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| 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 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 // Creates an output stream based on the ALSA PCM interface. | 5 // Creates an output stream based on the ALSA PCM interface. |
| 6 // | 6 // |
| 7 // On device write failure, the stream will move itself to an invalid state. | 7 // On device write failure, the stream will move itself to an invalid state. |
| 8 // No more data will be pulled from the data source, or written to the device. | 8 // No more data will be pulled from the data source, or written to the device. |
| 9 // All calls to public API functions will either no-op themselves, or return an | 9 // All calls to public API functions will either no-op themselves, or return an |
| 10 // error if possible. Specifically, If the stream is in an error state, Open() | 10 // error if possible. Specifically, If the stream is in an error state, Open() |
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| 25 // introducing race conditions between tasks posted to the internal | 25 // introducing race conditions between tasks posted to the internal |
| 26 // message_loop, and the thread calling the public APIs. | 26 // message_loop, and the thread calling the public APIs. |
| 27 | 27 |
| 28 #ifndef MEDIA_AUDIO_LINUX_ALSA_OUTPUT_H_ | 28 #ifndef MEDIA_AUDIO_LINUX_ALSA_OUTPUT_H_ |
| 29 #define MEDIA_AUDIO_LINUX_ALSA_OUTPUT_H_ | 29 #define MEDIA_AUDIO_LINUX_ALSA_OUTPUT_H_ |
| 30 | 30 |
| 31 #include <alsa/asoundlib.h> | 31 #include <alsa/asoundlib.h> |
| 32 | 32 |
| 33 #include <string> | 33 #include <string> |
| 34 | 34 |
| 35 #include "base/gtest_prod_util.h" |
| 35 #include "base/lock.h" | 36 #include "base/lock.h" |
| 36 #include "base/ref_counted.h" | 37 #include "base/ref_counted.h" |
| 37 #include "base/scoped_ptr.h" | 38 #include "base/scoped_ptr.h" |
| 38 #include "base/thread.h" | 39 #include "base/thread.h" |
| 39 #include "media/audio/audio_io.h" | 40 #include "media/audio/audio_io.h" |
| 40 #include "testing/gtest/include/gtest/gtest_prod.h" | |
| 41 | 41 |
| 42 namespace media { | 42 namespace media { |
| 43 class SeekableBuffer; | 43 class SeekableBuffer; |
| 44 }; // namespace media | 44 }; // namespace media |
| 45 | 45 |
| 46 class AlsaWrapper; | 46 class AlsaWrapper; |
| 47 class AudioManagerLinux; | 47 class AudioManagerLinux; |
| 48 | 48 |
| 49 class AlsaPcmOutputStream : | 49 class AlsaPcmOutputStream : |
| 50 public AudioOutputStream, | 50 public AudioOutputStream, |
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| 84 virtual bool Open(uint32 packet_size); | 84 virtual bool Open(uint32 packet_size); |
| 85 virtual void Close(); | 85 virtual void Close(); |
| 86 virtual void Start(AudioSourceCallback* callback); | 86 virtual void Start(AudioSourceCallback* callback); |
| 87 virtual void Stop(); | 87 virtual void Stop(); |
| 88 virtual void SetVolume(double volume); | 88 virtual void SetVolume(double volume); |
| 89 virtual void GetVolume(double* volume); | 89 virtual void GetVolume(double* volume); |
| 90 | 90 |
| 91 private: | 91 private: |
| 92 friend class base::RefCountedThreadSafe<AlsaPcmOutputStream>; | 92 friend class base::RefCountedThreadSafe<AlsaPcmOutputStream>; |
| 93 friend class AlsaPcmOutputStreamTest; | 93 friend class AlsaPcmOutputStreamTest; |
| 94 FRIEND_TEST(AlsaPcmOutputStreamTest, AutoSelectDevice_DeviceSelect); | 94 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, |
| 95 FRIEND_TEST(AlsaPcmOutputStreamTest, AutoSelectDevice_FallbackDevices); | 95 AutoSelectDevice_DeviceSelect); |
| 96 FRIEND_TEST(AlsaPcmOutputStreamTest, AutoSelectDevice_HintFail); | 96 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, |
| 97 FRIEND_TEST(AlsaPcmOutputStreamTest, BufferPacket); | 97 AutoSelectDevice_FallbackDevices); |
