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