aboutsummaryrefslogtreecommitdiff
path: root/pd/portaudio/pablio/ringbuffer.c
diff options
context:
space:
mode:
Diffstat (limited to 'pd/portaudio/pablio/ringbuffer.c')
-rw-r--r--pd/portaudio/pablio/ringbuffer.c199
1 files changed, 0 insertions, 199 deletions
diff --git a/pd/portaudio/pablio/ringbuffer.c b/pd/portaudio/pablio/ringbuffer.c
deleted file mode 100644
index 3901f598..00000000
--- a/pd/portaudio/pablio/ringbuffer.c
+++ /dev/null
@@ -1,199 +0,0 @@
-/*
- * $Id: ringbuffer.c,v 1.22 2007-08-06 16:39:54 millerpuckette Exp $
- * ringbuffer.c
- * Ring Buffer utility..
- *
- * Author: Phil Burk, http://www.softsynth.com
- *
- * This program uses the PortAudio Portable Audio Library.
- * For more information see: http://www.audiomulch.com/portaudio/
- * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files
- * (the "Software"), to deal in the Software without restriction,
- * including without limitation the rights to use, copy, modify, merge,
- * publish, distribute, sublicense, and/or sell copies of the Software,
- * and to permit persons to whom the Software is furnished to do so,
- * subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * Any person wishing to distribute modifications to the Software is
- * requested to send the modifications to the original developer so that
- * they can be incorporated into the canonical version.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
- * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
- * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- */
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-#include "ringbuffer.h"
-#include <string.h>
-
-/***************************************************************************
- * Initialize FIFO.
- * numBytes must be power of 2, returns -1 if not.
- */
-long RingBuffer_Init( RingBuffer *rbuf, long numBytes, void *dataPtr )
-{
- if( ((numBytes-1) & numBytes) != 0) return -1; /* Not Power of two. */
- rbuf->bufferSize = numBytes;
- rbuf->buffer = (char *)dataPtr;
- RingBuffer_Flush( rbuf );
- rbuf->bigMask = (numBytes*2)-1;
- rbuf->smallMask = (numBytes)-1;
- return 0;
-}
-/***************************************************************************
-** Return number of bytes available for reading. */
-long RingBuffer_GetReadAvailable( RingBuffer *rbuf )
-{
- return ( (rbuf->writeIndex - rbuf->readIndex) & rbuf->bigMask );
-}
-/***************************************************************************
-** Return number of bytes available for writing. */
-long RingBuffer_GetWriteAvailable( RingBuffer *rbuf )
-{
- return ( rbuf->bufferSize - RingBuffer_GetReadAvailable(rbuf));
-}
-
-/***************************************************************************
-** Clear buffer. Should only be called when buffer is NOT being read. */
-void RingBuffer_Flush( RingBuffer *rbuf )
-{
- rbuf->writeIndex = rbuf->readIndex = 0;
-}
-
-/***************************************************************************
-** Get address of region(s) to which we can write data.
-** If the region is contiguous, size2 will be zero.
-** If non-contiguous, size2 will be the size of second region.
-** Returns room available to be written or numBytes, whichever is smaller.
-*/
-long RingBuffer_GetWriteRegions( RingBuffer *rbuf, long numBytes,
- void **dataPtr1, long *sizePtr1,
- void **dataPtr2, long *sizePtr2 )
-{
- long index;
- long available = RingBuffer_GetWriteAvailable( rbuf );
- if( numBytes > available ) numBytes = available;
- /* Check to see if write is not contiguous. */
- index = rbuf->writeIndex & rbuf->smallMask;
- if( (index + numBytes) > rbuf->bufferSize )
- {
- /* Write data in two blocks that wrap the buffer. */
- long firstHalf = rbuf->bufferSize - index;
- *dataPtr1 = &rbuf->buffer[index];
- *sizePtr1 = firstHalf;
- *dataPtr2 = &rbuf->buffer[0];
- *sizePtr2 = numBytes - firstHalf;
- }
- else
- {
- *dataPtr1 = &rbuf->buffer[index];
- *sizePtr1 = numBytes;
- *dataPtr2 = NULL;
- *sizePtr2 = 0;
- }
- return numBytes;
-}
-
-
-/***************************************************************************
-*/
-long RingBuffer_AdvanceWriteIndex( RingBuffer *rbuf, long numBytes )
-{
- return rbuf->writeIndex = (rbuf->writeIndex + numBytes) & rbuf->bigMask;
-}
-
-/***************************************************************************
-** Get address of region(s) from which we can read data.
-** If the region is contiguous, size2 will be zero.
-** If non-contiguous, size2 will be the size of second region.
-** Returns room available to be written or numBytes, whichever is smaller.
-*/
-long RingBuffer_GetReadRegions( RingBuffer *rbuf, long numBytes,
- void **dataPtr1, long *sizePtr1,
- void **dataPtr2, long *sizePtr2 )
-{
- long index;
- long available = RingBuffer_GetReadAvailable( rbuf );
- if( numBytes > available ) numBytes = available;
- /* Check to see if read is not contiguous. */
- index = rbuf->readIndex & rbuf->smallMask;
- if( (index + numBytes) > rbuf->bufferSize )
- {
- /* Write data in two blocks that wrap the buffer. */
- long firstHalf = rbuf->bufferSize - index;
- *dataPtr1 = &rbuf->buffer[index];
- *sizePtr1 = firstHalf;
- *dataPtr2 = &rbuf->buffer[0];
- *sizePtr2 = numBytes - firstHalf;
- }
- else
- {
- *dataPtr1 = &rbuf->buffer[index];
- *sizePtr1 = numBytes;
- *dataPtr2 = NULL;
- *sizePtr2 = 0;
- }
- return numBytes;
-}
-/***************************************************************************
-*/
-long RingBuffer_AdvanceReadIndex( RingBuffer *rbuf, long numBytes )
-{
- return rbuf->readIndex = (rbuf->readIndex + numBytes) & rbuf->bigMask;
-}
-
-/***************************************************************************
-** Return bytes written. */
-long RingBuffer_Write( RingBuffer *rbuf, void *data, long numBytes )
-{
- long size1, size2, numWritten;
- void *data1, *data2;
- numWritten = RingBuffer_GetWriteRegions( rbuf, numBytes, &data1, &size1, &data2, &size2 );
- if( size2 > 0 )
- {
-
- memcpy( data1, data, size1 );
- data = ((char *)data) + size1;
- memcpy( data2, data, size2 );
- }
- else
- {
- memcpy( data1, data, size1 );
- }
- RingBuffer_AdvanceWriteIndex( rbuf, numWritten );
- return numWritten;
-}
-
-/***************************************************************************
-** Return bytes read. */
-long RingBuffer_Read( RingBuffer *rbuf, void *data, long numBytes )
-{
- long size1, size2, numRead;
- void *data1, *data2;
- numRead = RingBuffer_GetReadRegions( rbuf, numBytes, &data1, &size1, &data2, &size2 );
- if( size2 > 0 )
- {
- memcpy( data, data1, size1 );
- data = ((char *)data) + size1;
- memcpy( data, data2, size2 );
- }
- else
- {
- memcpy( data, data1, size1 );
- }
- RingBuffer_AdvanceReadIndex( rbuf, numRead );
- return numRead;
-}