# HG changeset patch
# User Chris Cannam
# Date 1159887710 0
# Node ID 75c5951cf9d74b58bca416681dbbe2b0c4e169a2
# Parent  f18093617b7872bd35c3df3cce32d60efe1653bc
* Some fixes to updating of writable wave file models

diff -r f18093617b78 -r 75c5951cf9d7 transform/RealTimePluginTransform.cpp
--- a/transform/RealTimePluginTransform.cpp	Tue Oct 03 14:17:37 2006 +0000
+++ b/transform/RealTimePluginTransform.cpp	Tue Oct 03 15:01:50 2006 +0000
@@ -145,24 +145,28 @@
 	size_t got = 0;
 
 	if (channelCount == 1) {
-	    got = input->getValues
-		(m_context.channel, blockFrame, blockFrame + blockSize, buffers[0]);
-	    while (got < blockSize) {
-		buffers[0][got++] = 0.0;
-	    }
-            if (m_context.channel == -1 && channelCount > 1) {
-                // use mean instead of sum, as plugin input
-                for (size_t i = 0; i < got; ++i) {
-                    buffers[0][i] /= channelCount;
+            if (buffers && buffers[0]) {
+                got = input->getValues
+                    (m_context.channel, blockFrame, blockFrame + blockSize, buffers[0]);
+                while (got < blockSize) {
+                    buffers[0][got++] = 0.0;
                 }
-            }                
+                if (m_context.channel == -1 && channelCount > 1) {
+                    // use mean instead of sum, as plugin input
+                    for (size_t i = 0; i < got; ++i) {
+                        buffers[0][i] /= channelCount;
+                    }
+                }                
+            }
 	} else {
 	    for (size_t ch = 0; ch < channelCount; ++ch) {
-		got = input->getValues
-		    (ch, blockFrame, blockFrame + blockSize, buffers[ch]);
-		while (got < blockSize) {
-		    buffers[ch][got++] = 0.0;
-		}
+                if (buffers && buffers[ch]) {
+                    got = input->getValues
+                        (ch, blockFrame, blockFrame + blockSize, buffers[ch]);
+                    while (got < blockSize) {
+                        buffers[ch][got++] = 0.0;
+                    }
+                }
 	    }
 	}
 
@@ -183,17 +187,24 @@
 
             float **buffers = m_plugin->getAudioOutputBuffers();
 
-            if (blockFrame >= latency) {
-                wwfm->addSamples(buffers, blockSize);
-            } else if (blockFrame + blockSize >= latency) {
-                size_t offset = latency - blockFrame;
-                size_t count = blockSize - offset;
-                float **tmp = new float *[channelCount];
-                for (size_t c = 0; c < channelCount; ++c) {
-                    tmp[c] = buffers[c] + offset;
+            if (buffers) {
+
+                //!!! This will fail if any buffers[c] is null or
+                //uninitialised.  The plugin instance should ensure
+                //that that can't happen -- but it doesn't
+
+                if (blockFrame >= latency) {
+                    wwfm->addSamples(buffers, blockSize);
+                } else if (blockFrame + blockSize >= latency) {
+                    size_t offset = latency - blockFrame;
+                    size_t count = blockSize - offset;
+                    float **tmp = new float *[channelCount];
+                    for (size_t c = 0; c < channelCount; ++c) {
+                        tmp[c] = buffers[c] + offset;
+                    }
+                    wwfm->addSamples(tmp, count);
+                    delete[] tmp;
                 }
-                wwfm->addSamples(tmp, count);
-                delete[] tmp;
             }
         }