API review: Allow synthesize callbacks that take a QAudioBuffer

Formally, QAudioBuffer is the right type for carrying audio data, but
it's hardly used in Qt Multimedia itself, and not very practical to use
for writing the received PCM data to a file or to stream it out to a
QAudioSink (which operators on a QIODevice, e.g. with a byte array).

Nevertheless, allow a callback to take a QAudioBuffer instead of
QAudioFormat and QByteArray, as the QAudioBuffer facilities might be
useful for some use cases.

Change-Id: I260a4cf6cf91f57356373f4ef9cf248927159b40
Reviewed-by: Axel Spoerl <axel.spoerl@qt.io>

1 files changed, 11 insertions, 0 deletions

diff --git a/tests/auto/qtexttospeech/tst_qtexttospeech.cpp b/tests/auto/qtexttospeech/tst_qtexttospeech.cpp
index 701effe..317c683 100644
--- a/tests/auto/qtexttospeech/tst_qtexttospeech.cpp
+++ b/tests/auto/qtexttospeech/tst_qtexttospeech.cpp
@@ -8,6 +8,7 @@
 #include <QMediaDevices>
 #include <QAudioFormat>
 #include <QAudioDevice>
+#include <QAudioBuffer>
 #include <QOperatingSystemVersion>
 #include <QRegularExpression>
 #include <qttexttospeech-config.h>
@@ -1063,6 +1064,16 @@ void tst_QTextToSpeech::synthesizeCallback()
     QTRY_COMPARE(tts.state(), QTextToSpeech::Ready);
     QCOMPARE(processor.m_allBytes, QByteArray());
     processor.reset();
+
+    // Taking QAudioBuffer
+    tts.synthesize(text, [&processor](const QAudioBuffer &buffer) {
+        processor.m_format = buffer.format();
+        processor.m_allBytes += QByteArrayView(buffer.data<uchar>(), buffer.byteCount());
+    });
+    QTRY_COMPARE(processor.m_format, expectedFormat);
+    QTRY_COMPARE(tts.state(), QTextToSpeech::Ready);
+    QCOMPARE(processor.m_allBytes, expectedBytes);
+    processor.reset();
 }
 
 QTEST_MAIN(tst_QTextToSpeech)