diff options
Diffstat (limited to 'pd/portaudio_v18/pablio/ringbuffer_pd.c')
| -rw-r--r-- | pd/portaudio_v18/pablio/ringbuffer_pd.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/pd/portaudio_v18/pablio/ringbuffer_pd.c b/pd/portaudio_v18/pablio/ringbuffer_pd.c index 97e060c1..0b2c4da5 100644 --- a/pd/portaudio_v18/pablio/ringbuffer_pd.c +++ b/pd/portaudio_v18/pablio/ringbuffer_pd.c @@ -1,5 +1,5 @@ /* - * $Id: ringbuffer_pd.c,v 1.1.1.1 2003-05-09 16:04:00 ggeiger Exp $ + * $Id: ringbuffer_pd.c,v 1.1.1.2 2004-02-02 11:27:58 ggeiger Exp $ * ringbuffer.c * Ring Buffer utility.. * @@ -58,9 +58,12 @@ long RingBuffer_Init( RingBuffer *rbuf, long numBytes, void *dataPtr ) ** Return number of bytes available for reading. */ long RingBuffer_GetReadAvailable( RingBuffer *rbuf ) { - long ret = (rbuf->writeIndex - rbuf->readIndex) + rbuf->bufferSize; - if (ret >= 2 * rbuf->bufferSize) - ret -= 2 * rbuf->bufferSize; + long ret = rbuf->writeIndex - rbuf->readIndex; + if (ret < 0) + ret += 2 * rbuf->bufferSize; + if (ret < 0 || ret > rbuf->bufferSize) + fprintf(stderr, + "consistency check failed: RingBuffer_GetReadAvailable\n"); return ( ret ); } /*************************************************************************** @@ -119,7 +122,7 @@ long RingBuffer_GetWriteRegions( RingBuffer *rbuf, long numBytes, long RingBuffer_AdvanceWriteIndex( RingBuffer *rbuf, long numBytes ) { long ret = (rbuf->writeIndex + numBytes); - if ( ret > 2 * rbuf->bufferSize) + if ( ret >= 2 * rbuf->bufferSize) ret -= 2 * rbuf->bufferSize; /* check for end of buffer */ return rbuf->writeIndex = ret; } @@ -139,7 +142,7 @@ long RingBuffer_GetReadRegions( RingBuffer *rbuf, long numBytes, if( numBytes > available ) numBytes = available; /* Check to see if read is not contiguous. */ index = rbuf->readIndex; - while (index > rbuf->bufferSize) + while (index >= rbuf->bufferSize) index -= rbuf->bufferSize; if( (index + numBytes) > rbuf->bufferSize ) @@ -165,7 +168,7 @@ long RingBuffer_GetReadRegions( RingBuffer *rbuf, long numBytes, long RingBuffer_AdvanceReadIndex( RingBuffer *rbuf, long numBytes ) { long ret = (rbuf->readIndex + numBytes); - if( ret > 2 * rbuf->bufferSize) + if( ret >= 2 * rbuf->bufferSize) ret -= 2 * rbuf->bufferSize; return rbuf->readIndex = ret; } |