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/* $Id: Fifo.h,v 1.16 2004/04/27 22:02:59 titer Exp $
This file is part of the HandBrake source code.
Homepage: <http://handbrake.m0k.org/>.
It may be used under the terms of the GNU General Public License. */
#ifndef HB_FIFO_H
#define HB_FIFO_H
#include "Utils.h"
#include "Thread.h"
struct HBBuffer
{
/* Members used everywhere */
int alloc;
int size;
uint8_t * data;
#if defined( HB_CYGWIN )
uint8_t * dataOrig;
#endif
float * dataf;
float position;
int pass;
/* Only used for PStoES */
uint32_t streamId;
uint64_t pts;
/* NTSC suxx */
int repeat;
/* Only used for MPEG-4, MP3 and AAC buffers */
int keyFrame;
/* Use for bitstreams */
int _pos;
};
HBBuffer * HBBufferInit( int size );
void HBBufferReAlloc( HBBuffer *, int size );
void HBBufferClose( HBBuffer ** );
struct HBFifo
{
int die;
int capacity;
int whereToPush;
int whereToPop;
HBBuffer ** buffers;
HBLock * lock;
HBCond * cond;
};
HBFifo * HBFifoInit( int capacity );
static inline int HBFifoSize( HBFifo * );
static inline int HBFifoIsHalfFull( HBFifo * );
static inline int HBFifoPush( HBFifo *, HBBuffer ** );
static inline HBBuffer * HBFifoPop( HBFifo * );
static inline int HBFifoWait( HBFifo * );
static inline float HBFifoPosition( HBFifo * );
static inline int HBFifoGetBytes( HBFifo * f, uint8_t *, int,
float * position );
void HBFifoDie( HBFifo * );
void HBFifoClose( HBFifo ** );
static inline int HBFifoSize( HBFifo * f )
{
int size;
HBLockLock( f->lock );
size = ( f->capacity + 1 + f->whereToPush - f->whereToPop ) %
( f->capacity + 1 );
HBLockUnlock( f->lock );
return size;
}
static inline int HBFifoIsHalfFull( HBFifo * f )
{
int size;
HBLockLock( f->lock );
size = ( f->capacity + 1 + f->whereToPush - f->whereToPop ) %
( f->capacity + 1 );
HBLockUnlock( f->lock );
return ( 2 * size > f->capacity );
}
static inline int HBFifoPush( HBFifo * f, HBBuffer ** b )
{
HBLockLock( f->lock );
HBCondSignal( f->cond );
if( ( f->capacity + 1 + f->whereToPush - f->whereToPop ) %
( f->capacity + 1 ) != f->capacity )
{
f->buffers[f->whereToPush] = *b;
f->whereToPush++;
f->whereToPush %= ( f->capacity + 1 );
HBLockUnlock( f->lock );
*b = NULL;
return 1;
}
HBLockUnlock( f->lock );
return 0;
}
static inline HBBuffer * HBFifoPop( HBFifo * f )
{
HBLockLock( f->lock );
if( f->whereToPush != f->whereToPop )
{
HBBuffer * b = f->buffers[f->whereToPop];
f->whereToPop++;
f->whereToPop %= ( f->capacity + 1 );
HBLockUnlock( f->lock );
return b;
}
HBLockUnlock( f->lock );
return NULL;
}
static inline int HBFifoWait( HBFifo * f )
{
HBLockLock( f->lock );
if( f->whereToPush != f->whereToPop )
{
HBLockUnlock( f->lock );
return 1;
}
if( f->die )
{
HBLockUnlock( f->lock );
return 0;
}
HBCondWait( f->cond, f->lock );
if( f->whereToPush != f->whereToPop )
{
HBLockUnlock( f->lock );
return 1;
}
HBLockUnlock( f->lock );
return 0;
}
static inline float HBFifoPosition( HBFifo * f )
{
float pos;
HBLockLock( f->lock );
if( f->whereToPush != f->whereToPop )
{
pos = f->buffers[f->whereToPop]->position;
}
else
{
pos = 0.0;
}
HBLockUnlock( f->lock );
return pos;
}
static inline int HBFifoGetBytes( HBFifo * f, uint8_t * data, int nb,
float * position )
{
int whereToPop, bytes = 0;
HBBuffer * buffer;
HBLockLock( f->lock );
/* Do we have enough? */
for( whereToPop = f->whereToPop; ; whereToPop++ )
{
whereToPop %= ( f->capacity + 1 );
if( f->whereToPush == whereToPop )
{
/* We hit the end of the fifo */
break;
}
bytes += f->buffers[whereToPop]->size -
f->buffers[whereToPop]->_pos;
if( bytes >= nb )
{
break;
}
}
if( bytes < nb )
{
/* Not enough data */
HBLockUnlock( f->lock );
return 0;
}
for( bytes = 0; bytes < nb; )
{
int copy;
buffer = f->buffers[f->whereToPop];
copy = MIN( nb - bytes, buffer->size - buffer->_pos );
memcpy( data + bytes, buffer->data + buffer->_pos, copy );
(*position) = buffer->position;
buffer->_pos += copy;
bytes += copy;
if( buffer->_pos == buffer->size )
{
HBBufferClose( &buffer );
f->whereToPop++;
f->whereToPop %= ( f->capacity + 1 );
}
}
HBLockUnlock( f->lock );
return 1;
}
#endif
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