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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 #ifndef CHROME_BROWSER_IMAGE_DECODER_H_ | 5 #ifndef CHROME_BROWSER_IMAGE_DECODER_H_ |
6 #define CHROME_BROWSER_IMAGE_DECODER_H_ | 6 #define CHROME_BROWSER_IMAGE_DECODER_H_ |
7 | 7 |
8 #include <map> | 8 #include <map> |
9 #include <string> | 9 #include <string> |
10 #include <vector> | 10 #include <vector> |
11 | 11 |
12 #include "base/lazy_instance.h" | 12 #include "base/lazy_instance.h" |
13 #include "base/memory/ref_counted.h" | 13 #include "base/memory/ref_counted.h" |
14 #include "base/memory/scoped_ptr.h" | |
14 #include "base/sequence_checker.h" | 15 #include "base/sequence_checker.h" |
15 #include "base/sequenced_task_runner.h" | 16 #include "base/sequenced_task_runner.h" |
16 #include "base/synchronization/lock.h" | 17 #include "base/synchronization/lock.h" |
17 #include "base/timer/timer.h" | 18 #include "base/timer/timer.h" |
18 #include "content/public/browser/utility_process_host.h" | 19 #include "content/public/browser/utility_process_host.h" |
19 #include "content/public/browser/utility_process_host_client.h" | 20 #include "content/public/browser/utility_process_host_client.h" |
20 | 21 |
21 class SkBitmap; | 22 class SkBitmap; |
22 | 23 |
24 namespace image_decoder { | |
25 class ImageDecoder; | |
26 } | |
27 | |
28 namespace mojo { | |
29 template <typename T> class InterfacePtr; | |
30 } | |
31 | |
23 // This is a helper class for decoding images safely in a utility process. To | 32 // This is a helper class for decoding images safely in a utility process. To |
24 // use this, call ImageDecoder::Start(...) or | 33 // use this, call ImageDecoder::Start(...) or |
25 // ImageDecoder::StartWithOptions(...) on any thread. | 34 // ImageDecoder::StartWithOptions(...) on any thread. |
26 // | 35 // |
27 // Internally, most of the work happens on the IO thread, and then | 36 // Internally, most of the work happens on the IO thread, and then |
28 // the callback (ImageRequest::OnImageDecoded or | 37 // the callback (ImageRequest::OnImageDecoded or |
29 // ImageRequest::OnDecodeImageFailed) is posted back to the |task_runner_| | 38 // ImageRequest::OnDecodeImageFailed) is posted back to the |task_runner_| |
30 // associated with the ImageRequest. | 39 // associated with the ImageRequest. |
31 // The Cancel() method runs on whichever thread called it. |map_lock_| is used | 40 // The Cancel() method runs on whichever thread called it. |map_lock_| is used |
32 // to protect the data that is accessed from multiple threads. | 41 // to protect the data that is accessed from multiple threads. |
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143 // Protects |image_request_id_map_| and |image_request_id_counter_|. | 152 // Protects |image_request_id_map_| and |image_request_id_counter_|. |
144 base::Lock map_lock_; | 153 base::Lock map_lock_; |
145 | 154 |
146 // The UtilityProcessHost requests are sent to. | 155 // The UtilityProcessHost requests are sent to. |
147 base::WeakPtr<content::UtilityProcessHost> utility_process_host_; | 156 base::WeakPtr<content::UtilityProcessHost> utility_process_host_; |
148 | 157 |
149 // Calls StopBatchMode() after |kBatchModeTimeoutSeconds| have elapsed, | 158 // Calls StopBatchMode() after |kBatchModeTimeoutSeconds| have elapsed, |
150 // unless a new decoding request resets the timer. | 159 // unless a new decoding request resets the timer. |
151 scoped_ptr<base::DelayTimer<ImageDecoder>> batch_mode_timer_; | 160 scoped_ptr<base::DelayTimer<ImageDecoder>> batch_mode_timer_; |
152 | 161 |
162 // Mojo service connection. Must always be bound/reset and used on the IO | |
163 // thread. | |
164 scoped_ptr<mojo::InterfacePtr<image_decoder::ImageDecoder>> decoder_; | |
Sam McNally
2015/05/06 06:41:39
Why a scoped_ptr?
Anand Mistry (off Chromium)
2015/05/06 07:14:23
Let me paraphrase Dorothy:
gyp, and gn, and deps!
| |
165 | |
153 DISALLOW_COPY_AND_ASSIGN(ImageDecoder); | 166 DISALLOW_COPY_AND_ASSIGN(ImageDecoder); |
154 }; | 167 }; |
155 | 168 |
156 #endif // CHROME_BROWSER_IMAGE_DECODER_H_ | 169 #endif // CHROME_BROWSER_IMAGE_DECODER_H_ |
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