From abcbcece2988d36fe88116fae429685430452689 Mon Sep 17 00:00:00 2001
From: Justin McPherson <justin.mcpherson@nokia.com>
Date: Tue, 16 Mar 2010 10:12:21 +1000
Subject: Use AudioConverter when not preferred format.

Reviewed-by:Dmytro Poplavskiy
---
 src/multimedia/audio/qaudioinput_mac_p.cpp | 58 ++++++++++++++++--------------
 src/multimedia/audio/qaudioinput_mac_p.h   |  2 ++
 2 files changed, 34 insertions(+), 26 deletions(-)

diff --git a/src/multimedia/audio/qaudioinput_mac_p.cpp b/src/multimedia/audio/qaudioinput_mac_p.cpp
index 1db5866..4b37b18 100644
--- a/src/multimedia/audio/qaudioinput_mac_p.cpp
+++ b/src/multimedia/audio/qaudioinput_mac_p.cpp
@@ -54,12 +54,11 @@
 #include <QtCore/qtimer.h>
 #include <QtCore/qdebug.h>
 
-#include <QtMultimedia/qaudiodeviceinfo.h>
 #include <QtMultimedia/qaudioinput.h>
 
 #include "qaudio_mac_p.h"
 #include "qaudioinput_mac_p.h"
-
+#include "qaudiodeviceinfo_mac_p.h"
 
 QT_BEGIN_NAMESPACE
 
@@ -241,7 +240,7 @@ public:
         m_flushTimer = new QTimer(this);
         connect(m_flushTimer, SIGNAL(timeout()), SLOT(flushBuffer()));
 
-        if (inputFormat.mSampleRate != outputFormat.mSampleRate) {
+        if (toQAudioFormat(inputFormat) != toQAudioFormat(outputFormat)) {
             if (AudioConverterNew(&m_inputFormat, &m_outputFormat, &m_audioConverter) != noErr) {
                 qWarning() << "QAudioInput: Unable to create an Audio Converter";
                 m_audioConverter = 0;
@@ -520,6 +519,7 @@ QAudioInputPrivate::QAudioInputPrivate(const QByteArray& device, QAudioFormat co
     if (QAudio::Mode(mode) == QAudio::AudioOutput)
         errorCode = QAudio::OpenError;
     else {
+        audioDeviceInfo = new QAudioDeviceInfoInternal(device, QAudio::AudioInput);
         isOpen = false;
         audioDeviceId = AudioDeviceID(did);
         audioUnit = 0;
@@ -540,6 +540,7 @@ QAudioInputPrivate::QAudioInputPrivate(const QByteArray& device, QAudioFormat co
 QAudioInputPrivate::~QAudioInputPrivate()
 {
     close();
+    delete audioDeviceInfo;
 }
 
 bool QAudioInputPrivate::open()
@@ -577,7 +578,7 @@ bool QAudioInputPrivate::open()
                                1,
                                &enable,
                                sizeof(enable)) != noErr) {
-        qWarning() << "QAudioInput: Unabled to switch to input mode (Enable Input)";
+        qWarning() << "QAudioInput: Unable to switch to input mode (Enable Input)";
         return false;
     }
 
@@ -588,7 +589,7 @@ bool QAudioInputPrivate::open()
                             0,
                             &enable,
                             sizeof(enable)) != noErr) {
-        qWarning() << "QAudioInput: Unabled to switch to input mode (Disable output)";
+        qWarning() << "QAudioInput: Unable to switch to input mode (Disable output)";
         return false;
     }
 
@@ -619,35 +620,40 @@ bool QAudioInputPrivate::open()
     }
 
     // Set format
+    // Wanted
     streamFormat = toAudioStreamBasicDescription(audioFormat);
 
-    size = sizeof(deviceFormat);
-    if (AudioUnitGetProperty(audioUnit,
-                                kAudioUnitProperty_StreamFormat,
-                                kAudioUnitScope_Input,
-                                1,
-                                &deviceFormat,
-                                &size) != noErr) {
-        qWarning() << "QAudioInput: Unable to retrieve device format";
-        return false;
-    }
-
-    // If the device frequency is different to the requested use a converter
-    if (deviceFormat.mSampleRate != streamFormat.mSampleRate) {
-         AudioUnitSetProperty(audioUnit,
+    // Required on unit
+    if (audioFormat == audioDeviceInfo->preferredFormat()) {
+        deviceFormat = streamFormat;
+        AudioUnitSetProperty(audioUnit,
                                kAudioUnitProperty_StreamFormat,
                                kAudioUnitScope_Output,
                                1,
                                &deviceFormat,
-                               sizeof(streamFormat));
+                               sizeof(deviceFormat));
     }
     else {
-        AudioUnitSetProperty(audioUnit,
-                               kAudioUnitProperty_StreamFormat,
-                               kAudioUnitScope_Output,
-                               1,
-                               &streamFormat,
-                               sizeof(streamFormat));
+        size = sizeof(deviceFormat);
+        if (AudioUnitGetProperty(audioUnit,
+                                    kAudioUnitProperty_StreamFormat,
+                                    kAudioUnitScope_Input,
+                                    1,
+                                    &deviceFormat,
+                                    &size) != noErr) {
+            qWarning() << "QAudioInput: Unable to retrieve device format";
+            return false;
+        }
+
+        if (AudioUnitSetProperty(audioUnit,
+                                   kAudioUnitProperty_StreamFormat,
+                                   kAudioUnitScope_Output,
+                                   1,
+                                   &deviceFormat,
+                                   sizeof(deviceFormat)) != noErr) {
+            qWarning() << "QAudioInput: Unable to set device format";
+            return false;
+        }
     }
 
     // Setup buffers
diff --git a/src/multimedia/audio/qaudioinput_mac_p.h b/src/multimedia/audio/qaudioinput_mac_p.h
index 42f90e2..7aa4168 100644
--- a/src/multimedia/audio/qaudioinput_mac_p.h
+++ b/src/multimedia/audio/qaudioinput_mac_p.h
@@ -74,6 +74,7 @@ QT_BEGIN_NAMESPACE
 
 class QTimer;
 class QIODevice;
+class QAbstractAudioDeviceInfo;
 
 namespace QtMultimediaInternal
 {
@@ -104,6 +105,7 @@ public:
     QTimer*         intervalTimer;
     AudioStreamBasicDescription streamFormat;
     AudioStreamBasicDescription deviceFormat;
+    QAbstractAudioDeviceInfo *audioDeviceInfo;
 
     QAudioInputPrivate(const QByteArray& device, QAudioFormat const& format);
     ~QAudioInputPrivate();
-- 
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