1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd and/or its subsidiary(-ies).
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** 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 http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qwinrtcameravideorenderercontrol.h"
#include <QtCore/qfunctions_winrt.h>
#include <QtCore/QSize>
#include <QtCore/QVector>
#include <d3d11.h>
#include <mfapi.h>
#include <wrl.h>
using namespace Microsoft::WRL;
QT_USE_NAMESPACE
class D3DVideoBlitter
{
public:
D3DVideoBlitter(ID3D11Device *device, ID3D11Texture2D *target)
: m_d3dDevice(device), m_target(target)
{
HRESULT hr;
ComPtr<IDXGIResource> targetResource;
hr = target->QueryInterface(IID_PPV_ARGS(&targetResource));
Q_ASSERT_SUCCEEDED(hr);
HANDLE sharedHandle;
hr = targetResource->GetSharedHandle(&sharedHandle);
Q_ASSERT_SUCCEEDED(hr);
hr = m_d3dDevice->OpenSharedResource(sharedHandle, IID_PPV_ARGS(&m_targetTexture));
Q_ASSERT_SUCCEEDED(hr);
hr = m_d3dDevice.As(&m_videoDevice);
Q_ASSERT_SUCCEEDED(hr);
}
ID3D11Device *device() const
{
return m_d3dDevice.Get();
}
ID3D11Texture2D *target() const
{
return m_target;
}
void blit(ID3D11Texture2D *texture)
{
HRESULT hr;
D3D11_TEXTURE2D_DESC desc;
texture->GetDesc(&desc);
if (!m_videoEnumerator) {
D3D11_VIDEO_PROCESSOR_CONTENT_DESC videoProcessorDesc = {
D3D11_VIDEO_FRAME_FORMAT_PROGRESSIVE,
{ 0 }, desc.Width, desc.Height,
{ 0 }, desc.Width, desc.Height,
D3D11_VIDEO_USAGE_PLAYBACK_NORMAL
};
hr = m_videoDevice->CreateVideoProcessorEnumerator(&videoProcessorDesc, &m_videoEnumerator);
RETURN_VOID_IF_FAILED("Failed to create video enumerator");
}
if (!m_videoProcessor) {
hr = m_videoDevice->CreateVideoProcessor(m_videoEnumerator.Get(), 0, &m_videoProcessor);
RETURN_VOID_IF_FAILED("Failed to create video processor");
}
if (!m_outputView) {
D3D11_VIDEO_PROCESSOR_OUTPUT_VIEW_DESC outputDesc = { D3D11_VPOV_DIMENSION_TEXTURE2D };
hr = m_videoDevice->CreateVideoProcessorOutputView(
m_targetTexture.Get(), m_videoEnumerator.Get(), &outputDesc, &m_outputView);
RETURN_VOID_IF_FAILED("Failed to create video output view");
}
D3D11_VIDEO_PROCESSOR_INPUT_VIEW_DESC inputViewDesc = {
0, D3D11_VPIV_DIMENSION_TEXTURE2D, { 0, 0 }
};
ComPtr<ID3D11VideoProcessorInputView> inputView;
hr = m_videoDevice->CreateVideoProcessorInputView(
texture, m_videoEnumerator.Get(), &inputViewDesc, &inputView);
RETURN_VOID_IF_FAILED("Failed to create video input view");
ComPtr<ID3D11DeviceContext> context;
ComPtr<ID3D11VideoContext> videoContext;
m_d3dDevice->GetImmediateContext(&context);
hr = context.As(&videoContext);
RETURN_VOID_IF_FAILED("Failed to get video context");
D3D11_VIDEO_PROCESSOR_STREAM stream = { TRUE };
stream.pInputSurface = inputView.Get();
hr = videoContext->VideoProcessorBlt(
m_videoProcessor.Get(), m_outputView.Get(), 0, 1, &stream);
RETURN_VOID_IF_FAILED("Failed to get blit video frame");
}
private:
ComPtr<ID3D11Device> m_d3dDevice;
ComPtr<ID3D11Texture2D> m_targetTexture;
ID3D11Texture2D *m_target;
ComPtr<ID3D11VideoDevice> m_videoDevice;
ComPtr<ID3D11VideoProcessorEnumerator> m_videoEnumerator;
ComPtr<ID3D11VideoProcessor> m_videoProcessor;
ComPtr<ID3D11VideoProcessorOutputView> m_outputView;
};
#define CAMERA_SAMPLE_QUEUE_SIZE 5
class QWinRTCameraVideoRendererControlPrivate
{
public:
QScopedPointer<D3DVideoBlitter> blitter;
ComPtr<IMF2DBuffer> buffers[CAMERA_SAMPLE_QUEUE_SIZE];
QAtomicInteger<quint16> writeIndex;
QAtomicInteger<quint16> readIndex;
};
QWinRTCameraVideoRendererControl::QWinRTCameraVideoRendererControl(const QSize &size, QObject *parent)
: QWinRTAbstractVideoRendererControl(size, parent), d_ptr(new QWinRTCameraVideoRendererControlPrivate)
{
}
QWinRTCameraVideoRendererControl::~QWinRTCameraVideoRendererControl()
{
shutdown();
}
bool QWinRTCameraVideoRendererControl::render(ID3D11Texture2D *target)
{
Q_D(QWinRTCameraVideoRendererControl);
const quint16 readIndex = d->readIndex;
if (readIndex == d->writeIndex) {
emit bufferRequested();
return false;
}
HRESULT hr;
ComPtr<IMF2DBuffer> buffer = d->buffers[readIndex];
Q_ASSERT(buffer);
d->buffers[readIndex].Reset();
d->readIndex = (readIndex + 1) % CAMERA_SAMPLE_QUEUE_SIZE;
ComPtr<ID3D11Texture2D> sourceTexture;
ComPtr<IMFDXGIBuffer> dxgiBuffer;
hr = buffer.As(&dxgiBuffer);
Q_ASSERT_SUCCEEDED(hr);
hr = dxgiBuffer->GetResource(IID_PPV_ARGS(&sourceTexture));
if (FAILED(hr)) {
qErrnoWarning(hr, "The video frame does not support texture output; aborting rendering.");
return false;
}
ComPtr<ID3D11Device> device;
sourceTexture->GetDevice(&device);
if (!d->blitter || d->blitter->device() != device.Get() || d->blitter->target() != target)
d->blitter.reset(new D3DVideoBlitter(device.Get(), target));
d->blitter->blit(sourceTexture.Get());
emit bufferRequested();
return true;
}
void QWinRTCameraVideoRendererControl::queueBuffer(IMF2DBuffer *buffer)
{
Q_D(QWinRTCameraVideoRendererControl);
Q_ASSERT(buffer);
const quint16 writeIndex = (d->writeIndex + 1) % CAMERA_SAMPLE_QUEUE_SIZE;
if (d->readIndex == writeIndex) // Drop new sample if queue is full
return;
d->buffers[d->writeIndex] = buffer;
d->writeIndex = writeIndex;
}
void QWinRTCameraVideoRendererControl::discardBuffers()
{
Q_D(QWinRTCameraVideoRendererControl);
d->writeIndex = d->readIndex = 0;
for (ComPtr<IMF2DBuffer> &buffer : d->buffers)
buffer.Reset();
}
|
