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//=========================================================
// MusE
// Linux Music Editor
// $Id: node.h,v 1.8.2.2 2006/04/13 19:09:48 spamatica Exp $
//
// (C) Copyright 2001 Werner Schweer (ws@seh.de)
//
// 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; 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
//=========================================================
#ifndef __AUDIONODE_H__
#define __AUDIONODE_H__
#include <list>
#ifndef i386
#include <pthread.h>
typedef struct { pthread_mutex_t lock; int counter; } muse_atomic_t;
#else
typedef struct { int counter; } muse_atomic_t;
#endif
namespace MusECore {
static inline int muse_atomic_read(muse_atomic_t *v) {
#ifndef i386
int ret;
pthread_mutex_lock(&v->lock);
ret = v->counter;
pthread_mutex_unlock(&v->lock);
return ret;
#else
return v->counter;
#endif
}
static inline void muse_atomic_set(muse_atomic_t *v, int i) {
#ifndef i386
pthread_mutex_lock(&v->lock);
v->counter = i;
pthread_mutex_unlock(&v->lock);
#else
v->counter = i;
#endif
}
static inline void muse_atomic_inc(muse_atomic_t *v) {
#ifndef i386
pthread_mutex_lock(&v->lock);
v->counter++;
pthread_mutex_unlock(&v->lock);
#else
__asm__ __volatile__(
"lock ; " "incl %0"
:"=m" (v->counter)
:"m" (v->counter));
#endif
}
static inline void muse_atomic_dec(muse_atomic_t *v) {
#ifndef i386
pthread_mutex_lock(&v->lock);
v->counter--;
pthread_mutex_unlock(&v->lock);
#else
__asm__ __volatile__(
"lock ; " "decl %0"
:"=m" (v->counter)
:"m" (v->counter));
#endif
}
#ifndef i386
static inline void muse_atomic_init(muse_atomic_t *v) {
pthread_mutex_init(&v->lock, NULL);
}
#else
static inline void muse_atomic_init(muse_atomic_t*) {}
#endif
#ifndef i386
static inline void muse_atomic_destroy(muse_atomic_t *v) {
pthread_mutex_destroy(&v->lock);
}
#else
static inline void muse_atomic_destroy(muse_atomic_t*) {}
#endif
class Xml;
class Pipeline;
//---------------------------------------------------------
// Fifo
//---------------------------------------------------------
struct FifoBuffer {
float* buffer;
int size;
int maxSize;
unsigned pos;
int segs;
FifoBuffer() {
buffer = 0;
size = 0;
maxSize = 0;
}
};
class Fifo {
int nbuffer;
int ridx; // read index; only touched by reader
int widx; // write index; only touched by writer
muse_atomic_t count; // buffer count; writer increments, reader decrements
FifoBuffer** buffer;
public:
Fifo();
~Fifo();
void clear() {
ridx = 0;
widx = 0;
muse_atomic_set(&count, 0);
}
bool put(int, unsigned long, float** buffer, unsigned pos);
bool getWriteBuffer(int, unsigned long, float** buffer, unsigned pos);
void add();
bool get(int, unsigned long, float** buffer, unsigned* pos);
void remove();
int getCount();
};
} // namespace MusECore
#endif
|
