From 3a5a59ed8555390400ef1a1e2c5d6ed9dfcaefa2 Mon Sep 17 00:00:00 2001
From: Michael Goddard <michael.goddard@nokia.com>
Date: Mon, 9 Jul 2012 16:51:50 +1000
Subject: Add 32 bit support (int/float) support to audioinput example.

Change-Id: Ib7160f60af36cdccfe91a620f5555189792c13c4
Reviewed-by: Dmytro Poplavskiy <dmytro.poplavskiy@nokia.com>
---
 examples/audioinput/audioinput.cpp | 34 ++++++++++++++++++++++++++++++++--
 examples/audioinput/audioinput.h   |  2 +-
 2 files changed, 33 insertions(+), 3 deletions(-)

(limited to 'examples')

diff --git a/examples/audioinput/audioinput.cpp b/examples/audioinput/audioinput.cpp
index 44f614532..f7b83dbfc 100644
--- a/examples/audioinput/audioinput.cpp
+++ b/examples/audioinput/audioinput.cpp
@@ -41,6 +41,8 @@
 #include <stdlib.h>
 #include <math.h>
 
+#include <QDateTime>
+
 #include <QDebug>
 #include <QPainter>
 #include <QVBoxLayout>
@@ -91,6 +93,22 @@ AudioInfo::AudioInfo(const QAudioFormat &format, QObject *parent)
             break;
         }
         break;
+
+    case 32:
+        switch (m_format.sampleType()) {
+        case QAudioFormat::UnSignedInt:
+            m_maxAmplitude = 0xffffffff;
+            break;
+        case QAudioFormat::SignedInt:
+            m_maxAmplitude = 0x7fffffff;
+            break;
+        case QAudioFormat::Float:
+            m_maxAmplitude = 0x7fffffff; // Kind of
+        default:
+            break;
+        }
+        break;
+
     default:
         break;
     }
@@ -127,12 +145,12 @@ qint64 AudioInfo::writeData(const char *data, qint64 len)
         Q_ASSERT(len % sampleBytes == 0);
         const int numSamples = len / sampleBytes;
 
-        quint16 maxValue = 0;
+        quint32 maxValue = 0;
         const unsigned char *ptr = reinterpret_cast<const unsigned char *>(data);
 
         for (int i = 0; i < numSamples; ++i) {
             for (int j = 0; j < m_format.channelCount(); ++j) {
-                quint16 value = 0;
+                quint32 value = 0;
 
                 if (m_format.sampleSize() == 8 && m_format.sampleType() == QAudioFormat::UnSignedInt) {
                     value = *reinterpret_cast<const quint8*>(ptr);
@@ -148,6 +166,18 @@ qint64 AudioInfo::writeData(const char *data, qint64 len)
                         value = qAbs(qFromLittleEndian<qint16>(ptr));
                     else
                         value = qAbs(qFromBigEndian<qint16>(ptr));
+                } else if (m_format.sampleSize() == 32 && m_format.sampleType() == QAudioFormat::UnSignedInt) {
+                    if (m_format.byteOrder() == QAudioFormat::LittleEndian)
+                        value = qFromLittleEndian<quint32>(ptr);
+                    else
+                        value = qFromBigEndian<quint32>(ptr);
+                } else if (m_format.sampleSize() == 32 && m_format.sampleType() == QAudioFormat::SignedInt) {
+                    if (m_format.byteOrder() == QAudioFormat::LittleEndian)
+                        value = qAbs(qFromLittleEndian<qint32>(ptr));
+                    else
+                        value = qAbs(qFromBigEndian<qint32>(ptr));
+                } else if (m_format.sampleSize() == 32 && m_format.sampleType() == QAudioFormat::Float) {
+                    value = qAbs(*reinterpret_cast<const float*>(ptr) * 0x7fffffff); // assumes 0-1.0
                 }
 
                 maxValue = qMax(value, maxValue);
diff --git a/examples/audioinput/audioinput.h b/examples/audioinput/audioinput.h
index 3970cca61..9ef8132a3 100644
--- a/examples/audioinput/audioinput.h
+++ b/examples/audioinput/audioinput.h
@@ -69,7 +69,7 @@ public:
 
 private:
     const QAudioFormat m_format;
-    quint16 m_maxAmplitude;
+    quint32 m_maxAmplitude;
     qreal m_level; // 0.0 <= m_level <= 1.0
 
 signals:
-- 
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