From 4234a11442e673e4b96c4b0a9e707dcb15b01497 Mon Sep 17 00:00:00 2001
From: Fabrizio Gennari <fabrizio.ge@tiscali.it>
Date: Thu, 1 Oct 2015 22:51:14 +0200
Subject: [PATCH 1/2] Do not corrupt files when changing both number of
 channels and sample format

---
 libaudiofile/modules/ModuleState.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libaudiofile/modules/ModuleState.cpp b/libaudiofile/modules/ModuleState.cpp
index f76c495..0c29d7a 100644
--- a/libaudiofile/modules/ModuleState.cpp
+++ b/libaudiofile/modules/ModuleState.cpp
@@ -402,7 +402,7 @@ status ModuleState::arrange(AFfilehandle file, Track *track)
 		addModule(new Transform(outfc, in.pcm, out.pcm));
 
 	if (in.channelCount != out.channelCount)
-		addModule(new ApplyChannelMatrix(infc, isReading,
+		addModule(new ApplyChannelMatrix(outfc, isReading,
 			in.channelCount, out.channelCount,
 			in.pcm.minClip, in.pcm.maxClip,
 			track->channelMatrix));

From 1debf51f3a89d44c0bd46e7bc45c07342087dd7c Mon Sep 17 00:00:00 2001
From: Fabrizio Gennari <fabrizio.ge@tiscali.it>
Date: Sun, 4 Oct 2015 01:14:00 +0200
Subject: [PATCH 2/2] Add a test case for conversion of both sample format and
 number of channels

This patch contains the testcase backport to version 0.3.6.
Author: Stanislav Brabec <sbrabec@suse.com>

https://bugzilla.novell.com/show_bug.cgi?id=949399#c7

---
 test/Makefile.am                    |   2 +
 test/sixteen-stereo-to-eight-mono.c | 118 ++++++++++++++++++++++++++++++++++++
 2 files changed, 120 insertions(+)
 create mode 100644 test/sixteen-stereo-to-eight-mono.c

diff --git a/test/Makefile.am b/test/Makefile.am
index 7bbf8e4..d311719 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -27,6 +27,7 @@ TESTS = \
 	VirtualFile \
 	floatto24 \
 	query2 \
+	sixteen-stereo-to-eight-mono \
 	sixteen-to-eight \
 	testchannelmatrix \
 	testdouble \
@@ -143,6 +144,7 @@ printmarkers_SOURCES = printmarkers.c
 printmarkers_LDADD = $(LIBAUDIOFILE) -lm
 
 sixteen_to_eight_SOURCES = sixteen-to-eight.c TestUtilities.cpp TestUtilities.h
+sixteen_stereo_to_eight_mono_SOURCES = sixteen-stereo-to-eight-mono.c TestUtilities.cpp TestUtilities.h
 
 testchannelmatrix_SOURCES = testchannelmatrix.c TestUtilities.cpp TestUtilities.h
 
diff --git a/test/sixteen-stereo-to-eight-mono.c b/test/sixteen-stereo-to-eight-mono.c
new file mode 100644
index 0000000..0f14636
--- /dev/null
+++ b/test/sixteen-stereo-to-eight-mono.c
@@ -0,0 +1,117 @@
+/*
+	Audio File Library
+
+	Copyright 2000, Silicon Graphics, Inc.
+
+	This program is free software; you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation; either version 2 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License along
+	with this program; if not, write to the Free Software Foundation, Inc.,
+	51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+/*
+	sixteen-stereo-to-eight-mono.c
+
+	This program tests the conversion from 2-channel 16-bit integers to
+	1-channel 8-bit	integers.
+*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <limits.h>
+
+#include <audiofile.h>
+
+#include "TestUtilities.h"
+
+int main (int argc, char **argv)
+{
+	AFfilehandle file;
+	AFfilesetup setup;
+	int16_t frames16[] = {14298, 392, 3923, -683, 958, -1921};
+	int8_t frames8[] = {28, 6, -2};
+	int i, frameCount = 3;
+	int8_t byte;
+	AFframecount result;
+
+	setup = afNewFileSetup();
+
+	afInitFileFormat(setup, AF_FILE_WAVE);
+
+	afInitSampleFormat(setup, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
+	afInitChannels(setup, AF_DEFAULT_TRACK, 2);
+
+	char testFileName[PATH_MAX];
+	if (!createTemporaryFile("sixteen-to-eight", &testFileName))
+	{
+		fprintf(stderr, "Could not create temporary file.\n");
+		exit(EXIT_FAILURE);
+	}
+
+	file = afOpenFile(testFileName, "w", setup);
+	if (file == AF_NULL_FILEHANDLE)
+	{
+		fprintf(stderr, "could not open file for writing\n");
+		exit(EXIT_FAILURE);
+	}
+
+	afFreeFileSetup(setup);
+
+	afWriteFrames(file, AF_DEFAULT_TRACK, frames16, frameCount);
+
+	afCloseFile(file);
+
+	file = afOpenFile(testFileName, "r", AF_NULL_FILESETUP);
+	if (file == AF_NULL_FILEHANDLE)
+	{
+		fprintf(stderr, "could not open file for reading\n");
+		exit(EXIT_FAILURE);
+	}
+
+	afSetVirtualSampleFormat(file, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 8);
+	afSetVirtualChannels(file, AF_DEFAULT_TRACK, 1);
+
+	for (i=0; i<frameCount; i++)
+	{
+		/* Read one frame. */
+		result = afReadFrames(file, AF_DEFAULT_TRACK, &byte, 1);
+
+		if (result != 1)
+			break;
+
+		/* Compare the byte read with its precalculated value. */
+		if (memcmp(&byte, &frames8[i], 1) != 0)
+		{
+			printf("error\n");
+			printf("expected %d, got %d\n", frames8[i], byte);
+			exit(EXIT_FAILURE);
+		}
+		else
+		{
+#ifdef DEBUG
+			printf("got what was expected: %d\n", byte);
+#endif
+		}
+	}
+
+	afCloseFile(file);
+	unlink(testFileName);
+
+	exit(EXIT_SUCCESS);
+}