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avfaudiopreviewdelegate.mm
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1// Copyright (C) 2021 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#include "avfcamerasession_p.h"
5#include "avfaudiopreviewdelegate_p.h"
6
7QT_USE_NAMESPACE
8
9@implementation AVFAudioPreviewDelegate
10{
11@private
12 AVSampleBufferAudioRenderer *m_audioRenderer;
13 AVFCameraSession *m_session;
14 AVSampleBufferRenderSynchronizer *m_audioBufferSynchronizer;
15 dispatch_queue_t m_audioPreviewQueue;
16}
17
18- (id)init
19{
20 if (self = [super init]) {
21 m_session = nil;
22 m_audioBufferSynchronizer = [[AVSampleBufferRenderSynchronizer alloc] init];
23 m_audioRenderer = [[AVSampleBufferAudioRenderer alloc] init];
24 [m_audioBufferSynchronizer addRenderer:m_audioRenderer];
25 return self;
26 }
27 return nil;
28}
29
30- (void)captureOutput:(AVCaptureOutput *)captureOutput
31 didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
32 fromConnection:(AVCaptureConnection *)connection
33{
34 Q_UNUSED(connection);
35 Q_ASSERT(m_session);
36
37 if (!CMSampleBufferDataIsReady(sampleBuffer)) {
38 qWarning() << Q_FUNC_INFO << "sample buffer is not ready, skipping.";
39 return;
40 }
41
42 CFRetain(sampleBuffer);
43
44 dispatch_async(m_audioPreviewQueue, ^{
45 [self renderAudioSampleBuffer:sampleBuffer];
46 CFRelease(sampleBuffer);
47 });
48}
49
50- (void)renderAudioSampleBuffer:(CMSampleBufferRef)sampleBuffer
51{
52 Q_ASSERT(sampleBuffer);
53 Q_ASSERT(m_session);
54
55 if (m_audioBufferSynchronizer && m_audioRenderer) {
56 [m_audioRenderer enqueueSampleBuffer:sampleBuffer];
57 if (m_audioBufferSynchronizer.rate == 0)
58 [m_audioBufferSynchronizer setRate:1 time:CMSampleBufferGetPresentationTimeStamp(sampleBuffer)];
59 }
60}
61
62- (void)resetAudioPreviewDelegate
63{
64 [m_session->audioOutput() setSampleBufferDelegate:self queue:m_audioPreviewQueue];
65}
66
67- (void)setupWithCaptureSession: (AVFCameraSession*)session
68 audioOutputDevice: (NSString*)deviceId
69{
70 m_session = session;
71
72 m_audioPreviewQueue = dispatch_queue_create("audio-preview-queue", nullptr);
73 [m_session->audioOutput() setSampleBufferDelegate:self queue:m_audioPreviewQueue];
74#ifdef Q_OS_MACOS
75 m_audioRenderer.audioOutputDeviceUniqueID = deviceId;
76#endif
77}
78
79- (void)setVolume: (float)volume
80{
81 m_audioRenderer.volume = volume;
82}
83
84- (void)setMuted: (bool)muted
85{
86 m_audioRenderer.muted = muted;
87}
88
89-(void)dealloc {
90 m_session = nil;
91 [m_audioRenderer release];
92 [m_audioBufferSynchronizer release];
93 dispatch_release(m_audioPreviewQueue);
94
95 [super dealloc];
96}
97
98@end
m_audioBufferSynchronizer
AVSampleBufferRenderSynchronizer * m_audioBufferSynchronizer
Definition avfaudiopreviewdelegate.mm:14
m_audioPreviewQueue
dispatch_queue_t m_audioPreviewQueue
Definition avfaudiopreviewdelegate.mm:15
m_session
AVFCameraSession * m_session
Definition avfaudiopreviewdelegate.mm:13
avfaudiopreviewdelegate_p.h
avfcamerasession_p.h
QT_USE_NAMESPACE
Definition avfmediaassetwriter.mm:18
Q_FUNC_INFO
#define Q_FUNC_INFO
Definition qcompilerdetection.h:1071
void
DBusConnection const char DBusError DBusBusType DBusError return DBusConnection DBusHandleMessageFunction void DBusFreeFunction return DBusConnection return DBusConnection return const char DBusError return DBusConnection DBusMessage dbus_uint32_t return DBusConnection dbus_bool_t DBusConnection DBusAddWatchFunction DBusRemoveWatchFunction DBusWatchToggledFunction void DBusFreeFunction return DBusConnection DBusDispatchStatusFunction void DBusFreeFunction DBusTimeout return DBusTimeout return DBusWatch return DBusWatch unsigned int return DBusError const DBusError return const DBusMessage return DBusMessage return DBusMessage return DBusMessage return DBusMessage return DBusMessage return DBusMessageIter int const void return DBusMessageIter DBusMessageIter return DBusMessageIter void DBusMessageIter void int return DBusMessage DBusMessageIter return DBusMessageIter return DBusMessageIter DBusMessageIter const char const char const char const char return DBusMessage return DBusMessage const char return DBusMessage dbus_bool_t return DBusMessage dbus_uint32_t return DBusMessage void
Definition qdbus_symbols_p.h:409
connection
DBusConnection * connection
Definition qdbus_symbols_p.h:163
qWarning
#define qWarning
Definition qlogging.h:166
id
GLenum GLuint id
[7]
Definition qopengles2ext.h:151
Q_ASSERT
#define Q_ASSERT(cond)
Definition qrandom.cpp:47
init
static QT_BEGIN_NAMESPACE void init(QTextBoundaryFinder::BoundaryType type, QStringView str, QCharAttributes *attributes)
Definition qtextboundaryfinder.cpp:10
Q_UNUSED
#define Q_UNUSED(x)
Definition qtpreprocessorsupport.h:20