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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 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 // Implementation notes: | 5 // Implementation notes: |
6 // | 6 // |
7 // - It is recommended to first acquire the native sample rate of the default | 7 // - It is recommended to first acquire the native sample rate of the default |
8 // output device and then use the same rate when creating this object. | 8 // output device and then use the same rate when creating this object. |
9 // Use AudioManagerMac::HardwareSampleRate() to retrieve the sample rate. | 9 // Use AudioManagerMac::HardwareSampleRate() to retrieve the sample rate. |
10 // - Calling Close() also leads to self destruction. | 10 // - Calling Close() also leads to self destruction. |
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175 bool stopped_; | 175 bool stopped_; |
176 | 176 |
177 // Container for retrieving data from AudioSourceCallback::OnMoreData(). | 177 // Container for retrieving data from AudioSourceCallback::OnMoreData(). |
178 scoped_ptr<AudioBus> output_bus_; | 178 scoped_ptr<AudioBus> output_bus_; |
179 | 179 |
180 // Dynamically allocated FIFO used when CoreAudio asks for unexpected frame | 180 // Dynamically allocated FIFO used when CoreAudio asks for unexpected frame |
181 // sizes. | 181 // sizes. |
182 scoped_ptr<AudioPullFifo> audio_fifo_; | 182 scoped_ptr<AudioPullFifo> audio_fifo_; |
183 | 183 |
184 // Current buffer delay. Set by Render(). | 184 // Current buffer delay. Set by Render(). |
185 uint32 current_hardware_pending_bytes_; | 185 uint32_t current_hardware_pending_bytes_; |
186 | 186 |
187 // Lost frames not yet reported to the provider. Increased in | 187 // Lost frames not yet reported to the provider. Increased in |
188 // UpdatePlayoutTimestamp() if any lost frame since last time. Forwarded to | 188 // UpdatePlayoutTimestamp() if any lost frame since last time. Forwarded to |
189 // the provider and reset in ProvideInput(). | 189 // the provider and reset in ProvideInput(). |
190 uint32_t current_lost_frames_; | 190 uint32_t current_lost_frames_; |
191 | 191 |
192 // Stores the timestamp of the previous audio buffer requested by the OS. | 192 // Stores the timestamp of the previous audio buffer requested by the OS. |
193 // We use this in combination with |last_number_of_frames_| to detect when | 193 // We use this in combination with |last_number_of_frames_| to detect when |
194 // the OS has decided to skip rendering frames (i.e. a glitch). | 194 // the OS has decided to skip rendering frames (i.e. a glitch). |
195 // This can happen in case of high CPU load or excessive blocking on the | 195 // This can happen in case of high CPU load or excessive blocking on the |
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209 // Used to make sure control functions (Start(), Stop() etc) are called on the | 209 // Used to make sure control functions (Start(), Stop() etc) are called on the |
210 // right thread. | 210 // right thread. |
211 base::ThreadChecker thread_checker_; | 211 base::ThreadChecker thread_checker_; |
212 | 212 |
213 DISALLOW_COPY_AND_ASSIGN(AUHALStream); | 213 DISALLOW_COPY_AND_ASSIGN(AUHALStream); |
214 }; | 214 }; |
215 | 215 |
216 } // namespace media | 216 } // namespace media |
217 | 217 |
218 #endif // MEDIA_AUDIO_MAC_AUDIO_AUHAL_MAC_H_ | 218 #endif // MEDIA_AUDIO_MAC_AUDIO_AUHAL_MAC_H_ |
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