| 98 FRIEND_TEST(AlsaPcmOutputStreamTest, BufferPacket_Negative); | 98 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, AutoSelectDevice_HintFail); |
| 99 FRIEND_TEST(AlsaPcmOutputStreamTest, BufferPacket_StopStream); | 99 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, BufferPacket); |
| 100 FRIEND_TEST(AlsaPcmOutputStreamTest, BufferPacket_Underrun); | 100 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, BufferPacket_Negative); |
| 101 FRIEND_TEST(AlsaPcmOutputStreamTest, BufferPacket_FullBuffer); | 101 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, BufferPacket_StopStream); |
| 102 FRIEND_TEST(AlsaPcmOutputStreamTest, ConstructedState); | 102 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, BufferPacket_Underrun); |
| 103 FRIEND_TEST(AlsaPcmOutputStreamTest, LatencyFloor); | 103 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, BufferPacket_FullBuffer); |
| 104 FRIEND_TEST(AlsaPcmOutputStreamTest, OpenClose); | 104 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, ConstructedState); |
| 105 FRIEND_TEST(AlsaPcmOutputStreamTest, PcmOpenFailed); | 105 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, LatencyFloor); |
| 106 FRIEND_TEST(AlsaPcmOutputStreamTest, PcmSetParamsFailed); | 106 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, OpenClose); |
| 107 FRIEND_TEST(AlsaPcmOutputStreamTest, ScheduleNextWrite); | 107 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, PcmOpenFailed); |
| 108 FRIEND_TEST(AlsaPcmOutputStreamTest, ScheduleNextWrite_StopStream); | 108 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, PcmSetParamsFailed); |
| 109 FRIEND_TEST(AlsaPcmOutputStreamTest, StartStop); | 109 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, ScheduleNextWrite); |
| 110 FRIEND_TEST(AlsaPcmOutputStreamTest, WritePacket_FinishedPacket); | 110 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, |
| 111 FRIEND_TEST(AlsaPcmOutputStreamTest, WritePacket_NormalPacket); | 111 ScheduleNextWrite_StopStream); |
| 112 FRIEND_TEST(AlsaPcmOutputStreamTest, WritePacket_StopStream); | 112 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, StartStop); |
| 113 FRIEND_TEST(AlsaPcmOutputStreamTest, WritePacket_WriteFails); | 113 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, WritePacket_FinishedPacket); |
| 114 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, WritePacket_NormalPacket); |
| 115 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, WritePacket_StopStream); |
| 116 FRIEND_TEST_ALL_PREFIXES(AlsaPcmOutputStreamTest, WritePacket_WriteFails); |
| 114 | 117 |
| 115 virtual ~AlsaPcmOutputStream(); | 118 virtual ~AlsaPcmOutputStream(); |
| 116 | 119 |
| 117 // Flags indicating the state of the stream. | 120 // Flags indicating the state of the stream. |
| 118 enum InternalState { | 121 enum InternalState { |
| 119 kInError = 0, | 122 kInError = 0, |
| 120 kCreated, | 123 kCreated, |
| 121 kIsOpened, | 124 kIsOpened, |
| 122 kIsPlaying, | 125 kIsPlaying, |
| 123 kIsStopped, | 126 kIsStopped, |
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| 242 MessageLoop* client_thread_loop_; | 245 MessageLoop* client_thread_loop_; |
| 243 | 246 |
| 244 // The message loop responsible for querying the data source, and writing to | 247 // The message loop responsible for querying the data source, and writing to |
| 245 // the output device. | 248 // the output device. |
| 246 MessageLoop* message_loop_; | 249 MessageLoop* message_loop_; |
| 247 | 250 |
| 248 DISALLOW_COPY_AND_ASSIGN(AlsaPcmOutputStream); | 251 DISALLOW_COPY_AND_ASSIGN(AlsaPcmOutputStream); |
| 249 }; | 252 }; |
| 250 | 253 |
| 251 #endif // MEDIA_AUDIO_LINUX_ALSA_OUTPUT_H_ | 254 #endif // MEDIA_AUDIO_LINUX_ALSA_OUTPUT_H_ |
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