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Side by Side Diff: media/capture/video/linux/v4l2_capture_delegate_multi_plane.cc

Issue 1685713003: Remove V4L2CaptureDelegate{Single,Multi}Plane, VCD::Client::OnIncomingCapturedYuvData() (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: perkj@ comments and reverted change to WeakPtr Created 4 years, 10 months ago
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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_multi_plane.h"
6
7 #include <stddef.h>
8 #include <sys/mman.h>
9
10 namespace media {
11
12 V4L2CaptureDelegateMultiPlane::V4L2CaptureDelegateMultiPlane(
13 const VideoCaptureDevice::Name& device_name,
14 const scoped_refptr<base::SingleThreadTaskRunner>& v4l2_task_runner,
15 int power_line_frequency)
16 : V4L2CaptureDelegate(device_name, v4l2_task_runner, power_line_frequency) {
17 }
18
19 V4L2CaptureDelegateMultiPlane::~V4L2CaptureDelegateMultiPlane() {
20 }
21
22 scoped_refptr<V4L2CaptureDelegate::BufferTracker>
23 V4L2CaptureDelegateMultiPlane::CreateBufferTracker() const {
24 return make_scoped_refptr(new BufferTrackerMPlane());
25 }
26
27 bool V4L2CaptureDelegateMultiPlane::FillV4L2Format(
28 v4l2_format* format,
29 uint32_t width,
30 uint32_t height,
31 uint32_t pixelformat_fourcc) const {
32 format->fmt.pix_mp.width = width;
33 format->fmt.pix_mp.height = height;
34 format->fmt.pix_mp.pixelformat = pixelformat_fourcc;
35
36 const size_t num_v4l2_planes =
37 V4L2CaptureDelegate::GetNumPlanesForFourCc(pixelformat_fourcc);
38 if (num_v4l2_planes == 0u)
39 return false;
40 DCHECK_LE(num_v4l2_planes, static_cast<size_t>(VIDEO_MAX_PLANES));
41 format->fmt.pix_mp.num_planes = num_v4l2_planes;
42
43 v4l2_planes_.resize(num_v4l2_planes);
44 return true;
45 }
46
47 void V4L2CaptureDelegateMultiPlane::FinishFillingV4L2Buffer(
48 v4l2_buffer* buffer) const {
49 buffer->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
50 buffer->length = v4l2_planes_.size();
51
52 static const struct v4l2_plane empty_plane = {};
53 std::fill(v4l2_planes_.begin(), v4l2_planes_.end(), empty_plane);
54 buffer->m.planes = v4l2_planes_.data();
55 }
56
57 void V4L2CaptureDelegateMultiPlane::SetPayloadSize(
58 const scoped_refptr<BufferTracker>& buffer_tracker,
59 const v4l2_buffer& buffer) const {
60 for (size_t i = 0; i < v4l2_planes_.size() && i < buffer.length; i++)
61 buffer_tracker->SetPlanePayloadSize(i, buffer.m.planes[i].bytesused);
62 }
63
64 void V4L2CaptureDelegateMultiPlane::SendBuffer(
65 const scoped_refptr<BufferTracker>& buffer_tracker,
66 const v4l2_format& format) const {
67 DCHECK_EQ(capture_format().pixel_format, PIXEL_FORMAT_I420);
68 const size_t y_stride = format.fmt.pix_mp.plane_fmt[0].bytesperline;
69 const size_t u_stride = format.fmt.pix_mp.plane_fmt[1].bytesperline;
70 const size_t v_stride = format.fmt.pix_mp.plane_fmt[2].bytesperline;
71 DCHECK_GE(y_stride, 1u * capture_format().frame_size.width());
72 DCHECK_GE(u_stride, 1u * capture_format().frame_size.width() / 2);
73 DCHECK_GE(v_stride, 1u * capture_format().frame_size.width() / 2);
74 client()->OnIncomingCapturedYuvData(
75 buffer_tracker->GetPlaneStart(0), buffer_tracker->GetPlaneStart(1),
76 buffer_tracker->GetPlaneStart(2), y_stride, u_stride, v_stride,
77 capture_format(), rotation(), base::TimeTicks::Now());
78 }
79
80 bool V4L2CaptureDelegateMultiPlane::BufferTrackerMPlane::Init(
81 int fd,
82 const v4l2_buffer& buffer) {
83 for (size_t p = 0; p < buffer.length; ++p) {
84 // Some devices require mmap() to be called with both READ and WRITE.
85 // See http://crbug.com/178582.
86 void* const start =
87 mmap(NULL, buffer.m.planes[p].length, PROT_READ | PROT_WRITE,
88 MAP_SHARED, fd, buffer.m.planes[p].m.mem_offset);
89 if (start == MAP_FAILED) {
90 DLOG(ERROR) << "Error mmap()ing a V4L2 buffer into userspace";
91 return false;
92 }
93 AddMmapedPlane(static_cast<uint8_t*>(start), buffer.m.planes[p].length);
94 DVLOG(3) << "Mmap()ed plane #" << p << " of " << buffer.m.planes[p].length
95 << "B";
96 }
97 return true;
98 }
99
100 } // namespace media
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