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/****************************************************************************
**
** Copyright (C) 2022 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
******************************************************************************/
#include "avfcamerasession_p.h"
#include "avfaudiopreviewdelegate_p.h"
QT_USE_NAMESPACE
@implementation AVFAudioPreviewDelegate
{
@private
AVSampleBufferAudioRenderer *m_audioRenderer;
AVFCameraSession *m_session;
AVSampleBufferRenderSynchronizer *m_audioBufferSynchronizer;
dispatch_queue_t m_audioPreviewQueue;
}
- (id)init
{
if (self = [super init]) {
m_session = nil;
m_audioBufferSynchronizer = [[AVSampleBufferRenderSynchronizer alloc] init];
m_audioRenderer = [[AVSampleBufferAudioRenderer alloc] init];
[m_audioBufferSynchronizer addRenderer:m_audioRenderer];
return self;
}
return nil;
}
- (void)captureOutput:(AVCaptureOutput *)captureOutput
didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
fromConnection:(AVCaptureConnection *)connection
{
Q_UNUSED(connection);
Q_ASSERT(m_session);
if (!CMSampleBufferDataIsReady(sampleBuffer)) {
qWarning() << Q_FUNC_INFO << "sample buffer is not ready, skipping.";
return;
}
CFRetain(sampleBuffer);
dispatch_async(m_audioPreviewQueue, ^{
[self renderAudioSampleBuffer:sampleBuffer];
CFRelease(sampleBuffer);
});
}
- (void)renderAudioSampleBuffer:(CMSampleBufferRef)sampleBuffer
{
Q_ASSERT(sampleBuffer);
Q_ASSERT(m_session);
if (m_audioBufferSynchronizer && m_audioRenderer) {
[m_audioRenderer enqueueSampleBuffer:sampleBuffer];
if (m_audioBufferSynchronizer.rate == 0)
[m_audioBufferSynchronizer setRate:1 time:CMSampleBufferGetPresentationTimeStamp(sampleBuffer)];
}
}
- (void)resetAudioPreviewDelegate
{
[m_session->audioOutput() setSampleBufferDelegate:self queue:m_audioPreviewQueue];
}
- (void)setupWithCaptureSession: (AVFCameraSession*)session
audioOutputDevice: (NSString*)deviceId
{
m_session = session;
m_audioPreviewQueue = dispatch_queue_create("audio-preview-queue", nullptr);
[m_session->audioOutput() setSampleBufferDelegate:self queue:m_audioPreviewQueue];
#ifdef Q_OS_MACOS
m_audioRenderer.audioOutputDeviceUniqueID = deviceId;
#endif
}
- (void)setVolume: (float)volume
{
m_audioRenderer.volume = volume;
}
- (void)setMuted: (bool)muted
{
m_audioRenderer.muted = muted;
}
-(void)dealloc {
m_session = nil;
[m_audioRenderer release];
[m_audioBufferSynchronizer release];
dispatch_release(m_audioPreviewQueue);
[super dealloc];
}
@end
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