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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "media/capture/video/linux/v4l2_capture_delegate.h" | 5 #include "media/capture/video/linux/v4l2_capture_delegate.h" |
6 | 6 |
7 #include <poll.h> | 7 #include <poll.h> |
8 #include <sys/fcntl.h> | 8 #include <sys/fcntl.h> |
9 #include <sys/ioctl.h> | 9 #include <sys/ioctl.h> |
10 #include <sys/mman.h> | 10 #include <sys/mman.h> |
11 | 11 |
12 #include "base/bind.h" | 12 #include "base/bind.h" |
13 #include "base/files/file_enumerator.h" | 13 #include "base/files/file_enumerator.h" |
14 #include "base/posix/eintr_wrapper.h" | 14 #include "base/posix/eintr_wrapper.h" |
15 #include "base/strings/stringprintf.h" | 15 #include "base/strings/stringprintf.h" |
16 #include "media/base/bind_to_current_loop.h" | 16 #include "media/base/bind_to_current_loop.h" |
17 #include "media/capture/video/linux/v4l2_capture_delegate_multi_plane.h" | 17 #include "media/capture/video/linux/v4l2_capture_delegate_multi_plane.h" |
18 #include "media/capture/video/linux/v4l2_capture_delegate_single_plane.h" | 18 #include "media/capture/video/linux/v4l2_capture_delegate_single_plane.h" |
19 #include "media/capture/video/linux/video_capture_device_linux.h" | 19 #include "media/capture/video/linux/video_capture_device_linux.h" |
20 | 20 |
21 namespace media { | 21 namespace media { |
22 | 22 |
23 // Desired number of video buffers to allocate. The actual number of allocated | 23 // Desired number of video buffers to allocate. The actual number of allocated |
24 // buffers by v4l2 driver can be higher or lower than this number. | 24 // buffers by v4l2 driver can be higher or lower than this number. |
25 // kNumVideoBuffers should not be too small, or Chrome may not return enough | 25 // kNumVideoBuffers should not be too small, or Chrome may not return enough |
26 // buffers back to driver in time. | 26 // buffers back to driver in time. |
27 const uint32 kNumVideoBuffers = 4; | 27 const uint32_t kNumVideoBuffers = 4; |
28 // Timeout in milliseconds v4l2_thread_ blocks waiting for a frame from the hw. | 28 // Timeout in milliseconds v4l2_thread_ blocks waiting for a frame from the hw. |
29 const int kCaptureTimeoutMs = 200; | 29 const int kCaptureTimeoutMs = 200; |
30 // The number of continuous timeouts tolerated before treated as error. | 30 // The number of continuous timeouts tolerated before treated as error. |
31 const int kContinuousTimeoutLimit = 10; | 31 const int kContinuousTimeoutLimit = 10; |
32 // MJPEG is preferred if the requested width or height is larger than this. | 32 // MJPEG is preferred if the requested width or height is larger than this. |
33 const int kMjpegWidth = 640; | 33 const int kMjpegWidth = 640; |
34 const int kMjpegHeight = 480; | 34 const int kMjpegHeight = 480; |
35 // Typical framerate, in fps | 35 // Typical framerate, in fps |
36 const int kTypicalFramerate = 30; | 36 const int kTypicalFramerate = 30; |
37 | 37 |
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419 | 419 |
420 void V4L2CaptureDelegate::SetErrorState( | 420 void V4L2CaptureDelegate::SetErrorState( |
421 const tracked_objects::Location& from_here, | 421 const tracked_objects::Location& from_here, |
422 const std::string& reason) { | 422 const std::string& reason) { |
423 DCHECK(v4l2_task_runner_->BelongsToCurrentThread()); | 423 DCHECK(v4l2_task_runner_->BelongsToCurrentThread()); |
424 is_capturing_ = false; | 424 is_capturing_ = false; |
425 client_->OnError(from_here, reason); | 425 client_->OnError(from_here, reason); |
426 } | 426 } |
427 | 427 |
428 } // namespace media | 428 } // namespace media |
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