first

1 files changed, 84 insertions, 0 deletions

diff --git a/source/io/SampleSourceSilence.c b/source/io/SampleSourceSilence.c
new file mode 100644
index 0000000..37136e2
--- /dev/null
+++ b/source/io/SampleSourceSilence.c
@@ -0,0 +1,84 @@
+//
+// SampleSourceSilence.c - MrsWatson
+// Created by Nik Reiman on 1/5/12.
+// Copyright (c) 2012 Teragon Audio. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// * Redistributions of source code must retain the above copyright notice,
+//   this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above copyright notice,
+//   this list of conditions and the following disclaimer in the documentation
+//   and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "audio/AudioSettings.h"
+#include "io/SampleSource.h"
+#include "logging/EventLogger.h"
+
+static boolByte _openSampleSourceSilence(void *sampleSourcePtr, const SampleSourceOpenAs openAs)
+{
+    SampleSource sampleSource = (SampleSource)sampleSourcePtr;
+    sampleSource->openedAs = openAs;
+    return true;
+}
+
+static void _closeSampleSourceSilence(void *sampleSourcePtr)
+{
+}
+
+static boolByte _readBlockFromSilence(void *sampleSourcePtr, SampleBuffer sampleBuffer)
+{
+    unsigned long samplesRead = sampleBuffer->blocksize * sampleBuffer->numChannels;
+    sampleBufferClear(sampleBuffer);
+    ((SampleSource)sampleSourcePtr)->numSamplesProcessed += sampleBuffer->blocksize * sampleBuffer->numChannels;
+    logDebug("Read %d samples from silence source", samplesRead);
+    return true;
+}
+
+static boolByte _writeBlockToSilence(void *sampleSourcePtr, const SampleBuffer sampleBuffer)
+{
+    unsigned long samplesWritten = sampleBuffer->blocksize * sampleBuffer->numChannels;
+    ((SampleSource)sampleSourcePtr)->numSamplesProcessed += samplesWritten;
+    logDebug("Wrote %d samples to silence source", samplesWritten);
+    return true;
+}
+
+static void _freeInputSourceDataSilence(void *sampleSourceDataPtr)
+{
+}
+
+SampleSource _newSampleSourceSilence(void)
+{
+    SampleSource sampleSource = (SampleSource)malloc(sizeof(SampleSourceMembers));
+
+    sampleSource->sampleSourceType = SAMPLE_SOURCE_TYPE_SILENCE;
+    sampleSource->openedAs = SAMPLE_SOURCE_OPEN_NOT_OPENED;
+    sampleSource->sourceName = newCharString();
+    charStringCopyCString(sampleSource->sourceName, "(silence)");
+    sampleSource->numSamplesProcessed = 0;
+
+    sampleSource->openSampleSource = _openSampleSourceSilence;
+    sampleSource->closeSampleSource = _closeSampleSourceSilence;
+    sampleSource->readSampleBlock = _readBlockFromSilence;
+    sampleSource->writeSampleBlock = _writeBlockToSilence;
+    sampleSource->freeSampleSourceData = _freeInputSourceDataSilence;
+
+    return sampleSource;
+}