From 6cc3a9948b51193dfdcb0c3527d7f3d1ca38aa3c Mon Sep 17 00:00:00 2001 From: Jean-Michel Trivi Date: Tue, 10 Sep 2013 09:15:18 -0700 Subject: LoudnessEnhancer audio effect implementation Implementation based on DRC effect, controlled by a target gain. The target gain is used to amplify the signal at the input of the DRC, and to compute the knee of the DRC. Bug 8413913 Change-Id: I386d64793a9fa3f7218e053d6f0a99f6836c02bd --- media/libeffects/loudness/dsp/core/basic-inl.h | 48 ++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 media/libeffects/loudness/dsp/core/basic-inl.h (limited to 'media/libeffects/loudness/dsp/core/basic-inl.h') diff --git a/media/libeffects/loudness/dsp/core/basic-inl.h b/media/libeffects/loudness/dsp/core/basic-inl.h new file mode 100644 index 0000000..3f77147 --- /dev/null +++ b/media/libeffects/loudness/dsp/core/basic-inl.h @@ -0,0 +1,48 @@ +/* + * Copyright (C) 2013 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef LE_FX_ENGINE_DSP_CORE_BASIC_INL_H_ +#define LE_FX_ENGINE_DSP_CORE_BASIC_INL_H_ + +#include + +namespace le_fx { + +namespace sigmod { + +template +int SearchIndex(const T x_data[], + T x, + int start_index, + int end_index) { + int start = start_index; + int end = end_index; + while (end > start + 1) { + int i = (end + start) / 2; + if (x_data[i] > x) { + end = i; + } else { + start = i; + } + } + return start; +} + +} // namespace sigmod + +} // namespace le_fx + +#endif // LE_FX_ENGINE_DSP_CORE_BASIC_INL_H_ -- cgit v1.1