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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 #include "content/renderer/media/audio_renderer_mixer_manager.h" | 5 #include "content/renderer/media/audio_renderer_mixer_manager.h" |
6 | 6 |
7 #include "base/bind.h" | 7 #include "base/bind.h" |
8 #include "base/bind_helpers.h" | 8 #include "base/bind_helpers.h" |
9 #include "content/renderer/media/audio_device_factory.h" | 9 #include "content/renderer/media/audio_device_factory.h" |
10 #include "media/audio/audio_output_device.h" | 10 #include "media/audio/audio_output_device.h" |
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45 const media::AudioParameters& params) { | 45 const media::AudioParameters& params) { |
46 const MixerKey key(source_render_view_id, params); | 46 const MixerKey key(source_render_view_id, params); |
47 base::AutoLock auto_lock(mixers_lock_); | 47 base::AutoLock auto_lock(mixers_lock_); |
48 | 48 |
49 AudioRendererMixerMap::iterator it = mixers_.find(key); | 49 AudioRendererMixerMap::iterator it = mixers_.find(key); |
50 if (it != mixers_.end()) { | 50 if (it != mixers_.end()) { |
51 it->second.ref_count++; | 51 it->second.ref_count++; |
52 return it->second.mixer; | 52 return it->second.mixer; |
53 } | 53 } |
54 | 54 |
55 // On ChromeOS we can rely on the playback device to handle resampling, so | 55 // On ChromeOS and Linux we can rely on the playback device to handle |
56 // don't waste cycles on it here. | 56 // resampling, so don't waste cycles on it here. |
57 #if defined(OS_CHROMEOS) | 57 #if defined(OS_CHROMEOS) || defined(OS_LINUX) |
58 int sample_rate = params.sample_rate(); | 58 int sample_rate = params.sample_rate(); |
59 #else | 59 #else |
60 int sample_rate = hardware_config_->GetOutputSampleRate(); | 60 int sample_rate = hardware_config_->GetOutputSampleRate(); |
61 #endif | 61 #endif |
62 | 62 |
63 // Create output parameters based on the audio hardware configuration for | 63 // Create output parameters based on the audio hardware configuration for |
64 // passing on to the output sink. Force to 16-bit output for now since we | 64 // passing on to the output sink. Force to 16-bit output for now since we |
65 // know that works well for WebAudio and WebRTC. | 65 // know that works well for WebAudio and WebRTC. |
66 media::AudioParameters output_params( | 66 media::AudioParameters output_params( |
67 media::AudioParameters::AUDIO_PCM_LOW_LATENCY, params.channel_layout(), | 67 media::AudioParameters::AUDIO_PCM_LOW_LATENCY, params.channel_layout(), |
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98 | 98 |
99 // Only remove the mixer if AudioRendererMixerManager is the last owner. | 99 // Only remove the mixer if AudioRendererMixerManager is the last owner. |
100 it->second.ref_count--; | 100 it->second.ref_count--; |
101 if (it->second.ref_count == 0) { | 101 if (it->second.ref_count == 0) { |
102 delete it->second.mixer; | 102 delete it->second.mixer; |
103 mixers_.erase(it); | 103 mixers_.erase(it); |
104 } | 104 } |
105 } | 105 } |
106 | 106 |
107 } // namespace content | 107 } // namespace content |
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