Index: webrtc/modules/audio_processing/test/analog_volume_mapper.h |
diff --git a/webrtc/modules/audio_processing/test/analog_volume_mapper.h b/webrtc/modules/audio_processing/test/analog_volume_mapper.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..738205f506279af0bd89751cab5f0a52430376be |
--- /dev/null |
+++ b/webrtc/modules/audio_processing/test/analog_volume_mapper.h |
@@ -0,0 +1,45 @@ |
+/* |
+ * Copyright (c) 2017 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_TEST_ANALOG_VOLUME_MAPPER_H_ |
+#define WEBRTC_MODULES_AUDIO_PROCESSING_TEST_ANALOG_VOLUME_MAPPER_H_ |
+ |
+#include "webrtc/base/checks.h" |
+ |
+namespace webrtc { |
+ |
+// Class for simulating an analog gain controller controlled by |
+// webrtc::GainControl. The class wraps a mapping from the current |
+// level to a floating point scaling factor abstracting |
+// non-linearities in the gain curve of real analog microphones. The |
+// intended mode of operation is to use get_scaling_factor() to apply |
+// a gain factor to a signal. |
+class AnalogLevelMapper { |
AleBzk
2017/04/21 10:35:49
I thought about the class name and personally I'm
peah-webrtc
2017/04/21 12:04:39
I definitely think that this CL should include the
peah-webrtc
2017/04/21 12:04:39
An alternative to an interface would be to have a
aleloi
2017/04/24 11:34:45
Can I make a dependent CL for that after https://c
aleloi
2017/04/24 11:34:45
That makes sense. I've changed into const enum to
|
+ public: |
+ virtual ~AnalogLevelMapper() = default; |
+ |
+ // As the analog level limits in webrtc::GainControl, |level| must |
+ // be within [0, 65535]. |
peah-webrtc
2017/04/21 12:04:39
Is the maximum level really that high, I thought i
aleloi
2017/04/24 11:34:45
In the documentation to set_analog_level_limits it
|
+ void set_analog_level(int level) { |
+ RTC_DCHECK_LE(level_, 65535); |
+ RTC_DCHECK_LE(0, level_); |
+ level_ = level; |
+ } |
+ |
+ virtual int analog_level() const { return level_; } |
+ |
+ virtual float get_scaling_factor() const = 0; |
+ |
+ private: |
+ int level_ = 0; |
+}; |
+} // namespace webrtc |
+ |
+#endif // WEBRTC_MODULES_AUDIO_PROCESSING_TEST_ANALOG_VOLUME_MAPPER_H_ |