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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 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_UTILITY_MEDIA_GALLERIES_IPC_DATA_SOURCE_H_ | 5 #ifndef CHROME_UTILITY_MEDIA_GALLERIES_IPC_DATA_SOURCE_H_ |
| 6 #define CHROME_UTILITY_MEDIA_GALLERIES_IPC_DATA_SOURCE_H_ | 6 #define CHROME_UTILITY_MEDIA_GALLERIES_IPC_DATA_SOURCE_H_ |
| 7 | 7 |
| 8 #include <stdint.h> |
| 9 |
| 8 #include <map> | 10 #include <map> |
| 9 #include <string> | 11 #include <string> |
| 10 | 12 |
| 11 #include "base/memory/ref_counted.h" | 13 #include "base/memory/ref_counted.h" |
| 12 #include "base/threading/thread_checker.h" | 14 #include "base/threading/thread_checker.h" |
| 13 #include "chrome/utility/utility_message_handler.h" | 15 #include "chrome/utility/utility_message_handler.h" |
| 14 #include "media/base/data_source.h" | 16 #include "media/base/data_source.h" |
| 15 | 17 |
| 16 namespace base { | 18 namespace base { |
| 17 class TaskRunner; | 19 class TaskRunner; |
| 18 } | 20 } |
| 19 | 21 |
| 20 namespace metadata { | 22 namespace metadata { |
| 21 | 23 |
| 22 // Provides the metadata parser with bytes from the browser process via IPC. | 24 // Provides the metadata parser with bytes from the browser process via IPC. |
| 23 // Class must be created and destroyed on the utility thread. Class may be used | 25 // Class must be created and destroyed on the utility thread. Class may be used |
| 24 // as a DataSource on a different thread. The utility thread must not be blocked | 26 // as a DataSource on a different thread. The utility thread must not be blocked |
| 25 // for read operations to succeed. | 27 // for read operations to succeed. |
| 26 class IPCDataSource: public media::DataSource, | 28 class IPCDataSource: public media::DataSource, |
| 27 public UtilityMessageHandler { | 29 public UtilityMessageHandler { |
| 28 public: | 30 public: |
| 29 // May only be called on the utility thread. | 31 // May only be called on the utility thread. |
| 30 explicit IPCDataSource(int64 total_size); | 32 explicit IPCDataSource(int64_t total_size); |
| 31 ~IPCDataSource() override; | 33 ~IPCDataSource() override; |
| 32 | 34 |
| 33 // Implementation of DataSource. These methods may be called on any single | 35 // Implementation of DataSource. These methods may be called on any single |
| 34 // thread. First usage of these methods attaches a thread checker. | 36 // thread. First usage of these methods attaches a thread checker. |
| 35 void Stop() override; | 37 void Stop() override; |
| 36 void Read(int64 position, | 38 void Read(int64_t position, |
| 37 int size, | 39 int size, |
| 38 uint8* data, | 40 uint8_t* data, |
| 39 const ReadCB& read_cb) override; | 41 const ReadCB& read_cb) override; |
| 40 bool GetSize(int64* size_out) override; | 42 bool GetSize(int64_t* size_out) override; |
| 41 bool IsStreaming() override; | 43 bool IsStreaming() override; |
| 42 void SetBitrate(int bitrate) override; | 44 void SetBitrate(int bitrate) override; |
| 43 | 45 |
| 44 // Implementation of UtilityMessageHandler. May only be called on the utility | 46 // Implementation of UtilityMessageHandler. May only be called on the utility |
| 45 // thread. | 47 // thread. |
| 46 bool OnMessageReceived(const IPC::Message& message) override; | 48 bool OnMessageReceived(const IPC::Message& message) override; |
| 47 | 49 |
| 48 private: | 50 private: |
| 49 struct Request { | 51 struct Request { |
| 50 Request(); | 52 Request(); |
| 51 ~Request(); | 53 ~Request(); |
| 52 uint8* destination; | 54 uint8_t* destination; |
| 53 ReadCB callback; | 55 ReadCB callback; |
| 54 }; | 56 }; |
| 55 | 57 |
| 56 void ReadOnUtilityThread(int64 position, int size, uint8* data, | 58 void ReadOnUtilityThread(int64_t position, |
| 59 int size, |
| 60 uint8_t* data, |
| 57 const ReadCB& read_cb); | 61 const ReadCB& read_cb); |
| 58 | 62 |
| 59 void OnRequestBlobBytesFinished(int64 request_id, | 63 void OnRequestBlobBytesFinished(int64_t request_id, const std::string& bytes); |
| 60 const std::string& bytes); | |
| 61 | 64 |
| 62 const int64 total_size_; | 65 const int64_t total_size_; |
| 63 | 66 |
| 64 scoped_refptr<base::TaskRunner> utility_task_runner_; | 67 scoped_refptr<base::TaskRunner> utility_task_runner_; |
| 65 std::map<int64, Request> pending_requests_; | 68 std::map<int64_t, Request> pending_requests_; |
| 66 int64 next_request_id_; | 69 int64_t next_request_id_; |
| 67 | 70 |
| 68 base::ThreadChecker utility_thread_checker_; | 71 base::ThreadChecker utility_thread_checker_; |
| 69 | 72 |
| 70 // Enforces that the DataSource methods are called on one other thread only. | 73 // Enforces that the DataSource methods are called on one other thread only. |
| 71 base::ThreadChecker data_source_thread_checker_; | 74 base::ThreadChecker data_source_thread_checker_; |
| 72 }; | 75 }; |
| 73 | 76 |
| 74 } // namespace metadata | 77 } // namespace metadata |
| 75 | 78 |
| 76 #endif // CHROME_UTILITY_MEDIA_GALLERIES_IPC_DATA_SOURCE_H_ | 79 #endif // CHROME_UTILITY_MEDIA_GALLERIES_IPC_DATA_SOURCE_H_ |
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