Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(225)

Side by Side Diff: media/capture/video/mac/video_capture_device_decklink_mac.h

Issue 2214533002: move //media/capture to //device/capture (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 4 years, 4 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View unified diff | Download patch
OLDNEW
(Empty)
1 // Copyright 2014 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 // Implementation of VideoCaptureDevice class for Blackmagic video capture
6 // devices by using the DeckLink SDK.
7
8 #ifndef MEDIA_CAPTURE_VIDEO_MAC_VIDEO_CAPTURE_DEVICE_DECKLINK_MAC_H_
9 #define MEDIA_CAPTURE_VIDEO_MAC_VIDEO_CAPTURE_DEVICE_DECKLINK_MAC_H_
10
11 #include "media/capture/video/video_capture_device.h"
12
13 #import <Foundation/Foundation.h>
14 #include <stddef.h>
15 #include <stdint.h>
16
17 #include "base/macros.h"
18 #include "base/synchronization/lock.h"
19 #include "base/threading/thread_checker.h"
20
21 namespace {
22 class DeckLinkCaptureDelegate;
23 } // namespace
24
25 namespace tracked_objects {
26 class Location;
27 } // namespace tracked_objects
28
29 namespace media {
30
31 // Extension of VideoCaptureDevice to create and manipulate Blackmagic devices.
32 // Creates a reference counted |decklink_capture_delegate_| that does all the
33 // DeckLink SDK configuration and capture work while holding a weak reference to
34 // us for sending back frames, logs and error messages.
35 class CAPTURE_EXPORT VideoCaptureDeviceDeckLinkMac : public VideoCaptureDevice {
36 public:
37 // Gets descriptors for all DeckLink video capture devices connected to this
38 // computer, as enumerated by the DeckLink SDK. To allow the user to choose
39 // exactly which capture format she wants, we enumerate as many cameras as
40 // capture formats.
41 static void EnumerateDevices(
42 VideoCaptureDeviceDescriptors* device_descriptors);
43
44 // Gets the supported formats of a particular device attached to the system,
45 // identified by |device|. Formats are retrieved from the DeckLink SDK.
46 // Following the enumeration, each camera will have only one capability.
47 static void EnumerateDeviceCapabilities(
48 const VideoCaptureDeviceDescriptor& descriptor,
49 VideoCaptureFormats* supported_formats);
50
51 explicit VideoCaptureDeviceDeckLinkMac(
52 const VideoCaptureDeviceDescriptor& descriptor);
53 ~VideoCaptureDeviceDeckLinkMac() override;
54
55 // Copy of VideoCaptureDevice::Client::OnIncomingCapturedData(). Used by
56 // |decklink_capture_delegate_| to forward captured frames.
57 void OnIncomingCapturedData(const uint8_t* data,
58 size_t length,
59 const VideoCaptureFormat& frame_format,
60 int rotation, // Clockwise.
61 base::TimeTicks reference_time,
62 base::TimeDelta timestamp);
63
64 // Forwarder to VideoCaptureDevice::Client::OnError().
65 void SendErrorString(const tracked_objects::Location& from_here,
66 const std::string& reason);
67
68 // Forwarder to VideoCaptureDevice::Client::OnLog().
69 void SendLogString(const std::string& message);
70
71 private:
72 // VideoCaptureDevice implementation.
73 void AllocateAndStart(
74 const VideoCaptureParams& params,
75 std::unique_ptr<VideoCaptureDevice::Client> client) override;
76 void StopAndDeAllocate() override;
77
78 // Protects concurrent setting and using of |client_|.
79 base::Lock lock_;
80 std::unique_ptr<VideoCaptureDevice::Client> client_;
81
82 // Reference counted handle to the DeckLink capture delegate, ref counted by
83 // the DeckLink SDK as well.
84 scoped_refptr<DeckLinkCaptureDelegate> decklink_capture_delegate_;
85
86 // Checks for Device (a.k.a. Audio) thread.
87 base::ThreadChecker thread_checker_;
88
89 DISALLOW_COPY_AND_ASSIGN(VideoCaptureDeviceDeckLinkMac);
90 };
91
92 } // namespace media
93
94 #endif // MEDIA_CAPTURE_VIDEO_MAC_VIDEO_CAPTURE_DEVICE_DECKLINK_MAC_H_
OLDNEW

Powered by Google App Engine
This is Rietveld 408576698