}
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#endif /*__SHN_READER_H__*/
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