Index: webrtc/modules/audio_processing/level_controller/down_sampler.h |
diff --git a/webrtc/modules/audio_processing/level_controller/down_sampler.h b/webrtc/modules/audio_processing/level_controller/down_sampler.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..d95a72570918b5a61b262a9d568cf97e6944f248 |
--- /dev/null |
+++ b/webrtc/modules/audio_processing/level_controller/down_sampler.h |
@@ -0,0 +1,42 @@ |
+/* |
+ * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. |
+ * |
+ * Use of this source code is governed by a BSD-style license |
+ * that can be found in the LICENSE file in the root of the source |
+ * tree. An additional intellectual property rights grant can be found |
+ * in the file PATENTS. All contributing project authors may |
+ * be found in the AUTHORS file in the root of the source tree. |
+ */ |
+ |
+#ifndef WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_DOWN_SAMPLER_H_ |
+#define WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_DOWN_SAMPLER_H_ |
+ |
+#include <memory> |
+ |
+#include "webrtc/base/array_view.h" |
+#include "webrtc/base/constructormagic.h" |
+ |
+namespace webrtc { |
+ |
+class ApmDataDumper; |
+class BiQuadFilter; |
+ |
+class DownSampler { |
+ public: |
+ DownSampler(ApmDataDumper* data_dumper, int sample_rate_hz); |
hlundin-webrtc
2016/06/27 11:21:14
data_dumper is in some sense an output variable, s
peah-webrtc
2016/06/27 22:51:47
Done.
|
+ ~DownSampler(); |
hlundin-webrtc
2016/06/27 11:21:14
Do you need this? And if so, consider using = defu
peah-webrtc
2016/06/27 22:51:47
I think it is needed as the ApmDataDumper and BiQu
hlundin-webrtc
2016/06/28 11:29:00
Acknowledged.
peah-webrtc
2016/06/28 22:19:37
Acknowledged.
|
+ |
+ void DownSample(rtc::ArrayView<const float> in, rtc::ArrayView<float> out); |
+ |
+ private: |
+ ApmDataDumper* data_dumper_; |
+ const int sample_rate_hz_; |
+ std::unique_ptr<BiQuadFilter> low_pass_filter_; |
+ int down_sampling_factor_; |
+ |
+ RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(DownSampler); |
+}; |
+ |
+} // namespace webrtc |
+ |
+#endif // WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_DOWN_SAMPLER_H_ |