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1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "media/capture/video/linux/v4l2_capture_delegate_single_plane.h" | |
6 | |
7 #include <sys/mman.h> | |
8 | |
9 namespace media { | |
10 | |
11 scoped_refptr<V4L2CaptureDelegate::BufferTracker> | |
12 V4L2CaptureDelegateSinglePlane::CreateBufferTracker() const { | |
13 return make_scoped_refptr(new BufferTrackerSPlane()); | |
14 } | |
15 | |
16 bool V4L2CaptureDelegateSinglePlane::FillV4L2Format( | |
17 v4l2_format* format, | |
18 uint32_t width, | |
19 uint32_t height, | |
20 uint32_t pixelformat_fourcc) const { | |
21 format->fmt.pix.width = width; | |
22 format->fmt.pix.height = height; | |
23 format->fmt.pix.pixelformat = pixelformat_fourcc; | |
24 return true; | |
25 } | |
26 | |
27 void V4L2CaptureDelegateSinglePlane::FinishFillingV4L2Buffer( | |
28 v4l2_buffer* buffer) const { | |
29 buffer->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
30 } | |
31 | |
32 void V4L2CaptureDelegateSinglePlane::SetPayloadSize( | |
33 const scoped_refptr<BufferTracker>& buffer_tracker, | |
34 const v4l2_buffer& buffer) const { | |
35 buffer_tracker->SetPlanePayloadSize(0, buffer.bytesused); | |
36 } | |
37 | |
38 void V4L2CaptureDelegateSinglePlane::SendBuffer( | |
39 const scoped_refptr<BufferTracker>& buffer_tracker, | |
40 const v4l2_format& format) const { | |
41 client()->OnIncomingCapturedData( | |
42 buffer_tracker->GetPlaneStart(0), buffer_tracker->GetPlanePayloadSize(0), | |
43 capture_format(), rotation(), base::TimeTicks::Now()); | |
44 } | |
45 | |
46 bool V4L2CaptureDelegateSinglePlane::BufferTrackerSPlane::Init( | |
47 int fd, | |
48 const v4l2_buffer& buffer) { | |
49 // Some devices require mmap() to be called with both READ and WRITE. | |
50 // See http://crbug.com/178582. | |
51 void* const start = mmap(NULL, buffer.length, PROT_READ | PROT_WRITE, | |
52 MAP_SHARED, fd, buffer.m.offset); | |
53 if (start == MAP_FAILED) { | |
54 DLOG(ERROR) << "Error mmap()ing a V4L2 buffer into userspace"; | |
55 return false; | |
56 } | |
57 AddMmapedPlane(static_cast<uint8_t*>(start), buffer.length); | |
58 return true; | |
59 } | |
60 | |
61 } // namespace media | |
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